KR20210043710A - Method for producing a metal clad laminate - Google Patents

Abstract

A method of efficiently manufacturing a metal-clad laminate is provided. In the above manufacturing method, a pair of pressure rolls (r ₁ , r ₂ ), a pair of release member unwinding rolls (16, 16), and a plurality of unwinding rolls for unwinding the constituent materials of the metal-clad laminate are prepared, and the While the constituent material forms at least a state (M)/(M) in which metal foils are adjacent to each other, a pair of release members (C ₁ , C ₂ ) is provided with each unwinding roll so that the entire constituent material is sandwiched therebetween. To place. One pair of release members (C ₁ , C ₂ ) is heated in advance, and then the whole _{is thermally compressed with the pair of pressing rolls (r 1} , r ₂ ) while sandwiching the constituent materials, and then peeled off. Through the process, a plurality of metal-clad laminates are produced.

Description

Method for producing a metal clad laminate

This application claims the priority of patent application 2018-178691 for which it applied in Japan on September 25, 2018, and the whole is cited as constituting a part of this application by reference.

In the present invention, at least one of a film made of a thermoplastic polymer capable of forming an optically anisotropic molten phase (hereinafter, this may be referred to as a thermoplastic liquid crystal polymer) (hereinafter, this may be referred to as a thermoplastic liquid crystal polymer film) The present invention relates to a method for producing a metal-clad laminate (or a metal-clad laminate having a metal layer on at least one surface of a thermoplastic liquid crystal polymer film) in which a metal foil is laminated on the surface of the film.

The thermoplastic liquid crystal polymer film is known as a material excellent in high heat resistance, low hygroscopicity, high frequency characteristics, and the like, and has recently attracted attention as an electronic circuit material for high-speed transmission. When used for electronic circuit board applications, a laminate of a thermoplastic liquid crystal polymer film and a metal foil typified by copper foil is used, but as a technology for manufacturing a laminate composed of such a thermoplastic liquid crystal polymer film and a metal foil, a hot press device is used. , A method of superposing a thermoplastic liquid crystal polymer film cut to a predetermined size and a metal foil between the upper and lower hot plates, and performing heat-compression bonding in a vacuum state is exemplified. However, since this method is a batch type, there is a problem that the production efficiency is poor.

On the other hand, a method in which a thermoplastic liquid crystal polymer film and a metal foil are stacked on top of each other and continuously thermally bonded by a roll-to-roll type (hereinafter, referred to as a roll type) is advantageous in terms of production efficiency. In particular, in manufacturing by a roll type, as a method of manufacturing a metal laminate with industrially satisfactory productivity, Patent Document 1 (International Publication No. 2011/093427) discloses the surface roughness (Rz) of both the front and back sides by a roll method. Using a separation film (C) of 2.0 µm or less, (r ₁ )/(B)/(A)/(C)/(A)/(B) _{between a pair of pressing rolls (r 1} , r ₂₎ In order of /(r ₂ ), the insulating film (A), the metal foil (B), and the separating film (C) are stacked and thermally pressed and peeled from the separating film (C) to obtain two single-sided metal-clad laminates. A method of manufacturing a metal-clad laminate is disclosed.

In addition, in Patent Document 2 (Japanese Patent Laid-Open No. 2014-128913), as a method for producing a double-sided metal-clad laminate in which metal foils (B, B') are adhered to both sides of an insulating film (A), the heat capacity is 50 to 150 using the separated film (C) in the range of the J / ㎡, between the pressure roll (r _1, r ₂₎ of the pair _{(r 1) / (B)} / (a) / (B ') / ( In the order of C)/(B')/(A)/(B)/(r ₂ ), an insulating film (A), a metal foil (B, B'), and a separation film (C) are stacked and thermally pressed, Thereafter, a method for producing a double-sided metal-clad laminate in which two double-sided metal-clad laminates are obtained by separating or peeling the double-sided metal-clad laminate from the separation film (C) is disclosed.

International Publication No. 2011/093427 Japanese Unexamined Patent Publication No. 2014-128913

In these patent documents, it is characterized in that both metal-clad laminates are arranged so as to abut against the separation film in an up-and-down symmetric manner with the separation film as the center, and thermal compression bonding is performed in a roll type. However, in these documents, the separation film disposed at the center is introduced into the heating roll and directly contacts the metal-clad laminate.

Typically, since the thermocompression bonding temperature of the thermoplastic liquid crystal polymer film is carried out at a temperature exceeding 200°C, the separation film having a high absorption rate is introduced into the pressurizing roll as it is at room temperature, and when rapidly heated by the pressurizing roll, the temperature is 200°C from the room temperature. Since it is heated at a stretch at an excessive high temperature, the moisture in the separated film is rapidly volatilized.

Then, since the separation film comes into contact with the constituent material of the metal-clad laminate at the same time as it is introduced into the heating roll, moisture rapidly evaporating from the separation film directly acts on the constituent material of the metal-clad laminate, and as a result, the metal Problems such as appearance defects such as bubble marks and lamination defects occur in the coated laminate. In addition, appearance defects such as wrinkles, lamination defects, etc. occur in the metal-clad laminate due to the difference in the coefficient of thermal expansion between the separated film and other materials due to thermal expansion caused by the rapid increase in temperature during thermocompression bonding. In addition, when moisture is present inside the separation film, the thermoplastic polymer is hydrolyzed by the heated water vapor at once, and as a result, the low molecular weight thermoplastic liquid crystal polymer of the metal-clad laminate adheres to the surface of the separation film, thereby forming the separation film. It cannot be used repeatedly.

It is an object of the present invention to solve these problems and to provide a method for efficiently manufacturing a metal-clad laminate in a roll type.

In order to achieve the above object, the inventors of the present invention have studied intensively in order to achieve the above object. As a result, even when two or more metal-clad laminates are simultaneously thermocompressed as a multi-axial laminate, the constituent material of the metal-clad laminate (hereinafter, simply referred to as a constituent material). It may be referred to as) by heating the release material before contacting the release material, (i) removing moisture from the release material and suppressing the occurrence of water-derived problems in the metal-clad laminate, (ii) By reducing the difference in the coefficient of thermal expansion between the release material and the constituent material, it is possible to prevent wrinkles, etc. from occurring in the metal-clad laminate, (iii) In addition, in such a manufacturing method, contamination of the release material is prevented, Because the release material can be repeatedly used, it is excellent in economics, and if the metal foils are adjacent to each other and thermal compression is performed by sandwiching the constituent materials as a whole, rapid heating to the metal foil can be prevented. As a result, it was found that it was possible to efficiently peel between metal foils in the peeling step to produce a metal-clad laminate, and the present invention was completed.

That is, the present invention can be constituted by the following aspects.

[Mode 1]

A pair of pressurizing rolls (r ₁ , r ₂ ), a _{pair of release material unwinding rolls for unwinding a release member (C 1} , C ₂ ), a plurality of metal coatings composed of a thermoplastic liquid crystal polymer film (F) and a metal foil (M) A step of preparing a plurality of unwinding rolls for unwinding a constituent material for forming a laminate,

The plurality of unwinding rolls are arranged so that the constituent material forms at least a state (M)/(M) adjacent to each other, and the pair of release members (C ₁ , C ₂ ) is the constituent material An arrangement process of arranging a release material unwinding roll so as to sandwich the whole,

A heating step in which the pair of release members (C ₁ , C ₂ ) is unwound from a release material unwinding roll and heated respectively,

A pair of release members (C ₁ , C ₂ ) that have gone through the heating process, while sandwiching the constituent material, the entire pair of pressing rolls (r ₁ , r ₂ ) The thermocompression bonding process introduced into the,

After the thermocompression bonding step, by at least one release roll, the release material (C ₁ , C ₂ ) and the thermoplastic liquid crystal polymer film (F) and/or metal foil (M) in contact with the release material (C ₁ , C ₂₎ A method for producing a metal-clad laminate comprising at least a peeling step in which each of these is peeled off, and the adjacent metal foil (M) and the metal foil (M) are peeled off.

[Mode 2]

As the manufacturing method according to aspect 1, a method for manufacturing a metal-clad laminate in which the thermoplastic liquid crystal polymer film (F) is brought into contact with one or both of _{the mold release materials (C 1} , C _{2 ).}

[Mode 3]

As the manufacturing method according to aspect 1, the metal foil (M) is in contact with one or both of _{the mold release materials (C 1} , C _{2 ).}

[Mode 4]

A manufacturing method according to aspect 1 or 2, wherein in the thermocompression bonding step, between the pair of pressing rolls (r ₁ and r ₂ ), (r ₁ )/(C ₁ )/(F)/(M) /(M)/(F)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,

In the above peeling step, a _{metal-clad laminate is obtained by peeling between (C 1} )/(F), (F)/(C ₂ ) and (M)/(M) to obtain two metal-clad laminates. Manufacturing method.

[Mode 5]

A manufacturing method according to aspect 1 or 2, wherein in the thermocompression bonding step, between the pair of pressing rolls (r ₁ and r ₂ ), (r ₁ )/(C ₁ )/(F)/(M) /(M)/(F)/(M)/(M)/(F)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,

In the above peeling step, the _{metal-clad laminate is peeled between (C 1} )/(F), (F)/(C ₂ ) and (M)/(M) to obtain three metal-clad laminates. Manufacturing method.

[Mode 6]

A manufacturing method according to aspect 1 or 3, wherein in the thermocompression bonding step, (r ₁ )/(C ₁ )/(M)/(F)/ _{between the pair of pressing rolls (r 1} , r ₂₎ (M)/(M)/(F)/(M)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,

In the above peeling step, a _{metal-clad laminate is obtained by peeling between (C 1} )/(M), (M)/(C ₂ ) and (M)/(M) to obtain two metal-clad laminates. Manufacturing method.

[Mode 7]

A manufacturing method according to aspect 1 or 3, wherein in the thermocompression bonding step, (r ₁ )/(C ₁ )/(M)/(F)/ _{between the pair of pressing rolls (r 1} , r ₂₎ (M)/(M)/(F)/(M)/(M)/(F)/(M)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,

In the above peeling step, the _{metal-clad laminate is peeled between (C 1} )/(M), (M)/(C ₂ ) and (M)/(M) to obtain three metal-clad laminates. Manufacturing method.

[Mode 8]

As the production method according to any one of aspects 1 to 7, the release material (C ₁ ) and/or the release material (C ₂ ) is a release material selected from the group consisting of a heat-resistant resin film, a heat-resistant composite film, and a heat-resistant nonwoven fabric, metal coating. Method for producing a laminate.

[Mode 9]

As the manufacturing method according to any one of aspects 1 to 8, in the heating step, the pair of release members (C ₁ , C ₂ ) are unwound from the release member unwinding rolls, and each of the pair of pressing rolls (r ₁ , r ₂ ) by external contact, each of the mold release material is heated, the method for producing a metal-clad laminate.

[Mode 10]

As the manufacturing method according to aspect 9, in the heating step, the time in which the pair of release members (C ₁ , C ₂ ) contacts the pair of pressing rolls (r ₁ , r ₂ ) externally, 1.0 second or more, the method for producing a metal-clad laminate.

[Mode 11]

Embodiment 9 or a 10 process according to, further, the pair of the releasing member (C _1, C ₂₎ the pressure roll of the pair (r _1, r ₂₎ to the first pair of guide rolls for the circumscribed about ( g ₁ , g ₂ ) A method for producing a metal-clad laminate.

[Mode 12]

A production method according to any one of aspects 1 to 11, further comprising: a cooling roll for cooling the laminate that has passed through the _{pair of pressure rolls (r 1} , r _{2 ).} Manufacturing method.

[Mode 13]

In the production method according to any one of aspects 1 to 5 and 8 to 12, _{the peel strength of the thermoplastic liquid crystal polymer film (F) after thermocompression bonding and the release material (C 1} ) or _{the release material (C 2} ) is 0.6 kN/m or less ( More preferably, 0.4 kN/m or less, 0.3 kN/m or less).

[Mode 14]

As the manufacturing method according to any one of aspects 1-3 and 6-13 _{, the peel strength of the metal foil (M) and the mold release material (C 1} ) or the mold _{release material (C 2} ) after thermocompression is 0.3 kN/m or less (more preferably Is 0.2 kN/m or less, 0.1 kN/m or less)

[Mode 15]

As the production method according to any one of aspects 1 to 14, the peel strength between the metal foil (M) and the metal foil (M) after thermocompression bonding is 0.3 kN/m or less (more preferably 0.2 kN/m or less, 0.1 kN/ m or less) phosphorus, a method for producing a metal-clad laminate.

In addition, any combination of at least two components disclosed in the claims and/or the specification and/or the drawings are included in the present invention. In particular, any combination of two or more of the claims set forth in the claims is encompassed by the present invention.

Advantageous Effects of Invention According to the present invention, since the release member can be thermocompressed by contacting the constituent material in a state in which the moisture content is reduced, it is possible to efficiently manufacture a metal-clad laminate that does not cause appearance defects such as blister marks or wrinkles . Further, since the release member is preheated in the heating step, the difference in the coefficient of thermal expansion between the release member and the constituent material at the time of lamination can be reduced, and wrinkles or the like can be prevented from occurring in the metal-clad laminate. Therefore, in such a manufacturing method, the mold release material is prevented from being contaminated, and the mold release material can be repeatedly used, which is excellent in economy. _{In addition, by using a release material (C 1} , C ₂ ) that has undergone a heating process, the constituent materials are entirely sandwiched between the constituent materials in a state where the metal foils are adjacent to each other, and thermal compression is performed to prevent heat from being released to the metal foil at once, and the peeling process In, it becomes possible to rapidly separate the laminate and improve production efficiency.

This invention is more clearly understood from the description of the following preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for mere illustration and description, and should not be used to define the scope of the present invention. The scope of this invention is determined by the attached claims. In the accompanying drawings, the same part number in a plurality of drawings indicates the same part. The drawings are not necessarily drawn to scale, and are exaggerated in showing the principles of the present invention.
1 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a first embodiment of the present invention.
2 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a second embodiment of the present invention.
3 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a third embodiment of the present invention.
4 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a fourth embodiment of the present invention.
5 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a fifth embodiment of the present invention.
6 is a schematic side view for explaining a modified example of the method for manufacturing a metal-clad laminate according to the first embodiment of the present invention.
7 is a schematic side view for explaining another modified example of the method for manufacturing a metal-clad laminate according to the first embodiment of the present invention.

In the method for producing a metal-clad laminate of the present invention, a plurality of sets of a metal-clad laminate obtained by laminating a metal foil on at least one surface of a thermoplastic liquid crystal polymer film can be continuously produced.

(Thermoplastic liquid crystal polymer film)

The thermoplastic liquid crystal polymer film used in the production method of the present invention is formed of a liquid crystal polymer that can be melt-molded. This thermoplastic liquid crystal polymer is a polymer capable of forming an optically anisotropic melt phase, and as long as it is a liquid crystal polymer capable of melt molding, the chemical composition is not particularly limited, but, for example, a thermoplastic liquid crystal polyester, or Thermoplastic liquid crystal polyester amides into which an amide bond has been introduced are exemplified.

Further, the thermoplastic liquid crystal polymer may be a polymer in which an isocyanate-derived bond such as an imide bond, a carbonate bond, a carbodiimide bond or an isocyanurate bond is introduced into the aromatic polyester or aromatic polyester amide.

Specific examples of the thermoplastic liquid crystal polymer used in the present invention include known thermoplastic liquid crystal polyesters and thermoplastic liquid crystal polyester amides derived from compounds classified into (1) to (4) and derivatives thereof exemplified below. have. However, it goes without saying that in order to form a polymer capable of forming an optically anisotropic molten phase, there is a suitable range for the combination of various raw material compounds.

(1) Aromatic or aliphatic dihydroxy compound (refer to Table 1 for representative examples)

(2) Aromatic or aliphatic dicarboxylic acid (refer to Table 2 for representative examples)

(3) Aromatic dihydroxycarboxylic acid (refer to Table 3 for representative examples)

(4) Aromatic diamine, aromatic hydroxyamine or aromatic aminocarboxylic acid (refer to Table 4 for representative examples)

Representative examples of the thermoplastic liquid crystal polymers obtained from these raw material compounds include copolymers having structural units shown in Tables 5 and 6.

Among these copolymers, a polymer containing at least p-hydroxybenzoic acid and/or 6-hydroxy-2-naphthoic acid as a repeating unit is preferable, and in particular, (i) p-hydroxybenzoic acid and 6-hydroxy- A polymer containing a repeating unit of 2-naphthoic acid, or (ii) at least one aromatic hydroxycarboxylic acid selected from the group consisting of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, and at least one A copolymer containing a repeating unit of an aromatic diol and at least one aromatic dicarboxylic acid is preferred.

For example, in the polymer of (i), when the thermoplastic liquid crystal polymer contains at least a repeating unit of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, p-hydroxy of the repeating unit (A) The molar ratio (A)/(B) of benzoic acid and 6-hydroxy-2-naphthoic acid of the repeating unit (B) is (A)/(B) = about 10/90 to 90/10 in the thermoplastic liquid crystal polymer. It is preferable that it is, more preferably, (A)/(B) = about 15/85 to 85/15 may be sufficient, and still more preferably, (A)/(B) = about 20/80 to 80/20 You can open it.

In the case of the polymer of (ii), at least one aromatic hydroxycarboxylic acid (C) selected from the group consisting of p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid, and 4,4' -At least one aromatic diol (D) selected from the group consisting of dihydroxybiphenyl, hydroquinone, phenylhydroquinone, and 4,4'-dihydroxydiphenyl ether, terephthalic acid, isophthalic acid and 2, The molar ratio of each repeating unit in the thermoplastic liquid crystal polymer of at least one aromatic dicarboxylic acid (E) selected from the group consisting of 6-naphthalenedicarboxylic acid is aromatic hydroxycarboxylic acid (C): Said aromatic diol (D): Said aromatic dicarboxylic acid (E) = (30 to 80): (35 to 10): (35 to 10) may be sufficient, more preferably (C): (D): (E) = (35 to 75): (32.5 to 12.5): (32.5 to 12.5) may be sufficient, more preferably (C): (D): (E) = (40 to 70): (30 to 15): It may be about (30 to 15).

In addition, the molar ratio of the repeating unit derived from 6-hydroxy-2-naphthoic acid in the aromatic hydroxycarboxylic acid (C) may be, for example, 85 mol% or more, preferably 90 mol% or more, More preferably, it may be 95 mol% or more. The molar ratio of the repeating unit derived from 2,6-naphthalenedicarboxylic acid in the aromatic dicarboxylic acid (E) may be, for example, 85 mol% or more, preferably 90 mol% or more, more preferably May be 95 mol% or more.

In addition, the aromatic diol (D) is selected from the group consisting of hydroquinone, 4,4'-dihydroxybiphenyl, phenylhydroquinone, and 4,4'-dihydroxydiphenyl ether. The repeating units (D1) and (D2) derived from the aromatic diol may be used, and in that case, the molar ratio of the two aromatic diols may be (D1)/(D2) = 23/77 to 77/23, more preferably May be 25/75 to 75/25, more preferably 30/70 to 70/30.

Further, the molar ratio of the repeating structural unit derived from the aromatic diol and the repeating structural unit derived from the aromatic dicarboxylic acid is preferably (D)/(E) = 95/100 to 100/95. Outside this range, the degree of polymerization does not increase and the mechanical strength tends to decrease.

In addition, that the optically anisotropic melt phase can be formed in the present invention can be recognized by, for example, placing a sample on a hot stage, heating it at elevated temperature in a nitrogen atmosphere, and observing the transmitted light of the sample.

As the thermoplastic liquid crystal polymer, the melting point (hereinafter referred to as Tm ₀ ) may be in the range of 200 to 360°C, preferably in the range of 240 to 360°C, and more preferably in the range of 260 to 360°C. , More preferably, Tm ₀ is 270 to 350°C. In addition, Tm ₀ is calculated|required by measuring the temperature at which a main endothermic peak appears with a differential scanning calorimeter (Shimadzu Corporation DSC). That is, after heating the thermoplastic liquid crystal polymer sample at a rate of 10° C./min to completely melt it, the melt is cooled to 50° C. at a rate of 10° C./min, and the endothermic peak appears after raising the temperature at a rate of 10° C./min. The position is determined as the melting point of the thermoplastic liquid crystal polymer sample.

In the thermoplastic liquid crystal polymer, polyethylene terephthalate, modified polyethylene terephthalate, polyolefin, polycarbonate, polyarylate, polyamide, polyphenylene sulfide, polyether ether ketone, fluorine within the range not impairing the effects of the present invention. Thermoplastic polymers, such as resin, various additives, fillers, etc. may be added.

The thermoplastic liquid crystal polymer film used in the production method of the present invention is obtained, for example, by extrusion molding the melt-kneaded product of the thermoplastic liquid crystal polymer. As the extrusion molding method, any method is used, but a well-known T-die method, an inflation method, and the like are industrially advantageous. In particular, in the inflation method, stress is applied not only to the mechanical axis direction of the thermoplastic liquid crystal polymer film (hereinafter, abbreviated as MD direction), but also to the direction perpendicular thereto (hereinafter, abbreviated as TD direction), and thus in the MD direction and the TD direction. Since it can be stretched uniformly, a thermoplastic liquid crystal polymer film in which molecular orientation and dielectric properties in the MD and TD directions are controlled can be obtained.

For example, in extrusion molding by the T-die method, the melt sheet extruded from the T-die may be simultaneously stretched and formed into a film not only in the MD direction of the thermoplastic liquid crystal polymer film, but also in both this and the TD direction. Alternatively, the melt sheet extruded from the T-die may be stretched once in the MD direction, and then stretched in the TD direction to form a film.

In addition, in the extrusion molding by the inflation method, the cylindrical sheet melt-extruded from the ring die is subjected to a predetermined draw ratio (corresponding to the draw ratio in the MD direction) and the blow ratio (corresponding to the draw ratio in the TD direction). It may be stretched and formed into a film.

The draw ratio of such extrusion molding, as the draw ratio (or draw ratio) in the MD direction, may be, for example, about 1.0 to 10, preferably about 1.2 to 7, more preferably about 1.3 to 7 . Moreover, as a draw ratio (or blow ratio) in a TD direction, it may be about 1.5-20, Preferably it is about 2-15, More preferably, it may be about 2.5-14.

Further, if necessary, a known or commonly used heat treatment may be performed to adjust the melting point and/or the thermal expansion coefficient of the thermoplastic liquid crystal polymer film. The heat treatment conditions can be appropriately set according to the purpose, for example, the melting point of the thermoplastic liquid crystal polymer (Tm ₀ )-10 °C or higher (for example, Tm _0-10 °C to Tm ₀ + 30 °C, preferably by heating for several hours at _{Tm 0 ℃ ~ Tm 0 + 20} ℃ degree), it is also possible to increase the melting point (Tm) of the thermoplastic liquid crystal polymer film.

The melting point (Tm) of the thermoplastic liquid crystal polymer film may be, for example, 270 to 380°C, and preferably in the range of 280 to 370°C.

In addition, the melting point (Tm) of the thermoplastic liquid crystal polymer film can be obtained by observing the thermal behavior of the thermoplastic liquid crystal polymer film sample using a differential scanning calorimeter. That is, the position of the endothermic peak appearing when the temperature of the thermoplastic liquid crystal polymer film sample is raised at a rate of 10° C./min can be obtained as the melting point (Tm) of the thermoplastic liquid crystal polymer film.

(Metal foil)

The metal foil used in the manufacturing method of the present invention is not particularly limited, and may be, for example, gold, silver, copper, iron, nickel, aluminum, or alloy metals thereof. From a viewpoint, a copper foil or a stainless steel foil is preferable. Moreover, as a copper foil, what is produced by a rolling method or an electrolytic method can be used.

The thickness of the metal foil can be appropriately set as necessary, and may be, for example, about 5 to 50 µm, more preferably in the range of 8 to 35 µm. Further, the metal foil may be subjected to surface treatment such as roughening treatment which is usually performed.

(Lee Hyungjae)

The mold release material used in the manufacturing method of the present invention is not particularly limited as long as it can be easily peeled off from an adjacent adherend after thermocompression, and has heat resistance, and is a non-thermoplastic polyimide film, aramid film, or Teflon (registered trademark ) Heat-resistant resin films such as films; Heat-resistant composite film (for example, a composite film composed of a plurality of heat-resistant resin films, a composite film composed of a metal foil and a heat-resistant resin film); Metal foils such as aluminum foil and stainless steel foil; And heat-resistant nonwoven fabrics composed of heat-resistant fibers (eg, heat-resistant resin fibers and metal fibers). These mold release materials may be used alone or in combination of two or more.

Among these mold release materials, a heat-resistant resin film, a heat-resistant composite film, and a heat-resistant nonwoven fabric are preferable from the viewpoint of excellent heat resistance and resilience.

The thickness of the mold release material can be appropriately set as needed, and may be, for example, about 10 to 300 µm, preferably 15 to 150 µm, and more preferably 15 to 45 µm. Further, the mold release material may be subjected to a mold release treatment on one side or both sides for the purpose of improving the peelability from the adherend after thermocompression bonding. As a method of the mold release treatment, for example, a method of forming a heat-resistant mold release resin film such as a silicone resin or a fluorine resin on at least one surface of the mold release material may be mentioned.

(Method of manufacturing metal-clad laminate)

The method for producing a metal-clad laminate of the present invention,

A pair of pressurizing rolls (r ₁ , r ₂ ), a _{pair of release material unwinding rolls for unwinding a release member (C 1} , C ₂ ), a plurality of metal coatings composed of a thermoplastic liquid crystal polymer film (F) and a metal foil (M) A step of preparing a plurality of unwinding rolls for unwinding a constituent material for forming a laminate,

The plurality of unwinding rolls are arranged so that the constituent material forms at least a state (M)/(M) adjacent to each other, and the pair of release members (C ₁ , C ₂ ) is the constituent material An arrangement process of arranging a release material unwinding roll so as to sandwich the whole,

A heating step in which the pair of release members (C ₁ , C ₂ ) is unwound from a release material unwinding roll, and each of the release members is heated,

A thermocompression bonding step in which a pair of release members (C ₁ , C ₂ ) that have undergone the heating step are introduced into the pair of pressing rolls (r ₁ , r _{2) as a whole while sandwiching the constituent material,}

After the thermocompression bonding step, by at least one release roll, the release material (C ₁ , C ₂ ) and the thermoplastic liquid crystal polymer film (F) and/or metal foil (M) in contact with the release material (C ₁ , C ₂₎ Each of these is peeled off, and at least a peeling step in which the adjacent metal foil (M) and the metal foil (M) are peeled is provided.

Here, the number of thermoplastic liquid crystal polymer films (F) in the constituent material for forming one metal-clad laminate may be singular or plural. Moreover, the metal foil (M) may be singular or plural. In addition, in the case of containing a plurality of, each may be the same or different.

In addition, the constituent material of the metal-clad laminate unwound from the unwinding roll may be a single body of the thermoplastic liquid crystal polymer film (F) and the metal foil (M), and one side of the thermoplastic liquid crystal polymer film (F) and the metal foil (M). It may be a metal-clad laminate (M)/(F). Therefore, (i) a thermoplastic liquid crystal polymer film (F) is wound on a plurality of unwinding rolls for unwinding a constituent material for forming a plurality of metal clad laminates composed of a thermoplastic liquid crystal polymer film (F) and a metal foil (M). A unwinding roll for unwinding, (ii) an unwinding roll for unwinding the metal foil (M), and/or (iii) a unwinding roll for unwinding the single-sided metal-clad laminate (M)/(F) may be included.

In addition, the obtained metal-clad laminate may be the same or different.

Each unwinding roll is arrange|positioned so that the following conditions may be satisfied, for example.

(I) From the constituent materials of the plurality of metal-clad laminates, a plurality of metal-clad laminates (one-sided metal-clad laminates and/or double-sided metal-clad laminates) are formed, and adjacent metal-clad laminates are each Adjacent through metal foil.

_{(Ii) A release member (C 1} , C ₂ ) unwound from a pair of release member unwinding rolls sandwiches the entire constituent material, that is, a release member (C ₁ ) and a release member (C ₂ ) each form an outermost layer. do.

A releasing member in the heating step of (C _1, C _2), a releasing member (C _1, C ₂₎ a not particularly limited to heat, heating the releasing member (C _1, C ₂₎ by an external heating means such as a heater You may heat the mold release materials (C ₁ , C ₂ ) by a heating roll formed separately from the pressure rolls (r ₁ , r _{2 ).} Alternatively, the release members (C ₁ , C ₂ ) may be heated by externally contacting the release members (C ₁ , C ₂ ) to the pressure rolls (r ₁ , r _{2 ).}

In the heating step, by heating the release members C ₁ and C _{2 in} advance, the moisture of the release member can be removed, and the difference in the coefficient of thermal expansion between the release member and the constituent material can be reduced. _{In addition, by using a release material (C 1} , C ₂ ) that has undergone a heating process, the constituent materials are entirely sandwiched between the constituent materials in a state in which the metal foils are adjacent to each other, thereby preventing heat from being radiated to the metal foil at once. Peeling can be facilitated.

The heating process may be judged based on the thermocompression bonding temperature. For example, when the thermocompression bonding temperature is T°C, the temperature of the heating process may be, for example, T-10°C or higher, and T-5 It may be higher than or equal to C. In addition, it is preferable that it is lower than the thermocompression temperature, and the upper limit may be less than T deg.

In the heating process, depending on the heating means, the heating time can be appropriately set, but for example, the moisture content of the mold release material is within a predetermined range (e.g., 1100 ppm or less, 900 ppm or less, 700 ppm or less, or 400 ppm or less. It is preferable to heat in the range of ).

Hereinafter, a specific embodiment will be described with reference to the drawings. 1 is a schematic side view for explaining a method of manufacturing a metal-clad laminate according to a first embodiment.

In the production method of the present invention, a pair of release material unwinding rolls 11 and 11 for unwinding a release material _{(C 1} , C ₂ ) on the upstream side of a _{pair of pressure rolls (r 1} , r _{2 ), a thermoplastic liquid crystal} A plurality of thermoplastic liquid crystal polymer film unwinding rolls 12 and 12 for unwinding the polymer film F, and a plurality of metal foil unwinding rolls 13 and 13 for unwinding the metal foil M are prepared.

Here, as shown in FIG. 1, in the first embodiment, the thermoplastic liquid crystal polymer film (F), the metal foil (M), the releasing member (C ₁ ), and the releasing member (C ₂ ) are a pair of pressing rolls (r _{1 ).} , r ₂ ), each unwinding roll is in the order of (r ₁ )/(C ₁ )/(F)/(M)/(M)/(F)/(C ₂ )/(r ₂₎ Is placed.

Specifically, on the upstream side of a pair of pressurizing rolls (r ₁ , r ₂ ), a pair of release material unwinding rolls 11 and 11 for unwinding the release _{members C 1} and C _{2 are the outermost layers, respectively.} A plurality of thermoplastic liquid crystal polymer film unwinding rolls 12 and 12 are disposed, and a plurality of thermoplastic liquid crystal polymer film unwinding rolls 12 and 12 unwind a thermoplastic liquid crystal polymer film F inside thereof, and a plurality of metal foils for unwinding a metal foil M on the inside thereof The unwinding rolls 13 and 13 are arranged.

As shown in FIG. 1, _{after disposing each unwinding roll with respect to a pair of pressure rolls (r 1} , r ₂ ), from each unwinding roll, as indicated by the arrow direction, a thermoplastic liquid crystal polymer film (F), The metal foil (M) and the mold release materials (C ₁ , C ₂ ) are unwound and introduced into the pair of pressing rolls (r ₁ , r ₂ ) in the MD direction (or lamination direction) indicated by the arrow.

_{Here, a pair of release members (C 1} , C ₂ ) unwound from the release member unwinding rolls 11 and 11 are each of the pair of pressing rolls before being introduced in contact with the constituent material in a pair of pressing rolls. For (r ₁ , r ₂ ), a circumscribed process is performed for a predetermined time.

In the circumscribed step, the release members C ₁ and C ₂ contact the outer periphery of the pressure rolls r ₁ and r ₂ , whereby moisture can be removed from the _{release members C 1} and C _{2. In addition, by reducing the moisture content of the release materials (C 1} , C ₂ ) before contacting the thermoplastic liquid crystal polymer film (F) and the metal foil (M), problems such as bubble marks or poor lamination on the surface of the laminate are prevented. Can be suppressed. In the external process, the starting point of contact with the outer periphery of the pressing roll can be appropriately set according to the size of the pressing roll and the rotational speed of the pressing roll, and from a predetermined starting point, the release materials (C ₁ , C ₂ ) follow the pressing roll. An external process may be performed so that it may be. In addition, circumscribed in this invention means that a mold release material is brought into contact and conveyed so that it may follow the outer periphery of a pressure roll from a predetermined starting point.

The position of the release material unwinding _{roll is not particularly limited as long as a pair of release materials (C 1} , C ₂ ) can contact a pair of pressure rolls (r ₁ , r ₂ ), and the release material unwound from the release material unwinding roll The releasing material may be directly introduced into the pressing roll, or the releasing material unwound from the releasing material unwinding roll may be introduced into the pressing roll after passing through one or a plurality of guide rolls. Therefore, it is preferable to provide a _{pair of guide rolls (g 1} , g ₂ ) for externally contacting a pair of release members with respect to a pair of pressing rolls.

For example, as shown in FIG. 1, a pair of release members (C ₁ , C ₂ ) is taken out from the release member unwinding rolls 11 and 11 and then directly introduced into the _{pressing rolls (r 1} , r _{2 ).} Rather, it _{passes through the guide rolls 14 and 14 arranged in the vicinity of the pressing rolls r 1} and r ₂ , and then from the guide rolls 14 and 14 to a pair of pressing rolls r ₁ and r ₂ . It may be introduced. With the guide rolls 14 and 14, a pair of release members C ₁ and C ₂ can be circumscribed to _{a desired location of the pair of pressing rolls r 1} and r _2.

The installation point of the guide roll _{is not particularly limited as long as it can circumscribe a pair of release members (C 1} , C ₂ ) to a pair of pressure rolls (r ₁ , r ₂ ), and in FIG. 1, the guide roll is It is arranged in the vicinity of the pressure roll, but may be in contact with the pressure roll.

For example, in Figure 1, the external before the thermocompression bonding, a releasing member (C ₁₎ a pressure roll (r _1), a releasing member (C ₂₎ a pressure roll (r _2). In this way, by circulating (or enclosing) the release member on the pressing roll, moisture contained in the release member can be removed, and the release member can be preheated to the vicinity of the thermocompression bonding temperature in advance. The distance at which the mold release member circumscribes to the pressure roll can be appropriately set, but may be, for example, 1/8 week or more, 1/4 week or more, or 1/2 week or more of the pressure roll.

The time between the release material and the pressure roll can be appropriately set according to various conditions such as the type of the release material, the state of the release material, and the heating temperature of the pressure roll, but from the viewpoint of removing moisture from the release material, the release material is externally contacted with the pressure roll. It is preferable that the time is, for example, 1.0 second or longer, and may be, for example, 1.0 to 200 seconds, or 3.0 to 125 seconds.

In addition, the circumscribed time may be appropriately set by estimating the point in time when the moisture content of the mold release material reaches a predetermined range (eg, 1100 ppm or less, 900 ppm or less, 700 ppm or less, or 400 ppm or less).

Before the mold release material (C ₁ , C ₂ ) is pressed by the pressure roll, it is preferable to externally contact the pressure roll so that the temperature is higher than T-15° C. with respect to the heating temperature T° C. of the pressure roll. In addition, the temperature of the mold release material before being pressurized by the pressing roll may be T-10°C or higher, T-5°C or higher, and may be lower than the heating temperature.

One pair of release materials (C ₁ , C ₂ ) is, after the circumscribed step, sandwiching the constituent material of the metal-clad laminate composed of the thermoplastic liquid crystal polymer film (F) and the metal foil (M) as its outermost layer, Is introduced into a pair of pressing rolls (r ₁ , r _{2 ).}

For example, in FIG. 1, a pair of release members (C ₁ , C ₂ ) is a pair of pressing rolls (F)/(M)/(M)/(F) sandwiched between them. It is introduced in _{r 1} , r _{2 ).}

In a pair of pressurizing rolls, a laminate composed of a thermoplastic liquid crystal polymer film (F) and a metal foil (M) containing a _{pair of release materials (C 1} , C _{2 ) as an outermost layer, that is, (C 1} )/( For F)/(M)/(M)/(F)/(C ₂ ), pressure is applied at a predetermined heating temperature.

As the pressurizing roll, a known heating pressurizing device can be used. In addition, there are no particular restrictions on the thermocompression bonding temperature or the pressure conditions of the pressurization roll, but in order to favorably bond the thermoplastic liquid crystal polymer film and the metal foil, for example, with respect to the melting point (Tm) of the thermoplastic liquid crystal polymer film, the thermocompression bonding temperature Is, for example, may be in the range of (Tm-20) to (Tm + 20)°C, and preferably (Tm-15) to (Tm + 5)°C.

In addition, the pressurizing pressure may be in the range of 10 t/m (98 kN/m) to 1.5 t/m (14.7 kN/m), preferably 5 t/m (49 kN/m) to 1.0 t/m ( 9.8 kN/m). In addition, the pressing pressure is a value obtained by dividing the force (compression load) applied to the pressing roll by the effective width of the pressing roll.

In the method for producing a metal-clad laminate of the present invention, with at least one release roll, the release members (C ₁ , C ₂ ), and the thermoplastic liquid crystal polymer film (F) in contact with the release members (C ₁ , C _{2 ), and} / Or the metal foil (M) is peeled, respectively, and the said adjacent metal foil (M) and the metal foil (M) are peeled.

In the peeling step, peeling between the mold release material and the thermoplastic liquid crystal polymer film and/or metal foil in contact with the mold release material, and peeling between the adjacent metal foil (M) and the metal foil (M) may be performed at the same time, or stepwise peeling is performed. You may do it.

The peeling process can be performed by a known or commonly used method. For example, in the peeling process, with at least one peeling roll, (i) a release material (any of C ₁ , C ₂ ) and a release material Peeling of the contacting thermoplastic liquid crystal polymer film (F), (ii) peeling of the mold release material ( _{any of C 1} , C ₂ ) and the metal foil (M) in contact with the mold release material, (iii) the adjacent metal foil (M) and the metal foil ( At least any one of peeling of M) may be performed. The order of the above (i), (ii) and (iii) is not particularly limited, and a plurality of them may be performed simultaneously or may be performed stepwise.

Further, the at least one release roll may be a pair of release rolls, may be a plurality of release rolls disposed alone, or a combination of these. In addition, the order of the release roll may be appropriately set, and any may be on the upstream side.

For example, you may pass between a pair of peeling rolls, and you may implement said (i), (ii), and (iii) at once.

Alternatively, it may pass between a pair of release rolls, and any two of (i), (ii), and (iii) may be performed at once, and the remaining peeling may be performed step by step with a single release roll. , Peeling may be performed step by step with a single peeling roll, and then the remaining peeling may be performed by passing between a pair of peeling rolls.

For example, in the case of performing peeling in stages, peeling between (M)/(M) which is a metal foil is performed as the first peeling step, and successively or at the same time, _{between (C 1} )/(F), ( You may perform at least one peeling process selected between F)/(C ₂ ), (C ₁ )/(M), and (M)/(C _{2 ).} When performing the peeling process between metal foils for the first time, heat can be rapidly released from the metal foils, and as a result, the cooling rate of the laminate during the peeling process can be accelerated.

Alternatively, in the case of stepwise peeling, the release materials (C ₁ , C ₂ ) and the thermoplastic liquid crystal polymer film (F) and/or the metal foil (M) in contact with the release materials (C ₁ , C _{2) are separated from each other.} , That is, selected _{between (C 1} )/(F), (F)/(C ₂ ), (C ₁ )/(M), and (M)/(C ₂ ), at least one Peeling may be performed as the first peeling step. Subsequently or at the same time, the remaining peeling step may be performed as necessary.

In the present invention, since the release material is disposed on the outermost layer, the release material can be very easily peeled off. As a result, it is possible to suppress the occurrence of wrinkles that tend to occur when peeling is difficult, and a high-quality metal-clad laminate can be manufactured with good productivity.

For example, in the first embodiment shown in FIG. 1, the laminate (C ₁ )/(F)/(M)/(M)/(F)/(C ₂ ) is the release rolls 15 and 15 By passing through, it _{is peeled between (C 1} )/(F), (F)/(C ₂ ), and between (M)/(M), thereby producing two single-sided metal-clad laminates (MF). The peeled release materials (C ₁ , C ₂ ) are wound up by the release material take-up rolls 16 and 16, respectively. Since the peeled mold release material (C ₁ , C ₂ ) is suppressed from contamination by the low molecular weight thermoplastic liquid crystal polymer, it can be reused if necessary. Moreover, the obtained metal-clad laminate is wound up by the metal-clad laminate take-up rolls 17 and 17, respectively.

In addition, as shown in FIG. 2, in the second embodiment, the thermoplastic liquid crystal polymer film (F), the metal foil (M), the releasing member (C ₁ ), and the releasing member (C ₂ ) are a pair of pressing rolls (r ₁ , r ₂ ) between, (r ₁ )/(C ₁ )/(F)/(M)/(M)/(F)/(M)/(M)/(F)/(C ₂ )/( Each unwinding roll is arranged in the order of r _{2 ).} Here, members having the same role as in Fig. 1 are denoted by the same reference numerals, and descriptions thereof are omitted.

In the second embodiment shown in Fig. 2, (C ₁ )/(F)/(M)/(M)/(F)/(M)/ _{between a pair of pressing rolls (r 1} , r ₂₎ (M)/(F)/(C ₂ ), the laminated body is _{peeled between (C 1} )/(F), (F)/(C ₂ ) and (M)/(M) , Two single-sided metal-clad laminates (M)/(F) (hereinafter, MF or FM may be omitted) and one double-sided metal-clad laminate (M)/(F)/(M) (hereinafter, (May be omitted by MFM) is manufactured.

In addition, as shown in FIG. 3, in the third embodiment, the thermoplastic liquid crystal polymer film (F), the metal foil (M), the releasing member (C ₁ ), and the releasing member (C ₂ ) are a pair of pressing rolls (r ₁ , r ₂ ) between, (r ₁ )/(C ₁ )/(M)/(F)/(M)/(M)/(F)/(M)/(C ₂ )/(r ₂ ) Each unwinding roll is arranged in order. Here, members having the same role as in Fig. 1 are denoted by the same reference numerals, and descriptions thereof are omitted.

In the third embodiment shown in Fig. 3, (C ₁ )/(M)/(F)/(M)/(M)/(F)/ _{between a pair of pressing rolls (r 1} , r ₂₎ (M)/(C ₂ ), the laminated body is _{peeled between (C 1} )/(M), (M)/(C ₂ ) and (M)/(M), A metal clad laminate (MFM) is prepared.

In addition, as shown in FIG. 4, in the fourth embodiment, the thermoplastic liquid crystal polymer film (F), the metal foil (M), the releasing member (C ₁ ), and the releasing member (C ₂ ) are a pair of pressing rolls (r ₁ , r ₂ ) between, (r ₁ )/(C ₁ )/(M)/(F)/(M)/(M)/(F)/(M)/(M)/(F)/(M Each unwinding roll is arranged in the order of )/(C ₂ )/(r _{2 ).} Here, members having the same role as in Fig. 1 are denoted by the same reference numerals, and descriptions thereof are omitted.

In the fourth embodiment shown in FIG. 4, between a pair of pressure rolls r ₁ and r ₂ , (C ₁ )/(M)/(F)/(M)/(M)/(F)/ (M)/(M)/(F)/(M)/(C ₂ ) are stacked _{between (C 1} )/(M), (M)/(C ₂ ) and (M) It is peeled between /(M), and three double-sided metal-clad laminates (MFM) are produced.

In addition, as shown in FIG. 5, in the fifth embodiment, the single-sided metal-clad laminate (MF) (FM) of the metal foil (M) and the thermoplastic liquid crystal polymer film (F), the metal foil (M), and the mold release material (C ₁₎ ) And the release material (C ₂ ), in the thermocompression bonding, _{between a pair of pressing rolls (r 1} , r ₂ ), (r ₁ )/(C ₁ )/(M)/(F)/(M) Each unwinding roll is arranged in the order of /(M)/(F)/(M)/(C ₂ )/(r _{2 ).} Here, the single-sided metal-clad laminate MF is unwound from the unwinding roll 18. In addition, members having the same role as in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

In the fifth embodiment shown in Fig. 5, (C ₁ )/(M)/(F)/(M)/(M)/(F)/ _{between a pair of pressing rolls r 1} and r ₂ (M)/(C ₂ ), the laminated body is _{peeled between (C 1} )/(M), (F)/(C ₂ ) and (M)/(M), A metal clad laminate (MFM) is produced.

Further, if necessary, a cooling roll for cooling the laminate that has passed through the _{pair of pressing rolls r 1} and r _{2 may be provided on the downstream side of the pressing roll.} For example, when a high-temperature laminate is transported, wrinkles due to tension may occur and wave spatter may occur. Therefore, the Tg of the thermoplastic liquid crystal polymer film by slow cooling the laminated product after lamination with a cooling roll at 30°C. You may cool it below (80 degreeC or less). It is preferable that the cooling roll is provided between the pressure roll and the release roll. The cooling roll may be composed of a pair of rolls, or may be composed of one single roll.

As an example, for example, in FIG. 6, a schematic side view for explaining a modified example in which the peeling step is modified in the first embodiment is shown. As shown in FIG. 6, cooling rolls 19 and 19 _{are provided on the downstream side of a pair of pressure rolls r 1} and r ₂ , and a plurality of release rolls 25 and 25 ′ are in the direction of lamination progression. It is installed in a different place. The laminated body heat-compressed with a pair of pressure rolls (r ₁ , r ₂ ) is then slowly cooled through cooling rolls 19 and 19. By then peeling rolls (25 '), (F) / (C 2) , and between the (M) / (M) is peeled off from between the one-side metal clad laminate (MF) has been manufactured and then, a peeling roll By (25), it _{peels between (C 1} )/(M), and a single-sided metal-clad laminate (MF) may be produced.

As another example, for example, in FIG. 7, a schematic side view for explaining a modified example in which the peeling step is modified in the first embodiment is shown. As shown in FIG. 7, _{the laminated body heat-compressed by a pair of pressing rolls (r 1} , r ₂ ) is first passed through the release rolls 15 and 15, thereby It is peeled off and _{divided into laminates (MFC 1} ) and (MFC ₂ ), and then each laminate passes through the second release rolls 25 and 25', respectively _{, between (F)/(C 1} ) and ( It peels between F)/(C ₂ ), and you may finally manufacture two single-sided metal-clad laminates (MF).

As long as the peeling step can be performed, the peel strength between the mold release material and the thermoplastic liquid crystal polymer film after thermocompression bonding, the peel strength between the mold release material and the metal foil, and the peel strength between the metal foil and the metal foil may be appropriately set. Here, the peeling strength is a peeling strength (peeling strength) measured in conformity with JIS C5016-1994 (peeling in the 90° direction).

For example, the peel strength between the release material and the thermoplastic liquid crystal polymer film after thermocompression bonding is preferably 0.6 kN/m or less, more preferably 0.4 kN/m or less, and still more preferably 0.3 kN/m or less.

For example, the peel strength between the mold release material and the metal foil after thermocompression bonding is preferably 0.3 kN/m or less, more preferably 0.2 kN/m or less, and still more preferably 0.1 kN/m or less.

For example, the peel strength between the metal foil and the metal foil after thermocompression bonding is preferably 0.3 kN/m or less, more preferably 0.2 kN/m or less, and still more preferably 0.1 kN/m or less.

Industrial applicability

According to the manufacturing method of the present invention, a metal-clad laminate can be efficiently produced, and the obtained metal-clad laminate is a component used in the electric/electronic field, office equipment/precision equipment field, power semiconductor field, etc. For example, it can be effectively used as a circuit board (especially a substrate for milliwave radar).

As described above, preferred embodiments of the present invention have been described with reference to the drawings, but those skilled in the art will readily assume various changes and modifications within the apparent range after reading the specification of the present invention. Accordingly, such changes and modifications are construed as within the scope of the invention determined from the claims.

11: release material unwinding roll
12: Thermoplastic liquid crystal polymer film unwinding roll
13: Metal foil unwinding roll
14: guide roll
15, 25, 25': release roll
16: release material winding roll
17: metal-clad laminate winding roll
18: metal-clad laminate unwinding roll
19: cooling roll

Claims (15)

A pair of pressurizing rolls (r ₁ , r ₂ ), a _{pair of release material unwinding rolls for unwinding a release member (C 1} , C ₂ ), a plurality of metals consisting of a thermoplastic liquid crystal polymer film (F) and a metal foil (M) A step of preparing a plurality of unwinding rolls for unwinding a constituent material for forming a coated laminate, and
The plurality of unwinding rolls are arranged so that the constituent material forms at least a state (M)/(M) adjacent to each other, and the pair of release members (C ₁ , C ₂ ) is the constituent material An arrangement process of arranging a release material unwinding roll so as to sandwich the whole,
A heating step in which the pair of release members (C ₁ , C ₂ ) is unwound from a release material unwinding roll and heated respectively,
One pair of release members (C ₁ , C ₂ ) that has gone through the heating process is sandwiched between the constituent materials, and the whole is the pair of pressure rolls (r ₁ , r ₂ ) The thermocompression bonding process introduced into the,
After the thermocompression bonding step, by at least one release roll, the release material (C ₁ , C ₂ ) and the thermoplastic liquid crystal polymer film (F) and/or metal foil (M) in contact with the release material (C ₁ , C ₂₎ A method for producing a metal-clad laminate comprising at least a peeling step in which each of these is peeled off and the adjacent metal foil (M) and the metal foil (M) are peeled off. The method of claim 1,
A method for producing a metal-clad laminate in which the thermoplastic liquid crystal polymer film (F) contacts either or both of the mold release materials (C ₁ , C _{2 ).} The method of claim 1,
A method for producing a metal-clad laminate in which a metal foil (M) contacts any one or both of the mold release materials (C ₁ , C _{2 ).} The method according to claim 1 or 2,
In the thermocompression bonding process, between the pair of pressing rolls (r ₁ , r ₂ ), (r ₁ )/(C ₁ )/(F)/(M)/(M)/(F)/( C ₂ )/(r ₂ ) are stacked in the order of thermal compression,
In the above peeling step, a _{metal-clad laminate is obtained by peeling between (C 1} )/(F), (F)/(C ₂ ) and (M)/(M) to obtain two metal-clad laminates. Manufacturing method. The method according to claim 1 or 2,
In the thermocompression bonding process, between the pair of pressing rolls (r ₁ , r ₂ ), (r ₁ )/(C ₁ )/(F)/(M)/(M)/(F)/( Thermal compression is performed by overlapping in the order of M)/(M)/(F)/(C ₂ )/(r _{2 ),}
In the above peeling step, the _{metal-clad laminate is peeled between (C 1} )/(F), (F)/(C ₂ ) and (M)/(M) to obtain three metal-clad laminates. Manufacturing method. The method according to claim 1 or 3,
In the thermocompression bonding process, (r ₁ )/(C ₁ )/(M)/(F)/(M)/(M)/(F) between the pair of pressing rolls (r ₁ , r ₂₎ )/(M)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,
In the above peeling step, a _{metal-clad laminate is obtained by peeling between (C 1} )/(M), (M)/(C ₂ ) and (M)/(M) to obtain two metal-clad laminates. Manufacturing method. The method according to claim 1 or 3,
In the thermocompression bonding process, (r ₁ )/(C ₁ )/(M)/(F)/(M)/(M)/(F) between the pair of pressing rolls (r ₁ , r ₂₎ )/(M)/(M)/(F)/(M)/(C ₂ )/(r ₂ ) are stacked in the order of thermal compression,
In the above peeling step, the _{metal-clad laminate is peeled between (C 1} )/(M), (M)/(C ₂ ) and (M)/(M) to obtain three metal-clad laminates. Manufacturing method. The method according to any one of claims 1 to 7,
The mold release material (C ₁ ) and/or the _{mold release material (C 2} ) is a mold release material selected from the group consisting of a heat resistant resin film, a heat resistant composite film, and a heat resistant nonwoven fabric. The method according to any one of claims 1 to 8,
In the heating step, the releasing member of the pair (C _1, C ₂₎ is unwound from the releasing member Issues chulrol, respectively, by the circumscribed about the pressure roll (r _1, r ₂₎ of the pair, each of the releasing member is heated A method for producing a metal-clad laminate. The method of claim 9,
In the heating step, the time when the pair of release members (C ₁ , C ₂ ) contacts the pair of press rolls (r ₁ , r ₂ ) by external contact is 1.0 second or more. Manufacturing method. The method of claim 9 or 10,
In addition, having a pair of guide rolls (g ₁ , g ₂ ) for externally contacting the pair of release members (C ₁ , C ₂ ) with respect to the pair of pressing rolls (r ₁ , r _{2 ),} Method for producing a metal clad laminate. The method according to any one of claims 1 to 11,
Further, a method for producing a metal-clad laminate comprising a cooling roll for cooling the laminate that has passed through the pair of pressure rolls (r ₁ , r _{2 ).} The method according to any one of claims 1 to 5 and 8 to 12,
The method for producing a metal-clad laminate, wherein the peel strength between the thermoplastic liquid crystal polymer film (F) and the mold release material (C ₁ ) or the mold _{release material (C 2) after thermocompression bonding is 0.6 kN/m or less.} The method according to any one of claims 1 to 3 and 6 to 13,
A method for producing a metal-clad laminate, wherein the peel strength between the metal foil (M) and the mold release material (C ₁ ) or the mold _{release material (C 2) after thermocompression bonding is 0.3 kN/m or less.} The method according to any one of claims 1 to 14,
The method for producing a metal-clad laminate, wherein the peel strength between the metal foil (M) and the metal foil (M) after thermocompression bonding is 0.3 kN/m or less.

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