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WO2001061083A1 - Fibre a section transversale modifiee et son procede de production - Google Patents

Fibre a section transversale modifiee et son procede de production Download PDF

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Publication number
WO2001061083A1
WO2001061083A1 PCT/JP2001/001195 JP0101195W WO0161083A1 WO 2001061083 A1 WO2001061083 A1 WO 2001061083A1 JP 0101195 W JP0101195 W JP 0101195W WO 0161083 A1 WO0161083 A1 WO 0161083A1
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WO
WIPO (PCT)
Prior art keywords
fiber
polymer
cross
cloth
section
Prior art date
Application number
PCT/JP2001/001195
Other languages
English (en)
Japanese (ja)
Inventor
Akira Ebihara
Teruyoshi Kawada
Sunao Takahira
Mamoru Harada
Masao Morioka
Toshiro Ono
Original Assignee
Kanebo, Limited
Kanebo Gohsen, Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kanebo, Limited, Kanebo Gohsen, Limited filed Critical Kanebo, Limited
Priority to AU2001232349A priority Critical patent/AU2001232349A1/en
Publication of WO2001061083A1 publication Critical patent/WO2001061083A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing

Definitions

  • the present invention relates to a modified cross-section fiber having excellent physical effects such as rubbing for liquid crystal and cleaning for a hard disk, and a method for producing the same. More specifically, the present invention relates to a modified cross-section fiber having a petal-like protrusion in cross-section of a fiber and having at least two edge angles, and a method for producing the same. Background art
  • fibers of various cross-sections have been used in various shapes for clothing and the like, and have been used for polishing because they have a better physical action than round cross-sections, and in recent years also for rubbing cloths.
  • rubbing is an alignment treatment method in which an alignment film covering a transparent electrode on a glass substrate is aligned in a certain direction using a member such as a polishing cloth in a liquid crystal display element manufacturing process.
  • a rubbing cloth a cloth obtained by raising the woven fabric surface of synthetic fibers of nylon or polyester, chemical fibers such as rayon, or natural fibers such as cotton has been generally used.
  • the conventional rubbing cloth is made by raising a large number of fibers, and the alignment film is rubbed at the fiber tip or at the fiber side close to the tip. The fiber diameter was too large to obtain a fine orientation.
  • JP-A-62-269932, JP-A-02-198420 and the like attempt to obtain fine orientation using ultrafine fibers.
  • JP-A-56-97319, JP-A-6-469692, and JP-A-2772837 disclose attempts to obtain fine orientation using not-fine fibers but irregular-shaped fibers.
  • irregular cross-section fibers Japanese Patent Publication No. 39-29636 and Japanese Patent Publication No. 60-24845 disclose a fiber having a sharp edge by division, and Japanese Patent Application Laid-Open No. 279897 discloses a tooth profile. A cross-section fiber is disclosed.
  • hard disk cleaning that is, cleaning treatment for removing fine dust and impurities adhering to the disk surface using a cloth and a liquid in the hard disk manufacturing process
  • natural fibers such as cotton, nylon or polyester.
  • Fabrics, liquids, etc., of non-synthetic cross-section ultrafine synthetic fibers, such as fabrics, nonwoven fabrics, flocky, etc. are generally used.
  • ultrafine fibers are often used in response to fine dust .
  • the fiber having a sharp edge as disclosed in Japanese Patent Publication No. 39-29636 and Japanese Patent Publication No. 60-24845 is not a multilobal fiber but a triangular shape of the divided fiber. Therefore, there is little contact between the edge of the portion that comes into contact with the material to be rubbed and the alignment film, and a precise rubbing effect cannot be expected.
  • Japanese Patent Application Laid-Open No. 279897 discloses a multi-lobed filament from which the easily soluble component has been removed. No rubbing effect requiring physical action cannot be expected because there is no clear disclosure.
  • the present invention solves the above-mentioned problems by providing excellent effects of ultrafine fibers and physical effects due to irregular cross-sections.
  • a rubbing cloth that performs fine, dense, and homogeneous orientation, and fine dust that is firmly attached
  • the present invention requires the following configuration.
  • the present invention provides a fiber cross-sectional shape comprising a central portion and a shape obtained by combining 5 to 30 petal-like projections which are continuous with the central portion and extend radially from the center toward the outer periphery of the fiber.
  • the length from the base to the tip of the petal is 3 to 45% of the maximum outer diameter of the fiber, and each petal has at least two edges of 45 to 115 degree angle. It is a cross section fiber.
  • a rubbing cloth which is a cloth used for rubbing for liquid crystal alignment, wherein the rubbing cloth uses the irregular cross-section fiber in a portion in contact with a rubbing material.
  • it is a cloth used for cleaning a hard disk, and is a cleaning cloth using the irregular cross-section fiber in a portion in contact with a disk material.
  • the composite fiber is composed of at least two polymers, and one of the two polymers is a polymer having higher solubility than the other polymer, and the cross-sectional shape of the composite fiber is The polymer with low solubility is located almost at the center, and the polymer with high solubility forms 5 to 30 independent segments exposed on the outer periphery of the conjugate fiber.
  • the bonding ratio between a polymer with a low solubility and a polymer with a high solubility is It is a composite fiber characterized by a ratio of 1: 2 to 9: 1.
  • the modified cross-section fiber according to the present invention can be produced by subjecting the conjugate fiber to conjugate spinning, and then dissolving and removing a polymer having high solubility.
  • FIG. 1 is a plan view showing an example of a cross-sectional shape of a fiber constituting a rubbing cloth of the present invention.
  • FIG. 2 is a view showing an example of a petal-like projection in a cross-sectional shape of a fiber constituting a rubbing cloth of the present invention.
  • FIG. 3 is a view showing an example of a petal-like projection in a cross-sectional shape of a fiber constituting the rubbing cloth of the present invention.
  • FIG. 4 is an example of a cross-sectional view of a conjugate fiber used in the production of the present invention.
  • FIG. 5 is an example of a cross-sectional view of a conjugate fiber outside the present invention.
  • FIG. 6 is a schematic view of a raised cloth for a liquid crystal rubbing cloth using the modified cross-section fiber of the present invention.
  • FIG. 7 is an example of a schematic diagram of a die for spinning the conjugate fiber used in the present invention.
  • FIG. 8 is an example of a schematic diagram of a die for spinning the conjugate fiber used in the present invention, and is a cross section taken along line XX ′ of FIG.
  • FIG. 9 is an example of an electron micrograph of a cross section of a fiber constituting the rubbing cloth of the present invention, showing a cross-sectional shape of the fiber.
  • A is the modified cross-section fiber of the present invention.
  • L1 is the maximum outer diameter
  • L2 is the length from the base to the tip of the petal.
  • E is the edge angle of the petals of the present invention.
  • F is the edge angle of the petal of the present invention.
  • ⁇ is a pile.
  • P is a base cloth.
  • reference numeral 1 denotes an inner core orifice, which is a polymer (b) flow path.
  • 2 is a polymer (a) flow path
  • 3 is a polymer (b) flow path
  • 4 is a conducting hole
  • 5 is an orifice.
  • A is a polymer having high solubility
  • b is a polymer having low solubility.
  • the fiber used in the present invention is a synthetic fiber, and polyester, polyamide, polyolefin and the like are useful.
  • polyester include polyethylene terephthalate, polybutyrene terephthalate, polyethylene naphthalate, polyethylene oxybenzoate, poly 1,4-dimethylcyclohexane terephthalate, polypivalolactone, and copolyesters containing these as main components.
  • polyamide include nylon 6, nylon 66, nylon 1.1, nylon 12, nylon 61, and copolyamides containing these as main components.
  • polyolefin for example, polyethylene, polypropylene and the like are useful. When used for rubbing, polyester, nylon 11 and nylon 12 are preferred. When used for a cleaning cloth, polyester and nylon 6 are preferred.
  • FIG. 1 shows the cross-sectional shape of the modified cross-section fiber of the present invention
  • FIGS. 2 and 3 show an example of the tip of a petal-like projection.
  • the cross-sectional shape of the irregular cross-section fiber in the present invention is continuous with the center portion (A) of the fiber and the center portion (A) of the fiber, that is, a plurality of petal-like projections (B) connected to the center portion (A).
  • Each petal-like projection (B) has a shape extending radially from the center (A) toward the tip of the fiber.
  • each protrusion (B) has at least two edges. That is, each protrusion
  • the starting point of the protrusion which is the overlapping part of the protrusion (B) and the center of the fiber (A) If the two parts are (e) and (f), respectively, and the end points of the outer periphery extending toward the outer periphery of the fiber are (e,) and (f '), respectively, then (e) (e,) and (f)
  • the line connecting (f ') and (e') (f ') on the outer periphery of the protrusion is a straight line or a curve close to a straight line, and (e) (e') (f ') and ( ⁇ ) (f ') (e') is at least two edges.
  • any of (f ') is a curve
  • angle (E) The angle between the tangent s at (e ') to (e') and the line connecting (e ') and (f') to the inside of the projection of the edge is defined as angle (E). . If the line (e ') (f') is a curve, the tangent t at (e ') to the curve (e') (f ') and the line connecting the line (e) (e') Angle (E) is the angle of the edge projection toward the inside. Line (e) (e ') and line
  • the tangent s at (e ') to the curve (e) (e') and the curve (e ') (f') Let the angle (E) be the inward angle of the protrusion of the edge with the tangent t at (e '). Similarly, if the angle (F) is a curve, its tangent is used for calculating the angle.
  • (G) may be V-shaped or U-shaped.
  • the central portion of the cross-sectional shape may have a hollow portion.
  • the length (L2) from the base to the tip of each petal-like projection on the fiber section of the rubbing material to be raised or on the fiber cross section of the fabric of the cleaning cloth is 3 to 45 times the maximum fiber outer diameter (L1). %, And by specifying the ratio of (L 2) and (L 1) in this way, it is possible to increase the rubbing effect without breaking down the hair, and to suppress the deviation of the fibers in the woven fabric and provide a strong It can demonstrate cleaning power.
  • the length (L 2) from the center to the tip of each petal on the fiber cross section means the length between (e) and (e ') or the length between (f) and (f') I do.
  • the starting point of the projection which is the overlapping portion of the projection (B) and the center (A) of the fiber, is used as the base, and the curve connecting the starting points is used as the center.
  • the number of the petals of the present invention needs to be 5 to 30, preferably 5 to 10. If the number of petals is less than 5, the number of edges is small, and precise orientation cannot be obtained even when rubbing is performed. In addition, the capture of fine dust is reduced, and a sufficient cleaning effect cannot be obtained. If the number is more than 30, the interval between the projections becomes narrow, and a precise orientation cannot be obtained even when rubbing is performed. Also, the petals become too small, and the petals are crushed by friction during cleaning.
  • the maximum outer diameter (L 1) of the modified cross-section fiber fiber of the present invention is preferably 7 to 30 m when used for a rubbing cloth.
  • the maximum outer diameter is in this range, an optimum pile density for rubbing is obtained, hair is hardly broken down, and a dense orientation is obtained at the time of rubbing. That is, the length is preferably 7 m or more from the viewpoint that hair is hard to fall, and is preferably 30 m or less from the viewpoint that an optimum pile density is obtained and a dense orientation is obtained.
  • the fiber of the present invention is used for a rubbing cloth, it is preferably used, for example, for a pile portion of a pile-like structure as shown in FIG.
  • the pile's filament density is preferably 20,000 to 50,000 filaments / cm 2
  • the pile length is preferably l to 3 mm.
  • the angle between the base fabric and the pile is not particularly limited, but is preferably 60 to 120 degrees.
  • the type of the base fabric to be used is not a problem as long as it is an ordinary woven or knitted fabric, but a woven fabric is preferable in view of dimensional stability.
  • a conductive fiber in which a conductive component is kneaded into a pile or a base cloth to make a base cloth with excellent antistatic properties, or combine the fiber used for the base cloth with polyester and a low-melting polyester to heat-treat the low-melting polyester. It is also good to dissolve and glue the base of the pile to prevent the hair from falling down.
  • the fiber of the present invention When used for a cleaning cloth, it is preferably used for the weft portion of a satin woven fabric.
  • the weft and filament density is between 100 and 100 Lament Z cm is preferred.
  • the maximum fiber outer diameter (L 1) is preferably 7 to 30 // m.
  • the maximum outer diameter is in this range, an optimum weft density for a cleaning cloth can be obtained, a sufficient grinding effect can be obtained, and fine dust can be efficiently cleaned. That is, 7 m or more is preferable from the viewpoint of obtaining a strong grinding effect, and 30 m or less is preferable from the viewpoint of increasing the weft density and increasing the efficiency of cleaning fine dust.
  • a composite fiber comprising a plurality of polymers having different solubilities in a solvent is used, and at least two edges are obtained by dissolving a polymer having a solubility in a dog.
  • a fiber having an irregular cross section is produced.
  • the conjugate fibers used in the present invention must have different solubility in a solvent.
  • a description will be given using a composite fiber composed of two types of fiber-forming polymers, wherein one of the two types of polymers is composed of a polymer that is easily dissolved in water or an aqueous solution of Alcali.
  • polymer having low solubility examples include polyester, polyamide, and polyolefin. When used for rubbing, polyester, nylon 11 and nylon 12 are preferred. When used for a cleaning cloth, polyester and nylon 6 are preferred.
  • a copolymer polyester having a high hydrolysis rate for example, a polyethylene terephthalate copolymerized with dicarbonic acid having a polyalkyleneglycol / metal sulfonate group is useful.
  • other polymers Water-soluble (including hot water-soluble) polymers are also preferred because of their versatility.
  • Polyoxyethylene, polyvinyl alcohol, water-soluble polyamide and the like are useful as the water-soluble polymer.
  • Polyoxyethylene having a relatively large molecular weight for example, 100,000 or more, particularly preferably 500,000 or more is often preferable, and polypinyl alcohol having a melting point of about 150 to 180 ° C. is preferable. .
  • water-soluble polyamide examples include a polyamide comprising a carboxylic acid and a diamine in which one or both ends of a piperazine ring are alkylaminated, and a polyamide obtained by copolymerizing a lactam and the like.
  • a polyamide composed of N, N'bisaminopropylpyrazine and adipic acid is preferable because it is soluble in hot water.
  • the bonding ratio between the polymer having low solubility and the polymer having high solubility is 1: 2 to 9: 1. If the ratio of the polymer having higher solubility than 1: 2 is large, the center of the polymer becomes small and the hair falls down, and the rubbing effect is not sufficient. If the ratio of the polymer is large, a rubbing effect cannot be sufficiently obtained because a necessary and sufficient depth and a dense alignment groove are not formed to align the liquid crystal in rubbing.
  • the viscosity ratio during melting of the polymer having high solubility and the polymer having low solubility at the time of melt spinning is preferably 0.5 to 2.0. Preferably it is 0.7 to 1.8.
  • Such a viscosity ratio can be measured by the ratio of the reciprocal of the MI value of a polymer having high solubility and the reciprocal of the MI value of a polymer having low solubility measured at a temperature equal to the melt spinning temperature. The measurement of such MI value is defined by the following method.
  • the Ml value is defined by the following equation.
  • the polymer having low solubility after removing the soluble dog polymer can be provided with an edge of 45 to 115 degree angle, If it is less than 5, the edge angle will exceed 115 degrees, and if it exceeds 2.0, the edge angle may be less than 45 degrees.
  • the conjugate fiber of the present invention uses a combination of the above-mentioned polymers and has a specific shape described below.
  • FIG. 4 shows an example of a cross section of the composite fiber of the present invention.
  • H indicates a polymer having low solubility
  • I indicates a polymer having high solubility
  • the polymer having low solubility is a fiber-forming polymer
  • the polymer having high solubility is a polymer which is a fiber-forming polymer and is easily dissolved in water or an aqueous alkaline solution.
  • the polymer with low resolvability is continuous to the center of the single yarn, that is, a core segment connected to the center and having a petal-like projection at the tip.
  • the polymer with high solubility is composed of segments that are exposed from the outer periphery of the fiber to the inside of the fiber, and the number of segments is 5 to 30 and each segment exists independently of each other. And discontinuous.
  • the core segment, a polymer having low solubility separates each segment of the polymer having high solubility.
  • the maximum outer diameter of the conjugate fiber of the present invention is 7 to 30 when used for a rubbing cloth. m is preferred. When used for a cleaning cloth for a hard disk or the like, the diameter is preferably 30 to 30 m.
  • conjugate fiber of the present invention Weaving or knitting is performed using the conjugate fiber of the present invention, and substantially all of the soluble dog polymer is dissolved and removed to obtain the above-described rubbing cloth and cleaning cloth of the present invention. Further, the conjugate fiber of the present invention can be used as a stable, processed into a non-woven fabric and dissolved and removed easily soluble components.
  • the atypical cross-section fiber of the present invention since the atypical cross-section fiber of the present invention has a plurality of petal-like projections and each petal-like projection has two or more corner edges, the portion of the fiber that comes into contact with the alignment film is the petal projection. Finer, denser and more uniform alignment can be obtained because the film is thinner by the number of layers and the edge surface has a high alignment regulating force. Further, by specifying the ratio of the length from the base to the tip of each petal-shaped protrusion of the fiber and the maximum outer diameter of the fiber, the stability of the single fiber itself is obtained, and the brushed fabric is uniform without falling down. And a fine and dense orientation action can be produced.
  • the fiber of the present invention when used for a cleaning cloth, since the atypical cross-sectional fiber of the present invention has a plurality of petals and each petal has two or more corner edges, Petals with a thickness equivalent to ultrafine fibers and with two or more sharp edges are not only fixed to the core of the filament, but also adjacent to each other.
  • the filaments in the fabric structure and thus the petal-like protrusions By preventing the filaments in the fabric structure and thus the petal-like protrusions from shifting, the grinding effect of the sharp wedges of the petal-like protrusions is effectively exerted, and sufficient cleaning is carried out even for fine dust adhered firmly. It is effective.
  • Polyethylene terephthalate (hereafter referred to as polymer P1) with an intrinsic viscosity of 0.64 measured with a mixed solution of phenol and tetrachlorene 6: 4 (weight ratio) at 20 ° C, an intrinsic viscosity of 0.688, and softening
  • polymer P2 polyethylene glycol copolymer having a temperature of 244.5 ° C and an alkali-soluble property was prepared.
  • the polymer P2 was dried to a moisture content of 54 ppm.
  • the MI values of the dried polymers PI and P2 at 290 ° C were 2.55 and 1.44, respectively.
  • Fig. 4 shows a cross-sectional view.
  • Example 2 Except that the capacity ratio was changed to PlZPZ-l0Z1, the same method as in Example 1 was used. A multifilament of a composite fiber of 1.1 cite xZ50 f was obtained. Let E be the sample name.
  • a multifilament multifilament of 111.1 dtex x50f was obtained in the same manner as in Example 1, except that the moisture content of the polymer P2 after drying was 194 ppm. Let F be the sample name.
  • Example 4 Example 4)-Nylon 6 (hereinafter referred to as polymer P3) having a relative viscosity of 2.51 and polymer P2 were prepared.
  • the polymer P2 was dried to a moisture content of 67 ppm.
  • polymer P 3 is melted at 270 ° C and polymer P 2 at 273t: using separate screw extruders, and then pumped.
  • 3? 2 371 (volume ratio), extruded into a die pack as shown in Fig. 7 and Fig.
  • Polyethylene terephthalate having an intrinsic viscosity of 0.64 as measured with a mixed solution of phenol and tetrachloroethane 6: 4 (weight ratio) at 20 ° C is melted with a 295 ° C screw extruder and metered and extruded with a gear pump. Guide to a 290 ° C yarn pack for irregular cross-section yarn, extrude from the orifice, wind at 1152m / min, then stretch 3.27 times with an 85 ° C hot-hole, and heat at 150 ° C And heat-treated to obtain 83.3 dtex / 36 mm multifilament. Let the sample name be ⁇ . Fig. 5 shows the cross-sectional view.
  • Example 1 83.3 dtex / 24 f core-sheath composite fiber composed of polyester for the core and low-melting polyester for the sheath is used for the warp of the ground yarn constituting the base fabric.
  • the weft was composed of a core-sheath composite fiber of 55.5 dtex / 12 f and a conductive composite fiber of 22.2 dtex / 6 f.
  • Velvet fabric was produced using twisted yarn.
  • the resulting woven fabric is subjected to alkali reduction at 95 ° C for 20 minutes using a 1% aqueous sodium hydroxide solution to dissolve and remove the highly soluble polymer, and heat-treated to form a rubbing cloth.
  • a rubbing treatment was applied to the polyimide film for liquid crystal.
  • the cross section of the fiber of the obtained pile was photographed by an electron microscope, and the cross section was measured.
  • An electron micrograph of Example 1 is shown in FIG.
  • Example 2 fine, dense, and uniform alignment grooves could be formed in the applied polyimide film as the rubbing member.
  • Example 3 in which the number of petals was increased to 16, a good rubbing effect was obtained, but in Comparative Example 1 in which the number of petals was increased to 32, the nurturing of the raised portion was not observed, but the space between the petals was narrow. As a result, sufficient alignment grooves could not be formed.
  • Comparative Example 2 in which the length of the petals was 2.6%, the length of the petals was too short to form a sufficient alignment groove.
  • Example 5 Using the conjugate fiber obtained in Example 1 for the weft, polyester for the warp, weaving five satin woven fabrics, using a 1% aqueous sodium hydroxide solution at 95, and reducing the alkali for 20 minutes After dissolving and removing the polymer with high solubility by carrying out, a woven fabric with a warp density of 120 threads Z 2.5 cm (120 threads Z inch) and a weft density of 150 threads / 2.5 cm (150 threads / inch) I got The obtained woven fabric was slit at a width of 40 mm in the warp direction, and then wound into a roll to obtain a tape-shaped cleaning cloth.
  • the maximum outer diameter of the obtained fiber was 14.2 rn
  • the number of petals was 8
  • the ratio of the length from the base to the tip of the petal to the maximum outer diameter of the fiber (L2ZL1) was 2 '. 4.4%
  • edge angle was 85 degrees.
  • Example 4 When the conjugate fiber obtained in Example 4 was used as a cleaning cloth in the same manner as in Example 5, fine edges of the obtained weft fibers acted, and an excellent cleaning effect was obtained.
  • the maximum outer diameter of the obtained fiber was 15.4 / m
  • the number of petals was 8
  • the ratio of the length from the base to the tip of the petal to the maximum outer diameter of the fiber (L2 / L1) was 22.2% and the edge angle was 88 degrees.
  • the fiber obtained in Comparative Example 4 was treated in the same manner as in Example 5 except for the weight loss step.
  • fine dust on the hard disk could not be removed because the number of petals was small and there were no sharp edges.
  • the irregular shaped fiber of the present invention can impart fine and uniform orientation to the material to be wrapped by performing rubbing using a liquid crystal rubbing cloth. It can also be used for hard disk cleaning to remove fine dust. In addition, it can be applied to polishing, wiping cloth, texture cloth, medical use, clothing use, etc., where the edge is effective.
  • such a modified cross-section fiber can be industrially manufactured stably.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

La présente invention concerne une fibre à section transversale modifiée caractérisée en ce que l'on donne sa forme à la section transversale de la fibre en associant un élément central à entre 5 et 30 saillies en forme de pétales de fleurs continues s'étendant radialement de l'élément central en direction de la périphérie extérieure de la fibre, en ce que la longueur depuis la base jusqu'à l'extrémité de la pointe de chaque saillie en forme de pétale est comprise entre 3 et 45 % du diamètre extérieur maximum de la fibre, et en ce que chaque saillie en forme de pétale présente au moins deux bords dont les angles sont compris entre 45 et 115 degrés. La fibre à section transversale modifiée présentes d'excellentes propriétés en terme d'effet de fibres très fines et d'effet physique en raison de sa section transversale modifiée. Elle peut être appliquée par exemple à un chiffon de frottement finement et uniformément orienté, à un chiffon de nettoyage, ou à un chiffon d'essuyage ou un chiffon texturé pouvant enlever les amas de poussière fine fortement déposés. En outre, cette invention concerne le procédé de fabrication de cette fibre.
PCT/JP2001/001195 2000-02-21 2001-02-20 Fibre a section transversale modifiee et son procede de production WO2001061083A1 (fr)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003049589A1 (fr) * 2001-12-12 2003-06-19 Kimberly-Clark Worldwide, Inc. Feuille de nettoyage, systeme et appareil
JP2005120169A (ja) * 2003-10-15 2005-05-12 Lintec Corp ラビング布貼付け用両面粘着テープ及びそれを貼付したローラ巻着用ラビングシート
WO2008056584A1 (fr) * 2006-11-07 2008-05-15 Kuraray Trading Co., Ltd. Tissu de frottement
JP2009015317A (ja) * 2007-06-06 2009-01-22 Toray Ind Inc ラビング布
JP2012021160A (ja) * 2011-08-29 2012-02-02 Lintec Corp ラビング布貼付け用両面粘着テープ及びそれを貼付したローラ巻着用ラビングシート
TWI384100B (zh) * 2010-01-25 2013-02-01 Tai Yuen Textile Co Ltd 配向布及配向裝置
CN104451921A (zh) * 2013-09-22 2015-03-25 东丽纤维研究所（中国）有限公司 一种吸水速干型长纤维、织物及制造方法
CN107208322A (zh) * 2015-02-13 2017-09-26 东丽株式会社 芯鞘复合纤维和缺口纤维以及这些纤维的制造方法
JP2021146623A (ja) * 2020-03-19 2021-09-27 株式会社リコー 払拭装置、液体吐出装置、及び払拭方法
WO2024156411A1 (fr) * 2023-01-24 2024-08-02 Alexandra Plewnia Procédé de fabrication d'une fibre hydrophobe, fibre, fil et structure plane textile

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Cited By (15)

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WO2003049589A1 (fr) * 2001-12-12 2003-06-19 Kimberly-Clark Worldwide, Inc. Feuille de nettoyage, systeme et appareil
JP2005120169A (ja) * 2003-10-15 2005-05-12 Lintec Corp ラビング布貼付け用両面粘着テープ及びそれを貼付したローラ巻着用ラビングシート
TWI393811B (zh) * 2006-11-07 2013-04-21 Kuraray Trading Co Ltd 摩擦布
WO2008056584A1 (fr) * 2006-11-07 2008-05-15 Kuraray Trading Co., Ltd. Tissu de frottement
KR101494018B1 (ko) 2006-11-07 2015-02-16 구라레 트레이딩 가부시키가이샤 러빙 천
JP5009300B2 (ja) * 2006-11-07 2012-08-22 クラレトレーディング株式会社 ラビング布
JP2009015317A (ja) * 2007-06-06 2009-01-22 Toray Ind Inc ラビング布
TWI384100B (zh) * 2010-01-25 2013-02-01 Tai Yuen Textile Co Ltd 配向布及配向裝置
JP2012021160A (ja) * 2011-08-29 2012-02-02 Lintec Corp ラビング布貼付け用両面粘着テープ及びそれを貼付したローラ巻着用ラビングシート
CN104451921A (zh) * 2013-09-22 2015-03-25 东丽纤维研究所（中国）有限公司 一种吸水速干型长纤维、织物及制造方法
CN107208322A (zh) * 2015-02-13 2017-09-26 东丽株式会社 芯鞘复合纤维和缺口纤维以及这些纤维的制造方法
EP3257976A4 (fr) * 2015-02-13 2018-09-12 Toray Industries, Inc. Fibre conjuguée âme-gaine, fibre fendue, et procédé de fabrication de ces fibres
JP2021146623A (ja) * 2020-03-19 2021-09-27 株式会社リコー 払拭装置、液体吐出装置、及び払拭方法
US12064968B2 (en) 2020-03-19 2024-08-20 Ricoh Company, Ltd. Wiping device, liquid discharging device, and wiping method
WO2024156411A1 (fr) * 2023-01-24 2024-08-02 Alexandra Plewnia Procédé de fabrication d'une fibre hydrophobe, fibre, fil et structure plane textile

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