WO2016063785A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2016063785A1 WO2016063785A1 PCT/JP2015/079143 JP2015079143W WO2016063785A1 WO 2016063785 A1 WO2016063785 A1 WO 2016063785A1 JP 2015079143 W JP2015079143 W JP 2015079143W WO 2016063785 A1 WO2016063785 A1 WO 2016063785A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tire
- inner liner
- film
- liner member
- rubber
- Prior art date
Links
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- 239000005060 rubber Substances 0.000 claims abstract description 98
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
- B29D30/42—Endless textile bands without bead-rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D2030/0682—Inner liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
- B29D30/42—Endless textile bands without bead-rings
- B29D2030/421—General aspects of the joining methods and devices for creating the bands
- B29D2030/423—Joining by overlapping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
- B60C2005/145—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre made of laminated layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
- B60C2005/147—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre characterised by the joint or splice
Definitions
- the present invention relates to a pneumatic tire.
- an inner liner composed of at least a three-layer structure of a film mainly composed of a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, and a rubber sheet laminated on both sides thereof.
- a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, and a rubber sheet laminated on both sides thereof.
- the inner liner member is wound around a tire molding drum and the end is wrapped.
- a manufacturing method is employed in which the tire is spliced and used for a tire vulcanization process (Patent Documents 4-6).
- a film 2 mainly composed of a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, and both of them are used.
- the inner liner member 1 composed of at least a three-layer structure of rubber sheets 3A and 3B laminated on the side is formed in a required size (length) determined according to the tire size, and is shown by a two-dot chain line as a model.
- lap splice portions 4 are provided at both end portions thereof, and the lap splices are overlapped so as to form an annular shape as a whole.
- the rubber sheet 3 ⁇ / b> B has a function as a tie rubber having a function of joining with other tire constituent members such as a carcass layer.
- the peeling state 6 is caused at the interface between the film 2 and the rubber sheet 3A, particularly at the interface near the end.
- the lap splice 4 progresses to an open (opening) or the like due to the occurrence or further peeling.
- the adhesion force (tack) between the surface of the molding drum 5 and the rubber sheet 3A is high. Therefore, in the molding process, the film 2 and the rubber sheet 3A. In particular, the interface in the vicinity of the end portion tends to be the starting point of the peeled state 6.
- the joining state of the lap splice part is unraveled by peeling or the like, and the joining part opens (opens), or that Cause cracks in the vicinity of the lap splice after starting to run a pneumatic tire Tire failure such as without, is to provide a pneumatic tire excellent in durability of the moiety.
- the pneumatic tire of the present invention that achieves the above-described object has the following configuration (1).
- (1) From at least a three-layer structure of a film 2 mainly composed of a thermoplastic resin or a thermoplastic elastomer composition comprising a thermoplastic resin and an elastomer blend and rubber sheets 3A and 3B laminated on both sides thereof.
- the constructed inner liner member 1 is affixed to the inner circumferential surface of the tire, and the tire 2 has a lap splice portion 4 in which the tire circumferential direction end portion overlaps with the rubber sheets 3A and 3B.
- a rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 is formed longer in the tire circumferential direction length than the adjacent film 2 in the tire.
- a pneumatic tire characterized by
- the pneumatic tire of the present invention preferably has any one of the following configurations (2) to (7).
- the lap splice length (S) of the inner liner member 1 located on the tire outer peripheral side and the inner liner member 1 located on the tire lumen side in the lap splice portion 4 is 3 mm or more and 25 mm or less.
- the wrap splice length (A) of the film 22 of the inner liner member 1 located on the tire outer peripheral side in the lap splice portion 4 and the film 21 of the inner liner member 1 located on the tire lumen side is 0 mm.
- the rubber sheet 3B on the tire outer periphery side and the rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 have a difference in length (C),
- the rubber sheet 3B on the tire outer peripheral side and the rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 have a difference in length (C),
- a film mainly composed of a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, and a rubber sheet laminated on both sides thereof.
- a pneumatic tire having a lap splice structure in which an inner liner member composed of a three-layer structure is internally attached to an inner peripheral surface of a tire, and end portions in the tire circumferential direction of the film overlap with each other via the rubber sheet.
- the joining state of the lap splice part is unraveled due to peeling or the like, and the joining part opens (opens), and that is a factor.
- Become cracks in the vicinity of the lap splice after starting to run a pneumatic tire Without tire failure has excellent pneumatic tire durability of the splice portion of the inner liner member.
- FIGS. 5 (a), 5 (b), and 5 (c) each illustrate problems of the prior art
- FIG. 5 (a) shows an inner liner member having a predetermined size (length).
- FIG. 5 (b) shows the state shown in FIG. 5 (a). It is the model figure which showed the state which peeling generate
- FIG. 5C is a side view for explaining a model example of the structure of the splice part after vulcanization molding.
- the pneumatic tire of the present invention comprises a film 2 mainly composed of a thermoplastic elastomer composition comprising a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, and both sides thereof.
- An inner liner member 1 composed of at least a three-layer structure of rubber sheets 3A and 3B laminated to each other is internally attached to the tire inner peripheral surface, and the tire circumferential direction end of the film 2 is interposed via the rubber sheets 3A and 3B.
- a rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 is adjacent to the film 2 It is characterized by being formed longer in the tire circumferential direction length.
- the portion in which the rubber sheet 3A on the tire lumen side is formed longer than the adjacent film 2 is the length indicated by G in FIG. 1, and shows another embodiment of the present invention. 2 and 3, the length G is as shown in each figure.
- the rubber sheet 3 ⁇ / b> A on the tire lumen side of the inner liner member 1 located on the tire lumen side is formed longer in the tire circumferential direction length than the adjacent film 2. Since there is no film end at the position corresponding to the end face of the inner liner member 1, the rubber sheets 3 A and 3 B have a greater contact force (tack) between the rubber sheet 3 A and the forming drum 5 due to pressure bonding during splicing.
- the rubber sheet 3A and the film 2 in the molded green tire (the film 2 on the tire lumen side is shown as 21 in particular, and the film 2 on the outer periphery side of the tire is shown as 22 in particular, as shown in FIG. 1 to FIG. It is possible to suppress the peeling phenomenon between FIG.
- this invention has the structure which laminated
- the length of the rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 is longer than the adjacent film 21 in the tire circumferential direction length.
- (G) is preferably 3 mm or more and 25 mm or less. If the difference in length (G) is less than 3 mm, the area where the rubber sheets 3A and 3B are in close contact with each other at the time of tire molding is reduced, and the adhesion between the green tire and the molding drum 5 is increased. This is because there is a possibility of occurrence. On the other hand, when it is larger than 25 mm, it leads to deterioration of tire uniformity, which is not preferable.
- the rubber sheet 3B on the tire outer peripheral side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 is formed to be longer in the tire circumferential direction length than the adjacent film 2 (21).
- (B) (FIGS. 1 and 2) is preferably 3 mm or more.
- the inner liner member 1 located on the tire outer peripheral side in the lap splice portion 4 and the lap splice length (S) of the inner liner member 1 located on the tire lumen side Is preferably 3 mm or more and 25 mm or less. This is because if the lap splice length (S) is less than 3 mm, the overall adhesion at the splice portion is weakened, and the possibility of occurrence of a peeling phenomenon occurs. On the other hand, when it is larger than 25 mm, it leads to deterioration of tire uniformity, which is not preferable.
- the wrap splice length (A) of the film 22 of the inner liner member 1 located on the tire outer peripheral side in the lap splice portion 4 and the film 21 of the inner liner member 1 located on the tire lumen side is preferably 0 mm or more, and more preferably 3 mm or more.
- the splice length between the films 21 and 22 is less than 0 mm, a portion where the film does not exist is formed in the tire circumferential direction, and performance characteristics as an inner liner constituting member inherent to the film (air permeation prevention performance) It is because it becomes difficult to exhibit this well.
- the rubber sheet 3B on the tire outer periphery side and the rubber sheet 3A on the tire lumen side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 have a difference in length (C).
- the rubber sheet 3A on the tire lumen side is preferably 3 mm or longer (FIG. 3).
- the rubber sheet 3B on the tire outer periphery side of the inner liner member 1 located on the tire lumen side in the lap splice portion 4 and the rubber sheet 3A on the tire lumen side have a difference in length (C), and the tire outer periphery side
- the rubber sheet 3B is preferably 3 mm or longer (FIG. 2).
- Such a configuration is preferable in that the level difference in the lap splice portion 4 is reduced and the difference in thickness is reduced, the difference in rigidity can be reduced, and the occurrence of cracks and cracks is prevented.
- the film 2 is a film mainly composed of a thermoplastic resin or a film mainly composed of a thermoplastic elastomer composition comprising a blend of a thermoplastic resin and an elastomer.
- thermoplastic resin examples include polyamide resins [for example, nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 11 (N11), nylon 12 (N12). , Nylon 610 (N610), nylon 612 (N612), nylon 6/66 copolymer (N6 / 66), nylon 6/66/610 copolymer (N6 / 66/610), nylon MXD6 (MXD6), nylon 6T, nylon 9T, nylon 6 / 6T copolymer, nylon 66 / PP copolymer, nylon 66 / PPS copolymer] and their N-alkoxyalkylated products, such as methoxymethylated products of nylon 6, nylon 6 / 610 copolymer methoxymethylated, nylon 612 methoxymethylated, poly Stell resin (for example, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene isophthalate (PEI), PET /
- PBT polybutylene
- polyester resins and polyamide resins are preferable in terms of physical properties, processability, and handleability.
- the resin and the elastomer constituting the blend (resin composition) that can constitute the film 2 can be used as the above-mentioned resins (thermoplastic resins)
- the elastomer constituting the blend (resin composition) include diene rubbers and hydrogenated products thereof [for example, natural rubber (NR), isoprene rubber (IR), epoxidized natural rubber, styrene butadiene rubber (SBR).
- BR butadiene rubber
- NBR nitrile rubber
- SBR hydrogenated NBR
- olefin rubber eg, ethylene propylene rubber (EPDM, EPM), maleic acid modified ethylene Propylene rubber (M-EPM), butyl rubber (IIR), isobutylene and aromatic vinyl or diene monomer copolymer, acrylic rubber (ACM), ionomer], halogen-containing rubber (eg, Br-IIR, CI-IIR, bromine) Isobutylene-p-methylstyrene copolymer (BIMS), chloropre Rubber (CR), hydrin rubber (CHR), chlorosulfonated polyethylene rubber (CSM), chlorinated polyethylene rubber (CM), maleic acid modified chlorinated polyethylene rubber (M-CM)], silicone rubber [eg methyl vinyl silicone rubber Dimethylsilicone rubber, methylphenylvinylsilicone rubber], sulfur-containing
- 50% by weight or more of the elastomer is a halogenated butyl rubber, a brominated isobutylene paramethylstyrene copolymer rubber, or a maleic anhydride-modified ethylene ⁇ -olefin copolymer rubber. It is preferable in that it can be made flexible and highly durable.
- thermoplastic resin in the blend is nylon 11, nylon 12, nylon 6, nylon 6, nylon 66, nylon 6/66 copolymer, nylon 6/12 copolymer, nylon 6 / 10 copolymer, nylon 4/6 copolymer, nylon 6/66/12 copolymer, aromatic nylon, and ethylene / vinyl alcohol copolymer to obtain excellent durability This is preferable.
- the blend when the blend is obtained by blending with a combination of the specific thermoplastic resin and the specific elastomer described above, if the compatibility is different, using a suitable compatibilizer as the third component, Can be compatibilized.
- the compatibilizer By mixing the compatibilizer with the blend system, the interfacial tension between the thermoplastic resin and the elastomer decreases, and as a result, the particle size of the elastomer forming the dispersed phase becomes fine, so the characteristics of both components are It will be expressed more effectively.
- Such a compatibilizing agent generally includes a copolymer having a structure of both or one of a thermoplastic resin and an elastomer, or an epoxy group, a carbonyl group, a halogen group, and an amino group capable of reacting with the thermoplastic resin or elastomer.
- a copolymer having a oxazoline group, a hydroxyl group and the like can be taken.
- composition ratio of the specific thermoplastic resin and the elastomer in the blended product of the thermoplastic resin and the elastomer is not particularly limited, and a structure in which the elastomer is dispersed as a discontinuous phase in the thermoplastic resin matrix.
- the preferred range is 90/10 to 30/70 by weight.
- thermoplastic resin or the blend of the thermoplastic resin and the elastomer is blended with another polymer such as a compatibilizing agent within a range that does not impair the characteristics necessary for constituting the film 2.
- a compatibilizing agent within a range that does not impair the characteristics necessary for constituting the film 2.
- the purpose of mixing other polymers is to improve the compatibility between the thermoplastic resin and the elastomer, to improve the molding processability of the material, to improve the heat resistance, to reduce the cost, etc.
- the material that can be used include polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS, SBS, and polycarbonate (PC).
- fillers (calcium carbonate, titanium oxide, alumina, etc.) generally incorporated into polymer blends, reinforcing agents such as carbon black and white carbon, softeners, plasticizers, processing aids, pigments, dyes, and aging An inhibitor or the like can be arbitrarily blended as long as the necessary characteristics as the fixing member 7 are not impaired.
- the blend of the thermoplastic resin and the elastomer has a structure in which the elastomer is dispersed as a discontinuous phase in the matrix of the thermoplastic resin. By taking such a structure, it is possible to obtain molding processability equivalent to that of a thermoplastic resin.
- the elastomer blended with the thermoplastic resin can be dynamically vulcanized upon mixing with the thermoplastic resin.
- the vulcanizing agent, vulcanization aid, vulcanization conditions (temperature, time), and the like in the case of dynamic vulcanization may be appropriately determined according to the composition of the elastomer to be added, and are not particularly limited.
- the fixing member to be obtained contains the vulcanized elastomer. This is preferable because the effect of the present invention can be increased.
- a general rubber vulcanizing agent (crosslinking agent) can be used as the vulcanizing agent.
- sulfur vulcanizing agents include powdered sulfur, precipitated sulfur, highly dispersible sulfur, surface-treated sulfur, insoluble sulfur, dimorpholine disulfide, alkylphenol disulfide, and the like.
- about 4 phr in the present specification, “phr” refers to parts by weight per 100 parts by weight of the elastomer component; the same applies hereinafter).
- Organic peroxide vulcanizing agents include benzoyl peroxide, t-butyl hydroperoxide, 2,4-dichlorobenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxide). Examples thereof include oxy) hexane, 2,5-dimethylhexane-2,5-di (peroxylbenzoate), and about 1 to 20 phr can be used.
- examples of the phenol resin vulcanizing agent include bromides of alkyl phenol resins, mixed crosslinking systems containing halogen donors such as tin chloride and chloroprene, and alkyl phenol resins. For example, about 1 to 20 phr is used. Can do.
- zinc white about 5 phr
- magnesium oxide about 4 phr
- risurge about 10 to 20 phr
- p-quinonedioxime p-dibenzoylquinonedioxime
- tetrachloro-p-benzoquinone poly-p- Examples include dinitrosobenzene (about 2 to 10 phr) and methylenedianiline (about 0.2 to 10 phr).
- a vulcanization accelerator as needed.
- the vulcanization accelerator include general vulcanization accelerators such as aldehyde / ammonia, guanidine, thiazole, sulfenamide, thiuram, dithioate, and thiourea, such as 0.5 to About 2 phr can be used.
- the weight ratio in the blend of the thermoplastic resin and the elastomer is not particularly limited, but preferably the weight ratio is 10/90 to 80/20, preferably 20/80 to 70. It is good to adjust so that the elastomer component may be uniformly dispersed as a discontinuous phase in the thermoplastic resin matrix.
- the rubber materials constituting the rubber sheets 3A and 3B include diene rubbers such as natural rubber, isoprene rubber, epoxidized natural rubber, styrene butadiene rubber, hydrogenated styrene butadiene rubber, ethylene propylene rubber, and maleic acid modified ethylene.
- Diene rubbers such as natural rubber, isoprene rubber, epoxidized natural rubber, styrene butadiene rubber, hydrogenated styrene butadiene rubber, ethylene propylene rubber, and maleic acid modified ethylene.
- Olefin rubbers such as propylene rubber can be preferably used.
- the film 2 is preferably laminated with an adhesive layer interposed in order to improve the adhesion with the adjacent rubber sheets 3A and 3B.
- an adhesive layer acrylate copolymers such as ultrahigh molecular weight polyethylene having a molecular weight of 1 million or more, preferably 3 million or more, ethylene ethyl acrylate copolymer, ethylene methyl acrylate resin, ethylene acrylic acid copolymer, etc.
- maleic anhydride adduct polypropylene and its maleic acid modification, ethylene propylene copolymer and its maleic acid modification, polybutadiene resin and its maleic anhydride modification, styrene-butadiene-styrene copolymer, styrene An ethylene-butadiene-styrene copolymer, a fluorine-based thermoplastic resin, or a polyester-based thermoplastic resin is preferably used.
- the thickness of the film 2 is not particularly limited, but it is usually preferable to use a film having a thickness of about 0.002 to 0.3 mm.
- the thickness of each of the rubber sheets 3A and 3B is not particularly limited, but it is practical to use one having a thickness of 0.1 to 1.8 mm, preferably 0.2 to 1.0 mm. is there.
- the thickness of the rubber sheet is less than 0.1 mm, the laminating work on the film 2 is in a direction to deteriorate, and the deterioration of the film 2 due to heat from the bladder at the time of vulcanization can be suppressed. It will be difficult. Moreover, since it will cause the weight increase of a tire when exceeding 1.8 mm, it is not desirable.
- FIG. 4 is a partially broken perspective view showing an example of the form of the pneumatic tire according to the present invention.
- the pneumatic tire T is provided so that the sidewall portion 12 and the bead portion 13 are connected to the left and right of the tread portion 11.
- a carcass layer 14 that is a skeleton of the tire is provided so as to straddle between the left and right bead portions 13 and 13 in the tire width direction.
- Two belt layers 15 made of steel cord are provided on the outer peripheral side of the carcass layer 14 corresponding to the tread portion 11.
- An arrow E indicates the tire width direction
- an arrow X indicates the tire circumferential direction.
- An inner liner layer 10 is disposed inside the carcass layer 14 and a lap splice portion 4 extends in the tire width direction.
- peeling resistance peeling resistance
- peeling resistance peeling resistance
- Example 1 Using 195 / 65R15 91H as test tires, 10 tires were produced for each Example (Example 1-5) and Comparative Example (Comparative Example 1), and this was attached to a JATMA standard rim 15 ⁇ 6J. It used for the test.
- Comparative Example 1 has the conventional splice structure shown in FIG. 5 (a), and the tires of the examples of the present invention are those shown in FIGS. 1 to 3, respectively.
- Value, (G) value, (B) value, (C) value, and (A) value are as shown in Table 1.
- the film has a thickness of 0.1
- peeling resistance peeling resistance in a green tire: In the state of the completed green tire, a check was made on the inner surface of the splice portion of the inner liner to check for peeling. Confirmation was performed visually.
- peeling resistance peeling resistance of product tire: After running for 80 hours at a tire internal pressure of 120 kPa, a load of 7.24 kN, and a speed of 81 km / h on a drum tester, on the inner surface of the inner liner splice A check was performed to confirm the presence or absence of peeling. Confirmation was performed visually.
- Tire uniformity test According to JASO C-607-87, RFV (maximum value of radial force fluctuation) was measured. The n number was set to 10 and the average value was calculated and evaluated. The results are shown by index evaluation with a tire having a conventional splice structure (Comparative Example 1) as 100. The larger the number, the better, and it was judged that there was a difference of 5%.
- the pneumatic tire according to the present invention is lapped at the time of green tire molding, further after the vulcanization molding of the tire, and after the pneumatic tire starts running. It can be seen that this is a pneumatic tire with no failure such as peeling or cracking in the vicinity of the splice.
- Inner liner member 2 21, 22: Film 3A, 3B: Rubber sheet 4: Lap splice part 5: Tire molding drum 6: Peeling state 7: Near end of film 10: Inner liner layer 11: Tread part 12: Side Wall part 13: Bead part 14: Carcass layer 15: Belt layer 16: Bead filler T: Pneumatic tire A: Inner liner member film located on the tire outer peripheral side in the lap splice part and inner part located on the tire lumen side Lap splice length B of the film of the liner member: The rubber sheet on the tire outer peripheral side of the inner liner member located on the tire lumen side in the lap splice portion is formed longer in the tire circumferential length than the adjacent film.
- Length C Tire lumen side at lap splice Difference in length between the rubber sheet on the tire outer periphery side and the rubber sheet on the tire lumen side of the inner liner member positioned
- G rubber sheet on the tire lumen side of the inner liner member positioned on the tire lumen side in the lap splice portion Is formed longer than the adjacent film in the tire circumferential direction length
- S circumferential lap splice length between inner liner members EE: tire width direction
- XX tire circumferential direction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
(1)熱可塑性樹脂または熱可塑性樹脂とエラストマーのブレンド物を含んでなる熱可塑性エラストマー組成物を主成分とするフィルム2とその両サイドに積層されたゴムシート3A、3Bの少なくとも3層構造から構成されたインナーライナー部材1をタイヤ内周面に内貼りし、前記フィルム2のタイヤ周方向端部が前記ゴムシート3A、3Bを介して重なっているラップスプライス部4を有してなる空気入りタイヤであって、該ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ内腔側のゴムシート3Aが、隣接する前記フィルム2よりもタイヤ周方向長さにおいて長く形成されてなることを特徴とする空気入りタイヤ。
(2)前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ内腔側のゴムシート3Aが、隣接する前記フィルム21よりもタイヤ周方向長さにおいて長く形成されている長さ(G)が、3mm以上であることを特徴とする上記(1)記載の空気入りタイヤ。
(3)前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bが、隣接する前記フィルム21よりもタイヤ周方向長さにおいて長く形成されている長さ(B)が、3mm以上であることを特徴とする上記(1)または(2)記載の空気入りタイヤ。
(4)前記ラップスプライス部4においてタイヤ外周側に位置する前記インナーライナー部材1と、タイヤ内腔側に位置する前記インナーライナー部材1のラップスプライス長さ(S)が、3mm以上25mm以下であることを特徴とする上記(1)~(3)のいずれかに記載の空気入りタイヤ。
(5)前記ラップスプライス部4においてタイヤ外周側に位置する前記インナーライナー部材1のフィルム22と、タイヤ内腔側に位置する前記インナーライナー部材1のフィルム21のラップスプライス長さ(A)が0mm以上であることを特徴とする上記(1)~(4)のいずれかに記載の空気入りタイヤ。
(6)前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bとタイヤ内腔側のゴムシート3Aが長さの差(C)を有し、タイヤ内腔側のゴムシート3Aが3mm以上長いことを特徴とする上記(1)~(5)のいずれかに記載の空気入りタイヤ。
(7)前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bとタイヤ内腔側のゴムシート3Aが長さの差(C)を有し、タイヤ外周側のゴムシート3Bが3mm以上長いことを特徴とする上記(1)~(5)のいずれかに記載の空気入りタイヤ。
以下、実施例などにより、本発明の空気入りタイヤについて具体的に説明する。
(S):インナーライナー部材同士の周方向のラップスプライス長さ(mm)
(G):ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ内腔側のゴムシートが、隣接するフィルムよりもタイヤ周方向長さにおいて長く形成されている長さ(mm)
(A):ラップスプライス部においてタイヤ外周側に位置するインナーライナー部材のフィルムと、タイヤ内腔側に位置するインナーライナー部材のフィルムのラップスプライス長さ(mm)
(B):ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ外周側のゴムシートが、隣接するフィルムよりもタイヤ周方向長さにおいて長く形成されている長さ(mm)
(C):ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ外周側のゴムシートとタイヤ内腔側のゴムシートが有する長さの差(mm)
フィルムは厚さ0.1mm、ゴムシートは厚さ0.7mmのものである。
完成したグリーンタイヤの状態で、インナーライナーのスプライス部のタイヤ内面上チェックを実施し、剥がれの有無の確認を行った。確認は目視で行った。
表1に示したように、本発明にかかる空気入りタイヤは、グリーンタイヤの成形時、さらに、タイヤの加硫成形後の時点、さらに、空気入りタイヤの走行開始した後のいずれにおいても、ラップスプライス部付近において剥がれやクラックが発生することなど、故障の発生がない空気入りタイヤであることがわかる。
2、21、22:フィルム
3A、3B:ゴムシート
4:ラップスプライス部
5:タイヤ成形ドラム
6:剥離状態
7:フィルムの先端付近
10:インナーライナー層
11:トレッド部
12:サイドウォール部
13:ビード部
14:カーカス層
15:ベルト層
16:ビードフィラー
T:空気入りタイヤ
A:ラップスプライス部においてタイヤ外周側に位置するインナーライナー部材のフィルムと、タイヤ内腔側に位置するインナーライナー部材のフィルムのラップスプライス長さ
B:ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ外周側のゴムシートが、隣接するフィルムよりもタイヤ周方向長さにおいて長く形成されている長さ
C:ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ外周側のゴムシートとタイヤ内腔側のゴムシートが有する長さの差
G:ラップスプライス部においてタイヤ内腔側に位置するインナーライナー部材のタイヤ内腔側のゴムシートが、隣接するフィルムよりもタイヤ周方向長さにおいて長く形成されている長さ
S:インナーライナー部材同士の周方向のラップスプライス長さ
E-E:タイヤ幅方向
X-X:タイヤ周方向
Claims (7)
- 熱可塑性樹脂または熱可塑性樹脂とエラストマーのブレンド物を含んでなる熱可塑性エラストマー組成物を主成分とするフィルム2とその両サイドに積層されたゴムシート3A、3Bの少なくとも3層構造から構成されたインナーライナー部材1をタイヤ内周面に内貼りし、前記フィルム2のタイヤ周方向端部が前記ゴムシート3A、3Bを介して重なっているラップスプライス部4を有してなる空気入りタイヤであって、該ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ内腔側のゴムシート3Aが、隣接する前記フィルム2よりもタイヤ周方向長さにおいて長く形成されてなることを特徴とする空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ内腔側のゴムシート3Aが、隣接する前記フィルム21よりもタイヤ周方向長さにおいて長く形成されている長さ(G)が、3mm以上であることを特徴とする請求項1記載の空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bが、隣接する前記フィルム21よりもタイヤ周方向長さにおいて長く形成されている長さ(B)が、3mm以上であることを特徴とする請求項1記載の空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ外周側に位置する前記インナーライナー部材1と、タイヤ内腔側に位置する前記インナーライナー部材1のラップスプライス長さ(S)が、3mm以上25mm以下であることを特徴とする請求項1~3のいずれかに記載の空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ外周側に位置する前記インナーライナー部材1のフィルム22と、タイヤ内腔側に位置する前記インナーライナー部材1のフィルム21のラップスプライス長さ(A)が0mm以上であることを特徴とする請求項1~4のいずれかに記載の空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bとタイヤ内腔側のゴムシート3Aが長さの差(C)を有し、タイヤ内腔側のゴムシート3Aが3mm以上長いことを特徴とする請求項1~5のいずれかに記載の空気入りタイヤ。
- 前記ラップスプライス部4においてタイヤ内腔側に位置する前記インナーライナー部材1のタイヤ外周側のゴムシート3Bとタイヤ内腔側のゴムシート3Aが長さの差(C)を有し、タイヤ外周側のゴムシート3Bが3mm以上長いことを特徴とする請求項1~5のいずれかに記載の空気入りタイヤ。
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DE112015004835.9T DE112015004835T5 (de) | 2014-10-22 | 2015-10-15 | Luftreifen |
US15/521,241 US20170355228A1 (en) | 2014-10-22 | 2015-10-15 | Pneumatic Tire |
JP2015551648A JPWO2016063785A1 (ja) | 2014-10-22 | 2015-10-15 | 空気入りタイヤ |
CN201580049620.7A CN107074018A (zh) | 2014-10-22 | 2015-10-15 | 充气轮胎 |
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JP (1) | JPWO2016063785A1 (ja) |
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JP2018122497A (ja) * | 2017-01-31 | 2018-08-09 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法および空気入りタイヤ |
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JPH08217923A (ja) * | 1995-02-16 | 1996-08-27 | Yokohama Rubber Co Ltd:The | タイヤ用ポリマー組成物およびそれを使用した空気入りタイヤ |
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JP4122031B2 (ja) * | 2006-03-29 | 2008-07-23 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法 |
JP2009208444A (ja) * | 2008-03-06 | 2009-09-17 | Bridgestone Corp | インナーライナーの成型方法 |
DE102013100120A1 (de) * | 2012-01-10 | 2013-07-11 | The Yokohama Rubber Co., Ltd. | Luftreifen |
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2015
- 2015-10-15 US US15/521,241 patent/US20170355228A1/en not_active Abandoned
- 2015-10-15 CN CN201580049620.7A patent/CN107074018A/zh not_active Withdrawn
- 2015-10-15 JP JP2015551648A patent/JPWO2016063785A1/ja active Pending
- 2015-10-15 WO PCT/JP2015/079143 patent/WO2016063785A1/ja active Application Filing
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JPH08217923A (ja) * | 1995-02-16 | 1996-08-27 | Yokohama Rubber Co Ltd:The | タイヤ用ポリマー組成物およびそれを使用した空気入りタイヤ |
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JP2018122497A (ja) * | 2017-01-31 | 2018-08-09 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法および空気入りタイヤ |
WO2018142901A1 (ja) * | 2017-01-31 | 2018-08-09 | 横浜ゴム株式会社 | 空気入りタイヤの製造方法および空気入りタイヤ |
CN110191794A (zh) * | 2017-01-31 | 2019-08-30 | 横滨橡胶株式会社 | 充气轮胎的制造方法及充气轮胎 |
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DE112015004835T5 (de) | 2017-07-13 |
US20170355228A1 (en) | 2017-12-14 |
JPWO2016063785A1 (ja) | 2017-08-03 |
CN107074018A (zh) | 2017-08-18 |
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