Laminate for tires
A laminate for tires is a laminate of a layer of a rubber composition and a film comprising a thermoplastic resin or a thermoplastic elastomer composition; upon dynamic distortion of the film being 0.1%, a storage elastic modulus at 70° C. being 30 MPa or greater, and a thickness of the film being 60 μm or greater; upon dynamic distortion of the rubber composition being 0.1%, a storage elastic modulus at −20° C. being less than 400 MPa and a storage elastic modulus at 70° C. being 8.5 MPa or greater, and a thickness of the rubber composition being 150 μm or greater; and a peel strength between the film and the rubber composition determined by 180° peel test being 30 N/inch or greater.
1 . A laminate for tires, the laminate being a laminate of a layer of a rubber composition and a film comprising a thermoplastic resin or a thermoplastic elastomer composition;
a thickness of the film being from 60 μm to 180 μm and the film having a storage elastic modulus at 70° C. being 30 MPa or greater upon dynamic distortion of the film being 0.1%;
a thickness of the layer being from 150 μm to 1000 μm and the layer having a storage elastic modulus at −20° C. being less than 400 MPa and a storage elastic modulus at 70° C. being 8.5 MPa or greater upon dynamic distortion of the rubber composition being 0.1%; and
a peel strength between the film and the layer determined by 180° peel test being 30 N/inch or greater.
2 . The laminate for tires according to claim 1 , wherein
the rubber composition contains: a condensation product of formaldehyde and a compound represented by Formula (1):
wherein, R 1 , R 2 , R 3 , R 4 , and R 5 represent hydrogen, a hydroxyl group, or an alkyl group having from 1 to 8 carbons; and
a methylene donor;
a compounded amount of the condensation product is from 0.5 to 20 parts by weight per 100 parts by weight of a rubber component;
a compounded amount of the methylene donor is from 0.25 to 200 parts by weight per 100 parts by weight of the rubber component;
a ratio of the compounded amount of the methylene donor to the compounded amount of the condensation product is from 0.5 to 10.
3 . The laminate for tires according to claim 1 , wherein the rubber composition contains from 30 to 80 parts by weight of a filler per 100 parts by weight of the rubber component; and the filler is carbon black having a nitrogen adsorption specific surface area of 40 m 2 /g or greater.
4 . The laminate for tires according to claim 1 , wherein the rubber composition contains from 10 to 100 parts by weight of butadiene rubber per 100 parts by weight of the rubber component.
5 . The laminate for tires according to claim 1 , wherein the film has the storage elastic modulus at 70° C. being 30 MPa or greater and 400 MPa or less upon dynamic distortion of the film of 0.1%.
6 . The laminate for tires according to claim 1 , wherein the rubber composition contains from 30 to 100 parts by weight of butadiene rubber per 100 parts by weight of the rubber component.
7 . A laminate for tires, the laminate being a laminate of a layer of a rubber composition and a film comprising a thermoplastic resin or a thermoplastic elastomer composition; the rubber composition containing a condensation product of formaldehyde and a compound represented by Formula (1):
wherein, R 1 , R 2 , R 3 , R 4 , and R 5 represent hydrogen, a hydroxyl group, or an alkyl group having from 1 to 8 carbons;
a methylene donor; and
a filler;
a compounded amount of the condensation product being from 0.5 to 20 parts by weight per 100 parts by weight of the rubber component;
a compounded amount of the methylene donor being from 0.25 to 200 parts by weight per 100 parts by weight of the rubber component;
a ratio of the compounded amount of the methylene donor to the compounded amount of the condensation product being from 0.5 to 10;
a compounded amount of the filler being from 30 to 80 parts by weight per 100 parts by weight of the rubber component; and
the filler being carbon black having a nitrogen adsorption specific surface area of 40 m 2 /g or greater.
8 . The laminate for tires according to claim 7 , wherein the rubber composition contains from 10 to 100 parts by weight of butadiene rubber per 100 parts by weight of the rubber component.
9 . The laminate for tires according to claim 7 , wherein the film has a storage elastic modulus at 70° C. being 30 MPa or greater and 400 MPa or less upon dynamic distortion of the film of 0.1%.
10 . The laminate for tires according to claim 7 , wherein the rubber composition contains from 30 to 100 parts by weight of butadiene rubber per 100 parts by weight of the rubber component.