Pressure-sensitive adhesive sheet for tire and method for producing the same

Patent metadata

Field	Value
Publication number	US-10647165-B2
Application number	US-201715470221-A
Country	US
Kind code	B2
Filing date	Mar 27, 2017
Priority date	Mar 31, 2016
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

Provided is a pressure sensitive adhesive sheet for tires that enables continuous and efficient labeling on tires using a labeling apparatus. The pressure sensitive adhesive sheet includes a release material (C), a first pressure sensitive adhesive layer (B 1 ), a first substrate (A 1 ), a second pressure sensitive adhesive layer (B 2 ), and a second substrate (A 2 ), in this order, and satisfies Requirement (1): in a planar view of the pressure sensitive adhesive sheet for tires, the outline of the first pressure sensitive adhesive layer (B 1 ) exists inside the outline of the second substrate (A 2 ), and Requirement (2): the shortest distance (X) between the outline of the second substrate (A 2 ) and the outline of the second pressure sensitive adhesive layer (B 2 ) is 0.35 mm or more.

First claim

What is claimed is:

1. A pressure sensitive adhesive sheet for tires, comprising:
a release material (C);
a first pressure sensitive adhesive layer (B 1 );
a first substrate (A 1 );
a second pressure sensitive adhesive layer (B 2 ); and
a second substrate (A 2 ),
wherein the release material (C), the first and second pressure sensitive adhesive layers (B 1 , B 2 ), and the first and second substrates (A 1 , A 2 ) are in an order of the release material (C), the first pressure sensitive adhesive layer (B 1 ), the first substrate (A 1 ), the second pressure sensitive adhesive layer (B 2 ), and the second substrate (A 2 ),
the second substrate (A 2 ) is a resin film comprising a thermoplastic resin, where the thermoplastic resin consists of at least one selected from the group consisting of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polystyrene, and nylon, or is a synthetic paper,
in a planar view of the pressure sensitive adhesive sheet, an outline of the first pressure sensitive adhesive layer (B 1 ) exists inside an outline of the second substrate (A 2 ), and
in the planar view of the pressure sensitive adhesive sheet, an outline of the second pressure sensitive adhesive layer (B 2 ) exists inside the outline of the second substrate (A 2 ) such that a shortest distance (X) between the outline of the second substrate (A 2 ) and the outline of the second pressure sensitive adhesive layer (B 2 ) is 0.35 mm or more.

2. The pressure sensitive adhesive sheet for tires according to claim 1 , wherein a MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is 0.10 mN or more.

3. The pressure sensitive adhesive sheet for tires according to claim 1 , wherein the first pressure sensitive adhesive layer (B 1 ) is formed of a hot-melt pressure sensitive adhesive composition.

4. The pressure sensitive adhesive sheet for tires according to claim 3 , wherein the hot-melt pressure sensitive adhesive composition comprises 15 to 40% by mass of a block copolymer, 30 to 70% by mass of a tackifier, and 10 to 40% by mass of a plasticizer.

5. The pressure sensitive adhesive sheet for tires according to claim 2 , wherein the MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is from 0.10 mN to 0.40 mN.

6. The pressure sensitive adhesive sheet for tires according to claim 2 , wherein the MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is from 0.10 mN to 0.20 mN.

7. The pressure sensitive adhesive sheet for tires according to claim 3 , wherein the hot-melt pressure sensitive adhesive composition comprises 15 to 30% by mass of a block copolymer, 30 to 70% by mass of a tackifier, and 10 to 40% by mass of a plasticizer.

8. The pressure sensitive adhesive sheet for tires according to claim 1 , wherein the second pressure sensitive adhesive layer (B 2 ) is formed of an energy ray-polymerizable pressure sensitive adhesive composition.

9. The pressure sensitive adhesive sheet for tires according to claim 1 , wherein, in the planar view of the pressure sensitive adhesive sheet, the outline of the first pressure sensitive adhesive layer (B 1 ) exists inside the outline of the second substrate (A 2 ) such that a shortest distance (Z) between the outline of the second substrate (A 2 ) and the outline of the first pressure sensitive adhesive layer (B 1 ) is from 0.1 mm to 10 mm.

10. The pressure sensitive adhesive sheet for tires according to claim 1 , wherein the shortest distance (X) between the outline of the second substrate (A 2 ) and the outline of the second pressure sensitive adhesive layer (B 2 ) is from 0.40 mm to 10 mm.

11. A method for producing a pressure sensitive adhesive sheet for tires, which comprises a release material (C), a first pressure sensitive adhesive layer (B 1 ), a first substrate (A 1 ), a second pressure sensitive adhesive layer (B 2 ), and a second substrate (A 2 )′, in this order,
the method comprising, sequentially from (1)′ to (7)′:
(1)′: providing a laminate ( 1 ) having a release material (C), a first pressure sensitive adhesive layer (B 1 ), and a first substrate (A 1 ), in this order, and forming a layer (B 2 )′ of an energy ray-polymerizable adhesive composition on the first substrate (A 1 ) of the laminate (I), thereby forming a laminate (II)′;
(2)′: die cutting a laminate part (L)′ composed of the first pressure sensitive adhesive layer (B 1 ), the first substrate (A 1 ) and the layer (B 2 )′, thereby forming a laminate (III)′ and a selvage part (Y 1 )′;
(3)′: removing the selvage part (Y 1 )′ formed in ( 2 )′;
(4)′: providing a second substrate (A 2 )′ on a surface of the layer (B 2 )′, thereby forming a laminate (IV)′;
(5)′: irradiating the layer (B 2 )′ with energy rays having passed through the second substrate (A 2 )′ to cause polymerization, thereby forming a second pressure sensitive adhesive layer (B 2 ) to constitute a laminate (IV);
(6)′: die cutting the second substrate (A 2 )′ in such a manner that, in a planar view of the second substrate (A 2 )′, an outline of the first pressure sensitive adhesive layer (B 1 ) exists inside an outline of the second substrate (A 2 )′, that an outline of the second pressure sensitive adhesive layer (B 2 ) exists inside the outline of the second substrate (A 2 )′, and that a shortest distance (X) between the outline of the second substrate (A 2 )′ and the outline of the second pressure sensitive adhesive layer (B 2 ) is 0.35 mm or more, thereby forming a laminate (V) and a selvage part (Y 2 ); and
(7)′: removing the selvage part (Y 2 ) formed in ( 6 ),
wherein the second substrate (A 2 )′ is free of polyethylene.

12. A pressure sensitive adhesive sheet for tires, comprising:
a release material (C);
a first pressure sensitive adhesive layer (B 1 );
a first substrate (A 1 );
a second pressure sensitive adhesive layer (B 2 ); and
a second substrate (A 2 ),
wherein the release material (C), the first and second pressure sensitive adhesive layers (B 1 , B 2 ), and the first and second substrates (A 1 , A 2 ) are in an order of the release material (C), the first pressure sensitive adhesive layer (B 1 ), the first substrate (A 1 ), the second pressure sensitive adhesive layer (B 2 ), and the second substrate (A 2 ),
the second substrate (A 2 ) is free of polyethylene,
in a planar view of the pressure sensitive adhesive sheet, an outline of the first pressure sensitive adhesive layer (B 1 ) exists inside an outline of the second substrate (A 2 ), and
in the planar view of the pressure sensitive adhesive sheet, an outline of the second pressure sensitive adhesive layer (B 2 ) exists inside the outline of the second substrate (A 2 ) such that a shortest distance (X) between the outline of the second substrate (A 2 ) and the outline of the second pressure sensitive adhesive layer (B 2 ) is 0.35 mm or more.

13. The pressure sensitive adhesive sheet for tires according to claim 12 , wherein a MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is 0.10 mN or more.

14. The pressure sensitive adhesive sheet for tires according to claim 13 , wherein the MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is from 0.10 mN to 0.40 mN.

15. The pressure sensitive adhesive sheet for tires according to claim 13 , wherein the MD stiffness of the second substrate (A 2 ), measured in the Gurley method according to JIS L 1085, is from 0.10 mN to 0.20 mN.

16. The

Assignees

• Lintec Corp

Inventors

• Tanaka Yoshikazu

Classifications

• C09J153/02

  Vinyl aromatic monomers and conjugated dienes · CPC title

• C09J7/35

  Heat-activated · CPC title

• C09J7/387

  Block-copolymers · CPC title

• C09J2453/00

  Presence of block copolymer · CPC title

• C08K5/13

  Phenols; Phenolates · CPC title