GAS BARRIER ADHESIVE SHEET, METHOD FOR PRODUCING SAME, ELECTRONIC MEMBER, AND OPTICAL MEMBER

• US 20140178622A1
• Filed: 07/25/2012
• Published: 06/26/2014
• Est. Priority Date: 08/03/2011
• Status: Active Grant

• Current Assignee: Lintec Corporation
• Original Assignee: Lintec Corporation
• Inventors: Kenmochi, Suguru, Naganawa, Satoshi, Nagamoto, Koichi, Fuchi, Emi
• Granted Patent: US 9,580,625 B2
• Time in Patent Office: Days
• US Class Current: 428/41.8
• CPC Class Codes: C09J 2203/318 for the production of liquid crystal displays
• CPC Class Codes: C09J 2203/326 for bonding electronic components such as wafers, chips or semiconductors
• CPC Class Codes: C09J 2301/312 parameters being the characterizing feature
• CPC Class Codes: C09J 2400/123 in the substrate
• CPC Class Codes: C09J 2400/163 in the substrate
• CPC Class Codes: C09J 2421/00 Presence of unspecified rubber
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/38 Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 428/1476 Release layer
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2848 Three or more layers

Abstract

The present invention is a gas barrier pressure-sensitive adhesive sheet comprising at least one gas barrier layer and at least one pressure-sensitive adhesive layer, the at least one pressure-sensitive adhesive layer having a storage modulus at 23° C. of 1.5×10⁴ to 1.0×10⁷ Pa, and the gas barrier pressure-sensitive adhesive sheet not including a base layer. The present invention provides: a gas barrier pressure-sensitive adhesive sheet that makes it possible to easily provide the adherend with a gas barrier capability without significantly increasing the thickness of the gas barrier pressure-sensitive adhesive sheet, does not show delamination (separation) at the interface between the pressure-sensitive adhesive layer and another layer even when subjected to high-temperature/high-humidity conditions, and exhibits excellent bendability, a method for producing the same, an electronic member that includes the gas barrier pressure-sensitive adhesive sheet, and an optical member that includes the gas barrier pressure-sensitive adhesive sheet.

Claims

1. A gas barrier pressure-sensitive adhesive sheet comprising at least one gas barrier layer and at least one pressure-sensitive adhesive layer, the at least one pressure-sensitive adhesive layer having a storage modulus at 23°

C. of 1.5×

10⁴ to 1.0×

10⁷ Pa, and the gas barrier pressure-sensitive adhesive sheet not including a base layer.

2. The gas barrier pressure-sensitive adhesive sheet according to claim 1, the gas barrier pressure-sensitive adhesive sheet having a water vapor transmission rate at a temperature of 40°

C. and a relative humidity of 90% of 0.1 g/m²/day or less.

3. The gas barrier pressure-sensitive adhesive sheet according to claim 1, wherein the at least one pressure-sensitive adhesive layer has a storage modulus at 80°

C. of 8.0×

10³ to 1.0×

10⁶ Pa.

4. The gas barrier pressure-sensitive adhesive sheet according to claim 1, the gas barrier pressure-sensitive adhesive sheet having a substantial thickness of 0.5 to 50 μ

m.

5. The gas barrier pressure-sensitive adhesive sheet according to claim 1, wherein the at least one pressure-sensitive adhesive layer is formed of a pressure-sensitive adhesive that includes a silane coupling agent or an alkoxy metal compound.

6. The gas barrier pressure-sensitive adhesive sheet according to claim 1, further comprising a protective layer.

7. The gas barrier pressure-sensitive adhesive sheet according to claim 1, further comprising a release sheet.

8. The gas barrier pressure-sensitive adhesive sheet according to claim 1, the gas barrier pressure-sensitive adhesive sheet being a pressure-sensitive adhesive sheet for an electronic member or an optical member.

9. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 1, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

10. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 1, the method comprising:

a step 1 that forms a gas barrier layer on a release side of a first release sheet to obtain a release sheet provided with the gas barrier layer;

a step 2 that forms a pressure-sensitive adhesive layer on a release side of a second release sheet to obtain a release sheet provided with the pressure-sensitive adhesive layer; and

a step 3 that bonds the release sheet provided with the gas barrier layer and the release sheet provided with the pressure-sensitive adhesive layer so that the gas barrier layer and the pressure-sensitive adhesive layer face each other.

11. An electronic member or an optical member comprising the gas barrier pressure-sensitive adhesive sheet according to claim 1.

12. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 2, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

13. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 3, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

14. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 4, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

15. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 5, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

16. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 6, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

17. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 7, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

18. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 8, the method comprising forming a pressure-sensitive adhesive layer or a gas barrier layer on a release side of a release sheet.

19. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 2, the method comprising:

a step 1 that forms a gas barrier layer on a release side of a first release sheet to obtain a release sheet provided with the gas barrier layer;

a step 2 that forms a pressure-sensitive adhesive layer on a release side of a second release sheet to obtain a release sheet provided with the pressure-sensitive adhesive layer; and

a step 3 that bonds the release sheet provided with the gas barrier layer and the release sheet provided with the pressure-sensitive adhesive layer so that the gas barrier layer and the pressure-sensitive adhesive layer face each other.

20. A method for producing the gas barrier pressure-sensitive adhesive sheet according to claim 3, the method comprising:

a step 1 that forms a gas barrier layer on a release side of a first release sheet to obtain a release sheet provided with the gas barrier layer;

a step 2 that forms a pressure-sensitive adhesive layer on a release side of a second release sheet to obtain a release sheet provided with the pressure-sensitive adhesive layer; and

a step 3 that bonds the release sheet provided with the gas barrier layer and the release sheet provided with the pressure-sensitive adhesive layer so that the gas barrier layer and the pressure-sensitive adhesive layer face each other.