Gas barrier adhesive sheet, method for producing same, electronic member, and optical member

Patent metadata

Field	Value
Publication number	US-9580625-B2
Application number	US-201214236494-A
Country	US
Kind code	B2
Filing date	Jul 25, 2012
Priority date	Aug 3, 2011
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Provided is a gas barrier pressure-sensitive adhesive sheet having 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 1.5×10 4 to 1.0×10 7 Pa, and the gas barrier pressure-sensitive adhesive sheet not including a base layer. Also, provided is the following: 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.

First claim

The invention claimed is:

1. A gas barrier pressure-sensitive adhesive sheet comprising at least one gas barrier layer, at least one pressure-sensitive adhesive layer, and at least one release sheet,
wherein the at least one pressure-sensitive adhesive layer has a storage modulus at 23° C. of 2.0×10 4 to 8.0×10 4 Pa and has a storage modulus at 80° C. of 7.8×10 3 to 2.3×10 4 Pa,
the gas barrier pressure-sensitive adhesive sheet having a substantial thickness of 0.5 to 50 μm, and
other than the release sheet, each layer included in the gas barrier pressure-sensitive adhesive sheet does not satisfy either requirement 1 or 2:
requirement 1: a paper or a plastic film having a thickness of 10 μm or more; and
requirement 2: a plastic film having a tensile modulus at 23° C. of 200 to 5000 MPa.

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/m 2 /day or less.

3. 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.

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

5. 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.

Assignees

• FUCHI Emi
• Kenmochi Suguru
• Naganawa Satoshi
• Nagamoto Koichi
• Lintec Corp

Inventors

• FUCHI Emi
• Kenmochi Suguru
• Naganawa Satoshi
• Nagamoto Koichi

Classifications

• C09J7/38 Primary

  Pressure-sensitive adhesives [PSA] · CPC title

• C09J2400/123

  in the substrate · CPC title

• C09J2203/326

  for bonding electronic components such as wafers, chips or semiconductors · CPC title

• Y10T428/1476

  Release layer · CPC title

• Y10T428/2848

  Three or more layers · CPC title