Gas barrier film laminate and electronic component

Patent metadata

Field	Value
Publication number	US-9796156-B2
Application number	US-201214234805-A
Country	US
Kind code	B2
Filing date	Jul 6, 2012
Priority date	Jul 25, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The invention relates to a gas barrier film laminate comprising at least two gas barrier films and a pressure-sensitive adhesive layer, the at least two gas barrier films being stacked through the pressure-sensitive adhesive layer, at least one of the at least two gas barrier films including a base formed of a plastic film, and at least one gas barrier layer provided on the base, and the pressure-sensitive adhesive layer being a layer formed using a rubber-based pressure-sensitive adhesive composition that includes a rubber-based compound. The invention also relates to an electronic member comprising the gas barrier film laminate. The gas barrier film laminate exhibits a high water vapor barrier capability, and does not show interfacial lifting at the end thereof.

First claim

The invention claimed is:

1. A gas barrier film laminate comprising at least two gas barrier films and a pressure-sensitive adhesive layer,
wherein the at least two gas barrier films are formed on the same side or opposing sides of the pressure-sensitive adhesive layer,
at least one of the at least two gas barrier films includes a base formed of a plastic film, and at least one gas barrier layer provided on the base,
the pressure-sensitive adhesive layer being a layer formed using a rubber-based pressure-sensitive adhesive composition that includes (i) a polyisobutylene-based resin as a rubber-based compound and (ii) a benzotriazole-based UV absorber,
a material for forming the base formed of the plastic film is a polymer selected from the group consisting of polyimides, polyamides, polyamide-imides, polyphenylene ether, polyether ketone, polyether ether ketone, polyesters, polycarbonates, polysulfones, polyether sulfones, polyphenylene sulfides, polyallylates, acrylic resins, cycloolefin polymers, aromatic polymers, and combinations thereof,
the at least one gas barrier layer provided on the base is a polymer layer that includes a part modified by ion implantation, wherein the polymer layer comprises silicon-based polymer compounds,
the water vapor transmission rate of the pressure-sensitive adhesive layer at a temperature of 40° C. and a relative humidity of 90% is 25 g/m 2 /day or less, when the thickness of the pressure-sensitive adhesive layer is 50 μm,
the water vapor transmission rate of the gas barrier film laminate at a temperature of 40° C. and a relative humidity of 90% is 0.001 g/m 2 /day or less,
the visible light transmittance of the gas barrier film laminate at a wavelength of 500 nm is 80% or more,
the UV cut ratio of the gas barrier film laminate at a wavelength of 350 nm is 94% or more, and
the yellowness index (Y1) of the gas barrier film laminate is 4 or less.

2. The gas barrier film laminate according to claim 1 , wherein at least one gas barrier layer is formed on one side of the pressure-sensitive adhesive layer and another gas barrier layer is formed on the other side of the pressure-sensitive adhesive layer.

3. The gas barrier film laminate according to claim 1 , wherein the benzotriazole-based UV absorber is a compound selected from the group consisting of 1,2,3-benzotriazole, 1-[N,N-bis(2-ethylhexyl)aminomethyl]benzotriazole, carboxybenzotriazole, 2-[2-hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, 2-(2-hydroxy-4-octylphenyl)-2H-benzotriazole, 2-(2′-hydroxy-3′,5′-di-tert-butylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′-tert-butyl-5′-methylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′-tert-amyl-5′-isobutylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′-isobutyl-5′-methylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′-isobutyl-5′-propylphenyl)-5-chlorobenzotriazole, 2-(2′-hydroxy-3′,5′-di-tert-butylphenyl)benzotriazole, 2-(2′-hydroxy-5′-methylphenyl)benzotriazole, and 2-[2′-hydroxy-5′-(1,1,3,3-tetramethyl)phenyl]benzotriazole.

4. The gas barrier film laminate according to claim 1 , wherein an amount of the benzotriazole-based UV absorber is 6 to 30 parts by mass based on 100 parts by mass of the pressure-sensitive adhesive layer.

5. The gas barrier film laminate according to claim 1 , further comprising a polybutene resin.

6. The gas barrier film laminate according to claim 1 , wherein a weight average molecular weight of the rubber-based compound is 10,000 to 3,000,000.

7. The gas barrier film laminate according to claim 1 , further comprising a cyclic olefin-based polymer.

8. The gas barrier film laminate according to claim 7 , wherein an amount of the cyclic olefin-based polymer in the rubber-based pressure-sensitive adhesive composition is 5 to 50 mass % on a solid basis.

9. The gas barrier film laminate according to claim 1 , wherein the water vapor transmission rate of the pressure-sensitive adhesive layer at a temperature of 40° C. and a relative humidity of 90% is 15 g/m 2 /day or less, when the thickness of the pressure-sensitive adhesive layer is 50 μm.

10. The gas barrier film laminate according to claim 1 , wherein the visible light transmittance of the gas barrier film laminate at a wavelength of 500 nm is 89% or more.

11. The gas barrier film laminate according to claim 1 , wherein the UV cut ratio of the gas barrier film laminate at a wavelength of 350 nm is 97% or more.

12. The gas barrier film laminate according to claim 1 , wherein the yellowness index (Y1) of the gas barrier film laminate is 3.5 or less.

13. The gas barrier film laminate according to claim 1 , wherein a change in visible light transmittance of 0.1% or less, a change in yellowness index (Y1) of 0.2 or less, and a change in haze of 0.3 or less when the gas barrier film laminate is allowed to stand at a temperature of 60° C. and a relative humidity of 90% for 150 hours.

14. The gas barrier film laminate according to claim 1 , wherein the material for forming the base formed of the plastic film is polyamides or cycloolefin polymers.

15. The gas barrier film laminate according to claim 1 , wherein a thickness of the base is 5 to 200 μm.

16. The gas barrier film laminate according to claim 1 , wherein a thickness of the at least one gas barrier layer provided on the base is 40 to 500 nm.

17. The gas barrier film laminate according to claim 1 , wherein at least one of the silicon-based polymer compounds is a polysilazane-based compound.

Assignees

• Kenmochi Suguru
• Naganawa Satoshi
• Lintec Corp

Inventors

• Kenmochi Suguru
• Naganawa Satoshi

Classifications

• B32B2255/26

  Polymeric coating · CPC title

• B32B27/28

  comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42} · CPC title

• B32B2307/7244

  Oxygen barrier · CPC title

• B32B2457/00

  Electrical equipment · CPC title

• B32B27/36

  comprising polyesters · CPC title