Laminate and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-11440303-B2
Application number	US-201816639585-A
Country	US
Kind code	B2
Filing date	Jun 11, 2018
Priority date	Aug 30, 2017
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

Disclosed is a laminate which includes one or more soft layers and an electronic device enclosed by the one or more soft layers, wherein the one or more soft layers have a flexural modulus of 80 MPa or more and 1,000 MPa or less and a water vapor permeability at 40° C. and 90% RH of 15 [g/(m2·24 h)·100 μm] or less.

First claim

The invention claimed is:

1. A laminate comprising a first soft layer, a second soft layer, a third soft layer, a fourth soft layer, and an electronic device enclosed by the first to fourth soft layers,
wherein the first to fourth soft layers each directly contact the electronic device,
the first soft layer is positioned on one side of the electronic device,
the second soft layer is positioned on the other side of the electronic device,
the first and second soft layers are different soft layers and each comprise a thermoplastic resin,
the thermoplastic resin comprises as a main component a modified hydrogenated block copolymer [E] in which an alkoxysilyl group is introduced to a hydrogenated block copolymer [D], the hydrogenated block copolymer [D] being obtained by hydrogenating a block copolymer [C] which comprises: a polymer block [A] which comprises as a main component a structural unit derived from an aromatic vinyl compound; and a polymer block [B] which comprises as a main component a structural unit derived from a chain conjugated diene compound, and
wherein the first to fourth soft layers have a flexural modulus of 80 MPa or more and 1,000 MPa or less and a water vapor permeability at 40° C. and 90% RH of 15 [g/(m 2 ·24h)·100 μm] or less.

2. The laminate of claim 1 , wherein the thermoplastic resin has a glass transition temperature or melting point of 90° C. or higher.

3. The laminate of claim 1 , wherein the hydrogenated block copolymer [D] is obtained by hydrogenating 90% or more of carbon-carbon unsaturated bonds of main chains and side chains and 90% or more of carbon-carbon unsaturated bonds of aromatic rings in the block copolymer [C].

4. The laminate of claim 1 , wherein at least one of the first to fourth soft layers comprises an ultraviolet absorber.

5. The laminate of claim 1 , wherein at least one of the first to fourth soft layers has a total light transmittance of 85% or more and a spectral light transmittance at 385 nm wavelength or less of 1% or less.

6. The laminate of claim 1 , wherein the first soft layer and the second soft layer are different in at least one of thickness, material, or color.

7. The laminate of claim 1 , wherein the first soft layer comprises an ultraviolet absorber, and the second soft layer does not comprise an ultraviolet absorber.

8. A method of manufacturing the laminate of claim 1 , comprising:
vacuum degassing a package in which a stack in which the electronic device is enclosed by the first to fourth soft layers is sealed in a packaging bag; and
making the laminate by heating and pressurizing the package subjected to the vacuum degassing,
wherein a relation of T4>T1≥T2≥T3 is satisfied, where T1 is a temperature of the heating, T2 is a glass transition temperature or melting point of the first to fourth soft layers, T3 is a Vicat softening temperature of the packaging bag, and T4 is a melting temperature of the packaging bag.

9. The method of manufacturing a laminate of claim 8 , wherein the packaging bag comprises one or more layers made of polyethylene resin.

Assignees

• Zeon Corp

Inventors

• Kurihara Ryuta
• Chiba Daido

Classifications

• H10W74/10

  characterised by their shape or disposition · CPC title

• H10W74/40

  characterised by their materials · CPC title

• B32B27/302 Primary

  comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers · CPC title

• B32B38/1858

  using vacuum · CPC title

• B32B27/28

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