Composite sheet, substrate for a display element including same, and display device including same

Patent metadata

Field	Value
Publication number	US-9804428-B2
Application number	US-201214346623-A
Country	US
Kind code	B2
Filing date	Sep 19, 2012
Priority date	Sep 21, 2011
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention relates to a composite sheet, to a substrate for a display element including same, and to a display device including same. More specifically, the composite sheet comprises: a reinforcement-impregnated matrix; a coating layer formed on at least one surface of the matrix; and a barrier layer formed on at least one surface of the coating layer, wherein, if an elastic modulus of the matrix is E2 at a temperature of 25° C. and an elastic modulus of the coating layer is E3 at a temperature of 25° C., the ratio of the elastic modulus, i.e. E3/E2, is approximately 5×10 4 or less.

First claim

The invention claimed is:

1. A composite sheet comprising:
a matrix comprising at least one of a silicone resin, a styrene-butadiene rubber (SBR), a butadiene rubber, an isoprene rubber, a chloroprene rubber, a neoprene rubber, an ethylene-propylene-diene terpolymer, a styrene-ethylene-butylene-styrene (SEBS) block copolymer, a styrene-ethylene-propylene-styrene (SEPS) block copolymer, an acrylonitrile-butadiene rubber (NBR), a hydrogenated nitrile rubber (NBR), a fluorinated rubber, or a plasticized polyvinyl chloride;
a reinforcement material impregnated into the matrix;
a coating layer formed on at least one surface of the matrix; and
a barrier layer formed on at least one surface of the coating layer, wherein the coating layer is formed between the matrix and the barrier layer,
wherein, when the matrix has an elastic modulus at 25° C. of E2 and the coating layer has an elastic modulus at 25° C. of E3, a ratio of the elastic modulus E3/E2 is about 5×10 4 or less,
wherein the coating layer comprises at least one of acrylic resins, epoxy resins, urethane resins, and unsaturated polyester resins.

2. The composite sheet according to claim 1 , wherein the ratio of the elastic modulus E3/E2 ranges from about 10 to about 5×104.

3. The composite sheet according to claim 1 , wherein the coating layer comprises at least two layers having different elastic moduli at 25° C.

4. The composite sheet according to claim 1 , wherein the coating layer has a gradient elastic modulus structure.

5. The composite sheet according to claim 4 , wherein the coating layer is prepared through plasma treatment of a coating layer material which is an organic/inorganic hybrid solution prepared by sol/gel hydrolysis.

6. The composite sheet according to claim 1 , wherein the matrix has an elastic modulus at 25° C. of about 0.1 GPa or less.

7. The composite sheet according to claim 1 , wherein the coating layer has an elastic modulus at 25° C. from about 0.1 GPa to about 10 GPa.

8. The composite sheet according to claim 1 , wherein the barrier layer has an elastic modulus at 25° C. of about 10 GPa or more.

9. The composite sheet according to claim 1 , wherein when the matrix has a thickness of T2 and the coating layer has a thickness of T3, a ratio of the thicknesses T3/T2 ranges from about 1×10 −3 to about 5×10 −1 .

10. The composite sheet according to claim 1 , wherein the reinforcement material comprises at least one of glass fibers, glass fiber cloths, glass fabrics, nonwoven glass fabrics, glass meshes, glass beads, glass flakes, silica particles, and colloidal silica.

11. The composite sheet according to claim 1 , wherein the barrier layer comprises at least one of silicon nitride, silicon oxide, silicon carbide, aluminum nitride, aluminum oxide, ITO, and IZO.

12. A substrate for display elements comprising the composite sheet according to claim 1 .

13. A display comprising the substrate for display elements according to claim 12 .

Assignees

• Cheil Ind Inc
• Samsung Sdi Co Ltd

Inventors

• Chung Kyu Ha
• Kim Tae Ho
• Kim Sung Kook
• Kim Young Kwon
• Lee Sang Keol
• Kwak Byeong Do
• Im Sung Han
• Jeong Eun Hwan
• Choi Seok Won
• Kim Tae Jung
• Lee Woo Jin

Classifications

• B32B17/04

  bonded with or embedded in a plastic substance · CPC title

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02F1/133305 Primary

  Flexible substrates, e.g. plastics, organic film · CPC title

• B32B2307/51

  Elastic · CPC title

• Y10T428/24942

  including components having same physical characteristic in differing degree · CPC title