Decorative sheet

Patent metadata

Field	Value
Publication number	US-2016176167-A1
Application number	US-201414910242-A
Country	US
Kind code	A1
Filing date	Jul 23, 2014
Priority date	Aug 19, 2013
Publication date	Jun 23, 2016
Grant date	—

Abstract

Provided is a decorative sheet which comprises a top surface layer, a rear surface layer and at least one intermediate layer between the top surface layer and the rear surface layer, wherein: the top surface layer and the rear surface layer each independently are formed from a first composite resin composition comprising a glycol-modified polyethylene terephthalate resin and an ester-based resin; the intermediate layer(s) is (are) formed from a second composite resin composition comprising a glycol-modified polyethylene terephthalate resin, a polyethylene terephthalate resin and an ester-based resin; the glass-transition temperature of the ester-based resin is lower than the glass-transition temperature of the glycol-modified polyethylene terephthalate resin; the glass-transition temperature of the ester-based resin is lower than the glass-transition temperature of the polyethylene terephthalate resin; and the content of the polyethylene terephthalate resin in the second composite resin composition is between about 5 and about 30 wt %.

First claim

1 . A decorative sheet comprising a top surface layer, a rear surface layer and at least one intermediate layer between the top surface layer and the rear surface layer,
wherein the top surface layer and the rear surface layer each independently are formed from a first composite resin composition comprising a glycol-modified polyethylene terephthalate resin, or a blend of a glycol-modified polyethylene terephthalate resin and an ester-based resin; the intermediate layer is formed from a second composite resin composition comprising a glycol-modified polyethylene terephthalate resin, a polyethylene terephthalate resin and an ester-based resin; the glass-transition temperature of the ester-based resin is lower than the glass-transition temperature of the glycol-modified polyethylene terephthalate resin; the glass-transition temperature of the ester-based resin is lower than the glass-transition temperature of the polyethylene terephthalate resin; and the content of the polyethylene terephthalate resin in the second composite resin composition is 5 to 30 wt %.

2 . The decorative sheet of claim 1 , wherein the ester-based resin comprises at least one selected from the group consisting of polybutylene terephthalate, polytrimethylene terephthalate, and a combination thereof.

3 . The decorative sheet of claim 1 , wherein the content of the ester-based resin in the first composite resin composition is 0 to 20 wt %.

4 . The decorative sheet of claim 1 , wherein the content of the ester-based resin in the second composite resin composition is 3 to 30 wt %.

5 . The decorative sheet of claim 1 , wherein the first composite resin composition and the second composite resin composition each have a glass-transition temperature of 72±10° C.

6 . The decorative sheet of claim 1 , wherein further comprising a pigment in at least one of the layers of the sheet.

7 . The decorative sheet of claim 6 , wherein the content of the pigment in the first composite resin composition or the second composite resin composition is 0.1 to 30 wt %.

8 . The decorative sheet of claim 1 , wherein the intermediate layer has a thickness of 1 to 20 times the thickness of the top surface layer.

9 . The decorative sheet of claim 1 , wherein the rear layer has a thickness of 1 to 2 times the thickness of the top surface layer.

10 . The decorative sheet of claim 1 , wherein the decorative sheet has the total thickness of 200 μm to 1000 μm.

11 . The decorative sheet of claim 1 , wherein the decorative sheet has a moldable temperature of 55° C. to 80° C.

12 . The decorative sheet of claim 1 , wherein further comprising a hard coating layer on the top surface layer.

13 . The decorative sheet of claim 11 , wherein the hard coating layer comprises at least one selected from the group consisting of methyl methacrylate, hydroxyethyl methacrylate, methacrylate, ethyl acrylate, and a combination thereof.

Assignees

• Lg Hausys Ltd

Inventors

• Shin Chang-Hak
• Park Hwan-Seok
• Lee Jong-Hun
• Yue Seong-Hoon
• Kwon Dong-Joo
• Park Ku-Il
• Hwang Deok-Ryul
• Song Yea-Ri

Classifications

• B32B2307/584

  Scratch resistance · CPC title

• B32B2250/244

  All polymers belonging to those covered by group B32B27/36 · CPC title

• B32B2307/306

  Resistant to heat · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title

• B32B27/20

  using fillers, pigments, thixotroping agents · CPC title