Decorative sheet and method of producing decorative sheet

Patent metadata

Field	Value
Publication number	US-10899117-B2
Application number	US-201916399816-A
Country	US
Kind code	B2
Filing date	Apr 30, 2019
Priority date	Nov 29, 2016
Publication date	Jan 26, 2021
Grant date	Jan 26, 2021

Abstract

A decorative sheet including a substrate layer, and one or more layers of at least one of a transparent resin layer and a top coat layer provided on one surface of the substrate layer, the one or more layers being provided as a front surface layer, wherein at least one layer of the transparent resin layer and the top coat layer contains a radical scavenger, and the radical scavenger is contained in a form of radical scavenger vesicles, which encapsulate the radical scavenger within an outer membrane.

First claim

What is claimed is:

1. A decorative sheet, comprising:
a substrate layer, and
one or more layers of at least one of a transparent resin layer and a top coat layer provided on one surface of the substrate layer, the one or more layers being provided as a front surface layer,
wherein at least one layer which forms the front surface layer contains radical scavenger liposomes, wherein the radical scavenger liposome comprises a hindered amine-based photostabilizer as the radical scavenger encapsulated within a monolayer outer membrane made of phospholipid, wherein an amount of the radical scavenger liposomes is from 0.2 parts to 5.0 parts by mass per 100 parts per mass of a resin of the top coat layer and/or a resin of the transparent resin layer.

2. The decorative sheet of claim 1 , wherein the resin of the transparent resin layer is an olefin-based resin and the transparent resin layer contains the radical scavenger liposomes in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the transparent resin layer.

3. The decorative sheet of claim 1 , wherein the resin of the top coat layer is an urethane-based resin and the top coat layer contains the radical scavenger liposomes in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the top coat layer.

4. The decorative sheet of claim 1 , wherein the hindered amine-based photostabilizer is encapsulated within the monolayer outer membrane made of phospholipid via a supercritical reverse phase evaporation process.

5. The decorative sheet of claim 1 , wherein
the transparent resin layer and the top coat layer formed on the transparent resin layer are provided as the front surface layer,
an embossed pattern is formed on a surface of the transparent resin layer facing the top coat layer, and
the top coat layer is at least embedded in a recess of the embossed pattern.

6. The decorative sheet of claim 1 , wherein
the transparent resin layer and the top coat layer are provided as the front surface layer, and
the transparent resin layer and the top coat layer each contain an ultraviolet absorbent.

7. The decorative sheet of claim 1 , wherein
at least the transparent resin layer is provided as the front surface layer, and
an ink layer containing a photostabilizer is provided as an underside layer of the transparent resin layer.

8. A decorative sheet, comprising:
a substrate layer, and
one or more layers of at least one of a transparent resin layer and a top coat layer provided on one surface of the substrate layer, the one or more layers being provided as a front surface layer,
wherein at least one layer which forms the front surface layer is formed by adding radical scavenger liposomes, wherein the radical scavenger liposome comprises a hindered amine-based photostabilizer as the radical scavenger encapsulated within a monolayer outer membrane made of phospholipid, to a resin constituting the at least one layer which forms the front surface layer, wherein an amount of the radical scavenger liposomes is from 0.2 parts to 5.0 parts by mass per 100 parts per mass of a resin of the top coat layer and/or a resin of the transparent resin layer.

9. The decorative sheet of claim 8 , wherein the resin of the transparent resin layer is an olefin-based resin and the radical scavenger liposomes are added to the transparent resin layer in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the transparent resin layer.

10. The decorative sheet of claim 8 , wherein the resin of the top coat layer is an urethane-based resin and the radical scavenger liposomes are added to the top coat layer in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the top coat layer.

11. The decorative sheet of claim 8 , wherein the hindered amine-based photostabilizer is encapsulated within the monolayer outer membrane made of phospholipid via a supercritical reverse phase evaporation process.

12. A method for producing a decorative sheet including a substrate layer, one or more layers of at least one of a transparent resin layer and a top coat layer provided on one surface of the substrate layer, the one or more layers being provided as a front surface layer, comprising
forming at least one layer of the front surface layer by adding radical scavenger liposomes, wherein the radical scavenger liposome comprises a hindered amine-based photostabilizer as the radical scavenger encapsulated within a monolayer outer membrane made of phospholipid, to a resin constituting the at least one layer which forms the front surface layer, wherein an amount of the radical scavenger liposomes is from 0.2 parts to 5.0 parts by mass per 100 parts per mass of a resin of the top coat layer and/or a resin of the transparent resin layer.

13. The method of claim 12 , wherein the resin of the transparent resin layer is an olefin-based resin and the radical scavenger liposomes are added to the transparent resin layer in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the transparent resin layer.

14. The method of claim 12 , wherein the resin of the top coat layer is an urethane-based resin and the radical scavenger liposomes are added to the top coat layer in the amount of from 0.2 parts to 5.0 parts by mass per 100 parts mass of the resin of the top coat layer.

15. The method of claim 12 , wherein the hindered amine-based photostabilizer is encapsulated within the monolayer outer membrane made of phospholipid via a supercritical reverse phase evaporation process.

16. The method for producing a decorative sheet of claim 12 , wherein
the transparent resin layer and the top coat layer formed on the transparent resin layer are provided as the front surface layer,
an embossed pattern is formed on a surface of the transparent resin layer facing the top coat layer, and
the top coat layer is at least embedded in a recess of the embossed pattern.

17. The method for producing a decorative sheet of claim 12 , wherein
the transparent resin layer and the top coat layer are provided as the front surface layer, and
an ultraviolet absorbent is added to each of a resin constituting the transparent resin layer and a resin constituting the top coat layer.

18. The method for producing a decorative sheet of claim 12 , wherein
at least the transparent resin layer is provided as the front surface layer, and
an ink layer containing a photostabilizer is provided as an underside layer of the transparent resin layer.

Assignees

• Toppan Printing Co Ltd

Inventors

• Shibayama Naoyuki
• Nagahama Masamitsu
• Sato Akira
• Takahashi Masatoshi

Classifications

• C09D7/48

  Stabilisers against degradation by oxygen, light or heat · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B33/00 Primary

  Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class · CPC title

• B32B29/06

  specially treated, e.g. surfaced, parchmentised · CPC title

• B32B29/002

  as the main or only constituent of a layer, which is next to another layer of the same or of a different material (next to a layer of a particular substance B32B9/06; next to a bituminous or tarry layer B32B11/06; next to a water-setting substance layer B32B13/08; next to a metal layer B32B15/12; next to a glass layer B32B17/065; next to a layer formed of natural mineral fibres or particles B32B19/046; next to a wood layer B32B21/06; next to a cellulosic plastic layer B32B23/06; next to a natural or synthetic rubber layer B32B25/06; next to a synthetic resin layer B32B27/10) · CPC title