Thermoplastic resin sheet having hairlike bodies and molded product thereof

Patent metadata

Field	Value
Publication number	US-11904518-B2
Application number	US-201716318874-A
Country	US
Kind code	B2
Filing date	Jul 20, 2017
Priority date	Jul 20, 2016
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

[Problem] The objective of the present invention is to provide a sheet expressing a good tactile sensation and a molded product thereof.[Solution] A sheet expressing a good tactile sensation and a molded product thereof are provided by configuring a thermoplastic resin sheet having a base layer and hairlike bodies arranged regularly on at least one surface thereof, wherein a continuous phase is formed without a structural boundary between the base layer and the hairlike bodies.

First claim

The invention claimed is:

1. A thermoplastic resin sheet having hairlike bodies arranged regularly on at least one surface of a base layer, wherein:
a continuous phase is formed without a structural boundary between the base layer and the hairlike bodies;
the average height of the hairlike bodies is more than 100 μm and no greater than 1,200 μm;
the average diameter of the hairlike bodies is no less than 1 μm and no greater than 50 μm;
the average spacing of the hairlike bodies is no less than 20 μm and no greater than 60 μm, wherein the average spacing of the hairlike bodies is a distance from a center of a root of a hairlike body to a center of a root of a neighboring hairlike body; and
the average thickness of the base layer is no less than 50 μm and no greater than 1000 μm.

2. The thermoplastic resin sheet according to claim 1 , wherein the thermoplastic resin is a thermoplastic resin using at least one of a styrene based resin, an olefin based resin, a polyvinyl chloride resin, a thermoplastic elastomer, a fluorine based resin, a polyester based resin, and a nylon based resin.

3. The thermoplastic resin sheet according to claim 1 , wherein the ratio of the static friction coefficient of the surface having the hairlike bodies with respect to the dynamic friction coefficient thereof is 1.0-10.0.

4. The thermoplastic resin sheet according to claim 1 , wherein the heat transfer speed of the surface having the hairlike bodies is 0.005-0.500 J/cm′ sec.

5. The thermoplastic resin sheet according to claim 1 , configured such that the hairlike bodies extend in a direction away from the base layer and a swelling is formed at the tips of the hairlike bodies.

6. The thermoplastic resin sheet according to claim 1 , wherein the base layer and the hairlike bodies are formed from a single sheet.

7. The thermoplastic resin sheet according to claim 1 , wherein the resin sheet is a multilayer resin sheet.

8. The thermoplastic resin sheet according to claim 1 , wherein at least one substrate layer selected from a styrene based resin, an olefin based resin, a polyester based resin, a nylon based resin, an acrylic based resin, and a thermoplastic elastomer is laminated on the other surface of the base layer.

9. The thermoplastic resin sheet according to claim 1 , comprising one or more additives selected from a water and oil repellent, an antistatic agent, and an antibacterial agent.

10. A manufacturing method for the thermoplastic resin sheet according to claim 1 , wherein the hairlike bodies are formed by casting, with a transfer roll on which an embossing process has been performed and a touch roll, a sheet that has been melt-extruded from a die with an extrusion molding technique.

11. A molded product of the thermoplastic resin sheet according to claim 1 .

12. The molded product according to claim 11 , which is a stationery member.

13. The molded product according to claim 11 , which is an automobile interior member, an electronic device, an electronic device cladding, a cosmetic container, or a container member that is vacuum/pressure molded on a surface of an existing molded product.

Assignees

• Denka Company Ltd

Inventors

• Fujiwara Junpei
• Hirokawa Yasushi
• Osawa Tomohiro

Classifications

• B29C48/002 Primary

  combined with surface shaping · CPC title

• B29C48/07

  Flat, e.g. panels · CPC title

• B29C51/10 Primary

  Forming by pressure difference, e.g. vacuum · CPC title

• B29C59/04

  using rollers or endless belts · CPC title

• B32B3/26

  characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids {(foam layer B32B5/18; layer of synthetic resin characterised by fillers that create voids or cavities B32B27/205); characterised by an apertured layer} · CPC title