Floor carpet for vehicles and method for producing same

Patent metadata

Field	Value
Publication number	US-10596944-B2
Application number	US-201715848681-A
Country	US
Kind code	B2
Filing date	Dec 20, 2017
Priority date	Jan 11, 2017
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

The vehicle floor carpet of the present invention includes a skin layer, a thermoplastic resin layer, and a base layer in this order, the thermoplastic resin layer has a plurality of open hole parts penetrating through the thermoplastic resin layer in the thickness direction, and the open hole parts are arranged on recesses in a surface of the skin layer or recesses in a surface of the base layer at the side of the thermoplastic resin layer.

First claim

The invention claimed is:

1. A vehicle floor carpet comprising:
a skin layer, a thermoplastic resin layer, and a base layer in this order;
a plurality of internal recesses formed on at least one of a surface of the skin layer and a surface of the base layer at a side interfacing with the thermoplastic resin layer, wherein the plurality of internal recesses are present in the at least one of the surface of the skin layer and the surface of the base layer because a material comprising at least one of the skin layer and the base layer is a fiber material, and
a thermoplastic resin layer having a melt flow rate in a range from 2 to 100 g/10 minutes and a plurality of thermally-formed cavities penetrating through the thermoplastic resin layer in the thickness direction,
wherein the thermally-formed cavities are formed to extend from the plurality of formed internal recesses, respectively, due to an increased thermal conductivity within the plurality of internal recesses.

2. The vehicle floor carpet according to claim 1 ,
wherein a permeability is in a range from 5 to 30 cc/cm 2 /sec.

3. The vehicle floor carpet according to claim 1 ,
wherein a basis weight of the thermoplastic resin layer is in a range from 50 to 150 g/m 2 .

4. The vehicle floor carpet according to claim 1 ,
wherein the melt flow rate is 4 or higher and less than 50 g/10 min.

5. The vehicle floor carpet according to claim 4 ,
wherein the melt flow rate is 5 or higher and less than 10 g/10 min.

6. The vehicle floor carpet according to claim 1 ,
wherein the fiber material of the skin layer and/or base layer is a nonwoven fabric.

7. The vehicle floor carpet according to claim 1 ,
wherein the thermoplastic resin layer is formed from a thermoplastic resin comprising at least one of a polyethylene, a polypropylene, and an ethylene-vinyl acetate resins.

8. The vehicle floor carpet according to claim 7 ,
wherein the polyethylene resin is a low density polyethylene (LDPE).

9. A method for producing the vehicle floor carpet according to claim 1 , comprising the steps of:
(a) forming a laminate including the skin layer, the thermoplastic resin layer, and the base layer in this order;
(b) heating the laminate to form the plurality of thermally-formed cavities penetrating through the thermoplastic resin layer in the thickness direction; and
(c) press-molding the laminate having thermally-formed cavities,
wherein the step (a) forms the laminate in which the skin layer and base layer are bonded via the thermoplastic layer so that non-contact parts are formed at least one of an interface between the skin layer and the thermoplastic resin layer and an interface between the thermoplastic resin layer and the base layer.

10. The method for producing the vehicle floor carpet according to claim 9 ,
wherein a film forming temperature for the thermoplastic resin layer in the step (a) is in a range from 200° C. to 220° C.

11. The method for producing the vehicle floor carpet according to claim 9 ,
wherein a basis weight of the thermoplastic resin layer in the step (a) is in a range from 50 to 150 g/m 2 .

Assignees

• Toyota Boshoku Kk
• Otsuka Corp

Inventors

• Hattori Atsuhiro
• Kawai Kazunori

Classifications

• B32B37/1284

  Application of adhesive · CPC title

• B32B38/0036

  Heat treatment (for heating or cooling of layers during lamination B32B37/06, B32B37/08) · CPC title

• D06N7/0081

  with at least one extra fibrous layer at the backing, e.g. stabilizing fibrous layer, fibrous secondary backing · CPC title

• B60N3/048 Primary

  characterised by their structure · CPC title

• D06N2209/121

  Permeability to gases, adsorption · CPC title