Fabric-like material for reinforcement in urethane foam molding, and method for producing urethane foam molded body utilizing same

Patent metadata

Field	Value
Publication number	US-11084192-B2
Application number	US-201716315095-A
Country	US
Kind code	B2
Filing date	Jun 30, 2017
Priority date	Jul 4, 2016
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A fabric-like material for reinforcement in an urethane foam molding is obtained by impregnating a part of a surface of a nonwoven fabric of organic fibers with a hot melt magnetic material and immobilizing the hot melt magnetic material. The hot melt magnetic material satisfies compositions described below and has a softening point of 70 to 100° C.Ethylene-vinyl acetate copolymer (A): 10 to 95% by mass.Wax (B): 0 to 30% by mass.Magnetic powder (C): 5 to 70% by mass.(The total of (A), (B) and (C) is 100% by mass.).

First claim

The invention claimed is:

1. A material for reinforcement in urethane foam molding obtained by impregnating a part of a surface of a nonwoven fabric with a hot melt magnetic material and immobilizing the hot melt magnetic material,
wherein the hot melt magnetic material satisfies compositions described below and has a softening point of 70 to 100° C.:
Ethylene-vinyl acetate copolymer (A): 10 to 95 parts by mass
Wax (B): 0 to 30 parts by mass
Magnetic powder (C): 5 to 70 parts by mass;
wherein the total of the components (A), (B) and (C) is 100 parts by mass.

2. The material for reinforcement in urethane foam molding according to claim 1 , wherein the hot melt magnetic material satisfies compositions described below:
Ethylene-vinyl acetate copolymer (A): 30 to 95 parts by mass
Wax (B): 0 parts by mass
Magnetic powder (C): 5 to 70 parts by mass;
wherein the total of the components (A), (B) and (C) is 100 parts by mass.

3. The material for reinforcement in urethane foam molding according to claim 1 , wherein the hot melt magnetic material satisfies compositions described below:
Ethylene-vinyl acetate copolymer (A): 10 to 80 parts by mass
Wax (B): 3 to 30 parts by mass
Magnetic powder (C): 5 to 70 parts by mass
wherein the total of the components (A), (B) and (C) is 100 parts by mass.

4. The material for reinforcement in urethane foam molding according to claim 1 ,
wherein the content of vinyl acetate is 20 to 45 parts by mass with respect to 100 parts by mass of the ethylene-vinyl acetate copolymer (A).

5. The material for reinforcement in urethane foam molding according to claim 1 ,
wherein the melt peak temperature of the ethylene-vinyl acetate copolymer (A) is 50 to 70° C.

6. A method for producing a urethane foam molded body utilizing the material for reinforcement in urethane foam molding according to claim 1 , comprising:
fixing the material for reinforcement in urethane foam molding on a molding surface of a shaping mold, which contains magnets buried in some predetermined positions, due to magnetic force,
injecting a urethane resin into the shaping mold and foaming the urethane resin to integrally mold the urethane resin with the material for reinforcement in urethane foam molding, and
removing a urethane foam molded body obtained by foam molding from the shaping mold.

Assignees

• Toyota Boshoku Kk
• Mold Technical Office Co Ltd
• Toyo Ink Sc Holdings Co Ltd
• Toyo Adl Corp
• Toyochem Co Ltd

Inventors

• Murata Yoshiyuki
• Inuzuka Kensuke
• Iwasawa Toshio
• Hara Kenichi
• Senaga Takafumi

Classifications

• C08J5/04

  Reinforcing macromolecular compounds with loose or coherent fibrous material · CPC title

• B29C44/1271 Primary

  the preformed parts being partially covered · CPC title

• D06M23/08

  Processes in which the treating agent is applied in powder or granular form (adhesives for multi-layer textile fabrics D06M17/00) · CPC title

• D06M15/333

  of vinyl acetate; Polyvinylalcohol · CPC title

• B29C39/10

  incorporating preformed parts or layers, e.g. casting around inserts or for coating articles {(coating a surface by casting in general B05D1/30, B29C39/126 takes precedence)} · CPC title