Foamed resin molded article

Patent metadata

Field	Value
Publication number	US-11530309-B2
Application number	US-201816650164-A
Country	US
Kind code	B2
Filing date	Sep 27, 2018
Priority date	Sep 29, 2017
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

A foamed resin molded article (1) including: a foamed resin layer (30) comprising a first resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit and an aromatic vinyl monomer unit, and a blowing agent; and a non-foamed resin layer (50) covering the foamed resin layer (30), wherein: the non-foamed resin layer (50) comprises a second resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit, and an aromatic vinyl monomer unit; and the amount of the rubber component in the non-foamed resin layer (50), determined by pyrolysis-gas chromatography/mass spectrometry (PGC/MS), is 1% by mass or more and 30% by mass or less, based on the total mass of the second resin.

First claim

The invention claimed is:

1. A foamed resin molded article comprising:
a foamed resin layer comprising a first resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit and an aromatic vinyl monomer unit, and a blowing agent, and
a non-foamed resin layer covering the foamed resin layer,
wherein:
the non-foamed resin layer comprises a second resin which is a copolymer including a rubber component, a vinyl cyanide monomer unit, and an aromatic vinyl monomer unit,
an amount of the rubber component in the non-foamed resin layer, determined by pyrolysis-gas chromatography/mass spectrometry (PGC/MS), is 5% by mass or more and 15% by mass or less, based on a total mass of the second resin;
each of the first resin and the second resin is an acrylonitrile-butadiene-styrene copolymer (ABS resin);
the foamed resin molded article is a joint having a bent flow path inside; and
the foamed resin molded article does not break in an expansion/contraction fatigue resistance test under the conditions that a stress F of 700 kg weight is applied once per second for at least 1,000 times.

2. The foamed resin molded article according to claim 1 , wherein the non-foamed resin layer further comprises an acrylic resin.

3. The foamed resin molded article according to claim 1 , wherein the joint is an L-shaped pipe joint or a T-shaped three-way pipe joint.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Hisashuku Daiki
• Matsunaga Tamotsu
• Hanaki Hiroaki

Classifications

• B32B2250/24

  All layers being polymeric · CPC title

• B32B2270/00

  Resin or rubber layer containing a blend of at least two different polymers · CPC title

• B32B2307/304

  Insulating · CPC title

• B32B2266/0228

  Aromatic vinyl resin, e.g. styrenic (co)polymers · CPC title

• B32B2597/00

  Tubular articles, e.g. hoses, pipes · CPC title