Molded foam

Patent metadata

Field	Value
Publication number	US-2016333159-A1
Application number	US-201415107968-A
Country	US
Kind code	A1
Filing date	Dec 8, 2014
Priority date	Dec 27, 2013
Publication date	Nov 17, 2016
Grant date	—

Abstract

A molded foam that can be easily taken out of split mold blocks is provided. According to an aspect of the present disclosure, a molded foam is obtained by clamping, with split mold blocks, foamed resin obtained by melting and kneading a polyethylene-based resin, wherein the molded foam has a MFR (190° C., g/10 min) of less than 0.8, or the polyethylene-based resin has a MFR (190° C., g/10 min) of not more than 1.0.

First claim

1 . A molded foam molded by clamping, by split mold blocks, a foamed resin obtained by melting and kneading a polyethylene-based resin,
wherein the molded foam has a MFR (190° C., g/10 min) of less than 0.8.

2 . A molded foam molded by clamping, by split mold blocks, a foamed resin obtained by melting and kneading a polyethylene-based resin,
wherein the polyethylene-based resin has a MFR (190° C., g/10 min) of not more than 1.0.

3 . The molded foam according to claim 1 , wherein:
the foamed resin contains a first polyethylene-based resin and a second polyethylene-based resin at a mixture ratio of the first polyethylene-based resin to the second polyethylene-based resin=X:Y (where X+Y=100); and a MFR obtained by subjecting the MFR of the first polyethylene-based resin and the MFR of the second polyethylene-based resin to a calculation process at the mixture ratio satisfies Expression 1:
A×X/ 100+ B×Y/ 100≦1.0  Expression 1

wherein
A is the MFR of the first polyethylene-based resin;
B is the MFR of the second polyethylene-based resin;
X is a mixture ratio of the first polyethylene-based resin forming the foamed resin; and
Y is a mixture ratio of the second polyethylene-based resin forming the foamed resin.

4 . The molded foam according to claim 3 , wherein:
the first polyethylene-based resin is a high-density polyethylene-based resin; and the second polyethylene-based resin is a low-density polyethylene-based resin.

5 . The molded foam according to claim 4 , wherein the low-density polyethylene-based resin is manufactured by autoclave process.

6 . The molded foam according to claim 2 , wherein:
the foamed resin contains a first polyethylene-based resin and a second polyethylene-based resin at a mixture ratio of the first polyethylene-based resin to the second polyethylene-based resin=X:Y (where X+Y=100); and a MFR obtained by subjecting the MFR of the first polyethylene-based resin and the MFR of the second polyethylene-based resin to a calculation process at the mixture ratio satisfies Expression 1:
A×X/ 100+ B×Y/ 100≦1.0  Expression 1

wherein
A is the MFR of the first polyethylene-based resin;
B is the MFR of the second polyethylene-based resin;
X is a mixture ratio of the first polyethylene-based resin forming the foamed resin; and
Y is a mixture ratio of the second polyethylene-based resin forming the foamed resin.

7 . The molded foam according to claim 6 , wherein:
the first polyethylene-based resin is a high-density polyethylene-based resin; and the second polyethylene-based resin is a low-density polyethylene-based resin.

8 . The molded foam according to claim 7 , wherein the low-density polyethylene-based resin is manufactured by autoclave process.

Assignees

• Kyoraku Co Ltd

Inventors

• Onodera Masaaki
• Sano Takeru

Classifications

• B29L2031/30

  Vehicles, e.g. ships or aircraft, or body parts thereof {(vanes or blades B29L2031/08, air bags B29L2022/027)} · CPC title

• C08J2323/06

  Polyethene · CPC title

• C08J9/0061 Primary

  characterized by the use of several polymeric components · CPC title

• C08F10/02

  Ethene · CPC title

• B29K2105/04

  cellular or porous · CPC title