Invention Grant
- Patent Title: Polyethylene resin foamed particles, polyethylene resin in-mold foam-molded article, and production methods thereof
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Application No.: US15038056Application Date: 2014-11-19
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Publication No.: US10351688B2Publication Date: 2019-07-16
- Inventor: Akihiro Itoi
- Applicant: Kaneka Corporation
- Applicant Address: JP Osaka
- Assignee: KANEKA CORPORATION
- Current Assignee: KANEKA CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Osha Liang LLP
- Priority: JP2013-240176 20131120; JP2014-136454 20140702; JP2014-184790 20140911
- International Application: PCT/JP2014/080671 WO 20141119
- International Announcement: WO2015/076306 WO 20150528
- Main IPC: B29B9/10
- IPC: B29B9/10 ; C08J9/12 ; C08J9/16 ; C08J9/18 ; C08J9/00 ; C08J9/232 ; B29C35/04 ; B29C35/16 ; B29C44/34 ; B29K105/04

Abstract:
Polyethylene resin foamed particles are obtained by foaming polyethylene resin particles containing a base resin. The base resin is a linear polyethylene resin. The polyethylene resin particles have a storage elastic modulus of 900 Pa or more and 5000 Pa or less at an angular frequency of 1 rad/second and a storage elastic modulus of 100000 Pa or less at an angular frequency of 100 rad/second, in a dynamic viscoelasticity measurement at 190° C. A differential scanning calorimetry (DSC) curve obtained by heating the polyethylene resin foamed particles using a differential scanning calorimeter at a temperature rising speed of 10° C./minute within a range of 20° C. to 220° C. has two melting peaks of a melting peak on a low temperature side and a melting peak on a high temperature side.
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