Invention Grant
- Patent Title: Expanded particle of noncrosslinked polyethylene-based resin and expansion molded article of noncrosslinked polyethylene-based resin
- Patent Title (中): 非交联聚乙烯类树脂的膨胀颗粒和非交联聚乙烯类树脂的发泡成型品
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Application No.: US13521655Application Date: 2011-01-14
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Publication No.: US08779019B2Publication Date: 2014-07-15
- Inventor: Kiyotaka Nakayama
- Applicant: Kiyotaka Nakayama
- Applicant Address: JP Osaka
- Assignee: Kaneka Corporation
- Current Assignee: Kaneka Corporation
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2010-007234 20100115
- International Application: PCT/JP2011/000164 WO 20110114
- International Announcement: WO2011/086938 WO 20110721
- Main IPC: C08J9/16
- IPC: C08J9/16 ; C08J9/00 ; C08J9/18 ; C08J9/232
Abstract:
A noncrosslinked polyethylene resin expanded particle is provided having a bulk density BD in a range of 10 g/L to 100 g/L, the particle being obtained by expanding a polyethylene resin particle whose density is in a range of 0.920 g/cm3 to 0.940 g/cm3, the noncrosslinked polyethylene resin expanded particle having a shrinkage factor in a range of 2% to 30%, the shrinkage factor being obtained by the following formula (1): Shrinkage Factor =(BD−VBD)×100/VBD (1), wherein: the BD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at 0.1 MPa (at a normal atmospheric pressure); and the VBD of the noncrosslinked polyethylene expanded particle is a bulk density at 23° C. and at a reduced pressure of 0.002 MPa or less.
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