- 专利标题: Expanded thermoplastic polyurethane particles and expanded thermoplastic polyurethane particle molded article
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申请号: US16463755申请日: 2017-11-15
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公开(公告)号: US11208537B2公开(公告)日: 2021-12-28
- 发明人: Tatsuya Hayashi , Nobumasa Koshita , Masaharu Oikawa
- 申请人: JSP Corporation
- 申请人地址: JP Tokyo
- 专利权人: JSP Corporation
- 当前专利权人: JSP Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Fitch, Even, Tabin & Flannery LLP
- 优先权: JPJP2016-230178 20161128
- 国际申请: PCT/JP2017/041051 WO 20171115
- 国际公布: WO2018/096997 WO 20180531
- 主分类号: C08J9/232
- IPC分类号: C08J9/232 ; C08J9/20
摘要:
The present invention provides expanded beads of thermoplastic polyurethane, wherein the thermoplastic polyurethane constituting the expanded beads is an ether-based thermoplastic polyurethane, and a difference (T1−T2) between a melting peak temperature (T1) and a melting peak temperature (T2) is from 0 to 8° C., wherein the melting peak temperature (T1) is a melting peak temperature at the time of first heating in a DSC curve obtained by heating the expanded beads from 20° C. to 260° C. at a heating rate of 10° C./min, the melting peak temperature (T2) is a melting peak temperature at the time of second heating in a DSC curve obtained by cooling from 260° C. to 20° C. at a cooling rate of 10° C./min after the first heating and further heating again from 20° C. to 260° C. at a heating rate of 10° C./min, and the DSC curves are obtained by the heat flux differential scanning calorimetry in conformity with JIS K7121-1987. The expanded beads of thermoplastic polyurethane not only have excellent surface appearance and fusion bonding properties but also have a low shrinkage factor.
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