发明名称 |
POLYPROPYLENE SHEET FOR PRESS-THROUGH PACKAGES, PRODUCTION PROCESS THEREOF, AND POLYPROPYLENE RESIN COMPOSITION |
摘要 |
Disclosed herein is a polypropylene sheet obtained by forming a resin composition, which contains a polypropylene resin and a hydrogenated petroleum resin in specific amounts, into a sheet at a particular chill-roll temperature and then annealing the sheet at a specific temperature for a specific period of time as well as an improved production process of such a polypropylene sheet. Also disclosed is a polypropylene sheet comprising a sheet obtained from the above resin composition and a polypropylene layer of at least 10 .mu.m thick applied on at least one side of the sheet. A polypropylene resin composition suitable for the production of such polypropylene sheets is also disclosed. The above polypropylene sheets are suitable for use in press-through packages. |
申请公布号 |
CA1293575(C) |
申请公布日期 |
1991.12.24 |
申请号 |
CA19860516558 |
申请日期 |
1986.08.21 |
申请人 |
MITSUI TOATSU CHEMICALS, INCORPORATED |
发明人 |
USAMI, KATSUYUKI;UEKI, TORU;SENTOKU, HAJIME;TAKAHASHI, TAKASHI;KANEZAKI, KAZUHARU |
分类号 |
B29D22/00 |
主分类号 |
B29D22/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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