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.
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申请公布号 |
US4869938(A) |
申请公布日期 |
1989.09.26 |
申请号 |
US19860899491 |
申请日期 |
1986.08.22 |
申请人 |
MITSUI TOATSU CHEMICALS INC. |
发明人 |
USAMI, KATSUYUKI;UEKI, TORU;SENTOKU, HAJIME;TAKAHASHI, TAKASHI;KANEZAKI, KAZUHARU |
分类号 |
B29C47/00;B29D7/01;C08L23/12 |
主分类号 |
B29C47/00 |
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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