Polypropylene stretched film
Granted 16 Jul 1991 · no office action yet
Current assignee: Sumitomo Chemical Company, Limited · originally Sumitomo Chemical
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Attorney: Attorney · Log in to unlock
Inventors: Seiichiro Ima, Tadatoshi Ogawa, Kazuki Wakamatsu · Examiner: Carman J. Seccuro
Life of the patent
3 dated eventsAbstract
The polypropylene stretched film of the present invention is prepared by stretching a composition comprising a crystalline propylene polymer and 0.1 ppm by weight to 10% by weight of a nucleating agent, the composition having a melting point of 160.degree. C. or more, a crystallization temperature of 128.degree. C. or more and a 20.degree. C. xylene soluble portion of 3.0% by weight or less. The film has a high rigidity and a beautiful appearance as well as the characteristic properties inherent to crystalline propylene polymers. The film can be suitably used for food packaging and textile packaging.
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