Method for manufacturing polypropylene film and sheet

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – By calendering

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264211, 264349, 425363, 525240, 524449, 524494, 523348, B29C 4324

Patent

active

054396280

ABSTRACT:
The present invention is directed at polypropylene compositions containing a high level of filler, at a calendering process which uses the compositions to produce polypropylene films and sheets, and at the film or sheet produced from that process. The process of manufacturing polypropylene film involves formulating a polypropylene composition containing a resin, filler, matrix modifier, and processing aid. The resin comprises polypropylene resin ranging in concentration from about 100 to about 70 parts per hundred parts by weight of resin (PHR), and polyethylene resin ranging in concentration from about 0 to 30 PHR. The matrix modifier amounts to about 2 to 40 PHR. The filler ranges in concentration from about 0 to 450 PHR. The processing aid ranges in concentration for about 0 to 5.0 PHR. The composition is then mixed to obtain a homogeneous and plasticized mixture. Next, the mixture is calendered into a film using a calender unit having a multiplicity of rolls, the rolls having a surface temperature between 200.degree. C. and 250.degree. C. After calendering, the film is removed using take-off rolls and cooled to ambient temperature.

REFERENCES:
patent: 2462331 (1949-02-01), Myers
patent: 3184526 (1965-05-01), Klug
patent: 3328503 (1987-06-01), Ancker
patent: 3553302 (1971-01-01), Susuki et al.
patent: 3660551 (1972-05-01), Susuki
patent: 3775521 (1973-11-01), Yamamoto et al.
patent: 3993718 (1976-11-01), Bontinck
patent: 4014636 (1977-03-01), Pawelczyk
patent: 4124563 (1978-11-01), Onozuka
patent: 4144430 (1979-03-01), Dereppe
patent: 4148780 (1979-04-01), Blumel et al.
patent: 4311658 (1982-01-01), Nicoll
patent: 4345046 (1982-08-01), Ejk et al.
patent: 4615853 (1986-10-01), Aoyama et al.
patent: 4695239 (1987-09-01), Klepsch et al.
patent: 5063005 (1991-11-01), Doheny, Jr.
patent: 5264174 (1993-11-01), Takei et al.

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