Tokuyama Corporation

Idemitsu Petrochemical Co., Ltd.

Manabu Kaminaka

Isao Masada

Hitoshi Matsuoka

Shinsuke Tanaka

Junichi Fujii

Motomu Takamura

Akira Aoki

Nobuhiko Nakayama

Naoki Ueda

Polyolefin resin modifier, polyolefin resin composition and oriented polyolefin film

A propylene resin composition featuring good flexibility and transparency without producing sticky feeling, and comprising a polypropylene component and a copolymer component of propylene and ethylene, wherein (I) the amount of the component (hereinafter referred to as medium- to low-temperature eluting component) that elutes out at temperatures of up to 90&deg; C. by the temperature rising elution fractionation method by using an o-dichlorobenzene solvent is from 50 to 99% by weight of the whole amount, the amount of the component (hereinafter referred to as high-temperature eluting component) that elutes out at temperatures of not lower than 90&deg; C. is from 50 to 1% by weight of the whole amount, and the amount of the component (hereinafter referred to as low-temperature eluting component) eluting out up to a temperature of 0&deg; C. is not larger than 10% by weight of the whole amount, and (II) the content of the ethylene units in the component eluting up to the temperature of 90&deg; C. is not smaller than 4% by weight but is smaller than 20% by weight, and the content of the propylene units in the component eluting at temperatures of not lower than 90&deg; C. is from 97 to 100% by weight.

Propylene resin composition, process for the preparation thereof, and use thereof

An at least monoaxially stretched polypropylene film made of a composition comprising a crystalline polypropylene and a monocyclic olefin polymer (e.g. a polycyclobutene or a polycyclopentene), wherein the content of the monocyclic olefin polymer is 0.1-1,000 ppm by weight. The polypropylene film is superior not only in transparency but also in image clarity by which an image is clearly seen through the film. The polypropylene film, when further comprising talc having an average particle diameter of 0.1-10 .mu.m in an amount of 50-4,000 ppm by weight, can prevent the surface roughening or edge roughening of sheet during the sheet formation conducted before stretched film production. The polypropylene film, when further comprising an anti-blocking agent and a polyethylene together, can prevent the generation of voids caused by the anti-blocking agent.

Stretched polypropylene film

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Tokuyama, Japan

Manabu Kaminaka