Chisso Corporation

Other

Shinji Nakata

Takanori Nakashima

Yasuhiro Shiraishi

Shinichi Akitaya

Chikashi Okayama

Yuji Ando

Jun Saito

Tsutomu Ushioda

Mototake Tsutsui

Yoshitoyo Yasuda

Youichi Kugimiya

Hiroyuki Fujita

Yoshitaka Sumi

Yoshiyuki Ohgi

Hisanobu Minamizawa

Yasuhiro Mochizuki

Yuya Ishimoto

Naoshi Kawamoto

Katsuhiko Ohno

Kentaro Niijima

Atsuko Sawai

Ichiro Sakabe

Polypropylene resin composition and gas permeable film using the same

Propylene homopolymers or propylene-olefin copolymers, having at least one olefin selected from ethylene and &agr;-olefins having 4 or more carbon atoms where the propylene content in this copolymer is 98% by weight or more, are provided that are suitable for producing films with excellent antistatic performance, high rigidity and metallizability.

Propylene base polymer and a polypropylene film using the same

A breathing film comprising at least one layer obtained by processing a propylene resin composition including crystalline propylene polymer(A) and propylene/&agr;-olefin random copolymer(B) is provided, said film having anti-bacterial agent, and the ratio &lsqb;&eegr;&rsqb; /&lsqb;&eegr;&rsqb; of intrinsic viscosity &lsqb;&eegr;&rsqb; of propylene/&agr;-olefin random copolymer(B) and intrinsic viscosity &lsqb;&eegr;&rsqb; of crystalline propylene polymer(A) being 0.3 to 1.2, and said film having specified range of water vapor permeability, oxygen gas permeability and ethylene gas permeability.

Breathing film

Propylene/ethylene/&agr;-olefin terpolymers and processes for the production thereof

Film having gas permeability

An unoriented polypropylene-based film or sheet possessing excellent impact resistance at low temperature, transparency, heat resistance at low temperature and excellent tear strength and/or stress whitening resistance. A molding material which comprises a polypropylene-based resin material comprising 40 to 80% by weight of crystalline polypropylene and 60 to 20% by weight of propylene-&agr;-olefin copolymer containing 20 to 80% by weight of propylene polymerization units, the propylene-&agr;-olefin copolymer dispersed as particles in the crystalline polypropylene, is unoriently molded to afford a film-shaped or sheet-shaped molding, wherein the particle diameter have an aspect ratio (L/D) of mean dispersed particle length (L) to mean dispersed particle diameter along the thickness of the molding (D) of 30 or more in a cross section of the molding along the MD direction, and the mean dispersed particle diameter of 0.3 &mgr;m or less.

Unoriented polypropylene molding

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Ichihara, Japan

Shinji Nakata