Chisso Corporation

Hideo Nobuhara

Jun Saito

Hitoshi Sato

Akira Yamauchi

Shingo Kikukawa

Masahiko Taniguchi

Kazuhiro Kimura

Yoshitaka Morimoto

Tadashi Tanaka

Yasuhiro Shiraishi

Osamu Yamaguchi

Hiroyuki Maehara

Toshiki Yamamoto

Hirohisa Ishii

Junichiro Yokota

Tooru Fukazawa

Masataka Sugimoto

Yasuhiko Nakagawa

Shigenori Fukuda

Shouji Kawano

Yoichi Kugimiya

Yuichi Yamanaka

Hiroaki Ito

A filter cartridge formed by winding, in a twill construction, a band-shaped unwoven cloth, which contains thermoplastic fibers and at least a part of its fiber intersections are stuck thereon, so that a cylindrical shape can be obtained, wherein 1. two types of filtrating layers are used, 2. unwoven cloth having opening hole parts is used, 3. an end face seal part is provided on both end parts of the cartridge, 4. unwoven cloth having a tongue piece part is used, or 5. two or more pieced of unwoven cloth are wound simultaneously, whereby those characteristic of the filter cartridge such as liquid permeability, filterable life, and stability of filtration accuracy can be kept in balance with each other.

Filter cartridge

A plastic molded product of olefin (co)polymer composition comprises 0.01-5.0 weight parts high molecular weight polyethylene with an intrinsic viscosity &eegr; in the range of 15-100 dl/g measured in 135&deg; C. tetralin and preferably 100 weight parts polypropylene. The high molecular weight polyethylene has an average particle size in the range of 1-5000 nm and is finely dispersed as fine granules in the polypropylene, so that high melt strength and high crystallization temperature are attained, enabling various molding methods to be performed with high speed productivity. Using the polymer composition, plastics such as a resin foam, a film, a sheet, a layered plastic article with a coated substrate surface, a hollow plastic article, an injection molded plastic article, a fiber, a nonwoven web or a continuous tube-shaped plastic are provided. The olefin (co)polymer composition is obtained by preparing high molecular weight polyethylene granules using e.g. a titanium transition metal compound catalyst, and adding these, e.g. as a polymerization catalyst of propylene, singly or together with a polyolefin preparing catalyst.

Molded resin articles

Disclosed is a catalyst for olefin (co-)polymerization comprising a transition metal compound catalytic component which contains at least a titanium compound and an &agr;-olefin (co-)polymer (A) supported by the catalyst, wherein said &agr;-olefin (co-)polymer (A) has an intrinsic viscosity (&eegr;) of 15 dl/g to 100 dl/g measured in tetrahydronaphthalene at 135&deg; C., and the content of said olefin (co-)polymer (a) is 0.01 to 5000 g for 1 g of the transition compound catalytic component.

Catalyst for olefin (co-)polymerization and method for producing the same

Polyolefin composition and method of making

Growing community of inventors

Otsu, Japan

Hideo Nobuhara