Sumitomo Chemical Company, Limited

Yasuro Suzuki

Yuki Iseki

Kenji Nagaoka

Kaoru Kitadono

Takashi Sanada

Nobuo Oi

Hiroomi Abe

Kuniaki Asai

Hideo Shinonaga

Satoru Sogabe

Hiroshi Hagimori

Tadahiro Mitsuno

Takeshi Fujii

Tatsuya Miyatake

Hayato Kihara

Teruo Saito

Kiyoshi Mitsui

Kenzo Chikanari

Masakazu Inoue

Yasuhito Ijichi

Takashi Anbo

Kei Kagiya

The object is to provide a method for producing a film excellent in a quality of odorless or free from deteriorating taste of food contained in a package of the extruded molded article by using an ethylene-&#x3b1;-olefin copolymer excellent in extrusion molding processability. This object is achieved by a method for producing an extruded molded article comprising a step of extruding a copolymer of ethylene and &#x3b1;-olefin of from 3 to 20 carbon atoms having an activation energy for melt flow of not less than 50 kJ/mol under one of the following conditions:

Method for producing an extruded molded article of ethylene polymer and the film

An object of the present invention is to provide an ethylene-&#x3b1;-olefin copolymer excellent in extrusion molding processability and in the balance between the appearance and impact strength. This object is achieved by a copolymer of ethylene and &#x3b1;-olefin of from 4 to 20 carbon atoms having melt flow rate (MFR; unit is g/10 minutes), melt tension at 190&#xb0; C. (MT; unit is cN), intrinsic viscosity ([&#x3b7;]; unit is dl/g), the chain length A and characteristic relaxation time at 190&#xb0; C. (&#x3c4;; unit is sec) which satisfy the specific relations.

Ethylene copolymer

The invention provides an ethylene-&#x3b1;-olefin copolymer which is superior in extrusion molding processability. The present invention is to provide a copolymer of ethylene and &#x3b1;-olefin of from 4 to 20 carbon atoms, having melt flow rate of from 1 to 100 g/10 min, an activation energy for melt flow of 60 kJ/mol or more, melt tension at 190&#xb0; C. (MT), intrinsic viscosity ([&#x3b7;]) and a chain length A which satisfy the formula (1) to (3), wherein the chain length A is a chain length at peak position of a logarithm normal distribution curve of a component having the highest molecular weight among logarithm normal distribution curves obtained by dividing a chain length distribution curve obtained by gel permeation chromatography measurement into at least two logarithm normal distribution curves.

A copolymer of (a)ethylene and/or an &agr;-olefin, (b) a cyclic olefin and (c) an alkenyl aromatic hydrocarbon, having acyclic olefin content of 0.01 to 66 mol % and a styrene content of 3 to 99 mol %, wherein the styrene content is more than a half of the cyclic olefin content, a process for producing the copolymer with a specific catalyst and a molded article made from the copolymer. The copolymer and molded article thereof are transparent, and excellent in flexibility and heat resistance.

Copolymer, process for the production thereof, and molded article thereof

An &agr;-olefin-alkenyl aromatic hydrocarbon-diene copolymer, a process for producing the copolymer, which comprises copolymerizing an &agr;-olefin, a mono-alkenyl aromatic hydrocarbon and a diene in the presence of a specific catalyst, and a molded article comprising the copolymer.

&agr;-olefin-based copolymer, process for the production thereof, and molded article comprising the same

Ethylene-alkenyl aromatic compound copolymer, process for the production thereof, and molded article thereof

Ethylene-based polymer

Method of producing inflation film and said film

A resin composition having an improved recycling property comprising;

Resin composition having improved recycling property

A thermoplastic resin composition having excellent appearance and moldability contains:

Thermoplastic resin compositions comprising blends of polyphenylene

There is provided a polymer composition having improved discoloration resistance upon exposure to light comprising a polyphenylene ether, a polyamide, and a combination of (a), a inorganic filler selected from the group consisting of titanium oxide, zinc oxide, zinc sulfide, aluminum oxide, magnesium oxide, titanium oxide coated mica, and metal particles, and (b), an organic dye or pigment which bleaches upon exposure to light, in an amount effective to improve the discoloration resistance.

Thermoplastic composition

A resin composition having improved resistance to discoloration caused by exposure to light, which comprises (a) 5-95% by weight of a polyphenylene ether alone or in combination with a styrene polymer, (b) 95-5% by weight of a polyamide, and based on 100 parts by weight of the sum of (a) and (b), (c) 0.01-30 parts by weight of one or more agents to improve the compatibility of a polyphenylene ether and a polyamide, (d) 0-50 parts by weight of one or more agents to improve the impact resistance, and (e) 0.1-15 parts by weight of metal particles having 10 .mu.m or less of weight average particle size and 3 or more of aspect ratio, and 60% by weight or more of (e) metal particles being included in (b) a polyamide.

Thermoplastic resin composition

Disclosed is a thermoplastic resin composition which comprises:

Thermoplastic resin compositions comprising polyphenylene ether,

The present invention provides a resin composition which is excellent in adhesion to coatings and which comprises the following components:

A surface treatment method of a polyamide resin composition molded article is disclosed, comprising bringing the surface of a polyamide resin composition molded article into contact with water, said polyamide resin composition molded article comprising (C) 100 parts by weight of a resin composition comprising (A) from 10 to 80% by weight of a polyamide resin and (B) from 20 to 90% by weight of other thermoplastic resin; and (D) from 0 to 20 parts by weight of at least one modifier selected from a carboxylic acid having at least 2 carboxyl groups in the molecule or a derivative thereof, an amine containing at least 2 nitrogen atom in the molecular, urea or a derivative thereof, and a low-molecular weight polyamide. A coating method of a polyamide resin composition molded article is also disclosed, comprising, after bringing the surface of a resin composition molded article into contact with water, coating the surface with a coating composition.

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Kisarazu, Japan

Yasuro Suzuki