Polyplastics Co., Ltd.

Mineo Ohtake

Toshio Shiwaku

Masato Suzuki

Toshio Nakane

Haruji Murakami

Kazuhito Kobayashi

Shigeru Nezu

Keiichi Kanaka

Hirokazu Ohshiba

Takayuki Miyashita

Akehide Shimoda

A purpose of the present invention is to obtain a hollow extruded article by easy blow molding or extrusion molding to give a draw down resistance and a uniform wall thickness of the article without damaging low gas permeability which is a characteristic property of a liquid-crystalline polymer. A resin composition for extrusion molding which is prepared by melting and kneading 99-70 wt. % of wholly aromatic polyester amide liquid crystal resin (A) having a melting point of 270-370&#xb0; C. and a melt viscosity at 1000/sec. shear rate of 20-60 Pa&#xb7;s at Temperature T1 which is higher than 20&#xb0; C. from said melting point, and containing (I) 1-15 mole % of 6-hydroxy-2-naphthoic acid residue, (II) 40-70 mole % of 4-hydroxybenzoic acid residue, (III) 5-28.5 mole % of aromatic diol residue, (IV) 1-20 mole % of 4-aminophenol residue, and (V) 6-29.5 mole % of aromatic dicarboxylic acid residue; and 1-30 wt. % of epoxy modified polyolefin type resin (B), and has a melt viscosity at 1000/sec. shear rate of 60-4000 Pa&#xb7;s at said Temperature T1, and a melt tensile strength of 20 mN or more at 14.8 m/min. draw rate is used.

Resin composition for extrusion molding and extrusion-molded article

The present invention provides a liquid crystalline resin composition capable of readily blow-molding a molded article having uniform thickness, with the addition of good blow-moldability owing to the improved drawdown-resistant property, the improved melt-tension increase rate, and other properties without deteriorating the low gas-permeability which is a characteristic of liquid crystalline resin. Specifically, it provides a liquid crystalline resin composition for blow molding, obtainable by melt-kneading: (A) 100 parts by weight of a melt-processable aromatic polyester and/or polyester amide, which can form an anisotropic molten phase; (B) 10 to 25 parts by weight of a styrene-based copolymer composed of 40 to 97% by weight of a styrene group, 60 to 3% by weight of a specific glycidyl ester of &#x3b1;,&#x3b2;-unsaturated acid and 0 to 50% by weight of other vinyl-based monomer, wherein the styrene-based copolymer has epoxy equivalents ranging from 300 to 3000 g/eq, and weight average molecular weights of 30000 or more; and (C) 0 to 100 parts by weight of one or more of fibrous filler, powdery or granular filler, and plate-like filler.

Liquid crystalline resin composition for blow molding

To provide a resin composition, in which a liquid crystal polymer is made into fiber in a molded article to exhibit an extremely high reinforcing effect which has not been available yet, and from which a molded article having an excellent mechanical strength can be manufactured in a stable manner. That is, a thermoplastic resin composition, wherein 100 parts by weight in total consisting of 99-50 parts by weight of a thermoplastic polyester resin (A) not forming an anisotropic molten phase and 1-50 parts by weight of a liquid crystal polymer (B) capable of forming an anisotropic molten phase is blended with 0.001-2.0 parts by weight of one or more kinds of compounds (C) selected from phosphorus oxoacid monoester and diester represented by the following formulae (I) and (II):(X)P(&#x2550;O) (OR)&#x2003;&#x2003;(I)(X)P(OR)&#x2003;&#x2003;(II)wherein n is 1 or 2; X is a hydrogen atom, a hydroxyl group or a monovalent organic group and, when there are plural X's, they may be the same or different; and R is a monovalent organic group and, when there are plural R's, they may be the same or different.

Thermoplastic resin composition and molded object thereof

Liquid-crystalline polymer composition

To provide a material improved in dimensional accuracy and reduced in the extent of deformation caused by warpage without suffering from a serious reduction in mechanical properties such as flexural properties, and suitable for connectors which have a ratio (L/t) of the length (L) of the product to the average thickness (t) thereof of at least 100 and a ratio (L/h) of the length (L) of the product to the height (h) thereof of at least 10. A liquid crystal polymer composition for connectors, having a ratio (L/t) of the length (L) of the product to the average thickness (t) thereof of at least 100 and a ratio (L/h) of the length (L) of the product to the height (h) thereof of not exceeding 10, which is obtained by blending 100 parts by weight of a liquid crystal polymer (A) with 5 to 100 parts by weight of a fibrous filler (B) having an average fiber diameter of 0.5 to 20 &mgr;m and an average aspect ratio of 10 or less and 5 to 100 parts by weight of a particulate filler (C) having an average particle diameter of 0.1 to 50 &mgr;m, the total amount of the fillers not exceeding 150 parts by weight.

Liquid crystal polymer composition for connectors and connector

Flame-retardant thermoplastic resin composition and products of injection molding thereof

A molding having a high transparency and a surface hardness of B or higher in terms of pencil hardness, is provided by blow molding process employing no orientation step. A high-hardness transparent polyester molding, obtained by quenching and carrying out non-orientation blow molding of a polyester resin or a composition thereof in a molten state, and subsequent crystallization thereof in a specific temperature range.

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Shizuoka, Japan

Mineo Ohtake