Mitsui Chemicals, Inc.

Isao Washio

Hiroki Ebata

Yuji Ishii

Nobuhiro Takizawa

Akinori Amano

Hideto Ogasawara

Fumio Kageyama

Kouichi Sano

Kaoru Minagawa

Toshitaka Kosaka

Yohei Hotani

Kohei Nishino

This polyamide resin composition contains: 30-89.9 parts by mass of a polyamide resin (A) having a melting point of at least 300&#xb0; C.; 0-45 parts by mass of a polyamide resin (B) having substantially no melting point; 0.1-5 parts by mass of a light-transmitting pigment (C); and 10-55 parts by mass of a fibrous filler (D) (the total amount of (A), (B), (C), and (D) is 100 parts by mass). The polyamide resin (A) contains at least a terephthalic acid-derived component unit. In a molded body of the polyamide resin composition, the corrected heat of fusion (&#x394;HR) is 10-70 J/g, and the transmittance of laser light having a wavelength of 940 nm is at least 15% at a thickness of 1.6 mm.

Polyamide resin composition, molded body thereof, and method for manufacturing laser-welded body

The problem of the invention is to provide a semi-aromatic polyamide resin composition having high rigidity, exceptional impact resistance, and exceptional zygosity with very little change in hardness associated with heating and cooling, as well as a molded article of this semi-aromatic polyamide resin composition. A semi-aromatic polyamide resin composition containing a semi-aromatic polyamide resin (A), acid-modified polyolefin resin (B), and fibrous filler (C), wherein the resin (A) contains a certain amount or more of terephthalic acid component units relative to the total number of moles of dicarboxylic acid component units, the semi-aromatic polyamide resin composition contains a certain amount or more of the resin (B), the glass transition temperature of the semi-aromatic polyamide resin composition is within a predetermined range, and the Vicat softening point of the resin (B) is within a predetermined range, is used as the semi-aromatic polyamide resin composition in order to solve this problem.

Semi-aromatic polyamide resin composition and molded article of same

The purpose of the present invention is to provide a polyester resin with improved mechanical properties, molding performance, and, preferably, fire retardancy. This polyester resin composition contains the following: a polyester resin (A) that has a melting point or glass transition temperature of at least 250&#xb0; C.; a thermoplastic resin (B) that has an olefin-derived constitutional unit and an aromatic hydrocarbon structure and has an intrinsic viscosity ([&#x3b7;]), as measured in decalin at 135&#xb0; C., of 0.04 to 1.0 dl/g; and a copolymer (C) that has an olefin-derived constitutional unit, an &#x3b1;,&#x3b2;-unsaturated-carboxylic-ester-derived constitutional unit, and a cyclic oxy-hydrocarbon structure.

Polyester resin composition, manufacturing method therefor, and camera module containing said polyester resin composition

To provide: a semiaromatic polyamide which has excellent moldability, heat resistance, chemical resistance and mechanical characteristics; and a molded article of this semiaromatic polyamide. A semiaromatic polyamide (I) of the present invention contains 35-50% by mole of a structural unit derived from terephthalic acid [A], 25-40% by mole of a structural unit derived from isophthalic acid [B], 15-35% by mole of a structural unit derived from an aliphatic dicarboxylic acid [C] (provided that the total of [A], [B] and [C] is 100% by mole), and a structural unit derived from an aliphatic diamine [D] having 4-12 carbon atoms. The molar ratio ([A]/[B]) is from 65/35 to 50/50, and the molar ratio ([C]/[B]) is from 30/70 to 50/50. The melting enthalpy ([increment]H) of the semiaromatic polyamide (I) as determined by differential scanning calorimetry (DSC) is 20-40 mJ/mg, and the intrinsic viscosity of the semiaromatic polyamide (I) is 0.7-1.6 dl/g.

Semiaromatic polyamide, semiaromatic polyamide resin composition, and molded article

The present invention provides a semi-aromatic polyamide resin composition having exceptional impact resistance, fuel barrier properties, and injection moldability, as well as a molded article containing the same, through a semi-aromatic polyamide resin composition containing specific proportions of (A) a semi-aromatic polyamide comprising a dicarboxylic acid component comprising terephthalic acid and adipic acid and a diamine component having a linear aliphatic diamine having 4-10 carbon atoms, (B) a semi-aromatic polyamide comprising a dicarboxylic acid component having isophthalic acid and a diamine component having an aliphatic diamine having 4-15 carbon atoms, (C) an olefin polymer containing a specific amount of functional group structural units, and (D) a fibrous filler.

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Chiba, Japan

Isao Washio