Toray Industries, Inc.

Kazusada Takeda

Kei Watanabe

Yosuke Nishimura

Hiroshi Takezaki

Hisashi Miyama

Mikiya Nishida

Koji Yamauchi

Shunsuke Horiuchi

Shu Kaiho

Akinori Kanomata

Kei Makita

Junya Suzuki

A polyarylene sulfide resin particulate has a mean particle diameter from more than 1 &#x3bc;m to 100 the uniformity is 4 or less, the melt viscosity measured at temperature of 300&#xb0; C. and shear rate of 1216 secis 150 to 500 Pa&#xb7;s, and the recrystallization temperature, defined as temperature of the heat generation peak at the time of crystallization when cooled from 340&#xb0; C. to 50&#xb0; C. at 20&#xb0; C./min using a differential scanning calorimeter, is 150 to 210&#xb0; C. The polyarylene sulfide resin particulate is suitable as a material powder for producing a three-dimensional molding by a powder sintering three-dimensional printer can be provided efficiently.

Polyarylene sulfide resin particulate and method of producing same

A method of producing polybutylene terephthalate resin shaped moldings includes supplying a 3D printer with a polybutylene terephthalate resin powder mixture that contains 100 parts by weight of a polybutylene terephthalate resin powder material having a mean diameter of more than 1 &#x3bc;m and 100 &#x3bc;m or less, a uniformity coefficient of 4 or less, and a terminal carboxyl group quantity of 35 eq/t or more and 50 eq/t or less, and 0.1 to 5 parts by weight of inorganic particles having a mean diameter of 20 to 500 nm.

Polybutylene terephthalate resin powder mixture

A polyarylene sulfide resin powder/grain composition in which 100 weight parts of polyarylene sulfide resin powder/grain material whose average particle diameter exceeds 1 &#x3bc;m and is less than or equal to 100 &#x3bc;m and whose uniformity degree is less than or equal to 4 has been blended with 0.1 to 5 weight parts of an inorganic fine particle having an average particle diameter greater than or equal to 20 nm and less than or equal to 500 nm.

Polyarylene sulfide resin powder/grain composition and method of producing same

A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability.

Production method of polyarylene sulfide, cyclic polyarylene sulfide pellet and production method thereof

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Tokai, Japan

Kazusada Takeda