Kao Corporation

Panasonic Corporation

Tokai Chemical Industries, Ltd.

Tomoya Tsuboi

Masahiro Mori

Hiroki Sawada

Akira Takenaka

Tadanori Yoshimura

Jouji Hirai

Yoshiro Oda

Suguru Nakao

Takashi Nagashima

Yoshinori Hasegawa

Mari Azumi

Akihiro Onoue

A method for manufacturing a thermoplastic resin composition enabling easy control of the weight average molecular weight of a thermoplastic resin used in a soluble three-dimensional modeling support material, the support material having sufficient strength even when used in the manufacture of a three-dimensional object by an FDM system 3D printer, being less colored with excellent appearance quality, and having a high dissolution speed in neutral water and quickly removable from a precursor of the three-dimensional object without using a strong alkaline aqueous solution; and the thermoplastic resin having dicarboxylic acid monomer units derived from a dicarboxylic acid component and having a proportion of an aromatic dicarboxylic acid monomer unit derived from a sulfonic acid group and/or sulfonate group-containing aromatic dicarboxylic acid component in the dicarboxylic acid monomer units of 10 mol % or more; the method including mixing an organic salt compound represented by formula (I):(R&#x2014;SO)X&#x2003;&#x2003;(I).

Method for manufacturing thermoplastic resin composition

The present invention is a soluble material for three-dimensional modeling that is used as a material of a support material for supporting a three-dimensional object when the three-dimensional object is manufactured by a 3D printer of a fused deposition modeling system and that contains a thermoplastic resin having a hydrophilic group and an organic salt compound represented by a general formula (I) below: (R&#x2014;SO)X(I). According to the present invention, it is possible to provide a soluble material for three-dimensional modeling that is used for a support material and that is capable of suppressing the degradation of the modeling accuracy of a three-dimensional object when the three-dimensional object is manufactured by a 3D printer of a fused deposition modeling system, and has a high rate of dissolution to neutral water to be removable speedily from a precursor of the three-dimensional object without use of a strong alkaline aqueous solution.

Soluble material for three-dimensional molding

A polyamide resin composition for a vibration-damping material, containing a polyamide resin, a plasticizer in an amount of from 7 to 35 parts by mass, and one or more members selected from the group consisting of plate-like fillers and acicular fillers in an amount of from 15 to 80 parts by mass, based on 100 parts by mass of the polyamide resin. The polyamide resin composition of the present invention can be suitably used as a vibration-damping material for a material for audio equipment such as, for example, speakers, television, radio cassette players, headphones, audio components, or microphones, and manufactured articles such as electric appliances, transportation vehicles, construction buildings, and industrial equipment, or parts or housing thereof.

Polyamide resin composition for damping material

A material for audio equipment housing containing a polylactic acid resin composition containing a polylactic acid resin, a plasticizer, an organic crystal nucleating agent, and an inorganic material, wherein the content of the plasticizer is from 1 to 50 parts by mass based on 100 parts by mass of the polylactic acid resin; and a vibration-damping material containing a polylactic acid resin composition containing a polylactic acid resin, a plasticizer, an organic crystal nucleating agent, and an inorganic material, wherein the content of the plasticizer is from 1 to 50 parts by mass based on 100 parts by mass of the polylactic acid resin. The material of the present invention can be suitably used as materials for audio equipment of, for example, speakers, television, radio cassette players, headphones, audio components, or microphones, and manufactured articles, such as electric appliances, transportation vehicles, construction buildings, and industrial equipment, or parts or housing thereof.

Vibration damping material

A polylactic acid resin composition containing a polylactic acid resin, glass fibers having an average aspect ratio (average fiber length/average fiber diameter) of 5 or more, and a metallic pigment, wherein the glass fibers are contained in an amount of from 2 to 35 parts by mass, and the metallic pigment is contained in an amount of from 0.1 to 8 parts by mass, based on 100 parts by mass of the polylactic acid resin. Since the polylactic acid resin composition of the present invention has excellent moldability, and is capable of providing a molded article with high designability, including a transparent surface layer and an inner layer with a lamellar texture in the nashiji patterns, the polylactic acid resin composition can be suitably used in various industrial applications, such as daily sundries, household electric appliance parts, packaging materials for household electric appliance parts, and automobile parts.

Polylactic acid resin composition

A method for producing a polylactic acid resin composition, including the following steps (1) and (2): step (1): subjecting an organic crystal nucleating agent to a wet pulverization in the presence of a carboxylic acid ester having a weight-average molecular weight of from 150 to 600 and a viscosity at 23&#xb0; C. of from 1 to 500 mPa&#xb7;s and/or a phosphoric ester having a weight-average molecular weight of from 150 to 600 and a viscosity at 23&#xb0; C. of from 1 to 500 mPa&#xb7;s to give a finely pulverized organic crystal nucleating agent composition; and step (2): melt-kneading a raw material for a polylactic acid resin composition comprising the finely pulverized organic crystal nucleating agent composition obtained in the step (1) and a polylactic acid resin.

Growing community of inventors

Sakai, Japan

Tomoya Tsuboi