The present invention relates to: a liquid crystal polyester resin composition which contains a liquid crystal polyester resin and carbon fibers with a sizing agent; and a method for producing this liquid crystal polyester resin composition. The content of the carbon fibers with a sizing-agent is from 5 parts by mass to 120 parts by mass relative to 100 parts by mass of the liquid crystal polyester resin. With respect to the carbon fibers with a sizing-agent, the adhesion amount of the sizing agent with respect to the carbon fibers is from 0.1 parts by mass to 1.2 parts by mass relative to 100 parts by mass of the carbon fibers. If the carbon fibers with a sizing agent are heated from 25° C. to 400° C. in the air at a heating rate of 50° C./min, the mass loss rate within the range from 300° C. to 400° C. is less than 0.8% by mass.

The present invention relates to an injection molded product including a thermoplastic resin and a fibrous filler, wherein the thermoplastic resin includes at least 10% by mass of at least one selected from the group consisting of polypropylene and liquid crystal polyesters based on the total amount of the thermoplastic resin, the proportion of the fibrous filler having a fiber length of 1 mm or less in the injection molded product is 40% by mass or less based on the total amount of the fibrous filler, and a vertical-horizontal plane area of a test piece after ashing, which is determined by a specific ashing test, is at least 3.5 times the vertical-horizontal plane area of the test piece before ashing.

The present invention relates to a liquid crystal polyester resin molded article containing a thermoplastic resin comprising a liquid crystal polyester and a fibrous filler, in which the liquid crystal polyester resin molded article contain the fibrous filler in an amount of equal to or greater than 1 part by mass and equal to or smaller than 120 parts by mass with respect to 100 parts by mass of the thermoplastic resin, the proportion of the liquid crystal polyester with respect to 100 mass % of the thermoplastic resin is equal to or greater than 75 mass % and equal to or smaller than 100 mass %, and a length-weighted average fiber length of the fibrous filler is equal to or greater than 0.7 mm.

Liquid crystal polyester resin pellets containing a liquid crystal polyester and pitch-based carbon fibers, in which a length-weighted average fiber length of the pitch-based carbon fibers is equal to or greater than 100 μm, and the liquid crystal polyester has an interfacial shear strength of equal to or greater than 30 MPa with a single fiber of pitch-based carbon fibers after a sizing agent is removed, which is measured by a single fiber pull-out method; and a liquid crystal polyester resin molded article containing a liquid crystal polyester and pitch-based carbon fibers, in which a length-weighted average fiber length of the pitch-based carbon fibers is equal to or greater than 100 μm, and the liquid crystal polyester has an interfacial shear strength of equal to or greater than 30 MPa with a single fiber of pitch-based carbon fibers after a sizing agent is removed, which is measured by a single fiber pull-out method.

Provided is a biopolymer composition, a preparation method for the same, and a bioplastic using the same, the biopolymer composition comprising at least 83.5 weight% of a copolymer resin of lactic acid (LA) and 3- hydroxypropionate (3HP), an antioxidant, and a lubricant, and the composition having an elongation percentage of at least 90% but not greater than 500%.

An acrylic rubber excellent in water resistance and a method for producing the same are provided. An acrylic rubber composed of: 70 to 99.9 wt % of a bonding unit derived from (meth) acrylic acid ester; 0.1 to 10 wt % of a bonding unit derived from a cross-linkable monomer; and if necessary, 0 to 20 wt % of a bonding unit derived from another monomer, wherein the ash content is 0.5 wt % or less, the total amount of magnesium and phosphorus in the ash is 30 wt % or more, a ratio of the magnesium to the phosphorus ([Mg]/[P]) by weight is 0.4 to 2.5, and Mooney viscosity (ML1+4, 100° C.) of the rubber is 10 to 150 is particularly excellent in water resistance, and a rubber cross-linked product using the same is also excellent in physical properties.

A method of melt blending a polypropylene and the melt blended polypropylene therefrom, comprising providing a base-polypropylene having a MFR of less than 15 g/10 min and a molecular weight distribution (Mw/Mn) within the range from 5 to 16, and comprising hindered phenol and phosphorous-type antioxidants, and within the range from 5 ppm to 4000 ppm of an alkyl radical scavenger relative to the total weight of the components to form a melt blended polypropylene; melt blending the melt blended polypropylene at a temperature of at least 210° C.; and isolating a melt blended, melt blended polypropylene.

An extruder includes a screw for extruder provided with a screw element for kneading a raw material, and a barrel including a cylinder portion in which the screw is inserted so as to be rotatable. A plurality of screw elements identical with the screw element are provided in a longitudinal direction of the screw under a certain rule. The barrel is integrated by combining a plurality of barrel blocks blocked. Each of the plurality of barrel blocks is configured in accordance with a length of the screw element provided in the longitudinal direction of the screw.

In the field of tire production, systems and methods make it possible to selectively carry out monopassage and multipassage rubber production sequences in a common rubber production facility. A tire is formed according to the methods described.

A polyurethane composition including a first and a second component, wherein the first component is a polyol with an OH functionality in the range from 1.5 to 4 and a mean molecular weight in the range from 250 to 15,000 g/mol, a diol with two hydroxyl groups which are linked via a C2 to C0 carbon chain, and a compound that includes at least one thiol group. One of the two components also additionally contains at least one metal catalyst for the reaction of hydroxyl groups and isocyanate groups which can form thio complexes, and the second component contains enough polyisocyanate that at least 5% by weight of isocyanate groups, in relation to the total polyurethane composition, are contained, and the molar ratio of all thiol groups of the mentioned compound to all metal atoms of the metal catalyst is between 1:1 and 250:1.