Abstract: A polyarylene sulfide resin composition which yields a molded article with excellent toughness, as well as a molded article and an optical ferrule, which are produced using the polyarylene sulfide resin composition. In a polyarylene sulfide resin composition containing a polyarylene sulfide resin and silica particles, a specific amount of a polyarylene sulfide resin having a melt viscosity of 35 to 80 Pa·s, and a specific amount of silica particles having a lower content of coarse powders with a particle size of 45 ?m or more are employed.

Abstract: A polyacetal resin composition contains a polyacetal copolymer (A) in an amount of 100 parts by mass, the polyacetal copolymer resin having a hemiformal terminal group amount of 0.8 mmol/kg or less, an antioxidant (B) in an amount of 0.5 to 3.0 parts by mass, at least one of zinc oxide or magnesium oxide (C) having an average particle diameter of 5 ?m or less in an amount of more than 2.0 parts by mass and 12 parts by mass or less, carbon black (D) having a BET specific surface area of 300 to 400 m2/g in an amount of 5.0 to 16 parts by mass, and polyalkylene glycol (E) in an amount of 0.5 to 3.0 parts by mass.

Abstract: A transparent article is obtained by molding a cyclic olefin copolymer or a resin composition containing the cyclic olefin copolymer. The cyclic olefin copolymer is obtained by a process that at least includes a step of preparing a norbornene monomer and ethylene as monomers in a polymerization vessel and a step of polymerizing the monomers in the polymerization vessel in the presence of a metal-containing catalyst. The metal-containing catalyst satisfies predetermined conditions.

Abstract: A polyacetal resin composition contains a polyacetal copolymer (A) in an amount of 100 parts by mass, the polyacetal copolymer resin having a hemiformal terminal group amount of 0.8 mmol/kg or less, an antioxidant (B) in an amount of 0.5 to 3.0 parts by mass, at least one of zinc oxide or magnesium oxide (C) having an average particle diameter of 5 ?m or less in an amount of more than 2.0 parts by mass and 12 parts by mass or less, carbon black (D) having a BET specific surface area of 300 to 400 m2/g in an amount of 5.0 to 16 parts by mass, and polyalkylene glycol (E) in an amount of 0.5 to 3.0 parts by mass.

Abstract: Provided is a method of manufacturing a polyacetal copolymer including: a step of copolymerizing 100 parts by mass of trioxane (A), 0.05 to 5 parts by mass of a cyclic acetal compound (B), and 0.001 to 1 parts by mass of an aliphatic glycidyl ether compound (C) having a chlorine content of 1 to 500 mass ppm, in the presence of a linear formal compound (D) as a molecular weight regulator, in which in the step, when a total mass (g) of the trioxane (A), the compound (B), and the compound (C) is “a”, a molar number of the linear formal compound (D) is “b”, and total molar numbers of water and methanol contained in the trioxane (A), the compound (B), and the compound (C) are respectively “c” and “d”, setting is performed to satisfy (b+c+d)/a=1.5 to 7 ?mol/g.

Abstract: A production method for a cyclic olefin copolymer which is capable of efficiently producing a cyclic olefin copolymer by copolymerizing monomers including a norbornene monomer and ethylene while suppressing the formation of a polyethylene-like impurity, and a catalyst composition for the copolymerization of a norbornene monomer and ethylene. Monomers including a norbornene monomer and ethylene are polymerized in the presence of a metal-containing catalyst, and the metal-containing catalyst has a structure in which a nitrogen atom is bonded to a transition metal of Group 4 of the periodic table and an atom of Group 15 of the periodic table.

Abstract: A polyacetal resin composition contains a polyacetal copolymer resin (A) in an amount of 100 parts by mass, the polyacetal copolymer resin having a hemiformal terminal group amount of 0.8 mmol/kg or less, a hindered phenol-based antioxidant (B) in an amount of 0.2 to 2.0 parts by mass, at least one of magnesium oxide or zinc oxide (C) in an amount of more than 2.0 parts by mass and 20 parts by mass or less, a carbon-based conductive additive (D) in an amount of 0.3 to 2.5 parts by mass, and polyalkylene glycol (E) in an amount of 0.5 to 3.0 parts by mass, wherein the carbon-based conductive additive (D) is one selected from a group consisting of only a carbon nano-structure (D1) and a combination of the carbon nano-structure (D1) and carbon black (D2) having a BET specific surface area of 300 m2/g or more.

Abstract: Provided is a thermoplastic resin composition obtained by melt-kneading at least 0.1 to 0.5 parts by mass of a carbon nanostructure relative to 100 parts by mass of a thermoplastic resin; a member formed by molding the thermoplastic resin composition; a method of manufacturing a member including steps of preparing the thermoplastic resin composition, and molding the thermoplastic resin composition into a predetermined shape; and a method of enhancing mechanical strength of a member formed from a thermoplastic resin composition by using a resin composition obtained by melt-kneading 0.1 to 0.5 parts by mass of a carbon nanostructure relative to 100 parts by mass of a thermoplastic resin.

Abstract: Provided is a method of suppressing burrs that occur during injection-molding of a polyarylene sulfide resin composition, including: adding at least 0.01 to 5 parts by mass of a carbon nanostructure to 100 parts by mass of a polyarylene sulfide resin and melt-kneading at least the carbon nanostructure and the polyarylene sulfide resin.

Abstract: A metal resin composite-molded article which can suppress deformation induced by laser processing in a technique for improving the adhesion between a metal plate and a resin by forming grooves on the surface of the metal plate by means of a laser, even if the metal plate is thin. A metal resin composite-molded article obtained by insert-molding a resin composition on a metal plate having a thickness of 500 ?m or less, grooves are formed on the surface of the metal plate in which the resin composition is inserted, the width of the grooves is 30-300 ?m, the depth of the grooves is at most 24% of the thickness of the metal plate, and the ratio of the width to the depth is 0.1-2.5.

Abstract: A method for producing a polyacetal resin composition which allows for suppression of formaldehyde generation from a molded article to an extremely low level, and stable suppression of mold deposits during molding. The polyacetal resin composition contains: 100 parts by mass of a polyacetal polymer (A); 0.01 to 0.50 parts by mass of an aliphatic carboxylic acid hydrazide (B); 0.001 to 0.50 parts by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups (C); and 0.001 to 0.30 parts by mass of an alkaline earth metal salt of aliphatic carboxylic acid (D), wherein the total amount of the components (B) and (C) with respect to 100 parts by mass of the polyacetal polymer (A) is 0.03 to 0.

Abstract: A polyacetal resin composition capable of minimizing degradation when a molded body thereof comes into contact with an acidic cleaner. The polyacetal resin composition contains with respect to (A) 100 parts by mass of a polyacetal copolymer in which the amount of a hemiformal end group is 0.8 mmol/kg or less, (B) more than 1.0 parts by mass and at most 5.0 parts by mass of a hindered phenol-based antioxidant, and (C) more than 4.0 parts by mass and at most 30 parts by mass of magnesium oxide.

Abstract: A structure capable of leaving a repetition of heating and cooling as a dynamic deformation amount. The structure retains joining performance of a laminated body made of two types of materials having different thermal properties.

Abstract: A polybutylene terephthalate resin composition is disclosed containing, with respect to 100 parts by mass of a polybutylene terephthalate resin (A) having a carboxylic acid terminal group of 35 meq/kg or less, 0.5 parts by mass or more and 10 parts by mass or less of an epoxy-based resin (B), and a quaternary ammonium salt (C); a molded article comprising the polybutylene terephthalate resin composition; a thickening inhibitor for a polybutylene terephthalate resin composition, the thickening inhibitor containing a quaternary ammonium salt; and a hydrolysis inhibitor for a molded article comprising a polybutylene terephthalate resin composition, the hydrolysis inhibitor containing a quaternary ammonium salt.

Abstract: Problem: To provide a molded article for laser welding which has excellent visible light transmittance and laser transmittance and in which variation in laser transmittance is suppressed, and an agent for suppressing variation in laser transmittance of a molded article for laser welding. Solution: A molded article for laser welding comprising a polybutylene terephthalate resin composition containing 100 parts by mass of (A) a polybutylene terephthalate resin, (B) a polycarbonate resin in which the melt viscosity at 300° C. and a shear rate of 1000 sec?1 is 0.20 kPa·s or greater, and 1 part by mass or greater and 10 parts by mass or less of (C) an epoxy-based compound, the molded article having a thickness at a welded part of 1.3 mm or greater, and an agent for suppressing variation in laser transmittance of a molded article for laser welding, the agent containing an epoxy-based compound.

Abstract: A polyacetal resin composition capable of keeping the generation of formaldehyde from a molded article at a very low level and stably keeping mold deposits at a minimum during molding. The polyacetal resin composition includes at least (A) 100 parts by mass of a polyacetal polymer, (B) 0.01-0.50 parts by mass of an aliphatic carboxylic hydrazide, (C) 0.001-0.50 part by mass of a hydantoin compound having two hydrazinocarbonylalkyl groups, and (D) 0.001-0.30 part by mass of an alkaline earth metal salt of an aliphatic carboxylic acid. The total amount of (B) and (C) is 0.03-0.55 part by mass per 100 parts by mass of the (A) polyacetal polymer.

Abstract: A casing member for an in-vehicle camera, obtained by injection molding a resin composition that comprises 100 to 300 parts by mass of a total of a fibrous inorganic filler and a non-fibrous inorganic filler to 100 parts by mass of a polyarylene sulfide resin and has a content of an elastomer of 10% by mass or less, and satisfying the following conditions (A) and (B). (A) When a molded product of a predetermined shape is injection molded using the resin composition under predetermined conditions, an absolute value of (shrinkage rate in a direction perpendicular to a flow direction)?(shrinkage rate in the flow direction) is 0.5% or less. (B) A water absorption rate of a molded product of a predetermined shape that is injection molded using the resin composition under predetermined conditions is 0.3% or less when subjected to a predetermined hot water immersion test.

Abstract: A powdery liquid-crystal resin for a press-molded article is disclosed having a bulk density of more than 0.05 g/cm3 and 0.5 g/cm3 or less. The powdery liquid-crystal resin preferably has a particle diameter distribution width as defined by JIS Z8825: 2013 of 3.0 or more and 12 or less. The powdery liquid-crystal resin preferably has an average particle diameter of 10 ?m or more and 300 ?m or less. The degree of crystallinity of the powdery liquid-crystal resin is preferably 20% or more and 70% or less.

Abstract: The present invention addresses the problem of suppressing corrosion of a molding machine or mold when molding a polybutylene terephthalate resin composition that uses a halogenated benzyl acrylate-based flame retardant as a flame retardant and suppressing corrosion of a metal terminal in an insert-molded article that uses the polybutylene terephthalate resin composition. The problem is solved by a polybutylene terephthalate resin composition that uses a halogenated benzyl acrylate-based flame retardant as a flame retardant, wherein the amount of halogenated aromatic compounds such as chlorobenzene in the manufacturing process for the flame retardant is suppressed.

Abstract: A method is disclosed for improving alkaline solution resistance of a thermoplastic resin by blending an aromatic polyvalent carboxylic acid ester into the thermoplastic resin. Preferably, 1 to 15 parts by mass of the aromatic polyvalent carboxylic acid ester are blended with respect to 100 parts by mass of the thermoplastic resin. Additionally, an aromatic polyvalent carboxylic acid ester can be used for improving alkaline solution resistance of a thermoplastic resin. An alkaline solution resistance improving agent is also disclosed for a thermoplastic resin, the alkaline solution resistance improving agent containing an aromatic polyvalent carboxylic acid ester.