Thermoplastic resin composition, cellulose-reinforced thermoplastic resin composition, method of producing cellulose-reinforced thermoplastic resin composition, molded article of cellulose-reinforced resin, and method of producing molded article of cellulose-reinforced resin

A cellulose-reinforced thermoplastic resin composition, comprising an ester-linked composite resin in which a hydroxyl group of a cellulose and a polyethylene resin provided with a cross-linking structure having a carboxylic group are esterified,

• wherein the content of the cellulose component in the composite resin is from 9.1 to 41% by mass,
• the tensile strength of a resin composed of the cellulose-reinforced thermoplastic resin composition measured in conformity with JIS K7161 is 40 MPa or more,
• an organic peroxide is used in the composition as a radical polymerization initiator,
• the content of the organic peroxide is 0.006 to 0.009 part by mass with respect to 100 parts by mass of the total content of the polyethylene resin and the cellulose, and
• the cellulose is plant fiber-derived kraft pulp.

A molded article of a cellulose-reinforced resin, comprising an ester-linked composite resin in which a hydroxyl group of a cellulose and a polyethylene resin provided with a cross-linking structure having a carboxylic group are esterified,

• wherein the content of the cellulose component in the composite resin is from 9.1 to 41% by mass,
• the tensile strength of the molded article of a cellulose-reinforced resin measured in conformity with JIS K7161 is 40 MPa or more,
• an organic peroxide is used as a radical polymerization initiator, and the content of the organic peroxide is 0.006 to 0.009 part by mass with respect to 100 parts by mass of the total content of the polyethylene resin and the cellulose, and
• the cellulose is plant fiber-derived kraft pulp.