Resin composition and molded resin object
A resin composition includes: a cellulose acetate propionate and cellulose fibers in which a part or all of primary hydroxyl groups of glucose moieties are oxidized into a carboxylic acid, the cellulose fibers having an average fiber diameter of 1 to 8 nm.
1. A resin composition comprising:
A cellulose acetate propionate, wherein a content of a propionyl group in the cellulose acetate propionate is 39 to 51% by mass based on the cellulose acetate propionate, and
cellulose fibers in which a part or all of primary hydroxyl groups of glucose moieties are oxidized into a carboxylic acid, the cellulose fibers having an average fiber diameter of 1 to 8 nm.
2. The resin composition according to claim 1 , wherein the cellulose acetate propionate has a degree of polymerization of 50 to 900.
3. The resin composition according to claim 1 , wherein the cellulose fibers are cellulose fibers oxidized using 2,2,6,6-tetramethylpipenidyl-1-oxy radical as a catalyst.
4. The resin composition according to claim 1 , wherein a mass ratio (A)/(B) of a mass (A) of the cellulose acetate propionate to mass (B) of the cellulose fibers is from 10 to 1,000.
5. The resin composition according to claim 1 further comprising a plasticizer.
6. The resin composition according to claim 5 , wherein a mass ratio (A)/(C) of a mass (A) of the cellulose acetate propionate to mass (C) of the plasticizer is from 6 to 20.
7. The resin composition according to claim 5 , wherein the plasticizer is any one compound selected from the group consisting of a compound containing an adipic acid ester, a polyester polyol, and a polyetherester compound.
8. A molded resin object obtained by molding the resin composition according to claim 1 .
9. The molded resin object according to claim 8 that is an injection-molded object.