Patent ID: 8716373

Claim:
A method for producing a biodegradable resin composition comprising the steps of: (I) subjecting a cellulose-containing raw material to a pulverization treatment to provide a cellulose having a crystallinity of X (%) and an average particle size of 6.5-150 μm, wherein the cellulose-containing raw material comprises a cellulose having a crystallinity of Y (%), and has a bulk density of from 100 to 500 kg/m 3 , and an average particle size of from 0.01 to 1.0 mm, and contains water in an amount of 20% by weight or less, and contains a cellulose in an amount of 20% by weight or more of a residue component obtained by removing water from the raw material, wherein X and Y satisfy the following formulas: 50 ≦X≦Y− 10 (1) 60 ≦Y≦ 99 (2); and (II) melt-kneading the cellulose having a crystallinity of X(%) obtained in the step (I) and a biodegradable resin containing a polylactic acid resin, wherein the cellulose is contained in an amount of from 5 to 300 parts by weight based on 100 parts by weight of the biodegradable resin.