Patent ID: 8722774

Claim:
A method for producing a biodegradable resin composition, comprising a biodegradable resin, an organic crystal nucleating agent, and a cellulose having a crystallinity of less than 50%, wherein the organic crystal nucleating agent is contained in an amount of from 0.1 to 5 parts by weight, based on 100 parts by weight of the biodegradable resin, said method comprising the steps of: (I) subjecting a cellulose-containing raw material containing water in an amount of 20% by weight or less to a pulverization treatment, to provide a cellulose having a crystallinity of less than 50%; wherein the cellulose having a crystallinity of less than 50% is obtained by treating a cellulose-containing raw material with a pulverizer A, wherein the cellulose-containing raw material comprises a cellulose having a crystallinity of 50% or more, 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 a cellulose in an amount of 20% by weight or more of a residue component obtained by removing water from the raw material; and (II) melt-kneading the cellulose having a crystallinity of less than 50% obtained in the step (I), a biodegradable resin containing a polylactic resin, and an organic crystal nucleating agent, 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 and has an average particle size of 6 to 150 μm.