Patent ID: 9475913
Filing Date: 2016-10-25
CPC Classification: C08J

Claim Text:
1. A foam sheet comprising: at least one resin layer formed of a biodegradable resin composition comprising chain-extended polylactic acid, a plasticizer, a foaming agent, a chain extension catalyst, a foaming aid, and inorganic fillers, wherein the chain-extended polylactic acid is obtained from 100% amorphous polylactic acid, wherein the chain-extended polylactic acid is extended by a chain extender and the chain extension catalyst, wherein the chain extender is ethylene-acrylic ester-glycidyl methacrylate, wherein the chain extension catalyst is presented in an amount of 0.5 parts by weight to 1.0 parts by weight based on 100 parts by weight of the chain-extended polylactic acid, wherein the plasticizer is presented in an amount of 40 parts by weight to 100 parts by weight based on 100 parts by weight of the chain-extended polylactic acid, wherein the foaming aid comprises at least one selected from the group consisting of zinc neodecanoate, potassium neodecanoate, and zinc 2-ethylhexanoate, and wherein the inorganic fillers are presented in an amount of 100 parts by weight to 300 parts by weight based on 100 parts by weight of the chain-extended polylactic acid resin.