专利名称：Compostable, biodegradable foam core
board
发明人：WILLIAM C. DECKER III,WILLIAM A.
WITTOSCH JR.
申请号：AU7325094申请日：19940708公开号：AU7325094A公开日：19950206
摘要：A compostable, biodegradable foam core board has a facing sheet adhered to afoam core sheet made of a foamable biodegradable material selected from a polyvinylalcohol polymer, a starch-based thermoplastic polymer, a polylactic acid polymer, andother foamable, biodegradable polymers having structural rigidity when foamed. Thefoam core sheet has selected structural properties including a foam core weight in apreferred range of 30 to 50 lbs/msf, a foam density in a preferred range of 1.5 to 9lbs/ft3, and a foam cell size in a preferred range of 0.30 to 0.70 mm. In one example, thefoam core material is composed of a mixture of a polyvinyl alcohol polymer and high-melt-index polystyrene as a structural polymer additive. In another preferred example,the foam core material contains a blend of destructurized starch, polyethylene, polyvinylalcohol, polyvinyl acetate, and glycerol as a plasticizer.
申请人：INTERNATIONAL PAPER COMPANY
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