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Process for preparing biodegradable resin foam

  • US 5,308,879 A
  • Filed: 08/13/1993
  • Issued: 05/03/1994
  • Est. Priority Date: 09/07/1992
  • Status: Expired due to Term
First Claim
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1. A process for producing a biodegradable resin foam, comprising the steps of mixing a starch polymer containing from 5% by weight to 30% by weight of water, a vinyl alcohol resin containing from 5% by weight to 30% by weight of water, a nonionic surfactant and an inorganic or organic filler;

  • optionally adjusting the water content of the mixture, to prepare a composition having from 5% by weight to 30% by weight of water on the whole, based on the total weight of the composition;

    melting and expanding it to prepare a foam.

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