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Elastic permeable material and method of making same

  • US 5,322,860 A
  • Filed: 10/22/1993
  • Issued: 06/21/1994
  • Est. Priority Date: 01/15/1993
  • Status: Expired due to Fees
First Claim
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1. A method of making an elastic permeable material comprising the steps of:

  • (a) providing a flat board-like foam material, which has closed cells and a body provided with a plurality of recesses;

    (b) filling said recesses with an emulsified rubber foam body or an emulsified polyvinyl chloride foam body;

    (c) sulfurizing said emulsified rubber foam body or said emulsified polyvinyl chloride foam body to form a permeable material having open cells; and

    (d) removing a bottom layer of said basic structure so that said recesses become through holes.

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