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Method of forming a membrane, especially a latex or polymer membrane, including a deactivating barrier and indicating layer

  • US 5,549,924 A
  • Filed: 08/15/1994
  • Issued: 08/27/1996
  • Est. Priority Date: 07/17/1987
  • Status: Expired due to Term
First Claim
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1. A method of making a multi-layer membrane including at least two discrete separated layers, comprising the steps of:

  • (a) depositing onto a former a first latex layer;

    (b) treating said first layer with a material effective as a coagulant for latex;

    (c) depositing over said first layer on said former a second latex layer, said coagulant effective to substantially prevent fusing of said first and second layers; and

    (d) setting or curing said first and second layers.

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