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Porous hollow fiber

  • US 4,992,332 A
  • Filed: 04/27/1989
  • Issued: 02/12/1991
  • Est. Priority Date: 02/04/1986
  • Status: Expired due to Fees
First Claim
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1. In a porous hollow polypropylene fiber having a large number of micropores in its surrounding wall, the improvment in which walls of said pores are coated with an essentially water-insoluble polymer selected from the group consisting of, carboxymethylethylcellulose, hydroxypropylmethylcellulose acetate succinate and hydropropylmethylcellulose phthalate and.

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