Biaxially oriented microporous membrane

Biaxially oriented microporous membrane

  • CN 101,384,409 A
  • Filed: 02/14/2007
  • Published: 03/11/2009
  • Est. Priority Date: 02/21/2006
  • Status: Active Application
First Claim
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1. , a kind of method of making microporous barrier comprises the steps:

  • With extruded polymer become nonporous precursor andThis nonporous precursor of biaxial stretching, this biaxial stretching comprise the stretching and the cross directional stretch of machine direction, and this laterally comprises the retraction of controlled machine direction simultaneously.

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