【発明の名称】多孔性延伸フィルム

Title:

【発明の名称】多孔性延伸フィルム

Document Type and Number:

Japanese Patent JPH03504739

Kind Code:

A

Abstract:

This invention relates to oriented porous films having cells with polygonal cross sections and average pore diameters of about 5 to about 30 microns and interconnecting pores between the cells which have a diameter of about 0.2 to about 20 microns which are formed from a polypropylene-based resin and a process for forming the film which comprises the steps of forming a film containing beta-spherulites, selectively extracting a portion of the beta-spherulites to form a porous film and stretching the porous film in at least one direction to form the oriented polymeric porous film.

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Inventors:

Jacoby, Philip (NMI)
Charles William, Bower

Application Number:

JP50548990A

Publication Date:

October 17, 1991

Filing Date:

March 14, 1990

Export Citation:

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Assignee:

Amoco Corporation

International Classes:

C08J9/00; A01G9/14; A01G13/02; B29C55/00; C08J5/18; C08J9/26; (IPC1-7): C08J9/00; C08J9/26; C08L23/10

Attorney, Agent or Firm:

Yataro Sasai (1 person outside)

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