Process for the manufacture of microporous film

Details Process for the manufacture of microporous film Process for the manufacture of microporous film

1987-09-03

1989-03-28

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

51289R, 264154, 264162, 264340, 4251748E, B29C 5904, B29C 7104

Patent

active

048157147

ABSTRACT:
A vapor permeable and liquid impermeable microporous film suitable for diaper back sheets and other disposable applications is produced by first abrading a filled, unoriented film by passing it through at least one set of at least two cooperating nip rollers, each having an abrasive grit surface and then subjecting the unoriented abraded film to a corona treatment.

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patent: 4472328 (1984-09-01), Sugimoto et al.
patent: 4563316 (1986-01-01), Isaka et al.

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