Abrasion process for the manufacture of microporous film

Details Abrasion process for the manufacture of microporous film Abrasion process for the manufacture of microporous film

1987-09-03

1989-05-23

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264162, 264DIG47, 264DIG70, B29C 5904, B29C 6720

Patent

active

048328863

ABSTRACT:
A vapor permeable and liquid impermeable microporous film suitable for diaper back sheets and other disposable applications is produced by 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.

REFERENCES:
patent: 3302501 (1967-02-01), Greene
patent: 3718059 (1973-02-01), Clayton
patent: 4250135 (1981-02-01), Arsina
patent: 4364985 (1982-12-01), Tokuyama

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