Water soluble/dispersible multilayered film of high interlayer a

Details Water soluble/dispersible multilayered film of high interlayer a Water soluble/dispersible multilayered film of high interlayer a

1994-12-27

1997-10-07

Kiliman, Leszek

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

428 357, 428216, 428500, 428518, 428913, B29D 2200, B32B 702, B32B 2700

Patent

active

056745788

ABSTRACT:
A film having at least two layers is disclosed, one layer being composed essentially of a water soluble/dispersible blend of polyethylene oxide (PEO) and plasticized polyvinyl chloride (PVC) and a second relatively weak layer being composed of a water insoluble polymer having high resistance to liquid and gas transmission, particularly a polymer or copolymer of vinylidene chloride (PVDC). Also disclosed is a collection pouch formed of such film. In the fabrication of such a pouch, the film panels are arranged with their PVDC layers in facing relation and the edges of such panels are then heat sealed to each other, resulting in a pouch of relatively high strength and resistance to delamination in use but capable of dissolving/dispersing quickly when discarded into the water of a flush toilet.

REFERENCES:
patent: 3790067 (1974-02-01), Scheier
patent: 4372311 (1983-02-01), Potts
patent: 4503098 (1985-03-01), Potts
patent: 4772279 (1988-09-01), Brooks et al.
patent: 4917689 (1990-04-01), Coombes
patent: 5110390 (1992-05-01), Martini
patent: 5391423 (1995-02-01), Wnuk et al.
patent: 5468526 (1995-11-01), Allen et al.
POLYOX Technical Literature, Union Carbide Corporation, 10 pages (1993).

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