Method of making a composite of paper and plastic film

Details Method of making a composite of paper and plastic film Method of making a composite of paper and plastic film

1995-06-07

1998-06-30

Crispino, Richard

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156210, 15624416, 15624419, 15624422, 15624423, 15624427, 1562726, B32B 3112, B32B 3118, B32B 3120, B32B 3130

Patent

active

057728194

ABSTRACT:
Composites of paper and bioriented plastic film are made by passing a web of paperboard and a web of plastic film, with a layer of extruded molten polymer impregnating and bonding agent between the webs, through a nip. The process involves controlling one or more of the speed of the webs, the temperature of the molten polymer, the pressure or spacing of the rolls at the nip, and the rate of extrusion, relative to the porosity and surface characteristics of the paper web such that a portion of the molten polymer impregnates partially into and becomes part of the paper web and a substantial portion lies outwardly of the surface of the paper web and solidifies to form a new surface to which the film is bonded and which it is supported clear of the paper surface.

REFERENCES:
patent: 3640788 (1972-02-01), Flynn
patent: 3862869 (1975-01-01), Peterson et al.
patent: 4254173 (1981-03-01), Peer, Jr.
patent: 4544597 (1985-10-01), Peer, Jr. et al.
patent: 4765855 (1988-08-01), Geoffroy-Dechaume et al.

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