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

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

1998-06-26

2000-02-29

Yao, Sam Chaun

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

15624416, 15624418, 15624423, 15624427, 156250, 1562726, 156210, 156324, B32B 3112, B32B 3120, B32B 3130

Patent

active

060304774

ABSTRACT:
Composites of paper and bioriented polyester 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. The molten polymer may be polyethylene or an ethylene acrylic acid copolymer. These composites are useful in forming corrugated structures which may be used for baking in convection ovens.

REFERENCES:
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: 4865912 (1989-09-01), Mitsumata
patent: 5772819 (1998-06-01), Olvey
patent: 5888714 (1999-03-01), Bourdelais et al.

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