B - Operations – Transporting – 31 – F
Patent
B - Operations, Transporting
31
F
154/100, 154/118
B31F 1/20 (2006.01) B32B 3/28 (2006.01) B32B 27/10 (2006.01)
Patent
CA 2005073
Composites of paper and bioriented plastic film, preferably polyester, are made by passing into and through the nip of a pair of nip rolls a web of paperboard and a web of plastic film, with a layer of molten polymer impregnating and bonding agent extruded into the nip between the webs on the entry side of the nip. The process involves relatively 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 substantial 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 an which it is supported clear of the paper surface. The product as collected from the nip rolls is a composite comprising paper partially impregnated with solidified polymer, a contiguous layer of solidified polymer having the new surface outwardly of the paper surface, and the plastic film bonded to the new surface. The film may be reverse printed with high quality graphics which are retained in the composite. Various treatments of the film and the paper enhance the characteristics of the composite. The composite is highly resistant to separation or checking when scored and formed into container blanks, and can be combined with a single faced corrugated board in the "double-backer" part of a conventional corrugating machine as the double face liner without adversely affecting the film, its graphics, or the impregnating and bonding polymer. Principal uses are in packaging, point-of-purchase displays, wall panels, and the like.
Laminating Technologies Industries Llc
Olvey Michael Wayne
Seaby & Associates
LandOfFree
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