Process for coating webs with polyethylene

Details Process for coating webs with polyethylene Process for coating webs with polyethylene

1982-03-10

1983-10-04

Lusignan, Michael R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

427358, 427361, 427365, 4273982, B29C 1900, B05D 312

Patent

active

044076908

ABSTRACT:
A process is provided for coating of substrate webs with polyethylene wherein the edge thickening and other processing difficulties caused by the necking-in phenomenon are minimized. The process comprises extruding a polyethylene having a melt index between 30 dg/min and 100 dg/min through a slot in a slotted die in the form of a sheet onto the moving substrate web to form the coated web, and passing the coated web through a nip roll assembly comprising a chill roll and a nip roll, the slotted die having at the extremities of the slot therein edge guides which are maintained at a temperature above the melting temperature of the polyethylene and are contoured to guide the adhered edges of the extruded sheet into the throat of the nip roll assembly.

REFERENCES:
patent: 2894853 (1959-07-01), Andersson
patent: 3456293 (1969-07-01), De Smedt et al.
patent: 4133710 (1979-01-01), Wartenberg

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