Process for coating webs with polyethylene

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

B - Operations, Transporting

32

B

117/114.6

B32B 27/10 (2006.01) B32B 27/12 (2006.01)

Patent

CA 1211321

ABSTRACT OF THE DISCLOSURE The present invention provides a process for coating a substrate web e.g. paper, nylon film, polyethylene film, with polyethylene in which process a polyethylene having a melt index of between about 30 and about 100 dg/min, is extruded, through a slotted die, in the form of a sheet having two edges onto the substrate web which is being transported past the slotted die, to form a coated web. Subsequently the coated web is passed through a nip roll assembly comprising a chill roll and another roll which form a throat therebetween. The slotted die has edge guides at the extremities thereof which are kept at a temperature higher than the melting temperature of the polyethylene. The edge guides are adapted to direct the edges of the extruded sheet into the throat of the nip roll assembly.

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