D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 13/12 (2006.01) D21H 13/14 (2006.01) D21H 13/16 (2006.01) D21H 17/00 (2006.01) D21H 25/04 (2006.01)
Patent
CA 2051773
TITLE HIGH GRADE POLYETHYLENE PAPER ABSTRACT OF THE DISCLOSURE A process is disclosed for producing high grade synthetic paper containing at least 97 wt.% polyethylene on conventional continuous wet-lay paper-making equipment. In particular, the process comprises preparing a pulp furnish of 97-99.5 wt.% oriented polyethylene fibers and 0.5-3.0 wt.% polyvinyl alcohol fibers and depositing the fibers on the forming screen of a conventional wet-lay paper machine. The resulting waterleaf sheet is then dried on heated PTFE- coated drying cans, using a particular drying profile to reduce sticking and elongation, and then thermally bonded to provide a polyethylene paper having high strength, low defects and excellent uniformity. A process for producing the pulp fibers used in the paper-making process is also disclosed. TK 2870
Bennett Jones Llp
E. I. Du Pont de Nemours And Company
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