Ultra-high molecular weight polyethylene thin-wall pipe, and met

Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion

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Details

264565, 2642095, 2642098, 26421121, 264312, 26433117, 425325, 425381, 425466, B29C 4724

Patent

active

052904989

ABSTRACT:
A method of manufacture of an ultra-high molecular weight polyethylene thin-wall pipe which is uniform in thickness and free from a folded mark. The ultra-high molecular weight polyethylene thin-wall pipe is manufactured by supplying ultra-high molecular weight polyethylene into and melting and kneading, continuously extruding the molten substance of the ultra-high molecular weight polyethylene from a die connected to a screw of the screw extruder to form a cylindrical roughly shaped article, and diametrically expanding the cylindrical roughly extruded article by means of a tapered core and taking up.

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patent: 4987025 (1991-08-01), Shiraki
patent: 5063016 (1991-11-01), Bauer et al.

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