Flexible tube of thermoplastic resin having poor melt flowabilit

Details Flexible tube of thermoplastic resin having poor melt flowabilit Flexible tube of thermoplastic resin having poor melt flowabilit

1989-01-13

1990-07-03

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

26421121, 264310, 425206, 425381, 425467, B29C 4724

Patent

active

049389084

ABSTRACT:
Disclosed is a method and apparatus for producing a flexible tube of a thermoplastic resin having poor melt flowability by melting a thermoplastic resin having poor melt flowability in a screw extruder, and melt-extruding the molten thermoplastic resin from a tube die having an L/D of 30-70 provided at a mandrel rotatable with the rotation of the screw.

REFERENCES:
patent: 3276075 (1966-10-01), Harwood
patent: 3387331 (1968-06-01), Billings
patent: 3400428 (1968-09-01), Barainsky
patent: 3887319 (1975-06-01), Cottingham
patent: 3890416 (1975-06-01), Bauer et al.
patent: 4021170 (1977-05-01), Anderson et al.
patent: 4225547 (1980-09-01), Okita
patent: 4494877 (1985-01-01), Upmeier et al.
patent: 4518552 (1985-05-01), Matsuo et al.

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