Method of welding tubular products of polyarylene sulfide and we

Details Method of welding tubular products of polyarylene sulfide and we Method of welding tubular products of polyarylene sulfide and we

1992-12-09

1994-07-12

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563046, 1563082, 1563099, 156322, 2642098, B32B 3120

Patent

active

053285417

ABSTRACT:
A pair of tubular products of polyarylene sulfide having end faces to be welded are welded to each other by heating the end faces by a hot plate in no contact with the end faces to a surface temperature which is at least the melting heat-absorption peak temperature and at most 80.degree. C. above the melting initiation temperature of the polyarylene sulfide, and abutting the end faces under a pressure of 50-1500 kPa when the end faces are at a surface temperature which is at least 10.degree. C. above the melting initiation temperature and not exceeding the melting heat-absorption peak temperature of the polyarylene sulfide. As a result, a welded tubular structure having a weld with a small inside bead but having a sufficiently large weld strength can be obtained with substantially no thermal degradation and at a good operating efficiency.

REFERENCES:
patent: Re32595 (1988-02-01), Davies
patent: 3013925 (1961-12-01), Larsen
patent: 4405740 (1983-09-01), Davies
patent: 4421588 (1983-12-01), Davies
patent: 4764235 (1988-08-01), Hazama et al.
patent: 4929293 (1990-05-01), Osgar

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