Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1996-07-12
1998-12-15
Campbell, Eggerton A.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
428461, B29D 2200, B32B 1508
Patent
active
058493824
ABSTRACT:
Tubing for a brake system, fuel system or hydraulic system in automotive vehicles which includes an inside steel tube having an outer surface, a zinc coating layer on the outer surface, chromated layer overlying the zinc coating layer and a plastic jacket layer overlying the chromated layer wherein the plastic jacket layer is composed of a polyamide on the chromated layer, the polyamide preferably being laurinlactam and the chromated layer preferably being olive-colored. The method of tubing manufacture including the steps of heating a steel tube having an outer surface with the zinc coating and chromate present thereon to an elevated temperature; the elevated temperature being within about .+-.30.degree. C. of the extrusion temperature of polyamide material to be applied to the tube; extruding polyamide material onto the surface of the heated tube; and quenching the tube in a liquid bath after the polyamide has been applied.
REFERENCES:
patent: 3503823 (1970-03-01), Richart et al.
patent: 5026451 (1991-06-01), Trzelieski et al.
Campbell Eggerton A.
ITT Automotive Europe GmbH
Lewis J. Gordon
Twomey Thomas N.
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