Process of making highly adhesive plastic top coatings on metall

Details Process of making highly adhesive plastic top coatings on metall Process of making highly adhesive plastic top coatings on metall

1978-12-15

1981-05-19

Goolkasian, John T.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 82, 156165, 156143, 156155, B32B 8100, B29C 2500, B29C 1900, B31C 3900

Patent

active

042683335

ABSTRACT:
A process and apparatus for making highly adhesive plastic top coatings, more particularly of polyurethane or thermoplastic polyester, on metallic substrates, particularly of braided or plaited wire layers, as pressure substrate, having an inner core of plastic, particularly a polymer of thermoplastic plastic, surrounded by the substrate, the plastic top coating being extruded in an extruder head onto the substrate, characterized in that the substrate having openings is prestressed then heated to approximately the temperature of the extrudate or the extruder head, so that there is generated in the inner core a radially directed prestress which forces at least part of the material thereof, while softening, through the openings in the substrate, and that thereafter a vacuum is created around the substrate or between the head and the flexible tube and that simultaneously with, or immediately after, the creation of the vacuum the top coating fusing intimately and/or bonding together with the material of the inner core that passes through the openings in the substrate.

REFERENCES:
patent: 3843435 (1974-10-01), Strom

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