Process for making elastomeric hose

Details Process for making elastomeric hose Process for making elastomeric hose

1979-04-25

1981-02-10

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

138124, 138126, 138137, 138153, 138DIG9, 156149, 15624413, B32B 3130, B32B 3300, F16L 1104, F16L 1108

Patent

active

042499712

ABSTRACT:
Elastomeric hose having relatively low thermal conductivity is provided comprising an outer tubular cover vulcanized to an inner tube, the outer cover being radially expanded and having a cellular or porous network formed therein. A braided or knitted reinforcing layer may be provided between the radially expanded cellular cover and the inner tube with the former being bonded or vulcanized to the latter through the interstices of the reinforcing layer. The elastomeric hose may be formed by a process wherein a first forming composition, including a thermosetable elastomer, is extruded to form an uncured inner tube which is then simultaneously introduced into a cross-head extruder with a second, separately prepared, forming composition including a thermosetable elastomer and a blowing agent. The second forming composition is extruded about the uncured inner tube to form the uncured hose structure of the present invention which is then vulcanized in a fluidized bed cure system at atmospheric pressure and at a temperature above about 350.degree. F.

REFERENCES:
patent: 3547162 (1970-12-01), Schaerer
patent: 3586558 (1971-06-01), Galloway et al.
patent: 3824141 (1974-07-01), Miller et al.
patent: 3881521 (1975-05-01), Johansen et al.

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