Thermally insulated tubing

Details Thermally insulated tubing Thermally insulated tubing

1979-09-27

1981-12-29

Bryant, III, James E.

Pipes and tubular conduits

Distinct layers

With intermediate insulation layer

138132, 138139, 138143, 138145, 138DIG9, 138156, 428921, 174121A, F16L 914

Patent

active

043077560

ABSTRACT:
A spacer is coiled about a drawn, seamless copper tube, and a metal foil or metallized paper ribbon is folded around the coiled spacer. A blend for foaming is injected into the unoccupied space between the folded foil or ribbon and the inner tube, to generate a cyanurate-modified polyurethane foam network in which phosphorous or halogen molecules are embedded by chemical bond. A flame-resistant ribbon is folded about the metal tube. The resulting product and further details of the process are described.

REFERENCES:
patent: 497535 (1893-05-01), Cummings
patent: 3434502 (1969-03-01), Snelling
patent: 3473575 (1969-10-01), Vogelsang et al.
patent: 3529632 (1970-09-01), Johns
patent: 3552445 (1971-01-01), Andrews
patent: 3778408 (1973-12-01), Burns et al.
patent: 3821067 (1974-06-01), Taylor et al.
patent: 4213487 (1980-07-01), Funk et al.

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