Synthetic roofing elements of the slate type and a method of man

Details Synthetic roofing elements of the slate type and a method of man Synthetic roofing elements of the slate type and a method of man

1979-10-04

1981-12-29

Bell, J. Karl

Static structures (e.g., buildings)

With synthetic resinous component

With nonresinous component

52555, 52631, 52DIG9, 52741, 428147, 428172, 428286, E04D 120

Patent

active

043075525

ABSTRACT:
For obtaining a roofing element of the slate type, a synthetic material such as polyethylene, polypropylene or polyvinylchloride is mixed with a charge, such as chalk, kaolin, dolomite, talc, and with carbon black. The proportion by weight of synthetic material is between 30 and 60%, whereas that of the charge is between 20 and 60% and that of the carbon black is between 0.5 and 5%. The mixture is extruded and then calendered.

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patent: 4024684 (1977-05-01), Holmgren
patent: 4045603 (1977-08-01), Smith
patent: 4151687 (1979-05-01), Kephart

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