Pipes and tubular conduits – Distinct layers – With intermediate insulation layer
Patent
1978-01-26
1980-07-22
Aegerter, Richard E.
Pipes and tubular conduits
Distinct layers
With intermediate insulation layer
138143, 138DIG1, 428463, F16L 914
Patent
active
042134870
ABSTRACT:
A process for producing a laminate comprising a metal sheet having thermoplastic material on both sides thereof is described. The thermoplastic material is calendered to produce an upper thermoplastic sheet and a lower thermoplastic sheet. A metal sheet is fed into the nip between the calender rolls in order to contact the metal sheet simultaneously with the upper and lower thermoplastic sheets, thus producing a laminate. Processes for producing a pipe-wrapping material, a roofing structure and a solvent-welded joint are also provided.
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Funk Smith A.
Klasen Charles J.
Vilmanis Ilmars
Aegerter Richard E.
Bryant III James E.
Grace James W.
The Celotex Corporation
Vanecek Charles W.
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