Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1976-08-04
1978-07-11
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264177R, 264209, 264237, 264327, 264348, 4251311, B29F 308
Patent
active
041002431
ABSTRACT:
A process for sizing an extruded thermoplastic structure or member formed by coextrusion of a core profile of one thermoplastic material and a cover layer of another thermoplastic material provided over a portion of the periphery of the core profile which includes the steps of sizing the extruded plastic structure in the external cross sectional dimensions, cooling during the sizing step the structure and effecting a different temperature control of the cooling of the cross section of the profile depending upon the thermoplastic material being cooled. The thermoplastic material having the higher Vicat softening temperature being more gradually cooled than the one having a lower Vicat softening temperature.
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patent: 3899561 (1975-08-01), Heilmayr
patent: 3927160 (1975-12-01), Medley
Gauchel Peter
Wissinger Waldemar
Dynamit Nobel Aktiengesellschaft
Thurlow Jeffery R.
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