Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1984-05-21
1986-10-28
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
4251311, 4251335, 425376A, 425462, 425467, B28B 320, B29C 4700
Patent
active
046198024
ABSTRACT:
An extrusion apparatus including a die and a combining adaptor is provided. The combining adaptor is inserted in a cavity in the die. The extrusion apparatus includes flow channels, which converge in the proximity of a locus at which a layered melt stream formed by the convergence, is caused to diverge and flow transversely. The locus of divergence is within a manifold. As a result, the apparatus makes a laminate having layers of substantially uniform thickness without profiling of the layered melt stream. Also provided is a process for making the laminate without profiling. The invention lessens the curtaining effect in the layers of the laminate formed.
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"On the Interface Deformation in the Stratified Two-Phase Flow of Viscoelastic Fluids", Khan and Han, Dept of ChE, Polytech Institute of New York, 1976, The Society of Rheology, Inc. pp. 595-621.
Heitbrink Timothy W.
Kroboth Timothy R.
Woo Jay H.
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