Die with combining adaptor insert and melt-lamination process
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United States of America Patent
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Oct 28, 1986
Grant Date -
N/A
app pub date -
May 21, 1984
filing date -
May 21, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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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