Die with combining adaptor insert and melt-lamination process

Details Die with combining adaptor insert and melt-lamination process Die with combining adaptor insert and melt-lamination process

B - Operations, Transporting

29

C

18/746

B29C 47/06 (2006.01) B29C 47/04 (2006.01)

Patent

CA 1240112

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.

481438

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