Method and apparatus providing uniform resin distribution in a c

Details Method and apparatus providing uniform resin distribution in a c Method and apparatus providing uniform resin distribution in a c

1980-10-30

1982-08-17

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

264514, 4251331, 425376A, 425462, B29F 306

Patent

active

043449077

ABSTRACT:
Disclosed is a method and apparatus for ensuring uniform distribution of higher and lower viscosity or flow rate resins in a product produced by a coextrusion process. A flow restriction is provided in the flow path of the lower viscosity or flow rate resin to increase the pressure drop of this resin as it passes through a coextrusion die. The increased pressure drop introduced by the flow restriction causes the lower viscosity or flow rate resin to be more uniformly distributed in the extruded product. A specific die construction providing a uniform resin flow channel within the die is also described.

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patent: 4061461 (1977-12-01), Hessenthaler
patent: 4152387 (1979-05-01), Cloeren

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