Multi-layer molten plastic body

Details Multi-layer molten plastic body Multi-layer molten plastic body

1989-11-03

1991-05-28

Seidleck, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

4285428, B65D 102

Patent

active

050194330

ABSTRACT:
A modular extrusion head is disclosed including a plurality of cross head die modules, each including a flow path for a single resin. Molten resin layers are flowed from the modules onto a stepped mandrel and then along the mandrel and out an extrusion die to form a multi-layer parison. The layers are thin, with a uniform thickness and hole free. The modules are temperature zoned to permit flowing of a low temperature resin to and along the mandrel in contact with a high temperature resin without impairing the properties of the low temperature resin.

REFERENCES:
patent: 3308508 (1967-03-01), Schrenk
patent: 3635624 (1972-01-01), Nakakoshi et al.
patent: 3949042 (1976-04-01), Utz
patent: 4044086 (1977-08-01), McChesney et al.
patent: 4436778 (1984-03-01), Dugal
patent: 4484883 (1984-11-01), Honda et al.
patent: 4522775 (1985-06-01), Briggs et al.
patent: 4578025 (1986-03-01), Ando et al.

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