Method of coextruding plastics to form a composite sheet

Patent · 04 June 1985

OSTI ID:865469

Tsien, Hsue C ^[1]

---

1. Chatham Township, Morris County, NJ

This invention pertains to a method of producing a composite sheet of plastic materials by means of coextrusion. Two plastic materials are matched with respect to their melt indices. These matched plastic materials are then coextruded in a side-by-side orientation while hot and soft to form a composite sheet having a substantially uniform demarkation therebetween. The plastic materials are fed at a substantially equal extrusion velocity and generally have substantially equal viscosities. The coextruded plastics can be worked after coextrusion while they are still hot and soft.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Assignee: Exxon Research & Engineering Co. (Florham Park, NJ)
• Patent Number(s): US 4521359
• Application Number: 06/327,274
• OSTI ID: 865469
• Country of Publication: United States
• Language: English

Related Subjects

/264/156/425/
coextruded
coextruding
coextrusion
composite
composite sheet
demarkation
equal
extrusion
fed
form
hot
indices
matched
materials
means
melt
method
orientation
pertains
plastic
plastic material
plastic materials
plastics
producing
respect
sheet
side-by-side
soft
substantially
substantially equal
substantially uniform
therebetween
uniform
velocity
viscosities