Method of coextruding plastics to form a composite sheet

Title: Method of coextruding plastics to form a composite sheet

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Abstract

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.

Inventors:

Tsien, Hsue C ^[1]

Chatham Township, Morris County, NJ

Issue Date:: 1985-06-04

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

OSTI Identifier:: 865469

Patent Number(s):: 4521359

Application Number:: 06/327,274

Assignee:: Exxon Research & Engineering Co. (Florham Park, NJ)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29L - INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

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B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
B29K2023/12 - {PP, i.e. polypropylene}
B29K2023/06 - {PE, i.e. polyethylene}

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29L - INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
B29L2031/3468 - {Batteries, accumulators or fuel cells

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29C - SHAPING OR JOINING OF PLASTICS
B29C48/12 - Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
B29C59/00 - Surface shaping {of articles}, e.g. embossing
B29C71/00 - After-treatment of articles without altering their shape
B29C48/19 - the layers being joined at their edges
B29C48/08 - flexible, e.g. films

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DOE Contract Number:: 49-2862

Resource Type:: Patent

Country of Publication:: United States

Language:: English

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

Citation Formats


                    Tsien, Hsue C. Method of coextruding plastics to form a composite sheet.  United States: N. p., 1985. 
        Web.

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                    Tsien, Hsue C. Method of coextruding plastics to form a composite sheet.  United States.

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                    Tsien, Hsue C. Tue .  
        "Method of coextruding plastics to form a composite sheet".  United States.  https://www.osti.gov/servlets/purl/865469.

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@article{osti_865469,

  title        = {Method of coextruding plastics to form a composite sheet},

  author       = {Tsien, Hsue C},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1985},

  month        = {6}

}

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