Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1981-07-06
1984-01-17
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
264177R, 2642101, 4251311, 4251335, 425462, B29F 304
Patent
active
044263449
ABSTRACT:
Disclosed is a process for producing a multiple-layered sheet of film comprising at least two thermoplastic materials by coextrusion through a slot die, comprising the steps of heat plastifying a first, second, third and fourth thermoplastic material; joining a stream of the first heat plastified thermoplastic material and a stream of the second heat plastified thermoplastic material to form a first combined stream having a generally rectangular cross-section and having an upper layer of the first thermoplastic material and a lower layer of the second thermoplastic material mechnically anchored together by means of profiles formed on the contact surfaces of the two layers; joining a stream of the third heat plastified thermoplastic material and a stream of the fourth heat plastified thermoplastic material to form a similar second combined stream, reducing the width of the first and second combined stream; joining the first and second combined streams in edge-to-edge fashion in a single plane to form a composite stream; introducing the composite stream into the inlet channel of the slot die; coextruding the composite stream through the slot die to form a multiple layer film or sheet; and cooling the film or sheet. Also disclosed is an apparatus for carrying out this process.
REFERENCES:
patent: 1356891 (1920-10-01), Steinle
patent: 3321804 (1967-05-01), Breidt, Jr. et al.
patent: 3443277 (1969-05-01), Frielingsdorf
patent: 3444031 (1969-05-01), Schrenk
patent: 3485912 (1969-12-01), Schrenk et al.
patent: 3487505 (1970-01-01), Chisholm et al.
patent: 3524795 (1970-08-01), Peterson
patent: 3694119 (1972-09-01), Scheibling
patent: 3759647 (1973-09-01), Schrenk
patent: 3847585 (1974-11-01), Chisholm
patent: 3884606 (1975-05-01), Schrenk
Kunststoffe, vol. 69, No. 2 (1979), pp. 81 and 82.
Dinter Peter
Kolbe Andreas
Hoechst Aktiengesellschaft
Thurlow Jeffery R.
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