Flexible multilayer structures comprising a layer of vinylidene chloride copolymer bonded to a layer of plasticized vinyl chloride polymer and their use for the manufacture of packaging
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United States of America Patent
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-
Dec 22, 1992
Grant Date -
N/A
app pub date -
Jul 16, 1991
filing date -
Jul 27, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The flexible multilayer structures comprise a layer of vinylidene chloride copolymer bonded to a layer of plasticized vinyl chloride polymer with the aid of a polymeric adhesive consisting of a mixture of vinyl acetate polymer and of polymethyl methacrylate, for which the product of the vinyl acetate weight content, expressed in per cent, multiplied by the dynamic viscosity at 100.degree. C. and 1 s.sup.-1, expressed in kPa s, is greater than 1.3.times.10.sup.3. The flexible multilayer structures may be in the form of films, sheets, cartons or flexible pouches which can be employed in the packaging field.
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