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AssigneeHoechst Celanese Corporation
InventorsRandy D. Jester, Arnold E. Wolf, Robert M. Kimmel, Dominick Cangiano, John A. Penoyer
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Multilayer laminates including films, sheets, preforms, containers and other articles having at least one wholly aromatic, amorphous, stretchable liquid crystalline polymer layer with at least one non-liquid crystalline thermoplastic polyester layer are provided as well as methods for producing and stretching the multilayer articles. The laminates are suitable for thermoforming and stretch blow molding applications and may be stretched to at least 100 percent elongation at temperatures below 200° C. and at high total draw ratios without fractures or tears. Containers suitable for food or beverage products may be produced from the laminates.
A multilayer laminate comprising (a) at least one layer of wholly aromatic liquid crystalline polymer which is stretchable at a temperature below 200° C., and (b) at least one layer of non-liquid crystalline polyester, wherein said multilayer laminate was stretched to at least 100 percent elongation while at a temperature below 200° C. and below the temperature of the molten state of said layer (a) of wholly aromatic liquid crystalline polymer so as to achieve molecular orientation in layer (b).
A method for forming a multilayer laminate comprising joining (a) at least one layer of a wholly aromatic liquid crystalline polymer which is stretchable at a temperature below 200° C., and (b) at least one layer of a non-liquid crystalline polyester to form a multilayer laminate, and stretching said multilayer laminate to at least 100 percent elongation while at a temperature below 200° C. and below the temperature of the molten state of layer (a) so as to achieve molecular orientation in layer (b).
Dependencies are inferred from the claim text.