Thermoformable composite sheet
AssigneeE. I. Du Pont de Nemours and Company
InventorDimitri P. Zafiroglu
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Abstract
An improved thermoformable composite sheet comprises a layer of thermoplastic polymer and a lightweight stitchbonded nonwoven elastic fabric having a conformability at 180.degree. C. in the range of 4 to 9. The sheet provides articles thermoformed therefrom with improved wall thickness uniformity.
Claims7
In a thermoformable composite sheet having a thermoplastic polymer layer which is adhered to a relatively lightweight fabric layer, the improvement comprising the fabric layer being a stitchbonded nonwoven elastic fabric having a conformability at 180.degree. C. in the range of 4 to 9 and amounting to no more than 20% of the total composite sheet weight.
Dependencies are inferred from the claim text.