| 摘要 |
<p>A coextruded thermoplastic sheet suitable for thermoforming into a rigid container, the sheet including a bulk layer made of a first material and a pair of bending moment resisting layers adhered to opposite surfaces of the bulk layer, the moment resisting layers being made of a second material that is more rigid than the first material, whereby the bulk layer acts to locate the second material of more rigidity at a location spaced from the neutral axis of the sheet where it efficiently resists bending moments and provides rigidity to the sheet.</p> |
