| 摘要 |
<p>This invention pertains to multilayer compositions, articles and process es for preparing and thermoforming said compositions and articles. Multilayer compositions exemplified comprise: (A) a first layer of a polyvinyl chloride composition comprising the specified compounding ingredients and represented herein by preferred embodiments; and at least one other layer (B) comprising: a polyvinyl chloride composition together with specified and preferred compounding ingredients and including a heat distortion temperature improving additive, wherein the heat distortion temperature of the dominant phase, preferably a single phase, is at least three degrees celsius higher than said heat distortion temperature of said first layer. Thermoformed articles of the invention are useful for example as inner-liners or door liner panels for referigerators where contact with HCFC chemicals, present in foam insulation, is necessary. Impact resistance is maximized, while chemical resistance and heat deflection temperature are maintained at performance levels acceptable in these applications.</p> |
