| 摘要 |
<p>The invention relates to obtaining weatherability or U.V. light stability in vinyl polymeric translucent and transparent materials, which are designed for use in corrugated roofing, films for greenhouses and the like, and provides a composite of a vinyl polymeric material, where the main material or substrate is a transparent or translucent vinyl polymer capped with a plasticized vinyl polymer containing a clear U.V. light absorber or stabilizer, for example, l-cyano-2,2-diphenyl ethylacrylate, having excellent weatherability, preferably a poly vinyl chloride substrate is capped with a thin film of a plasticized poly vinyl chloride capstock containing a high level of a clear U.V. light absorber and the U.V. stabilizer is concentrated at the surface of the composite.</p> |
