Abstract
This chapter deals with the prediction of maximum field service temperatures from solar reflectance measurements of vinyl. A number of vinyl building product manufacturers are familiar with The Standard Test Method for Predicting Heat Buildup in PVC Building Products according to ASTM D 4803 that utilizes an insulated box to house a specimen irradiated by an IR heat lamp. Recent failures of rigid vinyl materials because of heat buildup and heat distortions have been observed even though ASTM D-4803 analysis indicates acceptable performance. Use of empirically derived heat buildup data and optical properties measurements can significantly improve a producer's ability to predict maximum field service temperatures of vinyl materials. Use of empirical field methods described in the chapter in addition to laboratory tests can identify robust design criteria, enhance a product's service performance and ultimately contribute to customer satisfaction.
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