BS 2782-1 Methods of testing plastics – Part1：Thermal properties-Method 131B：Determination of extensibility after heat ageing of flexible polyvinyl chloride sheet

BS 2782-1塑料試驗方法。第1部分:熱性能-方法131B:柔性聚氯乙烯板熱老化后延展性的測定

 

 

BS 2782-1這種方法確定了薄膜或薄板產生裂紋的特征溫度，作為其低溫性能的指導。冷裂紋溫度不應被視為與材料的低溫極限相同，因為受每種材料的使用條件的影響。

 

BS 2782-1This method determines a characteristic temperature at which cracks are produced in film or thin sheeting, as a guide to its low-temperature performance.The cold crack temperature should not be considered identical with the low-temperature limit for materials in actual service, since this is influenced by the conditions of service in each case. The maximum thickness depends on the stiffness of the material and the ability of the hammer to flatten the loop of material at the test temperature, but is about 1 mm for flexible sheeting.It is known that unsatisfactory results are sometimes obtained with thin polished plasticized PVC sheeting and PVC sheeting having a low plasticizer content.

 

BS 2782 Pt.2 Method 250A-1976 塑料的試驗方法.第2部分:電氣性能.試驗方法250A:薄膜抗靜電性.電荷減少法