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塑料试验方法。第1部分:热性能-方法131B:柔性聚氯乙烯板热老化后延展性的测定

 

 

BS 2782-1这种方法确定了薄膜或薄板产生裂纹的特征温度，作为其低温性能的指导。冷裂纹温度不应被视为与材料的低温极限相同，因为受每种材料的使用条件的影响。

 

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 塑料的试验方法.第2部分:电气性能.试验方法250A:薄膜抗静电性.电荷减少法