プラスチックパイプのかたさ試験における試料条件

概要

論文の詳細を見る
In order to establish a proper method for testing the hardness of plastic pipes, various kinds of experiments were perfomed on plastic pipes being used most commonly. From the results, it was possible to establish the most proper method. The main results obtained are as follows : (1) Pipes should be tested after 72 hours or more since they were molded. (2) In the case that the measurements are to be made at 5 spots on a pipe, the length of the samples should be more than 70 mm for type A,C, D and H, and more than 20 mm (except when pipes of the standard length are used) for type I. The thickness of the samples should be at least 4.0 mm for PVC, 3.0 mm for MA, 4.0 mm for P.P, and 3.5 mm for ABS. (3) The degree of final roughness of the surface of the samples should be 3.2 S, which can be achieved by using Emery Sandpaper #800〜#600.
社団法人日本材料学会の論文
1977-03-15