试验步骤：Test steps

  试验的矩形试件尺寸（150±1）mm×（25±1）mm,试件从试样宽度方向上均匀的裁取,长边在卷材的纵向，试件裁取时应距边缘不少于150mm,试件应从卷材的一边开始做连续的记号，同时标记卷材的上表面和下表面。

Test of rectangular specimen size (150 + 1) mm x (25 + 1) mm, uniform cropping specimens from the sample width, long edge in vertical coil, specimen cropping should be away from the edge of not less than 150 mm, specimen from one side of the coil began to make a continuous mark, mark coil on the surface and under surface at the same time

　去除表面的任何保护膜，适宜的方法是常温下用胶带粘在上面，冷却到接近假设的冷弯温度，然后从试件上撕去胶带，另一方法是用压缩空气吹[压力约0。5Mpa(5bar),喷嘴直径约0。5mm]，假若上面的方法不能除去保护膜，用火焰烤，用zui少的时间破坏膜而不损伤试件。

Remove any protective film on the surface, the appropriate method is room temperature use sticky tape on it, cold bending temperature cooled to near hypothesis, and then removing the tape from the specimen, another method is to use compressed air to blow [pressure about 0. 5 mpa (5 bar), nozzle diameter 0. 5 mm], if the above methods can't remove the protective film, roasted with fire, destruction of membrane with the least amount of time without damage to the specimen.

　试件试验前应在（23±2）℃平板上放置至少4h,并且相互之间不能接触，也不能粘在板上。可以用硅纸垫，表面的松散颗粒用手轻轻敲打除去。

Specimens should be in before the test (23 + 2) ℃ tablet placed at least 4 h, and can't contact with each other, also can't stick on the board. Can use silicon paper pad, loose particles on the surface of the knock gently to remove by hand