The low-temperature hot-melt film is the best choice to replace the traditional chemical port in the market. How to distinguish the quality of the product? If we don't have the corresponding testing equipment, the most effective way is to identify it from the following aspects.
First: measuring the specifications and thickness of the product, the main product specifications in the market are 1 meters *1.5 meters, 1 yards of *1.5 code and 1 yard door rolling materials, and 1 yards are equal to 0.914 meters. The thickness of the product is 0.4mm-2.0mm, with a caliper or a thickness meter, so the measurement is the first step.
Second: boiling water immersion, the low temperature sheet two with the thickness of the sample size, cut 1cm*5cm mark, at the same time, just go into the boiling water cup, observe two samples softening time, softening the faster that product quality is excellent, the viscous better, its composition content of TPU is higher, with higher recovery material the product, the softening rate is slower, less viscous. Taking a sample, observe the hardening time, faster hardening, product quality is poorer, shoe factory in drawing, if hardened too fast, lasting operation is more difficult;
Third: compared to the hardness of the product, most shoe factories have no hardness tester, which can only be used to test the hardness of the product. The better the quality of the product, the better the hardness, the shoes will be made after the more beautiful, wear also more comfortable.