It will not judge how the stickiness of the stretch film should be detected

The viscosity of stretch film is a very important product feature, because when packing the goods, if the stickiness is not good, then the goods cannot be wrapped well together and are easy to loosen. So when we buy, the viscosity index is also what we need to test, and the film with good viscosity will be stronger when used. When we buy, how to judge its stickiness?
For tensile film viscosity test, there should be three reticles on the test slope for the first time, and there should also be scale lines indicating different elongation rates of the specimen on the test bevel. The distance between the scale marks and the top edge of the inclined plane is 0mm, 50mm, 75mm and 100mm, respectively, and the corresponding specimen elongation is respectively; Unstretched, stretched 50%, stretched 100% and stretched 200%.
take a group of samples, 500mm×125mm specimens, longitudinally consistent with the length direction of the inclined plane, tiled and fixed on the test slope, the inner side down, find the corresponding scale mark on the inclined plane according to the required tensile magnification, and mark the line on the specimen according to the scale; Use the guide rod to evenly stretch the specimen so that the reticle reaches the top of the inclined plane and locks the specimen; Align 180mm×25mm, longitudinally and beveled, one end of the specimen is aligned with the top of the bevel, tiled to the fixed specimen, the inner side down, and use a special brush to glue the two specimens flat; Curl the upper specimen from the lower end of the bevel to the midline of the inclined plane, and clamp the curled part firmly with a fixture; Pull the fixture at a speed of 125mm/min ±12.5mm/min until the two specimens are separated, record the Zui strength value during separation, and read accurately to 0.1N. Longitudinal elastic recovery, deformation and tensile force retention elastic recovery is the ratio of the recovered size of the stretched film to the original size after a certain proportion of stretching for a certain period of time, expressed as a percentage.