What are the appliances for drawing plastic films?
Samples can be selected according to different products or according to the existing product standards. Under normal circumstances, the larger elongation, try not to use too wide testSample. Any test machine and thickness gauge that can do tensile test and meet the relevant requirements can be used as test instruments and equipment. Operate the test machine according to the specified speed, if there is no gaugeFixed speed, the choice of hard materials at low speed, soft materials choose higher speed. If the specimen is broken beyond the mark line, the sample will be void and the specimen will be re tested.
Available breaking force (N) or pullStretch strength (Mpa) indicated. Sample shape and size are often used in four types, and type I, II and III are dumbbell shaped specimens. Type IV is a strip type specimen with a width of 10 to 25mm, and the total length is not less than150mm, the standard distance is at least 50mm.
The tensile strength is divided into longitudinal and transverse directions. Plastic film material in a certain direction, through the tensile fixture test speed, tensile until fracture, showing the carrying capacity.
