1) A large stroke is required for testing rubber. Since rubber deforms a lot during stretching, especially for latex products, the elongation may be as high as 1000% or more. Therefore, before the rubber sample breaks, it is necessary to ensure that the gripper of the rubber tensile testing machine has sufficient stroke.
2) High-precision and high-frequency data acquisition Stretching rubber does not require a large force, and the tensile force measurement range does not need to be large, so the precision of the force value is required. It is generally required that the testing machine can obtain the force value with an accuracy of more than two decimal places. The accuracy of the rubber tensile testing machine of Suzhou Gopin is within ±0.5%. In addition, since testing the tensile properties of rubber requires several tensile force values during the tensile process, and the tensile test is not repeatable, the immediate and accurate recording of the tensile force value of each test section plays a very important role in the success or failure of the test.
3) Accurate gauge length measurement and recording device The measurement of the gauge length of the sample is an important data for calculating the elongation of rubber, so the tensile testing machine must accurately measure the strain of the sample in the rubber tensile test and record it immediately .
4) The device that can accurately describe the stress-strain curve There is a close relationship between the tensile force value and the gauge length in the tensile specimen. For example, the tensile stress of the specimen needs to be measured when the specimen is stretched to a given elongation. Force value, while a given stress requires measuring the gauge length at which the specimen is stretched to a given stress. After the test is completed, the accurate stress-strain curve can reproduce the test process, and clearly reflect the value of each test section, which is convenient for calculating the items required by the test.
