The tensile strength of adhesive joints that can resist the ultimate capacity rubber tensile failure, tensile test piece refers to fracture when the unit section of the load, also known as tensile strength, tensile strength, unit MPa (MPa). Tensile strength is generally used as the main physical and mechanical standard in rubber joint industry.
The cutting of sample can be done by punching machine. When punching sample, the following points should be paid attention to.The cutting force is uniform, not too large, and with mild soap and water and clean tap water wet specimens (or tools), if a sample cut down, it should be abandoned, not to repeat the old mark for cutting.The direction of specimen cutting should be consistent with the direction of tension and the direction of rolling.
The tensile strength test specimen is dumbbell shaped and can be divided into 1, 2, 3 and 4 types, of which type 1 is universal, and the specific dimensions of each part of the sample are as follows:For non-standard specimens, that is, the maximum thickness of the narrow part of the sample taken from the finished product is specified as: type 1 is 3.Omm, type 2 and type 3 are 2.5mm, and type 4 is 2.Omm.
In the middle of the specimen, 4 parallel lines marked by the mark mark are used to mark two distances equal to the standard distance (type 1 is 25mm, type 2 is 20mm, and type 3 is lOmm), and each reticle shall be equidistant from the center of the sample. If the non-contact deformation measuring device is used, the proper marking device shall be used, and two parallel markings shall be placed on the narrow parallel part of the sample. Each mark shall be equidistant from the specimen center and perpendicular to the long axis of the specimen, and the specimen shall not deform during the marking.Style cutting, punching machine blanking note the above points, is to test the tensile strength of rubber joints based on, but also guarantee.
