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1.rubber hardness Test method of indentation hardness based on GBT531.1-2008 rubber pocket hardness tester contents and requirements Instruments and equipment: Shahr hardness tester (type A, D) Environmental conditions: the laboratory temperature is 23 C + + 2 C, the relative humidity is 60%~70231 Test method: the specimen thickness is at least 6mm. If the thickness of the sample is less than 6 mm, it can be stacked with no more than 3 layers of smooth, parallel samples with each layer thickness not less than 2 mm. The specimen must have enough area to make the needle and specimen contact position at least 12mm from the edge. Place the specimen on a solid plane, hold the hardness tester, press the pin at least mm from the edge of the specimen, press the pin smoothly on the specimen, and read it within 3 seconds after the full contact of the pin with the specimen. Results: the hardness values were measured 5 times at different locations of 6mm, and the median was taken. Feilong Jiangli will update the more inspection rules for automobile rubber parts