A comprehensive explanation of the hardness of the Automotive Wiring Harness Protection Sleeve?

No matter what item has hardness, the calculation of hardness of different items is different. For example, the protective cover of Automotive Wiring Harness Protection Sleeve is a special case, and its calculation method is Shore hardness.

Shore hardness: refers to the reading of the value measured by the Shore hardness meter. Its unit is "degree". Its description method is divided into A and D, which represent different hardness ranges. A hardness tester is used to test, and the Shore D hardness tester is used to test and obtain data for 90 degrees and above.
When testing the hardness of the car harness protective cover, you can first feel the softness and hardness with your hands. If it is soft, use the Shore A hardness tester; if it is hard, use the Shore D hardness tester.
Under normal circumstances, if the hardness of the Automotive Wiring Harness Protection Sleeve is lower than 30 degrees, bubbles and white spots will appear during production. The air stroke is also shortened as much as possible, and the amount of vulcanizing agent added is appropriately reduced. Secondly, the molding mold temperature of the automotive wiring harness protective cover can be increased appropriately, but the temperature should not be too high, otherwise edge bursting will occur. If air pockets (bubbles) and white spots appear, the vulcanization time should be prolonged.
In short, the hardness of the Automotive Wiring Harness Protection Sleeve produced by the Automotive Wiring Harness Protection Sleeve manufacturer is generally 30-80A, 40A and 60A are the most common, and some specific hardness will be produced according to special requirements.