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Silicone rubber hose hardness full explanation
No matter what things all have a hardness, but the hardness of different items is different. For example, silicone rubber hose is a special case, he is the calculation method of the shore hardness.
Shao's hardness is measured by the value of the value of the reading, the unit is "degree", the description method of A, D two, representing different hardness range, 90 degrees below the use of the A hardness test, and the data, 90 degrees and more than the use of shore D hardness test and draw data.
In testing the hardness of silicone rubber hose can first use hand to feel the soft and hard, if the soft words on the use of the A hardness test; if the hard words on the use of D hardness tester.
Under normal circumstances, the hardness of the silicone tube is less than 30 degrees when the bubble phenomenon, this time can improve the mold temperature method, the mold temperature is appropriate to improve. But the temperature should not be too high, otherwise it will burst phenomenon, this time can reduce the forming mold temperature, if there is wind package (bubbles) and white bad on the extension of the curing time. Forming temperature must be fierce, until the silica gel products, so far, do not think that a four or five degree of mold temperature can be resolved; the exhaust stroke and the number of times must be controlled, as far as possible, if you can reduce the exhaust stroke, can be appropriate to reduce the amount of curing agent.
In short, the Shenzhen odd silicone hose manufacturers to produce the silicone tube is generally 30-80A. Unless there are some specific hardness, generally to 40 degrees, 60 degrees is the most common. Under normal circumstances, some of the processing and production of silicone rubber hose hardness does not require, some have accurate requirements. Hope this article will help you, thank you!
This paper is from Shenzhen,, id=538?
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