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The cause and several forms of bubble caused by silicone tube
Silicone tube in the production technology is not good in the case of bubbles, then there are the reasons for the bubble and the form of the several?
First of all, the reason of the bubble caused by silicone tube.
1, the gas is in the process of mixing with the glue, there is the filler adsorption of moisture, filling the inner hole with air, will expand after heating overflow.
2. If the gas is out of the spill, if the rubber is not crosslinked, the gas will follow the expansion of the rubber and the mold is discharged..
3, if the rubber crosslinking is complete, the flow of gas is limited, can not form can see bubbles, microporous, but gas is still.
4. If the external curing of the rubber products is finished, Chibe Naomi can achieve the positive curing. After the mold pressure is released, the gas flow inside the mold can aggregate into the micro hole..
Secondly, several forms of bubble in silica gel tube.
1, long time curing at low temperature, glue heating for a long time, a slow start sulfide, gas enough time to discharge the mold. At this time fewer defects within the rubber, vulcanized physical performance was higher.
2, low temperature and short curing time, sizing partially cross-linked, gas can not be completely discharged bubbles produced. At this time the bubble WIP surface.
3, the high temperature for a short time, especially on thick products, the surface has complete vulcanization, internal has just begun, discharge pressure within the gas expansion, at this time of the bubble more WIP center.
4, the high temperature, the internal gas is suppressed, there is no defect in the table, but the micro gas has been in the internal rubber, easy to produce more defects, physical properties are not high.
This paper is from Shenzhen, odd Silicone Rubber Co., Ltd.: id=427? Http://www.szhcty.com/news_v.asp
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