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Problems of cracking of silica gel products
Some silica gel products factory production of hollow, tube rings in class or in class cracking at the parting line of silicone products, gas phase white carbon black, tear resistance can be a good thing, it is not easy to crack Qiyu silicone rubber to. Data show that a new type of gas phase white carbon black can solve the problems of cracking and vulcanizing agent had 220 of the oxidation of cumene, DBPMH, BP and dCBP. And the DBPMH dosage on the performance influence, want to know the reasons for cracking, new gas phase white carbon black and usually is not the same as what, increase the amount of white carbon black can not solve the problem, and in the usual C-8B C-8A of the C-13 like with DBPMH, BP and dCBP is what? Below on the concrete analysis of the problem of the cracking of silica gel products.
Guess one: if it is a gas, then there should be no problem. I guess it is the so-called new gas phase white carbon black is not size or surface has been some special treatment and higher activity. Amount of white carbon black is has an optimum value, and not add more tear resistance are increased, should be like a parabola changes.
Guess two: the so-called C-8A C-13 C-8B, which is called the anti yellowing agent, I estimate that it is a mixture of a variety of peroxide and some of the help of crosslinking agent. Of course I am not very clear. Most of the anti yellow agents are deceptive, yellow is the main reason for the selection of materials and curing temperature, the operation of the process can be solved
Guess three: you can use the low hardness, adding silica, C-8 curing, the size of the pressure, reduce exhaust.
Guess four: from the formula and the two aspects of the process, it is not necessarily a recipe for the problem, and you have a great relationship with the process. Silicone mobility is not too great pressure strength difference is easy to crack
Guess four: curing temperature do you pay attention to how many degrees? In what way?
Guess five: I think you use the glue material may be problems, there is the curing agent, the general use of VC-8B is relatively good!
In short, the problem of cracking on the silica gel products, small series that is the two aspects of the formulation and process of silicone products. Some of the rest of the problem, some of it. Want to help you.
In this paper, from Shenzhen City, Qi Yu Silicone Rubber Co., Ltd.: http://www.qygxj.com
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