How to endow the silicone mold with higher tear st...

It is common knowledge that the parameters of performance that we should take care of is hardness, viscosity, tensile strength, tear strength, elongation, etc. when we purchasing the silicone raw materials used to make silicone mold. So, choosing the high quality silicone is one of the methods of obtaining higher tear strength mold. Then, if there are other means to strengthen the tear strength resistance is a topic that we can think of.   How to endow the silicone mold with higher tear strength? I can ask the question in a different way. Why is the tear strength of the silicone mold weak or what factors make the silicone mold has a weak tear strength? The first and perhaps key factor is the addition of too much silicone oil. To improve the accuracy of replication, reduce the viscosity of silicone rubber, adjust the mold hardness and improved operating performance, you may add a lot of silicone oil into the silicone rubber when making silicone mold, which has a greater impact on the acquisition of higher tear strength mold. The result of adding silicone oil may debase the hardness and tear strength, but increases the elongation of silicone rubber, thus reducing the "stretch stress" of silicon rubber. Therefore, for some more complex prototype, this stretch of certain parts of the silicone mold becomes larger for releasing. At this time, you can add appropriate amount of silicone oil. Although the tear strength will be reduced, the silicone mold is not likely to cause tearing because the modulus is small. Then the turnover times also will be improved.     Secondly, some dates prove that the amount of curing agent controlled well is also good for a higher tear strength mold. The silicone rubber can not achieve full vulcanization or cure if too little of catalyst, while, too much curing agent has an effect on the elongation and tear strength of silicone mold. So, more appropriate dosage should be in the 1.5% - 2.0%.   Besides, to get higher tear strength mold, some details you should also pay attention to. For example, if you make the silicone mold with the method of brushing, you should paste a layer of gauze or cloth to gain elongation and higher tear strength mold after brushing the two layer of silicone rubber. This process can be repeated for two or three times. Again for instance, the choice of hardness is worthy of your attention. The silicone mold using the silicone raw material with high hardness will be very brittle and easily broken for making silicone mold for small products or the products with complex pattern.   Shenzhen Hong Ye Jie Technology Co., Ltd is global leading silicone rubber manufacturer. If you want to possess the higher tear strength mold, please opt for the most superior & suitable silicone raw material. If you want to get further information about how to endow the silicone mold with higher tear strength, please feel free to send an e-mail at info@szrl.net or tour our site at http://www.szrl.net, thank you!