With the rise of silicone products, more and more people use silicone sealing ring, and silicone seals are used more and more in daily life. In the market, not only silicone seals but also PVC seals circle, so is there any difference between the two? Where is the difference?
1. High-temperature resistance. Put the PVC sealing ring and the silicone sealing ring at the same high temperature. After waiting for a while, the silicone sealing ring does not change, but the PVC sealing ring becomes soft and yellow, and the oil seeps out. Then give the silicone sealing ring separately. When heated to 300 degrees, the silicone sealing ring remains physically stable without any change.
2. Low-temperature resistance. Put the PVC sealing ring and the silicone sealing ring at the same low temperature. After standing for several hours, the PVC sealing ring will not only become rigid but also feel bad and easy to break. On the other hand, the silicone sealing ring, even at a low temperature of minus 49 degrees physical properties remain unchanged.
3. Appearance and quality. If too much filler is added to the PVC sealing ring, it will lead to poor quality, dull product appearance, unsightly interface, hard, not easy to stretch, poor elasticity, and the price will be relatively cheap; on the other hand, silicone sealing ring, The interface is beautiful, the appearance color is more saturated, the hand feel is comfortable and the elasticity is excellent.
Fourth, the quality. In order to increase production and save costs, some sealant manufacturers cut corners or use relatively cheap materials to make sealants, such as: using talcum powder, heavy calcium powder, etc. to make sealants, which will increase the proportion of the product, It can be sold at a higher price (usually buyers buy by the pound), which will affect the quality, and the quality of the PVC sealing ring made of this sealant will also be poor if it is stretched multiple times White powder will appear on the surface. Generally, the density of the PVC sealing ring is about 1.4-1.6; while the silicone sealing ring is made of nano-scale silica as a filler, and the product produced is relatively light, with a density of 1.1-1.25. The yield is 20% higher than that of the PVC sealing ring.
5. Combustion. When the silicone sealing ring is burned, it is smokeless, non-toxic, harmless, and odorless, and can be fully burned; when the PVC sealing ring is burned, there is black pungent smoke, and the combustion is not sufficient, leaving residues.
The above is the whole content of this article. After reading it, do you understand the difference between the two? If you have any product requirements, please contact our Custom Special Rubber Seals Factory.