The encapsulated sealing strip adopts the microwave vulcanization process to form once, the surface is smooth and beautiful, has good elasticity and anti-compression deformation, weather-resistant aging, ozone resistance, chemical resistance and a wide operating temperature range (-40°C~+120°C ) Such excellent performance has been widely used in automotive door and window walls and other manufacturing industries.
First, if you smell something with your nose, the general PVC seal will have a very pungent odor. Normal silicone rubber seals will only have a little taste of alcohol. The taste is very small, almost no smell.
2. At the same time, put the PVC sealing strip and the silicone rubber sealing strip under high temperature for a while (on the roof or in a sunny place). The PVC sealing strip will become soft for a short time, and the grease on the surface of the sealing strip will precipitate and be contaminated. Dust, and yellow (oil is easy to suck soil) oil leakage, stained hands dirty; silicone rubber seal physical properties have no change, the family used pressure cooker sealing ring is silicone rubber, that is, the use of high temperature silicone rubber and Non-toxic environmental protection performance, silicone rubber in the 200 °C working environment, no significant changes in physical properties.
Third, at the same time, the PVC sealing strip and the silicone rubber sealing strip are placed in the refrigerator freezer for several hours. The PVC sealing strip will become very stiff and easily broken, and the physical properties of the silicone rubber sealing strip will not change. No significant change in the physical properties of silicone rubber at -50 °C.
Fourth, some of the more inexpensive seal filler will be a lot, so the surface will not be very bright, dark color, cut off the cross section of the seal will be very rough, feel stiff, almost no elasticity, silicone rubber seal bright colors, feel It is soft, flexible, and cuts off the sealing strips.
Fifth, burning, PVC seal will burn, shrink, take the pungent black smoke, burning is not enough, leaving a rigid plastic residue.
Six, to see the proportion, how many meters per kilogram. PVC seals traders use their fillers to do their jobs. Some of them use larger amounts of talcum powder and heavy calcium to increase their output. Most of our users generally buy by kilograms, and use them according to their length. This would in fact increase the cost and seriously reduce the quality. Add a heavy calcium PVC seal and you stretch it back and forth several times by hand. A small amount of white powder will appear on the surface. The density of the PVC seal should be 1.4-1.6. Silicone rubber sealing strips use nano-silica as a filling reinforcing effect, light texture, density density ratio between 1.1-1.25, so the output rate is 20% more than PVC sealing strips.