Door seal seals generally what

Market with a wooden door seal material is generally of PVC, soft PVC in its key role in its inside is nothing more than adding plasticizers good or bad, there are currently more stable plasticizer dioctyl phthalate resin, two small fat. But now the market price is high, some unscrupulous traders are using some other cheap stuff instead of (waste oil, oil refineries remaining foundation, etc.) to consumers is a big risk.cable marker ties
Silicone seal is environmentally friendly, non-toxic, tasteless, etc., with excellent overall performance and good technical and economic effects, has been in aviation, aerospace, nuclear, electrical, electronics, instrumentation, automotive, machinery, metallurgy, chemical industry, health care, all areas of daily life to get a wide range of applications.
With the improvement of quality of life, more and more doors silicone seal replacement of PVC door seal, but many users can not distinguish the following is inferior PVC seal and advanced silicon rubber seal identification method:
One, with the smell whether there smell, the general PVC seal will be very pungent odor, normal silicone seal will only have a little something taste, taste is very small, almost smell.
Second, while the PVC seal and silicone rubber seal, a period of time at a high temperature (on the roof or a sunny place), PVC sealing strip short time become very soft, and some will be sticky, sticky on the object on. The surface of the grease seal precipitated contaminated dust, and yellow (very easy to suck the oil soil) permeability, left the dirty physical properties of silicone rubber sealing strip did not change, the family used a pressure cooker ring is silicone rubber, that is, use of non-toxic silicone rubber high temperature and environmental performance, silicone rubber 200 ℃ working environment, no significant changes in physical properties.
Third, while the PVC seal and silicone rubber seal on the freezer, place a few hours, PVC sealing strip will become feel very stiff, easily broken, the physical properties of silicone rubber sealing strip unchanged. -50 ℃ silicone rubber physical properties without significant change.
Fourth, some of the cheaper prices will be a lot of filler seal, so the surface will not be very bright, dull, cut off seal off sections will be very rough, feel stiff, stretched almost inelastic, silicone rubber seal bright colors, texture soft, stretched extremely flexible sealing strip cut, broken section into a delicate sheen.
Five, silicone rubber seal burning almost smokeless, odorless, combustion, burning substance was a white powder.plastic truck seals
Six, burning, PVC sealing strip combustion blistering, shrinkage, take black acrid smoke, combustion is not sufficient, leaving hard plastic residue.
Seven, look at the proportion of how much energy per kilogram of rice. PVC seal traders in the use of fillers made a great play tricks, some manufacturers for the pursuit of greater yields, (save a little electricity) using talcum powder, TSP do things like fillers, greatly increasing the proportion of seal products, (Our users generally buy mostly in kilograms, according to the length of use) so that virtually has actually increased costs severely reduced the quality Debu attempt. Add TSP PVC seal, you stretched by hand back and forth several times, the surface will be a small amount of a white powder. PVC seal the density should be 1.4-1.6. Silicone seal applied nanoscale silica as a filler reinforcing effect, light texture, density, specific gravity 1.1-1.25 between, so the volume ratio than PVC sealing strip 20% more.
Door seal basic function is thermal insulation, sound insulation, wind and dust, the actual key to seal, seal quality seal plays an important role. With a variety of petrochemical products prices continue to rise, some irresponsible manufacturers began aspects of unfair competition from the raw material (the so-called shoddy, shoddy). These affordable, even as low as 2-3 cents per meter seal doors of factories became irresponsible choice because they are a few hundred dollars doors almost no cost, resulting in a decrease in quality doors , l brought many hidden dangers (air leakage, no dust, no noise increases the heating and air conditioning costs), more harm than good, it is worth considering.