Epdm rubber sealing strip is mainly used in automobile doors and Windows sealing strip, and has been used in building doors and Windows sealing strip in recent years. Its outstanding advantages are:
1. Its performance and service life are equivalent to those of the vulcanized epdm rubber sealing strip.
2. The processing energy consumption is lower than that of ternary ethylene propylene sulfide rubber strip (phase with PVC).
3. It does not contain heavy metals such as halogen and lead, and can be recycled after a few years. It meets the requirements of green building materials.
4. Low specific gravity (only 0.90-0.95) and high window discharge rate. It seems that the purchase price is high and the actual use cost is low.
1) Light bulk weight, large telescopic strength, non-absorbent (instead of traditional three oil four felt, asphalt wood fir board and other materials). Environmental protection products, simple construction, anti - seepage, leakage, water - stopping effect is good. 2) Corrosion resistance, aging resistance, high and low temperature +80℃~-45℃ no flow, no deformation, no brittle fracture, long service life.
5. Special type with independent opening bubble structure. The appearance of the joint plate is evenly distributed with honeycomb holes, and it can be tightly bonded with cement/sealant without the need of furring. It can adapt to the changes of natural expansion and contraction, and enhance the sealing expansion and water stop effect.
Rubber and plastic PVC sealing strip
Rubber and plastic PVC sealing strips are formed once by microwave curing process, with smooth and beautiful surface, good elasticity and compression deformation resistance, weathering resistance, ozone resistance, chemical resistance and wide range of temperature (-40℃~+120℃), etc., which have been widely used in automobile doors, Windows and curtain walls and other manufacturing industries.
PVC low-end products due to the use of waste, alternative plasticizer and high filling volume, to make the rubber strip poor elasticity, easy to hard, there is a sting smell, easy migration to make the frame material yellow, short life. A few doors and Windows enterprises that are in low level price competition are still in use. Medium and high-end PVC strip can reach the standard indicators, the service life is relatively long. PVC products contain halogens and heavy metals in stabilizers, so it is not conducive to environmental protection.
Epdm rubber sealing strip, rubber and plastic PVC sealing strip difference: vulcanized epdm rubber sealing strip, in a sealed elastic than PVC glue has a lot to the strengthening of persistence, but because need microwave vulcanization line shape, high energy consumption of the process, usually is the 20 times above of PVC processing, the product can't recycle, not environmental protection, is not a product of the national advocacy. In addition, this kind of product material proportion (more than 1.4) and PVC class is similar (low-end vulcanized epdm strip proportion is greater) window rate and PVC strip is about the same, the use cost is relatively high, doors and Windows enterprise is difficult to accept.
Method for identifying epdm rubber seal strips
1. To observe the color, that is to observe the color of the rubber body carefully. Many counterfeits use low-end, inferior rubber, so the color of the ball produced is often particularly dark, in order to avoid being recognized by experienced people at first sight. Most of them polish the shoes with black shoe polish to make them look shiny and black before they leave the factory. But real EPDM rubber produced rubber joints, pure color, slightly dull color. It's not super bright or super dark.
2. The smell of rubber is actually the best way to judge. Because rubber contains alkenes, it has a pungent smell that normal people find offensive. Epdm rubber, however, is a polymer of ethylene, propylene, and is a highly filling material. Therefore, the vulcanized filled EPDM rubber does not have the pungent taste of ordinary rubber, instead, it is replaced by an aromatic taste. So as long as the user pays attention, it is not difficult to judge the real good goods.
3. The feeling of touch, that is, you carefully rub the inner layer of the rubber body, there will be a smooth feeling, due to the authentic epDM good quality, expensive. Therefore, the rubber soft joint produced is especially thin and smooth on the touch, while the ordinary rubber feel is far from good, there will be a touch of rough skin feeling.
Rubber and plastic PVC sealing strip identification
1. Smell with your nose whether there is an odor, the general PVC sealing strip will have a very pungent smell.
2.PVC sealing strips are placed at high temperature for a period of time (put on the roof or in a sunny place), PVC sealing strips will become very soft in a short time, the grease on the surface of the sealing strips is separated out, contaminated with dust, and yellow (oil is easy to absorb soil) oil infiltration, dirty hands.
3. Put the PVC sealing strip in the freezer of refrigerator and let it sit for a few hours. The PVC sealing strip will become stiff and easy to break.
4. Burning, PVC sealing strip burning will bubble, shrink, black acrid smoke, combustion is not sufficient, leaving hard plastic residue.
5. See specific gravity, how many meters per kilogram. PVC sealing strip vendors in the use of filler has great checkers, some in the pursuit of greater production, a bit (province electricity) using talcum powder, coarse whiting do such things as filler, greatly increased the proportion of sealing products, (our users are more commonly kg is favorable, according to the length of the use of) this virtually increases the cost of serious reduces the quality instead have to try. Add heavy calcium PVC seal strip, you stretch back and forth with your hand several times, the surface will appear a small amount of white powder.
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