PVC sealing strips have become the favorite of plastic steel door and window sealing strips because they do not crack and are easy to weld. But only 2-3 years, the problem appeared. The separation of PVC plasticizers, a difficult international industry problem, has been clearly reflected in PVC sealing strips.
Due to the separation of the plasticizer, the profile is polluted by the rubber strip, the length is shortened, the broken section is shortened, and the problems of poor sealing abound. However, Chinese-style small workshop processing, Chinese-style cost reduction, and Chinese-style low-price competition by door and window sealing strip manufacturers have led to the use of defective plasticizers and recycled PVC, which has exacerbated the problems of the entire sealing strip industry. The end of PVC sealing strip is beginning to appear.
EPDM EPDM sealing strips In early 2000, the country issued a civil order to restrict the use of polyvinyl chloride PVC sealing strips, and promoted the use of EPDM EPDM sealing strips and MVQ silicone rubber sealing strips. EPDM sealing strip, a high-grade sealing strip used in cars and trains, has finally been adopted by the construction industry.
In fact, it was widely used in the door and window industry after 2002. At that time, doors and windows gradually entered the era of broken bridge aluminum alloys. EPDM became synonymous with high-grade sealing strips due to its superior physical properties and good aging resistance. In 2011, affected by international oil and other factors, the price of ethylene propylene soared, and the winter of EPDM sealing strips came, so Chinese wisdom came, reclaimed rubber began to be used in large quantities, and the entire sealing strip market was in chaos. Good seals are hard to come by. Door and window sealing strip manufacturer@门Window气气调板厂家A certain county in China is the base of domestic sealing strips, and about 70% of China’s EPDM building sealing strips come from this county. There is a boss in the same profession in this county, and 70% of the country’s ethylene-propylene sealing strips come from us.
Silicone rubber sealing strip is not so much the latest material for sealing strips, but it is not. Silicone rubber has a history of decades in China. Door and window sealing strip manufacturers are indeed the favorites of rubber in the past few years, and they are very delicate. In recent years, the cost has gradually decreased, and they have been gradually applied to building seals.
Compared with ethylene-propylene rubber, the advantage of silicone rubber for sealing is that it has better shrinkage and deformation performance than ethylene-propylene rubber, so the sealing performance is better, and from the principle of time-temperature equivalence, silicone rubber can withstand temperatures up to 300 ° C, and is resistant to ethylene-propylene rubber. The rubber is at best 180°C. Under the same temperature, the life of silicone rubber is twice that of ethylene propylene rubber, and the service life is longer. And it has excellent physiological inertia, non-toxic, tasteless, silicone rubber also has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance and other functions, the outstanding function of silicone rubber is the use of wide temperature, can Use the door and window sealing strip manufacturer for a long time at -60°C (or lower temperature) to +250°C (or higher temperature). So silicone rubber is an ideal choice for building seals in the modern era.
Post time: Sep-01-2023