Doors and windows sealed resolve the classification and characteristics

At present China's building energy consumption Pat total social energy consumption of 27.5% in the terminal, strictly closed doors four weeks through gap energy loss typically accounts for 37-40% of building energy consumption. Therefore, improving the fan frame and the glass between the window frame and sash especially between the sealing performance is very important.
Currently seal market, mainly with modified PVC, vulcanized EPDM rubber (EPDM) and thermoplastic EPDM rubber (EPDM / PP) tape-based.
1 modified PVC strips
The price is relatively low, because of the quality of different strengths and weaknesses, the price usually 6,000 yuan 15,000 yuan / ton. Low-end products due to the use scrap, alternative plasticizers and high filler content to make the strip elasticity is poor, prone to hard, there assassination nose smell, easy to migrate the frame material yellow, life is short. Price competition in a few low-level doors and windows of businesses are still using. The high-end PVC strips can reach standard indicators, relatively long service life that the city has a considerable selection of doors and windows.
Because PVC products containing halogen, stabilizers containing heavy metals, it is not conducive to environmental protection, so in developed countries and domestic coastal cities of Beijing and Pat eliminate or limit the use of PVC strips. Currently the city there are also some companies began to upgrade using EPDM seal.
2 vulcanized EPDM rubber seal
In sealing elastic persistence than PVC strips have greatly strengthened, but due to the need of microwave curing line shape, machining high energy consumption, which is usually 20 times more than PVC processing, products can not be recycled, environmental damage, not the national advocacy products. In addition, the proportion of this type of product materials (1.4 and above) with PVC type quite (low vulcanized EPDM seals greater proportion) of the window with PVC strips similar rate, the use of relatively high cost, doors and windows are difficult to accept.
3 thermoplastic EPDM rubber waterproof labels
The seal is imported from abroad in recent years, independent research and development of technology and developed on the basis of a new material, mainly used for automobile doors and windows sealed, in recent years begun for the building doors and windows sealed. Its outstanding advantages are:
① performance and service life with vulcanized EPDM rubber security seal fairly.
② processing vulcanized EPDM strip with respect to energy consumption low (with PVC quite).
③ halogen and lead, heavy metals, plus a few years later recyclable, meet green building requirements.
④ proportion of small (only 0.9-0.95) the window is high. Purchase price seems high, the actual use of low cost.