At present, China's building energy consumption accounts for 27.5% of the total energy consumption of the whole society. The energy lost through the gap around the closed door and window is usually about 37-40% of the building energy consumption. Therefore, it is very important to improve the sealing performance between the fan frame and the glass, especially between the window frame and the window sash. At present, the sealing strip market is mainly composed of modified PVC, ethylene propylene diene monomer (EPDM) and thermoplastic EPDM rubber (EPDM/PP). category
Modified PVC strip
The price is relatively low, because the quality is different, the price is generally between 6,000 yuan and 15,000 yuan / ton. Due to the use of waste materials, substitute plasticizers and high filling amount, the low-end products are so poor in elasticity, easy to be hard, have a scent of nose, easy to migrate, make the frame yellow, and have a short service life. A small number of door and window companies that are competing in low-level prices are still using them. The medium and high-end PVC strips can reach the standard index and the service life is relatively long. At present, there are quite a few door and window enterprises in the city.
Because PVC products contain halogens and stabilizers contain heavy metals, they are not conducive to environmental protection. Therefore, foreign developed countries and domestic Beijing and coastal cities have eliminated or restricted the use of PVC strips. At present, some enterprises in the city have begun to upgrade the use of EPDM seals.
2. Vulcanized EPDM rubber seal
In terms of durability of sealing elasticity, it is much stronger than PVC strip. However, due to the need for microwave curing line shaping, the processing energy is high, usually more than 20 times that of PVC processing. The product can not be reused, not environmentally friendly, not advocated by the state. product. In addition, the proportion of materials (1.4 or more) of this type of products is comparable to that of PVC (the proportion of low-end vulcanized EPDM rubber strips is larger). The window-out rate is similar to that of PVC strips. The cost of use is relatively high, and it is difficult for doors and windows to accept.
3. Thermoplastic EPDM seals
The sealing strip is a new material developed on the basis of foreign imported technology and domestic independent research and development in recent years. It is mainly used for automobile door and window sealing strips. In recent years, it has been used for building door and window sealing strips. Its outstanding advantages are:
1 Performance and service life are equivalent to vulcanized EPDM seals.
2 Processing energy consumption is lower than that of vulcanized EPDM rubber (comparable to PVC).
3 It does not contain heavy metals such as halogen and lead, and can be recycled after several years, in line with the requirements of green building materials.
4 The specific gravity is small (only 0.9-0.95) and the window rate is high. It seems that the purchase price is high and the actual use cost is low. This product has developed extremely rapidly in the use of building doors and windows in recent years.
Product Features
1. The weight is light, the telescopic strength is large, and it does not absorb water (replaces the traditional three-oil four felt, asphalt wood board and other materials). The product is environmentally friendly, easy to construct, and has good anti-seepage, leak-proof and water-stopping effects.
2, corrosion resistance, aging resistance, high temperature resistance +80 ° C ~ -45 ° C no flow, no deformation, no brittle fracture, long service life.
3. It has an independent open-cell bubble structure. The appearance of the special-shaped joint plate is evenly distributed in the honeycomb hole. It can be tightly bonded with the cement/sealing glue without fluffing, adapting to the change of natural expansion and contraction, and strengthening the joint. Seal expansion and water stop effect.
Product range
Can be widely used in machinery, doors and windows, curtain walls, rivers, dams, ports, docks, underground caves, water conservancy and electric power, airports, bridges and other concrete water joints.
product instructions
This product can be used in a variety of ways as appropriate during construction. According to the use environment of the product, it is divided into: 1. Card slot type. The used part is a card slot, and one end of the sealing strip is inserted into the slot during use. 2, self-adhesive type. The use part is flat, and the self-adhesive sealing strip is used to remove the release paper of the sealing strip and pasted. 3. Self-tightening seals. The used part is a thin plate. When using, the sealing strip U-shaped can be stuck on the thin plate. Easy to install. And according to the angle of the thin plate is divided into a straight card, and a side card. Wait.
