1. Modified PVC strip

Modified PVC rubber strip: the price is relatively low. Due to the different quality, low-end products use waste materials, substitute plasticizers and high filling amount, resulting in poor elasticity, easy hardening, sharp nose taste, easy migration, yellowing of the frame material and short service life. Because PVC products contain halogen, stabilizer containing heavy metals, it is not conducive to environmental protection, so foreign developed countries and domestic Beijing and coastal cities have eliminated or restricted the use of PVC tape.

2. Vulcanized EPDM sealing strip

The vulcanized EPDM rubber sealing strip is stronger than PVC rubber strip in terms of sealing elasticity and durability. However, due to the need for microwave vulcanization line shaping, the processing energy consumption is high, which is usually more than 20 times that of PVC processing. The product cannot be reused, is not environmentally friendly, and is not a product advocated by the state. So the basic door enterprises are not used.

3. Thermoplastic EPDM sealing strip

Thermoplastic EPDM rubber sealing strip This sealing strip is a new material developed on the basis of imported technology from abroad and domestic independent research and development in recent years. It is mainly used for automobile door and window sealing strips, and has been used for building door and window sealing strips in recent years.

The outstanding advantages of thermoplastic EPDM sealing strip are:

① The performance and service life are equivalent to the vulcanized EPDM rubber sealing strip.

② Processing energy consumption is low relative to vulcanized EPDM strips (equivalent to PVC).

It does not contain heavy metals such as halogen and lead, and can be recycled after several years, which meets 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 unit price is high and the actual use cost is low. This product has been very rapid development in the use of building doors and windows in recent years.

Characteristics of high quality door and window sealing strip

1. Light bulk density, high telescopic strength, non-absorbent (instead of traditional three-oil four felt, asphalt wood fir board and other materials). Product environmental protection, simple construction, anti-seepage, anti-leakage, good water effect.

2. Corrosion resistance, aging resistance, high and low temperature resistance 80 ℃ ~-45 ℃, no flow, no deformation, no embrittlement, long service life.

3, with independent opening bubble structure, special type joint plate appearance for honeycomb holes evenly distributed, without burring can be tightly bonded with cement/sealant into one, adapt to the natural expansion and contraction changes, enhance the joint sealing expansion water stop effect.