methods of sealing strips for building doors and Windows

According to the chemical type of sealing strip products to classify, at present, the sealing strip commonly used in building doors and Windows mainly includes polyvinyl chloride (PVC), thermoplastic elastomer (TPE), ethylene propylene ternary rubber (EPDM), silicone rubber (SR) and other types. The performance comparison is shown in Table 1.

1, PVC type sealing strip

PVC sealing strip for the earliest use of sealing strip, its advantages are simple process, low cost, good coloring, can melt welding; Disadvantages are poor weather resistance, poor high and low temperature resistance, poor compression resilience, plasticizer migration, easy to cause profile pollution discoloration. Only a few indoor doors and Windows are used at present, gradually eliminated by the market.

2, TPE type sealing strip

Thermoplastic elastomer is a new kind of polymer material between rubber and resin. It has the elasticity of rubber at room temperature, and can be plasticized at high temperature. Its advantages are simple process, good weather resistance, good coloring, can melt welding; Disadvantages are high temperature resistance, compressibility resistance, tensile strength and elasticity and other poor performance and high price.

3, three ethylene propylene sealing strip

Epdm is a copolymer of ethylene, propylene and a small amount of non-conjugated diolefin. It has good weather resistance, excellent tensile strength and moderate price. Disadvantages are poor resistance to high and low temperature, single color, and a certain smell of rubber. At present, it is widely used in the market.

4, silicone rubber sealing strip

Silicone rubber has the same siloxane main chain as silicone rubber, and has the most excellent weather resistance, elasticity, compression and permanent deformation, which can ensure the sealing of doors and Windows for long-term use; Can be adjusted out of any color, improve the beauty of doors and Windows; The wide temperature range makes the silicone rubber sealing strip the first choice for the door and window sealing strip in the lower temperature areas in the north; Non-toxic and tasteless meet the requirements of healthy life.