There are many doors and windows on the market, and sealing strips are important accessories in doors and windows. How can we distinguish the quality of sealing strips? Check out this article! 1. Combustion method (rubber strips that can distinguish between thermoplastic and rubber types)

A. Rubber strips turn into ash after combustion and cannot be brushed. The ash content is white, and the one that remains white after rubbing on white paper is silicone rubber; The ash is black, and the rubber that turns black after rubbing on white paper is EPDM or chloroprene rubber; The ash is black, and natural rubber has a sticky feel when touched by hand at the extinguished area.

B. Thermoplastic elastic strips can be pulled into filaments at the extinguishing point after combustion, and EVA (ethylene vinyl acetate copolymer) has a distinct vinegar taste. PE (polyethylene) and PP (polypropylene) have a distinct smell of candle burning. Dao, sustainable combustion, accompanied by low melting point. PVC (polyvinyl chloride) adhesive strips have the characteristic of extinguishing immediately upon ignition, and are accompanied by black smoke and irritating odors.

C. TPV thermoplastic vulcanized rubber: surface matte, with melt drawing phenomenon, floating on the water surface or suspended in water.

D. SEBS thermoplastic elastomer sealing strip: The surface is matte, with a melting and drawing phenomenon, and slowly sinks in water.

2. Tensile force measurement

Relatively speaking, as a sealing strip material, it should have a certain tensile strength, and the standard requirement is that the strength should not be less than 5Mpa. The higher the adhesive content of the same material, the better the drawing, and generally the longer the lifespan. Sealing strips will be better.

3. Smell the odor

Smell with your nose to see if there is any odor. Normal PVC material has a certain mellow smell, and you can hardly smell any odor,

4. Wrap the sealing strip tightly around the profile as much as possible and leave it at high temperature for a period of time (on the roof or in a sunny place). Check whether the contact surface between the profile surface and the sealing strip is stained or discolored, whether the dust on the surface of the sealing strip turns yellow, and whether there is oil leakage

Are your hands dirty.

Some cheap sealing strips have a lot of fillers, so the surface will not be very smooth. Those cheap sealing strips with dull appearance are not advisable.

The sealing performance of doors and windows is closely related to the sealing strip. Do you understand after reading these? How to choose sealing strips? Let's take a look at our products. Linqu Ruixing Plastic always maintains close contact with customers and is committed to providing them with more professional, effective, and high-quality technical service support, as well as system solutions.