Steel high rate expansion strip series products are developed with the latest international technology, with high expansion, good heat insulation and other characteristics, in case of fire, heat can be rapidly expanded to 15 times more than 50 times the original volume, can completely fill the fire window cavity, maintain the integrity of the fire window, so as to form a strong fire barrier, instantly create an independent safety space, to ensure the human body Security.

Speaking of fireproof expansion strips, I believe that friends who have installed doors and Windows are very clear that there will be some gaps after the installation of doors and Windows. In order to make doors and Windows more soundproof and sealed, fireproof expansion strips will be used to seal them. How to choose? There are several ways to identify its quality.

1. Sun method:

The seals on the market are made of polyvinyl chloride and silicone rubber. The surface of PVC material is dull, feel stiff, no elasticity, although the price of silicone rubber material is slightly higher, but feel soft, elastic. Besides, if it is exposed to sunlight, it will not change anything.

2. Cold shrinkage test method

Both materials can be frozen in the refrigerator for a period of time. When removed, you can see that the PVC seal becomes stiff and breaks when folded. But the silicone seal did not change. Therefore, it is recommended to choose silicone rubber sealing strip, which is not affected by hot and cold environment and has buffer effect, and can protect doors and Windows well.

3, open flame combustion test method:

Burning the seal made of these two materials, PVC burning will emit black smoke and will bubble and shrink, have a pungent smell. The hard plastic, meanwhile, will remain and will not burn completely. However, silicone rubber is very environmentally friendly, smokeless and tasteless when burning and can be completely burned into a white powder.