The fire retardant sealing strip is mainly used between the door leaf and the door frame, and between the door leaf and the door leaf of steel doors and wooden doors. In case of fire, the fire expansion sealing strip will automatically expand, seal the door gap, block the air flow between the two spaces, effectively prevent the harm of smoke, toxic gas and hot gas to human body in the early stage of fire and control the spread of fire.

Expansion temperature: initial expansion temperature 199 ℃, main expansion temperature 347 ℃;

Linear expansion ratio: greater than or equal to 10 times the thickness of the original expansion body;

High temperature resistance and combustion performance: temperature rise to 980 ℃ and keep for 90 min, without burning and ashing;

Smoke prevention performance: the fire resistance test is carried out for 90 minutes, and there is no obvious smoke leakage at the left, right and upper gaps of the door installation seal, and the smoke prevention performance is greater than 90 minutes

Environmental resistance: the expansion ratio remains unchanged at room temperature and 90 humidity.

General dimensions: 2mm * 20mm, 2mm * 15mm, 2mm * 10mm, 4mm * 20mm, 4mm * 15mm, 4mm * 10mm (can be specified with the customer).