Building waterproof non-woven fabric

Waterproof non-woven fabrics for construction mainly have waterproof and breathable functions. Water impermeability and water vapor transmission are the test items for testing this function. For microporous non-woven fabrics, water impermeability and water vapor transmission are mutually restricted. The larger the pore size, the greater the water vapor transmission rate, and the lower the impermeability. Therefore, the high indicators of these two functional inspection items cannot be pursued blindly. The balance of these two inspection items can effectively waterproof and prevent condensation.

When condensation occurs due to the difference in temperature between cold and heat, water droplets will form on the roof or wall surface, and the water droplets will penetrate into the building or insulation layer, reducing the thermal efficiency of the insulation layer and affecting the durability of the building. The waterproof non-woven fabric is installed outside the insulation layer to ensure the effective discharge of water vapor in the enclosure system, solve the problem of condensation and moisture prevention, and protect the insulation layer. Preventing condensation is the most critical indicator of breathable membranes. Although excessive water vapor can reflect certain breathability, it cannot be directly determined whether the breathable membrane has the anti-condensation function. Therefore, according to the requirements of the use environment, a suitable application performance inspection method is developed to detect waterproof The anti-condensation function of non-woven fabric is very necessary.