In terms of production technology, the technical and quality requirements of waterproof and breathable membranes are much higher than those of general waterproof materials; at the same time, from the perspective of quality, waterproof and breathable membranes also have features and performances that other waterproof materials do not have.
The special fiber structure of the waterproof and breathable membrane prevents the erosion of the building structure by wind and rain. While enhancing the air and water tightness of the building, its unique breathability can quickly discharge water vapor inside the enclosure structure, effectively avoiding the formation of mold and condensation on the structure, protecting the thermal performance of the envelope structure, so as to save energy and improve the durability of the building. Waterproof and breathable membrane is to maintain the human living environment, and perfectly solve the waterproof, moisture-proof and breathable performance of the building, and improve the health of human living. It is people-oriented and is a new type of healthy and environmentally friendly energy-saving waterproof material. Waterproof and breathable membranes are used in residential buildings and public buildings. The construction of waterproof and breathable membranes is known as the "breathing house".
The waterproof and breathable membrane is mainly composed of three layers of materials: high-density spunbond polyethylene non-woven fabric + polymer breathable membrane + high-density spunbonded polyethylene non-woven fabric through hot pressing. The main function of the high-density spunbond polyethylene non-woven fabric in the waterproof and breathable membrane is to enhance the tensile bearing capacity and static water pressure of the waterproof and breathable membrane and to protect the middle layer (polymer breathable membrane). The real breathability of the waterproof and breathable membrane is mainly based on the interlayer polymer breathable membrane.