The PTFE coated filter material waterproof and breathable membrane mainly consists of three layers: PP spunbond non-woven fabric, PE polymer breathable membrane, and PP spunbond non-woven fabric.
The main function of spunbond non-woven fabrics is to enhance tensile force and hydrostatic pressure and protect the middle layer (breathable film). Real breathability mainly relies on the middle layer PE polymer breathable film.
In the state of water vapor, the water particles are very small. According to the principle of capillary movement, they can smoothly penetrate the capillary tube to the other side, thus causing breathability.
In terms of production technology, the technical requirements of waterproof and breathable membranes are much higher than those of ordinary waterproof materials. At the same time, from a quality perspective, PTFE-coated filter material waterproof and breathable membranes also have functionality that other waterproof materials do not have. Features.
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