Waterproof breathable membrane technology was first introduced from Europe and the United States began, however, domestic production of a wide variety of products, all manufacturers of products of variable quality, did not form a unified quality standards. In fact, waterproof breathable membrane has three layers: PP spun-bonded non-woven cloth, PE polymer permeability membrane, PP spun-bonded non-woven fabric. Spun-bonded non-woven fabric's main function is to increase tension and hydrostatic pressure and protect the middle-tier (breathable membrane) real breathable PE polymers breathable film depends mainly on the middle tier.
Waterproof breathable membrane prices of the main raw material, production, equipment investment cost. Currently there are some manufacturers distribute said waterproof breathable membrane is auxiliary, low cost, low price, no higher than the thermal insulation material such as cotton. This is nonsense. This is purely to entrap consumers, mislead consumers. Because those manufacturers do not have waterproof breathable membrane production technology, they used rudimentary coated nonwoven hot-melt glue or spray adhesive compound adhesive-bonded cloth equipment, production of fake waterproof breathable membrane, fallacy to mislead consumers, to achieve ulterior purposes.