Waterproof breathable membrane(breathable paper) has a good waterproof, breathable, windproof and anti-aging characteristics, is widely used in the construction field. Waterproof breathable membrane (breathing paper) in time to strengthen the water tightness of the building, with its unique ventilation function, so that the smooth discharge of moisture within the enclosure, so as to effectively prolong the service life of the building, the heat preservation and energy saving, improving the living environment of the function. The unique breathing function of the product has become an important invention and innovation in the field of Chinese architectural applications. At the same time, waterproof, breathable membrane, waterproof, anti mite, mildew, antibacterial, breathable, isolation and other functions, is widely used in modern industry, agriculture, home textiles, clothing, medical, health, packaging and other fields. Waterproof breathable membrane is a new material necessary for protection and isolation.