What are the processing and production processes of PE waterproof and breathable membrane?

There are three main production processes for waterproof and breathable membranes: 　　1, cast composite. This processing technology uses plastic particles to heat-melt and relies on the adhesive compound of the plastic itself. In fact, this is a very common type of non-woven film. The disadvantage is that it is hardly breathable. At present, no waterproof and breathable membrane with high air permeability has been produced by this process.　　2, spray glue or squeegee compound (hot melt glue compound). This process was initially applied to sanitary napkins, diapers, and protective clothing. At present, some manufacturers are still using this process to produce highly breathable waterproof and breathable materials. Since this glue is actually a pressure-sensitive adhesive, this waterproof and breathable membrane can only be a reduced version of a real waterproof and breathable membrane, and it will be opened soon after being placed for a period of time.　　3. Hot pressing compound. At present, there are many manufacturers adopting this process, and the application is becoming more and more mature. It has well realized the high air permeability, high temperature resistance, anti-aging properties of the waterproof and breathable membrane. The processing and production technology of waterproof and breathable membrane is mainly the above three processing methods. With the advancement of science and technology and the deepening of material research, there must be some new waterproof and breathable membrane processing methods developed and gradually mature. Some other waterproof materials do not have the performance and advantages. While the waterproof and breathable membrane has good air-tightness and water-tightness, the waterproof and breathable membrane material has good breathability performance, which can make the water vapor inside the electronic product or equipment discharge well, thereby The internal components of electronic products are not damaged due to liquids such as water, and at the same time, it can save costs or budget to a certain extent, and it can balance the atmospheric pressure difference between the inside and outside while solving the problem of waterproof, breathable, and sound transmission.　　 Label: pe waterproof bag