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What are the technical characteristics of waterproof breathable membrane?

2023-10-17

The waterproof and breathable raw material used in the waterproof and breathable membrane is a new type of waterproof and breathable material widely used in the modern industry and electronic fields. The waterproof and breathable membrane has two basic functions of being waterproof and breathable. The waterproof and breathable membrane is mainly composed of three materials: PP spunbonded non-woven fabric, PE polymer breathable membrane, and PP spunbonded non-woven fabric. Production process of waterproof and breathable membrane: There are three main types of production and processing of waterproof and breathable membrane:

1. Waterproof and breathable film casting composite. This kind of processing technology is to rely on the viscosity of the plastic itself to compound after hot-melting plastic particles. In fact, this is a very common non-woven fabric coating. The disadvantage is that it is hardly breathable. There is no highly breathable waterproof breathable membrane produced by this process at present.

2. Glue spraying or squeegee compounding (hot melt adhesive compounding). 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 itself, this waterproof and breathable membrane can only be a shrunk version of the real waterproof and breathable membrane, and the glue will be released soon after being placed for a period of time.

3. Hot pressing complex. At present, there are already many manufacturers using this technology, and the application is becoming more and more mature, which has well realized the high air permeability, high temperature resistance, anti-aging and other 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 processing methods of waterproof and breathable membrane developed and gradually matured. The raw materials of waterproof and breathable membrane have Some other performances and advantages that some waterproof materials do not have. While the waterproof and breathable membrane is air-tight and water-tight, the waterproof and breathable membrane material has good air permeability, which can make the water vapor inside the electronic product or equipment discharge well. , so that the internal components of electronic products will not be damaged by liquids such as water, and at the same time, it can save costs or budgets to a certain extent, and solve the waterproof, breathable, and sound-permeable problems while also balancing the internal and external atmospheric pressure differences.

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