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What are the applications of waterproof breathable membrane


The material of the waterproof breathable membrane is generally e-PTFE, which is a membrane produced by a special process of polytetrafluoroethylene. The waterproof breathable membrane is mainly embodied in waterproof breathable, dustproof breathable and bacterial breathable prevention, and is widely used in the fields of automobile, medical treatment, environmental monitoring, packaging, electronic sensor element protection and so on. Sandeli Precision Waterproof and Breathable Membrane is mainly used for waterproof and breathable electronic products. It is called "breathable material" in foreign countries.

waterproof breathable membrane

The waterproof and breathable membrane is mainly composed of microfiltration membrane, and the pore size is between 0.1-10μm. For waterproof and breathable membranes, water inlet pressure and air permeability are two very important values. Under normal circumstances, the two are competing relationships, and high air flow means low water inlet pressure. Waterproof and breathable membranes are mainly divided into hydrophobic membranes and oleophobic membranes, and in general, oleophobic membranes are used.

Because ePTFE has a certain natural hydrophobicity and oleophobicity, sometimes it will be wetted and penetrated when it encounters some liquids such as alcohols, cleaning agents, and lubricants with low surface energy. The oleophobic film has a lower surface energy and can resist the infiltration of these liquids.

Under normal circumstances, many devices and their applications require a relatively closed sealed environment, which cannot be affected by external dust, water, and bacteria. If it is designed to be specially blocked, under the objective premise of changes in ambient temperature and latitude, it will cause pressure changes inside the equipment. Usually, such pressure changes will produce a certain accumulation effect, which will destroy the equipment shell and internal sensitive components. The use of ePTFE waterproof and breathable membrane can continuously balance the pressure difference of the equipment, reduce the cost of component design, and ensure the reliability and reliability of the product.

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