Share The Main Role of Venting Membrane
Venting Membrane is an aPPlication in membrane separation. It uses a specially manufactured membrane with selective permeability to separate and filter the mixture under the action of external driving force. This kind of membrane has the property of allowing certain substaNCes to pass, but certain substances not. Since the kai in the 1960s, membrane separation technology has risen rapidly. At present, there are mainly PTFE, Nylon, PES, PVDF, PP, NC, MCE, PETE and other filtration membranes. Among them, PTFE has excellent chemical stability and natural hydrophobicity. Used in the field of ventilation.
breathable membranes are mainly embodied in waterproof and breathable, dust-proof and breathable, and bacteria-proof and breathable, and are widely used in automotive, medical, environmental monitoring, packaging, electronic sensor protection, and other fields. Waterproof and breathable membranes are mainly used for waterproof and breathable clothing. It is called "breathable material" abroad.
The breathable membrane is mainly a microfiltration membrane with a pore size of 0.1-10μm. For breathable membranes, there are two very important values for water inlet pressure and air permeability. Under normal circumstances, the two are in a competitive relationship, and high air permeability means low water inlet pressure. The breathable membrane mainly uses hydrophobic membrane and oleophobic membrane, and in most cases, oleophobic membrane is used. Although ePTFE has natural hydrophobic and oleophobic properties, it will be wetted and penetrated when it encounters some low surface energy alcohols, cleaning agents, lubricants, and other liquids. The oleophobic film has lower surface energy and can resist the infiltration of these liquids.
At present, ePTFE vent membranes are mainly used in automotive venting, medical venting, electronic sensor venting, packaging venting, and packaging venting including household packaging, agricultural packaging, and industrial packaging.
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