Needle - Punched Breathable Membrane for Construction

Technical Data

Material type: Polypropylene

Fabric construction: Non-woven

Weight: 65gsm or as your requirements

Tickness: 0.1mm or as your requirements

The differences between needle - punched breathable membranes and waterproof breathable membranes are as follows:

Manufacturing Process

• Needle - punched breathable membrane: It is mainly strengthened through the needle - punching process. First, the fibers are carded into a web, and then the web is repeatedly punctured by spiked needles, causing the fibers to entangle with each other to form a membrane - like material with certain strength and breathability.

• Waterproof breathable membrane: It has a variety of manufacturing processes. The common ones include forming microporous structures or hydrophilic groups in the membrane material through special polymer co - extrusion or coating processes to achieve waterproof and breathable functions. There are also multi - layer composite materials, which combine waterproof materials with breathable materials together.

Material Composition

• Needle - punched breathable membrane: Usually, synthetic fibers such as polypropylene and polyester are used as the main raw materials. These fibers have good physical properties, such as high strength and good wear resistance. After the needle - punching process, a stable breathable structure can be formed.

• Waterproof breathable membrane: Its composition is more complex. Some are based on high - molecular materials such as polytetrafluoroethylene (PTFE). It has extremely low surface energy and good chemical stability, which can effectively prevent water and be breathable. There are also some made of materials such as polyurethane and polyethylene through special treatment. The balance of waterproof and breathable properties is achieved by adjusting the formula and structure of the materials.

Performance Characteristics

• Needle - punched breathable membrane: It has good breathability and can meet certain air exchange requirements. It has high strength and can withstand certain tensile and compressive forces. However, its waterproof performance is relatively weak, and it can generally only resist mild water vapor or light rain.

• Waterproof breathable membrane: The focus is on having excellent waterproof and breathable properties at the same time. It can prevent the penetration of liquid water while allowing water vapor to pass through. It can adapt to various harsh weather conditions, effectively prevent the erosion of rain, snow, and other water on buildings or items, and at the same time maintain the circulation of internal air.

Application Scenarios

• Needle - punched breathable membrane: It is often used in occasions where the requirement for breathability is high and the requirement for waterproofing is relatively low. For example, the breathable layer of the building insulation layer can let the moisture in the insulation layer out, prevent the occurrence of condensation, and improve the insulation effect. In the agricultural field, it can be used as a covering material for greenhouse sheds, which helps to adjust the humidity and air circulation in the greenhouse.

• Waterproof breathable membrane: It is mainly applied in fields where both waterproof and breathable performance are strictly required. In the construction industry, it is widely used for waterproofing and moisture - proofing of roofs, exterior walls, basements, and other parts. It can effectively protect the building structure from water damage and at the same time ensure the freshness of indoor air. In the electronic equipment field, it is used for the shell sealing of electronic products such as mobile phones and computers to prevent water vapor from entering and damaging electronic components, and at the same time balance the internal and external air pressure.