How the microporous structure of waterproof and breathable membrane balances internal and external pressure

The microporous structure of the waterproof and breathable membrane can balance internal and external pressures, which mainly depends on the size and distribution of its micropores. The pore sizes of these micropores are much larger than gas molecules but much smaller than water droplets and dust particles. Therefore, gas can enter and exit freely, while water droplets and dust are effectively blocked.

When the external environmental pressure changes, gas can quickly enter and exit through the micropores of the waterproof and breathable membrane, thereby balancing the pressure difference between the inside and outside. This balancing process can prevent packaging deformation or rupture due to pressure changes and improve the product's pressure resistance and service life.

In addition, the microporous structure of the waterproof and breathable membrane can also effectively block water molecules and dirt particles and other substances, preventing them from entering the interior of the product, thereby keeping the product dry and clean. This dust-proof and waterproof property makes waterproof and breathable membranes widely used in many fields, such as electronic products, building materials, automobile parts, etc.