Can waterproof breathable membranes block liquids?

Waterproof and breathable membrane is a kind of film material processed by special technology, which can have both waterproof and breathable functions. It is mainly composed of polyurethane, polyester fiber and other materials. It has a loose structure and many micropores inside, allowing moisture to be discharged through the micropores of the breathable membrane while blocking the penetration of external moisture. Waterproof and breathable membranes are widely used in construction, textile, pharmaceutical, petrochemical and other industries.

The waterproof performance of the waterproof breathable membrane can have a very good waterproof effect. Because the breathable membrane has a microporous structure, moisture can be discharged through the micropores, but the diameter of the micropores can block the penetration of most water droplets. Through the waterproof performance of the breathable membrane, building structures, textiles, medicines, etc. can be effectively protected from moisture erosion.
However, although the waterproof breathable membrane has certain waterproof properties, under certain conditions, it may not be able to completely block the penetration of liquids. First, if the pressure of the liquid exceeds the barrier capacity of the breathable membrane, the liquid may still pass through the membrane. Secondly, the waterproof performance of the breathable membrane is also affected by the structure and material of the membrane. Some materials may have better waterproof performance, while some materials have relatively poor performance.

In addition, the waterproofing effects of waterproof and breathable membranes vary in different application scenarios. For common building waterproofing, waterproof and breathable membranes can usually prevent the penetration of external moisture, thereby protecting the interior of the building from water corrosion. However, in some special environments, such as extreme climate conditions, the waterproof performance of the breathable membrane may be affected. In this case, additional waterproofing measures may be required to increase water resistance.

Generally speaking, waterproof and breathable membranes can block the penetration of liquids and achieve a certain waterproof effect. Its waterproofing properties are affected by the choice of materials and the structural design of the membrane. In practical applications, better waterproofing effects can be achieved by selecting appropriate materials and membrane structures according to specific needs and taking other waterproofing measures.