Introduction to barrier film

Polypropylene films of spunbond polyethylene and polypropylene films generally refer to biaxially oriented polypropylene films. Biaxially oriented polypropylene films (BOPP) are usually multilayer pneumatic films. After polypropylene particles are pneumatically formed into sheets, they pass through two directions. The stretched film has excellent physical stability and mechanical strength because of the stretched molecular direction.

How to use the breathing paper?

Breathing paper ensures the thermal insulation performance of the building, improves the air quality of the room, and makes the living environment more warm. The waterproof vapor barrier film must have good air tightness. It can help prevent airflow intrusion, reduce energy consumption, and prevent moisture from overflowing the wall.

How is the waterproof vapor barrier film waterproof?

The working principle of the waterproof vapor barrier membrane can be divided into two types: microporous and hydrophilic groups. The waterproof and breathable membrane adopts the former, because the minimum diameter of water droplets is about 20 microns, while the diameter of water vapor molecules is only about 0.0004 microns. , There is a huge difference between the diameters of the two, water vapor can pass through the microporous membrane by the principle of diffusion, and liquid water or water droplets are due to the effect of surface tension.

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Development history of waterproof and breathable membrane

In the 1950s, German architects found that the self-adhesive and airtight characteristics of asphalt waterproofing membrane and coating waterproofing materials led to the residual water in the concrete structure being enclosed in the structure, and the water vapor in the concrete structure could not be released, which led to the breeding of mold on the roof and wall, and the indoor air quality and human health were seriously threatened. Therefore, the German construction industry began to use the roof cushion with air permeability to replace the self-adhesive coiled material and film waterproof. This air permeability cushion is laid on the roof base layer, so that the water vapor of the cast-in-situ concrete roof panel can be quickly discharged, thus avoiding the breeding of mold.

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What are the advantages of laying waterproof and breathable membrane on sloping roof?

The waterproof and vapor permeable membrane on the sloping roof not only strengthens the water tightness of the building, but also makes the water vapor of the structure discharge rapidly, protects the thermal performance of the enclosure structure, avoids the breeding of mold on the roof, and improves the air quality of the room.

What are the relevant raw materials of the reflective waterproof breathable membrane?

Reflective waterproof and breathable membrane construction The working principle of waterproof and breathable membrane can be divided into two types: micropore and hydrophilic group. It is only about 0.0004 microns, and there is a huge difference in the diameters of the two. Water vapor can pass through the microporous membrane by the dispersion principle, and liquid water or water droplets are due to the effect of surface tension.

What type of insulation is fireproof?

Fireproof insulation materials come in five primary forms. These include chopped fibers, foam, fibrous mats and textiles, board or block insulation, films and foils. The fire resistance of each form depends largely on the material of which it is composed.

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