Do You Know the Role of Nylon Mesh in Building Ventilation Systems?

The main function of the waterproof steam veneer is to delay the speed of water vapor passing through the roof or wall assembly.

Nylon mesh filter ribbons supplier believes that there is no true waterproof vapor barrier that can completely prevent the passage of water vapor, but some waterproof vapor barriers are less permeable because of their lower permeability. Other veneers delay the penetration process even more. Permeability is measured in imperial perms (1 perms means 1 centimeter of water passes through an area of 1 square foot in 1 hour at a pressure difference of 1 inch of mercury) or nanometers per metric meter per pascal per square meter Centimeters to 1/7000 pounds). 1 perm is equal to 57.2 nanograms per square tear card per second per square meter. The velocity of the water vapor is equal to the water vapor pressure difference between the materials on both sides multiplied by the permeability of the waterproof veneer. The lower the permeability, the better the effect of the waterproof veneer. According to the North American Insulation Materials Manufacturers Association (NAIMA), the perm number of commonly used waterproof veneers ranges from 1.0 to 0.02, where 1.0 is used for basic nylon waterproof veneers and 0.02 is used for high-grade composite materials (such as aluminum foil Mesh fiber / kraft paper, metallized polypropylene / mesh fiber / kraft paper, nylon / mesh fiber / aluminum foil, polypropylene / mesh fiber / aluminum foil, and nylon / mesh fiber / metalized polyester, etc.). In order to choose a suitable veneering material, it is necessary to estimate the amount of water vapor that may be generated in the building and compare it with the amount of water vapor generated under local annual temperature and humidity conditions. Then, you need to consider factors such as appearance, tear resistance, and cost. Some occupants may have additional requirements for water-resistant vapor-laminated surfaces, such as reducing noise or having low heat emissivity. In chemical plants, laboratories, poultry farms, steel mills and other places that release chemical fumes, special chemical analysis is required. The owner is advised to consult the manufacturer when applying in critical locations. Among the leaders in the manufacture of waterproof veneers are Lamtec of Flanders, NJ; Vytech Industries of Anderson, South Carolina; and Madison of Nebraska Thermal Design, Inc. and Rexam Performance Products, Stamford, Connecticut. White materials are popular because of their high reflectivity needed for ceilings. The main advantage of some tear-resistant insulation cotton veneers, such as Lamtec's products, is their toughness. These products are designed to compete with interior wall boards and gypsum boards. Pure nylon veneers were used without exception in the early days, but their use is declining. Although its cost is low, it has higher permeability, lower penetration resistance, and tends to age and crack and yellow. The performance of any new material in these areas is much better than it is. If price is the only criterion, non-metallized polypropylene / mesh / kraft veneer is often a substitute for nylon veneer and it is the cheapest reinforced veneer available. However, its high permeability (about 0.09 perm) is 4.5 times higher than that of the medium-priced metal veneers. It is worth noting that the difference between the cheapest veneer and the most expensive veneer is very small, only about 0.2% of the total construction cost.

Filtration Nylon Mesh

Although the use of filtration nylon mesh in buildings has become lower, its main filtering function cannot be denied.

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