Conventional industrial low-temperature monofilament filter fabric materials mainly include nylon, polyester, polypropylene, and polyethylene, etc. The above single filament filter fabric products have been widely used in pharmaceuticals, food, fine chemicals, metallurgy, mineral processing, and many other industries.
Polyester monofilament fibers have many excellent properties, including impact resistance, strength 4 times that of nylon, and strength up to 8.0cN/dtex; low moisture absorption, wet strength slightly lower than dry strength; good wear resistance, second only to the best wear resistance of nylon; good corrosion resistance, can withstand bleach , Oxidants, and hydrocarbons, and have strong acid and alkali resistance; in addition, they also have good elastic recovery and UV resistance.
The single-filament filter fabric made of polyester has outstanding filtration performance. The filter fabric has good wear resistance, high strength, and a smooth surface of the monofilament, thus good breathable and water permeability, fast filtration speed, high efficiency, and easy cleaning.
Due to the high initial shrinkage of polyester fibers, the texture of the filter fabric can be finer, so polyester has superior particle retention.
Currently, polyester monofilament filter fabric wholesale is mainly used in separation engineering in industries such as papermaking, fine chemicals, metallurgy, and sewage treatment.
Nylon has high strength in both dry and wet states, with a strength of up to 5.3cN/dtex in dry state and 80%-90% of dry strength in wet state. Its wear resistance is more than 10 times that of cotton fibers. Nylon has good elongation and elasticity, with an elongation rate of 18%-45%, and elastic recovery rate of over 90% at 10% elongation. It has good alkali resistance and resistance to other chemicals, is relatively stable in other solvents, but slightly less resistant to acid. The fiber surface is smooth and has strong moisture absorption, making it easy to unload the cake. The service temperature can reach 120℃, making it an ideal material for filter fabric.
However, it also has some problems, such as high water absorption, which may affect the stability of the filter fabric size, limiting its application and development in the fine solid-liquid separation industry.
Polypropylene fibers have good chemical resistance, wear resistance, dirt resistance, and resilience, as well as high strength, toughness, and light weight.
The highest service temperature of polypropylene fibers can reach 140℃-160℃, which can fully meet the requirements of conventional filter fabric. The filter fabric woven from polypropylene monofilament fibers inherits the excellent physical and chemical properties of polypropylene fibers, has good resistance to acids and alkalis, a smooth and straight surface, almost no moisture absorption (below 0.3%), and a stable size of the woven fabric. It has good water permeability, can be used repeatedly, and can prolong the service life of the filter fabric, further reducing the use cost.
Based on the advantages mentioned above, polypropylene monofilament filter fabric has become one of the preferred filter fabrics for conventional filtration of high-temperature, acidic, and alkaline materials.
Compared to the three types of monofilament fiber filter fabrics mentioned above, polyethylene monofilament fiber filter fabric is relatively new, especially ultra-high molecular weight polyethylene monofilament fiber filter fabric, which shows stronger wear resistance, acid and alkali resistance, impact resistance, and longer service life.
In addition, the surface performance of ultra-high molecular weight polyethylene monofilament fiber filter fabric is particularly outstanding (smooth surface, non-adhesion, anti-scaling), with good toughness and fatigue resistance, long service life, and suitable for industrial production.
Currently, this filter fabric has been widely used in fields such as non-ferrous metal mineral processing, urban water pollution comprehensive treatment, power plant desulfurization and denitrification, papermaking, fine chemicals, etc., with excellent performance. The physical and chemical properties and filtration performance of filter fabric are closely related to the fiber materials that make up the filter fabric.