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       Industrial Filter Cloth At this exhibition, many manufacturers can produce industrial filter cloth, but most only mention or display a few samples in the printed and distributed materials, without indicating the corresponding use and characteristics. Due to the fact that international and domestic famous brand manufacturers producing filter cloths have not participated in the exhibition, the overall development of filter cloths cannot be reflected in this exhibition, but there are also some features worth introducing. The new development of domestic products is mainly air purification and oil water separation. Polypropylene microfiber filter cloths can be used not only as high efficiency, sub efficiency, medium efficiency air filter materials, but also as filter components for production, Polypropylene absorbent felt is mainly used for oil removal operations on water surfaces such as the sea and harbors. It is a material used to purify water surfaces and rescue oil spills from oil tankers.

       Nylon microfiber battery separators are used for cadmium nickel batteries and aluminum lead batteries, mainly manifested in:

① Adopt new fiber raw materials to improve the level of filter materials;

② Different varieties correspond to different uses;

③ Explain the key indicators clearly and briefly explain the principles.

       Industrial filter cloth has the characteristics of polypropylene fiber, acid resistance, alkali resistance, light specific gravity, melting point 142-146 ℃, and normal use temperature<90 ℃. The product is mainly used in supporting equipment such as plate and frame filter presses, belt filters, folding belt filters, disk filters, and drum filters for solid-liquid separation with strong alkalinity in fine chemical industry, dye chemical industry, other chemical industries, sugar making, pharmaceutical, aluminum oxide, and other industries, The filtering accuracy Z of the product can be less than 1 micron. Industrial filter cloth manufacturers find it easy to confuse the filtration accuracy with the unit weight of the filter cloth itself. Under the same process conditions and materials, this is a material production performance index of a material manufacturer, which has no direct significance for users.

       Because this parameter reflects the total elongation of the material during exercise, and users use it without fracture conditions during use. Unit weight is positively correlated with filtration accuracy. However, it is not an absolute single correlation. The mechanical strength of the filter cloth is better than trial use, as the strength increases, resulting in deterioration of parameters such as cost and uniformity, and may not be very suitable. Therefore, users can measure their strength requirements under their own operating conditions. It is necessary to confirm the operating conditions, including the solid-liquid composition of the filter object, the filter pressure difference, the temperature of the filter liquid, the filtering amount per unit time, the principle of using the filter equipment, and the mechanical strength requirements for the filter cloth; In other words, if the process conditions are changed, even for the same unit area, the results will be different in filtration accuracy. Determine what filter material is currently used on the filter device.

       For example, whether there is a uniform rolling point, what is the thickness, what is the unit weight, and what problems exist in the use of industrial filter cloth. The main components of industrial filter cloth are polypropylene short fibers, short fibers, and spun yarn, ribbon, and wool; Polypropylene staple fiber has a long fiber length and smooth yarn. Therefore, industrial fabrics made of polypropylene staple fiber are better than long fibers in terms of surface fuzzing, powder filtration, and pressure filtration. Industrial fabrics made from polypropylene long fibers have a smooth surface and good breathability. Another indicator is flux. Generally, filter cloth suppliers do not directly provide the measured flux based on the specific customer's filtration liquid, and usually use permeability as a reference.

       However, the permeability of industrial filter cloth is a parameter with a very wide range of changes. Even under strict experimental conditions, when the same sample is tested multiple times under the same test equipment, there will be significant differences in data activity between the two. Generally, the tensile mechanical strength index of filter cloth is measured in N/5CM, so the total tensile strength in a certain direction over the width of use can be calculated linearly. It is appropriate for the total tensile strength of industrial filter cloth to exceed 15-20% of the mechanical stress in the direction Z in use. It is more likely that for some special liquids, due to their incompatibility with the material itself, air permeability and liquid impermeability often occur.

       The filtration accuracy of industrial filter cloth is a relatively accurate concept, while the pore size distribution of filter paper is a relatively random distribution. To determine the accuracy, industrial filter cloth is usually measured by the relevant pore size test provided by the filter cloth supplier. Then, it is determined based on its own operating conditions. Of course, air permeability is somewhat related to flux. Similar to the relationship between unit weight and accuracy, industrial filter cloth can predict flux through air permeability under certain conditions. Therefore, users can accumulate experience based on their own usage to obtain this relevant relationship. In summary, the air permeability of industrial filter cloth is a reference parameter.