Non woven fiber felt, also known as non-woven fabric, needle punched cotton, needle punched non-woven fabric, etc., is made of polyester fibers and polyester fibers. They are made through needle punching technology and can be made into different thicknesses, textures, and textures. Non woven fiber felt has the characteristics of moisture resistance, breathability, softness, lightweight, flame retardancy, low cost, and recyclability. Can be used in different industries, such as sound insulation, thermal insulation, electric heating film, masks, clothing, medical, filling materials, etc. Here is an introduction to the surface treatment method of non-woven fiber felt.
Processed non-woven fiber felt, especially needle punched fabric, will have many protruding fluff on the surface, which is not conducive to dust falling. The surface of fiber filter material. Therefore, non-woven fiber felt needs surface treatment. The purpose of surface treatment of felt filter bag non-woven filter material is to improve filtration efficiency and dust removal effect. Enhance heat resistance, acid and alkali resistance, and corrosion resistance; Reduce filter resistance and extend service life. There are many surface treatment methods for non-woven fiber felt, but they can usually be divided into physical or chemical methods. In physical methods, the commonly used method is heat treatment. Let’s take a brief look below.
Surface treatment method of non woven fiber felt
Burnt hair
Burning wool will burn off the fibers on the surface of non-woven fiber felt, which helps to clean the filter material. The fuel burned is gasoline. If the singeing process is not properly controlled, the surface of the filter material may melt unevenly, which is not conducive to dust filtration. Therefore, the singeing process is rarely used.
Heat setting
The function of heat setting non-woven fiber felt in the dryer is to eliminate residual stress during the processing of the felt and prevent deformation such as shrinkage and bending of the filter material during use.
Hot pressing
Hot rolling is a commonly used surface treatment method for non-woven fiber felt. By hot rolling, the surface of non-woven fiber felt is made smooth, flat, and uniform in thickness. Hot rolling mills can be roughly divided into two roll, three roll, and four roll types.
Coating
Coating treatment can change the appearance, feel, and intrinsic quality of non-woven fiber felt on one, both sides, or as a whole.
Hydrophobic treatment
Generally speaking, non-woven fiber felt has poor hydrophobicity. When condensation occurs inside the dust collector, it is necessary to increase the hydrophobicity of the felt to prevent dust from adhering to the surface of the filter material. The commonly used hydrophobic agents are paraffin lotion, silicone and aluminum salt of long-chain fatty acid.
What is the difference between non-woven felt and felt cloth
Different material compositions
The raw materials of non-woven felt are mainly fibrous substances, such as short fibers, long fibers, wood pulp fibers, etc., which are made through processes such as wetting, expansion, molding, and curing, and have the characteristics of softness, lightness, and breathability.
Felt fabric is made from textile raw materials, mainly a mixture of pure wool, polyester wool, synthetic fibers, and other fibers. It is made through processes such as carding, bonding, and carbonization. The characteristics of felt fabric are thick, soft, and elastic.
Different production processes
Non woven felt is a thin sheet material made through processes such as wetting, swelling, forming, and curing, while felt cloth is a textile made through processes such as carding, bonding, and carbonization. The production processes of the two are different, so there are also some differences in physical and chemical properties.
Different uses
Non woven felt is mainly used in industries for filtration, sound insulation, shock resistance, filling, and other fields. For example, non-woven felt can be made into various filter materials, oil absorbing pads, automotive interior materials, etc.
Liansheng Non woven Technology Co., Ltd. was established in May 2020. It is a large-scale non-woven fabric production enterprise integrating research and development, production, and sales. It can produce various colors of PP spunbond non-woven fabrics with a width of less than 3.2 meters from 9 grams to 300 grams.
Post time: Sep-11-2024