How does the fiber strength of Acrylic Needle Punched Filter Felt affect its service life?

1. Definition and test method of fiber strength
Fiber strength refers to the stress that a fiber can withstand during stretching, usually expressed in centinewtons per decitex. For Acrylic Needle Punched Filter Felt, fiber strength is one of the important indicators to measure its physical properties. When testing fiber strength, a representative fiber sample is usually extracted from the filter material and a universal material testing machine is used to perform a tensile test until the fiber breaks.

2. The mechanism of the effect of fiber strength on the service life of the filter material
Enhance the overall strength of the filter material: The higher the fiber strength, the greater the overall strength of the filter material. This means that the filter material is less likely to break when subjected to external forces, such as flue gas scouring, pulse cleaning, etc. Therefore, Acrylic Needle Punched Filter Felt with high fiber strength has a longer service life.
Improve wear resistance: In the process of industrial dust removal, the filter material needs to contact and rub with particulate matter for a long time. Fibers with high fiber strength can better resist this wear and tear, thereby extending the service life of the filter material. Especially for flue gas containing hard particles, filter media with high fiber strength can better show its advantage of wear resistance.
Maintain dimensional stability: Fiber strength not only affects the tensile properties of the filter media, but is also closely related to its dimensional stability. Fibers with high fiber strength are not easily deformed when heated or stressed, which helps to maintain the dimensional stability of the filter media. This is essential to ensure filtration efficiency and extend service life.
3. Relationship between fiber strength and other properties of filter media
Relationship with chemical stability: Although fiber strength mainly affects the physical properties of the filter media, it also has a certain correlation with chemical stability. Fibers with high fiber strength usually have better chemical corrosion resistance because they can better maintain structural integrity under chemical erosion. However, this does not mean that the higher the fiber strength, the better the chemical stability. Because chemical stability mainly depends on the chemical composition and surface treatment process of the fiber.
Relationship with thermal stability: Fiber strength also has a certain effect on the thermal stability of the filter media. In a high temperature environment, filter media with higher fiber strength are more resistant to thermal shrinkage and deformation, thereby maintaining stable filtration efficiency. But similarly, thermal stability is also affected by factors such as the pyrolysis temperature of the fiber, the thermal conductivity, and the overall structural design of the filter material.
4. Methods and processes for improving fiber strength
In order to improve the fiber strength of Acrylic Needle Punched Filter Felt, the following methods can be adopted:

Optimizing fiber raw materials: Selecting high-strength, high-modulus acrylic fibers as raw materials is the fundamental way to improve the fiber strength of the filter material. By improving the polymerization process and spinning conditions of the fiber, fibers with higher strength can be obtained.
Improving the needle punching process: Process parameters such as needle punching density, needle punching depth, and needle punching frequency have a significant effect on the fiber strength of the filter material. By optimizing these parameters, the bonding force between fibers and the overall strength of the filter material can be improved.
Post-treatment process: Post-treatment processes such as heat setting and singeing can also help improve the fiber strength of the filter material. Heat setting can eliminate the internal stress of the fiber, improve the heat resistance and dimensional stability of the fiber; singeing can remove burrs and impurities on the fiber surface and improve the contact and bonding between fibers.