Needle punched non-woven fabric production process and principle

The production process and principle of needle punched non-woven fabrics. Speaking of non-woven fabrics, many friends know that this is a kind of fabric composed of fibers and has the same properties as cloth, but it has some characteristics that real fabrics do not have. , That is, the material of this non-woven fabric is composed of polypropylene, and it is moisture-proof, difficult to tear, and a series of characteristics that real fabrics do not have. So today I will introduce how to make this non-woven fabric. One of the methods is the knitting method, which is to crochet this non-woven material with needles. Here is a detailed talk about the process and principle of needle punched non-woven fabric production. Process flow: The first step is that the needle punched non-woven fabric is made of polyester and polypropylene raw materials, through carding, combing, pre-needling, and main needling. The center is interlayered with mesh cloth, and then through double nucleation, air-laid and needle punched composite cloth, the post-press filter cloth has a three-dimensional structure and is heat-set. After the second step of singeing, the surface is treated with a chemical oil agent to make the surface of the filter cloth smooth and the micropores evenly distributed. From the surface, the product has a good density, and the surface of both sides is smooth and has good air permeability. The filter is proved to be able to use high-strength pressure, with a filtration accuracy of less than 4 microns, and can provide polypropylene and polyester two raw materials according to user needs. Practice has proved that non-woven filter cloth has better performance in plate and frame filter press: for example, slime treatment in coal preparation plants and wastewater treatment in iron and steel plants. In the brewery, printing and dyeing plant wastewater treatment. If you use other specifications of filter cloth, the filter cake will not be dry and difficult to fall off. After using non-woven filter cloth, the filter cake will be quite dry when the filter pressure reaches 10kg-12kg, and the filter cake will be opened when the filter is framed. It will fall off automatically. When users choose non-woven filter fabrics, they mainly consider non-woven filter fabrics of different thickness and quality according to air permeability, filtration accuracy, elongation, etc., product parameters, please click polyester needled felt and polypropylene needled felt, specifications and varieties are all Can be formulated. The series of needle punched non-woven fabrics are formed through fine carding, multiple precision needle punching or proper hot rolling. On the basis of introducing two high-precision acupuncture production lines at home and abroad, high-quality fibers are selected. Through the coordination of different production processes and the combination of different materials, hundreds of different products are currently circulating on the market. Among them are: geotextile, geomembrane, halberd flannel, speaker blanket, electric blanket cotton, embroidered cotton, clothing cotton, Christmas crafts, artificial leather base cloth, special cloth for filter materials. Processing principle The production of non-woven fabrics by acupuncture method is completely through a mechanical action, that is, the puncture action of the needle puncture machine, which reinforces the fluffy web to obtain a strong force. Basic principle: Use triangular cross-section (or other cross-section) edges with barbed thorns to repeatedly puncture the fiber web. When the barbs pass through the web, they force the surface and local inner fibers of the web to penetrate into the web. Due to the friction between the fibers, the original fluffy web is compressed. When the felting needle exits the fiber web, the pierced fiber bundles detach from the barbs and stay in the fiber web. In this way, many fiber bundles entangle the fiber web so that it can no longer restore the original fluffy state. After many times of needle punching, a considerable number of fiber bundles are pierced into the fiber web, making the fibers in the fiber web entangled with each other, thereby forming a needle punched non-woven material with a certain strength and thickness.