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Needle-punched non-woven fabric processing procedures and processing principles

Needle-punched non-woven fabric is a kind of dry-laid non-woven fabric. It is to open, card and spread short fibers into a fiber web, and then the fiber web is reinforced into a cloth with a needle. The needle has barbs, and the fiber web is repeatedly pierced , Hook belt fiber reinforcement, forming a needle punched non-woven fabric, non-woven fabric has no warp and weft, the fabric fiber is messy, and the radial weft performance is not much different. Typical products: synthetic leather base cloth, needle-punched geotextile, etc.

Needle-punched non-woven fabric processing program
It is made of polyester and polypropylene raw materials, after 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. After heat setting and singeing, the surface is treated with a chemical oil agent to make the filter cloth The surface is smooth, and the micropores are evenly distributed. From the surface, the product has good density, smooth and air-permeable surfaces on both sides. It is proved that the filter on the plate and frame compressor can use high-strength pressure and the filtration accuracy is up to 4 microns. Need to provide polypropylene and polyester two kinds of raw materials. 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 the filter cloth of other specifications is used, the filter cake will not be dry and difficult to fall off. After using the non-woven filter cloth, the filter cake is quite dry when the filter pressure reaches 10kg-12kg, and the filter cake is opened when the filter is framed. It will fall off automatically. When users choose non-woven filter cloth, they mainly consider non-woven filter cloths of different thickness and quality according to air permeability, filtration accuracy, elongation, etc. Please click polyester needled felt and polypropylene needled felt for product parameters. The 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, including: geotextile, geomembrane, velvet, speaker blanket, electric blanket cotton, embroidered cotton, clothing cotton, Christmas Crafts, artificial leather base cloth, special cloth for filter material.

Processing principle of needle punched non-woven fabric
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 fiber web to obtain a strong force. The basic principle is:

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 interior of 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 needling, 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.

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