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The Production Process and Principle of Needle Punch Nonwoven Fabrics

The Production Process and Principle of Needle Punch Nonwoven Fabrics

Speaking of non-woven fabrics, many friends know that this is a kind of fabric that is composed of fibers and has the same properties as cloth, but it has some characteristics that real cloth does not have. The material of this planonwoven is composed of polypropylene.

Moreover, it has a series of characteristics that real cloth does not have, such as moisture-proof, difficult to tear, etc. So today buchong will introduce how to make this kind of planonwoven. One of the method is knitting, which is to hook the non-woven material with a needle.

1. Process flow of needle punch nonwoven fabrics

1) Needle punch nonwoven fabrics are made of polyester and polypropylene as raw materials, with rough combing, combing, pre acupuncture and main acupuncture. A mesh interlayer is added in the center, and then it is combed by double-pass, air-laid and needle-punched to form a cloth. After the filter press has a three-dimensional structure, it is heat-set.

2) After singeing, the surface is most treated with chemical oil, so that the surface of the needle punch nonwoven fabric is smooth and the micropores are evenly distributed. The density of the product is good from the surface, and the surfaces on both sides are smooth and air-permeable.

It has been proved by the filter on the plate and frame compressor, which can use high pressure, and the filtration accuracy is up to 4 microns. Two kinds of raw materials, polypropylene and polyester, can be provided according to user needs.

Practice has proved that non-woven filter cloth has better performance in plate and frame filter press. If other specifications of filter cloth are used, the filter cake will not be pressed dry, and it will be difficult to fall off. After using planonwoven fabric, the filter cake is quite dry when the filter pressure reaches 10kg-12kg.

When the filter frame is opened, the filter cake will fall off automatically. When selecting planonwoven fabrics, users should consider planonwoven fabrics of different thickness and quality according to air permeability, filtration accuracy, elongation, etc. For product parameters, please click polyester needled felt and polypropylene needled felt, and specifications and varieties can be formulated.

Needle punch nonwoven products are formed by fine carding, repeated precision needle punching or appropriate hot rolling treatment. On the basis of high-precision needle-punched production lines, high-quality fibers are selected for needle punch nonwoven fabrics. Through the coordination of different production processes and the matching of different materials, hundreds of different products are currently circulating on the market.

Among them are: geotextile, geomembrane, velvet cloth, speaker blanket, electric blanket cotton, embroidery cotton, clothing cotton, Christmas crafts, artificial leather base cloth, special cloth for filter materials.

Processing principle the production of planonwoven fabrics by needling method is completely through a mechanical action, that is, the needling action of the needling machine, strengthening and wrapping the fluffy fiber mesh to obtain strong strength.

2. The basic principle of needle punch nonwoven fabrics

The web is repeatedly punctured with barbed barbs on the edges of a triangular section (or other section). As the barbs pass through the web, the surface and local inner fibers of the web are forced into the interior of the web.

Due to the friction between the fibers, the originally fluffy web is compressed. When the needles exit the web, the pierced fiber bundles break away from the barbs and remain in the web, so that many fiber bundles are entangled in the web and can no longer be restored to its original fluffy state.

After many times of needling, a considerable number of fiber bundles are stabbed into the fiber web, so that the fibers in the fiber web are entangled with each other, thereby forming a needle punch nonwoven fabric with certain strength and thickness.