Needle punched nonwovens

Needle punched non-woven fabric belongs to a kind of non-woven fabric, which is made of polyester, polyester and polypropylene raw materials, after several times of needle punching and appropriate hot rolling treatment. According to different processes, with different materials, we can make tens of thousands of products, which are used in all walks of life. We can customize products of various specifications according to different uses.

Chinese name needle punched nonwovens alias polyester needle punched nonwovens common specifications gram weight: (100-1000) g / m2 Type Nonwovens dry Nonwovens

catalogue

1 Overview

2 common specifications

3 processing procedure

4 processing principle

5. Development characteristics

6 Relationship

7 differences

Overview editing voice

Needle punched nonwovens is one of the dry process nonwovens. It is to loosen, comb and lay the short fiber into a fiber net, and then reinforce the fiber net into a cloth through a needle. The needle has a hook and thorn. The fiber net is repeatedly punctured, and the hook and belt fiber is reinforced to form needle punched nonwovens. The nonwovens are not divided into warp and weft, and the fibers are disordered, with little difference in warp and weft properties. Typical products: synthetic leather base cloth, needle punched geotextile, etc.

Smart Fiber Needle Punched Nonwovens

Smart Fiber Needle Punched Nonwovens

Common specifications editing voice

Gram weight: (120-500) g / m2, thickness: ≥ 5mm, width: ≤ 240cm

Processing program editing voice

It is made of polyester and polypropylene raw materials, through carding, combing, pre needling, main needling. After heat setting and singeing, the surface of the filter cloth is treated with the most chemical oil agent, so that the filter cloth has smooth appearance and uniform distribution of micropores. From the surface, the product has good density, smooth surface on both sides and good air permeability, It can use high-strength pressure, and the filtration precision is up to 4 microns. It can provide polypropylene fiber and polyester fiber according to the needs of users. The practice has proved that the performance of non-woven filter cloth is better in plate and frame filter pressing: for example, coal slime treatment in coal preparation plant and wastewater treatment in iron and steel plant. In breweries, printing and dyeing wastewater treatment. If the filter cloth of other specifications is used, the filter cake will not be pressed dry and difficult to fall off. After using the non-woven filter cloth, the filter cake will be quite dry when the filter pressure reaches 10kg-12kg, and the filter cake will fall off automatically when the filter is opened. When users choose non-woven filter cloth, they mainly consider different thickness and quality of non-woven filter cloth according to air permeability, filtration precision and elongation. Please click polyester needle felt and polypropylene needle felt for product parameters. Specifications and varieties can be formulated.

Needle punched non-woven fabric series products are formed by fine carding, multiple precise needling or proper hot rolling. Based on the introduction of two high-precision needling production lines at home and abroad, high-quality fiber is selected. Through the cooperation of different production processes and the matching of different materials, hundreds of different products are circulating in the market, including geotextile, geomembrane, halberd flannel, speaker blanket, electric blanket, embroidery cotton, clothing cotton, Christmas crafts, artificial leather base cloth and filter material special cloth.

Processing principle editing voice

The production of non-woven fabric by needling method is completely through a mechanical action, that is, the needling effect of the needling machine, which can strengthen and hold the fluffy fiber net to obtain strength. The basic principle is as follows:

The triangular cross-section (or other cross-section) edge barbed needle was used to repeatedly puncture the fiber net. When the barb passes through the web, the surface and local inner layer fibers of the web are forced to penetrate into the web. Due to the friction between the fibers, the original fluffy web is compressed. When the needle is withdrawn from the web, the fiber bundles are separated from the barb and remain in the web. In this way, many fiber bundles entangle the web and make it unable to return to its original fluffy state. After many times of needling, quite a lot of fiber bundles are punctured into the web, so that the fibers in the web are entangled with each other, thus forming needling nonwovens with certain strength and thickness.

Needle punched nonwovens can be divided into pre needling, main needling, pattern needling, ring needling and tube needling.

Needle punched nonwovens

Needle punched nonwovens

Development characteristics of editing voice

Needle punched nonwovens account for 28% to 30% of the nonwovens production line. In addition to the conventional air filtration and dust control, the new application space of needle punched nonwovens is being expanded. Transportation, industrial wiping... Any nonwovens process combination or species combination is actually possible, which makes its characteristics adapt to the special conditions More application requirements.

The standardization problems of needle punched non-woven products, such as large gap in standards and backward revision, are also paid attention to by the production and application parties. Industrial textiles involve health, safety, environmental protection and other fields. According to the standardization law, mandatory standards should be formulated, but the existing mandatory standards are less, which also affects the unification of the standard index requirements and the implementation. On the one hand, producers often pay attention to the general performance of products and use the relevant recommended national standards or industry standards drafted by the textile industry; The product users often focus on the engineering performance of the product, and use the relevant industry standards, which is contradictory.

In addition, the standard system is not in line with international standards. In view of the insufficient centralized management of China's industrial textile industry, the lack of institutions that pay close attention to and specially study international and foreign advanced industrial textile standards, and the insufficient collection, summary and analysis of relevant standard information, the index requirements and testing methods are inconsistent with international standards.

The use of industrial textiles is different, and it has the strangeness and complexity that other textiles do not have. It is a test for all personnel, including experts, in the relevant links of industrial textiles. Therefore, the consensus of the industry is to give full play to the enthusiasm and role of industrial textile associations at all levels, speed up the formulation and revision of industrial textile standards, and jointly promote the scientific and standardized operation of industrial textile standardization.

Relationship editing voice

Spunbonded fabric is subordinate to non-woven fabric. There are many production processes for non-woven fabrics, among which spunbond process is one of them (including spunbond process, melt blown process, hot rolling process and water pricking process. Most of the non-woven fabrics on the market are produced by spunbond process)

According to the composition of non-woven fabrics, there are polyester, polypropylene, nylon, spandex, acrylic, etc; Different components have different styles of non-woven fabrics. Spunbonded fabric usually refers to polyester spunbonded fabric and polypropylene spunbonded fabric; The style of these two kinds of cloth is very close, which can be distinguished by high temperature test.

Different editing voice

Needle punched nonwovens and spunlaced nonwovens belong to nonwovens (also called nonwovens), which are two kinds of Nonwovens in dry / mechanical reinforcement. As the name suggests, the biggest difference between the two technologies is reinforcement, one is mechanical needle reinforcement, the other is mechanical high-pressure water needle reinforcement. The different technologies directly make the functional application of the finished products different.

The gram weight of needle punched nonwovens is generally higher than that of spunlaced nonwovens. The raw material of Spunlaced non-woven fabric is more expensive, the fabric surface is more delicate, and the production process is cleaner than acupuncture. It is widely used in medical, health and beauty. The needling materials are more extensive than Spunlaced ones, such as filter material * / felt material / geotextile, etc.

The difference between acupuncture and spunlace: acupuncture is generally thicker, the weight of a gram is generally more than 80 grams, the fiber is thicker, the handle is rough, and there are small pinholes on the surface. The common weight of Spunlaced cloth is below 80g, and the special weight is 120-250g, but it is rare. The handle of the Spunlaced cloth is delicate, and there are fine strips of spunlaced lines on the surface longitudinally.