Processing principle and characteristics of needle punched non-woven fabrics

Processing principle
The production of non-woven fabrics by acupuncture is entirely through a mechanical action, that is, the puncture of the needle of the acupuncture machine, to reinforce and cohere the fluffy fiber web to obtain strength. The basic principle is:
The web is repeatedly punctured with barbed barbs with triangular section (or other section) edges. 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-punched nonwoven material with a certain strength and thickness.
Acupuncture nonwovens include pre-punching, main punching, pattern acupuncture, ring acupuncture and tubular acupuncture.

Development characteristics

Needle-punched non-woven fabrics account for 28 to 30 percent of non-woven fabric production lines. In addition to conventional air filtration and dust control, the new application space of needle-punched non-woven fabrics is being expanded. , transportation, industrial wiping... any combination of nonwoven processes or types is practically possible, which makes its properties ideally suited to special and more application requirements.
Standardization issues such as the large standard gap and the lag in revision of needle-punched non-woven products have also attracted the attention of all parties in production and application. Industrial textiles involve the fields of hygiene, safety, environmental protection, etc. According to the Standardization Law, mandatory standards should be formulated, but there are few existing mandatory standards, which also affects the difficulty of unifying the requirements of various indicators of the standard, and the implementation is also affected. . On the one hand, product producers tend to focus on general product performance and use relevant recommended national or industry standards drafted by the textile industry; on the other hand, product users tend to focus on product engineering performance and use relevant industry standards, resulting in great contradictions.
In addition, the standard system is not in line with international standards. In view of the insufficient centralized management of my country's industrial textile industry, there is no organization that pays close attention to and specializes in international and foreign advanced industrial textile standards, and the collection, aggregation, and analysis of relevant standard information are not enough, resulting in index requirements and testing methods and international standards. formulate inconsistencies.
Technical textiles have different uses, and are unfamiliar and complex than other textiles. It is a test for all personnel involved in technical textiles, including experts. Therefore, the consensus of the industry is to fully mobilize 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.