Basic Principle and Technological Method of Needle Punching Nonwoven Fabric

Basic principle of needle punching non-woven fabric:

The barbs with triangular cross sections (or other cross sections) are used to repeatedly puncture the web. When the barb passes through the fiber web, the surface of the fiber web and the local inner fibers are forced to penetrate into the fiber web. Due to the friction between the fibers, the original fluffy web is compressed. When the lancet exits the web, the punctured fiber bundle leaves the barb and stays in the web. In this way, many fiber bundles are entangled in the web to prevent it from returning to its original fluffy state. After many times of needle punching, a considerable number of fiber bundles are penetrated into the web, so that the fibers in the web are entangled with each other, thereby forming a needle punched nonwoven material with a certain strength and thickness. Acupuncture non-woven process forms include pre-punched, main-punched, patterned acupuncture, ring-shaped acupuncture and tubular acupuncture.

Needle-punched nonwoven fabric The non-woven fabric produced by the needle punching method is completely through a mechanical action, that is, the needle punching effect of the needle punching machine, which strengthens and embraces the fluffy web to obtain strength.

Process method:

Needle-punched non-woven fabric is a kind of non-woven fabric, which is made of polyester and polypropylene raw materials, and is processed by proper hot rolling after multiple needle punching. Hundreds of commodities are made with different materials according to different processes. It is made of polyester and polypropylene raw materials, carded, combed, pre-acupuncture and main acupuncture.

The center is sandwiched with a mesh cloth, and then double-passed. The air-laid net is needle-punched to form a cloth. The post-press filter cloth has a three-dimensional structure. After heat setting, after singeing, the surface is treated with chemical oil to make the filter cloth. The appearance is smooth, the pores are evenly distributed, the density of the product is good from the surface, the surface of both sides is smooth and the air permeability is good, it is proved that the filter is used on the plate and frame compressor, high pressure can be used, and the filter accuracy is up to 4 microns, according to the user Need to provide two raw materials of polypropylene and polyester.

The above information is provided by paint cover felt factory.