Raw materials and production process of non-woven fabrics

The raw materials for the production of non-woven fabrics mainly include polyester fiber (polyester), polyamide fiber (nylon), polyacrylonitrile fiber (acrylic), viscose fiber, etc. Its production processes are diverse, including but not limited to the following:

Spunlace non-woven fabric: the fiber web is transported by a conveyor curtain or a metal curtain, pre-wetted and pre-spunlaced by a pre-wetting device, and then enters the spunlace area. In the spunlace area, the fiber web is sprayed by extremely fine high-pressure water from several spunlace devices, and its surface fibers enter the fiber web vertically due to strong impact. At the same time, due to the three-dimensional structure of the three-dimensional structure of the transport curtain, the water flow, it is reflected back at different angles to form a reverse impact on the fibers, so that the fibers in the fiber web are entangled with each other and tightly held together to form a wet non-woven fabric with a certain strength.
Thermal bonding non-woven fabric: fiber or powder hot melt bonding reinforcement material is added to the fiber web, and the fiber web is then heated, melted, cooled and reinforced into cloth.
Air-laid non-woven fabric: the wood pulp fiberboard is loosened into a single fiber state by air-laid technology, and then the fiber is agglomerated on the mesh curtain by air-flow method, and the fiber web is consolidated into cloth.
Wet-laid non-woven fabric: the fiber raw materials placed in the water medium are opened into single fibers, and different fiber raw materials are mixed at the same time to make fiber suspension slurry, which is transported to the mesh forming mechanism, and the fibers are reeled and fixed into cloth in the wet state.
Meltblown non-woven fabric: the melt extruded by the screw is blown with high-speed and high-temperature air flow, so that the melt stream is stretched at a higher ratio to form ultra-fine short fibers, and then piled up on the screen curtain or the mesh drum to form a continuous short fiber network, and then the non-woven fabric is made by self-bonding or other reinforcement processes.
Needle-punched non-woven fabric: the fluffy fiber web is reinforced into cloth by the puncture effect of the puncture needle.
Stitch-bonded non-woven fabric: A non-woven fabric is made by reinforcing a web, a yarn layer, a non-woven material (e. g., a plastic sheet, a plastic thin metal foil, etc.) or a combination thereof using a warp-knitted loop structure.
Spunbond non-woven fabric: the fiber spinning technology and non-woven molding technology are combined, using the principle of melt spinning, the raw materials are melted and mixed by the extruder, and then extruded by the spinneret of the spinning head to form a melt trickle. The high-speed quenching air is used to cool the extruded melt stream, and the fiber is stretched by the drawing air during the cooling process to form continuous filaments with high strength and stable performance. After the filament is divided into filaments to form a uniformly distributed monofilament structure, it is laid on a net curtain with negative pressure to form a nonwoven web. After the subsequent reinforcement device, the fiber web is hot-rolled, needled or spunlaced, and then wound up by the coiling device to obtain the product.