Nonwoven fabrics break through the traditional textile principle and have the characteristics of short process flow, fast production speed, high output, low cost, wide application, and multiple sources of raw materials. They are a new generation of environmentally friendly materials with the characteristics of water repellency, breathability, flexibility, non-combustibility, non-toxicity, non-irritation, and rich colors.
The fibers used in the production of nonwoven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, polyethylene (HDPE), and polyvinyl chloride (PVC).
According to application requirements: non-woven fabrics are divided into two categories: disposable and durable.
According to production process:
1.Spunlace non-woven fabrics: The spunlace process is to spray high-pressure fine water flow onto one or more layers of fiber webs to entangle the fibers with each other, thereby reinforcing the fiber web and giving it a certain strength.
2. Heat-bonded non-woven fabric: Heat-bonded non-woven fabric refers to adding fibrous or powdery hot-melt bonding reinforcement materials to the fiber web, and the fiber web is then heated, melted, cooled and reinforced into cloth.
3. Pulp air-laid non-woven fabric: Air-laid non-woven fabric can also be called dust-free paper and dry papermaking non-woven fabric. It uses air-laid technology to open the wood pulp fiberboard into a single fiber state, and then uses air flow to agglomerate the fibers on the mesh curtain, and the fiber web is then reinforced into cloth.
4. Wet-laid nonwoven fabric: Wet-laid nonwoven fabric is to open the fiber raw materials placed in the water medium into single fibers, and at the same time mix different fiber raw materials to make a fiber suspension slurry, which is transported to the web-forming mechanism, and the fibers are formed into a web in a wet state and then reinforced into a cloth.
5. Spunbond nonwoven fabric: Spunbond nonwoven fabric is a nonwoven fabric made by laying the filaments into a web after the polymer has been extruded and stretched to form continuous filaments. The web is then bonded, thermally bonded, chemically bonded or mechanically reinforced to make the web into a nonwoven fabric.
6. Meltblown nonwoven fabric: The process of meltblown nonwoven fabric: polymer feeding—melt extrusion—fiber formation—fiber cooling—netting—reinforcement into cloth.
7. Needle-punched nonwoven fabric: Needle-punched nonwoven fabric is a kind of dry nonwoven fabric. Needle-punched nonwoven fabric uses the puncture effect of needles to reinforce the fluffy fiber net into cloth.
8. Stitched nonwoven fabric: Stitched nonwoven fabric is a kind of dry nonwoven fabric. The stitching method is to use the warp knitting coil structure to reinforce the fiber net, yarn layer, non-textile material (such as plastic sheet, plastic thin metal foil, etc.) or their combination to make nonwoven fabric.
9. Hydrophilic non-woven fabric: Mainly used in the production of medical and sanitary materials to achieve a better feel and not scratch the skin. Sanitary napkins and sanitary pads use the hydrophilic function of hydrophilic non-woven fabrics.
