Non-woven fabric breaks through the traditional textile principle, and has the characteristics of short process flow, fast production speed, high output, low cost, wide use, and multiple sources of raw materials. It is a new generation of environmentally friendly materials with the advantages of water repellency, breathability, flexibility, non-combustibility, non-toxic, non-irritating, and rich colors. The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose fiber, acrylic fiber, polyethylene fiber (HDPE), and chlorine fiber (PVC). According to application requirements, non-woven fabrics are divided into two categories: disposable application type and durable type.
According to the production process, it can be divided into the following categories.
1. Spunlace non-woven fabric
The spunlace process is to spray a high-pressure fine water stream onto one or more layers of fiber webs, so that the fibers are entangled with each other, so that the fiber webs can be reinforced and have a certain strength.
2. Heat-bonded non-woven fabric
Thermal bonding non-woven fabric refers to adding fibrous or powdery hot-melt bonding reinforcement material to the fiber web, and then the fiber web is heated, melted and cooled to be consolidated into a cloth.
3. Airlaid non-woven fabric
Airlaid non-woven fabrics can also be called dust-free paper and dry-laid non-woven fabrics. It uses air-laid technology to open the wood pulp fiberboard into a single fiber state, and then uses air-flow method to agglomerate the fibers on the web curtain, and then reinforce the fiber web into a cloth.
4. Wet non-woven fabric
The wet-laid non-woven fabric is to open the fiber raw material placed in the water medium into a single fiber, and at the same time mix different fiber raw materials to make a fiber suspension slurry, and the suspension slurry is transported to the web forming mechanism. The fibers are formed into a net in a wet state and then reinforced into a cloth.
5. Spunbond non-woven fabric
Spunbond non-woven fabrics are formed into continuous filaments after the polymer has been extruded and stretched, and the filaments are laid into a net. The fiber net then undergoes self-bonding, thermal bonding, chemical bonding or mechanical reinforcement methods to turn the fiber web into a non-woven fabric.
6. Meltblown non-woven fabric
The process of melt-blown non-woven fabric is as follows: polymer is poured into---melt-extrusion---fiber formation---fiber cooling---netting---reinforcement into cloth.
7. Needle punched non-woven fabric
Needle-punched non-woven fabric is a kind of dry-laid non-woven fabric. Needle-punched non-woven fabrics use the piercing effect of a needle to reinforce the fluffy fiber web into a cloth.
8. Stitched non-woven fabric
Stitched non-woven fabric is a kind of dry-laid non-woven fabric. The stitch-knitting method uses a warp-knitted loop structure to reinforce fiber webs, yarn layers, non-woven materials (such as plastic sheets, plastic thin metal foils, etc.) or their combinations to make non-woven fabrics.
9. Hydrophilic non-woven fabric
Hydrophilic non-woven fabrics are mainly used in the production of medical and sanitary materials to achieve better hand feeling and not scratch the skin. For example, sanitary napkins and sanitary pads use the hydrophilic function of hydrophilic non-woven fabrics.