Introduction and application of non-woven fabrics
Non-woven fabric, also known as non-woven fabric, is composed of directional or random fibers. It is a new generation of environmental protection material with the characteristics of moisture resistance, breathability, flexibility, light weight, non-combustion, easy decomposition, non-toxic and non-irritating, rich color, low price, recyclable and so on. For example, polypropylene (pp material) particles are mostly used as raw materials, which are produced by continuous one-step process of high temperature melting, spinning, wire laying and hot pressing and coiling. It is called cloth because of its appearance and some properties.
Non-woven fabrics can be divided into:
1. Spunlaced non-woven fabric: It is to spray high-pressure micro-water into one or more layers of fiber mesh, so that the fibers are intertwined, so that the fiber mesh can be strengthened and have a certain strength.
2. Heat-bonded non-woven fabric: refers to adding fibrous or powdery hot-melt adhesive reinforcement materials into the fiber mesh, and then heating, melting and cooling the fiber mesh to form a cloth.
3. Pulp air-flow non-woven fabric: also called dust-free paper and dry paper non-woven fabric. It uses the air flow web forming technology to loosen the wood pulp fiberboard into a single fiber state, and then uses the air flow method to make the fibers agglomerate on the web curtain, and then the fiber mesh is reinforced into a cloth.
4. Wet non-woven fabric: It is to loosen the fiber raw materials placed in the water medium into single fiber, and mix different fiber raw materials to make fiber suspension slurry, which is transported to the web forming mechanism, and then the fiber is formed into a mesh in the wet state and then consolidated into a cloth.
5. Spunbonded non-woven fabric: after the polymer has been extruded and stretched to form continuous filament, the filament is laid into a web, and then the web is changed into non-woven fabric through self-adhesion, thermal bonding, chemical bonding or mechanical reinforcement.
6. Melt-blown non-woven fabric: its technological process: polymer feeding - melt extrusion - fiber forming - fiber cooling - mesh forming - reinforcement and cloth forming.
7. Needle-punched non-woven fabric: It is a kind of dry-process non-woven fabric. Needle-punched non-woven fabric uses the puncture effect of the needle to reinforce the fluffy fiber mesh into a cloth.
8. Stitching non-woven fabric: It is a kind of dry process non-woven fabric. Stitching method is to use warp knitting coil structure to reinforce fiber mesh, yarn layer, non-woven materials (such as plastic sheet, plastic thin metal foil, etc.) or their combination to make non-woven fabric.
The uses of non-woven fabrics can be roughly divided into:
(1) Non-woven fabrics for medical and sanitary purposes: surgical clothing, protective clothing, disinfection bag cloth, mask, diaper, civilian cleaning cloth, wiping cloth, wet face towel, magic towel, soft towel roll, beauty products, sanitary towel, sanitary pad and disposable sanitary cloth;
(2) Non-woven fabrics for home decoration: wall cloth, table cloth, bed sheet, bedspread, etc;
(3) Non-woven fabrics for clothing: lining, adhesive lining, wadding, shaped cotton, various synthetic leather bottoms, etc;
(4) Non-woven fabrics for industrial use; Filter material, insulating material, cement packaging bag, geotextile, covering cloth, etc;
(5) Non-woven fabrics for agriculture: crop protection cloth, nursery cloth, irrigation cloth, thermal insulation curtain, etc;
(6) Other non-woven fabrics: space cotton, thermal insulation and sound insulation materials, linoleum, smoke filter, tea bag, etc.
2023 03/06