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Classification and application of non-woven fabrics (non-woven fabrics)

Non-woven fabrics are the youngest and most promising emerging field in the textile industry. my country's non-woven industry started late, but it has developed rapidly. In the early stage of development, non-woven fabrics were mainly used in the clothing industry as accessories. With the rapid development of social economy and science and technology, new products and new technologies of non-woven fabrics are emerging in an endless stream, changing with each passing day, and the scope of application is becoming wider and wider.

The exact name of non-woven fabrics should be non-woven fabrics, or non-woven fabrics . my country's national standard GB/T5709-1997 "Textile Nonwovens Terminology" defines nonwovens as: oriented or randomly arranged fibers, made by friction, cohesion, or adhesion, or a combination of these methods. Sheets, webs, or batts, excluding paper, woven, knitted, tufted, and wet-rolled felts. Because it is a fabric that does not require spinning or weaving, it just orients or randomly arranges textile staple fibers or filaments to form a web structure, and then uses mechanical, thermal bonding or chemical methods to reinforce it.

Classification of 

non-woven fabrics Non-woven fabrics break through the traditional textile principle, and have the characteristics of short process flow, fast production speed, high output, low cost, wide use, and many sources of raw materials. Breathable, flexible, non-combustible, non-toxic and non-irritating, rich in color and so on.

The fibers used in the production of non-woven fabrics are mainly polypropylene (PP) and polyester (PET). In addition, there are nylon (PA), viscose, acrylic, ethylene (HDPE), and vinyl (PVC).

According to the application requirements: non-woven fabrics are divided into two categories: disposable application type and durable type.

According to the production process, it is divided into: 

1. Spunlace non-woven fabrics: The spunlace process is to spray high-pressure fine water flow onto one or more layers of fiber webs, so that the fibers are entangled with each other, so that the fiber webs are reinforced and have a certain strength.

2 Heat-bonded non-woven fabrics : Heat-bonded non-woven fabrics refer 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 fabrics : Air-laid non-woven fabrics can also be called clean paper and dry-laid non-woven fabrics. It uses the air-laid technology to open the wood pulp fiberboard into a single fiber state, and then uses the air-laid method to condense the fibers on the web-forming curtain, and the fiber web is then reinforced into a cloth.

4 Wet-laid non-woven fabric : Wet-laid non-woven 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 fiber suspension pulp. In the wet state, it is formed into a web and then reinforced into a cloth.

5 Spunbond non-woven fabric : Spunbond non-woven fabric is after the polymer has been extruded and stretched to form continuous filaments, the filaments are laid into a web, and the fiber web is then self-bonded, thermally bonded, chemically bonded. Combination or mechanical reinforcement methods to turn the web into a non-woven fabric.

6 Melt- blown non-woven fabric: The process of melt-blown non-woven fabric: polymer feeding---melt extrusion---fiber formation---fiber cooling---forming web---reinforcing into cloth.

7 Needle-punched non-woven fabrics : Needle-punched non-woven fabrics are a kind of dry-laid non-woven fabrics. Needle-punched non-woven fabrics use the puncture effect of puncturing needles to reinforce fluffy fiber webs into cloth.

8 Stitch-bonded non-woven fabrics : Stitch-bonded non-woven fabrics are a kind of dry-laid non-woven fabrics. foil, etc.) or a combination thereof to be reinforced to make a non-woven fabric.

9 Hydrophilic non-woven fabrics : mainly used in the production of medical and sanitary materials to achieve better hand feel and not scratch the skin. For example, sanitary napkins and sanitary pads use the hydrophilic function of hydrophilic non-woven fabrics.

Application of non-woven fabrics

1. Geosynthetics

Geosynthetics is a high-tech, high value-added industrial textile material with a wide range of uses. Nonwoven geotextiles mainly include: spunbond geotextiles, staple fiber needle punched geotextiles, hot melt bonded geotextiles, geonets and grids, geomembranes, and composite geotextiles. Geotextiles have the functions of reinforcement, isolation, filtration, drainage and anti-seepage in geotechnical construction.

2. Non-woven filter media

Filter materials have become an indispensable and important product in modern society. As a new type of filter material, non-woven filter material is gradually replacing traditional textile filter material with its unique three-dimensional three-dimensional network structure, uniform distribution of pores, good filtration performance, low cost and many varieties, becoming the leading product of filter medium. extremely fast.

3. Nonwovens for medical and hygiene use

Medical non-woven fabric is a product with potential for development. It gives full play to the advantages of fiber as a health care material, and is the product of emerging industrial disciplines formed by the fusion and intersection of multiple disciplines and technologies. Including surgical gowns, protective clothing, disinfection wraps, masks, diapers, civilian wipes, wipes, wet wipes, magic towels, soft towel rolls, beauty supplies, sanitary napkins, sanitary pads, and disposable sanitary cloths.

4. Agricultural nonwovens

Agricultural non-woven fabrics have long service life, good effects and low investment. The promotion of agricultural non-woven fabrics is conducive to promoting agricultural modernization. Agricultural uses are mainly for matting, heat insulation, heat preservation, wind barrier, fruit protection, pest control, seedling raising, sowing, covering, etc.

5. Nonwovens for clothing

The non-woven adhesive lining used for clothing has the characteristics of light weight, softness, low cost, wide variation range of thickness and thickness, strong adaptability, non-directional arrangement of fibers, and large elasticity, and is easy to be compatible with various fabrics. Including lining, adhesive lining, flakes, styling cotton, various synthetic leather base fabrics, etc.

6. Home decoration, daily necessities and packaging materials

Mainly refers to the lining of sofas and beds, curtains and curtains, tablecloths, household appliances cover cloth, suit covers, car interiors, car protective covers, wipers, equipment materials, commodity packaging cloth, etc.

Its characteristics and specific uses are:

Durable, disposable. Insulating, conducting. Softness, stiffness. fineness, expansion.

Isotropic, anisotropic. Filterability, breathable and impermeable. Elasticity, stiffness.

Light, relaxed, warm. Thin as cicada wings, thick as felt. Waterproof and breathable.

Ironing, sewing, moulding. Flame retardant, antistatic. Water-permeable, waterproof, wear-resistant, fleece.

Wrinkle resistance, good elasticity, high moisture absorption, water repellency.

Medical and hygiene: surgical gowns, caps, hoods, gypsum cotton wool, women's sanitary napkins, baby diapers, wet face wipes, sanitary underwear, dust cover.

Agriculture: Harvest cloth, greenhouse cloth.

Industry: floppy disk lining, speaker cloth, filter material, sound insulation felt for speakers, sealing ring lining, cable cloth, glass fiber reinforced plastic towel, industrial wipe, shockproof liner, insulating material, tape base lining, pipe base lining, ventilation duct, Sharpie cloth.

Packaging: composite cement bag, luggage lining, packaging base lining, quilt, storage bag, mobile jacquard luggage.

Clothing and shoemaking: Garment lining, flakes, toe lining, heel lining, underwear, artificial deerskin, synthetic leather, warm shoe lining, cloth sole lining.

Automotive industry: waste spun thermal insulation felt, shockproof felt, headliner, seat cushion lining, carpet, door lining, automotive filter element, molded seat cushion.

Household clothing: sofa inner cloth, carpet, wall cloth, mirror cloth, tea bags, vacuum cleaner filter bags, shopping bags, printed sheets, entertainment covers, cushions, sleeping bags, dry cleaning cloths, scouring pads, curtains, tablecloths, lampshade.

Civil engineering, construction: reinforcement, reinforcement, filtration, linoleum base fabric, drainage board, roof waterproofing, railway, highway, berm, water slope, port sound insulation, sewers, heat protection, separation, drainage.

Other uses: launch vehicles, missile head heat-proof cone, tail nozzle throat lining, high-grade money printing paper, space shuttle heat-resistant tile, map cloth, calendar cloth, artificial cloth, oil painting cloth.

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