1. Definition of non-woven fabric Non-woven fabric (nonwoven) is also called non-woven fabric or non-woven fabric.
Oriented or randomly arranged fibers are combined into a sheet, web, or batt by friction, entanglement, or adhesion, or a combination of these methods. Does not include paper and woven fabrics, knitted fabrics, tufted fabrics, stitched fabrics with stitched yarns and wet-shrinked felt products (regardless of whether such products are needle-punched or not).
The fibers may be natural or chemically processed, and may be short fibers, filaments, or fibrous formed on the spot.
Note: 1. The difference between wet-laid non-woven fabric and wet-laid paper is that non-woven fabric should meet one of the following conditions:
a. Fibers with a length to diameter ratio greater than 300 (excluding chemically cooked plant fibers) account for more than 50% of the fiber content;
b. Fibers with a length to diameter ratio greater than 300 (excluding chemically cooked plant fibers) account for more than 30% of the quality, and their density is less than 0.4 / c m
2. Viscose fiber is not considered to be chemically cooked vegetable fiber.
2. Fiber raw materials There are many types of fiber raw materials suitable for non-woven fabrics, mainly two types of natural fibers and chemical fibers. In order to produce non-woven fabrics with different properties, uses and styles, high-performance special fibers and functionalized and differentiated fibers can also be used.
(1) Natural fibers: such as cotton, wool, hemp, silk, etc .;
(2) Chemical fiber: such as viscose fiber, polyester, nylon, polypropylene, acrylic, vinylon, etc .;
(3) Differentiated fibers and high-performance fibers;
Such as: low melting point thermal bonding fiber (ES fiber, modified polypropylene, copolyamide, copolyester, etc.);
Superfine fiber (fineness less than 0.3dtex);
Three-dimensional coiled hollow fiber;
Colored fiber
High-performance fibers (carbon fiber, aramid, polyphenylene sulfide, polyether ketone, etc.);
Water-soluble fiber (water-soluble polyvinyl alcohol fiber, hydroxymethyl cellulose fiber, etc.)
(4) Performance of main chemical fibers and special fibers used in nonwoven fabrics (table omitted)
3. Classification of non-woven fabrics There are many classification methods of non-woven fabrics, which can be classified according to the processing route of the non-woven department: classification of web forming methods and product uses. 4. Products and applications of non-woven fabrics Fabrics for diapers and sanitary napkins; surgical blouses, caps, shoe covers, masks, face masks, hospital patients, bed sheets, cushions, pillowcases, anti-bacterial curtains; wet towels, cotton balls, sterile wraps; white blood cell separation materials, Artificial skin; basic materials for labor protection suits used in radiation; medical tape base cloth, bandage base cloth, wound dressing, wound cushion, blood-sucking cloth.
(2) Non-woven carpets and floor materials for household decoration;
Carpet backing;
Curtains and curtains;
Tablecloths, bed covers, wall coverings;
Cloth for mattress and furniture;
artificial turf.
(3) Decorative linings for all kinds of nonwoven fabrics for clothing;
Winter warmth flakes;
Outerwear and underwear;
Clothing accessories (clothing labels, laces, bras, shoulder pads, etc.).
(4) Footwear and imitation leather non-woven fabrics, artificial suede;
Lining of shoes, bags and suitcases;
Middle lining and support (reinforcement) material.
(5) Filter materials Conventional filter materials: used for air conditioning, kitchen smoke filters, beverage liquid filtration, etc .;
High temperature resistant and anti-corrosion filter material: used to filter high temperature, corrosive tail gas and dust discharged from industrial furnaces and kilns.
(6) Geotextile seepage ditch for geotextile underground drainage and irrigation;
Geotextile for drainage and separation used in road and railway construction;
Geotextiles for shore slope dam reinforcement; geotextiles for bridge engineering; waste storage pools; impervious geotextiles for artificial pools;
(7) Automotive industry seat covers, sun visors, soft door liners, roof and luggage compartment liners and covering materials, insulation and sound insulation materials, vaporizers, air filters, tufted carpet backings; needle-punched loop Molded carpet, sofa cushion material.
(8) Oil-absorbing materials for industrial non-woven fabric port sea surface oil removal and oil recovery area recovery oil leakage;
Electrical insulation materials; battery separator cloth; industrial polishing materials;
Glass fiber reinforced plastic substrate, industrial tape substrate, industrial hose substrate.
(9) Agricultural non-woven cloth household harvest cloth, frost-proof cloth, insect-proof cloth, soil moisture-proof cloth, seedling-raising cloth, greenhouse.
(10) Houseware non-woven wipes, shoe cloths, suit covers, furry cloths, bedding collection bags, pillowcases, chair sand covers, gift bags, tea bags, kitchen filter residues, water filter bags.
(11) Other disk pads;
Coated base fabric;
Packaging Materials;
Special paper (advanced banknote printing paper, certificate, map cloth, calendar cloth, oil car calligraphy cloth).
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