Non-woven fabrics - basic knowledge of non-woven fabrics

First, the definition of non-woven fabric Non-woven fabric (nonwoven), also known as non-woven fabrics, non-woven fabrics.
A sheet, web or batt made by orienting or randomly arranging fibers by friction, cohesion or bonding or a combination of these methods. It does not include paper as well as woven fabrics, knitted fabrics, tufted fabrics, stitchbonded fabrics with stitching yarns, and wet-reduced felts (whether or not such products are needle-reinforced).
The fibers may be natural or chemically processed, and may be short fibers, filaments or fibers formed in situ.
Note: 1. The difference between wet and non-woven paper is that the non-woven fabric should meet one of the following conditions:
a, the fiber whose composition has a length to diameter ratio of more than 300 (excluding chemically cooked plant fibers) accounts for more than 50% of the mass;
b. Fibers with a ratio of length to diameter of more than 300 in fiber composition (excluding chemically cooked plant fibers) account for more than 30% of the mass, and its density is less than 0.4/c m3.
2. Viscose fibers are not considered to be chemically cooked plant fibers.

Second, fiber raw materials Suitable for non-woven fabrics, there are many types of fiber raw materials, mainly natural fibers and chemical fibers. In order to produce nonwovens of different properties, uses and styles, high performance specialty fibers and functionalized, 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.);
Microfiber (denier than 0.3dtex);
Three-dimensional crimped hollow fiber;
Colored fiber
High performance fiber (carbon fiber, aramid, polyphenylene sulfide, polyether ketone, etc.);
Water-soluble fiber (water-soluble polyvinyl alcohol fiber, hydroxymethyl cellulose fiber, etc.)
(4) Properties of main chemical fibers and special fibers used in nonwoven fabrics (slightly omitted)

Third, the classification of non-woven fabrics of non-woven fabrics can be classified according to the processing route of non-woven parts: the method of forming webs and the classification of product uses. 4. Products and applications of non-woven fabrics (1) Non-woven fabrics for medical and health care Fabrics for diapers and sanitary napkins; surgical blouses, caps, shoe covers, masks, masks, hospital patients, bed sheets, mattresses, pillowcases, anti-bacterial curtains; wet towels, cotton balls, sterile cloths; white blood cell separation materials, Artificial skin; basic materials for labor protection clothing in the case of radiation; medical tape base cloth, bandage base cloth, wound dressing, wound cushion, blood-sucking cloth.
(ii) Non-woven carpets and flooring materials for household decoration;
Carpet base fabric;
Curtains and curtains;
Tablecloths, bedspreads, wall coverings;
Mattress, furniture covering cloth;
artificial turf.
(3) linings for various clothing and non-woven fabrics;
Winter warm flakes;
Outerwear and underwear;
Fashion accessories (clothing labels, lace, bras, shoulder pads, etc.).
(iv) Footwear and imitation leather nonwoven fabrics, artificial suede;
Lining of shoes, purses and suitcases;
Intermediate lining and support (reinforced) material.
(5) Filtration materials Conventional filter materials: used for air conditioners, kitchen smoke filters, beverage liquid filtration, etc.
High temperature resistant, corrosion resistant filter: Used to filter high temperature, corrosive exhaust and dust emitted from industrial furnaces.
(6) Geotextile seepage ditch for underground drainage of geotextiles;
Geotextile for drainage and separation used in highway and railway construction;
Geotechnical fabric for reinforcement of bank slope dyke; geotextile for bridge engineering; waste stacking pool; impervious geotextile for artificial pool; waterproof asphalt base fabric.
(vii) Car industry seat covers, sun visors, soft padding for doors, gaskets and covering materials for roof and luggage compartments, insulation and sound insulation materials, vaporizers, air filters, base fabrics for tufted carpets; needled loops Moulded carpet, sofa cushion material.
(8) Industrial non-woven fabrics for sea surface degreasing and oil absorption materials for oil spill recovery in offshore oil recovery areas;
Electrical insulating material; battery separator cloth; industrial polishing material;
Glass steel tube reinforced substrate, industrial tape substrate, industrial hose substrate.
(9) Agricultural non-woven fabrics, household harvest cloth, anti-frost cloth, pest control cloth, soil moisturizing cloth, nursery cloth, greenhouse greenhouse.
(10) Household goods non-woven cloth wipes, shoes, cloth, suits, bags, quilts, pillowcases, seat covers, gift bags, tea bags, kitchen filter residue, water filter bags.
(11) Other disk pads;
Coated base fabric;
Packaging Materials;
Special paper (advanced banknote paper, certificate, map cloth, calendar cloth, oil car calligraphy cloth).