Nonwoven, also known as non-woven fabric, non-woven fabric.
 

    A sheet, web or batt of oriented or randomly arranged fibers bonded to each other by rubbing, cohesion, or bonding, or a combination of these methods. Excludes paper and woven, knitted, tufted, stitched with stitched yarns, and wetlaid felts (whether or not such articles are needle-punched).

    Fibers may be natural or chemically processed, and may be staple fibers, filaments, or fibers formed in situ.

Note: 1. The difference between wet-laid nonwovens and wet-laid paper is that nonwovens should meet one of the following conditions:

    a. Fibers with a ratio of length to diameter greater than 300 (excluding chemically cooked vegetable fibers) account for more than 50% of the mass of its fiber components;

    b. The fiber with a ratio of length to diameter greater than 300 (excluding chemically cooked vegetable fibers) accounts for more than 30% of its mass, and its density is less than 0.4/cm m⒊

    2. Viscose fibers are not considered to be chemically cooked vegetable fibers.

2. Fiber raw materials

    There are many types of fiber raw materials suitable for non-woven fabrics, mainly including natural fibers and chemical fibers. In order to make nonwovens with different properties, uses and styles, high-performance specialty fibers and functionalized and differentiated fibers can also be used.

    (1) Natural fibers: such as cotton, wool, hemp, silk, etc.;

    (2) Chemical fibers: such as viscose fiber, polyester, nylon, polypropylene, acrylic, vinylon, etc.;

    (3) Differential fibers and high-performance fibers;

    Such as: low melting point thermal bonding fiber (ES fiber, modified polypropylene, copolyamide, copolyester, etc.);

    Microfiber (fineness less than 0.3dtex);

    three-dimensional crimped hollow fibers;

    colored fibers;

    High-performance fibers (carbon fiber, aramid, polyphenylene sulfide, polyether ketone, etc.);

    Water-soluble fibers (water-soluble polyvinyl alcohol fibers, hydroxymethyl cellulose fibers, etc.)

    (4) Properties of main chemical fibers and special fibers used in non-woven 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 part: the method of web forming and the classification of product uses. The following table is classified according to the different web forming methods of non-woven fabrics.

(1) Nonwovens for medical and health care

Fabrics for diapers and sanitary napkins; surgical blouses, cap covers, shoe covers, masks, face shields, hospital patients, bed sheets, mattress pads, pillowcases, antibacterial curtains; wet towels, cotton balls, sterile wraps; white blood cell separation materials, Artificial skin; basic materials for labor protection clothing in radiation situations; medical tape base cloth, bandage base cloth, wound dressing, wound cushion, blood-sucking cloth.

(2) Nonwovens for home decoration

Carpet and floor coverings;

carpet backing;

curtains and drapes;

Tablecloths, bedspreads, wall coverings;

Mattress, furniture covering cloth;

artificial turf.

(3) Nonwovens for clothing

All kinds of clothing decoration lining;

Winter warm flakes;

outerwear and underwear;

Clothing accessories (clothing labels, lace, bras, shoulder pads, etc.).

(4) Footwear and imitation leather nonwovens

fabric, faux suede;

The lining of shoes, bags and suitcases;

Intermediate lining and support (reinforcing) material.

(5) Filter material

Conventional filter material: used in air conditioners, kitchen smoke filters, beverage liquid filtration, etc.;

High temperature and corrosion resistant filter material: used to filter high temperature and corrosive exhaust gas and dust emitted from industrial furnaces and kilns.

(6) Geotextile

Geotextile seepage ditch for underground irrigation and drainage;

Geotextiles for drainage used for separation and reinforcement in highway and railway construction;

Reinforced geotextiles for bank slopes and dams; bridge engineering geotextiles; waste storage ponds; impermeable geotextiles for artificial pools; waterproof asphalt base cloth.

(7) Automobile industry

Seat covers, sun visors, door upholstery, roof and luggage compartment upholstery and coverings, thermal and acoustic insulation, carburetors, air filters, base fabrics for tufted carpets; needle-punched terry moulded carpets, sofas Upholstered material.

(8) Industrial nonwovens

Oil absorbing materials for oil removal from the sea surface of the port and recovery of oil spilled in the offshore oil production area;

Electrical insulating materials; battery separator cloth; industrial polishing materials;

FRP reinforced substrate, industrial tape substrate, industrial hose substrate.

(9) Agricultural nonwovens

Household harvest cloth, anti-frost cloth, insect-proof cloth, soil moisturizing cloth, seedling raising cloth, greenhouse.

(10) Nonwovens for Household Products

Wiping cloth, shoe shine cloth, suit cover, wrapping cloth, futon storage bag, pillowcase, seat cover, gift bag, tea bag, kitchen filter residue, water filter bag.

(11) Others

disk liner;

coated base fabric;

Packaging material;

Special paper (advanced money printing paper, certificate, map cloth, calendar cloth, oil car calligraphy cloth).