Basic technical analysis of non-woven fabrics

First, the definition of non-woven fabrics

Non-woven fabrics (nonwoven), also known as non-woven fabrics, non-woven fabrics.

A sheet, web or batt of oriented or randomly arranged fibers bonded to each other by friction, 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 can be natural or chemically processed, and can be staple fibers, filaments, or fibers formed in situ.

Note: 1. The difference between wet-laid non-woven fabrics and wet-laid papermaking is that non-woven fabrics should meet one of the following conditions:

a. Fibers with a ratio greater than 300 (excluding chemically cooked vegetable fibers) account for more than 50% of the mass; and its density is less than 0.4/cm⒊

2, and viscose fibers are not considered to be chemically cooked vegetable fibers.

Second, fiber raw materials

There are many kinds 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, polyester, nylon, polypropylene, acrylic, vinylon etc; );

Microfiber (fineness less than 0.3dtex);

Three-dimensional crimped hollow fiber;

Colored fiber;

High performance Fiber (carbon fiber, aramid fiber, 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 non-woven fabrics (table omitted)

3. Classification of non-woven fabrics

There are many classification methods for non-woven fabrics. It can be classified according to the processing route of the non-woven part: the method of forming the web and the use of the product. The following table is classified according to the different web forming methods of the non-woven fabric.

4. Products and applications of non-woven fabrics

(1) Non-woven fabrics for medical and health care

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

(2) Non-woven fabrics for home decoration

Carpets and floor coverings;

rug backings;

curtains and drapes ;

tablecloths, bedspreads, wall coverings;

mattresses, furniture covering cloths;

artificial turf.

(3) Non-woven fabrics for garments

All kinds of clothing decorative linings;

warm flakes for winter clothing; ;

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

(4) Footwear and imitation leather non-woven fabrics

fabrics, artificial suede;

lining for shoes, leather bags and luggage;

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Interlining and support (reinforcing) material.

(5) Filter materials

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

High temperature resistant, anti-corrosion filter Material: used to filter high-temperature, corrosive exhaust gas and dust from industrial furnaces and kilns.

(6) Geotextiles

Geotextiles for underground drainage and irrigation;

Geotextiles for separation and reinforcement in road and railway construction; p>

Geotextiles for reinforcement of bank slopes and dams; geotextiles for bridge engineering; waste dumping ponds; impermeable geotextiles for artificial pools; waterproof asphalt base fabrics.

(7) Automobile industry

Seat covers, sun visors, door soft pads, roof and luggage compartment padding and covering materials, thermal insulation and sound insulation materials, carburetors, air Filters, base fabrics for tufted carpets; needle-punched looped molded carpets, sofa upholstery materials.

(8) Industrial non-woven fabrics

Oil absorbing materials for oil removal from sea surface in ports and oil recovery in offshore oil production areas;

Electrical insulation materials; battery separators Plate cloth; industrial polishing material;

Glass steel pipe reinforced substrate, industrial tape substrate, industrial hose substrate.

(9) Agricultural non-woven fabrics

Household harvest fabrics, frost-proof fabrics, insect-proof fabrics, soil moisturizing fabrics, seedling raising fabrics, greenhouses.

(10) Household products non-woven fabrics

Wiping cloths, shoe shine cloths, suit covers, wrapping cloths, bedding collection bags, pillowcases, seat covers, gift bags, Tea bags, kitchen filter residues, water filter bags.

(11) Non-woven fabrics for packaging tooling: non-woven bags, non-woven bags, non-woven wraps, non-woven storage boxes, etc.

(12) Others

Disk liner;

Coated base fabric;

Packaging material;

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

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