Advantages and disadvantages of non-woven fabrics:
Non-woven fabrics have many advantages: 1) breathability 2) filterability 3) heat insulation 4) water absorption 5) waterproofness 6) stretchability 7) no mess 8) good hand feeling, softness 9) lightness 10) elasticity, resilience 1) no fabric directionality/kloc.
Disadvantages are: 1) Compared with woven fabrics, the strength and durability are poor; 2) Can't be cleaned like other fabrics; 3) The fibers are arranged in a certain direction, so it is easy to split at right angles. Therefore, the recent improvement of production methods mainly focuses on the improvement of preventing division.
Its main uses can be roughly divided into:
(1) Non-woven fabrics for medical and health care: surgical gowns, protective clothing, disinfection kits, masks, diapers, household rags, rags, wet wipes, magic towels, soft towel rolls, beauty products, sanitary napkins, sanitary pads and disposable sanitary napkins.
(2) Non-woven fabrics for home decoration: carpets, wall stickers, tablecloths, sheets, bedspreads, curtains, scouring pads, mops, etc.
(3) Non-woven fabrics for clothing: lining, adhesive lining, wadding, setting cotton, various synthetic leather base fabrics, etc.
(4) industrial nonwovens; Automobile roof tarpaulin, filter material, thermal insulation material, cement packaging bag, geotextile, covering cloth, etc.
(5) Non-woven fabrics for agriculture: crop protection cloth, nursery cloth, irrigation cloth, thermal insulation curtain, etc.
(6) Military non-woven fabrics: high-performance fiber body armor, gun cleaning cloth, military map base cloth, etc.
(7) Other non-woven fabrics: space cotton, heat and sound insulation materials, oil-absorbing felt, cigarette filter tips, tea bags in bags, colorful flags, etc.
Classification of non-woven fabrics
I. Spunlaced nonwovens
The spunlace process is to spray high-pressure micro-water on one or more layers of fiber web, so that the fibers are intertwined and the fiber web is strengthened with certain strength.
Second, heat-seal non-woven fabrics.
Thermal bonding non-woven fabric refers to adding fibrous or powdery hot-melt bonding reinforcing materials to the fiber web, and then heating, melting and cooling the fiber web to strengthen it into cloth.
Third, pulp airlaid nonwovens
Air-laid nonwovens can also be called dust-free paper and dry papermaking nonwovens. 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 bond the fibers to the net curtain, and the fiber net is reinforced into cloth.
Fourthly, wet nonwoven fabric.
Wet-process non-woven fabrics are made by opening fiber raw materials placed in water medium into single fibers, and mixing different fiber raw materials to make fiber suspension slurry, which is conveyed to the web-forming mechanism, and the fibers are web-formed in wet state, and then reinforced into cloth.
5. Spunbonded nonwovens
Spunbonded nonwovens are made by laying the filaments into a net after the polymer is extruded and stretched to form continuous filaments, and then the net is transformed into nonwovens by self-bonding, thermal bonding, chemical bonding or mechanical reinforcement.
Six, melt-blown nonwovens
The technological process of melt-blown nonwovens: polymer feeding-melt extrusion-fiber forming-fiber cooling-web forming-reinforced cloth forming.
Vii. Needle punched nonwovens
Needle punched nonwovens is a kind of dry nonwovens. Needle-punched nonwovens are used to strengthen fluffy fiber webs into cloth by the puncture effect of needles.
Eight, stitching non-woven fabrics
Stitched nonwoven fabric is a dry nonwoven fabric. Sewing method is to use warp-knitted loop structure to strengthen net, yarn layer and nonwoven materials (such as plastic sheet, plastic thin metal foil, etc.). ) or a combination thereof.
Three. Factors affecting the growth rate of non-woven fabrics-
All the factors that affect the growth of man-made fibers can have a certain influence on textiles made of man-made fibers to a certain extent, among which non-woven fabrics have the greatest influence.
The influence of population growth on non-woven fabrics is less than that of other textiles used for clothing. However, if we consider the important application of non-woven fabrics in baby diapers, population growth is also an important influencing factor.
The substitution of natural fibers has great influence on textiles, but little influence on non-woven fabrics, because the production of non-woven fabrics basically depends on artificial fibers.
Commercial development of man-made fibers and specialized application of non-woven fabrics: due to the establishment of international economic treaties, the trade of microfibers, composite fibers, biodegradable fibers and new polyester fibers has increased. This has a great influence on non-woven fabrics, but has little influence on clothing and knitted textiles.
Substitution of textiles and other articles: This includes substitution by non-woven fabrics, knitted textiles, plastic films, polyurea foam, wood pulp, leather, etc. This is determined by the cost and performance requirements of the product.
Introduction of non-woven fabric characteristics
Non-woven fabric is a kind of non-woven fabric, which is formed by directly using polymer chips, short fibers or filaments, netting by air flow or machinery, strengthening by spunlace, needle punching or hot rolling, and finally finishing. The new fiber products have the advantages of softness, breathability and plane structure, and have the feeling of no fiber crumbs, tenacity, durability, silky softness and cotton. Compared with cotton fabric, non-woven bag is easy to form and has low manufacturing cost.
In terms of environmental protection, the raw material of most non-woven fabrics used at present is polypropylene, while the raw material of plastic bags is polyethylene. Although the names of these two substances are similar, their chemical structures are quite different. The chemical molecular structure of polyethylene is quite stable and extremely difficult to degrade, so it takes 300 years for plastic bags to decompose. However, the chemical structure of polypropylene is not firm, and the molecular chain is easily broken, so it can be effectively degraded and enter the next environmental cycle in a non-toxic form, and a non-woven shopping bag can be completely decomposed within 90 days. Moreover, non-woven shopping bags can be reused for more than 10 times, and the environmental pollution after being discarded is only 10% of that of plastic bags.
Nonwoven daily necessities
Introduction of Nonwoven Disposable Products
Medical nonwovens are medical and health-care textiles made of chemical fibers such as polyester, polyamide, polytetrafluoroethylene (PTFE), polypropylene, carbon fiber and glass fiber. Including disposable masks, protective clothing, surgical clothing, isolation clothing, laboratory clothing, nurses' hats, surgical hats, doctors' hats, surgical bags, pregnant women's bags, first aid bags, diapers, pillowcases, bed sheets, quilt covers, shoe covers and other disposable medical consumables. Compared with traditional cotton woven medical textiles, medical nonwovens have the characteristics of high filtration to bacteria and dust, low surgical infection rate, convenient disinfection and sterilization, and easy compounding with other materials. As a disposable product, medical nonwoven products are not only convenient, safe and hygienic, but also can effectively prevent bacterial infection and iatrogenic cross-infection. In China, in recent years, the investment in medical and health industry has reached 1000 billion yuan, of which the total output value of sanitary products and materials is about 64 billion yuan, and it is developing in a diversified direction.
Non-woven flour hardcover bag
Non-woven bag is light, environmentally friendly, moisture-proof, breathable, flexible, flame retardant, non-toxic, non-irritating and recyclable. They are internationally recognized environmental protection products to protect the earth's ecology, and are widely used in various small packaged rice noodles, such as wheat flour, corn flour, buckwheat flour, rice and so on. This non-woven fabric product is printed with ink, which is beautiful and elegant, colorful, non-toxic, tasteless and non-volatile, more environmentally friendly and cleaner than ink printing, and fully meets the environmental protection requirements of modern people. Due to reliable product quality, affordable price and long service life. The main specifications are 1 kg, 2.5 kg, 5 kg, 10 kg, etc.
Nonwoven fashion shopping bag
Fashion shopping bags made of non-woven fabrics are light, environmentally friendly, moisture-proof, breathable, flexible, flame-retardant, non-toxic, non-irritating and recyclable. They are internationally recognized environmental protection products to protect the earth's ecology. This kind of non-woven fabric is printed with ink, which is beautiful and elegant, colorful, non-toxic, tasteless and non-volatile, more environmentally friendly and cleaner than ink printing, and fully meets the environmental protection requirements of modern people.
Characteristics definition and application classification of nonwovens
Durability, disposable. Insulation and conductivity. Flexibility and rigidity. Good. Inflate.
Isotropic, anisotropic. Filtration, air permeability and water impermeability. Elasticity and rigidity.
Lightweight, loose and warm. As thin as cicada wings and as thick as felt. Waterproof and moisture permeable.
Ironing, sewing and shaping. Flame retardant and antistatic. Water-permeable, waterproof, wear-resistant and fluffy.
Wrinkle resistance, good elasticity, high hygroscopicity and water repellency.
Medical care: surgical gown, surgical cap, surgical cover, gypsum cotton wool, female sanitary napkins, baby diapers, wet wipes, sanitary underwear, dust cover.
Agriculture: harvesting cloth, greenhouse cloth.
Industry: Floppy disk lining, trumpet cloth, filter material, soundproof felt for speakers, sealing ring lining, cable cloth, glass fiber reinforced plastic towel, industrial wiping cloth, shockproof gasket, insulation material, tape backing, pipe backing, ventilation pipe, emery cloth.
Packaging: composite cement bag, luggage lining cloth, packaging bottom lining, quilt, storage bag, mobile jacquard luggage cloth.
Clothing and shoemaking: clothing lining, stuffing, toe hard lining, heel lining, underwear, artificial deerskin, synthetic leather, warm shoe lining, cloth sole lining.
Automobile industry: waste spinning insulation felt, shock-proof felt, ceiling, cushion lining, carpet, door lining, automobile filter element, molded cushion.
Household clothes: sofa cloth, carpet, wall cloth, mirror cloth, tea bag, vacuum cleaner filter bag, shopping bag, printed bed sheet, entertainment cover, cushion, sleeping bag, dry cleaning cloth, scouring pad, curtain, tablecloth and lampshade.
Civil engineering and construction: steel bars, reinforcement, filtration, linoleum base cloth, drainage boards, roofing waterproof materials, railways, highways, dikes, water slopes, port sound insulation, sewers, heat protection and isolated drainage.
Other uses: launch vehicle, missile head heat cone, tail nozzle throat liner, advanced banknote printing paper, space shuttle heat-resistant tile, map cloth, almanac cloth, artificial cloth, canvas.
Of course, these are only approximate, I hope to help you understand non-woven fabrics.
Changshu nonwoven equipment professional manufacturing