Views: 4 Author: Site Editor Publish Time: 2022-07-13 Origin: Site
Non woven fabric, also known as non-woven fabric, is composed of directional or random fibers. It is a new generation of environmental protection materials. It is moisture-proof, breathable, flexible, light, non combustion supporting, easy to decompose, non-toxic and non irritating, rich in color, low price, recyclable and so on. For example, polypropylene (PP) pellets are mostly used as raw materials, which are produced by continuous one-step process of high-temperature melting, wire spraying, wire laying, hot pressing and coiling. It is called cloth because of its appearance and some properties.
Non woven fabric is a kind of non-woven fabric, which is a non-woven fabric formed by directly using polymer chips, short fibers or filaments to form a network through air flow or machinery, and then through spunlacing, needling, or hot rolling reinforcement, and finally after finishing. The new fiber products with soft, breathable and planar structure have the advantages of no fiber chips, strong, durable, silky soft, and the feeling of cotton. Compared with cotton products, non-woven bags are easy to form and cheap. In terms of environmental protection, the raw material of most non-woven fabrics currently used is polypropylene, while the raw material of plastic bags is polyethylene. Although the names of the two substances are similar, their chemical structures are very different. The chemical molecular structure of polyethylene is quite stable and difficult to degrade, so it takes 300 years for plastic bags to decompose; The chemical structure of polypropylene is not firm, and the molecular chain can be easily broken, so it can be effectively degraded, and enter the next environmental cycle in a non-toxic form. A non-woven shopping bag can be completely decomposed in 90 days. Moreover, non-woven shopping bags can be reused for more than 10 times, and the pollution degree to the environment after being discarded is only 10% of that of plastic bags
Non woven fabrics have no warp and weft threads, so it is very convenient to cut and sew, and it is light and easy to set, which is deeply loved by craft lovers. Because it is a kind of fabric formed without spinning and weaving, it is only formed by directional or random support of textile staple fibers or filaments to form a fiber web structure, and then reinforced by mechanical, thermal bonding or chemical methods. To put it simply, it is not interwoven and knotted by yarns one by one, but the fibers are directly bonded together by physical methods. Therefore, when you get the sticky scale in your clothes, you will find that you can't pull out the thread ends one by one. Nonwovens break through the traditional textile principle, and have the characteristics of short process flow, fast production speed, high output, low cost, wide application, and many sources of raw materials.
Non woven fabrics, including chemical fibers and plant fibers, are made on wet or dry paper machines with water or air as the suspension medium. Although they are cloth, they are not woven, so they are called non-woven fabrics. Non woven fabric is a new generation of environmental protection materials, which has the advantages of strong, breathable and waterproof, environmental protection, flexibility, non-toxic and tasteless, and low price. It is a new generation of environmental protection material, which is water repellent, breathable, flexible, non combustion supporting, non-toxic, non irritating, rich in color and so on. If the material is placed outdoors and decomposed naturally, its maximum life is only 90 days. If it is placed indoors and decomposed within 8 years, it is non-toxic, tasteless and free of any residual substances when burning, so it does not pollute the environment, so environmental protection comes from it. Non woven products are rich in color, bright and bright, fashionable and environment-friendly, widely used, beautiful and generous, with various patterns and styles, light weight, environmental protection, recyclable, and internationally recognized as environmental protection products to protect the earth's ecology. It is suitable for agricultural film, shoemaking, tanning, mattress, quilt, decoration, chemical industry, printing, automobile, building materials, furniture and other industries, as well as clothing linings, medical and health disposable surgical clothes, masks, hats, bedsheets, hotel disposable tablecloths, beauty, sauna and even today's fashionable gift bags, boutique bags, shopping bags, advertising bags and so on. Environmental protection products are widely used and economical.
Non woven fabrics have many advantages: 1) breathability 2) filterability 3) heat preservation 4) water absorption 5) waterproof 6) scalability 7) non messy 8) good feel and softness 10) elastic and recoverable 11) no fabric directionality 12) high productivity and fast production speed compared with textile fabrics 13) low price, mass production, etc. 14) Fixed size, not easy to deform
The disadvantages are: 1) the strength and durability are poor compared with textile fabrics; 2) they cannot be cleaned like other fabrics; 3) the fibers are arranged in a certain direction, so they are easy to split from the right angle, etc. Therefore, the recent improvement of production methods mainly focuses on the improvement of preventing division.
(1) Medical and sanitary non-woven fabrics: surgical clothes, protective clothing, disinfection bags, masks, diapers, civilian rags, wipes, wet towels, magic towels, soft towel rolls, beauty products, sanitary towels, sanitary pads, and disposable sanitary cloths;
(2) Non woven fabrics for court decoration: wall cloth, tablecloth, bedspread, bedspread, etc;
(3) Non woven fabrics for clothing: linings, adhesive linings, flocs, shaped cotton, various synthetic leather substrates, etc;
(4) Industrial non-woven fabrics; Base materials, reinforcement materials, polishing materials, filter materials, insulating materials, cement packaging bags, geotextiles, wrapping cloth, etc. of roof waterproof coiled materials and asphalt tiles;
(5) Agricultural non-woven fabrics: crop protection cloth, seedling raising cloth, irrigation cloth, thermal insulation curtain, etc;
(6) Other non-woven fabrics: Space cotton, thermal insulation and sound insulation materials, linoleum, cigarette filters, bags, tea bags, shoe materials, etc.