The latest use: the use of non-woven fabrics in apparel fabrics
The application of non-woven fabrics in non-durable garments has become very popular, such as spunlaced medical protective clothing, PP disposable spun-bond protective clothing and SMS medical protective clothing. At present, the development of new products in this area includes two aspects: First, the new development of existing materials in the field of apparel applications; Second, the development of new non-woven fabrics.
Non-durable non-woven fabrics
SMS non-woven fabrics are spunbonded and meltblown composite products, which have high strength, good filtration performance, no adhesive, no toxicity, etc., have played an important role in the field of medical and industrial filter materials, the recent application is With the characteristics of breathable SMS, no generation of fiber dust, and the prevention of particle exchange between the human body and the outside world, it is used in pharmaceuticals, bioengineering, optoelectronic processing, electrical components and chips that require a highly clean production environment. Spunbonded nonwovens are made of high-strength continuous filaments and occupy a large proportion in the disposable protective clothing market. The latest development is the addition of special additives or post-finishing in the production process of spunbonded nonwovens. The products are fire-retardant, anti-static, anti-radiation, hydrophobic, moisture-proof, anti-bacterial, warmth and other functions.
In the development of new fibers, water-soluble non-woven fabrics are an environmentally friendly product, and its application range is gradually expanding. The use of polyvinyl alcohol water-soluble fiber to produce spunlace non-woven fabrics is a good material for producing radiation-proof and anti-pollution clothing. In order to increase the protective effect, it can also be compounded with water-soluble film to increase the barrier properties of protective clothing. In addition, in the use of new fibers, foreign companies have also developed superabsorbent fiber (SAF) technology in the production of nonwovens. This non-woven fabric containing SAF has a particularly good soft touch and water-absorbing properties, and can be used as a wearer to quickly absorb sweat from the body and increase the comfort of the micro-environment between the garment and the human body.
In the development of new composite non-woven materials, the United States has developed a new type of cotton fiber composite non-woven fabric, the surface layer of cotton and polypropylene fiber thermal bonding non-woven fabric, and spunbond fabric composed of two or three composite materials , Product feel is similar to cotton knitted fabrics, with good strength and elongation, water absorption and water retention, wicking speed, small pilling performance advantages, after finishing, the elastic recovery in an instant when the elongation is 50% The rate can reach 83% ~ 93%, suitable for the production of medical isolation and disposable underwear. In addition, the new generation of biochemical protective clothing developed by the U.S. Army makes full use of the advantages of three kinds of woven, knit, and non-woven fabrics. The outer layer of the protective clothing is tear-resistant nylon/cotton fiber poplin, which is treated with water repellent; the lining is tape. Non-woven fabric with activated carbon; the innermost layer is tricot fabric. Compared with the existing protective clothing, this kind of clothing provides the military with special protection against chemical pollution, while at the same time it increases the lightness of the clothing and reduces the cost, and can withstand at least 3 times of washing.
Durable non-woven fabrics
Due to the gap between drapability, elasticity, stretchability, opacity, and pilling and the requirements of apparel fabrics, and the lack of a certain sense of art in appearance, nonwovens are used in durable garments. Difficulty. However, the non-woven fabric has characteristics that it is not easy to loosen and slip, can be directly involved in the design of the cloth edge, and does not require ironing and seaming on the seams of the garment, which is different from the woven fabric and the knitted fabric. It is optimistic about the advantages of simple sewing process of non-woven garments, and many scientific researchers and companies are brave enough to face the risk of product development. The focus of research in recent years has focused on how to increase the drape, abrasion resistance, elasticity, and elastic recovery ability of nonwoven fabrics, making them suitable for durable garment fabrics.
BBA Fiberweb and Dow Chemical have developed a new type of spunbonded elastic nonwoven fabric. The fiber is a core bicomponent fiber. The core is an elastomer. The skin is a very extensible polymer. The different proportions of the two components make the resulting spun-bonded non-woven fabrics have very good elasticity, lower elastic modulus and higher strength and dimensional stability, which is a durable garment for spun-bonded non-woven fabrics. Offers possibilities.
Japanese Kuraray and domestic companies are jointly researching and developing ultrafine fiber spunbonded nonwovens, using Exé„„cevaltm soluble resin and PP or PE, PA, etc. for composite spinning, one component is PP (or PE, PA), and the other A combination is Excevaltm.
Excevaltm is soluble in water below 90°C. It is also biodegradable and absorbs moisture. It is hydrophilic, and it has thermal adhesiveness when compounded with PP (or PE, PA). It is very easy to be web-laid. This spun-bonded nonwoven fabric has much better water absorbency than a normal spunbonded fabric. Although its surface density is relatively small, the strength can still be comparable to conventional spunbonded fabrics and is a good candidate for durable clothing.
The spunlace non-woven fabric has the characteristics of softness, bulkiness, high hygroscopicity, and wide use of fiber raw materials. It is the most suitable non-woven fabric for clothing. Therefore, its application in durable clothing is the most studied. U.S. Patent describes a durable spunlace non-woven fabric that has good abrasion resistance and drape, is not easy to pill, and has good color fastness. When the elongation in the vertical machine direction is 50%, the recovery rate can reach 90. %, and at least 25 washes. The non-woven fabric has good elasticity and is suitable for making daily-wearing shirts and outerwears, which combines personal comfort, good mechanical strength and aesthetics. It is an ideal clothing and garment material.
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