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New Technology Of Spunlaced Nonwovens Production
Sep 01, 2018

Spunlaced Composite Technology

The research and development of Spunlaced Composite technology not only overcomes the limitations of some non-woven products, increases the variety of patterns, greatly broadens the application field of spunlaced nonwovens, but also promotes the development and improvement of spunlaced technology and even the whole non-wovens process. (1) Spunlaced and wood pulp airflow composite technology. Because wood pulp is much cheaper than Spunlaced staple fibers, and the hygroscopicity and feel of fluff pulp are very good, the products made from wood pulp are cheaper than those made from all staple fibers and are very competitive in price, but they require very high filtration system in technology. Products can be used as core material for 70%g/m2, diapers and sanitary napkins. Aquapulp from Fleissner and Airlace from Perfojet are equipped with a network of spunlaces and wood pulp. (2) Spunlaced and filament spinning viscose mesh composite technology. The products compounded by this method possess both better absorption properties and stronger market strength than spunbonded nonwovens and staple fibers, and are more uniform and softer than spunbonded nonwovens. It has the function of absorbing water and oil, and has higher strength. It can be used as food wrapping, decorative cloth and cleaning cloth. Spunlace and spunbond composite equipment has Flerssner's Aquqspun and Aquasplit. And Evolon processing technology of Freudenberg company. (3) spunlace and wet net forming technology. The Hydraspun technology of the typical Detex Company is composed of the wet netting technology of the Detex Company and the Solom spunlace method registered by the Unichart Company of Japan. Hyderaspun wet spunlaced nonwovens have the same strength and softness as or even more than the traditional dry spunlaced nonwovens, and the wet spunlaced nonwovens can not remove the dander, and its seam tensile strength is twice that of the dry spunlaced nonwovens, especially suitable for the clothing field.

New technology of fabric finishing function

In 1995, the US BBA company developed the Interspun process and applied for a patent. Using this process, the surface of the fabric can be treated by spunlace, which has a positive effect on the structure and properties of the fabric. In 1998, BBA signed a partnership agreement with Fleissner, the exclusive supplier of the technology. Fleissner's Aquatex is a system that uses Spunlaced heads to treat woven fabrics, known as a revolutionary measure in the finishing process of woven fabrics. The Spunlaced woven fabric can make the yarn loosen and the fabric cleaned effectively; according to the different arrangement of spunlaced heads, the peach skin effect can be obtained on both sides or one side of the fabric; and the stress produced in the process can be eliminated to make the warp yarn more uniform, so as to improve the handle and the fabric. Appearance, increase the thickness of the fabric, so that the fabric luster is soft, wear resistance is more than 300% before the treatment, slippage phenomenon at the sewing place more than doubled, anti-pilling performance is improved, wrinkle resistance is improved, fabric surface is more uniform, fabric surface porosity is reduced, distribution is more uniform, used for cotton fabric dyeing like mercerizing general. Therefore, desizing, boiling, mercerizing and grinding can be cancelled after spunlaced treatment, and the bleaching process can be simplified with obvious comprehensive economic benefits. Products are widely used in decorative cloth, filter cloth, household textiles, clothing, automobile safety airbag fabric.

Advances in Spunlaced Technology

Mies Acar, Department of Mechanical Engineering, Loughborough University, UK, has shown that Spunlaced fiberglass can be processed to produce industrial fabrics. Because the fiberglass has no crimp, the traditional idea is that dry nonwovens are difficult to process. Most fiberglass nonwovens are usually made by needle-punching or wet-spinning, but Spunlaced fiberglass and polyester blended nonwovens have been successfully developed at North Carolina State University (NCSU). Coarse denier glass fiber with diameter of 16um is difficult to be processed by spunlace method. If it is mixed with fine denier glass fiber with diameter of 6.5um, the strength of spunlaced nonwovens will be improved. Therefore, glass fiber with different sizes will be mixed, fine denier fiber will be beneficial to spunlaces, and coarse denier fiber will be beneficial to the strength of spunlaced nonwovens. If glass fiber is mixed with textile staple, such as polyester, it will enhance the spunlace entanglement ability. Mixing glass fiber with low melting point polyester can produce glassy reinforced polyester composites. Using NGSN equipment, researchers at Auburm University in the United States found that Spunlaced geotextiles can be produced by needling and hot rolling. Researchers found that changing the spur pressure and the time the fibre mesh was exposed to water needles could change the pore size of geotextiles. Pore size is a key indicator of geotextiles, especially as a sand filter, allowing water to flow through and preventing soil movement. The effect of spunlace entanglement can be enhanced and the pore size of fabric can be reduced by prolonging the time of spunlace action or increasing spunlace pressure. The hole size can be adjusted on-line without stopping, thus improving the production speed, more flexible and simple than other geotextile processing technology.