Spunlaced nonwoven

The spunlace method, also known as spunlace forming, is an important non-woven processing technology. Due to the unique technology of spunlace, it is widely used in medical and sanitary products and synthetic leather fabrics, shirts, and home decoration. . Its fiber raw materials come from a wide range of sources, such as polyester, nylon, polypropylene, viscose and the like. At present, the main uses of spunlace cloth are three categories, namely, medical, human leather and wiping. The sales direction is: domestic leather spunlace is mainly for domestic sales, medical spunlace is mainly for export export, wiping clean water stabbing cloth. Exports and domestic sales each account for a portion. The current sales price is up to about 36,000 yuan / ton.

First, new technology:

1. Spunlace composite technology: The research and development of spunlace composite technology not only overcomes the limitations of some non-woven products, but also increases the variety of colors, greatly expands the application field of spunlace nonwovens, and promotes spunlace technology. And even the development and improvement of the entire nonwoven process. (1) The combined technology of spunlace and wood pulp airflow. Since the price of wood pulp is much cheaper than the short fiber commonly used in spunlace, and the fluff pulp has good moisture absorption and feel, the finished product is cheaper than the fiber-based product, and is competitive in price, but in the process. The requirements on the filtration system are very high. The product can be used as a core material for crepe (70% g/m2), diapers and sanitary napkins. The equipment for spunlace and wood pulp airlaid is Aquapulp of Fleissner and Airlace of Perfojet. (2) Composite technology of spunlace and filament spunbond web. The composite product of the method has the good absorption property of the spunbonded nonwoven fabric compared with the municipal strength and the short fiber, and is more soft than the spunbonded nonwoven fabric, has the function of absorbing water and oil absorption, and has high strength, and can be used as a food cloth. , decorative fabrics and cleaning cloths. The equipment for the combination of spunlace and spunbond is Aquqspun and Aquasplit from Flerssner. And Freudenberg's Evolon processing technology. (3) Spunlace and wet-laid composite technology. Typical Process Detex's Hydraspun technology consists of Detex's wet-laid technology combined with the Soflom spunlace method registered by Unicharm, Japan. Hyderaspun wet spunlace nonwovens have the same strength and softness as traditional dry spunlaced nonwovens, and wet spunlaced nonwovens do not remove shavings. Double the nonwoven fabric, especially suitable for the clothing field.

2. New technology for fabric finishing of spunlace: In 1995, BBA of the United States developed the Interspun process and applied for a patent. With this process, the surface of the fabric is treated by hydroentanglement, which can have a positive impact on the structure and properties of the fabric. In 1998, BBA and Fleissner signed a cooperation agreement with Fleissner as the exclusive machine supplier for this technology. Fleissner's Aquatex is a system that uses a hydroentangled head to process woven fabrics and is known as a revolutionary measure of woven fabric finishing. After the woven fabric is spunlaced, the yarn in the fabric is loosened and the fabric is effectively cleaned; depending on the arrangement of the spunlace, the effect of the peach skin can be obtained on both sides or on one side of the fabric; The stress generated by the fabric during the process makes the warp yarns more uniform, thereby improving the feel and appearance of the fabric, increasing the thickness of the fabric, making the fabric soft and soft, and the abrasion resistance is more than 300% before untreated, and the slip at the sewing place The phenomenon is more than doubled, the anti-pilling performance is improved, the wrinkle resistance is improved, the cloth surface is more uniform, the cloth surface porosity is reduced, and the distribution is more uniform, and the cotton fabric is dyed like mercerized. Therefore, after the hydroentanglement treatment, the processes of desizing, scouring, mercerizing, sanding, etc. can be eliminated, the bleaching process can be simplified, and the comprehensive economic benefits are obvious. Products are widely used in decorative fabrics, filter cloth, home textiles, clothing, automotive airbag fabrics.

3. New developments in spunlace technology: The Memis Acar study in the Department of Mechanical Engineering at Loughborough University in the United Kingdom proves that the spunlace process can process glass fibers and produce industrial fabrics. Because glass fibers are not curled, the traditional concept is that dry non-woven processes are difficult to process. . Most fiberglass nonwovens are typically processed by needle punching or wet processing, but North Carolina State University (NCSN) has successfully developed glass fiber and polyester blended spunlaced nonwovens. 16 um thick denier glass fiber is difficult to process with water puncturing. If it is mixed with 6.5 um fine denier glass fiber, it will help to improve the strength of spunlace nonwoven fabric. Therefore, glass fiber of different denier is mixed, fine fiber. Conducive to spunlace, coarse denier fiber is beneficial to improve the strength of spunlaced nonwoven fabric. If the glass fiber is mixed with textile staple fiber such as polyester, the hydroentanglement ability can be enhanced. The glass fiber reinforced plastic composite material can be produced by mixing the glass fiber with the low melting point polyester. Researchers at Aubusm University in the United States have used NGSN equipment to find that spunlace can produce soil cloth. Currently, geotextiles are produced by acupuncture and hot rolling processes. The researchers found that changing the pressure of the spunlace and the time the web was subjected to the water needle changed the pore size of the geotextile. Aperture is a key indicator of geotextiles, especially as a sand filter layer that allows water to pass through and prevent soil movement. Extending the time the web is subjected to the water needle or increasing the pressure of the spunlace can enhance the hydroentanglement effect of the web and reduce the aperture of the fabric. The aperture size can be adjusted online without stopping, which increases the production speed and is more flexible than other geotextiles.

Second, new products

The spunlace processing technology has made breakthroughs. PGI's Miratec spunlace nonwovens and Freudonberg's Evolon spunlace nonwovens are a new generation of spunlace products that can replace textiles and knitwear. The broad market prospects and development directions of the law have made the best comments, opening up a new market with great potential for spunlace technology.

PGI's Miratec fabrics are the most innovative development of spunlace nonwovens both conceptually and in performance. Time will tell people whether Miratec fabrics can open up a vast market in the field of durable textiles they target, and price may be a major factor to consider.