nanofibers have various definitions, but most industry experts define fibers with a diameter of less than 1 micron as nanofibers. Experts also believe that these fibers can be smaller according to different production processes of non-woven fabric industry. At present, the most advanced technology can spin fibers with a diameter of nearly 10 nanometers, but basically the most common is fibers with a diameter between 75 and 100 nanometers
so far, the application scope of nanofiber technology in the non-woven fabric industry is mostly limited to filter materials and some biomedical, sound insulation materials and energy reserves, but researchers familiar with this technology believe that the application of this technology has infinite possibilities
"at present, we are trying to drive the whole industry to meet the needs of new technologies with fast operation speed, friendly interface, simple operation and experimental methods that can meet different materials, such as nanofibers, and use them in various existing applications," said Mr. anthonyfabricante, President of nonovenstechnologies, "This technology can be used in any non-woven application field. There are too many different areas. We dare not call ourselves experts, but we are willing to provide the cornerstone. Once we launch this technology, its development will be infinite."
fabricante has been studying how to apply nanofibers to melt blown non-woven fabrics for many years, and has recently made a major breakthrough in the technology of how to produce a large number of melt blown nanofibers from polypropylene and polyester. Last year NTI and arthurg. Russell (agr) signed a license agreement for the use of its patented technology for the high-speed production of melt blown nanofibers. According to Mr. fabriccante, the combination of NTI's breakthrough in high-speed production of melt blown nanofibers and agr's more than 60 years of experience in automatic machinery production makes them occupy a very unique position in the industry
this new production technology can increase the production of non-woven fabrics in each standard commercial spinneret by about 20%. The number of spinnerets per linear inch of this fiber is higher than that of other competitive fibers, and these spinnerets are as small as 0.002 inch. Decision makers hope to produce a production line of one to three meters and 500 meters per minute to produce this material, which will be used in the fields of insulation, geotextile and hot melt. Other application fields will also include biological fibers, two-component fibers, spunbonded technology and hydraulic/air entanglementMr. fabricante said that recently, the University of Tennessee has successfully conducted experiments on melt blown nanofibers, and agr is also developing its four row spinneret device, which is composed of 15 inches wide in each row. Once completed, this culminating device will be only 24 inches long
the technology of NTI company is only one of many processes for producing superfine fiber non-woven fabrics. These non-woven fabrics are widely used in fields that need impermeability and high-efficiency surface, including special melt blowing, electrostatic spinning, electrostatic blowing and forkable fiber production. At present, microfiber has been in a stable position in the technology of melt blown and wet forming micro glass. The next step is to include fibers with smaller diameters and even nanofibers
elmarco in the Czech Republic is a leading company in the nanotechnology industry for a long time. The industrial grade standard equipment provided by the company can produce a large number of efficient, reliable and low-cost nanofibers from organic polymers, biopolymers and non organic materials. Or use a flat collet to hold a large sample. "Nanofibers are the most well-developed and well-defined nanomaterials that can bring significant value-added to products." Mr. ladislavmares, the executive president of the company, said, "among them, their most perfect applications are air filtration products and biomedical materials for wounds, but many other applications have also reached the final experimental stage."
elmarco has signed cooperation agreements with private industry and academia, so that they can promote their technology to the new field of non-woven fabric industry. "Basically, the non-woven fabric industry plays a leading role in our business plan," said Mr. stanislavpetrik, President of decision making and development of elmarco. "The market demand for the equipment we produce is very huge."
the advantages of nanofibers are numerous. They enable roller material manufacturers to produce light and strong materials, and these materials also have good air permeability, humidity core, material drape and opacity. Their limitations are mostly related to the cost demand and the number of manufacturers with production capacity, rather than the nanofiber non-woven material itself. Thanks to the increasing performance, nanofiber non-woven materials have been increasingly used to replace traditional textile materials, although their prices are not necessarily cheap
in terms of filtration, microfiber and nanofiber materials are used to capture benign particles while ensuring the efficient fluidity of cloth. However, in addition to their functional advantages, they failed to achieve the best performance in terms of simple operation requirements in the production process. Although it is one of the earliest non-woven industrial technologies, the wet forming process can provide the flexibility required to produce media materials containing microfiber materials
the latest example of using wet forming process to produce microfiber non-woven materials is dis of Ahlstrom company. The goal of this project is "Build and test whether the space structure is suitable for spacecraft to use rupto technology. They use micro glass and nano bauxite. This technology is an index08 award winner. The company's nanofiber based filter media material combines electronic and mechanical capture. Its main advantages include low pressure drop, high loading capacity and high-quality filtration efficiency.
ahlstrom's vice president of liquid filter material sales Mr. jeromebarrillon said that nanotechnology has enabled manufacturers of filter media materials to innovate technologies that they have not broken through for a long time
"in the filtration process, one of the strengths of nanofiber materials is that they can improve efficiency, capacity and pressure drop at the same time, which has been standing still for decades. In this way, the efficiency must be reliably grounded and improved without sacrificing other aspects."
in addition to disruptor technology, Ahlstrom also has the ability to produce electrospun nanofibers in North America. Mr. balllon believes that for customers, the key to how to apply nanotechnology to products is to pay full attention to all intellectual property rights in the industry. "From the perspective of knowledge industry, our company is transparent and free, but to produce such products, many processes are now closely protected by patents. Manufacturers must be careful to maintain freedom and transparency and not infringe the patents of other companies."
another interesting nanofiber is the nanofiber made by Hollingsworth & Vose using hvision platform technology. These media materials are porous structural materials with unprecedented controllability and durability. With this technology, the diameter and thickness of fibers can be adjusted to achieve high performance in a wide range of applications. Multifunctional nano media materials can be used for any non-woven coating, including glass, cellulose, synthetic fibers, or as a matrix alone. In terms of air filtration media materials, nano media improves the performance of removing particles from air vapor; In terms of liquid filter media materials, nano is designed to meet the strict standards of many liquid applications. In addition to filtration, the porous structure manufactured by H & V's nanotechnology is very light and has a high-performance surface, so it is the best choice for making heat and sound insulation materials, anti allergy bedding, waterproof and breathable fabrics and energy reserves
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