Acupuncture technology plays a significant role in the nonwoven fabric production line, accounting for approximately 28% to 30% of the industry. Currently, China's production capacity has reached nearly 300,000 tons. At the sixth National Acupuncture Nonwoven Production Technology and Application Exchange held in Changshu, Jiangsu Province, in December 2009, the reporter was impressed by the promising future of this sector. Industry insiders noted that, beyond traditional applications like air filtration and dust control, new areas are continuously emerging, including transportation, industrial wiping, and more. Virtually any combination of nonwoven processes or fiber types is now possible, making acupuncture nonwovens ideal for specialized and demanding applications.
The process of composite application involving polyester spunbond and needle-punched nonwovens offers high production speed, low raw material consumption, energy efficiency, compact equipment design, and a small footprint. In recent years, this technology has gradually replaced staple fiber geotextiles. According to application departments, polyester spunbond needle-punched geotextiles provide excellent strength, reinforcement, isolation, filtration, drainage, and seepage control functions, making them widely applicable in water conservancy, road construction, and building waterproofing projects. They are considered a preferred geosynthetic material by users.
Needle-punched nonwoven filter materials have seen significant improvements through innovative spunbond acupuncture technology. This method produces thicker, less dense fabrics with good air permeability and dust-holding capacity. However, due to user feedback regarding insufficient filtering accuracy, manufacturers have been actively improving the technology by using finer fibers, heterofibers, and specialized needles to enhance filtration performance.
In response to market demands, companies such as Foshan City’s Sri Lankan Special Materials Co., Ltd. have taken multiple approaches to improve competitiveness. These include using recycled bottles as raw materials to reduce costs, enhancing drafting techniques to lower energy consumption, and leveraging the advantages of spunbond technology to boost product performance.
Nanjing Jihua 3521 Special Equipment Co., Ltd. has developed a high-temperature filter material using an acupuncture-spunlace composite process. Unlike traditional needle-punched filters, which cause up to 25% fiber damage, the spunlace method causes only about 5% damage, significantly increasing tensile strength and making the longitudinal and transverse strengths closer. This technology also overcomes mechanical strength limitations caused by cut filaments during the needle-punching process, improving both filtration efficiency and precision.
Currently, high-performance fibers used in high-temperature filtration products mainly include glass fiber, Nomex, P84, PPS, and PETT. Each has its own limitations—glass fiber is brittle, Nomex lacks oxidation resistance, P84 is prone to hydrolysis, and PPS operates at lower temperatures. While PETT offers excellent chemical resistance and high-temperature performance, it is costly and does not always offer a clear advantage over other fibers. To address this, some enterprises have started blending ultra-fine glass fiber into PETT, maintaining temperature resistance while improving filtration efficiency and reducing costs, thus expanding the range of applications and extending service life.
At the exchange meeting, the reporter met with several PETT producers who expressed strong confidence in the material’s potential. The key challenge now is how to expand market reach and increase sales.
New fiber composites are also transforming the nonwoven leather fabric industry, aligning with the trend toward high-performance, eco-friendly, and functional synthetic leathers. Over the past two years, the use of ultrafine fibers has significantly boosted the synthetic leather market, enabling features like water resistance, breathability, antibacterial properties, and deodorization. Tempered and surface-modified fibers have further enhanced the quality of nonwoven leather, helping it enter the high-end synthetic leather market.
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