As is well known, the sewing process of needle felt filter bags directly affects their performance and service life. Loose stitching or uneven needle spacing can cause the filter bag to unravel under high temperature, high pressure, or prolonged operation, leading to dust leakage and potentially affecting equipment operation and causing emissions to exceed limits. This clearly shows that filter bags, as the core component of dust collectors, play a crucial role!
For this reason, Jiangsu OKAI understands the risks of substandard weaving details and meticulously refines its production process. We use high-speed three-needle six-thread sewing, hot-melt technology, and edge-binding treatment for the filter bag body, ensuring strong seams and long-term reliability.
Sewing Thread and Needle Hole Treatment Requirements
The choice of sewing thread significantly impacts the performance of needle felt filter bags. For synthetic fiber filter media, the thread should match or exceed the strength of the filter material itself, with a tensile strength greater than 27N. Glass fiber sewing threads should exceed 35N, and for inner filter bag sealing rings, the sewing thread strength should exceed 60N.
The Three Sewing Techniques of AOKAI：
For filter bags designed for ultra-low emission concentrations (less than 20mg/Nm³), we apply thin films to the needle holes to prevent dust leakage and ensure compliance with environmental standards.
Application of Hot-Melt Technology in Filter Bag Manufacturing
Hot-melt technology is a key step in the production of Jiangsu OKAI needle felt filter bags. Automatic hot-melt machines heat the sewn filter bags, tightly bonding the thread with the filter media to enhance abrasion resistance and sealing performance. Combined with edge-binding treatment, the overall strength and sealing of the filter bag are further improved.
The sewing and hot-melt processes directly influence the filtration efficiency and service life of the filter bag. Jiangsu AOKAI, through high-speed three-needle six-thread sewing, hot-melt technology, and edge-binding treatment, ensures that needle felt filter bags have high strength, excellent sealing, and reliable long-term operation. With precise production processes, carefully selected sewing threads, and advanced equipment, Jiangsu OKAI filter bags are the top choice for high-performance, durable industrial filtration systems.
