The Pain Point of Traditional Bag Making Processes: Material Waste Has Long Troubled the Industry
In the non-woven bag manufacturing industry, material costs typically account for 60%–70% of total production costs. In traditional bag making machines, to ensure sealing strength, a margin of approximately 20mm is typically reserved at the edge during the sealing process. This margin is eventually trimmed and discarded, resulting in unavoidable material loss.
For a medium-sized bag manufacturing plant producing 100,000 shopping bags per day, the annual material waste from edge trimmings alone amounts to several tons of non-woven fabric. Against a backdrop of fluctuating raw material prices, this waste directly erodes profit margins.
Zhengxin Machinery's R&D Team Overcomes Technical Challenges
After continuous R&D efforts, Zhengxin Machinery's engineering team successfully developed a new generation of waste-free edge sealing technology. This technology optimizes the coordination between the folding and heat-sealing components, precisely overlapping the two ends of the non-woven fabric and directly heat-sealing them in place — fundamentally eliminating the material waste caused by the traditional "seal first, trim later" process.
Technical Parameter Comparison
| Parameter | Traditional Process | Waste-Free Edge Process |
|---|---|---|
| Sealing Width | 20mm | 8–10mm (Ultrasonic Welding) |
| Material Utilization Rate | Approx. 90–95% | Approx. 99% |
| Per-Bag Fabric Cost | Baseline | 5% Reduction |
The new technology reduces the sealing width from the traditional 20mm to 8–10mm, increasing material utilization to over 99%. For a factory producing 30 million shopping bags annually, this translates to savings of hundreds of thousands of yuan in fabric material costs alone.
Dual Technical Approaches for Different Needs
Zhengxin Machinery's waste-free edge technology offers two process options: ultrasonic welding (8mm sealing width) and magnetic suspension welding (9–10mm sealing width). Ultrasonic welding is suitable for standard non-woven materials, offering fast welding speeds and smooth seams; magnetic suspension welding is ideal for applications requiring higher sealing strength, delivering more uniform welding and greater stability.
Both approaches achieve the core goal of "waste-free edges," allowing customers to choose the optimal solution based on their product positioning and material characteristics.
Continuous Innovation Drives Industry Progress
As one of the primary drafters of the industry standard for non-woven bag making machines, Zhengxin Machinery is committed to driving industry progress through continuous technological innovation. The successful development of waste-free edge sealing technology not only creates tangible economic value for customers but also provides a new technical pathway for the green and efficient development of the entire non-woven bag manufacturing industry.
