Suzhou Forest Independently Developed Needle-Punched Production Line: Defining High-Performance Felt Manufacturing with Precision Equipment

In the field of nonwoven materials, equipment performance often determines the ceiling of product quality. Suzhou Forest has adhered to independent research and development for many years, creating a complete system of needle-punched felt production equipment. All core equipment is independently designed and continuously iteratively optimized based on product requirements.

Walking into the production workshop, the entire production line is centered around needle punching reinforcement, equipped with upstream and downstream equipment units including raw material handling, web formation, multi-needle punching, fabric accumulator buffering, heat setting, and post-treatment. These units work in coordination to collectively define the quality standards of high-performance felt.

The production line starts with an automatic opening and blending unit and a mixing machine, which, through multiple opening rollers and blending chambers, ensure thorough mixing of different fibers, laying the foundation for subsequent processing. In the web formation stage, a double-doffer carding machine works in tandem with a cross-lapper to open the fibers into a single-fiber state and lay them into a uniform batt, with a maximum width of up to 3.6 meters.

Needle punching is the critical process in felt formation. A pre-needle punch initially shapes the loose batt, followed by 3 to 8 main needle punches configured according to product requirements. Each needle punch is equipped with an independent variable frequency drive system, allowing independent adjustment of needling frequency and output speed; the configuration of needling from both top and bottom achieves balanced reinforcement on both sides. After multiple needling stages, the fibers are fully entangled, and the felt acquires basic strength and density.

Between the needle punching machines and the downstream oven, the fabric accumulator serves as the key linking equipment. It dynamically stores or releases felt through a floating accumulator mechanism, absorbing speed differences between upstream and downstream sections; a pneumatic tension control system maintains constant output tension, ensuring the felt enters subsequent processes smoothly. Meanwhile, the felt naturally releases some internal stress during the hanging process, preparing it for subsequent heat setting.

The combination of the heat setting oven and the downstream needle punch is the most critical section of the production line. The oven features multi-zone independent control, with hot air penetration circulation ensuring uniform heating and a temperature control accuracy of up to ±1°C. At precisely controlled temperatures, fiber molecular chains rearrange, internal stress is released, and the form is permanently fixed. After heat setting, the felt maintains stable dimensions and exhibits a crisp hand feel. The immediately following downstream needle punch adopts a shallow needling configuration to modify the surface, making the product smoother and denser.

At the end of the production line, an ironing and calendering machine and an edge trimming and winding machine are configured for surface treatment and winding of the felt, with a maximum roll diameter of up to 1200mm. The entire production line is centrally controlled from a main control console, with an online detection system monitoring product quality in real time. Data is fed back to the control system, enabling automatic adjustment of process parameters.

By adjusting the three core parameters—raw material ratio, needling density, and oven temperature—Suzhou Forest can precisely control the final softness and hardness of the felt to meet the requirements of different application scenarios. This flexibility and precision in process control are the core competitive advantages brought by independently developed equipment. In the future, the company will continue to deepen intelligent manufacturing and green manufacturing, providing more valuable explorations for the nonwoven materials industry.