Why Tissue Needs Purpose-Built Air Systems

Converting and rewinding generate edge trims, log-saw cookies, and fine fibers. Uncontrolled, these cause:

• Dust build-up and fire risk in hot zones

• Lower roll quality and frequent cleaning stops

• Corrosion from wet-end mist mixing with dust

• Poor air quality for operators

Modern systems address machine/rewinder dust, wet-end mist, and hall ventilation in one strategy.

How Trim Transport Works (Step by Step)

1. Source Capture – Hoods/boxes at crêping doctor, slitters, log saws, and transfer belts (key dust sources). 

2. Pneumatic Conveying – Proper duct diameters/velocities keep light trims airborne with minimal pressure loss.

3. Separation – Cyclone or material separator drops scrap to a baler/compactor; air goes to dust filtration.

4. Filtration & Return – Cartridge/bag filters remove fine fibers before air is returned or exhausted.

5. Controls & Safety – ATEX zoning, earthing, isolation/venting, spark detection (as required).

Venturi vs. Cutter/Fan—Choosing the Right Method

• Venturi Systems

  • Pros: no moving parts in stream, simple & low-maintenance, quick install.

  • Cons: higher transport airflow, can raise fan power depending on run length. 

• Cutter/Fan Systems

  • Pros: reduced waste volume, lower kW/tonne, fewer bale changes, strong ROI in continuous duty.

  • Cons: more moving parts, higher initial cost. 

In practice: venturi shines for simpler lines and fast retrofits; cutter/fan often wins lifecycle cost for high-throughput multi-line plants.

Rewinder & Machine Dust/Mist Control

• Multi-box capture at rewinder reduces airborne fibers and improves jumbo roll quality. 

• Wet-end mist removal at the former reduces corrosion and keeps fabrics cleaner. 

Design Tips (What Really Matters)

• Maintain conveying velocity; avoid sharp elbows and long flexible runs.

• Size capture slots for web speed and trim width; avoid disturbing sheet stability.

• Balance return air temperature/humidity for comfort and energy.

• Integrate safety from the start: earthing, venting/flameless venting, isolation dampers and appropriate detection.

Case-Style Features Seen in the Market

• Central separators with baler integration and 24/7-ready, low-noise fans for tissue waste streams. 

• Energy-saving trim extraction solutions tailored to paper/tissue rewinder areas. 

• Turnkey scrap extraction for paper/corrugated/packaging plants.