PP Strapping Band Extrusion Line – Precise Tension

Tension control is a critical factor affecting thickness uniformity and final winding quality in PP strapping production. This production line features a multi-stage haul-off system consisting of a low-speed three-roller haul-off unit (0-40 m/min, 5.5KW) and a high-speed five-roller haul-off unit (0-250 m/min, 15KW). The low-speed unit stabilizes the nascent tape after extrusion, while the high-speed units provide precise tension adjustment after stretching and setting. Multi-stage haul-off combined with closed-loop speed control (accuracy ±1 m/min) ensures constant, fluctuation-free tension across all sections. Rollers are chrome-plated and polished with HRC58-60 hardness, wear-resistant and non-damaging to the tape.

• Multi-stage haul-off: Low-speed + high-speed combination covers full-line tension control
• Low-speed unit: Gentle traction of nascent tape prevents stretching deformation
• High-speed units: Precise tension control after stretching and setting
• Speed accuracy: ±1 m/min for full-line closed-loop synchronization
• Chrome-plated rollers: HRC58-60 hardness, wear-resistant and non-damaging
• Stable tension: Multi-stage traction eliminates cumulative tension fluctuations
• Fast response: Inverter/servo drives for instant tension adjustment
• Reduced scrap: Stable tension ensures uniform thickness, reducing dimensional rejections
• High-speed compatible: High-speed units support 250 m/min line speed
• Quality enhancement: Constant tension ensures consistent product performance