28/06/2026
PP Blown Film Machine for Stationery Folders | Sheet Protector & Inner Leaf Film Production Line
This high-performance blown film extrusion line is exclusively engineered for polypropylene (PP) resin, serving the production of office stationery folders, sheet protectors, and inner leaf inserts. The system delivers precision film forming and continuous high-throughput operation, meeting international standards in film thickness uniformity, optical clarity, stiffness, and roll winding neatness.
Servo Drive & Speed Control: Equipped with a full-digital AC servo motor and precision gearbox, combined with a 6-speed ratio adjustment mechanism, enabling stepless speed regulation from 0 to 80 m/min. It adapts to film gauges from 0.02 to 0.08 mm, ensuring stable melt pressure and consistent extrusion output.
Intelligent HMI & PLC: Features an industrial PLC with a color touchscreen interface, supporting recipe storage, historical data trending, remote diagnostics, and fault self-diagnosis. One‑touch recipe changeover between Sheet Protector and Inner Leaf modes reduces changeover time by up to 50%.
Rotating Die & Annealing Oven: A 360° continuous rotating die head (thickness tolerance ≤ ±8%) eliminates weld lines and gauge bands. An integrated hot-air circulation annealing oven with PID zone temperature control provides gradient annealing, enhancing film flatness and dimensional thermal stability – ideal for subsequent slitting and punching operations.
Water-Ring Cooling System: Comes with interchangeable 470 mm and 450 mm water rings (quick‑swap design). The labyrinth flow channel ensures uniform bubble cooling, delivering high tensile strength and glossy surface finish. A constant‑temperature circulation pump adapts to varying workshop ambient conditions.
Four‑Station Constant‑Tension Winding: Each station features an independent closed‑loop tension sensor and servo dancer roll, automatically compensating for diameter growth. Maximum roll diameter 750 mm with neat edges and uniform tightness, suitable for unattended continuous operation.
Safety Systems: The electrical cabinet includes an automatic fire suppression unit (thermal/smoke dual‑trigger), plus overload, short‑circuit, phase‑loss, and leakage protection. Equipped with emergency pull‑cords and safety light curtains, fully compliant with CE standards.
This model is the preferred choice for producing transparent high‑gloss sheet protector film and matte/frosted inner leaf film. With yield rates ≥98% and energy savings of 15% compared to similar machines, it has earned strong recognition from global clients – your cost‑effective solution for expanding into the office stationery film market.
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