7-layer Corrugated Cardboard Production Line

7-layer Corrugated Cardboard Production Line
3-layer Corrugated Cardboard Production Line
  • Production Speed Range: 120–200 m/min (customizable to customer requirements)
  • Maximum Paper Width Options: 1.8 m, 2.0 m, 2.2 m, 2.5 m, 2.8 m

7-Layer Corrugated Cardboard

  • Structure: Three corrugated medium layers (e.g., ABA flute) combined with four linerboard layers
  • Thickness: 7–10 mm
  • Ultra-High Strength: Edge crush resistance ≥ 7000 N/m, offering durability close to wooden crates
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7-layer Corrugated Board Production Line Configuration
7-layer Corrugated Cardboard Production Line
  • Three single facersThree single facers
  • Seven hydraulic shaftless mill roll standsSeven hydraulic shaftless mill roll stands
  • Ten preheating cylindersTen preheating cylinders
  • One double facerOne double facer
  • One triple gluing machineOne triple gluing machine
  • One thin blade slitter scorerOne thin blade slitter scorer
  • One stackerOne stacker
  • One cross cutterOne cross cutter
  • One rotary shearOne rotary shear
  • One starch preparation stationOne starch preparation station
Technical Parameters
Parameter Specification
Slitting Accuracy ±1 mm
Cross-Cutting Accuracy ±1 mm
Surface Paper 80–250 g/m2, Ring Crush Index ≥ 8 N·m/g (moisture content 8–10%)
Core Paper 80–175 g/m2, Ring Crush Index ≥ 5.5 N·m/g (moisture content 8–10%)
Inner Liner 80–250 g/m2, Ring Crush Index ≥ 6 N·m/g (moisture content 8–10%)
Flute Combinations A,B,C,D,E,F,EF,AC (customizable according to customer requirements)

Remarks: The above speed indicators are based on a production width of 1800 mm, meeting the specified paper standards, with heating components operating at a surface temperature of 175°C.

Features
  • Intelligent Control
    The new production line is equipped with IoT sensors for real-time monitoring of humidity, temperature, and tension.
  • Energy-Saving Design
    Heat pump technology replaces gas drying, reducing energy consumption by up to 30%.
  • Pre-Printing Integration
    The 7-layer corrugated cardboard production line can be integrated with high-definition printing to achieve a one-stop process from board production to finished products.
  • Tailored Configurations
    Production line setups can be customized based on product weight, transportation environment, and budget. For example, a 5- corrugated cardboard production line can be equipped with a moisture-proof coating machine or ground logistics system for enhanced performance.
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Our Products
Corrugated Cardboard Converting & Carton Box Making Machines

Corrugated production lines generally use electric heating, steam heating, liquefied gas heating, or thermal oil heating.

Food and beverage packaging requires corrugated board with moisture resistance and eco-friendly features. A 3-layer or 5-layer corrugated board is usually sufficient, with production speeds of 120–250 m/min.

Electronic products require strong protection during transportation to prevent physical damage. A 3-layer or 5-layer corrugated board with E-flute is commonly used to balance strength and cost efficiency.

Large appliances such as refrigerators and washing machines require packaging with high compression strength and shock resistance. A 7-layer corrugated board is typically recommended for this application.

For lightweight express packaging, a 3-layer corrugated board production line is most suitable. It provides short changeover times, low energy consumption, reduced material usage, and high production speeds of 120–250 m/min, supporting large-volume orders.