
Understanding Corrugated Board Strength Testing: ECT, BCT, FCT Explained
A practical guide to corrugated board strength testing methods, what the numbers mean, and how to specify the right board for your packaging needs.
Technical Guides

A well-planned maintenance program is essential for maximizing corrugator uptime and production quality. This guide provides a comprehensive maintenance schedule covering all major line components.
• Walk around entire line, check for unusual sounds
• Verify safety guards in place
• Check air pressure (typically 6-8 bar)
• Inspect hydraulic levels
• Check adhesive tank levels and temperature
• Inspect corrugating rolls for damage or contamination
• Check pressure roll condition
• Verify adhesive applicator roll gap
• Clean adhesive drips and buildup
• Inspect steam traps and condensate (traditional lines)
• Check belt tension and tracking
• Inspect hot plate temperature uniformity
• Verify holddown pressure settings
• Check adhesive application
• Verify adhesive viscosity (Stein-Hall cup)
• Check adhesive temperature
• Ensure adequate supply for shift
• Clean mixing equipment
• Clean adhesive from applicator rolls
• Flush adhesive lines if shutting down overnight
• Record production data and any issues
• Report maintenance needs
• Lubricate all grease points per manufacturer spec
• Check belt tensions (drives, conveyors)
• Inspect chain drives for wear
• Verify proper roller alignment
• Check bearing temperatures
• Deep clean adhesive tanks
• Inspect and clean filters
• Check pump seals and gaskets
• Calibrate viscosity measurement
• Verify temperature controls
• Check motor temperatures
• Inspect control panel for alerts
• Verify sensor operation
• Clean optical sensors
• Check emergency stop function
• Measure roll profiles for wear
• Inspect roll surfaces for damage
• Check roll alignment and parallelism
• Clean chrome surfaces
• Schedule re-grinding if needed (typically every 6-12 months)
• Inspect plate surfaces for flatness
• Check plate heating elements
• Verify temperature uniformity
• Clean any contamination
• Inspect steam connections (traditional lines)
• Check gearbox oil levels
• Inspect drive couplings
• Measure motor current draw
• Check brake function
• Verify encoder operation
• Comprehensive vibration analysis
• Thermal imaging of electrical systems
• Corrugating roll re-grinding
• Belt replacement (as needed)
• Control system software updates
• Full safety system audit
• No steam boiler maintenance
• No steam trap inspection
• No condensate system service
• Simpler hot plate systems
• Fewer failure points overall
Typical maintenance time savings: 20-30% vs. traditional steam-based lines.
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