Core differences between PC polycarbonate transparent corrugated sheet line and PP line: PC is highly hygroscopic, must be equipped with high-precision dehumidifying drying system; 3-roll calender adopts rapid cooling to guarantee transparency; mainly adopts hot paired roll forming, conical twin screw for PVC is not applicable.
PC Corrugated Sheet Production Line
Complete Production Flow
Virgin PC Pellets → Dehumidifying Dryer → Loss-in-Weight Automatic Feeder
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Single Screw Extruder → Double-Station Hydraulic Screen Changer (Melt Pump Optional)
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T-Type Coat Hanger Die → 3-Roll Rapid Cooling Calender (Temperature Tolerance ±1℃)
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Infrared/Hot Air Secondary Sheet Preheating (Heat above glass transition temperature) → Upper & Lower Paired Corrugated Forming Rolls
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Multi-Section Forced Air Cooling Oven → Double-Knife Edge Trimming & Edge Material Crushing Recycling → Caterpillar Haul-off Machine
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Servo Flying Saw Cut-off → Automatic Stacking Platform → Finished PC Transparent Corrugated Sheets
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Core Equipment Technical Details：
Standard Technical Parameters of PC Corrugated Sheets：
Core Differences Between PC Line & PP/PVC Line
Mandatory Drying Requirement: PC strongly absorbs moisture from air, insufficient dehumidifying drying causes poor light transmittance, bubbles & silver streaks; PP only needs ordinary hot air drying without dew point control
3-Roll Process Difference: PC adopts rapid cooling shaping to lock transparent amorphous structure; PP 3-roll focuses on heat preservation pre-cooling, sheets need secondary heating before forming
Exclusive Temperature Process: PC owns unique 4-section temperature control: rapid cooling → secondary heating → roll forming → deep cooling; PP has no secondary reheating procedure
Weather Resistance Treatment Requirement: Outdoor PC sheets must be equipped with UV protective layer to avoid long-term yellowing; PP only needs simple UV stabilizer addition
Recycled Material Control: Repeated recycling of PC leads to molecular degradation, greatly reducing light transmittance & impact resistance, mixing ratio strictly limited; PP has better compatibility with recycled scraps
Screw Selection: PC & PP uniformly adopt single screw extruder; PVC corrugated sheets use special conical twin screw, cannot be mixed used
Model 1050 PC Corrugated Sheet Line Specification (Deerma Machinery)
Complete Equipment Composition
SJ120 Main Single Screw Extruder, SJ50 UV Co-extrusion Auxiliary Extruder, Melt Distributor, Double-Station Hydraulic Screen Changer, Melt Metering Pump, Wide Flat Extrusion Die, 3-Roll Calender, Water Temperature Constant Control System, Sheet Preheating Oven, Profiled 3-Roll Forming Machine, Cooling Support Frame, Longitudinal Trimming Cutting Device, Servo Cross Cutter, Special Profiled Haul-off Machine for Corrugated Sheets, Double-Station Upper & Lower Film Laminator, Complete Automatic Electrical Control System.
