A plastic sheet extrusion production line is an industrial manufacturing system designed to melt plastic raw materials or recycled plastic materials in an extruder and continuously extrude them through a flat die head, thereby forming plastic sheets or films of uniform thickness.
The specifications of these sheets vary widely, ranging from sub-millimeter thick films used for food packaging to heavy-duty sheets up to tens of millimeters thick used in the automotive, construction, and signage industries.
Plastic sheet extrusion production lines have a wide production range and can typically produce rigid or semi-rigid sheets of various materials with thicknesses ranging from 0.1 mm to 50 mm.
The full range of plastic sheet extrusion machine solutions and plate extrusion lines adopt professional single or twin screws designed and produced by our own factory, mature extrusion technology, special designed rolls, high-torque AC motor, imported frequency converter and stable control system, which is particularly suited for the extrusion of thermoforming sheet and has established itself in this industry. We provide full extrusion lines for PET sheet, PP PS sheet, PP meltblown non-woven fabric, reinforced plastic sheet, SPC floor, XPE, IXPE foam sheet, PVC thick plate, PP, PET, PLA, PC, PMMA, GPPS, ABS, HIPS, PVC sheet, TPO, PVC, EVA, HDPE waterproof geomembrane sheet, PEEK, PPS plate, new material composite sheet, etc.
| Single screw extruder | Twin screw extruder | |
| Principle | Friction-based drag conveying; gentle shear | Forced conveying; high-frequency shear and intense mixing |
| Venting/Drying | Requires crystallization and drying equipment | Integrated multi-stage vacuum venting; NO need for crystallization and drying |
| Material degradation | Gentle shear; minimal damage to PET material viscosity | Relatively high shear; tends to reduce material viscosity |
| Cost | Low equipment cost; simple maintenance; low operational skill requirements | Higher equipment cost; complex maintenance; high operational skill requirements |
| Energy Consumption | Crystallization and drying system has high energy consumption | lower specific energy consumption ; reduces energy consumption at least 30% |
| Material Compatibility | 80% RPET | 100% RPET; compatible with masterbatches, fillers, and modifiers |
| Application | High quality sheets for deep-draw PET cups, folding boxes, printing, etc | Fruit and salads packaging box, Daily necessities packaging |
Quality issues and solutions in plastic sheet production:
1. Thickness deviation: Monitor thickness deviation in real-time using an online thickness gauge. Control thickness fluctuations by fine-tuning the die gap and matching roller temperatures with haul-off speeds. Closed-loop control can also be implemented by linking the online thickness gauge to automatic die adjustment bolts and haul-off speed controls.
2. Transparency: Stabilize extrusion temperatures, ensure raw material purity, and prevent the formation of "fish-eyes" (gel particles). Precisely control the roll temperatures and gaps of the three-roll calender to optimize crystallinity and ensure desired transparency and haze levels.
3. Winding quality: Match tension control to production speed to avoid wrinkling and uneven winding tightness. Implement synchronized closed-loop control across the entire system, linking extrusion, haul-off, and winding parameters.
Common materials include PP, PE, PET, PS, PVC, ABS, PC, PMMA, and biodegradable plastics such as PLA, PBAT, TPS, and engineering plastics such as PEEK, PEI, PI, and PSU.
Jwell offers extrusion solutions addressing the need for customization for the majority of materials on the market.
Jwell provides customized equipment for customers. Offerings include, for example, production lines for 9-meter-wide waterproofing membranes, 50mm-thick PP/PE sheets, 0.1mm PET sheets, etc.
Single-screw extruders offer a high cost-performance ratio and are suitable for standard materials such as PP PE, featuring simple operation and easy maintenance. Twin-screw extruders provide superior mixing, venting, and processing capabilities, offering distinct advantages when handling PET, PVC, various material blends, and recycled materials.
We offer multi-layer co-extrusion sheet production lines, such as common ABS+HIPS co-extrusion and PC+PMMA co-extrusion, as well as ABA and ABC types virgin and recycled materials co-extrusion.
We offer small-scale laboratory extrusion lines with an output of 10 kg/h, as well as large-scale industrial production lines with an output of 3,000 kg/h.
Jwell maintains a stock of various small-scale extrusion lines for plastic boards, sheets, and films. You can conduct tests of your material on our pilot-scale extruders for a minimal fee.
Jwell started manufacturing screws and barrels in 1978, making it one of the earliest screw and barrel manufacturers in China. Its brand, "Jinhailuo", has become well recognized in the industry. In 1997, Jwell was established as a plastic extrusion machinery manufacturer and began the production of extrusion machinery. Today, Jwell is the vice president unit of the China Plastics Machinery Industry Association and one of the technology leaders in the extrusion machinery industry.
