PETG film extrusion line

China GWELL as China Plastic Extruder Supplier, PETG film extrusion line adopts multi-machine co-extrusion technology to produce multi-layer co-extruded composite PET sheets such as APET/PETG, PETG/APET/PETG, APET PETG CPET Sheet Extrusion Line, etc., which are widely used in blister suction Plastic, printing, hardware bags, gift folding boxes, etc.

• Equipped with the precision distributor, the layer is uniform, and the proportion of each layer is adjustable for digital display.
• Inclined horizontal tablet structure makes operation and maintenance more convenient.
• The roller is driven independently, the linear speed is synchronized with the extruder speed, closed-loop control, and full servo system.
• PETG film extrusion line is controlled by Siemens PLC to realize the automatic control of parameter setting, data operation, feedback, alarm, and other functions.
• The operation procedure and control system are independently written by Gwell.

PETG film extrusion line Process Flows

Extruder —- Screen changer —– Melt pump —– T-die —— Calender —– Thickness Scanner —-Cooling Bracket —-Cutting Knife —- Haul-off —-Winder

PETG film produced from PETG sheets is a new type of high-tech building decoration material. Its high-quality characteristics completely solve many defects in the process of traditional materials in the process of processing and use, and can better reflect energy conservation, environmental protection, innovation and guidance. A low-carbon living environment is a truly green and environmentally friendly product. The products produced by China GWELL are now widely used in developed countries such as Europe, the United States, Japan and South Korea, and lead the fashion trend of the international architectural decoration industry, and are favored by professional designers and consumers.

PETG film Extrusion Line process

• Raw material conveying: compressed air or roots fan is used to pneumatic conveying to the designated silo.
• Silo: Store raw material slices and enter the weightless metering device through the raw material’s gravity.
• Weightlessness measurement: Weightlessness scale is used to measure and feed to achieve accurate control of unloading quantity and ensure stable uniformity of feeding of PETG film Extrusion Line.
• Feeding: Screw feeding is adopted to ensure uniform and continuous feeding.
• Metal detection separator: Detects and separates metal impurities in raw material slices and recycled materials to ensure the purity of raw materials.
• Extrusion: A vacuum exhaust twin-screw extruder is adopted to help reduce the degradation of melt raw materials and the generation of bubbles; the temperature range is 240-285℃.
• Coarse-filter: Disc filter is adopted to increase the filtration area of PETG film extrusion line and reduce replacement frequency, improve production efficiency, the filter aperture is larger than the fine filter.
• Melt metering pump: The double gear metering pump is adopted to achieve proper melt extrusion amount and ensure uniform melt flow and pressure stability.
• Fine filtration: using disc filter to increase filtration area, reduce replacement frequency, improve production efficiency, and filter aperture 25-40um.
• Static mixing (adapter): China GWELL PETG film extrusion line is multi-layer co-extrusion, which makes the melt mix more uniform and flow into the die more stably.
• Die: Using thermal expansion bolts to automatically or manually adjust the T-die lip clearance through the thickness gauge feedback information, can get better PET-G thick sheet with uniform thickness, and the die temperature is 260-285℃.

• Electrostatic adsorption: Using steel strip type electrostatic adsorption tape, the casting sheet flowing out of the die by high voltage electrostatic is flat and tightly adsorbed on the surface of the hand drum, and by increasing the exhaust above the dice, to reduce the condensation of volatiles and oligomers in the melt around the die.
• Casting: The process of cooling the cold drum through the temperature control unit, the temperature is 25-30℃, the melt flows out through the melt pipe through the die lip under the pressure of the metering pump, and then cooled by the rotating cold drum to form a solid sheet.
• Infrared thickness gauge: infrared thickness measuring system equipment is used to measure and control the thickness of the thick sheet.
• Auxiliary winding: the cast sheet from the die, hard drum, after thickness gauge detection, judged to be wrong (uneven thickness, edge serpentine, bubbles, impurities, holes, surface protrusions, surface particles or oligomers, unmelted particles, surface drawing, etc.), crushing and re-granulating after auxiliary winding.
• China GWELL petg film extrusion line Longitudinal stretching: preheating, stretching, shaping and cooling four sections, each section is distributed with a different number of rollers, roller driven by inverter motor, can control and adjust the longitudinal tensile ratio according to the production process, roller temperature is heated or cooled through the temperature control unit, different sections set different temperatures according to the production process, longitudinal stretch ratio: 1.05-3.0 times, temperature range: preheating, stretching, stereotyped 70- 90℃; cooling 30-50℃.
• Infrared heating: one or two sets of infrared heating pipes are used to control the heating of thick sheets up, down or left and right, the heating device is installed in the stretching section, and the cooling system is attached.
• Transverse stretching: divided into four sections: preheating, stretching, shaping and cooling; each team has different temperatures, 75-100℃, tensile ratio 3-4.5 times trimming: remove thick edges and waste edges that are not stretched and unevenly stretched.
• Corona treatment: increase film surface tension to facilitate the printing of PETG film extrusion line products and subsequent film finishing
• Rewinding: Trimmed and a winder rolls corona treated film into a large, wide and large diameter master roll.
• Aging treatment: The process of placing the large mother roll on the steel core bracket of the mother coil and eliminating the stress in the film after 24 hours of static aging.
• slitting: Through the unwinding machine, the large width and large diameter master roll are cut into small film rolls of the width and length required by the order, convenient for transportation and subsequent printing processing.
• Packaging: Weigh and label the small film role, pack it into the packing carton, affix the certificate of conformity, put it on the pallet, wrap the film for sealing and other operations.

PETG film Extrusion Line Features

1. The unique cross-flow channel and thin-wall design of the PETG sheet machine, the temperature and flow rate of the cooling water are controlled by PLC to keep the temperature of the roll surface uniform, and the temperature difference of the roll surface is controlled by 1°C. Inside, the cooling effect is better and the product quality is more stable, because it solves the problems of the rollers designed in the past, and can increase the output:
2. The opening of the die lip is automatically controlled and adjusted by the thickness gauge according to the feedback signal of the film uniformity. The die head is divided into several different heating zones. The unique heating control technology can control the die head more effectively and accurately. temperature in each zone. Multi-layer co-extrusion automatic flat die head, with thickness gauge feedback adjustment, to ensure the thickness uniformity of the film and decorative film, the product thickness error is within ±3%;
3. The PETG sheet machine is equipped with high-precision tension measuring rollers and winding tension floating rollers to achieve high-sensitivity and high-precision control of tension control and ensure the internal and external consistency of winding tension. The intuitive man-machine interface can be set, modified, programmed and fine-tuned at any time, which is very convenient. The winding diameter can reach 1200mm, which reduces the number of roll changes, saves space for finished products, reduces the workload of workers, and improves work efficiency.
4. China PETG sheet machine edge material recycling system, high-efficiency crushing and air supply pipeline system, cyclone separation dust removal device and central forced crushing feeding system, save raw material costs for customers, and the finished product rate reaches 95%

PETG film Extrusion Line product features

1. Environmental affinity: non-toxic, pollution-free, recyclable and degradable, is an excellent green and environmentally friendly material;
2. Variety of China PETG Film Extrusion Line: There are many kinds of colors and patterns, which perfectly reflect nature, elegance and fashion;
3. Chemical stability: no cracking, no discoloration, not easy to fold, no whitening when bending, good toughness;
4. Durability of protection: wear resistance, scratch resistance, moisture resistance, corrosion resistance, high and low-temperature resistance, easy decontamination, etc., to achieve the effect of protection as new and long service life;
5.  Barrier tightness: the gas permeability is almost zero, which can effectively block toxic gases (such as formaldehyde, benzene, dioxins, etc.) released by various adhesives, coatings, adhesives and other materials;
6.  Excellent flame retardancy: after special flame retardant treatment, excellent fire resistance performance, entirely in line with the international fire protection standards in the industry;
7. High efficiency and energy saving: The PETG film extrusion line is easy to operate and effectively solves the difficult problems of energy waste and environmental pollution caused by traditional processes (electroplating, painting, etc.).

Uses: Mainly used to decorate the surface of building materials such as panels, metal, glass, aluminum profiles, etc., widely used in high-grade furniture, home appliances, cabinets, wardrobes, doors, ceilings, interior, and exterior wall decoration, elevator envelopes and other industries.