PP PS Sheet Extrusion Line

Currently in the plastics extrusion market, single-screw configurations remain the predominant choice for PP/PS sheet production lines, offering significantly lower equipment costs compared to twin-screw models. As a leading Chinese extrusion machinery manufacturer, GWELL's single-screw PP/PS sheet extrusion line delivers consistent feeding performance across different material formulations while maintaining superior plasticizing capabilities. This optimized processing ensures both sheet durability and dimensional stability, effectively preventing common post-production issues such as thermal forming fractures and pigment dispersion irregularities in finished products.

In China's PP/PS sheet extrusion line sector, twin-screw systems represent a technologically advanced alternative to single-screw configurations, delivering enhanced processing performance despite the higher initial investment. The twin-screw design features a modular screw configuration that provides exceptional material adaptability while maintaining precise, stable feeding dynamics. Its intermeshing geometry enables intensive distributive mixing within the processing chamber, achieving homogeneous melt formation that translates to enhanced product uniformity and surface integrity. Though requiring greater capital expenditure, this architecture proves economically viable for manufacturers prioritizing production efficiency, repeatable quality, and reduced material waste – advantages particularly critical for demanding industrial applications.

PP/PS sheet extrusion line is common for single-extruder single-layer sheet extrusion line and double-extruder co-extrusion three-layer sheet extrusion line. There is also a multi-extruder co-extrusion multi-layer extrusion line, which can process 7-9 layers of the composite sheet at most, such as a high-barrier EVOH multi-layer co-extrusion extrusion line. This type of extrusion line can process PP, PS, PE, and other polyolefin materials.

Introduction of PP PS sheet extrusion line

PP sheet

PP sheet is made of PP (polypropylene) resin through extrusion, calendering, trimming and other processes.

PP sheet is known for its lightweight properties, as well as its bright and stable surface. It also boasts good heat resistance and high mechanical strength, making it a versatile material for various applications. Additionally, PP sheet exhibits excellent chemical stability, electrical insulation, and non-toxicity, making it a safe choice for consumer products. With the ability to be thermoformed, PP sheet can be transformed into a wide range of products, including drinking cups, food boxes, and other daily necessities. Its versatility and durability make it a popular choice in the packaging industry and beyond.

PS table

PS (polystyrene) sheet is a cutting-edge environmentally friendly packaging material that has been innovated in recent years. Its exceptional thermoforming capabilities, top-notch protective qualities, eco-friendly attributes, and hygienic features make it a top choice for blister packaging in various industries, including medicine, food, toys, electronics, and clothing. PS sheets are not only versatile but also contribute to reducing environmental impact, making them a preferred option for businesses striving to adopt sustainable practices. The adaptability and resilience of PS sheets have made them an essential component in the packaging industry, catering to the diverse needs of different products without compromising on quality or performance. As consumer awareness of environmental issues continues to grow, the demand for PS sheets is expected to rise, further solidifying their position as a go-to packaging solution for a wide range of applications. With its numerous advantages and positive impact on the environment, PS sheet is set to revolutionize the packaging industry and set new standards for sustainability and efficiency.

main feature:

• Low static electricity generation, suitable for packaging products with low static electricity requirements.
• Easy to vacuum form, the product has good impact resistance.
• It has good hygienic properties and can come into direct contact with food without harm or benefit.
• Easy to color, can be made into different colors of materials, produced into different colors of vacuum cover.
• Good hardness, this kind of plate is better than other plates of the same thickness. Thermoformed cups can be used as hot and cold beverage cups.
• PP PS sheet extrusion line products meet environmental protection requirements and can be recycled. When its waste is incinerated, it will not produce harmful substances that harm the environment.

PP PS Sheet Extrusion Line Process Flows

Extruder —- Screen changer —– Melt pump —– T-die —— Calender —– Cooling bracket —– Haul-off—- Winder

Gwell PP PS sheet extrusion line

Multi-extruder co-extrusion technology is widely utilized in the production of multi-layer co-extrusion composite PP and PS sheets. This innovative technology enables the creation of various multi-layer structures such as ABA, ABCBA, ABCDCBA, and more. These multi-layer sheets find extensive applications in heat forming, printing, hardware packaging, electronic tray manufacturing, flocking processes, food packaging, clothing industry, tool fabrication, toy manufacturing, stationery production, decorative pieces, and many other industries and sectors. The versatility and efficiency of multi-extruder co-extrusion technology have made it an indispensable tool in modern manufacturing processes.

• equipped with the precise distributor, evenly layered, the adjustable proportion of each layer, digital precise control.
• inclined horizontal structure, easy to operate and maintain.
• roller independent power, linear speed, and extruder speed synchronous closed-loop control.
• the whole machine adopts PLC control to realize automatic control of parameter setting, data operation, feedback, alarm, and other functions.
• Gwell independently wrote the electronic control operating system.
• PP PS sheet extrusion line screw adopts specially designed mixing and plasticizing function.
•  Hanger type die head, double throttle valve design, can accurately adjust the thickness of the plate.
• Sheet thickness is adjusted by screw and pressing roller.
• Separating roller temperature control system to make the thickness of the plate uniform.
• PP PS sheet extrusion line winder adopts large torque motor to adjust speed and tension.
• Automatic measuring device can preset product length.

PP PS sheet extrusion line main components

• Single extruder
• Screen changer
• Melt pump
• Three-roll calender
• Cooling conveyor
• Trimming unit
• Crimping machine
• Take off
• Winding machine

Type of extrusion

PP PS sheet single-screw venting or not extrusion line

There are two kinds of PP/PS single-screw extrusion line venting or not.

One of the keys that finished sheet crystal point has or not is moisture content. Extrusion line with venting+drying, venting or both not, Moisture content ranking will be venting+drying<venting<both not.

Choose which type of single-screw extrusion line, which the important point is the raw material moisture. China Gwell needs customer requirements, finished product net width、thickness、output capacity, etc and conditions, used raw material、factory condition, so that design for our customers.

PP PS sheet twin-crew venting extrusion line

Twin-screw extruder is more suitable for kinds of raw material, no matter what the form of materials. So if customers doesn’t make sure the type of the raw material or later want to change different types of the PP/PS raw material.

We will introduce the twin-screw PP/PS sheet extrusion line. And moreover, China Gwell

GWELL as China Plastic Extruder manufacturer designed the twin-screw extruder that has the advantages of lower power and high capacity. It can improve the profit for customers.

Extrusion type

Mono extruded to make a single-layer PP/PS sheet is a straightforward and standard process. This type of sheet is commonly used in various industries for packaging, insulation, and other applications. Gwell, a leading manufacturer in the field, ensures that the specification of the sheet is tailored to the specific requirements of the raw materials used. By carefully selecting the right materials and controlling the extrusion process, Gwell is able to produce high-quality PP/PS sheets that meet the needs of their customers. Whether it's for food packaging, construction materials, or other applications, Gwell's expertise in extrusion technology guarantees reliable and durable products that perform consistently. Trust Gwell for all your PP/PS sheet needs and experience the difference that quality and precision can make.

Co-extruded to make a Three-layer pet sheet or multi-layer PP/PS sheet, like the three-layer sheet, which is composed of PP/PS+CaCo3+PP/PS. It can decrease the cost but also environmental. Multi-layer like PP PS EVOH sheet extrusion line, this kind of machine for high barrier packaging.like Jelly, cheese, medical packing, etc.

Main applications of PP PS sheet

• PP/PS blister sheet
• PP/PS single-layer sheet, PP/PS co-extruded two-color sheet, PP double-sided high-transparency sheet, etc. Sheet used in the blister packaging industry.
• PP stationery sheet
• PP transparent sheet, frosted sheet (coarse sand, fine sand), two-color sheet used in stationery packaging industry sheet.
• PP foam sheet, PP foam sheet has unique advantages, PP foam sheet with a density of over 0.45g/m3 has good bending resilience, not easy to deformation, so it has a broad prospect in the field of folders; PP foam sheet with a density of 0.6g/m3 has good mechanical properties and has a very broad future in the field of automobile interior decoration. It can be processed into carpet support materials, shade board, sound insulation board, luggage rack, interior decoration, cover, box, etc. PP foam sheet with the density of 0.3g/m3 has good flexibility and resilience, suitable for packaging, partition board and other fields.

In both single-screw and twin-screw PP/PS sheet extrusion systems, specialized engineering solutions address the distinct processing requirements of polypropylene and polystyrene. For single-screw configurations, manufacturers employ precision-engineered length-to-diameter (L/D) ratios to optimize material throughput and thermal homogeneity, complemented by advanced vacuum venting systems that actively degas molten polymers during processing. GWELL, a foremost Chinese extrusion technology innovator, has further elevated twin-screw architectures through an integrated vacuum subsystem specifically engineered for co-rotating twin-screw extruders. This synchronized design achieves complete moisture extraction throughout the compounding sequence, effectively eliminating volatiles that compromise sheet crystallinity – a critical advancement ensuring optimal sheet integrity for moisture-sensitive applications.

GPPS Quantum Dot Diffusion Plate Extrusion Line

GWELL's GPPS Quantum Dot Diffusion Plate Extrusion Line represents an advanced manufacturing platform engineered for precision optical-grade polymer processing. This 200-meter continuous production system integrates quantum dot compounding technology with high-precision extrusion mechanics to produce diffusion plates meeting stringent photometric specifications for premium display applications.

The extrusion line is equipped with advanced technology and controls to ensure precise temperature and pressure settings, resulting in consistent product quality and performance. Our team of experts can customize the extrusion line to meet your specific production requirements and deliver a turnkey solution for producing diffusion plates for a wide range of applications.

Whether you need diffusion plates for LED lighting, display panels, or other optical applications, our GPPS Quantum Dot Diffusion Plate Extrusion Line is the ideal solution for achieving outstanding results with efficiency and reliability. Contact us today to learn more about how our extrusion line can elevate your production capabilities.

• PP/PS sheet is flexible in processing, transparent, non-toxic, environmentally friendly and easy to be recycled.
• Vacuum Moulding: food packing, fruit packing, toy box, gift box, etc.
• Obstructing Application: Electronic components packaging.
• General Application: stationery pieces,hardware packing,decoration materials,etc.
• Special Application: High barrier packaging(PP PS EVOH multi-layer).