PP PS Sheet Extrusion Line

At present, the plastics extrusion market is largely dominated by single-screw configurations, particularly for the production of PP/PS sheets, due to their considerably lower equipment costs compared to twin-screw alternatives. As a prominent manufacturer of extrusion machinery in China, GWELL offers a single-screw PP/PS sheet extrusion line that guarantees reliable feeding performance across various material formulations while excelling in plasticizing efficiency. This optimized processing not only enhances the durability and dimensional stability of the sheets but also effectively mitigates common post-production challenges, such as thermal forming fractures and inconsistencies in pigment dispersion within the final products.

In the realm of China's PP/PS sheet extrusion line industry, twin-screw systems emerge as a technologically superior alternative to traditional single-screw setups, offering significantly improved processing capabilities despite their higher initial costs. The twin-screw design is characterized by a modular screw configuration that allows for exceptional adaptability to various materials while ensuring precise and stable feeding dynamics. Its intermeshing geometry facilitates intensive distributive mixing within the processing chamber, resulting in a homogeneous melt formation that enhances both product uniformity and surface integrity. Although this advanced architecture necessitates a larger capital investment, it proves to be economically advantageous for manufacturers who prioritize production efficiency, consistent quality, and minimized material waste—benefits that are particularly crucial in demanding industrial applications.

The PP/PS sheet extrusion line is widely utilized in both single-extruder single-layer sheet production and double-extruder co-extrusion for three-layer sheets. Additionally, there are multi-extruder co-extrusion lines capable of producing composite sheets with up to seven to nine layers, such as high-barrier EVOH multi-layer co-extrusion lines. These advanced extrusion lines are designed to process various polyolefin materials, including PP, PS, and PE, among others.

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

Polystyrene (PS) sheets represent a groundbreaking advancement in eco-friendly packaging materials, having emerged in recent years. Renowned for their remarkable thermoforming capabilities, superior protective features, environmentally conscious attributes, and hygienic qualities, PS sheets have become a preferred choice for blister packaging across a multitude of sectors, including pharmaceuticals, food, toys, electronics, and apparel.  These sheets not only exhibit remarkable versatility but also play a significant role in minimizing environmental impact, making them an attractive option for businesses committed to sustainable practices. The adaptability and durability of PS sheets have established them as a vital component in the packaging industry, effectively meeting the diverse requirements of various products without sacrificing quality or performance.  As consumer awareness of environmental issues continues to rise, the demand for PS sheets is anticipated to increase, further reinforcing their status as a favored packaging solution for a broad array of applications. With their myriad advantages and beneficial effects on the environment, PS sheets are poised to transform the packaging industry, setting new benchmarks 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

The multi-extruder co-extrusion technology has become a cornerstone in the production of multi-layer composite sheets made from polypropylene (PP) and polystyrene (PS). This cutting-edge technique facilitates the development of a wide range of multi-layer configurations, including ABA, ABCBA, ABCDCBA, and beyond. These versatile multi-layer sheets are extensively employed across various industries, including heat forming, printing, hardware packaging, electronic tray production, flocking applications, food packaging, the apparel sector, tool manufacturing, toy creation, stationery design, decorative item crafting, and many more. The adaptability and effectiveness of multi-extruder co-extrusion technology have established it as an essential component in contemporary 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 sheets offer a range of unique advantages that make them highly versatile for various applications. With a density exceeding 0.45 g/m³, these sheets exhibit excellent bending resilience and are resistant to deformation, making them particularly promising for use in folders. When the density reaches 0.6 g/m³, the mechanical properties of the PP foam sheets improve significantly, positioning them as a valuable material for automotive interior decoration. They can be effectively processed into a variety of products, including carpet underlay, sunshades, sound insulation panels, luggage racks, interior trim, covers, and boxes. Additionally, PP foam sheets with a density of 0.3 g/m³ provide remarkable flexibility and resilience, making them ideal for packaging, partition boards, and other applications.

In both single-screw and twin-screw extrusion systems for PP/PS sheets, tailored engineering solutions cater to the unique processing demands of polypropylene and polystyrene. In single-screw setups, manufacturers utilize precisely engineered length-to-diameter (L/D) ratios to enhance material throughput and ensure thermal uniformity. This is further supported by sophisticated vacuum venting systems that actively remove gas from molten polymers during processing. GWELL, a leading innovator in extrusion technology in China, has significantly advanced twin-screw designs by incorporating an integrated vacuum subsystem specifically developed for co-rotating twin-screw extruders. This coordinated approach facilitates thorough moisture removal throughout the compounding process, effectively eliminating volatile compounds that could undermine sheet crystallinity. This critical enhancement guarantees optimal sheet integrity, particularly for applications sensitive to moisture.

GPPS Quantum Dot Diffusion Plate Extrusion Line

The GPPS Quantum Dot Diffusion Plate Extrusion Line from GWELL stands as a cutting-edge manufacturing platform designed for the meticulous processing of optical-grade polymers. Spanning 200 meters, this continuous production system seamlessly combines quantum dot compounding technology with high-precision extrusion mechanics, enabling the creation of diffusion plates that adhere to rigorous photometric standards for high-end display applications.

The extrusion line is outfitted with cutting-edge technology and sophisticated controls, enabling precise management of temperature and pressure settings. This meticulous attention to detail guarantees consistent product quality and performance. Our team of specialists is adept at tailoring the extrusion line to fulfill your unique production needs, providing a comprehensive turnkey solution for manufacturing diffusion plates suitable for a diverse array of applications.

If you require diffusion plates for LED lighting, display panels, or various optical applications, our GPPS Quantum Dot Diffusion Plate Extrusion Line offers the perfect solution for delivering exceptional results with both efficiency and reliability. Reach out to us today to discover how our extrusion line can enhance 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).