Suzhou JWELL PE Stone Paper Production Line: Complete Manufacturing Process Analysis

PE stone paper is a novel, eco-friendly material manufactured through a process of polymer extrusion and stretching. It is primarily composed of ultrafine calcium carbonate powder (CaCO₃), combined with a small proportion of polyethylene (PE) resin.

Its main raw materials include

• Polyethylene (PE)

• Ultrafine calcium carbonate powder (such as calcite, marble, etc.)

• Functional additives

Notably, the calcium carbonate content typically exceeds 70%.
Following specialized processing, the final product emerges as a new type of green material that uniquely combines

• The writing properties of paper

• The durability of plastic

• Eco-friendly, low-carbon attributes

Based on the equipment and process orientation of JWELL Extrusion Line, a complete PE stone paper production line typically comprises the following core process systems:

1.Feeding System

• Stone paper production begins with the precise conveyance of raw materials.
• The system feeds the following components:
• PE resin
• Ultrafine calcium carbonate powder
• Functional additives

into the production line using automated metering and conveying equipment.

Given the extremely stringent requirements for the uniform dispersion of stone powder in stone paper, the feeding system typically incorporates

• Vacuum conveying
• Automated weighing
• A sealed, dust-proof design

to ensure production stability and raw material precision.

This stage directly impacts

• Product stability
• Thickness uniformity
• Subsequent stretching performance

2.Extruder A+B

The production line typically employs a collaborative dual-extruder configuration.

Specifically

• The main extruder is responsible for the plasticization of the primary raw materials.
• The auxiliary extruder manages the functional layers or auxiliary materials.
• Through a combination of high-temperature melting and screw shearing action, the PE resin and the high-proportion calcium carbonate are thoroughly blended.

This stage plays a decisive role in determining

• The dispersion quality of the stone powder;
• The stability of the melt; and
• The flow properties of the material.

A high-performance screw structure and a stable temperature control system constitute the critical core for ensuring the quality of the stone paper.

3. Metering & Mixing System

Before entering the die head, the material passes through a high-precision metering and dynamic mixing system.

This system can:

• Precisely control raw material ratios
• Maintain stable melt pressure
• Improve material uniformity

Especially during the production of highly filled calcium carbonate materials, the stability of the metering system directly impacts:

• Finished surface quality
• Stretching performance
• Subsequent processing stability

4. Co-extrusion Die Head

After sufficient plasticization and mixing, the melt enters the co-extrusion die head system.

The die head is responsible for

• Uniform melt distribution
• Sheet thickness control
• Stable transverse flow

A high-precision die head effectively ensures

• Smooth sheet surfaces
• Consistent thickness
• Uniform subsequent stretching

This is a key step in forming high-quality base sheets for stone paper.

5. Two-Roll Calendering System

After leaving the die head, the molten sheet enters the two-roll calendering system.

This process is mainly used for

• Surface polishing
• Fine thickness adjustment
• Improving surface flatness

After calendering, the sheet surface becomes more

• Smooth
• Uniform
• Suitable for subsequent printing and stretching

This process has a significant impact on the final texture and appearance quality of stone paper.

6. Cooling System

After calendering, the sheet quickly enters the cooling system.

Through cooling and shaping, the system helps to:

• Stabilize the material structure
• Prevent sheet deformation
• Improve dimensional stability

A stable cooling speed effectively avoids:

• Surface shrinkage
• Thickness fluctuation
• Unstable subsequent stretching

This is also one of the key control points in high-speed continuous production.

7. Haul-off Unit System

The cooled sheet is stably conveyed by the haul-off system.

The haul-off unit is mainly responsible for

• Maintaining stable running speed
• Controlling tension
• Keeping the sheet flat

High-precision synchronized control ensures

• Stable continuous production
• Accurate edge trimming
• Uniform winding tension

During high-speed stone paper production, haul-off stability directly affects overall line efficiency.

8. Edge Trim Processing System

During production, the sheet edges usually require automatic trimming.

The trimmed edge materials can be recycled online and reintroduced into the production process.

This design effectively achieves

• Raw material recycling
• Reduced production loss
• Improved material utilization

For large-scale industrial production, edge recycling is an important method for reducing costs.

9. Transverse Cutting System

According to different product specifications, the production line can be equipped with a transverse cutting system.

It is used for

• Fixed-length cutting
• Automatic sheet separation
• Multi-specification production

Suitable for

• Stone paper sheets
• Printing materials
• Packaging materials
• and other product types.

10. Finished Product Winding System

Finally, the stone paper material enters the automatic winding system.

The entire PE Stone Paper Production Line usually adopts PLC intelligent control to achieve

• Automatic tension adjustment
• High-speed precision winding
• Online inspection
• Automatic roll changing

The final products feature

• Smooth surfaces
• Uniform thickness
• Stable winding quality

resulting in high-quality finished stone paper rolls.

The core technology of stone paper lies in the microporous structure formed during the stretching process.

Through specialized stretching technology, numerous micropores are created inside the material, giving the product

• Paper-like writing performance
• Excellent printability
• Lower material density

At the same time, due to the PE resin structure, it also provides

• Waterproof performance
• Moisture resistance
• Insect resistance
• Tear resistance
• Wear resistance

This is the key reason why stone paper differs from traditional paper

Under increasingly strict global environmental regulations, stone paper is gradually becoming an important material for green packaging and eco-friendly printing.

According to market data:

The global stone paper market reached approximately 654.2 million yuan in 2023 and is expected to reach 937.4 million yuan by 2029, with a compound annual growth rate (CAGR) of approximately 6.3%.

along with

• Global environmental policy promotion
• Growing demand for green packaging
• Upgrading of new material industries

the stone paper market still has significant growth potential.

At the same time

• Increasing demand from the Middle East market
• Government environmental subsidies
• Expansion of emerging packaging industries
• are further driving investment enthusiasm for PE Stone Paper Production Line equipment.

• The transition from "wood-based papermaking" to "stone-based papermaking" is not only a technological upgrade in materials, but also a transformation in green manufacturing concepts.
• With the continuous development of automated equipment, co-extrusion technology, and high-filler material processing, PE stone paper is gradually becoming an important direction for future eco-friendly packaging and green printing industries.
• A complete, efficient, and stable PE Stone Paper Production Line will continue to serve as the core foundation driving the development of this industry.