Wuhan Handern Machinery Co.,Ltd
The PP danpla sheet extrusion machine from Handern represents the pinnacle of hollow sheet production technology. As the first Chinese company to develop and globally supply this equipment, Handern has captured over 60% of the worldwide market for PP danpla sheet extrusion lines, serving customers in more than 80 countries.
This advanced PP danpla sheet extrusion machine is specifically engineered to manufacture high‑quality double‑wall polypropylene hollow sheets – commonly known as Danpla, Coroplast, Polyflute, or twin‑wall sheets. With production widths reaching up to 3600mm and thicknesses from 2mm to 18mm, our PP danpla sheet extrusion equipment delivers exceptional flatness, precise dimensional control, and outstanding production efficiency.
Handern holds the #1 position globally in PP danpla sheet extrusion machine sales for over a decade – a testament to our quality, reliability, and continuous innovation.
Handern is the global pioneer of one‑step hollow sheet manufacturing technology, eliminating the traditional two‑step process of "pelletizing first, then sheet forming." Our proprietary technology enables direct powder‑to‑sheet forming without pre‑pelletizing, revolutionizing the industry.
Key technological breakthroughs:
Developed in collaboration with Academician Qu Jiping's team from South China University of Technology – the only academician in China's plastic machinery field
Patented intensified mixing twin‑rotor extruder achieves uniform dispersion of high‑content inorganic fillers in polymer matrices through vibration shear‑stretch rheological synergy
Processing energy consumption reduced by 50% , production efficiency increased by over 50%
Single‑machine output capacity up to 600 kg/h
Technology certified by China Machinery Industry Federation as "world‑first, internationally leading"
| Machine Type | Sheet Width (mm) | Sheet Thickness (mm) | Max. Extrusion Capacity (kg/h) |
|---|---|---|---|
| 1400 | 1250 | 2‑6 / 6‑12 / 12‑18 | 230 / 280 / 350 |
| 1800 | 1650 | 2‑6 / 6‑12 / 12‑18 | 280 / 350 / 420 |
| 2300 | 2150 | 2‑6 / 6‑12 | 340 / 350 |
| 2600 | 2450 | 2‑6 / 6‑12 | 360 / 480 |
| 3200 | 3050 | 2‑6 / 6‑12 | 600 |
| 3600 | 3400 | 2‑6 / 6‑12 | 680 |
Note: All models support single‑layer, AB‑type, and ABA‑type multi‑layer sheet production. Custom widths and thicknesses are available on request.
A complete PP danpla sheet extrusion line from Handern integrates the following precision‑engineered modules:
High‑Efficiency Single‑Screw Extruder – Built with 38CrMoAlA nitrided steel, featuring proprietary screw geometry for superior melting and homogenization
Hydraulic Screen Changer – Enables continuous filtration without interrupting the PP danpla sheet extrusion process
Precision T‑Die – Manufactured with high‑grade tool steel and optimized flow channels for uniform wall thickness
Multi‑Zone Vacuum Calibration Table – Independent cooling zones for rapid and precise forming of the hollow structure
Servo‑Driven Haul‑off Unit – Consistent traction force to maintain sheet thickness accuracy
Computerized Cross‑Cutter – Accurate length cutting with automatic stacking
Optional Winder / Stacker – Flexible configurations for sheet winding or stacking
Optional upgrades: Corona treatment unit (enhances printability), edge trimming system, annealing furnace, anti‑static/UV/flame‑retardant additive feeders.
Every PP danpla sheet extrusion machine from Handern is powered by a high‑torque extruder with a specially designed screw that ensures excellent plasticizing capacity and stable melt output. The nitrided barrel and screw offer extended service life, reducing maintenance frequency and cost.
Handern's PP danpla sheet extrusion line achieves a thickness tolerance of ≤ ±0.02mm – one of the tightest in the industry. This is made possible through our proprietary vacuum calibration system and closed‑loop automatic control. The resulting sheets exhibit outstanding surface smoothness, perfect for high‑quality printing, laminating, and conversion applications.
Our PP danpla sheet extrusion equipment incorporates intelligent PID temperature control and an optimized water circulation system, cutting overall power consumption by up to 18% compared to conventional designs. The new generation high‑speed line achieves a 30%+ increase in production speed over previous models.
The Handern PP danpla sheet extrusion machine features a Siemens 500‑series PLC with an intuitive touch‑screen interface:
Intelligent Control: Quad‑core CPU / microsecond‑level指令 / 20MB storage; EtherCAT bus with 127 slave stations per port; self‑tuning PID algorithm for high‑precision temperature control (±0.1°C)
Production Management: Real‑time monitoring of power consumption, motor speed, barrel temperature, mold temperature, sheet weight, thickness, and width; automatic daily/monthly production calculation; equipment efficiency analysis including runtime, standby time, and fault logs
IoT Remote Monitoring: VNC screen mirroring to mobile phones/PADs for real‑time monitoring and control; remote program upload/download and diagnostics; APP/PC monitoring with fault event management
Data Visualization: Customizable dashboards with drag‑and‑drop widgets; real‑time temperature curves; multi‑line production comparison; shift management
Our PP danpla sheet extrusion line supports rapid mold changes – reducing changeover time by 40% – allowing you to switch between different sheet widths and thicknesses with minimal interruption. The line produces single‑layer, AB‑type, and ABA‑type composite sheets, with optional functional additives for UV resistance, flame retardancy, anti‑static properties, and custom colors.
Handern holds a dominant position in the global market for PP danpla sheet extrusion machines, with over 60% market share. We are trusted by manufacturers worldwide for our quality, reliability, and support. Backing every machine is our industry‑leading 3‑year comprehensive warranty – a testament to our confidence in the durability and performance of our equipment.
Handern has independently developed and mastered a wide range of material formulations for PP hollow sheet production across multiple material types and specifications. We provide scientifically sound material formulations tailored to customer requirements and diverse application scenarios.
Below are representative formulations developed and validated by Handern's R&D team:
| Component | Proportion | Function |
|---|---|---|
| PP Homopolymer (MFR 0.2‑0.7g/10min, isotacticity ≥96%) | 100 parts | Base resin – provides strength and formability |
| PP Copolymer (1‑4% ethylene random or block copolymer) | 5‑15 parts | Impact modification and flexibility enhancement |
| Calcium Carbonate (filler) | 10‑30 parts | Cost reduction, stiffness improvement |
| Antioxidant (Primary) | 0.1‑0.3 parts | Thermal stability during processing |
| Antioxidant (Secondary) | 0.1‑0.3 parts | Synergistic stabilization |
| UV Absorber | 0.1‑0.3 parts | Weathering resistance |
| Color Masterbatch | 1‑3 parts | Color customization |
Applications: General‑purpose packaging, signage, stationery.
| Component | Proportion | Function |
|---|---|---|
| PP Resin (Virgin or recycled) | 30‑60% | Thermoplastic matrix providing formability and toughness |
| Phosphogypsum Powder (treated, 300‑400 mesh) | 40‑70% | Inorganic filler – industrial waste utilization |
| Coupling Agent | 3‑4% | Improves interfacial compatibility between PP and filler |
| Processing Aid | 1‑2% | Enhances melt flow and dispersion |
| Antioxidant Package | 0.2‑0.5% | Prevents thermal degradation |
| Color Masterbatch | As needed | Color adjustment (compensates for filler whiteness) |
Key Advantages:
Filling ratio up to 70% – significantly reduces material costs
Phosphogypsum packaging material meets EU and US food contact safety standards
Physical properties superior to traditional corrugated cardboard – especially in water resistance and compression strength
Enables high‑value utilization of industrial solid waste, addressing national environmental challenges
Applications: Agricultural packaging, industrial logistics,冷链运输, anti‑moisture packaging.
| Component | Proportion | Function |
|---|---|---|
| PP Resin | 83‑85% | Base resin |
| Flame Retardant (halogen‑free preferred) | 9‑11% | Fire resistance – meets UL94 V‑0 or V‑2 |
| Toughening Agent | 1.5‑4% | Impact resistance improvement |
| Primary Antioxidant | 0.1‑0.3% | Thermal stability |
| Secondary Antioxidant | 0.1‑0.3% | Synergistic stabilization |
| UV Absorber | 0.1‑0.3% | Weathering resistance |
| Dispersant / Processing Oil | 0.05‑0.15% | Improves dispersion and melt flow |
| Color Masterbatch | 1‑3% | Color customization |
Applications: Electronics packaging, automotive components, construction panels requiring fire safety.
| Component | Proportion | Function |
|---|---|---|
| PP Resin | 90‑95% | Base resin |
| Anti‑Static Agent (permanent or migratory) | 1‑3% | Surface resistivity reduction to 10⁹‑10¹¹ Ω |
| Filler (optional) | 5‑15% | Cost and stiffness optimization |
| Antioxidant Package | 0.2‑0.5% | Thermal stability |
| Processing Aid | 0.5‑1% | Melt flow enhancement |
Applications: Electronics component packaging, cleanroom applications, ESD‑sensitive product protection.
| Component | Proportion | Function |
|---|---|---|
| PP Secondary Recycled Material (modified) | 60‑80% | Low‑cost base material |
| PP Virgin Resin | 10‑20% | Property enhancement and process stability |
| Impact Modifier | 3‑5% | Compensates for recycled material property degradation |
| Filler (calcium carbonate or phosphogypsum) | 10‑20% | Cost reduction, stiffness improvement |
| Antioxidant & Stabilizer Package | 0.3‑0.8% | Compensates for degradation in recycled material |
| Processing Aid | 0.5‑1.5% | Improves melt flow of recycled resin |
Key Advantages:
Supports circular economy – utilizes China's 60+ million tons of annual plastic waste
Handern's proprietary modification technology enhances mechanical properties and flowability of PP secondary recycled materials
Significant material cost reduction compared to virgin resin formulations
Applications: Cost‑sensitive packaging, non‑food contact applications, agricultural uses.
| Component | Proportion | Function |
|---|---|---|
| PP Resin (high MFR for better flow) | 85‑92% | Base resin with excellent thin‑wall flow |
| Foaming Agent / Blowing Agent | 0.5‑2% | Density reduction (target: 180‑300 g/m²) |
| Nucleating Agent | 0.1‑0.3% | Controls cell structure uniformity |
| Filler (fine particle) | 5‑10% | Stiffness maintenance at low weight |
| Antioxidant Package | 0.2‑0.4% | Thermal stability |
| Processing Aid | 0.3‑0.8% | Enhances melt strength during foaming |
Key Advantages:
Achieves as low as 180 g/m² sheet weight
Ideal for lightweight packaging and display applications
Reduces transportation costs and material usage
Applications: Lightweight packaging, point‑of‑purchase displays, file folders, lightweight dividers.
| Application Scenario | Recommended Formulation | Key Feature |
|---|---|---|
| General packaging | Standard PP (Formulation 1) | Cost‑effective, balanced performance |
| High‑moisture / agricultural | Phosphogypsum‑filled (Formulation 2) | Waterproof, low cost, eco‑friendly |
| Electronics / fire‑sensitive | Flame‑retardant (Formulation 3) | UL94 V‑0/V‑2 compliance |
| Electronics / sensitive components | Anti‑static (Formulation 4) | ESD protection |
| Cost‑sensitive / non‑food | Recycled PP (Formulation 5) | Circular economy, low cost |
| Lightweight / display | Ultra‑light (Formulation 6) | 180‑300 g/m², transport‑saving |
Handern provides custom formulation development based on your specific requirements – including target sheet weight, mechanical properties, regulatory compliance, and cost targets.
Handern pioneered the hollow sheet lamination process to address inherent defects of recycled PP materials and industrial waste fillers – specifically insufficient whiteness and unstable coloration.
Independently developed fully automatic high‑speed laminating machine applies an ultra‑thin PP film to the sheet surface
Meets higher printing quality requirements while enhancing sheet strength
The laminating PP film is made of the same material as the substrate – can be directly crushed and recycled without separation
Truly achieves full‑lifecycle recyclability and zero‑waste resource utilization
One‑step process eliminates pelletizing: processing cost reduced from ~1,300 RMB/ton to ~500 RMB/ton – over 60% reduction
Extruder energy saving: up to 20% reduction in power consumption
Production speed: 30%+ increase over previous generation
Supports high‑filling (50‑70%) of phosphogypsum, fly ash, and other industrial solid wastes
Raw material cost reduced by 30%
Phosphogypsum hollow sheet production cost as low as ~3,000 RMB/ton – already price‑competitive with traditional moisture‑proof corrugated cardboard
Supports PP secondary recycled material modification for further cost savings
| Raw Material Type | Price (RMB/ton) | Filling Ratio | Final Sheet Cost (RMB/ton) |
|---|---|---|---|
| PP Virgin + 0% filler | 7,500 | 0% | ~3,830 |
| PP Primary Recycled + 60% phosphogypsum | 6,000 + 400 | 60% | ~3,260 |
| PP Secondary Modified + 60% phosphogypsum | 5,000 + 400 | 60% | ~2,880 |
One‑step process processing cost: ~500 RMB/ton | Traditional two‑step processing cost: ~1,300 RMB/ton
| Industry | Typical Applications |
|---|---|
| Logistics & Packaging | Reusable returnable boxes, turnover pallets, container dividers, cushioning liners, protective packaging |
| Signage & Advertising | Outdoor advertising panels, POP displays, exhibition stands, lightbox backings, real estate signage |
| Construction & Building | Protective coverings, concrete formwork panels, temporary flooring, light partition walls |
| Agriculture & Food | Fruit and vegetable crates, seafood transport boxes, greenhouse shading panels |
| Automotive | Interior protection films, component separation dividers, trunk liners |
| Stationery & Office | File folders, document holders, binders, card sleeves, presentation portfolios |
| Electronics | Anti‑static packaging for sensitive electronic components and circuit boards |
| Model | Max. Sheet Width | Thickness Range | Max. Output | Main Motor Power | Approx. Dimensions (L×W×H) |
|---|---|---|---|---|---|
| 1400 | 1250 mm | 2‑18 mm | 350 kg/h | 110 kW | 28 × 4.5 × 4.5 m |
| 1800 | 1650 mm | 2‑18 mm | 420 kg/h | 132 kW | 29 × 5.0 × 4.5 m |
| 2300 | 2150 mm | 2‑12 mm | 350 kg/h | 132 kW | 30 × 5.5 × 4.8 m |
| 2600 | 2450 mm | 2‑12 mm | 480 kg/h | 160 kW | 31 × 5.8 × 4.8 m |
| 3200 | 3050 mm | 2‑12 mm | 600 kg/h | 185 kW | 33 × 6.2 × 5.0 m |
| 3600 | 3400 mm | 2‑12 mm | 680 kg/h | 200 kW | 35 × 6.8 × 5.2 m |
Specifications are approximate and may vary based on custom configurations.
✅ 3‑Year Full Warranty – Covers the entire PP danpla sheet extrusion machine (excluding normal wear parts) – one of the longest warranties in the industry
✅ Free On‑Site Installation & Commissioning – Our experienced engineers travel to your facility to ensure smooth startup
✅ Comprehensive Operator Training – We train your team until they can confidently operate and maintain the PP danpla sheet extrusion line independently
✅ Lifetime Technical Support – Ongoing assistance with troubleshooting, process optimization, and formula adjustments
✅ Genuine Spare Parts – Available at factory cost, ensuring quick replacement and minimal downtime
✅ Turnkey Solutions – Full‑process automation covering mixing, feeding, production, palletizing, printing, lamination, die‑cutting, and box‑making
Founded in March 2005, Wuhan Handern Machinery Co., Ltd is a national‑level "Specialized and Sophisticated" Little Giant Enterprise, a provincial‑level Manufacturing Single‑Champion Enterprise, and a national High‑Tech Enterprise.
Global #1 in hollow sheet extrusion line sales for over a decade
China's only supplier capable of delivering complete dry‑process lithium battery separator production lines
Export to 20+ countries and regions worldwide
Academician Qu Jiping (China's only academician in plastic machinery) serves as Chief Scientist
Joint research centers with South China University of Technology and Huazhong University of Science and Technology
Every production operation is unique. Handern offers complete turnkey solutions for PP danpla sheet extrusion – from standard models to fully customized lines engineered for your specific width, thickness, output, and material requirements.
We also provide custom formulation development based on your target sheet properties, cost targets, and regulatory requirements.
Contact us today to discuss your project. Let's build a solution that drives your success.
Wuhan Handern Machinery Co., Ltd
Website: https://www.handern.net/
Email: handern@handern.com
Tel / WeChat: +86 18627187890
WhatsApp: +86 13554311083
Global Market Share: 60%+ | Export Countries: 80+ | Warranty: 3 Years
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