PVC Mixer Machine: Why Is Mixing Important Before Extrusion?
29 September, 2026
Outdoor wood-plastic composite WPC decking flooring is made of wood flour (or plant fiber), PE or PP, and additives. It is widely used in outdoor areas such as courtyards, balconies, parks, boardwalks, swimming pools, and docks. The global demand for wood-plastic composite decking continues to grow, driven by low-maintenance outdoor flooring trends, tightening timber regulations, and booming construction markets in developing regions.
This buyer’s guide provides a comprehensive decision-making framework for manufacturers and entrepreneurs investing in a WPC decking production line. The global market is expanding due to demand for low-maintenance outdoor flooring, tightening timber regulations, and construction growth in developing regions. The guide evaluates production lines across five dimensions — material compatibility, production process, output capacity, versatility, and after-sales support — and compares three technologies: one-step, two-step, and co-extrusion. The two-step process (granulation followed by extrusion) is recommended as the minimum standard for mid-to-high-end decking, while co-extrusion is advised for high-UV markets, commanding a 20–40% price premium. A standard SJZ65/132 conical twin-screw line produces 4–5 tons per 24 hours, requiring 200–300 m² of workshop space. Key raw materials include PE resin (30–40%), wood flour (55–65%), calcium carbonate, and additives. Critical supplier selection criteria include industry experience, technology versatility, formula support, and on-site installation and training.
This guide covers the essential decisions for investing in a PE WPC decking extrusion line – from evaluating your options to factory planning and choosing a reliable supplier.
Three converging trends are driving the global WPC decking market:
Low-Maintenance Outdoor Flooring Demand – WPC decking requires no painting, sealing, or staining, and offers superior resistance to moisture, insects, and UV radiation compared to timber.
Environmental Regulations on Timber – Deforestation regulations in Europe, North America, and Southeast Asia make natural timber supply chains more expensive, while WPC offers a compliant, sustainable alternative using recycled wood fiber and polymer.
Construction Growth in Developing Markets – Infrastructure development in the Middle East, Africa, Southeast Asia, and South America creates new opportunities for local WPC decking manufacturers.
For entrepreneurs evaluating entry into this space, explore EANS Machinery’s full range of plastic extrusion solutions and production line configurations.
Before comparing machine specifications, establish clear evaluation criteria across five dimensions:
Can the WPC decking production line process recycled PE and more wood flour formulations? Look for a bimetallic screw and barrel designed to withstand the abrasive nature of wood fiber.
Does it use a one-step or two-step method? The two-step process delivers superior product quality, higher density, and consistent color – essential for mid-to-high-end outdoor decking.
Can the WPC decking extrusion line meet your target volume? A standard SJZ65/132 delivers 4-5 tons per 24 hours.
Can it produce decking, wall cladding, louvers, and columns from one machine? Mold change capability lets you serve multiple market segments.
Does the WPC decking machine manufacturer provide installation, training, and formula support? EANS provides comprehensive after-sales service, including on-site commissioning and operator training.
Choosing the right production process is the most critical decision for your WPC decking machine:
| Aspect | One-Step | Two-Step (Standard) | Co-Extrusion (Premium) |
|---|---|---|---|
| Process Flow | Direct extrusion from powder | Granulation → pelletizing → extrusion | Core extrusion + outlayer co-extrusion |
| Product Quality | Middle | Superior quality, higher density | Excellent — double layer resists UV |
| Output Stability | Moderate — sensitive to variation | High — stable with recycled | High — separate top layer control |
| Equipment Cost | Lowest investment | Moderate investment | Highest — additional co-extrusion |
| Operating Cost | Lower energy consumption | Slightly higher energy & labor | Higher — specialized top layer materials |
| Target Market | Budget segments | Mid-to-high-end outdoor | Premium outdoor in high-UV |
| Weather Resistance | Standard | Good | Excellent — UV & moisture barrier |
Recommendation:
For premium outdoor decking, the two-step process is the minimum standard. In high-UV regions, co-extrusion is strongly advised.
The PE WPC decking making machine from EANS supports both two-step and co-extrusion configurations.
A standard SJZ65/132 WPC decking extrusion line requires 35 m length x 10 m width (350 m2 total including storage). Installed power: 280 kW. Requires cooling tower/chilled water and compressed air at 0.6-0.8 MPa. Each shift needs 2 – 3 operators.
EANS provides a customized workshop layout with every order.
WPC decking is typically formulated as follows:
| Raw Material | Percentage | Function |
|---|---|---|
| PE Resin (HDPE/LDPE/Recycled) | 25 – 30 % | Polymer matrix, binding |
| Wood Flour / Bamboo Fiber | 55–65% | Filler, structural reinforcement |
| Calcium Carbonate | 5–15% | Rigidity, cost control |
| Coupling Agent | 2–5% | Bonding wood fiber with polymer |
| Lubricant | 1–3% | Processing aid, surface finish |
| UV Stabilizer | 0.5–1% | Weather resistance |
| Color Masterbatch | 1–3% | Color customization |
Note: Formulation varies between first-generation and second-generation (co-extruded) WPC decking production; EANS provides customized formula support.
A complete WPC decking production line starts with a High-Speed Heating & Cooling Mixer made of 304 stainless steel, which thoroughly blends wood powder, PE or PP resin, and additives into a uniform compound. The material is then processed by a Parallel Twin-Screw Granulator for initial plasticization and pelletizing. These pellets are fed into a Conical Twin-Screw Extruder (SJZ65/132, 37 kW, bimetallic screws and barrel), where they are remelted and extruded through a custom die with a maximum product width of 300 mm. After extrusion, the WPC decking profile passes through a Cooling Tank for dimensional stability, followed by a Haul-Off Machine for continuous pulling. An Embossing Unit can add realistic wood grain textures to the surface, while the Cutting Machine trims the boards to the required length. For higher production efficiency, an Automatic Stacker is available as an optional unit for collecting and stacking finished WPC decking boards.
Q: PE WPC vs PVC WPC decking?
A: PE WPC offers superior weather resistance for outdoor use. PVC WPC is more economical and best for indoor use.
Q: Minimum factory size?
A: Approximately 350 m2.
Q: Can one machine produce different profiles?
A: Yes – change the die to switch between decking, cladding, louvers, columns, etc.
Q: Installation time?
A: 10-14 days on-site, including debugging and trial production.
Q: Delivery time?
A: 45-60 working days for standard machines.
Contact EANS Machinery for a free feasibility assessment about composite WPC decking extrusion line – machine configuration, workshop layout, formula development, and ROI projection.
Zhangjiagang Eans Machinery Co., Ltd. – 20+ years of extrusion excellence, 2,000+ customers in 32 countries.
