SPC Floor Sheet Machine: The Complete Buyer's Guide 2026
The SPC floor sheet machine has become the most sought-after extrusion line in the global flooring industry. Stone Plastic Composite (SPC) rigid-core flooring now dominates the luxury vinyl segment worldwide — and every plank starts on an extrusion calender line like those manufactured by Qingdao Precision Machine Co., Ltd. This guide gives you everything you need to evaluate, specify, and purchase the right SPC flooring machine for your factory.
What Is an SPC Floor Sheet Machine?
An SPC floor sheet machine is a complete extrusion and calendering line that converts PVC resin, calcium carbonate (limestone powder), stabilisers, and processing aids into a dense, rigid, dimensionally stable composite sheet — the core layer of every SPC flooring plank.
Unlike traditional LVT (Luxury Vinyl Tile), SPC contains no plasticiser (DINP/DEHP). The high limestone content — typically 50–70% by weight — gives the finished plank exceptional rigidity, near-zero water absorption, and outstanding dimensional stability across temperature ranges from -15°C to +60°C.
Qingdao Precision Machine SPC floor sheet extrusion and calendering line — producing rigid-core SPC flooring at 4–8 m/min.
How Does the SPC Extrusion Line Work?
The complete SPC production process runs through five key stages on a single integrated line:
| Stage | Equipment | Function |
|---|---|---|
| 1. Mixing | High-speed mixer + cooling mixer | Combines PVC resin, CaCO₃, stabiliser, lubricant into a dry blend at 115–120°C, cools to below 45°C |
| 2. Extrusion | Conical/parallel twin screw extruder | Melts and homogenises the dry blend; delivers consistent melt flow to the die |
| 3. Die shaping | Wide flat die (600–2,200 mm) | Forms the molten compound into a flat, wide sheet at target core thickness (2.5–6 mm) |
| 4. Calendering | 4-roll or 6-roll calender stack | Compresses, polishes, and dimensionally calibrates the sheet; embossing imparts texture |
| 5. Cooling & cutting | Cooling conveyor, haul-off, cutter, stacker | Solidifies the sheet, cuts to length, stacks for downstream lamination |
Key Technical Insight: The calender roll configuration is the most critical variable in SPC line performance. A 4-roll calender suits standard SPC (3.5–5 mm core); a 6-roll configuration adds a pre-calendering nip for thin-core (2–3 mm) premium SPC.
SPC Machine Specifications: What to Compare
| Parameter | Entry Level | Mid Range | High Output |
|---|---|---|---|
| Extruder model | SJSZ-65/132 | SJSZ-80/156 | SJSZ-92/188 or parallel |
| Die width | 800–1,000 mm | 1,200–1,400 mm | 1,600–2,200 mm |
| Calender rolls | 4-roll | 4-roll | 6-roll |
| Sheet thickness | 2–6 mm | 2–6 mm | 1.5–8 mm |
| Line speed | 3–5 m/min | 4–7 m/min | 5–10 m/min |
| Output (kg/h) | 400–600 | 600–900 | 900–1,400+ |
| Drive control | VFD + basic PLC | Siemens PLC + HMI | Siemens/Mitsubishi full servo |
Raw Material Formula for SPC Core
A typical SPC core compound uses the following formulation (parts per hundred resin, phr):
- ✔ PVC resin K55–K58: 100 phr
- ✔ Calcium carbonate (800–1250 mesh): 100–150 phr
- ✔ Ca-Zn stabiliser: 4–6 phr
- ✔ CPE impact modifier: 3–6 phr
- ✔ ACR processing aid: 2–4 phr
- ✔ Lubricant system: 1–2 phr
Left: Four-roll calender stack. Right: Downstream haul-off and panel cutting station.
SPC vs LVT vs WPC: Which Flooring Line Do You Need?
| Feature | SPC | WPC | LVT |
|---|---|---|---|
| Core composition | PVC + CaCO₃ | PVC + wood + foam | PVC + plasticiser |
| Core density | 1.8–2.0 g/cm³ | 0.6–0.9 g/cm³ | 1.3–1.6 g/cm³ |
| Dent resistance | Excellent | Good | Fair |
| Market trend | Upward / Fast growing | Stable | Mature |
Related Flooring Production Lines
LVT Flooring Machine Multi-layer co-extrusion line for Luxury Vinyl Tile, with inline UV coating option. View Product → PVC WPC Foam Board Machine For WPC flooring core production. Twin conical screw design; output density 0.45–0.8 g/cm³. View Product →5 Questions to Ask Before You Buy
- ✔ What is the target SPC thickness and plank width?
- ✔ What annual production volume do you need?
- ✔ Will the line also run WPC or LVT?
- ✔ What power supply is available on site?
- ✔ Do you need turnkey supply?
Qingdao Precision Machine's engineering team provides a complete technical proposal within 24 hours. Contact us now to get started.
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