SPC Flooring Production Line Solutions by StarsPlas
In large-scale SPC flooring manufacturing, burning material issues (yellowing, black spots, material degradation, carbonized compounds, or burnt PVC material) are among the most common production problems faced by SPC flooring factories worldwide. These defects not only affect flooring quality and appearance, but also increase scrap rates, production costs, downtime, and delivery delays.
As a professional StarsPlas EPC contractor for SPC flooring production lines, we specialize in complete plant solutions including equipment design, manufacturing, installation, commissioning, and technical support. Based on years of field experience and customer feedback, we summarize the most common causes of burning material in SPC flooring extrusion production and provide practical troubleshooting solutions for manufacturers.
Common Causes of Burning Material in SPC Flooring Extrusion
In SPC flooring extrusion production, burning material problems are closely related to:
Understanding the frequency and characteristics of burning material defects can help manufacturers quickly identify the root cause and reduce troubleshooting time.
Possible Cause: Excessive Screw and Barrel Clearance
When the clearance between the extrusion screw and barrel becomes too large, material backflow occurs during extrusion. Some material remains inside the barrel too long and experiences thermal degradation under high temperature, eventually creating burnt material, black specks, or yellow discoloration.
Recommended Solution
A. Vacuum Degassing System Failure
Insufficient vacuum pressure or air leakage in the vacuum system prevents moisture and volatile gases from being discharged efficiently. This causes:
Recommended Solution
Long-term high-load operation causes screw surface wear, reducing conveying efficiency and plasticizing performance. Poor melting uniformity can lead to localized overheating and burnt compounds.
Recommended Solution
Main Cause: High Moisture Content in Calcium Carbonate (CaCO₃)
Moisture in calcium powder or fillers is one of the most common causes of unstable burning material issues in SPC flooring production.
When wet material enters the extrusion system:
This issue is especially common during startup periods.
Recommended Solution
Screw Mixing Core Problems
If the screw mixing core surface is rough, scratched, or damaged, material can accumulate easily. Over time, the accumulated material carbonizes and creates burnt residues.
Additionally, damaged chrome plating on the mixing core increases friction and causes material sticking and overheating.
Solution
Poor mold flow design, rough die surfaces, or dead corners inside the extrusion die can trap material for extended periods, eventually causing carbonized buildup and burnt material contamination.
Solution
Water leakage, poor sealing, or contamination inside the hot mixer can introduce moisture and impurities into the SPC formulation.
Solution
Overheating in certain barrel zones or inaccurate thermocouple readings can cause localized PVC decomposition.
Solution
Unstable stabilizer systems or poor lubrication formulations can reduce thermal stability during SPC extrusion.
Contaminated raw materials or oversized particles may also accumulate inside equipment and create burning material defects.
Solution
Fundamentally, burning material in SPC flooring extrusion is caused by:
Instead of blindly stopping production, manufacturers should adopt a systematic troubleshooting method:
✅ Frequency analysis
✅ Equipment inspection
✅ Raw material moisture testing
✅ Vacuum system calibration
✅ Temperature control verification
This approach allows SPC flooring factories to quickly identify root causes and reduce downtime.
As an experienced EPC contractor for SPC flooring manufacturing plants, StarsPlas provides:
We help SPC flooring manufacturers improve:
If you are experiencing burning material issues, extrusion problems, black specks, PVC degradation, or other SPC flooring production defects, contact our engineering team today.
📧 Email: [email protected]
We provide customized SPC flooring manufacturing solutions for global flooring factories and industrial investors.
StarsPlas is a fully automatic equipment research and development company focusing on green building materials.
Our company is committed to providing industry 4.0 automation production solutions in accordance with European and American standards.
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