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I. Differences in Raw Materials and Production Processes
1. PVC Wood-Plastic Profiles
Main Raw Materials: Polyvinyl chloride (PVC) resin, wood fibers (or plant fibers such as bamboo fibers), fillers (e.g., calcium carbonate), and additives (stabilizers, lubricants, flame retardants, etc.).
Production Process:
Formed by high-temperature extrusion (processing temperature typically 160–200°C).
PVC resin needs to be fully mixed and plasticized with wood fibers, requiring high precision in equipment temperature control.
More stabilizers are added to prevent PVC from decomposing at high temperatures.
2. PE Wood-Plastic Profiles
Main Raw Materials: Polyethylene (PE) resin (usually high-density polyethylene HDPE or low-density polyethylene LDPE), wood fibers, compatibilizers (e.g., maleic anhydride-grafted PE to improve compatibility between resin and fibers), and additives (antioxidants, UV absorbers, etc.).
Production Process:
Lower processing temperature (generally 140–180°C), causing less wear on equipment.
Compatibilizers are essential to enhance the bonding between PE and wood fibers; otherwise, delamination is prone to occur.
II. Performance Comparison
Performance Dimension | PVC Wood-Plastic Profiles | PE Wood-Plastic Profiles |
Density | Higher (约 1.3–1.6g/cm³), due to fillers like calcium carbonate | Lower (约 0.9–1.2g/cm³), lighter in weight |
Hardness & Strength | High hardness and rigidity, suitable for load-bearing structures | Better flexibility and impact resistance, less prone to cracking |
Weather Resistance | Moderate weather resistance; long-term exposure may cause fading or embrittlement | Superior weather resistance; enhanced anti-aging ability with UV absorbers |
Chemical Corrosion Resistance | Good acid and alkali resistance, suitable for humid or chemical-exposed environments | Good solvent resistance, but slightly inferior to PVC in strong acid/alkali resistance |
Heat Resistance | Lower heat resistance (softening point ~80–100°C), unsuitable for high-temperature environments | Slightly higher heat resistance (softening point ~100–120°C), still not suitable for high-temperature scenarios |
Flame Retardancy | Naturally flame-retardant (PVC contains chlorine), which can be further improved with flame retardants | Flammable (PE is a hydrocarbon), requiring additional flame retardants |
Environmental Friendliness | May release trace vinyl chloride monomers during production (strict control needed); difficult to degrade after disposal | PE itself is more environmentally friendly, but it still causes plastic pollution and requires recycling |
Surface Texture | Smooth surface with imitation wood grain, but feels hard | More natural texture, closer to wood in touch; can be treated with wire drawing, embossing, etc. |
III. Application Scenarios
1. Typical Applications of PVC Wood-Plastic Profiles
Construction Field:
Outdoor Flooring: Suitable for parks, terraces, pool areas, etc., due to high hardness and water resistance, but avoid long-term sun exposure.
Door & Window Profiles: Replaces traditional PVC doors/windows, enhancing strength with wood fibers, commonly used for balcony frames and interior partitions.
Guardrails & Fences: Such as residential area fences and garden barriers, with strong rigidity and low deformation.
Indoor Decoration:
Baseboards & Door Casings: Waterproof and moisture-proof, ideal for bathrooms, kitchens, and other humid areas.
Ceiling Materials: Lightweight and easy to install, but fire rating should be noted.
Other Scenarios:
Logistics Pallets: High load-bearing capacity and wear resistance, but environmental recycling needs to be considered.
2. Typical Applications of PE Wood-Plastic Profiles
Outdoor Landscape Engineering:
Garden Walkways & Platforms: Good flexibility and impact resistance, suitable for frequently trodden areas like scenic trails and wooden bridges.
Flower Boxes & Seats: Natural texture similar to wood, aesthetic and durable, with excellent UV resistance for long-term outdoor use without fading or cracking.
Municipal & Transportation:
Highway Sound Barriers: Lightweight, easy to install, and weather-resistant for long-term outdoor exposure.
Dock Fenders: Strong impact resistance and seawater corrosion resistance (with anti-salt fog additives).
Indoor High-End Decoration:
Furniture Panels: Such as outdoor tables/chairs and indoor sofa frames, combining wood texture with plastic water resistance.
Wall Panels & Decorative Trims: Customizable surface textures for interior designs pursuing a natural style.
Packaging & Logistics:
Recyclable Packaging Boxes: Lightweight and drop-resistant, replacing traditional wooden or plastic boxes.
IV. Selection Tips and Precautions
Choose Based on Usage Environment:
For high hardness, flame retardancy, or humid environments (e.g., bathrooms, pools), prioritize PVC wood-plastic.
For outdoor weather resistance and impact resistance (e.g., gardens, walkways), prioritize PE wood-plastic.
Environmental Protection and Recycling Considerations:
PE wood-plastic has a relatively simple recycling process, making it preferable for projects requiring circular utilization.
Cost Factors:
PVC wood-plastic is usually cheaper due to more fillers, while high-end PE wood-plastic (with high compatibilizer content) may be pricier.
Construction Notes:
PVC wood-plastic has a large thermal expansion coefficient; leave expansion joints during installation.
PE wood-plastic can be fixed with screws, and its flexibility allows slightly lower installation precision requirements.
Conclusion
PVC wood-plastic profiles excel in rigidity and cost-effectiveness, suitable for scenarios requiring high hardness and water resistance. PE wood-plastic profiles offer advantages in weather resistance and flexibility, making them ideal for long-term outdoor use or impact-resistant environments. The two materials complement each other in construction, landscaping, decoration, etc., and users can select the appropriate material based on specific needs (e.g., application scenarios, performance requirements, budget).
