PVC Tarpaulin Thickness Specifications and Applications  

I. Thickness Specifications & Parameters  
| Thickness       | Weight (GSM) | Tensile Strength (N/5cm) | Temp. Range   | Primary Applications       |  
| Ultra-Thin (0.2-0.3mm) | 300-400        | 1500-2000                   | -10°C~60°C       | Temporary sunshades, light cargo covers |  
| Standard (0.45-0.55mm) | 500-650        | 2500-3000                   | -20°C~70°C       | Logistics tarps, outdoor tents |  
| Heavy-Duty (0.6-0.8mm) | 700-900        | 3500-4000                   | -30°C~80°C       | Industrial dust covers, truck tarps |  
| Extra-Heavy (0.9-1.1mm) | ≥1000          | ≥4500                       | -40°C~100°C      | Welding blankets, mine ventilation ducts |  

Key Notes:  
- Tear Resistance: Heavy-duty types (≥0.6mm) use 1000D×1000D polyester base fabric.  
- Coating: Triple-layer PVC (UV-proof + waterproof + adhesive) for extended lifespan (4-10 years).  
- Cold Resistance: DOS plasticizers maintain flexibility at -30°C (ideal for cold-chain logistics).  

II. Thickness-Specific Applications  
1. Ultra-Thin (0.2-0.3mm):  
   - Use Cases: Camping shades, market stall covers.  
   - Pros: Lightweight, portable, low cost.  
   - Cons: Weak wind resistance; avoid sharp objects.  

2. Standard (0.45-0.55mm):  
   - Scenarios:  
     - Truck cargo protection (waterproof ≥2000mmH?O).  
     - Greenhouse curtains (UV-resistant additives).  
   - Features: Acrylic surface treatment for anti-slip performance.  

3. Heavy-Duty (0.6-0.8mm):  
   - Industrial Uses:  
     - Welding blankets (flame-retardant additives).  
     - Port covers (titanate anti-corrosion coating).  
   - Safety: Heat-sealed edges + metal grommets.  

4. Extra-Heavy (0.9-1.1mm):  
   - Extreme Environments:  
     - Mine ducts (abrasion/flammability resistance: Class B1).  
     - Oil rig covers (anti-static: surface resistivity ≤10?Ω).  
   - Reinforcement: Fiberglass base + PTFE coating (180°C short-term tolerance).  

III. Selection Guidelines  
1. Thickness ≠ Durability:  
   - Ultra-thin with 500D×500D base fabric may outperform low-density standard types.  
   - Prioritize "base fabric density + coating thickness" (e.g., 1000D base + 0.3mm coating > 500D base + 0.5mm coating).  
2. Environmental Adaptation:  
   - High-temp sites (e.g., metallurgy) require heat-resistant series (120°C+).  
   - Coastal areas mandate ≥1.0% anti-mildew agents.  
3. Cost Optimization:  
   - Non-long-term use (e.g., event tents): 0.45mm standard type (40% cheaper than extra-heavy).  
   - Bulk orders (≥5000m2): Heavy-duty (0.7mm) at reduced unit price (e.g., ￥5.64/m2).  

> Golden Rule:  
> - Portability: Ultra-thin (0.3mm) for temporary/home use.  
> - Balance: Standard (0.55mm) for logistics/agriculture (best value).  
> - Extreme Protection: Heavy-duty (≥0.8mm) for industrial/hazardous environments.  
>  
> Future Trend: "Smart thickness" thermo-responsive coatings (R&D phase) for dynamic adaptability.  

All terms (e.g., phr = parts per hundred resin), units (N/5cm, GSM), and industry standards (RoHS, ISO) are preserved for technical accuracy.