PVC Tarpaulin Purchasing FAQs & Solutions  
Common concerns when buying PVC tarpaulin involve material quality, performance gaps, and sizing. Below are data-driven solutions:  

I. Material & Craftsmanship Issues  
1. Q: How to identify low quality?  
   - Red Flags: Whitish/translucent surface, pinholes; stiff texture, cracks when bent; edge delamination (peel strength <25N/5cm).  
   - Solutions:  
     - Visual Check: Uniform color, smooth front + granular back.  
     - Bend Test: Thickness ≥0.45mm, no white creases.  
     - Craftsmanship: Choose vertically produced + heat-sealed edges.  

2. Q: PVC vs. PE/Canvas?  
   | Material | Waterproof | Durability    | Best For              |  
   |--------------|----------------|-------------------|---------------------------|  
   | PVC      | Excellent      | High              | Trucks/long-term outdoor  |  
   | PE       | Moderate       | Low               | Light-duty/short-term     |  
   | Canvas   | Low (needs wax)| Medium            | Temporary tents           |  
   - Solution: Use PVC for heavy-duty outdoor; PE for budget/light needs.  

II. Performance Deficiencies  
1. Q: Poor waterproofing?  
   - Causes: Uneven coating, pinholes, low fabric density (<12×12 threads/cm).  
   - Fix:  
     - Field test water beading; no leakage in 30 mins.  
     - Choose ≥480g/m2 density + 500D polyester base.  

2. Q: Rapid aging?  
   - Red Flags: Fading/cracking in <2 years; brittleness below -10°C.  
   - Fix:  
     - Demand UV stabilizers + cold-resistant additives (-30°C~+70°C).  
     - Check test reports for "UV resistance" and "low-temperature flexibility".  

3. Q: Weak tear resistance?  
   - Causes: Subpar base fabric or coating adhesion.  
   - Fix:  
     - Opt for knife-coated/laminated tarps (nylon-reinforced).  
     - Tear test: No delamination; minimal deformation when stretched.  

III. Sizing & Installation  
1. Q: Mismatched vehicle/tarp size?  
   - Risks: Incomplete coverage, detachment in storms.  
   - Fix:  
     - Customize tarps 30–50cm larger than vehicle dimensions.  
     - For curved roofs: Use elastic PVC-laminated fabric (prevents water pooling).  

2. Q: Sagging/water pooling?  
   - Causes: Sparse tie-downs, loose installation.  
   - Fix:  
     - Secure with cross-webbed straps (≤50cm intervals).  
     - Add 5° slope + drainage holes.  

IV. Safety & Eco-Issues  
1. Q: Toxic odor?  
   - Risk: Phthalate release (harmful indoors).  
   - Fix:  
     - Buy solvent-free silicone PVC (REACH-compliant); request SGS reports.  
     - Avoid stock >1 year old (plasticizers evaporate).  

2. Q: Low flame resistance?  
   - High-Risk Use: Warehouses/exhibitions.  
   - Fix:  
     - Specify B1-grade fire-retardant tarps (antimony trioxide); verify GB 8624 certification (China standard).  

V. Cost Traps  
1. Q: Recycled materials in cheap products?  
   - Trap: Tarps <￥6/m2 often contain scraps—lifespan <1 year.  
   - Fix:  
     - Compare prices (commercial-grade: ￥20–35/m2); verify weight via video.  
     - Economy (￥6.5–15/m2): Short-term  
     Commercial (￥20–35/m2): Trucks  
     Industrial (￥40–60/m2): Warehouses.  

2. Q: Inadequate warranty?  
   - Example: "Human damage" claim for peeling coating.  
   - Fix:  
     - Define warranty terms in contract (e.g., coating/seam failure = quality issue). Choose reputable brands (e.g., Jinxiang/Xiangyue).  

Maintenance & Emergency Tips  
- Cleaning: Neutral detergent + soft brush; dry thoroughly before storage.  
- Repairs: Patch small holes with adhesive; replace large tears.  
- Emergency Kit: Carry spare tarps + tie-downs on vehicles.  

 Golden Rule:  
> “Test waterproofing → Verify flexibility → Check certifications → Confirm size → Avoid ultra-cheap.”  
> For extended outdoor use: Commercial/industrial-grade PVC minimizes long-term costs.