Introduction
Truck Cover Fabric is a key component in logistics transportation to protect goods from rain, dust and ultraviolet rays. Its waterproof performance directly affects the safety of goods and the service life of the tarpaulin. However, there are many types of tarpaulin materials on the market with different waterproof technologies. Choosing a suitable waterproof tarpaulin has become a concern for many transportation companies and car owners.
This article will deeply analyze the waterproof principle, mainstream materials, coating process, performance test standards and purchase recommendations of truck cover fabric to help you make a wise decision.
1. Basic principles of truck cover fabric waterproofing
1.Waterproof vs Water-Resistant
| Characteristics | Waterproof | Water-Resistant |
| Waterproof level | Completely blocks water penetration | Can only resist slight splashing for a short time |
| Water pressure bearing capacity | ≥3000mm (ISO 811 standard) | Usually <1000mm |
| Applicable scenarios | Heavy rain, long-term rain | Light rain, short-term splashing |
Truck cover fabric usually needs to meet the real waterproof standard to ensure the safety of goods in bad weather.
2. Three mechanisms for waterproofing
Material density: High-density fabrics (such as PVC coated fabrics) can block water penetration by themselves.
Coating treatment: PU, PVDF and other coatings form a waterproof film on the surface.
Lamination technology: Multi-layer composite materials (such as PE film + polyester base fabric) enhance waterproofness.
2. Comparison of mainstream truck cover fabrics
1. PVC (polyvinyl chloride) coated cloth
Features:
Low cost, good wear resistance
Strong waterproofness (can withstand 5000mm water pressure)
Heavy weight (500-800g/m²)
Applicable scenarios: general freight, construction sites
2. PU (polyurethane) coated cloth
Features:
Lightweight (300-500g/m²)
Good flexibility, suitable for frequent folding
Waterproofness is slightly weaker than PVC (about 3000mm water pressure)
Applicable scenarios: light trucks, tarpaulins that need to be opened and closed frequently
3. PE (polyethylene) laminated cloth
Features:
Completely waterproof (100% impermeability)
Weak UV resistance
Commonly used for one-time or short-term use tarpaulins
4. High-tech composite materials (such as PVDF + polyester fiber)
Features:
Super waterproof (>10000mm water pressure)
Excellent weather resistance (UV resistance, acid and alkali resistance)
Higher price
Applicable scenarios: high-value cargo transportation, extreme climate areas
3. Key factors affecting waterproof performance
1. Base fabric material
Polyester: high strength, tear resistance, suitable for long-term use.
Nylon: lightweight and flexible, but easy to age under long-term exposure.
2. Coating/lamination process
| Process type | Waterproofness | Durability | Cost |
| Single-sided coating | Medium | 1-3 years | Low |
| Double-sided coating | High | 3-5 years | Medium |
| Three-layer composite (TPU) | Very high | 5-8 years | High |
3. Seam processing technology
Ordinary stitching: easy to leak, need additional tape to seal.
Heat welding: no pinholes, completely waterproof (standard for high-end tarpaulins).
4. Waterproof performance test standard
1. Hydrostatic pressure test (ISO 811/AATCC 127)
Method: Apply water pressure on one side of the fabric and measure the pressure value when water seeps in.
Truck cover fabric requirements: ≥3000mm water column (can resist heavy rain).
2. Spray test (AATCC 22)
Simulate rain scouring to evaluate the surface's ability to repel water.
Scoring standard: Level 1 (complete penetration) → Level 5 (completely water-free).
3. Abrasion test (ASTM D3884)
Check whether the waterproof layer is damaged after repeated friction.
Qualification standard: Still waterproof after ≥5000 frictions.
5. How to choose a highly waterproof truck cover fabric?
1. Clear demand
Ordinary short-distance transportation: PVC coated cloth (cost-effective).
Long-distance/high-value goods: PVDF composite cloth (super durable).
Frequent folding and use: PU coated cloth (lightweight and flexible).
2. Check product certification
Waterproof standard: ISO 811 ≥ 3000mm.
Environmental certification: OEKO-TEX® (harmless coating).
3. Field test recommendations
Water splashing test: Pour water to see if water drops form and roll down.
Joint inspection: Pull the joint hard to see if it is debonded.
6. Maintenance to extend waterproof life
Cleaning: Rinse with clean water regularly to avoid mud and sand from wearing the coating.
Storage: Fold and store in a dry and ventilated place to avoid mildew.
Repair: Repair with special adhesive tape in time when damage is found.
Conclusion
The waterproof performance of truck cover fabric depends on material selection, coating process and joint treatment. For transportation scenarios that often encounter rain and snow, it is recommended to choose high hydrostatic pressure tarpaulins (≥ 5000mm) with PVC or PVDF coatings, and give priority to heat-sealed seam processes. Investing in high-quality waterproof tarpaulins can not only protect the safety of goods, but also reduce long-term replacement costs.
Remember: a true waterproof tarpaulin is not "waterproof", but "waterproof even if soaked for a long time". Be sure to ask for a test report when purchasing to ensure that it meets industry standards!
