Deep Process Control Over Coating Weight — Verified at every production stage from base fabric weaving to final roll dispatch, ensuring the stated 650gsm matches what arrives on your loading dock.
Technical Specifications
| Parameter | Value |
|---|---|
| Specification | 12m by 12m PVC Trailer Tarpaulin Sheets 650gsm |
| Product Type | PVC Coated Tarpaulin Sheet |
| Base Fabric Yarn | 100% high toughness polyester yarn |
| Coating Material | PVC |
| Coating Method | Lamination technology and hot melt coating technology |
| Thickness | 0.35-0.45 mm (source value — verify against manufacturer catalog) |
| Tensile Strength (Longitude) | 1500-2000 N/5cm (test standard not stated in source) |
| Tensile Strength (Latitude) | 1200-1800 N/5cm (test standard not stated in source) |
| Color | Custom colors available |
| Flame Retardant | Available in flame retardant grades — confirm the grade required for your market |
| Anti-Static | Available with anti-static treatment — confirm surface resistance or standard required |
| UV Treatment | Anti-UV treatment available (test basis not stated in source) |
| Anti-Mildew | Mold proof |
| Cold Resistance | Cold resistant cracking |
| Waterproof | Waterproof |
| Eyelet & Hem Options | With eyelets |
| Weld Tear Strength | Excellent welding tear strength (value and standard not stated) |
| Color Fastness | Best color fastness (grade not stated in source) |
| Outdoor Durability | 3-5 years weather resistance (source value — verify against manufacturer catalog) |
| Standards | ISO certified, CE certified |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Heavy truck trailer covers | Continuous road vibration, tie-down strap abrasion, UV and rain exposure, flexing at load points |
| Engineering protective cloth | Dust and debris impact, site chemical splash, repeated folding and repositioning |
| Outdoor load coverage | Wind uplift stress, pooled water weight, long-term solar degradation |
| Weather-exposed transport | Highway-speed airflow drag, thermal cycling between day and night temperatures |
Why a Stated GSM Does Not Guarantee the Strength You Specified
Coating weight and base fabric density must be evaluated together — one number alone tells only part of the story.
When a technical buyer receives PVC coated tarpaulin 650gsm on the dock, the immediate check is a scale cut. But a roll that weighs correctly can still underperform if the coating-to-yarn ratio is off or if the base fabric denier is lighter than expected. I have seen coated fabrics pass the weight check yet tear at the weld line within weeks of installation [NEED_CITE: tensile and tear test methods for coated fabrics per ISO 1421]. The relationship between base yarn toughness, weave density, and the hot melt coating process determines whether the sheet handles real-world load stress or fails at the first flex point.
Base Fabric and Coating Adhesion Under Stress
The 100% high toughness polyester yarn used in this PVC coated tarpaulin 650gsm provides the structural skeleton. The lamination and hot melt coating technology bonds the PVC layer directly into the weave rather than sitting on the surface, which affects how the material behaves when folded, welded, or pulled tight over irregular loads.
Weld Integrity at Load Flex Points
When trailer covers are tensioned and released repeatedly during transit, the welded seams absorb cyclic stress. This material’s weld tear strength is rated excellent by the manufacturer, though the specific test standard is not published [NEED_CITE: weld peel strength testing per ISO 1421 or equivalent]. For fabricators building multi-panel truck covers, confirming the weld parameters against your own hot air welding setup is a necessary step before committing to a production run.
How GSM, Denier and Weave Density Interact
A 650gsm grade sits in the medium-heavy range for PVC coated fabrics. At this weight, the longitude tensile reaches 1500-2000 N/5cm and latitude reaches 1200-1800 N/5cm, though the test standard behind these figures should be confirmed for your specification document. The base fabric denier and weave count determine how much of that 650gsm is structural yarn versus coating mass — a higher denier with lighter coating gives different tear propagation behavior than a lighter denier with thicker PVC. The hot melt coating method typically produces stronger adhesion between coating and yarn compared to simple lamination, which matters when the fabric is cut and welded into finished covers. Thickness at 0.35-0.45 mm is consistent with a single-layer hot melt build at this weight class, balancing flexibility for folding with enough coating depth to resist abrasion [NEED_CITE: relationship between coating thickness and abrasion resistance in PVC tarpaulin].
What Happens When Material Specification Is Incomplete
Orders placed on GSM alone, without confirming base fabric denier or coating method, frequently result in material that measures correctly on the scale but does not perform in the field. Welds may delaminate under load cycling, or the fabric may crack along fold lines in cold conditions. For truck trailer applications where a cover failure means exposed cargo and potential liability, the cost of re-fabrication far exceeds the effort of requesting full material documentation up front [NEED_CITE: common causes of PVC tarpaulin field failures in transport applications].
Why Technical Buyers Source This Fabric Here
The 10-person R&D team supports material selection and sample development specific to your application, not generic catalog sales. Three full production lines with 36 sets of professional equipment handle volume orders while maintaining coating weight consistency across rolls. Dedicated QA/QC runs at every production stage with 100% inspection before shipment — each roll of PVC coated tarpaulin 650gsm is checked against the stated specification. Custom widths, colors and treatment combinations are developed as samples within days, allowing you to verify weld behavior and color match before full production. ISO and CE certification documentation ships with every order.
Documentation & Verification
- Material specification sheet listing GSM, base fabric yarn type and hot melt coating method
- Flame retardant and anti-UV test reports supplied when those treatments are specified
- Pre-shipment inspection record confirming weight and dimensional accuracy per roll
- ISO and CE certificates included with each shipment for customs and compliance
Fabrication, Handling & Storage
- Hot air welding temperature and speed must be matched to the 0.35-0.45 mm thickness for full seam adhesion
- Eyelet placement should account for the 650gsm weight to prevent pull-through under tie-down tension
- Rolls stored flat or upright on cores to prevent permanent creasing in the PVC coating layer
- Cold-condition unfolding requires care as cold resistant treatment reduces but does not eliminate cracking risk
- Clean with mild detergent only — solvent-based cleaners may degrade the hot melt coating surface
What to Include in Your Inquiry
Provide the specific trailer dimensions or cover application geometry, the target market and any fire classification or anti-static compliance requirements, and the color or print specification if applicable. Confirm whether you need finished sheets with eyelets and hems or roll stock for in-house fabrication, and state your expected annual volume so that batch consistency and lead time can be planned accordingly.
Frequently Asked Questions
Q: How is the 650gsm weight verified before shipment?
A: Every roll undergoes 100% pre-shipment inspection with GSM measurement recorded against the stated 650gsm specification. A weight verification record accompanies the shipment so you can cross-check on arrival.
Q: Which flame retardant grade is available for my market?
A: Flame retardant treatment is available, but the specific grade depends on your regional compliance requirements. Provide your target standard such as DIN 4102 B1 or NFPA 701, and the R&D team will confirm the matching formulation.
Q: What is the basis for the anti-UV treatment claim?
A: Anti-UV treatment is applied during coating, but the test method and exposure duration behind the weather resistance claim should be confirmed for your application. Request the test report and evaluate it against your local UV index conditions.
Q: How does the hot melt coating affect welding parameters?
A: The lamination and hot melt coating technology creates strong adhesion between PVC and polyester yarn, which generally supports reliable hot air welding. Fabricators should run weld samples at their standard temperature and speed settings to confirm seam strength.
Q: How is color consistency controlled across multiple sheets?
A: Color matching is managed through reference standards during production. For orders requiring multiple 12m by 12m sheets installed side by side, request a pre-production color sample for approval before the full batch runs.
