Description
Consistent Roll Weight Verification — Every PVC coated tarpaulin roll is weighed and measured against its spec sheet before leaving the factory, ensuring the GSM you pay for is the GSM you receive.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | PVC Tarpaulin Roll |
| Weight (GSM) | 500 to 800 g/m² (range covers product family — confirm the grade for this item) |
| Coating Material | PVC |
| Waterproof Rating | anti-permeable ≥20KPa |
| Flame Retardant | ≤10 seconds (grade not stated) |
| Low-Temperature Flexibility | -30°C without fracture |
| Coating Method | Heat combined with high-frequency welding |
| Chemical Resistance | Acid, alkali and brine corrosion resistant |
| Anti-Mildew | Mildew proofing properties stated (test basis not stated) |
| Water Absorption | Almost no water absorption, fast drying |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Tarpaulin distribution and resale | Multiple GSM grades required for regional stock, consistent colour and weight across rolls |
| Truck side curtain fabrication | Constant flexing, road spray, tie-down abrasion at edges, UV exposure on highways |
| Tent and awning manufacturing | Fabric cut to pattern, welded seams at stress points, colour matching across large spans |
| Inflatable structure production | Air-holding membrane under tension, high-frequency welded seams, repeated inflation cycles |
What "Consistent GSM" Actually Means for Roll Stock Buyers
Verified weight per roll, documented on the pre-shipment inspection record before container loading.
When a container of PVC coated tarpaulin roll arrives and the material feels lighter than what was quoted, the loss shows up in tensile performance and coating adhesion. Distributors and fabricators who buy PVC coated tarpaulin roll stock by weight are paying for coating mass that directly determines waterproof integrity and weld strength. I have seen wholesale buyers receive rolls where the base fabric was correct but the coating layer was thinner than specified, leading to premature seam failure during fabrication [NEED_CITE: coating weight and tensile strength relationship per ISO 1421].
Roll-to-Roll Batch Control Across Multiple Grades
Stocking multiple GSM grades in a single container requires disciplined production scheduling. Each PVC coated tarpaulin roll in a mixed-grade order is produced on dedicated runs with coating weight checked at intervals during the coating process. This prevents the drift that occurs when line settings are adjusted mid-run without re-verification. Buyers ordering wholesale roll stock benefit from this discipline because it means the 650 GSM roll and the 550 GSM roll in the same shipment both meet their respective spec sheets.
Colour Matching Across the Entire Shipment
When two rolls from the same order are unrolled side by side, a visible colour shift signals inconsistent pigment dosing or curing temperature variation. For wholesale distributors reselling to end users, this inconsistency creates returns and complaints. Our batch mixing protocol ensures pigment is prepared for the full order quantity at once, so every PVC coated tarpaulin roll in your container carries the same colour reference [NEED_CITE: colour consistency testing methods for coated textiles].
How Coating Weight and Base Fabric Density Work Together
The GSM figure alone tells you the total mass per square metre but not how that mass is distributed between base fabric and coating. A 650 GSM roll with a dense, high-denier base fabric and thinner coating will tear differently than a 650 GSM roll with a lighter base and heavier coating. The heat combined with high-frequency coating method used here builds adhesion between layers that supports strong welded seams. Low-temperature flexibility down to -30°C means the PVC compound retains plasticity in cold-climate transit and storage, reducing the risk of cracking when rolls are unrolled in freezing conditions. Waterproof performance rated at anti-permeable ≥20KPa confirms the coating layer is continuous enough to block water penetration under sustained pressure.
The Hidden Cost of Under-Specified Roll Stock
A roll that is lighter than its quoted GSM does not just cost you in material — it costs you in fabrication failures. Welded seams on under-coated fabric fail at flex points because there is insufficient PVC mass to form a proper bond. Fabricators cutting truck side curtains from thin-coated rolls see seam peeling within months of road use. Distributors who stock under-weight rolls face warranty claims that erode margin far beyond the savings on the initial purchase [NEED_CITE: weld strength requirements for PVC coated fabric in transport applications].
Why Source PVC Tarpaulin Roll Stock Here
Three full production lines and 36 sets of professional equipment mean bulk roll orders are fulfilled without squeezing lead times or splitting production across subcontracted lines. A 10-person R&D team handles custom width and colour requests with sample development before full production runs. Dedicated QA/QC at every stage includes roll-by-roll weight verification and controlled-lighting colour checks. Pre-shipment inspection records document every roll against its spec sheet. Samples for custom grades are developed within days, allowing buyers to confirm material before committing to container volumes.
Documentation & Verification
- Material specification sheet stating exact GSM, base fabric denier and coating type per roll
- Roll packing list with individual roll weight, dimensions and roll count for container verification
- Pre-shipment inspection record with weight and colour consistency data per roll
- Certificate of origin and customs documentation package prepared for destination market
- Test reports for flame retardant and anti-UV grades where applicable — confirm the grade required
Fabrication, Handling & Storage
- High-frequency welding suits this PVC coating method, producing water-tight seams at flex points
- Store rolls upright on pallets to prevent flat-spot deformation of the coating surface
- Unroll at ambient temperature — cold rolls below -30°C flexibility threshold may crack if forced
- Clean with mild detergent only; harsh solvents degrade the PVC coating and chemical resistance layer
- Allow rolls to acclimatise before fabrication to ensure coating is at working temperature for welding
Requesting a Quotation
Provide the GSM grade, target width and total roll quantity so we can match stock availability or schedule a production run. Confirm whether you need standard widths or a custom width that requires line setup. Let us know if your market requires flame retardant or UV treatment documentation so the correct grade is specified from the start.
Frequently Asked Questions
Q: How is GSM verified per roll before shipment?
A: Every roll is sampled and weighed against the quoted specification during the pre-shipment inspection. The inspection record documents actual GSM per roll and accompanies the shipment documentation, so you can verify weight on arrival against our recorded data.
Q: Can I mix different GSM grades in one container?
A: Mixed-grade containers are supported. Each grade is produced on its own run to maintain coating weight accuracy, and the packing list identifies every roll by grade, weight and dimensions for easy sorting at your warehouse.
Q: How is colour consistency maintained across multiple rolls?
A: Pigment is batch-mixed for the entire order quantity before production begins. Rolls are checked under controlled lighting during the pre-shipment inspection to confirm no visible colour shift exists between any two rolls in the shipment.
Q: What is the container loading plan for roll stock?
A: Roll count, total weight and packing method are calculated per container size before dispatch. Rolls are packed upright on pallets with protective wrapping to prevent coating damage during ocean freight transit.
Q: How does MOQ work for custom widths versus standard stock?
A: Standard stock widths ship with lower minimums from existing production schedules. Custom widths require a dedicated line setup, and samples are produced for approval before the full run to confirm dimensions and coating quality.
