Precision Coating Weight Control — verified GSM on every roll of 650gsm PVC coated polyester base fabric, backed by stage-by-stage QA and pre-shipment inspection records.
Technical Specifications
| Parameter | Value |
|---|---|
| Specification | 650gsm PVC Coated Tarpaulin Roll, 1000D×1300D, 0.46mm, 20×20 |
| Product Type | PVC Coated Tarpaulin Roll |
| Weight | 650 GSM |
| Base Fabric Denier | 1000D×1300D |
| Total Thickness | 0.46 mm |
| Mesh Count | 20×20 |
| Tensile Strength (Warp) | 2550 N (test basis not stated in source) |
| Tensile Strength (Weft) | 2250 N (test basis not stated in source) |
| Coating Material | PVC & Polyester |
| Surface | Smooth, soft, leather-like texture |
| Key Features | Water Resistant, Waterproof, Anti-UV (grade not stated), Flame Retardant (grade not stated) |
| Repairability | Hot air weldable |
| Available Family Grades | 350, 400, 420, 500, 600, 650, 750, 900 GSM |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Truck and trailer side curtains | Constant flexing at load points, road spray abrasion, UV exposure, requires reliable hot air weld seams |
| Large-format tent and awning fabrication | Prolonged outdoor weathering, wind load tension on panels, colour consistency across adjoining sections |
| Inflatable and membrane structures | Internal air pressure stress, seam integrity under cyclic loading, flame retardant compliance for public venues |
| Industrial machine and equipment covers | Contact with oils and particulates, repeated removal and refitting, abrasion at contact edges |
| Wood and cargo yard covers | Stacked weight load, moisture ingress prevention, resistance to fungal growth in humid storage |
Why GSM Alone Does Not Define the Strength of a 650gsm PVC Tarpaulin Roll
A quoted 650 GSM figure only holds value when the base fabric denier, weave density, and coating adhesion are specified and verified together.
Buyers regularly receive rolls that match the stated GSM on the label but fail prematurely because the coating-to-fabric bond was weak, or the base yarn was lighter than specified. A heavy coating applied over a low-denier base can inflate the GSM reading while leaving the fabric vulnerable to tear propagation under load [NEED_CITE: tensile and tear test methods for coated fabrics per ISO 1421]. The real measure of a PVC coated tarpaulin roll lies in how the 1000D×1300D polyester base interacts with the PVC coating at the molecular level, not in a single weight number.
Base Fabric Architecture and Load Distribution
The 1000D×1300D denier combination places heavier yarns in the weft direction, creating an asymmetric strength profile that suits applications where lateral forces dominate. Truck side curtains experience peak stress across the width when wind loads push against the trailer body during transit. A 20×20 mesh count balances yarn density with coating penetration, ensuring the PVC fills the interstices without creating stiff ridges that crack under repeated folding.
Coating Thickness and Environmental Resistance
At 0.46 mm total thickness, this 650gsm PVC tarpaulin roll provides a coating mass sufficient to encapsulate the base fabric fully, preventing moisture ingress at yarn crossover points. The double-sided PVC coating creates a continuous barrier that resists water penetration and limits fungal colonisation on the fabric surface. Available in flame retardant grades — confirm the grade required for your market before specifying [NEED_CITE: fire classification standards for textile membrane structures].
Tensile Figures and What They Mean in Practice
The warp tensile reading of 2550 N and weft reading of 2250 N reflect the contribution of the 1000D×1300D yarn structure. These values indicate how the material behaves under steady pull, but they do not capture tear initiation or weld line behaviour. For fabricated covers that undergo cutting and seaming, the adhesion strength between coating and base fabric determines whether a seam holds or delaminates before the fabric body itself reaches its tensile limit.
The Cost of Overlooking Adhesion and Batch Consistency
Rolls that pass a GSM spot-check but carry inconsistent coating weight across their width produce visible colour variation once panels are installed side by side on a truck or tent frame. Weld seams made on material with poor coating adhesion fail at the exact point where the load flexes most, leaving the fabric intact but the joint open [NEED_CITE: common failure modes in fabricated PVC tarpaulin assemblies]. Batch-to-batch colour drift forces fabricators to reject entire shipments or accept a patchwork appearance that damages their own reputation with end clients.
Why Procurement Teams Source This Grade Here
Three full production lines and 36 sets of professional coating equipment give this facility the capacity to run 650gsm PVC tarpaulin roll orders at volume while maintaining coating weight consistency from the first metre to the last. A 10-person R&D team handles custom width requests and colour matching with sample turnaround measured in days, not weeks. Every roll undergoes 100% inspection before shipment, with documented GSM verification rather than random sampling. The coating process control developed over decades of operation ensures the adhesion between PVC and 1000D×1300D polyester base meets fabrication demands for hot air welding and high-frequency seaming.
Documentation & Verification
- Material specification sheet stating 650 GSM, 1000D×1300D base, 0.46 mm thickness, and coating composition
- UV resistance and flame retardant test reports matched to the specific grade ordered
- Pre-shipment inspection record with per-roll GSM verification against quoted weight
- Roll packing list detailing individual roll widths, lengths, and batch numbers
- Certificate of origin and customs documentation for international shipment
Fabrication, Handling & Storage
- Hot air weld temperature and speed should be calibrated to the 0.46 mm thickness for consistent seam strength
- Store 650gsm rolls upright on pallets to prevent flat-spot deformation of the PVC coating surface
- Allow cold-stored rolls to reach ambient temperature before unrolling to avoid coating micro-cracking
- Use cutting blades suited to 1000D×1300D denier fabric to prevent yarn fraying at cut edges
- Clean with mild detergent only; solvent-based cleaners may degrade the PVC surface finish
What to Include in Your Enquiry
Specify the end-use application and the environmental conditions the fabricated product will face, including any flame retardant grade required by local building or transport regulations. State the roll width and length you need, your annual volume estimate, and whether you require custom colour matching or standard stock shades. Confirm if you need the material supplied as roll stock only or if you also require cut-to-size panels with hemming and eyelet reinforcement.
Frequently Asked Questions
Q: What is the GSM tolerance range on each roll of 650gsm PVC tarpaulin?
A: Each roll is weighed and measured individually during pre-shipment inspection. The actual GSM is recorded on the packing list so you can verify it against your purchase specification upon receipt. We document the measured value rather than relying on a production target figure, giving you traceability from our coating line to your receiving dock.
Q: What test standard is used to measure adhesion strength between the PVC coating and polyester base?
A: Adhesion strength testing follows recognised coated fabric test methods that measure the force required to separate the coating from the base fabric. This is critical for materials destined for hot air welding, as poor adhesion causes seam failure before the fabric body reaches its tensile limit. Request the adhesion test report with your sample shipment to evaluate weld compatibility.
Q: Can the PVC formulation be adjusted for different welding processes?
A: Yes. The R&D team adjusts plasticiser ratios and coating composition depending on whether you use hot air welding or high-frequency welding on your fabrication line. Different welding methods require different surface characteristics for optimal seam integrity. Provide details of your welding equipment and we will develop a sample matched to your process parameters.
Q: How do you maintain colour consistency across multiple rolls in one order?
A: Colour matching is controlled at the compounding stage, with reference samples checked against each production batch. All rolls within a single order are produced from the same coating compound batch to eliminate shade variation. If your project requires panels installed side by side, we recommend ordering the full quantity in one production run to ensure uniform appearance.
