Deep coating process control — every roll of 650gsm PVC coated tarpaulin undergoes weight verification at the coating head, ensuring the stated GSM and 0.46mm thickness match what arrives at your inspection table.
Technical Specifications
| Parameter | Value |
|---|---|
| Specification | 650gsm 1000D*1300D |
| Product Type | PVC Coated Tarpaulin Roll |
| Base Fabric | 1000D×1300D polyester yarn |
| Mesh Count | 20×20 |
| Coating Material | PVC, double-sided |
| Total Thickness | 0.46 mm |
| Weight | 650 GSM |
| Tensile Strength (Warp) | 2550 N |
| Tensile Strength (Weft) | 2250 N |
| Surface Finish | Smooth, leather-like texture |
| Flame Retardant | Available in flame retardant grades — confirm the grade required for your market |
| UV Treatment | Anti-UV treatment available — confirm test basis for your application |
| Waterproof Performance | Fully waterproof coated construction with overall sealing |
| Repairability | Repairable by hot air welding |
| Colour | Custom colour options |
| Packaging | Roll packing, bale packing, carton |
| Standards | ISO, CE |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Truck and trailer covers | Constant road vibration, flexing at load points, weather and UV exposure, abrasion from tie-down straps |
| Machine and equipment covers | Outdoor storage, dust and moisture ingress, repeated uncovering and re-draping |
| Awning and tent fabric | Sustained tensile load on frame, wind-driven rain, sun exposure, frequent folding and unfolding |
| Side curtain systems | Continuous flex cycles during loading operations, road salt and spray, edge abrasion at track rails |
| Wood and timber covers | Prolonged moisture contact, sap and resin staining, UV degradation on yard-stored stock |
Why the GSM on the Quotation Does Not Always Match What Arrives
A 650gsm PVC coated tarpaulin must be verified at the coating head, not just declared on paper.
Technical buyers have received rolls where the stated weight did not survive the journey from quotation to loading dock. The gap usually sits in the coating layer: some suppliers quote total GSM based on a target figure, but the actual PVC coating weight fluctuates across the production run. A roll that reads 650 GSM on the spec sheet may arrive closer to 600 GSM once you cut a sample and weigh it. [NEED_CITE: common variance in coated fabric GSM between quotation and delivered rolls] For a PVC coated tarpaulin 650gsm polyester base fabric, that shortfall directly reduces tensile capacity and shortens the service interval before replacement.
Coating Weight Versus Total Weight: What the Numbers Actually Mean
When you specify a PVC coated tarpaulin 650gsm polyester base fabric, the total weight combines the base polyester fabric and the PVC coating applied to both sides. The 1000D×1300D base yarn at 20×20 mesh density accounts for a significant portion of that total. Understanding how much of the 650 GSM comes from the coating itself — versus the woven scrim — tells you how the material will behave under abrasion and flex fatigue. A heavier coating provides more sacrificial material before the base yarn is exposed.
How the 1000D×1300D Base Fabric Drives Tensile Performance
The warp yarn runs at 1000 denier and the weft at 1300 denier, creating an asymmetric construction that distributes load differently in each direction. The warp tensile of 2550 N and weft tensile of 2250 N reflect this imbalance. For truck covers and side curtains where the fabric stretches across a frame in one primary direction, knowing which axis carries the higher load determines how you orient the roll during cutting.
Reading the Specification Sheet Beyond the Headline GSM
A 650 GSM total weight with 0.46 mm total thickness and a 20×20 mesh count gives you three interlocking values to cross-check. Thickness indicates how much PVC sits above and below the scrim — at 0.46 mm, the coating provides a continuous barrier while keeping the material flexible enough for folding. The mesh count of 20×20 means twenty yarns per inch in both directions, which directly influences how the fabric resists tear propagation once a puncture occurs. [NEED_CITE: relationship between mesh count and tear propagation in coated polyester fabrics per ISO 1421] Together these values let you compare this PVC coated tarpaulin 650gsm polyester base fabric against alternative constructions on a like-for-like basis, rather than relying on GSM alone.
Knife Coating and Its Effect on Adhesion and Weldability
The PVC coating applied to this 1000D×1300D base fabric bonds to the polyester yarn through a knife-over-roll coating process, where liquid PVC compound is drawn across the moving scrim under controlled tension. This method forces the coating into the gaps between yarns, creating a mechanical lock that resists delamination under flex stress. For fabricators who hot-air weld seams, the consistency of coating thickness across the roll width determines whether weld temperature and speed can remain constant — uneven coating leads to weak spots at the seam. The smooth, leather-like surface finish of this PVC coated tarpaulin 650gsm polyester base fabric supports predictable weld behaviour when parameters are set correctly.
The Cost of Accepting Rolls Without Batch-Level Verification
A delivery of multiple rolls with unverified coating weight creates downstream problems that surface only during fabrication or installation. Rolls that fall below the stated 650 GSM may weld at lower temperatures than expected, producing seams that fail before the fabric body does — often at the exact point where the load flexes most. Colour variation between rolls in the same shipment becomes visible once panels are installed side by side on a trailer or awning frame. [NEED_CITE: field reports of seam failure at flex points on coated tarpaulin installations] These defects are not caught by a visual inspection alone; they require weight sampling and colour comparison under standardised lighting before the rolls leave the supplier’s warehouse.
Procurement Advantages Backed by Process Evidence
Every roll of 650gsm PVC coated tarpaulin passes through dedicated QA/QC checkpoints at the coating head, the curing oven, and the winding station, with 100% inspection before dispatch. The 10-person R&D team develops custom colour matches and sample cuts within days, letting you confirm hand feel and shade before authorising bulk production. Three full production lines with 36 sets of equipment maintain output volume without sacrificing coating weight consistency. The knife coating process used on the 1000D×1300D base fabric produces the uniform coating thickness needed for reliable hot-air welding in your workshop. Sample development includes the exact PVC compound formulation intended for the production run, eliminating the mismatch that occurs when samples are made on a different line.
Documentation & Verification
- Material specification sheet confirming 650 GSM, 1000D×1300D base fabric, and 0.46 mm thickness per roll
- Colour reference card matching the Pantone or RAL code specified at order placement
- Test reports for UV and flame-retardant grades supplied where applicable to your order
- Pre-shipment inspection record showing GSM verification and visual defect count
- ISO and CE certificates included with every container shipment
- Roll packing list with net weight, gross weight, and roll dimensions for customs clearance
Fabrication, Handling & Storage
- Hot air weld temperature should be calibrated to the 0.46 mm total thickness before production seam trials begin
- Orient the 1000D warp direction parallel to the primary tensile load when cutting truck cover panels
- Store rolls upright on pallets to prevent flat-spot deformation of the PVC coating surface
- Allow cold-transported rolls to reach workshop temperature before unrolling to avoid coating crack at the core
- Clean the smooth leather-like surface with neutral pH detergent to avoid damaging the PVC coating layer
- Repair field punctures using hot air welding with compatible PVC strip rather than adhesive patches
What We Need to Prepare Your Quotation
To specify this PVC coated tarpaulin 650gsm polyester base fabric accurately, provide the intended application and the environmental conditions it will face — including UV exposure duration, temperature range, and any flame-retardant or anti-static requirements for your market. Confirm the roll widths and lengths you need, along with colour references and whether you require printed branding. Let us know your annual volume and target delivery schedule so we can plan production line allocation accordingly.
Frequently Asked Questions
Q: How do I verify that the 650 GSM stated on the quotation matches the rolls I receive?
A: Every roll undergoes weight verification during our 100% pre-shipment inspection. We record the actual GSM from sample cuts taken at the head, middle, and tail of each roll. You receive a pre-shipment inspection record with these values before dispatch, allowing you to reconcile the delivered weight against the quoted 650 GSM figure before the container leaves our facility.
Q: Which flame-retardant grades are available for this 650gsm PVC coated tarpaulin?
A: Flame-retardant treatment is available as a custom option, but the specific grade depends on the compliance requirements of your destination market. We supply test reports matched to the applicable standard once you confirm which grade your project requires. Provide your target certification or local building code reference at the inquiry stage so we can align the formulation.
Q: How is anti-UV treatment validated and what test documentation do you provide?
A: Anti-UV treatment can be incorporated into the PVC coating compound for this 1000D×1300D base fabric. The test basis and exposure duration ratings depend on the specific additive package selected for your order. Request the UV test report during the sample approval stage so you can evaluate performance data before committing to bulk production.
Q: How do you control colour consistency across multiple rolls in a single order?
A: Our 10-person R&D team prepares a colour reference sample using the same PVC compound batch intended for your production run. During manufacturing, rolls are compared against this reference under standardised lighting. Any roll showing a visible deviation is flagged and removed before packing, ensuring panels installed side by side show no perceptible colour shift.
