Deep Coating Process Control — every roll of PVC coated tarpaulin fabric ships with a material specification sheet stating exact GSM, base fabric denier, and coating weight, enabling independent verification at your receiving dock.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | PVC Coated Tarpaulin Fabric |
| Coating Material | PVC (100% PES dipping coating process) |
| Construction | Knitting / Plain Weave |
| Base Fabric Denier (Medium-duty) | 500D |
| Weight (Medium-duty) | 400-500 g/m² |
| Thickness (Medium-duty) | 0.35-0.45 mm |
| Tensile Strength (Medium-duty) | Warp 1500-2000 / Weft 1200-1800 N/5cm (test basis not stated) |
| Base Fabric Denier (Heavy-duty) | 1000D |
| Weight (Heavy-duty) | 700-1000 g/m² |
| Thickness (Heavy-duty) | 0.70-1.0 mm |
| Tensile Strength (Heavy-duty) | Warp 2000-2500 / Weft 1800-2200 N/5cm (test basis not stated) |
| Base Fabric Denier (Super Heavy-duty) | 500D-2000D |
| Weight (Super Heavy-duty) | 1100-1500 g/m² |
| Thickness (Super Heavy-duty) | 1.2-1.5 mm |
| Tensile Strength (Super Heavy-duty) | Warp 2500-3000 / Weft 2200-2800 N/5cm (test basis not stated) |
| Roll Width Options | 2m / 4m / 6m (or 6ft / 8ft / 10ft / 12ft) |
| Roll Length Options | 100 yards / 100 meters / custom |
| Key Features | Waterproof, Washable, Tear Resistant, Mildew Proof, Anti-aging, UV Treatment Available |
| Colour Options | Blue, Blue/Orange, Green, Grey, Black, Clear, Grey/Green, Orange, or custom |
| Standards | ISO, CE |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Truck and trailer side curtains | Constant flexing at load points, road abrasion, UV exposure, wind load on tie-downs |
| Tent and tensioned structure membranes | Permanent outdoor weathering, structural tension loads, weld seam integrity under stress |
| Industrial pipe canopy covers | UV and rain exposure, chemical splash contact, mechanical puncture from equipment handling |
| Lumber, steel and coil tarps | Heavy abrasion from rough cargo surfaces, repeated folding and deployment cycles |
| Engineering protective cloth | Dust and moisture ingress prevention, moderate mechanical contact on construction sites |
Why Stated GSM Alone Fails as a Procurement Specification
GSM without base fabric denier and coating weight breakdown tells you nothing about how the PVC coated tarpaulin fabric will perform under load.
Technical buyers routinely specify a target GSM on the purchase order, then receive rolls that meet the weight but fail at the weld line or tear prematurely under tension. The reason is straightforward: two fabrics can share the same GSM while having entirely different base fabric constructions and coating ratios. A 650 g/m² roll built on a 500D base with heavy coating will handle completely differently from a 650 g/m² roll built on a 1000D base with lighter coating. The first will have more coating mass contributing to weight but less structural yarn to resist tearing. The second will show higher tensile values but may be stiffer and harder to fabricate. [NEED_CITE: relationship between base fabric denier and coating ratio in determining tensile performance]
How Coating Weight and Base Fabric Denier Interact
The 100% PES dipping coating process used for this PVC coated tarpaulin fabric drives PVC into the interstices of the base yarn, creating a mechanical bond rather than a surface laminate. With 500D base fabric in the medium-duty tier, the coating fills a finer weave structure, producing a flexible material suited to applications requiring repeated folding. At the heavy-duty tier, the 1000D base provides thicker yarn bundles that accept deeper coating penetration, yielding higher tensile values in both warp and weft directions. The super heavy-duty tier extends denier options up to 2000D, where the base fabric itself carries the majority of the structural load and the coating serves primarily as environmental protection.
What the Dipping Process Means for Delamination Resistance
In a dipping coating process, the base fabric passes through a PVC bath, allowing the compound to saturate the yarn structure rather than sitting on the surface as a film. This saturation creates coating-to-yarn adhesion across the full thickness of the fabric, not just at the top and bottom faces. For applications where the material flexes repeatedly — such as truck side curtains that billow under highway wind loads — this full-depth adhesion reduces the risk of coating separation at flex points. [NEED_CITE: coating adhesion test methods for dipped versus laminated PVC fabrics] The result is a material where the coating and base fabric behave as a single composite under stress, rather than two layers that can separate over time.
Reading the Tensile and Tear Data Across Grade Tiers
Tensile strength values for this fabric family range from 1500-2000 N/5cm warp in the medium-duty tier to 2500-3000 N/5cm warp in the super heavy-duty tier. These numbers are driven primarily by base fabric denier and knitting density, not by coating thickness alone. When specifying for a tensioned structure or a heavy truck tarpaulin that must resist wind load on tie-down points, the base fabric denier is the more meaningful selection criterion. A higher denier base with a tighter weave resists tear propagation — the failure mode that matters most once a puncture or cut initiates in the field. Coating weight contributes to abrasion resistance and surface durability but adds less to the structural tear rating.
The Hidden Cost of Specifying on GSM Without Denier Data
When a procurement decision rests on GSM alone, the consequences surface after the material is fabricated and installed. Rolls that meet the weight target but use a lighter base fabric with heavier coating will pass incoming inspection, then fail at welded seams because the coating-to-yarn bond has to carry loads the base fabric should be handling. Colour variation between rolls from the same shipment becomes visible once panels are installed side by side on a truck trailer or tent structure — a problem rooted in inconsistent coating thickness across production runs rather than pigment formulation. [NEED_CITE: batch-to-batch colour consistency in PVC coated fabric manufacturing] Weld seam failures at high-stress flex points typically trace back to coating that was too thick for the heat welding parameters used, creating a brittle joint that cracks before the surrounding fabric shows any sign of wear.
Why Material Process Control Matters at the Source
Three full production lines with 36 sets of professional equipment provide capacity to run your volume while maintaining parameter consistency across every roll in the order. A 10-person R&D team handles material selection, custom width development, and sample production, with samples developed within days for custom GSM, denier, or colour requirements before you commit to bulk. Dedicated QA/QC operates at every production stage — base fabric inspection before coating, in-process coating weight checks, and 100% pre-shipment inspection covering weight verification and visual defect screening. Nearly 30 years of focused production on coated fabric has built the process knowledge needed to control coating adhesion, colour consistency, and GSM accuracy across long production runs. ISO and CE certified production supports export documentation requirements across North American, European, and Asian markets.
Documentation & Verification
- Material specification sheet stating GSM, base fabric denier, and coating weight per roll for incoming verification
- Test reports for UV treatment grades matched to the specific product grade ordered
- Pre-shipment inspection record covering weight spot-checks and visual defect screening across the full order
- Colour reference documentation enabling roll-to-roll consistency verification at your facility
- ISO and CE certificates included with customs and shipping documentation
Fabrication, Handling & Storage
- Heat welding parameters must be adjusted to the specific GSM tier — medium-duty 400-500 g/m² requires lower temperature than super heavy-duty 1100-1500 g/m² grades
- Roll storage on flat, padded racks prevents permanent creasing that compromises the dipping coating bond at fold lines
- Galvanized eyelets at 1-meter intervals with PP rope hem distribute tie-down load across the reinforced edge rather than concentrating stress at single points
- Cutting layout should account for the 2m / 4m / 6m roll width options to minimise waste and reduce the number of welded seams in the finished product
- Clean with mild detergent only — solvent-based cleaners can degrade the PVC coating surface and reduce long-term weathering resistance
What to Include in Your Material Enquiry
Provide the end-use application, expected mechanical loads, and environmental exposure conditions so the correct grade tier and denier can be recommended. Specify your target market’s fire safety or compliance requirements where applicable — available in flame retardant grades, and the specific grade required should be confirmed for your market. State required roll widths, annual volume, and whether you need fabric rolls or finished cut-size tarpaulins with eyelets and edge reinforcement. Request sample development for custom colour or GSM requirements before placing the bulk order.
Frequently Asked Questions
Q: How do you guarantee the GSM on the quote matches what is delivered?
A: Every roll ships with a material specification sheet stating the exact GSM, base fabric denier, and coating weight. Our 100% pre-shipment inspection includes weight spot-checks across the order. You can verify incoming material against the purchase order using standard fabric weight testing methods at your receiving dock.
Q: What test reports accompany UV-treated and flame-retardant grades?
A: Test reports are available for UV treatment and flame-retardant grades where applicable, matched to the specific product grade you order. Request the documentation during the specification stage so the correct grade is selected for your market’s compliance requirements before production begins.
Q: Can you match a specific colour reference across multiple roll orders?
A: Colour references are documented on the material specification sheet for each production run. We recommend requesting swatch cards from the production batch before full shipment to verify roll-to-roll consistency. Custom colour development samples are produced within days for approval before bulk commitment.
Q: What is the relationship between GSM, denier, and tensile strength?
A: GSM reflects total weight including both base fabric and coating. Tensile strength is driven primarily by base fabric denier and weave density — a 1000D base at 700-1000 g/m² delivers higher structural strength than a 500D base at the same GSM. Specify on denier and tensile requirements, not GSM alone.
Q: How are welded seams tested against the fabric’s rated tear strength?
A: Heat welding parameters are calibrated to the specific GSM tier and coating composition. The dipping coating process creates full-depth saturation that supports strong weld adhesion. We recommend weld testing on sample material at your fabrication facility to establish the correct temperature and dwell time for your equipment.
