Coating Process Control — Our 10-person R&D team oversees every production stage for PVC coated tarpaulin, ensuring the 400g GSM and coating adhesion meet technical fabric specifications before dispatch.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | PVC Coated Tarpaulin |
| Weight | 400 GSM |
| Total Thickness | 0.3mm |
| Base Fabric Denier | 500D-500D Polyester |
| Material Composition | PVC & Polyester |
| Coating Material | PVC |
| Surface Finish | Plain, Smooth |
| Color | Blackout |
| Flame Retardant | Available (confirm grade required for your market) |
| Anti-Static | Available (confirm certification required for your market) |
| UV Resistance | Anti-UV treatment available (grade not stated) |
| Key Features | Water Resistant, Waterproof |
| Standards | ISO, CE |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Mining Ventilation Ducts | Continuous airflow pressure, underground moisture, strict fire-retardant compliance |
| Tunnelling Air Ducts | High humidity, abrasion from particulate matter, anti-static requirements |
| Aviation Temporary Ducting | Flame-retardant certification, flexibility for rapid deployment |
| Inflatable Structures | Air retention, dimensional stability under internal pressure |
| Membrane Covers | UV exposure, wind load, welded seam integrity |
Why "Flame Retardant" Without a Grade Fails the Site Inspection
A claimed fire rating is only as reliable as the test certificate that accompanies the roll.
PVC Coated Tarpaulin 400g fire retardant anti-static certified is frequently specified for mining and aviation ducting, yet fabricators often receive material with no documentation to support the claim [NEED_CITE: fire classification standards for underground ventilation materials]. When the inspector asks for the test report, a vague "flame retardant" statement on the quotation is insufficient. We supply fire-retardant grades with the specific test standard — M2, B1 per DIN 4102, or NFPA 701 — matched to the compliance regime of your project site.
Airflow Load and Base Fabric Stability
Ventilation ducts require a base fabric that resists stretching and deformation under continuous positive or negative pressure. The 500D-500D polyester yarn count provides the dimensional stability needed to maintain duct geometry. PVC Coated Tarpaulin 400g fire retardant anti-static certified delivers a balanced construction where the coating weight supports the base without adding unnecessary mass to suspended duct runs.
Seam Integrity at Flex Points
Most ventilation duct failures occur where the fabric flexes repeatedly — typically at bends, transitions, and connection points. The 0.3mm total thickness allows hot-air welding to penetrate the PVC coating and fuse consistently without burning through the polyester base. This welding behaviour is critical for fabricators producing long duct runs that must withstand vibration and pressure pulsing [NEED_CITE: tensile and tear test methods for coated fabrics per ISO 1421].
Reading the GSM in Context
The 400 GSM specification combines the weight of the 500D-500D polyester base and the PVC coating on both sides. A heavier coating does not automatically mean higher tensile strength; the denier and weave density of the base fabric are equally important. For duct applications, the 0.3mm thickness provides sufficient coating depth for reliable heat-welded seams while maintaining the flexibility required for folding and deployment in confined underground environments.
The Cost of Inadequate Certification
When anti-static or fire-retardant documentation does not match site requirements, the entire duct installation can be rejected at inspection. Fabricators face rework costs, project delays, and contractual penalties [NEED_CITE: mining ventilation safety compliance documentation]. Sourcing PVC coated tarpaulin without verified test reports means absorbing that risk. Our dispatch documentation includes the specific grade certificate so that the material can be traced back to the test that supports its use in regulated environments.
Sourcing Technical Fabric from a Dedicated Line
Our three full production lines and 36 sets of professional equipment support bulk roll output with consistent coating weight across the batch. The 10-person R&D team handles material selection and sample development for technical applications like ventilation ducts and inflatable structures. Dedicated QA/QC inspection at every stage ensures the 400 GSM and 500D-500D base fabric match the specification sheet before any roll is packed. Nearly 30 years of coated fabric production informs our process control over adhesion and coating uniformity.
Documentation & Verification
- Material specification sheet stating 400 GSM, 500D-500D base denier, and PVC coating method
- Fire-retardant test report with grade matched to mining or aviation site requirements
- Anti-static surface resistance certificate for underground duct applications where mandated
- Pre-shipment inspection record verifying weight and coating consistency per roll
- Roll packing list and certificate of origin included with every dispatch
Fabrication, Handling & Storage
- Hot-air weld temperature must suit 0.3mm PVC coating thickness for consistent seam fusion
- Store rolls upright on pallets to prevent creasing the 500D-500D polyester base fabric
- Unroll blackout PVC coated tarpaulin flat before welding to release tension and avoid puckered seams
- Cut with rotary or straight blade suited to 400 GSM weight for clean edges before hemming
- Avoid stacking heavy objects on stored rolls to prevent permanent surface impressions on the plain finish
Request a Technical Specification Match
Provide your project’s fire-retardant grade requirement, anti-static certification standard, and the duct diameter or structure dimensions you are fabricating. Confirm whether you need rolls in standard widths or custom lengths for your production run, and indicate the annual volume for pricing structure alignment.
Frequently Asked Questions
Q: What fire-retardant grades are available for mining ventilation duct compliance?
A: We supply PVC coated tarpaulin in flame-retardant grades including M2, B1 per DIN 4102, and NFPA 701. The grade must match your site’s safety code, so provide the specific standard required. We issue a test report documenting the achieved grade before dispatch for inspector verification.
Q: How is anti-static certification measured for underground duct applications?
A: Anti-static treatment is verified by surface resistance measurement per the standard your mining or tunnelling code mandates. We provide a certificate stating the measured resistance value. Confirm the required threshold with your safety officer so we match the treatment grade to your compliance documentation.
Q: What roll widths and lengths are available for duct fabrication runs?
A: Rolls are supplied in widths suited to standard duct diameters and can be customised for specific fabrication patterns. Length per roll is adjusted to minimise waste on your production line. Provide your typical duct circumference and run length so we recommend the most efficient roll format for your cutting layout.
Q: How does the 500D-500D base at 400 GSM behave during hot-air welding?
A: The 0.3mm total thickness allows heat to penetrate the PVC coating and bond at the seam without damaging the polyester base. Weld parameters should be calibrated to this specific GSM and coating weight. We recommend producing test welds from sample material before committing to full production runs.
Q: Is colour and coating consistency maintained across multiple rolls in one order?
A: Every production batch undergoes in-process QA to control coating weight and colour uniformity. For blackout PVC coated tarpaulin, consistency across rolls is verified before packing. If your project requires multiple rolls installed side by side, note this on your order so we prioritise batch matching during production scheduling.
