Coating Weight Control — Every roll of PVC coated tarpaulin is measured at the coating head and verified again at pre-shipment inspection, ensuring the GSM you approved on the sample is the GSM that arrives at your warehouse.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | PVC Tarpaulin / Pond Liner Fabric |
| Base Fabric | High-strength polyester mesh fabric |
| Coating Material | PVC |
| Coating Technology | Laminated technology & Hot-melt coating technology |
| Weight (GSM) | 350gsm / 420gsm / 500gsm / 550gsm / 600gsm / 750gsm |
| Total Thickness | 0.32mm / 0.35mm / 0.4mm / 0.45mm / 0.5mm / 0.65mm |
| Roll Size | 2m width × 75m length / 2.1m width × 50m length |
| Finish Product Size | Custom cut sizes or sold by inventory roll |
| Color Options | Blue / Red / Yellow / Light blue / Grey (custom colours available) |
| Key Features | Waterproof, sunproof, cold crack resistance, anti-mildew, anti-static treatment, outstanding tearing strength for welding, best color fastness |
| Special Treatments | Flame retardant, anti-static, anti-cold, anti-mildew, 3P — confirm the grade required for your market |
| Service Life | 3–7 years under normal circumstances (source value — verify against project conditions) |
| Standards | ISO, CE (company-level certification) |
Application Suitability
| Application | Exposure & Requirement |
|---|---|
| Fish pond and aquaculture reservoir liner | Permanent water contact, soil chemistry, puncture risk from substrate, UV exposure at water line |
| Above ground pool metal frame liner | Hydrostatic pressure, frame abrasion at contact points, repeated seasonal assembly and teardown |
| Tent and awning fabric for outdoor structures | Wind load tension, UV degradation, rain ingress at seams, repeated folding for transport |
| Inflatable and membrane structure fabric | Internal air pressure stress, weld seam integrity, UV and weather exposure on curved surfaces |
| Truck awning and cargo cover | Road vibration, flex fatigue at tie-down points, abrasion from load movement, weather exposure |
When a Pond Liner Fails at the Fold Before the Fabric Ages Out
Liner failure almost always starts at the welded seam or the fold line, not in the field of the fabric.
PVC pond liner tarpaulin is only as reliable as its weakest join. When heat-welded seams are set without accounting for the specific coating thickness and polyester base fabric density, the bond can delaminate under hydrostatic pressure long before the surrounding material shows any sign of degradation [NEED_CITE: tensile and tear test methods for coated fabrics per ISO 1421]. Aquaculture operators and pool builders frequently discover this failure during the first full water fill — the fabric itself looks pristine, but water is already migrating through a seam that never achieved full adhesion. This is why GSM alone is an incomplete specification for pond liner applications.
Coating Adhesion and What It Means for Liner Integrity
The bond between the PVC coating and the high-strength polyester mesh base fabric determines whether a liner survives its first season or its fifth. Laminated technology and hot-melt coating technology both produce strong adhesion, but they behave differently at the weld line where two panels overlap. Hot-melt coating tends to penetrate deeper into the mesh structure, creating a mechanical lock that resists peeling forces during heat welding. For above ground pool liners that experience cyclic loading as water levels fluctuate, this adhesion strength at the join is the single most important material property after basic waterproofing. PVC coated tarpaulin for pond and pool use must be evaluated on weld peel strength, not just flat-sheet tensile figures.
Why Roll-to-Roll Colour Consistency Matters on Site
When you are lining a visible above ground pool or a commercial aquaculture facility, panels cut from different rolls will sit side by side in direct sunlight. Even minor shade variation between rolls in the same shipment becomes obvious once installed and backlit [NEED_CITE: colour fastness test standards for PVC coated textiles]. This is a production control issue, not a raw material issue — it comes down to pigment dosing accuracy at the coating head and consistent oven temperature across the production run. Our QA process locks the colour reference per production batch and documents it in the packing list so that every roll in your order matches the approved sample.
Reading the Specification Sheet Beyond GSM
The weight of a PVC coated tarpaulin in GSM tells you how much material is on the roll, but it does not tell you how that weight is distributed between the base fabric and the coating layers. A 550gsm fabric with a heavy coating and a light base mesh will have different tear propagation behaviour than a 550gsm fabric with a lighter coating and a denser polyester yarn structure. Total thickness — ranging here from 0.32mm to 0.65mm across the available grades — gives a second axis of comparison. For pond liner applications where puncture resistance from sharp substrate is a concern, a thicker overall construction with a robust base fabric will outperform a thinner material of identical GSM. The coating technology also matters: laminated construction produces a distinct coating-to-fabric interface that can be evaluated for peel strength, while hot-melt coating creates a more integrated structure. Surface finish affects cleanability — glossier surfaces shed algae and sediment more readily in aquaculture settings, while matte finishes reduce glare in visible pool installations.
The Hidden Cost of Specifying on Price Per Kilogram Alone
When procurement decisions are driven primarily by cost per kilogram, the supplier has an incentive to reduce coating weight while maintaining the quoted GSM through a heavier but lower-grade base fabric. The result is a material that passes the scale test but fails in the field — the coating is too thin to provide adequate waterproofing at the weld overlap, and the base fabric lacks the tenacity to resist tear propagation under load [NEED_CITE: relationship between coating weight and seam peel strength in PVC tarpaulins]. For pond and pool liners, this failure mode shows up as hairline cracking along fold lines during the first cold season, or as seam delamination when the liner is drained and refilled. Batch colour inconsistency across a single order forces costly panel replacement when installed panels must match visually. These are not rare edge cases — they represent the most common complaints from aquaculture and pool liner buyers who sourced on unit price without specifying verification protocols.
Why Coated Fabric Buyers Source From This Production Line
Three full production lines with 36 sets of professional equipment give this facility the capacity to hold roll-to-roll consistency across large pond liner orders without splitting production across different coating heads. The 10-person R&D team develops samples within days for custom colour, width and treatment requirements, so you can validate the material against your specific pool frame geometry or pond substrate before committing to a production run. Dedicated QA and QC at every production stage — from base fabric inspection through coating weight measurement to final roll winding — means the pre-shipment inspection record reflects actual production data, not sampled estimates. Nearly 30 years of focused experience in coated fabric has produced deep process control over the variables that matter most for liner applications: adhesion strength, colour consistency and weld integrity.
Documentation & Verification
- Material specification sheet stating GSM, base fabric type, coating method and colour reference per roll
- Pre-shipment inspection record with measured coating weight verified against the quotation
- Test report for UV and flame retardant treatments where applicable to the selected grade
- ISO and CE certificates confirming management system compliance
- Roll packing list with batch number and colour reference for traceability
- Certificate of origin and customs documentation for international shipment
Fabrication, Handling & Storage
- Heat weld at temperatures matched to the selected coating thickness — 0.32mm and 0.65mm grades require different dwell times for full adhesion
- Store rolls horizontally on pallets to prevent permanent creasing in the polyester mesh base fabric
- Allow rolls to acclimatise before unrolling in cold conditions to avoid cold crack damage to the PVC coating
- Use compatible PVC-based adhesives for field repairs on laminated construction panels
- Plan panel cuts from 2m or 2.1m roll widths to minimise weld seams in finished pond or pool liners
- Clean glossier finish surfaces with mild detergent to maintain appearance in visible pool installations
Requesting a Quotation That Matches Your Project
To receive an accurate specification and lead time, share your intended application — whether fish pond, above ground pool or membrane structure — along with the water depth or structural load the liner must withstand. Specify the roll width you need, the target GSM or thickness grade, and any colour or treatment requirements such as flame retardant certification for your market. Let us know whether you require full roll stock or custom cut panels, and whether a sample approval step is needed before production begins.
Frequently Asked Questions
Q: How do I verify the GSM on arrival matches what was quoted?
A: Each shipment includes a pre-shipment inspection record documenting the measured coating weight per roll. You can cross-check this against the material specification sheet and your original quotation. We also recommend spot-checking a sample from the received roll using a calibrated scale to confirm the GSM matches within agreed tolerance before fabrication begins.
Q: Can different rolls in the same order be guaranteed colour-consistent once installed side by side?
A: Colour reference is locked per production batch and documented in the packing list. All rolls in a single order are produced from the same pigment batch under controlled oven conditions to minimise shade variation. If your project requires panels from multiple production runs to sit adjacent, request a colour comparison panel before the second batch enters production.
Q: What test reports support UV and flame retardant treatment claims?
A: Where UV or flame retardant treatments are specified, test reports are supplied documenting the grade achieved and the test standard applied. The specific grade available depends on the treatment formulation selected for your order — confirm the certification level required by your local building code or aquaculture regulation before requesting a quotation.
Q: How are welded seams tested to ensure they outlast the liner fabric itself?
A: Welded seam samples are subjected to peel and tear testing at the production stage, verifying that the bond strength at the join meets or exceeds the base fabric strength. This testing uses the same coating thickness and weld parameters that will be used for your finished panels. Test data is available on request as part of the documentation package.
Q: What is the minimum order for a custom width, colour or printed branding?
A: Minimum order quantities vary depending on the custom specification — non-standard widths require a production line changeover, while custom colours require a minimum pigment batch volume. Share your required roll width, colour reference and annual volume, and we will confirm the applicable minimum and lead time for your specific configuration.
