Air-Tight PVC Coated Canvas Fabric for Bag Material Production
LonaTarp manufactures 500gsm Air-Tight PVC coated canvas fabric for roll material orders that need a flexible coated structure, controlled air-barrier direction, and stable surface quality before further fabrication. For pvc coated canvas fabric for bags, the material needs to balance coating strength, folding behavior, sealing performance, and roll handling instead of only focusing on weight.
Air-tight performance usually depends on coating continuity, laminated or bonded barrier structure, pinhole control, and coating adhesion. If the fabric will be converted into bags, the material should be reviewed for how it behaves around folded edges, welded areas, sewn points, and repeated handling zones.
Bag Material Requires More Than Surface Waterproofing
PVC coated canvas fabric can provide a waterproof surface direction, but air-tight bag material needs stricter control. Small pinholes, weak coating adhesion, uneven barrier layers, or damage during folding may affect the final sealed performance after conversion.
For this reason, LonaTarp confirms the PVC coating structure, base fabric density, flexibility, roll width, surface finish, and testing requirement before sample production. If the order requires pressure-holding, air leakage, or air permeability testing, the test condition should be agreed before bulk production.
Bag Fabrication Review Matrix
| Fabrication Area | Material Risk to Control | LonaTarp Review Direction |
|---|---|---|
| Folded Edges | Coating stress, cracking, or whitening after folding | Check flexibility, coating adhesion, and fold resistance by sample |
| Welded Zones | Air leakage caused by uneven coating or poor heat response | Confirm welding direction, coating balance, and barrier continuity |
| Sewn Areas | Needle holes may affect air-tight performance | Confirm whether sewing is acceptable or welding is preferred |
| Bag Body Panels | Surface marks, pinholes, or thickness variation | Review coating uniformity, finished weight, and surface inspection standard |
| Roll Handling | Pressure marks or edge damage before fabrication | Confirm roll core, wrapping method, edge protection, and packing |
| Functional Add-ons | Extra functions may affect coating formula | Confirm UV, FR, cold resistance, or anti-static needs before sampling |
500gsm Structure for Flexible Air-Barrier Roll Supply
The 500gsm direction gives this PVC coated canvas fabric a practical balance between coated body and handling flexibility. It is not positioned as an extremely heavy tarpaulin material; it is better suited for orders that require manageable roll weight, stable coating coverage, and controlled air-tight direction for later bag production.
For bag material orders, sample review should include hand feel, folding behavior, coating adhesion, surface condition, air-barrier direction, and how the material responds to the planned joining method. A full-width sample can be useful when the final production requires consistent roll behavior across wider panels.
Custom Roll Material Supply from LonaTarp
LonaTarp supplies 500gsm Air-Tight PVC coated canvas fabric as custom roll material for distributors, fabricators, wholesalers, and industrial material manufacturers. We support custom width, roll length, color, surface finish, PVC coating formula, laminated barrier direction, and export packing according to confirmed specifications.
Roll material MOQ is 5,000 sqm for custom production. Normal production lead time is about 15 days after specification approval, depending on coating formula, air-tight requirement, color, surface finish, order quantity, roll size, and packing method. A4 samples can be arranged for initial review before bulk production.
