Materials
Generally pvc coated fabrics are used manufactured with high frequency welding (HFW) to create air-supported, tent and tensile structures.
The technical fabrics in pvc are created using a liquid compound composed of plasticizers and polymers called "plastisol" which is then spread and sinterised on a textile support.
The addition of flame retardants and agents against mould, UV rays, anti-static compounds, etc. to the formula for this product, originally considered inferior to elastomers, have given it an edge in a wide range of technical sectors present on the market thanks to innovative developments and constant technological processes.
Therefore technical construction needs and economic satisfaction have found their perfect combination in pvc textiles offering flexibility to the product and its multiple applications at the same time.
Membrane types
| EXTERNAL FINISH | ACRYLIC | WELDABLE PVDF | PVDF 100% | TEDLAR FILM |
| Recommended uses | Temporary structures | Fixed structures | Important permanent structures | Important permanent structures |
| SUPPORT CLOTH | Polyester | Polyester | Polyester | Polyester |
| COATING TYPE | PVC | PVC | PVC | PVC |
| LIFESPAN (years) | 10 | 12 | 15 | 15 |
| RESISTANCE TO AGING | satisfactory | good | very good | very good |
| RESISTANCE TO DIRT | satisfactory | good | very good | excellent |
| TRANSLUCENCE | excellent | excellent | excellent | very good |
| FIRE RESISTANCE | excellent | excellent | excellent | very good |
| RESISTANCE TO BENDING | very good | very good | very good | satisfactory |
| MANUFACTURING TYPE | HFW (*) | HFW (*) | HFW (**) | HFW (**) |
| MANUFACTURING COSTS | Very low | Low | Medium | Medium high |
(**) after local removal of the film in PVDF/TEDLAR at the joints
PM Engineering