Polytunnels.com stock Visqueen films, the Industry Standard polythene tunnel cladding films from BPI Agri, although there are many makes of polythene on the market. We only use BPI Agri Visqueen films as they have been developed and tested for years before being released on to the market.
All the Visqueen range of horticultural films are manufactured using co-extrusion technology to bond together separate layers of polyethylene to produce a much tougher film and to control surface properties and radiation transmission.
CLEAR UVI/EVA
A clear film which is resilient and easy to install. An economical choice for applications where there is little to be saved on heat inputs and where condensation is not a problem.
POLITHERM AF
Has thermic properties to improve heat retention and additives to control the condensation of water on the film. Temperatures will be higher and savings can be made on overnight heating. If properly installed, water will condense uniformly on the film rather than as droplets. This improves light transmission and reduces the risk of water falling on plants. Best for crops which respond well to high direct light levels and warm temperatures.
Films Comparison : Typical Properties
|
|
Light Transmission |
Light Diffusion |
Thermic
Effect |
Thickness
Microns |
Yield
Strength |
Fold Impact |
|
Clear UVI/EVA |
90% |
20% |
55% |
180 |
8 MPa |
>550g |
|
Politherm AF |
90% |
22% |
82% |
180 |
7.5 MPa |
>550g |
| 
