The types of additives used are:
- UV additives (Hals): Highly effective light stabilizers for a broad spectrum of polymers. The Hals does not absorb ultraviolet light, but acts as a free radical scavenger inhibiting polymer degradation. The Hals also contribute to improve the thermal stability of polymers in the long term. These give greater transparency in greenhouse plastics, which allows a greater photosynthetic radiation (PAR).
- UV Additives (Nickel Quenchers): Stabilizer that acts as an energy transfer agent. These additives give the plastic a yellow-green appearance.
- Diffuser additives: They can increase diffusion up to 70%. The levels of global light transmission are not significantly affected, but the increasement in diffusion makes it possible to have more usable light in some plants, which is translated to a higher performance.
- UV absorber additives: These kind of additives absorb harmful UV light and improve the polymer's resistance to degradation when they are exposed to external conditions.
- Thermal additives: these are known as mineral charges, which improve the temperature inside the greenhouse by retaining the long infrared radiation. This allows to achieve a good crop development by keeping the temperatures in the greenhouse higher during the night. Likewise, it prevents frost damage and helps reduce night heating costs.
All our covers can be supplied with anti-condensation properties. If they are installed properly they cause the condensation of the water without allowing the formation of drops. This improves the transmission of light and reduces the risk of droplets falling on the plants.
The most important properties of plastic covers for agriculture are:
Traction: The traction to the breaking point is defined as the force necessary to break a film. Avoid plastic breakage during installation and in events of inclement weather, such as strong wind in the case of roofs and tunnels. The deformation in tensile to the break or elongation is the elongation of the film until breaking it. It allows adequate tension of the cover at the time of placement. The tensile deformation at the point of rupture is also the criterion that is followed to determine the degradation of a plastic film, considering that the degradation has occurred when the value of the elongation has decreased by 50%.
Creep: Creep is the evolution in time of the deformation of a test tube subjected to a constant effort. Plastic films are subject to this type of effort while they are installed.
Dart impact: This test measures the energy needed to break a film film by the impact of a dart. This energy is expressed as the mass of the dart which, when falling from a certain height, causes the breakage of 50% of the tested plastics.
Width: from 0.50 to 3.40 meters in sheet and up to 6.80 meters in single-layer; plastic film wrapped on 76 mm inner diameter cardboard tube, and each roll is packed with polyethylene film. In addition, labeling is presented with all the necessary data of its manufacture
Thickness: 200 μ / 800 Galgas
Cut to size
Delivery in 3-4 days at destination