- Model LP-Keder - Greenhouse Films

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Significant energy savings: Thanks to its distinctive insulation properties (thermal conductivity value of 3.3 W/sq. m.K), Polydress LP-Keder offers a high level of energy efficiency. Its construction principle (air bubbles, keder, profile) prevents any leaks or thermal bridges, so that up to 95% of the heat radiation can be retained. This allows you to save money.

High transparency
Polydress LP-Keder guarantees the uniform illumination of the entire horticultural area. At the same time, the air cushion bubbles (1,000 bubbles per sq. m.) ensure a diffuse illumination inside. This prevents the formation of shade and burning glass effects.

High resilience
Another plus point of the film is its high resilience. Unlike some other films, Polydress LP-Keder can withstand the standardized drop weight test without any consequences. Due to its high quality, Polydress LP-Keder can bear high surface loads by sectioning off the roof surface.

Weatherproof greenhouse cover
Polydress LP-Keder represents the highest degree of security for a greenhouse cover. Experience has shown that the horticultural area is well-protected, even in the event of hail, snow or high winds. Even “Lothar”, the storm of the century in 1999, had no adverse effects on the film.

Long-term UV stability
RKW guarantees the five-year UV stability of Polydress LP-Keder at 100 Kly/y. Even under the most severe climatic conditions, no changes in color or clouding will occur, and the film will not weaken in any way.

Easy installation
Polydress LP-Keder can be easily cut with a knife or scissors. The low weight of the strips of keder allows for simple installation and simple replacement of old or defective sections.

Trouble-free recycling
Polydress LP-Keder is a polyethylene film that can be completely recycled in an environmentally-friendly manner or thermally reused in secure fashion.

  • Total thickness: 8.5mm (± 1mm) / 0.34” (± 0.04')
  • Roll width: 1.97m & 1.985m / 77.56' and 78.15'
  • Roll length: 100m / 328 ft
  • Weight per square foot: approx. 410g/m² (± 10 %)
  • approx. 1.31 oz/ft2 (± 10 %)
  • Roll weight: approx. 81kg / 178.5 lbs
  • UV-stabilization/ durability: 1.8∙106 BTU/ft2 (20920 MJ/m2, equivalent to 5 years in central Europe at an average annual solar radiation of 4184 MJ/m2 or 100 kly/year)
  • Insulation/R-Value
  • (ASTM C177-10): 1.7 (ft2∙°F∙h)/BTU
  • Heat conductivity: 0.04 BTU/(ft∙h∙°F)
  • Transparency
  • (ASTM E424-71):
    • approx. 83 % (light)
    • approx. 30 % (infrared)
  • Additional features: Anti-fog/anti-condensation additive

  • Total thickness: 8.5mm (±1mm) / 0.34” (± 0.04')
  • Roll width: 1.97m & 1.985m / 77.56' and 78.15'
  • Roll length: 100m / 328 ft
  • Weight per square foot:
  • approx. 410g/m² (± 10 %)
  • approx. 1.31 oz/ft2 (± 10 %)
  • Roll weight: approx. 81 kg / 178.5 lbs
  • UV-stabilization/ durability:
  • 1.8∙106 BTU/ft2 (20920 MJ/m2, equivalent to 5 years in central Europe at an average annual solar radiation of 4184 MJ/m2 or 100 kly/year)

The air bubble greenhouse film Polydress LP-Keder is a lightweight, tear-resistant material that you can cut easily with a knife and scissors.

It simplifies your greenhouse construction and reduces the building time, allowing an installation in record time. Uniform illumination and a favorable microclimate promote plant growth.

The air bubble greenhouse film Polydress LP-Keder
The air bubble greenhouse film is very easy to assemble due to the special features of the keder section and keder channel:

  • Unwind Polydress LP-Keder from the film roll.
  • Feed the greenhouse film in strips into the unique greenhouse truss profiles.
  • Pull on the pull rope until the desired end point is attained.
  • Finally, simply cut the foil with a knife or scissors.

In case of damage, you can easily replace individual strips. This keeps costs down and promotes sustainability.

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