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Guidelines for the use of greenhouse films NPF "Shar"
IMPORTANT!!!
When attaching the film, follow the markings on the film, if any. If installed incorrectly, there will be no hydrophilic effect. BE CAREFUL!
Film life is the length of time that the film retains its durability by resisting the sun's UV radiation.
Film strength is considered lost when the relative elongation of the film after use is reduced by more than 50% compared to the relative stretching of the film at manufacture, as verified by laboratory testing.
The service life of agro-industrial films for greenhouses and greenhouses depends on the conditions of production and the conditions of exploitation.
The following recommendations should be followed to extend service life:
1. Greenhouse film storage
1.1. The films should be stored in their original packaging, in a cool, dry place away from heaters and direct sunlight
1.2. Stack the rolls horizontally on a flat surface
1.3. Film storage temperature -60°C to +30°С
1.4. You can't drag rolls on the ground
2. Preparing the greenhouse for the film
2.1. If the greenhouse frame is made of metal, all contact points with the film coating should be smooth and painted with opaque white, WATER-based paint. Oil-based paints can react chemically with the film and accelerate the process of film degradation.
2.2. If the greenhouse frame is made of wood, the surfaces must also be smooth with no sharp edges or burrs. The frame must be painted with white, WATER-based paint. Paints and oil-based protective impregnations react chemically with the film and destroy it. The resin in softwoods also reduces the life of the film, so well-dried wood should be used for the greenhouse frame.
2.3. Do not allow the film to come into contact with PVC parts. If the film is installed on a PVC pipe frame, insulating material (e.g., strips of white cloth or film) must be placed between the film and the frame.
3. Installing the film on the greenhouse
3.1. Before installation, when you have removed the packaging from the bale, inspect the bale to make sure there is no damage during transport, especially pay attention to the ends of the bale. If damage is found, do not install the film on the greenhouse, take pictures of the damage and notify the company where you purchased the film or us.
3.2. The film coating should be laid on the greenhouse at an air temperature of 15 - 22 ° C in windless weather.
3.3. Depending on the climatic conditions in your region and the design of the greenhouse, attach the film to the frame at such a pitch so that the film does not "flap" when the wind blows. If necessary, use additional cords (belts) to prevent the film from flapping when the wind blows.
3.4. Do not use fasteners that show signs of rust.
3.5. Fasten the edge of the film to one side of the greenhouse (or the ground) and then unroll the roll without opening the sleeve
3.6. When the roll is unrolled, cut the sleeve along its entire length and unroll the film.
3.7. Fasten the film to the greenhouse.
3.8. IMPORTANT: When attaching the film, follow the markings on the film, if any. If installed incorrectly, there will be no hydrophilic effect. BE CAREFUL!
3.9. If you unfold the film on the ground, choose a clean, dry place.
3.10. Do not stretch the film over the edge by securing the bale. With this method, any sharp object on the greenhouse or the ground will cause damage to the film along the entire length of the roll.
3.11. Do not unfold the sleeve at the same time as unrolling the roll. This can cause a lot of wrinkles, which can be challenging to remove.
3.12. Do not allow excessive tension/sagging of the greenhouse cover during installation. Excessive film tension can reduce film elasticity and cause the film to tear in the winter when the film shrinks due to low temperatures. Sagging on the frame will cause the film to flap in the wind and accumulate large amounts of rainwater or snow, leading to premature failure of the film.
3.13. Save a 50×50 cm sample from each batch of the film (the batch is indicated on the label) along with the label.
3.14. When using film on two-layer greenhouses, it is necessary to ensure equal air pressure between film layers.
4. Operation of the film for greenhouse
4.1. The use of pesticides drastically shortens the life of the film, so you should avoid getting any crop protection products on the film. The greenhouse should be ventilated after pesticide application.
4.2. Regularly check the frame's condition and promptly renew the coating of white water-based paint where the frame is in contact with the film.
4.3. Retighten the film as necessary. The presence of water pockets indicates insufficient film tension or too much distance between the film mounts on the frame.
4.4. Tears or punctures in the film must be repaired immediately with special polyethylene-based repair tapes. Avoid using PVC tape for repairs.
5. Warranties and Obligations
5.1. If you have any questions about the installation or use of our films, please contact our representatives in your area or us.
5.2. To file a claim for premature film degradation, you must provide us with a sample of the degraded film and a sample of unused film of the same batch, along with a label for testing. Also, provide proof of purchase of the film from our dealers or us. Report the date of installation and the date the film was destroyed. Provide photographs of the greenhouse structure and the location of the film breakdown.
5.3. Suppose premature decomposition of the film due to the manufacturer's fault is confirmed. In that case, the decomposed film may be replaced with a new film on the condition that the decomposed film is returned.
5.4. Attention: the warranty covers only the preservation of the strength of the film. We make no guarantees regarding the duration or effectiveness of additional features such as hydrophilicity or anti-fog effect. Their mechanism of action is complex and depends on many parameters beyond our control (climatic conditions, type of greenhouse, etc.).
