Polyethylene (poly) film was first used in the early part of the 1960s to cover the wood frame of a greenhouse. Today, it is still used for this purpose, but there have been more than a few innovations and improvements made. Today, the poly film is manufactured as a type of coextrusion, consisting of three layers, each with different additives and polymers. Each of these layers contributes to the overall quality of the film, along with how well it performs.
Learning more about the poly film and how it is used today is possible on the company website; however, knowing how to choose the right poly film is also important. Keep reading to learn more about making the right decision regarding the poly film that is ultimately purchased.
Life of the Film
According to realtimecampaign.com, the lifespan of polyethylene film will be limited because of the degradation process, which is induced by heat and sunlight. For example, copolymer poly is only good for use a single season. For those who have overwintering structures, high tunnels, or seasonal greenhouses, this is a smart option. It’s best to avoid using a construction-grade material, as this has much less strength.
Poly that is greenhouse grade usually comes with a four-year warranty, but it may cost twice as much as the co-poly. It includes an ultraviolet stabilizer that will help to reduce cases of degradation. If more strength is required, such as quality plastic for higher wind locations, then choosing a nylon or woven poly reinforced style of material from Pro-Tect Plastics is a good idea.
The one-year, co-poly film can be found in three, four, and six-millimeter thicknesses. The three or the four-millimeter film is common for use in overwintering houses, narrowing tunnels, and more. In most cases, greenhouse grad material will only be available in six-millimeter thicknesses. This option is considered for multiyear applications.
While there is a lot of information provided by reports like the Global Greenhouse Film Market Analysis, most people just want the facts and a very short, basic overview of them. When it comes to choosing the right film, it is important to consider the anti-condensate (a.k.a. anti-drip) which is a wetting agent that helps to reduce the present surface tension to continue moving, instead of forming droplets. It is possible to spray the film or to incorporate it into the middle layer. Usually, this will last for several weeks.
The condensation drops are going to help reduce the transmission of light and may leave to disease issues if it begins to drop onto the plants that are inside. Sometimes, an anti-fogging additive can be used to help prevent any late afternoon or early morning fog formation in the plant growing area.
Understanding how to choose the right poly for business or purpose can be challenging. However, with the information here, it is clear to see that finding the right option is essential. Keep this information in mind to do just that.