RKW Hyplast offers a wide range of co-extruded films (up to 7 layers) for various applications in agri- and horticulture. Thanks to the process of co-extrusion, it is possible to combine the optical, thermic, mechanical and chemical properties of different raw materials in the best possible way in one single film. This results in a film giving your crop the optimal protection against negative influences from outside and creating an ideal microclimate for your crop to grow.

Next to a number of elements that are important for every greenhouse film, like a high light transmission, a long lifetime and good mechanical properties, RKW Hyplast can influence a number of specific film properties. In this way, we are able to develop the perfect film for every climate and every culture.

The table below gives a brief overview of the most important Hyplast Greenhouse films and their properties. Under certain conditions, Hyplast NV can of course develop and produce customer-made films. For detailed information about our range of Greenhouse films, please contact our sales department.

 

ThermicityDiffusionAnti-
Fogging
UV-
blocking
Cooling effectAnti-DustMechanical strengthPesticide Resistance
Hyticlearnononononoyes++
Hyticlear Nickelnononononoyes+++
Hytithermicyesnonononoyes++
Hytithermic Nickelyesnonononoyes+++
Hytiluxyesnoyesnonono+++
Hytiroseyesyesyesyesnono+++
KoolLitePlusyesyesyesyesyesno+++
Hytitunnelnononononoyes++

The most important properties of our Greenhouse films are:

Thermicity
The addition of mineral fillers or co-polymers like EVA reduce longwave infra-red radiation (heat) leaving the greenhouse. Slower cooling under thermic films keeps heating costs down.

Diffusion
Light transmission is an important property of greenhouse film. It is however of equal importance to make a difference between direct and indirect or diffused light. Too much direct light can have a harmful influence on plant growth, especially in regions with intense sunlight. Addition of mineral fillers results in a broader and more equal light dispersion. This diffused light reduces the stress and has a positive influence on the plant growth.

Anti-fogging
Condensation drops are blocking a part of the (PAR) light (up to 15%) and can also damage the plants. By adding special additives, the condensation on the film will form a thin water layer that is drained off to the side of the greenhouse/tunnel. Result: more light in the greenhouse.

UV-blocking / Anti-Petal Blackening
Ultraviolet radiation doesn’t always contribute to plant growth, but can in some cases cause damage to the crop. By adding special additives that block the UV-light, this radiation cannot enter the greenhouse. Thanks to UV-blocking, the so-called ‘petal blackening’ of roses is avoided.

Cooling effect
Plants don’t need all frequencies of solar energy. Some radiation frequencies like the Near Infra-red (NIR) only provide heat. Especially in hot climates it can be very useful to block this irradiation heat as much as possible in order to avoid overheating and evaporation in the greenhouse. By using special interference pigments (Hyplast patent), Hyplast is able to present films that selectively reflect certain wavelengths: blocking irradiation heat as much as possible and transmitting the PAR-light. Thanks to this technology, it is often no longer necessary to ‘whiten’ the greenhouse or to use screens.

Anti-dust action
Extra smooth film avoids dust sticking too much to the film. Result: higher light transmission. A smooth film surface also facilitates cleaning.

Resistance against pesticides
Pesticides, especially sulphur and chlorine, containing ‘reacting agents’ can have a very negative influence on the lifetime of a film. The use of specific protective additives help to control these influences. Nevertheless, the use of pesticides in combination with PE films has to be avoided as much as possible, as pesticides will accelerate aging of the film when used in high concentrations.

‘Energy screen’ films are used as a screen in a greenhouse to reduce the energy consumption during the cold winter months.

These thin translucent anti-fogging films are positioned horizontally between the crop and the roof of the greenhouse. In this way, an ideal climate (high relative humidity) is created for the young growing plants in the substrate culture (e.g. paprika, cucumber, …). The energy screen is suspended in the greenhouse 3 to 6 weeks before the startup of a new culture. The light necessary for plant growth is transmitted, and the film prevents heat to escape. Thus the film helps to maintain the proper temperature inside the greenhouse.

The table below gives a brief overview of the most important Hyplast Energy screen films and their properties. Under certain conditions, Hyplast NV can of course develop and produce customer-made films. For detailed information about our range of Energy screen films, please contact our sales department.

Used as soil cover, our mulch films offer an excellent humidity and heatcontrol. In certain cases, heating ofthe soil leads to crop acceleration. Moreover mulch films avoid weed growth. Indeed, mulch films help to grow your crops the best they can.

The table below gives a brief overview of the most important RKW Hyplast Mulch films and their properties. Under certain conditions, RKW Hyplast can of course develop and produce customer-made films. For detailed information about our range of Mulch films, please contact our sales department.

Weed preventionLight reflectionHeating up of the soil
Hytimulch black/whiteyesyes-
Hytimulch blackyesno+
Hytimulch brownyesno+++
Hytimulch greenyesno++
Hytimulch transparentnono++++

The most important properties of our Mulch films are:

Mechanical strength
Mulch films are usually placed mechanically. Therefore it is of utmost importance that mulch films are strong enough. Thanks to the use of special raw materials and new developments, RKW Hyplast can guarantee a steady quality and strength.

Reduced evaporation
Mulch films help to control the moisture content of the soil. Under influence of temperature and wind, the soil might dehydrate too fast, which could have serious consequences for the crop. Mulch films retain the water in the soil and avoid a (too) fast dehydration. In this way, they help to create an optimal microclimate under the film. As mulch films cover the soil, they also keep the necessary nutrients in their place and avoid them being washed out of the soil.

Special properties
Next to the above mentioned general properties, mulch films can also have a number of very specific properties like: - anti-fog effect for transparent mulch films - different colours (white, black, black/white, green, brown, etc. - different thicknesses (from 18 µm to 100 µm) - bio-degradability. These specific properties depend on the type of culture, the location where the film is used, the desired lifetime, etc.

Lifetime
Depending on the application, mulch films have to last 1 to 3 seasons. The use of special additives, that for example protect the film from premature ageing under the influence of UV-light, enables us to guarantee the lifetime of mulch films for the necessary period (up to 3 seasons).

Bring forward the harvest and protection against frost.

Perforated films create a microclimate. Thanks to this, they protect the young plant from possible damage due to light frost. Besides, a higher temperature and humidity underneath the film results in better conditions for the crop to flourish.

Result: earlier harvest thanks to a better and faster crop growth.

The table below gives a brief overview of the most important Hyplast Perforated films and their properties. Under certain conditions, RKW Hyplast can of course develop and produce customer-made films. For detailed information about our range of Perforated films, please contact our sales department.

 

ThermicityAnti-FoggingMechanical strength
Perfonono+
Hytiperfonono+
Hytiperfo SSSLnono+++
Hytiperfo SSSL AFnoyes+++
Hytiperfo SSSL TH AFyesyes+++
Hytiperfo SSSL THyesno+++

The most important properties of our Perforated films are:

Mechanical strength
Perforated films are thin. Thanks to the use of special raw materials and new developments, RKW Hyplast can guarantee a steady quality and strength. Depending on the application, perforated films have a thickness of 20 µm to 50 µm and a width up to 1600 cm.

Perforation pattern
The number of perforations/m² varies from 125 to 800 holes/m². The diameter of the holes is 6 mm or 10 mm.

Special properties
Next to the above mentioned general properties, perforated films can also have a number of very specific properties like: - anti-fog effect - thermic properties

The most popular method of soil disinfection makes use of film in combination with a fumigant. The film covers the soil and the disinfectant is released underneath the film or in the soil. Many of these disinfectants attack the ozon layer. Hence the tendency to phase them out and to replace them by less noxious alternatives.

Next to disinfection films based on LDPE and/or LLDPE, RKW Hyplast developed a number of special films with a very high barrier against disinfection agents. Result: an effective soil disinfection with less disinfectants and also much more environmentally friendly thanks to a lower emission of detrimental substances in the air.

The table below gives a brief overview of the most important RKW Hyplast Disinfection films and their properties. Under certain conditions, RKW Hyplast can of course develop and produce customer-made films. For detailed information about our range of Disinfection films, please contact our sales department.

Methyl Bromide Barrier
Fumigation transparent+
Hytimethyl++
Hytibarrier+++++

The most important properties of our Disinfection films are:

Mechanical strength
Disinfection films are very thin (only up to 20 µm thick), but they must have very good mechanical properties. Especially narrow widths (up to 400 cm flat) need to have a high degree of elasticity and excellent tear resistance as they are typically machine laid. Only first grade raw materials are good enough to always guarantee these properties.

Barrier properties
Disinfection films avoid that too many disinfectants are released in the air, having detrimental consequences for man and environment. The limited availability of certain disinfectants and environmental and health issues urge more and more the use of special barrier films based on polyamide and/or EVOH. More and more, these films have to meet severe national and international standards.