A NEW PLASTIC MATERIAL insensitivity to ultraviolet
Dutch company LUDVIG SVENSSON INTERNATIONAL BV was created a new type of plastic coating that is resistant to UV radiation. Damage to any type of support material, it will extend its service life under direct sunlight, be it film for greenhouses or awnings and blinds, and other materials that are prone to fading.
To extend the life of such films a known method of application of light stabilizer in the form of hindered amines (HALS-stabilizers). These are very good stabilizers for thin films to be used for a long time.
But the hindered amines are highly reactive and react rapidly with the resulting decomposition products, and moreover, they are alkaline. For this reason, they are easy to react with foreign substances which come into contact with the film and, in particular, acidic substances such as sulfur-based compounds, chlorine, bromine. And because some greenhouses such chemicals are widely used to protect plants from various diseases and insects, when sterically hindered amines react with these chemicals, the effectiveness of amine disappears and stability of the film to ultraviolet radiation is disturbed.
Some manufacturers of film for greenhouses limited warranty period produced films when these films are prolonged exposure to substances such as insecticides, fungicides, etc., and specifically substances containing bromine, chlorine, fluorine, iodine, sulfur, petroleum and wood preservatives containing copper.
Dutch company LUDVIG SVENSSON INTERNATIONAL BV was obtained material useful as a plastic film or a coating applied to a different carrier material, for the most part in the blind greenhouses in films for greenhouses, and as a material for covering up plants grown in the open field. However, this material may be used in other products, for example awnings and Venetian blinds, since these products can also be exposed to the medium containing the acid.
The new material possesses stable and UV exposed to chemicals that are part of a greenhouse environment (or the impact it has an extremely small extent), and in some cases has a fire resistance.
New properties of the material obtained by the fact that it is fully or partially contains a crosslinked polyolefin-silane-copolymer. The structure of the silane copolymer comprises polyolefin groups with a chain during polymerization, unlike the grafted polymer, wherein the polyolefin chain is opened, for example by peroxide then added silane groups and crosslinking is performed.
Polyolefine includes low-density polyethylene or copolymers thereof, such as ethylene vinyl acetate copolymer, or ethylene butyl acrylate. Increased stability of the material to UV light, which has been achieved is surprising property because the material is almost an ordinary polyolefin copolymer with one difference that the molecules are crosslinked to each other, whereby the properties such as crystallinity are almost unchanged.
Foil or coating based on a new material may comprise additives (various pigments), which make the material transparent to some wavelengths of sunlight and fogging agents against such as glycerol stearate or glycerol ester, or other substances which are added in order to avoid condensation and dripping.
The required fire resistance material provided by adding a fireproof agent in a plastic film or a strip thereof, and the agent may comprise a compound containing halogen or phosphorus.
Contact information:
Svensson Holland BV, Ludvig
Marconiweg 2, 3225 LV Hellevoetsluis, Fax: 0181-312058
