Greenhouse screen
AssigneeAB Ludvig Svensson
InventorsPer Holgerson, Daniel Asplund
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Abstract
A greenhouse screen comprising strips of film material that are interconnected by a yarn system of transverse threads and longitudinal threads by means of knitting, warp-knitting or weaving process to form a continuous product is disclosed. At least some of the strips comprise a film material in the form of a single- or multilayer polyester film wherein the film contains at least 1.0 wt.-% SiO2 and a maximum of 2.5 wt.-% SiO2, and has a spreading factor of at least 2 and not more than 8. The greenhouse screen as disclosed herein has a reduced flammability and light scattering properties particularly suited for greenhouse applications.
Claims20
A greenhouse screen comprising strips of film material that are interconnected by a yarn system of transverse threads and longitudinal threads by means of knitting, warp-knitting or weaving process to form a continuous product, wherein at least some of the strips comprise a film in the form of a single- or multilayer polyester film wherein said film contains at least 1.0 wt. -% SiO2-particles, and a maximum of 2.5 wt. -% SiO2-particles, said SiO2-particles having a particle size d50 of 5-7 μm;
- and the film has a spreading factor (transparency measured according to ASTM D-1003-61, Method A/transparency measured by the Clarityport) of at least 2 and not more than 8 and the film has a clarity of 18-40%.
Dependencies are inferred from the claim text.