GREENHOUSE SCREEN Russian patent published in 2022 - IPC A01G9/14 

FIELD: greenhouses.

SUBSTANCE: invention relates to greenhouses for growing plants. The screen for the greenhouse contains strips (11) of film material, which are connected together with a system of yarns of transverse threads and longitudinal threads (13a, 13b) through a knitting, warp knitting or weaving process to obtain a continuous product. The strips (11) comprise a polyester film having a transparency of at least 93% measured in accordance with ASTM-D 1003-6 (Method A). At the same time, said polyester film has at least one main layer B containing thermoplastic polyester and UV stabilizer, and said polyester film has first and second surfaces. Anti-fog coating is applied to at least one of the first and second surfaces of the polyester film. The latter is a dispersion composition and contains a hygroscopic porous material, a polymer-based cross-linking agent, an organofunctional silane adhesion promoter, and one or more surfactants. Said antifog coating has a thickness of at least 60 nm and at most 150 nm and a refractive index of less than 1.64 at a wavelength of 589 nm in the machine direction (MD) of the film. In this case, the specified refractive index is lower than the refractive index of the main layer B.

EFFECT: invention will improve the durability of the anti-fog film coating in combination with high transparency and long-term stability.

24 cl, 5 dwg, 4 tbl