Foamed polystyrene plate and a method of manufacturing the plates from foamed polystyrene

摘要

A method for manufacturing of foamed polystyrene boards, whereby raw polystyrene grains are preliminarily expanded in an expander, and then seasoned, after which the seasoned grains are input to a mould, where under increased temperature and pressure, a block is formed, wherein the block is cut into boards of a desired shape and size, characterized in that the cut boards are sprayed with a bactericidal colloid consisting of 1% by weight of silver nanoparticles having a diameter of 50 nm in polymer shell, 93% to 97% of alcohol with average boiling point 65°C to 90°C, 0.1 % to 1% of surfacants, 0.2% to 2% of wetting agents, 0.5% to 1,5% of silanes, 0.2% to 1.5% of quelanting agents, 0.5% to 1.5% of substances with boiling point below 40°C and 0.1% to 0.5% of substances reducing viscosity of the whole colloid to a value below 1,0 cP, wherein the colloid is sprayed in the amount of 15 to 35 ml/m 2 , after which the board is dried until evaporation of the colloid solvent.