METHOD AND DEVICE FOR FORMING,BY SPRAYING, A POLYURETHANE LAYER ON A SURFACE

摘要

Method and device for forming a gellified polyrethane layer on a surface, notably of a mould, by spraying a liquid reaction mixture comprising polyol and isocyanates and which has a viscosity between 20 and 2000 centipoises, wherein said mixture is sprayed in the form of a film (7 min ) of liquid and/or of raindrops (8 min ) of which the main part has a mean diameter (Medium Volume Diameter; "M.V.D.") which, according to the standards ASTM E 779-18, is larger than 100 microns and preferably larger than 500 microns.