METHOD OF MANUFACTURING HEAT INSULATION MATERIAL Russian patent published in 1994 - IPC

FIELD: building materials production. SUBSTANCE: fibrous filler is mixed with sprayed binder at ratio 1: 1.1-1.2. The process is carried out in high-speed mixer. Then impregnated mass is passed through loosening-combing device. The process is followed by formation of fibrous carpet. Disperse-fibrous wastes of fulling-felt production (powdered fraction content in them being up to 35-42 mass % ) may be used as fibrous filler. EFFECT: decreases heat conductivity and average density of desired product, increases its hydrophobia; decreases initial humidity of forming mass and decreases duration of its heat treatment. 2 cl, 1 tbl