BigPatents India

A method of manufacturing Natural Fiber and Thermoset composite sheet/board comprising the steps of :- i) a resin of phenolic substances prepared by reacting phenol, monochloro phenol with formaldehyde in the molar ratio 0.9 to 1.5:0.1 to 0.5:0.8 to 1.8 in presence of acid catalyst or phenol, monochloro phenol and formaldehyde in the molar ratio 0.9 to 1.5:0.1 to 0.5:1.4 to 1.8 in presence of alkaline catalyst. ii) the said resin is dissolved in methanol and hardner; iii) the said resin solution mixture further admixed with filler and other additives to form a slurry; iv) the jute cloth impregnated in the said slurry of steps (iii); v) the said impregnated jute cloth dried in oven at temperature 100ÛWRÛ& vi) the said impregnated and dried jute cloth cut into required size; vii )the said impregnated dried cut pieces of jute cloth multilayered accordingly to required thickness and pressed in the hydraulic press at a pressure of 1 to 3 tons per square inches for a period of 5 to 30 minutes, at a temperature of 100Û&WRÛ& viii) the said pressed multilayered jute cloth is trimmed to required size to form the natural Fiber Thermoset composite sheet/boards. Drawing: 01 Sheet. Total Pages: 14