Utilisation of gummy mass-a by-product of Lac industry

摘要

Attempt has beenmade to find utilization of gummy mass,a by-product of lac-based industry.High thermal resistant baking type insulating varnishes have been developed based on gummy mass and synthetic resins.These varishes possess all t basic requirmeents as per IS:10026-1982.The performance of one of the varnishes was found to be satisfactory by a local consumer when applied on the coils of a 220 kW 6.6 kV electric motor.Gummy mass was further attempted for use as an extender in polyester resin based sheet moulding compound (SMC)for preparing fibre-glass reinforced (FRP)sheets.The FRP sheets thus prepared by hand ly-up technique and curing in the cold,possessed good mechanical properties and moderate resistnace towards various chemicals.Gumy mass,being cheaper compared to polyester resin,appears to possess potential for utilization in the above fields.