Junius Andre F. Balista, Patrick Joseph Clement T. Bellora, Gerard S. Cabunducan, Paolo Vanni M. Venegas (March 2000)
Philippine Science High School Western Visayas Campus – Department of Science and Technology (DOST-PSHS WVC), Brgy. Bito-on, Jaro, Iloilo City 5000, Philippines
ABSTRACT
The study was conducted to determine the feasibility of producing coconut shell – wood resin composite as insulating substrate of circuit board. These insulating substrate were prepared in three different mixtures, i.e., (30%-70%), (40%-60%) and (50%-50%) coconut shell and wood resin. These mixtures were further mixed with water with constant ratio by weight of 70% coconut shell-wood resin mixture to 30% water. The products were tested on water resistance, etchant resistance, insulation resistance, and flammability.
Result showed that insulating substrate from coconut shell-wood resin composite was feasible. The products resisted water infiltration of mean amounts ranging from 86.64% to 90.70%. The products resisted etchant infiltration of mean amounts ranging from 81.88% to 91.35%. All of the products had high electrical resistance as reflected in the infinity readings from the ohmmeter. All of the products were not flammable.
There was a significant difference in the water resistance, etchant resistance and flammability of the insulating substrates.