Synthetic resins and their properties in respect of development of jute based composite boards

Abstract

Synthetic resins play an important role for preparation and sustenance of composite industry. Preparation of synthetic resins in standard protocol is readily available in literature. However, the standardization and stability of both urea formaldehyde and phenol formaldehyde resins has the paramount importance to develop suitable composite board. An attempt therefore made to synthesis these resins through a rational approach. The developed resins were subjected to preparation of medium density particle board and it has been revealed that higher resin viscosity causes ball formation with fibrous mass at the time of blending; however resin viscosity of 250 – 300(cP) is found suitable for making fibreboard. 0.75 board density can meet the BIS specification for fiberboards (IS 12406). In this experiment the fibreboards need to have a density of 0.74 g/cc and a resin content of about 12% to produce boards conforming to BIS specification. It is also observed that the dry process generated fibres have a better l/b ratio compared to wet-process generated fibres.