Investigation of some factors affecting the quality of thermoset mouldings

Recent progress in the area of thermosetting materials, namely, the development of injection moulding compounds, has expanded their use and thus their production and processing. Unfortunately, several problems exist during the manufacture of phenolic based thermosetting compounds and also during the life of the saleable article. These problems begin at the moulding stage, where it is noticeable that the useful life of the mould is shortened due to the abrasive action of the compound, through to the utilization of the finished article, where after prolonged usage breakage may occur. The objectives of this research programme have been to further the understanding of the mechanism of mould wear and propose ideas on the morphology of phenol formaldehyde mouldings. [Continues.]