Glass Fibre Reinforcements form the foundation of a composites industry with a global annual production of greater than 10 million tons of high performance, light-weight materials. Possibly the most critical component involved in the manufacture of glass fibres and their composites is the fibre surface coating or size. Yet because of the intense level of industrial secrecy around size formulations there are very few people in the vast chain of composite materials suppliers, processors and end users who have more than a superficial understanding of these coatings. Many questions are raised about glass fibre size by this large and growing composite community. But the most frequently asked is what is actually in the size on this glass fibre product82328232 There is only one source of openly available information on commercial size formulations and that is the patents of the glass fibre manufacturers. This book contains analysis of more than 500 examples of patented size formulations many