ABSTRACT
This chapter presents that was based on timber that was only partially planed. The key needs that lead to the developments outlined were: The possibility of obtaining glulam made from members of variable thickness with glue spreads comparable to those used for normally planed timber, A comparable production rate, Acceptable manufacturing costs, Acceptable raw materials inventories. The surface temperature of the timber during glue application was 18°C, while after mechanical mixing of the glue-mix ingredients and before introduction into the extruder head, the formulation had a temperature of 16°C. The adhesive produced positive results on partially planed timber. The bond on properly planed timber also appears to be improved by the use of such adhesives. The use of expanding resorcinolic adhesives appears to be a better and more efficient system for gap filling of glued joints, especially when the gaps are of a thickness and a size that cannot be filled effectively by traditional gap-filling adhesives.
