Sandwich pultrusion

It is reported that sandwich panels are being produced in the USA by pultrusion. In this process a plywood core is completely encased in a 3 mm thick glass polyester skin, resin penetrating the plywood during production to give increased bond strength and moisture resistance. 

Ben, G. and Shoji, A. (2005), Pultrusion techniques and evaluations of sandwich beam using phenohc foam composite , Ariva/iceri Composite Materials, 14, 277—288. 

Liang, R., Mutnuri, B. and Ganga Rao, H. (2005), Pultrusion and mechanical characterization of GFRP composite sandwich panels , Society of Plastics Engineers Annual Technical Conference 2005, Boston, USA. 

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