The hand lay-up technique is extensively used for natural fibre-thermosetting polymer composites for simple processing procedures. In this process, short fibres, unidirec­tional and woven fabrics can be fabricated in resin. The resins are laid on the fabric by using a roller. Sreekala et al. (2002) have prepared the short random oil palm/glass hybrid fibre-PF resin composites by very simple hand lay-up along with compres­sion moulding methods.

10.3.2.2 Vacuum-Assisted Resin Infusion Moulding

This method is used for making multilayer laminated composite. Unidirectional, nonwoven or woven mats are sized according to the shape of the mould chamber used in this process. The mould is set in between the resin container and pump. The resin and hardener are infused slowly for wetting mats by vacuum pump. Thereafter, curing is continued for a long time at ordinary temperature (Yuhazri et al. 2010).