The manufacture of roofing panels from sisal fibre reinforced composites

Sisal fibre is a vegetable fibre having a specific strength and stiffness that compare well with those of glass fibre. The fibre surface can be modified by chemical treatment to create an interface that is fairly compatible with most thermosetting resin matrices. Most synthetic resins are, however, more expensive than the sisal fibre, making these composites less attractive for low -technology applications. Cashew nut shell liquid (CNSL) has...