Section 6 Bonding and Fastening

602. Bonding

1. In case that the surface to be bonded is either of gel coat layer or air cure type resins(paraffin containing type), sanding of the surface is to be carried out by removing at least 0.4 mm or more

of the layer.

2. The first layer of fibreglass reinforcements on the surface to be bonded are not to be of roving cloth but to be of chopped mat. The peripherals of bonded area of partial laminating such as the

laminating for increased thickness or the secondary bond are to be so finished as to form smooth tapered ends as shown in Fig 5.1 and Fig 5.2 of the Rules.

3. In case of matting-in connections, the number of matting-in layers is to be determined correspond- ing to the clearance between FRP laminates, and chopped mat impregnated with slightly larger amount of resins(glass content : 25 % or thereabout) is to be inserted in between and to be clamp- ed by a pressure ranging from 300 to 350 kgÕcmĪ.