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1 GLUE STRENGTH��careful metering and thorough mixing will assure the epoxy mixture cures to full strength. 2 SURFACE PREPARATION��for the best adhesion and load transfer the surface must be properly prepared. 3 JOINT AREA��the bonding area, or adhesive area, of the joint must be adequate for the load on the joint. Increased overlap, scarf joints, fillets and reinforcing fibers across the joint can be used to increase bonding area.non slip decals for floor Before mixing epoxy, check all parts to be bonded for proper fit and surface preparation (Surface preparation��8.4.1), gather all the clamps and tools necessary for the operation, and cover any areas that need protection from spills. Two-step bonding 1. Wet-out bonding surfaces��Apply a neat resin/hardener mixture (without fillers) to the surfaces to be joined (Figure 8-8).
Wet out small or tight areas with a disposable brush. Wet out larger areas with a foam roller or by spreading the resin/hardener mixture evenly over the surface with a plastic spreader. You may proceed with step two immediately or any time before the wet-out coat becomes tack free. Using WEST SYSTEM Epoxy 65 Figure 8-8 Wet out the bonding surfaces by applying resin/hardener mixture with a brush or roller. Figure 8-9 Apply thickened epoxy to one of the bonding surfaces. Wet out�� To Pre-coat a joint's bonding surfaces with unthickened epoxy for maximum penetration and adhesion before an additional coat of thickened epoxy is applied. Especially useful and recommended on porous surfaces. Product tip��G/flex Epoxy is a toughened, resilient two-part epoxy engineered with excellent adhesion to plastics. Visit fiberglass composite sheet wholesalefor information on bonding to and repairing plastics with G/flex Epoxy. 8 2. Apply thickened epoxy to one bonding surface. Modify the resin/hardener mixture by stirring in the appropriate filler until it becomes thick enough to bridge any gaps between the mating surfaces and to prevent "resin-starved" joints.
Apply enough of the mixture to one of the surfaces, so that a small amount will squeeze out when the surfaces are joined together with a force equivalent to a firm hand grip (Figure 8-9). Thickened epoxy can be applied immediately over the wet-out surface or any time before the wet-out is no longer tacky. all kind of wood plastic composite lumberFor most small bonding operations, add the filler to the resin/hardener mixture remaining in the batch that was used for the wet-out. Mix enough resin/hardener for both steps. Add the filler quickly after the surface is wet out and allow for a shorter working life of the mixture.
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