Technical data

13773-001
51-20
Page 6 30 Nov 2000
(2) Transfer Method
This method is used when the repair is in a difficult position. The Transfer Method is similar to
Laminating in Place, except the repair plies are wet with resin and then stacked-up on a clean
sheet of plastic or release film. Repair plies are then centered over the damaged area.
WARNING:
Place each repair ply in the same direction as the original plies were posi-
tioned. Every other repair ply must have the directional fiber orientation
staggered to prevent the repair from warping.
Note: Laminates that have come in contact with moisture must be dried before perform-
ing any repair. If moisture contamination is confined to a small area, the area may
be dried with a heat gun. Dry the contaminated area for at least two minutes while
keeping the nozzle a minimum of 10 inches from the part.
If large areas, or the entire part, is moisture contaminated, place part in an air cir-
culating oven for a minimum of 15 minutes at 150° F to 200° F air temperature.
Remove part from oven and allow part to cool down in a dry area.
(a) Prepare surface as previously described in 51-20 “Laminating in Place”. (Refer to 51-20)
(b) Cut two sheets of plastic approximately 6 inches larger than the total repair area. Place
one sheet on a flat clean work surface.
WARNING:
When using peel ply, position the peel ply on the outer ply (largest)
only. Never bond repair plies to peel ply. If plies are bonded on top of
peel ply, the repair will not develop full strength.
(c) If repairing an outer surface, apply a layer of peel ply with the same shape and size of the
largest repair ply onto the plastic sheet.
Note: Peel ply will not stretch when brushed and becomes transparent when wet
with resin. Peel ply can be worked more aggressively than repair plies.
(d) Mix resin. (Refer to 51-20)
(e) With a clean brush apply a thin coat of mixed resin directly onto the peel ply or plastic
sheet (if peel ply is not being used).
CAUTION: Place each repair ply in the same direction as the original plies were posi-
tioned. Every other repair ply must have the directional fiber orientation
staggered to prevent the repair from warping. Use the template and 0° ref-
erence line to help align the ply (use the bottom edge of the plastic sheet as
the 0° reference line).
(f) Center the largest repair ply (last repair ply installed on damaged laminate) onto the resin-
wet peel ply or plastic sheet.
(g) Lightly flatten ply with brush.
Note: Allow time for resin to wick through the ply from below. With the brush, work
air bubbles to the edge of the ply. Stipple (tap the ply) with the end of the
brush. Brushing will pull and distort the ply.
(h) If necessary, add resin to saturate dry areas. When ply is saturated and air bubbles have
been removed, coat the ply with a thin layer of resin.