l
F.8L Falco Construction Manual
D–18
Revision 4, March 1, 2002
Closed Assembly
. Joints must be assembled and pressure finally applied within the following
times:
Glue-Line Temperature (°C/°F)
Resin
10°/50°
15°/59°
20°/68°
25°/77°
30°/86°
35°/95°
500.F (fast)
3 hrs
1.25 hrs 1 hr
—
—
—
500.M (med)
—
2.75 hrs 2 hrs
1.5 hrs
1 hr
—
500.S (slow)
—
—
—
2 hrs
1.5 hrs
1 hr
Since the adhesive has gap-filling properties, only enough pressure is needed to give firm contact.
It is essential that the joint should be "made" before the adhesive gels.
RF Heating
. Resorcinol adhesives heat up more slowly under glue-line or stray-field heating than
UF adhesives but curing may be accelerated by the addition of common salt (sodium chloride) at
a rate of 1-2 parts by weight of salt to 100 parts by weight of resin. Precautions should be taken
against arcing which may lead to tracking and burning in the glue-line. Arcing can be avoided by
low spread, low moisture content and good jig design to ensure no air gaps between electrode and
glue-line and sufficient and even pressure on the joint during curing.
Pressing or Clamping
. The following table gives the minimum time for application of pressure:
Glue-Line Temperature (°C/°F)
Resin
10°/50°
15°/59°
20°/68°
25°/77°
30°/86°
35°/95°
40°/104°
500.F (fast)
14 hrs
4 hrs
3 hrs
1.5 hrs
1 hr
40 min
30 min
500.M (med)
—
8.5 hrs
5 hrs
4 hrs
2 hrs
1.25 hrs
45 min
500.S (slow)
—
—
10 hrs
5.5 hrs
4 hrs
3 hrs
2 hrs
Note
. Minimum pressing or clamping times stated are those required to give 1.33 kN/300 psi dry
shear strength on close joints conforming to BS 1204: Part 2. For dense or high moisture content
timbers, where a component is impermeable, or if the joint is liable to be strained immediately
after removal of pressure (e.g., as in the manufacture of laminated bends), the above times should
be increased. Aerodux glues will continue to gain strength until, after several days, full water-
resistant properties are developed.
Hot Pressing
. The press should be loaded and closed as quickly as possible in order to avoid pre-
curing. Basic setting times in minutes:
Glue-Line Temperature (°C/°F)
Resin
50°/122°
60°/140°
70°/158°
80°/176°
90°/194°
100°/212°
500.M (Medium)
30 min
12 min
6 min
3 min
2 min
1.5 min
500.S (Slow)
50 min
25 min
12 min
7 min
4 min
2.5 min
Heat Penetration
. The basic setting times stated refer to glue-line temperatures only and
allowance must be made for the heat to travel from the heat source. Heat penetration time will
vary according to density of the wood, moisture content and distance to the farthest glue-line.
The following table is a guide to the additional time required:
Up to 5mm
1 minute per millimeter of distance to the farthest glue-line
5-8mm
1.25 minute per millimeter of distance to the farthest glue-line
8-12 mm
1.5 minute per millimeter of distance to the farthest glue-line`
Summary of Contents for F.8L Falco
Page 1: ...F 8L Falco Construction Manual...
Page 7: ...l F 8L Falco Construction Manual Revision 4 March 1 2002...
Page 21: ...l F 8L Falco Construction Manual 1 8 Revision 4 March 1 2002...
Page 29: ...l F 8L Falco Construction Manual 2 8 Revision 4 March 1 2002...
Page 43: ...l F 8L Falco Construction Manual 5 4 Revision 4 March 1 2002...
Page 65: ...l F 8L Falco Construction Manual 9 6 Revision 4 March 1 2002...
Page 81: ...l F 8L Falco Construction Manual 10 16 Revision 4 March 1 2002...
Page 109: ...l F 8L Falco Construction Manual 15 4 Revision 4 March 1 2002...
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Page 387: ...l F 8L Falco Construction Manual 28 26 Revision 4 March 1 2002...
Page 393: ...l F 8L Falco Construction Manual A 6 Revision 4 March 1 2002...