Table 1.
Characteristics of phenol-formaldehyde resin for the test
Resin types Items
Powder resin
(Novolak type)
Liquid resin
(Resol type)
Solid content (%)
99
51-53
Melting point (℃)
80~95
Specific gravity
-
1.06
Gelation time (sec.)
80~120
80-95
Plate flow (mm)
30~35
Viscosity (cps)
-
45-65