Resin/Liquid Adhesive
We used European technology for our resin production, we could produce our high quality Resin according to the need of our customer and complied with International standard.
The different Types of resin that we produce are :
IW-200 : is a thermosetting Urea Formaldehyde Resin in a liquid state and satisfies all the requirements for a Type II Adhesive, this product would be best suited to those manufactures who can facilitate storage and handling of bulk type shipments. UFR is recommended for the manufacturing of particleboard, plywood, Medium Density Fiberboard and other wood working, and provides a water resistant, and stain free glue bond stronger than the wood it self.
UREA FORMALDEHYDE IW-200
1. SPECIFICATIONS
Appearance : Milky white viscous liquid
Viscosity, 30oC : 60 – 150 cPs
Specific gravity, 30oC : 1.192 – 1.194 g/cm3
pH, 30oC : 7.0 – 8.0
Gelatin time, 30oC : 60 – 180 minutes
Free formaldehyde : 0,5 % - 1,5 %
Solid content, : 49.5 %– 50.5 %
Storage life, 30oC :2 months
2. STANDARD
UK BS – 1455 types MR and INT
USA C – 35 - 36 types II and III
GERMAN DIN 1-74 PS 51-71 INT GRD
JAPANESE JPIC types II and III
3. HARDENER
IWH-200 is a hot bonding hardener suitable for IW-200, yellow powder
packed in bag by net weight 25 kg. if stored in a cold and dry place, could last for
minimum a year.
4. MIXING FORMULATION
A. UF IW-200 : 100
B. Wheat Flour : 10 – 20
C. Hardener IWH-200 : 0.5 – 1.0
D. Water : 2 – 6
APPLICATION
5. MIXING PROSEDURE
I. For high speed stirrer
First take all of (A), and next all of (B), mix about five minutes and
then take all of (C), finally (D). Before use, stir for 10-15 mins in order
to mix well.
II. For low speed stirrer
First take hair of (A), and next all of (B). start to mix for five minutes.
Then charge the rest of (A) and all of (C), Finally (D). Before use,stir
for 10-15 mins in order to mix well
6. POT LIFE OF RECOMMENDED GLUE MIX :
Temperature 20oC 25oC 30oC 35oC
Pot life( hours) 14 10 6 4
7. PRESSING TIME :
Basic setting time of recommended glue mix is influenced by temperature
Temperature 90oC 100oC 110oC 115oC
Basic setting time (minutes) 1,75 1,50 1,00 0,85
In order to have enough time for heat transfer, it is necessary to add additonal
time to the basic setting time, depending on the distance from press plate to
farthest glue line (FGL).
The additional time according to temperature is as follows (min/mm)
Press Plate Temperature
Distance :the farthest
Glue line : 90oC 100oC 110oC 115oC
Below 5 mm : 1.1 1.0 0.9 0.85
5 – 10 mm : 1.3 1.2 1.1 1.0
Above 10 mm : 1.5 1.4 1.3 1.2
Ex.1. for 3 ply panel of 2.5 mm core .1.0 mm face, back. The required press time
at 110oC is as follow :
Heat transfer time = 1,0 x 0,9 = 0,9 min
Basic setting time = = 1,0 min
+
Total pressing time = 1,9 min
Ex.2. for 7 ply panel of 2,5 mm inner cores and 1,0 mm face, back veneer.
Distance to the FGL = (1,0 + 2,5 + 2,5) mm = 6,0 mm
Heat transfer time = 6,0 x 1,1 min/mm = 6,6 min
Basic setting time = = 1,0 min
+
Total pressing time = 7,6 min
Note : speed of heat transfer depends on wood species and moisture content.
Therefore the above table is general indication for required additional time.
8. PREPARATION OF VENEER :
a. face of veneer must be clean, smoot and free of dust and stains of glue etc.
b. veneer must have a uniform thickness.
c. Moisture content to be controlled at :
8 % - 12 % for veneer
8 % - 16 % for inner core
d. High MC increases the risk of punk (reject) owing to higher pressing temperature.
9. GLUE SPREAD :
a. glue spread amount :
double glue line 30 – 36 g/SF and is to be adjusted according to veneer quality.
b. thick veneer requires higher glue spread amount due to rough face.
c. “high density wood” must be increased more 10 % up of glue than “low density
wood (meranti)”.
10. ASSEMBLY TIME :
a. generally, assembly time must be as short as possible and the glue mix must be
stil in viscous state when pressing is performed.
b. Although glue is rather dry, when bonded at above 100oC, it can achieve good
adhesion if pressure and pressing time are increased.
11. PRE PRESSURE :
a. lay up time is required in order to transfer glue mix from spreaded core to veneer
for suitable penetration.
b. it is important to avoid early curing i.e.: too low a glue spread for low M.C.
veneer, especially when climate is hot and dry.
c. cold press pressure must be lower than that of hot press. Suitable pressure is
determined by working condition, good results are usually obtained by 9-10
kg/cm2.
Cold press time is also depens on operating condition. 15 – 25 minutes is
normally used.