A thermosetting liquid Phenol Formaldehyde resin, which meets all the requirements for a WBP (Water Boil Proof) Type Adhesive. The adhesive produces a water-resistant bond and is recommended for use in the manufacture of marine plywood, block board, bagasse board, and other wooden products for exterior use with high humidity and moisture.
- Form: Liquid
- Color: Reddish brown
- pH: 12 ± 1 (at 30°C)
- Viscosity: 60 – 250 cPS (at 30°C)
- Solid Content: 44 ± 1 %
- Gel Time: 15 – 40 minutes
- Specific Gravity: 1,168 – 1,180 g/cm3 (at 30°C)
- Water Solubility: over 20 times
- Shelf Life: +/- 1 month
Phenol Formaldehyde Resin complies with the following international standards:
|UK||: BS-1455 Type WBP|
|USA||: C-35-36 Type Technical and Type I|
|Germany||: DIN 68705 Type AW 100|
|Japan||: JPIC Type I|
SUITABLE FILLER AND HARDENER
In preparing the glue mix, Phenol Formaldehyde Resin must be mixed with Hardener and water. Besides that, a small number of other suitable fillers can be added to adjust the viscosity according to factory requirements.
For maximum product performance, it’s recommended that Phenol Formaldehyde Resin is mixed according to the following formulation:
|Phenol Formaldehyde Resin||: 100 parts by weight|
|Hardener||: 15 – 30 parts by weight|
|Water||: 0 – 5 parts by weight|
The above recommended formulation needs to be mixed according to certain steps to guarantee maximum gel time. The steps are as follows:
- First pour all of the required Phenol Formaldehyde Resin.
- Then pour in the Hardener.
- Mix the two components for about 5 minutes.
- Last add more water and mix for 5 – 10 minutes more. The glue mix is then ready.
The above recommended formulation will have a gel time that varies according to room temperature, which is as follows:
|Gel Time/ Pot Life (hours)||11||9||8||4|
Before applying Phenol Formaldehyde Resin, the veneers’ surfaces must be prepared to be clean and free of dust and other things. The veneers’ moisture content must also be controlled at maximum of 10% for both veneers and cores.
Phenol Formaldehyde Resin application with single glue line uses about 160 – 200 g/m2 of glue, while a glue spread with double glue line uses 32 – 40g/sqft. Glue spread is adjusted according to thickness. Thicker veneers need more glue spread due to having rough surface.
Normal pressure for pre-press is 9 – 10 kg/cm2, and being done for about 15 – 20 minutes, which is adjustable to the working conditions of the factory.
Generally panel assembly must be done with time as short as possible, and the glue mix must still be viscous when hot pressing is applied. A dry glue mix will decrease the panel quality.
HOT PRESS – HOT PRESS TIME
Hot press process on Phenol Formaldehyde Resin application is best done under the following conditions:
|Temperature||: 135 ± 5°C|
|Pressure||: 10 kg/cm2|
The above conditions will result in hot press time as follows:
|Below||6 mm (3-ply)||45 – 50 seconds/mm|
|9 mm (5-ply)||50 – 55 seconds/mm|
|12 mm (5-ply)||45 – 50 seconds/mm|
|15 mm (7-ply)||50 – 55 seconds/mm|
|28 mm (11-ply)||55 – 65 seconds/mm|
HOT PRESS – HOT PRESS PRESSURE
Optimal pressure for hot press is 9 – 10 kg/cm2. Hot press is adjusted to wood thickness and factory working conditions.
CLEANING AND HANDLING
Mixing and spreading equipment must be cleaned before the glue leftover cures. This can be done easily with water. But if the glue has dried, it can be peeled off easily.
Phenol Formaldehyde Resin is alkali in nature of chemical reactions. When the surface of the resin liquid touches air, it will form a thin layer.
Contact with the skin must be washed off with water. Phenol Formaldehyde Resin is soluble in water easily, in any proportions.
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