Phenol-formaldehyde (PF) Resin Manufacturing Process

Ingredients:

1. Phenol: 555 kg (based on 100% solid content)
2. Formalin: 1000 kg (Phenol: Formalin ratio – 1:1.8)
3. Caustic Soda: 45 kg (6-8% of Phenol)

Preparations:

• One day before, mix 45 kg Caustic Soda with 85 kg water, allow it to cool, and use it in a cool condition.
• Always use Caustic Soda in a cooled condition.

Manufacturing Process:

1. Load Phenol and Formalin into the resin kettle.
2. Stir well, then add the Caustic Soda solution.
3. Maintain a temperature of 85-90 degrees.
4. Control the excessive temperature using cooling water.
5. Continue the reaction and monitor the flow time.
6. When the flow time reaches 14-15 seconds within 1-1.5 hours, start the cooling process.
7. Complete the resin process when the temperature drops below 40 degrees.
8. Prepare for unloading.

Quality Check:

1. Measure the final flow time using a flow cup (B-4) – 18-20 seconds is considered normal for good resin properties.
2. Check water tolerance, maintaining it between 1:8 to 1:9.
3. After unloading, send a sample to the lab for a resin quality check.

Resin Properties:

• pH: 9 to 10
• Solid Content: 48-50%
• Water Tolerance: 1:8 to 1:9
• Flow Time: 18-20 seconds