Jcb Backhoe Bucket Teeth Forging Bucket Teeth 4T4702RC Heavy Equipment Spare Parts

The key control of the topcoat application in the bucket tooth spray painting process

The rheological properties of orange peel paint ‌ : The thixotropic index (TI value) should be controlled between 3 and 5, which is achieved by adding fumed silica. The spraying viscosity should be adjusted to 18-22 seconds (for -4 cups), and an air pressure of 0.4-0.6MPa can achieve an ideal orange peel effect.

The crosslinking density of the varnish ‌ : 2K. The NCO/OH molar ratio of polyurethane varnish should be strictly formulated at 1.05:1. Excessive isocyanate will cause the paint film to become brittle. The wet film thickness should be monitored with a DeFelsko thickness gauge, with an error of ±5μm.