NEWS

Electrostatic Enamel Powder Quality

Dry electrostatic spray enamel has high requirements on the accuracy of the particle size of the electrostatic enamel powder and the thickness of the porcelain layer. The particle size is generally 8~16g with a 350 mesh sieve and the thickness of the porcelain layer is 100~200μm. These two indicators are important for enamel products. The impact is as follows:

Granularity of electrostatic enamel powder
350 mesh sieve residue/g	4	8	12	16	20
Adherence efficiency%	25	32	30	31	20
Adhesion	94	98	94	95	77
Powder flowability	excellent	good	good	good	poor
Appearance after firing	poor	good	good	good	poor

Dry electrostatic enamel coating thickness
Thickness /μm	Powder layer after coating and drying	Appearance after firing
25	good	poor
50	good	poor
100	good	good
150	good	good
200	good	good
250	crack	poor
300	chip

Main technical properties of electrostatic enamel powder:

1. Resistivity: 1014Ω•cm. A humid environment can cause the resistivity to decrease by several orders of magnitude.

2. Particle size distribution: 0.1~90μm, average particle size is about 18μm.

3. Adsorption: After spraying reaches the normal thickness for 10 minutes, the adsorption rate should maintain 70%~90%.

4. Water content: 0.05%~0.08%.

The most popular application of electrostatic dry spraying process on the market is the high-end oven industry, especially the built-in electric oven, whose inner container and main appearance parts are all sprayed with electrostatic dry powder.

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