Thursday, June 7th, 2012
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Location of stoving ovens
The stoving oven should be situated at least 1m from the powder spraying installation and arranged so that powder cannot accumulate or be spilled near to the oven,its air intakes,hot surfaces or any electrical apparatus.Air movement within the oven should not be so high as to blow off powder from the work piece before fusion . The clean air change requirement of the oven should be known and visibly marked on the oven. For conveyor ovens and especially those usingRead More …
How silver ions works in antimicrobial powder coating
Antimicrobial powder coating is widely used in many industries nowadays,such as Building Products,Food Service,Healthcare,Home Products and Packaging.This kind powders contain a silver ions,which act as antagonist over many bacterium. With the presence of moisture, silver ions are gradually released to function as an anti-microbial material. Silver ions charged with plus are drawn toward the microbe’s cell wall charged with minus to disturb the electrical balance. The cell wall of the microbe thus bursts and is extinguished. As silver ions enterRead More …
Requirements for powder coating over hot dip galvanizing
The following specification is recommended: Use zinc phosphate pretreatment if highest adhesion is required. Surface must be perfectly clean. Zinc phosphate has no detergent action and will not remove oil or soil. Use iron phosphate if standard performance is required. Iron phosphate has a slight detergent action and will remove small amounts of surface contamination. Best used for pre-galvanized products. Pre-heat work prior to powder application. Use ‘degassing’ grade polyester powder coating only . Check for correct curing by solventRead More …
The solutions for the problems of powder coating over hot dip galvanizing
1. Incomplete curing: Polyester powder coating powder is thermosetting resins that cross-link to their final organic form by being maintained at a temperature (typically 180 o C), for about 10 minutes. Curing ovens are designed to provide this time at temperature combination. With hot dip galvanized items, with their heavier section thickness, it is necessary to ensure that sufficient stoving time is allowed to meet the curing specifications. Pre-heating of the heavier work will assist in accelerating the curing processRead More …
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