Polyester powder coating
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Eliminating Agglomeration Resulting from the Grinding Process
The investment in a liquid nitrogen cooling system has proven to be a very cost-effective solution to the powder agglomeration problem. The grinding of solid materials to produce powders is a common manufacturing step found in many industries.In the coatings industry,grinding may be used in the preparation of pigments and of powder coating.Of particular focus in this article is an application solution successfully deployed in the production of powder coating. In the powder coating industry,several different types of polymeric matricesRead More …
How to select a proper powder for your products
Choice of resin system, hardener, and pigment is just the beginning in selection the properties that one may require of the finish. Control of gloss, smoothness, flow rate, cure rate, ultra violet resistance, chemical resistance, heat resistance, flexibility, adhesion, corrosion resistance, exterior durability, ability to be reclaimed and reused, total first time transfer efficiency, and more, are some of the factors that must be considered when any new material is manufactured. Thermosetting powder coating are classified into five basic chemicalRead More …
Urethane cured polyester powder coating
Urethane cured polyester powder coating has excellent resistance to outdoor environments, toughness and very good appearance characteristics at 1 to 2 mil film thickness.A smooth, thin film that resists weathering and physical abuse makes the urethane polyesters a popular finish for high quality products. It is common to block the crosslinker in urethane polyesters with ecaprolactam.To begin the cross linking process, the material must reach a temperature above the blocking agent threshold. With e-caprolactam, unblocking occurs at approximately 360 °F (182Read 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 …
The problems with powder coating application over galvanized surface
Polyester powder coating over hot dip galvanized steel provides a high grade architectural finish to steel items with excellent atmospheric weathering characteristics.The powder coated product ensures maximum durability for steel components, which will generally provide 50 year+ rust free life spans in most architectural applications. Even so there are still some problems during this application. Hot dip galvanized surfaces have been acknowledged as difficult to powder coating since the technology was first developed in the 1960’s. Industrial Galvanizers commenced research inRead More …
D5 Creation