Emerging and developing technology. (Powder Coatings Corner).
Despite the numerous advantages of powder coating Powder coating is a type of dry coating, which is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension technology, technical limitations such as elevated temperature requirement, thinner and smoother films, more uniform application films, speed and precision of color not of the white race; - commonly meaning, esp. in the United States, of negro blood, pure or mixed.
See also: Color are culpable Blameworthy; involving the commission of a fault or the breach of a duty imposed by law.
Culpability generally implies that an act performed is wrong but does not involve any evil intent by the wrongdoer. for the plateaued growth and the absence of further share gain from the dominant liquid coating market segments. For powder coating to resume its conquest of traditional liquid coating segments and new markets, the critical and pressing technology gaps such as low temperature cure formulations, thinner and smoother films must be bridged. Solutions must be sought to address powder properties, coating appearance and coating properties.
Unless cure temperatures of powder can be substantially lowered, liquid technologies will continue to dominate in areas where the coating is field-applied and thermal curing is not feasible, such as industrial maintenance coating and coating heat-sensitive substrates such as wood, plastics, glass, paper and composites. Low-temperature-cured powder coating has moved from being a technical curiosity to emerge as a viable technology poised to have significant impact on the major facets of the organic coating market and the coating industry as a whole. Advances in new low-temperature powder coating chemistries will further open up uncharted coating applications and market segments for broader powder application and gain market share beyond the seemingly stagnated nine percent share of the industrial finishing Industrial Finishing is a broad term used to describe any kind of secondary process done to any metal, plastic, or wood product used in a common market such as automotove, OEM, telecommunications or point-of-purchase. market it currently enjoys. The emergence of practical, low-temperature cure powders and their further development to provide better performing coatings and continuous cost savings to customers will not only follow powder coatings' acclaimed tradition of prominent quality performance and environmental excellence, but also contribute to energy management standards and resource sustainability.
Cure Regimes and Feasible Technologies
Reduction of cure temperatures has been pursued by the powder coating industry consistently over the years. Indeed, some progress has been made: in the decorative market, powders curing below 400[degress]F were once considered low temperature cure. Product definitions of low temperature powders now vary from supplier to supplier, but on the average low temperature cure powders today must cure at 325[degrees]F and below. Low temperature cure coating powders could be classified into two categories and temperature cure regimes. There are two underlying technologies for the two categories: powder formulations with cure schedules between 325[degrees]F and 200[degrees]F are defined as low temperature thermal cure; UV-cure formulations are also typically cured in this range. Even within this conventional low cure range, some performance and appearance properties are sacrificed, and there are no robust technical solutions that give differentiated products. With current technology, UV-cured powder technology seems more realistic and feasible for lower temperature cure below 200[degrees]F.
Temperature and viscosity profiles show how fluid powder coating formulations become and for what time duration. Fluidity and its duration time is determined by factors such as temperature and its rate of rise, molecular weight build-up build·up also build-up
1. The act or process of amassing or increasing: a military buildup; a buildup of tension during the strike.
2. , kinetics kinetics: see dynamics.
Kinetics (classical mechanics)
That part of classical mechanics which deals with the relation between the motions of material bodies and the forces acting upon them. of cross linking, types of additives (e.g. pigment pigment, substance that imparts color to other materials. In paint, the pigment is a powdered substance which, when mixed in the liquid vehicle, imparts color to a painted surface. ) and their volume concentrations. The interplay between rheology and reactivity in these formulations determine the smoothness or lack thereof (e.g., orange peel) of the final films formed.
In conventional thermal curing of powder coating, the melting/flowing/ leveling process (cycle) has, invariably in·var·i·a·ble
Not changing or subject to change; constant.
in·vari·a·bil , some degree of overlap with the curing process (cycle) even with powders formulated to cure at fairly high temperatures. This overlap is mainly responsible for the orange peel and the lack of great smoothness synonymous with synonymous with
adjective equivalent to, the same as, identical to, similar to, identified with, equal to, tantamount to, interchangeable with, one and the same as the technology compared to liquid coating. With current lower temperature curing powders, this phenomenon is exacerbated because the cycles are compressed within a narrower process window to give a bigger overlap. The greater the overlap between the melt/flow/leveling and cure cycles the worse the orange peel and smoothness of the final film. In the ideal case, the two cycles are distinctly separated, so that the powder melts, flows and levels to form a smooth film before the onset of a reaction to cure. When the cure reaction is accelerated, the duration of low viscosity is shortened. UV and EB curing provide examples of this ideal separated cycles case: powders melt, flow and level thermally without any cross linking and hardening hardening, in metallurgy, treatment of metals to increase their resistance to penetration. A metal is harder when it has small grains, which result when the metal is cooled rapidly. and then a reaction to harden hard·en
v. hard·ened, hard·en·ing, hard·ens
1. To make hard or harder.
2. To enable to withstand physical or mental hardship.
3. the film is brought about using UV or EB. Delay of the cure reaction, keeps a low viscosity for a longer time.
In new and emerging technologies, advances driven by new government regulations, cost reduction, higher productivity, better products, new materials and new ideas "New Ideas" is the debut single by Scottish New Wave/Indie Rock act The Dykeenies. It was first released as a Double A-side with "Will It Happen Tonight?" on July 17, 2006. The band also recorded a video for the track. are being made rapidly in the key coating technologies, including waterborne, high solids, electrodeposition e·lec·tro·de·pos·it
tr.v. e·lec·tro·de·pos·it·ed, e·lec·tro·de·pos·it·ing, e·lec·tro·de·pos·its
To deposit (a dissolved or suspended substance) on an electrode by electrolysis.
The substance so deposited. and autodeposition. The pace at which low temperature cure technologies develop and how well they address technology gaps, cost reduction and other customers' needs will determine which new markets are captured and how many gains are made to advance the market share of powder coatings.
Nikoi Annan is market manager with Morton Powder Coatings, a Rohm and Haas Rohm and Haas Company (NYSE: ROH), a Philadelphia, Pennsylvania based company, manufactures miscellaneous materials. A Fortune 500 Company, Rohm and Haas employs more than 17,000 people in 27 countries. The annual sales revenue of Rohm and Haas stands at about USD 8.2 billion. Company.