◇Ceridust 3620 is easily dispersed and is generally added to printing inks at the stage of the production process. In the production of solid inks, the additive needs to be stirred in a high-speed stirrer (dissolver) and then evenly dispersed by a three-roller press. For liquid inks, a stirrer with a high shearing force such as a dissolver or a sander can be used.
◇The specific amount of added depends on the system used and the formulation, and is generally 0.8-2% of the total formulation. Moisten 3620 with solvent or mixed solution before adding to printing ink.
◇The amount of wax can be used up to 30% for liquid dispersions and 50% for solids (paste). When added to printing inks, in most cases, no additional grinding of the wax particles is required, and care should be taken not to heat more than 70°C during the dispersion to avoid deformation of the wax particles and recrystallization after cooling, leading to coalescence and affecting its performance.
Advantages and disadvantages of powder coating and coating technology
Powder coatings and coating technology have received attention from all over the world as resource-saving, energy-saving, pollution-free and high production efficiency. Among various coatings, powder coatings are the fastest growing in recent years. In the 1970s, When it comes to the advantages of powder coatings, some people predict that traditional solvent-based coatings will gradually be replaced by powder coatings. The era of powder coatings will soon come. However, more than 30 years have passed. Although the variety of powder coatings has increased, the production volume has increased. However, the historical proportion of total paint output has also increased significantly, but the proportion is less than 10%, and it has not reached the predicted target. This is because powder coatings do have many advantages, but it is not a perfect paint variety, and there are certain shortcomings, and these shortcomings cannot be resolved quickly, and it will take long-term efforts in the future to gradually resolve them. Powder coating and coating technology have the following advantages and disadvantages.
Advantages of powder coating and coating technology
General powder coatings are solid powder materials that do not contain volatile organic solvents and water, because they do not contain organic materials.
Classification and varieties of powder coatings
Powder coatings can be classified according to resin types, coating methods, coating functions and coating appearance.
When classified according to the type of film-forming resin of powder coatings, it can be divided into two categories: thermoplastic powder coatings and thermosetting powder coatings. In thermoplastic powder coatings, it can be divided into polyethylene powder coatings, polypropylene powder coatings, and polychlorinated powder coatings according to the types of resins. Ethylene powder coatings, polyamide wax (nylon) powder coatings, polyester powder coatings, ethylene/vinyl acetate copolymer (EVA) powder coatings, cellulose acetate butyrate powder coatings, chlorinated polyether powder coatings, polyphenylene sulfide powder coatings, Polyvinyl fluoride powder coating, etc. Among these powder coatings, the more widely used coatings in my country are polyethylene powder coatings, polyamide (nylon) powder coatings, and polyvinyl chloride powder coatings, polyphenylene sulfide powder coatings and polyvinyl fluoride powder coatings. Thermosetting powder coatings can be divided into (pure) epoxy powder coatings, epoxy-polyester powder coatings, (pure) polyoma powder coatings, polyurethane powder coatings, acrylic powder coatings, etc. according to the type of resin.
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