Powder coating efficiency of small particles and their agglomeration in circulating fluidized bed

Kage, Hiroyuki; Dohzaki, Mitsunaga; Ogura, Hironao; Matsuno, Yasunari

doi:10.1007/bf02708143

Cited by 17 publications

(2 citation statements)

References 6 publications

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“…Here, a hot metal test piece is immersed in the fluidised powder. The powder dissolves, melts and cures, resulting in a smooth polymer surface on the test piece [209]. Due to the partial crystallisation of polyester resin, the effect on the properties of the powder coating film, especially the mechanical properties, cannot be ignored in industrial applications [210].…”

Section: Co-extrusionmentioning

confidence: 99%

Liquid and Solid Functional Bio-Based Coatings

et al. 2021

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The development of new bio-based coating materials to be applied on cellulosic and plastic based substrates, with improved performances compared to currently available products and at the same time with improved sustainable end of life options, is a challenge of our times. Enabling cellulose or bioplastics with proper functional coatings, based on biopolymer and functional materials deriving from agro-food waste streams, will improve their performance, allowing them to effectively replace fossil products in the personal care, tableware and food packaging sectors. To achieve these challenging objectives some molecules can be used in wet or solid coating formulations, e.g., cutin as a hydrophobic water- and grease-repellent coating, polysaccharides such as chitosan-chitin as an antimicrobial coating, and proteins as a gas barrier. This review collects the available knowledge on functional coatings with a focus on the raw materials used and methods of dispersion/application. It considers, in addition, the correlation with the desired final properties of the applied coatings, thus discussing their potential.

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Section: Co-extrusionmentioning

confidence: 99%

Liquid and Solid Functional Bio-Based Coatings

et al. 2021

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“…The coating process was conducted with intermittent interruption of the feed flow rate of the coating solution in order to prevent particle agglomeration, as described elsewhere [29][30][31] . Usually, feed flow rates were kept constant for periods of 20 s and stopped for periods of 1 min and 40 s. Coating operations were performed as presented in Table 1.…”

Section: Coating Of Urea Granulesmentioning

confidence: 99%

Coating of urea granules by in situ polymerization in fluidized bed reactors

et al. 2019

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ObstractThe main objective of the present work is to produce and characterize urea granules coated with polymers prepared with aqueous solutions of acrylic acid and glycerol. Both coating and drying of urea granules were performed in a fluidized bed reactor. Fourier transform infrared spectroscopy analyses indicated the presence of poly(acrylic acid) and acrylic acid / glycerol copolymers on the granule coating and the formation of chemical bonds between urea and the polymer coating. Scanning electron microscopy images showed that the original and coated urea granules presented different characteristics, reinforcing the idea that coating occurs in the fluidized bed. Finally, rates of urea release showed that the coated granules presented slightly slower rates of urea dissolution in water due to the presence of the coating layer. Therefore, it is shown that it is possible to produce coated urea granules through in-situ polymerization onto the granule surface using a fluidized bed.

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