Derived from dry powder coating of metals, electrostatic powder coating for pharmaceuticals is a technology for coating drug solid dosage forms. In this technology, coating powders, containing coating polymers, pigmen...Derived from dry powder coating of metals, electrostatic powder coating for pharmaceuticals is a technology for coating drug solid dosage forms. In this technology, coating powders, containing coating polymers, pigments, and other excipients, are directly sprayed onto the surface of the solid dosage forms through an electrostatic gun without using any organic solvent or water. The deposited coating powders are further cured to form a coating film. Electrostatic powder coating technology has many advantages compared to other pharmaceutical coating methods. It can eliminate the limitations caused by the organic solvent in solvent coating such as environmental issues and health problems. And electrostatic powder coating technology also surpasses aqueous coating due to its shorter processing time and less energy consumption, leading to a lower overall cost. Furthermore, the utilization of electrical attraction can promote the movement of coating powders towards the substrate, leading to an enhanced coating powder adhesion and coating efficiency, which make it more promising compared to other dry coating technologies. The objective of this review is to summarize the coating principles, apparatus, and formulations of different electrostatic powder coating technologies, giving their advantages and limitations and also analyzing the future application in the industry for each technology展开更多
Powder coating is an important process in the food industry,especially for snack foods such as potato chips,to create variety in food products.Electrostatic coating has been adopted in order to provide better transfer...Powder coating is an important process in the food industry,especially for snack foods such as potato chips,to create variety in food products.Electrostatic coating has been adopted in order to provide better transfer efficiency and lower the dust produced during coating.Studying the effect of electrode voltage on coating efficiency and evenness of baked potato chips using the developed electrostatic powder coating system was the main purpose of this research.Different types of NaCl(refined and table salts)were coated on baked potato chips at 0,30,40,50,60,and 70 kV.After coating with either refined or table salt,transfer efficiency,adhesion after coating,coating evenness and texture of samples were determined.Higher transfer efficiency,adhesion and coating evenness were observed when electrostatic coating was conducted at 30-50 kV.Most samples with higher transfer efficiency,adhesion and evenness were obtained after electrostatic coating.However,it did not significantly affect hardness of baked potato chips.展开更多
文摘Derived from dry powder coating of metals, electrostatic powder coating for pharmaceuticals is a technology for coating drug solid dosage forms. In this technology, coating powders, containing coating polymers, pigments, and other excipients, are directly sprayed onto the surface of the solid dosage forms through an electrostatic gun without using any organic solvent or water. The deposited coating powders are further cured to form a coating film. Electrostatic powder coating technology has many advantages compared to other pharmaceutical coating methods. It can eliminate the limitations caused by the organic solvent in solvent coating such as environmental issues and health problems. And electrostatic powder coating technology also surpasses aqueous coating due to its shorter processing time and less energy consumption, leading to a lower overall cost. Furthermore, the utilization of electrical attraction can promote the movement of coating powders towards the substrate, leading to an enhanced coating powder adhesion and coating efficiency, which make it more promising compared to other dry coating technologies. The objective of this review is to summarize the coating principles, apparatus, and formulations of different electrostatic powder coating technologies, giving their advantages and limitations and also analyzing the future application in the industry for each technology
基金This work was supported by a grant from Thailand Research Funding and Office of the Higher Education Commission,contract no.MRG6080261.
文摘Powder coating is an important process in the food industry,especially for snack foods such as potato chips,to create variety in food products.Electrostatic coating has been adopted in order to provide better transfer efficiency and lower the dust produced during coating.Studying the effect of electrode voltage on coating efficiency and evenness of baked potato chips using the developed electrostatic powder coating system was the main purpose of this research.Different types of NaCl(refined and table salts)were coated on baked potato chips at 0,30,40,50,60,and 70 kV.After coating with either refined or table salt,transfer efficiency,adhesion after coating,coating evenness and texture of samples were determined.Higher transfer efficiency,adhesion and coating evenness were observed when electrostatic coating was conducted at 30-50 kV.Most samples with higher transfer efficiency,adhesion and evenness were obtained after electrostatic coating.However,it did not significantly affect hardness of baked potato chips.
