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Antimicrobial polymer additive technology achieves new milestone
FOCUS
ON
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data, monitor or even control powder equipment in real time. Undoubtedly, these outstanding mobile apps are the first of many to be developed that harness the interactive capability of our mobile devices. Such apps bring the powder coating world closer together and allow 24/7 access to information for new projects and to solve problems with old ones. But, hopefully the technology also makes us more productive and efficient so we can occasionally kick back and enjoy that movie we found on our mobile device.
raw material and labour costs. It is very unlikely that any other way of opacifying a coating would give satisfactory hiding. It is known that TiO2 is the most efficient scatterer of visible light. To achieve a layer thickness of 1.5 relative to this pigment, calculations show that a material with a refractive index of 2.5 would be required. It is highly unlikely that such a material would be available, but it was not considered in this work. So, no acceptable opacifier is to be expected from among the known inorganic pigments.
Original Source: Powder Coated Tough, 29-Sep-2017, (Website: https://www. powdercoatedtough.com), Copyright Powder Coated Tough 2017.
Original Source: European Coatings, 10 – 2017, (Website: http://www.european-coatings. com), Copyright Vincentz Network 2017.
Antimicrobial polymer additive technology achieves new milestone Nouvex, an antimicrobial polymer additive developed by Purdue School of Materials Engineering and was commercialized by Poly Group LLC, has been approved by the US Environmental Agency, Office of Pesticide Programs, Antimicrobial Division as a material preservative. The technology is used to prevent microbial contamination of textiles, thermoplastics, water- and solventbased coatings and powder coatings. Poly Group intends to keep developing the technology aiming for another approval from FDA and EPA. The firm has entered a deal to incorporate the technology into urinary catheters.
Original Source: Plastics Today Medical Channel, 14-Sep-2017, (Website: http://www. plasticstoday.com), Copyright UBM Canon 2017.
Ruling Opacity out of Existence The French authorities have proposed classifying TiO2 as carcinogenic, which would mean consumer paints could not contain sufficient amounts to create opacity without labelling. The use of titanium dioxide in paints has been the topic of many discussions since the French authorities issued a proposal to classify it as Carcinogenic Category 1B [1]. This labelling would mean it could not be used in consumer paints in concentrations above 0.1%. It is alternatively possible that a Category 2 classification would be adopted, meaning that adverse product labelling (suspected of causing cancer) would be required for liquid paints containing more than 1%. For opacifying purposes, this low level of material is not relevant and this would therefore mean that hiding would have to be achieved without TiO2. A theoretical study was therefore carried out to estimate the potential of other opacifying materials to replace TiO2 as a white pigment. The maximum hiding power of other opacifying substances was evaluated. A very big increase in coating thickness could be required, increasing both
November 2017
Technology Interchange Manufacturing Powder Coatings: PART TWO Milling and Sifting Producing a powder coating is a multi-step process. It can be described as being semicontinuous because it begins as a batch process (weighing and pre-mixing) but evolves into a continuous process (extrusion and milling). In the last Technology Interchange article, we discussed the first steps in manufacturing a powder coating. This consists of weighing, premixing and extrusion. This edition covers what happens to the flakes generated from the extrusion process. The next step in manufacturing a powder coating involves reducing the particle size of the chips or flakes that have been collected off the cooling belt. The goal here is to pulverize these flakes into a fine powder that possesses a particle size distribution usable on a customer’s application equipment. This is typically accomplished with an airclassified mill. From the grinding chamber, the powder is pulled through a cyclone and drops into a sifting device. The sifting device eliminates a very small coarse fraction of the ground powder. This coarse material can be reintroduced into the grinding process to optimize the yield. Sifting can be accomplished with either a rotary sifter or a flat deck screener. With a rotary sifter the powder is introduced into a chamber consisting of a rotating vanes affixed to a horizontal shaft. The vanes propel the powder against a cylindrical screen. The fine particles pass through the screen and the coarse particles are carried beyond the screen and collected as “overs.” These coarse particles can be reintroduced into the mill to improve yield. The process of manufacturing a powder coating is a relatively complex semicontinuous endeavor. As the powder material enters the final steps of milling, sifting and packaging the formulation is essentially fixed and cannot be altered. Milling is a complicated process that is influenced by a number of factors including the nature of the material, and process conditions such as temperature, feed rates and the speed of grinding components. The final steps in manufacturing a powder
COATINGS coating have a critical influence on the particle size distribution and ultimately the application performance at the powder applicator.
Original Source: Powder Coated Tough, 29Sep-2017, (Website: https://www. powdercoatedtough.com), Copyright Powder Coated Tough 2017.
Color and Effect Pigments in Powder Coatings The ability of color to produce a psychological impact has been confirmed through many studies, including Satyendra Singh’s 2006 study on the “Impact of Color on Marketing.” While individual reactions to a color may differ, the predominant effect that certain colors elicit is well understood. This article will focus on color psychology and how the use of effect pigments can enhance viewer perceptions of the Pantone hues in powder coating. Color psychology is widely used in marketing to entice potential buyers and to inspire brand confidence. Consumer studies indicate visual appearance and color are determining factors for more than 85% of product purchases according to data from Secretariat of the Seoul International Color Expo 2004. Despite 35% of Americans selecting blue as their favorite hue according to Kathy Lamancusa’s “Emotional Reactions to Color” study, effect-based black and white color’s associations appear to resonate more with buyers seeking similar attributes in their new car. The preference for effects in the white and black color space is even greater in the luxury car market according to Axalta’s 2015 Global Automotive Color Popularity Report. Pearlescent micas and aluminum pigments produce luster and brilliance to create a vibrant depth in both liquid and powder coatings. Pearlescent white micas add a soft, silky richness that creates a natural and soft impression in coatings. When used effectively, pearlescent micas in a variety of hues and particle size fractions can produce eye-catching results that draw attention without overwhelming a finish. Aluminum pigments can produce subtle shifts in brightness or dazzling brilliant sparkles depending upon the flake morphology and particle size. The reflective silver glow of aluminum pigments elicits a sense of timeless style. Aluminum pigments and pearlescent micas create the illusion of spatial depth that differentiates the coating from non-effect pigmented offerings. Effect pigment selections are tailor made to create warmth, add energy, produce eye-catching impact or subtly draw positive attention. Effect pigments provide a simple solution to broaden the appeal and enhance the color message specific to the powder coating’s end use.
Original Source: Paint & Coatings Industry, 3Oct-2017. (Website: http://www.pcimag.com), Copyright BNP Media 2017.
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ON
POWDER
data, monitor or even control powder equipment in real time. Undoubtedly, these outstanding mobile apps are the first of many to be developed that harness the interactive capability of our mobile devices. Such apps bring the powder coating world closer together and allow 24/7 access to information for new projects and to solve problems with old ones. But, hopefully the technology also makes us more productive and efficient so we can occasionally kick back and enjoy that movie we found on our mobile device.
raw material and labour costs. It is very unlikely that any other way of opacifying a coating would give satisfactory hiding. It is known that TiO2 is the most efficient scatterer of visible light. To achieve a layer thickness of 1.5 relative to this pigment, calculations show that a material with a refractive index of 2.5 would be required. It is highly unlikely that such a material would be available, but it was not considered in this work. So, no acceptable opacifier is to be expected from among the known inorganic pigments.
Original Source: Powder Coated Tough, 29-Sep-2017, (Website: https://www. powdercoatedtough.com), Copyright Powder Coated Tough 2017.
Original Source: European Coatings, 10 – 2017, (Website: http://www.european-coatings. com), Copyright Vincentz Network 2017.
Antimicrobial polymer additive technology achieves new milestone Nouvex, an antimicrobial polymer additive developed by Purdue School of Materials Engineering and was commercialized by Poly Group LLC, has been approved by the US Environmental Agency, Office of Pesticide Programs, Antimicrobial Division as a material preservative. The technology is used to prevent microbial contamination of textiles, thermoplastics, water- and solventbased coatings and powder coatings. Poly Group intends to keep developing the technology aiming for another approval from FDA and EPA. The firm has entered a deal to incorporate the technology into urinary catheters.
Original Source: Plastics Today Medical Channel, 14-Sep-2017, (Website: http://www. plasticstoday.com), Copyright UBM Canon 2017.
Ruling Opacity out of Existence The French authorities have proposed classifying TiO2 as carcinogenic, which would mean consumer paints could not contain sufficient amounts to create opacity without labelling. The use of titanium dioxide in paints has been the topic of many discussions since the French authorities issued a proposal to classify it as Carcinogenic Category 1B [1]. This labelling would mean it could not be used in consumer paints in concentrations above 0.1%. It is alternatively possible that a Category 2 classification would be adopted, meaning that adverse product labelling (suspected of causing cancer) would be required for liquid paints containing more than 1%. For opacifying purposes, this low level of material is not relevant and this would therefore mean that hiding would have to be achieved without TiO2. A theoretical study was therefore carried out to estimate the potential of other opacifying materials to replace TiO2 as a white pigment. The maximum hiding power of other opacifying substances was evaluated. A very big increase in coating thickness could be required, increasing both
November 2017
Technology Interchange Manufacturing Powder Coatings: PART TWO Milling and Sifting Producing a powder coating is a multi-step process. It can be described as being semicontinuous because it begins as a batch process (weighing and pre-mixing) but evolves into a continuous process (extrusion and milling). In the last Technology Interchange article, we discussed the first steps in manufacturing a powder coating. This consists of weighing, premixing and extrusion. This edition covers what happens to the flakes generated from the extrusion process. The next step in manufacturing a powder coating involves reducing the particle size of the chips or flakes that have been collected off the cooling belt. The goal here is to pulverize these flakes into a fine powder that possesses a particle size distribution usable on a customer’s application equipment. This is typically accomplished with an airclassified mill. From the grinding chamber, the powder is pulled through a cyclone and drops into a sifting device. The sifting device eliminates a very small coarse fraction of the ground powder. This coarse material can be reintroduced into the grinding process to optimize the yield. Sifting can be accomplished with either a rotary sifter or a flat deck screener. With a rotary sifter the powder is introduced into a chamber consisting of a rotating vanes affixed to a horizontal shaft. The vanes propel the powder against a cylindrical screen. The fine particles pass through the screen and the coarse particles are carried beyond the screen and collected as “overs.” These coarse particles can be reintroduced into the mill to improve yield. The process of manufacturing a powder coating is a relatively complex semicontinuous endeavor. As the powder material enters the final steps of milling, sifting and packaging the formulation is essentially fixed and cannot be altered. Milling is a complicated process that is influenced by a number of factors including the nature of the material, and process conditions such as temperature, feed rates and the speed of grinding components. The final steps in manufacturing a powder
COATINGS coating have a critical influence on the particle size distribution and ultimately the application performance at the powder applicator.
Original Source: Powder Coated Tough, 29Sep-2017, (Website: https://www. powdercoatedtough.com), Copyright Powder Coated Tough 2017.
Color and Effect Pigments in Powder Coatings The ability of color to produce a psychological impact has been confirmed through many studies, including Satyendra Singh’s 2006 study on the “Impact of Color on Marketing.” While individual reactions to a color may differ, the predominant effect that certain colors elicit is well understood. This article will focus on color psychology and how the use of effect pigments can enhance viewer perceptions of the Pantone hues in powder coating. Color psychology is widely used in marketing to entice potential buyers and to inspire brand confidence. Consumer studies indicate visual appearance and color are determining factors for more than 85% of product purchases according to data from Secretariat of the Seoul International Color Expo 2004. Despite 35% of Americans selecting blue as their favorite hue according to Kathy Lamancusa’s “Emotional Reactions to Color” study, effect-based black and white color’s associations appear to resonate more with buyers seeking similar attributes in their new car. The preference for effects in the white and black color space is even greater in the luxury car market according to Axalta’s 2015 Global Automotive Color Popularity Report. Pearlescent micas and aluminum pigments produce luster and brilliance to create a vibrant depth in both liquid and powder coatings. Pearlescent white micas add a soft, silky richness that creates a natural and soft impression in coatings. When used effectively, pearlescent micas in a variety of hues and particle size fractions can produce eye-catching results that draw attention without overwhelming a finish. Aluminum pigments can produce subtle shifts in brightness or dazzling brilliant sparkles depending upon the flake morphology and particle size. The reflective silver glow of aluminum pigments elicits a sense of timeless style. Aluminum pigments and pearlescent micas create the illusion of spatial depth that differentiates the coating from non-effect pigmented offerings. Effect pigment selections are tailor made to create warmth, add energy, produce eye-catching impact or subtly draw positive attention. Effect pigments provide a simple solution to broaden the appeal and enhance the color message specific to the powder coating’s end use.
Original Source: Paint & Coatings Industry, 3Oct-2017. (Website: http://www.pcimag.com), Copyright BNP Media 2017.
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