scholarly journals Powder Coating for Healthcare Aluminum Packaging

Cosmetics ◽  
2020 ◽  
Vol 7 (2) ◽  
pp. 20
Author(s):  
Stefano Rossi ◽  
Massimo Calovi ◽  
Matteo Tonelli
Keyword(s):  
Dimethyl Ether ◽  
Chemical Resistance ◽  
Powder Coating ◽  
Visual Observation ◽  
Pharmaceutical Product ◽  
Powder Coatings ◽  
Product Packaging ◽  
Alcohol Water ◽  
Protective System ◽  
Aluminum Cans

Restrictive regulations concerning the toxicity of certain compounds and the use and disposal of solvents present in the liquid epoxy protection system have been analyzed in this work to evaluate powder coatings as an alternative in the protection of aerosol aluminum cans, which are employed in cosmetics and pharmaceutical product packaging. In this paper, the chemical resistance of polyester and mixed epoxy-polyester powder coatings is assessed, considering different aggressive environments employed in healthcare commercial products. The samples’ performances are also compared with the currently used liquid organic coatings. The pack test has been used to evaluate the protective system behavior in contact with both the liquid and the gaseous part of the cosmetic product. However, the visual observation, required by the test, enabled the highlight of only very evident degradation phenomena. The chemical resistance of the powder coatings has proved to be appropriate only for less aggressive environment, where the critical compounds are propellants, propane, butane and isobutane. When exposed to other environments containing alcohol, water and dimethyl ether, most samples have been susceptible to layer degradation phenomena. Polyester layers lose their corrosion protection properties. Epoxy systems, instead, result more performant than polyester resins, but they particularly suffer from the contact with dimethyl ether.

scholarly journals Anhydride-Cured Epoxy Powder Coatings from Natural-Origin Resins, Hardeners, and Fillers

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 531
Author(s):  
Szymon Kugler ◽  
Paula Ossowicz-Rupniewska ◽  
Ewa Wierzbicka ◽  
Jakub Łopiński
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Chemical Resistance ◽  
Powder Coating ◽  
Market Force ◽  
Cross Linking ◽  
Powder Coatings ◽  
Natural Origin ◽  
Market Needs ◽  
Steel Substrates

Carbon-neutral policy and technological race on the powder coatings market force to develop more advanced, safer, cheaper, and naturally sourced products. To meet the market needs, powder coating compositions and coatings were prepared from safe and natural-origin hardeners, resins, and fillers prepared from rosin, bio-diols, bio-epichlorohydrin, and halloysite, to investigate their thermal, mechanical, and functional properties in comparison with petroleum-based references: cross-linking behavior, glass transition temperature, thermal stability, hardness, cupping resistance, adhesion, chemical resistance, gloss, color, and anti-corrosive behavior in salt chamber. As a result, compositions containing up to 83 wt.% of natural resources, and showing comparable or better properties, as compared to references, were successfully prepared. Their application includes binders for future ecological powder paints for demanding protection of steel substrates.

scholarly journals EFFICIENCY OF MODIFYING ADDITIVES IN POWDER COATING MATERIALS

2021 ◽  
pp. 47-57
Author(s):  
V.І. Gots ◽  
◽  
О.V. Lastivka ◽  
О.О. Tomin ◽  
◽  
...  
Keyword(s):  
Surface Tension ◽  
Silicon Dioxide ◽  
Mechanical Characteristics ◽  
Powder Coating ◽  
Coating Film ◽  
Powder Coatings ◽  
High Effectiveness ◽  
Modifying Additives ◽  
Polymer Resin ◽  
Technical Specifications

Rapid rates of development in production of powder coatings are, in comparison to liquid paint-and-lacquer materials, evidence of their importance, high effectiveness and prospectivity. The increase in popularity of powder coatings can be explained by their environmental adequacy and attractiveness from the perspective of the environmental protection as well as high effectiveness related to the possibility of obtaining high quality protective and decorative coatings during the one-layer application. At the same time, it is obvious that during modern powder coating-and-lacquer materials have not exhausted all possibilities of improving pharmaceutical compositions and expanding the assortment as well as modernizing their production technology the relatively short period of their development. The composition of the thermosetting powder coating contains five key components: polymer resin, hardener, pigments, fillers and functional additives. In general, the polymer resin and hardener play a key role in ensuring necessary mechanical characteristics and lifespan of the powder coating. In this case, the role of functional (modifying) additives is extremely important to obtain characteristics that are often fundamentally required to meet predetermined technical specifications of the products and needs of end users. Additives play an important role in forming properties of powder coatings and coatings based on them as they have become their integral part for several main reasons: because of control of rheological properties, surface defects as well as light and temperature stabilization of coatings. The study deals influence of modifying additives on properties of the powder coating. The authors using rheological and degassing modifying additives with different nature of the main active substance. It was found that the additives based on the acrylate polymer adsorbed on the silicon dioxide in the form of Byk-3900P and on the polyoxyethylene derivative of the castor oil in the form of Luvotix R400 decreasing the surface tension in the coating film, which, in its turn, contributes to the increase in the wettability of base during the melting of the powder coating, decrease the ‘orange peel’ effect during the cross-linking, reduction in pinholes on the obtained surface and improvement of mechanical characteristics of the coating. At the same time, rheological additives based on the bentonite in the form of Luvogel 4B and on the hydrophilic silicon dioxide in the form of Cab-o-sil M5 cause the increase in the surface tension in the coating film, which, in its turn, leads to the worsening of flow, appearance and mechanical characteristics of the powder coating.

Study of rheological behaviours of electrostatic thermoset powder coatings

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Morteza Ehsani ◽  
Ali Akbar Yousefi ◽  
Saeed Samiei Yeganeh
Keyword(s):  
Mechanical Properties ◽  
Dynamic Viscosity ◽  
Physical And Mechanical Properties ◽  
Powder Coating ◽  
Curing Temperature ◽  
Design Parameters ◽  
Powder Coatings ◽  
Gel Time ◽  
Rheological Measurements ◽  
The Impact

AbstractThe use of dynamic viscosity/time (temperature) cure curves is seen as a powerful technique to quantify formulation and resin design parameters. The behaviour of different thermoset powder coating systems, epoxy/polyester (50/50, 40/60 and 30/70) as well as the impact of the filler, the curing temperature and the frequency upon gel-time have been examined based upon the rheological measurements and compared with PE/TGIC systems. Two disparate methodologies have been utilized to determine gel-time. The behaviour of dissimilar systems bearing different formulations has been compared by means of the non-isothermal DSC test. The effects of resin percentage and the formulation on physical and mechanical properties of coating have been studied.

Time and cost effective methods for testing chemical resistance of aluminium metallic pigmented powder coatings

2008 ◽  
Vol 63 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Jostein Mårdalen ◽  
John Erik Lein ◽  
Helene Bolm ◽  
Merete Hallenstvet ◽  
Volker Rekowski
Keyword(s):  
Chemical Resistance ◽  
Cost Effective ◽  
Powder Coatings

Influence of cathodic polarization on the properties of epoxy powder coatings

2019 ◽  
Vol 24 (4) ◽  
pp. 7-14
Author(s):  
D.N. Zapevalov ◽  
A.Р. Sazonov ◽  
E.V. Sheverdenkin ◽  
A.V. Latyshev ◽  
N.I. Savostina ◽  
...  
Keyword(s):  
Mechanical Load ◽  
Large Diameter ◽  
Powder Coating ◽  
Operational Reliability ◽  
Powder Coatings ◽  
Active Centers ◽  
Cathode Polarization ◽  
Epoxy Coatings ◽  
Large Diameter Pipes ◽  
The Impact

The article discusses the effect of cathode polarization on the protective properties of powder epoxy coatings, assesses their operational reliability, statistics of failures and describes the problems found during their operation. In the process of applying commercially available pipes with epoxy powder coating on the existing gas pipeline, a not previously manifested defect was observed - the formation of dome-shaped swellings. This led to some restrictions on the use of epoxy powder coatings. With the advent of a new generation of epoxy materials, as well as in connection with the revision of the regulatory documentation GOST R 51164-98, the issue of removing these restrictions on their use for insulating large diameter pipes (up to 1,420 mm). Without additional protection has become topical. As a result, it became necessary to estimate the probability of the appearance of defects of this type when using modern powder coatings. We carried out laboratory studies of the effect of cathode polarization on the properties of modern two-layer epoxy coatings after exposure to them of shock loads of a certain size. The results indicate that the impact of such a mechanical load may cause the appearance of microdefects of the coating, which are not determined by the existing methods of control. Due to the penetration of electrolyte under the coating and the occurrence of certain physicochemical and electrochemical processes that are enhanced by imposing the potential of cathodic protection and increasing the operating temperature, these microdamages can serve as active centers for the formation of a cupola-shaped swelling.

Wear tests of modified powder coatings at low climatic temperatures

2021 ◽  
pp. 442-446
Author(s):  
N.F. Struchkov ◽  
D.I. Lebedev ◽  
K.N. Bol’shev ◽  
G.G. Vinokurov
Keyword(s):  
Friction Surface ◽  
Sliding Friction ◽  
Powder Coating ◽  
Powder Coatings ◽  
Ambient Temperatures ◽  
Special Stand ◽  
Wear Tests

The results of comparative wear tests for sliding friction of modified powder coatings with metal counterbodies at room and low climatic temperatures are presented. For this, a special stand has been developed and manufactured for testing the wear of powder coatings in conditions of low climatic ambient temperatures. The temperature of the friction pairs "powder coating — metal counterbody" and the profiles of the friction surface of coatings and counterbodies were measured.

scholarly journals Characterization of Surface Coating Techniques for Improved Performance

2020 ◽  
Vol 5 (9) ◽  
pp. 5-9
Keyword(s):  
Surface Coating ◽  
Research Work ◽  
Hardness Test ◽  
Powder Coating ◽  
Load Force ◽  
Wood Block ◽  
Powder Coatings ◽  
Coating Technology ◽  
Scratch Hardness ◽  
Coated Materials

Surface coating has evolved with time, tracking the demands of the processing industry. This research activity, studies the significance of powder coatings in the evolution of existing conventional surface coating technology for their practical applications in the field of metal coating, particularly office and home appliances. The first objective of this work involves a systematic comparison between polymer powder coatings with liquid-based coatings. In the second objective, a comparison between the polymer coatings with additive filled powder coating was performed. Various conventional substrates (such as copper, aluminium, galvanized iron, brass, cement plank, wood block) were used for this study. The materials were first dry scuffed and then dipped in 3 in 1 chemical (zinc phosphate chemical and magnesium phosphate) for the primer coat. The prepared substrates were surface coated with liquid paint (on one side of the panel) using spray gun and powder paint (on another side of panel) using electrostatic spraying. The coated panels are then subjected to various standard (ISO) characterization techniques such as Scratch hardness test, Flexibility test, Thickness test, Adhesion test, Impact resistance test etc to analyze the effectiveness of the coatings applied. The quantitative and qualitative results thus obtained using powder coatings were promising (e.g: As the load progressively kept increasing i.e. 1000-2000 gm, mild scratches were noticeable on liquid coated substrates whereas powder coated metal panels have shown a greater resistance to scratch damage) as the test values determined high strength quality and durability (in-line with the standards) in comparison with liquid coatings. Also, the doping of additive (graphene) in small quantity has improved characteristics and qualities of the powder coated materials (e.g: graphene based powder coating has endured scratch hardness test beyond 2500 gms load force compared to simple powder coating). The findings of the current research study has confirmed the advantage of the powder coating technology and also deliberated the effect of fine powder flow ability. The important future prospects of this research work is that., powder coatings will stand on the threshold of exciting breakthroughs thus opening new frontiers by being able to coat thick steel components and even non-metal substrates. Also, the recent advances in powder coating technology with anticorrosive additives will result in bonded metallic coatings that deliver a unique, quality appearance.

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