In our last Viscometer Series blog, we reviewed some of the most common printing applications and why viscometers are so important to their success. In this article, we’ll be going over another area of applications where viscosity control is key: coating.
As with printing applications, if you’re not measuring and monitoring viscosity in your coating application, you will inevitably run into any number of preventable issues. These four common coating applications are no exception:
- Food and beverage can coating
- Wood furniture coating
- Silicone needle coating
- Gelatin capsule coating
If you’re working with one of these coating applications, and you’re not keeping track of your viscosity using a viscometer (typically as part of a complete viscosity control solution), we recommend updating your processes as soon as possible.
Food and beverage can coating
Metal food and beverage cans are given both exterior coatings and interior coatings. While the exterior coatings are important for branding purposes (and require consistent viscosity to ensure image quality and proper coloring), the interior of the can is possibly more important. Uncontrolled viscosity can lead to an improper interior coating — too much, and it can interfere with the taste of the food or beverage inside; too little, and the can itself may corrode or dangerous metals may leach into the inside of the container. Therefore, regular monitoring of viscosity using an appropriate viscometer is key.
Wood furniture coating
Wood furniture — cabinets, tables, chairs, beds, paneling, flooring, etc. — and furniture that includes wood in its composition often requires some type of coating, whether protective or decorative (or both). If viscosity is left unmonitored, the wood coatings may give way to problems such as blistering, cracking, roughness, orange peel, and cloudiness.
Silicone needle coating
Silicone needles are used in healthcare settings for medicine delivery and blood drawing. To enhance tissue penetration and reduce tissue drag during usage, the needles are given a special coating. If viscosity is not regularly measured using the proper viscometer, the resulting needle coating may not be as smooth as required, creating the potential for tissue damage during usage.
Gelatin capsule coating
While branding is important to drug manufacturers, pharmaceutical-grade gelatin capsule coatings are more than aesthetic. Coatings on oral medications protect against premature dissolution or disintegration of the capsule. Without this special type of coating, the medicine may get released in the wrong part of the body — greatly reducing or even negating its effectiveness. If viscosity is too low in the coating solution, disintegration protection for the medicine will be put at risk; if viscosity is too high, the capsules may suffer from appearance issues. Therefore, usage of viscometers is key to pharmaceutical applications.
If you have questions about what type of viscometer is best for your application, contact Saint Clair Systems.