Cork Tech Talk Blog

Viscosity is a measure of a fluid’s resistance to flow. It describes the internal friction of a moving fluid due to its molecular makeup. A high viscosity (thick) fluid resists motion because of high internal friction, while a low viscosity (thin) fluid flows readily because of low internal friction.

Viscosity is measured because it is important to the successful application of coatings. Viscosity has a direct relationship to the amount of coating applied by coating equipment. Coatings are formulated to be applied at a particular viscosity in order to optimize final properties.

Read more: Why and How Viscosity is Measured

Superior folding cartons begin with the proper choice of substrate, paperboard with the performance and graphics quality to successfully market the packaged product. The wide variety of substrates available to the folding carton producer, make it easy to make the wrong choice.

Converters must carefully assess printability, packaged product protection, package design requirements, processability, and package value to appreciate the tradeoffs.

Folding cartons represent a form of paperboard packaging that is constructed from 10 to 36-point (thick) board. These board types consist of a wide range of virgin and/or recycled grades (SBS, FBB, SUS, CUK, CRB, UKB, etc.). These grades possess varying characteristics that make each right for specific packaging requirements.

Read more: Folding Carton Paperboard Choices

UV Ink as a component of the global printing ink market has been forecast to grow at a 15.7% CAGR between 2015-2020 to reach $3.5 billion in 2020. Currently the global market for UV coatings has a value of $3,430. million with a future forecast projecting sustained growth of 6.1% CAGR by 2026 or $ 6,187 million.
Figures courtesy Allied Research Markets & Future Markets Insights

upchartNew opportunities for growth continue to be identified, while there is increasing penetration of known and new markets with ever expanding new applications. There is now a greater than 40-year period of sustained growth.

Read more: UV Growth Continues Unabated

More and more printers and converters are responding to requests for paper and paperboard coatings that can replace petroleum based extrusion coated polyethylene (PE) or Poly Replacement. Alternative barrier coating products that are safe for the environment are in favor due to brand marketers, legislative, political and consumer pressure.

Read more: Poly (PE) Replacement Barrier Coatings and Test Methods

Aqueous coatings may be thermoplastic or thermoset, emulsion or solution polymer blends. The major volatile component is water along with small percentages of other volatile items. Some of these, such as ammonia or amine can evaporate and accumulate in the headspace of a sealed container, therefore opening is best done in a well ventilated area.

Read more: Aqueous Coatings: Storing, Handling & Using

Digital printing has advanced continually since its introduction in the 1970’s due to electrophotography and inkjet having been the beneficiaries of the majority of development money spent on printing technology. Great improvements have followed in speed, quality, reliability, and scalability leading to new applications.

Read more: Inkjet, The Engine behind Digital Printing Growth

Paper Substrates Forgive, Plastic Ones Do Not.

Much has happened since we last wrote about printing on plastic substrates. Compared to a few years ago, many more printers are printing on plastic substrates and the variety of available substrates has increased, as has interest in printing on these materials, the result of innovative new applications.

Read more: Printing on Plastic Substrates can be Tricky
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