Cork Tech Talk Blog

FDA Banned Three Perfluoroalkyl Ethyl Containing Chemicals

The U. S. Food & Drug Administration (FDA) has banned three specific perfluoroalkyl ethyl containing chemicals because of toxicity concerns. The chemicals have been used to make paper and paperboard packaging resistant to oil and water for use in contact with aqueous and fatty foods. Affected is 21 CFR Part 176 with §176.170 amended, effective January 4, 2016.

Read more: FDA Bans Chemicals in Food Packaging Coatings

Special Packaging and Labeling Create a Selling Advantage 

Brand marketers have long sought to differentiate their products from competition to create a selling advantage. Packaging and labeling have often been the vehicles, used by designers, to make a notable difference promoting eye, and shelf appeal to stimulate product sales. Aesthetic shapes, graphics, and special visual effects have led the way.

Read more: Creating Dazzling Cast & Cure® Finishes

Setting & Drying Inks

It’s all about the setting and drying of conventional sheet fed offset inks. Anti-set-off spray powder is used to prevent set-off, the unwanted transfer of wet ink to an adjacent sheet, in a press end pile. Spray powder not only provides a physical spacing between sheets of substrate, but also allows the circulation of oxygen containing air necessary to the drying (oxidation) of inks. Sheetfed offset lithography is a printing process that feeds sheeted substrate into the press one sheet at a time for printing. After printing the sheets are stacked in the press end delivery section one sheet upon another in a pile.

Read more: 5 Spray Powder Usage Concerns

Cork Industries Formulates Benzophenone Free UV Coatings

Benzo Free Expert Help (610) 522-9550Photoinitiators (PIs) are a key component and a cost driver for UV curing products. They are capable, as their name implies, of initiating or starting a photoreaction. This occurs when a PI absorbs radiation energy from light exposure to produce highly reactive free radicals and ionic species. These have the capability of catalyzing or starting chemical reactions, or changes in certain formulated materials. One such photoinitiator is Benzophenone.

Benzophenone (BP) or Benzo, has been generally recognized as the most used PI globally. It is known for its effectiveness as an initiator, and its relative low cost.

In the last several years, a health concern has developed, especially in Europe, regarding the migration of small molecule PIs, into foods from indirect food contact packaging materials. It is thought that a PI like methyl benzophenone (MPB) can reach packaged food in two ways, (1) an indirect transfer from the vapor phase of semi-volatile PIs, (2) from direct contact stemming from permeation or set-off when cured printing inks and coatings come in contact with the inside of a package surface as packaging material is stacked or processed in roll form. When migration into food has been found, the packaged food and the packaging materials used have been removed from use.

Read more: Benzophenone Free UV Coatings and California Proposition 65

Hard Plastic to Soft-Touch Plastic

Before soft touch finishes we had to live with hard surfaced materials that were converted into products designed for our use. Think about it! Metals, stone, glass and wood are hard surfaced materials. Most plastic materials are hard surfaced materials, especially those that are used for non-disposable products manufacture. There has been exponential growth in the use of plastics recently due to the attractiveness of light weight, low cost and durability. Plastic materials have found a tremendously wide range of applications because of these positive attributes. Plastic materials also have a negative side in that they tend to yellow after long term weathering, and are subject to scratching and chemical attack.

Read more: Soft Touch Print Coatings Deliver Perception of Quality

EB Curing Flexible Packaging Breakthough

Evolving EB technology applied to flexo and offset CI presses are competing to be a major factor in the future of flexible packaging. Electron beam technology is widely used in a variety of industrial applications, including wide web offset printing/coating, food preservation, food packaging & medical products sterilization, polymerization, transformation and cross-linking of plastic films, cross-linking of wire/cable insulations, welding, and the evaporating of metals.

What is EB Curing?

  EB curing is a process wherein electrons are generated in a closed environment so as to impact specially formulated inks and coatings causing cross linking (polymerization).

Read more: Electron Beam Flexible Packaging

Demands for Food Packaging

With the global customer base for retailed food increasing, food packaging must more and more conform to international food quality, and safety standards. This also can mean longer shelf life is a necessity. Increased global consumer awareness, income, combined with busier lifestyles, is creating a growing demand for convenience foods. Consumers typically want the food they buy to be safe to eat, stay fresh longer, and meet their taste, and appearance preferences. Essential to this end is food packaging that can extend shelf life, and maintain food freshness. Simply stated, consumers want protective economic food packaging that offers easy open, and see through features, combined with barrier protection from degrading oxygen, water vapor, and aromas.

Read more: Barrier Coatings for Food Packaging

We Are Custom Formulators

We are Custom Formulators.  We can custom tailor a solution for your coating needs, based on your requirements and equipment. 

We are a team of Chemists, Print Managers, and Coatings Experts. 

Let us help improve your finished product. Expert Help - Contact Us

About the Author

Elmer W. Griese Jr, having accumulated 35+ years of knowledge working in the coatings and printing ink industries has now authored the Cork Tech Talk News, newsletter since 1992 producing 112 issues. He remains dedicated to educating and illuminating technological progress that offers the potential to advance coating technology and its applications.

Dry Erase & Chalkboard UV Caotings

Cork Cast & Cure® Finishes

Green20 High Gloss

Multiwall Bag High Gloss

Cork Industries, We are Tomorrow's Innovation.