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New coatings for container glass

New developments in protection and decoration of bottles...In the retail world today the consumer is surrounded by thousands of products and brands from which to choose and finally purchase.

On most occasions there is only a matter of seconds in which to attract the consumer to purchase. In those initial moments, when first impressions are everything, it is arguably the product packaging which stimulates the mind to make the purchase. The right packaging has the power to motivate the purchasing decision.

The colour of glass now becomes the major component, in the quest for that sought-after 'point of difference' on the shelf.

Revolutionizing Bottles.

Modern coatings deliver outstanding lubricity, scratch resistance and label adhesion to the bottle surface. Latest achievement in coating technology now offers the opportunity to extend shelf life and preserve product quality by protecting the contents against harmful Ultra Violet Rays.

Extensive Research and Development programs conducted have resulted in the formulation of coatings that have the ability to 'block out' the damaging wavelengths that causes product deterioration. The opportunity now exists to improve long term quality and product life of white wine, champagne, olive oil and other food and beverage products that are affected by UV.

Innovative

A limited-edition luminous bottle produced by Rexam is the innovative solution to catching the eye of whisky drinkers in France. Clan Campbell is now available in a limited edition black coated clear bottle with a uv-reactive label, which glows when placed in a subdued-lit area.

Inside the product remains the same but Rexam is hoping the new bottle design will prove to be the obvious choice for drinkers.The bottle is now spray coated and then labeled with the luminous moon and mountain logo to entice customers whilst at the bar.

  
Images: Courtesy - Rexam

Polymer coating technology

Through an R & D partnership Wiegand Glas developed a coating process for glass containers. The glass container is coated with a 0.005 mm thin polymer and its internal pressure strength is therefore increased by 50 %. Furthermore, with this coating, it is also possible to reduce the bottle weight by up to 30 %. By colouring the polymer, they were able to produce the bottles in the colour and colour nuances customers want. Also frosted effects can now be accomplished economically and in an environmentally conscious way.


Image: Courtesy Wiegand Glas

New Trends for Returnables

Camouflage coating and Anti-Scuff coatings helped to revolutionize the returnable glass bottle market. They restore the luster and shelf appeal of worn bottles, while others help prevent or delay scuffing of the bottle surface. Both coatings can more than double the lifetime of a returnable bottle depending upon the criteria for discarding bottles.

Virtual Reality : Acid-Etch Containers with Glass Enamels

The imitation of hydrofluoric (HF) acid-etch effects for glass containers has been an enormous challenge for many years. Whilst it has been possible to simulate the frost-like appearance with a variety of coatings, it has not been possible to copy the total combination of smooth texture, quality feel and appearance, and durability that is typified by the "real thing".

Today, the environmental pressures and consequently the costs of producing HF-acid etched bottles are increasing hugely. The acid etching process itself also has a tendency to weaken the bottles, which can lead to increased breakage and higher costs for the bottle producers.

For these reasons, the Glass Industry is continuing its search for a viable alternative, which can perform not only for cosmetic and perfume bottles but also for wines and spirits bottles and glass tumblers.

The beverage bottle market is especially interested to replace the traditional HF-etch effects with glass enamel coatings, in view of the higher mechanical resistance demanded by this segment, necessary to survive both transportation and the filling lines.

There are now smooth feel, lead-free glass enamel available, delivering a smooth texture and appearance that is indistinguishable from the real thing, with enhanced abrasion resistance compared to organic coatings. These are applied by wet electrostatic technology which is an ideal method of application because this process can deliver:

* Increased transfer efficiencies, up-to 90%
* Reduced waste
* Energy efficient
* Low maintenance cost
* Homogenous deposit
* Flexibility - different article shapes can be handled by simple modification of the chuck design
* Can be used for glass stemware, vases, tumblers, food jars, cosmetic and beverage bottles
* Fast color changeover
* Closed loop conveyor system
* Optimum cost effectiveness, compared to real HF-etch coating
* Optimal environmental-friendliness compared to real HF-etching
* Relative low cost investment

The future

The market potential is huge. Today, millions of vodka, cognac, water and wine bottles are waiting to be decorated with such imitation acid etch glass enamels. More and more leading glass bottle producers and premium drinks brands around the globe use coating methods to add value to their products.

Modern new coatings are cost-effective, and used in combination with efficient application techniques - either wet or dry - offer an environmental-friendly, low cost substitute for traditional HF acid etching.


Source: OGIS GmbH, www.glassglobal.com (The foregoing information was compiled from publicly available information in reports and news releases)

 
 

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