INNOVATION | DECORATION AND INTERACTIVITY
Pad printing makes advances
Up to now, pad printing has only been able to display different levels of brightness and colour gradients at great expense and usually with unstable results. However, it was possible to simulate this process with the aid of print screens. Tampoprint says that, thanks to its development of laser-struc- turable clichés such as its Intaglio cliché, and the development of 3D microstruc- turing using its Cliché Laser Xi, colour and brightness gradients as well as four-colour prints can now be created with impressive quality. In addition, this processing method can be used to create filigree lines and screened elements with contour lines, as well as a depth of individual image elements, or the combination of line and screen engravings.
The Intaglio cliché was designed for optimum direct imaging with the Cliché Laser Xi. Made from material that reacts highly sensitively to laser radiation, it has good mechanical resistance, a long service life and reproducible results. The new cliché is based on a thin steel plate. This is covered with an adhesive layer, a carrier material and a final coating specially developed by Tampoprint. “Thanks to its fully digital imaging capability using laser technology, this new type of printing plate could replace conventional imaging processes,” says the company. For example, it could replace previously used polymer clichés. It requires neither a repro film nor an exposure or any other steps that would be
just for system integration, but to have the mould- making and automation design teams meeting face-to-face and working closely together to tackle specialty technical challenges; along with having turnkey project responsibility.” Travaglini says StackTeck will continue to build IML moulds working with leading IML robot companies. “However now if the customer is looking for a single source built in North America, we have a solution to offer.” In-mould labels are often used to help reduce weight in packaging, as they become an integral part of tubs and lids. But that is not always the case. IML label maker Viappiani was recently involved in a project for a peelable IML label on an ice cream tub to improve recyclability. “The idea was to sell the ice cream in a quite sturdy plastic tub,” says Stefano Di Gregorio, Technical & Business Devel- opment Manager. “On the tub and on the lid, we have an IML label which can be removed by the end user once the product
IMAGE: VIAPPIANI
Left: IML labels on this ice-cream tub and lid can be
peeled off 22 INJECTION WORLD | October 2020
necessary in conventional cliché production. The workflow also shows the advantage of cliché production using direct laser engraving. Until now, the production of conventional clichés required at least eight work steps. The direct laser engraving now reduces the workflow to four work steps. A striking feature of laser technol- ogy is the particularly high resolution, Tampoprint says: motifs can be produced with up to 5,080 dpi or 150 lines/cm. This ensures high detail reproduction and realisation of finest structures and fonts in the subsequent printing process. Even individual halftone dots can be varied in width and depth and achieve a homogene- ous and detailed print result later.
has been consumed. The tub and the lid without the labels are quite sturdy and good looking, like a tub for the fridge you can buy in a shop.” Di Gregorio says the IML label is made of a special polymer (he will only say that it is not PP) which is removable even on the injection point. “The label carries a special adhesion voider in two corners on the back in order for allowing the label not to adhere at all in the corners,” he says. This allows the consumer to pull the label away. “This way we turned a single-use packaging into a multi-use container,” he says. “A very practical and green idea.” The label has already been used by one Italian ice-cream company.
CLICK ON THE LINKS FOR MORE INFORMATION:
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www.arburg.com �
www.tactotek.com �
www.proell-inks.com �
www.leonhard-kurz.com �
www.engelglobal.com �
www.hennecke.com �
www.digimarc.com �
www.brinkbv.com �
www.verstraete-iml.com �
https://stackteck.com �
www.bmb-spa.com �
https://trexel.com �
www.viappiani.com �
www.tampoprint.de
www.injectionworld.com
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