Oxea at the 8th Speciality Films and Flexible Packaging Conference
Toluene is still widely used in India in the packaging print industry. As this chemical is now known to migrate from the packaging layer into the packaged goods and to potentially crusade damage to organs in humans, the employ of toluene has been banned in the food industries of many countries. Toluene is well-nigh to exist banned in India, also, and so the decision on how to substitute it in the packaging printing process will be business-critical for printers and converters.
Major ink manufacturers in India recommend Non-Toluene Not-Ketone (NTNK) as an culling for current toluene- or MEK-based blends. For the substitution, a conventional ethanol/ethyl acetate blend (and so-called 'Ethyls') may seem like an obvious selection. The German-based chemical visitor Oxea, however, points out that with a solvent arrangement based on north-propanol and due north-propyl acetate, called 'Propyls,' full press price tin can be significantly reduced, while being a straight replacement for Ethyls.
Potential solvent savings 30%, inks 20%
At the same fourth dimension, information technology is claimed that with the apply of Propyls, print quality is improved, and ink consumption is reduced while the press speed tin can be increased. The printing procedure becomes more stable and less waste is generated, contributing to college efficiency of the entire print run. Overall, industrial studies with major flexo and rotogravure printers take shown average savings potential of 30% for solvents and twenty% for printing inks. Other advantages such every bit reduced residual solvent content, reduced ink foaming in flexographic printing and the potential to avoid retarders such every bit ethoxy propanol take also been demonstrated in trials at packaging printers in India.
"Particularly in packaging printing, customers are demanding more sustainable press from providers. In film printing with flexography, Propyls can be swapped directly with conventional Ethyls, with no farther modifications. Printers can keep to use the same printing ink, the same equipment and the aforementioned substrate as before. With Propyls, printers utilise less ink and less solvent while also producing a lower percentage of scrap due to fewer car stops. As a result, resources are conserved, and emissions of volatile organic compounds (VOCs) are reduced. Overall, productivity increases while using the same mechanism as before," said Sebastian Anton, head of Business Development from Oxea.
"Propyls have been long favored in flexography printing in North America. In recent years, Propyls became increasingly popular in Cardinal and Due south America, as well as in Europe. With our new production capacity that has come on stream in 2018, at present Indian printers and converters tin can utilise the advantages of Propyls as well," he added.
Oxea has started to make Propyls bachelor in India through its Indian distributor Hazel Mercantile, and provides technical support from its local offices in Mumbai. Anton will also be speaking on toluene replacement and regulations at the 8 th Elite Specialty Films and Flexible Packaging Conference in Mumbai on 22 and 23 August 2019.
Technically, Propyls reduce the so-chosen plugging (drying out) of the cells on the printing cylinder. Equally a medium evaporating solvent, Propyls evaporate more slowly than Ethyls simply ensure that the ink dries reliably in the process. It ways that fewer refills post-dosing are required during the printing procedure, which leads to a significant reduction of solvent consumption and more often than not lower emissions of harmful substances, and then-chosen VOCs (volatile organic compounds). In a Propyls solvent system, the pigments of the press ink can distribute more homogeneously on the moving-picture show during awarding due to the slightly slower drying process. This results in a college ink density for the same corporeality of paint. In this fashion, the printer achieves the aforementioned impress quality with significantly less pigment, which saves expensive base ink. Also, improved emptying and selection-up characteristics of both the engraving cylinder and the anilox ensure optimum transfer of the press ink onto the substrate. Thank you to the slower evaporation rate of Propyls, it is possible to increment the speed of the press in many cases without compromising print quality. Finally, Propyls demonstrate less foam formation tendency than Ethyls, especially when it comes to warm and humid ambient weather atmospheric condition.
Source: https://packagingsouthasia.com/events/smart-choice-of-solvents-reduces-ink-consumption-and-lowers-total-costs/
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