Although a growing number of cigarette package printing enterprise begin to pay close attention to water-based ink, water-based ink application in the cigarette packet gravure has some improvement, but the current water-based ink is mainly used in the printing quality is not high on low-grade cigarette package, application in high-grade cigarette package is not optimistic, and there are still a lot of cigarette package printing enterprise in water-based ink.So what exactly is the problem in tobacco package limited water-based gravure printing ink application?
Problem a: ink performance is still insufficient
Overall, some properties of water-based ink temporarily cannot rival solvent-based inks, the printing effect and also exists certain gaps when compared with solvent ink, it is lead to cigarette package printing enterprise to do not have a high level of water-based ink to accept one of the main reasons.
First is dry, water-based ink with water as the main solvent, and the latent heat of evaporation of water, at room temperature volatilizes slower, so its flow property, adhesion, gloss is a solvent ink is less, easy to produce printing quality problem;Followed by solubility, water-based ink solubility depends on the solubility and dry between emulsion and paste with good or bad, in production requires constant stirring, and different brands of water-based ink, its safe storage period, more than safe storage period of water-based ink is easy to produce precipitation or stratification, even mixing is not too big effect, at this time there will be inevitable knife line fault, even more serious.
In addition, the current standard has some flaws, not enough attention and insufficient knowledge of water-based ink in some performance.In GB/T26395-2011 "standard of gravure ink, water-based tobacco package, for example, part of the standard of water-based gravure ink expression can still see the shadow of the alcohol water-based gravure ink, and not to ban list outside but must add additive substance has a definite limited addition, away from the real water soluble or water-based ink standard is still some distance.If the new standards of organic solvent can be banned limit to access system, namely material shall use rules, for the application of water-based ink in cigarette packet gravure plays a big role.
Problem two: need to adjust the production process
In cigarette packet gravure, if change the original use of solvent-based inks to water-based ink, must also be in several aspects, such as process parameters, equipment structure adjustment and improvement, otherwise will influence the printing effect.This not only need to ink materials production enterprises and actively cooperate with supplier, specification and skills to the operation of the operating personnel also have higher requirements.
For example, as a result of water-based resin used in water-based ink drying is irreversible, if still adopts traditional pour "diamond" shape mesh point of carving gravure, longer duration of use, dry solid ink at the bottom of the net hole will cause plugging, resulting in lack of ink transfer, thus influence the consistency of printing color.To this, on the one hand, it is necessary to convert the square mesh point laser carving gravure;Requirements, on the other hand, operators must be timely and thorough cleaning gravure, or drying after the whole version of the roll will be scrapped.
In addition, in order to make up for the inadequacy of water-based ink in a dry sex, also need to transform existing gravure press drying device, or increase the dry power of the drying device, or without altering the gravure press drying power, by changing the air volume, wind speed of drying device to improve the drying capacity.
Question 3: cost concerns
With the development of the tobacco industry to the activities of the tobacco companies began to strictly control the cigarette package cost, making tobacco package prices fall sharply, even led to a price trend.At the same time, raw material and energy prices are rising, labor costs continue to rise, makes the cigarette package printing enterprise profits continuously diluted, cigarette package printing enterprise in terms of cost considerations and therefore extremely sensitive and careful.
In the context of the current situation, cigarette packet gravure using water-based ink is higher than the cost of using solvent ink.On the one hand, water-based ink water-based resin as the link, the purchase price is much higher than ordinary solvents;On the other hand, in order to adapt to the water-based ink printing characteristics, energy consumption in production, equipment modification, etc also need to do some more or less capital investment.Therefore, for those who are not involved in the field of water-based ink cigarette package printing enterprise, to some extent, this will increase their concerns.
(Gold Printing Group) |
