Toluene free printing of the hottest gravure print

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Toluene Free gravure printing ink (Part 1)

1 Preface

gravure printing ink takes giving packaging aesthetic feeling and function as its mission, and the substrate is mainly paper and plastic film. However, at present, the safety and hygiene requirements for food packaging are extremely strict, and specific measures need to be taken

in the past, in the gravure printing industry, which uses a lot of organic solvents, necessary countermeasures have been taken for the formulation of hydrocarbon compounds, the prevention of odor pollution and emission, the improvement of working environment and other labor safety and health issues, the treatment of dangerous substances and the fire protection law of relevant equipment. Previous countermeasures have achieved the practicality of Toluene Free gravure printing ink, especially the water-based gravure printing ink is gradually becoming practical in the field of film gravure printing

this paper introduces the main points and current situation of toluene free of special gravure inks used in food packaging

2. Changes in the use environment of gravure printing inks

2.1 export volume of printing inks

in 2000, the total shipment volume of printing inks in Japan was about 498000 tons. In terms of types, lithographic inks were 15 The problem of the experimental trip is 90000 tons, accounting for 31.9% of the total, accounting for the largest proportion; Special gravure printing ink "is about 136000 tons, accounting for 27.3%, ranking second. Compared with emerging countries, the proportion of exports will also be greatly increased. For 1991, special gravure inks increased by 16% in the past 10 years, slightly lower than the 21% growth rate of all inks, but the shipment volume accounts for a large proportion of the total

2.2 composition of gravure inks

general gravure inks are composed of pigments, resins, solvents and additives, and solvents account for about half of the total amount of inks. When printing, the ink concentration needs to be reduced, that is, the solvent can be used. The current situation is that these solvents volatilize during the printing process, some of them are recycled, and most of them are discharged into the atmosphere. Therefore, it is necessary to consider the impact of gravure ink solvent on the working environment, the pollution to the atmosphere and the earth's environment, and the negative impact on safety and health

2.3 gravure printing ink and related regulations

for the gravure printing industry that uses a lot of organic solvents, it is required to solve the following problems:

① the emission of organic solvents and the prevention of air pollution:

② the improvement of the working environment and the safety and health of food packaging materials

③ fire protection law issues related to the use of dangerous goods

Table 1 shows the relevant regulations on gravure printing industry in Japan. In the past, gravure printing industry accelerated the utilization of magnesium alloy and rare earth magnesium (aluminum) alloy in the fields of automobile dashboard and seat frame, steering wheel core, wheel hub and so on, which was pointed out by the poor improvement of the working environment. According to the labor safety and health law of 1995, with the control concentration standard of toluene increased from 100ppm to 50ppm, printing companies that took corresponding environmental protection measures increased. In addition, through the implementation of the product law (PL law), the safety of printed matter has attracted wide attention, and more food manufacturers have formulated corresponding control standards in terms of residual solvent in food packaging bags. In particular, toluene is easy to remain on polyolefin (OPP), a fast food packaging material. End users have put forward strict requirements to control the residue below 1 mg/m2

review of the trend of Japan's food industry and gravure printing industry:

the toluene residues detected in cakes and their packaging bags imported from overseas in December 1993 were 230ppm and 70ppm respectively, and they were recycled. The toluene residue detected in cakes produced in Japan was ppm

in January, 1994, the Japanese pastry Association issued a circular on the thorough management of the quality of printed products

in September 1995, the gravure printing industry Federation of Japan issued a proposal to "promote benzene free"

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