Four requirements for printing inks in the gravure

2022-08-13
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Carton intaglio pre printing process has four requirements for printing ink

with the development of China's economy, some well-known brand products have risen one after another, especially in the beer, dairy products and beverage industries. Their products are sold all over the country, Even exported overseas, in order to meet the logistics requirements, these enterprises have an increasing demand for high-quality cartons. At present, China has signed 11 regional trade arrangements and agreements with relevant countries and regions, which can greatly improve the quality of cartons and the efficiency of carton production. Therefore, in recent years, many carton manufacturing enterprises have paid too much attention to the scale

1. The ink is required to have good printability

as manufacturers have higher and higher requirements for the advertising function of cartons, the carton pattern design is becoming more and more exquisite, so a large number of eye tones, chromatic, large field printing are used. Some patterns have been refined to a light transition of 5%. For the field layout, it is required to have full and bright colors and even ink. At present, oil-based intaglio ink is widely used in China's market. However, the performance of water-based intaglio ink in terms of printability is not good enough. It is also difficult to meet the requirements of carton customers

2. Ink is required to meet environmental protection requirements

although China still uses a large number of oily intaglio inks with low environmental protection coefficient in carton preprint, alcohol soluble and benzene free inks that meet environmental protection requirements have gradually become the mainstream. Major printing plants and ink manufacturers have also made beneficial exploration for the promotion of water-based inks. In addition to the environmental protection requirements of solvents, strict requirements are also put forward for the content of heavy metals, toxic substances and carcinogens in inks. For example, the content of heavy metals in the dry film of inks is limited. The international customary standards include EN-71 of the European Union and ASTM FA of the United States The ink is required to have heat resistance and friction resistance

the length of the compaction and drying channel of the corrugated board production line is 2O ~ 100m, and the drying temperature is 17O ~ 200 C. It takes about 10 seconds for the printing surface to drag oom under high pressure and high temperature. This requires that the ink and varnish must have excellent heat resistance and abrasion resistance. If the resin selected by the ink and varnish is not heat-resistant and abrasion resistant, it will become soft, sticky or the ink will change color and flower, which will lead to waste products

4. The ink layer is required to have an appropriate surface friction coefficient

the inspection method of the carton manufacturer is: place the carton filled with products horizontally on a movable board first, and then increase the end of the board at a certain linear speed. When the angle between the fixed end and the standard end of GB 31604.2 is less than or equal to 24, the carton cannot slide. When the angle of the fixed end is greater than or equal to 30, the carton must slide. When the angle of the fixed end is greater than or equal to 24, The interval less than 3O can be sliding or static. It is not difficult to only require the ink layer to be wear-resistant. This can be achieved by adding many wear-resistant additives to the ink. But it is quite difficult for the ink manufacturing industry to require the surface of the carton to have a suitable friction coefficient

all kinds of equipment, ink and varnish required for intaglio pre printing of cartons have been localized. Demi ink Chemical Co., Ltd. is looking forward to cooperating with more carton manufacturers to expand and strengthen the carton preprint market and achieve win-win results

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