Development Status and Trend of Intaglio Printing Film Market at Home and Abroad

1. Various ink characteristics

With the continuous improvement of the people’s living standards, in recent years, there has been rapid development in packaging and printing. The introduction of printing equipment, the improvement of plate making equipment, and the improvement of printing inks have brought out people’s excellence in print packaging bags. It also raised people's awareness of environmental protection. As the basic function of ink is to pass certain equipment to give people the information they need.

1) Classification of ink

In order to meet the needs of various printing methods and printing applications, there are many types of inks, and the physical and chemical properties are different. The performance varies greatly. Clear classification is a prerequisite for the use of good inks.

1 Classified by drying method. When the printing ink is transferred from the plate to the surface of the substrate, the ink will turn into a solid film. This is the drying of the ink. The drying of the ink has both physical and chemical effects.

a. Oxidation polymerization drying ink. The resin in the ink reacts with the oxygen in the air, causing the resin to cure and cross-link the resin to form a network structure and dry.

b. Penetration drying ink. The ink penetrates porous materials such as paper to dry.

c. Volatile drying ink. This type of ink contains a large amount of volatile solvents, after printing on the surface of the substrate, the solvent evaporates into the atmosphere. The remaining resin in the ink and the pigment together form a solid film layer and adhere to the surface of the substrate.

d. radiation drying ink. Radiative drying is the drying of the ink by the energy of the radiation, which causes the molecules of the ink vehicle to polymerize and change from a liquid to a solid. The main reason is that some substances in the ink absorb energy to generate free radicals, causing the unsaturated double bond reaction in the ink resin to cross-link and solidify.

e. Other dry inks. There are many kinds of other drying methods, such as wet coagulation drying, condensation drying, precipitation drying, two-component reaction drying, and gel drying.

2 classified by printing method

a. Lithographic printing ink

b. Letterpress printing ink

c. Flexographic printing ink

d. Gravure printing ink

e.Shot printing ink

3 gravure ink classification. The inks used for gravure printing are mainly classified according to their uses. They are classified into publication inks, packaging inks, and industrial inks.

The inks used in composite flexible packaging materials are basically in the category of packaging printing inks, and they are the most concerned species.

2) Composition of ink

The printing ink is a paste colloid that is uniformly dispersed and mixed with materials such as colorants, binders, and fillers. The pigment imparts colorful tones for printing, the binder serves as a carrier for the color material, and the binder also binds the pigment to the surface of the substrate. The filler imparts appropriate properties to the ink, allowing the ink to satisfy the printability of various printing processes. . The liquid ingredients in the ink are called binders, and the solids are classified as colorants and various additives.
The gravure printing ink is generally composed of 5% to 15% of a pigment, 20% to 40% of a binder resin, 0% to 60% of a solvent, and 0 to 5% of an adjuvant.

2. The current situation of ink at home and abroad

1) Domestic gravure ink

At present, domestic printing inks are divided into general soft packaging (such as shopping bags, maternal and child hygiene products) ink (the ink is mainly benzene-soluble polyamide resin PA), cigarette packaging ink (based on nitrocellulose resin NC) and carton Ink (water-based ink), and more than 70% of compound inks are BOPP special inks based on chlorinated polypropylene (CLPP), 10-20% of polyurethane (PU) inks, and some are PVB alcohols. Dissolve ink. Due to factors such as price, different materials and different packaging use different inks. The printing factory said that there are many types of inks and there are many inventories, and delivery is easily delayed.

2) Foreign gravure ink

Japan and Europe and the United States, due to different packaging requirements, so the ink system is also very different, a small number of advertising newspapers in Japan for rotary flexo printing. Most of the hygiene products are gravure printing (the ink gradually shifts from benzene to benzene-free (aliphatic hydrocarbon solvent) system, and the cigarette package is mainly gravure, and the composite packaging bag is benzene-soluble polyurethane (turn to benzene-free) system. CLPP system Has basically disappeared, in the field of composite packaging, a large proportion of general-purpose ink, Europe and the United States in addition to composite bags, the other main flexo-based, (water-based or alcohol-soluble) even if the compound packaging is also alcohol soluble HC + PU-based, Therefore, in Europe and the United States color paste + resin solution, this program is very common.

3) The development trend of domestic gravure ink

In recent years, domestic ink usage has been growing at a rate of 10-20%, much higher than low-grade ink. It can be predicted that people's demand for ink quality will outweigh the price in the near future. At the same time, while continuously introducing printing equipment, people will also try to use foreign management models to manage their own workshops and gradually integrate with developed regions.

It is foreseeable that, along with the development of general-purpose inks or colorants and resin liquid systems, the production of inks will also move towards scale. The final model will be: On the one hand, mass production within the workshop, on the other , Ink factory staff in the printing plant all-weather technical services.

How to achieve the goal also requires a long process. It is not very realistic to go to the final step. At present, there are already some major printing companies that are doing this work. We are also cooperating. It can be predicted that there will be a satisfactory harvest in the near future.