Development of Green Non-plate Hot Stamping Ink

I. INTRODUCTION In packaging printing inks, anodized aluminum stamping, which is used to improve the decorating effect, has played an indelible role for the packaging industry because of its brilliant sparkling effect.
Organic color aluminum and inorganic metal electrochemical aluminum used in the hot stamping the earliest, its specifications are 8 #, 12 #, 15 # and hot stamping temperature control 75 °C ~ 90 °C, 60 °C ~ 70 °C points. Usually flat and round flattening manual and automatic hot stamping machinery, hot stamping range is divided into ink paper, glossy paper, polystyrene, PVC hard plastic and soft PVC plastic and wood and other types.
Most of the galvanized aluminum is made of a polyester film supported (film base), a resin layer coated with an alcohol-soluble dye, vacuum metallized aluminum and copper and organic color dyes, and then coated with an adhesive layer. The stamping or curved air embossing with metal engraving, metal corrosion or photosensitive resin platen hot press stamping on books, plastics, leather and other materials (commonly known as hot copper, aluminum, and color anodized aluminum) has greatly improved The added value of packaging and decoration. At present, due to the shortage of resources and expensive prices of electrochemical aluminum, as well as waste pollution and time spent processing photolithography, it has long been unable to meet the requirements of the packaging and printing industry, and it is unable to meet the needs of the advertising and building materials industries. Therefore, it is imperative to look for a quality and cheap alternative to non-platen hot stamping ink.
Based on the above research, we carried out an analysis of the properties of anodized aluminum and research work on non-platen hot stamping ink products. After repeated trials, trial production and comparative demonstrations, the hot stamping inks we developed can approach the effect of the use of anodized aluminum on printing materials. The ink system is rich in raw materials, and its price is higher than that of conventional aluminum duty rooms. In the hot stamping ink system, we boldly used Tianjin Lisheng Chemical Factory's 1 introduction of antioxidants to improve the resistance of the stamping products; 2 Introduce anti-ultraviolet absorbers to enhance and extend the quality characteristics of the stamping products; 3Introduce stability In order to improve the stability of the hot stamping ink in storage and transportation. Through the use of tests, not only can replace the aluminum foil in the traditional round flat or flat pressure printing machine on the hot stamping, but also more suitable for rotary round-round round large-volume direct hot stamping and manual room temperature or hot stamping process technology. The development of this product has opened up a new hot stamping route for China's packaging industry, cultural and educational propaganda, building materials, and advertising accessories.
Between exploration and reality, practice and science, what is condensed is the pursuit, struggle and hard work of human civilization. We learn from the use and performance of traditional anodized aluminum to explore the production of non-platen hot stamping ink to simplify the production process of the un-stamped hot stamping technology, trying to adapt to the high efficiency and fast pace of today's economic development.
Second, the development of the laboratory We have developed a non-printing stamping ink in addition to the actual performance of the alternative to the aluminum, but also to meet the needs of the entire printing industry printing industry users, but also more convenient to expand the needs of people's daily lives.
The main physical and chemical technical quality indicators of traditional aluminum are shown in Table 1. Table 1 Electrochemical aluminum technical indicators

level

Item Level 1 Grade 2 Coating 1. Uniform, smooth, white, no stripes.
2. The total number of folds in one roll must not exceed 10 meters/100 meters.
3. The trachoma in a roll (100 meters) does not exceed 0.1 meter.
4. The primer layer can be slightly dark, but it does not affect the quality of the stamping and the brightness of the color.
5. No more than two joints in a roll. 1. Partially visible stripes are allowed in the coating.
2. Allow the primer to deuterate.
3. Allow some trachoma to exist. Color layer 1. Color evenly, no visible color after hot stamping.
2. The brightness is good, the color close to the standard (according to hot stamping). 1. The coating is slightly uneven, such as slight flowers, slivers, and folds.
2. The color and brightness are lower than the standard. Model No. 8#12#15# Brightness below 90°C Hot Stamping Color unchanged below 90°C Hot Stamping Color unchanged 1. Hot Stamping Color unchanged below 90°C
2.After pasting at 110°C, the color is not changed. The definition of hot stamping "Fourth" is clear or slightly contiguous. 100 weights are resistant to 2000 times. 100 yards are resistant to 3,000 times. Hot Stamping Range: Ink paper, coating paper, hot Printing temperature: 75 °C ~ 90 °C hot stamping range: polystyrene, PVC hard plastic and wood.

Stamping temperature: 75 °C ~ 90 °C hot stamping range: PVC soft plastic.

Stamping temperature: 60°C~70°C
Among them, the stamping temperature is the main factor affecting the performance of the use of aluminum and the use of type (copper, zinc plate and photosensitive resin plate), so the main quality and technical indicators must be close to the electrification in the development process of the non-platen stamping ink. Aluminum (reference or visual inspection).
1. The choice of raw materials The choice of the right melting point resin, especially in the choice of hot stamping procedures can be performed at room temperature, so that rapid filming after hot stamping and can immediately remove film forming.
2. Selection of process conditions and sample trial production Under the premise of ensuring that the hot stamping ink's melting point, softening point, etc. are close to the traditional technical specifications of the aluminum, we used GB/T14624.1 to find the optimum dispersion process conditions for manufacturing synthetic inks. 93, QB559-83, QB574-83, GB/T14624.5-93, GB/T14624.3-93 and other test methods.
3. Formulation Design 1 Resin (commercially available) 50% 2 Additives (Tianjin Lisheng Chemical Factory) 14% 3 Dyestuff (Hangzhou Lily Group) 16% 4 Others 20%
4. Production process ingredients→Additives→Colorants, Other Additions→Melting and Dispersion→Grinding→Filter→Packing→Incoming Storage 5.Test Results (See Table 2) Table 2 Test Results

Item Test number Technical quality index Color fineness μm Viscosity s Dry speed s Viscosity mm Fluidity mm1 Near sample ≤ 20301530542 Near sample ≤ 25382724473 Near sample ≥ 30475220404 Near sample ≤ 2025183250 Mean value/ ≤ 203530.526.548.1
From the test results, it can be seen intuitively that the effect of the fourth test is even closer to that of aluminum. Color near sample, fineness 20μm, viscosity 25S/25°C·coating - 4 cups, dry speed 18S (hot stamping surface)/25° (initial dry speed value), viscosity 32mm, fluidity 50mm.
The final optimum conditions were: reaction temperature 75°C for 2 h, normal temperature 6 h, and solid content 26%.
Third, the practical test 1. Normal temperature non-printing hot stamping test using a flat surface pressure table as a worktable, the calligraphy of "Ninja can be ninja, contentment is often happy" figure type on top, and then spread a piece or a ratio The figure is slightly larger 20mm flat glass or film, until 1 ~ 8h after the weight of objects can be removed, the results of the product surface to form a smooth and bright mirror-like hot stamping ink film, close to the effect of aluminum, to prove its quality Are similar.
2. Hot Stamping Method for Calligraphy and Graphics After 3 to 24h after the calligraphy and calligraphy (completely drying out), the hot stamping part will be placed on a flat or round thermostat (which can be a flat temperature resistant material). , and then stamping (1) in the hot stamping parts for hot stamping - cooling - removal - finished products for sale

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