In Europe and the United States, flexo printing has become a market-equivalent printing method that rivals offset printing. In Japan, flexo printing ink accounts for less than 10% of all inks. Most flexographic products are associated with corrugated printing. Both use water-based inks.
In the field of flexible packaging, especially in the field of composite films, flexo printing has basically not achieved a decent market, but flexo printing has attracted more attention as an environmentally friendly way, and in recent years, with the advancement of printing-related technologies (printers, plates) High-line number of anilox rollers, etc.) have achieved higher printing quality than before, and some have entered the practical stage. By responding to the variety of flexo systems and the various types of substrates, the expectations of flexo printing to other printing fields are increasing. Flexo printing generally uses liquid ink with low viscosity. According to the nature of the solvent in the ink, the flexo printing ink can be divided into solvent ink, water-based (water-soluble) ink, and UV-curable ink. According to the substrate and use can get a variety of ink types, various types of ink based on the nature of the use of the connecting material (resin, solvent) and have different characteristics. The composition of the flexo ink is basically the same as the offset ink and the gravure ink, and is composed of a colorant (pigments, dyes, etc.), a binder (resin, solvent), additives (paraffin, defoamer, etc.).
The solvent used for flexo printing is limited by the corrosion resistance of the printing plate or the anilox roll. The resins that can be used are alcohol-soluble and water-soluble resins, and the selection range is narrower than that of the same gravure ink. In addition, due to the structure of the flexographic printer, the amount of ink transferred is smaller than that of the gravure printing. In order to ensure the printing concentration, the pigment concentration of the flexo ink is higher than that of the gravure ink. In addition, flexographic inks generally require the use of slower drying than the gravure ink (preventing drying of the plate).
Flexible packaging for aqueous inks. Advantages of water-based advantages for the environment include: 1) water-based requirements of end-users, reduction of residual solvents in packaging materials, and improvement of safety performance; 2) prevention and control measures of air pollution, improvement of printing operation environment, and restrictions on fire control regulations (inventory inventory) , The fire hazard is greatly reduced.
The following three points must be considered in the design of water-based inks for flexible packaging:
1) In order to improve the image quality, an anilox roller (800 lpi) with a high number of screen lines is used, resulting in insufficient printing ink concentration (high concentration ink design, increased ink transfer rate);
2) Wetting of the plastic film due to the high surface tension of water and a decrease in adhesion properties (improved wettability by addition of alcohols, especially by corona treatment of the OPP film).
3) Slow drying is the cause of printing speed. The thickness of the ink film can be reduced by designing a high-density ink, or the drying performance can be improved by adding an alcohol solvent, or the drying ability of the printing apparatus drying apparatus can be improved.
First, as described above, in order to improve the printing quality, the accuracy of the anilox roller to be used tends to be high (the cell capacity is reduced), and in order to realize the application of a small amount of ink, it is necessary to achieve a high concentration in the ink design, or to make The ink transfer performance improves.
Second, in order to achieve stable printing, it is necessary to ensure that the water-based flexo ink has the necessary properties such as wettability and reliable adhesion to the plastic film. As a technical measure, it may be considered to use an alcohol solvent, corona treatment during printing (especially for OPP film), and a tackifier.
Third, due to water-based inks, water dries slowly. In general, drying performance is poor compared to solvent inks, so the printing speed is lower with the same drying capacity of the printing press. In this regard, it may be considered to reduce the thickness of the printing ink film to improve the drying performance.
In each of the above points, special care must be taken to ensure stable printability by adjusting the drying properties of the ink.
In the case of aqueous ink, it is possible to adjust the drying performance by adding glycol ether, which has a lower drying speed than water, depending on the printing conditions.
For flexible water-based flexo printing inks with plastic film as the object, the biggest problem is how to deal with the contradiction of increasing the drying speed of the substrate and delaying the drying time of the ink on the printing plate.
Source: "Printing World"
In the field of flexible packaging, especially in the field of composite films, flexo printing has basically not achieved a decent market, but flexo printing has attracted more attention as an environmentally friendly way, and in recent years, with the advancement of printing-related technologies (printers, plates) High-line number of anilox rollers, etc.) have achieved higher printing quality than before, and some have entered the practical stage. By responding to the variety of flexo systems and the various types of substrates, the expectations of flexo printing to other printing fields are increasing. Flexo printing generally uses liquid ink with low viscosity. According to the nature of the solvent in the ink, the flexo printing ink can be divided into solvent ink, water-based (water-soluble) ink, and UV-curable ink. According to the substrate and use can get a variety of ink types, various types of ink based on the nature of the use of the connecting material (resin, solvent) and have different characteristics. The composition of the flexo ink is basically the same as the offset ink and the gravure ink, and is composed of a colorant (pigments, dyes, etc.), a binder (resin, solvent), additives (paraffin, defoamer, etc.).
The solvent used for flexo printing is limited by the corrosion resistance of the printing plate or the anilox roll. The resins that can be used are alcohol-soluble and water-soluble resins, and the selection range is narrower than that of the same gravure ink. In addition, due to the structure of the flexographic printer, the amount of ink transferred is smaller than that of the gravure printing. In order to ensure the printing concentration, the pigment concentration of the flexo ink is higher than that of the gravure ink. In addition, flexographic inks generally require the use of slower drying than the gravure ink (preventing drying of the plate).
Flexible packaging for aqueous inks. Advantages of water-based advantages for the environment include: 1) water-based requirements of end-users, reduction of residual solvents in packaging materials, and improvement of safety performance; 2) prevention and control measures of air pollution, improvement of printing operation environment, and restrictions on fire control regulations (inventory inventory) , The fire hazard is greatly reduced.
The following three points must be considered in the design of water-based inks for flexible packaging:
1) In order to improve the image quality, an anilox roller (800 lpi) with a high number of screen lines is used, resulting in insufficient printing ink concentration (high concentration ink design, increased ink transfer rate);
2) Wetting of the plastic film due to the high surface tension of water and a decrease in adhesion properties (improved wettability by addition of alcohols, especially by corona treatment of the OPP film).
3) Slow drying is the cause of printing speed. The thickness of the ink film can be reduced by designing a high-density ink, or the drying performance can be improved by adding an alcohol solvent, or the drying ability of the printing apparatus drying apparatus can be improved.
First, as described above, in order to improve the printing quality, the accuracy of the anilox roller to be used tends to be high (the cell capacity is reduced), and in order to realize the application of a small amount of ink, it is necessary to achieve a high concentration in the ink design, or to make The ink transfer performance improves.
Second, in order to achieve stable printing, it is necessary to ensure that the water-based flexo ink has the necessary properties such as wettability and reliable adhesion to the plastic film. As a technical measure, it may be considered to use an alcohol solvent, corona treatment during printing (especially for OPP film), and a tackifier.
Third, due to water-based inks, water dries slowly. In general, drying performance is poor compared to solvent inks, so the printing speed is lower with the same drying capacity of the printing press. In this regard, it may be considered to reduce the thickness of the printing ink film to improve the drying performance.
In each of the above points, special care must be taken to ensure stable printability by adjusting the drying properties of the ink.
In the case of aqueous ink, it is possible to adjust the drying performance by adding glycol ether, which has a lower drying speed than water, depending on the printing conditions.
For flexible water-based flexo printing inks with plastic film as the object, the biggest problem is how to deal with the contradiction of increasing the drying speed of the substrate and delaying the drying time of the ink on the printing plate.
Source: "Printing World"
Kitchen Storage And Organization
The kitchen storage and organization items are the main products we produce in our factory, with a variety of different designs and solid structures, you will love our products, all our products are designed in-house, if you have a style you like you can also send us pictures of the design. We can also do it for you and look forward to working with you.
Our factory mainly develops and produces various types of disassembled furniture, simple furniture, storage boxes,Our products include: multifunctional storage rack, assembled Coffee Table, side table, computer table, desk, chair, dining table, 3-layer shelf, 4-layer shelf, 5-layer shelf, wall shelf, tissue tube, storage basket, carrying basket,laundry rack ,etc .
Modern decoration is all about simplicity, cleanliness and generosity, and as our lives become more and more fast-paced, we have a lot of things that need to be stored and categorised to make our homes look more tidy and convenient.
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