1. Flexogravure Flexo printing materials have many varieties and specifications. The range depends on the products that need to be printed and processed. It determines the basic performance requirements of the printing press. The range of commonly used materials for flexible packaging is:
PP/OPP/BOPP: 18-60μ, PET: 10-30μ, CPA: 20-60μ, BOPA: 10-20μ, aluminum foil: 18-40μ, paper: 40-120g/m 2 . The minimum thickness of the printed film of a flexible package gravure press can reach 7-9μ.
2. The width of printing materials is most commonly 1000-1300mm. Foreign countries have recently produced a flexible packaging gravure printer with a width of 1700mm.
3. In the past few years, the most commonly used 8-10 units for gravure printing machines on the international market. As the use of spot colors in packaging is becoming more and more common, the number of color sets for gravure printers has increased in recent years. If line coating and compounding are used, the unit may be more.
4, printing graphics and text repeat length (ie plate cylinder circumference) is generally 420-920mm internationally, and even the maximum length of the text and graphics may reach 1100mm; domestic manufacturers often use 408-942mm (ie plate diameter of φ130-300mm ).
5. The maximum roll diameter of a flexible packaging gravure press is 800-1000mm, and 600mm is also commonly used on medium and low speed machines. In wire-composite gravure printing machines, the diameter of the take-up diameter increases correspondingly to the unwinding diameter, but generally it does not exceed 1270mm (50′′). The diameter of the feed roll spindle is generally 76mm (3′′), but it may also be in the winding section. A 152 mm (6") mandrel was used.
6. The highest production speed of home-made flexible packaging gravure printing presses is currently between 60-200 meters per minute, most foreign machines are 150-300 meters per minute, and the maximum has reached 450 meters per minute.
7, for the common width of the gravure printing machine, the tension range is mostly within 3-30 kilograms, such as printing thin paper can also reach 4-40 kg or 4-50 kg and so on.
8. Connection processing method: The most commonly used connection processing of flexible packaging gravure printing machine is compound (including dry, wet and solvent-free compound), coating (including ordinary coating, hot melt, cold sealing), and can also be used. Other connection processing methods.
9, overprinting and processing accuracy: "color one color" overprint accuracy is generally up to ± 0.1mm, but for some stretchable materials can only reach ± ​​0.25mm.
10. Dry heat source: Several common heat sources (steam, electricity, hot oil, and natural gas) can be used.
11, electrical standards, safety standards and maximum noise standards: the same as other gravure printing machine.
12. Solvent Residue Standards: Because soft packaging is often used to contact foods and medicines, it has higher requirements for health indicators. However, it should be pointed out that there are many factors that affect the amount of residual solvent, and the gravure printer is just one of them.
PP/OPP/BOPP: 18-60μ, PET: 10-30μ, CPA: 20-60μ, BOPA: 10-20μ, aluminum foil: 18-40μ, paper: 40-120g/m 2 . The minimum thickness of the printed film of a flexible package gravure press can reach 7-9μ.
2. The width of printing materials is most commonly 1000-1300mm. Foreign countries have recently produced a flexible packaging gravure printer with a width of 1700mm.
3. In the past few years, the most commonly used 8-10 units for gravure printing machines on the international market. As the use of spot colors in packaging is becoming more and more common, the number of color sets for gravure printers has increased in recent years. If line coating and compounding are used, the unit may be more.
4, printing graphics and text repeat length (ie plate cylinder circumference) is generally 420-920mm internationally, and even the maximum length of the text and graphics may reach 1100mm; domestic manufacturers often use 408-942mm (ie plate diameter of φ130-300mm ).
5. The maximum roll diameter of a flexible packaging gravure press is 800-1000mm, and 600mm is also commonly used on medium and low speed machines. In wire-composite gravure printing machines, the diameter of the take-up diameter increases correspondingly to the unwinding diameter, but generally it does not exceed 1270mm (50′′). The diameter of the feed roll spindle is generally 76mm (3′′), but it may also be in the winding section. A 152 mm (6") mandrel was used.
6. The highest production speed of home-made flexible packaging gravure printing presses is currently between 60-200 meters per minute, most foreign machines are 150-300 meters per minute, and the maximum has reached 450 meters per minute.
7, for the common width of the gravure printing machine, the tension range is mostly within 3-30 kilograms, such as printing thin paper can also reach 4-40 kg or 4-50 kg and so on.
8. Connection processing method: The most commonly used connection processing of flexible packaging gravure printing machine is compound (including dry, wet and solvent-free compound), coating (including ordinary coating, hot melt, cold sealing), and can also be used. Other connection processing methods.
9, overprinting and processing accuracy: "color one color" overprint accuracy is generally up to ± 0.1mm, but for some stretchable materials can only reach ± ​​0.25mm.
10. Dry heat source: Several common heat sources (steam, electricity, hot oil, and natural gas) can be used.
11, electrical standards, safety standards and maximum noise standards: the same as other gravure printing machine.
12. Solvent Residue Standards: Because soft packaging is often used to contact foods and medicines, it has higher requirements for health indicators. However, it should be pointed out that there are many factors that affect the amount of residual solvent, and the gravure printer is just one of them.
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