Explore UV printing quality difference analysis (2)

Third, dry

Because UV drying equipment is expensive and its loss rate is fast, it analyzes the equipment in its drying process.

[1] The advantages and disadvantages of UV drying

1. Reduce air pollution: Since UV-dried materials do not contain 100% solids, there is no pollution.

2. Space-saving: The UV drying device is simple and safe. It can be dried in a short time and at room temperature. Therefore, the manufacturing cost is lower than that of the traditional hot blast stove.

3, save manpower: Because the process is simple, so save manpower and increase productivity and save electricity costs, because drying takes only a few seconds, so save about 60% of electricity costs. 4. Improve quality: Improve the quality and precision of the dried product, and it is also resistant to substances, chemical resistance, and non-toxic, especially in food packaging and toy printing. A special effect called fabricization and mattization is also obtained by UV drying.

[2] UV discharge tube

1. The relationship between the emission intensity of UV emission intensity and the type of light source, the emission UV light wave domain, the color difference and the number of lamps on the drying, and the ink adhesion and drying rate are closely related.

2, lamp life, such as type, wattage, number of use and time, instant start, cooling conditions, installation location, correct use and maintenance.

[3] The radiator consists of a reflector, a lamp holder, a cooling system, and an exhaust system.

1、 Reflector

A. Wide shot [flat light and astigmatism]

B. Spotlight: Improve drying efficiency, avoid waste of light source and harm the human body.

2. The lamp holder UV lamp normally emits more than eight hundred degrees of its temperature, so it must be high temperature resistant and well insulated ceramic holder.

3, the main effect of the cooling system is cooling, in the UV irradiation are high temperature, do not give normal cooling, lamp, radiator, line overheating and short circuit.

4. Exhaust system, shielding and safety device The exhaust system mainly makes the operating environment a comfortable space without heat and odor. UV light may cause damage to the skin and eyes, so it is shielded against UV light, and safety reasons add to the shutter device or reflector turn-up device.

Evaluation of the difference between UV and UV printing quality

In the UV printing, what kind of printing method is used is the most appropriate quality performance. Therefore, a product evaluation table is used. For UV screen printing and traditional thermosetting rotary printing for analysis. Since the cost and quality standards are known from Table 1, the quality and cost are equal to each other in the overall relationship. Therefore, 45% of them are taken as the analysis ratio of the evaluation.

[1] Quality

1. Resolving power: The relationship between the specifications of the screens of the screens and the resolution of screen printing is poor.

2. Ink color: UV inks perform poorly compared to traditional inks.

3, gloss: UV ink is better than thermosetting ink.

4. Abrasion resistance: The ink film formed after UV ink drying is stronger than the thermosetting ink.

5, hardness: UV ink is better than thermosetting ink.

6, drying temperature: UV ink non-thermosetting paper shrinks due to heat. Waves occur.

[2] Cost

1. Space cost: Thermosetting inks take up more space.

2. Equipment costs: The price of thermosetting is higher than that of UV.

3, ink cost: UV price is greater than thermosetting ink.

4. Ink inventory: UV needs less pigment to get rich colors.

5, energy consumption: UV energy is about half of the thermoset.

6. Maintenance and consumables costs: The consumption rate of materials used by UV is high, resulting in increased costs.

[3] Others

1, production

2. Environmental issues

3, operability, safety

[4] From the results of the evaluation, we can see from Table 1 that UV printing is better, as long as the research development is improved for its lack.

Table I

Wu, the future of printing

With ever-changing technology and rising environmental awareness, UV printing is imperative. Therefore, for the future UV printing needs improvement and discussion.

[1] Ink prices: The price of ink is roughly three times that of traditional ones, and inks are imported. Island ink manufacturers should actively develop UV inks.

[2] Equipment price: UV drying equipment itself is very expensive, and vulnerable materials such as lamps, blankets and so on. Therefore, in addition to the development of new dryers, alternatives are also found for vulnerable materials.

Lu, conclusion

At present, UV inks are used in the islands only for the screen printing industry, while for other types of business, because the causes of the differences do not affect the quality of their printed products, and invest in their UV equipment, not only to purchase new equipment, UV printing There will be a lot of room for development.

references

1. Luo Fulin, Li Xingcai [1995], Introduction to Printing Industry [below], p. 369, Publishing Department, Chinese Culture University, Taipei.

2. Institute of Printing Industry, Chinese Academy of Sciences, 1983, UV drying in kind, Print Collection, p.269-p.298.

3, Institute of Printing Industry, Chinese Academy of Sciences, 1983, Plastic Materials and Screen Printing Ink, Printing Forum, p.151-p.164.

4. Wu Guangwen, 1994, “Adaptive evaluation of rotary lithographic printing ink drying methods”, Huagang Printing Communication Technology, p.87-p.97.

5. Zhizhi Li, 1994. Discussion on Screen Printing Ink, Huagang Printing Communication Technology, p.150-p.159.

6. Wu Zhengyi, 1992. Discussion on the variable in the printing process of screen printing. The second period of Screen Printing Industry Intelligence, p.50-p.51, Industrial Information Magazine.