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UV technology in the can-making industry

- Jul 30, 2018 -

UV is the abbreviation of the English Ultraviolet Rays, namely ultraviolet rays. Ultraviolet (UV) is invisible, violet light is visible outside the period of electromagnetic radiation in the wavelength range of 210-400nm.

    

    Application of UV printing process technology is the use of special inks to UV rays in a certain wavelength range and the rapid formation of a stable three-dimensional network of macromolecules physical and chemical properties, high surface brightness ink technology.

    Status and application of UV printing technology development

   

      Developed the world's first UV ink is the United States, probably in the early 1960s. 20 UV inks late 1960s in the United States have started industrial production, which was mainly in order to meet regulatory requirements and environmental development. Japan in the early 1970s began the industrial production of UV inks and UV inks manufactured equipment.

   

     Country in the 1980s began to introduce the UV light and UV ink printing technology and equipment, while other domestic ink ink factory in Tianjin company has also developed UV inks and polishing oil. So far, China has become the largest country in UV and UV ink printers installed capacity in the world to use.

    

     UV technology in Yintiezhiguan industry mainly in 2004, Shanghai Bao Printing Co., Ltd. introduced metal painted the world's most advanced KBAMetalprint company metalstar2 six-color UV printing machine iron as a symbol, followed by Hangzhou COFCO Packaging Co. also introduced indeed Lai UK five-color UV printing machine, thus UV printing technology in China has entered a new period of development.


    

      Traditional Indian iron craft each step and Control Points

 

    1. Coating

    It must first coating prior to printing. Under normal circumstances, the tin coating and printing needs front inner surface coating paint need to protect Indian iron products with good canning, canning and exterior decoration requirements. Classification by resin coating oily, phenolic, epoxy, polyester, vinyl, acrylic, amino group, according to zoning has an inner surface coating, outside paint, colored paint, varnish coatings, specialty coatings.

 

    2. Engraving

    Indian iron plate with ordinary offset printing plate is basically the same, but the product will eventually be printed iron canning, so the printed version of the iron cans must meet the requirements of the plate when you want to understand clearly the basic characteristics of metal packaging containers. For example, oil cans, empty their plate to consider when resistance welding requirements, there is a certain distance between the patterns, the product is easy to India after cutting iron processing needs can be facilitated, as well as high-frequency welding canning, and then such as batteries shell. To arrange as much as possible the number of tinplate size only within the specified range, but also easy to cut the battery casing and punching. In addition, the candy category, to understand lid blanking blade size, and accordingly leave some excess material that would make the cover of punching trouble

 

    3. print

    After coating the inner surface of tinplate outer coating, available printed on the machine (except for special craft). Printing machine division monochrome and multi-color machine machine three kinds. At present, the choice of imports is mainly determined Lai Britain's two-color printing machine and iron Fujitsu's color printing iron machines, domestic machine mainly Shanghai Goss Graphic Systems Co., Ltd. Printing monochrome machine. Structural principle similar to Offset Printing Machine. Ink balance will have to be adjusted, the printing pressure adjustment and overlay accuracy regulation due tinplate surface is different from the paper, not the kind of pores absorbent paper, so when considering the color sequence can not arrange a large area of wet-on-wet multicolor printing overprint only 5 percent or less of a wet-on-wet process outlets. When scheduling a color sequence, generally considered the pros and cons of the relationship between the main colors layout, overlay accuracy and operating on a detailed analysis based on product characteristics and performance of the machine itself.

 

    4. Glazing

    After all cased in iron and India face the need to cast a light oil, to increase the printing surface gloss, but also can improve the hardness of the surface of the product, so that the printing ink has a certain flexibility and corrosion resistance.

 

    5. dry

    Coatings and inks shall be subject to tunnel oven drying. Printing ink drying conditions generally between 130 ℃ -160 ℃, time control in 10-12 minutes, drying conditions for the coating of between 170 ℃ -210 ℃ tunnel oven about 30 meters. That made three phases into heating zone and a cooling zone temperature zone. Warming is the first stage after the tin into the oven. The main role is to enhance the tinplate from room temperature to the set temperature for the main function is to keep the district heating area temperatures reached. District cooling function is to make the dried tinplate prints get sufficient cooling, if cooling is not enough, the film can easily be stacked when tinplate scratched each other after stacking fork prone sticky film phenomenon

 

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