At present, there are more and more bank CARDS, membership CARDS, business CARDS and so on.Card holder is used to store CARDS or business CARDS and other paper card storage tools, can be very convenient and fast management of various CARDS.The size of the card bag is usually small and suitable for carrying.There are single and double inner sheets, large and small sizes, zipper closure and snap closure.
Features: No environmental pollution, the UV light required by the coating is provided by a special high-pressure mercury lamp. This energy is cold light energy, which reduces the risk of fire and improves the working environment. Since the UV varnish has a non-volatile content of more than 99% and contains little or no organic molecules (VCDs) of low molecular weight organic molecules, there are very few solvents or even no solvent volatilization during the photocuring process. Save space and energy, because the UV varnish does not require auxiliary equipment such as drying tunnels for common varnish in the curing process, and the UV curing machine has a small volume and high effective utilization rate, thus greatly saving space and energy, and reducing Pre-equipment investment. The production efficiency is high. Because the photo-solid reaction can be completed in an instant, the UV varnish can be directly stacked or entered into the next process after the printing is solidified, which accelerates the process and improves the production efficiency. Excellent chemical resistance, because the UV varnish is cured by UV light, forming an interwoven network structure, so it has strong wear resistance and chemical resistance. The quality of the concept is improved and the cost is reduced. Due to the special characteristics of the UV varnish, a dense light (or matte) film can be formed after curing, which has a good decoration and protection effect on the printed matter. Compared with the conventional laminating film, the cost is only About 1/4-1/3 of the film.
1, the gloss is not good, the brightness is not enough, UV Varnish in addition to the requirements of a specific matte, flat light and other effects, the general requirements of the higher the gloss of UV Varnish is better: The main reason A UV Varnish viscosity is too small, so that The print coating is too thin B Non-reactive solvent such as ethanol, toluene etc. Dilutes excessively C Luminous resin does not have sufficient glossiness. D The paper absorbs too much. E The anilox roll is so thin that the amount of transmitted light is too low F The number of doctors and screens Inappropriate solution: A High-gloss acrylic light-curable resin B is used to properly increase the viscosity of varnish C. Strictly control the amount of ethanol and toluene added. D. For highly permeable paper, firstly apply a primer layer or select a dense layer. The paper product E increases the diameter of the anilox roller F to reduce the hardness of the scraper. G When printing, you can also choose a lower mesh screen to increase the thickness of the coating. 2. The surface of the print cannot be printed with UV varnish: Main reasons: A. Low viscosity of UV varnish, too thin coating B. Oil stain on the surface of printed matter C. "Vitrification" on the surface of ink. Improper compatibility with varnish. D. Ink-containing materials (such as silicone oil, dusting powder) on the surface of the ink E Coated Anilox Roll Too fine; Solution:
A. Take necessary cleaning measures for the printed products to be coated. B. Adjust the viscosity of the varnish. C. Type and amount of additives in the varnish. Add a small amount of the wetting agent D. Use 2% alkaline solution to wipe the surface of the print.
3. The surface of the printed product is sticky and not well dried: Main reasons: A. Ultraviolet light power is insufficient. B UV lamp is aging. The strength is weakened. Improper selection of C UV varnish initiator D. Ethanol, toluene and other solvents are added too much E Machine Too fast paper feed speed F UV varnish itself has poor light-cured performance Solution: A Timely overhaul of equipment and replacement of lamp B Add a certain amount of photoinitiator and photosensitizer, such as triamine, to speed up the skin C Adjustment of the printing process 4, uneven surface coating, streaked and orange peel phenomenon: Main reasons: A UV varnish viscosity is too high B Pressure is not uniform C Coating is too large D UV varnish is poor Level E Paper Irregularity, too strong absorption F UV varnish surface is poor in peace Solution: A Reduce the viscosity of UV varnish B Reduce the amount of coating, adjust evenly in darkness C Add a small amount of leveling agent D Corona treatment on the surface of prints, To increase the UV light oil's affinity to the surface
5, UV coating pinhole phenomenon: Main reasons: A coating is too thin B anilox roller is too small C, ethanol, toluene non-reactive diluent is too much to add D print surface dust solutions: A to strengthen the operating environment Clean B can add a small amount of leveling host additives, wetting additives C Choose a special UV thinner to dilute, to prevent incompatibility of the system components D Try to increase the coating thickness when printing 6, the print surface has a crater, fish eye The main causes of the phenomenon: A. The surface of printed matter is not clean, and there may be poor leveling property of oil-based B UV varnish. The choice of anti-foaming agent for C varnish is improper, and the defoaming performance is too strong. Solution: A. Clean the surface of printed matter B. Reasonably use defoaming, Leveling additives
7. The main reason for the poor adhesion of UV varnish oil is mainly due to: A. The surface of the printing ink is "crystallized" and the varnish cannot be affixed and wet. B. The excipients in the printing ink are not properly selected. The adhesion of C UV varnish is insufficient. Unreasonable control of conditions, too short curing time or too long E Direct printing of UV varnish for non-polar or low polarity substrates (eg PE, PP, PET, OPP, BOPP, etc.) Solution: A Printing ink should be Choose the model B with lower wax content. Choose a photocurable resin with good adhesion and reactive monomer C to achieve a reasonable curing time. The curing time is too short. The surface of the UV varnish is cured and the underlying varnish is not completely cured, resulting in reduced adhesion. Curing time is too long, UV varnish over UV irradiation can cause poly and post-curing, so that the glaze film layer embrittlement, resulting in poor adhesion.
8. The main reasons for the poor toughness of glazing film: A UV varnishes' own resin and reactive monomer are not properly selected. B The glazing coating is too thick. C Improper handling of curing process. Solution: A Select photocurable resin with good toughness and activity Monomer, control the amount of monomer, reduce cross-linking and density B. In printing, use screen printing with a large number of meshes to reduce the coating thickness. C Master reasonable curing time.
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