The hottest UV printing technology promotes the po

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UV printing technology promotes the popularity of transparent folding plastic boxes

nowadays, the competition in the daily cosmetics market is very fierce. Manufacturers try their best to find novel and attractive packaging, so as to highlight the internal quality of products and the attraction on shelves. There are so many products on the shelves of retailers that manufacturers have to try their best to make their products look different in packaging. At present, the use of crystal transparent packaging materials has become a popular trend. Transparent packaging is widely used in European, American, Japanese and other daily cosmetics markets, and clear and transparent packaging is more fashionable

with the improvement and development of UV printing technology, transparent folding plastic boxes are gradually popular in the market with their significant advantages in commodity performance, resistance and anti-counterfeiting, and are increasingly used in daily cosmetics packaging. At present, transparent folding plastic boxes are mainly made of PVC (polyvinyl chloride), pet (polyester) and PP (polypropylene). Because the price of PVC is relatively low, and the surface printing performance is better than that of pet and PP materials, transparent folding plastic boxes made of PVC are more common. However, due to the poor environmental protection performance of PVC, insiders predict that as people's awareness of environmental protection increases from the 20th to the 22nd, the amount of PVC will gradually decrease, and may be replaced by PP and P welding procedure qualification, welder examination and test et

uv printing advantages

plastic sheet is easy to soften and deform when heated, so the transparent folding plastic box cannot be dried by hot air after printing, but should adopt UV curing method. Accordingly, the printing ink must choose offset UV ink or UV ink, so as to ensure the smooth progress of printing

uv printing has many advantages, such as improved production speed, improved product performance, quality optimization, environmental protection standards, cost reduction, cold curing on thermal substrates, reduced energy consumption, loss reduction, less space occupation, and enhanced chemical resistance of products such as solvents or detergents. UV curing does not need heat source, does not contain solvent, and can cure quickly (the curing time can be less than one second). It is especially suitable for the printing of non absorbent substrate materials, and is also particularly suitable for multi-color high-speed printing. UV curing the whole curing system is a solvent-free system, i.e. 100% solvent-free formula and no VOC (volatile organic compound). On the one hand, it meets the requirements of environmental pollution regulations. At the same time, due to the cancellation of powder spraying, the working environment is greatly improved and the machine wear caused by powder spraying is reduced. On the other hand, UV curing can bring economic benefits to investors, such as high productivity and high process output, and reduce the storage of raw materials and finished products

printing plastic sheets with UV ink can produce special effects such as wrinkles and sanding, and the field printing effect is very good, but the reproduction effect of eye tone image is poor, because silk printing is not suitable for printing fine patterns, and the resolution can reach 80 lines/inch. UV offset printing is very beneficial to the reproduction of eye tone images, and its resolution can reach more than 200 lines/inch, which is almost the same as the quality of paper printing. If there are many cosmetic packages with human images printed, it is better to use UV offset printing as can be seen from table 1

common problems of UV printing of plastic boxes

compared with traditional ink printing, UV printing does have great advantages, but UV ink printing on the surface of plastic substrate is still a challenging work. What are the specific standards then? Take the spring change experimental machine as an example: the biggest problem of UV ink printing on plastic substrate is how to make UV ink firmly adhere to the surface of plastic substrate, that is, adhesion

uv ink in the curing process, the internal components are crosslinked and polymerized, and the volume changes instantly, resulting in large internal stress, which affects the adhesion of the ink to the substrate. Therefore, before printing, the surface of plastic sheet is generally treated to improve the surface tension of plastic sheet and increase the adhesion of ink. At present, corona treatment is more used

although this problem can be improved by surface treatment or modification of substrate, the fundamental solution is to seek and develop UV inks with good adsorption, low shrinkage stress and low price

registration is also one of the common problems in UV plastic printing. Plastic sheets are harder and less flexible than paper, so it is easy to produce inaccurate overprint in the printing process. In this regard, when positioning the plastic sheet, only the side push gauge can be used, and the side pull gauge cannot be used, so as to avoid inaccurate overprint caused by insufficient pull gauge force. In addition, the heat generated by the infrared ray during the startup of the UV lamp is enough to deform the plastic sheet, resulting in inaccurate overprint and unstable print size. For this problem, Manroland adopts the cold UV technology of eltosch company on its offset printing equipment. This technology uses replaceable reflectors to reflect the generated infrared rays when the UV lamp is started, and uses a cooling source to cool it. In the process of operation, it uses the emitted UV light to solidify the UV ink

new progress in UV printing technology

UV stereo grating ink uv-1278n has been introduced in China, which is mainly used for printing stereo grating films. Different from the traditional hot pressing process, the new process adopts the silk printing method to print the ink on the packaging machine 'target'=_ Blank> a cylindrical grating pattern is directly formed on the transparent diaphragm; The three-dimensional grating ink can also be directly printed on the printed matter to form a three-dimensional pattern, and the pattern can also be selectively printed to make the local three-dimensional. The three-dimensional effect of the printed pattern is obvious, which is comparable to the hot pressed grating plate, opening up a new method for three-dimensional printing. The printing of grating diaphragm with this ink can greatly reduce the production cost and improve the production efficiency. The printing substrate can be transparent plastic film, such as PVC, PC, pet, paper, metal, glass, ceramics, etc. the number of wire mesh is 200 ~ 350. The ink is colorless and transparent, UV curable, the cured film does not turn yellow, and has good adhesion fastness and toughness

Muba CD74 offset press for UV printing

for commercial printing enterprises, packaging and label printing enterprises that use a variety of substrates, as well as printing enterprises that use double-sided printing to produce greeting cards or book covers and other products, Muba CD74 double-sided printing machine is an ideal model

in addition to the standard models of single-sided printing and double-sided printing, the speedpa CD74 also has various configurations of printing units and glazing units. It can be a model with dual glazing units, a model that integrates UV glazing and other functions, or a model that finishes glazing before printing or after printing in one run. It is completely configured on demand

uv inks and varnishes have been rapidly popularized in the printing industry. They can better adhere to non absorbent materials, which are not easy to fall off, but also have high gloss. Xuba cd74uv offset press follows this development trend. At the same time, it is also the first offset press in the world to be awarded the title of "best UV printing" by the German printing and paper industry insurance and Protection Agency. All elements related to UV printing are integrated by CD74. It can be said that CD74 has opened up a precedent for production process, equipment operation and investment guarantee

with the expansion of the transparent folding plastic box packaging market, in order to increase communication between upstream, midstream and downstream enterprises in the plastic box processing field and improve the printing and molding technology of transparent folding plastic boxes, this journal held the first South China transparent folding plastic box processing technology seminar on May 16, 2006. The meeting focused on the topics of plastic box shape design, plastic box post press molding technology, plastic box material and glue matching, plastic box glue spraying system and so on. Henkel, Avon, Colgate, blue moon, Libai and other well-known end users in the daily chemical industry also delivered speeches on site. The development of transparent folding plastic box is still in its infancy, and its processing technology still needs to be continuously improved and improved, among which the development and exploration of enterprises themselves is particularly important. From the meeting, in addition to using UV technology to print plastic boxes, some enterprises also used ordinary offset press + quick drying ink to print plastic boxes, and the quality is also good

source: global color box industry

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