Discussion: Color Film Bending In Successful Commercial Printing
Modern Print Industrial development of India and color from the color to six-color, eight-color, efficiency, even from multiple machines to process the development of a shape, set printing, cutting, embossing, foil stamping, laser on one. In the process of mechanical and electrical integration, production is also bound to be a series of new problems Trademark Bending is even a molding machine production quality problems often encountered. Trademark trademark bending only affects the appearance, but also directly harm the applicability of the user on the machine, resulting in user dissatisfaction, to stop the use of such trademarks. How to effectively address and control the production of the trademarks appearing bent on improving product quality and meet customer needs is of great significance.
Film in the printing process Why does it bend?
Learned from the experiment, at a certain pressure and temperature conditions, the greater the tension, the higher the temperature, the greater the deformation of thin films.
In a molding machine with multi-color gravure printing process, the films were 20daN ~ 35daN pull, 25daN ~ 40daN pressure, drying temperature 60 ~ 100 , after several print drying, stretching, rehabilitation, varying degrees ground deformation, and in print in ink as applied, would cause lateral margin on the film surface and is local, the different foreign-sided stretch, deformation, recovery, and therefore appear in the finished product trademarks bending phenomenon, especially in uniform tension degree of poor quality film will be a serious bent.
Trademarks of production for the bending phenomenon appeared, can take the following measures:
(A) of the film control In order to reduce the bending
trademarks, brands in the choice of print films, to a reasonable choice of famous high-tech, can ensure the reliability of PP resin, film thickness and evenness of change control and reliable, cutting rewinding tension uniform. Ensure that the film surface tension evenly balanced state and is conducive to printing and to avoid bending.
(B) of the ink, solvent control
In the printing process, because the film side imposed ink, printing ink, resin, trademark logo, solvent evaporation, on the curved mark different degrees. Ensuring the design, color to meet user needs under the premise of origin of the ink, to impose the thickness of the solvent of choice to compare, select the resin soluble ink must be strong, good performance is hard to form paste; thickness according to product requirements, the plate in the Net depth is generally not more than 35 m; solvent mixed solvent used to maintain a balance that can not be too volatile, but also participate in a certain temperature (usually no more than 80 ), the product is not adhesion.
(C) the speed, tension and harmonious relations
Tension in the printing process under certain conditions, the higher printing speed, the greater the degree of bending mark; the contrary, the printing speed is, the greater the tension, the greater the bending mark. In order to play equipment in the production efficiency, reduce the speed can not be used to resolve trademark bending, tension parameters which have a reasonable choice to solve quality problems. For example, running speed is 130m/min, before pulling tension 20daN, after the tension 35daN is a better parameter, as for the actual selection of parameters can be adjusted according to the printing effects.
(D) of the drying temperature and air volume of
Drying temperature the higher the printing process has some advantages, but the temperature is too high, trademark bending phenomenon appears, therefore, the general level of printing the temperature stable at 55 ~ 90 . Oven into the wind pressure and exhaust pressure must be balanced. If the exhaust excessive film shrinkage intensity is also large, trademark bending serious.
(5) printing ink, printing patterns, the impact of solvent on the trademark curved
Bending degree of varnish solvent printing area
Large domestic full version fast evaporation
In volatile domestic brands in the strip
Slow evaporation of small irregular imports
I am an expert from Mp3 Player Manufacturers, usually analyzes all kind of industries situation, such as white lacquered furniture , kohler shower panel.
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