subject: Plastic color printing trademark bending cause - printing, trademark, bending - Printing Industry [print this page] Plastic color printing trademark bending cause - printing, trademark, bending - Printing Industry
Modern Print Industrial development of India and color from the color to six colors, eight colors, the efficiency of processes from development to on-line more than one shape, set printing, cutting, embossing, foil stamping, laser in 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, satisfy customer needs is of great significance.
Why film in the printing process it will appear bent?
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 of 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 trademark bending phenomenon, especially in uniform tension degree of poor quality film will be a serious bent.
Trademark production for the bending phenomenon occurs, may 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. To ensure uniform film surface tension balance condition and is conducive to printing and to avoid bending.
(B) of the ink, solvent control
In printing process, because one side imposed ink film, ink, resin, trademark logo, solvent evaporation, on the mark bends of varying degrees. Ensuring the design, color to meet user needs under the premise of origin of the ink, the thickness applied, to compare the choice of solvent, ink and resin solubility must choose strong, good performance is hard to form paste; thickness according to product requirements, the plate in the Net depth usually does not exceed 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 ), so that products do not adhesion.
(C) 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 the actual selection of parameters can be adjusted according to printing results.
(D) 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.
(E) ink, printing patterns, the impact of solvent on the trademark curved (in the table below)
