Pad printing ink and the nature of the silk screen printing ink is not different, in principle can be general, the vast majority of ink pad printing ink manufacturer production is silk screen printing ink, solvent ink, in particular, due to the high viscosity, solvent ink used in the pad printing machine can adapt to the basic transfer of pad printing process requirements.Now the British APPOLO company and British COATES pad printing ink is to use the silk screen printing ink instead.
But if the scrutiny pad printing process and screen printing process, we will find that the main characteristics of pad printing ink is fast drying and good thixotropy.Ink stick to rubber pad printing head appears after the above table dry phenomenon, plastic, mobility, so that you can avoid by uneven phenomenon, when the ink from rubber pad printing head to the substrates, require good cohesion to prevent ink pad printing ink deinking is not clean.Transfer and pad printing ink layer are much thinner than the silk screen printing, pad
Printing ink color concentration is higher than silk screen printing ink.It is on this basis, make improvement on silk screen printing ink became a dedicated pad printing ink.So far, specializing in the production of the pad printing ink is not much, more famous is Germany MARABU inks, practice proved that using a dedicated pad printing ink for the printing effect is much better than use silk screen printing ink.Now MARABU company to market the six special solvent pad printing ink: GL, TPR, TPU, TPY, TPY, TPP, is completely suitable for a variety of substrates on printing printing, when we complete the might as well when printing with pad printing way preferred the ink.Abound, of course, the market is the SR and PY two series of silk screen printing ink, although also can be used in pad printing process, but will appear all sorts of problems, need to add to compensate ST1 filling agent and diluent, adds unnecessary trouble to print.Why don't we use pad printing ink?
On the issue of control ink solvent volatilization speed, MARABU once again showed its professional and meticulous, it is equipped with a series of open oil-water from slow to fast dry for selection, convenient * work according to the need to allocate.Along with the social demands for environmental protection of the increasingly strong, the use of UV ink is becoming more and more common, in the field of offset printing, intaglio printing, flexographic printing and resin printing and silk screen printing, the use of UV ink has reached the point of very mature, but is still in its infancy in pad printing process.There are two reasons, one is a dedicated UV pad printing ink can't use solvent UV
Thixotropy of silk screen printing ink, UV ink itself is not good, less plastic, the pad printing adhesive and ink head and deinking process, the traditional UV ink showed great inertia, table dry phenomenon is difficult to reach the standard of solvent ink, the other is UV ink often use photosensitive acrylic resin to make, acrylic resin on the surface of the rubber pad printing head, adhesion ability not make transfer problems, but now the situation has been solved, the domestic hangzhou kewang ink co., LTD takes the lead in the domestic developed UV pad printing
MARABU inks, and successful, Germany and France DUBUIT companies also recognize the market for UV pad printing ink, is stepping up its development, is expected in the near future in the field will bring about the use of UV ink pad printing.Pad printing ink layer thinner, to achieve the ideal color saturation, pigment fineness finer, the purity of the resin is more demanding, these are the difficulties of UV pad printing ink.In fact, solvent concentration higher than silk screen printing ink pad printing ink color is when we look at MARABU pad printing ink is not hard to find a feature.
It should be said that in the field using UV pad printing ink has is the trend of The Times, but so far, pad printing machine manufacturing enterprises haven't manufacturer for this progress to develop printing and UV curing one-piece type of pad printing machine production line.Is famous for its small the pad printing products, make its printing cost is low, the development of attachment type of pad printing machine are expected to receive broad market space.Using UV pad printing ink we can benefit in terms of dry when printing small text can we don't have to worry about ink will dry on the plate, so from the aspects of printing fine line, we would like to use UV ink.UV ink transparency in the site determines its advantage of replication, which in turn make originally is more suitable for overprint pad printing is more than the silk screen printing.
UV ink and solvent ink, to ensure the consistency of printing quality, need special instrument to detect some indicators and make it standardized, such as viscosity, surface tension, solvent ink solvent evaporation rate, the parameters of the UV curing, etc., on the detecting instrument investment will increase your company against the market competition ability.
Pad printing and screen printing, printing substrates involved in material is a lot of, we in glass, ceramics and metal printing tend to use two-component ink, when using two-component ink must consider the following points: one is the proportion of curing agent and ink must be accurate, the second is to mix evenly, third, we need to pay attention to the drying temperature, in general, the drying temperature is lower than the thermal deformation temperature of the substrate, some PP plastic lower temperature, the temperature of the metal ceramic and glass.Pad printing ink, as well as the selection of silk screen printing ink to experiment, provides a standard basis for formal production.
Use UV drying UV ink needed, but at present most of the UV dryer is designed in view of the screen printing process, specifications slants big, use on pad printing process can be a little waste, so manufacturers is necessary to develop for UV drying machine of pad printing process, to do a little bit small size