(1) film activation
The drape water transfer film on the surface of the tile to transfer water, graphic layer up, keep the water in the water tank cleaning, and in a neutral state, with the activator in the graphic surface evenly spraying, the graphic layer activation, easy separation and carrier film. Activator is a kind of organic mixed solvent based on aromatic hydrocarbons. It can dissolve and destroy polyvinyl alcohol rapidly, but it will not damage the picture and text layer, make the picture and text be free. The principle of film activation is shown in figure 3.
(2) water drape transfer process
Will need water transfer items along the contour gradually close to the water transfer film, graphic layer will be under the pressure of the water slowly transferred to the product surface, adhesion due to adhesion of ink and printing materials or special coating inherent. Transfer process, the substrate and water coated film laminating speed to maintain uniform, avoid film wrinkles and make graphic unsightly. In principle, we should ensure proper stretching of the picture and text, and avoid overlap as much as possible. In particular, the overlap and excessive overlap can make people feel confused. The more complex the product, the higher the demand for *.
Water temperature is an important parameter affecting the quality of transfer, the water temperature is too low, may cause the dissolution of substrate film, water temperature is too
high, and easy to cause damage to graphics and text, causing deformation of text. The automatic water temperature control device can be used to control the water temperature in a stable range. The mass of the workpiece for the shape is relatively simple, unified, and water transfer equipment special instead of manual operation, such as a cylindrical workpiece, which can be fixed on the rotating shaft, on the surface of the films to rotate to make the graphic layer transfer, drape water transfer process as shown in figure 4.
After the transfer of printing and painting, but also for the following steps. Tidy up
Remove the workpiece from the tank, remove the remaining film, and then rinse off the floating layer which is not attached to the surface of the product. Pay attention to the water pressure can not be too large, otherwise it is easy to transfer the graphic damage. Drying
Remove the moisture on the surface of the product, in order to transfer the ink layer thoroughly drying; in order to increase the adhesion fastness, you can use the hair dryer to dry, or you can put the product in the drying box drying. Plastic products drying temperature can not be too high, generally at 50~60 degrees C, the temperature is too high, easy to substrate deformation; metal, glass, ceramics and other materials drying temperature can be appropriately improved.
Spraying protective paint
In order to enhance the environmental resistance of graphics and text, spray paint on the surface. Spray paint can be used solvent light oil, spray after natural drying or heating drying; also can use UV light oil, ultraviolet curing drying. In contrast, UV curing is more adaptive to environmental protection requirements.
Light oil solvent type and supporting mixed hardening agent, such as water transfer in Dongguan Changan general equipment sales for spraying light oil, is a kind of polyurethane resin for light oil binders, with PU hardener; coating thickness can be controlled by adding diluent improving light oil viscosity; attention can not be dried in an oven. For different printing materials, spraying light oil is divided into three types, that is suitable for plastic materials light oil, flexible materials for light oil and suitable for metal, glass and other non absorbent material light oil.
2. water transfer process
(1) environmental factors
Cleaning the substrate surface is a necessary condition for high quality printing, which is the same for any printing process. To ensure that the substrate is completely bare state transfer; in addition, a clean and tidy working environment conducive to transfer ink layer tightly attached on the surface of the substrate, the transfer effect of floating dust can most
easily in the air.
(2) the activation of water transfer paper
Water transfer paper can be divided into water transfer paper and stripping dissolved water transfer paper, water transfer paper can peel graphic after activation and substrate can achieve separation, transfer; dissolved water transfer paper activated substrate dissolved in water, and in the free state to achieve transfer.
The activation of water transfer paper activation and drape water transfer film is different, it is immersed in water transfer paper, the graphic and separated from the substrate, without special solvent, as shown in figure 5,
The process is simpler.
The specific process is to first transfer the graphic water transfer paper into the required specifications, put into a clean sink, soak for about 20 seconds, so that the mask and substrate separation, ready for transfer.
Water transfer process as shown in figure 6,
Take out the water transfer paper gently close to the substrate surface, with squeegee pressure map technology, so that the water squeezed out, keep the graphic tile in the specified position, natural drying. The stripping water transfer paper, natural drying and then placed inside the oven drying, in order to improve the fastness graphic, drying temperature at 100