Introduction of the hottest ink and problems encou

2022-09-21
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Introduction and problems encountered in the application of thermosetting ink

thermosetting ink is a non solvent ink. After heating, it dissolves and plasticizes between powder and additives, infiltrates into fibers and closely adheres to cloth to form a solid film. Due to the current restrictions on the use of polyvinyl chloride, polyvinyl chloride can be replaced by modifiers, and polyvinyl chloride (PVC) can also be replaced by modifiers to make low-temperature thermosetting inks that meet environmental requirements and do not contain PVC. Because the curing temperature of plasticized and unmodified PVC is different, the thermosetting ink produced will be divided into high temperature and low temperature. The curing temperature at high temperature is 180 -190, and the curing temperature at low temperature is 140 -155. The low-temperature thermosetting ink produced by lucky company meets the environmental protection requirements, does not contain PVC, does not contain formaldehyde, and meets the environmental protection standards of export European countries

basic requirements for thermosetting ink

polyester hard board should be used for other boards, and hard board should also be used for table board. Now tempered glass is more common, and the use of silk should be flexibly applied according to the printed pattern. For example, it is recommended to apply fine dot transition to 150 mesh and 250 mesh silk, and thermosetting ink itself has no requirements for photosensitive adhesive. It is recommended to use water and oil dual-purpose printing patterns for ordinary printing. In this way, water or solvent can be used when wiping the plate

three dimensional thick film printing pattern

use special thick film plate and photosensitive adhesive coating to make thick film?. The inside of the plate is coated once, which generally has all the thickness of deformation aluminum processing capacity. The outside is coated once with a round knife according to the pattern thickness or coated many times with an ordinary sizing machine, and then placed in the plate drying box for 40, 50, 60 minutes to dry for exposure. The exposure time must be tested because of the different photosensitive adhesives and the different power of the exposure box. After developing, you must put it in the baking box to dry the water at low temperature. Do not expose yourself to the sun when it is not dry. Temperature is the key to the performance of thermosetting ink characteristics. Therefore, it is recommended to use the heating equipment with good heat preservation and stable heating temperature at the end of the tunnel

special additives for thermosetting ink

thermosetting ink is a very independent printing material. She has her own special printing aids. Such as diluent, thickener, softener, color fixing agent, etc. If there are many additives to be added or reduced during operation, it is recommended to contact the manufacturer first. Listen to the suggestions before operation. Do not add or subtract additives without authorization according to experience, resulting in unnecessary waste and loss

process of thermosetting inks

thermosetting inks are divided into ordinary and special processes according to different printing effects

ordinary printing process generally refers to simple, solid, line monochrome chromatic printing. In addition to heating, this kind of process is no different from ordinary printing process. It is easy to operate without wiping and plasticizing, and its properties are several times higher than those of water-based printing materials

three dimensional printing requires two kinds of thermosetting ink and three-dimensional gel. For example, three-dimensional thermosetting special dry brush thick film. After the printing pattern is plasticized, it has soft hand feel, strong tensile strength, good washing fastness, and clear 90 right angle outline. It is suggested that the thickness of the film thick film plate should be lower than that of the printed pattern. In this way, the printing effect will be better and more ideal if it is printed in two to three times to reach the required thickness of the pattern

the operation of special thermosetting ink effects such as foaming, suede, gravel, wire drawing is no different from that of ordinary thermosetting ink. The effect of printing depends on the amount of additives added

grasp the curing temperature of curing ink

most of the failure cases are due to the failure to grasp the curing temperature and time. For ordinary printing patterns, the curing of high-temperature thermosetting ink generally takes 170-180 timed for 1 minute (the curing of low-temperature thermosetting ink also takes 140-155 timed for 30 seconds-1 minute). For special printing patterns, the curing generally requires pre drying for 80/30 seconds, and then enters the drying channel dryer for 170-180 minutes after the surface is dried (the curing of low-temperature thermosetting ink also takes 140-155 timed minutes). (the white surface cloth is easy to change color at high temperature, the temperature is appropriately reduced, and the time is extended) in addition, the thermosetting ink foaming is suitable for pressing and ironing with the foaming machine, and the surface is smoother

common problems in the operation of thermosetting ink

1. The ink drawing is not clean. If the viscosity is not large, add diluent, 1% can be

2. The edges of the pattern are uneven, the knife is too much, or the ink is too thin

3. The curing temperature of bubbles in the thick film pattern or on the surface is not high enough or the time is not long

4. The surface of the pattern is Matt, there is no tension, it falls off in powder form, and there is no curing

5, The ink changes color after overheating, and the cloth color is absorbed by the ink after sublimation. It is recommended to make a prepress sample test. If the cloth color is easy to sublimate, it is necessary to use anti sublimation thermosetting ink, or contact the ink manufacturer according to the customer's product requirements and GB, ISO, JIS, en and other standards

6, water-based adhesive paste and thermosetting ink are superimposed on each other for printing, but the thermosetting ink

7 can be covered on the water-based paste. The color of water-based printing cannot be mixed with thermosetting ink

8. Thermosetting ink is not a universal ink. Fabrics of different materials should choose corresponding thermosetting ink

9. Changes in climate and environment will affect the viscosity of thermosetting ink, and diluents or thickeners (no more than%) can be added as needed

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