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1. The cushion material (cotton cloth, sponge, cardboard, etc.) under the flat heat transfer machine absorbs the ink moisture during the transfer process, which will cause excessive moisture during the transfer process, resulting in the color of the pattern on the transferred cloth becoming lighter. Or local aerosol or water streak-like interference occurs, so it can be improved by evaporating the moisture on the pad cotton cloth by regular hot pressing before and during the transfer process. If possible, it should be replaced in time. Dry liner material.
2. The printed pattern and the fabric to be transferred should not be damp as much as possible, otherwise the paper will become soft and wrinkled during transfer, especially the roller press, and streaks will appear on the transferred fabric. Moreover, the transfer rate will be lower, the color of the pattern will not be bright, and the outline of the pattern will melt when it is severe. The color contrast between dry transfer and damp transfer will have chromatic aberration. The damper the cloth, the more serious the situation. Due to the above factors, the printed paper (to be transferred) and fabric should be placed in a dry room, and the humidity should be controlled below 60%.
3. The sublimation heat transfer paper transfers under the flat press, and sometimes ghosting occurs. The reason is: the sublimation heat transfer paper is relatively flat during the heat transfer, and will not be bent immediately when heated under the press, and the paper and cloth can Paste flat. At the moment when the hot platen is lifted during thermal transfer, the paper will be adsorbed on the upper platen together with the fabric, and then fall. At this time, the high-temperature sublimation heat transfer paper falling on the fabric will cause a shifted secondary transfer, forming a light-colored ghost.
To prevent ghosting, the following solutions can be taken:
① Reduce the ascent speed. We can adjust the cylinder (or hydraulic cylinder) speed control valve (throttle valve or throttle valve) on the flat heat transfer press, and turn the valve that controls the lifting of the pressure plate down to make the lifting speed of the pressure plate slower. In this way, the paper and cloth are not easy to be sucked up together when the pressure plate is lifted so that the problem of ghosting caused by the secondary transfer can be avoided.
② The four corners are dipped in water. If the sublimation heat transfer paper is smaller than the fabric, you can apply a little water (a small dot, ≤0.5 square centimeters) to the 4 corners of the sublimation heat transfer paper that have no printed patterns, and then cover the fabric for transfer. The place dipped in water during transfer Bonding with the fabric, after the transfer, there will be no misalignment with the fabric to cause secondary transfer ghost images. After the transfer, if there is a burnt yellow in the place where water is applied to the fabric, it can be wiped off with water.
③ Covering method. If the sublimation heat transfer paper is larger than the fabric and can cover the surface of the fabric, then the paper and fabric will generally not be sucked up by the hot pressing plate. This is because the physical reason for being sucked up is the electrostatic effect of the fabric. When the paper covers the fabric, it will be cut off. The electrostatic effect on the fabric will not suck up and fall off the secondary transfer.
④ Use special adhesive sublimation heat transfer paper. The best way to avoid ghosting is to use special adhesive sublimation heat transfer paper. The adhesive sublimation heat transfer paper will be pasted with the fabric during transfer, so that no matter how the paper and the fabric are sucked up and down, the paper and the fabric Always stick together to eliminate the possibility of shifting and ghosting. The use of adhesive paper can greatly improve the convenience of operation and the pass rate of mass production.
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