There are two types of transfer printing: direct transfer and indirect transfer. The direct method is commonly known as pad printing, and the indirect method can only be completed according to its processing method and conditions. Usually, the intermediate is transfer paper. Generally it is cumbersome to make transfer paper, because it is composed of multiple parts such as transfer base paper layer, transfer ink layer, transfer adhesive, etc., it is more expensive to process products with smaller batches, but it requires high printing quality. In terms of products, decoration and decoration, the transfer technology has its unique advantages (such as fast transfer, accurate overprinting, firmness, low scrap rate, etc.). For some textiles, the simple thermal transfer process can solve the problem of making high-cost thermal transfer paper because of the small number. Its raw materials: A paste for printing (mixed with thickener or PTF in proportion to soluble water), low-temperature or normal-temperature binder, and disperse dye (select varieties with lower sublimation temperature, such as Disperse Red 3B, Disperse Yellow 2GG, Disperse Blue 2BLN, etc.), a small amount of urea or color enhancer.
Slurry preparation: first 65 ~ 85 parts of North Korea A helper paste and 35 ~ 15 parts of binder (a total of 100 parts by weight are mixed, then dissolve the disperse dye with a little warm water and pour into A mixed paste of A helper paste and binder In the ratio of addition (1 ~ 4): 100, mix thoroughly, add a small amount of additives (such as fixing crosslinking agent) according to the requirements to enhance the color fastness of the color paste.
Transfer paper printing: use smoother, thicker, non-permeable white paper (above 80g) as the plate, use screen printing method to print the calligraphy and painting patterns on the paper, or use hand-painted method to draw, dry to become transfer paper , Multi-color should be printed after drying, and should be noted that the image printed on the paper is a mirror image (reverse side), so that the pattern transferred to the fabric is positive.
Thermal transfer: The printing fabric is stretched and flattened slightly, and rotated on the printing pad with carpet or artificial leather cloth (the plate is glued firmly with the platen), the printing paper is printed on the cover downward, and the iron or pressure is used. The ironing machine presses for about 20s, the temperature depends on the fabric material, generally about 130 ℃, the iron should move slowly when ironing, so as not to burn the fabric, the printing paper should be kept in place when ironing, and it can be removed after cooling. Detransfer paper, usually this transfer paper can be used continuously for many times.
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