Implicit dynamic specialty printing film technology – special printing, hidden video dynamic – screen printing industry, especially web
Special printing of textiles, whether in fabric printing fabric or clothing in the garment printing on-chip, developed rapidly in recent years, mainly due to three reasons: first, with the continuous improvement of living standards, has not only style clothing new color person can, but wearing the same time use, but also a strange sense of unpredictable or unusual freshness. Second, with the new, emerging new materials so that the new technology and new materials in a combination of organic textiles. Third, as the textile printing market, fierce competition among companies to develop special effects printing products to gain market.
Special textile fabric printing is the final product will have some special effects, collectively referred to as specialty printing Textile printing. For example, in textile production color printing effects called color printing pattern, printed in the textile type known as imitation pearl flower Jane printing, textiles printed in three-dimensional projections of flowers such as foam stamps and so on.
Of special printing press printing process, most of which are direct printing, press printing paste on the vast majority of similarity in pigment printing paste, the special printing process is relatively simple, but it's material and technical content of slurry high, it can in a variety of fabrics (fiber) on the stamp. According to the development of specialty printing and special effects of the classification can be divided into six categories, shown in Table 1.
Which implicitly dynamic special printing film more acceptable for people of special printing, because it has a very intuitive visual effects, its products and very new and unique. Such as textiles with flower pattern on the ambient temperature, humidity or changes in light color shows different color printing; and if in the dark to produce luminous crystal bright flower print; and if the fabric in the dry state when no flowers, and in the wet when the floating flower show reflects printing; and if the fabric can be used in the white coat color pen to write a letter to write cream printing of water; and if printed fabrics in light of the irradiation can reflects the return of bright shiny reflective logo printing, etc.. Implicit dynamic specialty printing film there are several changes in implicit shadow
L, color printing Flower color printing is a typical representative of hidden copies, prints as temperature, sunlight and humidity simultaneously change its color change, so medicine can be divided into thermal color printing color, color and humidity photosensitive color.
1? 1 thermochromic printing Color printing, also known as thermal printing temperature change, the present thermochromic coatings for textiles are used thermochromic organic dye, is to be processed into organic dye thermochromic microcapsules, then by printing methods, printing to fabric up.
(1) thermochromic composition of organic dyes
Thermochromic organic dye from the leuco dye, reagent and sensitizer (desensitization agent) of three parts, its chemical composition and role of the Table 3.
Organic thermochromic system at least by the dye, reagent and sensitizer of three parts, three of the compatibility is good, in order to achieve significant changes in results, dye lactone of open and closed loop to keep balance, The activation energy of the molecular rearrangement should be very low, so have high thermal sensitivity. Dye, reagent and sensitizer thermal change process can be Figure 1.
(2) thermal color printing process and prescription:
Process: thermochromic coating in the textile printing is mainly used on the micro-capsule technology, therefore, the printing process is basically the same as ordinary pigment printing process, the process: printing (100 mesh) drying (100 ~ (3) baking (150 , 3min) finishing finished product.
1? 2 color printing photosensitive
Photosensitive color printing, also known as optical variable printing, first used in optical recording systems, storage of information. For example, A is a colorless dyes by ultraviolet radiation, the molecular ring structure after the phthalocyanine dye B, blue, and dye B and then exposed to visible light is divided again into a colorless dye A, the above-mentioned reactive can be seen, according to UV discoloration is due to dye molecules in the structure of the chain occurred in the open-loop, so that before the color change.
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