1. Hand-made bronzing paste
1. Hand-made flat bronzing paste: It is an organic combination of acrylic emulsion and tackifying resin emulsion formed by copolymerization of acrylate with special properties. This improves the compatibility and stability of the emulsion, increases the peel strength of the emulsion, and enables the bronzing paste to bromide at low temperatures. So many materials Shanghe Printing Factory is also called cold bronzing paste. Because the bronzing paste can quickly form a glue film at a temperature of 35 ° C to 120 ° C, it is by taking advantage of the strong initial adhesion of the resin emulsion itself to bond the bronzing paper to the bronzing paste. The characteristics of the bronzing paste are: the bronzing paste is thin on the sizing, soft, flexible and non-shrinking, which is especially suitable for manufacturers who do line bronzing and pursue the feel.
2. Three-dimensional bronzing paste: It is the product of acrylic emulsion or EVA emulsion grafting technology. The biggest feature of the three-dimensional bronzing paste is the high solid content, which will not cause unevenness during use. The ordinary screen (80-120 mesh / im) that is usually used can be used to achieve the required film thickness through multiple printing. 3D printing effect, then adjust the working pressure and temperature of the transfer machine to hot stamping, forming a three-dimensional three-dimensional stamping effect.
3. Mirror surface bronzing paste: It is mainly a kind of bronzing paste synthesized by adding hot melt powder of EVA polymer copolymer. The appearance of the mirror bronzing paste is milky white, because the bronzing paste contains a large amount of hot melt powder. When printing the substrate, it is easy to fill the uneven surface of the substrate. After the hot stamping, the surface of the bronzing film is very smooth and bright , The reflection effect is very good, there is a mirror effect. So someone called mirror bronzing paste. The mirror bronzing paste contains hot melt powder, so during the hot pressing process, the bronzing temperature depends on the dissolution temperature of the hot melt powder to achieve good washability; this is also the reason why the mirror bronzing paste feels harder than other bronzing pastes.
2. Mechanical printing bronzing paste
1. Mechanical flat printing bronzing paste: different from manual flat bronzing paste. The manual surface bronzing paste pursues a large initial surface adhesion, while the mechanical printing bronzing paste requires low initial surface adhesion. After the cloth is printed, the cloth must not be stuck with cloth wool, otherwise it will affect the final quality of the product. The process of mechanical flat printing bronzing paste: fabric sizing → drying → cloth collection → laying cloth → bronzing → molding. The mechanical flat bronzing paste has a good feel due to the small amount of sizing, but the flatness of the bronzing is not very good, and the brightness is poor, so some people also call frosted bronzing.
2. Mechanical three-dimensional bronzing paste: Because of the particularity of mechanical printing, in order to produce a 3D three-dimensional bronzing effect, the mechanical printing machine department can repeat printing as many times as manual printing, so when setting the production of mechanical printing bronzing paste formula, in Microcapsule foaming powder is added to the production process. Using the working principle of microcapsule foaming powder, the microcapsule foaming powder plays a key role in the overheating process of printing, which can not only meet the three-dimensional three-dimensional process requirements, but also solve the process requirements of hot pressing for collecting and releasing cloth. The disadvantage of mechanical three-dimensional bronzing paste is that it has poor elasticity.
3. Mechanical special bronzing paste: As we all know, many mechanical printing are mainly active printing. In order to better achieve other effects of printing, this year, in the active printing, coating bronzing process was added. The general paint printing is dry and wet printing process, the PH value is neutral, and the active printing is wet and wet printing process, the PH value is not neutral, so there are new requirements in the market. The special mechanical bronzing paste is required to solve the problem of resistance to PH on the original basis. At present, this printing process has been successfully applied in mechanical printing plants, which not only saves time, but also saves production costs and meets the needs of development.
Third, craft bronzing paste
1. Cloth bronzing paste (blanket process bronzing paste): The range of resin emulsion selected for cloth bronzing paste is large, and acrylic emulsion, tertiary vinegar emulsion and EVA emulsion can be used. Because in the application, after the fabric crafts are hot stamped, they generally do not require washing resistance, and the hand feel requirements are not very high, but they require easy film formation and strong hiding power during printing, especially for dark fabric crafts. It can cover the fleece, and it is easy to block the fleece fabric hair when reprinting, which meets the requirements of the subsequent process, so that the gold foil paper can be easily transferred to the paste.
Therefore, when producing fabric bronzing paste with resin, a certain amount of inorganic minerals need to be added to increase the hiding power. At the same time, it must be kept at a low temperature to be able to be pressed successfully (pressing temperature is generally 30 ° C ~ 45 ° C, can keep other parts not (Upper hot, to maintain the cleanliness of the fabric picture).
2. Paper art bronzing pulp: mainly choose vinyl acetate emulsion or EVA emulsion for use. This kind of emulsion has good abrasion resistance to paper art, good adhesion, and overall leveling, so it is particularly suitable for use on paper. When printing or painting, the problem of tension on the surface of the paper and the problem of fluidity of the paper are well solved, so that the bronzing foil on the paper exhibits a smoother and more luxurious effect.
With the emergence of a large number of new products, bronzing paste is also constantly expanding. In any case, the printing of the bronzing paste must be uniform, the lamination must be smooth, the pre-baking and hot pressing or hot rolling should be controlled at an appropriate temperature and time range to ensure the quality of the finished product. For the silk screen printing technology, it is more textile Commodity added value and appreciation value.
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