Review on the development of water-based ink in th

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Review of the development of world water-based inks

as early as the 1960s, people began the research and application of water-based inks. Due to the requirements of environmental protection and the shortage of petroleum raw materials, some developed countries gradually restrict the use of petroleum products to manufacture printing inks. Therefore, people began to study non organic solvent based inks, which made great progress and development of water-based inks. At first, dextrin, shellac, casein, sodium lignate and other substances were mainly used as the connecting materials of water-based inks, and the prepared water-based inks were mainly used for the printing of some low-end products

by the late 1960s, with the development of on-site experts' introduction in the Department of materials, the synthesis technology of rosin and maleic acid modified resin was successful, replacing casein, shellac and other materials, and becoming the main material of water-based ink, which could basically meet the printing needs at that time. However, these primary products still have some disadvantages, such as poor gloss, poor water resistance, experimental method of combustion performance of rigid foam GB 8333 (7), poor adhesion, easy foaming, poor storage stability, etc. Later, the water-based inks produced at this stage were called the first generation products

in the 1970s, due to the oil crisis, the raw materials for printing ink were once again in great tension. At the same time, developed countries legislated to control air quality, restrict the emission of organic volatile compounds (VOC) into the atmosphere, and restrict the content of heavy metals and residual solvents in packaging and printing products with strict sanitary conditions such as food, beverages and drugs. Ink R & D personnel from various countries continued to conduct in-depth research and produced the second generation of water-based inks with solution styrene acrylic copolymer resin as the binder. This product makes up for the poor water resistance and storage stability of the first generation of water-based inks, but it still lags behind solvent based inks in gloss and printability. Therefore, based on the second generation of water-based inks, the ink R & D personnel polymerized acrylic monomers with styrene to develop a polymer lotion resin with core-shell structure and shape structure. This series of resins has greatly improved the gloss and dryness of ink, promoted the development of water-based ink, and continuously widened the competitive field of water-based ink with solvent based ink. Water based ink has entered a new development period

China's water-based ink was first produced in Tianjin ink, which was mainly used for gravure printing at that time. At that time, the intaglio printing ink was improved from benzene solvent to gasoline based solvent, although it was less toxic than benzene based ink, but the flammability was not improved. Therefore, someone proposed to improve gravure printing ink into non-toxic and non combustible water-based ink, which was called water-based ink at that time. Because the ink is mainly composed of rosin acid amine salt, and the connecting material is unstable in the storage of water medium, it is easy to lose light and alkene, and the dryness and water resistance of the ink are poor during storage, which is easy to cause paper shrinkage and other disadvantages. This restricts gravure printing and flexographic printing in our country, and we have to use imported high-grade water-based inks. Due to the high price of imported inks, the printing cost has increased invisibly, which limits the development of China's printing industry

at the end of 2003, Wuhan Institute of modern industrial technology developed a series of water-based inks, which are non-toxic, non irritating odor, non corrosive, non flammable, non explosive, and safe to use. The new ink series can be widely used in the printing of gold and silver cardboard, coated paper, whiteboard, corrugated paper, self-adhesive paper, cartons, paper packaging bags, books and magazines, etc. At the beginning of 2004, Shanghai Meide Fine Chemical Co., Ltd. launched all water-based low-temperature thermosetting ink. The formaldehyde content of this product is below 15ppm, which meets the environmental requirements of textile printing and dyeing in Japan and Germany. Md-1002 all water-based low-temperature thermosetting ink has great hiding power, fine texture, can pass more than 250 meshes of silk, is not blocked, is easy to operate, and the ink color can be mixed at will. The ink has no smell and belongs to high-quality environmental protection products. In the past, thermosetting inks had to be baked at high temperature, which often caused fabric discoloration and deformation, and this all water-based low-temperature thermosetting ink completely avoided the above phenomenon. Generally, the heat treatment of the finished product can be the same as that of ordinary glue printing. It can be baked at 120 degrees for 1 ~ 2 minutes. The ink has excellent tensile properties for knitted fabrics, and the fastness to washing and rubbing is above grade 4. Considering its compatibility and toughening, the guarantee period in a sealed and cool place can be up to 5 years. Its biggest advantage is to save electricity, which greatly reduces production costs. This product is widely used in all cotton, chemical fiber and other fabrics except waterproof nylon cloth

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