Latest development of waterborne acrylic resin in

2022-08-13
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The latest development of water-based acrylic resin in the field of ink

low odor: generally, ammonia is used to dissolve acrylic resin and other water-soluble resins with water. There are two ways to reduce ammonia odor. First, we use odorless amines with poor volatile sales to replace a small part of ammonia, and the addition amount is the most appropriate when the pH is about 8.1. At this time, the resin still has good solubility, and there is almost no ammonia taste. All ammonia combines with the resin to form ammonium salt. If you try to avoid using other amines, you can reduce the residual amount of ammonia, but this will lead to higher viscosity of resin solution or dispersion. This kind of low odor products have hydr deformation measurement index parameters with measurement ranges of o-rez3110 and 4120. It is also possible not to use ammonia or amines at all. These ammonia/amine free inks use a unique system consisting of sulfonated polyester resin and water-soluble acrylic resin

environmental friendly ink: the ink mentioned above can already be considered as environmental friendly ink. To make more environmentally friendly inks, polymerized acrylic resin (reactol aq-39) can be used to replace the commonly used low molecular polymer, and their plasticizing mechanism is the same. The same plasticizing effect can be achieved without performance loss by using only 50% poly (enoic acid) resin. The greatest advantage of polyacrylic resin is that it does not migrate. Low molecular weight polymers usually migrate to a certain extent, thus entering the products from the ink film into the substrate and packaging

high gloss: it is what printers expect to improve the gloss of ink and finishing oil. The new manufacturing method can increase the gloss, while maintaining the following properties: drying speed, transparency, color density, dirty version, heat resistance, one is the surface Rockwell hardness test (dry, wet and ice water) rubbing resistance, resistance (scratch, water, grease, acid). The abrasion resistance is slightly reduced, but it is still acceptable

alkali resistance: composite paper printing can use water-based ink, but it is difficult to obtain good printability, easy cleaning and low VOC by using epoxy resin system. A new water-based polymer creatively uses the technology of mixed application of alkyd and acrylic acid, which can be used for composite paper intaglio and flexo inks, finishing oils and primers. This mixed resin is made by adding a special water dispersible long oil-based alkyd resin to the acrylic lotion, which makes the composite paper ink have outstanding fast drying, adhesion, low VOC, ease of use and excellent resistance to alkali and 409

low water absorption water-based acrylic resin: there is a kind of water-based acrylic resin with less water absorption, which is mainly used for printing "wet" packaging, such as fruit and vegetable packaging. Another kind of acrylic polymer has low moisture vapor transmission, which is used in packaging that does not allow water vapor to pass freely. The former shows good abrasion resistance, dry rubbing resistance and no anti adhesion; The latter is film-forming acrylic acid, which is still in the research and development stage, but it is almost commercialized

adhesion: water based inks can be used to print flexible films, such as PE, PP and polyester films. However, it is difficult to obtain good adhesion and ice water resistance. Eastek 3020 is a unique polymer. It introduces other resins into acrylic lotion particles, which can make the ink produce superior adhesion. This polymer is also suitable for making bonding materials for lamination inks

other drying methods: light curing ink is the development trend of flexographic ink. This drying method brings faster drying speed and better performance to ink and varnish. The most paper packaging materials: packaging paper honeycomb paper, paper bag paper, desiccant packaging paper, honeycomb paperboard, kraft paper industrial paperboard, honeycomb paper core; Recently, flexo water-based UV products have become more and more popular. Due to the use of water-based systems and the reduction of sewage, they are more conducive to health and environmental protection. Except for black ink, their alkali resistance and 409 resistance are very good

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