membrane switch ink composition analysis, membrane switch ink is generally composed of pigments, adhesives, fillers, additives and so on. Pigment plays an important role in membrane switching ink, which directly affects some of the performance of ink. Pigments are highly disperse pigments, black or white powder, insoluble in water and organic solvents. Inorganic pigments are Non-ferrous metal oxides or certain metal salts that are insoluble in metals. They are divided into natural inorganic pigments and artificial inorganic pigments. Natural Inorganic pigments are mineral pigments, organic pigments are colored organic compounds, can also be divided into two categories: natural and synthetic.
Now, synthetic organic pigments. There are many kinds of organic pigments, the color integrity, performance is better than inorganic pigments. The pigment content used in ink is very high, especially the color, dispersion, light resistance, transparency, and so on. Pigment color should be close to spectral color, saturation should be as high as possible, Magenta, Cyan, yellow ink pigment transparency should be as high as possible. All pigments not only need water resistance, but also need to be quickly and evenly separated from the binder, so that the amount of oil-absorbing pigments will not be too large, With Alkali, acid, alcohol and potential resistance.Adhesive, adhesive is usually called inking oil. It is the main component of the membrane switching ink, which disperses the pigment, endows the ink with proper adhesion, fluidity and transfer performance, and makes the pigment fixed on the printing surface through the film forming after printing. ADHESIVES can be made from a variety of substances, such as dry vegetable oils, most of which can be used to make ink adhesives, mineral oils for adhesives, solvents and water, and various synthetic resins for adhesives. The rheology, viscosity, neutrality, acid value, color and LUSTRE, water resistance and printing performance of ink mainly depend on the adhesive, the same pigment, with different adhesive, can be made into different types of ink, with different paint, can Be made into the same kind of adhesive. Made of the same type of ink, because it can not change the basic performance of ink, so membrane switch ink quality, in addition to pigments, mainly depends on the binder. The packing is white, transparent, translucent or opaque powdery material. Most of it’s filled in. Appropriate use of some fillers, not only can reduce the amount of pigment, reduce costs, but also can adjust the membrane switch ink performance, such as thickening, liquidity, and improve the formulation design sensitivity. Additives are used in the manufacture of membrane switching inks and in printing to improve the performance of the ink itself and some additional information. According to the basic composition of ink, some properties still can not meet the requirements, or due to changes in conditions, can not meet the use requirements, must participate in a small number of auxiliary data processing. Such as: desiccant, anti-desiccant, diluent, degumming agent, plasticizer and so on.
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