In recent years, with the development of the economy, the packaging of various commodities has increased rapidly, which has led to the rapid development of flexible packaging. The new technologies and products that people want are constantly improving and innovating. The ink and glue viscosity automatic tracker was born in people's urgent expectations and requirements. The following is an analysis of the effect of the viscosity of the ink and glue in the actual production process on the product quality.
1. The control of ink and glue viscosity in actual production
In the printing and compounding process, the control of viscosity is the key, especially in the high-speed output gravure printing and compounding of 80-140 m / min. With the actual progress, the solvent is continuously volatilizing, and the viscosity is gradually increasing. , The liquidity becomes worse. Although there are 3 # measuring cups and stopwatches 5 to detect the viscosity value when mixing ink and glue, it is difficult to control the dynamic time changes during printing and compounding by manual methods, and it is even more difficult to control the accuracy of the amount of solvent added continuously. In production, when printing and compound viscosity increase, the solvent is added manually to dilute the viscosity with a kettle. The more the number of additions, the greater the color change after printing, the poorer the uniformity of the compound, and the firmness will also decrease, thereby increasing the rate of return and scrap.
Second, the effect of changes in ink and glue viscosity on product quality
Whether the viscosity of ink and glue is properly controlled is directly related to most quality problems such as the transfer of ink pigment, printing plate, gloss of printed matter, adhesive fastness, compound uniformity and firmness. Caused by inks with large viscosity values: printing scrape is not clean, poor net transfer, poor leveling, residual solvent, trailing, lines, printing plate and blade life is short. Large viscosity value of compound glue will also cause poor transfer, poor leveling, residual solvent, poor transparency, poor peel strength, and poor heat seal strength, which seriously affects the quality of production, yield and work efficiency.
3. Problems caused by changes in the viscosity of inks and glues
In the ink and glue market, the unit price of ink and glue is based on the quality, viscosity and concentration of the ink and glue to measure the overall cost and price. Because printing companies cannot identify these indicators, it makes it difficult to purchase ink and glue. This directly affects printing and compound costs.
4. The transfer of ink and glue is mainly related to the viscosity. The greater the viscosity, the worse the transfer efficiency.
Because the role of the solvent is a solvent resin or additives, additives, etc., giving fluidity makes the ink and glue easy to disperse. When the viscosity is too high, it is in a supersaturated state, and the fluidity is poor. It cannot be dispersed uniformly, but appears in clusters, which is easy to pile up together. In this way, the ink and glue cannot smoothly enter and exit the mesh, let alone transfer, so it is easy to produce blocking phenomenon.
5. The relationship between the viscosity change of ink and glue and firm reading
If the compound viscosity of ink printing and glue is too small, it means that the solvent content of the ink and glue is too much, and the components such as resin and pigment are relatively small, so that they cannot form a smooth layer during drying, so they are white and dark. Matte, lack of gloss. Because resin is the main material for the firm adhesion of plastics, the fastness of pigment viscosity is related to the viscosity of ink printing. Choose an appropriate viscosity and the fastness of pigment adhesion. Many solvents in the glue will also cause poor compounding, generate bubbles, and poor firmness. Generally, the coating concentration is controlled at 20% -30%, and the viscosity is preferably 16-20 seconds.
Six, the relationship between the control of ink and glue viscosity and the remaining ink and glue
In production, in many cases, the viscosity of ink and glue and the addition of solvent cannot be constant, so that the remaining times of ink and glue increase and the number becomes larger. It's a pity that the remaining ink was thrown away, and it's not easy to use anymore. Their performance has been changed. The color becomes darker, the leveling property becomes worse, there are impurities, and the air is not cleaned and generates bubbles. If the glue is not properly stored, it will solidify and the compounding firmness will deteriorate, which has a great influence on the printing quality. If a viscometer is used to accurately control the viscosity of ink and glue and the amount of solvent added, the remaining number and quantity of ink and glue will be greatly reduced.
7. The relationship between the viscosity change of ink and glue and production management
In the actual production of the printing house, the workers' idea is to exchange the minimum remuneration for the maximum labor. If the management is not good, the workers add solvent for a long time in the printing and compounding process, and some do not add solvent at all. This not only wastes ink and glue, but also creates pattern distortions. The compound uniformity and firmness are poor, giving the company direct Caused economic losses. Especially when the printed product needs to be reprinted after several months, because the viscosity value of the first printing cannot be recorded with accurate data, the operator estimates the viscosity value range based on experience, and the error is large. When the concentration and viscosity of the glue, it is necessary to conduct multiple proofing and proofreading, which wastes both time and labor and raw materials.
8. Control the viscosity of ink printing and glue compound to ensure product quality
XX Co., Ltd. is a company specializing in plastic printing materials for 15 years. Over the years, it has been continuously exploring and repeatedly experimenting and successfully developed the ink and glue viscosity automatic tracking regulator. This product is based on the principle of ink and glue flow circulation, automatically tracking the viscosity changes of ink and glue, adjusting the amount of solvent added to achieve the set ink glue viscosity value. Make it stable within 0.5 seconds. The product controlled by the viscosity automatic tracking regulator can reproduce the accuracy and compound of the original pattern at any time when reprinting and compounding by recording different printing, compound viscosity and production process setting values ​​each time Effect, save time and labor, and improve the quality of the product so that the product pattern is clear, the layer is clear, and the color is consistent.
Pull and decoration are the cord's functions.
Blinds Cord
WUXI MIFUN INTERNATIONAL TRADE CO.,LTD , https://www.mifunblind.com