First, the future development trend of solvent ink
The development of any product will follow a low-level to high-level development model, and ink is no exception. China’s inks have made great leaps in performance and quality from ordinary surface printing inks in the early stages of development to later composite inks in Liyin and even multifunctional general-purpose inks developed by Eagle. Especially in recent years, in addition to the continuous updating and improvement of the quality of ink, the country’s environmental protection requirements for products are more clear, and the development of truly high-quality, low-cost, no harmful residues of multi-functional ink has become an urgent task for ink companies.
Generally speaking, domestic ink development is from benzene ink, to benzene-free ink, to alcohol fat-soluble ink, alcohol-soluble ink, the final development goal is truly environmentally friendly water-based ink.
Second, the development of titanium dioxide
The development of titanium dioxide is a very important basic condition for the development of ink. Every progress in ink quality is closely related to raw materials. With the difference of ink system and the continuous change of system, the matching pigments, solvents and additives must also be Make adjustments accordingly. Taking Eagle ink as an example, in the early stage of development, polyamide resin was used to produce surface printing ink. At that time, domestic titanium dioxide was basically anatase. Although the quality of anatase titanium dioxide is not very stable, it can meet the original Ink requirements. Later, Eagle Ink independently developed a benzene-soluble composite ink based on chlorinated polypropylene resin for the first time. This ink has higher requirements for color, leveling, weather resistance, etc. At that time, in addition to solvents in China Without suitable materials, the ink materials of the Eagle are imported directly, including rutile titanium dioxide. In recent years, domestic rutile sulphate titanium dioxide has gradually matured, and its products have been widely used in inks. However, in order to improve hiding power and printing adaptability, some high-grade inks still use imported chlorinated titanium dioxide, such as DuPont and Ishihara. , Meililian, etc. Therefore, domestic titanium dioxide companies should accelerate their development and catch up with or surpass imported products as soon as possible to look forward to occupying a larger market share.
3. Requirements for titanium dioxide in ink production
1. Follow the principle of low viscosity and high concentration ink: With the improvement of domestic printing equipment, the printing speed is gradually increased, and the higher the printing speed, the lower the viscosity adjustment of the ink, and the low viscosity and high concentration ink is suitable for this 1. Development requirements. In addition to the adjustment of the main resin and additives, the oil absorption of titanium dioxide is also a key factor in the viscosity of white ink. Under the condition that the color density is constant, try to reduce the oil absorption as much as possible, which is conducive to the preparation of high concentration and low viscosity ink.