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Knowledge of fluorescent pigment
Plastic processing problems
One of the most common process problems in using fluorescent pigments is the occurrence of sticky rollers. It is generally believed that the sticking roller is caused by the decomposition of organic molecules such as oligomer and fluorescent dyes in the resin and the precipitation of the fouling screw and other metal components from the polymer.
In the face of this problem, manufacturers and manufacturers of masterbatch colorants have adopted corresponding measures. The former, from the molecular weight of the colorant, attempts to change the distribution of molecular weight, on the other hand, attempts to reduce the low molecular weight components, thereby reducing the chance of decomposition and precipitation. Additive masterbatch manufacturers and suppliers to jointly develop additives to reduce the sticking phenomenon.
The use of fluorescent pigments may also have problems with thermal stability and matching with resins. Fluorescent pigment manufacturers are always trying to find ways to improve processability.
Application of fluorescent pigment in coatings
Fluorescent pigments can also be applied to a variety of coatings, such as textiles, printing paste, traffic signs, coatings, advertising coatings, toy coatings, bicycles, paint and various inks. According to the properties of different coatings on pigment requirements are not the same, currently the world's fluorescent pigment producers account out of the performance of different fluorescent pigments to meet the market demand for performance and price, mainly including solvent resistance, weak solvent resistance, strong solvent type, size three is generally fine, but because the resin package and use different technology, there is a great difference in the application. No solvent type is mainly used for water soluble products, were dispersed in water, lower grades, narrow application range; weak solvent resistance is mainly used for low grade inks and coatings, quality requirements of products is not high, not long period storage requirements; quality is the best solvent resistant type, manufacturing the process of fluorescent pigment microsphere, has excellent solvent resistance and permeability, especially suitable for the requirements of long storage time and place in a strong solvent, at the same time because of its opacity, good hiding power and weather resistance than ordinary fluorescent pigment better.
In the coating industry, the selection of raw materials is also to the direction of environmental protection. Previously, in the printing coating, most domestic manufacturers are using formaldehyde containing fluorescent pigments, and now not only in the export products, but also in some domestic products are not required to contain formaldehyde. Therefore, more and more manufacturers choose formaldehyde free fluorescent pigments.
The use of fluorescent pigments and related colorants in plastics, coatings, and inks has been gaining momentum for the past several centuries. Efforts continue to be made to develop products with better heat resistance, light resistance, low viscosity, high strength and high transmittance. With the improvement of these properties, fluorescent pigments and related colorants will be used in a wide range of plastic products.
The growing domestic fluorescent pigment market, especially China's plastics, paint, ink and other industries demand for various properties of fluorescent pigment increased, including the environmental protection type fluorescent pigment products demand growth, provides a broad space for development of industrial Chinese own fluorescent pigment. With the rapid progress of fluorescent pigment production technology and R & D capability in recent years, our country's fluorescent pigments have also moved to the world more quickly and participated in the international competition.