Pigment gives ink color, and binder supplies ink with necessary transfer and drying properties. Color performance, flow performance and drying performance are the most basic and important performance of ink. In addition to the main agent, there are also various additives as additives to improve the performance of the ink, such as printability and so on. Taking OPP system ink as an example, this kind of ink has six requirements for organic pigment.
Pigment is an important factor to determine the quality of gravure ink. There are two factors that determine the quality of gravure ink: 1. The choice of raw materials. Raw materials are the basic elements of ink. The selection, matching and quality of raw materials are the fundamental factors to determine the quality of ink. ② Combination of raw materials. Ink is a multiphase dispersion system. In ink, there are interaction between liquid medium materials, namely liquid-liquid relationship; interaction between pigment particles, namely solid-solid relationship; interaction between liquid-phase medium materials and pigment particles, namely solid-liquid relationship. Among them, pigment is also an important factor to determine the combination effect between ink raw materials, and the selection of pigment is also important.
Opp series inks are specially designed for the gravure printing of biaxially oriented polypropylene film. They are suitable for all kinds of gravure printing from low speed to high speed. This kind of ink print has clear and complete dot, full level, bright color, strong adhesion of ink film and high composite peeling strength. It is applicable to biaxial tensile polypropylene film, and can be used for printing beautiful color composite film food packaging, daily necessities packaging, industrial packaging and OPP plastic advanced picture books. Due to the application reasons, OPP system ink has the following requirements for organic pigments: 1) gloss: due to the improvement of printing gloss requirements, the requirements of pigment gloss are also improved. 2) Dispersibility: dispersion is directly related to the stability of ink performance, is a relatively important index, generally related to the wettability of pigment, particle size, crystal size. 3) Physical and chemical properties: printing materials are used more and more widely, so there are more and more requirements for the physical and chemical properties of pigments, such as light resistance, heat resistance, solvent resistance, acid and alkali resistance, migration resistance and so on. The organic pigments used in ink are mainly azo pigment, phthalocyanine pigment and lake pigment. 4) Color: pigment is the hair color part of ink, first of all, it is required to be bright, bright and well saturated. 5) Coloring power: the pigment coloring power directly affects the amount of pigment in the ink, and the pigment mixed with white material is easy to fade, the coloring power is weak. In order to achieve the effect of less ink consumption and fast drying, the pigment with strong coloring power should be selected. 6) Covering power: covering power refers to the ability of pigments to cover the background color. Whether the ink can have the covering power depends on the ratio of the refractive index of the pigment and the refractive index of the binder. When the ratio is 1, the pigment is transparent. When the ratio is greater than 1, the pigment is opaque, that is to say, it has covering power. Different prints have different requirements for the covering power of pigments.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
We uphold the integrity of cooperation, good quality, good service business philosophy, won the industry's approval, products sold to all over the world; welcome friends from all walks of life to inquire, visit our factory to investigate guidance and business negotiations.