The color boxes used for product packaging and the packaging boxes for various commodity packaging are mostly made of ivory board. After slitting, printing and subsequent processing, it becomes our product packaging box.
Today, when material enjoyment is increasingly valued, people have higher and higher requirements for the quality of packaging cardboard. Ivory board (also known as coated white cardboard or FBB) is a high-grade packaging material, and its exquisite appearance has also become the goal of people's pursuit. However, the yellowing phenomenon of the coated whiteboard paper during use seriously affects the appearance of the outer packaging. The yellowing of white cardboard refers to the phenomenon that the whiteness of the product will decrease to a certain extent after a certain period of storage or exposure to sunlight.
The latest research results show that the phenomenon of yellowing is that the surface material of the folding box board reacts with oxygen in the air, which changes the chemical structure of the surface material, thereby affecting the visual effect of people. The degree of oxidation determines the severity of yellowing.
The factors that affect the yellowing of white cardboard mainly include the following aspects: coated whiteboard base paper, fluorescent whitening agent, color pigment, coating adhesive, etc. Improve the process conditions of base paper production, select high-quality fluorescent whitening agents, color pigments, adjust the optimal dosage, and scientifically determine the best combination of adhesives, which can effectively reduce the yellowing phenomenon of coated whiteboard paper; Additives, such as nano-silicon-based oxides, chemical products such as UV absorbers and antioxidants, will also reduce the yellowing phenomenon of coated whiteboard paper; strengthening the production control of whiteboard paper and the prevention of all aspects of packaging and storage conditions are also the effective way to solve the yellowing of white cardboard.
Control all the processes involved, standardize and streamline the operation, and the quality of the coated white card will be first-class.
Post time: Sep-05-2022