The colorant is collectively referred to in chemical stability of acid, base, solvent, and chemical pharmaceutical system. Due to many types of plastics, there are also a lot of coloring agents, and when plastic products are industrial and daily applications In the case of a variety of requirements, it will reflect the importance of the toner chemical resistance. Due to too much requirements, pigment vendors are not possible to detect each use. With international standards, the pigment supplier only detects acid (HCI, H2SO4, HNO3), alkali (NaOH, Na2CO3) nature, which covers a broader application area. So in practical applications, especially in the field of packaging, tests are inevitable to measure the chemical stability of each possible combination.

Chemical stability of pigments with plastic masterbatch:

First, the acid-resistant, alkaline introduction of the pigment of plastic masterbatch

Many products need to use color plastic packaging materials such as medicines, food, perfume, household detergents, chemicals, etc., which are numerous. Due to many products that need to be packaged have weak acid or weak alkaline, in these cases, it is difficult to predict because there are too many mutual reactions that may occur. One possibility is a chemical reaction between the packaging material (plastic / colorant / additive) and the packaged goods. Another-species is the pigment migrated by the solvent in the packaging product. Therefore, storage stability detection must be performed. Battery This type of container is basically used for packaging of acid batteries. They can have different colors, mainly black, gray and yellow. The pigment is required to have good acidity resistance. Many plastic containers are used to store and transport chemical raw materials, and the plastic container is mainly blue, requiring pigments to have good acid, alkaline. The wire and cable sheath is to solve the flame retardant, often use magnesium hydroxide and aluminum hydroxide, during high temperature molding, the pigment can satisfy the hard-resistant alkaline, except for a small amount of inorganic pigments, very few organic pigments can be used. The pigment is used for the treatment of 20C, 20% sulfuric acid or 100c, 5% sulfuric acid and 5% NaOH in wet or dry spinning.

two. Solvent-resistant introduction to pigments with plastic masterbatch

In order to mitigate the weight of the car, the use of plastic materials in the automotive industry is increasing year by year. Many car parts are made of plastic, which must be capable of flavoring, lubricating oil, gasoline, and refrigerant at higher temperatures. Due to these harsh requirements, most components are carbon black colored. EVA plastic sole materials need to be cleaned with solvent before the adhesion, such as the dissolved solvent resistance in EVA plastics, which will be squeezed from the solvent and contaminated other colors.

three. The oxidation resistance of the plastic masterbatch is introduced 1. Many household disinfectants for cleaning the fabric also contain peroxides. 2. Chemical fiber fabric is in the water wash or dry cleaning process, the coloring fabric cannot migrate and fade. For water washing, the colorant should have a bleach (peroxide) property. It should have solvent resistance to dry cleaning colorants. 3. The heat resistance test of the colorant is related to the chemical resistance, typical examples of polyamide (PA). Several colorants can withstand higher temperatures, although they can withstand higher temperatures when used for other varieties of polymers. It cannot be used in polyfeita. The unstable cause of colorants in polyamide is the reduction effect of resin melting. In this case, the use restriction is not only heat resistance, but also the chemical resistance of the colorant at the melting temperature of the polyamide.