Analysis of the cause of the fading of eye drops bottle

Eye drop bottles are a common pharmaceutical packaging in our lives. In order to enhance product recognition, some companies specify the color of the packaging when choosing packaging. But plastic products will fade due to some factors. What are the specific factors?

5ml eye dropper bottle

Heat resistance: The thermal stability of the pigment refers to the degree of thermal weight loss, discoloration and fading of the pigment at the processing temperature; the organic compound pigment will undergo molecular structure changes and a small amount of decomposition at a certain temperature; the inorganic pigment is composed of metal Oxides and salts have good thermal stability and high heat resistance. Actually, we need in the production process. If it is a plastic product that needs high temperature heating, we need to choose a pigment with more heat resistance to ensure that the color changes and fades. Ensure the overall appearance of the product.

Acid and alkali resistance: The fading of the colored eye drop bottle is related to the chemical resistance of the colorant; for example, molybdenum chrome red is resistant to dilute acid, but is sensitive to alkali, and cadmium yellow is not acid resistant. These two pigments and phenolic resins are The colorant has a strong reducing effect, which seriously affects the heat resistance and weather resistance of the colorant and causes color fading.

Light resistance: The light resistance of the colorant directly affects the fading of the product, and the light resistance level is poor. The product will quickly fade during use and the outdoor product exposed to strong light. The light resistance level of the colorant used is an important indicator.

Oxidation resistance: some organic pigments undergo macromolecular degradation or other changes after oxidation and gradually fade. This process is high temperature oxidation during processing, and oxidation when encountering strong oxidants; lakes, azo pigments and After chrome-yellow is used in combination, the red color will gradually fade.

The factors that affect the fading of the eye drop bottle mainly include four aspects: heat resistance, acid and alkali resistance, light resistance, and oxidation resistance. In the production process, corresponding plans are formulated according to the cause of the fading to avoid the phenomenon of fading in the later period.