What are the factors causing fading of plastic coloring products packaging materials?
Uncover the crucial factors behind fading plastic colors in packaging. Explore how sunlight exposure, environmental conditions, and chemical interactions influence color longevity. By understanding these key elements, you can enhance your product packaging for improved durability and visual appeal. Dive deeper to learn how to safeguard your packaging's aesthetic integrity!
What are the factors causing fading of plastic coloring products packaging materials? Is the packaging material of plastic colored products fading? These factors have a significant impact!
Light resistance of coloring agents
The light resistance of colorants directly affects fading, and outdoor products require high light resistance levels!
The light resistance of resin is also crucial, as ultraviolet radiation can cause the resin to fade. Adding light stabilizers can improve this!
Heat resistance
Heat resistant pigments are not prone to thermal weight loss, discoloration, or fading at processing temperatures.
Inorganic vs. Organic Pigments
The components of inorganic pigments are metal oxides and salts, with good thermal stability and high heat resistance.
Organic pigments undergo molecular structure changes at high temperatures and are prone to decomposition.
Antioxidant activity
Some organic pigments gradually fade due to the degradation of large molecules or other changes after oxidation, either by high-temperature oxidation during processing or by oxidation with strong oxidants such as chromate in chrome yellow. After mixing lake, azo pigment and chrome yellow, the red color will gradually decrease.
Acid and alkali resistance
The coloring agent needs to be chosen carefully! Acid, alkali, and redox resistance are both important. Molybdenum chromium red is resistant to dilute acid but afraid of alkali, while cadmium yellow is not acid resistant. Choosing the right pigment is crucial!
Processing conditions and usage requirements also need to be considered. Pigments, dyes, surfactants... these all need to be selected according to specific circumstances to prevent fading!
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