The main reasons for the fading of PU pigments include the following aspects:
Lighting: Ultraviolet rays in sunlight are one of the main factors that cause PU pigments to fade. Exposure to strong sunlight for a long time, ultraviolet rays will decompose and destroy the structure of pigment molecules, causing the pigment to lose its original color.
Oxidation: PU pigments may undergo oxidation reactions when in contact with air, resulting in pigment fading. Oxidation changes the molecular structure of the pigment, causing the pigment to gradually lose its original color and brightness.
Chemical reaction: PU pigments may undergo chemical reactions with other substances, such as contact with acids, alkalis, solvents, etc., or be affected by pollutants under special environmental conditions. These chemical reactions can affect the stability of the pigment and cause the pigment to fade.
Poor quality materials and manufacturing process: If you use low-quality PU pigments or improper manufacturing processes, the pigments may be more prone to fading during use. Inferior materials and manufacturing processes may lead to unstable pigment molecular structure, increasing the risk of pigment fading.
In order to avoid fading of PU pigments, the following measures can be taken:
Choose high-quality PU pigments: Choose reliable pigment suppliers to ensure that the selected PU pigments have good stability and durability.
Protect pigment exposure: Try to place PU pigment products in a place that is not directly exposed to sunlight to reduce ultraviolet radiation.
Regular cleaning and maintenance: Regularly clean and maintain PU pigment products to prevent dust, dirt and other substances from affecting the pigment.
Use anti-ultraviolet coating: For PU pigment products that require higher protection, you can consider coating a layer of anti-ultraviolet coating on the surface to reduce the exposure and damage of ultraviolet rays to the pigment.
In short, the fading of PU pigments is caused by factors such as light, oxidation, chemical reactions, and inferior materials and manufacturing processes. By choosing high-quality pigments, proper protection and maintenance, you can reduce the risk of PU pigment fading and prolong its service life.
