Explanation of UV adhesive white after curing causes and solutions

UV adhesive as a fast curing adhesive, in the process of use may sometimes appear after curing the phenomenon of white, which may affect its appearance and performance. In this paper, we will analyze the reasons for the whitening of UV adhesive after curing, and put forward the corresponding solutions to help users better cope with this problem.

一、Analysis of the causes of whitening

1. Uneven irradiation of ultraviolet light: UV adhesive curing process depends on the irradiation of ultraviolet light, if the ultraviolet irradiation is not uniform, some parts may not be fully cured, resulting in whitening phenomenon.

2. The influence of oxygen: UV adhesive curing process is susceptible to the influence of oxygen, especially in the case of thicker coatings, oxygen may penetrate into the coating, resulting in incomplete curing, resulting in whitening.

3. Material incompatibility: UV adhesive is incompatible with a particular substrate may also cause whitening after curing. This may be due to a chemical reaction or a mismatch of physical properties.

二、.Solution

1. Uniform irradiation: Ensure that the UV light source is uniformly irradiated, either by adjusting the position of the light source or by using multiple light sources to improve the uniformity of the UV light and to ensure that the entire coating is adequately irradiated.

2. Nitrogen protection: Use nitrogen to protect the environment and reduce the effect of oxygen during the curing process of UV adhesive. This can be achieved by injecting nitrogen into the curing equipment or using nitrogen airflow during the curing process.

3. Optimize the formula: According to the specific application requirements, you can adjust the UV adhesive formula, select the UV adhesive more suitable for specific materials. UV adhesive with better compatibility with the material helps to reduce the possibility of whitening.

4. Reduce the thickness of the coating: When applying UV adhesive, reducing the thickness of the coating can reduce the possibility of oxygen penetration and improve the curing effect of the entire coating.

5. Post-treatment measures: For the cured but whitening situation, you can consider the use of post-treatment measures, such as UV irradiation again or use other curing means to improve the transparency and uniformity of the coating.

UV adhesive whitening after curing is a common but solvable problem. The risk of whitening can be effectively reduced by taking appropriate measures, such as ensuring uniform irradiation, using nitrogen protection, and optimizing formulations. In practical applications, choosing the right solution according to the specific situation not only helps to improve the curing effect of UV adhesive, but also helps to ensure the quality and appearance of the product.