The unstable glossiness of PU color paste may be related to the following reasons:
Raw material quality: The glossiness of PU color paste is greatly affected by the quality of the raw material. If low-quality raw materials, such as resins or pigments, are used, it may lead to unstable glossiness of the color paste. It is recommended to use high-quality raw materials to ensure the stability of the color paste.
Formula ratio: The formula ratio of the color paste also affects the glossiness. If the ratio is incorrect, such as the ratio of resin, pigment, or additive, it may lead to inconsistent glossiness of the color paste. When preparing the color paste, it should be ensured to mix and stir according to the correct formula.
Mixing process: The process of mixing color paste is also important. If the mixing is uneven or the time is insufficient, it may lead to uneven distribution of pigments or additives in the color paste, thereby affecting the stability of glossiness. During the mixing process, it is necessary to ensure sufficient stirring and mixing to ensure the uniformity of the color paste.
Processing conditions: The temperature, pressure, and time during the processing of color paste can also affect the glossiness. If the processing conditions are unstable or improperly controlled, it may lead to unstable glossiness of the color paste. During the processing, it should be ensured to use appropriate temperature, pressure, and time to obtain stable glossiness.
In summary, the unstable glossiness of PU color paste may be caused by factors such as raw material quality, formula ratio, mixing process, and processing conditions. In order to achieve stable glossiness, it is recommended to use high-quality raw materials, mix according to the correct formula, and ensure appropriate processing conditions.
