I、Powder coatingsHow to make it into a paste-like consistency?
Powder coatings are solid-state coatings in powder form, typically dispersed with air and applied to the rim surface. These coatings are usually applied using electrostatic spraying. However, if you want to convert powder coatings into a paste-like consistency, it is very simple; you only need to add an appropriate amount of water.
Please note that powder coatings generally do not need to be mixed into a paste before use. The following is the typical process for using powder coatings:
1、Softening Process: After absorbing a certain amount of heat, the resin in the powder will become viscous and soften due to heat absorption.
2、Melting Process: once the resin in the powder absorbs a certain amount of heat, the active chemical bonds within the resin break, causing the powder to exist in a molten state on the product surface. This stage occurs very quickly.
3. Leveling Process: When the powder exists in a molten state on the product surface, it flows from a continuous and uneven surface to a relatively smooth and flat surface, which is the leveling process.
4、Curing Process: After melting, the active chemical bonds in the powder coating react through cross-linking, resulting in a significant increase in molecular weight, and a corresponding increase in viscosity, eventually solidifying into a hard coating film. This process is the curing process.
What are the techniques for color mixing powder coatings?
1、According to the production method
The production methods can be categorized into natural pigments and synthetic pigments. Natural pigments primarily consist of "jingqing" (a specific type of pigment), which are used less frequently. Synthetic pigments include titanium white powder, iron oxide series pigments, and other pigments, offering a wide range of color options.
2、based on function, adjust the mixture.
based on their function, these can be categorized into: coloring pigments, anti-corrosion pigments, conductive pigments, and body pigments. Functionally similar pigments can be mixed together to expand their functionality.
3、According to the degree of color presentation
Due to the differences in the overall structure, chemical composition, and morphology of pigments, the final color presented to the eye is also different. Carbon black is also widely used in our coatings. Generally, as the particle size of carbon black decreases, its darkness increases, leading to increased light absorption and reduced reflection, which makes it appear darker.