The formula and process flow of Pu color paste are as follows:
Raw material preparation
Polyurethane resin: As the main base material, select the appropriate polyurethane resin, and select the hardness, wear resistance and other properties according to the final use and requirements of the color paste.
Pigment: Select the appropriate pigment according to customer requirements or design needs, including color, chroma, UV resistance, etc.
Solvent: Solvents may be needed to adjust the rheology and viscosity of the color paste for coating or spraying.
Additives: Such as leveling agents, thickeners, antioxidants, etc., used to adjust the physical properties and stability of the color paste.
Formula mixing
Resin premixing: Premix the polyurethane resin to ensure that the resin is fully dispersed.
Add pigment: Add pigment gradually according to the formula ratio and customer requirements. Ensure that the pigment is fully dispersed and evenly mixed to avoid uneven color.
Solvent addition: If necessary, add solvent gradually to control the rheology and viscosity of the color paste for subsequent processing and application.
Additive adjustment: Add additives as needed, such as leveling agents to improve surface quality, thickeners to adjust viscosity, etc.
Mixing and stirring
Mixing process: Use stirring equipment to fully mix and homogenize the ingredients in the formula to ensure the stability and consistency of the color paste.
Testing and adjustment: Quality control tests may be required during the production process, such as testing and adjustment of parameters such as color, viscosity, and rheology.
Inspection and packaging
Quality inspection: Ensure that the color paste meets customer requirements and standards through color testing, rheology testing, etc.
Packaging: According to customer needs and end use, the color paste is appropriately packaged, usually in a container, and ensure that it is clearly sealed and labeled.
Storage and transportation
Storage conditions: Color pastes usually need to be stored in dry and cool conditions, avoiding direct sunlight and high temperatures.
Transportation: Follow relevant regulations and safety requirements for chemical transportation to ensure the safety and stability of the color paste during transportation.
