1. Ecological and environmental protection
Environmental protection refers to ecological issues under the guidance of REACH regulations and the concept of textile ecological products, rather than simple environmental protection indicators, that is, the entire industrial chain of the PU color paste used in the process of research and development, manufacturing, processing and application has an impact on ecology and human beings. No health hazard.
2. Fastness properties
(1) Color fastness to light
Some special varieties of textiles such as swimwear fabrics, curtains and outdoor decorative fabrics have extremely strict requirements on light resistance, which requires the selection of corresponding color pastes with good light fastness before processing.
(2) Migration resistance
The migration problem is the sublimation phenomenon caused by the instability of pigment crystals in organic pigments under high temperature and humidity conditions. The migration resistance of PU color paste can directly judge other fastnesses of color paste. To test PU color paste, first test its excellent sublimation fastness.
3. Color paste viscosity
High-quality PU color paste should have the characteristics of high environmental protection, high fastness, high concentration, high cost performance and low viscosity. Domestic printing and dyeing enterprises are used to thinking that the colorant should be viscous. For low-viscosity and high-quality colorants, they mistakenly believe that the colorant has insufficient concentration or low solid content. In fact, manufacturers of high-quality paint pastes choose dispersants with excellent dispersing properties to disperse pigments, so that the same amount of dispersants can disperse more pigments, and the entire active system is more stable, with lower viscosity, better rheology, and better concentration. can be higher.
4, tinting strength
The tinting strength is closely related to the particle fineness of the colorant. The color paste per unit mass, the finer the particles, the larger the surface area, the more the accumulation layers in the unit area, the higher the reflectivity, the more deep and vivid the color.
5. Batch stability
The stability of batches is the key to the long-term survival of a brand in the market. In addition to the requirements of printing and dyeing enterprises for the environmental protection and fastness characteristics of color pastes, the stability of batches is regarded as a prerequisite for long-term cooperation.
6. Cost-effective
High-quality paint paste is more expensive than ordinary paint paste, which is mainly determined by research and development costs, publicity and promotion, purchase of raw materials, equipment investment, quality inspection and monitoring, and packaging and transportation. However, it is relatively cost-effective.
