Why do you produce water bag, colorful sand particles is not 'perfect'

Color particle bleeding reason: refers to the phenomenon of the dispersed phase paint over protective film into the continuous phase. Continuous phase transition is cloudy. After construction, the edge between different color particles is no longer clear, the color of the base color changes, color adornment effect is affected by a lot. The solution: the reason of this phenomenon is commonly particles protective film is too soft, not strong enough. Protective film of the solvent concentration should be increased in order to improve the strength of the protective film. Solvent concentration, however, cannot raise too high, otherwise the particle surface hardness is too hard, uneven coating film is obvious, feel is rough. Should choose the appropriate concentration to overcome bleeding and turbid phenomenon. Dispersed phase particles gather reason: dispersed phase particles is not stable, easy to each other. Stored after a period of time, the particles will gather, separation and insoluble state will change. Solution: the reason of this problem is also related to the intensity of the preparation methods of protecting glue and thin film. The same as the color particle bleeding problem solving method. Color particles floating layer or the bottom of the sink: density and viscosity of the dispersed phase and continuous phase difference is too big. If the density of the dispersed phase is too big, particles easily sink. If the density is too small, the dispersed phase particles float easily, resulting in the dispersed phase and continuous phase stratified. Solution: according to the density of the dispersed phase and continuous phase and its difference in control. At the same time, inorganic or organic thickening agent can be added to the continuous phase, in order to improve the bearing capacity of the continuous relative color particles. Color particles become smaller and broken by extrusion reason: this is because the particles in the process of storage and transportation squeeze each other. First of all, the particle deformation. Deformation in a certain extent after the break the surface tension of the particles, particles will be shattered into small and scattered points. Or because the extrusion pressure between the particles to accelerate the mutual penetration between the particles, leading to the edge of the particles gradually blurred, particle string together. Solution: this problem related to the intensity of the particles. If the elements in the dispersed phase can strongly linked together, they are not easy to be outside force or destruction. Should point out the weak link in and improve the dispersed phase. Color particles expansion reason: particles crosslinked too much, lack of viscoelastic cannot spray, film after big surface is too rough. Solution: control the crosslinking degree of particles and particle intensity.