How to use colored luminous powder in injection printing coatings

Color luminous powder is used for injection molding: the ratio of luminous powder to plastic material is generally about 4%-10%, depending on the color depth of the product, the light color is less, and the deep color is added. One ingredient: first add the diffusion oil to the raw material for one minute, then add the luminous powder for one minute, then add the color powder for two minutes, the mixing time should not be too long, pay attention! The long-lasting luminous powder is most likely to be rubbed with iron. When the time is too long, the raw material will be blackened. Second, the injection molding machine: the injection molding machine should be cleaned, the temperature should be adjusted to the minimum, can be injected, the time in the injection molding machine should not be too long, so as not to burn, the products injected by different machines, there are also differences, new machines and old Machines, domestic machines and imported machines, all need to be solved slowly. Third, luminous powder: long-lasting luminous powder in the injection molding for various reasons, injection molding technology, injection molding machine, the temperature of the dissolved material may cause blackening, short-acting luminous powder (zinc sulfide luminous powder) in the injection molding blackening performance a little. Short-acting luminous powder is also used if there is no special requirement.

Color luminous powder is used for printing: In order to reduce the problem of luminous powder in the coating and the precipitation of luminous powder, you can use high viscosity resin and add anti-settling agent. Stir well before use. Adjust the viscosity with thinner. Do not use heavy metal. Compounds are used as additives. The printed background is dominated by white or reflective colors to increase the brightness and illumination time of the printed pattern. The coating and ink coating thickness is preferably greater than 100μ, such as 130μ~150μ, which is the best effect (using 80 mesh screen printing, this thickness can be achieved in two passes). The recommended amount of luminous powder is 10% to 70% of the total weight. The more the amount of use, the better the luminous effect. According to different printing materials, choose different types of transparent substrates, such as printed metal materials, it is necessary to select metal-specific inks, such as printing PVC materials, it is necessary to select PVC-specific inks, the higher the transparency, the better the effect. For water-based paints and inks, the luminous powder must be treated with special microcapsules.

   Color luminous powder is used for coatings: 1. Resin and varnish: The resin selected should have good light transmission, and since the luminescent pigment is weakly alkaline, the resin is preferably neutral or weakly alkaline. Aqueous resins make water-based paints, and luminescent pigments require surface water resistance. Varieties of resin and varnish that can be selected: epoxy resin (E440), polyurethane resin (or varnish), amino varnish, polyester resin, acrylic resin, hydroxy acrylic resin, acrylic urethane varnish (two-component), light-colored alcohol Acid varnish, fluorocarbon resin, etc. Second, the choice of additives: auxiliaries in luminescent coatings mainly consist of dispersants and anti-settling agents, and heavy metal compounds cannot be used as auxiliaries. Glass or enamel-type containers should be used for the preparation of coatings. The particle size of the luminous powder should be as small as possible, the ratio is about 30-60%. When the coating is formulated, it should not be ground. The high-speed stirring method should be used. The relative specific gravity of the luminescent material is 3.6. ~4.0, it is easy to sink when formulating paint. By using anti-settling agent, the storage period of luminescent paint can be improved. Do not get near the fire, nor store your mouth.