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This method is often used for coloring rubber products, and the coloring agent is added directly or mixed with the carrier first and then added to the rubber, and mixed evenly through the rubber making machine,
Make the rubber coloring. Specific methods are as follows.
( 1 ) dry powder coloring this method is to directly add the powder coloring agent with the small material - together with the rubber, mixing on the opening machine. The advantage of the method is simple operation, cost However, it is not easy to disperse evenly, and there is color difference. If the particles are too hard and too coarse, it will also cause color spots, streaks or mutual pollution of chromatography. Quality problems, now less used. In order to facilitate the use of powder colorant with stearic acid, sulfate and other pre-dispersion of colorant, the market has been sold. The market has been sold.
( 2 ) color paste coloring this method is the first coloring agent and liquid compound (such as plasticizer) mixed, with three rollers machine grinding into a paste or slurry, and then according to - a certain proportion, the coloring agent is added to the rubber mixing. Then add to the rubber in a certain proportion and mix. This method can avoid dust flying, also conducive to coloring agent in the rubber dispersion, color uniformity. However, the content of coloring agent in the color paste is low, and the coloring is not high. The coloring is not high, the transportation volume is large, the loss is large, and the user is not convenient to use.
( 3 ) granule coloring colorant granule preparation method mainly has two kinds. The first method and other powder with the same method of granulation, the first powder coloring agent with surface active The second method is the coloring agent with surfactant infiltration and then by the role of mechanical force to make the coloring agent particles, and then extruded by wax melt or melt with resin granulation; the second method is the coloring agent with surfactant infiltration The second method is to make the colorant particles finer by mechanical force after the colorant is infiltrated with surfactant, and then made into a certain concentration of dispersion, and then mixed with latex and co-sink, and granulated after drying and rolling. Most of the surfactants are anionic and non-ionic, such as fatty acid Salts, sulfonates, etc., latex is usually used natural latex. This kind of granular colorant is easy to use, good dispersion, no dust flying, no pollution of the environment, bright color, coloring Uniform, no color difference, is a very promising coloring method. But the granular colorant preparation process is complex, high cost, limiting its wide application.
(4) mother refining rubber coloring method is to first colorant, some plasticizers and other rubber compounding agents and raw rubber by the mixing machine into a concentration of about 50% of the colorant mother Refining rubber, and then proportionally mixed into the rubber coloring. This method is more effective for the coloring of fine particles and difficult to disperse colorants, with uniform color and no color difference. Pay attention to The concentration of coloring agent in the rubber and the amount of other compounding agent in the masterbatch are deducted.
Make the rubber coloring. Specific methods are as follows.
( 1 ) dry powder coloring this method is to directly add the powder coloring agent with the small material - together with the rubber, mixing on the opening machine. The advantage of the method is simple operation, cost However, it is not easy to disperse evenly, and there is color difference. If the particles are too hard and too coarse, it will also cause color spots, streaks or mutual pollution of chromatography. Quality problems, now less used. In order to facilitate the use of powder colorant with stearic acid, sulfate and other pre-dispersion of colorant, the market has been sold. The market has been sold.
( 2 ) color paste coloring this method is the first coloring agent and liquid compound (such as plasticizer) mixed, with three rollers machine grinding into a paste or slurry, and then according to - a certain proportion, the coloring agent is added to the rubber mixing. Then add to the rubber in a certain proportion and mix. This method can avoid dust flying, also conducive to coloring agent in the rubber dispersion, color uniformity. However, the content of coloring agent in the color paste is low, and the coloring is not high. The coloring is not high, the transportation volume is large, the loss is large, and the user is not convenient to use.
( 3 ) granule coloring colorant granule preparation method mainly has two kinds. The first method and other powder with the same method of granulation, the first powder coloring agent with surface active The second method is the coloring agent with surfactant infiltration and then by the role of mechanical force to make the coloring agent particles, and then extruded by wax melt or melt with resin granulation; the second method is the coloring agent with surfactant infiltration The second method is to make the colorant particles finer by mechanical force after the colorant is infiltrated with surfactant, and then made into a certain concentration of dispersion, and then mixed with latex and co-sink, and granulated after drying and rolling. Most of the surfactants are anionic and non-ionic, such as fatty acid Salts, sulfonates, etc., latex is usually used natural latex. This kind of granular colorant is easy to use, good dispersion, no dust flying, no pollution of the environment, bright color, coloring Uniform, no color difference, is a very promising coloring method. But the granular colorant preparation process is complex, high cost, limiting its wide application.
(4) mother refining rubber coloring method is to first colorant, some plasticizers and other rubber compounding agents and raw rubber by the mixing machine into a concentration of about 50% of the colorant mother Refining rubber, and then proportionally mixed into the rubber coloring. This method is more effective for the coloring of fine particles and difficult to disperse colorants, with uniform color and no color difference. Pay attention to The concentration of coloring agent in the rubber and the amount of other compounding agent in the masterbatch are deducted.
