Little knowledge of plastic products

Directly with the dye (pigment or dye) added amount of powder additives for plastic particles coloring method, also known as dry coloring.

Its advantages are good dispersion, low cost, and small batch operation. Because it obviates the other stains, such as the consumption of manpower and material resources in Masterbatch, color paste process. Thus, the cost is low, restrictions on both sides from the amount of the sale. Manufacturing masterbatch can make 1 ~ 2kg, but the toner can be arbitrary specified quality, the preparation is very convenient. Use toner coloring, compared with other coloring of granulation, resin processing experience a degradation process, is conducive to reducing the aging of plastic products, increase its service life.

But the biggest drawback is that the pigment in transportation, storage, weighing, mixing process will float in the sky, resulting in pollution, serious impact on the work environment. With environmental protection, corporate ISO 9000 requirements, toner color more and more subject to limitations, but for the coloring of a special effects, using toner directly mixing coloration with some color masterbatch coloring is not up to the effect. For example: some poor heat resistance, afraid of shear pigment powder fineness mother, due to withstand the high temperature time, and in batch processing equipment by shear time long, coloring effect will be significantly reduced, such as bead color powder, fluorescent powder, luminous powder. With the pearlescent pigments made masterbatch coloring plastics, than the direct use of pearl powder mixed with colored plastic. The pearlescent effect to decreased about 10% and injection molding products is easy to produce the streamline shaped scar and seams. We in the manufacture of this kind of masterbatch, were taken corresponding measures, as possible to reduce color masterbatch are heated in the process of temperature, time and shear degree (without twin-screw granulator, and the use of single screw granulator, etc.).

Dry coloring another problem is that the user's head is not easy to clean the hopper. Used to color toner in white oil wetting agent under the action, with attached wall barrel (or screw). When the need to reload, cleaning barrel became operatives on site problem, time-consuming and expensive material, get twice the result with half the effort, and the use of Color Masterbatch coloring no this problem.

Also use toner coloring, due to pigment powder evenly distributed in color of the resin, so the dispersion better, this conclusion only for injection molding products, especially the wall thickness, for blown film, spinning products is another matter. Because the toner generally no pretreatment, when mixed in the resin alone from the extruder feed mouth, a screw rod, and a material outlet such a distance and so short of plasticization and mixing time to make powder pigment molecules and coloring pigment molecules to join hands to, fully integrated, is completely can not be guaranteed, there will be "cooked" phenomenon. But this "raw" phenomenon will be covered in thick wall products, is obviously in the film, spinning products. So the latter is still the masterbatch coloring method.

In addition, toner for manufacturers is different from the production date, batch number, the same brand of toner also exist a certain color, even if the user to use the same formula, but in the process it is difficult to do color consistency between batches of injection molding products and masterbatch in production process can midway through sampling, inspection, adjustment to compensate for the color of each batch of toner, relatively speaking, Masterbatch color repeatability is obviously superior to the toner.

Because the toner used for coloring plastics has various limitations and challenged other stains, but due to the relatively low cost of production, color, color is not affected by the amount of restrictions, for SMEs in developing countries, the private enterprise to want to participate in the fierce market competition, to use the toner has the certain economic, especially some color sample of single, large output, in front of the color requirements is not high products, such as PVC windows and doors, EVA soles, or favor to it and toner colorant can not completely withdraw from the stage.