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1. Basic requirements for pipe color masterbatch

(1) Good laxity

(2) Stability of high-temperature processing

(3) The phenomenon of colored relocation (color deviation) is not allowed

(4) The particle size of the masterbatch needs to match the particle size of the basic plastic material used, which is beneficial for even mixing and coloring during the coloring process

(5) The proportion of color masterbatch application is appropriate, with 1-4% being more suitable (to prevent uneven coloring or waste)

2. Common usage precautions for pipe color masterbatch

(1) Share: correctly add the color masterbatch according to the instructions, or conduct a test to determine the appropriate share

(2) Uniform mixing: Pay attention to preventing static electricity, disturbance, and the combination of materials during the operation of machinery and equipment

(3) Temperature: It is necessary to control the temperature of the processing machine accurately, and do not leave any margin for the upper limit temperature, otherwise it will have adverse effects on the product (do not set it to 230 ℃ for products that can be processed at 200 ℃)

(4) The difference between the set temperature and the measured temperature is significant, and timely attention should be paid to whether the mold head filter is blocked

(5) Shutdown operation: When the machine is stopped, it should first dispense all the internal feed, especially when changing colors. It is necessary to use a small amount of non masterbatch material to drive away all the base materials with the original color in the machine, remove them clean, and then stop the machine

(6) The impact of sudden shutdown: Some colorants are located in the latter half of the screw and have not yet fully melted or dispersed. At this moment, they are stopped in the screw chamber and are still being baked at high temperatures. The additives that create a smooth effect inside will evaporate and become dry, solid, and carbon deposits. When the machine is turned on again, the looseness of this part greatly decreases, and some may become hard particles that get stuck in the discharge port of the machine, becoming a barrier and causing stripes. To eliminate this phenomenon, it will take a long time and cause great waste. If there is no color change, but it is necessary to shut down, the processing temperature inside the screw barrel can be lowered half an hour before the shutdown.

Article source: Taishan conductive mica particles

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