The color masterbatch used in pipe material is common.Do you know the requirements and precautions of tube color masterbatch?

Basic requirements of the color masterbatch of pipe

 (1) Good dispersion

 (2) Stability of high temperature processing

 (3) The phenomenon of non color transfer

 (4) The particle size of the color masterbatch must be consistent with the particle size of the basic plastic raw material used, which is conducive to uniform mixing and coloring in the coloring process

 (5) Proper proportion of Color Masterbatch, 1 ~ 4% (to avoid uneven coloring or waste)

Precautions for common application of pipe Color Masterbatch
(1) Scale: add correctly according to the specified color mother usage ratio, or test to determine the appropriate proportion

(2) Uniform mixing: pay attention to prevent static electricity generated during operation of machine and equipment, and interfere with the combination of raw materials

(3) Temperature: the temperature of the processing machine must be controlled accurately, and the upper limit temperature should not leave any allowance, otherwise it will cause adverse effects on the products (the temperature that can be processed at 200 ℃ should not be set at 230 ℃)

(4) If there is a big difference between the set temperature and the measured temperature, we should pay attention to whether the filter screen of the die head is blocked in time

(5) Shut down operation: when the machine is shut down, it is necessary to spit out all the internal feeding materials, especially when changing the color.Use a little raw material without color masterbatch to drive away all the base materials with primary color in the machine, and then shut down the machine after cleaning

(6) The impact of sudden shutdown: a part of the color masterbatch is in the back half of the screw, which has not been fully melted and dispersed. At this time, it stops in the screw chamber and is still baked at high temperature. As a result, the lubricating additives in the screw will evaporate and become dry, solid and coke.When the machine is turned on again, the dispersion of this part will be greatly reduced, some will become hard particles, stuck in the discharge port of the machine and become a kind of obstruction, resulting in stripes. To eliminate this phenomenon, it will take a long time and cause a lot of waste.If there is no color change, but the machine must be shut down, the processing temperature in the screw barrel can be reduced half an hour before the machine is shut down.