| Know about tubing masterbatch? | |
| Release time：2016/9/24 | |
Join the masterbatch is designed to make pipe not pervious to light, prevent ultraviolet irradiation to make tube from foreign bodies. Of course, the quality of the pipe has to do with raw materials. Due to the pigments in the process of storage and use of direct contact with air, so will happen the phenomenon such as absorption of moisture, oxidation, cluster, directly use will appear in the plastic products surface color and dark color, the color fade easily changed, and dusty during mixing, affect the health of the operator. And in the process of production through the mechanical processing, refined processing of paint, paint and resin carrier, dispersant mixed fully, make the pigment from the air, water, thereby enhancing the weatherability of pigment, improves the dispersion of pigment and tinting strength, color light. Because close to resin particle shape, so more convenient and accurate in measurement, mixed won't stick on the container, so saved clean containers and machine time and raw materials used in the cleaning up.
3, the basic requirement of pipe masterbatch
(1) dispersion is better
(2) the stability of high temperature processing
(3) cannot be colored migration (run)
(4), the particle size must be used with the particle size of basic raw material for plastic particles, uniform mixing in the process of coloring and shading evenly
(5) use appropriate percentage masterbatch, 1 ~ 4% more appropriate, avoid to cause uneven colouring or waste)
Pipeline color masterbatch masterbatch
4, tubing masterbatch common application considerations
(1) according to the instruction of masterbatch proportion of use right to add, or test to determine the appropriate proportion
(2) well, pay attention to prevent electrostatic equipment operation, the combination of interference and raw materials
(3) temperature: the temperature of the processing machine must be controlled precisely, don't leave allowance limit temperature, or adverse effect will cause products processing and shaping (200 ℃ can not set it to 230 ℃)
(4) set temperature and actual temperature difference is big, should be timely attention to die screen whether there is a jam
(5) outage operation: when machine downtime, should first will all feed inside finish vomit, especially for color change, the more so. Need not add pigment raw material of a few, all away with a primary color material in the machine finishing, clean again after downtime
(6) the influence of the sudden stop: part of the pigment in the second part of the screw, has not yet been fully melting, scattered, stop at this point in the bore in the screw, also in the high temperature baking, caused the lubrication additives will evaporate, will become dry, solid carbon deposit. When turned on again, this part of the dispersion is greatly reduced, some will become each shot and card in the machine discharging mouth into a block, stripes, and to eliminate this phenomenon, is a longer process, caused great waste. If you don't change color, but when he has to stop, can be in half an hour before the downtime, to reduce the processing temperature in the screw tubes. |
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