| How to choose and use masterbatch masterbatch Notes | |
| Release time：2016/9/23 | |
How to choose masterbatch
Masterbatch selection factors need attention
(1) Security masterbatch
(2) Type of TiO2 masterbatch contentCategory
(3) masterbatch additive content
(4) Viscosity of masterbatch matches the raw material system
(5) masterbatch in the processing temperature zone of low molecular weight volatiles content (high temperature)
(6) the dispersion of masterbatch
(7) Color Stability
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Note the use of masterbatch
(1) Fixed masterbatch, the proportion of use of raw materials: masterbatch ratio will affect different colors, cover rate;
(2) fixed production process: changing the process parameters need to be evaluated, or affect the product quality;
(3) Fixed mixing time: masterbatch and proportion of raw materials, particles of different shapes, such as the mixing time is not fixed, it will lead to uneven distribution of masterbatch materials or segregation stratification in the mixing tank;
(4) To prevent static: plastic mixing process due to static friction, leading to uneven distribution;
(5) half-way down: barrel raw materials need to be evacuated, and lower cylinder temperature to avoid thermal oxidative decomposition of the raw material for a long time, causing yellowing and film black spots;
(6) The choice of materials choices: try not to choose BHT antioxidants contain raw materials, because hindered phenolic antioxidants at high temperatures, high humidity, there is an oxide in the presence of an alkaline environment, prone to auto-oxidation reaction leads to the finished surface of the plastic discoloration (usually becomes pink or yellow) will occur;
(7) Storage: Please masterbatch stored in a dry, ventilated and clean environment, ambient temperature is below 50 ℃, to avoid contamination. Warehouses need to use car batteries, because a large number of automobile exhaust oxide (NOx, SOx) exist, will accelerate the plastic BHT antioxidant oxidation, resulting in a film discoloration.
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