What are the precautions for the use of color masterbatch in plastic injection molding?
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- Unsolveddestoon
- 2021-08-16 14:58
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- 1Flooranonymity
- 2021-08-17 14:43
1. How to use color masterbatch?
The use of color masterbatch is very simple, just mix it with the resin particles according to the specified ratio, and then stir it by hand.
The following issues should be paid attention to in the operation of the equipment:
1.1 The mixing cavity of an injection molding machine or extruder generally has multiple temperature zones. The temperature of the section near the blanking port should be slightly higher. This is to make the color masterbatch into the mixing cavity to melt quickly and mix with the plastic resin as soon as possible Uniformity, which is conducive to the good dispersion of the masterbatch pigment in the product.
1.2 Appropriately apply back pressure to the injection molding machine, which can improve the mixing effect of the screw and facilitate the dispersion of pigments. The side effect of applying back pressure is to slow down the injection speed.
1.3 Increase the temperature of the die of the extruder appropriately to increase the brightness of the product.
2.How to determine the use ratio of color masterbatch?
The basis for determining the use ratio of color masterbatch is to obtain a satisfactory coloring effect. As long as the surface tone of the product is uniform and there are no streaks and spots, it can be approved. The use ratio of color masterbatch can be selected as follows:
1:100 Unless the mixing performance of the equipment is very good, uneven pigment dispersion is likely to occur. Qiselu generally does not recommend customers to use this ratio.
1:50 is used for plastic products with general coloring requirements. PE and PP color masterbatches are more commonly used in this ratio
1:33-1:25 is used for PO products with high coloring requirements, and ABS products with low coloring requirements or general
1:20 Used for advanced plastic products, including PO, ABS, and can be widely used in injection molding, blow molding, spinning and other processes
1:20 or more Generally used for coloring of high-grade cosmetics containers, and mostly used for small injection molding machines
The use of color masterbatch is very simple, just mix it with the resin particles according to the specified ratio, and then stir it by hand.
The following issues should be paid attention to in the operation of the equipment:
1.1 The mixing cavity of an injection molding machine or extruder generally has multiple temperature zones. The temperature of the section near the blanking port should be slightly higher. This is to make the color masterbatch into the mixing cavity to melt quickly and mix with the plastic resin as soon as possible Uniformity, which is conducive to the good dispersion of the masterbatch pigment in the product.
1.2 Appropriately apply back pressure to the injection molding machine, which can improve the mixing effect of the screw and facilitate the dispersion of pigments. The side effect of applying back pressure is to slow down the injection speed.
1.3 Increase the temperature of the die of the extruder appropriately to increase the brightness of the product.
2.How to determine the use ratio of color masterbatch?
The basis for determining the use ratio of color masterbatch is to obtain a satisfactory coloring effect. As long as the surface tone of the product is uniform and there are no streaks and spots, it can be approved. The use ratio of color masterbatch can be selected as follows:
1:100 Unless the mixing performance of the equipment is very good, uneven pigment dispersion is likely to occur. Qiselu generally does not recommend customers to use this ratio.
1:50 is used for plastic products with general coloring requirements. PE and PP color masterbatches are more commonly used in this ratio
1:33-1:25 is used for PO products with high coloring requirements, and ABS products with low coloring requirements or general
1:20 Used for advanced plastic products, including PO, ABS, and can be widely used in injection molding, blow molding, spinning and other processes
1:20 or more Generally used for coloring of high-grade cosmetics containers, and mostly used for small injection molding machines