This small series to introduce you to the common defects of masterbatch, these defects in the production process is also very headache. In the production process to take what kind of measures can reduce the problems caused by these defects? This is the most people are very concerned about the problem, today Plum Red plum Jiangsu will tell you the cause of the problem as well as remedial measures!
1, under the sun, the masterbatch products have stripe-shaped pigment band
This problem needs to be considered from two aspects of plastic physical mechanical properties and plastic molding process:
① injection molding machine temperature is not controlled, the masterbatch into the mixing chamber can not be fully mixed with the resin.
② injection molding machine without a certain amount of back pressure, screw mixing effect is not good.
③ masterbatch dispersion is not good or resin plasticization is not good.
Process can be used for debugging as follows:
①. The mixing chamber by blanking part of the temperature slightly increased
②. Apply a certain back pressure to the injection molding machine.
If the above debugging is still not good, it may be masterbatch, resin dispersion or matching problems, masterbatch manufacturers should contact the solution.
2, using a masterbatch, the product appears to be more prone to rupture
This may be due to the manufacturer's choice of dispersants or auxiliaries poor quality caused by diffusion mismolysis, affecting the physical and mechanical properties of products.
3, according to the proportion of masterbatch instructions after use, the color is too dark (too light)
Although the problem is simple, there are many possibilities:
3.1. Masterbatch without serious color test, too little or too much pigment
3.2. Inaccurate measurement when in use, the phenomenon of random measurement by domestic enterprises, especially SMEs, is abundant
3.3. There is a problem with the matching of the masterbatch and the resin, which may be due to improper selection of the carrier of the masterbatch or the change of the resin variety
3.4. Improper machine temperature, masterbatch stay in the machine for too long
Processing procedures: First check whether the variety of resin matches masterbatch, the measurement is accurate, then adjust the machine temperature or speed, if there is still a problem should contact the masterbatch manufacturer.
4, the same color masterbatch, resin and formula, the injection of different products why the color depth?
This is often caused by the injection molding machine. Different injection molding machine due to the manufacture, use of time or maintenance of different conditions, resulting in differences in mechanical conditions, especially heating the original and the barrel of the close degree of difference, the masterbatch dispersed in the barrel is not the same, The above phenomenon will appear.
5, for another brand of resin, the same masterbatch and formula, the color has changed, which is why?
Different brands of resin density and melt index will be different, so the performance of the resin will be different, and masterbatch compatibility will be different, resulting in color change, in general, as long as the density and melt index difference is not Big, so the difference between colors will not be too large, you can adjust the amount of masterbatch to correct the color.
6, the masterbatch occurred in the storage of pigment migration phenomenon will affect the quality of products?
Some color masterbatches have a high pigment content (or dye) and in this case migration occurs normally. In particular, adding the dye masterbatch, there will be a serious migration phenomenon. However, this does not affect the quality of the product, because the color masterbatch is injected into the product, the pigment in the product at a normal color concentration.
7, why some injection products gloss is not good?
There are many possibilities:
7.1. Injection molding machine nozzle temperature is too low
7.2. Mold injection molding machine finish is not good
7.3 product molding cycle is too long
7.4. Masterbatch contains too much titanium dioxide
7.5. Masterbatch dispersion is not good
8, after some time, some plastic products will fade.
The quality of the basic pigment used by the manufacturer is not good, drift occurs.
9, why ABS masterbatch is particularly prone to color differences?
Different grades of different countries produce ABS color difference, even if the same brand of ABS, batch number may also exist color, the use of color master color of course, there will be color. This is due to the characteristics of ABS, there is no international solution yet. However, this color is generally not serious.
Users using ABS masterbatch, we must pay attention to this feature of ABS.
Jiangsu Pulai Ke Hongmei Masterbatch Co., Ltd. is located in Changzhou Hi-tech Development Zone, which is a specialized enterprise engaged in R & D and manufacturing of plastic masterbatch in China earlier. At present, it is also a mature manufacturer of polyolefin masterbatch and functional masterbatch in East China. We "Chromatography, color fine, stable quality, sincere service" as the quality policy, "Customer Satisfaction" for the purpose of scientific management, continuous innovation, all-weather service universal guests.
The above is the nine masterbatch common problems, and the reasons for these defects, we get to the point?
