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Common Problems In Injection Molding After Adding Color Masterbatch

2008/8/11 9:46:00 41780

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In the sunlight, there are stripe pigments in the products.

This problem needs to be considered from two aspects: physical and mechanical properties of plastics and plastic molding process.

1. the temperature of the injection molding equipment is not well controlled, and the color master can not be fully mixed with the resin after entering the mixing chamber.

2. injection molding machine does not add a certain back pressure, screw mixing effect is not good.

3. the dispersity of the color masterbatch is not good or the plasticization of the resin is not good.

The process can be debugged as follows:

1. increase the temperature of the mixing chamber by the blanking part.

2. apply a certain back pressure to the injection molding machine.

If the above debugging is still not good, it may be the dispersion or matching problem of color masterbatch and resin, and should be contacted with the manufacturers of masterbatch.

After using certain color masterpieces, the products appear to be easier to crack.

This may be due to poor diffusion and miscibility caused by the poor quality of dispersants or auxiliaries used by manufacturers, which may affect the physical and mechanical properties of products.

The color is too deep (too shallow) according to the ratio of the color guide.

Although the problem is simple, there are many possibilities.

1. the color mother has not been seriously tested, and the pigment is too little or too much.

2. when the use of measurement is inaccurate, the phenomenon of arbitrary measurement by domestic enterprises, especially small and medium-sized enterprises, exists in large numbers.

3. there is a problem in matching the color mother with the resin, which may be improper selection of the carrier of the color masterbatch, or it is possible for the manufacturer to change the resin varieties at will.

4. the temperature of the machine is not proper, so the color master stays too long in the machine.

Processing program: first check whether the resin varieties match with the color master and measure accurately. Secondly, adjust the temperature or speed of the machine. If there are still problems, contact the color masterbatch manufacturer.

The same color masterbatch, resin and formula, different injection molding machine injection products why the color is shallow?

This is often the cause of the injection molding machine.

Different injection molding machines cause different mechanical states due to different manufacturing, using time or maintenance condition, especially the difference of the degree of adhesion between the heating original and the barrel, so that the dispersion of the color mother in the barrel is different.

After changing the resin of another brand, the same color and formula, the color has changed. Why?

Different grades of resin density and melting index will be different, so the performance of the resin will be different, and the compatibility of the color parent will be different, so the color change, generally speaking, as long as the density and melting index difference is not much, then the color difference is not too large, can be adjusted by the dosage of the color to more positive color.

Does the pfer of pigment in the storage process affect the quality of the product?

In some cases, the pigment content (or dyestuff) is very high. In this case, the phenomenon of migration is normal.

Especially when adding dye to the color masterbatch, serious migration will occur.

But this does not affect the quality of the product, because the pigment is in the normal color concentration when it is injected into the product.

Why are some injection products luster bad?

There are many possibilities:

1. the nozzle temperature of injection molding machine is too low.

2. the mold finish of injection molding machine is poor.

3. product forming cycle is too long.

4. the color of the pigment contains too much titanium dioxide.

5. the color masterbatch is not well dispersed.

After a period of time, some plastic products will fade.

The quality of basic pigments used by manufacturers is not good enough to cause drifting.

Why is ABS Color Masterbatch particularly prone to color differences?

The chromatism of different brands of ABS produced by different countries is large, even if the same brand ABS, each batch batch number may also have chromatic aberration.

This is due to the characteristics of ABS, and there is no complete solution in the world.

However, this color difference is generally not serious.

When users use the ABS color master, we must pay attention to this characteristic of ABS.