The main equipment for producing black masterbatch is a twin-screw extruder. The common production process for black masterbatch is as follows: ingredient mixing, extrusion, stretching, cooling, and packaging. The disadvantage of the appearance of masterbatch products is a major quality issue, which may be caused by factors such as the production process, raw material quality, production equipment, and production environment of the masterbatch.

Problem 1: The black masterbatch appears elongated. A length greater than twice that of a normal particle is considered a long strip. The main causes of the occurrence are the opening or breakage of the strip, the direction of the material strip is not straight, and the cutting machine shows wear or gaps.

Solution:

1. During normal production, adjust the direction of the material strip entering the pelletizer and the length of the adjusted water flow.

2. During production, the broken strip needs to be strictly covered and the process needs to be adjusted.

3. Pay attention to the inspection of the cutting blade and replace damaged blades in a timely manner.

4. Suitable vibrating screens should be used for the long strips presented, and sieving should be carried out.

Question 2: The black masterbatch shows a continuous grain situation. Two or more particles connected side by side are called connected particles. The main causes of occurrence are breakage of the pulling rod and insufficient length of water passing through it.

Solution:

1. When extruding the strip, choose a guide wheel with appropriate width to separate the connected strips.

2. Adjust the appropriate length of cooling water, that is, reduce the number of continuous particles.

3. The continuous particles presented can be sieved through a vibrating screen with appropriate mesh size.

Article source: Taishan conductive mica particles

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