A Connection Between Shear Strength And Processing Temperature In Processing Permanent Antistatic Additives

Permanent antistatic additives for POM an additive that can maintain the antistatic properties of POM materials for a long time. It is usually achieved by adding specific chemicals to POM materials or using special processing techniques. The working principle of the permanent antistatic additive is to form a conductive layer on the material’s surface, so that the charge can be quickly conducted to the ground or other conductors, thereby avoiding the accumulation of charge and reducing the generation of static electricity. The advantage of a permanent antistatic agent for POM is that it can effectively prevent the generation of static electricity for a long time, and will not lose its antistatic properties even after repeated rubbing and washing during use. In addition, it can also improve the wear resistance, heat resistance, and mechanical strength of POM materials. In practical applications, permanent antistatic additives for POM are usually used to manufacture some products that are sensitive to static electricity, such as electronic parts, automotive parts, medical equipment, etc. It can effectively improve the reliability and safety of these products and reduce the impact of static electricity on product performance.


Processing for POM permanent antistatic additives


We usually modify the POM resin, permanent antistatic additive, and a small amount of compatibility before injection molding or extrusion. In the modification process, there are certain requirements for processing temperature and twin screw combination and shear strength, shear strength varies with processing temperature:


permanent antistatic additives

  • Twin screw combination: It is necessary to select a screw suitable for POM processing to ensure that the material can be fully plasticized and mixed. Generally speaking, POM requires screws without stagnant areas, but the specific screw combination needs to be adjusted according to the actual situation.
  • Shear strength: Appropriate shear force can improve the plasticizing effect and mixing uniformity of POM. A very strong shear force may cause the material to decompose, and a very weak shear force may affect the plasticizing and mixing effects. Therefore, the shear force needs to be adjusted according to the characteristics of POM and processing technology requirements.

During the processing, you also need to pay attention to the following points:


-Temperature control: The processing temperature of POM is relatively high, generally between 165-180 degrees centigrade. The heating temperature needs to be adjusted according to the actual situation to ensure that the material can be fully plasticized.POM Resin is more than 165 degrees centigrade, and the compounding temperature of permanent antistatic POM should be as low as possible, even at 110-120 degrees centigrade, it ensures less smoke, less odor, and less dosage of permanent antistatic agent.

-Pre-drying treatment: POM has low water absorption, but it still needs to be dried before processing to remove moisture and avoid bubbles and surface defects in the product.

-Mold design: Reasonable mold design can improve product quality and production efficiency. It is necessary to pay attention to factors such as mold temperature control, gate design, and demoulding slope.

-Raw material selection: Choosing good quality POM resins and permanent antistatic additives can improve the performance and quality of the product.

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