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Polypropylene powder and granular materials are two common types in the field of plastics, with some similarities but also some obvious differences. The following is a detailed introduction to the differences between polypropylene powder and particle materials: 

1 Appearance: 

Polypropylene powder is a pure white powder material with relatively fine particle size, usually used to make various plastic products. Polypropylene pellets are granular materials with a particle size generally between 2-5 millimeters, suitable for injection molding and extrusion processes

2. Forming process: 

Polypropylene powder is suitable for various processes such as blow molding, compression molding, and injection molding; Polypropylene pellets are mainly used for injection molding and extrusion molding. This is because particulate materials are easier to melt in injection molding and extrusion processes, which is conducive to forming a uniform melt and is less prone to producing bubbles during the molding process

3. Processing characteristics: Due to the small particle size and low melting temperature of polypropylene powder, its melt viscosity is relatively high, and the control range of processing temperature is narrow. Polypropylene particles have good melt fluidity, a wider temperature range of use, and stronger adaptability

4. Mechanical properties: The mechanical properties of polypropylene powder and particle materials are basically the same, as they are both based on polypropylene as the basic material. Both exhibit excellent physical properties in terms of strength, hardness, and wear resistance

5. Product application: 

Polypropylene powder is generally used to make injection molded parts, films, foamed plastics, fibers and other products. Polypropylene pellets are suitable for injection molding, and common products include plastic boxes, bottles, pipes, etc

Overall, there are some differences between polypropylene powder and particle materials in terms of appearance, forming process, processing characteristics, mechanical properties, and product applications. Polypropylene pellets are more commonly used in injection molding and extrusion processes due to their special morphology and superior processing characteristics. Whether choosing polypropylene powder or particle materials, the key is to choose according to specific product requirements and manufacturing processes to achieve the best production effect and product quality.