Why is engineering plastics so popular in the market?

Dec 30, 2022

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Engineering plastics is a kind of polymer material with excellent performance, which can be used as structural materials to withstand mechanical stress in a wide range of temperature range and be used in harsh chemical and physical environments. Now the application of engineering plastics is more and more extensive, which is closely related to our life. What are the characteristics and properties of engineering plastics? We also know why engineering plastics are so popular and recognized in the market.

Performance characteristics of engineering plastics:

1. Light product quality: the specific gravity of engineering plastics is generally about 0.83~2.2, only 1/9~1/4 of steel and 1/2 of aluminum. Some engineering plastics, such as polypropylene, are much lighter than water. This characteristic of engineering plastics is of great significance to mechanical equipment such as vehicles, ships and aircraft that need to reduce their deadweight.

2. Specific strength: For materials of equal volume, the strength of engineering plastics is generally lower than that of metals. However, compared with the same weight, engineering plastics are much lighter than metals, and the strength of some engineering plastics is much higher than that of ordinary metals, which are the materials with higher strength among the existing structural materials. For example, the modified and enhanced PPS has good stiffness, and there is a metal sound when the product lands.

3. Good chemical stability: Engineering plastics generally have good corrosion resistance to acid, alkali and other chemicals, which is a very obvious advantage. For example, polytetrafluoroethylene and polyphenylene sulfide have excellent corrosion resistance, and have broad prospects for development in chemical anti-corrosion equipment and other fields.

4. Excellent electrical function: almost all engineering plastics have good electrical insulation function, low dielectric loss and good arc resistance, which can be compared with ceramic, rubber and other insulating materials. Therefore, the application of engineering plastics in the motor, electronic and electrical industry has a very broad prospect.

5. Antifriction and good wear resistance: with this feature, engineering plastics can be used to manufacture various self-lubricating bearings, gears and sealing rings. Engineering plastics also have excellent foreign matter burial performance, which is particularly important in harsh conditions with abrasive particles or impurities.

6. Good shock absorption and noise elimination effect: machinery equipped with engineering plastic bearings and gears can reduce vibration, noise and even noise elimination.

7. Simple molding and processing: Engineering plastic products can often be molded at one time, while metal products are always processed through several, dozens or even dozens of processes. This characteristic of engineering plastics is of great significance for saving working hours and improving labor productivity. In addition, the mechanical processing of engineering plastic products is relatively simple, with stable dimensions, low mold costs and high yield.