Engineering plastics have many different characteristics than ordinary plastics. Someone may ask, can engineering plastics replace metals? In fact, replacing metal with engineering plastics has improved product quality in many occasions, so custom engineering plastics have become a trend. Here is a good proof.

(1) Light weight: The proportion of engineering plastics is generally about 0.83 to 2.2, only 1/9 to 1/4 of steel and about 1/2 of aluminum. Some engineering plastics are much lighter than water. This characteristic of plastics is of particular significance for machinery and equipment that require a reduction in weight, such as vehicles, ships, and aircraft.

(2) High specific strength: For materials of equal volume, the strength of engineering plastics is generally lower than that of metals. However, because engineering plastics are much lighter than metals, when compared with equal weight, some engineering plastics have The strength is much higher than that of general metals, and it is the highest strength material among existing structural materials. For example, the tensile strength per unit weight of glass fiber reinforced epoxy resin is about 2 times higher than that of ordinary steel.

(3) Good chemical stability: Engineering plastics generally have good corrosion resistance to chemicals such as acids and alkalis, which is a significant advantage. Among them, polytetrafluoroethylene and polychloroether have very outstanding anti-corrosion ability, and have broad development prospects in chemical anticorrosive equipment.

(4) Excellent electrical properties: Almost all engineering plastics have superior electrical insulation performance, very small dielectric loss, and excellent arc resistance. They can be compared with ceramic, rubber and other insulating materials. Therefore, the application of engineering plastics in motors, electrical appliances and electronics industries has extremely broad prospects.

(5) Excellent friction reduction and wear resistance: With this feature, engineering plastics can be used to manufacture various self-lubricating bearings, gears and seals. Engineering plastics also have good burial resistance to foreign matter, which is a good choice for harsh conditions where abrasive particles or impurities are present.

(6) Excellent shock absorption and noise reduction: Machines equipped with engineering plastic bearings and gears can reduce vibration, reduce noise, and even reduce noise. For example, the car tie rod ball head seat originally used 45 carbon-bonded steel, which has a short service life and a large noise; the use of nylon will not only extend the service life by about 1 time, but also greatly reduce the noise.

(7) Convenient molding and processing: Engineering plastic products can often be molded at one time, while metal products always have to go through several, dozens, or even dozens of procedures before they can be processed. This characteristic of engineering plastics is very meaningful for saving man-hours and improving labor productivity. Machining of plastics is also relatively easy.

In terms of custom engineering plastics, it can be designed and manufactured according to the different needs of customers. Compared with metals, engineering plastics are more convenient.