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Discussion on the substitution of metal for engineering plastics!
Discussion on the substitution of metal for engineering plastics!
- Categories:Industry knowledge
- Author:Xiao Cheng
- Origin:
- Time of issue:2020-12-04 16:15
- Views:
(Summary description)Among all kinds of plastics, some are as hard as stone, and some are as tough as steel. Some people think that replacing metal with engineering plastics will reduce product quality. The fact is that replacing metal with engineering plastics has improved the quality of the product on many occasions. The following will compare engineering plastics with metal, so that everyone has a more correct and comprehensive understanding of the performance of engineering plastics.
Discussion on the substitution of metal for engineering plastics!
(Summary description)Among all kinds of plastics, some are as hard as stone, and some are as tough as steel. Some people think that replacing metal with engineering plastics will reduce product quality. The fact is that replacing metal with engineering plastics has improved the quality of the product on many occasions. The following will compare engineering plastics with metal, so that everyone has a more correct and comprehensive understanding of the performance of engineering plastics.
- Categories:Industry knowledge
- Author:Xiao Cheng
- Origin:
- Time of issue:2020-12-04 16:15
- Views:
Metal is a non-renewable resource, and it is a trend to replace steel with plastic!
Engineering plastics instead of metal
Among all kinds of plastics, some are as hard as stone, and some are as tough as steel. Some people think that replacing metal with engineering plastics will reduce product quality. The fact is that replacing metal with engineering plastics has improved the quality of the product on many occasions. The following will compare engineering plastics with metal, so that everyone has a more correct and comprehensive understanding of the performance of engineering plastics.
The main advantages of engineering plastics compared to metal
(1) The product is light in quality: the specific gravity of engineering plastics is generally about 0.83 to 2.2, which is only 1/9 to 1/4 of that of steel and about 1/2 of that of aluminum. For example, PP is lighter than water. Therefore, this characteristic of plastic is of special significance for mechanical equipment requiring lightening of its own weight.
(2) High strength: For materials of equal volume, the strength of engineering plastics is generally lower than that of metals, but because engineering plastics are much lighter than metals, some engineering plastics are stronger than ordinary when compared with equal weight. The metal is much higher and is the strongest material among the existing structural materials. For example, glass fiber reinforced epoxy resin, its tensile strength per unit weight is about 2 times higher than that of general steel.
(3) Good chemical stability: Engineering plastics generally have good corrosion resistance to chemicals such as acids and alkalis, which is a major advantage. Among them, polytetrafluoroethylene and polychloroether have outstanding anti-corrosion ability, and they have broad development prospects for use in chemical anti-corrosion equipment.
(4) Excellent electrical properties: Almost all engineering plastics have superior electrical insulation properties, very small dielectric loss and excellent arc resistance characteristics, which are comparable to insulating materials such as ceramics and rubber. Therefore, the application of engineering plastics in the motor, electrical and electronic industries has extremely broad prospects.
(5) Excellent anti-friction and wear resistance performance: With this feature, engineering plastics can be used to manufacture various self-lubricating bearings, gears and sealing rings. Engineering plastics also have good burying properties for foreign bodies.
(6) Excellent shock absorption and noise reduction: machinery equipped with engineering plastic bearings and gears can reduce vibration, attenuate noise, and even eliminate noise. For example, the original use of No. 45 carbon steel for the ball joint of the automobile tie rod has a short service life and high noise; after switching to nylon, not only the service life is prolonged by about twice, but the noise is greatly reduced.
(7) Convenient molding and processing: Engineering plastic products can be molded at one time, while metal products always have to go through several or even more than a dozen procedures to be processed. The characteristic of engineering plastics is very meaningful for saving man-hours and improving labor productivity.
Take polycarbonate (PC) as an example. It not only has the strength similar to non-ferrous metals, but also has ductility and toughness. Its impact strength is extremely high. It cannot be damaged by hammering and can withstand the TV screen. explode. Polycarbonate has excellent transparency and can be applied with any coloring. The specific comparison is as follows:
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