Some people think that the use of
engineering plastics instead of metal, product quality should be reduced. In fact, replacing plastic with engineering plastics has improved the quality of the product in many applications. The following compares engineering plastics with metals to give you a more comprehensive understanding of the performance of engineering plastics. The main advantages of engineering plastics and metals are the following 7 points:
(1) Light weight: The proportion of engineering plastics is generally around 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 property of plastics is of particular importance for mechanical equipment that requires a reduction in its own weight, such as vehicles, ships and aircraft.
(2) High strength: For the same volume of materials, the strength of engineering plastics is generally lower than that of metals. However, since engineering plastics are much lighter than metals, the strength ratio of some engineering plastics is compared with equal weight. Generally, the metal is much higher and is the most strong material in existing structural materials. For example, a glass fiber reinforced epoxy resin has a tensile strength per unit weight that is about 2 times higher than that of a general 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 outstanding anti-corrosion ability, and have broad development prospects in chemical anti-corrosion equipment.
(4) Excellent electrical performance: almost all engineering plastics have superior electrical insulation properties, minimal dielectric loss and excellent arc resistance, and can be compared with ceramics, rubber and other insulating materials. Therefore, the application of engineering plastics in the electrical, electrical and electronic industries has extremely broad prospects.
(5) Excellent anti-friction and wear resistance: With this characteristic, various self-lubricating bearings, gears and sealing rings can be manufactured with engineering plastics, and engineering plastics also have good burial of foreign objects.
(6) Excellent shock absorption and noise reduction: machinery equipped with engineering plastic bearings and gears can reduce vibration, reduce noise, and even eliminate noise. For example, the automobile tie rod ball head seat was originally made of 45-gauge carbon steel, which has a short service life; the noise is large; after changing to nylon, the service life is extended by about 1 time, and the noise is greatly reduced.
(7) Convenient molding and processing: engineering plastic products can often be formed at one time, and metal products must be processed through several times, dozens or even dozens of processes. This characteristic of engineering plastics is very meaningful for saving man-hours and increasing labor productivity.
Because engineering plastics have many advantages over metals in physical and mechanical properties, they are increasingly used in industry, which also promotes the rapid development of the plastics industry.
Roller Shutter Door
Roller shutter door , also known as "shutter door", lots of panel pieces connected together, fixed in the guide rail , take above reel as the center of rotation.
Roller shutter door is used for commercial facades, garages, shopping malls, hospitals, factories and mines and other public places or residential.Electric roller shutter door, especially for large openings, inconvenient to install the ground door , quick opening effect. Such as for the garage door, shopping mall fire shutter door.
Opening methods: Handing driving mode
Rope driving mode
Remote control driving mode
Electric switch driving mode
Roller Shutter Door,Galvanized Roller Shutter Door,Aluminum Roller Shutter Door,Transparent Roller Shutter Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfgaragedoor.com
