久久激情5月丁香伊人_αv中文字幕女人乱码在线_成年人看的毛片在线观看_国产上床视频_精品亚洲国产黄片_三级日本黄页网站大全_国产美女精品网站_在线观看中文综合亚洲_男操女视频免费_亚洲中文字幕无码永久

In recent years, engineering plastics have become a material with rapid growth in the plastic industry, with an annual consumption of more than 10% in China. With China' s sustained economic growth, the scope of application of engineering plastics has been continuously expanded, and it has been widely used in many industries, such as electronics and electrical, automobile, construction, mechanical equipment, new energy, transportation, etc. replacing steel with plastics has become an international popular trend.

I. global application trend of engineering plastics

According to the new data, engineering plastics are clearly classified into the field of new materials and become a key strategic emerging industry. In the field of new energy such as solar photovoltaic and wind energy, the application of engineering plastics in developed countries in Europe and the United States has reached 50%, while the proportion in China is less than 20%. Other basic materials are still mainly metal materials.

II. Why should engineering plastics replace metals

Engineering plastics is a rising star in the big family of plastics. They not only retain a series of excellent properties of ordinary plastics, but also are much higher than the heat resistance (generally, they can work at high temperatures above 100 ℃ ~ 200 ℃) and mechanical strength of ordinary thermoplastics. Therefore, they can replace metals as engineering materials (or structural materials) in many application fields.

With the development of society and science and technology, we have put forward higher requirements for industrial equipment and automobiles: light, energy-saving, beautiful, safe, environmental protection, etc. Plastic products have gained more and more obvious advantages in PK with metal materials due to their good performance, low price and simple processing technology.

Taking the automobile as an example, a large number of plastic products are used in the automobile industry to replace various expensive non-ferrous metals and alloy materials, which not only improves the beauty of the automobile shape and the flexibility of design, reduces the cost of parts processing, assembly and maintenance, but also reduces the energy consumption of the automobile. Therefore, replacing metal with engineering plastics is the demand of users, energy conservation and emission reduction, and market competition.

III. what are the specific advantages of engineering plastics over metal materials

Taking 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 very high. It can not be damaged by hammering, and can withstand the explosion of TV screen. The transparency of polycarbonate is excellent, and any coloring can be applied.

Facts have proved that neither metal nor ordinary plastics can meet more and more requirements for use and environmental protection. Engineering plastics and simpler processing methods are expected. Engineering plastics not only have high mechanical strength, but also have good comprehensive mechanical properties; Excellent heat resistance and durability, long service life and good reliability.

This article is from Jiangmen Engineering Plastics:http://www.xrtsm.com.cn/