POM GC25A赫斯特

缩醛共聚物级GC25A是一种含有25%增强纤维玻璃的玻璃偶联配方。该等级提供了优异的强度，刚度和热变形温度，较低的模具收缩，Zui小的热膨胀，优良的尺寸稳定性和良好的可成型性

POM(聚甲醛#赛钢)/GC25A/美国塞拉尼斯

用途： 电子电器 ，重要参数： 密度:1.58 g/cm3 吸水率:0.8 % 成型收缩率:0.4 % 弯曲强度:160 MPa 弯曲模量:8700 MPa 维卡软化点:161 ℃ 热变形温度:160 ℃

生产厂商：美国塞拉尼斯公司

POM(聚甲醛#赛钢)/AC GC25A BK/美国Pier One 特性备注：玻璃纤维增强材料, 25% 填料按重量，重要参数： 熔体流动速率:7 g/10min 密度:1.58 g/cm3 缺口冲击强度:67 拉伸强度:72.4 MPa 断裂伸长率:5 % 弯曲强度:117 MPa 弯曲模量:6550 MPa 热变形温度:149 ℃ 填充物含量:22 %

生产厂商：美国Pier One公司   

Polyformaldehyde is an important kind of thermoplastic engineering plastics. It has two kinds of polymers, homopolymer and copolymer. The main chain structure of polyformaldehyde is a high crystallinity polymer. Polyformaldehyde has high rigidity and resilience, excellent fatigue resistance and wear resistance, less creep and water absorption, good chemical corrosion resistance, solubility resistance, self-lubrication and electrical insulation. In many applications, it can replace non-ferrous metals such as steel, copper, aluminium and zinc. It is widely used in automotive industry, electronic and electrical, industrial instruments, consumer goods and other fields. In the 1960s and 1970s, the main consumer markets of polyformaldehyde were in Europe and America. After entering the 1980s, Japan's consumption increased rapidly. In the past decade, with the gradual transfer of downstream industries of polyformaldehyde from Japan to foreign countries, Japan's consumption growth slowed down, while consumption in other parts of Asia grew fastest in the world.

The time of developing POM in China is almost the same as that of DuPont Company, which is earlier than that of Asahi Cheng Company in Japan. However, after ten years'development, there is a big gap in technology level between China and foreign companies, which is characterized by small scale, high energy consumption, low grade and unstable product quality. In the past, POM in China missed the opportunity of industrialization of R&D achievements due to insufficient development of downstream products, small demand and planned economic system, and so on. At present, POM is only operating in pilot-scale plants, which is bound to be difficult to compete with foreign products. However, it should also be noted that POM has better conditions in terms of self-development technology level, stable operation time of 1000-ton plant and raw material sources. Some experts in the industry believe that domestic technology has the ability to build large-scale plants in some key technological links, but it needs a certain amount of capital investment. The existing production units will run well, and various auxiliary processes will be improved to prepare conditions for the expansion of the plant scale.