环烯烃共聚物COC 日本JSR G7810
环烯烃共聚物（COC）的是一种非晶态的高分子聚合物，只有几个别制造商生产。COC是一个相对较新级别的聚合物，与聚丙烯和聚乙烯相比。这种材料主要用于要求玻璃般清晰产品，包括镜头，小瓶，显示器和医疗设备。
环烯烃共聚物的自然形态，类似玻璃。典型环烯烃共聚物材料，比高密度聚乙烯和聚丙烯模量较高。由于其化学，模量越高，就越变得脆。环烯烃共聚物也是一个防潮湿的，低吸水率的高透明聚合物。在医疗应用领域，环烯烃共聚物是一个低萃取物纯度高的产品。环烯烃共聚物也是一个无卤素产品。
医用级高透明高耐温COC
TOPAS 是Topas Advanced Polymers GmbH公司开发出来的环烯烃类共聚物（COC）的商品名，是具有环状烯烃结构的非晶性高透明共聚高分子。TOPAS COC 树脂是一种基于独创的茂金属催化技术的高品质和高纯度非晶性环状树脂。在标准要求很严的医疗器械装置和检查诊断器具等医疗领域，作为高品质和高成本的石英玻璃和 PDMS（polydimethylsiloxane）等的替代材料，TOPAS COC具有最佳特性和性价比。

Cyclic Olefin Copolymer (COC) is an amorphous polymer made by several polymer manufacturers. COC is a relatively new class of polymers when compared to polypropylene and polyethylene. This material is primarily used in applications requiring glass-like clarity including lenses, vials, monitors, and medical devices.
COC has a transparency similar to glass in its natural b. Typical COC material will have a higher modulus than HDPE and PP. Due to its chemistry, the higher the modulus, the more brittle it becomes. COC also has a high moisture barrier for a b polymer along with a low absorption rate. In medical applications, COC is noted to be a high purity product with low extractables. COC is also a halogen-free product.
Some properties will vary due to monomer content. These include glass transition temperature, viscosity, and stiffness. The glass transition temperature of these polymers can exceed 150 °C
Extrusion
COC can be extruded with both cast and blown film equipment. These films are then used in consumer applications including food and pharmaceutical packaging. Commercial structures of COC used in blister packs are typically coextruded with a thick COC core and thin polypropylene skin layers. PVC and PvDC can also be placed on the skins via lamination. Profile extrusion is another b that can be used to make COC reinforced tubes or pipes.
 Molding
While there are many different types of molding, COC is primarily used in injection molding. Its natural clarity makes it useful in lenses for cameras, projectors and copiers. COC has little to no extractables which make it useful in diagnostic and medical devices. Most COC grades can also undergo sterilization by gamma radiation, steam and ethylene oxide.
Fiber Spinning
COC has unique electrical properties that resist dielectric breakdown and have a very low dielectric loss over time. Because of this COC is used in filter media that require a charge retention to work properly