Shanghai Daoqin Plastics Co., Ltd.

         also poly oxidation 次甲基, 英文名polyoxymethylene（简称POM）. separation structure and crystallization property make its material mechanical properties separation excellent, has metal plastics 之称. POM is white transparent crystallization property property thermoplastic property resin, tool has good comprehensive property can and ****, tool has relatively high elastic property modulus, very high rigid property and hardness, ratio strong/high degree and ratio rigid property 接近于 metal; tensile strength, flexural strength, creep resistance and fatigue resistance excellent, resistant impact, 载回复 property excellent; friction coefficient small, wear resistant consumption, dimensional stability good, surface gloss good, has relatively high viscous elastic property, electrical insulation property excellent, 且不受 temperature degree effect/influence; resistant insulation property good 且不受 wet degree effect/influence; chemical resistant product property excellent: remove strong/high acid, type and has machine material outer, for other chemical product stability, oil resistant; mechanical properties temperature degree effect/influence small, tool has relatively high heat deflection temperature (HDT). disadvantages is flame retardant property relatively 差, 遇火徐徐燃烧, oxygen index (LOI) small, make add flame retardant 也 不 to requirements, another weather resistance 不理想, outer application need add stabilizer.
　　 POM homopolymer crystallization degree high , machine strong/high degree, rigid property, heat deflection temperature (HDT) and other ratio POM copolymer good, POM copolymer melting point low, heat stabilized property, chemical resistant property, flow features, processing property excellent POM homopolymer, new development product is ultra- high flow （ fast speed molding ）, resistant impact and reduce mold grade, has machine filling, reinforcement grade.
　　 POM water absorption large 于0.2%, molding front drying, POM熔 melt temperature degree and separation understanding temperature degree versus 近, molding property relatively 差, can injection molding, extrusion, blow molding, rotational molding, welding, bonding, coating film, printing, electroplating, machine processing, injection molding is most important processing methods, molding shrinkage large, mold temperature degree high, or 进行退火处理, or add reinforcement material （如无 alkali glass fiber ）.
　　 POM strong/high degree high, light , commonly used copper, zinc, 锡, and other has color metal, used for industrial machine 械, automotive, electronics electrical appliances, day use product, pipeline and parts, precision device and building materials and other 部门.
　　 POM applications : by used for manufacturing various sliding, machine parts, various gears, 杠杆, slip 轮, 链轮, especially 适宜做 bearings, hot water 阀门, precision amount 阀, machine ring and 辊子, amount 计, automotive inner external 手, and other 车窗转动 machine 械, bearings base/seat and 叶轮燃 gas 开关阀, electronics parts, solid 体, 接线柱镜面罩, electrical parts, add hot sheet/plate, table/sheet 钮; 录音录像 belt/tape bearings; various pipeline and 农业喷灌 system and 阀门, 喷头, water leading, 洗浴盆 parts; key/critical 盘, 按钮, belt/tape 卷轴; temperature 控定时 device; force tool, 庭园整理工 tool parts; another can as is sheet/plate, and various parts, table/sheet micro type gears, use equipment frame parts and use various ring 扣, solid parts, machine, 拉链, ring; medical devices in 心脏起博 device; 人造心脏瓣 film, 顶椎, false and other.