描述
用于动态阀的耐磨POM
POM的优点
高耐磨性
低摩擦系数
高耐热性
良好的电气和介电性能
低吸水性
动态阀用耐磨聚甲醛
产品详细信息
动力阀特殊材料，高强度/抗蠕变/抗疲劳POM颗粒
1。机械性能由于聚甲醛是一种高度结晶的聚合物，它具有高弹性模量、高硬度和刚性
它可以在-40~100°C的温度下长期测试。此外，它能抵抗反复冲击，强度变化不大。强度很少受到温度和温度变化的影响
2。热性能
聚甲醛具有较高的热变形温度、136°C的均聚温度和110°C的共聚温度。然而，由于分子结构的差异，共聚甲醛具有较高的连续使用温度
3。耐化学性聚甲醛的基本结构决定了它在室温下没有溶剂。在树脂的熔点或接近熔点时，几乎找不到溶剂，只有少数物质（如全氟丙酮）可以形成非常稀的溶液
特别是在高温条件下，它具有相当好的耐腐蚀性。此外，尺寸和机械强度变化不大
4。电学性能POM良好的电学性能之一是介电常数不受温度和湿度的影响。由不同制造工艺引起的微量杂质水平的差异可能对体积电阻产生数量级的影响
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聚甲醛由于其性能和价格优势，可以取代PC、PBT和其他材料在汽车领域的应用。在汽车工业中，PC在车内和车外装饰件中的应用历史悠久。然而，POM的固有性能以及相关新技术带来的可能性和成本差异，已经取代了室内外装饰部件类别中的大量PC结构解决方案。在PBT的一些典型应用中，POM的性能优于PBT（基于更好的耐热性和电阻），并且其电气性能足够，此时成本优势突出。在高档轿车应用中，成本差异为20%
电子邮件：### Wear Resistance POM For Dynamic ValvePOM advantages Wear Resistance POM For Dynamic Valve Product Details
Power valve special material, high strength / creep resistance / fatigue resistant POM granule 1.Mechanical properties Since POM is a highly crystalline polymer, it has a high modulus of elasticity, high hardness and rigidity. It can be tested at -40~100°C for a long time.Moreover, it is resistant to repeated shocks and has little change in strength.The intensity is rarely affected by temperature and temperature changes. POM is the most excellent type of fatigue resistance in thermoplastic materials with low creep. 2. Thermal performance The POM has a high heat distortion temperature, a homopolymerization of 136 ° C, and a copolymerization of 110 ° C.However, due to differences in molecular structure, the copolymerized formaldehyde has a higher continuous use temperature. In terms of the long-term use temperature of polyoxymethylene, it is about 100 °C.The acetal copolymer can be continuously used at 114 ° C for 2000 h, or continuously used at 138 ° C for 1000 h.The temperature can be used up to 160 °C. According to the US UL specification, the long-term heat resistance temperature of polyoxymethylene is 80 ° C ~ 105 ° C. 3. Chemical resistance The basic structure of polyoxymethylene determines that it does not have a solvent at room temperature.At or near the melting point of the resin, almost no solvent is found, and only a few substances such as perfluoroacetone can form a very dilute solution. Therefore, POM is highly resistant to organic solvents and oil resistance in all engineering plastics. Especially in high temperature conditions, it has quite good corrosion resistance. Moreover, the size and mechanical strength do not change much. POM has good compatibility with various pigments and is easy to color, but since some pigments are acidic, pigments for POM need to be carefully selected. The production of the masterbatch is also far more demanding than the general resin. POM cannot be colored with dye due to its crystallinity. 4. Electrical performance One of the good electrical properties of POM is that the dielectric constant is not affected by temperature and humidity. The difference in trace impurity levels caused by different manufacturing processes can have an order of magnitude effect on volume resistance. Insufficient POM performance: relatively high density, opaque, not acid resistant; large molding shrinkage; low melting point; thermal degradation is quite rapid at higher temperatures. Thermal oxygen degradation also occurs in the presence of oxygen. In addition to the above properties, homopolyformaldehyde has high density, crystallinity and mechanical strength. The short-term strength, modulus, elongation, heat distortion temperature, creep resistance, heat aging resistance and hot water resistance of the copolymerized formaldehyde are superior to those of homopolyformaldehyde, and the molding temperature range is also wide.
POM can replace the application of PC, PBT and other materials in the automotive field due to its performance and price advantages. In the automotive industry, PC has a long history of use in interior and exterior decorative parts. However, the inherent performance of POM and the possibility and cost difference caused by related new technologies have replaced a large number of PC structural solutions in the category of interior and exterior decorative parts. POM performs better than PBT (based on better heat resistance and resistance) in some typical applications of PBT, and its electrical performance is sufficient, at which time the cost advantage is highlighted. In premium sedan applications, the cost difference is 20%. Contact Now Tina Lin Email : ### 您必须登录才能发表评价。 相关产品 |
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