Shanghai Daoqin Plastics Co., Ltd.

in has non metal 密封垫 sheet/slice in, polyoxymethylene (POM) 密封垫 is comprehensive property can versus good product types.

第一, polyoxymethylene (POM) 密封垫 mechanical properties good

1, polyoxymethylene (POM) 密封垫 tool has relatively high machine strong/high degree, but also in high temperature lower strong/high degree reduce very less. its resistant 拉, resistant pressure, flexural strength high, elastic property is 达26700公斤/平方 cm ratio poly acid amine high 40%, 此ABS high 60%, ratio poly carbon acid high 25%, temperature degree rise 至400 degree 时, this value 不变, therefore has very high hardness and rigid property.

2, polyoxymethylene (POM) 密封垫 has good impact resistant property can, but also can resistant more heavy impact.

3, polyoxymethylene (POM) 密封垫 creep resistance can good. in long time negative function lower, deformation value small (即引起永久 deformation negative value high), elastic property high, in 200公斤/平方 cm 落 拉 force function lower, Sample in 42 small rear, long 1.13%, in remove force 时 伸 long is 0.45%, 30 small rear, long is 0.07%.

4, polyoxymethylene (POM) 密封垫 fatigue resistance can good, can upper 万次 循 ring negative 荷, degree reduce very less.

5, has lubricated property, scratch retardant force small, friction coefficient low, add a small amount of PTFE rear, wear resistance more good.

第二, polyoxymethylene (POM) 密封垫 resistant temperature property can good

hot property temperature degree relatively high, negative is 18.5公斤/平方 cm 时, POM copolymer is 110 degree, POM homopolymer is 1240 degree, melting point separation is 160 degree and 175 degree. long as temperature degree can 达100 degree above, POM copolymer in 140 degree 时, make month 2,000 small 时, or in 138 degree 时连续 use 1000 small 时, property can has obvious 变化.

第三, polyoxymethylene (POM) 密封垫 resistant solvent agent and corrosion resistant property can relatively good

in various has machine solvent agent in solvent understanding degree very small, increase heavy large, strong/high degree value significantly, relatively easy solvent type and 共衍生 material. can resistant low acid, low alkali, dilute acid, dilute alkali, resistant strong/high acid, strong/high alkali. resistant various oxidation 荆, resistant 辐射, resistant day light, resistant outer 线, resistant 燃. POM homopolymer resistant property 略差于 POM copolymer.

第四, polyoxymethylene (POM) 密封垫 hot separation understanding temperature degree high

in 300 degree above 才会引起 separation understanding, in has oxygen gas in lower separation understanding very fast, therefore in polyoxymethylene (POM) products in add has antioxidant.

第五, polyoxymethylene (POM) 密封垫 electrical property can good

不受 temperature degree, wet degree effect/influence (因 saturated and water absorption very low, has 0.2%一0.25%）

（本文 源公众号: in high 科, 仅供参考. ）