|Keyword:||Pom Plastic Cnc Machined Parts||Drawing Format:||3D(IGES/STEP)|
|Delivery Time:||15-20 Days||Size:||Custom|
High Performance Plastics Pom Parts,
High Performance Plastics Parts 1.42g/Cm3
Pom plastic cnc machined parts High Performance Plastics ODM OEM
(1) POM is a crystalline plastic with a density of 1.42g/cm3, and its rigidity is very good,
commonly known as "Saigang".
(2) It has excellent properties such as fatigue resistance, creep resistance, wear
resistance, heat resistance, impact resistance, etc., and has a small friction coefficient
and good self-lubrication.
(3) POM is not easy to absorb moisture, the water absorption rate is 0.22-0.25%, the
dimensional stability is good in a humid environment, the shrinkage rate is 2.1% (larger),
the size is difficult to control during injection molding, and the thermal deformation
temperature is 172 ℃. There are two types of polyoxymethylene, which have different
properties (homopolyoxymethylene has better temperature resistance).
(1) POM does not need to be dried before processing, and it is best to preheat during
processing (about 80 °C), which is good for product dimensional stability.
(2) The processing temperature of POM is very narrow (0 ~ 215 ℃), and it will
decompose when it stays in the barrel for a little longer or the temperature exceeds
220 ℃, producing irritating formaldehyde gas.
(3) When the POM material is injected, the holding pressure should be larger (similar
to the injection pressure) to reduce the pressure drop. The screw speed should not be
too high, and the residual amount should be small;
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