POM Sheet
Product Description
Polyoxymethylene, commonly known as POM, it is a thermoplastic engineering plastics with high melting point and high crystallinity, a yellowish or white crystalline polymer with smooth and dense surface. According to the chemical structure of molecular chain, it can be divided into polyformaldehyde copolymer and polyformaldehyde homopolymer.
Comparing the properties of polyformaldehyde copolymer with polyformaldehyde homopolymer, some properties of copolymer are superior to homopolymer such as low melting point, thermal stability, chemical resistance, liquidity, hydrolysis resistance, acid and alkali resistance, superior process ability. However, some properties of homopolymer are also better than copolymer including high crystallinity, creep resistance, lower thermal expansion, abrasion resistance, good mechanical strength, high rigidity and so on.
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JING GU PRODUCT PHYSICAL PROPERTIES |
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Property |
Items |
Test method |
Unit |
JING GU POM |
|
Mechanical property |
Tensile strength |
ISO 527-1、2 |
Mpa |
57 |
|
Bending strength |
ISO 178 |
Mpa |
76 |
|
|
Bending tensile stress |
ISO 527 |
Mpa |
68/- |
|
|
Stretching strain at break |
ISO 527 |
% |
35 |
|
|
Tensile modules of elasticity |
ISO 527 |
Mpa |
3100 |
|
|
Compressive stress under 1% and 2% normal strain |
ISO 604 |
Mpa |
19/35 |
|
|
Pendulum impact test |
ISO 179/1eA |
kj/m2 |
8.6 |
|
|
Rockwell hardness |
|
HR |
L97 |
|
|
Physical property |
Density |
ISO 1183 |
g/cm3 |
1.41 |
|
Water absorption (23℃ water soak for 24 hours) |
ISO 62 |
% |
0.22 |
|
|
Coefficients of linear thermal expansion (23-100℃ average value) |
|
m/(m.k) |
110×10-5 |
|
|
Flammability (UL) |
UL94 |
|
HB |
|
|
Heat resistance |
Melting point |
|
℃ |
165 |
|
Temperature resistance (continuous) |
|
℃ |
105 |
|
|
Temperature resistance (short time) |
|
℃ |
140 |
|
|
Insulating property |
Dielectric strength |
ISO 60243 |
kv/mm |
20 |
|
Volume resistance |
ISO 60093 |
Ω·cm |
1O14 |
|
|
Surface resistance |
ISO 60093 |
Ω |
1O16 |
|
|
Relative permittivity -100HZ/1MHZ |
ISO 60250 |
|
3.8/3.8 |
|
|
Chemical property |
Acid resistance |
|
|
- |
|
Alkali resistance |
|
|
+ |
|
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Carbonation resistance |
|
|
+ |
|
|
Aromatic compounds resistance |
|
|
+ |
|
|
Ketone resistance |
|
|
+ |
|
|
Other |
Adhesion |
|
|
+ |
|
Friction coefficient |
|
|
0.32 |
|
|
Food contact |
|
|
+ |
|
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Remark |
1.Above data is only for reference.It may vary according to different processing method and sample. 2.These data can’t be simply transferred to the finished parts.The applicability of materials for specific applications should be tested by the processor and user. 3.These technical parameters are used as a help.They do not represent a promise of performance. 4.Above specification “+” represents resistant, “-” represents resistless, “0″ represents it depends. |
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Properties
1. Strong mechanical strength, high rigidity and hardness
2. Good sliding performance, abrasion resistance and creep resistance
3. Good dimensional stability
4. Physiological inertia and suitable to contact with food
5. Good machinability
6. Low impact strength
7. Poor acid resistance and weather resistance
Application
Widely used for sliding and rotating machinery, precision components, gears and bearings in automotive, electronics, medical care, machinery and sports apparatus.
