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Product Details
POM(Acetal) is one of the 5 kinds general engineering plastics, the full name Polyoxymethylene or polyacetal, it is high degree of crystallinity polymer, besides the high hardness, strength and rigidity modulus, it has others excellent physical properties compare to other general plastics,
1. High mechanical hardness;
2. Excellent fatigue resistivity;
3. High creep resistance, excellent rebound resilience;
4. High antifriction and anti-abrasion, used for high friction machine parts;
5. it can be processed among wide temperature range;
6. High dimension stability, hard to change according to the temperature
7. Its flow is good, easy to mold, surface gloss.
Grade | BS025 | BS090 | BS130 | BS270 | BS350 | BS450 | |||
Technical item | Unit | Test method | |||||||
Melt Index | g/10min | D1238 | 2.5 | 9 | 13 | 27 | 35 | 45 | |
Gravity | g/cm3 | D792 | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 | 1.41 | |
Rockwell hardness | M scale | D785 | 78 | 80 | 80 | 80 | 80 | 80 | |
R scale | - | 115 | - | - | - | - | |||
Bending strength | Kgf/cm2 | D790 | 950 | 950 | 950 | 950 | 950 | 950 | |
Bending modulus |
| D790 | 26.00 | 26.00 | 26.00 | 26.00 | 26.00 | 26.00 | |
Tensile Strength (Yield point) | Kgf/cm2 | D638 | 610 | 620 | 620 | 620 | 620 | 620 | |
Elongation (Breaking point) | % | D638 | 75 | 60 | 55 | 45 | 40 | 35 | |
Compressive Strength | 1%deformation | Kgf/cm2 | D695 | 320 | 320 | 320 | 320 | 320 | 320 |
10%deformation | Kgf/cm2 | D695 | 1,100 | 1,100 | 1,100 | 1,100 | 1,100 | 1,100 | |
Impact strength (Concave 23 oC 50% RH) | Kgf/cm | D256 | 7.6 | 6.5 | 6 | 5.4 | 5.1 | 4.5 | |
Water absorption (In 23 oC water 24 hrs) | % | D570 | 0.22 | 0.22 | 0.22 | 0.22 | 0.22 | 0.22 | |
Deflection temperature under load(18.6Kgf/cm2) | oC | D648 | 110 | 110 | 110 | 110 | 110 | 110 | |
Shrinkage for molding | % | 1.8-2.2 | 1.8-2.2 | 1.8-2.2 | 1.8-2.2 | 1.8-2.2 | 1.8-2.2 | 1.8-2.2 | |
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