Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.40 g/cc | 0.0506 lb/in³ | ISO 1183 | ||
Water Absorption | 0.80 % | 0.80 % | Saturation; ISO 62 | ||
Moisture Absorption at Equilibrium | 0.20 % | 0.20 % | 23°C; 50% RH; ISO 62 | ||
Linear Mold Shrinkage, Flow | 0.021 cm/cm | 0.021 in/in | ISO 2577 | ||
Linear Mold Shrinkage, Transverse | 0.021 cm/cm | 0.021 in/in | ISO 2577 | ||
Melt Flow | 10.5 g/10 min @Load 2.16 kg, Temperature 190 °C |
10.5 g/10 min @Load 4.76 lb, Temperature 374 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Ball Indentation Hardness | 130 MPa @Load 36.5 kg, Time 30.0 sec |
18900 psi @Load 80.5 lb, Time 0.00833 hour |
ISO 2039-1 | ||
Tensile Strength, Yield | 63.0 MPa | 9140 psi | 50 mm/min; ISO 527-2 | ||
Elongation at Break | 33 % | 33 % | Nominal, 50 mm/min; ISO 527-2 | ||
Elongation at Yield | 12.5 % | 12.5 % | 50 mm/min; ISO 527-2 | ||
Modulus of Elasticity | 2.45 GPa | 355 ksi | ISO 527-2 | ||
Izod Impact, Notched (ISO) | 6.00 kJ/m² @Temperature -30.0 °C |
2.86 ft-lb/in² @Temperature -22.0 °F |
ISO 180/A | ||
6.50 kJ/m² @Temperature 23.0 °C |
3.09 ft-lb/in² @Temperature 73.4 °F |
ISO 180/A | |||
Charpy Impact Unnotched | 19.0 J/cm² @Temperature -30.0 °C |
90.4 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eU | ||
26.0 J/cm² @Temperature 23.0 °C |
124 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eU | |||
Charpy Impact, Notched | 0.550 J/cm² @Temperature -30.0 °C |
2.62 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | ||
0.650 J/cm² @Temperature 23.0 °C |
3.09 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eA | |||
Tensile Creep Modulus, 1000 hours | 1000 MPa @Strain <=0.500 % |
145000 psi @Strain <=0.500 % |
ISO 899-1 | ||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+13 ohm-cm | 1.00e+13 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+15 ohm | 1.00e+15 ohm | IEC 60093 | ||
Dielectric Constant | 3.8 @Frequency 1.00e+6 Hz |
3.8 @Frequency 1.00e+6 Hz |
IEC 60250 | ||
3.9 @Frequency 100 Hz |
3.9 @Frequency 100 Hz |
IEC 60250 | |||
Dielectric Strength | 36.0 kV/mm | 914 kV/in | IEC 60243-1 | ||
Dissipation Factor | 0.0030 @Frequency 100 Hz |
0.0030 @Frequency 100 Hz |
IEC 60250 | ||
0.0060 @Frequency 1.00e+6 Hz |
0.0060 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 600 V | 600 V | Test solution A; IEC 60112 | ||
600 V | 600 V | Test solution B; IEC 60112 | |||
Thermal Properties | Metric | English | Comments | ||
CTE, linear, Parallel to Flow | 110 µm/m-°C @Temperature 23.0 - 55.0 °C |
61.1 µin/in-°F @Temperature 73.4 - 131 °F |
DIN 53752 | ||
Melting Point | 167 °C | 333 °F | DIN 53765 | ||
Maximum Service Temperature, Air | 100 °C | 212 °F | |||
Deflection Temperature at 1.8 MPa (264 psi) | 100 °C | 212 °F | ISO 75-2 | ||
Vicat Softening Point | 150 °C | 302 °F | ISO 306 | ||
Flammability, UL94 | HB @Thickness 1.60 mm |
HB @Thickness 0.0630 in |
|||
Processing Properties | Metric | English | Comments | ||
Melt Temperature | 200 °C | 392 °F | Optimal | ||
190 - 230 °C | 374 - 446 °F | Injection-molding | |||
Mold Temperature | 60.0 - 120 °C | 140 - 248 °F | Injection-molding | ||
90.0 °C | 194 °F | Optimal | |||
Drying Temperature | 100 °C | 212 °F | |||
Dry Time | 3 hour | 3 hour | |||
De |
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Commercial Status | Europe | ||||
Ignition Temperature | 320-340 °C | ASTM D1929 | |||
Primary Processing Technique | Injection Molding |
POM 的简介
聚甲醛是一种表面光滑,有光泽的硬而致密的材料,淡黄或白色,可在-40- 100°C温度范围内长期使用。它的耐磨性和自润滑性也比绝大多数工程塑料优越,又有良好的耐油,耐过氧化物性能。很不耐酸,不耐强碱和不耐紫外线的辐射。
POM 物理性质
聚甲醛的拉伸强度达70MPa,吸水性小,尺寸稳定,有光泽,这些性能都比尼龙好,聚甲醛为高度结晶的树脂,在热塑性树脂中是最坚韧的。具抗热强度,弯曲强度,耐疲劳性强度均高,耐磨性和电性能优良。
POM 聚甲醛的性能:
性 能 数 值
比重 1.43
熔点 175°C
伸强度(屈服) 70MPa
伸长率(屈服) 15%
(断裂) 15%
冲击强度(无缺口) 108KJ/m2
(带缺口) 7.6KJ/m2
应用范围
POM属结晶性塑料,熔点明显,一旦达到熔点,熔体粘度迅速下降。当温度超过一定限度或熔体受热时间过长,会引起分解。
POM具有较好的综合性能,在热塑性塑料中是最坚硬的,是塑料材料中力学性能最接近金属的品种之一,其抗张强度、弯曲强度、耐疲劳强度,耐磨性和电性都十分优良,可在-40度--100度之间长期使用。
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