物性表:
Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.37 g/cc | 0.0495 lb/in³ | ISO 1183 | ||
Water Absorption | 0.80 % | 0.80 % | ISO 62 | ||
Moisture Absorption at Equilibrium | 0.20 % | 0.20 % | 23°C/50% R.H.; ISO 62 | ||
Linear Mold Shrinkage | 0.019 cm/cm | 0.019 in/in | ASTM Data; MD | ||
Linear Mold Shrinkage, Flow | 0.019 cm/cm | 0.019 in/in | ISO Data | ||
Linear Mold Shrinkage, Transverse | 0.019 cm/cm | 0.019 in/in | ISO Data | ||
Melt Flow | 7.0 g/10 min @Load 2.16 kg, Temperature 190 °C |
7.0 g/10 min @Load 4.76 lb, Temperature 374 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Tensile Strength, Yield | 50.0 MPa | 7250 psi | 50mm/min; ISO 527 | ||
50.0 MPa | 7250 psi | 2 in/min; ASTM Test | |||
80.0 MPa @Temperature -40.0 °C |
11600 psi @Temperature -40.0 °F |
ISO Data | |||
Elongation at Break | 45 % | 45 % | 50mm/min, Nominal strain; ISO 527 | ||
Elongation at Yield | 12 % | 12 % | 50mm/min; ISO 527 | ||
12 % | 12 % | 2 in/min; ASTM Test | |||
7.5 % @Temperature -40.0 °C |
7.5 % @Temperature -40.0 °F |
ISO Data | |||
Tensile Modulus | 1.97 GPa | 286 ksi | ASTM Test | ||
2.00 GPa | 290 ksi | 1mm/min; ISO 527 | |||
Flexural Modulus | 1.97 GPa | 286 ksi | ASTM Test | ||
Izod Impact, Notched | 0.694 J/cm @Temperature -40.0 °C |
1.30 ft-lb/in @Temperature -40.0 °F |
ASTM Test | ||
1.20 J/cm @Thickness 3.17 mm |
2.25 ft-lb/in @Thickness 0.125 in |
ASTM Test | |||
Charpy Impact Unnotched | NB | NB | ISO 179 | ||
23.0 J/cm² @Temperature -30.0 °C |
109 ft-lb/in² @Temperature -22.0 °F |
ISO 179 | |||
Charpy Impact, Notched | 1.10 J/cm² | 5.24 ft-lb/in² | ISO 179 | ||
0.650 J/cm² @Temperature -30.0 °C |
3.09 ft-lb/in² @Temperature -22.0 °F |
ISO 179 | |||
Tensile Creep Modulus, 1 hour | 1550 MPa | 225000 psi | ISO 899 | ||
Tensile Creep Modulus, 1000 hours | 1050 MPa | 152000 psi | ISO 899 | ||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+12 ohm-cm | 1.00e+12 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+14 ohm | 1.00e+14 ohm | IEC 60093 | ||
Dielectric Constant | 4.0 @Frequency 100 Hz |
4.0 @Frequency 100 Hz |
IEC 60250 | ||
4.0 @Frequency 1.00e+6 Hz |
4.0 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Dielectric Strength | 40.0 kV/mm | 1020 kV/in | IEC 60243-1 | ||
Dissipation Factor | 0.010 @Frequency 100 Hz |
0.010 @Frequency 100 Hz |
IEC 60250 | ||
0.014 @Frequency 1.00e+6 Hz |
0.014 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 600 V | 600 V | IEC 60112 | ||
Thermal Properties | Metric | English | Comments | ||
CTE, linear | 70.0 µm/m-°C @Temperature -30.0 - 30.0 °C |
38.9 µin/in-°F @Temperature -22.0 - 86.0 °F |
ASTM Test | ||
CTE, linear, Parallel to Flow | 120 µm/m-°C | 66.7 µin/in-°F | ISO 11359 | ||
Melting Point | 167 °C | 333 °F | 10 K/min | ||
167 °C | 333 °F | ASTM Test | |||
Deflection Temperature at 0.46 MPa (66 psi) | 140 °C | 284 °F | ASTM Test | ||
150 °C | 302 °F | ISO 75 | |||
Deflection Temperature at 1.8 MPa (264 psi) | 85.0 °C | 185 °F | ASTM Test | ||
85.0 °C | 185 °F | ISO 75 | |||
Vicat Softening Point | 140 °C | 284 °F | (50 °C/h / 50N) - B/50; ISO 306 | ||
Flammability, UL94 | HB @Thickness 1.50 mm |
HB @Thickness 0.0591 in |
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HB @Thickness 3.00 mm |
HB @Thickness 0.118 in |
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De |
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Color | Natural | ||||
Commercial Status | Active America | ||||
Impact Modified | Yes | ||||
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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