PBT的技术:PBT技术基于PBB技术,其核心是对PBB技术进行改进,通过网络管理和控制,使CE中的业务事实上具有连接性,以便实现保护倒换、OAM、QoS、流量工程等电信网络的功能。
PBT的颗粒展示图: 、
PBT的性能:
a、机械性能:强度高、耐疲劳性、尺寸稳定、蠕变也小(高温条件下也极少有变化);
b、耐热老化性:增强后的UL温度指数达120~140℃(户外长期老化性也很好);
c、耐溶剂性:无应力开裂;
d、对水稳定性:PBT遇水易分解(高温、高湿环境下使用需谨慎);
e、电气性能:
1、绝缘性能:优良(潮湿、高温也能保持电性能稳定,是制造电子、电器零件的理想材料);
2、介电系数:3.0-3.2;
3、耐电弧性:120s
f、成型加工性:普通设备注塑或挤塑。由于结晶速度快,流动性好,模具温度也比其他工程塑料要求低。在加工薄壁制件时,仅需几秒钟,对大部件也只要40-60s即可。
理论特性:
自润滑、低摩 擦系数,但体积电阻、介电损耗大。缺点是缺口冲击强度低 ,成型收缩率大。故大部分采用玻璃纤维增强或无机填充改性,其拉伸强度、弯曲强度可提高一倍以上,热变形温度也大幅提高。可以在140℃下长期工作,玻纤增强后制品纵、横向收缩率不一致,易使制品发生翘曲。
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物性表:
Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.50 g/cc | 0.0542 lb/in³ | ISO 1183 | ||
Water Absorption at Saturation | 0.40 % | 0.40 % | ISO 62 | ||
Linear Mold Shrinkage | 0.019 cm/cm | 0.019 in/in | Pigmentation can change mold shrinkage. | ||
Linear Mold Shrinkage, Transverse | 0.019 cm/cm | 0.019 in/in | Pigmentation can change mold shrinkage. | ||
Melt Flow | 52.5 g/10 min @Load 2.16 kg, Temperature 250 °C |
52.5 g/10 min @Load 4.76 lb, Temperature 482 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Hardness, Shore D | 81 | 81 | ISO 868 | ||
Ball Indentation Hardness | 160 MPa | 23200 psi | H30; ISO 2039-1 | ||
Tensile Strength at Break | 55.0 MPa | 7980 psi | 5 mm/min; ISO 527-1/2 | ||
Elongation at Break | 3.0 % | 3.0 % | 5 mm/min; ISO 527-1/2 | ||
Tensile Modulus | 3.10 GPa | 450 ksi | ISO 527-1/2 | ||
Charpy Impact Unnotched | 2.50 J/cm² @Temperature -30.0 °C |
11.9 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eU | ||
2.50 J/cm² @Temperature 23.0 °C |
11.9 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eU | |||
Charpy Impact, Notched | 0.300 J/cm² @Temperature -30.0 °C |
1.43 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | ||
0.300 J/cm² @Temperature 23.0 °C |
1.43 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eA | |||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+15 ohm-cm | 1.00e+15 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+13 ohm | 1.00e+13 ohm | IEC 60093 | ||
Dielectric Constant | 3.4 @Frequency 100 Hz |
3.4 @Frequency 100 Hz |
IEC 60250 | ||
3.4 @Frequency 1e+6 Hz |
3.4 @Frequency 1e+6 Hz |
IEC 60250 | |||
Dielectric Strength | 27.0 kV/mm | 686 kV/in | K20/P50; IEC 60243-1 | ||
Dissipation Factor | 0.0020 @Frequency 100 Hz |
0.0020 @Frequency 100 Hz |
IEC 60250 | ||
0.020 @Frequency 1e+6 Hz |
0.020 @Frequency 1e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 225 V | 225 V | Test Solution A, 100 drops; IEC 60112 | ||
250 V | 250 V | Test Solution A, CTI; IEC 60112 | |||
Thermal Properties | Metric | English | Comments | ||
CTE, linear | 110 µm/m-°C @Temperature 23.0 - 55.0 °C |
61.1 µin/in-°F @Temperature 73.4 - 131 °F |
Longitudinal; ISO 11359 | ||
CTE, linear, Transverse to Flow | 110 µm/m-°C @Temperature 23.0 - 55.0 °C |
61.1 µin/in-°F @Temperature 73.4 - 131 °F |
ISO 11359 | ||
Melting Point | 221 - 226 °C | 430 - 439 °F | DSC | ||
Deflection Temperature at 0.46 MPa (66 psi) | 185 °C | 365 °F | ISO 75-1/2 | ||
Deflection Temperature at 1.8 MPa (264 psi) | 80.0 °C | 176 °F | ISO 75-1/2 | ||
Vicat Softening Point | 192 °C | 378 °F | 50N; ISO 306 | ||
216 °C | 421 °F | 10N; ISO 306 | |||
Flammability, UL94 | V-0 @Thickness 0.400 mm |
V-0 @Thickness 0.0157 in |
|||
V-0 @Thickness 1.60 mm |
V-0 @Thickness 0.0630 in |
||||
V-0 @Thickness 0.800 mm |
V-0 @Thickness 0.0315 in |
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Oxygen Index | 32 % | 32 % | ISO 4589 | ||
Glow Wire Test | 960 °C @Thickness 2.00 mm |
1760 °F @Thickness 0.0787 in |
IEC 60695-2-1/0-3 | ||
De |
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Color | Natural, White | ||||
Electrolytic Corrosion | A1 Step | IEC 60426 |