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Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.45 g/cc | 0.0524 lb/in³ | ISO 1183 | ||
Water Absorption | 0.40 % | 0.40 % | DIN 53495/1L | ||
Moisture Absorption at Equilibrium | 0.20 % | 0.20 % | 23°C/50% R.H. | ||
Viscosity Test | 107 cm³/g | 107 cm³/g | Viscosity number; ISO 1628 | ||
Linear Mold Shrinkage, Flow | 0.0039 cm/cm | 0.0039 in/in | Sheet | ||
0.0043 cm/cm | 0.0043 in/in | 60x60x2mm; ISO 294 | |||
Linear Mold Shrinkage, Transverse | 0.0116 cm/cm | 0.0116 in/in | 60x60x2mm; ISO 294 | ||
0.0128 cm/cm | 0.0128 in/in | Sheet | |||
Melt Flow | 20.3 g/10 min @Load 2.16 kg, Temperature 250 °C |
20.3 g/10 min @Load 4.76 lb, Temperature 482 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Ball Indentation Hardness | 180 MPa | 26100 psi | ISO 2039-1 | ||
Tensile Strength at Break | 120 MPa | 17400 psi | 5mm/min; ISO 527-2 | ||
Tensile Strength | 60.0 MPa @Temperature 100 °C |
8700 psi @Temperature 212 °F |
ISO 527 | ||
83.0 MPa @Temperature 50.0 °C |
12000 psi @Temperature 122 °F |
ISO 527 | |||
110 MPa @Temperature 23.0 °C |
16000 psi @Temperature 73.4 °F |
ISO 527 | |||
155 MPa @Temperature -20.0 °C |
22500 psi @Temperature -4.00 °F |
ISO 527 | |||
Tensile Stress | 20.0 MPa @Strain 1.00 %, Temperature 140 °C |
2900 psi @Strain 1.00 %, Temperature 284 °F |
ISO 527 | ||
35.0 MPa @Strain 3.00 %, Temperature 140 °C |
5080 psi @Strain 3.00 %, Temperature 284 °F |
ISO 527 | |||
40.0 MPa @Strain 5.00 %, Temperature 140 °C |
5800 psi @Strain 5.00 %, Temperature 284 °F |
ISO 527 | |||
55.0 MPa @Strain 1.00 %, Temperature 40.0 °C |
7980 psi @Strain 1.00 %, Temperature 104 °F |
ISO 527 | |||
70.0 MPa @Strain 1.00 %, Temperature -40.0 °C |
10200 psi @Strain 1.00 %, Temperature -40.0 °F |
ISO 527 | |||
82.0 MPa @Strain 3.00 %, Temperature 40.0 °C |
11900 psi @Strain 3.00 %, Temperature 104 °F |
ISO 527 | |||
85.0 MPa @Strain 4.00 %, Temperature 40.0 °C |
12300 psi @Strain 4.00 %, Temperature 104 °F |
ISO 527 | |||
142 MPa @Strain 2.00 %, Temperature -40.0 °C |
20600 psi @Strain 2.00 %, Temperature -40.0 °F |
ISO 527 | |||
175 MPa @Strain 3.00 %, Temperature -40.0 °C |
25400 psi @Strain 3.00 %, Temperature -40.0 °F |
ISO 527 | |||
Elongation at Break | 3.0 % | 3.0 % | 5mm/min; ISO 527 | ||
Modulus of Elasticity | 7.10 GPa | 1030 ksi | ISO 527-2 | ||
Flexural Strength | 170 MPa | 24700 psi | ISO 178 | ||
Charpy Impact Unnotched | 5.80 J/cm² | 27.6 ft-lb/in² | ISO 179/1eU | ||
Charpy Impact, Notched | 0.800 J/cm² | 3.81 ft-lb/in² | ISO 179/1eA | ||
Dart Drop, Total Energy | 5.00 J | 3.69 ft-lb | ISO 6603-1 | ||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+16 ohm-cm | 1.00e+16 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+13 ohm | 1.00e+13 ohm | IEC 60093 | ||
Dielectric Constant | 3.7 @Frequency 100 Hz |
3.7 @Frequency 100 Hz |
IEC 60250 | ||
3.7 @Frequency 1.00e+6 Hz |
3.7 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Dielectric Strength | 100 kV/mm | 2540 kV/in | IEC 112 | ||
Dissipation Factor | 0.0012 @Frequency 100 Hz |
0.0012 @Frequency 100 Hz |
IEC 60250 | ||
0.015 @Frequency 1.00e+6 Hz |
0.015 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 150 V | 150 V | Test Solution B; IEC 112 | ||
300 V | 300 V | Test solution A; IEC 60112 | |||
Thermal Properties | Metric | English | Comments | ||
CTE, linear, Parallel to Flow | 3.00 - 4.00 µm/m-°C @Temperature 23.0 - 80.0 °C |
1.67 - 2.22 µin/in-°F @Temperature 73.4 - 176 °F |
DIN 53752 | ||
Specific Heat Capacity | 1.60 J/g-°C | 0.382 BTU/lb-°F | IEC 1006 | ||
Thermal Conductivity | 0.250 W/m-K | 1.74 BTU-in/hr-ft²-°F | DIN 52612 | ||
Melting Point | 220 - 250 °C | 428 - 482 °F | ISO 11357-3 | ||
Maximum Service Temperature, Air | 135 °C | 275 °F | at 50% loss of tensile strength after 20000h; IEC 216-1 | ||
150 °C | 302 °F | at 50% loss of tensile strength after 5000h; IEC 216-1 | |||
210 °C | 410 °F | ||||
Deflection Temperature at 0.46 MPa (66 psi) | 220 °C | 428 °F | ISO 75-2 | ||
Deflection Temperature at 1.8 MPa (264 psi) | 205 °C | 401 °F | ISO 75-2 | ||
Flammability, UL94 | HB @Thickness 1.60 mm |
HB @Thickness 0.0630 in |
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HB @Thickness 0.800 mm |
HB @Thickness 0.0315 in |
||||
Flame Spread | <= 100 mm/min | <= 3.94 in/min | DIN 75200 | ||
Glow Wire Test | <= 750 °C @Thickness 3.00 mm |
<= 1380 °F @Thickness 0.118 in |
IEC 695 | ||
Processing Properties | Metric | English | Comments | ||
Melt Temperature | 260 °C | 500 °F | for shrinkage test | ||
250 - 275 °C | 482 - 527 °F | Injection molding | |||
Mold Temperature | 60.0 - 100 °C | 140 - 212 °F | |||
80.0 °C | 176 °F | for shrinkage test | |||
De |
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Color | Natural, Colored, Black and Special Colors | ||||
Commercial Status | North America and Europe | ||||
Form | Pellets | ||||
Impact Modified | No | ||||
NSF Std. 61 | Yes | ||||
Primary Processing Technique | Injection Molding | ||||
Processing | Injection Molding | ||||
Special characteristic | Heat stabilized or stable to heat | ||||
Light stabilized or stable to light | |||||
Lubricant | |||||
Release agent | |||||
U.V. stabilized or stable to weather |
概述
聚对苯二甲酸丁二醇酯,英文名polybutylene terephthalate(简称PBT),属于聚酯系列,是由1.4-pbt丁二醇(1.4-Butylene glycol)与对苯二甲酸(TPA)或者对苯二甲酸酯(DMT)聚缩合而成,并经由混炼程序制成的乳白色半透明到不透明、结晶型热塑性聚酯树脂。与PET一起统称为热塑性聚酯,或饱和聚酯。
化学物质
⒈优良的机械性能,机械强度高,耐疲劳性和尺寸稳定好。蠕变也小,这些性能在高温条件下也极少有变化。
⒉生产PBT所消耗的能量是工程塑料中最低的的,这对于世界范围内能源紧缺的情况下,具有十分重要的意义。
⒊耐热老化性优异,增强后的UL温度指数达到120~140℃,此外,户外长期老化性也很好。
⒋耐溶剂好,无应力开裂。
⒌PBT易于阻燃,可达UL94V-0级,由于与阻燃剂亲和性能好,所以容易开发反应型或添加型的阻燃品级。阻燃产品在电子电器工业中获得广泛应用。
⒍PBT遇水易分解,在高温、高湿环境下使用需谨慎。
⒎优良的电气性能,体积电阻率及介电强度高,耐电弧性优良,吸湿性极小,在潮湿及高温环境下,也能保持电性能稳定,是制造电子、电器零件的理想材料。
⒏易成型加工和二次加工,易用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材料要求低,在加工薄壁制件时仅需几秒钟,对大部件也只需40-60s即可。
PBT中文名称聚对苯二甲酸丁酯,简称饱和聚酯,系高结晶性热可塑性塑料。
优点:1、机械性质安定抗张强度与抗张模数和尼龙相似;2、摩擦系数小有自润性;
3、吸水率低;4、电气性质优良;5、尺寸安定性良好;6、耐药品性、耐油性极佳。
用途:1、电子电器:无熔线断电器、电磁开关、驰返变压器、家电把手、连接器、外壳等;
2、汽车:车门把手、保险杆、分电盘盖、挡泥板、导线护壳、轮圈盖等;
3、工业零件:OA风扇、键盘、钓具卷线器、零件、灯罩等。
特点:PBT为乳白色半透明到不透明、结晶型热塑性聚酯。具有高耐热性、韧性、耐疲劳性,自润滑、低摩擦系数,耐候性、吸水率低,仅为0.1%,在潮湿环境中仍保持各种物性(包括电性能),电绝缘性,但介电损耗大。耐热水、碱类、酸类、油类、但易受卤化烃侵蚀,耐水解性差,低温下可迅速结晶,成型性良好。PBT 结晶速度快,最适宜加工方法为注塑,其他方法还有挤出、吹塑、涂覆和各种二次加工成型,成型前需预干燥,水分含量要降至0.02%。PBT(增强、改性PBT)主要用于汽车、电子电器、工业机械和聚合物合金、共混工业。如作为汽车中的分配器、车体部件、点火器线圈骨架、绝缘盖、排气系统零部件、摩托车点火器、电子电器工业中如电视机的偏转线圈,显像管和电位器支架,伴音输出变压器骨架,适配器骨架,开关接插件、电风扇、电冰箱、洗衣机电机端盖、轴套.
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