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Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.73 g/cc | 0.0625 lb/in³ | ISO 1183 | ||
Water Absorption | 0.40 % | 0.40 % | Saturation; DIN 53495/1L | ||
Moisture Absorption at Equilibrium | 0.20 % | 0.20 % | 23°C; 50% RH | ||
Viscosity Measurement | 97 | 97 | [ml/g]; Viscosity number; ISO 1628 | ||
70 @Temperature 290 °C |
70 @Temperature 554 °F |
20 mins plasticating | |||
75 @Temperature 300 °C |
75 @Temperature 572 °F |
10 mins plasticating | |||
75 @Temperature 280 °C |
75 @Temperature 536 °F |
30 mins plasticating | |||
90 @Temperature 270 °C |
90 @Temperature 518 °F |
30 mins plasticating | |||
95 @Temperature 290 °C |
95 @Temperature 554 °F |
10 mins plasticating | |||
100 @Temperature 260 °C |
100 @Temperature 500 °F |
30 mins plasticating | |||
100 @Temperature 300 °C |
100 @Temperature 572 °F |
5 mins plasticating | |||
105 @Temperature 280 °C |
105 @Temperature 536 °F |
10 mins plasticating | |||
106 @Temperature 250 °C |
106 @Temperature 482 °F |
30 mins plasticating | |||
110 @Temperature 270 °C |
110 @Temperature 518 °F |
10 mins plasticating | |||
115 @Temperature 260 °C |
115 @Temperature 500 °F |
10 mins plasticating | |||
115 @Temperature 240 °C |
115 @Temperature 464 °F |
30 mins plasticating | |||
117 @Temperature 250 °C |
117 @Temperature 482 °F |
10 mins plasticating | |||
120 @Temperature 240 °C |
120 @Temperature 464 °F |
10 mins plasticating | |||
Linear Mold Shrinkage, Flow | 0.0020 cm/cm | 0.0020 in/in | Sheet | ||
Linear Mold Shrinkage, Transverse | 0.0090 cm/cm | 0.0090 in/in | Sheet | ||
Melt Flow | 5.19 g/10 min @Load 2.16 kg, Temperature 250 °C |
5.19 g/10 min @Load 4.76 lb, Temperature 482 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Ball Indentation Hardness | 220 MPa @Load 98.0 kg, Time 30.0 sec |
31900 psi @Load 216 lb, Time 0.00833 hour |
ISO 2039-1 | ||
Tensile Strength, Yield | 140 MPa | 20300 psi | 50 mm/min; ISO 527-2 | ||
Elongation at Yield | 1.5 % | 1.5 % | 50 mm/min; ISO 527-2 | ||
Modulus of Elasticity | 16.0 GPa | 2320 ksi | ISO 527-2 | ||
Charpy Impact Unnotched | 5.50 J/cm² @Temperature 23.0 °C |
26.2 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eU | ||
6.90 J/cm² @Temperature -30.0 °C |
32.8 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eU | |||
Charpy Impact, Notched | 1.10 J/cm² @Temperature 23.0 °C |
5.23 ft-lb/in² @Temperature 73.4 °F |
ISO 179/1eA | ||
Dart Drop, Total Energy | 5.00 J | 3.69 ft-lb | W501 housing; ISO 6603-1 | ||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | 1.00e+16 ohm-cm | 1.00e+16 ohm-cm | IEC 93 | ||
Surface Resistance | 1.00e+13 ohm | 1.00e+13 ohm | IEC 93 | ||
Dielectric Constant | 4.0 @Frequency 1.00e+6 Hz |
4.0 @Frequency 1.00e+6 Hz |
IEC 250 | ||
4.0 @Frequency 100 Hz |
4.0 @Frequency 100 Hz |
IEC 250 | |||
Dielectric Strength | 100 kV/mm | 2540 kV/in | IEC 243/1 | ||
Dissipation Factor | 0.0012 @Frequency 100 Hz |
0.0012 @Frequency 100 Hz |
IEC 250 | ||
0.015 @Frequency 1.00e+6 Hz |
0.015 @Frequency 1.00e+6 Hz |
IEC 250 | |||
Comparative Tracking Index | 125 V | 125 V | Test solution B; IEC 112 | ||
425 V | 425 V | Test solution A; IEC 112 | |||
Thermal Properties | Metric | English | Comments | ||
CTE, linear, Parallel to Flow | 2.00 - 3.00 µm/m-°C @Temperature 23.0 - 80.0 °C |
1.11 - 1.67 µin/in-°F @Temperature 73.4 - 176 °F |
DIN 53752 | ||
Specific Heat Capacity | 1.40 J/g-°C | 0.335 BTU/lb-°F | IEC 1006 | ||
Thermal Conductivity | 0.360 W/m-K | 2.50 BTU-in/hr-ft²-°F | DIN 52612 | ||
Melting Point | 220 - 225 °C | 428 - 437 °F | DSC; ISO 11357-3 | ||
Maximum Service Temperature, Air | 140 °C | 284 °F | at 50% loss of tensile strength after 20000h; IEC 216-1 | ||
160 °C | 320 °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) | 215 °C | 419 °F | ISO 75-2 | ||
Decomposition Temperature | >= 290 °C | >= 554 °F | |||
Flammability, UL94 | HB @Thickness 0.800 mm |
HB @Thickness 0.0315 in |
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HB @Thickness 1.60 mm |
HB @Thickness 0.0630 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 | ||
Processing Temperature | 80.0 °C | 176 °F | Hopper Throat | ||
Zone 1 | 260 °C | 500 °F | Feeding zone | ||
Zone 2 | 265 °C | 509 °F | Compression | ||
Zone 3 | 270 °C | 518 °F | Metering-zone | ||
Zone 4 | 270 °C | 518 °F | Nozzle | ||
Melt Temperature | 260 °C | 500 °F | for shrinkage test | ||
250 - 275 °C | 482 - 527 °F | Injection-molding | |||
270 °C | 518 °F | Optimal | |||
Mold Temperature | 80.0 °C | 176 °F | for shrinkage test, Optimal | ||
80.0 - 120 °C | 176 - 248 °F | ||||
Drying Temperature | 80.0 - 120 °C | 176 - 248 °F | |||
Dry Time | 4 hour | 4 hour | |||
De |
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Color | Natural, Colored, Special Colors and Black | ||||
Commercial Status | Europe | ||||
Ignition Temperature | 350°C | ASTM D1929 | |||
Peripheral Screw Speed | < 0.25 m/s | ||||
Primary Processing Technique | Injection Molding |
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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