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Physical Properties | Metric | English | Comments | ||
---|---|---|---|---|---|
Density | 1.11 g/cc | 0.0401 lb/in³ | |||
1.31 g/cc | 0.0473 lb/in³ | ISO 1183 | |||
Water Absorption | 0.40 % @Thickness 2.00 mm |
0.40 % @Thickness 0.0787 in |
Sim. to ISO 62 | ||
Moisture Absorption | 0.200 % @Thickness 2.00 mm |
0.200 % @Thickness 0.0787 in |
Sim. to ISO 62 | ||
Viscosity | 88500 cP @Shear Rate 5000 1/s, Temperature 260 °C |
88500 cP @Shear Rate 5000 1/s, Temperature 500 °F |
ISO 11403-1 -2 | ||
98730 cP @Shear Rate 5000 1/s, Temperature 250 °C |
98730 cP @Shear Rate 5000 1/s, Temperature 482 °F |
ISO 11403-1 -2 | |||
109800 cP @Shear Rate 5000 1/s, Temperature 240 °C |
109800 cP @Shear Rate 5000 1/s, Temperature 464 °F |
ISO 11403-1 -2 | |||
239900 cP @Shear Rate 500 1/s, Temperature 260 °C |
239900 cP @Shear Rate 500 1/s, Temperature 500 °F |
ISO 11403-1 -2 | |||
303800 cP @Shear Rate 500 1/s, Temperature 250 °C |
303800 cP @Shear Rate 500 1/s, Temperature 482 °F |
ISO 11403-1 -2 | |||
384600 cP @Shear Rate 500 1/s, Temperature 240 °C |
384600 cP @Shear Rate 500 1/s, Temperature 464 °F |
ISO 11403-1 -2 | |||
Viscosity Test | 130 cm³/g | 130 cm³/g | ISO 307 1157 1628 | ||
Linear Mold Shrinkage, Flow | 0.017 cm/cm | 0.017 in/in | ISO 294-4 2577 | ||
Linear Mold Shrinkage, Transverse | 0.016 cm/cm | 0.016 in/in | ISO 294-4 2577 | ||
Melt Flow | 19.1 g/10 min @Load 2.16 kg, Temperature 250 °C |
19.1 g/10 min @Load 4.76 lb, Temperature 482 °F |
ISO 1133 | ||
Mechanical Properties | Metric | English | Comments | ||
Tensile Stress | 2.81 MPa @Strain 1.14 %, Temperature 150 °C |
408 psi @Strain 1.14 %, Temperature 302 °F |
ISO 11403-1 -2 | ||
2.88 MPa @Strain 0.190 %, Temperature 40.0 °C |
418 psi @Strain 0.190 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
4.32 MPa @Strain 1.04 %, Temperature 90.0 °C |
627 psi @Strain 1.04 %, Temperature 194 °F |
ISO 11403-1 -2 | |||
6.84 MPa @Strain 4.36 %, Temperature 150 °C |
992 psi @Strain 4.36 %, Temperature 302 °F |
ISO 11403-1 -2 | |||
9.06 MPa @Strain 7.90 %, Temperature 150 °C |
1310 psi @Strain 7.90 %, Temperature 302 °F |
ISO 11403-1 -2 | |||
9.31 MPa @Strain 0.350 %, Temperature 23.0 °C |
1350 psi @Strain 0.350 %, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
11.7 MPa @Strain 3.92 %, Temperature 90.0 °C |
1700 psi @Strain 3.92 %, Temperature 194 °F |
ISO 11403-1 -2 | |||
16.07 MPa @Strain 6.99 %, Temperature 90.0 °C |
2331 psi @Strain 6.99 %, Temperature 194 °F |
ISO 11403-1 -2 | |||
17.7 MPa @Strain 0.630 %, Temperature 0.000 °C |
2570 psi @Strain 0.630 %, Temperature 32.0 °F |
ISO 11403-1 -2 | |||
18.6 MPa @Strain 10.5 %, Temperature 90.0 °C |
2700 psi @Strain 10.5 %, Temperature 194 °F |
ISO 11403-1 -2 | |||
21.96 MPa @Strain 2.10 %, Temperature 40.0 °C |
3185 psi @Strain 2.10 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
25.21 MPa @Strain 0.790 %, Temperature -40.0 °C |
3656 psi @Strain 0.790 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
25.36 MPa @Strain 0.860 %, Temperature -20.0 °C |
3678 psi @Strain 0.860 %, Temperature -4.00 °F |
ISO 11403-1 -2 | |||
30.59 MPa @Strain 5.18 %, Temperature 40.0 °C |
4437 psi @Strain 5.18 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
34.8 MPa @Strain 8.60 %, Temperature 40.0 °C |
5050 psi @Strain 8.60 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
42.45 MPa @Strain 1.89 %, Temperature 23.0 °C |
6157 psi @Strain 1.89 %, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
46.64 MPa @Strain 1.82 %, Temperature 0.000 °C |
6765 psi @Strain 1.82 %, Temperature 32.0 °F |
ISO 11403-1 -2 | |||
53.41 MPa @Strain 1.85 %, Temperature -40.0 °C |
7746 psi @Strain 1.85 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
57.12 MPa @Strain 2.19 %, Temperature -20.0 °C |
8285 psi @Strain 2.19 %, Temperature -4.00 °F |
ISO 11403-1 -2 | |||
66.69 MPa @Strain 3.74 %, Temperature 0.000 °C |
9673 psi @Strain 3.74 %, Temperature 32.0 °F |
ISO 11403-1 -2 | |||
73.3 MPa @Strain 2.85 %, Temperature -40.0 °C |
10600 psi @Strain 2.85 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
78.69 MPa @Strain 4.18 %, Temperature -20.0 °C |
11410 psi @Strain 4.18 %, Temperature -4.00 °F |
ISO 11403-1 -2 | |||
88.18 MPa @Strain 4.02 %, Temperature -40.0 °C |
12790 psi @Strain 4.02 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
5.00 MPa @Strain 0.200 %, Time 36000 sec |
725 psi @Strain 0.200 %, Time 10.0 hour |
isochronous; ISO 11403-1 -2 | |||
5.00 MPa @Strain 0.220 %, Time 360000 sec |
725 psi @Strain 0.220 %, Time 100 hour |
isochronous; ISO 11403-1 -2 | |||
5.00 MPa @Strain 0.260 %, Time 3.60e+6 sec |
725 psi @Strain 0.260 %, Time 1000 hour |
isochronous; ISO 11403-1 -2 | |||
5.00 MPa @Strain 0.397 %, Time 3.60e+7 sec |
725 psi @Strain 0.397 %, Time 10000 hour |
isochronous; ISO 11403-1 -2 | |||
5.00 MPa @Strain 0.190 %, Time 3600 sec |
725 psi @Strain 0.190 %, Time 1.00 hour |
isochronous; ISO 11403-1 -2 | |||
20.0 MPa @Strain 2.61 %, Time 3.60e+7 sec |
2900 psi @Strain 2.61 %, Time 10000 hour |
isochronous; ISO 11403-1 -2 | |||
30.0 MPa @Strain 4.17 %, Time 3.60e+6 sec |
4350 psi @Strain 4.17 %, Time 1000 hour |
isochronous; ISO 11403-1 -2 | |||
Tensile Strength, Yield | 58.0 MPa | 8410 psi | ISO 527-1/-2 | ||
Elongation at Break | 40 % | 40 % | Nominal; ISO 527-1/-2 | ||
Elongation at Yield | 7.0 % | 7.0 % | ISO 527-1/-2 | ||
Tensile Modulus | 2.60 GPa | 377 ksi | ISO 527-1/-2 | ||
0.2273 GPa @Temperature 135 °C |
32.97 ksi @Temperature 275 °F |
Dynamic; ISO 11403-1 -2 | |||
0.242 GPa @Temperature 120 °C |
35.1 ksi @Temperature 248 °F |
ISO 11403-1 -2 | |||
0.4473 GPa @Temperature 75.0 °C |
64.88 ksi @Temperature 167 °F |
Dynamic; ISO 11403-1 -2 | |||
1.259 GPa @Temperature 40.0 °C |
182.6 ksi @Temperature 104 °F |
ISO 11403-1 -2 | |||
1.655 GPa @Temperature 45.0 °C |
240.0 ksi @Temperature 113 °F |
Dynamic; ISO 11403-1 -2 | |||
2.621 GPa @Temperature 5.00 °C |
380.1 ksi @Temperature 41.0 °F |
Dynamic; ISO 11403-1 -2 | |||
2.783 GPa @Temperature -20.0 °C |
403.6 ksi @Temperature -4.00 °F |
Dynamic; ISO 11403-1 -2 | |||
3.004 GPa @Temperature -45.0 °C |
435.7 ksi @Temperature -49.0 °F |
Dynamic; ISO 11403-1 -2 | |||
3.29 GPa @Temperature -60.0 °C |
477 ksi @Temperature -76.0 °F |
Dynamic; ISO 11403-1 -2 | |||
3.291 GPa @Temperature -40.0 °C |
477.3 ksi @Temperature -40.0 °F |
ISO 11403-1 -2 | |||
Flexural Strength | 85.0 MPa | 12300 psi | ISO 178 | ||
Flexural Modulus | 2.20 GPa | 319 ksi | ISO 178 | ||
Secant Modulus | 0.515 GPa @Strain 6.27 %, Temperature 40.0 °C |
74.7 ksi @Strain 6.27 %, Temperature 104 °F |
ISO 11403-1 -2 | ||
1.05 GPa @Strain 2.10 %, Temperature 40.0 °C |
152 ksi @Strain 2.10 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
1.52 GPa @Strain 0.190 %, Temperature 40.0 °C |
220 ksi @Strain 0.190 %, Temperature 104 °F |
ISO 11403-1 -2 | |||
1.90 GPa @Strain 4.96 %, Temperature -40.0 °C |
276 ksi @Strain 4.96 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
2.25 GPa @Strain 1.89 %, Temperature 23.0 °C |
326 ksi @Strain 1.89 %, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2.45 GPa @Strain 3.22 %, Temperature -40.0 °C |
356 ksi @Strain 3.22 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
2.56 GPa @Strain 1.82 %, Temperature 0.000 °C |
372 ksi @Strain 1.82 %, Temperature 32.0 °F |
ISO 11403-1 -2 | |||
2.61 GPa @Strain 2.19 %, Temperature -20.0 °C |
378 ksi @Strain 2.19 %, Temperature -4.00 °F |
ISO 11403-1 -2 | |||
2.66 GPa @Strain 0.350 %, Temperature 23.0 °C |
386 ksi @Strain 0.350 %, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2.81 GPa @Strain 0.630 %, Temperature 0.000 °C |
407 ksi @Strain 0.630 %, Temperature 32.0 °F |
ISO 11403-1 -2 | |||
2.89 GPa @Strain 1.85 %, Temperature -40.0 °C |
419 ksi @Strain 1.85 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
2.95 GPa @Strain 0.860 %, Temperature -20.0 °C |
428 ksi @Strain 0.860 %, Temperature -4.00 °F |
ISO 11403-1 -2 | |||
3.19 GPa @Strain 0.790 %, Temperature -40.0 °C |
463 ksi @Strain 0.790 %, Temperature -40.0 °F |
ISO 11403-1 -2 | |||
Izod Impact, Notched (ISO) | 4.50 kJ/m² | 2.14 ft-lb/in² | ISO 180/1A | ||
Izod Impact, Unnotched (ISO) | NB | NB | ISO 180/1U | ||
Charpy Impact Unnotched | NB | NB | ISO 179/1eU | ||
NB @Temperature -30.0 °C |
NB @Temperature -22.0 °F |
ISO 179/1eU | |||
Charpy Impact, Notched | 0.500 J/cm² | 2.38 ft-lb/in² | ISO 179/1eA | ||
0.400 J/cm² @Temperature -30.0 °C |
1.90 ft-lb/in² @Temperature -22.0 °F |
ISO 179/1eA | |||
Tensile Creep Modulus, 1 hour | 160 MPa @Pressure 15.0 MPa, Temperature 110 °C |
23200 psi @Pressure 2180 psi, Temperature 230 °F |
ISO 11403-1 -2 | ||
167 MPa @Pressure 14.0 MPa, Temperature 110 °C |
24200 psi @Pressure 2030 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
186 MPa @Pressure 12.0 MPa, Temperature 110 °C |
27000 psi @Pressure 1740 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
210 MPa @Pressure 10.0 MPa, Temperature 110 °C |
30500 psi @Pressure 1450 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
234 MPa @Pressure 8.00 MPa, Temperature 110 °C |
33900 psi @Pressure 1160 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
250 MPa @Pressure 25.0 MPa, Temperature 60.0 °C |
36300 psi @Pressure 3630 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
253 MPa @Pressure 6.00 MPa, Temperature 110 °C |
36700 psi @Pressure 870 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
267 MPa @Pressure 4.00 MPa, Temperature 110 °C |
38700 psi @Pressure 580 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
276 MPa @Pressure 2.00 MPa, Temperature 110 °C |
40000 psi @Pressure 290 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
301 MPa @Pressure 20.0 MPa, Temperature 60.0 °C |
43600 psi @Pressure 2900 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
370.37 MPa @Pressure 15.0 MPa, Temperature 60.0 °C |
53718 psi @Pressure 2180 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
391 MPa @Pressure 10.0 MPa, Temperature 60.0 °C |
56700 psi @Pressure 1450 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
400 MPa @Pressure 5.00 MPa, Temperature 60.0 °C |
58000 psi @Pressure 725 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
2260 MPa @Pressure 30.0 MPa, Temperature 23.0 °C |
327000 psi @Pressure 4350 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2290 MPa @Pressure 25.0 MPa, Temperature 23.0 °C |
333000 psi @Pressure 3630 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2350 MPa @Pressure 20.0 MPa, Temperature 23.0 °C |
341000 psi @Pressure 2900 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2420 MPa @Pressure 15.0 MPa, Temperature 23.0 °C |
351000 psi @Pressure 2180 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2520 MPa @Pressure 10.0 MPa, Temperature 23.0 °C |
365000 psi @Pressure 1450 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2630 MPa @Pressure 5.00 MPa, Temperature 23.0 °C |
382000 psi @Pressure 725 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
2600 MPa @Time 3600 sec |
377000 psi @Time 1.00 hour |
ISO 899-1 | |||
Tensile Creep Modulus, 1000 hours | 120 MPa @Pressure 15.0 MPa, Temperature 110 °C |
17400 psi @Pressure 2180 psi, Temperature 230 °F |
ISO 11403-1 -2 | ||
127 MPa @Pressure 14.0 MPa, Temperature 110 °C |
18400 psi @Pressure 2030 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
144.79 MPa @Pressure 12.0 MPa, Temperature 110 °C |
21000 psi @Pressure 1740 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
170 MPa @Pressure 10.0 MPa, Temperature 110 °C |
24700 psi @Pressure 1450 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
180 MPa @Pressure 25.0 MPa, Temperature 60.0 °C |
26100 psi @Pressure 3630 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
199 MPa @Pressure 8.00 MPa, Temperature 110 °C |
28900 psi @Pressure 1160 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
230 MPa @Pressure 6.00 MPa, Temperature 110 °C |
33300 psi @Pressure 870 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
231 MPa @Pressure 20.0 MPa, Temperature 60.0 °C |
33500 psi @Pressure 2900 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
257 MPa @Pressure 4.00 MPa, Temperature 110 °C |
37300 psi @Pressure 580 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
277 MPa @Pressure 2.00 MPa, Temperature 110 °C |
40100 psi @Pressure 290 psi, Temperature 230 °F |
ISO 11403-1 -2 | |||
310 MPa @Pressure 15.0 MPa, Temperature 60.0 °C |
44900 psi @Pressure 2180 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
330 MPa @Pressure 10.0 MPa, Temperature 60.0 °C |
47900 psi @Pressure 1450 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
340 MPa @Pressure 5.00 MPa, Temperature 60.0 °C |
49300 psi @Pressure 725 psi, Temperature 140 °F |
ISO 11403-1 -2 | |||
719 MPa @Pressure 30.0 MPa, Temperature 23.0 °C |
104000 psi @Pressure 4350 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
869 MPa @Pressure 25.0 MPa, Temperature 23.0 °C |
126000 psi @Pressure 3630 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
1140 MPa @Pressure 20.0 MPa, Temperature 23.0 °C |
166000 psi @Pressure 2900 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
1562.5 MPa @Pressure 15.0 MPa, Temperature 23.0 °C |
226620 psi @Pressure 2180 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
1790 MPa @Pressure 10.0 MPa, Temperature 23.0 °C |
259000 psi @Pressure 1450 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
1920 MPa @Pressure 5.00 MPa, Temperature 23.0 °C |
279000 psi @Pressure 725 psi, Temperature 73.4 °F |
ISO 11403-1 -2 | |||
1800 MPa @Time 3.60e+6 sec |
261000 psi @Time 1000 hour |
ISO 899-1 | |||
Electrical Properties | Metric | English | Comments | ||
Volume Resistivity | >= 1.00e+15 ohm-cm | >= 1.00e+15 ohm-cm | IEC 60093 | ||
Surface Resistance | 1.00e+12 ohm | 1.00e+12 ohm | IEC 60093 | ||
Dielectric Constant | 3.2 @Frequency 1.00e+6 Hz |
3.2 @Frequency 1.00e+6 Hz |
IEC 60250 | ||
3.8 @Frequency 100 Hz |
3.8 @Frequency 100 Hz |
IEC 60250 | |||
Dielectric Strength | 26.0 kV/mm | 660 kV/in | IEC 60243-1 | ||
Dissipation Factor | 0.0020 @Frequency 100 Hz |
0.0020 @Frequency 100 Hz |
IEC 60250 | ||
0.020 @Frequency 1.00e+6 Hz |
0.020 @Frequency 1.00e+6 Hz |
IEC 60250 | |||
Comparative Tracking Index | 600 V | 600 V | IEC 60112 | ||
Thermal Properties | Metric | English | Comments | ||
CTE, linear, Parallel to Flow | 110 µm/m-°C | 61.1 µin/in-°F | ISO 11359-1/-2 | ||
CTE, linear, Transverse to Flow | 120 µm/m-°C | 66.7 µin/in-°F | ISO 11359-1/-2 | ||
Specific Heat Capacity | 2.11 J/g-°C | 0.504 BTU/lb-°F | |||
Thermal Conductivity | 0.210 W/m-K | 1.46 BTU-in/hr-ft²-°F | of melt | ||
Melting Point | 225 °C | 437 °F | 10°C/min; ISO 11357-1/-3 | ||
Deflection Temperature at 0.46 MPa (66 psi) | 115 °C | 239 °F | ISO 75-1/-2 | ||
180 °C | 356 °F | annealed; ISO 75-1/-2 | |||
Deflection Temperature at 1.8 MPa (264 psi) | 50.0 °C | 122 °F | ISO 75-1/-2 | ||
60.0 °C | 140 °F | annealed; ISO 75-1/-2 | |||
Vicat Softening Point | 175 °C | 347 °F | 50°C/h 50N; ISO 306 | ||
Glass Transition Temp, Tg | 55.0 °C | 131 °F | 10°C/min; ISO 11357-1/-2 | ||
Flammability, UL94 | HB @Thickness 1.50 mm |
HB @Thickness 0.0591 in |
IEC 60695-11-10 | ||
HB @Thickness 0.800 mm |
HB @Thickness 0.0315 in |
IEC 60695-11-10 | |||
Oxygen Index | 22 % | 22 % | ISO 4589-1/-2 | ||
De |
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Additives | Release agent | ||||
Delivery form | Pellets | ||||
Fogging | 0 mg | ISO 6452; G-value (condensate) | |||
Odour | class 3 | VDA 270; DS | |||
Part Marking Code | >PBT< | ISO 11469 | |||
Processing | Injection Moulding | ||||
Regional Availability | Asia Pacific | ||||
Europe | |||||
Global | |||||
Near East/Africa | |||||
North America | |||||
South and Central America | |||||
Resin Identification | PBT | ||||
Thermal desorption analysis of organic emissions | 1 µg/g | VDA 278; AMax | |||
UL recognition | UL |
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。
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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