Overview of materials for Polybutylene Terephthalate (PBT), Unreinforced, Molded

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Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), Unreinforced, Molded

Material Notes:

This property data is a summary of similar materials in the MatWeb database for the category "Polybutylene Terephthalate (PBT), Unreinforced, Molded". Each property range of values reported is minimum and maximum values of appropriate MatWeb entries. The comments report the average value, and number of data points used to calculate the average. The values are not necessarily typical of any specific grade, especially less common values and those that can be most affected by additives or processing methods.

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Physical Properties	Metric	English	Comments

Density	1.06 - 1.58 g/cc	0.0383 - 0.0571 lb/in³	Average value: 1.31 g/cc Grade Count:214
Water Absorption	0.000 - 0.650 %	0.000 - 0.650 %	Average value: 0.241 % Grade Count:99
Moisture Absorption at Equilibrium	0.0100 - 1.09 %	0.0100 - 1.09 %	Average value: 0.183 % Grade Count:72
Water Absorption at Saturation	0.0800 - 7.80 %	0.0800 - 7.80 %	Average value: 0.625 % Grade Count:54
Viscosity	1.60 - 1.20e+6 cP	1.60 - 1.20e+6 cP	Average value: 336000 cP Grade Count:14
	400000 - 400000 cP @Temperature 260 - 260 °C	400000 - 400000 cP @Temperature 500 - 500 °F	Average value: 400000 cP Grade Count:1
	400000 - 400000 cP @Shear Rate 1000 - 1000 1/s	400000 - 400000 cP @Shear Rate 1000 - 1000 1/s	Average value: 400000 cP Grade Count:1
Viscosity Measurement	0.795 - 1.85	0.795 - 1.85	Average value: 1.08 Grade Count:4
Viscosity Test	105 - 180 cm³/g	105 - 180 cm³/g	Average value: 135 cm³/g Grade Count:16
Linear Mold Shrinkage	0.00100 - 0.0360 cm/cm	0.00100 - 0.0360 in/in	Average value: 0.0152 cm/cm Grade Count:159
Linear Mold Shrinkage, Transverse	0.00160 - 0.0300 cm/cm	0.00160 - 0.0300 in/in	Average value: 0.0155 cm/cm Grade Count:97
Melt Flow	3.00 - 236 g/10 min	3.00 - 236 g/10 min	Average value: 33.3 g/10 min Grade Count:109

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell M	72.0 - 90.0	72.0 - 90.0	Average value: 77.1 Grade Count:17
Hardness, Rockwell R	114 - 120	114 - 120	Average value: 118 Grade Count:33
Hardness, Shore D	40.0 - 88.0	40.0 - 88.0	Average value: 75.0 Grade Count:24
Ball Indentation Hardness	50.0 - 165 MPa	7250 - 23900 psi	Average value: 145 MPa Grade Count:11
Tensile Strength, Ultimate	17.0 - 117 MPa	2470 - 17000 psi	Average value: 50.4 MPa Grade Count:82
	12.0 - 93.0 MPa @Temperature -40.0 - 149 °C	1740 - 13500 psi @Temperature -40.0 - 300 °F	Average value: 35.6 MPa Grade Count:4
Tensile Strength, Yield	27.0 - 167 MPa	3920 - 24200 psi	Average value: 55.2 MPa Grade Count:179
	15.0 - 100.663 MPa @Temperature -40.0 - 150 °C	2180 - 14600.0 psi @Temperature -40.0 - 302 °F	Average value: 57.2 MPa Grade Count:6
Elongation at Break	2.00 - 300 %	2.00 - 300 %	Average value: 77.6 % Grade Count:199
	8.00 - 300 % @Temperature -40.0 - 150 °C	8.00 - 300 % @Temperature -40.0 - 302 °F	Average value: 193 % Grade Count:3
Elongation at Yield	2.60 - 70.0 %	2.60 - 70.0 %	Average value: 7.26 % Grade Count:121
	4.40 - 55.0 % @Temperature -40.0 - 150 °C	4.40 - 55.0 % @Temperature -40.0 - 302 °F	Average value: 16.2 % Grade Count:6
Modulus of Elasticity	0.0280 - 4.60 GPa	4.06 - 667 ksi	Average value: 2.42 GPa Grade Count:128
	0.100 - 3.40 GPa @Temperature -40.0 - 150 °C	14.5 - 493 ksi @Temperature -40.0 - 302 °F	Average value: 1.26 GPa Grade Count:2
Flexural Modulus	1.42 - 17.5 GPa	206 - 2540 ksi	Average value: 2.64 GPa Grade Count:151
	0.234 - 3.50 GPa @Temperature -40.0 - 150 °C	33.9 - 508 ksi @Temperature -40.0 - 302 °F	Average value: 0.983 GPa Grade Count:5
Flexural Yield Strength	48.0 - 239 MPa	6960 - 34700 psi	Average value: 85.6 MPa Grade Count:140
	8.00 - 120 MPa @Temperature -40.0 - 150 °C	1160 - 17400 psi @Temperature -40.0 - 302 °F	Average value: 42.1 MPa Grade Count:4
Compressive Yield Strength	68.9 - 75.0 MPa	10000 - 10900 psi	Average value: 74.0 MPa Grade Count:8
Izod Impact, Unnotched	6.94 J/cm - NB	13.0 ft-lb/in - NB	Average value: 102 J/cm Grade Count:36
	32.04 J/cm - NB @Temperature -40.0 - -30.0 °C	60.02 ft-lb/in - NB @Temperature -40.0 - -22.0 °F	Average value: 32.0 J/cm Grade Count:7
Izod Impact, Unnotched (ISO)	40.0 kJ/m² - NB	19.0 ft-lb/in² - NB	Average value: 87.7 kJ/m² Grade Count:26
	35.0 - 130 kJ/m² @Temperature -40.0 - -30.0 °C	16.7 - 61.9 ft-lb/in² @Temperature -40.0 - -22.0 °F	Average value: 77.9 kJ/m² Grade Count:5
	25.0 kJ/m² - NB @Temperature -30.0 - -30.0 °C	11.9 ft-lb/in² - NB @Temperature -22.0 - -22.0 °F	Average value: 77.9 kJ/m² Grade Count:15
	25.0 kJ/m² - NB @Thickness 3.00 - 3.00 mm	11.9 ft-lb/in² - NB @Thickness 0.118 - 0.118 in	Average value: 77.9 kJ/m² Grade Count:15
Charpy Impact Unnotched	2.50 J/cm² - NB	11.9 ft-lb/in² - NB	Average value: 14.7 J/cm² Grade Count:95
	2.50 J/cm² - NB @Temperature -40.0 - 0.000 °C	11.9 ft-lb/in² - NB @Temperature -40.0 - 32.0 °F	Average value: 15.2 J/cm² Grade Count:68
	2.00 J/cm² - NB @Temperature -30.0 - -30.0 °C	9.52 ft-lb/in² - NB @Temperature -22.0 - -22.0 °F	Average value: 15.2 J/cm² Grade Count:16
	2.00 J/cm² - NB @Thickness 4.00 - 4.00 mm	9.52 ft-lb/in² - NB @Thickness 0.157 - 0.157 in	Average value: 15.2 J/cm² Grade Count:16
Charpy Impact, Notched	0.300 - 12.9 J/cm²	1.43 - 61.4 ft-lb/in²	Average value: 1.46 J/cm² Grade Count:124
	0.250 - 2.50 J/cm² @Temperature -40.0 - 0.000 °C	1.19 - 11.9 ft-lb/in² @Temperature -40.0 - 32.0 °F	Average value: 0.615 J/cm² Grade Count:65
	0.200 - 0.400 J/cm² @Temperature -30.0 - -30.0 °C	0.952 - 1.90 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 0.615 J/cm² Grade Count:15
	0.200 - 0.400 J/cm² @Thickness 4.00 - 4.00 mm	0.952 - 1.90 ft-lb/in² @Thickness 0.157 - 0.157 in	Average value: 0.615 J/cm² Grade Count:15
Gardner Impact	36.2 - 43.0 J	26.7 - 31.7 ft-lb	Average value: 40.2 J Grade Count:15
Tensile Impact Strength	65.0 - 160 kJ/m²	30.9 - 76.1 ft-lb/in²	Average value: 112 kJ/m² Grade Count:3
Puncture Energy	2.00 - 45.0 J	1.48 - 33.2 ft-lb	Average value: 23.7 J Grade Count:8
Tensile Creep Modulus, 1 hour	1400 - 2800 MPa	203000 - 406000 psi	Average value: 2160 MPa Grade Count:25
Tensile Creep Modulus, 1000 hours	700 - 1800 MPa	102000 - 261000 psi	Average value: 1380 MPa Grade Count:26
Taber Abrasion, mg/1000 Cycles	9.00	9.00	Average value: 9.00 Grade Count:8
Izod Impact, Notched	0.250 - 11.6 J/cm	0.468 - 21.7 ft-lb/in	Average value: 1.30 J/cm Grade Count:101
	0.260 - 8.01 J/cm @Temperature -40.0 - -20.0 °C	0.487 - 15.0 ft-lb/in @Temperature -40.0 - -4.00 °F	Average value: 1.51 J/cm Grade Count:21
Izod Impact, Notched (ISO)	1.20 - 170 kJ/m²	0.571 - 80.9 ft-lb/in²	Average value: 16.6 kJ/m² Grade Count:76
	4.00 - 6.00 kJ/m² @Temperature -40.0 - -30.0 °C	1.90 - 2.86 ft-lb/in² @Temperature -40.0 - -22.0 °F	Average value: 7.00 kJ/m² Grade Count:7
	2.00 - 28.0 kJ/m² @Temperature -30.0 - 0.000 °C	0.952 - 13.3 ft-lb/in² @Temperature -22.0 - 32.0 °F	Average value: 7.00 kJ/m² Grade Count:27
	2.00 - 28.0 kJ/m² @Thickness 4.00 - 4.00 mm	0.952 - 13.3 ft-lb/in² @Thickness 0.157 - 0.157 in	Average value: 7.00 kJ/m² Grade Count:27

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1.00e+9 - 1.00e+18 ohm-cm	1.00e+9 - 1.00e+18 ohm-cm	Average value: 1.92e+16 ohm-cm Grade Count:121
Surface Resistance	1000 - 2.00e+17 ohm	1000 - 2.00e+17 ohm	Average value: 7.77e+15 ohm Grade Count:90
Dielectric Constant	1.00 - 4.40	1.00 - 4.40	Average value: 3.27 Grade Count:115
Dielectric Strength	14.0 - 31.0 kV/mm	356 - 787 kV/in	Average value: 21.7 kV/mm Grade Count:113
Dissipation Factor	0.000300 - 0.419	0.000300 - 0.419	Average value: 0.0150 Grade Count:108
Arc Resistance	60.0 - 240 sec	60.0 - 240 sec	Average value: 135 sec Grade Count:17
Comparative Tracking Index	150 - 600 V	150 - 600 V	Average value: 528 V Grade Count:102
Hot Wire Ignition, HWI	15.0 - 60.0 sec	15.0 - 60.0 sec	Average value: 36.0 sec Grade Count:10
High Amp Arc Ignition, HAI	15.0 - 120 arcs	15.0 - 120 arcs	Average value: 101 arcs Grade Count:10
High Voltage Arc-Tracking Rate, HVTR	0.000 - 150 mm/min	0.000 - 5.91 in/min	Average value: 64.7 mm/min Grade Count:11

Thermal Properties	Metric	English	Comments
CTE, linear	20.0 - 170 µm/m-°C	11.1 - 94.4 µin/in-°F	Average value: 99.8 µm/m-°C Grade Count:127
	25.2 - 190 µm/m-°C @Temperature 55.0 - 160 °C	14.0 - 106 µin/in-°F @Temperature 131 - 320 °F	Average value: 141 µm/m-°C Grade Count:22
CTE, linear, Transverse to Flow	70.0 - 170 µm/m-°C	38.9 - 94.4 µin/in-°F	Average value: 114 µm/m-°C Grade Count:85
	162 - 200 µm/m-°C @Temperature 55.0 - 160 °C	90.0 - 111 µin/in-°F @Temperature 131 - 320 °F	Average value: 167 µm/m-°C Grade Count:8
Thermal Conductivity	0.159 - 0.270 W/m-K	1.10 - 1.87 BTU-in/hr-ft²-°F	Average value: 0.171 W/m-K Grade Count:10
Melting Point	200 - 230 °C	392 - 446 °F	Average value: 224 °C Grade Count:88
Deflection Temperature at 0.46 MPa (66 psi)	80.0 - 215 °C	176 - 419 °F	Average value: 152 °C Grade Count:169
Deflection Temperature at 1.8 MPa (264 psi)	45.0 - 204 °C	113 - 399 °F	Average value: 61.8 °C Grade Count:200
Deflection Temperature at 8.0 MPa	45.0 - 50.0 °C	113 - 122 °F	Average value: 46.5 °C Grade Count:13
Vicat Softening Point	105 - 220 °C	221 - 428 °F	Average value: 175 °C Grade Count:69
UL RTI, Electrical	75.0 - 140 °C	167 - 284 °F	Average value: 114 °C Grade Count:35
UL RTI, Mechanical with Impact	75.0 - 130 °C	167 - 266 °F	Average value: 104 °C Grade Count:35
UL RTI, Mechanical without Impact	75.0 - 140 °C	167 - 284 °F	Average value: 113 °C Grade Count:35
Flammability, UL94	HB - 5VA	HB - 5VA	Grade Count:159
Oxygen Index	20.0 - 32.0 %	20.0 - 32.0 %	Average value: 23.8 % Grade Count:53
Glow Wire Test	700 - 960 °C	1290 - 1760 °F	Average value: 833 °C Grade Count:33

Optical Properties	Metric	English	Comments
Gardner Color Number	5.00 - 94.0	5.00 - 94.0	Average value: 45.9 Grade Count:7

Processing Properties	Metric	English	Comments
Processing Temperature	174 - 271 °C	345 - 520 °F	Average value: 248 °C Grade Count:85
Rear Barrel Temperature	190 - 250 °C	374 - 482 °F	Average value: 232 °C Grade Count:21
Middle Barrel Temperature	220 - 255 °C	428 - 491 °F	Average value: 239 °C Grade Count:22
Front Barrel Temperature	220 - 260 °C	428 - 500 °F	Average value: 245 °C Grade Count:21
Nozzle Temperature	225 - 260 °C	437 - 500 °F	Average value: 246 °C Grade Count:20
Mold Temperature	10.0 - 160 °C	50.0 - 320 °F	Average value: 79.0 °C Grade Count:74
Injection Velocity	60.0 - 65.0 mm/sec	2.36 - 2.56 in/sec	Average value: 63.0 mm/sec Grade Count:5
Drying Temperature	100 - 140 °C	212 - 284 °F	Average value: 121 °C Grade Count:39
Dry Time	2.00 - 5.00 hour	2.00 - 5.00 hour	Average value: 3.33 hour Grade Count:46
Moisture Content	0.0300 - 0.300 %	0.0300 - 0.300 %	Average value: 0.0777 % Grade Count:26
Injection Pressure	34.3 - 120 MPa	4980 - 17400 psi	Average value: 61.5 MPa Grade Count:14
Back Pressure	0.000 - 18.0 MPa	0.000 - 2610 psi	Average value: 1.61 MPa Grade Count:20
Screw Speed	70.0 - 100 rpm	70.0 - 100 rpm	Average value: 86.7 rpm Grade Count:9

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's disclaimer and terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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