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Rulon Bearings

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Celanese Vandar® 2500 PBT, Unfilled
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT)
Material Notes: Vandar 2500 is an unfilled polyester alloy which exhibits excellent toughness and impact strength. It is specially designed to offer excellent chemical resistance, good colorability and dimensional stability.

Information provided by Celanese
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Physical PropertiesOriginal ValueComments
Specific Gravity 1.25 g/ccASTM D792
Density 1.25 g/ccISO 1183
Water Absorption 0.10 %
@Temperature 22.8 °C		24hr immersion; ASTM D570
Linear Mold Shrinkage, Flow 0.017 - 0.022 cm/cmASTM D955
 0.017 - 0.022 cm/cmISO 294-4
Linear Mold Shrinkage, Transverse 0.017 - 0.022 cm/cmISO 294-4
Melt Flow 12 g/10 minASTM D1238
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell M 104ISO 2039-2
Tensile Strength, Yield 35.0 MPa50mm/min; ISO 527-2/1A
 4900 psiASTM D638
Elongation at Break >= 50 %
 100 %ASTM D638
Elongation at Yield 5.0 %50mm/min; ISO 527-2/1A
Tensile Modulus 1450 MPa50mm/min; ISO 527-2/1A
Flexural Strength 50.0 MPaISO 178
 7200 psiASTM D790
Flexural Modulus 1500 MPaISO 178
 210000 psiASTM D790
Izod Impact, Notched NBASTM D256
 2.50 ft-lb/in
@Temperature -28.9 °C		ASTM D256
Izod Impact, Notched (ISO) NBISO 180/1A
Charpy Impact Unnotched 203 kJ/m²ISO 179/1eU
 168 kJ/m²
@Temperature -30.0 °C		ISO 179/1eU
Charpy Impact, Notched 88.0 kJ/m²ISO 179/1eA
 9.00 kJ/m²
@Temperature -30.0 °C		ISO 179/1eA
 
Thermal PropertiesOriginal ValueComments
CTE, linear, Parallel to Flow 130 µm/m-°CISO 11359-2
CTE, linear, Transverse to Flow 134 µm/m-°CISO 11359-2
Melting Point 225 °C10°C/min; ISO 11357-1,-2,-3
 437 °FASTM D3418
Deflection Temperature at 0.46 MPa (66 psi) 125 °CISO 75-1, -2
 260 °FASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 50.0 °CISO 75-1, -2
 125 °FASTM D648
Glass Transition Temp, Tg 70.0 °CISO 11357-1,-2,-3
Flammability, UL94 HB
 
Processing PropertiesOriginal ValueComments
Processing Temperature 65.0 - 96.0 °Ccavity
 250 - 260 °Chot runner
Feed Temperature 230 - 240 °C
Zone 1 230 - 240 °C
Zone 2 235 - 250 °C
Zone 3 235 - 250 °C
Zone 4 240 - 260 °C
Die Temperature 240 - 260 °C
Melt Temperature 235 - 260 °C
 260 °CISO 294
Mold Temperature 82.0 °CISO 294
Injection Velocity 300 mm/secISO 294
Drying Temperature 120 - 130 °C
Dry Time 4.00 hour
Moisture Content <= 0.020 %
Hold Pressure 86.0 MPaISO 294
 
Descriptive Properties
Injection moldingYes
Injection speedmedium-fast
Processing conditions acc. ISO7792-2

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