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Covestro Texin® STX Thermoplastic Polyurethanes (TPU)
Categories: Polymer; Thermoplastic; Polyurethane, TP

Material Notes: Characterization: Texin STX resin is an opaque, high performance thermoplastic polyurethane which possesses the stiffness and modulus of standard engineering thermoplastics.

Properties / Applications: Texin STX resin exhibits excellent heat and chemical resistance. Other key attributes of Texin STX TPU include good impact resistance, low moisture absorption, low mold shrinkage, a low coefficient of thermal expansion, and good heat and abrasion resistance. It can be processed by injection molding or extrusion. Typical applications include couplings, valves, fittings, sunglass frames, and housings for personal electronic devices. As with any product, use of Texin STX resin in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.22 g/ccASTM D792
Water Absorption 0.23 %
@Time 86400 sec
ASTM D570
Linear Mold Shrinkage, Flow 0.0050 cm/cm
@Thickness 2.54 mm
ASTM D955
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell M 50ASTM D785
Hardness, Rockwell R 110ASTM D785
Tensile Strength at Break 47.0 MPaASTM D638
Tensile Strength, Yield 62.0 MPaASTM D638
Elongation at Break 85 %ASTM D638
Elongation at Yield 6.8 %Strain at Maximum Stress; ASTM D790
 7.3 %ASTM D638
Tensile Modulus 1930 MPaASTM D638
Flexural Strength 930 MPaASTM D790
Flexural Modulus 2000 MPaASTM D790
 83.0 MPa
@Strain 5.0 %
ASTM D790
Izod Impact, Notched 3.50 ft-lb/in
@Thickness 3.17 mm,
Temperature -30.0 °C
ASTM D256
 16.0 ft-lb/in
@Thickness 3.17 mm,
Temperature 23.0 °C
ASTM D256
Izod Impact, Unnotched 62.0 ft-lb/in
@Thickness 3.17 mm
ASTM D48
 
Thermal PropertiesOriginal ValueComments
CTE, linear 42.0 µin/in-°FASTM D696
Deflection Temperature at 0.46 MPa (66 psi) 80.0 °CASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 73.0 °CASTM D648
Vicat Softening Point 105 °CRate A; ASTM D1525
 
Processing PropertiesOriginal ValueComments
Rear Barrel Temperature 225 - 250 °CExtrusion
 235 - 246 °CInjection
Middle Barrel Temperature 225 - 240 °CExtrusion
 238 - 249 °CInjection
Front Barrel Temperature 225 - 240 °CExtrusion
 238 - 249 °CInjection
Nozzle Temperature 243 - 254 °CInjection
Die Temperature 230 - 240 °CExtrusion
Melt Temperature 230 °CExtrusion
 235 - 250 °CInjection
Mold Temperature 43.0 - 66.0 °CInjection
Injection Pressure 6000 - 14000 psiInjection
Back Pressure <= 800 psiInjection
Cushion <= 0.125 inInjection

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 terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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PCOVEST1000 / 202783

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