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Elmet Technologies

Covestro Texin® 250 Thermoplastic Polyurethanes (TPU)
Categories: Polymer; Thermoplastic; Polyurethane, TP

Material Notes: Characterization: Texin 250 resin is an aromatic polyester-based thermoplastic polyurethane with a Shore hardness of approximately 50D. It is processed primarily by extrusion and blow molding but can also be used for injection molding.

Properties / Applications: Texin 250 resin is characterized by a low gel content, good clarity, good abrasion resistance, and very good chemical resistance to oils, solvents, and other nonaqueous solutions. Texin 250 natural color resin complies with FDA food-contact regulations 21 CFR 177.1680 (Polyurethane Resins) and 177.2600 (Rubber Articles Intended for Repeated Use), subject to the limitations of these and any other applicable regulations. A major feature of Texin 250 resin is its wide processing window, which allows for ease of film and sheet production. Typical applications include belting, hose, cable jackets, hose jackets, athletic soles, film, tubing, and extruded profiles. As with any product, use of Texin 250 resin in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

Information provided by Covestro

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Physical PropertiesMetricEnglishComments
Specific Gravity 1.22 g/cc1.22 g/ccASTM D792
Linear Mold Shrinkage, Flow 0.0080 cm/cm
@Thickness 2.54 mm
0.0080 in/in
@Thickness 0.100 in
ASTM D955
Linear Mold Shrinkage, Transverse 0.0080 cm/cm
@Thickness 2.54 mm
0.0080 in/in
@Thickness 0.100 in
ASTM D955
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 9595ASTM D2240
Hardness, Shore D 5050ASTM D2240
Tensile Strength at Break 46.2 MPa6700 psiASTM D412
Tensile Stress at Strain  11.7 MPa
@Strain 100 %
1700 psi
@Strain 100 %
ASTM D412
 31.7 MPa
@Strain 300 %
4600 psi
@Strain 300 %
ASTM D412
Elongation at Break 400 %400 %ASTM D412
Flexural Modulus  0.0360 GPa
@Temperature 70.0 °C
5.22 ksi
@Temperature 158 °F
ASTM D790
 0.0830 GPa
@Temperature 23.0 °C
12.0 ksi
@Temperature 73.4 °F
ASTM D790
Resilience 2525[%], Bayshore; ASTM D2632
Tear Strength 136 kN/m776 pliDie C; ASTM D624
Taber Abrasion, mg/1000 Cycles 70
@Load 1.00 kg
70
@Load 2.20 lb
[mg] Loss, H-18; ASTM D3489
Compression Set  15 %
@Temperature 23.0 °C,
Time 79200 sec
15 %
@Temperature 73.4 °F,
Time 22.0 hour
postcured; ASTM D395-B
 35 %
@Temperature 70.0 °C,
Time 79200 sec
35 %
@Temperature 158 °F,
Time 22.0 hour
postcured; ASTM D395-B
 
Thermal PropertiesMetricEnglishComments
Vicat Softening Point 115 °C239 °FRate A; ASTM D1525
Glass Transition Temp, Tg -20.0 °C-4.00 °F
 
Processing PropertiesMetricEnglishComments
Rear Barrel Temperature 180 - 200 °C356 - 392 °FExtrusion
 190 - 210 °C374 - 410 °FInjection
Middle Barrel Temperature 180 - 205 °C356 - 401 °FExtrusion
 190 - 215 °C374 - 419 °FInjection
Front Barrel Temperature 180 - 210 °C356 - 410 °FExtrusion
 200 - 220 °C392 - 428 °FInjection
Nozzle Temperature 205 - 225 °C401 - 437 °FInjection
Die Temperature 185 - 210 °C365 - 410 °FExtrusion
Melt Temperature 190 - 205 °C374 - 401 °FExtrusion
 205 - 215 °C401 - 419 °FInjection
Mold Temperature 15.0 - 40.0 °C59.0 - 104 °F
Injection Pressure 41.4 - 103 MPa6000 - 15000 psiInjection
Back Pressure <= 1.38 MPa<= 200 psiInjection
Cushion <= 0.317 cm<= 0.125 in
 
Compliance PropertiesMetricEnglishComments
FDA YesYes

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