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Rulon Bearings

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Covestro Texin® 255 Thermoplastic Polyurethanes (TPU)
Categories: Polymer; Thermoplastic; Polyurethane, TP
Material Notes: Texin 255 resin is a polyester-based thermoplastic polyurethane with a Shore hardness of approximately 55D. It can be processed by injection molding; extrusion processes are not recommended.

Properties / Applications: Texin 255 natural color resin complies with FDA food-contact regulations 21 CFR 177.1680 (Polyurethane Resins) and 177.2600 (Rubber Articles Intended for Repeated Use), for use in articles that contact food except articles used for packing or holding food during cooking, subject to the limitations of these and any other applicable regulations. Texin 255 resin offers excellent fuel and oil resistance, as well as outstanding abrasion resistance, impact strength, toughness, and flexibility. Typical applications include toplifts, seals, gaskets, sleeves, casters, and gears.

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.21 g/ccASTM D792
Linear Mold Shrinkage, Flow 0.0080 cm/cm
@Thickness 2.54 mm		ASTM D955
Linear Mold Shrinkage, Transverse 0.0080 cm/cm
@Thickness 2.54 mm		ASTM D955
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 55ASTM D2240
Tensile Strength at Break 63.4 MPaASTM D412
Tensile Stress at Strain 12.4 MPa
@Strain 50 %		ASTM D412
 15.9 MPa
@Strain 100 %		ASTM D412
 32.4 MPa
@Strain 300 %		ASTM D412
Elongation at Break 500 %ASTM D412
Flexural Modulus 51.7 MPa
@Temperature 70.0 °C		ASTM D790
 68.9 MPa
@Temperature 23.0 °C		ASTM D790
 1207 MPa
@Temperature -30.0 °C		ASTM D790
Compressive Strength 1.00 MPa2% Deflection; ASTM D 575
 3.90 MPa5% Deflection; ASTM D 575
 7.40 MPa10% Deflection; ASTM D 575
 10.1 MPa15% Deflection; ASTM D 575
 12.7 MPa20% Deflection; ASTM D 575
 15.5 MPa25% Deflection; ASTM D 575
 40.6 MPa50% Deflection; ASTM D 575
Resilience 40[%], Bayshore; ASTM D2632
Shear Strength 5.585 ksiASTM D732
Dart Drop, Total Energy 36.9 ft-lb
@Thickness 2.54 mm,
Temperature -30.0 °C		5 ph, 3-in clamp; ASTM D3763
 42.6 ft-lb
@Thickness 2.54 mm,
Temperature 23.0 °C		5 ph, 3-in clamp; ASTM D3763
Tear Strength 157.6 kN/mDie C; ASTM D624
Taber Abrasion, mg/1000 Cycles 50
@Load 1.00 kg		[mg] Loss, H-18; ASTM D3489
Compression Set 15 %
@Temperature 23.0 °C,
Time 79200 sec		postcured; ASTM D395-B
 20 %
@Temperature 23.0 °C,
Time 79200 sec		as molded; ASTM D395-B
 35 %
@Temperature 70.0 °C,
Time 79200 sec		postcured; ASTM D395-B
 50 %
@Temperature 100 °C,
Time 79200 sec		postcured; ASTM D395-B
 65 %
@Temperature 70.0 °C,
Time 79200 sec		as molded; ASTM D395-B
 75 %
@Temperature 100 °C,
Time 79200 sec		as molded; ASTM D395-B
 
Thermal PropertiesOriginal ValueComments
CTE, linear 73.0 µin/in-°FASTM D696
Deflection Temperature at 0.46 MPa (66 psi) 59.0 °CASTM D648
Vicat Softening Point 138 °CRate A; ASTM D1525
Brittleness Temperature >= -68.0 °FASTM D746
Glass Transition Temp, Tg -26.0 °C
Flammability, UL94 HB
@Thickness 1.50 mm
 
Processing PropertiesOriginal ValueComments
Rear Barrel Temperature 193 - 210 °C
Middle Barrel Temperature 193 - 216 °C
Front Barrel Temperature 199 - 221 °C
Nozzle Temperature 204 - 227 °C
Melt Temperature 210 °C
Mold Temperature 15.0 - 40.0 °C
Injection Pressure 6000 - 15000 psi
 
Compliance PropertiesOriginal ValueComments
FDA Yes

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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