Covestro Texin® 245 Thermoplastic Polyurethanes (TPU)

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Covestro Texin® 245 Thermoplastic Polyurethanes (TPU)
Categories:	Polymer; Thermoplastic; Polyurethane, TP
Material Notes:	Texin 245 resin is an aromatic polyester-based thermoplastic polyurethane with a Shore hardness of approximately 43D. It can be processed by injection molding; extrusion processes are not recommended. Properties / Applications: Texin 245 resin is characterized by excellent low-temperature properties and excellent fuel and oil resistance. It also offers outstanding abrasion resistance, impact strength, toughness, and flexibility. Texin 245 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. Typical applications include casters, couplings, sleeves and gears. Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.21 g/cc	1.21 g/cc	ASTM 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 Properties	Metric	English	Comments
Hardness, Shore D	43	43	ASTM D2240
Tensile Strength at Break	54.5 MPa	7900 psi	ASTM D412
Tensile Stress at Strain	7.60 MPa @Strain 50 %	1100 psi @Strain 50 %	ASTM D412
	9.00 MPa @Strain 100 %	1310 psi @Strain 100 %	ASTM D412
	20.7 MPa @Strain 300 %	3000 psi @Strain 300 %	ASTM D412
Elongation at Break	500 %	500 %	ASTM D412
Flexural Modulus	0.0517 GPa @Temperature 70.0 °C	7.50 ksi @Temperature 158 °F	ASTM D790
	0.0689 GPa @Temperature 23.0 °C	9.99 ksi @Temperature 73.4 °F	ASTM D790
Compressive Strength	0.700 MPa	102 psi	2% Deflection; ASTM D 575
	2.10 MPa	305 psi	5% Deflection; ASTM D 575
	3.90 MPa	566 psi	10% Deflection; ASTM D 575
	5.50 MPa	798 psi	15% Deflection; ASTM D 575
	6.90 MPa	1000 psi	20% Deflection; ASTM D 575
	9.00 MPa	1310 psi	25% Deflection; ASTM D 575
	23.0 MPa	3340 psi	50% Deflection; ASTM D 575
Resilience	45	45	[%], Bayshore; ASTM D2632
Izod Impact, Notched	1.76 J/cm @Thickness -762 mm	3.30 ft-lb/in @Thickness -30.0 in	ASTM D256
	NB @Thickness 584 mm	NB @Thickness 23.0 in	ASTM D256
Tear Strength	122.6 kN/m	699.6 pli	Die 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	18 % @Temperature 23.0 °C, Time 79200 sec	18 % @Temperature 73.4 °F, Time 22.0 hour	postcured; ASTM D395-B
	18 % @Temperature 23.0 °C, Time 79200 sec	18 % @Temperature 73.4 °F, Time 22.0 hour	as molded; ASTM D395-B
	35 % @Temperature 100 °C, Time 79200 sec	35 % @Temperature 212 °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
	43 % @Temperature 70.0 °C, Time 79200 sec	43 % @Temperature 158 °F, Time 22.0 hour	as molded; ASTM D395-B
	60 % @Temperature 100 °C, Time 79200 sec	60 % @Temperature 212 °F, Time 22.0 hour	as molded; ASTM D395-B

Thermal Properties	Metric	English	Comments
Vicat Softening Point	148 °C	298 °F	Rate A; ASTM D1525
Brittleness Temperature	>= -67.8 °C	>= -90.0 °F	ASTM D746
Glass Transition Temp, Tg	-46.0 °C	-50.8 °F
UL RTI, Electrical	50.0 °C @Thickness 1.50 mm	122 °F @Thickness 0.0591 in	UL 746B
UL RTI, Mechanical with Impact	50.0 °C @Thickness 1.50 mm	122 °F @Thickness 0.0591 in	UL 746B
UL RTI, Mechanical without Impact	50.0 °C @Thickness 1.50 mm	122 °F @Thickness 0.0591 in	UL 746B
Flammability, UL94	HB @Thickness 1.50 mm	HB @Thickness 0.0591 in

Processing Properties	Metric	English	Comments
Rear Barrel Temperature	193 - 204 °C	379 - 399 °F
Middle Barrel Temperature	193 - 204 °C	379 - 399 °F
Front Barrel Temperature	199 - 210 °C	390 - 410 °F
Nozzle Temperature	204 - 210 °C	399 - 410 °F
Melt Temperature	204 - 216 °C	399 - 421 °F
Mold Temperature	15.0 - 40.0 °C	59.0 - 104 °F
Injection Pressure	41.4 - 103 MPa	6000 - 15000 psi
Back Pressure	<= 1.38 MPa	<= 200 psi
Cushion	<= 0.317 cm	<= 0.125 in

Compliance Properties	Metric	English	Comments
FDA	Yes	Yes

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PCOVEST0974 / 202757

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