Covestro Texin® 270 Thermoplastic Polyurethanes (TPU)

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Covestro Texin® 270 Thermoplastic Polyurethanes (TPU)
Categories:	Polymer; Thermoplastic; Polyurethane, TP
Material Notes:	Texin 270 resin is an aromatic polyester-based thermoplastic polyurethane with a Shore hardness of approximately 70D. It can be processed by injection molding; extrusion processes are not recommended. Properties / Applications: Texin 270 resin exhibits excellent fuel and oil resistance. It also provides high stiffness, tensile and tear properties. Texin 270 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 caster wheels, gears, sprockets, and sporting equipment. Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.24 g/cc	1.24 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	70	70	ASTM D2240
Tensile Strength at Break	56.6 MPa	8210 psi	ASTM D412
Tensile Stress at Strain	28.3 MPa @Strain 50 %	4100 psi @Strain 50 %	ASTM D412
	29.0 MPa @Strain 100 %	4210 psi @Strain 100 %	ASTM D412
	42.8 MPa @Strain 300 %	6210 psi @Strain 300 %	ASTM D412
Elongation at Break	400 %	400 %	ASTM D412
Elongation at Yield	1.132 %	1.132 %
	1.132 %	1.132 %
	1.698 %	1.698 %
	2.264 %	2.264 %
	2.83 %	2.83 %
	3.458 %	3.458 %
	3.962 %	3.962 %
	4.528 %	4.528 %
	4.528 %	4.528 %
	5.094 %	5.094 %
	5.094 %	5.094 %
	5.66 %	5.66 %
	5.66 %	5.66 %
	9.622 %	9.622 %
	11.32 %	11.32 %
	11.32 %	11.32 %
	11.886 %	11.886 %
	16.414 %	16.414 %
	18.112 %	18.112 %
Flexural Modulus	0.103 GPa @Temperature 70.0 °C	14.9 ksi @Temperature 158 °F	ASTM D790
	0.724 GPa @Temperature 23.0 °C	105 ksi @Temperature 73.4 °F	ASTM D790
	2.91 GPa @Temperature -30.0 °C	422 ksi @Temperature -22.0 °F	ASTM D790
Compressive Strength	3.80 MPa	551 psi	2% Deflection; ASTM D 575
	13.1 MPa	1900 psi	5% Deflection; ASTM D 575
	21.7 MPa	3150 psi	10% Deflection; ASTM D 575
	25.9 MPa	3760 psi	15% Deflection; ASTM D 575
	29.3 MPa	4250 psi	20% Deflection; ASTM D 575
	33.8 MPa	4900 psi	25% Deflection; ASTM D 575
	65.8 MPa	9540 psi	50% Deflection; ASTM D 575
Resilience	55	55	[%], Bayshore; ASTM D2632
Tear Strength	228 kN/m	1300 pli	Die C; ASTM D624
Taber Abrasion, mg/1000 Cycles	90 @Load 1.00 kg	90 @Load 2.20 lb	[mg] Loss, H-18; ASTM D3489
Compression Set	30 % @Temperature 23.0 °C, Time 79200 sec	30 % @Temperature 73.4 °F, Time 22.0 hour	postcured; ASTM D395-B
	45 % @Temperature 70.0 °C, Time 79200 sec	45 % @Temperature 158 °F, Time 22.0 hour	postcured; ASTM D395-B
	50 % @Temperature 23.0 °C, Time 79200 sec	50 % @Temperature 73.4 °F, Time 22.0 hour	as molded; ASTM D395-B
	85 % @Temperature 70.0 °C, Time 79200 sec	85 % @Temperature 158 °F, Time 22.0 hour	as molded; ASTM D395-B

Thermal Properties	Metric	English	Comments
CTE, linear	99.0 µm/m-°C	55.0 µin/in-°F	ASTM D696
Deflection Temperature at 0.46 MPa (66 psi)	46.0 °C	115 °F	ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	38.0 °C	100 °F	ASTM D648
Vicat Softening Point	158 °C	316 °F	Rate A; ASTM D1525
Brittleness Temperature	>= -55.6 °C	>= -68.0 °F	ASTM D746
Glass Transition Temp, Tg	0.000 °C	32.0 °F

Processing Properties	Metric	English	Comments
Rear Barrel Temperature	210 - 235 °C	410 - 455 °F
Middle Barrel Temperature	210 - 240 °C	410 - 464 °F
Front Barrel Temperature	215 - 240 °C	419 - 464 °F
Nozzle Temperature	215 - 240 °C	419 - 464 °F
Melt Temperature	220 - 240 °C	428 - 464 °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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PCOVEST0978 / 202761

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