TPU Covestro 487

TPU Covestro 487 is thermoplastic polyurethane elastomer with outstanding mechanical properties, good heat resistance, excellent oil‑resistance and hydrolysis‑resistance.

Main Applications

Automotive engineering components: seals, damping elements. Industrial applications: roller coating parts, seals, films. Machine parts: functional components for mechanical engineering & plant equipment.

Physical Properties

Property Category	Item	Test Condition	Test Standard	Typical Reference Data	Unit
Physical Properties	Density	—	ISO 1183	1.21	g/cm³
Mechanical Properties	Shore Hardness	—	ISO 868	86	Shore A
	Tensile strength at break	—	ISO 37	35	MPa
	Elongation at break	—	ISO 37	500	%
	100% Modulus	—	ISO 37	6	MPa
	300% Modulus	—	ISO 37	14	MPa
	Flexural Modulus	—	ISO 178	30	MPa
	Tear propagation strength	—	DIN 53515	70	kN/m
	Abrasion loss	—	ISO 4649	20	mm³
	Rebound resilience	—	ISO 4662	45	%
Compression Performance	Compression set	70h / 22℃	ISO 815	40	%
	Compression set	70h / 70℃	ISO 815	25	%

Processing Parameters

Process	Parameter	Unit	Reference Range	Remarks
Pre‑drying	Drying temperature	℃	80‑110	Circulating hot‑air drying recommended; TPU is moisture‑sensitive, drying is mandatory
	Drying time	h	≥3	Until moisture＜0.05%
	Material bed thickness	mm	≤30	Guarantee drying efficiency
Injection molding	Rear feed zone temp	℃	175‑195	Avoid long‑term melt residence under high temperature
	Middle compression zone temp	℃	180‑200
	Front metering zone temp	℃	185‑205
	Nozzle temperature	℃	Equal‑to‑slightly lower than front zone	Prevent drooling or cold‑plug blockage
	Melt temperature	℃	190‑210	Strictly prohibit＞240℃ to avoid degradation
	Mold temperature	℃	20‑40	Lower mold temp shortens cycle time & reduces sticking
	Injection pressure	bar	50‑100	Keep as low as possible while full filling
	Hold‑pressure	bar	30%‑60% of injection pressure	Excessive hold‑pressure & long hold‑time shall be avoided to reduce internal stress
	Screw speed	rpm	50‑100	High speed causes shear overheating
	Back pressure	bar	5‑15	Improve melt homogeneity; excessive back‑pressure generates extra heat

Note: All information above is for reference only!