TPEE DuPont 5556

TPEE DuPont 5556 is a well‑balanced thermoplastic polyester elastomer. Thanks to its balanced mechanical properties, good temperature resistance and chemical resistance, it is widely used in automotive, industrial‑component and other fields.

Main Applications

Automotive components (such as dust‑proof boots, pipelines), high‑low temperature resistant cable sheaths, hydraulic hoses, transmission belts, seals, etc.

Physical Properties

Property Category	Test Item	Test Standard	Data / Range	Unit
Physical Properties	Density / Specific Gravity	ASTM D‑792	1.20	g/cm³
	Melt Flow Rate (MFR)	ASTM D‑1238 (220°C/2.16kg)	7.5‑7.8	g/10min
	24‑h Water Absorption	ASTM D‑570	0.5	%
	Molding Shrinkage (Parallel / Transverse)	ISO 294‑4, 2577	1.4	%
	Shore D Hardness	ASTM D‑2240 / ISO 7619‑1	55	—
Mechanical Properties	Tensile Strength at Break	ASTM D‑638 / ISO 527‑2	40	MPa
	Elongation at Break	ASTM D‑638 / ISO 527‑2	500‑600	%
	Flexural Modulus (23°C)	ASTM D‑790	207	MPa
	Tear Strength	ASTM D‑1004 / ISO 34‑1	134‑158	kN/m
	Taber Abrasion (CS‑17 wheel)	ASTM D‑1044	6‑120	mg/1000 rev or mm³
	Izod Impact Strength (23°C)	ASTM D‑256	No break	—
	Flex‑cut‑growth Resistance	ASTM D‑1052	＞5 × 10⁵	cycles
Thermal Properties	Melting Point	ASTM D‑3418	203	°C
	Vicat Softening Point	ASTM D‑1525	180	°C
	HDT @0.45 MPa	ASTM D‑648	90	°C
	HDT @1.8 MPa	ASTM D‑648	49	°C

Processing Technology

Process Parameter	Test Item	Data / Range	Unit	Remarks
Pre‑drying	Temperature	80‑120	°C	Critical, keep moisture content ≤0.1%
	Time	4‑8	h
Injection Molding	Barrel Temperature	180‑230	°C	General processing range for TPEE
	Mold Temperature	20‑60	°C
	Injection Pressure	80‑120	MPa
	Screw Speed	Medium	—	Avoid excessive shear
Extrusion	Processing Temperature	180‑230	°C	General processing range for TPEE
	Screw L/D Ratio	≥24:1	—
	Screw Compression Ratio	(2.5‑4):1	—

Note: All information above is for reference only!