Polyethyleneterephthalate

It is an unreinforced, semi-crystalline thermoplastic polyester.

Its main advantages are its great mechanical strength, excellent dimensional stability (better than POM), abrasion resistance and very good shear properties. It also has good electrical properties; it is physiologically acceptable and flame retardant. It has very low water absorption, which does not affect its mechanical and electrical properties. Its very low thermal expansion coefficient puts it among the leading thermoplastics. This material is easily glued and welded.

Material No.: 1301
Density ISO 1183: 1.40 g/cm³

Mechanical properties
Tensile strength at yield	ISO 527	80 MPa
Elongation	ISO 527	70 %
E-Modulus of tensile elasticity	ISO 527	2800 MPa
Brinell Hardness	ISO 2039-1	150 MPa
Brinell Hardness Number		H358/30
Shore (A/D) or Rockwell (R/L/M) Hardness	ISO 868, ISO 2039-2	D83

Electrical properties
Permittivity at 50 Hz	IEC 60250	3.4
Permittivity at 1 MHz	IEC 60250	3.2
Dielectric loss factor at 50 Hz	IEC 60250	20 E-4
Dielectric loss factor at 1 MHz	IEC 60250	210 1E-4
Dielectric strength	IEC 60243-1	60 kV/mm
Specific dielectric resistance	IEC 60093	2.10¹⁴ Ωm
Surface resistance	IEC 60093	6.10^E14 Ω
CTI Tracking resistance	IEC 60112	35

Thermal properties
Thermal conductivity	DIN 52 612	0.24 W/K.m
Coefficient of transverse expansion, linear	ISO 11359	70 10^-6/K
Melt or vitrification temperature	ISO 11357	255 °C
Heat distortion resistance A	ISO 75 HDT/A (1.8 MPa)	80 °C
Heat distortion resistance B	ISO 75 HDT/B (0.45 MPa)	115 °C
Max. short-term temperature		180 °C
Max. long-term temperature		100 °C
Min. operating temperature		-50 °C

Other properties
Water absorption under regular conditions	ISO 62	0.2 %
Water absorption in humidity	ISO 62	0.5 %
Burning behaviour according to UL 94	IEC 60695-11-10	HB

Special properties
Tensile creep modulus (0.5% 1000 hrs)	ISO 899-1	2000⁶⁾ MPa
Fatigue in flexure	ASTM D671	31 MPa
Izod notched impact strength at 23 °C	ISO 180/4A	20 J/m
Coefficient of slip creep compared to steel		0.34
Wear relative to the measured unit		10.8 (µm/km)/MPa
Specific heat capacity	IEC 1006	1.50 J/g K
LOI Acid index	ISO 4589	25 %
⁶⁾ Tensile creep modulus 1%/1000 hrs

Areas of use:

highly loaded slip elements and wheels
pump components
precision slip bearings and gears
skids
insulators in electrical engineering

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