Olefinic Based Thermoplastic Elastomer - Ol TPE 85A

May 11 2001

Topics Covered

Introduction
Polymer Type
Advantages
Disadvantages
Typical Properties
Applications

Introduction

Thermoplastic elastomers (TPE) contain materials which display both elastomeric and thermoplastic properties. Generally, elastomers are thermosets and so TPEs are much more desirable, as thermoplastics are easier to manufacture, for example by injection moulding. It is a particular type of crosslinking bonding which separates thermoset elastomers and thermoplastic polymers. An olefinic-based thermoplastic elastomer is a TPE which contains at least one olefin (unsaturated carbon-carbon double bond, sometimes referred to as an alkene).

Polymer Type

Thermoplastic

Advantages

When compared to Ol TPE 65A, Ol TPE 85A has a number of advantages:

Better tensile strength
Better flexural modulus

Disadvantages

Compared to Ol TPE 65A it has:

Lower elongation at break

Typical Properties

Property	Value
Density (g/cm³)	0.84
Surface Hardness	SA85
Tensile Strength (MPa)	9
Flexural Modulus (GPa)	0.03
Notched Izod (kJ/m)	1.06+
Linear Expansion (/°C x 10^-5)	15
Elongation at Break (%)	700
Strain at Yield (%)	N/Y
Max. Operating Temp. (°C)	85
Water Absorption (%)	0.01
Oxygen Index (%)	19
Flammability UL94	HB
Volume Resistivity (log ohm.cm)	16
Dielectric Strength (MV/m)	24
Dissipation Factor 1kHz	0.0008
Dielectric Constant 1kHz	2.2
HDT @ 0.45 MPa (°C)	20-
HDT @ 1.80 MPa (°C)	20-
Material. Drying hrs @ (°C)	NI
Melting Temp. Range (°C)	200 - 240
Mould Shrinkage (%)	1.5
Mould Temp. Range (°C)	40 - 60