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

 

Applications

  • Insulation cable

  • Car bumpers, radiator grills, body panels, mud flaps, wheel arch protectors 

  • Impact modifier for polypropylene.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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