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Rubber Compounds
Figure 1.3 Rubber Compound Specifications - To Be Regarded Only As A Guide

Commercial name

 

Perbunan

 

Neoprene

 

 

Hypalon

 

Natural rubber

Acrylonitrile butadiene rubber

Hydrogenated NBR

Chloroprene rubber

Acrylic rubber

Butyl rubber

Chloro-sulphonated polyethylene

 

Characterised by flexibility, strength and low temperature resistance as well as excellent physical properties. Ideal for bonded rubber/metal products. Not suitable for petrol, grease, oil and ozone.

Highly resistant to abrasion and tearing, particularly resistant to ageing. Particularly recommended for crude oil products, high temperatures, heating and lubricating oils, petrol and paraffin oil.

High resistance to heat, ozone and oil, good mechanical properties at high temperatures, excellent resistance to wear and tear.

All-purpose synthetic rubber, flame resistant, resistant to abrasion, very robust, good dielectric strength, particularly recommended for exposure to ozone and weathering.

Good resistance to high temperatures and mineral oils, high resistance to oxygen and ozone, unfavourable low temperature properties.

Very slightly permeable to air, steam and other gases, good resistance to heat, oxygen, ozone and many chemicals and solvents, good electrical properties (isolating), good resistance to abrasion and tear propagation.

Fast to light, colour -fast, flame-    resistant, good dielectric strength, particularly recommended for exposure to sunlight, ozone, weather and oxidising  chemicals. However, it has a very low tensile strength.

International
designation

NR

NBR

HNBR

CR

ACM

IIR

CSM

Hardness available

25 - 95 Shore A

25 - 95 Shore A

40 - 90 Shore A

30 - 90 Shore A

50 - 80 Shore A

40 - 85 Shore A

50 - 95 Shore A

Temperature resistance

-40°C to 80°C

-40°C to 140°C

-40°C to 175°C

-30°C to 120°C

-35°C to 175°C

-40°C to 130°C

-40°C to 120°C

Short-time peak temp

100°C

160°C

200°C

150°C

200°C

150°C

175°C

Tensile Strength (N/mm2)

25

25

30

25

16

17

18

Tensile elongation (%)

800

500

150 to 600

450

up to 350

400 to 800

300

Properties

 

 

 

 

 

 

 

Abrasion

good

very good

very good

good

moderate

good

moderate

Resistance to flex cracking

good

moderate

very good

very good

moderate

moderate

good

Elongation/Tensile strength

excellent

good

very good

good

good

good

good

Flexibility

excellent

good

good

good

low

slight

good

Notch strength / strength of structure

excellent

good

good

good

-

good

good

Resistance to light

bad

bad

good

very good

good

very good

excellent

Resistance to oxidising

moderate

moderate

good

good

very good

very good

excellent

Resistance to ozone

moderate

moderate

good

very good

very good

very good

excellent

Resistance to wear/tear

very good

very good

good

very good

good

good

good

Weathering effect

good

moderate

good

very good

very good

very good

excellent

Resistance to

 

 

 

 

 

 

 

Alkali

good

good

good

very good

not suitable

very good

very good

Petrol

not suitable

excellent

good

moderate

not suitable

not suitable

moderate

Benzole

not suitable

bad

moderate

not suitable

not suitable

not suitable

not suitable

Foodstuffs

suitable

suitable

not suitable

suitable

not suitable

suitable

suitable

Solvents, aliphatic

not suitable

very good

very good

moderate

bad

not suitable

moderate

Solvents, aromatic

not suitable

conditional

conditional

moderate

bad

not suitable

moderate

Solvents, halogen

not suitable

bad

conditional

bad

bad

not suitable

moderate

Oils and greases

not suitable

excellent

very good

good

very good

not suitable

good

Acids

conditional

conditional

conditional

good

not suitable

very good

very good

Water

good

good

very good

very good

good

good

good

It is not possible to undertake any warranty for the stated properties as practical use is subject to temperature, concentration etc...

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