Material Properties of Elastomeres (rubber)

Material properties of
Elastomeres (rubber)

International symbol NBR CR FPM TPE PUR

Brand name (e.g.) Perbunan ® Neoprene ® Viton SANTOPRENE® Bayflex®

Chemical name

Acrylonitrile-
butadiene
rubber Chloroprene rubber
Fluorine rubber

Thermoplastic rubber
Polyurethane

Hardness [Shore A] 25 to 95 30 to 90 65 to 90 55 to 87 65 to 90

Temperature
resistance

short-term � 40 to +150 °C � 30 to +150 °C � 30 to +280 °C � 40 to +150 °C � 40 to +130 °C

long-term � 30 to +120 °C � 20 to +120 °C � 20 to +230 °C � 30 to +125 °C � 25 to +100 °C

Tensile strength
(N/mm�( 25
25'
20
8,5
20

Wear / Abrasion
resistance
good
good
good
good
excellent

Resistance to:

Oil, grease outstanding good good good very good

Solvents good in part good in part very good outstanding satisfactory

Acids restricted good very good outstanding not suitable

Caustic solutions good very good very good outstanding not suitable

Fuels good slight outstanding good good

General

NBR is
a synthetic special rubber for rubber parts with high
requirements for resistance to swelling when in contact with oils and fuels.

Standard
material for
O-rings.

CR is
one of the most frequently used synthetic
rubbers with a wide range of applications for parts which require
exceptional resistance to ageing, atmospheric and environmental influences.

FPM is
unmatched for applications with contact to fuels, oils, solvents, as well as many acids and caustic solutions;
resistant to atmospheric and
environmental influences.

Due to its high price its use is restricted to high quality rubber parts which are exposed to extremely heavy wear.

SANTOPRENE is
a thermoplastic rubber, the
performance characteristics of which are
comparable to those of many customary
vulcanised
special rubbers.

SANTOPRENE is a mult-purpose material with outstanding
dynamic fatigue life and excellent resistance to ozone and
atmospheric
influences (environmental influences).
PUR is known for exception-
ally good mechanical characteristics with very good resistance to atmospheric and environ-
mental
influences.

In addition, the extreme
resistance to tearing and to wear, should also be
mentioned.

The characteristics described should be treated as guidelines only. No guarantee is made. The exact conditions of use have to be taken into account individually.

International symbol	NBR	CR	FPM	TPE	PUR

Brand name (e.g.)	Perbunan ®	Neoprene ®	Viton	SANTOPRENE®	Bayflex®

Chemical name	Acrylonitrile- butadiene rubber	Chloroprene rubber	Fluorine rubber	Thermoplastic rubber	Polyurethane

Hardness [Shore A]	25 to 95	30 to 90	65 to 90	55 to 87	65 to 90

Temperature resistance
short-term	� 40 to +150 °C	� 30 to +150 °C	� 30 to +280 °C	� 40 to +150 °C	� 40 to +130 °C

long-term	� 30 to +120 °C	� 20 to +120 °C	� 20 to +230 °C	� 30 to +125 °C	� 25 to +100 °C

Tensile strength (N/mm�(	25	25'	20	8,5	20

Wear / Abrasion resistance	good	good	good	good	excellent

Resistance to:
Oil, grease	outstanding	good	good	good	very good

Solvents	good in part	good in part	very good	outstanding	satisfactory

Acids	restricted	good	very good	outstanding	not suitable

Caustic solutions	good	very good	very good	outstanding	not suitable

Fuels	good	slight	outstanding	good	good

General	NBR is a synthetic special rubber for rubber parts with high requirements for resistance to swelling when in contact with oils and fuels. Standard material for O-rings.	CR is one of the most frequently used synthetic rubbers with a wide range of applications for parts which require exceptional resistance to ageing, atmospheric and environmental influences.	FPM is unmatched for applications with contact to fuels, oils, solvents, as well as many acids and caustic solutions; resistant to atmospheric and environmental influences. Due to its high price its use is restricted to high quality rubber parts which are exposed to extremely heavy wear.	SANTOPRENE is a thermoplastic rubber, the performance characteristics of which are comparable to those of many customary vulcanised special rubbers. SANTOPRENE is a mult-purpose material with outstanding dynamic fatigue life and excellent resistance to ozone and atmospheric influences (environmental influences).	PUR is known for exception- ally good mechanical characteristics with very good resistance to atmospheric and environ- mental influences. In addition, the extreme resistance to tearing and to wear, should also be mentioned.