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StoffBestellvorschrift; Weichgummi und Schaumstoff;
BoschBezeichnung
In case of doubt apply the German version of this BoschNorm.
1 ScopeThis norm defines the Bosch designations, characteristics
and requirements for soft rubber and cellular mate-rial.
2 Structure of the Bosch designation for soft rubber
special requirement, see 2.5
media, see 2.4
color, see 2.6
resistance to cool, see 2.2
resistance to heat, see 2.2
ShoreAhardness
rubber base, see 2.1
compreesion sett, see 2.3
Counting point
GW . . . . . . . . . . . .
If all elements of the Bosch designation are not needed for the
description, the unnecessary elements can be
omitted.
2.1 Rubber base
10 ACM
11 AEM
12 EPDM
13 FKM (FPM)
20 ECO
30 CR
31 CRIIRNR
32 HNBR
33 IIR
34 NBR
35 NBR/CR
36 NBR/SBR
37 NR
38 PNR
39 SBR
40 CR/NR
41 NR/SBR
50 FVMQ
51 VMQ
52 VMQ (LSR)
60 AU (PUR)
80 optional
90 Cellular material(Section 3)
Continued on page 2 to 3
Technical responsibility: FV/PLK3
N28
GW
4 497 020 762
Material order specification
Soft rubber and cellular material
Bosch designation
April 2001
PropertyofRobertBoschGmbH
Eigentum
derRobertBoschGmbH
FV/PLS Su
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Page 2 N28 GW April 2001
Property of Robert Bosch GmbH FV/PLS
2.2 Characteristics for resistance to heat and cold
Heat Temperature characteristic Cold
to 69 C 0 to 5 C
70 C to 84 C 1 to 10 C
85 C to 99 C 2 to 15 C
100 C to 124 C 3 to 20 C
125 C to 149 C 4 to 25 C
150 C to 174 C 5 to 30 C
175 C to 199 C 6 to 35 C
200 C to 224 C 7 to 40 C
225 C to 249 8 to 45 C
from 250 C 9 under 45 C
2.3 Characteristics for compression set
1. See point temperature characteristic for heat, 2.2
2. See point characteristic, the following table
0 no requirement 5 31 to 35 %
1 to 15 % 6 36 to 40 %
2 16 to 20 % 7 41 to 50 %
3 21 to 25 % 8 over 51 %
4 26 to 30 % 9 DVR and DSR (compressive stress relaxation)
2.4 Characteristics for media
0 no requirement
1 fuels (methanolfree), solvents
2 methanolcontaining fuels,
3 mineral oils, mineral oil products
4 brake fluid
5water and antifreezes
Water/white spleits, isopropyl alcohol/water,
6 1 and 3
7 3 and 5
8 1 and 3 and 5
9 other ones
2.5 Characteristics for special requirements
0 no requirement
1 environment / climate; ozone, light resistance
2 contact stain, permeability, copper contamination, free
sulphur
3 tribological performance
4 electrical requirements
5 rebound resilience, tearing resistance
6 food, plastics, drinking water (KTW), taste
7 special requirements for parts8 multiple combinations
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N28 GW Page 3April 2001
Property of Robert Bosch GmbHFV/PLS
2.6 Mark of colors
0 optional 3 yellow 6 gray
1 black 4 red 7 blue
2 white 5 green 8 brown
3 Structure of the Bosch designation for cellular material
special requirements, see 2.5
media, see 2.4
color, see 2.6
resistance to cool, see 2.2resistance to heat, see 2.2
density, see 3.2
water absorption, see 3.4
Counting point
GW90 . . . . . . . . . .
Cellularmaterial
cellular material base, see 3.1
pore formation, see 3.3
If all elements of the Bosch designation are not needed for the
description, the unnecessary elements can beomitted.
3.1 Cellular material base
0 optional
1 Elastomer
2 Thermoplastic Elastomer
3 Thermoplastics
4 Thermosetting plastics
3.2 Density
0 optional
1 up to 19 kg/m3
2 20 to 49 kg/m3
3 50 to 99 kg/m3
4 100 to 199 kg/m3
5 200 to 499 kg/m3
6 over 500 kg/m3
3.3 Pore formation
0 optional
1 closedcell2 ?offenzellig
3.4 Water absorption
Parts by volume
0 optional
1 1 to 4 %
2 5 to 9 %
3 10 to 19 %
4 over 20 %
