VW50123_EN_2000-10-01
Vertragspartner erhalten die Norm nur über die zust?ndige Beschaffungsabteilung.
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Parties to a contract can only obtain this standard via the responsible procurement department.
VOLKSWAGEN AG
F o r m F E 41 - 10.99
T h e E n g l i s h t r a n s l a t i o n i s b e l i e v e d t o b e a c c u r a t e . I n c a s e
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VW 501 23: 2000-10
These elastomers are multi-phase materials that contain hard and soft segments as blocks in the main chain or hard segments grafted as side chains on flexible base chains. The soft segments form the movable areas necessary for the rubber elasticity. The cross-linked areas of these mate-rials are relatively easy to split by means of heat and thus limit the characteristic rubber elastic ap-plication at higher temperatures. The thermoreversible cross-linkage of the TPE allows for thermo-plastic-like processing.
Classes
2.2 Type
2.2.1 Types with Low Hardness
(hardness range ≤ 65 Shore A and hardness range > 65 Shore A)
2.2.1.1 Thermoplastic Polyurethanes (TPE-U)
E.g.:>PUR<
2.2.1.2 Thermoplastic EPDM/PP Elastomer (TPE-O/V)
E.g.:>EPDM+PP<
2.2.1.3 Thermoplastic PS/PE/PB Elastomer (TPE-S)
E.g.:>PS/PE/PB<
2.2.2 Types with High Hardness (hardness range 40 to 50 Shore D)
2.2.2.1 Thermoplastic Copolyetherester Elastomer (TPE-E)
E.g.:>TEEE<
2.2.2.2 Thermoplastic Polyether Block Amide Elastomer (TPE-A)
E.g.:>PEBA<
3 Designation
Example of designation for a lightfast Santoprene ?, dyed black, with a 60 Shore A preferred hardness and a density of 1.04 g/cm3.
EPDM/PP, VW 501 23 – 60 Shore A, black, 1.04 g/cm3, lightfast
4 Requirements
4.1 Basic
Specifications
Approval of first supply and changes per VW 011 55.
Avoidance of hazardous substances acc. to VW 911 01
Testing of TPE qualities is preferably conducted on components and sections of components; in exceptional cases, test panels can be used.
Samples shall be delivered in principle with the manufacturer’s quality designation.
The quantity of parts needed for laboratory tests shall be confirmed with the responsible material laboratory.
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VW 501 23: 2000-10
4.1.1 Testing for Plate Material
During the manufacture of plate material, anisotropic effects (= orientation of macro molecules during manufacturing) can be expected (at the injection points) as a result of the plastic injection process. This leads to differences in the mechanical characteristic values for strength and elonga-tion depending on the direction of the orientations. This must be taken into consideration during the examinations.
To do this, corresponding specimens shall be taken from the plate material and torn lengthwise and crosswise. Generally, the specimens taken crosswise to the direction of orientation of the macro molecules exhibit lower strength and elongation values.
The specimens to be used for laboratory testing according to this standard shall be taken cross-wise to the orientation of the macro molecules.
4.2 Validity of Requirements
The specified numerical values apply to each individual measurement.
For parts whose qualities are not classified in this standard, special technical supply specifications or entries in the drawings shall be created.
Condition
As-Received
in
4.3 Color
Acc. to drawing
4.4 Appearance
No visible flaws, inclusions, etc.
4.5 Material
Identification
4.5.1 IR, Py-GC-MS Coupling
Py-GC-MS acc. to PV 3935
4.5.2 Thermogravimetry
According to section 5.1
Volatile, polymer and nonvolatile portions shall be specified.
4.5.3 DSC
According to section 5.2
The following shall be specified: Enthalpy of fusion, melt range, beginning of melt applies as Tm (!), not the maximum peak, curves for 1st heating, 1st crystallization, 2nd heating and 2nd crystallization.
4.5.4 Dimensional Stability under Heat acc. to EN ISO 306, Method B
only is required in the drawing, acc. to released sample.
4.5.5 Density according to VDA 675 106
Specification according to the drawing
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4.6 Hardness
A
4.6.1 Shore
Hardness range ≤ 65 Shore A and hardness range > 65 Shore A for TPE which are subjected pri-marily to daytime light and weather factors (e.g., TPE-O/V such as Santoprene ?, Sarlink ?, Thermolast K ?).
4.6.2 Shore
D
Hardness range 40 to 50 Shore D for TPE, which can also come into contact with operating fluids, such as oils, greases, fuels, crankcase gasses (resistance to a limited extent) (e.g., TPE-E such as Hytrel ?, Arnitel ?).
4.7 Low-Temperature Elasticity after 22 h/ -40° C
4.7.1 General
Free of cracks, fractures when bent manually.
4.7.2 Freeze Temperature T G
According to drawing.
4.8 Ozone Resistance acc to VW 2.8.1, Mounted Similar to Installed Condition
free of cracks
4.9 Burning Behavior acc. to TL 1010
According to drawing.
4.10 Lightfastness according to VW 2.8.1
No changes as compared to as-received condition, e.g., discoloration, embrittlement, decomposi-tion, cracks. Only required if “lightfastness” is additionally specified in the drawing.
4.11 Elasticity Limit (critical elongation)
acc. to released sample
4.12 Emission Behavior acc. to VW 501 80
According to drawing.
4.13 Other Mechanical Properties of TPE in the Hardness Range Shore A
See Table 1 (deviating limit values can be specified in justified cases).
4.14 Other Mechanical Properties of TPE in the Hardness Range Shore D
See Table 2 (deviating limit values can be specified in justified cases).
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Table 1: Hardness range shore A
No.Property Unit Requirement
Preferred hard-ness ≤ 65Preferred hard-ness > 65
1Hardness
acc. to VDA 675 202
1.1As-Received Condition
(Preferred hardness)
Shore A60 + 575 + 5
1.2Change as Compared to As-
Received Condition
1.2.1After Heat Aging acc. to
section 5.3
Shore A0 to +3
1.2.2After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing Shore A only when required in the drawing.
Limit values shall be specified.
2Weight Change
2.1After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing only when required in the drawing. Limit values shall be specified
3Tensile Strength
acc. to VDA 675 205
3.1As-Received Condition N/mm2> 6> 12 3.2After Heat Aging acc. to
section 5.3
N/mm2> 6> 12
3.3After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing N/mm2only when required in the drawing.
Limit values shall be specified
4Elongation at Tear
acc. to VDA 675 205
4.1As-Received Condition%> 250 4.2After Heat Aging acc. to
section 5.3
%> 250
4.3After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing %only when required in the drawing.
Limit values shall be specified
5Tear Propagation Resistance
acc. to VDA 675 211
5.1As-Received Condition N/mm> 8 6Permanent Deformation acc.
to VDA 675 218
%according to the drawing
7Rebound Resilience acc.
to VDA 675 219%only when required in the drawing.
Limit values shall be specified
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Table 2: Hardness range shore D
No.Property Unit Requirement
1Hardness
acc. to VDA 675 202
1.1As-Received Condition
Shore D55 ± 3
(preferred hardness)
1.2Change as Compared to As-
Received Condition
Shore D0 to +3
1.2.1After Heat Aging acc. to
section 5.3
1.2.2After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing
1.2.2.1Engine Oil acc. to TL 521 85Shore D± 5
1.2.2.2Transmission Oil acc. to TL 726Shore D± 5
1.2.2.3Grease acc. to TL 735/TL 745Shore D± 5
1.2.2.4Gasoline FAM2
Shore D0 to -15
acc. to VW 2.8.1
1.2.2.5Diesel Fuel acc. to TL 788Shore D0 to -15
1.2.2.6Vegetable Oil Methyl Ester
Shore D0 to -15
acc. to DIN V 51606
Shore D according to the drawing 1.2.2.7Brake Fluid acc. to TL 766
and section 5.4.5
1.2.2.8Coolant acc. to TL 774Shore D according to the drawing 1.2.2.9Medium according to the Drawing Shore D according to the drawing 2Weight Change After Aging in Op-
erating Fluids, acc. to section 5.4,
Medium acc. to Drawing
2.1Engine Oil acc. to TL 521 85%± 5
2.2Transmission Oil acc. to TL 726%± 5
2.3Grease acc. to TL 735/TL 745%± 5
%0 to +30
2.4Gasoline FAM2
acc. to VW 2.8.1
2.5Diesel Fuel acc. to TL 788%0 to +15
%0 to +15
2.6Vegetable Oil Methyl Ester
acc. to DIN V 51606
2.7Brake Fluid acc. to TL 766
%±5
and section 5.4.5
2.8Coolant acc. to TL 774%± 5
2.9Medium according to the Drawing%± 5
3Tensile Strength
acc. to VDA 675 205
3.1As-Received Condition N/mm2> 30
N/mm2> 30
3.2After Heat Aging acc. to
section 5.3
3.3After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing
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No.Property Unit Requirement
3.3.1Engine Oil acc. to TL 521 85N/mm2> 25
3.3.2Transmission Oil acc. to TL 726N/mm2> 25
3.3.3Grease acc. to TL 735/TL 745N/mm2> 25
3.3.4Gasoline FAM2
acc. to VW 2.8.1
N/mm2> 20
3.3.5Diesel Fuel acc. to TL 788N/mm2> 25
3.3.6Vegetable Oil Methyl Ester
acc. to DIN V 51606
N/mm2> 25
3.3.7Brake Fluid acc. to TL 766
and section 5.4.5
N/mm2> 25
3.3.8Coolant acc. to TL 774N/mm2> 25
3.3.9Medium according to the Drawing N/mm2> 25
4Elongation at Tear
acc. to VDA 675 205
4.1As-Received Condition%> 450
4.2After Heat Aging acc. to
section 5.3
%> 450
4.3After Aging in Operating Fluids,
acc. to section 5.4,
Medium acc. to Drawing
4.3.1Engine Oil acc. to TL 521 85%> 450
4.3.2Transmission Oil acc. to TL 726%> 450
4.3.3Grease acc. to TL 735/TL 745%> 450
4.3.4Gasoline FAM2
acc. to VW 2.8.1
%> 300
4.3.5Diesel Fuel acc. to TL 788%> 300
4.3.6Vegetable Oil Methyl Ester
acc. to DIN V 51606
%> 300
4.3.7Brake Fluid acc. to TL 766
and section 5.4.5
%> 450
4.3.8Coolant acc. to TL 774%> 450
4.3.9Medium according to the Drawing%> 450
5Tear Propagation Resistance
acc. to VDA 675 211
As-Received Condition
N/mm> 40
6Impact Strength, Notched
acc. to EN ISO 179
at 23° C kJ/m2acc. to sample; only if required in the drawing
7Behavior as Compared to Crank-case Gasses acc. to PV 3936acc. to drawing; only if required in the drawing
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5 Notes on Testing
5.1 Testing Parameters for Thermogravimetry
The test equipment can be, for example, the DSC7 from Perkin Elmer.
A finished part section weighing approx. 10 mg, which has been ground up with a suitable tool into broken sections having an edge length of ≤ 1 mm, is used as the specimen.
The specimen is heated under nitrogen from 50 to 700° C at 20° C/min and then cooled at 20° C/min to 400° C under nitrogen. Subsequently, the nitrogen atmosphere is replaced with oxy-gen. Subsequently, the specimen is heated from 400 to 800° C at 40° C/min. The final temperature is maintained for 15 min. The flow rate of the test gasses is 70 ml/min. At least 3 specimens col-lected from different regions of the finished part shall be tested.
5.2 Testing Parameters DSC
The test equipment can be, for example, the DSC7 from Perkin Elmer.
A plane parallel finished part section weighing approx. 10 mg is used as the specimen.
The specimen is heated from 50 to 310° C at 10° C/min. Subsequently, the specimen is cooled down to 150° C at 5° C/min and then reheated at 10° C/min to 310° C. The examination is con-ducted in the presence of room atmosphere.
To evaluate the enthalpy of fusion of the polymer, the residue determined in the thermogravimetry must be subtracted from the real specimen weight.
5.3 Heat
Aging
Aging in the mechanical circulation oven acc. to VDA 675 310. Aging times and temperatures shall be agreed upon. Measurements to be taken after cooling to room temperature to (23 ± 2) °C.
5.4 Aging in Operating Fluids
The following conditions apply to aging in operating fluids:
5.4.1 Gasoline
Aging is conducted in FAM test fluid DIN 51 604-B (FAM 2):
Composition:
─84.5 volume percent FAM test fluid acc. to DIN 51 604-A (FAM 1),
─15.0 volume percent methanol
─0.5 volume percent water
If needed, other test fluids can be used (deviation acc. to drawing).
168 h aging (other aging times acc. to drawing specifications) at room temperature (23 ± 2)° C; after aging the specimens are dabbed off with filter paper (Schwarzband); 1 min thereafter, the evalua-tions are conducted (in justified cases, the evaluation can be conducted even 15 minutes after re-moval, but this requires agreement).
5.4.2 Diesel Fuel, Vegetable Oil Methyl Ester (PME)
168 h aging at room temperature (23 ± 2)° C. In justified cases, other aging times and test tem-peratures can be agreed upon.
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VW 501 23: 2000-10 Grease
5.4.3 Oil
and
96 h aging time. In justified cases, other aging times and test temperatures can be agreed upon.
Additive
5.4.4 Coolant
S3A standard specimens acc. to VDA 675 205 are aged in test fluid, which consists of 50 volume percent deionized water and 50 volume percent coolant additive acc. to TL 774, type D, at 135° C in the autoclave. Test times are subject to agreement. The liquid volume must be 150 to 180 times the specimen volume. Subsequently, the specimens are cooled in the test fluid; the cooling proc-ess to (23 ± 2)° C must be completed within 2 hours, after which the specimens are measured.
Fluid
5.4.5 Brake
The specimens are aged for 70 h at 120° C in 75 ml brake fluid. To do this, tightly closable glass containers with approx. 250 ml volume and 50 mm diameter shall be used acc. to ISO 4928. After the test is over, the rubber parts in the container are acclimatized in the container at (23 ± 2)° C for 60 to 90 min. Subsequently, the specimens are removed from the liquid, rinsed briefly in isopropyl alcohol (max. 10 s) and dried with a clean, fiber-free towel. The measurements shall be taken within 60 min after being rinsed in alcohol.
Standards
6 Referenced
PV 1303Plastic Films, Planar Fabrics, Continuous Xenon Arc Exposure
PV 3902Plastic Films, Planar Fabrics, Lightfastness, Weather Fastness
PV 3929Non-Metallic Materials, Weathering in Dry Heat
PV 3930Non-Metallic Materials; Weathering in Humid Heat
PV 3935Plastics and Rubber; Pyrolysis Gas Chromatography / Mass Spectrometry
PV 3936Polymer Materials; Resistance Testing to Integral Parts of the Crankcase Gasses
TL 726Transmission Oil API GL 4 SAE 75W / SAE 80W, Material Requirements
TL 735Universal Grease, Lubricant Requirements
TL 745Multi-Purpose Low-Temperature Grease, Lubricant Requirements
TL 766Brake Fluid; Material Requirements
TL 774Ethylene Glycol-Based Coolant Additive, Material Requirements
TL 788Diesel Fuel, Fuel Requirements
TL 521 85Reference Engine Oil C.20 SAE 5W-40
TL 1010Materials for Vehicle Interiors, Burning Behavior; Material Requirements
VW 2.8.1Rubber; Material Requirements and Testing
VW 011 55Vehicle Supply Parts, General
VW 501 80Vehicle Interior Components, Emissions Behavior
VW 911 01Environmental standard for vehicles, vehicle parts, materials, operating fluids, avoidance of hazardous substances
VDA 675 106Rubber Components in Motor Vehicles; Test Methods for Identification; Den-sity
VDA 675 202Rubber Components in Motor Vehicles; Test Methods for Determination of Properties; Shore A and D
VDA 675 205Rubber Components in Motor Vehicles; Test Methods for Determination of Properties; Stress / Strain Behavior; Tensile Test
VDA 675 211Rubber Components in Motor Vehicles; Test Methods for Determination of Properties; Stress / Strain Behavior, Tear Propagation Strength Test (Trouser
Test Piece)
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VDA 675 219Rubber Components in Motor Vehicles; Test Methods for Determination of Properties; Creep and Relaxation; Rebound Resilience
VDA 675 310Rubber Components in Motor Vehicles; Test Methods for Resistance, Heat Aging
DIN 51 604-1FAM Test Fluid for Polymer Materials; Composition and Requirements
DIN 51 604-2FAM Test Fluid for Polymer Materials; Containing Methanol; Composition and Requirements
DIN V 51 606Liquid Fuels; Diesel Fuel from Vegetable Oil Methyl Ester (PME), Minimum Requirements
DIN EN ISO 179Plastics; Determination of Charpy Impact Resistance
DIN EN ISO 306Plastics, Thermoplastic materials; Determination of Vicat softening tempera-ture
ISO 4928Cups, Seal for Wheel Brake Cylinder