Group standard TL 533
Issue 2016-08
Class. No.: 55121
Descriptors: polyethylene, PE, protective cap, trim, air duct
High-Density Polyethylene
Requirements on Materials
Previous issues
TL 533: 1961-11, 1971-12, 1973-01, 1993-02, 2004-01, 2011-02
Changes
The following changes have been made to TL 533: 2011-02:
– Section "Applicable documents" updated
1 Scope
These Technical Supply Specifications (TL) specify the material requirements for high-density poly‐
ethylene for finished parts (e.g., for protective caps, trims and air ducts).
2 Designation
High-density polyethylene as per TL 533
3 Requirements
3.1 General requirements
Approval of first supply and changes as per Volkswagen standard VW 01155.
Emission behavior as per VW 50180.
Avoidance of hazardous substances as per VW 91101.
25 parts are required for complete testing.
Always use the latest version of this standard.
This electronically generated standard is authentic and valid without signature. Page 1 of 5
The English translation is believed to be accurate. In case of discrepancies, the German version is alone authoritative and controlling.
Technical responsibility The Standards department
GQL-P/3 Wolfgang Schmoller Tel.: +49 5361 9 37831
GQL-P/3 Eckart Herrmann Tel.: +49 5361 9 42116 EKDD/2 Stefanie Reiss EKDD
GQL-P Dr. Jiping Liu Tel.: +49 5361 9 41184 Thomas Behrens
All rights reserved. No part of this document may be provided to third parties or reproduced without the prior consent of one of the Volkswagen Group’s Standards departments.
© Volkswagen Aktiengesellschaft VWNORM-2015-07d
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TL 533: 2016-08
3.2 Properties
The surface and interior of the finished parts must be free of flaws and processing defects such as
flow lines, voids, cracks, etc. Sink marks at the base of ribs and stiffenings are permissible only if
they do not adversely affect the part's function or appearance.
3.3 Processing and finished part properties
It must be possible to process the molded parts properly, i.e., according to the assembly working
conditions.
3.4 Material
See section 5.1.
Polyethylene, heat- and UV-stabilized.
3.5 Manufacturing
Injection molding
3.6 Color
As per drawing.
3.7 Marking as per VDA 260
> PE <
3.8 Marking
As per drawing.
3.9 Evaluation of the measurement results
The required numerical values apply to each individual measurement.
4 Required properties
See table 1.
Table 1
No. Property Unit Requirement
1 Density g/cm 3
0.945 to 0.965
as per DIN EN ISO 1183-1
2 Melting temperature °C 127 to 135
as per DIN EN ISO 3146
3 Melt mass-flow rate g/10 min 4 to 8
as per DIN EN ISO 1133-1
4 Ball indentation hardness N/mm2 ≥ 30
as per DIN EN ISO 2039-1 and section 5.2
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TL 533: 2016-08
No. Property Unit Requirement
5 Hardness Shore D 65 ±3
as per DIN ISO 7619-1
(requirement applies only if the ball inden‐
tation hardness cannot be measured)
6 Elevated-temperature behavior The parts must not exhibit any changes in shape that
see section 5.3 adversely affect their function. The surface must not
change, e.g., form cracks.
7 Low-temperature behavior The parts must remain fully functional and be free of
24 h of aging of at least one complete fin‐ damage at low temperatures. The parts must not have
ished part at (-40 ±1) °C any cracks or other damage either at low temperatures
or after heating up to 23 ±2 °C.
8 Colorimetric analysis Without complaints
as per VW 50190
(requirement applies only to visible parts in
the vehicle interior or if specified in the
drawing).
9 Weather resistance
9.1 Resistance to open-air weathering Without complaints
as per VW 50185 and section 5.4
9.2 Behavior in sun test Brightness difference delta L compared to as-received
as per PV 1323 condition ≤ 2 as per gray-scale level ≥ 4 as per
(requirement applies only to visible parts DIN EN 20105-A02.
on the vehicle exterior or if specified in the
drawing).
9.3 High-temperature light exposure as per PV 1303
(requirement applies only to visible parts in the vehicle interior or if specified in the drawing)
Number of exposure periods as per the drawing,
unless defined as per no. 9.3.1 to 9.3.3
9.3.1 For areas exposed to indirect solar radia‐
tion
3 exposure periods
The exposed surface must not suffer any changes in
9.3.2 For areas exposed to direct solar radiation
comparison to the as-received condition, e.g., color
(e.g., door waist rail)
changes, chalking, and/or cracking.
5 exposure periods
Gray-scale level ≥ 4 as per DIN EN 20105-A02
9.3.3 For areas exposed to maximum solar radi‐
ation (e.g., rear shelf)
10 exposure periods
10 Flammability As per TL 1010
(if required in the drawing and/or release)
5 Notes on testing
5.1 Material
The identity test is performed with infrared spectroscopy.
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TL 533: 2016-08
5.2 Ball indentation hardness
The measurements must be performed on at least three 20 mm × 20 mm specimens (two meas‐
urements per specimen). The grain on specimens prepared from molded parts with grain on one
side must be removed using a surface grinding machine. The flat surface created in this way
serves as the contact surface. The measurement is taken on the untreated reverse side.
5.3 High-temperature behavior
Heat aging test as per DIN 53497, method B.
Aging temperature (80 ±1) °C; aging period 48 h.
5.4 Resistance to open-air weathering
Testing for resistance to open-air weathering must be performed with the parts installed in the vehi‐
cle at the specified Volkswagen testing grounds for open-air weathering. For orientation purposes
and for risk assessment of visible finished parts on the vehicle exterior, the simulation methods as
per PV 3929 and PV 3930 must be applied, each over a 1-year cycle. For all other finished parts,
environmental cycle tests and aging tests at high temperature must be conducted with parameters
adapted to the location/function.
6 Applicable documents
The following documents cited in this standard are necessary to its application.
Some of the cited documents are translations from the German original. The translations of Ger‐
man terms in such documents may differ from those used in this standard, resulting in terminologi‐
cal inconsistency.
Standards whose titles are given in German may be available only in German. Editions in other
languages may be available from the institution issuing the standard.
PV 1303 Non-Metallic Materials; Xenon Arc Light Aging of Vehicle Interior Com‐
ponents
PV 1323 Non-Metallic Materials; UV Radiation on Thermoplastic Material, Out‐
side, in Sun Test
PV 3929 Non-Metallic Materials; Weathering in Dry, Hot Climate
PV 3930 Non-Metallic Materials; Weathering in Moist, Hot Climate
TL 1010 Materials for Vehicle Interiors; Burning Behavior; Material Requirements
VW 01155 Vehicle Parts; Approval of First Supply and Changes
VW 50180 Components in the Vehicle Interior; Emission Behavior
VW 50185 Vehicle Parts; Resistance to Open-Air Weathering
VW 50190 Interior Trim Components; Metrological Evaluation of Color and Gloss
Level; Visual Evaluation of Chrome Surfaces
VW 91101 Environmental Standard for Vehicles; Vehicle Parts, Materials, Operat‐
ing Fluids; Avoidance of Hazardous Substances
DIN 53497 Testing of Plastics; Hot Storage Test on Mouldings Made of Thermo‐
plastic Moulding Materials without External Mechanical Stressing
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TL 533: 2016-08
DIN EN 20105-A02 Textiles - Tests for colour fastness - Part A02: Grey scale for assessing
change in colour
DIN EN ISO 1133-1 Plastics - Determination of the melt mass-flow rate (MFR) and melt vol‐
ume-flow rate (MVR) of thermoplastics - Part 1: Standard method
DIN EN ISO 1183-1 Plastics - Methods for determining the density of non-cellular plastics -
Part 1: Immersion method, liquid pyknometer method and titration meth‐
od
DIN EN ISO 2039-1 Plastics - Determination of hardness - Part 1: Ball indentation method
DIN EN ISO 3146 Plastics - Determination of melting behaviour (melting temperature or
melting range) of semi-crystalline polymers by capillary tube and polariz‐
ing-microscope methods
DIN ISO 7619-1 Rubber, vulcanized or thermoplastic - Determination of indentation hard‐
ness - Part 1: Durometer method (Shore hardness)
VDA 260 Components of motor vehicles - Marking of material
