Foamed Leatherette The English translation is believed to be accurate. In case of discrepancies the German version shall govern. Material Requirements 6 types: without index (= O), A, B, C, D, E Konzernnorm Descriptors: leatherette, upholstery cover, foamed leatherette, seat TL 520 61 D Changes The following changes have been made as compared to Technical Supply Specification TL 520 61, 2003-10: ─ ─ ─ Test Specifications PV 1300, PV 3406 and PV 3903 removed Type A adapted to the standard production status Scope restricted for type without index, B, C, D and E Previous issues 1978-07; 1978-10; 1981-03; 1982-09; 1983-04; 1987-03; 1988-07; 19-07; 1995-12; 2003-10 1 Scope This TL standard specifies the material requirements for foamed leatherette, e.g. upholstery material. Do not use type without index, B, C, D or E for new designs! 2 Description Foamed leatherette according to TL 520 61 3 3.1 ─ Requirements Types TL 520 61 TL 520 61-A TL 520 61-B TL 520 61-C TL 520 61-D TL 520 61-E Foamed leatherette, HF-weldable, for e.g. upholstery material for seats and sides with abrasion-resistant finish. Not for new design! Foamed leatherette, HF-weldable, for e.g. seat base leather and upholstery material for back of the backrest area without abrasion-resistant finish. Foamed leatherette, HF-weldable, for e.g. upholstery material with low static elongation. Abrasion-resistant finish as required. Not for new design! Foamed leatherette, sewn, for e.g. sandwich lamination for seat and backrest center parts without abrasion-resistant finish. Not for new design! Foamed leatherette, HF-weldable, for e.g. covering of the front seat for the back of the backrest area without abrasion-resistant finish. Not for new design! Foamed leatherette, HF-weldable, for e.g. tarpaulin for load compartment cover without abrasion-resistant finish. Not for new design! ─ ─ ─ ─ ─ Form FE 41 - 01.05 Page 1 of 10 Fachverantwortung/Responsibility K-QS-31 Frau Pieper Tel: -24202 Dr. Schilling Normung/Standards (EZTD, 1733) Frau Krenz Tel: +49-5361-9-48869 Sobanski Confidential. All rights reserved. No part of this document may be transmitted or reproduced without the prior permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via the B2B supplier platform “www.vwgroupsupply.com”. © VOLKSWAGEN AG Norm vor Anwendung auf Aktualität prüfen / Check standard for current issue prior to usage. Klass.-Nr. 55 27 0 February 2005 Page 2 TL 520 61: 2005-02 D 3.2 General requirements Approval of first supply and changes according to Volkswagen standard VW 011 55. Emission behavior according to VW 501 80. Colorimetric evaluation according to VW 501 90. Avoidance of hazardous substances according to VW 911 01. For complete testing, at least 2 m2 roll stock is required. 3.3 Appearance and processing behavior Grain and color pattern must be uniform. The foamed leatherette must be free of foreign matter or substances that could negatively impact the high-frequency weldability and the bond hardenability. The open-cell PUR foam must flame-laminate to the foamed leatherette properly. No color change shall occur on the leatherette when it is tensioned; in addition, the material shall not have any distortion after unrolling. It must be possible to process it properly, i.e., according to the assembly working conditions. In addition, the structures of the lower layers must not be visible on the surface (writing effects). The laminating devices for the leatherette knit fabric and the PA6 substrate shall not run in opposite directions. 3.4 Conditioning Prior to testing, the specimens must be conditioned for at least 24 h in the DIN 50014 – 23/50-2 standard climate. 3.5 Evaluation of the measuring results The required numerical values apply to each individual measurement. 4 Material For requirements, see Table 1. Page 3 TL 520 61: 2005-02 D Table 1 No. 1 Property Material and structure Unit Type without index A B C Foamed PVC with compact PVC top coat, flat and artificial grain laminated on textured polyester knit fabric and back open-cell PUR foam according to released sample with PA6 base knit fabric acc. to TL 487-A Acc. to requirement 0.20 ± 0.05 0.20 ± 0.5 – – 740 ± 40 14 + 1 40 + 5 1,300 to 1,400 ≥ 80 – ≥ 75 – 740 ± 40 D Foamed PVC with compact, grained PVC top coat laminated on textured polyester knit E Textured polyester knit fabric embedded in foamed PVC with face fabric, compact, flat-grained PVC top coat 2 3 3.1 3.2 4 5 5.1 Color Thickness PVC top coat see Section 5.1 Foamed plastic after flame lamination (final thickness) Gross density of the foam material acc. to DIN EN ISO 845 before flame lamination Weight per unit area acc. to Section 5.2 Total structure mm mm kg/m3 g/m2 g/m2 g/m2 0.20 ± 0.05 – – 5.2 5.3 Textured PES knit fabric PA6 base knit fabric ≥ 70 Page 4 TL 520 61: 2005-02 D No. 6 Property Tear strength per 5 cm specimen width (total structure) see Section 5.3 6.1 As-received condition 6.1.1 Length 6.1.2 Width Unit Type without index A B C D E N N ≥ 300 ≥ 300 ≥ 250 ≥ 300 ≥ 300 ≥ 250 ≥ 350 ≥ 250 6.2 High-temperature test 7 d at +120 °C in mechanically circulated air see Section 5.7 6.2.1 Length N 6.2.2 Width N ≥ 500 ≥ 600 In weft direction, the PA base knit fabric may tear before the leatherette ± 15% as compared to x as-received condition ± 15% as compared to x as-received condition ≥ 400 ≥ 400 No embrittlement or crumbling of the foam from manually applied bending stress. In weft direction, the PA base knit fabric may tear before the leatherette. ± 15% as compared to x as-received condition ± 15% as compared to x as-received condition Page 5 TL 520 61: 2005-02 D No. 7 7.1 7.1.1 7.1.2 7.2 7.2.1 7.2.2 7.3 7.3.1 7.3.2 8 Property Unit Elongation acc. to PV 3909 (total structure) Static elongation 50 N load Length % Width % Permanent elongation Length % Width % Tear propagation strength acc. to DIN 53356 Length N Width N Adhesion acc. to DIN 53357 (per 5 cm specimen width) (entire scatter range) PVC coating/textured PES knit fabric N Length and width see Section 5.4 Foamed leatherette/foamed plastic N Length and width see Section 5.4 Foamed leatherette/base knit fabric N Length and width see Section 5.4 Stitch tear resistance acc. to DIN 53331, based on material thickness Length N Width N Type without index 20 ± 6 34 ± 10 ≤ 3 ≤ 6 ≥ 35 ≥ 24 A 20 ± 5 35 – 10 ≤ 2 ≤ 2 - - B 8 ± 2 8 ± 2 C 25 ± 5 55 ± 10 ≤ 3 ≤ 6 ≥ 30 ≥ 24 ≥ 20 ≥ 16 D 8 ± 3 27 ± 5 E 8.1 ≥ 30 – 8.2 – ≥ 15 – 8.3 – ≥ 20 – 9 9.1 9.2 ≥ 35 ≥ 30 – – ≥ 40 ≥ 45 Page 6 TL 520 61: 2005-02 D No. 10 Property Abrasion characteristics according to PV 3912; first detectable surface damage at (23 ± 2) °C Number of strokes Unit Type without index ≥ 1,500 A – B ≥ 1,500 (depending on requirements) ≥ 30 (depending on requirements) C D – E 11 ≥ 30 Air permeability acc. to DIN 53887 for l/min/ 22100 cm 50 cm test area and 2 mbar vacuum 12 Change in thickness after loading and unloading (return capability) Loss of thickness after 5 h under a 10 kg load at 350 N/100 cm2 preload, followed by 2 h of complete unloading 12.1 Load application test % (23 ±) °C 12.2 (50 ± 3) °% C Unload at (23 ± 2) °C 13 Compression pressure acc. to DIN EN ISO 3386-1 (at 50% compression v = 30 mm) 13.1 As-received condition kPa 13.2 After 168 h at +120 °C in mechanically circulated air 14 Low-temperature behavior 14.1 Ball drop test according to PV 3905 -30 °C, ball drop height 230 mm optionally 14.2 Fold-bend test acc. to DIN 53361 8 h at -40 °C (specimens conditioned in device) 15 Resistance to water 22 h at (23 ± 2) °C kPa – ≥ 30 – – – – – ≤ 3 ≤ 6 ≤ 10 ≤ 10 No tearing or breaking of specimens – – – – – No cracking along bending edge No cracking along bending edge Temporary fading according to gray scale level ≥ 4 according to DIN 20105-A02 is permissible; no grain image change. – Temporary fading according to gray scale level ≥ 4 according to DIN 20105-A02 is permissible; no grain image change. Page 7 TL 520 61: 2005-02 D No. Property 16 Colorfastness 16.1 To light acc. to PV 1303 16.1.1 3 exposure periods 16.1.2 5 exposure periods Unit Type without index A B C D E Gray-scale level ≥ 4 acc. to DIN EN 20105-A02 – 16.2 To water (filter paper test) see Section 5.5 16.3 To abrasion (Schopper test) face fabric acc. to Section 5.6 16.3.1 After 1,000 test cycles at a contact pressure of 10 N – Gray-scale level ≥ 4 acc. to DIN EN 20105-A02 Gray-scale level 5 acc. to DIN EN 20105-A03; intermediate level 4.5 permissible – – Gray-scale level 5 acc. to DIN EN 20105-A03; intermediate level 4.5 permissible 16.3.2 After 2,000 test cycles at a contact pressure of 20 N Gray-scale level 5 acc. to DIN EN 20105-A03; intermediate level 4.5 permissible – Gray-scale level 5 acc. to DIN EN 20105-A03; intermediate level 4.5 permissible Gray-scale level 5 acc. to DIN EN 20105-A03; intermediate level 4.5 permissible – 16.4 High-temperature test see Section 5.7 7 d at +120 °C in mechanically circulated air; exception color white 24 h at +120 °C in mechanically circulated air 17 Burning behavior acc. to US Regulation 571.302 18 Permanent bending behavior 120 h at +100 °C in mechanically circulated air [approx. (150 x 150) mm specimen sections with the upper side of the material folded in accordion fashion] The leatherette must not become hard and brittle and must not roll up; there must not be any deterioration when compared to the release status Gray-scale level 3 D acc. to DIN EN 20105-A02, however no color shift Acc. to TL 1010 (if specified in drawing and/or release) – No visibly per-ceptible impair-ment of the PVC coating, such as discoloration and/ or tackiness after opening the fold Page 8 TL 520 61: 2005-02 D 5 5.1 Notes on testing PVC top coat Measurement of the thickness with reflected light microscope at 30 x or 40 x magnification. 5.2 Weight per unit area At least three 100-cm2 specimens are taken from different points along the entire width of the roll, weighed and the weight obtained converted to 1 m2. The same specimens that were used to determine the weight of the total structure are now used to determine the individual structure weights. After separating the PVC covering from the PES knit fabric substrate or in the case of type C the PA base knit fabric from the PUR foam, the knits must be cleaned of any adhering residue using tetrahydrofurane. The knits are dried for 2 h in mechanically circulated air at +70 °C. After cooling to (23 ± 2) °C, the weights shall be determined. 5.3 Tear strength Determination of the tear strength with standard test specimen (traverse speed: 100 mm/min; distance between clamps of the test device: 100 mm) on a minimum of three specimens taken parallel to the courses. The specimens shall be taken over the total width of the roll. To avoid cracks in the specimens near the clamps of the tensile test machine, “shoulder” strips are produced using a template equivalent to the shape of the standard test specimen (see Figure 1). Figure 1 Page 9 TL 520 61: 2005-02 D 5.4 Adhesion When evaluating, not only the peak values but also the entire separating force scatter range is recorded. 5.5 Colorfastness to water A (50 x 50)-mm specimen shall be wetted with approx. 2 cm3 deionized water, placed between filter paper (Schleicher & Schüll, Blauband 53) and glass plates and loaded with 50 N for one hour. The filter paper shall be evaluated for bleeding using the gray-scale level according to DIN EN 20105-A03. 5.6 Colorfastness to abrasion Abrasion test on 100 cm2 round specimen of leatherette against ECE-cotton fabric according to DIN EN ISO 105-X12 Specimen curvature Abrasion surface Specimen size of nettle cloth approx. 5 mm 50 cm2 (280 x 95) mm The ECE cotton fabric is clamped into the holding fixture on the test machine together with a similar size wool felt pad according to TL 380. 5.7 High-temperature test DIN A41-sized specimens shall be taken parallel to the threads in lengthwise and crosswise directions. After that, both broad sides of the specimens are stamped by a double punch with four holes spaced approximately 25 mm from the edge. These holes are used to hold the hooks welded to the round bars (see Figure 2). With the exception of material type C, a 6-mm Ø round bar with a weight of approximately 80 g is attached to the ”bottom side” of each test specimen. This is done to make heavier the sections that are hanging vertically. Then the specimens are aged at +120 °C with mechanically circulated air at a distance of 50 mm to each other. At the end of the high-temperature test and subsequent conditioning in standard climate according to DIN 50014–23/50-2, the tearing and bending specimens are removed from the sections according to Figure 2 (sample shape drawn before the high-temperature test). Figure 2 1 DIN A4 = German standard paper size Page 10 TL 520 61: 2005-02 D 6 TL 380 TL 487 TL 1010 PV 1303 PV 3905 PV 3909 PV 3912 VW 011 55 VW 501 80 VW 501 90 VW 911 01 DIN 50014 DIN 53331 DIN 53356 DIN 53357 DIN EN 1876-1 DIN EN 20105-A02 DIN EN 20105-A03 DIN EN ISO 105-X12 DIN EN ISO 845 DIN EN ISO 3386-1 DIN EN ISO 9237 Referenced standards2 Wool Felt for Testing Purposes; Material Requirements PA-Gewirke; Werkstoffanforderungen (PA-Knit; Material Requirements – currently only available in German) Materials for Vehicle Interiors; Flammability, Material Requirements Non-Metallic Materials; Exposure Test of Passenger Compartment Components Organic Materials; Ball Drop Test Non-Metallic Planar Fabrics; Measurement of Static and Permanent Elongation Nichtmetallische Flächengebilde; Verschleißprüfung (Non-Metallic Planar Fabrics; Wear Test – currently only available in German) Vehicle Supply Parts; Approval of First Supply and Changes Components in Passenger Compartment; Emission Behavior Components of the Vehicle Interior Trim; Colorimetric Evaluation Environmental Standard for Vehicles; Vehicle Parts, Materials, Operating Fluids; Avoidance of Hazardous Substances Climates and Their Technical Application; Standard Atmospheres Testing of Leather, Determination of the Stitch Tear Resistance Testing of Artificial Leather and Similar Sheet Materials; Tear Growth Test Testing of Plastics Sheets; Adhesion Test Rubber or Plastics Coated Fabrics – Low Temperatures Tests – Part 1: Bending Test Textiles – Tests for Colour Fastness – Part A02: Grey Scale for Assessing Change in Colour Textiles; Tests for Colour Fastness – Part A03: Grey Scale for Assessing Staining Textiles; Tests for Colour Fastness – Part X12: Colour Fastness to Rubbing Cellular Plastics and Rubbers – Determination of Apparent (Bulk) Density Polymeric Materials, Cellular Flexible – Determination of Stress-Strain Characteristic in Compression – Part 1: Low-Density Materials. Textiles – Determination of Permeability of Fabrics to Air 2 In this section, terminological inconsistencies may occur as the original titles are used.
