1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 11 08 Activated M. Mehandru Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 4 RUBBER MODIFIED POLYVINYL CHLORIDE (PVC), ELASTOMER WSS-M4D998-A1 1. SCOPE The materials defined by this specification a
2、re rubber modified flexible polyvinyl chloride, injection and/or extrusion molding compound. 2. APPLICATION This specification was released originally for materials used for exterior belt moldings. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part produce
3、rs must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 MOLDED TEST SPECIMEN 3.2.1 Preparation of Test Specimens Unless otherwise specified, all test shall be conducted on specimens die cut from ungra ined compression molded plaques 150 x 150 x 2.0 +/- 0.
4、2 mm molded according to ISO 293. 3.2.2 Density, g/cm3, max 1.35 (ISO 1183, Method A/ASTM D 792, Method A) 3.2.3 Hardness, Durometer A 57 +/- 6 (ISO 868/ASTM D 2240, 6 mm thick plied-up specimens, 15 s delay) 3.2.4 Tensile Strength at Break, MPa, min 6.0 (ISO R 37, type 1/ASTM D 412, 500 mm/min test
5、 speed) 3.2.4.1 Elongation at Break, %, min 150 (Test Method according to para 3.4.4) 3.2.5 Tear Strength, kN/m, min 6.0 (ISO 34, Method B, Procedure A/ASTM D 624, Die C) 3.2.6 Cold Flexibility at -30 C No cracks (FLTM BN 102-01, except specimen 25 x 150 mm, minimum and 19-20 mm mandrel) 3.2.7 Compr
6、ession Set, max 35% (ISO 815/ASTM D 395, Method B, 22 h at 70 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D998-A1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 4 3.2.8 Color Stability (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 80 +/- 2 C) A
7、fter exposure the material shall not exhibit color change in excess of AATCC rating 4 (AATCC Gray Scale for Evaluating Change in Color, 10 step). In addition there shall be not be any staining, spewing, loss of gloss. 3.2.9 Short Term Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air change
8、s/h, 168 h at 100 +/- 2 C 3.2.9.1 Hardness, Change, max 5 points 3.2.9.2 Tensile Strength Change +/- 25% (Test Method per para 3.4.4) 3.2.9.3 Elongation Change +/- 25% (Test Method per para 3.4.4) 3.2.9.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.2.10 Long T
9、erm Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.2.10.1 Tensile Strength Change +/- 25% (Test Method per para 3.4.4) 3.2.10.2 Elongation Change +/- 25% (Test
10、Method per para 3.4.4) 3.2.10.3 Weight Change, max 10% (50 x 25 x 2 +/- 0.2 mm specimen) 3.2.11 H2S Staining Rating 5 (FLTM AN 102-01) 3.2.12 Paint Staining (FLTM BP 153-01, Procedure A, 25 x 50 x 2.0 +/- 0.2 mm specimen) No visible stain or change in surface appearance produced on the painted panel
11、 beyond the boundaries of the test specimen. Note: The raised welting of the painted surfaces in direct contact with the test specimen resulting from this test method is characteristic of plasticized vinyl compounds and shall not be cause for rejection. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D998-A
12、1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 4 3.3 WEATHERING RESISTANCE After exposure in accordance with 3.5.1, and 3.5.2 the material shall show no color change in excess of specified Grey Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In add
13、ition, there shall be no cracking, crazing or other deterioration. Specimen bent around 25 mm diameter mandrel shall not show any cracks when examined in bent condition. Material shall not exhibit mildew growth and shall not exhibit mildew growth and/or staining after exposure according to 3.5.2. A
14、slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by polishing with Ford car polish (auto wax) at permission of the affected Product Development Materials Activity. 3.3.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, modified (Type “S“ Borosilicate inn
15、er and outer filers, 0.55 W/m2radiant exposure) 3000 hour exposure, specimen size: 150 mm in length) 3.3.2 12 months Florida and Arizona Rating 4 (FLTM BI 160-01, 5 south direct weathering inland, specimen size: 150 x 100 mm minimum, 2.0 +/- 0.2 mm thick, molded in smooth polished mold) 3.4 ROAD ASP
16、HALT STAIN RESISTANCE, max (excludes black) 1.5 E Test Method: Prepare a solution of 50% asphalt cement and 50% unleaded gasoline. Dip the test specimen in the solution for 10 seconds. Suspend specimen for 15 minutes allowing the solution to drain/evaporate. Clean specimen thoroughly with naptha. Us
17、e an untested portion of the part as the control. Before and after staining, measure the color per SAE J1545, CIELAB color space, 10 observer, illuminant D65, specular included. Calculate E. 3.5 ROSS FLEXING FATIGUE No tear propagation (ASTM D 1052, 200,000 cycles) from original notch. 3.6 FINISHED
18、PART REQUIREMENTS Finished part must conform to performance specification WSD-M9P8-A ENGINEERING MATERIAL SPECIFICATIONWSS-M4D998-A1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 4 4. GENERAL INFORMATION The information given below is provided for clarificat
19、ion and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION, m/m C x1-5(ASTM E 831 TMA) This testing is relevant only to unsupported applications. Applications requiring roll formed metal substrate are considered supported. Flow Direction (Machin
20、e Direction) Transverse to Flow (Cross Machine) 4.2 MOLD SHRINKAGE (For injection molded materials only), % (ISO 2577, approximately 150 x 100 x 2.0 +/- 0.2 mm injection molded plaque, separate Specimens required for each test) After 48 h at 23 +/- 2 C Flow Direction (Machine Direction) Transverse t
21、o Flow (Cross Machine) After 48 hours at 80 +/- 2 C Flow Direction (Machine Direction) Transverse to Flow (Cross Machine) After 30 minutes at 120 +/- 2oC Flow Direction (Machine Direction) Transverse to Flow (Cross Machine) 4.3 OZONE RESISTANCE, max Rating 0, No cracking (FLTM BP 101-01, Procedure A, tensile specimen, at visible at 2X magnification 50% elongation) 4.4 RECYCLING CODE PVC
