1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2007 08 14 N-STATUS Replaced by WSS-M9P9-A K. Mueller 2006 08 23 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.12, 3.13 Fixed numbering 3.6 & 3.8 1993 02 23 Released C10261363 B. Hennessey Printed copies are uncontrolled Copyright 2007, Ford
2、Global Technologies, LLC Page 1 of 6 WEATHERSTRIP/WINDLACE CO-EXTRUSION, ETHYLENE- WSD-M96D21-A3 PROPYLENE (EPDM) FOAM/ETHYLENE-PROPYLENE RUBBER (EPDM) WEATHERSTRIP/WINDLACE CO-EXTRUSION, ETHYLENE- WSD-M96D21-A4 PROPYLENE (EPDM) FOAM/POLY VINYL CHLORIDE (PVC) NOT TO BE USED FOR NEW DESIGN 1. SCOPE T
3、he material defined by this specification is a self-skinned closed cell expanded EPDM rubber weatherstrip co-extruded with a single or dual hardness EPDM rubber (Suffix -A3) or colored plasticised PVC (Suffix -A4) windlace which may contain a metal carrier. The weatherstrip may have areas flock coat
4、ed as shown on Engineering Drawings. 2. APPLICATION This specification was released originally for material used for sealing doors, liftgates, etc. or as specified on Engineering Drawings. The finished part meets the performance requirements of WSD-M9P8-A. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS F
5、OR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts. When no
6、t feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm ENGINEERING MATERIAL SPECIFICATIONWSD-M96D21-A3/A4Printed copies are
7、 uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 2 of 6 3.5 ORIGINAL PROPERTIES- EPDM FOAM 3.5.1 The EPDM foam shall conform to SAE J18 2A4 B Z1. Or as specified on the Engineering Drawing. Where: Z1 = Water Absorption 2.5% max (ASTM D 1056, except use a sample 50 mm in length cut fr
8、om the weatherstrip) Material Material 3.6 ORIGINAL PROPERTIES- EPDM RUBBER (SUFFIX A3) (Single or Dual Hardness Constructions) 1 2 3.6.1 Hardness, International, IRHD 55 to 74 75 to 85 (ASTM D 1415, micro method on parts macro method on slabstock) 3.6.2 Tensile Strength, MPa, min 8.0 6.0 (ISO 37/AS
9、TM D 412, Die C) 3.6.3 Elongation at Break, %, min 250% 150% (Test Method according to para 3.6.2) 3.6.4 Modulus at 100% Elongation, MPa 1.5 - 5.0 3.5 - 8.5 (Test Method according to para 3.6.2) 3.6.5 Tear Strength, KN/m, min 18 18 (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.6.6 Brittlene
10、ss Point, max -40 C -40 C (ISO 812, Type B specimen/ASTM D 2137, Method A) 3.6.7 Ozone Resistance, Rating, max 0 0 (FLTM BP 101-01, Procedure A) 3.6.8 Compression Set, %, max 50 50 (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 22 h at 100 +/- 2 C) ENGINEERING MATERIAL SP
11、ECIFICATIONWSD-M96D21-A3/A4Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 3 of 6 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 100 +/- 2 C) 3.7.1 Hardness Change, max + 12 3.7.2 Tensile Strength Change, max -20% 3.7.3 Elongation Change, max
12、 -40% 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 70 +/- 2 C) 3.8.1 Hardness Change, max +12 3.8.2 Tensile Strength Change, max -30% 3.8.3 Elongation Change, max -50% 3.8.4 Visual Evalu
13、ation No surface tackiness or cracks when folded flat against itself. 3.9 ORIGINAL PROPERTIES- PVC (SUFFIX A4) 3.9.1 The PVC material shall conform to WSK-M4D676-A6 or as specified on the Engineering Drawing. 3.10 ORIGINAL PROPERTIES- METAL CARRIER (IF PRESENT) 3.10.1 The metal carrier shall be manu
14、factured from cold-rolled mild steel strip Rm 590 - 690 MN/m2, R (0.2p) 540 MN/m2min. or as specified on the Engineering Drawing. 3.11 FINISHED PART REQUIREMENTS 3.11.1 Appearance The color, grain and finish of the windlace and the expanded rubber weatherstrip shall be as specified on the Engineerin
15、g drawing. Both windlace and weatherstrip rubber shall be non-blooming, under both service and storage conditions. 3.11.2 Compression Characteristics The Compression Set, Compression Load and Residual Compression Load shall conform to the requirements tabulated below. The Force/Deflection characteri
16、stics in the vehicle installation condition shall be as specified on the Engineering Drawing. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D21-A3/A4Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 4 of 6 T A B L E 1 COMPRESSION SET COMPRESSION RESIDUAL LOAD COMPRESSION
17、LOAD (% max) (N) (% min) A As received - As Measured - B 30 min at 100 C +/- 2 C 25 - 65 C 4 hours at -40 C +/- 1 C 15 - 90 D 24 hours at 70 C +/- 2 C 40 - 55 E 1000 hours at 70 C +/- 2 C 75 - 30 Test Methods: 1) Compression Load. Cut from a finished part 15 samples each 250 mm, in length (3 samples
18、 for each test) and assemble each onto a suitable carrier as shown in Fig. 1. Place the test assembly under a flat compression plate mounted onto the load cell of a Tensile Testing Machine operating in the compression mode. Alternatively if specified on the Engineering Drawing, use the Load/ Deflect
19、ion fixture as shown on the Engineering Drawing. Slowly bring the compression plate into contact with the top of the weatherstrip so that it is only just in contact along the entire length of the test specimen. Determine the original height (H0) as shown in Fig. 1. 2) Determine the Compression Load
20、(P1) by deflecting the sample to 14 mm height or to the deflection specified on the Engineering Drawing (H1) as shown in Fig. 2. Record the load within 5 seconds of reaching the specified compression. Similarly deflect the further 12 samples to 14 mm height or to the deflection specified on the Engi
21、neering Drawing (H1) and expose three samples each to the temperatures and times specified under B, C, D and E of Table 1. Release the load at end of exposure and after 30 +/- 5 minutes conditioning at 23 +/- 2 C. re-compress to (H1) and measure the load (P2) within 5 seconds. 3) Calculate Residual
22、Compression Load as following:- Percentage Residual Compression Load = (P2/P1)x 100 Where: P1 = Compression load in as received condition at deflection H1 P2 = Compression load at deflection H1 after ageing to conditions B, C, D and E ENGINEERING MATERIAL SPECIFICATIONWSD-M96D21-A3/A4Printed copies
23、are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 5 of 6 4) Compression Set. Cut from a finished part 12 samples each 250 mm, in length (3 samples for each test) and assemble each onto a suitable carrier as shown in Fig. 1. Place the test assembly under a flat compression plate mou
24、nted onto the load cell of a Tensile Testing Machine operating in the compression mode. Slowly bring the compression plate into contact with the top of the weatherstrip so that it is only just in contact along the entire length of the test specimen. Determine the original height (H0) as shown in Fig
25、. 1. 5) Deflect the 12 specimens to 14 mm height or to the deflection specified on the Engineering Drawing (H1) as shown in Fig. 3 and expose three samples each to the temperatures and times specified under B, C, D and E of Table 1. 6) Release the load at end of exposure and measure the new height (
26、H2) as in Paragraph 4) after 30 +/- 5 minutes conditioning at 23 +/- 2 C. 7) Calculate Compression Set as following:- Percentage Compression Set = (H0 - H2)/(H0 - H1)x 100 Where: H0 = Original height of test specimen as received. H1 = Height of test specimen under the specified constant deflection.
27、H2 = Height of test specimen 30 min after removal of load. 3.11.3 Adhesion of EPDM Foam to Windlace The bond strength must exceed the cohesive strength of the foam when attempts are made to separate the foam from the windlace by hand after the following conditions: As delivered. After 24 h at 70 C +
28、/- 2 C. After 24 h immersion in distilled water at 23 C +/- 1 C. After removal from the oven or water bath, condition for 1 hour +/- 10 minutes at 23 +/- 2 C prior to attempting to separate the components. 3.11.4 Performance Requirements The part shall conform to the performance requirements of WSD-
29、M9P8-A. The windlace shall conform to the interior parts requirements. The foam weatherstrip shall conform to the exterior parts requirements except Clause 3.9.1.1 irradiation shall be 200 kJ/m2except as shown on the Engineering Drawing. Clauses 3.9.1.2 and 3.9.1.3 not required. ENGINEERING MATERIAL SPECIFICATIONWSD-M96D21-A3/A4Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 6 of 6
