1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 11 Activated L. Schmalz, NA Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 6 CONVERTIBLE TOP PERFORMANCE SPECIFICATION WSS-M8P20-A 1. SCOPE This specification defines the standard performance re
2、quirements for exterior materials used in fully retractable convertible top assemblies. 2. APPLICATION This specification was released for the exterior material used for convertible top applications including well lining, reinforcements and binding. The headliner must meet requirements per WSS-M15P2
3、7-F Headliner Performance Specification except for paragraphs 3.4, 3.5, 3.11, 3.21 and 3.22. Visible painted metal parts must meet the requirements per WSS-M2P190-A Interior Metal Parts Paint Performance Specification. 3. REQUIREMENTS In addition to the requirements listed herein, the end-item conve
4、rtible top assembly shall meet all requirements of the material specifications for the individual components if applicable. See Table 1 for sample sizes and required testing. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standar
5、d Requirements for Production Materials (WSS-M99P1111-A). 3.2 SAMPLE SELECTION All evaluations shall be conducted on test specimens taken from production representative convertible top assemblies. 3.3 APPEARANCE (FLTM BI 109-01) The color, pattern, and finish shall match the approved Design Center m
6、aster sample, or shall be specified on the engineering drawing. 3.4 RESISTANCE PROPERTIES 3.4.1 Resistance to Mildew and Staining No evidence of fungal (ASTM G 21 and ASTM E 1428) growth or staining. 3.4.2 Resistance to Wicking (NA for well sling) None (SAE J913, 4h immersion, using 50% soap solutio
7、n) The fabric shall be treated to prevent wicking 3.4.3 Cold Flexibility (FLTM BN 102-01) Shall remain flexible and not crack when bent 180oaround the 6.4 mm mandrel at -30 oC. ENGINEERING MATERIAL SPECIFICATIONWSS-M8P20-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC
8、 Page 2 of 6 3.4.4 Resistance to W Flex The coating shall (FLTM BN 102-02) show no evidence of crazing, lifting, peeling, cracking or delamination from the fabric. Original 10,000 cycles After Heat Aging per para 3.4.8 4,000 cycles* After 1500 hrs Accelerated Weathering per para 3.6.1 4,000 cycles*
9、*Target requirement pending additional test data. 3.4.5 Resistance to Cleaning Agents, min Rating 4 (FLTM BN 107-01, 10 cycles, AATCC Evaluation Procedure 2) Test Procedure: Saturate white cotton cloth with the cleaners listed. Evaluate According to the AATCC Scale/ Cleaners Window cleaner (Windex o
10、r commercial equivalent product) All purpose cleaner (409 or commercial equivalent product) Motorcraft Detail Wash ZC-3-A or equivalent* Isopropyl Alcohol/water 50% v/v * Recommendation- Wolfsteins Pro Series RaggTopp Cleaner available at: http:/ 3.4.6 Fluid Spotting Resistance, min Rating 4 (FLTM B
11、I 168-01, Method B, AATCC Evaluation Procedure 1/ISO 105-A02) Test Fluids: (Body and Exterior Trim use, exclude diesel, coolant and engine oil No staining or change in color. 3.4.7 Soiling and Cleanability (N/A for well sling), min (FLTM BN 112-08 ISO 105-A03/AATCC Evaluation Procedure 2, grease, co
12、ffee, and AATCC soil only. Also apply body wax Use Motorcraft ZC-3-A Detail Wash or RaggTopp cleaner) Cleanability Rating 3 3.4.8 Heat Resistance, min Rating 4 (7 days at 80 +/-2 oC, AATCC Evaluation Procedure 1/ ISO 105-A02) 3.4.9 Environmental Cycling, min Rating 4-5 (AATCC Evaluation Procedure 1/
13、 ISO 105-A02) ENGINEERING MATERIAL SPECIFICATIONWSS-M8P20-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 6 All convertible top assemblies should test 5 cycles of: 3 h at 80 +/- 2oC 1 h at 23 +/- 2 oC and 50 +/-5% R.H. 3 h at -40 +/- 2 oC 1 h at 23 +/- 2 oC
14、and 50 +/-5% R.H. 16 h at 38 +/-2 oC and 95 to 98% R.H. 3.5 WEAR PROPERTIES 3.5.1 Resistance to Scuffing-VINYL ONLY, min 500 cycles (SAE J365, “A“ Head, 0.9 kg load) No evidence of lifting, peeling or excessive scuffing. 3.5.2 Resistance to Abrasion-VINYL ONLY, min 1000 cycles (SAE J948, CS10 wheels
15、, 1000 g load) The materials wear pattern and color shall be compatible in appearance with the adjacent unabraded areas. 3.5.3 Abrasion Resistance-ACRYLIC FABRIC ONLY, min Rating 4 (FLTM BN 158-01, 25,000 cycles, 140 mm diameter specimen head, 12 +/- 0.3 kPa, Specimen pressure, AATCC Evaluation Proc
16、edure 1/ISO 105-A02. Abrade acrylic fabric to acrylic fabric. AATCC rating on 140 mm diameter sample) No broken fibers or pattern distortion. 3.6 ACCELERATED 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 Gray Sc
17、ale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing or other deterioration. 3.6.1 Exterior Xenon Arc Weatherometer, min Rating 4 (SAE J2527 Atlas Water Cooled, Rotary Drum Xenon-Arc Apparatus only. Modified Type “S“ borosilicate inner and outer fil
18、ters, 0.55 W/m2 radiant exposure monitored at 340 nm). PVC or Acrylic Top Material /Binding 3000 h exposure Reinforcement NA 3.6.2 Interior Xenon Arc Weatherometer, min Rating 4 (FLTM BO 116-01, monitored at 420 nm) Well Lining-PVC surface 451.2 kJ/m2 exposure ENGINEERING MATERIAL SPECIFICATIONWSS-M
19、8P20-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 6 4. REQUIREMENTS-BONDING GRADE In addition to the requirements listed above, bonding grade materials must meet the following added requirements. The criterion for material acceptability for bonding grade
20、materials shall be the assemblys job performance. This means that the surface vinyl formulation must form a satisfactory bond when bonded to itself and equally to the vinyl backlite Material. Also, a satisfactory bond must be obtained between the cloth backing in the presence of a suitable adhesive
21、agent. 4.1 BONDED ASSEMBLY REQUIREMENTS 4.1.1 Resistance to Heating The vinyl coating on this material shall not blister, boil, burn, delaminate or char during the heat bonding process in either the warp or fill direction. Decorative embossing shall not get shiny or be removed during this processing
22、. 4.1.2 Shear Strength of Bonded Seam The strength of the bonded seam shall be greater than the material itself before and after exposure in the Weathermeter (per para 3.6.1) for 750 hrs. Test Method: Cut three 102 x 152 mm specimens from a production bonded assembly so that the bonded area is midwa
23、y along the 152 mm length and parallel to the 102 mm dimension. Insert the 102 mm ends in 25 mm in the jaws of the mechanical tester and pull at the rate of 305 mm/minute until either the bonded seam separates or the material fails. 4.1.3 Peel Strength of Bonded Seam, min As received - Vinyl to Viny
24、l 17 N Exposed - Vinyl to Vinyl 15 N As received - Fabric to Fabric 45 N Exposed - Fabric to Fabric 6 N Test Method: Cut 76 x 178 mm specimens from a production bonded assembly so that the bonded area is centered and parallel to the 178 mm dimension. Expose specimens in for 750 hrs. in the Weatherme
25、ter (per para 3.6.1). Prior to pulling, remove the sewing thread from all specimens. Partially separate the vinyl to vinyl bonds and the fabric to fabric/bonds at one end of each specimen by hand. Insert the loosened ends of each specimen 25 mm in the jaws of the mechanical tester. Pull specimens at
26、 a 180 peel angle at the rate of 305 mm/minute. 4.1.4 Waterproofness, min 675 kPa (ASTM D3393) No water leakage of the top material or bonded seam as received, after exposure in the Weathermeter (per para 3.6.1) for 750 hrs. and after exposure (on a separate specimen) in a mechanical convection oven
27、 at 121 +/- 2 C for 1 h. ENGINEERING MATERIAL SPECIFICATIONWSS-M8P20-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 6 4.1.5 Peel Adhesion of Bonded Decorative Areas As received, min 28 N Exposed, min 22 N Test Method: Separate various portions of the applie
28、d design by hand without the use of a solvent. Position the separated design section in the upper jaw, and the convertible top section in the lower jaw of a mechanical tester. Pull at a 180 angle at the rate of 305 mm/ minute. Exposure specimens for 750 hrs in the Weathermeter (per para 3.6.1). ENGI
29、NEERING MATERIAL SPECIFICATIONWSS-M8P20-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 6 MINIMUM SAMPLE REQUIREMENTS Table 1 Test Method Sample Size New Top Cover Material/Construction Approval Color ApprovalOnly Well Lining Material Reinforce-ment Material
30、 Binding 3.4.1 Resistance to Mildew and Staining 3/method X X X 3.4.2 Resistance to Wicking 3/direction X X 3.4.3 Cold Flexibility 3 X XXX3.4.4 Resistance to W Flex 3 X X X X 3.4.5 Resistance to Cleaning Agents 1/agent X X X X 3.4.6 Fluid Spotting Resistance 1/agent X X X window and all purpose clea
31、ner only. X 3.4.7 Soiling and Cleanability 1/condition X X X X 3.4.8 Heat Resistance 1 X X X X X 3.4.9 Environmental Cycling 1 X X X X X 3.5.1 Resistance to Scuffing-VINYL ONLY 3 X 3.5.2 Resistance to Abrasion-VINYL ONLY 3 X 3.5.3 Abrasion Resistance-Martindale-CLOTH ONLY 3 X 3.6.1 Exterior Accelera
32、ted Weathering Resistance 1 X X X 3.6.2 Interior Accelerated Weathering Resistance 1 X ASSEMBLY REQUIREMENTS: 4.1.1 Resistance to Heating 1 X 4.1.2 Shear Strength of Bonded Seam 3 X 4.1.3 Peel Strength of Bonded Seam 3 X 4.1.4 Water Permeability 3 X X NA NA 4.1.5 Peel Adhesion of Bonded Decorative Areas 3 X
