1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 06 29 N-STATUS Replaced by WSS-M98P12-B B. Haggart, NA 2000 10 25 Revised Updated A. Cockman 1998 04 28 Activated L. Koth Printed copies are uncontrolled Page 1 of 10 Copyright 2010, Ford Global Technol
2、ogies, Inc. STEERING WHEEL MATERIAL PERFORMANCE WSS-M98P12-A SPECIFICATION NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines the material performance requirements for the steering wheel “Class A“ material. It does not address leather wrap, switches, or internal materials; they are be
3、yond the scope of this specification and are addressed separately. All appropriate suppliers will be listed together as a system on the “Approved Source List” (e.g. the molder, substrate supplier and paint supplier will be recorded as a system). 2. APPLICATION This specification was originally relea
4、sed for materials used in the construction of steering wheels, which are molded in color to 90 % color match and in-mold painted (urethane), molded to 100 % color match with no paint (PVC), and combination wood/PVC wheels. 3. REQUIREMENTS Material specification requirements are to be used for initia
5、l qualification of materials. 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to the Companys Quality System Requirements. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms established for initial approval shall constitute the refere
6、nce standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on mater
7、ial conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 2 of 10 Copyright 2010, Ford Global Technologies, In
8、c. 3.4 APPEARANCE The color, gloss, pattern, and finish shall match the approved Ford Design Center master sample, or shall be as specified on the engineering drawing. The surface shall be free of pinholes, voids, or surface blemishes and blisters. The specific gloss reading must be identified on pl
9、aques and parts before testing begins. 3.5 TESTING TO BE PERFORMED ON MOLDED, PAINTED TEST SPECIMENS (For wood wheels: use flat production- representative test specimens) (No paint for wheels that are not painted in production) Molded test specimens shall be a min of 200 x 200 x 50 mm. Specimens mus
10、t be grained for tests defined in para 3.5.1. Graining is optional for tests defined in para 3.5.2. The grain pattern must be representative of the production design being considered for approval. The following tests shall be conducted on material cut from the above molded test specimens so that the
11、 total thickness of paint and substrate is 5.0 +/- 1.0 mm, unless otherwise noted in the test method. All colors must be tested - 3 specimens per color. Exceptions must be pre-approved by Ford Materials Engineering. Painted test specimens must have a film thickness representative of production. Gene
12、ral Acceptance Criteria: The surface shall show no evidence of tackiness or exhibit any type of general change in appearance such as staining, color change, fading, gloss change, loss of paint adhesion, flaking, chipping, blistering, checking, chalking, cracks, splits, sinks, bulges, peeling, or del
13、amination. 3.5.1 Testing to be performed on grained samples cut from molded test specimens (use flat production-representative test samples for wood wheels). 3.5.1.1 Soiling and Cleanability, min Rating 4 (FLTM BN 112-08/ISO 105-A02, AATCC Evaluation Procedure 1) 3.5.1.2 Resistance to Scuffing, min
14、1000 cycles (FLTM BN 108-04/SAE J365, scuff head “A“, 0.91 Kg load) Measure and report the paint film thickness of the test specimen. Run a min of 1000 cycles for every 25 micrometers of paint thickness. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 3 of 10 Copyright 2010, Ford Global Technol
15、ogies, Inc. No cracks in the finish transverse to the direction of motion. No wear through to expose the substrate. Shall be compatible with adjacent unscuffed area. 3.5.1.3 Abrasion Resistance, min 1000 cycles (FLTM BN 108-02/SAE J948, CS #10 wheels 500 g load) Measure and report the paint film thi
16、ckness of the test specimen. Run a min of 1000 cycles for every 25 micrometers of paint thickness. Abrader must not expose base substrate on test panel. Abraded area shall be compatible with adjacent unabraded area. 3.5.1.4 Thermal Shock Test for Paint (FLTM BI 107-05) Adhesion, min Rate and Report
17、3.5.2 Testing to be performed on samples cut from molded test specimens, grain optional (use flat production-representative test specimens for wood wheels). 3.5.2.1 Crocking, Wet, Dry, and Cleaners, min Rating 5 (FLTM BN 107-01, Procedure C, AATCC Evaluation Procedure 2) In addition to wet and dry c
18、rocking per the test method, evaluate the following cleaners using the procedure for wet crocking: All Purpose Cleaner Glass Cleaner with Ammonia Leather and Vinyl Cleaner IPA (50 % V/V. IPA and deionized water) 3.5.2.2 Migration Staining, min Rating 5 (FLTM BN 103-01/ISO 105 A-02, AATCC Evaluation
19、Procedure 2) The surface shall show no evidence of injurious exudation, adhesion (tackiness), separation, color transfer, or flattening or embossing, when placed face to face with itself or materials of the M2F177 series. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 4 of 10 Copyright 2010, F
20、ord Global Technologies, Inc. 3.5.2.3 Flammability (ISO 3795) Burn Rate, max 100 mm/ minute 3.5.2.4 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection. 3.6 TESTING
21、TO BE PERFORMED ON SPECIMENS TAKEN FROM PARTS All testing is to be performed on specimens taken from production-representative parts unless pre-approval is obtained from Ford Materials Engineering. All colors must be tested - 3 specimens per color. Exceptions must be pre-approved by Ford Materials E
22、ngineering. 3.6.1 Paint Film Thickness Requirements 20 - 45 (Painted wheels only) micrometer Test Method must be pre-approved by Ford Materials Engineering. Cross section evaluation under microscope is appropriate. Note: Paint film thickness is critical for performance. Supplier control plans must i
23、nclude a paint film thickness evaluation at regular intervals. Microscopic measurement technique of a component or thickness gage technique of the paint film are both acceptable. Paint viscosity must also be controlled. 3.6.2 Adhesion (Cross Hatch Test) (FLTM BI 106-01, Method D, replace plaques wit
24、h part) Adhesion shall be performed on the full wheel in the largest grained “flat“ area. Typically, this will be on the “back“ face of the wheel in the spoke area. Due to the contour of the part, substrate material may be removed when performing this test. This is not cause for rejection; adhesion
25、of the paint to the substrate material must be evaluated. Less than 5 % paint removal with no complete diamonds removed. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 5 of 10 Copyright 2010, Ford Global Technologies, Inc. 3.6.3 Water Resistance, (“X“ Test), min 96 h (FLTM BI 104-01, replace p
26、laques with specimen taken from the part) Specimen shall be cut from the steering wheel from the largest grained “flat“ area. Typically, this will be on the “back“ face of the wheel in the spoke area. Test Method: Immerse the test specimen for 96 h in distilled or deionized water maintained at 32 +/
27、- 2 C as described in FLTM BI 104-01. Remove specimen from the water and within 30 minutes, scribe an “X“ through the finish to the substrate. Dry the scribed area with a paper towel, cloth or air (oil and moisture free) and immediately apply with firm thumb pressure, a min of 1300 mm2 of 3M #898 ta
28、pe. Remove the tape by pulling one end at a 90 angle at moderate speed. . No blistering, softening, dulling, color change, or loss of adhesion. 3.6.4 Flexibility Required for substrates with a flexural modulus less than 450 MPa. Specimen shall be taken from the steering wheel rim as follows: cut alo
29、ng the parting lines in the 12:00 region and remove a sample of the material from the “front“ at least 100 mm in length. The material sample shall be cleanly removed from the metal support. The test specimen will be taken from this sample and must use the material along the parting line of the outer
30、 diameter. 3.6.4.1 Room Temperature (23 +/- 2 C) Test Method: Cut 13 x 100 mm sample from the specimen. Grasp sample firmly at each end, place over mandrel painted side up, and bend around mandrel 180 degrees min. Use a 25 mm diameter mandrel. No cracking of “Class A“ surface when bent over mandrel.
31、 3.6.4.2 Cold Temperature (- 30 +/- 2 C) Test Method: Cut 13 x 100 mm sample from the specimen. Place sample, mandrel and gloves into a freezer at - 30 +/- 2 C for 4 h min. Open freezer, put on gloves and grasp sample firmly at each end, place over mandrel painted side up, and bend around mandrel 18
32、0 min. Use a 25 mm mandrel. (A room temperature pair of gloves may be worn inside the gloves that have been conditioned at - 30 C.) No cracking of “Class A” surface when bent over mandrel. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 6 of 10 Copyright 2010, Ford Global Technologies, Inc. 3.6
33、.5 Perspiration Resistance, min 5 cycles (FLTM BI 113-03, replace plaques with Rating 4 specimen taken from the part, wait 1 h between cycles, AATCC Evaluation Procedure 1) Specimen shall be cut from the steering wheel from the largest grained “flat“ area. Typically, this will be on the “back“ face
34、of the wheel in the spoke area. No color change in excess of AATCC rating, no gloss change, softening, lifting, peeling, blistering or general change in appearance. 3.6.6 Resistance to Water and Soap Spotting, min Rating 4-5 (FLTM BI 113-01, replace plaques with specimen taken from the part, ISO 105
35、-A02/ AATCC Evaluation Procedure 1) Specimen shall be cut from the steering wheel from the largest grained “flat“ area. Typically, this will be on the “back“ face of the wheel in the spoke area. No softening. Must be evaluated within 1 h of conditioning. After the soap and water testing apply 0.25 m
36、l of window cleaner that contains at least 1 % butyl cellusolve on the test sample using a 19 mm I.D. O-ring made of Teflon. Expose the sample at 23 +/- 2 C and 50 +/- 5% R.H. for 1 h. No softening allowed. 3.6.7 Resistance to Chemicals, min Rating 4 (AATCC Evaluation Procedure 2) 1. M-14J148 Petrol
37、eum Naphtha 2. SAE 10 W 30 Motor Oil 3. IPA (50 % V/V. IPA and deionized water) Specimen shall be cut from the steering wheel from the largest grained “flat“ area. Typically, this will be on the “back“ face of the wheel in the spoke area. Test Method: Apply 2 to 5 ml of each chemical to separate are
38、as (do not allow mixing) of the part. Cover each spot with a watch glass to prevent evaporation. Expose for 1 h at 23 +/- 2 C. Remove watch glass and wipe with a soft white cloth. Thoroughly wash test area with soap and water and dry. Perform adhesion per (FLTM BI 106-01, Method D) on test area with
39、in 1 h. Requirement per para 3.6.2. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 7 of 10 Copyright 2010, Ford Global Technologies, Inc. 3.6.8 Resistance to Acid Spotting, min Rating 4 - 5 (FLTM BI 113-02, replace plaques with specimen taken from the part, AATCC Evaluation Procedure 1) Specim
40、en shall be cut from the steering wheel from the largest grained “flat“ area. Typically this will be on the “back“ face of the wheel in the spoke area. No softening. Must be evaluated within 1 h of conditioning. 3.6.9 Odor, max Rating 2 (SAE J1351, replace plaques with specimen taken from the part)
41、3.6.10 Suntan Lotion and Insect Repellent, max 24 C Rating 3 74 C Rating 3 The suntan lotion must have a SPF factor of at least 30, contain Ethylhexyl p-methoxycinnamate and must be water-proof. The insect repellent must have at least 20 % N, N diethyl-meta-toluamide. Place 0.25 ml of each solution
42、on the test sample using 19 mm I.D. O-rings made of Teflon. Expose the sample at the test temperature for 1 h. Immediately remove from test temperature and wipe off the solutions. Evaluate samples for visual effect and rate. Rating: 1. No visual effect. 2. Repairable with no visual effect. Repair mu
43、st meet the rest of the specification. 3. Spotting, discoloration. 4. Softening or slight dissolving of top layer. 5. Blistering/delamination. 6. Coating dissolved. ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 8 of 10 Copyright 2010, Ford Global Technologies, Inc. 3.7 TESTING TO BE PERFORMED
44、 ON PARTS Unless otherwise noted, all testing is to be performed on production-representative steering wheel assemblies. All colors must be tested - 2 assemblies per color. Exceptions must be pre-approved by Ford Materials Engineering. General Acceptance Criteria: Shall not shrink or expand to exten
45、t of causing unsightly wrinkles, pull outs, loss of surface grain or design features in any portion of the assembly. The material shall not lose adhesion or delaminate from the retainer in any area of material/retainer contact. The surface shall show no evidence of tackiness or exhibit any type of g
46、eneral change in appearance such as staining, color change, fading, gloss change, loss of paint adhesion, flaking, chipping, blistering, checking, chalking, cracks, splits, sinks, bulges, peeling, or delamination. 3.7.1 Long Term Heat Exposure, min Rating 4 (AATCC Evaluation Procedure 1) Test Method
47、: Expose the steering wheel assembly for 7 d at 107 +/- 3 C and examine for conditions noted above. One conditioned part shall be immersed in water for 24 h and tested for adhesion per para 3.6.3 (24 h immersion rather than 96 h). 3.7.2 Heat, Humidity and Cold Cycle Test, min Rating 4 (AATCC Evaluat
48、ion Procedure 1) Test Method: Expose the steering wheel assembly to 1 cycle of the following: 2 h at 82 +/- 2 C 1 h at 20 +/- 2 C 3 h at 45 +/- 2 C and 85 +/- 5 % R.H. 2 h at - 20 +/- 2 C 1 h at 0 +/- 2 C 4 h at - 40 +/- 2 C 1 h at 0 +/- 2 C 2 h at - 20 +/- 2 C 3 h at 45 +/- 2 C and 85 +/- 5 % R.H.
49、1 h at 20 +/- 2 C 4 h at 82 +/- 2 C 1 h at 20 +/- 2 C 3 h at 45 +/- 2 C and 85 % +/- 5 % R.H. 2 h at - 20 +/- 2 C 1 h at 0 +/- 2 C 2 h at - 40 +/- 2 C 1 h ramp time between each step. One conditioned part shall be immersed in water for 24 h and tested for adhesion per para 3.6.3 (24 h immersion rather than 96 h). ENGINEERING MATERIAL SPECIFICATION WSS-M98P12-A Page 9 of 10 Copyright 2010, Ford Global Technologies, Inc. 3.7.3 Weathering Requirements
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