1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 12 06 Activated A. Wedepohl/J. Crist Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 7 SPLIT GRAIN LEATHER, GENUINE, FINISHED, STEERING WSS-M1F21-C WHEEL, CONSOLE, SHIFT KNOBS AND BOOTS TOP GRAIN LE
2、ATHER, GENUINE, FINISHED, STEERING WSS-M1F22-C WHEEL, CONSOLE, SHIFT KNOBS AND BOOTS 1. SCOPE The material defined by these specifications is tanned top grain or split leather made from steer hides. The finish coating shall be a series of pigmented or clear resins to ensure compliance to all require
3、ments of these specifications. 2. APPLICATION These specifications were released originally for split or top grain leather for hand wrapped steering wheels, shift knobs, and shift boots. 3. REQUIREMENTS For all test methods, no individual measurement shall fall below the minimum values specified her
4、ein. In the event of an issue with a test result, testing on the finished part shall prevail. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 SAMPLE SELECTION Sa
5、mples should be prepared for testing according to ASTM D 1610. 3.3 APPEARANCE The color, grain, visual aesthetics, hand and finish shall be approved by Ford Design/Mastering. Hides shall not exhibit defects or surface blemishes affecting the appearance approval of the material. 3.4 FINISHING Dyed le
6、ather with multiple finish coatings applied. The leather must be through dyed to prevent undyed fibers from showing through after sewing and the dye must be similar in color to the surface coating. No correcting or repair of any kind shall be allowed including but not limited to buffing, filling, or
7、 stuccoing. ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS-M1F22-C Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 7 3.5 LOT CERTIFICATION Each lot of finished hides is required to be inspected and certified by the finisher to the requirements listed in the
8、 control plan. In addition to the finishers requirements, each lot shall be tested to the Wear Rubbing requirement, in the original condition and the results available to Ford Engineering upon request. 3.6 PHYSICAL PROPERTIES 3.6.1 Thickness, range 0.9 - 1.4 mm (ASTM D 1813) 3.6.2 Breaking Strength,
9、 min 800 N (ASTM D 2208) 3.6.3 Elongation at break 20 - 60% (ASTM D 2208) 3.6.4 Tear Strength (Trapezoid), min (ASTM D 5733) Any direction 100 N 3.6.5 Softness (FLTM BN 157-01, ST300 Softness Tester, 2.0 5.0 using a 25 mm diameter aperture.) 3.6.6 Shrinkage, max. 10% (FLTM BN 105-03, except heat cyc
10、le at 100 +/- 2 C, 3 cycles. Report all measurements.) 3.7 COLOR PROPERTIES General Acceptance Criteria: The material shall not exhibit any change in appearance such as color change, fading or gloss change in excess of the required AATCC rating. In addition, the material shall not exhibit staining,
11、blistering, loss of paint adhesion, flaking, chipping, checking, chalking, cracks, splits, sinks, bulges, tackiness, peeling or delamination. 3.7.1 Resistance to Fade, min (Filtered Xenon per FLTM BO 116-01, ISO 105-A02/AATCC Evaluation Procedure 1) 942 kJ/m2Rating 4 - 5 3224 kJ/m2Rating 4 In additi
12、on, the material must remain flexible and exhibit no cracking when bent around a 6.4 mm mandrel. ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS-M1F22-C Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 7 3.7.2 Resistance to Heat Aging, min Rating 4 (7 days at
13、 107 +/- 2 C, ISO 105-A02/ AATCC Evaluation Procedure 1) 3.7.3 Soiling and Cleanability, min Rating 4 (FLTM BN 112-08, ISO 105-A02/ AATCC Evaluation Procedure 1) Test only grease, coffee, and ketchup. 3.8 FINISH PROPERTIES 3.8.1 Coating Adhesion No top coat removal Test Method: Using a knife, cut an
14、 “X“ approximately 25 mm wide down to the base coat of sample. Apply acetate fiber tape (3M #898, 25 mm wide, or equivalent) over the “X“. Rub the tape until good contact has been achieved. Grip one end of the tape and with a quick steady pull remove the tape off the face of the sample. 3.8.2 Resist
15、ance to Crocking, Wet, Dry, and Cleaners, min (FLTM BN 107-01, ISO 105-A03/AATCC Evaluation Procedure 2) 1) Wet Rating 5 2) Dry Rating 5 3) Motorcraft All Purpose Cleaner Rating 4 4) Glass Cleaner Rating 4 (Any retail brand) 5) Motorcraft Leather Rating 4 and Vinyl Cleaner 6) Isopropyl alcohol Ratin
16、g 4 (50% v/v.IPA and DI water) 3.8.3 Resistance to Migration Staining (FLTM BN 103-01) The surface shall show no evidence of injurious exudation, adhesion (tackiness), separation or color transfer when placed against the standard vinyl test material. ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS
17、-M1F22-C Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 7 3.8.4 Perspiration Staining, min Rating 4 (FLTM BI 113-07, ISO 105-A02/ AATCC Evaluation Procedure 1) 1) Sample as received 2) Heat Aged Sample Expose the sample to 107 C for 7 days prior to perspirati
18、on exposure. 3) Faded Sample Expose the sample to 942 kJ/m2prior to perspiration exposure. After test, the finish shall show no evidence of softening, lifting, or peeling when rubbed with a fingernail or paperclip. 3.8.5 Resistance to Chemicals, min Rating 4 (ISO 105-A02/AATCC Evaluation Procedure 1
19、) 1) Petroleum Naptha 2) SAE 10 W 30 Motor Oil 3) Isopropyl alcohol (50% v/v. IPA and deionized water) Test Method: Apply 2 to 5 ml of each chemical to separate areas of the leather. (Do not allow mixing.) Cover each spot with a watch glass to prevent evaporation. Expose for 1 h at 23 +/- 2 C. Remov
20、e watch glass and wipe with a soft white cloth. Thoroughly wash test area with soap and water and dry. 3.8.6 Sunscreen Lotion and Insect Repellent, min Rating 3 (FLTM BI 113-08, Method B, ISO 105-A02/ AATCC Evaluation Procedure 1) 1) Sample as received at 24 C and 74 C. 2) Heat Aged Sample Expose th
21、e sample to 107 C for 7 days prior to sunscreen lotion and insect repellent. Test at 24 C and 74 C. 3) Faded Sample Expose the sample to 942 kJ/m2prior to sunscreen lotion and insect repellent. Test at 24 C and 74 C. 3.8.7 Abrasion Resistance- Taber Abrader, min Rating 6 (SAE J948, H-18 wheel, 500 g
22、 load, 500 cycles S-36 specimen mounting card) The surface shall show no evidence of wear through and the color of the abraded area shall be acceptable in appearance according to the Attribute Rating System. ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS-M1F22-C Printed copies are uncontrolled Co
23、pyright 2006, Ford Global Technologies, LLC Page 5 of 7 3.8.8 Resistance to Scuffing Rating 9 (SAE J365, A head, 0.9 kg, S-36 specimen mounting card, 1000 cycles) The surface shall show no evidence of wear through or cracking and the color of the scuffed area shall be acceptable in appearance accord
24、ing to the Attribute Rating System. 3.8.9 Wear Rubbing, min Rating 9 (1,500 reciprocating strokes) The surface shall not show evidence of wear and the rubbed area shall be rated very good in appearance according to the Attribute Rating System. 1) Original 2) After Environmental aging (7 days at 70 C
25、 +/- 2 C and 95% +/- 5% RH) Test Method: 1. Soak a length of 44.5 +/- 2 mm wide duck cloth in water until saturated. Use #10 cotton duck cloth, style 426-ACT. 2. Condition a 76 x 76 mm sample of material for 10 minutes in 55 C +/- 1 C water. Remove and secure onto a 25.4 mm diameter dowel. The sampl
26、e may be held in place by clamps. The material should be held taught and stationary during the test. 3. Position the cloth so it covers 180 of the sample without touching the seam. Weight the free end of the cloth with a 1.36 +/- 0.05 kg (3 lb) mass and attach the other end to the reciprocating mach
27、ine. 4. Ensure a smooth stroke with a length of 95 +/- 2 mm. One rise and fall of the weight equals one reciprocating stroke. The test shall run at 50 +/- 2 reciprocating strokes per minute. 5. Run the test for 1,500 reciprocating strokes at an ambient air temperature of 21 +/-3 C. 6. Keep the cloth
28、 saturated with room temperature water to prevent the sample from overheating and to maintain a constant coefficient of friction. 7. Record the number of cycles when wear becomes apparent. Suggest checking every 500 cycles. 8. Test a total of 3 samples using a new cloth for each sample. The duck clo
29、th can be obtained at www.TestF. 3.8.10 Cold Flexibility, min -35 C (SAE J323, Method A) The material must remain flexible and be without cracks after bending 180 around the mandrel. ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS-M1F22-C Printed copies are uncontrolled Copyright 2006, Ford Global
30、 Technologies, LLC Page 6 of 7 3.8.11 “W“ Flex Requirements, min (FLTM BN 102-02) For shift boot applications only. Fine cracks through the finish coating are acceptable, provided there is no evidence of finish peeling or roll back visible without the use of magnification. 1) 60,000 cycles, original
31、 condition 2) 30,000 cycles, after Fade Resistance 435 kJ/m23) 30,000 cycles, after 7 days at 107 +/- 2 C 3.8.12 Odor, max Rating 2 (FLTM BO 131-01) 3.8.13 Fogging Method A: Photometric Procedure (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1h and 16 h) Fog Number, mi
32、n 70 If oily droplets, crystals or clear film are present and the fog number is greater than 70, sample must be retested to Method B. If the fog number is less than 70, the material is rejected. Method B: Gravimetric Procedure (SAE J1756, 16 h at 100 C heating, 21 C cooling plate, post test conditio
33、ning, 4 h) Weight of Condensate, max 5 mg 3.8.14 Flammability (ISO 3795/SAE J369) Burn Rate, max 100 mm minute ENGINEERING MATERIAL SPECIFICATIONWSS-M1F21-C WSS-M1F22-C Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 7 of 7 4. ATTRIBUTE RATING SYSTEM Engineering Ra
34、ting Index 1 2 3 4 5 6 7 8 9 10 Evaluation of Attribute Performance Not Acceptable Poor Border- line Acceptable Fair Good Very Good Excellent Customer Satisfaction (for the attribute) Very Dissatisfied Some what dissatisfied Fairly Well Satisfied Very Satisfied Completely Satisfied Improvement Desir
35、ed by All Customers Average Customer Critical Customer Trained Observer Not Perceptible Rating Tips 1. Ratings should reflect critical customer expectations. 2. Customer expectations may vary due to specific market class, segment or model. 3. Ratings are restricted to your observations made during the evaluation. 4. It is acceptable not to rate an attribute due to insufficient evaluation time. 5. Do not guess or lower your ratings due to insufficient evaluation time.
