1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 11 16 N-STATUS No replacement named A. Pan, APA 1996 10 02 Activated S. DeGrood WP 3948-a Page 1 of 5 POLYETHYLENE TEREPHTHALATE (PET), 15 % GLASS WSS-M4D937-A2 FIBER REINFORCED MOLDING COMPOUND, 100 % RE
2、CYCLED POLYMER NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 15 % glass fiber reinforced thermoplastic molding compound based on 100 % recycled polyethylene terephthalate from post consumer sources. 2. APPLICATION This specification was released originally fo
3、r material used for audio speaker brackets. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qualification of materials. A Control Plan for ongoin
4、g production verification is required. This plan must be reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to analyze process/product data and assure consisten
5、t processing of the materials. Part producers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. 3.1.1 All requirements of this specification, identified by symbol (
6、s), shall be met with data representing 3 sigma values. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial appr
7、oval shall constitute the reference 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. ENGINEERING MATERIAL SPECIFICATION WSS-M4D937-A2 WP 3948
8、-b Page 2 of 5 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material 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. 3.
9、4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate, max 15 g/10 minutes (ISO 1133, 280 C, 2.16 kg) (s) 3.4.2 Filler Content 13.4 - 18.5 % (ISO 3451/2, 1 h at 750 +/- 50 C, test portion 2.5 - 3.0 g, glass fiber/mica filler) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specif
10、ied all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specime
11、n A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.41 - 1.45 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 95 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.5.4 Flexural Modulus, mi
12、n 5.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.35 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of spe
13、cimen A. Specimen length between clamps 35-40 mm. Soak time at each temperature interval - 3 minutes minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 240 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown o
14、n page 6. ENGINEERING MATERIAL SPECIFICATION WSS-M4D937-A2 WP 3948-b Page 3 of 5 (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 5.1 kJ/m 3.5.6.2 At - 40 +/- 2 C 5.0 kJ/m The test specimens must be conditioned for
15、 minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold box. (s) 3.5.7 Heat Deflection Temperature, min 169 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Perfo
16、rmance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength at Max Load Change +/- 25 % (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25 % (Test
17、Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate
18、, post test conditioning 1 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection. 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or perfor
19、mance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. ENGINEERING MATERIAL SPECIFICATION WSS-M4D937-A2 WP 3948-b Page 4 of 5 3.8.1 Regrind 20 % maximum of regrind produced from molded parts is acceptable, providing all requir
20、ements of this specification are met. 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, proces
21、sing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changes and
22、 obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined
23、in Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the af
24、fected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full complia
25、nce with all the requirements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitabilit
26、y for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT
27、 OF LINEAR THERMAL EXPANSION (ASTM E 831 TMA, temperature range 30 to + 30 C) Flow: 3.24E-5/ C +/- 0.04 Cross Flow: 7.90E-5/ C +/- 0.10 ENGINEERING MATERIAL SPECIFICATION WSS-M4D937-A2 WP 3948-b Page 5 of 5 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5
28、.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.50 % 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.0 % . After 30 min at 120 C 0.0 % 5.3 MELT TEMPERATURE 235 C (ISO 3146, Method C, 10 C/min heating rate) 5.4 HEAT DEFLECTION TEMPERATURE 214 C (ISO 75, 120
29、 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) 5.5 MODULUS OF ELASTICITY TBD GPa (ISO 527-1 and ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 1 mm/minute) 5.6 IMPACT STRENGTH, CHARPY (ISO 179/1eA, 80 x 10 x 4.0 +/- 0.2 mm specimen use center
30、 section of specimen A, 10 specimens for each test) 5.6.1 At 23 +/- 2 C TBD kJ/m 5.6.2 At - 40 +/- 1 C TBD kJ/m 5.6.3 At - ( ) +/- 2 C TBD kJ/m The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 5.7 RECYCLING CODE PET-GF15
