1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2010 11 16 N-STATUS No replacement named A. Pan, APA 1996 09 20 Activated M. Trapp WP 3948-a Page 1 of 6 POLYETHYLENE TEREPHTHALATE (PET), 35 % GLASS WSS-M4D766-A2 FIBER REINFORCED MOLDING COMPOUND, 100 % RECY
2、CLED CONTENT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 35 % glass fiber reinforced thermoplastic high temperature molding compound based on polyethylene terephthalate (PET) that is 100 % post consumer recycled. 2. APPLICATION This specification was releas
3、ed originally for material used for glove box latch housing. 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 Contro
4、l Plan for ongoing 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
5、 assure consistent 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, ident
6、ified by symbol (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
7、 for initial approval 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-
8、M4D766-A2 WP 3948-b Page 2 of 6 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 otherw
9、ise specified. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 6.0 - 14.4 g/10 minutes (ISO 1133, 250 C, 2.16 kg) The material shall be dried for 4 h minimum at 175 C +/- 2 C in a mechanical convection oven immediately preceding the test. (s) 3.4.2 Filler Content 30 - 38 % (ISO 3451-2, Method A) (s) 3
10、.4.3 Melt Temperature, min 256 C (ISO 3146, Method C, 10 C/min heating rate) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions are required: A. 150 minimum
11、x 10 x 4.0 +/- 0.2 mm (ISO 3167, Type 1A) B. 60 x 60 x 2.0 +/- 0.1 mm (ISO/DIS 294-3) C. 355 x 100 x 1.0 +/-0.1 mm (ISO 3795) Test specimen A shall be molded using molding conditions defined in ISO 294. Specimens with shorter dimensions shall be cut from the center of the specimen A. No annealing al
12、lowed. 3.5.2 Density 1.49 - 1.72 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 87 MPa (ISO 527-1 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 50 mm/minute or 5 mm/minute) (s) 3.5.4 Flexural Modulus, min 6.6 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specim
13、en use center section of specimen A, 2 mm/min test speed, 64 mm support span) ENGINEERING MATERIAL SPECIFICATION WSS-M4D766-A2 WP 3948-b Page 3 of 6 3.5.5 Shear Modulus at 23 C 1.65 - 2.88 GPa (ASTM D 5279, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen
14、 approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes minimum) Additionally, a shear modulus versus temperature curve shall be plotted for - 50 to + 250 C temperature range, at 5 C minimum in
15、tervals. The plotted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. (s) 3.5.6 Impac
16、t Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 2.6 kJ/m23.5.6.2 At - 40 +/- 1 C 3.2 kJ/m2The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to
17、impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. (s) 3.5.7 Heat Deflection Temperature, min tbd C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, flatwise, 0.34
18、+/- 0.1 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 60 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Max Load Change +/- 25 % 3.5.9.2 Impact Strength,
19、 Izod Change +/- 25 % (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSS-M4D766-A2 WP 3948-b Page 4 of 6 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 90 Formation of clear f
20、ilm, droplets or crystals is cause for rejection. 3.7 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 (use specimen C) with a smooth surface. 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material an
21、d/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to
22、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, processing or labeling of the material originally approved under this specification, whether or not
23、 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 obtain the written approval of the Materials Engineering activity. Test data, test samples a
24、nd 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 in Engineering Materials Specification WSS-M99P9999-A1. ENGINEERING MATERIAL SPECIFICATION WS
25、S-M4D766-A2 WP 3948-b Page 5 of 6 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 affected Purchasing, Des
26、ign 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 compliance with all the requi
27、rements 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 suitability for intended process
28、es and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION
29、 1.97E-5/C (ASTM E 831 TMA, temperature range - 30 to + 30 C) 5.2 MOLD SHRINKAGE (ISO/DIS 294-3, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C Flow Direction 0.06 % Transverse Direction 0.16 % 5.2.2 Post Shrinkage (Separate specimens required
30、for each test) . After 48 h at 80 C 0.02 % . After 30 minutes at 120 C 0.07 % 5.3 MELT VOLUME RATE 11.4 cm3/10 minutes (ISO 1133, 200 C, 2.2 kg, extrudate volume in cm3/10 minutes) 5.4 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PET-GF35 ENGINEERING MATERIAL SPECIFICATION WSS-M4D766-A2 WP 3948-b Page 6 of 6 ENGINEERING MATERIAL SPECIFICATION WSS-M4D766-A2 WP 3948-b Page 7 of 6
