1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Released 2010 01 25 N-STATUS No replacement named J. Crist, NA 1994 02 28 NGA1E10370437002 Released C.C. Gray WP 3948-a Page 1 of 6 POLYETHYLENE TEREPHTHALATE (PET) WSH-M4D888-A1 45 % GLASS FIBER REINFORCED MOLDI
2、NG COMPOUND 100 % RECYCLED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyester molding compound based on 100 % post consumer recycled polyethylene terephthalate (PET) reinforced with glass fibers. 2. APPLICATION This specification was releas
3、ed originally for material used for air conditioning housing inlet door. 3. REQUIREMENTS 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropr
4、iate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMA
5、L 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 approval shall constitute the reference standard and shall be kept on file at the designated material la
6、boratory. 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 material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/-
7、5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. ENGINEERING MATERIAL SPECIFICATION WSH-M4D888-A1 WP 3948-b Page 2 of 6 3.4 MOLDING COMPOUND (s) 3.4.1 Glass Fiber Content 43 - 47 % (ISO 3451/2, at 750 +/- 50 C, test portio
8、n 2.5 - 3.0 g) 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 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/
9、- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.65 - 1.75 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 145 MPa (ISO R
10、527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.5.4 Flexural Modulus, min 12.0 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 1.25 - 1.88 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of
11、 1 Hz +/- 15 %, strain level below 1 %. Specimen 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 t
12、o + 250 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. ENGINEERING MATERIAL SPECIFICATION WSH-M4D888-A1 WP 3948-b Page 3 of 6 (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 t
13、est) 3.5.6.1 At 23 +/- 2 C 8.0 kJ/m 3.5.6.2 At - 40 +/- 1 C 7.0 kJ/m The test specimens must be conditioned for 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 225 C (ISO 75,
14、 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Max L
15、oad Change +/- 25 % (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 25 % (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 95 Formation of a clear film, droplets or crystals is cause for rejectio
16、n. 3.7 FLAMMABILITY (ISO 3795) 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. ENGINEERING MATERIAL SPECIFICATION WSH-M4D888-A1 WP 3948-b Page 4 of 6 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/
17、or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. 3.9 SUPPLIERS RESPONSIBILITY All materials supplied to t
18、his 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
19、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 an
20、d 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 Material Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defi
21、ned 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, Design and Materials Engineering activity. Upon request, the Supplier shall
22、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 requirements of this specification (test results, not nominal values), the mat
23、erial 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 and/or application. Upon approval, the material will be added to the Eng
24、ineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATION WSH-M4D888-A1 WP 3948-b Page 5 of 6 5. GENERAL INFORMATION The information below is provided for clarification and assistance in meeting the requirements to the specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8E-5/
25、 C (ASTM E 228 or TMA, temperature range - 30 to + 30 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.4 - 0.8 % 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.
26、05 - 0.1 % . After 30 min at 120 C 0.05 - 0.1 % 5.3 MELT TEMPERATURE 247 - 257 C (ISO 3146, Method C, 10 C/min heating rate) 5.4 HEAT DEFLECTION TEMPERATURE, min 255 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) 5.4 RECYCLING CODE PET-GF45 ENGINEERING MATERIAL SPECIFICATION WSH-M4D888-A1 WP 3948-b Page 6 of 6
