1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1993-07-01 EP00E10258822000 Revised 3.5.8 K. Gerhards1993-02-01 EP00E10258804000 Released K. GerhardsWP 3948-a Page 1 of 6 POLYPHTHALAMIDE (PPA), 25 % GLASS FIBER WSK-M4D872-AREINFORCED MOLDING COMPOUND1. SCOPETh
2、e mate rial defined by this specification is a glass fiber reinforcedpolyphthalamide molding compound.2. APPLICATIONTh is specification was released originally for material used fortonneau-cover hook.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality Sy
3、stemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.1.1 All requirements of thi s specification
4、 identified by symbol(s), shall be met with data representing 3 sigma values.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and ther mogram establis
5、hed for initial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll
6、 test values indicat ed herein are based on material and specimenswith moisture content not exceeding 0.2 % (test according to ISO 960,Method B).All test materials imme diately after processing have to be sealed incontain ers that are impermeable to water vapor. If the moisturecontent exceeds 0.2 %,
7、 condition the material for a minimum of 16 hat 40 - 50 EC at a reduced pressure below 133 Pa.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D872-AWP 3948-b Page 2 of 6 3.4 MOLDING COMPOUND3.4.1 Glass Fiber Content 23 - 27 %(ISO 3451/4, 600 +/- 25 EC)(s) 3.4.2 Melt Temperature, min 288 - 297 EC(ISO 3146, M
8、ethod C, 10 EC/min heatingrate)3.5 MOLDED TEST SPECIMEN3.5.1 Preparation of Test SpecimensUnless otherwise specif ied all tests shall be carried out oninjection 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
9、10 x 4.0 +/- 0.2 mmSpeci mens with shorter dimensions shall be cut from thecenter portion of the test specimen A and/or B. The specimensshall be prepared according to ISO 294. No annea ling allowed.3.5.2 Density 1.33 - 1.39 g/cm(ISO 1183, Method A)(s) 3.5.3 Tensile Strength at Yield, min 150 MPa(ISO
10、 R 527, 150 minimum x 10 x 4.0 +/-0.2 mm specimen, 50 mm/min test speed, (s) 3.5.4 Flexural Modulus, min 6.5 GPa(ISO 178, 80 x 10 x 4.0 +/- 0.2 mmspecimen, 2 mm/min test speed, 64 mmsupport span)3.5.5 Shear Modulus at 23 EC 1.3 - 1.8 GPa(ASTM D 4065, forced constant amplitude,fixed frequency of 1 Hz
11、 +/- 15 %, strainlevel below 1 %. Specimen approx. 60 x10 x 4.0 +/- 0.2 mm cut from the centerof specimen A. Specimen length betweenclamps 35-40 mm. Soak time at eachtemperature interval - 3 minutes minimum)Additionally, a Shear M odulus versus Temperature curve shallbe plotted f or - 50 to + 280 EC
12、 temperature range, at 5 ECminimum intervals. The plotted curve must be wit hin tolerancerange shown on page 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 test)3.5.6.1 At 23 +/- 2 EC 5 kJ/mENGINEERING MATERIAL SPECIFICATIONWSK-M4D872-AWP
13、3948-b Page 3 of 6 3.5.6.2 At - 40 +/- 1 EC 4 kJ/mThe test specimens mu st be conditioned for minimumof 6 h at the above s pecified temperature prior toimpact test. Low temperature testing shall be donewithin the cold box.(s) 3.5.7 Heat Deflection Temperature, min(ISO 75, 120 x 10 x 4.0 +/- 0.2 mm s
14、pecimen, 0.32 +/- 0.01 mm deflection)3.5.7.1 At 1.80 MPa 240 EC3.5.7.2 At 0.45 MPa 250 EC3.5.8 Heat Aging Performance(ISO 188, except 150 +/- 50 air changes/h, 1000 h at 160 +/- 2 EC. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 EC. Unaged property va
15、lues shall be determined at the time of the aged properties determination)3.5.8.1 Tensile Strength at Max LoadChange +/- 25 %(Test Method per para 3.5.3)3.5.8.2 Impact Strength, Izod Change +/- 25 %(Test Method per para 3.5.6.1,specimens to be notched beforeheat aging)3.6 FOGGING(FLTM BO 116-03, 3 h
16、 at 100 EC)Fog Number, min 90Formation of clear film or droplets is cause for rejection.3.7 FLAMMABILITY(ISO 3795)Burn Rate, max 100 mm/minuteThe specimen size required for material approval is 355 x 100 x 1.0+/- 0.1 mm with a smooth surface.3.8 ADDITIONAL REQUIREMENTSSpecific requirements for mater
17、ial and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be clearly designated on the Engineeringdrawing.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D872-AWP 39
18、48-b Page 4 of 6 3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the
19、 materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written appro
20、val of the Materials Engineeringactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Speci
21、fication WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and M
22、aterials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of
23、this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for intended process and/or appl
24、ication. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information below is provided for clarification and assistance inmeeting the requirements to the specification.5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.7 - 3.5E-5/ EC(AST
25、M E 228 or TMA, temperature range - 30 - + 30 EC)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 EC 0.2 - 1.0 %ENGINEERING MATERIAL SPECIFICATIONWSK-M4D872-AWP 3948-b Page 5 of 6 5.2.2 Post Shrinkage(Separate s
26、pecimens required for each test). After 48 h at 80 EC 0.01 - 0.05 %. After 30 min at 120 EC 0.01 - 0.1 %5.3 WATER ABSORPTION 0.4 - 0.9 %(ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen)5.5 RECYCLING CODEPPA-GF25ENGINEERING MATERIAL SPECIFICATIONWSK-M4D872-AWP 3948-b Page 6 of 6
