1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1996 02 27 Revised Updated and Revised para 3.5.51993-03-01 EP00E10258809000 Released P. KuntzeWP 3948-a Page 1 of 6 POLYBUTYLENE TEREPHTHALATE (PBT) 30 % GLASS WSK-M4D725-AFIBER REINFORCED MOLDING COMPOUND1. SCO
2、PEThe material defined by this specification is a 30 % gla ss fibre reinforcedther moplastic polyester molding compound based on polybutyleneterephthalate (PBT).2. APPLICATIONThis specifi cation was released originally for material used for electrical connectors.3. REQUIREMENTS3.1 QUALITY SYSTEM REQ
3、UIREMENTSMaterial suppliers and part producers must conform to Quality SystemRequirements, QS-9000. Material specification r equirements are to beused fo r initial qualification of materials. A Control Plan forong oing production verification is required. This plan must bereviewed and approved b y t
4、he relevant Ford Materials activity and/orFor d Supplier Technical Assistance (STA) prior to production partssubmission. Appropriate statistical tools must be used to analyzepr ocess/product data and assure consistent processing of thematerials.Part producers using this material in their products, m
5、ust use Fordapproved materials and must conform to a process control plan whichhas been approved by STA and/or the relevant Materials Activity.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts suppl
6、ied to this specification.The IR spectra and thermograms established for i nitial 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 teste
7、dunder the same conditions.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D725-AWP 3948-b Page 2 of 6 3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior
8、 to testing and tested under thesame conditions unless otherwise specified.3.4 MOLDING COMPOUND3.4.1 Melt Flow Rate 15 - 28 g/10 minutes(ISO 1133/ASTM D 1238, 260 C, 2.16 kg)The material shall be dried for 4 h minimum at 1 30 - 135 C ina mechanical convection oven immediately preceding the test.3.4.
9、2 Glass Fiber Content 28 - 32 %(ISO 3451/2, test temperature750 +/- 25 C, test portion 2.5 - 3.0 g)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 requir
10、ed:A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167)B. 120 x 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 1.50 - 1.56 g/cm3(IS
11、O 1183, Method A/ ASTM D 792,Method A1)3.5.3 Tensile Strength at Max Load, min 125 MPa(ISO R 527/ASTM D 638M, 150 min x 10x 4.0 +/- 0.2 mm specimen, 5 mm/minutetest speed)3.5.4 Flexural Modulus, min 7.5 GPa(ISO 178/ASTM D 790 M, Method IProcedure A, 80 x 10 x 4.0 +/- 0.2 mmspecimen, 2 mm/min test sp
12、eed, 64 mmsupport span, the radius of the loadingnose 5.0 +/- 0.1 mm and of the supports2.0 +/- 0.2 mm)ENGINEERING MATERIAL SPECIFICATIONWSK-M4D725-AWP 3948-b Page 3 of 6 3.5.5 Shear Modulus at 23 C 1.4 - 2.0 GPa(ASTM D 4065, forced constant amplitude,fixed frequency of 1 Hz +/- 15 %, strainlevel be
13、low 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 for - 50 to + 220 C temperature range, at 5
14、Cminimum intervals. The plotted curve must be wit hin tolerancerange shown on page 7.3.5.6 Impact Strength, Izod, min(ISO 180, Method A/ASTM D 256, Method A80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test)3.5.6.1 At 23 +/- 2 C 7 kJ/m23.5.6.2 At - 40 +/- 1 C 6.5 kJ/m2The test specimens m
15、u 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.3.5.7 Heat Deflection Temperature, min 200 C(ISO 75/ASTM D 648, 120 x 10 x 4.0+/- 0.2 mm specimen, at standarddeflection of 0.32 +/- 0.01 mm.At 1.80
16、 MPa)3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 150 +/- 50 airchanges/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination)3.5.8.1 Tensile Strength at Change +/- 15 %(Test Method per para 3.5.3)3.5.8.2 Impact Strength, Izod Chang
17、e +/- 20 %(Test Method per para 3.5.6.1,specimens to be notched beforeheat aging)3.6 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.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D725-AWP 3948-b Page 4 of
18、 6 3.7 FOGGING(FLTM BO 116-03, 3 h at 100 C)Fog Number, min 95Formati on of excessive amounts clear film or droplets is cause forrejection.3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specifi
19、cationand/or performance specification. All critical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval waso
20、riginally granted.Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequir ements, the Supplier shall
21、notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval 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,
22、regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppl
23、iers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, sign
24、ed by aqualified and authorized representative of the test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amat
25、eri al will be based on its performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.ENGINEERING MATERIAL SPECIFICATIONWSK-M4D725-AWP 3948-b Page 5 of 6 5
26、. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 3E-5/ 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
27、+/- 0.2 mminjection molded specimen)5.2.1 Molding Shrinkage. After 48 h at 23 +/- 2 C 0.4 - 0.6 %5.2.2 Post Shrinkage(Separate specimens required foreach test). After 48 h at 80 C 0.05 %. After 30 min at 120 C 0.09 %5.3 MELT VOLUME RATE 12 - 22 cm3/10 minutes(ISO 1133/astm d 1238, 260 C, 2.16 kg)The
28、 material shall be dried for 4 h minimum at 130 - 135 C in amechanical convection oven immediately preceding the test.5.4 HEAT DEFLECTION TEMPERATURE, min 220 C(ISO 75/ASTM D 648, 120 x 10 x 4.0 +/-0.2 mm specimen, at standard deflectionof 0.32 +/0 0.01 mm. At 0.45 MPa)5.5 MELT TEMPERATURE, min 222 C(ISO 3146, Method C, 10 C/min heating rate)5.5 RECYCLING CODEPBT-GF30ENGINEERING MATERIAL SPECIFICATIONWSK-M4D725-AWP 3948-b Page 6 of 6 T.B.E.
