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1、 ENGINEERING MATERIAL SPECIFICATION Material NameSpecification Number DateActionChanges 1992-06-01 EP00E10176270000 Released P. Kuntze WP 3948-aPage 1 of 8 POLYBUTYLENE TEREPHTHALATE (PBT), MODIFIED 20 % WSK-M4D753-A GLASS FIBER REINFORCED MOLDING COMPOUND, EXTERIOR 1.SCOPE The material defined by t
2、his specification is a 20 % glass fibre reinforced thermoplastic polyester molding compound based on polybutylene terephthalate (PBT) modified with polyethylene terephthalate (PET), UV stabilized for unpainted exterior applications. 2.APPLICATION This specification was released originally for materi
3、al used for outside doorhandle. 3.REQUIREMENTS 3.1STATISTICAL 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. Appropriate statistical tools must be used to anal
4、yze process/product data so that variation in the final product is continuously reduced. 3.2INFRARED 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 thermogr
5、ams established 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. 3.3CONDITIONING AND TEST
6、 CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 EC and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. -,-,- ENGINEERING MATERIAL SPECIFICATION
7、WSK-M4D753-A 3.4MOLDING COMPOUND 3.4.1Melt Flow Rate15 - 24 g/ (ISO 1133/ASTM D 1238, 260 EC, 2.16 kg)10 minutes The material shall be dried for 4 h minimum at 130 - 135 EC in a mechanical convection oven immediately preceding the test. 3.4.2Glass Fiber Content18 - 22 % (ISO 3451/2, test temperature
8、 750 +/- 25 EC, test portion 2.5 - 3.0 g) 3.5MOLDED TEST SPECIMEN 3.5.1Preparation 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 3
9、167) B. 120 x 10 x 4.0 +/- 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. 3.5.2Density1.44 - 1.50 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3Tensile
10、Strength at Max Load, min108 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4Flexural Modulus, min5.0 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the loadin
11、g nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5Shear Modulus at 23 EC1.3 - 1.9 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 specimen A. Specimen length between c
12、lamps 35 - 40 mm soak time at each temperature interval: 3 minutes minimum) ENGINEERING MATERIAL SPECIFICATION WSK-M4D753-A WP 3948-bPage 3 of 8 Additionally, a Shear Modulus vs. Temperature curve shall be plotted for - 50 to + 220 EC temperature range, at 5 EC minimum intervals. The plotted curve m
13、ust be within tolerance range shown on page 7. 3.5.6Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1At 23 +/- 2 EC5.5 kJ/m2 3.5.6.2At - 40 +/- 2 EC5.5 kJ/m2 The test specimens must be conditioned for minimum of
14、 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7Heat Deflection Temperature, min185 EC (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard def
15、lection of 0.32 +/- 0.01 mm. At 1.82 MPa) 3.5.8Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 170 +/- 2 EC. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1Tensile Strength Change- 25 % (Test Method per para 3.5.3)
16、3.5.8.2Impact Strength, Izod Change- 20 % (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6FLAMMABILITY (ISO 3795) Burn Rate, max100 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
17、SPECIFICATION WSK-M4D753-A WP 3948-bPage 4 of 8 3.7WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2 and 3.8.3, the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, cra
18、zing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by polishing with Ford car polish (auto wax) at permission of the affected Product Development Materials Activity. All initial approvals will be based on the preliminary
19、Weatherometer exposure, pending Florida exposure results for final approval. 3.7.1Xenon Arc WeatherometerRating 4 (SAE J1960, 1580 kJ/m2 exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.212 months Florida Rating 4 (FLTM BI 160-01, 5 sou
20、th, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.324 months Florida Rating tbd (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold)
21、3.8ADDITIONAL REQUIREMENTS Specific requirements for material and/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
22、 drawing. 3.9SUPPLIERS 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, processing or labeling of the mater
23、ial 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 obtain the written approval
24、of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. ENGINEERING MATERIAL SPECIFICATION WSK-M4D753-A WP 3948-bPage 5 of 8 Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this
25、 document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. 4.APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the resp
26、onsible 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 submit to the affected Materials Engineering activity a comple
27、ted 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 material designation and code number, and test specimens for Ford
28、 evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5.GENERAL INFORMATI
29、ON The information below is provided for clarification and assistance in meeting the requirements to the specification. 5.1COEFFICIENT OF LINEAR THERMAL EXPANSION2.5 - 4E-5/ C (ASTM D 696) 5.2MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1Molding Shrinka
30、ge . After 48 h at 23 +/- 2 EC In Flow Direction0.25 - 0.50 % Transverse to Flow Direction1.30 - 1.60 % 5.2.2Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 EC0.05 % . After 30 min at 120 EC0.1 % -,-,- ENGINEERING MATERIAL SPECIFICATION WSK-M4D753-A WP 3948-bPage 6 of 8
31、 5.3MELT VOLUME RATE12-20 cm3/10 min (ISO 1133/ASTM D 1238, 260 EC, 2.16 kg) The material shall be dried for min of 4 h at 130 - 135 EC in a mechanical convection oven immediately preceding the test. 5.4HEAT DEFLECTION TEMPERATURE, min 210 EC (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) 5.5MELT TEMPERATURE 220 - 226 EC (ISO 1218, Method B/ASTM D 789) -,-,- ENGINEERING MATERIAL SPECIFICATION WSK-M4D753-A WP 3948-bPage 7 of 8 5.6RECYCLING CODE SAE or PBT-GF20 OPTIONAL PBTGF20 -,-,- ENGINEERING MATERIAL SPECIFICATION WSK-M4D753-A WP 3948-bPage 8 of 8