1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2000 02 02 Activated M. A. Myers Page 1 of 7 POLYPROPYLENE (PP) HOMOPOLYMER, 20 % TALC WSS - M4D729 - A4 FILLED, INJECTION MOLDING COMPOUND, EXTERIOR 1. SCOPE The material defined by this specification is a
2、thermoplastic polypropylene homopolymer injection molding compound with 20 % talc filler, UV stabilized for exterior trim items. 2. APPLICATION This specification was originally released for material used for exterior headlamp surrounds. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppl
3、iers and part producers must conform to Quality System Requirements, QS - 9000. Material specification requirements are to be used for initial qualification of materials. A Control Plan for ongoing production verification is required. This plan must be reviewed and approved by the relevant Ford Mate
4、rials 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 assure consistent processing of the materials. Part producers using this material in their products, must use Ford appro
5、ved 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 , identified by symbol ( s), shall be met with data representing 3 sigma values. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL
6、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 labo
7、ratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard wh en tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 Page 2 of 7 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material
8、conditioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ - 5 % relative humidity for not less than 24 hours prior to testing and tested under the same conditions unless otherwise specified. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 3 - 11 g/ (ISO 1133, 230 C, 2.16 kg) 10 minutes (s) 3.4.2
9、 Filler Content 17 - 23 % (ISO 3451 - 1, Method A) 3.5 MOLD ED 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 (ISO
10、 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 1873 - 2. Specimens with shorter dimensions shall be cut from the center of the specimen A. No annealing allowed. 3.5.2 Den
11、sity 1.03 - 1.10 (ISO 1183, Method A) g/cm3 (s) 3.5.3 Tensile Strength at Yield, min 29 MPa (ISO 527 - 1 and ISO 527 - 2, 150 min x 10 X 4.0 +/ - 0.2 mm specimen, test speed: 50 mm/minute) (s) 3.5.4 Flexural Modulus, min 2.4 GPa (ISO 178, 80 x 10 x 4.0 +/ - 0.2 mm specimen use center section of spec
12、imen A, 2 mm/ minute test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 900 - 1300 MPa (ASTM D 4065, forced const ant amplitude, fixed frequency of 1 Hz +/ - 15 %, strain level below 1 %. Specimens approximately 60 x 10 x 4.0 +/ - 0.2 mm cut from the center of specimen A. Specimen length be
13、tween clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes min) ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 Page 3 of 7 Additionally, a shear modulus versus temperature curve shall be plotted for - 50 to + 140 C temperature range, at 5 C min intervals. The plotted curve mus
14、t 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 Impact Strength, Izod, min (ISO 180
15、/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 1.7 kJ/m2 3.5.6.2 At - 40 +/ - 1 C 1.7 kJ/m2 The specimen must be conditioned for min of 6 h at the above specified temperature pri or to impact test. Low temperature testing
16、shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 s. (s) 3.5.7 Heat Deflection Temperature, min 56 C (ISO 75 - 1 and ISO 75 - 2, 80 x 10 x 4.0 +/ - 0.2 mm specimen use center section of specimen A, flatwise, 0.34 +/ - 0.1 mm deflection. At 1.80 MPa)
17、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) 3.5.8.1 Tensile Strength at Yield Change - 25 % max 3.5.8.2 Impact Strength, Izod Change - 25 % max (Test Meth
18、od per para 3.5.6.1 specimens to be notched before heat aging) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 P
19、age 4 of 7 3.7 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 m m/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 WEATHERING RESISTANCE After exposure in accordance with para 3.8.1, 3.8.2, and 3.8.3 the material
20、shall show no fading or color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105 -A02). In addition, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by
21、washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of the afected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.
22、8.1 Xenon Arc Weatherometer Rating 4 - 5 (SAE J1960, 2500 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/ - 0.2 mm thick, smooth surface, low gloss i njection molded specimen) 3.8.2 12 months Florida Rating 4 - 5 12 months Arizona (SAE J1976, 5 deg south, direct weathering inland, specim
23、en size: 150 x 100 mm min, 3.2 +/ - 0.2 mm thick, smooth surface, low gloss injection molded specimen) 3.8.3 24 months Florida Rating 4 24 months Arizona (SAE J1976, 5 deg south, direct weathering inland, specimen size: 150 x 100 mm min, 3.2 +/ - 0.2 mm thick, smooth surface, low gloss injection mol
24、ded specimen) 3.9 ADDITIONAL REQUI REMENTS 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
25、 the engineering drawing. ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 Page 5 of 7 3.10 SUPPLIERS 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 th
26、e properties, composition, construction, color, processing or labeling of the material 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 Mate
27、rials Engineering activity of the proposed changes and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the requ est. Substance restrictions imposed by law, regulations or Ford, apply to the materials ad
28、dressed by this document. The restrictions are defined in Engineering Material Specification WSS - M99P9999 - A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their material
29、s 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 completed copy of their laboratory test reports, signed by a qualified and authorized repre
30、sentative 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 evaluation. Fords engineering approval of a material will be based on its performanc
31、e 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 INFORMATION The material data included herein is for information only and is not a requiremen
32、t for the supplier. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 4.2 - 4.5E - 5/ C (ASTM D 696, - 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 1.15 % ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 Page 6 of 7 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.10 % After 30 minutes at 120 C 0.17 % 5.3 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PP - T20 ENGINEERING MATERIAL SPECIFICATION WSS - M4D729 - A4 Page 7 of 7
