1、ENGINEERING MATERIAL SPECIFICATION Date 1990 03 01 natcriol yam Release No. Release/Revision C/O1031533 Re leased H. Siewert ACETAL (POM) COPOLYMER, MOLDING COMPOUND EXTERIOR 1. SCOPE The material defined by this specification is a UV stabilized for exterior use acetal copolymer based on trioxane. 2
2、. APPLICATION This specification was released originally for material used for exterior functional automotive applications. 3. REQulRmENTs 3.1 STATISTICAL PROCESS Suppliers must conform to th0 requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein
3、 is required for material/source approval. Appropriate statistical tools must be used to analyze process/product data so that variation in tha final product is continuously reduced. INFRARED SPECTROPHOTOHETRY AND/OR THERMAL ANALYSIS 3.2 Ford Motor Company, at its option, may conduct infrared and/or
4、thermal analysis of material/parts supplied to this specification. The IR spectra and thennograms 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 corre
5、spond 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 +/- 5 % relative humidity for not less than 26 h prior to testing and tested
6、under the same conditions unless otherwise specified. 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate (IS0 1133/ASTM D 1238, 190 C, 2.16 kg) 7 - 11 g/10 minutes WP 3948-a m 9009360 0006023 8T2 Page 1 qf6 WSK-M4D748-A c-3 ENGINEERING MATERIAL SPECIFICATION 3.5 MOLDED TEST SPECIMEN 3.5.1 3.5.2 3.5.3 3.5.4 3
7、.5.5 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 nun (Tensile Bar, IS0 3167) B. 120 x 10 x 4.0 +/- 0.2 PPP Specimens with shorter dimensi
8、ons shall be cut from the center portion of the test specimen A and/or B. The specimens shall be prepared according to IS0 294. No annealing allowed. Density 1.38 - 1.43 g/crn3 (IS0 1183, Method A/ASM D 792, Method Al) Tensile Strength at Yield, min (IS0 R 527/ASTH D 638M, 150 min x 10 x 4.0 +/- 0.2
9、 rinn specimen, 50 mm/minute test speed) 60 MPa 3.5.3.1 Elongation at Break, min (Test Method according to para 3.5.3) Flexural Modulus, min (IS0 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mn specimen, 64 mm support spaa) Shear Modulus at 23 C (ASM D 4065, forced constant amplitud
10、e, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimen approx. 60 x 10 x 4.0 +/- 0.2 plll cut from the center of specimen A. Specimen length between clamps 35-40 nun. Soak time at each temperature interval - 3 minutes minimum) 1s % 2.3 GPa 0.88 - 1.33 GPa Additionally, a Shear Modulus
11、 vs. Temperature cume shall be plotted for - 50 to + 150 G temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. WP 3948-b 9009160 000b024 739 W Pege 2. of 6 c-3 ENGINEERING MATERIAL SPECIFICATION WSK-M4D748-A 3.5.6 Impact Strength, Izod, min
12、(IS0 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.1 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 4.0 ld/m2 3.5.6.2 At - 40 +/- 2 C 3.5 w/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Lov temperatur
13、e testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, ruin 4.0 +/- 0.2 mm specimen) (ISO 75/sm D 648, 120 x io x 3.5.7.1 At 1.82 MPa 90 c 3.5.7.2 At 0.45 HPa 140 C 3.5.8 Heat Aging Performance (IS0 188/ASTH D 5
14、73, 150 +/- 50 air changes/h, 1000 h at 130 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be dstermined at the time of the aged properties determination) 3.5.8 1 Tensile Strength at Break change +/- 20 % (Test M
15、ethod per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max +/- 25 % (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (IS0 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 sur
16、face. WP 3948-b m 9009360 0006025 675 m Paga 3, of 6 - ENGINEERING MATERIAL SPECIFICATION WSR-M4D748-A 3.7 3.8 3 9 WEATHERING RESISTANCE After exposure in accordance with 3.7.1, 3.7.2 and 3.7.3, the material shall. show no color change in excess of specified AATCC rating (AATCC Gray Scale for Evalua
17、ting Change in Color, 10 step). 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 polishing with Ford car polish (auto wax) at permission of the affected Product Development
18、 Materials Activity. 3.7.1 Xenon Arc Weatherome ter (SAE 51960, 1060 kJ/m2 exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.2 12 months Florida (FLTM BI 160-01, 5 deg south, direct weathering inland, specimen size: 150 x 100 nun, minimu
19、xn, 3.2 +/- 0.2 mp thick, molded in smooth polished mold) 3.7.3 24 months Florida (FLTM BI 160-01, 5 dag south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) Rating 4 Rating 4 tbd ADDITIONAL aEQmamENTS Specific requirements for
20、material and/or manufactured parts sball 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. SUPPLIER S RESPONSIBILITY All materials sup
21、plied 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 labelling of the material originally approved under this specification, whet
22、her 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 writtan approval of the Materials Engineering activity. Test data, tes
23、t samples and a new code identification are to be submitted with the request. WP 3948-b Paw 4 sf 6 9009160 0006026 501 4. 5. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material .Specificat
24、ion WSS-H99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their
25、 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 its own laboratory report to the specification (test results, not nominal values), t
26、he m&terial designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List. GENERAL INFORHATION The information below is provided for clarification and assistance in meeting the requirements to the speci
27、fication. 5.1 5.2 5.3 5.4 5.5 COEFFICIENT OF LINEAR THERHAL EXPANSION 10 - 12E-5/ G (ASTI4 D 696) MOLD SHRINKAGE (IS0 2577, approx. 150 x 100 x 3.2 +/- 0.2 um injection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 5.2.2 Post Shrinkage (Separate specimens required for each test)
28、After 18 h at 80 C e After 30 minutes at 120 C WATER ABSORPTION (IS0 62, 24 h/ASTM D 570, 24 h, 50 +/- 1 mm diameter, 3.1 +/- 0.1 mm thick specimen) HARDNESS. DUROMETER D (IS0 868/ASTM D 2240) D I.XENS IONAL STABILITY 2.0 - 2.5 % 0.10 - 0.40 % 0.10 - 0.40 % 0.20 - 0.30 % 80 - 88 The phrase “anneal a
29、fter molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineering requirements. WP 3348-b m 7007Lb0 0006027 448 = Peg. 5 of 6 e ENGINEERING MA- SPECIFICATION WSK-H4D748 -A WP 3948-b SHEAR MODULUS / SCWJaMODUL &IPd Page6 of6 m 7009360 000b028 384 m
