1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Revisions1988 09 21 CTS1-CR-361779 ReleasedPage 1 of 6ACRYLIC (PMMA), HIGH IMPACT RESISTANT - ESB-M4D9-A11EXTERIOR - OPTICAL GRADE1. SCOPE:The material defined by this specification is a thermoplastic, rubbermodified po
2、lymethylmethacrylate (acrylic) resin characterized by higherimpact strength than unmodified acrylic. This material is naturallytransparent.2. APPLICATION:This specification was released originally for material used in the 1989F-Series Truck cornering lamps.3. REQUIREMENTS:3.1 STATISTICAL PROCESSSupp
3、liers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyze process/product data sothat variation in the final product is continuousl
4、y reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approvalshall constitute the reference standard and s
5、hall be kept on fileat the designated material laboratory. All samples shall produceIR spectra and thermograms that correspond to the referencestandard when tested under the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedin a con
6、trolled atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested underthe same conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATION ESB-M4D9-A11Page 2 of 63.4 MOLDING COMPOUND3.4.1 Melt Flow Rate 0.8 - 1.3 g/10 min(ISO 1133/ASTM
7、D 1238,230 C, 3.8 kg)3.5 MOLDED TEST SPECIMEN3.5.1 Preparation of Test SpecimensUnless otherwise specified all tests shall be carried outon injection molded one-end gated test specimens.The following dimensions are required:A) 150 x 12.7 x 3.2 +/- 0.2 mm (Tensile Bar)B) 130 x 12.7 x 3.2 +/- 0.2 mmSp
8、ecimens with shorter dimensions shall be cut from thecenter portion of the test specimen A and/or B. Thespecimens shall be prepared according to ISO 294. Noannealing allowed.3.5.2 Density 1.15 - 1.17 g/cm3(ISO 1183, Method A/ASTM D 792,Method A1)3.5.3 Tensile Strength at Yield, min 34 MPa(ISO R 527/
9、ASTM D 638, 150 x 12.7 x3.2 +/- 0.2 mm specimen, 50 mm/mintest speed)3.5.3.1 Elongation at Break, min 35 %(Test Method accordingto para 3.5.3)3.5.4 Flexural Modulus, min 1.7 GPa(ISO 178/ASTM D 790, Method I,Procedure A, 130 x 12.7 x 3.2 +/-0.2 mm specimen, 100 mm support span)3.5.5 Shear Modulus at
10、23 C 576 - 864 MPa(ASTM D 4065, forced constantamplitude, fixed frequency of1 Hz +/- 15 %, strain level below 1 %.Specimen approx. 60 x 12.7 x 3.2 +/-0.2 mm cut from the center ofspecimen A.Additionally, a Shear Modulus vs. Temperature curve shallbe plotted for -50 to +120 C temperature range, at 5
11、Cminimum intervals. The plotted curve must be withintolerance range shown on page 6.ENGINEERING MATERIAL SPECIFICATION ESB-M4D9-A11Page 3 of 63.5.6 Impact Strength, Izod, min(ISO 180, Method A/ASTM D 256, Method A,63.5 x 12.7 x 3.2 +/- 0.2 mm specimen,10 specimens for each test)3.5.6.1 At 23 +/- 2 C
12、 5.2 kJ/m23.5.6.2 At 0 +/- 2 C 1.9 kJ/m2The test specimens must be conditioned forminimum of 6 h at the above specified temperatureprior to impact test. Low temperature testingshall be done within the cold box, if notpossible, test can be conducted outside, butwithin 5 s.3.5.7 Heat Deflection Temper
13、ature, min(ISO 75/ASTM D 648, 130 x 12.7 x3.2 +/- 0.2 mm specimen)3.5.7.1 At 1.82 MPa 68 C3.5.7.1 At 0.45 MPa 75 C3.5.8 Heat Aging Performance(ISO 188/ASTM D 573, 1000 hat 70 +/- 2 C)3.5.8.1 Tensile Strength Change +/- 15 %(Test Method per para 3.5.3)3.5.8.2 Elongation at Break Change +/- 20 %(Test
14、Method per para 3.5.3)3.5.8.3 Impact Strength, Izod Change +/- 15 %(Test Method per para 3.5.6.1,specimens to be notched beforeheat aging)3.5.9 Optical Properties(ASTM D 1003, 3.2 +/- 0.2 mmthick, clear, molded sheet)3.5.9.1 Luminous Transmittance, min 90 %3.5.9.2 Haze, max 3 %3.6 FLAMMABILITY(ISO 3
15、795)Burn Rate, max 100 mm/minThe specimen size required for material approval is 355 x 100 x 3.2+/- 0.1 mm with a smooth surface.ENGINEERING MATERIAL SPECIFICATION ESB-M4D9-A11Page 4 of 63.7 WEATHERING RESISTANCEThe material must withstand an outdoor exposure in accordance withSAE J576, certified by
16、 an approved test laboratory.3.8 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufactured parts shallbe specified on the Engineering drawing, Engineering partsspecification and/or performance specifications. All criticalareas with respect to these properties shall be clearly des
17、ignatedon the engineering drawing.3.9 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material upon which approval wasoriginally granted.Prior to making any change in the properties, composition,construction, color, processing or l
18、abeling of the materialoriginally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the wr
19、itten approval of the Materials Engineeringactivity. Test data, test samples and a new code identificationare to be submitted with the request.Substance restrictions imposed by law, regulations or Ford, applyto the materials addressed by this document. The restrictions aredefined in Engineering Mate
20、rial Specification WSS-M99P9999-A1,unless a different suffix (e.g., A2 or A3) is specified on theengineering document for the application.4. APPROVAL OF MATERIALS:Materials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring app
21、rovalof their materials shall first obtain an expression of interest from theaffected Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity its own laboratory report to the specification (test results,not nominal v
22、alues), the material designation and code number, and testspecimens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.ENGINEERING MATERIAL SPECIFICATION ESB-M4D9-A11Page 5 of 65. GENERAL INFORMATION:The information below is provided for cl
23、arification and assistance inmeeting the requirements to the specification.5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 6-12E-5/ C(ASTM D 696)5.2 MOLD SHRINKAGE(ASTM D 955)5.2.1 Molding Shrinkage. After 48 h at 23 +/- 2 C 0.2 - 0.8 %5.2.2 Post Shrinkage TBD(After 48 h at 80 C)ENGINEERING MATERIAL SPECIFICATION ESB-M4D9-A11Page 6 of 6SHEAR MODULUS vs. TEMPERATURE CURVETBE
