1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2008 02 06 N-STATIUS Removed inactive SL-M4D9575-A; No replacement named; Inserted 3.0; Deleted 3.3, 3.5 & 4 G. Kowalski 1994 11 21 Revised and Retyped, was 10 pages 1979 05 04 Released SM/EQ 8546 TP Printed copies are uncontrolled Copyright 2
2、008, Ford Global Technologies, LLC Page 1 of 5 POLYETHYLENE, HIGH DENSITY, LOW MFI SL-M4D9575-B NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polyethylene molding compound of high density and low melt flow index. 2. APPLICATION The material was originally rel
3、eased as tube for control and actuator assembly headlamp adj. front and rear. 3. REQUIREMENTS Note: The material shall be conditioned for a minimum of 24 h at 23 +/- 2 C and 50 +/- 5% relative humidity prior to test and tested under the same conditions unless specified otherwise. The minimum and max
4、imum values of this specification are based on natural colored and pigmented material. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 REQUIREMENTS FOR GRANULES
5、3.1.1 Melt Index, max 0.3 g/10 minutes (ISO R 1133, Method 4, 190 C with a weight force of 21.2 N) 3.2 REQUIREMENTS FOR COMPRESSION MOLDED TEST SPECIMENS All tests shall be carried out on compression molded specimens with the exception of clause 3.2.7. These test specimens may be either compression
6、molded, injection molded or extruded. Preparation of Test Specimens: The test specimens shall be prepared from compression molded sheets of 200 x 200 mm. Preparation of test specimens according to ISO R 293. The optimum molding conditions shall be as recommended by the supplier of the molding compou
7、nd. Annealing is not allowed. ENGINEERING MATERIAL SPECIFICATION SL-M4D9575-B Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 5 3.2.1 Density, Natural Colored, 0.942 - 0.947 Mg/m3(ISO R 1183, Method A) This range may be exceeded by pigmented material. 3.2.2 Sh
8、ore Hardness D 57 +/- 3 (ISO R 868, specimen dia. 25 mm, specimen thickness 5 mm, 15 s dwell) 3.2.3 Yield Strength, min 18 MPa (ISO R 527, type 1, specimen thickness 3.2 mm, test speed: 50 mm/minute) 3.2.4 Izod Impact Strength, Notched (ISO R 180, specimen size: 63.5 mm x 12.7 mm x 3.2 mm, number of
9、 specimen: min 10 for each test) At 23 C, min 100 J/m At -40 C, min 30 J/m Note: The test specimens must be stored 6 - 8 h at -40 C prior to cold impact test. Testing shall be done within the cold box, if not possible, test can be conducted outside, but within 3 s. 3.2.5 Shear Modulus (ISO R 537, Me
10、thod A, specimen size: 60 x 10 x 1 mm) At 23 C 450 - 610 MPa The shear modulus curve shall be plotted from -50 C to + 150 C and shall be within the tolerance range shown on page 6. At least one measurement within 10 C intervals is necessary to establish the curve. 3.2.6 Vicat Softening Point, min 11
11、7 C (ISO R 306, specimen size: 10 x 10 x 3.2 mm, in silicone oil, except dial gauge is set to zero after weight has been added) Test Condition: Specimen dry as compression molded in case that specimen cannot be tested immediately after molding, they have to be kept in a sealed air moisture proof con
12、tainer filled with silica gel. ENGINEERING MATERIAL SPECIFICATION SL-M4D9575-B Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 5 3.2.7 Flammability 3.2.7.2 SL-M4D9575-B (FLTM EU-BN 024-02) Burn Rate, max 100 mm/minute Note to Flammability: The flammability sha
13、ll be determined on 100 x 355 mm specimens with a thickness of 0.9 - 1.1 mm and smooth surfaces. In order to comply with Federal Motor Vehicle Safety Standard No. 302, the materials, portions of components, and composites shall not burn or transmit a flame across their surface, at a rate of more tha
14、n 100 mm/ minute. To demonstrate compliance, the sample size and method of testing shall be in accordance with FLTM EU-BN 024-02. 3.2.7.2.1 Performance-Environmental Ageing Requirement All materials, portions of components, and composites defined by this specification that have not been treated, mod
15、ified or re-formulated, and exceed a max burn rate of 75 mm per minute as specified by the Flammability Lot Sampling Plan of FLTM EU-BN 024-02, must be evaluated for permanency of the materials flame retardant properties per SK-M99P9500-A, Table 1 according to the accelerated environmental ageing re
16、quirements applicable to the basic material category of this particular specification. Any material, portions of components, and composites defined by this specification that have been treated, modified or reformulated to conform to Flammability Lot Sampling Plan of FLTM EU-BN 024-02, regardless of
17、max burn rate, must be evaluated for both permanency of materials flame retardant properties and changes in mechanical, chemical and physical properties per SK-M99P9500-A, Table 1 applicable to the basic material category of this particular specification. 3.4 SPECIFIC REQUIREMENTS OF FINISHED PART S
18、pecific requirements for the finished part, if required, shall be as specified on Engineering Drawing. ENGINEERING MATERIAL SPECIFICATION SL-M4D9575-B Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 5 5. GENERAL INFORMATION The information given below is provi
19、ded for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 19 - 21 x 10-5 1/C (ASTM D 696) 5.2 MOLD SHRINKAGE 2 - 4% (ASTM D 955, after 48 h) ENGINEERING MATERIAL SPECIFICATION SL-M4D9575-B Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 5 of 5
