1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2009 11 19 N-STATUS No replacement named J. Crist, NA 1980 05 27 Released R #3-7/CH8K-RD-876099 Page 1 of 3 POLYURETHANE FOAM, SOUND DEADENING - HEAT FORMED ESH-M4D390-A NOT TO BE USED FOR NEW DESIGN 1. SCOP
2、E: The material defined by this specification is a flexible polyurethane foam which exhibits sound deadening properties. The foam will be heat formed and therefore may exhibit varying densities in the finished part. 2. APPLICATION: This specification was released originally for material used as gask
3、eting for heater and air conditioning units. 3. REQUIREMENTS: 3.1 FOAM (As blown) 3.1.1 Color Charcoal 3.1.2 Density, min 36 kg/m3(ASTM D 3574) 3.1.3 Tensile Strength, min 83 kPa (ASTM D 3574, Die “C“) Elongation, min 100% 3.1.4 Tear Resistance, min 175 N/m (ASTM D 3574, Die “C“) 3.1.5 Compression S
4、et, max 40% (ASTM D 3574, 50 x 50 mm slab) 3.1.6 Compression Force Deflection 4.8 kPa (ASTM D 3574, except 25% compression) 3.1.7 Sound Absorption Coefficient (ASTM C 384, initial approval only) Thickness, mm Frequency, Hz 250 500 1000 2000 13 0.03 0.10 0.30 0.75 25 0.09 0.30 0.65 0.80 ENGINEERING M
5、ATERIAL SPECIFICATION ESH-M4D390-A Page 2 of 3 3.1.8 Cold Flexibility at -40 C Must pass Test Method: Condition 3 specimens, 50 x 200 mm x slab thickness, for 5 h minimum in a cold chamber maintained at -40 +/- 2 C. Similarly, condition mandrel having a 50 mm diameter. Without removing the foam or m
6、andrel from the cold chamber, bend the foam specimens 180 around the mandrel in no less than 5 s. 3.1.9 Ozone Rating ESB-M9P1-A (FLTM BP 1-1) 3.1.10 Resistance to Deterioration No visible degradation (FLTM BO 12-1, Steps 2, 3, 4, 6, 7, 8) 3.1.11 Odor No offensive odor “as received“ or after heat agi
7、ng 22 h at 125 +/- 3 C. 3.1.12 Cell Structure A homogeneous arrangement of fine cells when viewed at 10 magnification. 3.2 FINISHED PART The foam shall exhibit the following properties. 3.2.1 Color Charcoal 3.2.2 Density 44 - 112 kg/m3(ASTM D 3574) The test sample shall be taken from an area exhibit
8、ing the greatest reduction in volume. 3.2.3 Odor No offensive odor “as received“ or after heat aging 22 h at 125 +/- 3 C. 3.2.4 Cell Structure A homogeneous arrangement of the cells when viewed at 10 magnification. 3.2.5 Water Impermeability Must pass (FLTM BO 12-3) ENGINEERING MATERIAL SPECIFICATIO
9、N ESH-M4D390-A Page 3 of 3 3.3 INFRARED 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 curves established for initial approval shall constitute the reference standard and
10、shall be kept on file at Center Laboratory. All samples shall produce curves that correspond to the reference standard when tested under the same conditions as those specified on the master curve. 3.4 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that origina
11、lly approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List.
