1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 02 N-STATUS Replaced by WSS-M99P32-B A. Reaume 2004 08 24 Revised Para 3.0 inserted; para 3.6, 3.7 & 4 deleted 1984 08 28 Released H80-46 C.F. Carter Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1
2、of 3 POLYURETHANE FOAM, SOUND DEADENING - DIE CUT ESH-M2D346-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a flexible polyurethane foam which exhibits sound deadening properties. The foam will be die cut. 2. APPLICATION This specification was released origina
3、lly for material used as a sound absorbing gasket and seal for air conditioning evaporator housings. 3. REQUIREMENTS 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).
4、3.1 FOAM (As blown) 3.1.1 Density, min 44 - 54 kg/m3(ASTM D 3574) 3.1.2 Tensile Strength, min 83 kPa (ASTM D 3574, Die C) Elongation, min 100% 3.1.3 Tear Resistance, min 175 N/m (ASTM D 3574, Die C) 3.1.4 Compression Set, max 40% (ASTM D 3574, 50 x 50 mm slab) 3.1.5 Compression Force Deflection 4.8
5、kPa (ASTM D 3574, except 25% compression) ENGINEERING MATERIAL SPECIFICATIONESH-M2D346-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.1.6 Sound Absorption Coefficient (ASTM C 384, initial approval only) Thickness, mm Frequency, Hz 250 500 1,000 200 13 0
6、.03 0.10 0.30 0.75 25 0.09 0.30 0.65 0.80 3.1.7 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 a mandrel having a 50 mm diameter. Without removing the foam or mand
7、rel from the cold chamber, bend the foam specimens 180 around the mandrel in no less than 5 s. 3.1.8 Ozone Rating ESB-M9P1-A (FLTM BP 101-01) 3.1.9 Resistance to Deterioration No visible (FLTM BO 012-01, Steps 2, 3, 4, 6, 7, 8) degradation 3.1.10 Odor No offensive odor “as received“ or after heat ag
8、ing 22 h at 125 +/- 3 C. 3.1.11 Cell Structure A homogeneous arrangement of fine cells when viewed at 10 magnification. 3.1.12 Water Impermeability Must pass (FLTM BO 112-03) 3.1.13 Bacteria/Fungus Resistance Must pass (ES-D8VH-19A672-AA) 3.1.14 Resistance to Aging No evidence of brittleness or crac
9、king, when a 25 x 100 mm specimen is hand flexed, after an exposure period of 22 h in a mechanical convection oven maintained at 150 +/- 2 C. 3.2 FLAMMABILITY In order to comply with Worldwide Vehicle Safety Standards (e.g., FMVSS No. 302), the materials, portions of components, and composites shall
10、 not burn, or transmit a flame across its surface, at a rate of more than 100 mm/min. To demonstrate compliance, the sample size and method of testing shall be in accordance with FLTM BN 024-02. ENGINEERING MATERIAL SPECIFICATIONESH-M2D346-A Printed copies are uncontrolled Copyright 2006, Ford Globa
11、l Technologies, LLC Page 3 of 3 3.3 PERFORMANCE - ENVIRONMENTAL AGING All materials, portions of components, and composites defined by this specification that have not been treated, modified or reformulated and exceed a max burn rate of 76 mm/min as specified by the Flammability Lot Sampling Plan of
12、 FLTM BN 024-02, must be evaluated for permanency of the materials flame retardant properties per ESB-M25P3-A according to the accelerated environmental aging requirements applicable to the basic material category of this particular specification. Any material, portions of components, and composites
13、 defined by this specification that have been treated, modified or reformulated to conform to Flammability Lot Sampling Plan of FLTM BN 024-02, regardless of max burn rate, must be evaluated for both permanency of materials flame retardant properties and changes in mechanical, chemical and physical
14、properties per ESB-M25P3-A applicable to the basic materials category of this particular specification. 3.4 FLAMMABILITY TEST PROGRAM Materials, portions of components, and composites governed by this specification must also comply with the requirements of ES-D3AB-11014-AA. 3.5 NOTICE: Uncompressed foam does not consistently meet the flammability requirements and should not be used in the uncompressed state.
