1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 21 N-STATUS No Replacement Named C. Mracna, NA 2004 07 19 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.5 & 4 deleted 1977 09 20 Released CAG2-761433-C4 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC P
2、age 1 of 2 POLYURETHANE (PUR) FOAM, HIGH DENSITY ESA-M2D264-A POLYURETHANE (PUR) FOAM, LOW DENSITY ESA-M2D264-B NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications are polyurethane foam molding compounds. 2. APPLICATION These specifications were released originally f
3、or material used as a decorative insert on steel wheels where good impact resistance and paintability are important considerations. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Producti
4、on Materials (WSS-M99P1111-A). 3.4 TEST SPECIMEN The following material properties shall be determined on specimens taken from the parts whenever possible. Where part configuration does not permit specimen selection, molded slabs may be used. M2D264-A M2D264-B 3.4.1 Density, kg/m3, min 720 480 (ASTM
5、 D 3574, Test A) 3.4.2 Tensile Strength, MPa, min 5.0 2.0 (ASTM D 3574, Test E, specimen thickness 6.35 +/- 1.60 mm, skin on one surface) 3.4.3 Elongation, %, min 75 50 (Test according to para 4.2) 3.4.4 Tear Strength, kN/m, min 15 5.0 (ASTM D 3574, Test F, specimen thickness 6.35 +/- 1.60 mm, skin
6、on one surface) 3.4.5 Compression Set, % max 35 Not (ASTM D 3574, Test D, Required except compress 25%) 3.4.6 Hardness, Durometer A 78 - 92 70 - 90 (ASTM D 2240) ENGINEERING MATERIAL SPECIFICATIONESA-M2D264-A/BPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2
7、M2D264-A M2D264-B 3.4.7 Compression Load Deflection, 4.1 Not MPa, min Required (ASTM D 3574, Test C, except the minimum thickness shall be 12.7 mm) Specimen to be cut from 12.7 mm molded slabs with cut surfaces on all edges. Preflex twice to 6.0% of thickness, allow 10 +/- 5 minutes to recover. Prel
8、oad to 138 Pa, remeasure thickness and deflect to 50%. 3.4.8 Dry Heat Aging (ASTM D 3574, Test K, except age at 120 +/- 2 C, for 22 h, specimens shall have skin on one surface) Tensile Strength Change, % max -40 -20 Elongation Change, % max -20 -20 3.4.9 Indentation Recovery No more than 0.25 mm ind
9、entation shall be visible after a 24 h recovery period. The penetrator for this test is a rod with a hemispherical head 16 mm in diameter. The rate of penetration shall be 25 - 51 mm/minute. The depth of penetration shall be 8 mm for specimens which are 16 mm or more in thickness, and 50% of the sam
10、ple thickness for samples which are 16 mm or less in thickness. After penetrating to the specified depth at the specified rate, the penetrator shall be immediately withdrawn and the sample allowed to recover for 24 h. The temperature of the sample shall be 23 +/- 2 C throughout the test and recovery
11、 period. 3.4.10 Cold Impact Test No evidence of cracking and must recover 95% in 24 h Test Method: A 50 x 50 x 12.7 mm specimen as cut from a cast slab or production part with cut surfaces on all edges shall be conditioned for 24 h at 40 C and while at this temperature subjected to 9 J impact per FL
12、TM BO 117-02. After impact, the sample shall be allowed to recover at 23 +/- 2 C for 24 h. 3.4.11 Humidity Aging Tensile Strength Change, % max -50 -50 Elongation Change, % max -30 -30 Tear Strength Change, % max -50 -50 Test Method: Condition parts or specimens for 10 days at 70 C and 100% relative humidity. Allow recovery at 23 +/- 2 C for a minimum of 2 h and a maximum of 8 h. Subject parts to above tests. 3.4.12 Ozone Resistance No cracking or other (ASTM D 518, Procedure B) detrimental defects
