1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 26 N-STATUS No known use. No Replacement Named C. Mracna, NA 2004 07 30 Revised Para 3.0 inserted; paras 3.1, 3.2.2, 3.5, 3.6 and 4 deleted 1985 03 22 Released C9P1-DR531035 Printed copies are uncontrolled Copyright 2009, Ford Global T
2、echnologies, LLC Page 1 of 3 POLYURETHANE ELASTOMER, ESB-M2D348-A2 REACTION INJECTION MOLDED (RIM) NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a reaction injection molded (RIM) thermosetting polyurethane. 2. APPLICATION This specification was released origina
3、lly for material used in the manufacture of modular windows for the 1985 Aerostar. 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). 3.2 MOLDED TEST SP
4、ECIMENS 3.2.1 All test specimens shall be cut from 3.2 mm nominal thickness slab stock prepared from production compound. The physical properties shall be determined as an average of 6 specimens; 3 in one direction and the other 3 oriented 90 in the other direction. 3.2.3 Hardness, Durometer D, Subg
5、roup Avg 33 - 40 (ASTM D 2240) 3.2.4 Tensile Strength, Subgroup Avg, min 12 MPa (ASTM D 412, Die A) 3.2.4.1 Elongation, Subgroup Avg, min 300% 3.2.5 Tear Strength, min 30 kN (ASTM D 624, Die C) 3.2.6 Flexural Modulus (ASTM D 790, Method I, Procedure B, 50 mm span, 13 mm test speed, 25 x 10 mm specim
6、en size) 3.2.6.1 At -29 +/- 2 C, max 80 MPa 3.2.6.2 At 23 +/- 2 C, min 20 MPa ENGINEERING MATERIAL SPECIFICATIONESB-M2D348-A2 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.2.6.3 At 70 +/- 2 C, min 12 MPa ENGINEERING MATERIAL SPECIFICATIONESB-M2D348-A2 Pr
7、inted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.2.7 Low Temperature Brittleness, -29 C No cracks (ASTM D 2137, buff samples to required thickness on one side only. The unbuffed side of the sample shall be subjected to tension during testing) 3.2.8 Water Imme
8、rsion Dimensional +0.018% Stability, Expansion, max (FLTM BO 129-01, after 240 h) 3.2.9 Water Absorption, By Weight, max (FLTM BO 129-02) 3.2.9.1 After 24 h 3.75% 3.2.9.2 After 240 h 6.0% 3.2.10 Heat Aged Subgroup Avg (ASTM D 573, 7 days at 100 +/- 2 C) 3.2.10.1 Hardness, Durometer D Change +/- 3 3.
9、2.10.2 Tensile Strength Change, max -10% 3.2.10.3 Elongation Change, max -5% 3.3 QUALIFICATION TESTS Qualification requirements shall be used for initial approval and when questions regarding material quality arise. 3.3.1 Heat Aging Performance, Subgroup Avg (ASTM D 573, 1000 h at 100 +/- 2 C) 3.3.1
10、1 Hardness, Durometer D Change +/-5 3.3.1.2 Tensile Strength Change, max -25% 3.3.1.3 Elongation Change, max -25% 3.3.2 Humidity Aging Performance, Subgroup Avg (1000 h at 37 +/- 1 C/99 +/- 1% R.H., conduct tests 2 +/- 0.25 h after removal from test chamber) 3.3.2.1 Hardness, Durometer D Change +/-
11、10 3.3.2.2 Tensile Strength Change, max -25% 3.3.2.3 Elongation Change, max -25% ENGINEERING MATERIAL SPECIFICATIONESB-M2D348-A2 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 3 3.4 COMPATIBILITY WITH PRODUCTION ADHESIVES Molded material shall demonstrate com
12、patibility with production adhesives meeting the adhesion requirements outlined in the current performance specifications. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 DENSITY, Nominal 1.0 g/cm3(ASTM D 792) 5.2 MOLD SHRINKAGE 0.012 mm/mm (ASTM D 955) 5.3 COEFFICIENT OF LINEAR THERMAL EXPANSION 16 x 10-5/C (ASTM D 696)
