1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 07 N-STATUS No replacement named J. Crist, NA 2005 08 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.6, 3.7 & 4 1986 03 05 Released AR1-6000-155 L. A. Graham, M.P., B.M.M. Printed copies are uncontrolled Copyright 2010, Ford Global Techn
2、ologies, LLC Page 1 of 2 POLYETHER BLOCK AMIDE (PEBA) ESB-M4D529-A THERMOPLASTIC ELASTOMER MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic elastomer comprised of linear and regular chains of rigid polyamide and flexible polyether
3、segments. 2. APPLICATION This specification was released originally for material used as a retainer strap for the glove compartment door. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to moisture
4、 absorption or loss in the service/assembly environment. Information on this material with respect to moisture should be obtained from the responsible PEO Materials Engineering Department. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must c
5、onform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 MOLDING COMPOUND 3.3.1 Melting Point, min 172 C (ASTM D 789) 3.3.2 Moisture Content, max 0.1% (ASTM D 789) 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens All test specimens shall be injection mo
6、lded in accordance with ASTM D 1897. The values of this specification are based on injection molded specimens unless otherwise specified. 3.4.2 Conditioning and Test Conditions All specimens are to be dry as molded. Dry as molded specimens are defined as specimens which immediately upon removal from
7、 mold are sealed in containers that are impermeable to water vapor (maximum specimen moisture content 0.10%). No moisture shall be intentionally added to reach this level. Condition specimens a minimum of 24 h in sealed containers at 23 +/- 2 C. ENGINEERING MATERIAL SPECIFICATIONESB-M4D529-APrinted
8、copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 2 Conduct tests in the standard laboratory atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity. Individual specimens shall not be removed from closed containers until immediately before testing. 3.4.3 Density 1.00 -
9、 1.04 g/cm3(ASTM D 792) 3.4.4 Hardness Durometer D 53 - 63 (ASTM D 2240, instantaneous reading) 3.4.5 Tensile Strength at Yield, min 17 MPa (ASTM D 638, Type I specimen, 3.2 mm thickness, 50 mm/min test speed) 3.4.5.1 Elongation at Yield, min 18% 3.4.6 Flexural Modulus, min 340 MPa (ASTM D 790, Meth
10、od I, Procedure A, 127 x 12.7 x 6.4 mm specimen) 3.4.7 Impact Strength, Izod No break (ASTM D 256, Method A, 63.5 x 12.7 x 6.4 mm specimen) 3.4.8 Water Absorption, max 1.0% (ASTM D 570, 24 h immersion) 3.5 FLAMMABILITY Burn Rate, max 100 mm/min (FLTM BN 024-02, without the lot sampling plan) unless
11、otherwise specified on drawing In addition, the test specimen shall not exhibit any flashing or sudden flaming on either surface in excess of the above max value. 5. GENERAL INFORMATION The information given below is provided for assistance and clarification in meeting the requirements of this speci
12、fication. 5.1 MOLD SHRINKAGE 0.015 - 0.020 (ASTM D 955, after 48 h, injection molded sample) 5.2 COEFFICIENT OF LINEAR THERMAL EXPANSION 23 x 10-5/C (ASTM D 696, -30 C to +30 C) 5.3 TENSILE STRENGTH AT MAX LOAD, min 50 MPa (ASTM D 638, Type I specimen, 3.2 mm thickness, 50 mm/min test speed) 5.3.1 Elongation at Break, min 380% 5.4 IMPACT STRENGTH, IZOD (ASTM D 256, Method A, 63.5 x 12.7 x 6.4 mm specimen) Unnotched No break
