1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions Rev 03 2012 06 08 N Status Replaced by WSK-M4D645-A N. Benipal, NA 2008 02 26 Revised Returned back to A status, South America still uses 1985 09 12 Released 9Q2-017D-2 Controlled document at www.MATS Copyright 2012, Ford Global Technologies,
2、LLC Page 1 of 2 POLYETHYLENE, HIGH DENSITY BLOW MOLDING ESL-M4D197-A2 COMPOUND, GASOLINE RESISTANT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high density polyethylene copolymer with a high molecular weight and excellent environmental stress cracking resis
3、tance. 2. APPLICATION This specification was released originally for the material used in fabrication of fuel tanks. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (W
4、SS-M99P1111-A). 3.3 MOLDING COMPOUND 3.3.1 Melt Flow Rate 6.0 - 11.0 g/10 min (ASTM D 1238, 190 C, 21.60 kg) 3.3.1.1 Melt Flow Rate on 12 g/10 min Finished Parts, max 3.3.2 Carbon Black of finished parts, by weight 0.75 - 1.25% (TGA, color carrier resin must be compatible with high density polyethyl
5、ene) 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens All test specimens shall be die cut from compression molded sheets 200 x 200 x 2.0 +/- 0.1 mm unless otherwise specified. Preparation of compression molded sheets according to ASTM D 1928, Procedure C, except; aluminum foil, 180 - 200
6、 C molding temperature, 15 +/- 2 C/min cooling rate. The values of this specification are based on unannealed specimens. ENGINEERING MATERIAL SPECIFICATIONESL-M4D197-A2Copyright 2012, Ford Global Technologies, LLC Page 2 of 2 3.4.2 Density 0.946 - 0.952 g/cm3(ASTM D 792) 3.4.2.1 Density on Finished
7、Parts 0.945 - 0.952 g/cm33.4.3 Tensile Strength at Yield, min 22.1 MPa (ASTM D 638, Type IV specimens, 50 mm/min test speed) 3.4.3.1 Elongation, min 600% 3.4.4 Falling Dart Impact at -29 C No cracking or penetration, slight ductile tear (6.4 mm max) allowed. Test Method: Gardner Impact type tester,
8、12.7 mm dia. dart, 50.8 mm dia. ring, 11.3 J impact. Test specimens-plaques 100 mm x 100 mm x 2.0 +/- 0.1 mm. Minimum of 10 tests. 3.4.5 Brittleness Temperature, max -60 C (ASTM D 746, Procedure B) 3.4.6 Environmental Stress Crack Resistance, min 400 h (ASTM D 1693, F50, Condition A) Note: To be per
9、formed for initial certification and quarterly. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. When this material is used for producing fuel tanks, the inner surface must be treated to produce a hydrocarbon permeation barrier for the reduction of evaporative emissions. The barrier may be produced by the fluorination or the sulfonation process.
