1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2000 09 25 Revised Updated A. Cockman 1992 01 02 DF00E00107002102 Added B2, updated 1980 06 18 CF4K - RD887294 - 25 Released Was XF - M8GX15 Printed copies are uncontrolled Page 1 of 3 Copyright 2000, Ford G
2、lobal Technologies, Inc. GASKET, CROSSLINKED POLYETHYLENE FOAM, CLOSED CELL ESF-M8G156-A GASKET, CROSSLINKED POLYETHYLENE FOAM, CLOSED CELL, ESF-M8G156-B LOWER DENSITY GASKET, CROSSLINKED POLYETHYLENE FOAM, CLOSED CELL ESF-M8G156-B2 HIGHER ELONGATION 1. SCOPE The materials defined in these specifica
3、tions are high density closed cell polyethylene foam gaskets. 2. APPLICATION These specifications were released originally for material used for gaskets in the windshield wiper motor and horn. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to the C
4、ompanys Quality System Requirements. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms established for initial approval shall constitute the re ference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and t
5、hermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/ - 2 C and 50 +/ - 5 % relative humidity for not less than 24 h prior
6、 to testing and tested under the same conditions unless otherwise specified. 3.4 COLOR Natural, or as specified on the engineering drawing. ENGINEERING MATERIAL SPECIFICATION ESF-M8G156-A/B/B2 Page 2 of 3 Copyright 2000, Ford Global Technologies, Inc. A B B2 3.5 DENSITY, kg/m3, min 86.5 56.1 57 (AST
7、M D 3575) 3.6 CELL COUNT PER LINEAR 75 75 90 25.4 mm, min 3.7 HARDNESS, DUROMETER “AA“ - 20 +/ - 5 25 +/ - 5 (ASTM D 2240 ) 3.8 LOAD DEFLECTION, kPa 84 - 147 48 - 110 58 - 100 (ASTM D 3575) Test Method: Sample size 51 x 51. Determine sample thickness under a 0.45 kg preload. Deflect the sample 25 %
8、at 12.7 mm/minute. Record as kPa at 25 % deflection. 3.9 TENSILE STRENGTH, kPa, min 690 552 620 (ASTM D 3575) 3.10 ULTIMATE ELONGATION, %, min 125 100 200 (ASTM D 3575) 3.11 TEAR RESISTANCE, kN/m, min 4.4 2.6 4.0 (ASTM D 3575) 3.12 DIMENSIONAL STABILITY, % +/ - 2.5 +/ - 2.5 +/ - 2.5 Test Method: Lin
9、ear dimens ional expansion or shrinkage after being subjected to dry heat at 82 +/ - 2 C for 24 h. Specimen size should be as large as sample part permits but should not exceed 305 x 305 mm x part thickness. 3.13 LOW TEMPERATURE FLEXIBILITY (A, B & B2) No cracking Test Method: A sample of production
10、 part shall be conditioned 16 h at - 40 C and flexed 80 deg over a 25.4 mm mandrel. Specimen size: 152 mm x width of part up to 25.4 mm x part thickness up to 25.4 mm. 3.14 WATER ABSORPTION, STATIC, %, max 10 10 5 (ASTM D 570, 24 h water immersion) 3.15 SOLVENT RESISTANCE (A, B & B2) No surface tack
11、iness or evidence of foam deterioration ENGINEERING MATERIAL SPECIFICATION ESF-M8G156-A/B/B2 Page 3 of 3 Copyright 2000, Ford Global Technologies, Inc. 3.16 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which appr
12、oval was originally granted. Prior to making any changes to the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify the affected Purchasing, and Materials Engineering activit
13、ies (with reasons) of the proposed changes. Upon notification of the Company, further instructions will be provided. Note: Suppliers should be prepared to provide test data and sampl es demonstrating compliance to this specification, if requested. Substance restrictions imposed by regulations or Com
14、pany direction applies to the materials addressed by this document. The restrictions are identified in Restricted Substance Management S tandard WSS - M99P9999 - A1. 4. APPROVAL OF MATERIALS This specification is intended to define the performance and/or properties of finished parts or systems of co
15、mbined materials. An Engineering Material Approved Source listing is not applicable for this s pecification. Product Engineering materials referenced in this document and/or the affected engineering drawing, which require prior Engineering approval, are shown in the Engineering Material Approved Source List under the specification cited.
