1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2010 06 11 N-STATUS No replacement named A. Pan, APA 1984 01 25 Released 702-035F-11 Page 1 of 3 THERMOPLASTIC POLYESTER, NON-REINFORCED PBT - ESL-M4D359-A3 HIGH IMPACT MODIFIED NOT TO BE USED FOR NEW DESIGN
2、 1. SCOPE: The material defined by this specification is injection moldable or extrusion grade of polybutylene terephthalate polyester based thermoplastic containing no fillers or reinforcements. 2. APPLICATION: This specification was released originally for material used for fuel line clips. 3. REQ
3、UIREMENTS: 3.1 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The spectra established for initial approval shall constitute the reference standard and shall be kept o
4、n file at the designated material laboratory. All samples shall produce spectra that correspond to the reference standard when tested under the same conditions as those specified on the master spectrum. 3.2 MOLDED TEST SPECIMENS 3.2.1 Conditioning and Test Conditions All test values indicated herein
5、 are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity for 24 h prior to testing and tested under the same controlled conditions. 3.2.2 Melting Point, min 216 C (DTA, 20 C/min heating rate) 3.2.3 Specific Gravity 1.21 - 1.25 (ASTM D 792) 3.2.4 Wat
6、er Absorption, max 0.10% (ASTM D 570) 3.2.5 Tensile Strength, min 30 MPa (ASTM D 638) 3.2.6 Flexural Strength, min 42 MPa (ASTM D 790) ENGINEERING MATERIAL SPECIFICATION ESL-M4D359-A3 Page 2 of 3 3.2.7 Flexural Modulus, min 1.3 GPa (ASTM D 790) 3.2.8 Impact Strength, Izod, min (ASTM D 256) Notched 8
7、00 J/m Unnotched No break 3.2.9 Deflection Temperature, min (ASTM D 648) At 0.45 MPa 64 C At 1.82 MPa 42 C 3.2.10 Ash, max 0.6% (FLTM BO 6-2) 3.3 MOLDED PART 3.3.1 Color Natural or as specified on engineering drawing. 3.3.2 Appearance Shall be uniform in density, texture and finish, free of visible
8、porosity, warpage, heat scorch, checks, cracks, chipped edges and uneven surfaces. Shall be free of other contamination. 3.3.3 Specific Gravity 1.21 - 1.25 (ASTM D 792) 3.3.4 Ash, max 0.6% (FLTM BO 6-2) 3.3.5 Additional Requirements Specific requirements for physical properties of molded or extruded
9、 parts shall be specified on the engineering drawing and/or engineering part specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.4 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that orig
10、inally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. ENGINEERING MATERIAL SPECIFICATION ESL-M4D359-A3 Page 3 of 3 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engin
11、eering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List. 5. GENERAL INFORMATION: These data are included for information on
12、ly and are not a requirement. A wide variation in flow rate value exists among the four injection molding grade materials approved for this application to which attention should be directed when molding conditions are chosen. At 250 C with a 2160 g, load values of 15 to 20 g/10 min were recorded for two suppliers while polyesters from two additional suppliers yielded values from 50 to 55 g/10 min.
