1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para. No. Revisions1978 10 06 Metricated, Renumbered and Retyped CAHI-RD572066-1141975 02 19 Released AE1-6000-172WP 3948-a Page 1 of 2SHEETING, SEAT COVER ASSEMBLY AID - SPUN BONDED ESB-M9H86-APOLYPROPYLENE, 0.4 oz/yd 2 (14 g
2、/m 2 )1. SCOPEThe material defined by this specification is an embossed non-woven, spunbonded polypropylene sheeting of good quality and uniform composition.2. APPLICATIONThis specification was released originally for material used as a sheath,to encase front seat back foam pads, thus providing a lo
3、w frictionsurface to facilitate the installation of front seat back coverassemblies, on the 1975-1/2 Mark IV Versailles model.3. REQUIREMENTS3.1 CONDITIONINGAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relativehumidity for 2
4、4 h prior to testing and tested under the samecontrolled conditions.3.2 COMPOSITION(ASTM D 629)Polypropylene 100%3.3 WEIGHT, min 0.4 oz/yd 2(FLTM BN 6-1) (14 g/m 2 )3.4 BREAKING STRENGTH, min(ASTM D 1682, Grab Method)MD 4.0 lb (17.8 N)XMD 4.5 lb (20.0 N)3.5 ELONGATION, min(ASTM D 1682, Grab Method)M
5、D 45%XMD 40%3.6 MULLEN BURST STRENGTH, min 13 psi(ASTM D 231, Average of 5 tests) (89.6 kPa)3.7 STIFFNESS, max(FLTM BN 20-1)Bending Length at 41.5 24 mmENGINEERING MATERIAL SPECIFICATION ESB-M9H86-AWP 3948-b Page 2 of 23.8 FLAMMABILITYIn order to comply with Federal Motor Vehicle Safety Standard No.
6、302, the materials, portions of components, and composites shallnot burn, or transmit a flame across its surface, at a rate of morethan 4 in (101 mm) per min. To demonstrate compliance, the samplesize and method of testing shall be in accordance with FLTM BN24-2.3.9 PERFORMANCE - ENVIRONMENTAL AGING
7、All materials, portions of components, and composites defined bythis specification that have not been treated, modified orreformulated and exceed a max burn rate of 3.0 in (76 mm) per minas specified by the Flammability Lot Sampling Plan of FLTM BN 24-2,must be evaluated for permanency of the materi
8、als flame retardantproperties per ESB-M25P3-A according to the acceleratedenvironmental aging requirements applicable to the basic materialcategory of this particular specification.Any material, portions of components, and composites defined bythis specification that have been treated, modified or r
9、eformulatedto conform to Flammability Lot Sampling Plan of FLTM BN 24-2,regardless of max burn rate, must be evaluated for both permanencyof materials flame retardant properties and changes in mechanical,chemical and physical properties per ESB-M25P3-A applicable to thebasic materials category of th
10、is particular specification.3.10 FLAMMABILITY TEST PROGRAMMaterials, portions of components, and composites governed by thisspecification must also comply with the requirements ofES-D3AB-11014-AA.3.11 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginall
11、y approved. Changes in formulation or processing shallnot be made without prior approval as described in SupplierProcedure I-A.4. APPROVAL OF SUPPLIERSSuppliers to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specificmaterial to a new/existing ES-M specification is contained in SupplierProcedure I-A. Approved new suppliers will be added to the EngineeringMaterials Approved Source List.
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