1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Para. No. Revisions1978 04 21 Metricated and Retyped CAHI-RD572066-10 BCF JBM1964 09 03 Released AT1 #1516WP 3948-a Page 1 of 3SHEETING, COTTON - VINYL - POLYAMIDE - ACRYLIC COATED ESB-M9H41-ASHEETING, COTTON - URETHANE COATED
2、 INACTIVE ESB-M9H41-BSHEETING, COTTON - ETHYLENE VINYL ACETATE COATED INACTIVE ESB-M9H41-C1. SCOPEThe material defined by this specification is a cotton sheeting, evenlywoven, thoroughly cleaned, free from waste and of good commercialquality, coated with an appropriate bonding agent.2. APPLICATIONTh
3、is specification was released originally for material used as afoundation or reinforcement in heat or dielectric bonding.3. REQUIREMENTS3.1 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relati
4、vehumidity for not less than 24 h prior to testing and tested underthe same conditions unless otherwise specified.3.2 COMPOSITION AND CONSTRUCTIONThe material shall consist of a woven cotton sheeting ofESB-M9H38-A quality with the following coating:ESB-M9H41-A Vinyl - Polyamide - AcrylicCoatingESB-M
5、9H41-B Urethane CoatedESB-M9H41-C Ethylene Vinyl AcetateCoating3.3 WEIGHT, min(FLTM BN 6-1)ESB-M9H41-A 4.4 oz/yd 2 (0.149 kg/m 2 )ESB-M9h41-B 4.4 oz/yd 2 (0.149 kg/m 2 )ESB-M9H41-C 5.5 oz/yd 2 (0.186 kg/m 2 )3.4 BREAKING STRENGTH, min(ASTM D 1682, Grab Method)Warp 45 lb (200 N)Fill 40 lb (178 N)ENGI
6、NEERING MATERIAL SPECIFICATION ESB-M9H41-AINACTIVE ESB-M9H41-BINACTIVE ESB-M9H41-CWP 3948-b Page 2 of 33.5 TRAP TEAR, min(FLTM BN 22-1)Warp 4.0 lb (18 N)Fill 4.0 lb (18 N)3.6 STRETCH AND SET, % range(FLTM BN 4-1)Stretch SetWarp 1 - 6 0 - 2Fill 6 - 12 0 - 53.7 SHRINKAGE, max(FLTM BN 4-1)Warp 6.0 %Fil
7、l 3.0 %3.8 COLD FLEXIBILITY(FLTM BN 102-01)No cracks or evidence of failure at -34 C using a 1/4 in (6 mm)mandrel.3.9 ASSEMBLY3.9.1 ConstructionThe cover materials shall not be subjected to excessiveheat and pressure during the bonding operations. Adhesionof the bonded areas shall be sufficient to p
8、ermit sewing ofthe seat insert into the finished assembly.3.9.2 Heat Aging(FLTM BN 13-3)The cover material shall show no evidence of discolorationand/or cracking after 20,000 cycles of “W“ flex at -18 C.3.9.3 U-V Fadeometer Aging(FLTM BN 13-3)The cover material shall show no more evidence of fade or
9、staining than the master sample approved for production bythe Textile Engineering Section, BEPE Materials EngineeringDepartment. Also, it shall show no evidence of degradationor cracking after 20,000 cycles of “W“ flex at - 18 C.3.9.4 U-V Fluorescent Sunlamp Aging(FLTM BN 13-3)The cover material sha
10、ll show no more evidence of fade orstaining than the master sample approved for production bythe Textile EngineeringENGINEERING MATERIAL SPECIFICATION ESB-M9H41-AINACTIVE ESB-M9H41-BINACTIVE ESB-M9H41-CWP 3948-b Page 3 of 33.9.4 U-V Fluorescent Sunlamp AgingSection, BEPE Materials Engineering Depart
11、ment. Also, itshall show no evidence of degradation or cracking after20,000 cycles of “W“ flex at - 18 C.3.10 SUPPLIERS RESPONSIBILITYMaterial supplied to this specification must be equivalent to thatoriginally approved. Changes in formulation or processing shallnot be made without prior approval as
12、 described in Supplier ProcedureI-A.4. APPROVAL OF SUPPLIERSSuppliers to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specific material toa new/existing ES-M specification is contained in Supplier Procedure I-A.Approved new suppliers will be added to the Engineering Materials ApprovedSource List.
