1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2015 02 27 Re-Activate See Summary of Revisions M. Katz, NA 2013 07 04 N-STATUS A.Wedepohl, NA 1987 11 17 Released CAR1-PF183193 M. Myers Controlled document at www.MATS Copyright 2015, Ford Global Technologies, LLC Page 1 of 3 TUBING,
2、 POLYOLEFIN, HEAT SHRINKABLE, DUAL WALL, ESB-M99D56-A2 ADHESIVELY LINED, SEMI-RIGID, FLAME RETARDANT 1. SCOPE The material defined by this specification is a flame retardant, selectively crosslinked, dual wall polyolefin tubing whose diameter shall reduce to a predetermined size upon application of
3、heat in excess of 135 C. The tubing shall be fabricated from an irradiated, thermally stabilized, modified polyolefin composition, and shall be lined with a thermoplastic adhesive. 2. APPLICATION These specifications were released originally for material used to seal electrical harness wire splices
4、or electrical components such as fuselinks, diodes and resistors. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 FORMED PARTS The tubing shall b
5、e fabricated from thermally stabilized, modified polyolefin and shall be crosslinked by irradiation. It shall be homogeneous and essentially free from flaws, defects, pinholes, bubbles, seams, cracks, and inclusions. 3.2.1 Dimensions As specified on (ASTM D 2671) engineering drawing Shall be specifi
6、ed before and after shrink. 3.2.2 Longitudinal Change +0%, -10% (ASTM D 2671) 3.3 SPECIFIC GRAVITY 1.35 max (ASTM D 2671, Outer Wall Only) 3.4 LOW TEMPERATURE FLEXIBILITY AT -30 C No cracking (ASTM D 2671, Procedure C, Outer Wall Only) Test Method: Specimens of tubing, as supplied (sizes as describe
7、d in ASTM D 2671, Procedure C) and a mandrel (see Table 1 for size) shall be conditioned for 4 h at -30 +/- 2 C. While at this temperature, the specimens shall be wrapped around the mandrel for at least 360 in approximately 2 s. ENGINEERING MATERIAL SPECIFICATION ESB-M99D56-A2 Copyright 2015, Ford G
8、lobal Technologies, LLC Page 2 of 3 3.5 HEAT SHOCK 250 C (ASTM D 2671, 150 mm specimen length) Specimens of tubing shall be conditioned for 4 h in a 250 +/- 5 C oven. The specimens shall be removed from the oven, cooled to 23 +/-2 C, and then visually examined for evidence of dripping, flowing, or c
9、racking in the polyolefin. Any side cracking caused by flattening of the specimen on the mandrel shall not constitute failure. 3.6 TENSILE STRENGTH AT MAX LOAD 10 MPa min (ASTM D 2671, 25 mm benchmarks, 50 mm initial jaw separation, 150 mm specimen length, 500 +/-50 mm/min test speed, outer cross-se
10、ction only) 3.6.1 Elongation at Break 200% min (Test according to para 3.6) 3.7 SECANT MODULUS 225 MPa min (ASTM D 882, Procedure A at 2% strain, outer cross-section only, before shrink) 3.8 CONCENTRICITY Six 150 mm specimens of tubing, as supplied, shall be measured for minimum and maximum wall thi
11、ckness. Concentricity shall be calculated as follows: Wmin C = - x 100% Wmax Where: Wmin = Minimum Wall Thickness Wmax = Maximum Wall Thickness Concentricity as supplied 60% min 3.9 COPPER MIRROR CORROSION No corrosion (ASTM D 2671, Procedure A, 16 h at 121 C) 3.10 DIELECTRIC STRENGTH 15 kV/mm min (
12、ASTM D 2671, short time) 3.11 FLAMMABILITY (SAE J1128, para 6.6 Resistance to Flame Propagation or ISO 6722-1, para 5.12 Resistance to Flame Propagation) Shall not continue to burn for more than 60 s No dripping or flowing 3.12 COLOR Black or as specified on Engineering Drawing4. GENERAL INFORMATION
13、 The information given below is provided for clarification and assistance in meeting the requirements of these specifications. Contact for questions concerning Engineering Material Specifications. ENGINEERING MATERIAL SPECIFICATION ESB-M99D56-A2 Copyright 2015, Ford Global Technologies, LLC Page 3 of 3 TABLE 1 MANDREL DIMENSIONS FOR HEAT SHOCK AND LOW TEMPERATURE FLEXIBILITY Tubing Diameter of Mandrel in in (mm) 3/64 to 3/16 inclusive 1/2 (12.7) 1/4 to 1 inclusive 3/4 (19.1) 5. SUMMARY OF REVISIONS 2015 02 27 Reactivated, made editorial changes, and updated flammability
