1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2015 02 27 Editorial Separated from ESB-M99D56-A2 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 TUBIN
2、G, POLYOLEFIN, HEAT SHRINKABLE, DUAL WALL, NOT FOR NEW DESIGN ESB-M99D56-A1 ADHESIVELY LINED - SEMI-RIGID 1. SCOPE The material defined by these specifications is a selectively crosslinked dual wall polyolefin tubing whose diameter shall reduce to a predetermined size upon application of heat in exc
3、ess 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 or electric
4、al components such as fuselinks, diodes and resistors. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirement
5、s For Production Materials (WSS-M99P1111-A). 3.4 FORMED PARTS The tubing shall be 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. 3.4
6、.1 Dimensions As specified on (ASTM D 2671) engineering drawing Shall be specified before and after shrink. 3.4.2 Longitudinal Change, max +0%, -10% (ASTM D 2671) 3.5 SPECIFIC GRAVITY, max (ASTM D 2671, Outer Wall Only) 3.5.1 ESB-M99D56-A1 1.00 ENGINEERING MATERIAL SPECIFICATION ESB-M99D56-A1 Copyri
7、ght 2015, Ford Global Technologies, LLC Page 2 of 3 3.6 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 described in ASTM D 2671, Procedure C) and a mandrel (see Table 1 for size) shall be conditione
8、d 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. 3.7 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 remo
9、ved from the oven, cooled to 23 +/-2 C, and then visually examined for evidence of dripping, flowing, or cracking in the polyolefin. Any side cracking caused by flattening of the specimen on the mandrel shall not constitute failure. 3.8 TENSILE STRENGTH AT MAX LOAD, min 10 MPa (ASTM D 2671, 25 mm be
10、nchmarks, 50 mm initial jaw separation, 150 mm specimen length, 500 +/-50 mm/min test speed, outer cross-section only) 3.8.1 Elongation at Break, min 200% (Test according to para 3.8) 3.9 SECANT MODULUS, min 225 MPa (ASTM D 882, Procedure A at 2% strain, outer cross-section only, before shrink) 3.10
11、 CONCENTRICITY Six 150 mm specimens of tubing, as supplied, shall be measured for minimum and maximum wall thickness. Concentricity shall be calculated as follows: Wmin C = x 100% Wmax Where: Wmin = Minimum Wall Thickness Wmax = Maximum Wall Thickness 3.10.1 Concentricity as supplied, min 60% 3.11 C
12、OPPER MIRROR CORROSION No corrosion (ASTM D 2671, Procedure A, 16 h at 121 C) 3.12 DIELECTRIC STRENGTH, min 15 kV/mm (ASTM D 2671, short time) . ENGINEERING MATERIAL SPECIFICATION ESB-M99D56-A1 Copyright 2015, Ford Global Technologies, LLC Page 3 of 3 3.14 COLOR 3.14.1 ESB-M99D56-A1 Clear 5. GENERAL
13、 INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 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)
