1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2009 11 19 N-STATUS No replacement named J. Crist, NA 1978 04 25 Metricated and Retyped CAH1-RD572066-15 1974 05 16 Released CAD1-PA556198-1 Page 1 of 3 TUBING, POLYVINYL CHLORIDE - HEAT SHRINKABLE ESB-M4D36
2、0-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this specification is a nonrigid heat shrinkable polyvinyl chloride tubing. 2. APPLICATION: This specification was released originally for material used as a protective, cosmetic coating on cylindrical applications, such as hatch li
3、ft gas spring cylinders (where painting is not feasible). This material may also be used as an insulator in electrical applications. 3. REQUIREMENTS: 3.1 TUBING PRIOR TO SHRINKAGE (As received from supplier) 3.1.1 Color Black, unless otherwise specified on the engineering drawing. 3.2.1 Shrinkage (4
4、 min at 149 C) Inside Diameter Shrinkage 30 - 55 % Longitudinal Shrinkage, max 40 % 3.2 TUBING AFTER SHRINKAGE Test specimens prepared from tubing after exposure to 149 C for 4 min.) 3.2.1 Specific Gravity, max 1.40 (ASTM D 792) 3.2.2 Hardness (ASTM D 2240, instantaneous reading) Durometer “A“ 85 -
5、95 Durometer “D“ 38 - 48 3.2.3 Tensile Strength, min 2500 psi (17.2 MPa) (ASTM D 412, Die “C“) 3.2.4 Elongation, min 200 % (ASTM D 412) ENGINEERING MATERIAL SPECIFICATION ESB-M4D360-A Page 2 of 3 3.2.5 Tear Strength, min 200 lb/in (35 kN/m) (ASTM D 1938) 3.2.6 Heat Resistance Test Method: Expose a m
6、inimum of three 6 in (150 mm) lengths of tubing preshrunk per para. 3.2, to 102 +/- 2 C for 7 days for each test listed under para. 3.2.6. Cool to 23 +/- 2 C before conducting the indicated tests. Properties shall be reported as percentage change after heat aging at 102 +/- 2 C. Weight Change, max 3
7、0 % Hardness - Durometer “A“, change, max 5 (ASTM D 2240, instantaneous reading) Color Stability: The material shall not stain, exhibit color change, or change in hue in accordance with rating 4 max of the AATCC Gray Scale for evaluating change in color. Longitudinal Shrinkage, max 15.0 % 3.2.7 Fla
8、mmability SE - 0 in (mm)/min (FLTM BN 24-2, without the lot sampling plan) In addition, the test specimen shall not exhibit any flashing or sudden flaming on either surface in excess of the above maximum value. 3.2.8 Infrared Spectrophotometry Ford Motor Company, at its option, may conduct infrared
9、analysis of material/parts supplied to this specification. The curves established for initial approval shall constitute the reference standard and shall be kept on file at Central Laboratory. All samples shall produce curves that correspond to the reference standard when tested under the same condit
10、ions as those specified on the master curve. 3.3 SUPPLIERS RESPONSIBILITY Material supplied to this specification must be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPL
11、IERS: Suppliers to this specification must be approved by the affected product engineering 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 Appr
12、oved Source List. ENGINEERING MATERIAL SPECIFICATION ESB-M4D360-A Page 3 of 3 5. GENERAL INFORMATION: This information is for direction of the user and is not a requirement for the supplier. 5.1 DIMENSIONS Selection of tubing dimension for a given application should be based upon recommendation of t
13、he tubing supplier. 5.2 DIELECTRIC STRENGTH Wall Thickness, in (mm) V/mil (kV/mm) 0.020 (0.51) 700 (28) 0.030 (0.76) 570 (22) 0.040 (1.02) 480 (19) 0.060 (1.52) 400 (16) 5.3 DIELECTRIC CONSTANT AT 1 kilocycle (1kHz) 7.0 5.4 DISSIPATION FACTOR AT 1 kilocycle (1 kHz) 0.14 5.5 VOLUME RESISTIVITY 1 x 10
14、11cm 5.6 LOW TEMPERATURE FLEXIBILITY This material becomes inflexible at sub-freezing temperatures and should not be specified for applications where the possibility exists for flexure at low temperature. 5.7 TENACITY In application, this material is retained by encapsulation only. Due to the absence of interface adhesion, a coating of this material is easily removed when not locked into position by encapsulation. Therefore, this material should be specified only when application permits “locking“ into position by encapsulation.
