1、 INCH-POUND A-A-59296 JulY31.1998 SUPERSEDING June 24, 1971 MIL-I-22266C COMMERCIAL ITEM DESCRTPTION INSULATING COMPOUND, ELECTRICAL (FOR FIELD SPLICING APPLICATIONS) The General Services Administration has authorized the use of this commercial item description by all federal agencies. 1. SCOPE. Thi
2、s commercial item description covers two component, room-temperature curing, insulating compounds for field-splicing applications. 2. CLASSIFICATION. The insulating compound shail be of the following types as specified (see 6.2 and 6.4): Type I Epoxy resin Class A Class B Packaged in film bags Packa
3、ged in metal containers Type III Polyurethane resin Class A Class B Packaged in film bags Packaged in metal containers 3. SALIENT CHARACTERISTICS. 3.1 Materials. The insulating compound shall be a two-component system consisting of a thermosetting resin base of the room temperature curing epoxy type
4、 or elastomer of the polyurethane type and a curing agent. The component materials of the resin base and curing agent shall be such that the cured insulating compounds shall not be corrosive to the metals from which the electrical cables are made, nor shall the cured compound cause deterioration of
5、jacketing materials used in cable construction. recommendations, additions, deletions, clmfications, etc. , and any data which may improve this document should be sent to: Commander, Naval Air Warfare Center I Aircraft Division. Code 4141OOB120-3. Highway 547, Lakehurst, NJ 08733-5 100. FSC 5970 Lic
6、ensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59296 M 9038054 0003078 T54 M I A-A-59296 3.1.1 Unit of issue -wes I and III. class A. The unit of issue shall consist of a bag made of flexible transparent hig
7、h strength film. The bag shall have two compartments with an intedly rupturable barrier separating the two compartments and shall be rupturable by manipulation of the bag without the aid of tools. The inner bag shall permit mixing of the bag with the hands after rupture of the internal banier. The p
8、hysical properties of the bag shall conform to the values shown in table I. Unless otherwise specified in the contract or order (see 6.2), the insulating compound shall be furnished in 2-3/4,6-1/4, or 12-1/2 fluid ounce sizes. This unit of issue bag shall be further protected by placing the bag in a
9、 sealed transparent high strength bag. The unit of issue inner bag shall meet the requirements of table I when tested in accordance with 4.7 and 4.8. TABLE I. Test vaiues for unit of issue inner bag. Tests (Types I and III, Class A) Package strengih (4.7): shall not leak 2-3/4 fl. OZ. Size 6-1/4 fl.
10、 OZ. Size 12-112 fl. 02. size Air inclusion (4.8): 2-3/4 fl. OZ. Size 6-1/4 fl. OZ. Size 12-1/2 fl. oz. Size Test value and tolerance Pounds (min): 200 250 300 Sq. inch (max): 0.25 0.35 0.50 3.1.2 Unit of issue - wes I and III, class B. Unless otherwise specified in the contract or order (see 6.2),
11、the unit of issue for the insulating compound shall be a kit consisting of separate metal cans of one quart resin and one quart curing agent. 3.2 Primer. The use of a primer specified by the manufacturer to improve the adhesion of the compound to the substrate is permitted. Primer, when specified by
12、 the manufacturer, shall not be coxrosive to the electricai metal cable or cause deterioration to the jacketing materials and shall be used in aU tests where required for the insulating compound to conform to specication requirements. 3.3 Application. The insulating compound shall be used on electri
13、cal cables, for insulating ends against moisture, and electrically insulating cable splices. It shall be hrmulated to flow between conductors causing them to be sealed and insulated to preserve the electrical and physical properties of the cable against moisture, dirt, hes, fungus, or other foreign
14、materiais. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-59296 m 9038054 0003079 990 m Water absorption erCent, =) Shrinkage (percent, max) Hardness A-A- 5 9296 1 1 ASTM-D570 1.6 1 4.6 70-90 (60-70) - 21 ASTM-D2240 (Shore D) (Shore A) 3.4 Ph
15、vsical properties. The physical properties of the insulating compound shall be as specified in table II. 3.5 Electrical properties. The electrical properties of the insulating compound shall be as specified in table III. 3.6 Shelf storage life. Types I and III material furnished in either class A or
16、 class B packages shall be capable of being stored for 1 year fi-om the date of manufacture and meet the requirements of tables II and III, provided that the daily mean temperature of the ambient air at the storage location falls within the range of -40 OC to 55 “C (-40 OF to 13 1 OF). Table II. Phy
17、sical prooerties. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I I A-A-5 9296 TABLE III. Electrical Properties. Test Dielectric strength (volt/mil 1/8-inch saiiipie) Dielectric constant (max.) 100 Hertz 30 OC 60 OC 70 “C Dissipation factor (max.
18、) 100 Hertz 30 OC 60 “C 70 “C Volume resistivity, (min.) (23.1 fl.1 OC) (ohm-cm) Requirement Type I 300 (min.) 4.0 5.0 6.5 0.03 0.08 0.30 3.3 x 1013 Type III 300 (min.) 6.0 7.5 - 0.25 0.15 0.05 4.0 x 1013 Test method ASTM-D 149 - 1/ ASTM-D15O - 1/ ASTM-Dl50 - 2/ ASTM-D257 Notes to table III: 1/ One
19、specimen shall be cast as specified in 4.3.2. Three disks or squares shall then be cut fiom the dab for measurement. Metal foil electrodes without guard rings shall be applied to the specimen by using a very thin film of petrolatum. The electrodes so applied shall be thoroughly rolled to exclude air
20、. The average of three measurements at each temperature shall be reported. - 2/ Four disk specimens, 3 inches in diameter and 1/8 inch thick, shall be prepared as specied in 4.3.1.1. 4. QUAZIITY ASSURANCE PROVISIONS 4.1 Product conformance. The products provided shall meet the salient charactefistic
21、s of this commercial item description, conform to the producers own drawings, specifications, standards, and quaty assurance practices, and be the same product offered for sale in the commercial market. The government reserves the right to require proof of such conformance. 4.2 Market acceptability.
22、 The item offered must have been sold to the government or commercial market for at least one year. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-59296 9018054 O003081 549 A-A-5 9296 4.3 Test specimens. 4.3.1 Molds. 4.3. i. 1 Mold for sheet
23、specimens. The mold shall consist of two highly polished plates, 3/8-inch thick, coated with a release agent and spaced by 1/8-inch thick U-shaped spacers of polytetrafhoroethylene or any material to which the compound will not adhere. The mold assembly shall be clamped together with sufficient pres
24、sure to prevent leakage of the compound. A mold to produce 6-inch by 6-inch specimens is suggested. The resulting cast slabs shall then be cut into the test specimens required. 4.3.1.2 Mold for shrinkage tests. The mold for linear shrinkage shall be a mold which wiil cast a test specimen 4 inches lo
25、ng by 3/4 inch wide by 1-1/4 inches high. The tolerance for the dimensions of the length and width sha be 0.010 inch. There shall be no variations of the length and width of the cast specimen because of such causes as mold release, flashing not being removed, or other inaccuracies of the mold which
26、would give false readings for these dimensions. A mold release shall be used to ensure that the test specimen will not adhere to the mold. 4.3.2 Casting. The compound ingredients shall be mixed in accordance with the nan nu facturer) directions, then poured into the molds. When the ingredients are m
27、ixed at temperatures above 23 OC, the molds shall be preheated approximately 10 OC above the mixing temperature before the mixture is poured into the molds. In pouring, precautions shall be taken to avoid the entrapping of air. 4.3.3 Curing of test specimens. Unless otherwise specified in the indivi
28、dual test method, specimens shall be cured for 48 1i 2 hours at 73 f 2 OF (23 f 1 OC) at a relative humidity of 50 f 4 percent. Ail specimens shall be removed from the molds in 24 f 2 hours, and the total cure time shall include the time the specimen is in the mold. Unless otherwise specified, cured
29、 specimens shall be tested within two hours from the end of the cure period. 4.4 Viscosity. The viscosity of the mixed resin and hardener shail be determined by means of a Brookfield viscosimeter or equal, according to the directions supplied by the manuhcturer of the instrument, at a temperature of
30、 25 f 0.5 OC. The viscosimeter spindle and speed shall be according to directions supplied by the manufacturer of the instrument consistent with the viscosity of the material tested at a temperature of 25 f 0.5 OC. The use of a 25 OC temperature allows a 2 “C rise over the 23 OC standard test temper
31、ature. This rise usually occurs as a result of stirring, mixing, and handling. 4.5 Gel time. Samples for the gel time shall be mixed in accordance with the manufacturers instructions, except that immediately before mixing, the materials shali be stabilized at an ambient temperature of 25 f 0.5 “C. T
32、he sample, consisting of a 100-gram mass, shall be poured into a 3- ounce paper cup immediately after mixing. The samples shall be placed in a 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59296 9018054 0003082 485 = A-A-5 9296 clear plastic
33、box (approximately 9 inches by 9 inches by 9 inches) for reduction of drafts. The gel time shall be reported as the time required for the insulating compound to become stringy, as determined by the raising and lowering of a 1/16 inch diameter applicator stick. The resin need not become completely so
34、lid for this gel point. 4.6 Linear shrinkaae. Three specimens 4 inches long by 3/4 inch wide by 1-1/4 inches high shall be cast in a mold as specified in 4.3.1.2 and 4.3.2. 4.6.1 Dimensions. The length and width of each specimen shall be determined by averaging three determinations of each dimension
35、. The percent linear shrinkage shall be calculated as follows: (Mold dimension - average specimen dimension) x 100 Mold dimension This shall be done for both dimensions on each specimen. The percent of linear shrinkage shall be reported as the average of the six determinations. 4.7 Package strend te
36、st (class A only). The filled inner bag enclosed in its outer bag (see 3.1.1) shall be placed between two flat steel plates, 6 inches by 12 inches by 0.25 inch thick. This assembly shall be placed in a hydraulic press and loaded for not less than 1 minute to the load prescribed in table I for the pa
37、ckage size under test. Following this test, the inner bag shall be removed form its outer bag and examined for rupture. Any leakage fiom the inner bag or transfer of contents form one compartment to the other shall be cause for rejection of the lot represented. 4.8 Air inclusion test (class A only).
38、 Following the test of 4.7, the inner bag shall be laid on a flat horizontal surface and allowed to rest until the included air bubbles, if any, float to the top surface of the bag. The combined area of the bubbles, as viewed through the top surface of the bag, shall not exceed the prescribed values
39、 of table I for the applicable size package. 5. PACKAGING. 5.1 Preservation. packing. and marking. Preservation, packing, and marking shd be as specified in the contract or order. 6. NOTES. 6.1 Copies of the Amencan Society for Testing and Materials (ASTM) documents may be obtained fiom ASTM, 100 Ba
40、rr Harbor Drive, West Conshohocken, PA 19428-2959. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- A-A-5929b 90L8054 0003083 311 AA 59296 CID Number I A-A-59296 - X Type designator 1A = Type I, Class A 1B = Type I, Class B 3A = Type III, Class A 3
41、B = Type IV, Class B 6.2 Orderinn Data. Procurement documents should specifi the following: a. Title, number, and date of this commercial item description. b. Type and class of insulating compound. c. Unit of issue, if merent from that specified in 3.1.1 d. Levels of packaging and packing. 6.3 Natio
42、nal Stock Numbers (NSNs). The following is a list of NSNs assigned which correspond to this CID. The list may not be indicative of all possible NSNs associated with the CID. NSN Tuee 5970-00-752-5430 Type I, Class A 6.4 Part identification number PIN). The following part identification numbering pro
43、cedure is for government purposes and does not constitute a requirement for the contractor. 6.5 Cross reference. Type II material previously furnished under MIL-S-22266B (ASG) dated July 26, 1961 has been deleted. Type III, polyurethane material, was added to MIL-I-22266C. MILITARY INTERESTS: custodians: Army - CR Air Force - 11 Preparing activity: Navy - AS (Project 5970-1 169) Review Activities: Navy - SH Air Force - 85,99 Army - CR4, MI DLA-GS 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
