1、MIL-I-24391C SUPERSEDING MIL-I-24391B 17 June 1987 (see 6.68) 9 March 1990 MILITARY SPECIFICATION INSULATION TAPE, ELECTRICAL, PLASTIC, PRESSURE-SENSITIVE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 ScoDe. This specification- cove
2、rs one type of plastic, electric, pressure-sensitive, self-extinguishing insulating tape for use at ambient temperatures of not less than minus 12 degrees Celsius (“C) nor more than 65OC. 1.2 Part or identifvins numbers Dins. Part numbers under this specification are formulated as follows (see 3.3.1
3、 and 6.2): AMSC N/A FSC 5970 DISTRIBUTION STATEMENT A, Approved for public release; distribution is unlimited. Specification number Size identifier (see 1.2.1) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be
4、addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washing- ton, DC 20362-5101 by using the self-addressed Standard- ization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. Provided by IHSNot for ResaleNo reproductio
5、n or networking permitted without license from IHS-,-,-MIL-I-24391C 1.2.1 Size identifier. A two position field is used to identify size -(see 3.3.1) . 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part .of -th
6、is document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense- Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL TT-T-29
7、1 - Thinner, Paint, Mineral Spirits, PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-C-96 - Cans, Metal, 28 Gage and Lighter. PPP-F-3 2 O - Fiberboard; Corrugated and Solid, Regular and Odorless. Sheet Stock (Container Grade), and Cut Shapes. PPP-T-60 - Tape: Packaging, Waterproof. MILITARY MIL-L-19140
8、 - Lumber and Plywood, Fire-Retardant Treated. STANDARDS MILITARY MIL-STD-104 - Limits for Electrical Insulation MIL-STD-2073-1 - DoD Materiel Procedures for Color. Development and Application of Packaging Requirements. (Unless otherwise indicated, copies of federal and military specifications and s
9、tandards are available from the Naval Publications and Forms Center, (Ath: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.2 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the docu
10、ments which are DOD adopted are those listed in the issue of the DODISS cited in the 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24391C solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the iss
11、ues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 618 - Standard Methods of Conditioning Plastics and Electrical Insulating Materials for Testing. .(DoD adopted) D 1000 . - Standard Methods of Testing Pressure- Sensitive Adhesive Coated Tap
12、es Used for Electrical Insulation. D 3951 - Standard Practice for Commercial Packaging, (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103 .) (Non-Government standards and other publications are normal
13、ly available from the organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the tex
14、t of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Uualification. Tapes furnished under this specification shall be products which are authorized by the qualifying activ
15、ity for listing on the applicable qualified products list at the time of award of contract (see 4.3 and 6.4). 3.2 Material. 3.2.1 Backinq. The backing shall consist of a plastic film which shall meet the requirements of this specification. 3.2.2 Adhesive. The adhesive shall be pressure-sensitive, wa
16、ter insoluble, homogenous, and coated in a smooth and evenly distributed layer on one side of the backing. The adhesive shall require neither solvent, heat, nor any other preparation prior to application. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS
17、-,-,-MIL-I-2439LC 59 7377906 0427803 4 MIL-I-24391C 3.2.3 Recovered materials. Unless otherwise specified herein, all material, and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from authorizing the use of recovered ma
18、terials to the maximum extent practicable without jeopardizing the intended use. The term 8trecovered materialstt means materials which have been collected or recovered from solid waste reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be in
19、terpreted to mean that the use of used products is allowed under this specification unless otherwise specifically specified. 3.3 Finished tape, 3.3.1 Width. The tape shall be furnished in the widths specified (see 6.2) in accordance with table I. The tape shall have a tolerance of plus or minus 0.03
20、 inch. TABLE I. Tape characteristics. Dash number Width (inch) Spool inside diameter (inches) o1 I 0.50 I 1 + 1/16, - O 02 0.75 03 1.00 04 I 1.50 1 1-1/2 + 1/16, -0 3.3.2 Length. Unless otherwise specified (see 6.2), the length of tape in the roll shall be a minimum of 36 yards. 4 Provided by IHSNot
21、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-2437LC 57 m 7977906 0427802 b MIL-I-24391C 3.3.3 Thickness. The thickness of the tape shall be O. 0085 inch with a tolerance of plus or minus 0.001 inch. 3.3.4 Color. Unless otherwise specified (see 6.2), the color
22、 of the tape shall be black. Colors other than black shall conform to MIL-STD-104. 3.4 Rolls. Unless otherwise specified (see 6.2) , the tape shall be uniformly and smoothly wound in rolls, with the adhesive side in, without liner or separator, no more than two splices per roll on cores in accordanc
23、e with table L. The cores shall have sufficient rigidity to prevent distortion of the roll under- normal conditions of use. The splices shall not separate when the roll is unwound in test or in use. 3.4.1 Markincr of the rolls. Each roll of tape shall be harked inside the core or side of the tape wi
24、th numerals or letters indicating the month- and year of manufactur. In addition, “For direct Government acquisitiongg, the contractors name and designation of product shall be stamped inside the core. 3.5 Physical properties. The tape shall conform to requirements specified in table II. the TABLE I
25、I. Physical properties for insulation tape. Property Breaking strength Dielectric break- down : After water immersion: After 4 hours at 7OoC exposure: Units Requirements Pounds/inch width 15 minimum average Volts (minimum average reading per roll) 7000 6000 5 Provided by IHSNot for ResaleNo reproduc
26、tion or networking permitted without license from IHS-,-,-MIL-1-2437LC 59 m 7779906 0427803 B m “ MIL-I-24391C TABLE II. Phvsical properties for insulation tape - Continued. Property Adhesion: At 23OC To steel To backing To steel To backing At minus 12OC: Unrolling: 2 3OC minus 12 Elongation at minu
27、s OC Flexible at minus 12OC Accelerated aging (7 days 65OC, 90 percent relative humidity) Shelf storage (2 years) Flammability High humidity insulation resis- ance Units Ounces/inch width minimum average Ounces/inch width (maximum individual reading) Percent (minimum individual reading) Cracks or ho
28、les Adhesion factor (percent minimum) Requirements 16 16 16 16 64 128 No mass transfer or breaking 100 None 75 Shall conform to: Adhesion to backing, and unrolling at 23C and breaking strength. No excessive adhesive flow on sides, no telescoping greater than 1/4 inch, no gapping more than 1/16 inch.
29、 Self extinguishing time, seconds maximum, average 2 Megohms, minimum .25 x lo6 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24391C MIL-I-2437LC 57 m 7777906 0427804 T 3.6 Storaqe. 3 6.1 Performance, Following a 2 year storage period, the
30、tape shall meet the shelf storage requirements of table II. 3,7 Workmanship. The pressure-sensitive adhesive tape shall be uniformly constructed and free form defects which impair the intended usefulness of the material. The adhesive coating shall be uniform, covering the entire area of one side of
31、the tape. Edges shall be clean cut, straight, and unbroken. Rolls shall be evenly wound and the finished product shall conform to the levels of quality established herein. 4. . QUALITY ASSURANCE PROVISIONS 4.1 ResDonsibilitv for inspection. .Unless otherwise specified in the contract or purchase ord
32、er, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection re
33、quirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections ar deemed necessary to ensure supplies and services conform to prescribed requirements (see 6.3) . 4.1.1 Respon
34、sibility for compliance. All items shall meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve th
35、e contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of the manufacturing operations, is an acceptable practice to ascertain conformance to requirements, howe
36、ver, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material (see 6.3). 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) Qualification insp
37、ection (see 4.3). (b) Quality conformance inspection (see 4.4). 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-24391C 4.3 Qualification inspection. Qualification inspection shall include the submission of samples as specified in 4.3.1 and th
38、e qualification tests as specified in 4.3.2. 4.3.1 Qualification samples. Qualification inspection samples shall consist of 10 rolls of l-inch wide tape. 4.3.2 Qualification tests. The qualification tests of the insulation tape -shall consist of the tests as specified in 4.6 through 4.6.10. Five rol
39、ls of tape shall be used for the initial qualification tests; the remaining five rolls shall be reserved for tests after 2 year shelf storage. Unless otherwise specified herein-, a minimum of three specimens shall be run for each test. Failure of any averaged test results to conform to the requireme
40、nts of. this specification shall be cause for rejection of a qualification approval. 4.4 Quality conformance inspection. 4.4.1 Inspection lot. For sampling purposes, an inspection lot for examinations and tests shall consist of all material of the same type, width, and color submitted for inspection
41、 and delivery at the same time. A lot is defined in to 10 rolls of tape. 4.4.2 Inspection of the end item. For examinations specified in 4.4.2.1, 4.4.2.2, and 4.4.2.3, sample units shall be rolls of tape. For examination specified in 4.4.2.4, shipping containers shall be designated as the sample uni
42、ts. 4.4.2.1 Examination of the end item for defects in appearance and construction. Sample tape selected in accordance with table III shall be examined for the following defects: 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-ZLI37LC 57 9779
43、906 0427806 3 = Examination 1 Appearance MIL-I-24391C Defects Any tears, cuts, or holes, blisters, creases, folds or puckers, adhesive missing, presence of dirt, foreign material or imbedded particles. The outside turn of tape shall be omitted from examination. TABLE III. Samplinq for defects in app
44、earance and construction. 1 Lot size Sample size 2 - 25 3 26 - 150 8 151 - 280 13 281 - 500 20 501 - 1200 32 1201 - 3200 50 3201 - 10000 80 10001 - 35000 125 35001 - over 200 - lJ All defective items shall be replaced with acceptable items. All defective items shall be replaced with acceptable items
45、 O prior to acceptance. o Inspect sample size until reject criteria is reached O Reject lot may be screened and resubmitted for inspection and retest. 4.4.2.2 Examination of the end item for dimensional tests. Sample tape selected in accordance with table IV shall be examined for any of the followin
46、g dimensional defects: Examination Defects Width Varies by more than plus or minus O. 03 inch from width specified (see 3.3.1). Length (See 3.3.2). Thickness Varies by more than 0.001 inch (see 3.3.3). Core Core not within tolerance specified in table specified (see 3.4.1). I. Month and year of manu
47、facture not 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-I-211371C 57 M 7799706 01127807 5 - -_I MIL-I-24391C The outside turn of tape shall be omitted from examination. 10 Provided by IHSNot for ResaleNo reproduction or networking permit
48、ted without license from IHS-,-,-MIL-I-2439LC 59 9999906 0427808 7 m MIL-I-24391C TABLE IV. Sampling for dimensional examination and examination workmanship and appearance. 1/ 2 - 15 16 - 50 51 - 150 151 - 500 501 - 3200 3201 - 10000 10001 - over Lot size Sample size L lJ All defective items shall b
49、e items. 3 5 7 8 18 22 29 replaced with acceptable O All defective items shall be replaced with acceptable items prior to lot acceptance. O Inspect sample size until reject criteria is reached Reject lot may be screened and resubmitted for inspection O and retest. 4.4.2.3 Examination of the assembled roll tape for defects in workmanship and appearance. The assembled r
