1、I INCH-POUND MILC-24757(SH) 9 November 1990 MILITARY SPECIFICATION CLOTH, FBERGLASS, COATED This speciflcation is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all departments and agencies of the Department of Defense. i. SCOPE 1.1 Scope. This
2、 specification covers one type of inherently fire-safe, shrink-safe, woven cloths. 1.2 Classification. Cloth covered by this specification shail be as specified (see 6.2): 100 percent fiberglass base material that is coated on both sides in accordance with paragraph 3.5 2. APPLICABLE DOCUMENTS 2.1 G
3、overnment documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this 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 Specification
4、s and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department o
5、f the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. I AMSC NIA FSC 4210 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot
6、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24757 42 W 777790b Oq57457 O =. MIL-C-24757( SH) STANDARDS FEDERAL FED-STD-4 FED-STD-191 MILITARY MIL-STD-105 Glossary of Fabric Imperfections Textile Test Methods Sampling Procedures and Tables for Inspection by At
7、tributes (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadeladelphia, PA 19111-5094) 2.1.2 Other Government documents, drawings, and publications. T
8、he following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. FEDERAL, TRADE COMMISSION PUBLICATIONS Textile Fiber Products Identification Act (Copies may be
9、 obtained from the Federal Trade Commission, G Pennsylvania Avenue, Washington, DC 20580.) 2.2 Non-Government publications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those l
10、isted in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) AATCC Color Transference Chart
11、(Copies may be obtained from the American Association of Textile Chemists and Colorists, PO Box 12215, Research Triangle Park, NC 27709.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 578 Standa
12、rd Specication for Glass Fiber Strands (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 normally available from the organizations that prepare or distribute t
13、he documents. These documents may also 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 text of this document takes precedence. Nothing in this document, h
14、owever, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.4), in accordance with 4.3. 3.2 Material. 3.2.1 Fibers. Fiberglass fiber: The
15、fiber shall be “Ct filament type fiberglass (see 4.1.1 and 4.5). 3.2.2 Yarns. The warp and filling yarns shall be singles (see 4.5). 3.2.3 Fiber content. The fiber content shall be as specified in 3.2.1 when tested in accordance with 4.5 (see 4.1.1). . 3.3 Weave. The weave shall be of a type which d
16、oes not promote potential fiber breakdown resulting in tensile strength loss after extended exposure to foldedkreased storage. Plain and taffeta weaves are not recommended. 3.4 Color. The color of the finished cloth shall approximate the standard sample that has been approved by the contracting offi
17、cer. The finished cloth shall be gold in color (see 6.2.1). 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-24757 42 MIL-C-24757(SH) m 999990b 0457459 4 m ! 3.4.1 Colorfastness. The dyed cloth shall show fastness to laundering (after 3 cycles
18、), crocking, and light (20 hours) equal to or better than the standard sample. When no standard sample has been established or designated as applicable to colorfastness, the dyed and finished cloth shall show “good“ fastness to laundering (after 3 cycles), light (after 20 hours exposure) and shall s
19、how a Munsell Value for crocking, in accordance with AATCC Color transference chart, not lower than 8.5 (see 4.5). 3.5 Finish. The coating compound shall be an approved acrylic or a urethane-acrylic aqueous polymeric system which is corrective with water repellent Silicons and flame retardant elemen
20、ts. The compound shall be compatible with the base cloth to ensure its proper adherence to the yarns of the base cloth. The coating shall be applied to both the face and back of the base cloth. 3.6 Shrinkage. The finished cloth shall not shrink nor elongate more than 2 percent in the warp and filing
21、 directions when tested in accordance with 4.5. 3.7 Width. The width inclusive of selvage shall be as specified by the contracting activity with a plus or minus tolerance of 2 percent (see 6.2). 3.8 Designs and patterns. The designs and patterns, dyed color or natural, shall be as specified (see 6.2
22、). 3.9 Length and put-up. Unless otherwise specified (see 6.2) cloth shall be in one continuous length of 50 plus or minus 2-1/2 yards, put-up in rolls. 3.10 Physical requirements. The finished cloth shall conform to the requirements specified in table I when tested in accordance with table II. 3.11
23、 Marking. The length of each roll shall be legibly marked with indelible ink on a ticket securely attached to the roll. 3.12 Workmanship. The finished cloth shall conform to the quality established herein. The demerit points per 100 square yards, when calculated as specified herein, shall not exceed
24、 the established maximum point value. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I. Physical requirements. Characteristics Requirements Weight ounce/square yard (minimum) base cloth (minimum) 6.6 (gradsquare meter) finished cloth (maximu
25、m) 8.6 e Yarns per inch (centimeter (cm) (minimum) Warp Riling Breaking strength pounds (newtons) (minimum) Warp Filling Tearing strength pounds (newtons) (minimum) Warp Filling Flame resistance (warp and filling) Flaming time, seconds (maximum) Glow time, seconds (maximum) Char length, inches, cm (
26、maximum) average (minimum) 38 (minimum) 38 (minimum) 250 (minimum) 250 (minimum) 7.86 (35) (minimum) 7.86 (35) (maximum) 2.0 (maximum) 3.0 (maximum) 1.0 Hydrostatic sign (25 16/in2) O leakage Air permeability (maximum) 0.0 Abrasion (minimum cycle) Bar No. 15, 5 Ib flexing bar load, 2.5 Ib Pressure p
27、late load (minimuni warp) SO (minimum filling) 50 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified her
28、ein. 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 requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the ins
29、pections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24757 42 9997906 Oq574bL 2 1 4.1.1 Respon
30、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
31、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
32、ver, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article inspection (see
33、4.3) b. Quality conformance inspection (see 4.4). 4.3 First article inspection. When specified (see 6.2), first article inspection shall consist of the examination and tests specified in 4.5. Samples shall be visually inspected for appearance, color, and finish. 4.4 Quality conformance inspection. S
34、ampling for inspection shall be performed in accordance with MIL-STD-105, except where otherwise indicated (see 6.2). 4.4.1 Examination of end item. Defects found during the examination shall be classified as specified in 4.4.1.1 through 4.4.1.5. 4.4.1.1 Yard-by-yard examination. Each roll in the sa
35、mple shall be examined on face side only. When the total yardage in the roll does not exceed 100 yards (91.4 meters) the entire yardage in the roll shall be examined. When the total yardage in the roll exceeds 100 yards (91.4 meters) only 100 yards (91.4 meters) shall be examined. Defects defined in
36、 accordance with FED-STD-4, which are clearly noticeable at a normal inspection distance of 3 feet (0.91 meter) shall be scored and assigned demerit points as listed in 4.4.1.2 except that only the slubs and knots which exceed the limits shown on Sears Fabric Defect Scale or equal (see 6.6), “D“ for
37、 slubs and “Cf for knots shall be scored. No linear yard (increments of 1 yard (0.91 meter) on the measuring device of the inspection machine) from any one roll within the sample shall be penalized more than 4 points. The sample size shall be in accordance with the following: Lot size (yards) 3,200
38、or less 8 3,201 to 10,000 13 10,001 and over 20 Sample size (roiis)l lno more than one roll shall be taken from any shipping container unless the number of shipping containers in the lot is less than the required number of rolls in which case all shipping containers shall be present in the sample 6
39、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-The lot shall be unacceptable if the points per 100 square yards (83.6 square meters) of the total yardage examined exceeds 50 points. The lot shall be unacceptable if the individual points per 100 squa
40、re yard (83.6 square meters) of two or more individual rolls exceeds 75 points. If one roll exceeds 45 points per 100 square yards (83.6 square meters), a second sample, the same size as the final sample, shall be examined only for individual roll quality examination. The lot shall be unacceptable i
41、f one or more rolls in the second sample exceeds 45 points per 100 square yards (83.6 square meters). Point computation for lot quality and individual roll quality shall be as follows: d) Total points scored in sample x 3600 Contracted width of cloth (inches x total yards inspected = Points per 100
42、square yards (83.6 square meters) 4.4.1.2 Demerit points. Demerit points shall be assigned as follows: For defects 3 inches (7.6 cm) or less in any dimension For defects exceeding 3 inches (7.6 cm) but not exceeding 6 inches (15.2 cm) in any dimension For defects exceeding 6 inches (15.2 cm), but no
43、t exceeding 9 inches (22.0 cm) in any dimension For defects exceeding 9 inches (22.0 cm) in any dimension = one point = two points = three points = four points The following defects, when present in the yard-by-yard and overall examination, shall be scored four points for each yard (0.9 meter) in wh
44、ich they occur: a. b. Width less than specified c. Uneven weaving d. Objectionable odor e. Overall uncleanness or discoloration f. Baggy, ridgy, or wavy cloth character of finish not equal to standard sample of first article when applicable. 4.4.1.3 Examination for length of individual rolls. The in
45、dividual roll shall be examined for gross length and the number of pieces in the roll. Any gross length found to be more than 2 yards below the gross length marked on the ticket or any roll found to contain more than one piece, when applicable, shall be considered a defect with respect to length. Th
46、e unit of product for this examination shall be one roll. The sample unit for this examination shall be one roll (see 4.4.1). 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24757 42 W 7779706 0457463 b W L f 4.4.1.4 Examination for total yar
47、dage in sample. The lot shall be unacceptable if the total of the actual gross lengths of rolls in the sample is less than the total of the gross lengths marked on the roll tickets (see 4.4.1). 4.4.1.5 Examination for compliance with the Textile Fiber Products Identification Act. During the yard-by-
48、yard examination, each piece in the sample shall be examined for compliance with the rules and regulations under the Textile Fiber Products Identification Act. Each piece not labeled in accordance with this act shall be a defect. The lot shall be unacceptable if two or more of these defects occur (s
49、ee 4.4.1). 4.5 Testing of the end item. The methods of testing as specified in accordance with FED-STD-191, whenever applicable and as listed in table II shall be followed. The physical values specified apply to the average of the determinations made on a unit of product from test purposes as specified in the applicable test method. The unit of product for test purposes shall be 2 con- tinuous linear yards, full width of the finished cloth.
