1、NIL-C-29931 83 W 999990b 0384800 5 MIL-C-249 3 1 1s July 1987 MILLTARY SPECIF CATION CLOTH, PLAIN WEAVE, ARAMID, WATER REPELLENT This specification is approved for use by ali Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for a p
2、lain weave aramid cloth that is water repellent treated. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The f o1 1 owing specifications, standards, and handbooks form a part of this cpecif ication to the extent specified herein. Unless otherwise spe
3、cified, the issues o these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL PPP-P-1133 - Packaging of Synthetic Fiber Fabrics MILITARY MIL-T-43548 - Threa
4、d, Polyester Core: Cotton-, Rayon-, or Polyester Covered Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Officer in Charge, Navy Clothing and Textile Research Facility, 21 Strathmore Road, Natic
5、k, MA 01760-2490 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 8305 DISTRIBUTION STATEMENT A. Approved for public release, distribution is unlimited. THIS DOCUMENT CONTAINS /d PAGES. Provided
6、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_I _ MIL-C-24731 83 = 9777706 0384801 7 MIL-C-24931 STAN DARDS PEDERAL FED-STD-4 - Glossary of Fabric Imperfections FED-STD-19 1 - Textile Test Methods MIL LTAKY MIL-STD-105 - Sampling Procedures and Tables for
7、Inspection by Attributes (Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer .) 2.1.2 Other Government documents, drawings,
8、and publications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. LAWS AND REGULATIONS . Rules and *Regulations Unde
9、r the Textile Fiber Products Identification Act . (Copies may be obtained from the Federal Trade, Commission, Washington, DC 20580. ) 2.2 Other publications. The following document(s) form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the docu
10、ments which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date of the sol ici t at ion. TECHNICAL M
11、ANUAL OF THE AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS Met hod No. 8 Colorfastness to Crocking : AATCC Crockmeter Method (Copies may obtained from AATCC National Headquarters, P.O. Box 12215, Research Triangle Park.) 2.3 Order of precedence. In the event of a conflict between the text o
12、f this specification and the references cited herein, the text of this specification shall take precedence. Nothing in this specification however, shall supersede applicable laws and regulations unless a specific exemption .has been obtained. Provided by IHSNot for ResaleNo reproduction or networkin
13、g permitted without license from IHS-,-,-t* -9 MIL-C-24931 83 m 9999906 0384802 9 = MIL-C-24931 3.4.1 Matching. The color and appearance of the dyed and finished cloth shall match the standard sample when viewed under filtered tungsten lamps which approximate artificial daylight having a correlated
14、color temperature of 7500 + 200 K, with illumination of 100 + 20 foot candles, and shall be a good matchto the standard sample under incandescent lamplight at 2300 - + 200 K. 3. REQUIREMENTS 3.1 Standard sample. The finished cloth shall match the standard and shall be equal to or better than the sta
15、ndard sample with respect to all characteristics for which the standard sample is referenced (see b.3). The standard sample is identified under piece number 87177. 3.2 First article. When Specified, the contractor shall furnish sample unit(s) or first article inspection and approval (see 43 and 6.2)
16、. 3.3 Material. 3.3.1 Fiber. The fiber shall be an approved aramid blend (see 6.8), 1.5 denier per filament, cut to a staple length of 1-1/2 to 2 inches (3.80 to 5.10 cm). The fiber shall not char at a temperature less than 675F (375OC). The use of fiber other than the approved is prohibited. The fi
17、ber shall be tested as specified in 4.5. 3.3.2 Yarn. The yarn shall be 2-ply for the warp and filling (see 6.4), when tested as specified in 4.5. 3.4 Color. The color of the cloth shall be blue 3380 and shall match the standard sample, unless otherwise specified (see 6.2). The color shall be obtaine
18、d by the use of producer colored fiber. 3.4.2 Colorfastness. The finished cloth shall show colorfastness to light, laundering, wet dry cleaning, perspiration and crocking equal to or better than the standard sample when tested as specified in 4.5. When no standard sample is available or when the sta
19、ndard sample is not referenced for colorfastness, the finished cloth shall show “Good“ fastness to laundering, wet dry cleaning, perspiration, and shall show “Good“ fastness to light evaluated after 6 hours of exposure, and a wet and dry crocking rating not lower than 4. 3.5 Physical requirements. T
20、he physical requirements of the finished cloth shall be as specified in Table I when tested as specified in 4.5. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24931 83 m 99qqOb 0384803 O m MIL-C-24931 TABLE I. Physical requirements Characte
21、ristics Requirements Minimum Max i mum 6.5 (220.4) 7.5 (254.2) Weight, oz/yd2 (gm/m 2 ) Yarns per inch (2.54 cm) - Warp 62 Fi 11 ing 46 Warp 260 (1157) - - Break strength, lbs (N) Filling 200 (890) - Warp 10 (44.5) - After flame time, seconds - 2.0 Tear strength, lbs (N) Filling 7 (31.2) - Flame res
22、istance: After glow time, seconds - 25.0 - 3.5 Char length, inches (2.54 c ) Initial - 7 (3.56) After 15 launderings - 12 (6.10) 2 Air permeability, ft3/min/ft Y3 (cm /sec/cm ) Hydrostatic pressure, inches (2.54 cm) - Initial, and after 3 launderings 8, 3.6. Weave. The weave shall be plain, when tes
23、ted as specified in 4.5. 3.7 Width. The width of the cloth shall be as specified (see 6.2) and shall be the minimum acceptable width, inclusive of selvages when fly shuttle looms. or shuttleless with tuck-in selvage looms are used. For all other shuttleless looms the width measurement shall be made
24、between the last warp yarn on each side excluding the protruding fringe. 3.8 Fabric break open. The flame from a meker burner shall not pass from the flame contact side to the other side of the fabric due to the fabric breaking open, when tested as specified in 4.5. 3.9 Finishing. The clo.th shall b
25、e desized, scoured, heat set (see 6.6) and given an approved water repellent treatment. 3.9.1 Water repellent treatment. The cloth shall be given an approved fluorocarbon water repellent treatment (see 6.5). 3.9.2 Nonfibrous material. Prior to application of the water repellent treatment, the cloth
26、shall contain no more than 1.0 percent starch and protein including chlor of o rm-sol ubl e and wat er-sol ubl e material when tested as specified in 4.5. 3.10 - Spray rating. The results of three individual determinations on the sample unit for spray rating shall be equal to or better than 80, 80,
27、80 when tested as specified in 4.5. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24931 3.11 Curling. The finished cloth shall lie flat, without distortion, and show no evidence of curling when tested as specified in 4.5. 3.12 pH. The pH va
28、lue of the water extract of the finished cloth shall be - not less than 5.0 nor more than 8.0 when tested as specified in 4.5. 3.13 Dimensional stability. The finished cloth shall not shrink or elongate more than 4.0 percent in the direction of the warp nor more than 2.0 in the direction of the fill
29、ing, after 15 launderings when tested as specified in 4.5. 3.14 Seam efficiency. The finished cloth sha1.i have a seam efficiency of not less than 80 percent when tested as specified in 4.5. 3.15 Length and put-up. Unless otherwise specified (see 6.2), the finished cloth shall be furnished in contin
30、uous lengths each not less than 40 yards (36.581). Each length shall be put-up in full width rolls as specified in 5.1. 3.16 Face identification. The face side of the cloth shall be identified by applying a stamping on that side of the cloth with the word “Face“ at each end of the roll. 3.17 Fiber i
31、dentification. Each roll of cloth shall be labeled, or ticketed, for fiber content in accordance with the Rules and Regulations Under the Textile Fiber Products Identification Act, 3.18 Wor kmanshi p, The finished cloth shall conform to the quality established by this document. The occurrence of def
32、ects shall not exceed the point: 1 eve1 specified. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the
33、 contract or order, the contractor may use his own or any other facilities suitable for performance of the inspection requirements 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 ins
34、pections are deemed necessary to assure supplies and services conf.orm to prescribed requirements. 4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection s
35、ystem or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conf
36、ormance does not authorize submission of known defective material , either indicated or actual, nor does it commit the Government to acceptance of defective material. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _ MIL-C-24931 83 99b 0384805 4 M
37、IL-C-2493 1 4.1 .L Certificate of compliance. Where certificates of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. 4.2 Classification of inspection. The inspection requirements specified herein are classified as fo
38、llows: 1. .First article inspection (see 4.3). 2. Quality conformance inspection (see 4.4). 4.3 First article inspection. When required (see 3.2 and 6.2), the first article shall be visually examined for appearance, color, and finish, and shall be tested for physical and chemical properties in accor
39、dance with the methods specified in 4.5. The presence of any defect or failure of any test shall be cause of rejection of the first article. 4.4 Quality conformance inspection. Sampling for inspection shall be performed in accordance with MIL-STD-105, except where otherwise indicated. 4.4.1 Componen
40、t and material inspection. In accordance with 4.1 above, components and materials shall be tested and inspected in accordance with all the requirements of referenced specifications, drawings , and standards unless otherwise excluded, amended, modified, or qualified in this specification or applicabl
41、e procurement documents. 4.4.2 Examination of the end item. Examination of the end item shall be in accordance with 4.4.2.1 through 4.4.2.4. 4.4.2.1 Yard-by-yard examination. The required yardage of each roll in the sample shall be examined on the face side only. When the total yardage in the roll d
42、oes not exceed 100 yards (91.4m), the entire yardage in the roll shall be examined. When total yardage in the roll exceeds 100 yards (91.4m), only 100 yards (91.4m) shall be examined. All defects as defined in Section III of FED-STD-4 which are clearly noticeable at normal inspection distance (3 fee
43、t) (0.91m) shall be scored and assigned demerit points as listed in 4.4.2.1.1 except as follows : a. Only coarse yarns that exceed twice the normal yarn diameter shall be scored. b. Mixed filling (shade bar) shall be scored only when resulting from wrong ply, variation of twist in the yarn, or off s
44、hade yarn. c. Only knots and slubs which exceed limits shown on Sears Fabric Defect Scales (see 6.7) F or 2 as applicable for slubs and D for knots shall be scored. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-2Ll73L 83 m 7777906 0384806 h
45、 m MIL-C-24931 No linear yard (increment of 1 yard (0.9m) on the measuring device of the inspection machine) from any one roll within the sample shall be penalized more than four points. The sample size shall be 20 rolls selected for 20 containers. The lot shall be unacceptable if the points per 100
46、 square yards (83.61 ) of the total yardage examined exceed 50 points. The lot shall be unacceptable if the points per 100 square yards (83.6 ) of two or more individual rolls exceeds 75 points. If one roll exceeds 75 points per 100 square yards (83.6m ), a second sample of 20 rolls shall be examine
47、d only for individual roll. quality. The lot shall be unacceptable if one or ore rolls in the second sample exceeds 75 points per 100 square yards (83.6m ). Point computation for lot quality and individual roll quality shall be as follows: 2 2 2 P Total points scored in sample X 3600 = Points per 10
48、0 Contracted width of cloth (inches) X Total yards inspected square yards (83. 6m2) 4.4.2.1.1 Demerit points. Demerit points shall be assigned as follows: For defects 3 inches (7.6 cm) or less - one point For defects exceeding 3 inches (7.6 cm) but not exceeding 6 inches (15.2 CM) in any dimension F
49、or defects exceeding 6 inches (15.2 cm) but not exceeding 9 inches (22.9 cm) in any dimension - two points - three points For defects exceeding 9 inches (22.9 cm) in any dimension - four points The following defects, when present, shall be scored four points for each yard in which they occur: Baggy, ridgy, or wavy cloth Width less than specified Uneven weaving 4.4.2.2 Examination for length. 4.4.2.2.1 Individual rolls. During the yard-by-yard
