1、INCH-POUND MIL-C-43 7 74C 20 April 1989 SUPERSEDING MIL-C-43774B 31 March 1986 MILITARY SPECIFICATION CLOTH, PLAIN OR PAJAMA CHECK WEAVE, ARAMID This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers aramid,
2、plain or pajama check weave, cloth. 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
3、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). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this do
4、cument should be addressed to: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA 01760-5014 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8305 DISTRIBUTION STATEMENT A
5、. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SPEC IF KATION MIL-C-43774C FEDERAL PPP-P-1133 - Packaging of Synthetic Fiber Fabrics MIL I TARY MIL-T-43636 - Thread, Aramid STANDARDS FED-STD-
6、4 - Glossary of Fabric Imperfections FED-STD-191 - Textile Test Methods (Unless otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, (ATTN: NPODS), 5801 Tabor Avenue, Philadelphia, PA 19120-5099.) 2.1
7、.2 Other Government documents, drawings, and publications. The 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 Rules and
8、Regulations Under the Textile Fiber Products Identification Act (Copies are available from the Federal Trade Commission, Washington, DC 20580-0001.) 2.2 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
9、precedence. Nothing in this document, however, 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 6.31, in accordance with 4.3, 3.2 Standar
10、d sample. The dyed and finished cloth shall match the standard sample for shade and appearance and shall be equal to or better than the standard sample with respect to all characteristics for which the standard sample is referenced (see 6.4). 2 Provided by IHSNot for ResaleNo reproduction or network
11、ing permitted without license from IHS-,-,-MIL-C-43774C * 3.3 Material. It is encouraged that recycled material be used when practical as long as it meets the requirements of this specification. 3.3.1 Fiber. The fiber shall be an approved aramid (see 6.9), 1.5 or 2 denier per filament, cut to a stap
12、le length of 1 1/2 to 2 inches. shall not char at a temperature less than 675OF when tested as specified in 4.4.3. The use of fiber other than the approved is prohibited. The fiber 3.3.2 Yarn. The yarn shall be spun into singles for both the warp and filling (see 6.5). 3.4 Color. The color of the cl
13、oth shall be as specified (see 6.2) and shall match the standard sample. The color shall be obtained by the use of dry spim solution dyed fibers. * 3.4.1 Matching. The color of the finished cloth shall match the standard sample when viewed under filtered tungsten lamps that approximate artificial da
14、ylight having a correlated color temperature of 7500 + 200 K, with illumination of 100 + 20 foot candles, and shall be a good match to the standard sample under incandescent lamplight at 2300 2 200 K. A- 3.4.2 Colorfastness. The dyed and finished cloth shall show fastness to light and to laundering
15、equal to or better than the standard sample or equal to or better than a rating of “good“. Testing shall be as specified in 4.4.3. 3.5 Physical requirements. The physical requirements of the finished cloth shall be as specified in table I when tested as specified in 4.4.3. r , * TABLE I. Physical re
16、quirements Characteristic Requirement Weight per sq yd, minimum (ounces) Yarns per inch, minimum: Warp Fil 1 ing Warp Fil 1 ing Flaming time, maximum (seconds) Glow time, maximum (seconds) Char length, maximum average (inches) Breaking strength, minimum (pounds): Flame resistance: 3.0 80 69 95 80 2.
17、0 25.0 4.0 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ _ _ - _ - - MIL-C-4377YC 3 7799706 03763611 W MIL-(2-43 7 74C 3.5.1 Weave, The weave shall be plain or pajama check. The pajama check weave shall form a uniform corded check pattern. The
18、weave shall repeat on 12 ends and 12 picks. The warp repeat shall be 2 ends weaving as 1 (in an oxford manner), followed by 4 ends weaving in plain weave order. The filling repeat shall be the same order as the warp repeat. 3.5.1.1 Face identification. The face side of the cloth shall be identified
19、by applying a stamping on that side of the cloth with the word “FACE“ at each end of the roll. 3.5.2 Width. The width of the cloth shall be as specified (see 6.2) and shall be the minimum acceptable width inclusive of selvage when fly shuttle looms or shuttleless looms with tuck-in selvage are used.
20、 For all other shuttleless looms, the width measurement shall be made between the last warp yarn on each side excluding the protruding fringe(s). * 3.5.3 Fabric break apen. 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 brea
21、king open, when tested as specified in 4.4.3. This requirement shall not apply. to natural color, undyed aramid. fabric. 3.6 Finishing. The cloth shall be desized, scoured, heat set, and given a durable antistatic finish (see 3.6.1). The cloth shall be heat set to meet the # requirements of 3.6.3 an
22、d 3.8 (see 6.8). 3.6.1 Antistatic finish. The cloth shall be given a durable antistatic finish (see 6.6 and 6.7) so that the maximum surface resistivity of any one specimen before laundering shall be 3.0 x 10l1 ohms per square, and the maximum surface resistivity of any one specimen after five laund
23、erings shall be 8 x 10l1 ohms per square when tested as specified in 4.4.3. Only those chemical treatments already approved by the appropriate medical service and so listed herein (see 6.71, or in the invitation for bids or request for proposal, shall be considered acceptable for the related acquisi
24、tion. 3.6.2 Nonfibrous material. Prior to the application of the finish, the cloth shall contain no more than 1.0 percent starch and protein including chloroform- soluble and water-soluble material when tested as specified in 4.4.3. 3.6.3 Curling. The finished cloth shall lie flat, without distortio
25、n, and shall show no evidence of curling when tested as specified in 4.4.3. 3.7 pH. The pH value of the water extract of the finished cloth shall be not less than 4.0 nor more than 8.0 when tested as specified in 4.4.3. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
26、icense from IHS-,-,-MIL-C-43774C 3.8 Dimensional stability. The shrinkage or elongation both in the warp and in the filling shall not be greater than 3.5 percent for the individual sample unit and not greater than 3.0 percent for the lot average when tested as specified in 4.4.3. nane or trademark o
27、n either the cloth, the ticket, or the package. The preshrinkage process used shall not be identified by 3.9 Seam efficiency. The finished cloth shall have a seam efficiency of not less than 80 percent when tested as specified in 4.4.3. 3.10 Length and put-up. Unless otherwise specified (see 6.2), t
28、he finished cloth shall be furnished in continuous lengths each not less than 40 yards. The cloth shall be put up in full width rolls as specified in 5.1. 3.11 Fiber identification. Each roll of cloth shall be labeled or ticketed for fiber content in accordance with the Rules and Regulations Under t
29、he Textile Fiber Products Identification Act. 3.12 WorkmanshiE. The finished cloth shall conform to the quality of product established by this document and the demerit points per 100 square yards shall not exceed the specified point values. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for insp
30、ection. 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 herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any
31、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 inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and
32、services conform to prescribed requirements. * 4.1.1 Responsibility for compliance. All items shall meet all requirements of sections 3 and 5. become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not reli
33、eve the 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 manufacturing operations, is an acceptable practice to ascertain conformance to requirements, ho
34、wever, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. The inspection set forth in this specification shall 4.1.2 Certificates of compliance. When certificates of compliance are submitted, the
35、 Government reserves the right to inspect such items to determine the validity of the certification. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* -. _ -I_ - _- MIL-C-43774C 83 W 7977706 039bLbb L W MIL-C-43774C ,2 Classification of inspections
36、. The inspection r herein are classified as follows: irem nts sp rified a. b. First article inspection (see 4.3) Quality conformance inspection (see 4.4) * 4.3 First article inspection. When a first article is required (see 3.1 and 6.2) it shall be examined for the defects specified in 4.4.2.1 throu
37、gh 4.4.2.4 and tested as specified in 4.4.3. 4.4 Quality conformance inspection. 4.4.1 Component and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance with all the requirements of referenced documents unless otherwise excluded, amended, modified,
38、or qualified in this specification or applicable purchase document. 4.4.2 End item visual examination. 4.4.2.1 Yard-by-yard examination. Each roll in the sample shall be examined on the face side only. When the total yardage in the roll does not exceed 100 yards, the entire yardage in the roll shall
39、 be examined. When the total yardage in the roll exceeds 100 yards, only 100 yards shall be examined on the face side only. All defects as defined in section III of FED-STD-4 that are clearly noticeable at normal inspection distance (3 feet) shall be scored and assigned demerit points as listed in 4
40、.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 resulting from wrong ply, variation of twist in the yarn or off shade yarn. c. Only knots and slubs that exceed limits shown in figure 1 of F
41、ED-STD-4 shall be scored. No linear yard (increments of 1 yard 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 from 20 containers. The lot shall be unacceptable if the points p
42、er 100 square yards of the total yardage examined exceeds 50 points. The lot shall be unacceptable if the points per 100 square yards of two or more individual rolls exceeds 75 points. If one roll exceeds 75 points per 100 square yards, a second sample of 20 rolls shall be examined only for individu
43、al roll quality examination. The lot shall be unacceptable if one or more rolls in the second sample exceeds 75 points per 100 square yards. shall be as follows: Point computation for lot quality and individual roll quality 6 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
44、ut license from IHS-,-,-MIL-C-43 774C Total points scored in sample x 3600 = Points per 100 Contracted width of cloth (inches) x Total yards inspected square yards 4.4.2.1.1 Demerit points. Demerit points shall be assigned as follows: For defects 3 inches or less in any dimension - one point For def
45、ects exceeding 3 inches, but not exceeding 6 inches, in any dimension - two points For defects exceeding 6 inches, but not exceeding 9 inches, in any dimension - three points For defects exceeding 9 inches in any dimension- four points The following defects, when present, shall be scored four points
46、 for each yard in which they occur: Baggy, ridgy, or wavy cloth Width less than specified Uneven weaving 4.4.2.2 Length examination. During the yard-by-yard examination, each roll in the sample shall be examined for length. Any length found to be less than the minimum specified or more than 2 yards
47、less than the length marked on the ticket shall be considered a defect with respect to length. The lot shall be unacceptable if two or more rolls in the sample are defective in respect to length or if the total of the actual lengths of rolls in the sample is less than the total of the lengths marked
48、 on the ticket. O 4.4.2.3 Roll identification examination. During the yard-by-yard examination, each roll in the sample shall be examined for identification defects. The lot shall be unacceptable if two or more rolls in the sample are not labeled or ticketed in accordance with the Textile Fiber Prod
49、ucts Identification Act, or if the face stamping is missing from either or both ends, or if the face stamping is on the wrong side. 4.4.2.4 Shade and appearance examination. During the yard-by-yard examination, each roll in the sample shall be examined for shade and appearance. if any roll in the sample is off shade, shaded side to side, shaded side to center, or shaded end to end, or if any roll does not have the same appearance as the standard
