1、MIL-C-44396(GL) 6 February i990 MILITARY SPECIFICATION CLOTH, TWILL, PARA-ARAMID This specification is approved for use by the Natick Research, Development and Engineering Center, Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE
2、1.1 Scope. This specification covers one type of para-aramid twill weave cloth. 2. APPLICABLE DOCUMENTS 2-1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following cpecifi- cations, standards, and handbooks form a part of this document to the extent specified herein. Unle
3、ss 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). a SPECIFICATIONS FEDERAL PPP-P-1133 - Eackaging of Synthetic Fiber Fabrics MI L
4、 ITARY MIL-T-87128 - Thread, Para-Aramid, Intermediate Modulus Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Natick Research, Development, and Engineering Center Natick, MA 01760-501
5、4 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. Approved for public release; distribution is unlimited. t Provided by IHSNot for ResaleNo reproduction or network
6、ing permitted without license from IHS-,-,-STANDARDS FEDERAL FED-STD-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 Standardization Documents Order Des
7、k, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 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 th
8、ose cited in the solicitation, FEDERAL TRADE COMMISSION Rules and Regulations Under the Textile Fiber Products Identification Act (Copies are available from the Federal Trade Commission, Pennsylvania Avenue at Sixth Street, N.W., Washington, DC 20580-0001.) 2.2 Non-Government publications. The follo
9、wing document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODIS
10、S are the issues of the documents cited in the solicitation (see 6.2). AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) Chromatic Transference Scale (Application for copies should be addressed to the American Association of Textile Chemists and Colorists, P.O. Box 12215, Research Trian
11、gle Park, NC 27709-2215, ) AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 2261 - Tearing Strength of Woven Fabrics by the Tongue (Single Rip) Method (Constant-Rate-of-Extension Tensile Testing Machine) (Application for copies should be addressed to the American Society for Testing and Materials
12、, 1916 Race Street, Philadelphia, PA 19103-1187.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-4437b 3 779790b 03bbb47 3 = (Non-Government standards and other publications are normally available from the organizations that prepare or distr
13、ibute the documents. may be available in or through libraries or other informational services.) These documents also 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 docu
14、ment, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. I 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.3) in accordance with 4.3. 3.2 Standard sample. The finished cloth sh
15、all 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). 3.3 Material. (See 6.5) 3.3.1 - Yarn. The yarn shall be composed of para-aramid fiber, and spun i
16、nto 2-ply yarn for both the warp and the filling. 3.4 - Color. The color of the finished cloth shall be green matching the Government furnished standard sample. 3.4.1 Matching. The color of the finished cloth shall match the standard sample when viewed under filtered tungsten lamps that approximate
17、artificial daylight and that have a correlated color temperature of 7500 2 200 OK, with illumination of 100 + 20 foot candles, and shall be a good match to the standard sample under incandescent lamplight at 2300 - -+ 200 OK. 3.4.2 Colorfastness. The finished cloth shall show fastness to laundering,
18、 light, and perspiration equal to or better than the standard sample or equal to or better than a rating of “good“. The finished cloth shall show fastness to crocking equal to oc better than the standard sample or shall have an k4TCC Chromatic Transference Scale rating of not lower than 3.5. specifi
19、ed in 4.4.3. Testing shall be as 3.5 Physical requirements. The physical requirements for the finished cloth shall be as specified in table I when tested as specified in 4.4.3. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-44396 3 W 9999906
20、 0366650 T W -s - TABLE I. Physical requirements Requirement Characteristic Min Max Weight, oz./sq. yd. Yarns per inch Warp Fi ling Air permeabi 1 ity , f t 3/min. / f t . Breaking strength, pounds Warp Fi 11 ing Tearing strength, pounds Warp Filling 7.8 8.3 15 65 3.5.1 Weave, 3.5.2 Width. The width
21、 of the finished clothshall be as specified (see 6.2) The weave shall be a 2/1 right hand twill. and shall be the minimum acceptable width inclusive of the selvage when fly- shuttle looms or shuttleless looms with a tuck-in selvage are used. For all other shuttleless looms, the width measurement sha
22、ll be made between the last warp yarn on each side excluding the protruding fringe(s). 3.6 Finish. The cloth shall be desizedand scoured. 3.7 Nonfibrous material, The total chloroform soluble and water soluble material content of the scoured cloth shall not exceed 1.0 percent when tested as specifie
23、d in 4.4.3. 3.8 pH. The pH value of the water extract of the finished cloth shall be no less than 4.0 nor more than 8.0 when test,ed as specified in 4.4.3. 3.9 Curling. The finished cloth shall lie flat without distortion and show no evidence of curling when tested as specified in 4.4.3. 3.10 Dimens
24、ional stability. The cloth shall not shrink or elongate more than 2.0 percent in either the warp or filling direction when tested as specified in 4.4.3. 3.11 Seam efficiency. The finished cloth shall have a seam efficiency of not less than 70 percent when tested as specified in 4.4.3. 4 Provided by
25、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.12 Length and put-up. For Government procurement only, unless otherwise specified (see 6.2), the cloth shall be furnished in continuous lengths, each not less than 40 yards. The cloth shall be put-up on rolls as
26、specified in 5.1, 3.13 Face identification. The face of the cloth shall be the warp effect side, each end of the roll. The face of the cloth shall be identified by stamping the word “FACE“ at I 3.14 Fiber identification. Each roll shall be labeled or ticketed for fiber content in accordance with the
27、 Rules and Regulations Under the Textile Fiber Products Identification Act, 3.15 WorkmanshiE. The finished cloth shall conform to the quality of product established by this specification. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or
28、 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 other facilities suitable for the performance of the
29、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 services conform to prescribed requirements. 4.1.1 Re
30、sponsibility for compl-ianc. 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 reliev
31、e 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 manufactuking 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. 4.1.2 Certificates of compliance. When certificates of compliance are submitted, the Government reserves the right to inspect such items to
33、 determine the validity of the certification, 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Quality conformance inspection (see 4.4). 5 Provided by IHSNot for ResaleNo reproduction or networking pe
34、rmitted without license from IHS-,-,-. 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 through 4.4.2.4 arid tested for the characteristics specified in 4.4.3. 4.4 Quality conformance inspection. 4.4.1 Component
35、 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, or qualified in this specification or applicable purchase document. 4.4.2 End item visual examin
36、ation. 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 be examined. When the total yardage in the roll exceeds 100 yards, only 100 yards shall be exam
37、ined 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 4.4.2.1.1 except as follows: a. Only coarse yarns that exceed twice the normal yarn diameter shal
38、l be scored. b. Mixed filling (shade bar) shall be scored only when resulting from wrong ply, variation of twist in the yarn, or off shade yarn. c. Only knots and clubs that exceed limits shown in figure 1 of FED-STD-4 shall be scored. No linear yard (increments of 1 yard on the measuring device of
39、the inspection machine) from any one roll within the same 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 per i00 square yards of the total yardage examined exceeds 50 points. The lot shall be unacce
40、ptable 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 individual roll quality examination. The lotshall be unacceptable if one or more rolls in the second
41、 sample exceeds 75 points per 100 square yards. Point computation for lot quality and individual roll quality shall be as follows: Total points scored in sample x 3600 = Points per 100 Contracted width of cloth (inches) x Total yards inspected square yards Provided by IHSNot for ResaleNo reproductio
42、n or networking permitted without license from IHS-,-,-_ MIL-C-49396 3 m 79997Ob 03bbb53 5 MIL-C-44396(GL) . 4.4.2.1.1 Demerit points. Demerit points shall be assigned as follows: e For defects 3 inches or less in any dimension - one point For defects exceeding 3 inches, but not exceeding 6 inches,
43、in any diinension - 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 for each yard in which they occur: Baggy, ridgy, o
44、r wavy cloth Width less than specified Uneven weaving 4.4.2.2 Shade and appearance examination. During the yard-by-yard examin- ation, 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
45、 to end, or if any rolldoes not have the same appearance as the standard sample, it shall be cause for rejection of the entire lot represented by the sample, 4.4.2.3 Length examination. During the yard-by-yard examination, each roll in the sample shall be examined for length. Any length found to be
46、less than the minimum specified or more than 2 yards 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 rlls in the sample are defective with respect to length or if the total of the actual lengths of rolls in t
47、he sample is less than the total of lengths marked on the ticket. 4.4.2.4 Roll identification examination. During the yard-by-yard examin- ation, each roll in the sample shall be examined for identification defects. The lot shall be unacceptable labeled or ticketed in accordance with The Textile Fib
48、er Products Identification Act, or if the face stamping is missing from either or both ends, or if the face stamping is on the wrong side. if two or more rolls in the sample are not 4.4.3 End item testing. The cloth shall be tested for the characteristics listed in table II, The methods of testing s
49、pecified in FED-STD-191, wherever applicable, and as listed in table II shall be followed. The physical and chemical values specified in Section 3 apply to the determinations made on the sample unit for test purposes as specified in the applicable test method. All test reports shall.contain the individual values utilized in expressing the final results. The sample unit shall be 5 yards full width. The lot shall be unacceptable if one or more sample
