1、MIL-C-LtSE 83 7777706 0371141 3 - MIL-C-498E 27 March 1987 SUPERSEDING MIL-C-498D . 23 June 1982 MILITARY SPECIFICATION CLOTH, PARACHUTE, SYNTHETIC-FIBER (FOR AMMUNITION PARACHUTES) This specification is approved for use by all Departments and Agencies of the Department of Defense. ? 1. SCOPE 4 * 1.
2、1 Scope. This document covers three types of nylon cloth, for the fabrication of ammunition and flare parachutes. % 1.2 Classification. The cloth shall be of the following types (see 6.2): Type D - Nylon (0.88 oz per sq yd) Type G - Nylon (0.88 oz per sq yd) (ordnance) Type H - Nylon (2.20 oz per sq
3、 yd) 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Documents. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specificatio
4、ns and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATION FEDERAL PPP-P-1133 - Packaging of Synthetic Fiber Fabrics Beneficial comments (recommendations, additions, deletions) and any pertinent data-which may be of use in improving this document should be addressed t
5、o: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA 01760-5014, by using the self -addressed Standard i z a t i on Do cumen t Imp r o v eme n t Proposa (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8305 DISTRIBUTION STATEMENT A. Approved fo
6、r public release; distribution is unlimited. THIS DOCUMENT CONTAINS 11 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47E 3 = 9777706 0373342 FI MIL-C-498E STANDARDS FEDERAL FED-STD-191 - Textile Test Methods MILITARY MIL-STD-105 - Samp
7、ling Procedures and Tables for Inspection by Attributes (Copies of documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.1.2 Other Government documents. The following other G
8、overnment documents form a part of this document to the extent specified herein, Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. Rules and Regulations Under the Textile Fiber Products Identification Act (Application for copies should be addressed to t
9、he Federal Trade Commission, Pennsylvania Avenue at Sixth Street, N.W., Washington, DC 20580.) * 2.2 Other publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those l
10、isted 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 issues of the nongovernment documents which are current on the date of the solicitation, AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (A
11、ATCC) AATCC Chromatic Transference Scale (Application for copies should be addressed to the American Association of Textile Chemists and Colorists, P.O. Box 12215, Research Triangle Park, NC 27709 o) (Technical society and technical association documents are generally available for reference from li
12、braries. technical groups and using Federal agencies.) They are also distributed among 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-478E 83 777770b 0373343 m MIL-C-498E 2.3 Order of precedence. In the event of a conflict between the text o
13、f this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Material. (See 6.4.) 3.1.1 Fiber. The nylon yarn use
14、d in the manufacture of the cloth shall be a polyamide prepared from hexamethylene diamine and adipic acid or its derivatives and shall have a minimum melting point of 254OC f 10C when tested as specified in 4.2.3. * 3.1.2 - Yarn. The warp and filling yarns for types D and G shall be 30 denier (nomi
15、nal) multifilament. The warp and filling yarns for type H shall be 70 denier (nominal) multifilament when tested as specified in 4.2.3. 3.1.3 Color. The color of the cloth shall be as specified (see 6.2) and shall match the standard sample (see 6.3). * 3.1.4 Matching. The color of the finished cloth
16、 shall match the standard sample when viewed under filtered tungsten lamps that approximate artificial daylight and that have a correlated color temperature of 7500 i 200 K, with illumination of 100 f 20 foot candles, and shall be a good match to the standard sample under incandescent lamplight at 2
17、300 f 200 K. * 3.1*5 Colorfastness. The color of the finished cloth shall show colorfastness to crocking and water equal to or better than the standard sample. applicable to colorfastness, the color of the finished cloth shall show “good“ colorfastness to water and shall show an AATCC Chromatic Tran
18、sference Scale rating for crocking not lower than 3.5 when tested as specified in 4.2.3. When no standard sample has been established or designated as * 3.2 Physical requirements. The physical requirements of the finished cloth shall be as specified in table I when tested as specified in 4.2.3. 3 Pr
19、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-498E TABLE I. Physical requirements Characteristic Type Type G L/ Type H Weight (ounce per sq yd), max Breaking strength (pounds), min Warp Filling Tearing strength (pounds), min Warp F il 1 ing Elo
20、ngation (percent), min Warp Fil 1 ing Air permeability (CFM of air per square ft of cloth) Yarns per inch Warp Filling 0.88 40 40 2.5 2.5 20 20 300 to 500 L/ 93 f 3 93 f 3 0.88 40 40 2.5 2 e5 20 20 200 to 325 93 f 3 93 f 3 2 20 65 65 5 -0 4.0 - - 40 to 80 104 (min) 91 (min) L/ For signal parachute o
21、rdnance Part No. 8797994 and other applications as may be specified by the responsible authority. 3.2.1 Weave. The weave shall be plain. * 3.2.2 Width. The width of the cloth shall be as specified (see 6.2) and shall be the minimum acceptable width inclusive of the selvage when fly- shuttle looms or
22、 shuttleless with tuck-in selvage are used. For all other shuttleless looms, the width measurement shall be made between the last warp yarn on each side excluding the protruding fringe(s). 3.3 Finish. The cloth shall be scoured to remove sizing and other contaminants. The cloth shall be heat treated
23、 and may be calendered at such temperature and pressure as required to control the air permeability to the level required by this document. i 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-498E 3.3.1 pH. The pH of the water extract of the fi
24、nished cloth shall be not lower than 5.0 and not higher than 8.5 when tested as specified in 4.2.3. 3.3.2 Total nonfibrous. The total sizing, finishing, and other nonfibrous material content of the finished cloth shall not exceed 1.0 percent when tested as specified in 4.2.3. 3.4 Length and put-up.
25、The cloth shall be put up in full width rolls as specified in 5.1, and no roll shall contain more than 3 pieces. * 3.4.1 Types Dy G, and H. Unless otherwise specified (see 6.2), the length of each piece of types D, G, and H cloth shall be not less than 75 yards. 3.5 Fiber identification. Each roll o
26、f cloth shall be labeled or ticketed for fiber content in accordance with the Textile Fiber Products Identification Act. 3.6 Workmanship. The finished cloth shall conform to the quality of product established by this document. The occurrence of defects shall not exceed the applicable quality levels.
27、 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 as specified herein. Except as otherwise specified in the contract or purchase order, the
28、 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 inspections set forth in this document where such inspections are deemed nec
29、essary to assure supplies and services conform 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 document shall become a part of the contractors overall inspection system or quality program. T
30、he absence of any inspection requirement in the document 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 conformance does not authorize submis
31、sion 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-LISBE 83 779770b 03711qb 2 MIL-C-498E 4.1.2 Certificates of c
32、ompliance. When certificates of compliance are submitted, the Government reserves the right to inspect such items to determine the validity of the certification. 4.2 Quality conformance inspection. Unless otherwise specified, sampling for inspection shall be performed in accordance with MIL-STD-105.
33、 4.2.1 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, or qualified in this document or applicable purchase document. 4.2.2 End item ex
34、amination. 4.2.2.1 Yard-by-yard examination. The required yardage of each roll shall be examined, and the defects clearly noticeable at normal inspection distance (3 feet), shall be counted regardless of their proximity to each other. A continuous.defect shall be counted as one defect for each warpw
35、ise yard or fraction thereof in which it occurs. The lot size shall be expressed in units of yards. The sample unit shall be 1 linear yard. The inspection level shall be II and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 4.0. The number of rolls from
36、 which the sample is to be selected shall be in accordance with table II. number of yards shall be examined from each roll sampled. An approximately equal Defect Description Multiple floats Three or more, extending 1/2 inch or more in length. Hole, cut, or tear 1/4 inch or more. I Broken or missing
37、yarn Three or more contiguous, 6 inches or more in length. Spot, stain, or streak Exceeding 3 square inches in area. Open place Stripe of no filling exceeding 1/4 inch in width. Width Less than specified. 4.2.2.2 Examinat ion for labeling of rolls. During the yard-by-yard examination, each roll in t
38、he sample shall be examined for compliance with the Textile Fiber Products Identification Act. The lot shall be unacceptable if two or more rolls in the sample are not labeled or ticketed in accordance with the Rules and Regulations Under the Textile Fiber Products Identification Act. 6 Provided by
39、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-47E 83 m 9977706 0373347 4 m - o e a MIL-C-498E 8 4.2.2.3 Length examination. Each roll of cloth used in the yard-by-yard examination shall be examined for the defects listed below. If the total number of de
40、fects in the sample rolls exceeds the applicable acceptable number specified in table II or if the total of the actual lengths of the sample rolls is less than the total of the lengths marked on the roll tickets, the lot shall be rejected. Defects Any gross length less than the specified minimum len
41、gth Any gross length more than 2 yards less than the gross length marked on Any roll containing more than the specified maximum number of pieces the roll ticket. TABLE II. Lot size and acceptance criteria Lot size Acceptance number 1/ (rolls) 3,200 or less 2 3,201 up to and including 10,000 3 10,001
42、 up to and including 60,000 5 60,001 up to and including 150,000 8 150,001 and over 13 L/ Applicable to length examination only (see 4.2.2.3). 4.2.2.4 Examination for shade. During the yard-by-yard examination, each roll in the sample shall be examined for shade. shade or shaded side to side, side t
43、o center, or end to end shall be cause for rejection of the lot. Any roll in the sample off * 4.2.3 End item testing. The methods of testing specified in FED-STD-191, wherever applicable, and as listed in table III shall be followed. The physical and chemical values specified in Section 3 apply to t
44、he average of the determinations made on a 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 result. units of yards. The sample unit shall be 2 1/2 continuous yards (full width) The lot size
45、 shall.be expressed in 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-498E of the finished cloth. The lot shall be unacceptable if one or more sample units fail to meet any test req irements specified. The number of sample units shall be as
46、follows: Sample size (sample units) Lot size (yards) 800 or less 801 up to and including 22,001 and over 2 3 3 5 TABLE III. End item tests Characteristics Requirement Test paragraph method Mat er ia1 Fiber (nylon) Melting point Yarn 3.1.1 3.1.1 3.1.2 1530 i73.4 Colorfastness to: 3.1.5 3.1.5 5651 563
47、0 Crocking Water 5041 - 21 3.2 Weight Breaking strength I 5100 3.2 Tear i ng s t r eng t h 3.2 5134 5 100 Elongatcon (Types D and G only) 3.2 3.2 3.2 5450 Air permeability 5050 Yarns per inch Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-47E
48、3 7777706 037LL47 MIL-C-498E TABLE III. End item tests - Continued Characteristics Requirement - Test paragraph method Weave PH Total nonfibrous material (percent) 3.2.1 - U 3.3.1 2811 3.3.2 2611 .!L/ A certificate of compliance shall be submitted and will be acceptable for the stated requirements.
49、Except that the results shall be reported to the nearest 0.01 ounce per square yard. 4.2.4 Packaging inspection. The inspection shall be in accordance with the quality assurance provisions of PPP-P-1133. 5. PACKAGING 5.1 Put-up and preservation. Put-up and preservation shall be levelA or Commercial, as specified (see 6.2). * 5.1.1 Levels A and Commercial. The cloth shall be put-up and preserved
