1、I I-* MIL-C-2494b 3 m 9997906 038517b T y I - H-37-07 MIL-C-24946 13 June 1988 MILITARY SPECIFICATION CLOTH, TWILL, COTTON (FLAME RETARDANT TREATED) This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one
2、type of cotton twill cloth which has been treated with a flame retardant finish. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the issue listed in that issue of t
3、he Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation form a part of this specification to the extent specified. SPECIFICATIONS FE DE RAI, V-T-276 - Thread, Cotton PPP-P-1134 - Packaging, Packing of Cotton and Cotton-Synthetic Fiber-Blend Fabrics (Excl
4、uding Duck Fabrics) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Qfficer in Charge, Navy Clothing and Textile Research Facility, 21 Strathmore Road, Natick, MA U1760 by using the self-address
5、ed standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AEfSC NA FSC 8305 DISTRIBUTION STATEMENT A. Approved for public release, distribution is un1 imi ted. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
6、se from IHS-,-,-_- -_I- - MIL-C-24946 3 7777706 0385277 L MIL-C-24946 STANDARDS FEDERAL FED-STD-191 - Textile Test Methods PED-STD-4 - Glossary of Fabric Imperfections MIL ITARY MIL-STD-105 - Sampling Procedures and Tables for Inspections by At tri butes (Copies of specifications, standards, drawing
7、s, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting off icer .) 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings,
8、 and publications form a part of this Specification to the extent specified herein. LAWS AND REGULATIONS Rules and Regulations Under the Textile Fiber Products Identification Act (Copies may be obtained without charge from the Federal Trade Commission, Washington, DC 20580). 2.2 Other publications.
9、The following document(s) form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODLSS specified in the solicitation. Unless otherwise specified, the issues of document
10、s not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date of the soli ci tat ion. AMERICAN SOCIETY FOR TESTING AND MATERIALS ASTM 1424-83 - Tear Resistace of Woven Fabrics by Falling Pendulum (Elmendorf) Apparatus (Applications for copies should be add
11、ressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187). TECHNICAL MANUAL OF THE AMERICAN ASSOCIATION OF CHEMISTS AND COLORISTS Method No. 8 Colorfastness to Crocking: Crocheter Method (Application for copies should be addressed to the AATCC National
12、Headquarters, P.O. Box 12215, Research Triangle Park, NC 27709). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24946 - 83 70b 0385178 3 M MIL-C-24946 2.3 Order of precedence. In the event of a conflict between the text of this specification a
13、nd 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. 3. REQUIREMENTS 3.1 Standard sample. The finished cloth shall match the standar
14、d sample for shade and shall be equal to or better than the standard sample with respect to all characteristics for which the standard sample is referenced (see 6.3). The standard sample is identified under piece no. 88131. 3.2 Formula approval. The prospective contractor or his finishing plant shal
15、l submit with his bid to the contracting officer for approval, a list of materials which will be used if contract is awarded. The list shall stipulate amounts, grades, and standards for all materials including solvents, and the manufacturers name. This list is for the information of the Government a
16、nd is not to be disseminated to the public. Approval of the quantitative formula submitted shall in no way absolve the contractor from complying with the performance requirements of this specification. 3.3 First article. When specified (see 4.3 and 6.2), the contractor shall furnish a sample for fir
17、st article inspection and approval. 3.4 Material. O 3.4.1 Yarn. Warp and filling shall be single yarns made from carded cotton (see 4.4.1 and 4.5). 3.5 Weave. The weave shall be a 3 up - 1 down left hand twill (see 4.5). 3.6 Preparation. The cloth shall be singed, desized, and mercerized (see 4.4.1
18、and 4.5). 3.7 Color. The color shall be Navy shade Blue 3384 and shall match the standard sample. 3.7.1 Matching. The color of the cloth shall match the standard sample when viewed under filtered tungsten lamps which approximate artificial daylight having a correlated color temperature at 7500 (+200
19、) Kelvin with an illumination of 100 (+20) foot candles, and shall be a good match to the standard sample under incandescent lamplight at 2300 (+200) Kelvin. - 3.7.2 Colorfastness. The finished cloth shall show colorfastness to light (40SFH), perspiration, crocking, and laundering equal to or better
20、 than the standard sample when tested as specified in 4.5. As a limit of acceptability, or when no standard sample is available, the finished cloth shall show a minimum of “good“ colorfastness to light (40SFH), laundering and perspiration, and 4 for dry crocking and 2 for wet crocking when tested as
21、 specified in 4.5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-24346 3 MIL-C-24946 3.8 Physical requirements. The finished cloth shall conform to the physical requirements shown in Table I when tested as specified in 4.5. Table I - Physical
22、 Requirements Characteristics Requirements Weight - oz/yd2 (g/m ) Des i zed Finished 2 Mi ni mum 4.6 (156) 6.0 (203) Maximum 5.2 (176) 7.3 (247) Warp 90 Fi 11 ing 42 Yarns per inch (2.54 cm) - Minimum Breaking ctength - lbs (Newtons) Minimum Warp 100 (445) Fi 11 ing 45 (200) Tearing strength - lbs (
23、Newtons) Minimum Warp 7.0 (31) Filling 4.0 (18) Warp 0.010 (0.00113) 0.005 (0.00057) Fi 11 ing Minimum 20 (10.16) Stiffness in. lbs (N.m) Maximum O 3 2 Air permeability ft /min/ft2 (cm3/sec/cm ) 3.8.1 Width. The width of the finished cloth shall be as specified (see 6.2) and shall be the minimum acc
24、eptable 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 between the last warp yarn on each side excluding the protruding fringe. 3.9 Seam efficiency. The cloth shall have a sea
25、m efficiency of not less than 80 percent when tested as specified in 4.5. 3.10 Dimensional stability. The finished cloth shall not shrink nor elongate more than 2.0% in either the warp or filling when tested as specified in 4.5. The pre-shrinking process used shall not be identified by name or by tr
26、ademark, either on the cloth, ticket, or package. 3.11 Treatment. The cloth shall be given an approved flame resistant treatment (see 6.5 and 6.6). The finished cloth shall have an average time of after flame of not more than 2.0 seconds, not more than 5.0 seconds average after-glow time and an aver
27、age length of char of not more than 5.0 inches (12,5cm), both initially and after 25 launderings when tested as specified in 4.5. 3.12 pH. The pH value of the water extract of the finished cloth shall be - no less than 5.0 nor more than 8.5 when tested as specified in 4.5. Provided by IHSNot for Res
28、aleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-24946 3 W MIL-(2-24946 3.13 Non-fibrous material. The cloth, prior to treatment, shall contain no more than 2.0 percent starch and protein content including chloroform-soluble and water-soluble material, when tested as sp
29、ecified in 4.5. 3.14 Toxicity approval. Only those flame retardant treatments already evaluated and approved by the appropriate medical service in regards to toxicity and so listed in the invitation for bids or request for proposal shall be considered acceptable for the related procurement (see 6.5)
30、. 3.15 Length and put-up. Unless otherwise specified (see 6.2), the cloth shall be furnished in continuous lengths, each not less than 40 yards (36m). Each length shall be put-up in a roll as specified in PPP-P-1134. 3.16 Face identification. The face side of the cloth shall be identified by stampin
31、g “FACE“ on that side of the cloth at each end of the piece and roll. 3.17 Fiber identification. Each piece shall be labeled or ticketed for fiber content in accordance with the Rules and Regulations under the Textile Fiber Products Identification Act. 3.18 Workmanship. The finished cloth shall conf
32、orm to the quality established by this specification. The occurrence of defects shall not exceed the applicable quality/point level specified. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performa
33、nce of all inspection requirements as specified herein. Except as otherwise specified in the 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 reserv
34、es the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary 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
35、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 the contractor of the responsibility of assuring that all products or supplies submitted to the Gover
36、nment for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4.1.2 Certificate of compliance. Where cert
37、ificates of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. -_ I _- - _ - - _- x_- MIL-C-Zq94b 83 m 79999Ob 03852
38、02 T m MIL-C-24946 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: 1. First article inspection (see 4.3). 2. Quality conformance inspection (see 4.4). 4.3 First article inspection. When required (see 6.2), the first article of finished cloth
39、submitted in accordance with 3.3 shall be visually inspected for color, and finished appearance, and shall be tested for chemical and physical properties in accordance with methods specified in 4.5. 4.4 Quality conformance inspection. Sampling for inspection shall be performed in accordance with MIL
40、-STD-105, except where otherwise indicated. 4.4.1 Component and material inspection. In accordance with 4.1 above, components and materials shall be tested in accordance with all the requirements of referenced specifications, drawings, and standards unless otherwise excluded, amended, modified, or q
41、ualified in this specification or applicable procurement documents. A certificate of compliance may be submitted for the requirements of fiber identification of 3.4.1 and the preparation requirements of 3.6. 4.4.2 Examination of the end item. Examination of the end item shall be in accordance with 4
42、.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 face side only. When the total yardage in the roll does not exceed 100 yards (91.4m) the entire yardage in the roll shall be examined. When the total yardage in the roll exc
43、eeds 100 yards (91.4m), only 100 yards (91.4m) shall be examined. All defects are defined in Section 1 of FED-STD-4, which are clearly noticeable at normal inspection distance (3 feet) (0.91m) shall be scored and assigned demerit points as llsted in 4.4.2.1.1, except that only the clubs and knots wh
44、ich exceed the limits shown on Sears Fabric Defect Scale (see 6.4), “D“ or “3 1/2“ for clubs and “C“ for knots shall be scored. No linear yard (increments of 1 yard (0.91m) on the measuring device of the inspection machine) from any one roll within the sample shall be penalized more than 4 points. T
45、he sample size shall be in accordance with the following : 6 - - _ - - /- 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M IL-C-24946 Sample Size (roils) i/ - Lot Size (yards) 3200 or less 3201 thru 10,000 10,001 and over 8 13 20 i/ Only one roll
46、shall be taken from any shipping container, unless the number of shipping containers in the lot are less than the number of rolls required for sampling, in which case, all shipping containers shall be sampled. - 2 The lot shall be unacceptable if the points per 100 square yards (83.6m ) of the total
47、 yardage examined exceeds 28 points. The lot sh 11 be unacceptable if the individual points per 100 square yards (83.6m ) of two or more individual rolls exceed9 40 points. If one roll exceeds the point level per 100 square yards (83.6m ), a second sample, the same size as the first sample, shall be
48、 examined only for individual roll quality examination. The lot shall be unacceptable if one or mor? rolls in the second sample exceeds 38 points per 100 square yards (83.6m ). Point computation for lot quality and individual roll quality shall be as follows: 9 Total points scored in sample x 3600 =
49、 Points per 100 2 Cantracted width of cloth (inches) x Total yards inspected square yards (83.6m 4.4.2.1.1 Demerit points. Demerit points shall be assigned as follows: a For defects up to and including 3 inches (7.6cm) in For defects exceeding 3 inches (7.6cm) but not For defects exceeding 6 inches (15.2cm) but not Por defects exceeding 9 inches (22.8cm) in any any dimension = one point exceeding 6 inches (15.2cm) in any dimension = two
