1、1 flIL-C-5125LA 3 W 9977706 0447452 b MIL-C-5 125 1A( EA) 11 May 1988 SUPERSEDING MIL-C-51251 (MU) 6 April 1966 MIL I TARY S PE C IF IC AT I ON CLOTH, COATED; CBR PROTECTIVE This specification is approved for use within U.S. Army Chemical Research, Development and Engineering Center, Department of t
2、he Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of butyl coated nylon cloth. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and s
3、tan- dards form a part of this specification 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 Specifications and Standards /,DODISS) and supplement thereto, cited in the solicitation. SP
4、ECIFICATIONS FEDERAL PPP-P-1136 - Packaging of Coated (Plastics; Rubber) and Laminated Fabrics. MILITARY MIL-C-7020 - Cloth, Parachute, Nylon. MIL-D-12468 - Decontaminating Agent, STB. : Beneficial comments (recommendations, additions, deletions) and any perti- : : nent data which may be of use in i
5、mproving this document should be addressed: : to: Commander, U.S. Army Chemical Research, Development and Engineering : : Center, ATTN: SMCCR-SPT-S, Aberdeen Proving Ground, MD 21010-5423 by using: : the self-addressed Standardization Document Improvement Proposal (DD Form : : 1426) appearing at the
6、 end of this document or by letter. AMSC NIA FSC 8305 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS FEDERAL FED. TEST METHOD STD. NO. 191 - Textile Test Met
7、hods. MILITARY MIL-STD-109 - Quality Assurance Terms and Definitions. MIL-STD-282 - Filter Units, Protective Clothing, Gas Mask Components MIL-STD-1487 - Glossary of Cloth Coating Imperfections. and Related Products: Performance Test Methods. (Copies of specifications and standards required by contr
8、actors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publications. The following documents form a part of this speci- fication to the extent specified herein. Unless otherwise specified, the i
9、ssues of the documents 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 non- government documents which is current on the date of the solicitati
10、on. ASTM STANDARDS D 751 - Coated Fabrics (DOD adopted). (Application for copies should be addressed to ASTM, 1916 Race Street, Philadelphia, PA 19103.) (Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. Thes
11、e docu- ments also may be available in or through libraries or other informational ser- vices. ) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standar
12、ds), 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 Materials. 3.1.1 Base fabric. The base fabric shall be nylon cloth conforming to type
13、I of MIL-C-7020 except the color shall be natural and the air permeability requirement and silicone oil treatment shall not apply. 2 t NIL-C-5125LA 3 W 7797906 04117453 MIL-C-5 1251A( EA) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-51251A 3
14、 M 999970b 044745Lt T M MIL-C-51251A(EA) 3.1.2 Coating compound. The coating compound shall be a butyl rubber composition. No natural rubber, reclaimed rubber, or synthetic rubber other than butyl shall be used. 3.1.3 Coating. The coating compound shall be applied to both sides of the base fabric af
15、ter which it shall be fully vulcanized. The distribution of coat- ing shall be 50 to 75 percent on one side with the balance on the other side. Both sides shall be dusted with a non-abrasive powder to prevent blocking and to produce a uniform dull finish. 3.1.4 Age. The coated cloth shall be not mor
16、e than 30 months old from the date of manufacture of the nylon base fabric to the date of submission of end item test results to the Government. - 3.2 Physical and chemical requirements. The coated cloth shall conform to table I when tested as specified in table V. 3.3 Length. Each roll shall contai
17、n from 180 to 220 Linear yards and shall consist of no more than four pieces with no single piece being less than 6 yards long. The ends of the pieces shall be overlapped and not joined by a seam. 3.4 Width. order (see 6.2). The width shall be as specified in the contract or purchase 3.5 Odor. The c
18、oated cloth shall be free from any odor, except the charac- - teristic odor of the coating compound. 3.6 Color. The color of the coated cloth shall be as specified in the con- tract or purchase order (see 6.2 and 6.7). 3.7 Marking. The words “HEAVY SIDE“ shall be stenciled in legible 1/2-inch black
19、letters on the heavier coated side (or on either side if the coating is equally distributed on both sides) of each roll. The marking shall be located within 2 inches from one edge and spaced no more than 1 yard apart. 3.8 First article. Prior to the start of regular production, a first arti- cle sam
20、ple of coated cloth shall be produced in accordance with this specifica- tion for examination and test (see 4i3). techniques shall require a new first article sample. Changes in formulation or processing 3.9 Workmanship. The coated cloth shall conform to the quality of product established by this sp
21、ecification. The occurrence of defects shall not exceed the applicable acceptable quality levels. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TABLE I. Physical and chemical requirements Characteristic Minimum . Maximum : : Weight, ounces per sq
22、uare yard : Puncture strength, pounds : : Initial breaking strength, pounds : Warp : Fill 0 : Breaking strength, after weatherometer and : after decontamination, pounds : Warp : Fill . : Hydrostatic resistance, pounds per square inch : Bow and bias, inches . : Coating adhesion, pounds per 2-inch wid
23、th : Abrasion resistance : Stiffness, warp, centimeters : At 70 + 2F : At -2O-+ 2F : Agent resistance, initial, after weatherometer : and after decontamination, minutes : . - . : Mustard (HD) : GB : Blocking : Color fastness after we : decontamination : th rome t r nd ft 6.5 10 50 45 40 35 60 - 4 pa
24、ss* - - 30 30 - * r *After having been abraded, no base fabric shall be exposed in the *The color of the coated cloth shall not be substantially changed. center one inch of the abraded portion. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the con-
25、tract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-SLZSLA 83 9999906 0447456 3 MIL-C-512
26、51A(EA) in the contract or purchase order, the contractor may use any commercial labora- tory certified by the Goverment as qualified to perform the specified toxico- logical agent tests and his own or any other facilities suitable for the perfor- mance of the remaining inspection requirements speci
27、fied herein, unless dis- approved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to insure that supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compli
28、ance. Al1 items must 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 relieve the contractor of the responsibility of assuring that all products or suppl
29、ies submitted to the Government for acceptance comply with all require- ments of the contract. Sampling in quality conformance does not authorize sub- mission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material. The inspectio
30、n set forth in this specification shall 4.1.2 Objective evidence. The contractor shall provide objective evidence acceptable to the contracting officer that the requirements of 3.1 and section 5 for which specific inspection has not been provided in this specification. have been satisfied. When cert
31、ificates of compliance are submitted, the Govern- ment reserves the right to inspect such items to determine the validity of the certification. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) (b) First aricle inspection (see 4.3). Qualit
32、y conformance inspection (see 4.4). 4.3 First article inspection. 4.3.1 Sample. Prior to the start of regular production, a 7 yard, full width sample of the coated cloth shall be produced using the same methods, mate- rials, equipment and processs as will be used in regular production. yards of the
33、sample shall be used for testing all physical and chemical require- ments, except for toxicological agent resistance. The remaining 3 yards of the sample shall be used for testing toxicological agent resistance initially, after weatherometer, and after decontamination. Four 4.3.2 Inspection procedur
34、e. 4.3.2.1 For examination and test. As determined by the Government, the first article sample of the coated cloth shall be examined and tested for any or all of the requirements of this specification. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
35、,-MIL-C-5L251A 83 m 777770b OLi47457 5 m b MIL-C-51251A(EA) 4.3.2.2 Rejection criteria. The first article sample shall be rejected if it fails to meet any of the requirements of this specification. The Government reserves the right to terminate inspection and testing upon failure to meet any of the
36、requirements of this specification. 4.4 Quality conformance inspection. 4.4.1 Lotting. A lot shall consist of the coated cloth produced from no less than one lot or no more than four lots of base fabric coated by one manu- facturer, at one plant, using the same materials and processes, and under ess
37、en- tially the same manufacturing conditions. 4.4.2 Sampling and inspection procedure. 4.4.2.1 Classification and marking of defects. Defects found during examina- tion shall be classified in accordance with tables II and IV. These defects shall be marked and flagged, on each sample roll examined, a
38、s follows: Major defects shall be flagged at the selvage edge with red thread or red masking tape. white masking tape. marking pencil. Minor defects shall be flagged at the selvage edge with white thread or All defects shall be circled with red or yellow crayon or 4.4.2.2 For visual examination. Twe
39、nty-five continuous yards selected at random from each sample roll shall be examined on one side only (see table II), however, the side shall be alternated so that alternate rolls are examined on the face and back, respectively. The same yardage shall be given a thorough lighting inspection for tran
40、slucent areas. regardless of their proximity to each other, except where two or more defects represent a single local condition of the coated cloth, in which case only the more serious defect shall be counted. A continuous defect shall be counted as one defect for each warpwise yard or fraction ther
41、eof in which it occurs. The sample size shall be in accordance with table III. The AQL (defined as speci- fied in MIL-STD-109) shall be 4.0 for major and 6.0 total (major and minor com- bined) defects per 100 linear yards for the total yardage examined from the lot Defects found shall be counted 44.
42、2.3 For overall examination. Each roll of coated cloth used in the visual examination shall be examined for the defects listed in table IV. If the total number of defects in the sample rolls exceeds the applicable accep- tance number specified in table III or if the total of the actual lengths of th
43、e sample rolls is less than the total of the lengths marked on the roll tickets, the lot shall be rejected. 4.4.2.4 For test. (a) Physical and chemical testing. For all characteristics, other than those for toxicological agent resistance, the coated and cured cloth shall be tested in accordance with
44、 the methods of testing specified in table V. The sample unit shall be four continuous yards, full width, of the coated and cured 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4 - MIL-C-SLZSLA 83 W 7779706 0447q.58 7 MIL-C-51251A(EA) TABLE II. Vi
45、sual examination of coated cloth . I : Classification : . Defects : Major : Minor : : Materials and Coating: : Translucent areas more than three in a linear : Any pit, blister, abrasion, scratch or tunnel in : Any delamination of the coating : : Any uncoated area : Any tackiness or soft coating (ins
46、ufficient : : Dry or burnt areas (over vulcanization) : Heavily coated areas : Any brittle area which cracks when bent : Finish not dull : Workmanship: : Any cut, hole or tear (including the selvage) : Any crease or wrinkle resulting in doubling, . yard, clearly noticeable* the coating Any lump or e
47、mbedded foreign material b vulcanization) Uneven coating (missing or insufficent coating) . adhesion of surfaces, or delamination of coating rolled, or scalloped when corrected by manual pressure : Edges not straight and uniform, or edges folded : Uneven tension (clearly noticeable ridges, pucker, o
48、r waviness in cloth that will not flatten under manual pressure) : Ripples, waviness, or dimensional distortion : Any spot,.stain, or streak more than 1 inch in combined directions that cannot be readily removed with naphtha or water resulting in : Any spot, stain, or streak not affecting coating :
49、Spl-iced cloth (base fabric or coated cloth) or : Dusting powder omitted : Odor defective coating . impression in coating from splicing threads : X X X X X X X X X X X X *The examination for translucent areas shall be performed in accordance with the through-light inspection procedure in MIL-STD-1487. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-51251A 83 m 7779706 04
