1、MLL-C-ShgbF 83 m 9999706 0375211 i W tf-3-90 MIL-C-5646F 30 August 1974 SUPERSEDING MIL-C-5646E 14 August 1967 MILITARY SPECIFICATION C Cellulose-Acetate-Butyrate, Clear for Aircraft Use Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-5646F ST
2、ANDARDS Federal FED-STD-191 Textile Test Methods Military MIL-STD-105 Sampling Procedures and Tables for Inspec- tion by Attributes (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the pro
3、curing activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this specification tothe extent specified herein. Unless other- wise indicated; the issue in effect on date of invitation for bids or request for proposal shall apply. Federal T
4、rade Commission Rules and Regulations Under the Textile Fiber Products Identification Act (Application for copies should be addressed to the Federal Trade Commission, Washington, D.C. 20580.) American Society for Testing and Materials ASTM-D 3 7 7 Methods of Test for Small Amounts of Copper and Mang
5、anese in Textiles (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103.) 3. REQUIRXMENTS 3.1 Material. The cloth shall be made from 2-ply combed yarn spun from cotton of a suitable staple length to assure conformance
6、 of the finished cloth to this specification. under tension. * 3.2 Finish. Finishing shall consist of washing, framing, and medium-cold calendering. nap present and to provide a smooth, even surface. to avoid excessive roll pressure on the cloth. The yarn shall be mercerized Piece mercerization shal
7、l not be acceptable, Calendering shall be sufficient to lay any Care should be taken 2 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HIL-C-Sbq6F 83 m 9999906 0375233 O MIL-C-5646F 3; 3.3 Color. The color shall be natural unless otherwise specifie
8、d. 3.4 Physical properties. The finished cloth shall conform to the requirements in Table I when tested as specified.in 4.4. TABLE I - Physical Properties Characteristic Weave :Weight, ozs./sq. yd. (ma) Yarns per inch Warp Filling Breaking strength, Ibs. (min.) (Ravel strip method) Warp Filling Elon
9、gation, % (max (under 70 lbs. tension) Warp Filling Bursting strength, lbs./sq. in. (min.) Requirement Plain (one up and one down) 4.5 82 +2 82 T2 - 80 80 16.0 11.0 170 3.5 Width. The width of the finished cloth, inclusive of selvage, shall be as specified in Table II (see 6.2). TABLE II - Width and
10、 Tolerance of Finished Cloth Wid th (inches) Tolerance (inches) I 36 - +1/2 60 - +1 90 - +1-1/2 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-5646F 3.6 Length of roll, The finished cloth shall be furnished in rolls containing the lengths sp
11、ecified in Tabe III, TABLE III - Roll Lengths Width Roll Length (inches) (yards 1 36 500 to 600 60 250 to 300 9.0 175 to 200 3.6.1 Length of cut. The length of a single cut of the finished cloth shall be not less than 40 yards except that 10 percent of the total yardage of one width under any contra
12、ct or order may be short: lengths of from 10 to 25 yards, and 10 percent may be from 25 to 40 yards. No length shorter than 10 yards will be accepted. Short lengths shall be rolled to- gether, and the roll shall be properly labeled to indicate that it is com- posed of short lengths. 3.7 Nonfibrous m
13、aterial. The finished cloth shall not contain more than 2.0 percent starch and protein, including chloroform and water- soluble materiallwhen tested as specified in 4.4. 3.8 Copper and manganese. The finished cloth,when used as base cloth for coating, shall contain not more than 0.003 percent copper
14、 and 0.0015 percent manganese when tested as specified in 4.4. * 3.9 - The pH value of the water extract of the finished cloth shall be not less than 5.0 nor more than 8.5 when tested as speci- fied in 4.4. 3.10 Compatibility with. dope, The finished cloth shall be compatible with aircraft dope as s
15、pecified in 4.4.1. within 45 minutes when applied to the finished cloth. The dope shall dry 3.11 Fiber identification. Each roll shall be labeled, ticketed, or invoiced for fiber content in accordance with the Rules and Regulations under the Textile Fiber Products Identification Act. 3.12 Workmanshi
16、p. The finished cloth shall conform to the quality established by this specification. shall not exceed the applicable acceptable quality levels, The occurrence of defects 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-5hLlhF 83 7977906 03752
17、35 L1 9 MIL-C-5646F 4, QUALITY ASSURANCE PROVISIONS * 4.1 Responsibility for inspection. Unless otherwise speci- fied in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. cept as otherwise specified in the contract or
18、order, the supplier may use his om or any other facilities suitable-for the performance of the inspection requirements specified herein, unless disapproved by the Govern- ment, The Government reserves the right to perform any of the inspections set forth in the specification where such inspections a
19、re deemed necessary to assure that supplies and services conform to prescribed requirements. 4.1.1 Certificate of compliance. Where certificates of com- pliance are submitted, the Government reserves the right to test such items to determine the validity of the certification. Ex- 4.2 Quality conform
20、ance inspection. Sampling for inspection shall be performed in accordance with MIL-STD-105, except where otherwise indicated hereinafter. 4.2.1 Component and material inspection, In accordance with 4.1 above, components and materials shall be tested in accordance with all the requiremenis of referen
21、ced specifications, drawings and standards unless otherwise excluded, amended, modified or qualified in this specification or applicable procurement documents, In addition, the supplier shall submit a certificate of compliance stating that mercerized combed cotton yarns were the only yarns used in t
22、he weaving of the cloth. 4.2.2 Examination of the end item. Defects found during this examination shall be classified in accordance with 4.2,2.1 through 4.2.2.3. * 4.2.2.1 Yard-by-yard examination. The required yardage of each roll shall be examined and the visual defects classified as listed in Tab
23、le IV. All defects found shall be counted regardless of their proximity, one to another, except where two or more defects represent a single local condition of the cloth, in which case only one defect shall be counted for each warpwise yard or fraction thereof in which it occurs. product for this ex
24、amination shall be 1 linear yard. the yard-by-yard-examination shall be determined in accordance with MIL-STD- 105, Inspection level II; 2.5 major defects and 6.5 total defects per 100 units. be expressed in units of one yard each. be in accordance with Table V and approximately an equal number of y
25、ards shall be examined in each roll. The unit of The sample size for and the Acceptable Quality Level (AQL) shall be The lot: size shall The number of rolls sampled shall 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-SbqbF 83 W 99997Ob 0375
26、2Lb b MIL-C-5646F TABLE IV - Classification of Defects Defects Hole, cut or tear, including selvage Smash, any Broken or missing yarns Three or more contiguous regardless of length Two contiguous, 2 inches or more missing Two contiguous, less than 2 inches, or single 2 inches or more missing Fine fi
27、lling bar or light place, clearly visible - i/ Thin place, open place, crack or hitchback opening at widest point three or more yarn diameters, or sequence of openings resulting in a weak spot Thin place, open place, crack or hitchback opening clearly visible I/, but opening at widest point less tha
28、n three yarn diameters Floats or skips - multiple, 1/2 inch or more in combined warp and filling directions, or harness skips Floats or skips - multiple, less than 1/2 inch in combined warp and filling directions, or single floating over 2 inches or more Heavy filling bar, heavy place, coarse or add
29、itional yarns, clearly visible - i/ thickening of cloth Slough-off, jerked-in filling, slugs, slubs or gouts in either direction more than three times the thickness of normal yarn Major X X X X X X X X Minor X X X X 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
30、se from IHS-,-,-a MIL-C-5646P TABLE IV (Continued) Defects Slough-off, jerked-in filling, slugs, slubs or gouts in either direction clearly visible i/ but not more than three times the thickness 07 normal yarn Kinks - single, more than 1 inch in length, or multiple 1 inch or less in length Spot, Sta
31、in, or streak - clearly visible - i/ (Count regardless of cause, i.e., not re- stricted to rust, oil or grease). rim or light detergent mark, where a stain has been removed, shall not be classified a defect However, a Mixed filling, finishing mark, clearly visible at 6 feet distance Wrinkle or creas
32、e - embedded Knot - oversized, extending from surfaces of cloth Wrong draw, reed mark - clearly visible - i/ Temple mark - resulting in pin holes or frayed fibers, clearly visible - i/ Baggy ridgy, or wavy cloth, clearly visible 1/ - Tender or weak place - any Major X Minor X X X X X X - i/ Clearly
33、visible at normal examination distance of 3 feet. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-56LIbF.83 W 3777706 0375237 1 c MIL-C-5 6 4 6F
34、 4.2.2.3 Examination for length, 4.2.2.3.1 Individual rolls. 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 two yards less than the length marked on the ticket, shall be considered a defe
35、ct with respect to length. are defective in respect to length. The lot shall be unacceptable if two or more rolls in the sample 4.2.2.3.2 Total yardage in sample. The lot shall be unacceptable if the total of the actual lengths of rolls in the sample is less than the total of the lengths marked on t
36、he tickets. 4.2.2.4 Examination for noncompliance with the Rules and Regula- tions Under the Textile Fiber Products Identification Act. yard-by-yard examination, each roll in the sample shall be examined for con- During the formance- to the Rules and Regulations under the Textile Fiber Products Iden
37、tification Act. Each roll not labeled in accordance with this act shall be a defect. occur. The lot shall be unacceptable if two or more of these defects * 4.3 Examination of preparation for delivery requirements. An examination shall be made in accordance with the provisions of PPP-P-1134 to determ
38、ine whether packaging, packing, and marking meet the requirements . of Section 5. * 4.4 Testing of the end item. The methods of testing speci- fied in FED-STD-191, wherever applicable, and as listed in Table VI shall be followed, to the results of the determinations made on a sample unit for test pu
39、rposes as specified in the applicable test method. The sample unit shall be 2 continuous yards, full width, cf the finished cloth. The lot size shall be expressed in units of 1 yard each. The lot shall be unacceptable if one or more sample units fail to meet any requirement specified. reports shall
40、contain the individual values utilized in arriving at the final result. The physical and chemical values specified in Section 3 apply All test The sample size shall be as follows: Lot size (yards) Sample size 800 or less 801 to 22,000, inclusive 22,001 and over 2 3 5 9 Provided by IHSNot for ResaleN
41、o reproduction or networking permitted without license from IHS-,-,-* HIL-C-56qbF 83 7797906 0375220 8 m TABLE VI - Test Methods MIL-C-5646F Characteristic Material Ply Weave Mercerization Finish Yarns per Inch Er eaking Strength (Ravel Strip Met hod) Bursting . S t reng th Elongation Weight Nonf ib
42、rous Mat erial Copper and manganese content Requirement Reference 3.1 3.1 Table I 3.1 3.2 Table I Table I Table I Table I Table I 3.7 3.8 Test Method 1200 1 Visual Visual Micro- scopic - - i/ 5050 5104 5122 21 5104 - 5041 2611 ASTM- D377 No. of Determination Per Individual Sample Unit 5 10 5 5 2 2 c
43、opper 2 manganese r . Results Reported As - Pass or fail Pass or fail Pass or fail Pass or fail Pass or fail Avg of the 5 dets. to nearest whole no. Avg of the 5 dets, to nearest 1. O pound Avg of the 10 dets. to nearest scale division Avg of the 5 dets. to nearest 1.0 percent Avg of the 5 dets. to
44、near- est 0.1 ounce/ sq.yd, Avg of the 2 dets. to near- est 0.1 percent To nearest .O01 percent copper .O001 percent manganese 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TMLE VI (Continued) . .- r Characterrtic Requirement I Teat NO. of Deter
45、adrutiona erultr Reference Xethod Per Individual I Rezted Saqle Unit 3.9 2 I 2811 I I Avg of the 2 detm. to I nearest 0.1 pi3 I PAS or fail I 3.10 I 4.4.1 I 1 Corpatibility vith dope I I 1 I - i/ 2/ A supplierr certificate of compliance shall be acceptable. The length elongated shall be measured fro
46、m a baseline on the chart to the point at which the curve intersects the 70-pound load ordinate, with the baseline passing through the point where the curve leaves the zero load ordihate. 4.4.1 Coatlblllty with dope. The test shall be performed under conditions of temperature and humidity specified
47、in PED-STD-191. coat of dope (at package consistency) coriformlng to MIL-D-5549 shall be aprud rwothly on a plate glass panel, using a doctor blade with a clear- ance of 0.008 inch. a hard, dry, transparent film resulte, the dope should be considered AS conforming to the applicable specification req
48、uirements. finished cloth sh.11 then be drawn taut and rmooth by hand over the open end of A lipped beaker. drafting tape, or other suitable method of attachment. have a diawtcr of 4 inche uniformly over the surface of the taut cloth. conrirtcncy. (215 reconda), dope. A Allow the dope to dry for 30
49、minutes (515 seconds). If A specimen of the Fasten the cloth in posktion with a heavy rubber band, The beaker shall Seven millimeters of dope shall be spread The dope shall be at package The doped specimen ahall then be allowed to dry 45 minutes Exsudne the specimen for dryness and compatibility with 5. PREPARATIOI FOR DELIVERY s.1 Put-up and packaging. Put-up
