1、tLc-13GU (Ord) 1 December u SUPWEDING PA-PD- 5 31 7 MY 1954 1. SCOPE 1.1 mie specification covers the following tgpcs of cloth for use in the manufacture of igniter pads ueed in amunition: !Lype I - SiUr CLass A - Breaking strength erme a8 Clase B of HILC-539 Che;: B - Breaking etrengtii same 88 Che
2、e C of MIGC-539 Clase A - Breaking strength 60 pouads per inch, PPinimum. QpeII - Acrylic . 2.1 The foUowing epecifications, and all epecificatione referenced thereon, epeci- OP the iesue in effect on date of invitation for bids, form a part of this f cal;ion: FEDERAL CCC-T-191 -Textile Test Methods
3、 DDD-S-751 -Stitches, Seme and Stitching TC-(2-595 -Colors; (For) Reedy-Mixed Paints Hum H1L-C-539 - Cloth, Silk, Cartridge-Bag MILG-2550 -General Specification for Amnunition Except -11 MIEP-l25 -Packing and Harking for Domestic Shipment of Inert MILT-13505 -Thread, Silk, Sewing (For Powder Bags) A
4、rms Aramunition Ammunition Components, General Specification for (Copies of epecificatione, standarde, drawinge, and publications required by con- tractors in connection with epecific procurement functiuns ehouid be obtained from the procuring agency or as directed by the contracting officer.) THIS
5、DOCUMENT CONTAINS 10 PAGES. i. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.1 Haterial. 3.1.1 “y-pe 1.-The material wed in the manufacture of silk igniter coth shoii 3.1.2 W II.-Acrylic igniter cioth shall be woven from acrylic yarns spun be as
6、epecified in SpecificatLon MIL4339 frm acrylonitrile polymer fibere or copolymers of acrylonitrile containing no halogene such ae chlorides, bromidee, fluorides, or iodides. Type I requiremente and teets with the exception of weave and color, shall be ae epecified in Specification MIL-C-539 Weave re
7、quirements for Type I shali be a Color requirement and test for Type i shfi, be ae specified herein. quirements and teete hall consist of ail requirements and tests specified herein. earance -Appearance of the cloth shaL be uniform and free of visible imperfec 3*3?7- ions purchase order. having a li
8、ke number of ends and picke per incn when tested as specified in 4.4. The warp and filling yarns shall be of the eame size. 3.6 Slippage.-When determined ae specified in 4.5 The elippage value ahall be ae folows: 3.2 , Class B or C. as sppiicabie (r.:ee 1.1) Type i1 re- 3.4 Wfdth.-The width of the c
9、loth shal.: be specified in the contract or 3.5 Weave.-The cioth, voven one in a dent, ehall be a plain single weave A tolerance of 0.25 inch uili be permitted. karp, minimum 60 Fii, minimum 60 3.7 - Stretch, percen;.-nhen determined as specified in 4.6, the percent stretch ahalibe ae follows: Warp,
10、 maximum iO.0 Fill, maximum 10.0 3.8 percent,. mmm 3.9 water extracl; shall be between 5.0 minimum an 9.0 maximum. ksh.-When dezermined as specified in 4.7, the percent eeh shall be 2.0 pH of water extract.-When determined as specified in 4.8, the pH of 3.10 Acidity or alkalinity.-When determined as
11、 specified in 4.9, the acidity or alkalinity Eball be a. 4.3 Inspection.-Inspection shall be as specified in Specification PJLG-2553, 4.4 beave.-Weave ehaU be determined by pieua examlne-i;ion to determine 4.5 Slippage.-?lcn teat epecimene eh611 be cut as direcked in Metho canplance with 3.5. 5420 o
12、f Specification CCC-T-191 for use in determining the breaking eerength, ex- cep% that tach epecimen shall be 16 inchee io length. The five specimens htiving %he 8hOrt dimension paralLe1 to the warp threads shall be used for the determiuation of warp slippage and the five having the short dimeneion p
13、arallel to the fiiling threads shal be ueed for the determination of fill elippege. teet, e amchine of the Etandard %ype specified in Method 5l, Specification CCC- 3-191 shall be used in the determination of elmgation. The diatance between the jawe of the meting machine shall be adJustea 1;o 3 inche
14、s. k teet epecimer, shall be folded back on iteelf 80 that the dietance from the fold to one edge, parallel to .the short dimenslon, waeures approximately 5 inches and to the othei, au least 10 inche=. Csre shall be taken to heve the fold parailel to the croeewiee yarne in the specimen. ht 0.38 inch
15、 from Lhe fold a seam shail be sewn partilie1 =o the croeswiee yarne of the epecimen. k seam of the type desianated as 301-SSa-i Speci- fication DDD-S-751 (seam SSa-1 formed with ;ne row of stitch type 301) abli be wed. One row of Etitch type 3U, 12 etitches per inch shailbe ueed to make tne 8eam. I
16、n making the Beam a suitable needie + lower Jews so that a uniform teneion of thie amount omll be applied to tne ipccimen, and the lower Jaws ehall be ciamped taking care- grip the same yarns in the lower jawe 8s are gripped in tie upper Jaws. figure 1 can be assembled from (a) a meza1 photographic
17、film clip, (b) a braes or eteel rod 6 inches iong and 3/16 inch in diameter, and (c) equal brass or ateei wefghte which are sufficient to bring the total weight of the aeuembly to 6 ounces. !be apparatus shall be arranged to obtain II teneion-stretch curve up to the breaking strength of the epecimen
18、, the Etretch being indicated in inches by tne vertical ccmponent an the teneion being indicated in pouqds by the horizontal component. The rechine shall be started and ailowed to apply tcnrion until tile specimen breake. This graphic record shail be eeignated as the fabric-stretch curve. The same e
19、pechen shall be ineerte in the jaws of the machine so that the seam ie in a poeiticn parallel to the Jaws and midway between the upper and lower jaws. The specimen shall be clamped in the jaws, applying teneion by means of the 6-ounce ciamp, as directed above, before tightening the lower jaws. be ar
20、ranged so that the graphic record of thie teet wil be mede on r;he same chart end start at the 8amt point. The machine shall be etarted end tension allowed to be applied to the specimen until either the cioth breaks or %he Beam fails. This graphic record shall be designated as the seam-etretch curve
21、. which the vertical dietance between the Eeam-stretch curve and the fabric-stretch curve ie equal to the sum of (a) the vertical distance between these curves when the tension ie 1 pound, and (b) a vertica distance on the chart equivalent to Q.25 inch on the cloth sha- be noted. follows to detemine
22、 compliance with 3.6: I The ciamp ehorm on The apparatus ehal “he teneion at The slippage vahe ehaU be calculated 8s Sippage value I a B where : AI BI tension at which the difference between the gem-stretch curve and the fabric-etretch curve is 0.25 inch plus gm each shall be cut from various portio
23、ns of the eample. be combined, weighed,and Transferred to 250-mi beaker. OP freehly boiled, dietilled water shall be added to the beaker, covered wlth a watch glaes, and boiled gently for 30 minutes. comes less han one-half the original amount during the boiling period, sufficient boiling dietilled
24、water ?hail be added to reetore it to .;he original volume. the end of 30 minutes the covered beaker and contents shall be removed from the aource of heat and the volume brought to i50 mi by adiing freshly boiled distilled water. agitating the ConteniE, to minimize the abeoqtion of carbon dioxide fr
25、om atmoc- phere. electrometer, within 1 hour after removing the beaker from the eource of heat to determine compliance with 3.9. carried through the above operations a8 a blank, and mus; show a pH value in the range 6.0 to 7.0. (Note: opecified ebove, the pH of the water used in thie test shall be a
26、djusted by re- diEtilation or by the adAition of approximately 0.1 norma sodium hydroxide or hydrochloride acid until the pH of the dietiLed water is 6.5 f 0.2.) chie hundred fifty miliiters In caee the volume of water be- At The covered beaker and contente ehal be cooled to 25 to 3OoC uihout The pH
27、 of the cooled liquid shall be determined, using a glace electrode pH The dietilied water used for this test shai, be If the distiiled water des not have e pH of 6.0 to 7.0 after the test 4.9 Aciity or alkalinity.-The water extract obzained in the determination of pE shal be decanted into 8 250 mi b
28、eaker. shall be forced out of the cloth by pressing the cloth againsc the side of the beaker with the aid of a giess stirring rod. 7.0 or greater, the solution shall be titrated, with approximately 0.U hydro- chloric acid of known normality, using methyl red a8 the indicator, to a faint reddieh tint
29、, f01:ows to determine compliance with 3.10. ke much abeorbed water ae possible If the pH of the uater extract is Any alkalinity ehail be calculated -io percent sodium carbonate a8 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. If the pH of the
30、water extract is 6.9 or less, the eolution eha- be titrated with approximatey 0.m sodium hydroxide 8oution of known normality using phenolphthalein indicator to the iiret pennanent pink color. Any acidity shsl be CalCUbted to percent acetic acid ae foLows to determine compiiance with 3.iO. 0.5 gm ea
31、ch shall be cut from various portions of the eample. be weighed together and traneferred to the extraction chamber of the Soxhiet extrac- tion apparatus having ground-glass connection. aseembled to a tared receiving flask and then transferred to the extraccion chamber until the sample ia covered and
32、 the ether aiphone over into the fraek. mtely 25 m more ether Shali be added to the extraction chamber, a condenser Eheil be aseembled to it and the aseembied apparatua shaii be paced on a steam bath. The extraction ehali be allowed to proceed for 1.5 houe. Heating chair be diecon- tinued et a time
33、when the ether content of the extraction chamber is nearry euffi- cient to cauee the ether to siphon over into the receiving flaeh. The fask, con- taining the oily extract ehali be heated on a steam bath until the ether is removed. The flask end reeidue ehall be dried in an oven at 100 f 2OC for 1 h
34、our, cooled in a deeiccator and weighed. The weight of residue shall be cacuated to percens ether extract to determine compliance with 3.ll. 4.10 Ether soluble meterial.-Ten pieces of cloth, weighing approximszely Theee pieces shall. The extraction chamber snail be Approxi- 4.11 Objectionable sizing
35、. 4.11.1 Apparatus.-A Meckey test apparatus (see figure 2 ) consisting of a cylindrical water Jacketed metal oven of the following dimensions eh63 be prepared; Outside, 8 inches high and 6 inchee in diameter; inside, 7 inches high and 4 inchee In dianteter. The vessel shall be sealed with a lid line
36、d with nonconductink mater- ialhaving three holes, one at the center for a thermometer, end two Ciametricaliy oppositenear the rim. arranged that when the lid ie An place, one tube enters the oven to a depth of 6 inches while the other risee to en equal height above the lid. e constant draft of air
37、through the instrument. the cen-cral hole, a cylinder of wire gauze, 6 Inches long and 1 1/2 inches in diameter, ehall be supported within the oven. 4.ll.2 Procedure.-A 12 f 1 ga sample cut into l/%-inch to 1/2-inch squaree shall be placed within the wire cylinder, compressing it to occupy the upper
38、 4 1/2 Inches. The thermometer shall be arranged eo that the bulb is in the center of this mass. !Che water shall be heated to the boiling point then the cylinder end thermometer shall be introduced, allowing the latter to protrude through a cork placed 5n the central hole in the lid: to boil and th
39、e temperature ehai be recorded at frequent intervals for 1 1/2 hours to determine compliance with 3.12. reepect to the presence of objectionable eizing if the fabric attains a tempereture of 1W0C within 1 hour, or if it reaches 8 temperature of 120C within 1 1/2 hours. green coloration disappears. T
40、he wire ion CCC-T-191, to determine cwpliance with 3.14. concurrenty with the elippage value and ehallbe rea6 from the fabric-stretch curve of the graphic record. no further increase in tension. as -fie maximum tension in pounds per inch recdrded on he fabric-etretch curve for the fill eiippege spec
41、-ben. Ipaximum tension in pouuds per inch recorded on zbe fabric-etretch curve for the warp elfppage specimens. as the breaking strength in that direction to deermine compliance Wien 3.14. Method 5050 of Specification CCC-T-i91 for compliance wiin 3.14 shall be dyed scarle. Tne scarleL dye shaii pro
42、duce a color closely approximating the colGr of a iguartennaster exandard coxo sample equivalen5 to red color Na. iiO5 of Specificasim n-C-595. a blend of the two: 4.13 Wcight.-Weight shal be eennined in accordance with kzhod 5C46 4.14 .Breaking s%rength.-The breaking atrength ehall be determined Th
43、e breaking smength ie chat point where there is The breaking ecrength of Che warp yarns i taken The breaking atrength of the fill yarns is taken 86 the Report the average of 5 valuee obtained in each direction 4.15 Wead count.-Thread count shall be determined in accordance wiLh 4.16 Color (eppilcabl
44、e to !type I and h Tne dyeszuffs used shall be either of the following or Sociium sal of di-toly-disazo-bief-naphthylamine-4 sufonic acid C34%6N606sp2 (Note: The coior index number ie 448 - Society of Dyers and Coloriecs.) Sodium sal of 4 sulfnapthalene-napthol Cd13N204SNa - ive: The color index num
45、ber is 176 - Society of Dyers and Colorists.) 4.17 Resubmission and retests.-If the sample eubjected to tests, faiis to pes the tets, the 10% shal be rejected. of having a partial or complete analysis made on eemples taken from all or any of %he bales in the lot at no expense to the Government. remo
46、ve the defective portion of the lot, and resubmit the lot.for acceptance. resubmitted lot hall be accepted, provided new samplee, selected in accordance with 4.2, samples pas; any teet or tests failed by the material on original submission. The contractor shall have the option The contractor may the
47、n The pass all the tesse required by this specification and thet three primary Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-5.1 Packing, labeling: and marking.-Packing, labeling, and marking shall be in accordance with Specification MGP-25. Nothe.
48、-When Government drawings, speciiicetioos, or other data are used for any purpoee other than in connection yith a definitely related Government procure- ment operation, The UniGed States Government thereby incurs no responsibility nor any obligation whabsoever, and the fact that the Government may h
49、ave formuirrted, furniehed, or in any way supplied the seid drawings, epecifications, or other data ia not to be regarded by impiication or otherwise a8 in any manner licensing the holder ilr any other person or corporation, or conveying any rights or permission -CO manufacture, uee, or eeL any patented invention thai may in any way be related thereto, Custodian: . Army-Ornance Corps Provided by IHSNot for ResaleNo reproduction or networking permitte
