1、XIL-T- 22 7 5 5B (SliIPS ) 22 November 1972 SljPCHSELJIIIti XIL-T-22755A (SiiIPS) 9 December 1968 (See 6.2) :IILITARY SPCCIICA”r1ON TAPE, REPAIR: MAGNETIC MINESWEEPING CABLE SIICATII 1. SCOPE 1.1 Sopc. This spccification covcrs repair tape for the insulation of spliccs and for making watertight rcpa
2、irs o11 magnetic minesvccping cable sheaths. 1.2 Classification. Repair tapc shall be of the following types, as specifie (see 6.1) : Typo I - Synthetic or natural rubber. Type II - Synthetic or natural rubber coatcd cotton fabric. 2. APPLICABLE WCIlLiITc 2.1 # The following dounciits of the issue i
3、n effcct on date of invitation for bids or request for proposal, form a part of thc specification to the extent specified herein: SPECIFICAIIONS FEDERAL pPP-U-56b - Loxus, Folding, Paperboard. PPP-U-636 - Doxes, Shipping, Fiberboard. PPP-U-67G - UOXS, Gatup. MILITARY ilIL-P-11 - Preservation, :letho
4、us of. STANDARDS FEDCRhL FED-S1)-6ill - Rubber: Sampling and Testing. IIILITARY MIL-SFD-129 - ilarking for Shipmcnt and Storage. (Copies of cpccifications, standards, drawings, and publications required by supplicrs in connection with specific procurement functions should bc obtained from the procur
5、ing activity or as directcd by tlic contracting officer.) the extent-iified herein. invitation for bids or request for proposal shall apply. # 2.2 Othcr ublications. The following uocunoiit forms a part of this spccification to nlcss otherwise indicated, the issue in effect on aate of L5I IFOHM CLAS
6、S I FICATI0:J COHI11 TlEL . Uniform Freight Classification Rules. (Application for copies should be adrcsscd to the Gniform classification Committee, Room 1106, 222 South Riverside Plaza, Chicago, Illinois 60606.) NATIONAL CLASSIFICATION BOARD National llotor Frcight Classification Rules. Associatio
7、n, Inc. , 1616 P Street, X.I.1. , Washington, D.C. 20036,) available for referencc from libraries. They arc also uistributcd among technical groups and using Fedcral agcncids.1 (Application for copias should be addressed to tile Ilational lotor Freight Traffic (Technical society an tcchriical associ
8、ation spccificationn and standards are cpxwrally “t- THIS OOCUMEMT CONTAIN$ -2. PA- FSC 5970 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.1 I4ntorial. 31.1 L. %ne typo 1 repair tapc matorial shall consist of an unvulcanizcd or No reclaimed rub
9、bcr shall be usod. 3.1.2 T o II, Tlie typc II repair tape matorial shall br: a rubberized fabric tapo by calcndcring 8 layer of uncured rubber to clean cotton shoeting on The rubbur shall be evenly and smoothly applied by the frictioning proccss. partially vulcanizcd natural or synthctic rubhcr comp
10、ound or mixture suitable for unvulcan- izad and vulcanizcd ropairc. The tapo shall conform to tiic applicoblc requirenonts of 3.2 through 3.10. which ehnll ono side only. Tho eproading process sliall not bc usod. to cxpedito the calendcring process. requirements of 3.2, 3.3, 3.4, 3.10.1 and 3.11. in
11、 tho type I -except t!rat it shall be in the conplotcly unvulcanized condition. ruhbar shall moot tho requironcnts of 3.5 t1iroFgli 3.9, tho type known commercially as “clean Osnaberg,“ or equal, approximately 4.5 ounces per equare yard. No solvants or dilucnts of any kind may bo used Thc type II ta
12、pe shall conform to the applicable 3.1.2.1 Rubber. The rubbcr uscd in the type II tapc shall ba the samo material used The Thc fabric usd in the type II tape clin11 be clean cotton fabric of 3.1.2.2 Fabric. 3.2 Rolla. 3.2.1 L. liic typo I tapo shall bc wound avonly in 21-foot length6 on rolls. Adjac
13、ent layers in each roll shall bo separated by parchmnt papor or glazod sheeting which shall cover tho outor side of thc tapc. not exhibit any unduo tondoncy to stick to thc! rubber or to ravel. Whcn unwound from thc roll, the separator shall 3.2.2 T,ypc 3. The type II tape shall be wound eveiily in
14、60-foot lengths on rolls. 3.3 Sliicknoss, 3.3.1 e I. When tcstcd as specified in 4.5.1.1, the thickness of the type I tape 3,382 When tasted as specificd in 4.5.1, the tliicknoss of the type II tape shall lie 0.0%- 0,003 inch. ahall be 0.0% E003 inch. e II, 3.4 Width. 3.5 Tensile strenqth. 3.5.1 Unv
15、ulcanizod. The tensilo strength of unvulcanized material shall bo as followsr 3.5.1.1 Initial, iiheii testc as specified in 4.5.3, the tensile strength of tho tape 3.5.1.2 A ed, After the tapo has been agod as specified in 4.5.10 and then tested as Whon tested as specified in 4.5.2, the width of the
16、 tape shall be 2 2 1/32 inchas. shall be 250 p-cr squarc inch ip,s,i., minimum. spccified in 4%, the tensile strength shall be 250 p.s.i. minimum. 3.5.2 Vulcanizocl, Whun tested as specificd in 4.5.3.1, tlic tensilo strongth shall be 2,000 8s.i., minimum. 3.6 Ultimato elongation. 3.6.1 Unvulcanizod.
17、 The ultimate elongation of the unvulcanizud material shall be as f0llWdB I 3*G.l.l Initial. When tested as specified in 4.5.4, the ultimate elongation shall be 300 parcent, m3XK 3,6,1,2 A ed After tho tape has boon agod as spocified in 4.5.10, and then tosted ad specified i*;., , the ultimate elong
18、ation shall be 300 percent, minimum. 3.6.2 Vulcanized, when testod as spucified in 4.5.4.1, the ultimato elongation shall be 400 porcont, minimum. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-a 3.7 Fusion. 3.7.1 Initial. When tested as specified
19、 in 4.5.5, he tape shall not unwind more than two and one-mrns in the first 2 minutes, during which time it shall sustain the weight or shall break at the point of unwinding. 3.7.2 s. 3.8 Tackiness. After being aged as specified in 4.5.10 and then tested as specified in 4.5.5, the tape shall conform
20、 to the requirements specified in 3.7.1. 3.8.1 Initial. When tested as specified in 4.5.6, the tape shall not show any tendency to unwind. - 3.8.2 m. 3.9 Dielectric strength. 3.9.1 Initial. When tested as specified in 4.5.7, the tape shall have a minimum After being aged as specified in 4.5.10 and t
21、hen tested as specified in 4.5.6, the tape shall not show any tendency to unwind. dielectric strength of 350 volts per mil of thickness. 3.9.2 After being immersed and tested as specified in 4.5.7.1, the tape shall have a- dielectric strength of 300 volts per mil of thickness after 48 hours immersio
22、n, and a minimum of 250 volts per mil of thickness after 168 hours immersion. Immersed. 3.10 Adhesion. 3.10.1 Vulcanized. For vulcanized specimens, the adhesion shall be as follows: 3.10.1.1 Initial. When tested as specified in 4.5.8 as applicable or vulcanized specimens, the adhesion between the ta
23、pe and each of the two standards shall be 15 pounds, minimum, per inch width pulled. After being aged as specified in 4.5.10 and then tested as spccified in 4.5.8 as appkble for vulcanized specimens, the adhesion between the tape and each of the two standards shall be 15 pounds, minimum, per inch wi
24、dth pulled. 3.10.1.2 A ed. 3.11 Breakin stren th II on1 ). When tested as specified in 4.5.9, the break- ing strengtd type II tape shxl-be4.O pounds per inch width pulled, minimum. 4. QUALITY ASSURANCE PROVISIOI4S 4.1 Res onsibilit for ins ection. Unless otherwise specified in the contract or Except
25、 as otherwise specified in the contract or order, the purchase orde:, the supElm is :esponsibie for the performance of all inspection require- ments as specified hercin. supplier may use his own or any other facilities suitable for the performance of the in- spection requirements specified herein, u
26、nless disapproved by the Government. The Govern- ment reserves 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 pres cri bed requi Zement s. 4.2 Samplinq. 4.2.1 Lot. For inspection purpos
27、es, a lot shall consist of all tapc of the sane type produced in one manufacturing batch and offered for delivery at one time. selected at procedures. 4.5.1 Thickness, The thickness of the tape shall be determined by method 2011 of however, any mold which will producc 1/8 inch think sheets of larger
28、 area may be used. and Standard N-cut into 2ki-inch long strips. roughened on one face by buffing on a coarse grinding wheel or other suitable means. 4.5.8.2 Pre aration of adhesion s ecinens Thc vulcanized sheets of Standard No. 1 These strips chal1 be Buffing 5 Provided by IHSNot for ResaleNo repr
29、oduction or networking permitted without license from IHS-,-,-_ - _ _ - _ MIL-T-22755B 59 W 999990b 0026597 9 MIL-T-227 550 (CHIPS) dust shall be removed by means of a clean brush. as follows silail be applied to the roughened surface and allowed to dry until the odor of solvent is no longer apparen
30、t: One brush coat of rubber cement formulated Cement - I Ingredients Parts by weight Smoked sheet 100 Zinc oxide treated with proprionic acid - (Protox 166) Meium proccscing channel black (Micronex) Semi-reinforcing furnace black (Pelletex) Stearic aci 5 20 20 2 Pine tar 2 RPA 140. 2 0.2 Phenyl beta
31、 napthylamine (Xeozone U) 1.5 2 - Mercaptobenzothiazole (Captax) 1 Sulfur with small perccntage of magne- sim carbonate (Spider sulfur) 5 The above ingredients shall be mixed on a mill and then dissolved in 883 parts by weight of toluene to make a 15-percent solids content cement. A piece of separat
32、or (parchment paper or glaxed sheeting) 2 inches wide shall be applied to the cemented surface to cover about two inches of the length at one end of the strip. 4.5.8.2.1 Procedurc for vulcanized specirncn. 4.5.8.2.1.1 L. Six-inch lengths of tape shall be rollcd down against the cemented surface prep
33、ared a5 specified in 4.5.8.3, and over the separator, to build up the thickness of the assembly or slightly more than 1/4 inch. by 6 by 1/4 inch mold and vulcanized for 30 minutes at 310 + 2F. under a pressure not less than 500 p.s.ir off both sides. The adhesion shall then be determined as specifie
34、d in 4.5.8.3. against the cementd%urface prcparcd as specified in 4.5.8.3 and over the separator. assembly shall then be placed in a 2 by G by 1/3 inch mold and vulcanized for 30 minutes at 310 $. 2F. under a pressure not less than 500 p.s.i. The vulcanized assembly shall then be reduczd to a 1-inch
35、 width, cutting off both sides. The adhesion shall then be determined as specified in 4.5.8.3. 4.5.8.3 Determination of adhesion. Thc specilnuns prepared as specified in 4.5.8.2 and 4.5.8.2.1 as applicable, sham be subjected to the adhesion test specified in method 8011 of FED-STD-601. shall be pull
36、ed back by hand and clamped in the upper jaw of the testing machine. 2 inches of base standard strip with separator shall be attaclicd to the lowcr jaw of the testing machine and thc adhesion determined. The assembly shall then be placed in a 2 The vulcanized assembly shall then be reducd to a 1-inc
37、h width, cutting 4.5.8.21.2 T e El. A 6-inch length of tape shall bc rollcd, rubber-coated side down, The The 2 incites of tape lying over the separator of each specimen being tested The exposed 4.5.9 Dreakin stren tli (t e II in. The breaking strcngth of the type II tape shall be determinedgbCTIOli
38、S , DELETIOlS) FROM TIIC PRCVIOUS ISSUE HAVE: BEEN IIAUE. THIS WAS DONE AS A CONVCIIIEI3CC O3LY KID THE GOVERiJlIENT ASSUHES NO LIABILITY WIIATSOEVER FOR ANY INACCURACIES IN TIICSE NOTATIONS. BIDDERS AtiU COiJTKACTORS ARE CAUTIONEU TO EVALUATE TIE REQUIREMENTS OF THIS DOCUIII;iJTIRE COiJTCIT IRRCSPECTIVC OF TIIE IVLRGINAL NOTATIONS AND RELATIONSIIIP TO THE LAST PRCVIOUS ISSUE. Prcparing activity: Navy - SI: (Project 5970-N386) 7 h U. S. GWERNMENT WIINTING OFFICE; 1972 -714-540/3005 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
