1、MIL-C-267128 26 February 1982 SUPERSEDING 12 August 1957 MIL-C-26712A (ASG) MILITARY SPEC1 FICATION CLOTH, COATED, NYLON, CHLOROPRENE-COATED 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 type f c
2、h1oroprene.coated nylon cloth. 2. APPLICABLE DOCUMENTS 2.1 Government documents. Unless otherwise specified, the following specifications-and standards of the issue listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation form a p
3、art of this specification to the extent specified he.rein. SPECIFICATIONS FEDERAL PPP-P-1136 Packaging and Packing of Coated (Plastic, Rubber) and Laminated Fabrics Beneficial comments (reconiniendations , additions , deletions) and any pertinent data which may be of use in improving this document s
4、hould be addressed to: self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AFWAL/MLSA, WPAFB, OH 45433 by using the FSC 8305 Licensed by Information Handling ServicesMIL-C-267128 STAN DARDS FED E RA L FED-STD-191 Textil e Te
5、st Methods MILITARY MI LYSTD-105 Sampl ing Procedures and Tab1 es for Inspection by Attributes (Copies of specifications, standards, drawings, and pub1 ications required by contractors in connection with specific procurement functions should be obtained from the procuring activities or as directed b
6、y the contracting officer.) 2.2 0rder.of precedence. text of this specification and the references cited herein, the text of this specification shall take precedence. In the e.vent of a conflict between the 3. REQUIREMENTS 3.1 Materials. The.base cloth shall be woven from nylon yarns. 3.1.1 Yarn. Th
7、e yarn used shall be an 840 denier, single ply, continuous filament,bhigh- however, the side examined shall be alternated on every other roll. The visual defects shall. be as classified in accordance-with Table IV and shall be counted regard- less of their prciximity to each other, except where two
8、or more defects represent a singlelocal condition of the cloth in which case only the more serious defect shall be counted. The sample unit shall be one linear yard. The AQL shall be 4.0 major defects and 10.0 total defects per hundred units (yards). The inspection level shall be level II. The numbe
9、r of rolls from which the sample is to be selected shall be in accordance with Table V. An approximately equal number of yards shall be examined in each roll sampled. 4.2.2.2 Overall examination. The sample unit for this examination shall be one piece, The pieces examined shall be those selected for
10、 the yard-by-yard examination. The acceptance number shall be as shown in-Table V. The cloth shall be defective if it has an objectionable odor, overall uncleanliness, sor is tacky (coating will adhere and not readily unroll). - 4.2.2.3 Examination for length. 4.2.2.3.1 Individual for length. The sa
11、mple unit shall be one roll. The number of rolls to be examined and the acceptance number shall be in accordance with Table V. The following shall be considered defects. Any roll (gross length) less than minimum or more than maximum speci fi ed. Any roll (gross length) more than 2 yards less than gr
12、oss length marked on ticket. Any roll containing more than 2 pieces. Any piece in roll less than 40 yards. 5 Licensed by Information Handling Services flIL-C-2b712B 83 179170b 0385512 5 MIL-C-267128 TABLE III. Component and material inspection Characteristic Requirement Pa rag rap h I Base cloth Wei
13、ght, oz/sq yd Table I Thread count per inchi Tab Breaking strength Tab 1 bs. (minimum) e1 e1 Yarn Identification as I 3.1.1.1 - nylon Melting point 3.1.1.1 Coati ng compound Identi fi cati on as I 3.1.2 chl oroprene I Test Method 5041 5050 51 04 1530 lJ 1534 - 21 Number of determi n- ations per samp
14、le unit 1 2 Result reported as Pass Numerically or Fai 1 to the nearest 0.1 oz whole no. 0.1 lb 1 Oc I/ The supplier may submit a certificate of :ompliance with each ship- ment or lot stating that this requirement has been met instead of performing the test. - 2/ The supplier shall submit a certific
15、ate of compliance with each shipment or lot stating that this requirement has been met. 6 Licensed by Information Handling ServicesO -, MIt-C-26762B 83 7Ob 0365533 7 I! MIL-C-267129 - TABLE IV. Classification of defects. Defect Blisters, lumps, or delamination of coa ti ng Crease Light area or windo
16、w (due to poor blending of pigmentation only) Narrow width Pinhole, cut, or tear - l/ Stain or streak Uneven coating Extent of defect I Major . Covering any area 1/8 x inch square or greater Permanent, that cannot x be corrected by manual pressure More than 5 in a linear yard Width less than minimum
17、 specified any size X Coating compound stain or streak clearly noticeable at distance of 6 feet Any thin areas, where x coating compound is missing or insufficient Any heavily coated areas, cl early noticeable at distance of 6 feet Mi nor X X X X - l/ The cloth shall be run over a bank of lights hav
18、ing sufficient intensity to show the defect through the coated cloth at an inspec- tion distance of two feet. TABLE V. Sample size Lot size in yards Sample size Acceptance number Up to 1200 1/ inclusive 3 O 1201 to 3200 inclusive 5 O 3201 to 10,000 inclusive 8 O 10,001 to 35,000 inclusive 13 O 35,00
19、1 to 150,000 inclusive 20 1 150,001 and over 32 2 c l/ If a lot contains fewer than three rolls, each roll in the lot shall be examined. 7 Licensed by Information Handling Services- 4.2.3 Testing of the end item. The methods of testing specified in FED-STD-191 wherever applicable and as listed in Ta
20、ble VI shall be followed. .The requirements specified in Section 3 apply to the average of determinations made on .a sample unit for test purposes as specified in the applicable test method. The lot size shall be expressed in units of.l linear yard. purposes shall be 5 yards, full width of finished
21、fabric. sample size shall be in accordance with Table V. The lot shalf be unacceptable if one or more sample units fail to meet any test requirement specified. For those characteristics wherein test results are reported as pass or fail, there shall be no evidence of failure of any test specimen to m
22、eet the requirements as speci- fied. The sample unit for test The 4.2.3.1 Test methods (other than .in FED-STD-191). 4.2.3.1.1 Heat aging. Specimen size shall be as specified in Methods 5102 and 5970 of FED-STD-191. The specimens shall be aged in an oven at a temperature of 158 t 5F for 5 days. Upon
23、 removal from the oven, the specimens shall be conditioned at standard con- ditions for 24 hours and then tested for breaking strength and ad- hesion of coating, method numbers 5102 and 5970, respectively. The percent loss in breaking strength from the unaged specimens shall be reported. The coating
24、 adhesion shall be reported. 8 MIL-C-267128 4.2.2.3.2 Total yardage in samples. The rolls examined shall be those selected for examination of individual rolls as specified in 4.2.2.3.1, The lot shall be unacceptable if the total of the gross lengths of the rolls in the sample is less than the total
25、of the gross lengths marked on the tickets. 4.2.2.4 Examination of ,preparation for delivery requirements. An examination shall be made to determine that packaging, packing and - marking requirements of PPP-P-1136 are complied with. Licensed by Information Handling Services_- - I MIL-C-Eb712B 83 979
26、7906 0385515 O * - Result Pass MI-C-26712B reported as riumerical 1y to the Characteristic Col or Nidth Thickness Weight Breaking strength (cut strip) Resistance to bl oc ki ng Adhesion of coating Breaking strength (cut strip) (after heat aging) Adhesion of coating (after heat aging) Low Temperature
27、 res i stance Lap shear streng th TABLE VI. Requirement Paragraph 3.4 3.3 Table II Table II Table II Table II Table II Table II Table II Table II Table II End item tests. Test Method Visual 5020 5030 5041 51 02 5872 5970 4.2.3. . 4.2.3.1.1 4.2.3.1.2 4.2.3.1.3 Number of determi n- ations per sample u
28、nit 1 5 5 5 5 3 3 5 3 1 3 nearest or Fai 1 - 1/16 inch 0.001 inch 0.1 oz/sq yd 5 lb - 0.1 lb/2 in width 0.5% 0.1 lb/2 in width - 1 lb/ sq in 9 Licensed by Information Handling ServicesMIL-C-26712B 4.2.3.1.2 Low temperature resistance. A 2- by 5- inch specimen of coated fabric, a smooth steel rod 1/8
29、 inch in diameter, and the test jbg asodescribed in Figure 1, shall be placed in an atmosphere of -67 + 2 F. After 24 hours of exposure and without removing the specTmen, rod, and fixture from the low temperature atmosphere, the specimen shall be bent sharply over the rod in order that the back of t
30、he specimen touches within 1/8 inch distance directly be- hind the rod. cracks. The specimen shall then be visually inspected for 4.2.3.1.3 Lap shear strength. A 1-inch wide specimen of the coated fabric shall be overlapped a minimum of 1-inch on another 1-inch wide specimen of the coated fabric. Th
31、e two surfaces shall be cemented or vulcanized together under the same conditions that seams would be made in the manufacture of the intended use item such as an aircraft lifting bag. Six specimens shall be prepared with 3 specimens being exposed to 160 F at 95 percent RH for 5 days prior to testing
32、. Testing shall occur prior to the production manufacturing of the intended use item. The failure of any single specimen to meet the minimum strength requirement shall constitute failure of the entire lot of coated fabric so identified. 5. PACKAGING 5.1 6.2). Packaging. Packaging shall be level A or
33、 C as specified (see 5.1.1 shall be packaged in accordance with the applicable requirements Levels A and C. The cloth, put-up as specified (see 3.5), of PPP-P-1136. 5.2 Packing. 5.2.1 with the applicable requirements of PPP-P-1136. Packing shall be level A, B, or C as specified (see 6.2). Levels A,
34、B, and C. The cloth shall be packed in accordance 5.3 Marking. contract or order, shipments shall be marked in accordance with the appl icabl e requirements of PPP-P-1136. 6. NOTES In addition to any special marking required by the 6.1 Intended use. The coated cloth covered by this specification is
35、intended for use in aircraft pneumatic lifting bags. 10 Licensed by Information Handling Servicesa MIL-C-26712B 11 Licensed by Information Handling ServicesMIL-C-26712B 6.2 Ordering data. Procurement documents should specify the following: Title, number, and date of this specification. Quanti ty des
36、 i red. Color required, if other than black is desired. Level of packaging and packing required. Width and length required. Provisions for deduction for defects (if any). 6.3 A coated fabric identified as Style 59-23-2, cementable type, producedby Chemprene, Inc., has been found to meet the low temp
37、era- ture requirements, and Goodrich cement A-53-B when used with this fabric has been found to meet the lap shear strength requirements. Custodians: Air Force - 20 Navy - AS Preparing Activity: Air Force - 20 Project No. 8305-0741 Rev i ew Act i v i ti es : Air Force - 99 DLA-CT User Activity: Air Force - 45 *V.S. GOVERNMENT PRINTING OFFICE: 1982-505-022/1762 12 Licensed by Information Handling Services
