1、-. MIL-L-Lt0069D 3 9999906 0370653 O I ./-37-% 0- MIL-L-40069D 4 November 1980 SUPERSEDING MIL-G 400 69 C 20 January 1971 1IILITARY SPECIFICATION LEATHER, CATTLEHIDE CHROHE TANNED , COLD-CLIMATE This specification is approved for use by all Departments and Agencies of the Department of Defence. 1. S
2、COPE 1.1 Scope. This specification covers chrome tanned cattlehide leather (see 6.1) . 9.2 Classification. The leather shall be furnished in the following types and classes as specified (see 6.2): Type I - Sides Type II - Backs Type III - Bends Type IV - Double shoulders Class 1 - Mlclev resistant t
3、reated Class 2 - Not mildew resistant treated 2, APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this speci- fication to the extent specified herein. Beneficial comments (recommendati
4、ons, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Natick, NA 01760 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. US Army Natick Resear
5、ch and Development Laboratories, FSC 8330 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 - _. - - - MIL-L-40069D 83 W 7777706 0370652 2 9 MIL-L-40069D SPECIFICATION MILITARY MIL-L-43432 - Leather, Packaging and Packing Of. STANDARD FEDERAL FED-STD
6、-311 - Leather, Nethods of Sampling and Testing. (Copies of specifications, standards, drawings and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting 0fficr.r.) 3. REQUIREMENTS 3.1 H
7、aterial. Unless otherwise specilied (see 6.2), the leather shall be full grain or corrected grain cattlehide. 3.2 Tannage. The leather shall be chrome tanned. 3.3 Physical requirements. 3.3.1 Trim (form) and area. The trim of the sides, backs, bends or double shoulders shall conform with the definit
8、ions for sides, backs, bends, or double shoulders as listed under “Definition of Terms“ in FED-STD-311. The area expressed in terms of square feet shall be legibly marked in the butt area on the flesh side of the leather except that double shoulders shall be marked near the head area. 3.3.2 Thicknes
9、s. The thickness of the leather shall be as specified (see 6.2). 1/64 inch). A tolerance of 2 1/2 ounce shall be permitted (NOTE: 1 ounce = 3.3.3 Color. The color of the leather shall be as specified (see 6.2). The color may be applied by brush (surface) or drum dyeing. not penetrate the entire thic
10、kness of the leather. The color need * 3.3.4 Finish. Unless otherwise specified (see 6.2), a finish shall not be applied to the leather. When a finish is specified, the color of the finish shall match the color of the dye. Unless otherwise specified (see 6.2), the leather shall be smooth plated. The
11、 color shall be uniform throughout the grain surface and the color shall be uniform throughout the flesh surface, The tanned leather shall be lubricated in such a manner as to provide the required flexibility under extreme cold conditions (see 6.4) . 2 Provided by IHSNot for ResaleNo reproduction or
12、 networking permitted without license from IHS-,-,-NIL-L-40067D 83 SP 7777906 0370653 4 MIL-L- 40 O 6 9D 3.3.5 Colorfastness. The leather shall be tested for resistance to wet and dry crocking in accordance with 4.3. crocking equal to or better than the standard sample (see 6.3). standard sample is
13、available the staining of the dry.cloth shall be not lower numerically than I$unsell value 9,0 and staining of the wet cloth shall be not lower numerically than Ihnsell value 8.5. When the color of the leather is natural as produced by the tanning agents, the leather shall not be tested for crocking
14、. The leather shall show fastness to When no 3.3.6 Breaking strength. At least 80 percent of the specimens tested shall meet the breaking force values specified in table I, when tested as specified in 4.2.2.2. TABLE I, Breaking force Thickness (ounces) Breaking force, minimum (pounds) 2 to less than
15、 5 30 5 to 6-112 70 7 to 8-112 125 9 and up 175 * 3.3.7 Eiongation. At least 80 percent of the specimens tested shall have elongation values no greater than 25 percent when tested as specified in 4.2.2.2. For leather less than 5 ounces in thickness, the elongation shall be determined at a load of 20
16、 pounds. elongation shall be determined at a load of 50 pounds. For leather 5 ounces or greater in thickness, the 3.3.8 Stiffness. The leather shall have a load-scale reading no greater than the values shown in table II when tested as specified in 4.2.2.2. TABLE II. Stiffness Thickness (ounces) Load
17、 scale reading (maximum) 2 to 6-112 7 and up 30.0 60.0 3.3.9 Shrinkage. The leather shall not shrink before the temperature reaches 98OC nor shall the leather shrink when subjected to a temperature of 98OC f 0.5OC for a period of 30 seconds when tested as specified in 4.2.2.2. 3.4 Chemical requireme
18、nts. .The leather shall conform to the requirements of table III, when tested as specified in 4.2.2.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-may use his own or any other facilities suitable for the performance of the inspection requirements
19、 specified herein, unless disapproved 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 assure supplies and services conform to prescribed requirements . 4.1.1 Certificate of compliance
20、. Where certificates of compliance are submitted, the Government reserves the right to check test such items to determine the validity of the certification. * 4.2 Quality conformance inspection. Unless otherwise specified, inspection shall be performed in accordance with FED-STD-311. 4.2.1 Component
21、 and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance with all the requirements of referenced specifications, drawings and standards, unless otherwise excluded, amended, modified, or qualified in this specification or applicable purchase document
22、. .fc 4.2.2 End item inspection. 4.2.2.1 End item examination. The defects found during the examination of the leather for visual and dimensional characteristics shall be in accordance with 4.2.2.1.1 and 4.2.2.1.2. The sample unit for these examinations shall be one side, back, bend, or double shoul
23、der. The lot size shall be expressed in units of one side, back, bend, or double shoulder. Any sample unit containing one or 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-more defects shall be classified as a defective unit. examinations shall be
24、 performed in accordance with FED-STD-311 except that a sample size of 15 and a rejection number of 2 shall be applicable for thickness determinations on lots consisting of 51 or more units of product. Separate examinations shall be performed for visual and dimensional characteristics, but the same
25、sample may be used for each examination. Sampling for these 4.2.2.1.1 Visual characteristics. Examine Trim Defect Not as specified. - Color Finish Not as specified. Leather has application of finish (except when speci- fied) . Flesh or grain surface not uniform in color. Not smooth plated (or not em
26、bossed as required when specified) . Quality of leather Not full grain or not corrected grain (see 6.2). Stain or other foreign matter. Any of the following defects which individually or collectively cause more than a 12 percent loss in the area of the leather: coarse or loose flesh, cut, scratch, h
27、ole, brand hip mark, rough shoulder, or other surface imperfections. - NOTE: Light well-healed scratches or grub holes, light fat wrinkles, or slight stains shall not be classified as defects. 4.2.2.1.2 Dimensional characteristics. Defect - Examine Area (expressed in terms of square Less than area m
28、arked on the leather. feet) Marking Omitted. Thickness i/ - Not as specif ied . i/ Thickness shall be determined in accordance with Method 1011 of FED-STD-311, except that no individual measurement shall be less than the minimum or greater than the maximum specified. - 5 Provided by IHSNot for Resal
29、eNo reproduction or networking permitted without license from IHS-,-,-_ - - MIL-L-YOObSD 83 9999906 0390656 T - MIL-L-40069D 4.2.2.2 End item testing, The methods of testing specified in FED-STD-311, wherever applicable and as listed in table IV, shall be followed. procedure and location from which
30、the sample unit is to be obtained shall be in accordance with FED-STD-311. dividual values utilized in expressing the final result. rejected if any one of the following conditions exists: Sampling All test reports shall contain the in- The lot shall be a, Hore than three test failures occur for brea
31、king force or elongation. b. More than one test failure occurs for the remaining requirements applicable to the sample unit, C. Any composite test result fails to meet the standard requirement, TABLE IV. End item tests Requirement applicable to Requirement Test Sample Composite Characteris tic parag
32、raph method unit: sample Material ident if icat ion Tannage Colorfastness Breaking strength Elongation Stiff ness Shrinkage Chlorof orm-soluble material pH value Chromic oxide Paranitrophenol, class 1 3.1 3.2 3.3.5 3.3.6 303.7 3.3.8 3.3.9 3.4 3.4 3.4 305 11 11 3071 2021 2021 4.3,1 7011 6341 6621 651
33、5 6 711 - i/ A certificate of compliance shall be submitted and will be acceptable for the requirement stated. 4,2,3 Packaging inspection. An examination shall be made in accordance with the provisions of MLL-L-43432 to determine that preservation, packing and marking comply with the section 5 requi
34、rements. 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-,-,-_-_ _ -_Ip_ - MIL-L-LlOOb9D 3 M 9997906 0390658 3 M MIL-L-40069D * 6.4 Flexibility of cold clim
35、ate leather. Cold climate leather of the desired flexibility has been produced successfully by the following methods: (a) By incorporating into the leather small amounts of fat-liquors or other lubricants, drying of the leather, and extraction of the dried leather with a fat solvent to reduce its ch
36、loroform- soluble materials to 5.0 percent or less. NOTE: Paramtrophenol is soluble in chloroform. Consideration should be given to this fact before extracting with chloroform. (b) By incorporating into the leather, lubricants that do not appreciably stiff en at low temperatures . 6.5 Changes from p
37、revious issue. The margins of this specification are marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in
38、these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue . Custodians : Preparing act ivi ty : Army - GL Savy - 1i.Tu Air Force - 99 Review activities: Army - HD DLA - CT User activities: Amy - AR Navy - Pic 8 Army - GL Project No. 8330-0182 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
