1、INCH-POUND MIL-DTL-32067 July 12, 2000 SUPERSEDING September 15, 1975 KK-L-254D MILITARY DETAILED SPECIFICATION LEATHER, SHEEPSKIN, CROME TANNED This specification is approved for use by all Department and Agencies of the Department of Defense. 1. SCOPE This Military Detailed Specification covers th
2、e requirements for chrome tanned sheepskin. 1.2. CLASSIFICATION. The leather will be in the following types, classes, and subclasses. TypeA - Hair sheep Type B - Domestic Class 1 - Mildew resistant treated Class 2 - Not mildew resistant treated Subclass a. - Perspiration resistant treated Subclass b
3、. - Not perspiration resistant treated Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Defense Supply Center Philadelphia, Clothing and Textiles Directorate, Attn: DSCP-COC, bld 6-1-D, 700 Robbi
4、ns Ave, Philadelphia, PA 191 11-5096. AMSC NIA FSC 8330 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. T
5、his section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements documen
6、ts cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Non-Government publications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed i
7、n the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS D - 5053 Resistance to Crocking of Leather D - 3495 Hexane
8、 Extraction of Leather D - 2821 Measuring the relative stiffness of leather by means of a torsional wire apparatus D - 6012 Determination of Resistance of glove leather to bleeding D - 4705 Stitch tear strength single hole D - 6076 Shrinkable temperature of Leather D - 2322 Resistance of Chrome-Tann
9、ed white shoe upper leather to artificial perspiration. D - 2096 Colorfastness and transfer of color in the washing of leather D - 2831 Practice for sampling leather for physical and chemical tests. (Applications for copies should be addressed to American Society For Testing and Materials, 100 Barr
10、Harbor Drive, West Conshohocken, PA 19428.) ANSUASQC 21.4 (Applications for copies should be addressed to ANSUASQC American Society for Quality Control 61 1 East Winconsin Ave. , Milwaukee WI 53202) (Non-Government standards and other publications are normally available from the organizations that p
11、repare or distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of Precedence. In the event of a conflict between the text of this document and the references cited herein (except for related associated specifications or s
12、pecification sheets), the text of this document takes precedence. Nothing in this document however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32
13、067 3. REQUIREMENTS 3.1 Materials The strap leather shall be full grain, chrome tanned sheepskin. The flesh side of the leather shall be smooth and free of coarse loose fiber. 3.1.1 Type A, hair sheep. Type A leather shall be made from the skins of the hair sheep of the hair sheep of Brazil, Nigeria
14、, Sudan, Abyssinia, Djeddah, or other origins. Wool, or coarse wool sheepskins, such as Iranian type sheepshins, are not acceptable. 3.1.2 Type B, domestic. Type B leather shall be made from the skins of the domestic sheep. 3.1.3 Leather. Subclass a. When subclass a is specified, glutaraldehyde shal
15、l be incorporated into the 3.2 Physical requirements. 3.2.1 Color. The color of the leather, the method of application (drum, spray or brush), and the degree of dye penetration shall be as specified (see 6.2 and 6.3). When the spray or brush method is required, the surface of the leather to be dyed
16、shall be as specified (see 6.2) 3.2.2 Finish. Unless otherwise specified (see 6.2), a light application of finish and dye containing only sufficient pigment as to assist in making the color uniform shall be applied to the grain surface. The finish shall not shrink or change the appearance of the nat
17、ural grain surface, mar the leather, or camouflage any defect. 3.2.3 Thickness. Unless otherwise specified (see 6.2) the thickness of the leather shall be 2 - +1/2 ounces when examined in accordance with 4.2.2. The leather may be buffed or shaved to obtain the desired thickness . (Note: 1 ounce = 1/
18、64 inch). 3.2.4 Form. The leather shall be in the form of whole skins and shall be trimmed. The area expressed in terms of square feet shall be legible marked in the butt area on the flesh side of the leather. 3.2.5 than 60 degrees when tested as specified in 4.3. Stiffness. At least 80 percent of t
19、he specimens tested shall have stiffness value no greater 3.2.6 Colorfastness (resistance to rubbing). Unless otherwise specified (see 6.2), staining of the dry crock cloth shall be not lower numerically than Munsell Value 9.5 and the staining of the wet crock cloth shall be not lower numerically th
20、an Munsell value 8.5 with the leather is tested as specified in 4.3. 3.2.7 Staining. Unless otherwise specified (6.2), staining of the test pad shall have an expanded AATCC value of not less than 4 when the leather is tested as specified in 4.3 3.2.8 Stitch tearing strength. 3.2.8.1 Type A. At least
21、 80 percent of the specimens tested shall have stitch tearing strength values of not less than 15 pounds when tested as specified in 4.3. 3.2.8.2 Type B. At least 80 percent of the specimens tested shall have stitch tearing strength values of not less than 10 pounds when tested as specified in 4.3.
22、3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 3.2.9 Elongation. At least 80 percent of the specimens tested shall have elongation values of not less than 25 percent when tested as specified in 4.3. The elongation of Type A shall be
23、determined at a load of 25 pounds and the elongation of type B shall be determined at a load of 20 pounds. Any specimen that ruptures or exhibits grain crack below the specified load shall be recorded as a failing specimen. 3.2.10 Shrinkage temperature. Shrinkage of the leather shall not take place
24、at or below 92“ C, when tested as specified in 4.3. 3.2.11 Area stability to perspiration (subclass a). At least 80 percent of the specimens shall have an area loss no greater than 15 percent when tested as specified in 4.3. 3.2.12 Area stability to laundering (subclass a). When specified (see 6.2),
25、 the subclass a leather shall be tested for area stability to laundering and at least 80 percent of the specimens shall have an are loss no greater than 20 percent when tested as specified in 4.3. 3.3. Fungicide. Unless otherwise specified (paragraph 6.2), one of the following leather fungicides is
26、required. 3.3.1 TCMTB. The leather shall contain not less than 1OOppm and not more than 400ppm of active ingredient 2- (thiocyanomethylthio) benzothiazole (TCMTB), (see paragraph 4.4.1). 3.3.2 Ortho- Phenyl Phenol. The leather shall not contain less than 540 ppm and not more than2580 ppm. (see parag
27、raph 4.4.2) 3.3.3 more than 2000 ppm. (see paragraph 4.4.3) Diiodomethyl para Tolysulfone . The leather shall contain not less than 300 ppm and not 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 3.4 Chemical requirements. 3.3.2 The l
28、eather shall conform to the chemical requirements specified in table I, when tested as specified in 4.3. TABLE I Chemical requirements Characteristic Minimum Maximum Chloroform-soluble material, percent / 25.0 Total ash, percent L/ Chromic oxide (percent) L/ PH value 2.5 3.0 9.0 - 1/ Calculated on t
29、he moisture free basis. 3.5 Workmanship. The finished leather shall conform to the quality established by this specification. The occurrence of defect shall not exceed the applicable acceptable levels. 4.0 VERIFICATION. 4.1 as follows: Classification of inspections. The inspection requirements speci
30、fied herein are classified 4.1.2 Certificate of compliance. 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. Sampling for inspection shall be in accordance wi
31、th the provisions of ANSUASQC Z1.4, except where otherwise indicated hereinafter. 4.2.2 Component and material inspection. Components an material shall be tested in accordance with all the requirements of referenced specification, drawings, and standards unless otherwise excluded, amended, modified,
32、 or qualified in this specification or applicable purchase document. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 4.2.3 Examination of the end item. The classification of defects found during the examination shall be in accordance
33、with the lists shown in 4.2.2.1 and 4.2.2.2. The sample unit for these examinations shall be one sheepskin. The lot size shall be expressed in units of one sheepskin. A sample size of 15 and a rejection number of 2 shall be applicable for thickness determinations on lots consisting of 51 or more uni
34、ts of product. Separate examinations shall be performed for visual and dimensional characteristics, but the same sample may be used for each examination. 4.2.3.1 Examination for visual characteristics. Examine Defect Color Finish Not as specified Not dyed as specified Not uniform Unless otherwise sp
35、ecified, grain side not finished. Streaky, flaky, cracked or tacky. Excessively pigmented. Form Not whole sheepskin Quality of leather Any cut hole tear, scratch, brand, vein, wrinkle, cockle Coarse loose fiber or flesh side, broardy area, Flanky area and other imperfections that individually Or col
36、lectively cause more than 12 percent loss in The total area of the leather. 4.2.3.2 Examination for dimensio na1 characteristics. Examine Defect Area (expressed in Terms of square feet) Not as marked on leather Marking Omitted Thickness I/ Not as specified - 1/ Thickness shall be measured in accorda
37、nce with ASTM-D- 18 14 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 4.3 End item testing. The methods of testing specified in ASTM wherever applicable and as listed in table II, shall be followed. Sampling procedure and location fr
38、om which the sample unit is to be obtained shall be in accordance with ANSUASQC 21.4. All test reports shall contain the individual values utilized in expressing the final result . The lot shall be rejected if any one of the following conditions exists: a. More than three test specimens fail to meet
39、 stiffness requirements. b. More than three specimens fail to meet stitch tearing strength requirements or more than 3 specimens fail to meet elongation requirements. c. When subclass a is specified, for than 3 specimens fail to meet perspiration resistance requirements. d. When subclass a is specif
40、ied and the leather is required to be tested for area stability to laundering (see 6.2), more than 3 specimens fail to meet the laundering requirement e. One or more specimens fail to meet any of the remaining requirements applicable to The sample unit. f. Any composite test result fails to meet the
41、 specified requirement TABLE II Tests Requirement - to Composite Characteristic paragraph sample Requirement Applicable Test Sample method unit Material identification 3.1 Stiffness 3.2.5 colorfastness 3.2.6 Staining 3.2.7 Stitch tear strength 3.2.8 - 1/ - ASTM-D-2821 X ASTM-D-505 3 X ASTM-D- 60 1 2
42、 X AS TM- D - 47 05 X 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 Elongation 3.2.9 Shrinkage temperature 3.2.10 ASTM-D- 60 1 2 X ASTM-D-6076 X WLE II Test (cont Area stability to perspiration (subclass a) 3.2.12 Area stability to
43、laundering (subclass a) 3.2.11 Fungicide 3.3 Chloroform soluble Material 3.3.2 Total ash 3.3.2 Chromic oxide 3.3.2 pH value 3.3.2 ASTM-D-2322 2.1 X ASTM-D-2096 31 X 3.4 X ASTM-D-3495 X ASTM-D-2617 - X AS TM- D - 2 8 07 - X ASTM-D-28 10 X - 11 - 21 - 31 4.4 Unless otherwise specified, a certificate o
44、f compliance is required and will be acceptable for the stated requirement. The suction flask shall contain 15 remove necessary amount of acetonitrile and inject Note: Samples may have to be diluted further to fall within standard curve. 4.4.3.5 Testing equipment: a. b. C. d. e. HPLC System with var
45、iable UV detector and integrating computer. Suitable syringe and glassware. A micro-Bondapak C18 column (Waters Associates P/N 2734) or equivalent. 0.45-micron polycarbonate filters (Nuclepore Corporation, Catalog No. 11 1107) or equivalent. Calculator capable of doing linear regression. Reagents: A
46、cetonitrile (Chromatographic grade). 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32067 4.4.3.5.1 Typical mobile phase. Mix 550ml of distilled water and 450ml of acetonitrile. Filter and degas the solution. The concentration may be varie
47、d to meet system suitability requirements Whhiige 50% to 40 4.4.3.5.2 Typical chromatographic conditions: Injection Volume 20 Microliters Flow 2.5 mlminute Detector 235 nm 4.4.3.6 System suitability. Inject the highest working standard until 2 percent agreement is reached between two successive inje
48、ctions. Chromatograph for approximately 15 minutes. Determine that, after the solvent front, one impurity peak elutes before the major peak. Elution formo no io do me th yl- p ara- t o 1 ylsulfo ne is ab0 ut 6 minu tes and for Diio do me th yl- p ara- t o 1 ylsulfo ne is about 8.5 minutes. 4.4.3.7 P
49、rocedure. Inject each standard and sample preparation in duplicate allowing each injection to run for at least 15 minutes. Measure the peak response for the Diiodomethyl-para- to 1 ylsulfo ne. Note: The run time may have to be increased for samples with late eluting peaks. Perform a linear regression of peak response (area) versus concentration for each of the components. For each component: Concentration (ppm) in leather = Con
