1、MIL-M-Ll37Ll5B BLl 7799706 0397383 T MIL-M-43945B 18 July 1988 SUPERSEDING 31 March 1983 MIL-M-43945A MILITARY SPECIFICATION MASK, EXTREME COLD WEATHER This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This document covers a mask
2、 assembly consisting of one face mask, one bib, and two oro-nasal masks. The oro-nasal masks are subject to replacement, and this document may be used to procure replacement quantities (see 6.5). 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications, standards, and handbooks. The
3、following specifications, standards, and handbooks form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement
4、 thereto, cited in the solicitation. SPEC1 FI CATIONS FEDERAL A-A-50083 - Bag, Plastic, Folded Garment JJ-W-155 - Webbing, Textile, (Cotton, Elastic) QQ-A-250/1 - Aluminum 1100, Plate and Sheet Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in
5、improving this document should be addressed to: U.S. Army Natick Research, Development, and Engineering Center, Natick, MA 01760-5014 by using the self- addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 8415 DISTRI
6、BUTION STATEMENT A. Approved for public release; distribution is unlimited. THIS DOCUMENT ONTAINS 30 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-VIL-M-LI37LI5B 89 W 7977706 0377382 1 I DDD-L-20 DDD-T-86 PPP -B - 6 3 6 MILITARY MIL-T-3530 M
7、IL-F-2 1840 MIL-L-35 O7 8 MIL-C-43247 MIL-T-43548 MIL-T-435 66 - Label: For Clothing, Equipage, and Tentage, - Tape, Textile; Cotton, General Purpose - Boxes, Shipping, Fiberboard (General Use) (Unbleached, Bleached, or Dyed) - Thread and Twine: Mildew Resistant or Water - Fastener Tapes, Hook and L
8、oop, Synthetic - Loads, Unit: Preparation of Semiperishable Repellent Treated Subsistence Items; Clothing, Personal Equipment and Equipage, General Specification For - Cloth, Knitted, Nylon, Tubular, Stretch Type - Thread, Polyester Core: Cotton-, Rayon-, or - Tape, Textile, Cotton or Polyester, Gen
9、eral Purpose, Polyester-Covered Natural or in Colors STANDARDS FEDE RA L FED-STD-191 - Textile Test Methods FED-STD-751 - Stitches, Seams, and Stitchings MIL I TARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage MIL-STD-147 -
10、Palletized Unit Loads MIL-STD-731 - Quality of Wood Members for Containers and Pallets (Copies of specifications, standards, and handbooks required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting acti
11、vity.) * 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise sp
12、ecified, the issues of documents not listed in the DODISS shall be the issues of the nongovernment documents which are current on the date of the solicitation. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-433458 84 m 9777706 0397383 3 m AM
13、ERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 1564 - Testing Slab Flexible Urethane Foam D 3951 - Standard Practice for Commercial Packaging (Copies should be obtained from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) (Nongovernment standards an
14、d other publications are normally available from the organizations which prepare or which 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 specificati
15、on and the references cited herein, the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Guide sample. Samples, when furnished, are solely for g
16、uidance and information to the contractor (see 6.3). Variation from this document may appear in the sample, in which case this document shall govern. * 3.2 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3, 6.2, and 6.4)
17、. 3.3 Materials (see 6.7). 3.3.1 Basic material - face mask. The basic material for the face mask, chin piece, and the nose-bridge stiffener cover shall be made from nylon knitted and cotton jersey doth laminated together. The components and lamination shall comply with 3.3.1.1, 3.3.1.2, 3.3.1.3 and
18、 3.3.1.4. 3.3.1.1 Outer layer. The material for the outer layer shall be nylon knitted cloth conforming to class 1 of MIL-C-43247, except the color shall be chemically bleached white and may be supplemented with optical brighteners which fluoresce to the blue region and the requirement for colorfast
19、ness shall not apply. The degree of brightness shall match the standard sample. 3.3.1.2 Inner layer. The material for the inner layer shall be a flat (jersey) stitch knitted cloth, made of single or 2-ply combed cotton yarns having a minimum of 30 wales and 36 courses per inch, a minimum bursting st
20、rength of 55 pounds, and a minimum weight of 3.3 ounces per square yard. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - MIL-M-439458 4 m 3999906 0377389 5 m MIL -M -4 3 945 B The cloth shall not shrink nor elongate more than 12 percent in the l
21、ength (wale) or width (course) direction. It shall be scoured and bleached. The starch and protein content, including chloroform-soluble material of the finished cloth (non-fibrous material content), shall not exceed 6.0 percent and the pH value of the finished cloth shall be no less than 6.0 nor mo
22、re than 8.0. The finished cloth shall meet these requirements when tested as specified in 4.4.1. 3.3.1.3 Polyurethane foam. The foam to be adhered to the nylon and cotton basic materials (see 3.3.1.1 and 3.3.1.2) shall be an unpigmented polyurethane foam with a minimum thickness of 0.235 inch and a
23、maximum of 0.250, a maximum density of 2.0 pounds per cubic foot, a minimum tear strength of 3.5 pounds per inch thickness, and a maximum compression set of 15 percent, when tested as specified in 4.4.1. 3.3.1.4 Bonding of basic cloths to foam. One side of the polyurethane foam shall be flame lamina
24、ted to the outer layer nylon base fabric (see 3.3.1.1) and the other side shall be flame laminated to the face (wale) side of the cotton cloth (see 3.3.1.2). 3.3.2 The basic material - bib. The basic material for the bib shall be . made from nylon tricot and cotton jersey cloth laminated together. T
25、he components and lamination shall comply with 3.3.2.1, 3.3.2.2, 3.3.2.3, and 3.3.2.4. 3.3.2.1 Outer layer. The outer layer shall be white nylon tricot cloth knitted on a 28-gage tricot machine using 40-denier nylon yarn, having a minimum of 37 wales and 35 courses per inch, and a minimum bursting s
26、trength of 80 pounds. The weight of the cloth shall be not less than 1.8 nor more than 2.2 ounces per square yard. The cloth shall not shrink nor elongate more than 12 percent in length (wales) or width (course) direction when tested as specified in 4.4.1. 3.3.2.2 Inner layer. The material for the i
27、nner layer shall be flat (jersey) stitch knitted cloth conforming to the requirements of 3.3.1.2. 3.3.2.3 Polyurethane foam. The foam to be adhered to the nylon tricot and cotton jersey cloths (see 3.3.2.1 and 3.3.2.2) shall be an unpigmented polyurethane foam with a minimum thickness of 0.089 inch
28、and a maximum of 0.099 inch, a maximum density of 2.0 pounds per cubic foot, a minimum tear strength of 3.0 pounds per inch thickness, and a maximum compression set of 20 percent when tested as specified in 4.4.1. 3.3.2.4 Bonding of basic cloths to foam. One side of polyurethane foam shall be flame
29、laminated to the float side of the outer layer nylon knit tricot cloth (see 3.3.2.1) and the other side shall be flame laminated to the face (wale) side of the cotton jersey knitted cloth (see 3.3.2.2). 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
30、-,-MIL-M-3945B 84 W 7977706 0377385 7 * 3.3.3 Oro-nasal mask. The oro-nasal mask consists of two air filtering masks (see table II (ODeration 3) and shall conform to Minnesota Mining and Manufacturing Co., non-toxic nuisance dust particle mask, Model No. 8500, the 3M Air Warming mask, or the Gerson
31、Co. mask, Model No. 1501, or equal (see 6.6). (Two finished oro-nasal masks, each one consisting of two air filtering masks with filler, are to be furnished with each cold weather mask.) 3.3.4 Oro-nasal barrier mask filler and nose-bridge cushion. The material for the barrier mask filler (see table
32、II (operation 3) and for the nose- bridge cushion shall be a natural or white, plain jersey-knit cotton cloth, napped on the inside, having a minimum of 19 wales and 22 courses per inch, a minimum weight of 10.5 ounces per square yard and a minimum bursting strength of 75 pounds when tested as speci
33、fied in 4.4.1. 3.3.5 Malleable nose-bridge stiffener. The material for the nose-bridge stiffener shall be O temper, aluminum sheet, 0.020 inch thick conforming to QQ-A-250/1. 3.3.6 Eyeglass-retention holder. The material for the eyeglass-retention holder shall be bleached cotton elastic webbing, 1/2
34、 inch-wide, conforming to type I, class 1 of JJ-W-155, except it need not be water repellent or mildew resistant treated. 3.3.7 Adjustable head-harness and pull-tab on chin adjustment. The material for the adjustable head-harness and pull-tab on chin adjustment shall be a bleached or unbleached cott
35、on elastic webbing, 1-1/4 inches wide, conforming to type I, class 9 of JJ-W-155. 3.3.8 Visual-port connector. The material for the connector for the visual-port shall be bleached or unbleached, cotton elastic webbing, 5/16 inch wide, conforming to type II, class 1 of JJ-W-155. 3.3.9 Pull-tab and bi
36、nding for oro-nasal mask. The material for the pull- tab and binding for the oro-nasal mask shall be white cotton tape, 1/2 inch wide, conforming to type I or II, class 1 or 2 of DDD-T-86. Alternatively, the pull-tab and binding shall be 1/2 inch cotton tape conforming to type I, class 1 or 2 of MIL
37、-T-43566. 3.3.10 Fastener closures. The fastener tapes shall be white nylon, hook and loop, conforming to type I, class 1 of MIL-F-21840. The hook tape for the nose-bridge and the loop tape for the oro-nasal barrier shall be 5/8 inch wide. All other hook and loop tapes shall be 1 inch wide. 3.3.11 T
38、hread. The thread for stitching the mask shall be polyester The thread shall be water repellent treated cotton-covered or rayon-covered, unbleached or white, Ticket Nos. 50 and 70 conforming to MIL-T-43548. conforming to type II, class 3 of MIL-T-3530, except that the test to determine dynamic absor
39、ption of the treated thread shall be Method 4504 of FED-STD-191 in lieu of the test specified. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-U-43745B 84 W 7777706 037738b 7 - MIL-M-4 39 45B 3.4 Labels. Each mask shall have an identification lab
40、el and instruction sheet. 3.4.1 Identification label. The identification label shall conform to type VI, class 1 of DDD-L-20. 3.4.2 Instruction sheet. An instruction sheet measuring not less than 7-1/2 by 7-1/2 inches shall be packed with each mask. The printing media shall be black, printed on whit
41、e paper with capital letters 1/8 inch in height and lower case letters 1/16 inch in height and shall contain the following information: INSTRUCTIONS FOR USE MASK, EXTREME COLD WEATHER Donning instructions: 1. Detach nose-mouth covering part of mask and detach the bib. 2. Assure that chin pocket adju
42、ster is firmly connected. 3. Place chin into mask chin pocket. 4. Place mask nose-bridge over bridge of nose and hold entire mask in 5. Grasp tab on the back strap of mask, pull strap around back of head and 6. 7. If mask is too loose, separate chin pocket adjuster, pull ends closer 8. If mask is to
43、o tight, separate chin pocket adjuster, spread ends place with one hand. firmly attach tab to loop fastener on right side of mask. Center top strap of mask on head. together, and reconnect firmly. further apart, and reconnect firmly. NOTE: Chin pocket adjuster affects position of eye holes and nose-
44、bridge. Do not loosen chin pocket adjuster once it is properly fitted and adjusted. 9. Press down on nose-bridge stiffener bar in order to mold mask to face. 10. Replace nose-mouth covering and attach firmly to loop fastener around the opening. 11. If glasses are to be worn, place one leg of the gla
45、sses inside center elastic strap connecting eye opening, feed glasses through until centered on bridge of nose, and place each leg into the elastic glasses holder on each side of mask. 12. If required, replace bib. 13. To remove mask, simply pull back strap tab. Use of bib: Bib is provided when addi
46、tional protection to throat and neck is required. Bib should be attached to lower part of face mask by means of hook and loop fasteners. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-M-43745B BLI m 777770b 0397387 O m MIL -M - 4 3 9 4 5B Lau
47、ndry instruction: Wash all parts by hand in hot soapy water. Rinse in clear water and hang up to drip-dry in room temperature. DO NOT WRING OR TUMBLE DRY as such mechanical action will distort the nose-bridge stiffener. 3.5 Design. The mask is a contoured covering for the face; it includes a chin ad
48、justment feature, with an elastic adjustable head harness, a visual port connected by an elastic strap, eyeglass retention holders, a padded malleable aluminum nose-bridge stiffener, a removable oro-nasal barrier mask, and a bib-type throat covering that attaches to the face mask by hook and loop fa
49、stener tapes. 3.5.1 Figure. Figure 1 is furnished for information purposes only. To the extent of any inconsistencies between the written document and the figure, the document shall govern. 3.5.2 Patterns. Standard patterns will be furnished by the Government. The standard patterns shall not be altered in any way and are to be used as a guide for cutting the contractors working patterns. The patterns provide 1/8-inch trim-off for overedging the peripher
