1、MIL-M-44104A 20 October 1987 SUPERSEDING MIL-M-44104 27 May 1983 MILITARY SPECIFICATION MAT, SLEEPING * 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 sleeping mat. 2. APPLICABLE DOCUMENTS * 2.1 Govern
2、ment documents. * 2.1.1 Documents. The following documents form a part of this document 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 supplem
3、ent thereto, cited in the 0 solicitation. SPECIFICATIONS FEDERAL PPP-B-60 1 - Boxes, Wood, Cleated-Plywood PPP-B-636 - Boxes, Shipping, Fiberboard MILITARY MIL-T-5038 - Tape, Textile and Webbing, Textile, Reinforcing, Nylon MIL-T-43548 - Thread, Polyester Core: Cotton-, Rayon-, or Polyester-Covered
4、Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in 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 Improve
5、ment Proposal (DD Form 1426) appearing at the end of this document or by letter. r Y- msc NIA THIS DOCUMENT CONTAINS PAGES. y FSC 8465 _ DISTRIBUTION STATEMENT AI -Gproved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without lice
6、nse from IHS-,-,-MIL-M-44104A STANDARDS FEDERAL 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 MIL-STD-129 - Marking for Shipment and Storage Attributes DRAWINGS U.S. ARMY NATICK RESEARCH, DEVELO
7、PMENT, AND ENGINEERING CENTER 2-3 -43 8 - Mat, Sleeping (Copies of documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) * 2.2 Other publications. The following documents form
8、a part of this document 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 specified, the issues of documents not listed in the DODISS shall b
9、e the issues of the nongovernment documents which are current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 3575 - Flexible Cellular Materials Made From Olefin Plastics D 3951 - Standard Practice for Commercial Packaging (Application for copies should be addres
10、sed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) * 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, howeve
11、r, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Standard sample. Standard samples will be furnished by the Government. The color of the foam (see 3.4) shall be equal to the standard sample (see 6.3). 2 Provided by IHSNot for Resal
12、eNo reproduction or networking permitted without license from IHS-,-,-MIL-M-49104A 84 m 9999906 0399468 T m MIL-M-44104A * 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). O 3.3 -Materials (see 6.5).
13、3.4 Mat body. The body of the mat shall be manufactured from closed cell expanded cross-linked polyethylene foam. The material shall be physically blown using nitrogen, or chemically blown using a nitrogen blowing agent which is non- toxic, and whose products of decomposition are non-toxic. The colo
14、r.of the foam shall be olive drab in accordance with the standard sample. The length of the . mat shall contain not more than one lateral weld. 3.4.1 Securing tapes. The tapes shall be 314 inch wide, olive drab color, 1 conforming to type III of MIL-T-5038. The position and length of the tapes shall
15、 conform to Drawing 2-3-438. Ends of securing tape shall be seared. 3.4.2 Patches. The patches shall be cut from a polychloroprene coated woven nylon cloth, black or olive drab in color and uniformly coated on the both sides of the cloth. “he location and dimensions of the patch shall conform to Dra
16、wing 2-3 -43 8. 3.4.3 Base nylon cloth. The nylon base cloth shall be constructed with 28 to 33 yarns per inch for the warp and filling and shall weigh 5.9 to 10 ounces per square yard. 3.4.4 Coated base cloth. 19.2 ounces per square yard. The weight of the coated base cloth shall be 15 to O 3.4.5 A
17、dhesive. The patches shall be secured to the mat with a polychloro- prene based self-vulcanizing adhesive, or an approved alternative, abrading the surface of the mat and patch as necessary. required to remove patches from the mat) shall be not less than 11.2 pounds when tested as specified in 4.4.4
18、. The patch adhesion (peel force 3.4.6 Thread. The threads shall be cotton-, rayon-, or polyester-covered polyester thread conforming to MIL-T-43548, ticket number (size 16), three or four plies, color Olive Drab S-1, CA 66022. 3.5 Construction. The construction shall conform in all respects to Draw
19、ing 2-3-438 and as specified herein. The physical properties of the body of the mat shall conform to the requirements specified in table I when tested as specified in 4.4.4. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-44104A TABLE I. Phys
20、ical properties of expanded polyethylene mat body Property Requirement Tensile strength, p.s.i., min 70 Elongation, percent , min 100 Tearing resistance, lbs/inch, min 15 Density, lbs/cu ft, max 3.6 Shrinkage, percent, max 15 Compression strain: 10 psi, percent, max 30 psi, percent, max Compression
21、set: 22 hrs at room temp, percent, max 22 hrs at O degrees F, percent, max 35 65 45 55 Water absorption, percent, max 17 Weld strength per inch width, min 16.9 lbs (breaking strength) * 3.5.1 Stitches, seams and stitchings. All stitches, seams and stitching shall conform to type 301 of FED-STD-751 w
22、ith 6 to 8 stitches per inch, The type of seam and stitching shall conform to Drawing 2-3-438 and as specified herein. End of stitching shall be overlapped 1/2 inch to prevent ravelling. 3.5-2 Thread tension, Thread tension shall be maintained so that there will be no loose stitching resulting in lo
23、ose bobbin or top thread, or excessively tight stitching resulting in puckering of the materials sewn. The lock shall be embedded in the materials sewn. * 3-5.3 Repairs of type 301 stitching. Repairs of type 301 stitching shall be as follows: a. When thread breaks or bobbin run-outs occur during sew
24、ing, the stitching shall be repaired by restarting the stitching a minimum of 1/2 inch back of the end of the stitching. b. Thread breaks or two or more consecutive skipped or run-off stitches noted during inspection of the item (in-process or end item) shall be repaired by over-stitching. The stitc
25、hing shall start a minimum of 1/2 inch back of the 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-44104A defective area, continue over the defective area, and continue a minimum of 1/2 inch beyond the defective area onto the existing stitchi
26、ng. stitching shall be repaired by removing the defective stitching without damaging the material and restitching in the required manner. - l/ Loose or tight L/ When making the above repairs, the ends of stitching are not required to be backstitched. 3.5.4 Automatic stitching, Automatic machines may
27、 be used to perform any of the required stitch patterns provided the requirements for the stitch pattern, stitches per inch, and size and. type of thread are met, and at least three or more tying, overlapping, or back stitches are used to secure the ends of the stitching. As an alternate, 11 to 14 s
28、titches per inch may be used. * 3.5.5 Thread ends. All thread ends that are visible on the finished item shall be trimmed to a length of not more than 1/4 inch. * 3.6 Workmanship. The mat shall conform to the quality of product established by this document and the occurrence of defects shall not exc
29、eed the applicable acceptable quality levels. 4. QUALIIY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. in the contract or purc
30、hase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this document where such inspections
31、 are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise specified * 4.1.1 Responsibility or compliance. All items must meet all requirements of The inspection set forth in this document shall become a part sections 3 and 5. of the contractors ove
32、rall inspection system or quality program. of any inspection requirements in the document shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conf
33、ormance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defect ive material. The absence * 4.1.2 Certificate of compliance. When certificates of compliance are submitted, the Government reserves the right to in
34、spect such items to determine the validity of the certification. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-44104A 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article
35、 inspection (see 4.3). b. Quality conformance inspection (see 4.4). 4.3 First article inspection. When a first article is required (see 6.21, it shall be examined for the defects specified in 4.4.2 and 4.4.3. The presence of any defect shall be cause for rejection of the first article. 4.4 Quality c
36、onformance inspection. Unless otherwise specified, sampling for inspection shall be performed in accordance with MIL-STD-105, 4.4.1 Component and material inspection. In accordance with 4.1, components and materials shall be inspected in accordance with all the requirements of referenced documents u
37、nless otherwise excluded, amended, modified, or qualified in this document or applicable purchase document. In addition, the testing shall be performed on components listed in table II for characteristics noted. Unless otherwise indicated, testing shall be conducted in accordance with FED-CTD-191. A
38、ll requirements are applicable to the sample unit. All test reports shall contain the individual values utilized in expressing the final results. Unless otherwise specified in subsidiary documents, sampling shall be in accordance with the following: Lot size (yards) Sample size 800 or less 801 up to
39、 and including 22,000 22,001 and over 2 3 5 The lot shall be unacceptable if one or more sample units fail to meet any test requirement specified. testing each component shall be in accordance with applicable subsidiary specifications and as follows: The unit for expressing lot size and sample unit
40、for Component Lot size unit expressed as Sample unit for testing Coated cloth for adhesive Yards patches 1/3 sq. yard TABLE II. Component tests Requirement Test Component Characteristic paragraph method Patches Composition Coating 6 3b4.3 3.4.3 i/ visua 1 Provided by IHSNot for ResaleNo reproduction
41、 or networking permitted without license from IHS-,-,-MIL-M-44104A TABLE II. Component tests (contd) Re qui remen t Test Component Characteristic paragraph method Base cloth Coated cloth Adhe s ive Yarns per inch Weight Weight Composltion 3.4.4 5050 l/ 3.4.4 5040 z/ 3.4.5 3.4.6 5041 s - l/ A certifi
42、cate of compliance shall be submitted and will be acceptable for the stated requirement. 4.4.2 End item visual examination. The end item shall be examined for the defects listed below. The lot size shall be expressed in units of mats. The sample unit shall be one complete mat. The inspection level s
43、hall be II and the acceptable quality level (AQL), expressed in terms of defects per hundred units, shall be 4.0. Examine Defect Securing tapes Any tape missing or not properly located Not color specified Ends not seared Adhesive patch Stitching Mat body Any patch missing or not properly located Not
44、 adhered over entire area Not color specified Not uniformly coated on both sides Number of stitches per inch more Not overstitched as required or less than required Any cut, split, tear, hole, or crack Not uniform, contains large voids More than one lateral weld in any mat Weld not complete Not clea
45、n or presence of foreign matter 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* 4.4.3 End item dimensional examination. The end item shall be examined for conformance to the dimensions shown on the drawing. the specified tolerance shall be classi
46、fied as a defect. expressed in units of mats. level shall be S-3 and the AQL, expressed in terms of defects per hundred units, shall be 6.5. Any dimension not within The lot size shall be The sample unit shall be one mat. The inspection * 4.4.4 End item testing, The end item shall be tested for the
47、characteristics listed in table III. The lot size shall be expressed in units of one mat. The sample unit shall be one mat. S-2. Any test failure shall be cause for rejection of the lot. For all testing, the inspection level shall be TABLE III. End item tests Specification reference Results reported
48、 as Characteristic Requirement Test method Pass or fail Tensile strength Table I ASTM D 3575 X Elongation Table I ASTM D 3575 X Tearing resistance Table I ASTM D 3575 X Density Table I ASTM D 3575 Shrinkage Compression strain: 10 p.s.i. 30 p.s.i. Compression set: 22 hrs at room temp 22 hrs at OOF Wa
49、ter absorption Weld strength Patch adhesion Table I Table I Table I Table I Table I Table I Table I 3.4.6 4.5.3 ASTM D 3575 ASTM D 3575 ASTM D 3575 ASTM D 3575 ASTM D 3575 4.5.1 4.5.2 X * 4.4.5 Packaging examination. The fully packaged end items shall be examined for the defects listed below. The lot size shall be expressed in units of shipping containers. packaged. The inspection level shall be S-2 and the AQL, expressed in terms of defects
