1、MIL-M-43968A 12 Jul 85 SUPERSEDING MIL-M-43968 25 Jul 1977 MILITARY SPECIFICATION MATTRESS, PNEUMATIC, (INSULATED) This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for one type of - p
2、neumatic mattress in one size and two classes. 1.2 Classification. Pneumatic mattresses may be either of the following classes. Class 1 - Cemented seams, I - beam construction Class 2 - Molded seams, C - beam construction 2. APPLICABLE DOCUMENTS 2.1 Iusues of documents. The following documents of th
3、e issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL V-L-6 1 V-T-2 9 5 PPP-B-6 36 PPP-T-45 Laces, Nylon. Thread, Nylon. Boxes, Shipping, Fiberboard. Tape, Gummed, Paper, Reinforced and Plain
4、, for Sealing and Securing. MILITARY MIL-R-3065 Rubber, Fabricated Products. MIL-C-7350 Cloth, Parachute, Nylon. MIL-B-41826 Batting, Synthetic Fibers: Polyester, (Quilted and Unquilted, Beneficial comments (recommendations, additions, deletions) and any pertinent! data which may be of use in improv
5、ing this document should be addressed to: the Engineering Division, San Antonio ALC/bllfEDO, Kelly AFB, Texas 78241 by using the self addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. “DISTRIBUTION STATEXVENT A. Approved for pu
6、blic release; FSC 8465 distribution is unlimited.d THIS DOCUMENT CONTAINS 30 PAGES Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-43659 MIL-1-45208 k _ - MIL-M-43768A 8i.I 7777906 0377692 5 MIL-M-43968A STANDARDS FEDERAL FED-STD-191 FED-STD-75
7、 1 Stopper, Inflating Tube, Pneumatic Mattress. Inspection Systems Requirements. Textile Test Methods. Stitches, Seams, and Stitchings. MILITARY MIL-STD-105 MIL-STD-129 .MIL- S TD- 14 7 MIL-STD-417 Sampling Procedures and Tables for Inspection by Attributes. Marking for Shipment and Storage. Palleti
8、zed Unit Loads for 40“ X 45“ Pallets. Classification System and Tests for Solid Elasto- meric Materials (Symbols and Tests). DRAWINGS U.S. ARMY NATICK RESEARCH AND DEVELOPMENT COMMAND 2-3-97 2-3-99 Mattress, Pneumatic; Construction Details. Mattress, Pneumatic; Inflating Tube and Stopper. (Figures 1
9、 and 2 are miniature reproductions of the referenced drawings and are attached for information only.) (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 dire
10、cted by the contracting officer. ) 2.2 Other publications. The following documents form a part of this speci- fication to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND
11、MATERIALS ASTM D 903 Peel or Stripping Strength of Adhesive Bonds. * ASTM D 2000 Rubber Products in Automotive Application. (Application for copies should be addressed to the American Socie.ty for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) 2 Provided by IHSNot for ResaleNo rep
12、roduction or networking permitted without license from IHS-,-,-MIL-M-4368A 84 7777706 0377693 i i? MIL-M-43968A NATIONAL MOTOR FREIGHT TRAFFIG ASSOCIATION, INC., AGENT National Motor Freight Classification (Application for copies should be addressed to the American Trucking Asso- ciation, Inc., Traf
13、fic Department, 1616 P Street, N.W., Washington, DC 20036.) UNIFORM CLASSIFICATION COMMITTEE, AGENT Uniform Freight Classification (Application for copies should be addressed to the Uniform Classification committee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606,) 3. Requirements 3.1 Materi
14、al. 3.1.1 Base cloth. The base cloth shall be plain weave, white nylon cloth made from 70 denier (8 tex), multifilament, semi-dull, nylon yarn having sufficient twist or other yarn preparation to allow the cloth to meet both the base cloth and coated cloth.requirements. shall be heat set to prevent
15、distortion, and shall conform to the physical and chemical requirements in table I when tested as specified in 4.3.1, As an al- ternate, nylon parachute cloth conforming to the weight, texture, and breaking strength requirements of type I of MIL-C-7350 may be used providing it meets all the other re
16、quirements cited in table I herein. The cloth shall not be calendered, TABLE I, Base cloth requirements. Minimum Maximum n. n Weight, ounces per square yard Yarns per inch: - Warp - Filling - Warp - Filling - Warp - Filling - Warp - Filling Breaking strength, pounds: Tearing strength, pounds: Shrink
17、age, percent: Chloroform-soluble material, percent PH viue Copper content, percent Manganese content, percent 2.0 (68 g/m) 106 (42 yards/cm) 92 (36 yarns/cm) 80 (356 N) 60 (267 N) 3.5 (16 N) 3.0 (13 N) - 5.0 - 2.3 (78 g/mL 2.0 1.5 1 .o 8.5 O .O03 0.0015 3 Provided by IHSNot for ResaleNo reproduction
18、 or networking permitted without license from IHS-,-,-flIL-fl-439bA 4 Ba 7999906 0377b74 9 I! MIL-M-43968A 3.1.2 Coating compound. The compound used for coating the cloth shall be a heat-vulcanizable chloroprene synthetic rubber containing not less than 60 percent chloroprene by volume. The remainde
19、r of the compound shall consist of softeners curing agents antioxidants pigments and reinforcing materials. 3.1.3 Coated cloth, 3.1.3.1 Top and bottom panels. The coating compound specified in 3.1.2 shall be applied to both sides of the base cloth in a quantity to meet the overa side side is to t 11
20、 weight requirements in table II and shall be distributed so that one shall have 1 1/2 2 1/4 ouncespersquare yard (51 + 9 g/m2) and the other shall have the remainder. The coating on the heavily coated side, which be on the inside of the mattress shall be colored black throughout and I the surface c
21、olor of the lightly coated side shall approximate Olive Green 207 (see 6.3). defects which may affect serviceability. a dull finish produced by an inert mineral dusting powder. ized coated cloth shall conform to the requirements in table II when tested as specified in 4.3.1. The coating shall be pro
22、perly vulcanized and shall be free from The olive green surface shall have The fully vulcan- TABLE II. Properties of vulcanized coated cloth. Characterist ic Requirement Minimum Maximum Overall weight, ounces per square yard Breaking strength, pounds: - Warp - Filling Tearing strength, grams: - Warp
23、 - Filling Hydrostatic resistance: - initial - After accelerated aging - After weatherometer - After strength of coating Adhesion, coating to cloth, pounds per 2 inch width - Heavily coated side - Lightly coated side 8.0 80 65 640 512 i/ i/ i/ u - 6.0 6.0 n (271 g/mL) 12.0 (356 N) - (289 N) - (6 N)
24、(5 N) (27 N/51 mm) - (27 N/51 nun) - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-43968A 44 IM 999990b 0397695 O MIL-M-43 9 6 8A TABLE II. Properties of vulcanized coated cloth - Continued. Characterist ic Stiffness at 70F (2loC), warp, mm S
25、tiffness at -40F (-40C), warp, mm Abrasion (olive green side only), 20 cycles Blocking, 220F (104OC), 30 minutes, scale rating Resistance to cold crack at -50F (-46OC) Resistance to accelerated a i inimum Maximum 80 120 - No. 1 i/ There shall be no leakage. - - 21 Visible loose fibers of the base cl
26、oth shall not be exposed in the center 1 inch (25 mm) on the abraded portion. regarded as fibers from the yarns used to weave the base cloth and not as entire yarns or yarn plies. Visible loose fibers shall be - 31 There shall be no cracking, flaking, or peeling of the coating. - 41 Specimen shall n
27、ot become stiff and brittle, nor soft and tacky, when compared to an unexposed specimen of the same sample unit. 3.1.3.2 Beam material. Coated cloth for beams may be that specified in 3.1.3.1 or may be the same base cloth coated on one side with black coating compound specified in 3.1.2. The single
28、coated cloth shall be properly vulcanized, shall have an overall weight between 6.5 and 8.5 ounces per square yard (220 and 290 g/m2) and shall conform to the requirements for adhesion of coating to cloth as specified in table II, The beam material shall be tested as specified in 4.3.1. 3.1.3.3 Hing
29、e material. Coated cloth for hinges used for reinforcing the fin edge of mattresses having the I-beam construction shall be the base cloth specified in 3.1.1, coated on one side with not less than 2.0 ounces per square yard (68 g/m2) of the coating compound specified in 3.1.2. A light coating of a s
30、uitable rubber compound may be applied to the reverse side of the cloth, if desired, as a matter of convenience in assembly of the mattress. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-439bA 4 I 9999906 0397696 2 MIL-M-43968A 3.1.4 Ceme
31、nt. The compound use for cementing shall be synthetic or natural rubber cement, completely compatible with the coating on the cloth and shall have all other characteristics equal to the requirements for the coatings. The cement shall be such that the cementing of the batting meets the requirements i
32、n 3.3.3, the mattress meets the inflation test requirements in 3.4, and the beams and seams meet the adhesion requirements in 3.9. e 3.1.4.1 Cement for bonding inflating tube. The cement shall be a natural or synthetic rubber cement, similar in composition to the coating compound and when tested as
33、specified in 4.3.1 shall have a minimum peel strength of 4.0 pounds per inch of width (70 N/mm of width). 9 3.1.5 Thread. The thread shall be nylon thread, type I or II, class 1 or 2, size By natural col-or or type III, size By natural color conforming to V-T-295. * 3.1.6 Inflating tube and stopper.
34、 The inflating tube shall be made of black rubber material meeting the requirements of type, class, grade AA615 or BC615 of MIL-R-3065 and ASTM D-2000. The tube shall be of the size and design shown in drawing 2-3-99. The stopper shall conform to MIL-S-43659. 3.1.7 Braid, nylon. The round braid shal
35、l conform to type II, class 1 of V-L-61 except that the ends shall have a plastic tip 1/2 inch (13 mm) in length (minimum) to prevent raveling. (305 - + 13 mm) long and shall be dyed black. The braid shall be 12 - + 1/2 inches 3.1.8 Batting, polyester. The polyester batting shall conform to the requ
36、irements for type III of MIL-B-41826 except the batting shall weigh not less than 5.0 (170 g/m2) nor more than 5.5 ounces per square yard (186 g/m2) and shall have a minimum thickness of 0.730 inches (18.5 mm). All launder- ability requirements shall not be applicable. 3.2 Design. The mattress shall
37、 conform in all respects to the design and dimensions shown on drawing 2-3-97 except that the.insulating batting shall be included. Dimensions shall be measured in uninflated condition with tolerances of plus or minus 1/4 inch (6 mm) except where other tolerances are specified. upper or head end of
38、the mattress in the air channel shown on drawing 2-3-97. The center of the inflating tube shall be located 4 + 1 inch (102 + 25 mm) from the head edge of the mattress. The inflating tbe shall not 6e cemented over any beam flange. The inflating tube shall be attached to the top panel at the 3.3 Const
39、ruction. a. The mattress shall be constructed with one piece top and bottom panels of the coated cloth specified in 3.1.3.1, assembled with the heavily coated side of the cloth on the inside of the air chamber. b. A piece of batting specified in 3.1.8, 3-1/4 + 1/4 inches (83 + 6 mm) wide by 62 + 1 i
40、nches long (1575 + 25 mm) shall be incorporated into each of the-four center channels zn. such a manner asu to finish 6 - + 1 inch (152 - + 25 mm) from each ,end of the mattress. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-C. d. e. f. g. h. MIL
41、-M-43968A A piece of batting specified in 3.1.8, 5-3/4 + 1/4 inches (146 2 6 mm) wide by 62 + 1 inches long (1575 + 25 and the mating surface of the coated fabric shall .-_ - be cleaned to remove dusting powder and dirt. -. - The inflating tube shall be securely fastened by full cementing and vulcan
42、izing by means of a press to the underside of the top mattress panel of the upper or head end of the mattress. The bottom mattress panel shall be protected by a circular adhered chafing patch made of either of the coated fabrics specified in 3.1,3.1 or 3.1.2.1 not less than 3 inches (76 mm) in diame
43、ter firmly affixed to the inside bottom mattress panel opposite the tube protrusion. shall be clean and free from flash. The inflating tube The braid for securing the inflating tube stopper shall be inserted through the holes of the tube stem and stopper, each end looped around the hole and securely
44、 tied. The braid shall be 12 + 1/2 inches (305 + 13 mm) in length and when attached to the stopper, the stopper shall hang not less than 4 (102 mm) not more than 5 inches (127 mm) from the inflating tube hole. Either I-beam (class 1) or C-beam (class-2) construction of the mattress may be employed.
45、3.3.1 I-beam construction (class i). The fin edge and I-beam seams shall be cemented full width and rolled to secure good adhesion, The I-beams shall be constructed from two strips of either of the coated specified in 3.1.3-1 or 3.1.3.2, not less than 2 1/2 inches (64 mm) wide, secured to each other
46、 by stitching or cementing. each ply shall adhere one to the other. shall be not less than 1 1/8 inches (29 mm). If plies are joined by two rows of stitching, seam type SSa-2 with six to eight stitches per inch (2.4 to 3.1 stitches/cm) and stitch type 401 and 301 conforming to FED-STD-751 shall be u
47、sed. The rows of stitching shall be at least 5/8 inches (16 mm) from the edges of the strip to permit attaching a flange to the body material having arms at least 5/8 inch (16 mm) on both sides. The beginnings and ends of all stitching shall be backstitched or tacked for at least 1/2 inch (13 mm). A
48、ll breaks in stitching shall be overstitched for at least 1 inch (25 mm). The distance between rows of stitching shall be not less than 1 i/8 inches (29 mm). If plies are joined by cementing, they shall be full-cemented not less than If cemented, the heavily coated sides of the cloth in The effectiv
49、e height of the partition 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-1 1/8 inches (29 mm) wide along the center-line of the strips, leaving at least 5/8 inch (16 mm) along each edge for forming the flange top and bottom. The line of attachment of the arms to top and bottom panels shall be not less than 1/2 inch (13 mm) in width. cemented to the body of the mattre
