1、 INCH-POUND MIL-PRF-20092M 27 September 2004 SUPERSEDING MIL-PRF-20092L 27 October 1986 PERFORMANCE SPECIFICATION RUBBER OR PLASTIC SHEETS AND ASSEMBLED AND MOLDED SHAPES, SYNTHETIC, FOAM OR SPONGE, OPEN CELL This specification is approved for use by all Departments and Agencies of the Department of
2、 Defense. 1. SCOPE 1.1 Scope. This specification covers inherently combustion retardant flexible foam or sponge materials with low emission of smoke and toxic products to be used for mattresses, cushioning, and packaging applications. 1.2 Classification. Cellular synthetic rubber or plastic will be
3、of the following type, class, and conditions, as specified (see 3.6.1, 3.6.2.1, and 6.2): Type II - Uncored. Class 5 - Fire retardant, low smoke (for shipboard use). Condition A - Medium. Condition B - Medium firm. Condition C - Firm. Condition D - Soft. Comments, suggestions, or questions on this d
4、ocument should be addressed to Commander, Naval Sea Systems Command, ATTN: SEA 05Q, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to commandstandardsnavsea.navy.mil, with the subject line “Document Comment“. Since contact information can change, you may want to
5、 verify the currency of this address information using the ASSIST Online database at www.dodssp.daps.mil AMSC N/A FSC 9320 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-20092M 22. APPLICABLE DOCUMENTS 2.1 General. The documents listed in th
6、is section are specified in sections 3, 4, or 5 of this specification. This 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 us
7、ers are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards and handbooks. The following specifications, standards, and handbooks form a par
8、t of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-293 - Visual Inspection Guide for Cellular Rubber Items. (Copies of these documents are available onli
9、ne at http:/assist.daps.dla.mil/quicksearch or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and pub
10、lications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. BUREAU OF MEDICINE AND SURGERY (BUMED) BUMED INST 6270.8 - Procedures for Obtaining Health Hazard Assessments Pertaining t
11、o Operational Use of a Hazardous Material. (Copies of this document are available online at https:/bumed.med.navy.mil or from Bureau of Medicine and Surgery, Department of the Navy, 2300 E Street, NW, Washington, DC 20372-5300.) NAVAL SEA SYSTEMS COMMAND (NAVSEA) S9510-AB-ATM-010 Rev 2 of 30 July 19
12、92 - Nuclear Powered Submarine Atmosphere Control Manual. (Copies of this document are available from the Naval Sea Systems Command, Code SEA 05Z9, 1333 Isaac Hull Avenue, SE, Stop 5133, Washington Navy Yard DC 20376-5133.) 2.3 Non-Government publications. The following documents form a part of this
13、 document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ASQC Z1.4 - Sampling Procedures and Tables for Inspection by Attributes. (DoD adopted) Provided by IHSNot for Resale
14、No reproduction or networking permitted without license from IHS-,-,-MIL-PRF-20092M 3(Copies of this document are available from www.asq.org or American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) ASTM INTERNATIONAL ASTM C 739 - Standard Test Method for Cellularosic Fiber
15、 (Wood-Base) Loose-Fill Thermal Insulation. (DoD adopted) ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Rubbers and Thermoplastic Elastomers Tension. (DoD adopted) ASTM D 573 - Standard Test Method for Rubber-Deterioration in an Air Oven. (DoD adopted) ASTM D 945 - Stand
16、ard Test Methods for Rubber Properties in Compression or Shear (Mechanical Oscillograph). (DoD adopted) ASTM D 1055 - Standard Specifications for Flexible Cellular Materials - Latex Foam. (DoD adopted) ASTM D 3574 - Standard Methods for Flexible Cellular Materials - Slab, Bonded, and Molded Urethane
17、 Foams. (DoD adopted) (Copies of these documents are available from www.astm.org or ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA, 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this d
18、ocument takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. 3.2 Mate
19、rial. The base material shall be a synthetic rubber or plastic cellular compound processed to meet all of the requirements of this specification. The use of reclaimed or natural rubber is prohibited. 3.3 Construction. 3.3.1 Form. The material shall have a polymerized or vulcanized homogeneous (free
20、from foreign material) cellular structure with a porous surface and open cells. The cells shall be interconnecting and uniform in size. The form of the material shall be in sheets or in assembled or molded shapes, as specified (see 6.2). Solid fillers, flame retardant chemicals, and other additives
21、used to achieve appropriate performance standards as specified in this specification shall not be deemed “foreign” material within the meaning of this section. 3.3.2 Finish. When a finish, such as a cloth scrim, is required to improve the strength, tear resistance, and so forth on the finished shape
22、, it shall be as specified (see 6.2). 3.3.3 Manufacturing requirements. Cellular material for mattresses and cushions may be molded in one piece or may be assembled by laminating to achieve thickness, and by butting to achieve width or length. Assembled items shall be cemented together. Incidental d
23、efects in the cellular material which occur in standard manufacturing practices and assembly will be allowed if they are corrected as indicated and the resulting product conforms to this specification. (a) Tears occurring during removal from mold shall be cemented together. Provided by IHSNot for Re
24、saleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-20092M 4(b) Changes in volume during cure, resulting in surface depressions or minor changes in size, shall be corrected by addition of material of identical composition and buffed to a level surface. (c) Laminae produc
25、ts shall be scrim-reinforced provided such scrim reinforcing does not add to flammability or smoke emission of the material. Also, scrim reinforcing will be permitted as long as the surfaces of the mattress are not wrinkled. Scrim reinforcing is defined as woven cloth fabric bonded to the cellular s
26、urfaces to add to the tensile strength of the assembly. (d) Where laminae assembly is employed to achieve thickness, the laminae shall be as thick as possible but in no case less than 1/2-inch. (e) Seams that are cemented shall not cause distortion of the base material in an uncompressed state or wh
27、en compressed to 75 percent of the original height. Cemented seams shall exhibit strength greater than the base material. (f) For cushions, a maximum of two sections may be butted together to achieve width or length. Sections are defined as pieces of full thickness which are the full width or length
28、 of the item. Lamination may be used to achieve thickness. 3.4 Odor. The material shall be properly cured in order to prevent any objectionable odor. (An objectionable odor shall be defined as one that is atypical of cellular rubber compound.) The material shall conform to the requirements of paragr
29、aph 5.6 of ASTM C 739. 3.5 Dimensions and tolerances. Dimensions of all sheets, molded or assembled shapes shall be as specified (see 6.2), and within the tolerances or dimensions of latex foam rubber products for general applications in accordance with ASTM D 1055. 3.6 Physical properties. 3.6.1 In
30、dentation. The indentation of each class and condition of uncored material shall be as specified in Table I or II. TABLE I. Indentation and apparent density of mattress insert material (Type II mattress inserts only). Class Condition Indentation, pounds required to compress 50 square inches (in2) of
31、 a 43-inch specimen 25 percent Apparent density, pounds per cubic foot (lb/ft3) (maximum) based on gross volume Class 5 Medium Medium firm Firm 25 to 42 30 to 55 42 to 60 8.0 9.0 9.2 3.6.2 Density. 3.6.2.1 Type II. The maximum apparent density of each class and condition of uncored material shall be
32、 as specified in Table I or II. TABLE II. Indentation and density of cushioning material (Type II nonmattress inserts). Class Condition Indentation, pounds required to compress 50 in2 of a 43-inch specimen 25 percent - test method ASTM D 3574 Apparent density, (lb/ft3) (maximum) based on gross volum
33、e Compression resistance Oscillograph lb/in2 to compress to 25 percent Class 5 Soft 10 to 25 7.5 0.20 to 0.50 Medium 25 to 42 8.0 over 0.50 to 0.84 Medium firm 30 to 55 9.0 0.60 to 1.10 Firm 42 to 60 9.2 over 0.84 to 1.70 Provided by IHSNot for ResaleNo reproduction or networking permitted without l
34、icense from IHS-,-,-MIL-PRF-20092M 53.6.3 Compression resistance (for Type II, other than mattress inserts). Compression resistance of each condition of cellular material shall be as specified in Table II. 3.6.4 Low temperature compression resistance (Type II mattress inserts only). Compression resi
35、stance of Type II material shall not change more than 70 percent from the initial values when tested at low temperature. 3.6.5 Compression set. Compression set of the cellular material shall be not greater than 10 percent for class 5 material. 3.6.6 Flexing. Cellular material shall withstand flexing
36、, without physical breakdown of cellular structure. After the flexing test, the set remaining after 1 hour at rest shall be not greater than 10 percent. 3.6.7 Accelerated aging. 3.6.7.1 Air-oven aging. After air-oven aging , the change in indentation or compression, as applicable, of the cellular ma
37、terial shall be not greater than 20 percent from the values obtained before aging. 3.6.7.2 Air-pressure heat aging. Cellular material shall withstand the air-pressure heat aging test for 2 hours without changing shape, hardening, softening, or becoming tacky. 3.6.8 Fire performance. 3.6.8.1 Burning
38、characteristics. The cellular material shall have a maximum net peak heat release rate not greater than 150 kilowatts (kW). Burning droplets shall not be formed and drop to the floor or the top of the weighing platform. 3.6.8.2 Smoke generation. The cellular material shall have an average specific e
39、xtinction area not greater than 300 square meters per kilogram (m2/kg). 3.6.9 Bend fatigue resistance (mattress inserts only). The cellular material shall not crack before or after aging. 3.6.10 Tensile strength and ultimate elongation. Tensile strength of the material shall be not less than 9 lb/in
40、2. Ultimate elongation shall be not less than 100 percent for class 5 material. 3.6.11 Cemented seam strength. Cemented seams shall be stronger than the base material, both initially and after oven aging. 3.6.12 Steam autoclave effect. The material shall be exposed in a steam autoclave. Exposed mate
41、rial shall conform to the following requirements: (a) Compression force deflection change - 25 percent, maximum. (b) Constant deflection compression set - 25 percent, maximum. 3.6.13 Dynamic fatigue. Material thickness shall not decrease by more than 10 percent maximum. 3.7 Identification. Each shee
42、t, molded or assembled shape, shall be marked in a permanent and legible manner with the following information. If the item is too small for marking, the information shall be provided on the wrapping or container of each item (see 6.2). Manufacturer Date of manufacture Contract number and lot (if ap
43、plicable) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-20092M 6Specification number Type Class Condition 3.8 Workmanship. Material shall be of uniform texture, be free of obvious manufacturing imperfections which may impair serviceability,
44、 and meet the requirements of this specification. 3.9 Off-gassing. The material shall meet the requirements in the Nuclear Powered Submarine Atmosphere Control Manual, S9510-AB-ATM-010 Rev 2 of 30 July 1992, for a usage category of Limited (see 4.6 and 6.5). 3.10 Toxicity. The material shall have no
45、 adverse effect on the health of personnel when used for its intended purpose. The material shall be assessed by the Navy Environmental Health Center (NAVENVIRHLTHCEN) using the administrative Health Hazard Assessment (HHA). A flowchart for this process can be found as enclosure (1) of BUMEDINST 627
46、0.8. The HHA is a review of the material based on information submitted by the manufacturer, to assess health hazards associated with the handling, application, use and removal of the product. The material shall not cause any environmental problems during waste disposal (see 4.7 and 6.6). 4. VERIFIC
47、ATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) First article inspection (see 4.2). (b) Conformance inspection (see 4.3). 4.2 First article inspection. First article inspection shall consist of the examinations and tests specified
48、in Table III, 4.4.1, 4.5.8, 4.5.9, 4.6, and 4.7. 4.2.1 Sampling for first article inspection. Sufficient first article samples shall be taken from the first production lot and tested as specified in 4.2. 4.3 Conformance inspection. Conformance inspection shall consist of the examinations and tests s
49、pecified in 4.4 through 4.7, as applicable. 4.3.1 Sampling for conformance inspection. 4.3.2 Lot. A lot shall consist of all material of the same type, class, and condition produced in one plant under the same conditions, and offered for delivery at one time. 4.3.3 Sampling for examination. Sample sheets or molded or assembled shapes shall be taken from each lot in accordance with ASQC Z1.4 at inspection level II. Major and minor defect
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