1、F MIL-F-3334B 53 777770b 0330238 7 -. I Beneficial comments (recomnendations, additions, deletions) and any per- tinent data which may be of use in improving this document should be addressed to: Engineering Specifications and Standards Department (Code 93), Naval Air Engineering Center, Lakehurst,
2、NJ 08733, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or bv letter. t Sheet Strip As ordered (shapes) MIL-F-81334BIAS) 5 July 1977 Superseding 1 May 1969 MIL-F-81334A(AS) MILITARY SPECIFICATION FOAM, PLASTIC, FLEXIBLE
3、, OPEN CELL POLYESTER TYPE, POLYURETHANE This specification is approved for use by the Naval Air Systems Comnand, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specif;cation covers flexible, open cell , poly- e
4、ster type, polyurethane foam. (See 6.1) 1.2 Classification. 1.2.1 Grade. The materials furnished shall be of the following grades : Grade I Grade II Four pounds per cubic foot density Six pounds per cubic foot density 1.2.2 Form. The material shall be furnished in the following f omis : 2. APPLICABL
5、E DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. ,- FSC 5340 I M Licensed by Information Handling Services, MIL-F-81334B 53 I 7999906 0438853 O
6、 E NIL-F-13348 (AS) SPECIFICATIONS FEDEBIL I Adhesk Rubbr ,;General Purpose . BOX, I Wood, Cleated, Plywood . :,w. BOX, Shipping, F;,!.- ,. , - . . MIL!TARY - . Y . -. MI L-P-116 Preservation; beihods of MI L-H-5506 MIL-L-23699 Hydraul ic Fl uid, Petrol em Base , Ai rcraft , Mi.ssi i e and Ordnmce L
7、ubri cati ng Oi 1 , Aircraft Turbi ne Engines , Synthetic Base MIL-M-81288 Eounti ng Bases , Fl exi bl e Pl asti c Foam STANDARDS MILITARY . MI L-STD-i o5 Sampling Procedures and Tables for inspection by Attributes MI L-STD-129 - Markins for Shipment 2nd Storaoe (Copies of specificotions, standards,
8、 drzwings, and publications re- quired by antractors in connection with specific procureRent functions should De obtained from the procaring activity or as directed by the contracti ng offi Cer. ) 2.2 Other Publications - The following documents form a part Of this specification to the extent specif
9、ied herein. indicated, the issue in effect on date of invitation for bids shall WER1CAt-I SOCIETY FOI? TESTING AND PATERIALS (ASTM) Unless otherwise apply. ASTM D 412-75 ASTM O 1564-71 Tests for Rubber Properties in Tevsion - Testing Flexible Cellular Materials - Slab Urethane Foen 2 Licensed by Inf
10、ormation Handling ServicesMIL-F-8133B 53 W 777770b Oll0240 5 W ASTM D 1692-74 Test for Rate of Burning or Extent of Burning of Ce1 1 u1 ar P1 astics Using a Supported Specimen by a Horizontal Screen ASTM F 74-73 Determi ni ng Hydro1 yti c Stabi 1 i ty of P1 asti c Encapsul ants for Electronic Device
11、s (Application for copies should be addressed to the American Society For Testing and Materials, 1916 Race Street, Philadelphia, PA 19105.) UNI FORM CLASS IF I CATI ON COMMITTEE Uni form Frei ght C1 assi fi cati on Ru1 es (Application for copies should be addressed to the Uniform Classification Comm
12、ittee, Room 1106, 222 South Riverside Plaza, Chicago, IL 60606.) (Technical society and technical association specifications and standards are generally available for reference from libraries. distributed among technical groups and using Federal Agencies. ) 3. REQUIREMENTS They are also 3.1 First ar
13、ticle. Unless otherwise specified, the polyurethane foam furnished under this specification shall be a product which has passed the first article inspection specified herein. 3.2 Material. The flexible, open cell polyester polyurethane foam shall be formed by the addition polymerization of diisocyan
14、ate and polyhydroxy compounds. Polyesters shall be used as hydroxyl terminating groups. The finished material shall consist of a network of predominantly open and.interconnecting cells of uniform size and character. 3.2.1 Color - Unless otherwise specified (see 6.2), the color 3.2.2 Finish - Unless
15、otherwise specified (see 6.2), all surfaces shall be as sied. s ha 1 1 be cut- f i ni s hed. 3.2.3 Form - The material furnished under this specification shall be in the foGf sheets, strips, or as ordered (see 6.2). 3.3 Toxic-ity. The material shall have no adverse effect on the health of personnel
16、when used for its intended purpose. pertinent to this effect shall be referred by the procuring activity to the appropriate departmental medical service who will act as an advisor to the procuring activity. Questions 3 Licensed by Information Handling ServicesMIL-F-81334B 53 9999906 OLLO2YL 7 W MIL-
17、F-81334B(AS) 4 - t 0.3 30 450 4.5 3.4 Pro erties. The finished foam properties shall be as speci- fied irs Ta + e I. 6 - t 0.3 25 400 4.0 TABLE I. PHYSICAL PROPERTIES PROPERTY knsi ty, pounds/cubic feet Tensile strength, psi, min Elongation, %, - + 100 Tear resistance, pounds, min Pore openings, por
18、es/l inear inch Flame resistance Compression set, X, max Resilience, % recovery of original thickness Properties after high temperature ex- posure, max % change from original values Compression set Tensile strength El ongation Die cut resistance, % recovery of initial thickness Steam autoclave, prop
19、erties after, max % change from orig. value Compression set Tensi 1 e strength Fluid resistance, properties after, max % change from orig. values Tensi le strength El onga t i on REQUIREMENT .GRADE 1 1 GRADE 2 ALL GRADES 60 - t 10 Self extinguishing within 10 sec. No burning on foil 10 95 25 25 25 9
20、5 - No fusion of pores 10 10 TEST PARA. 4.6.2 4.6.3 4.6.3 4.6.4 4.6.5 4.6.6 4.6.7 4.6.8 4.6.9 4.6.10 4.6.11 4.6.12 4 Licensed by Information Handling Services- MIL-F-L334B 53 9999906 OLL0242 7 _. - TABLE I (Continued) PROPERTY Load def 1 ec ti on Low temperature vi bration Hydrolytic stability, extr
21、a- polated lifetime at 23OC (73.4OF), minimum REQUIREMENT ALL GRADES All portions of curve within 15% of nominal Curve of Figure 1 No tearing. Transmi ssabi 1 i ty shall not exceed that of Figure 2 7 years TEST PARA. 4.6.13 4.6.14 4.6.15 3.5 Age restrictions. The flexible polyurethane foam shall not
22、 be older than 6 months from the date of manufacture when shipped for delivery to the Government. 3.6 Workmanship. The flexible polyurethane foam shall be a product manufactured by such processes as to meet all the requirements of this specification. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibilit
23、y for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified herein. fied in the contract, the contractor may use his own or any other facili- ties suitable for the performance of the inspection requiremen
24、ts speci- f ied herein un1 ess di sapproved by the Government. the right to perform any of the inspections set forth in the specifica- tion where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise speci- The Government reserv
25、es 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: 1. 2. First article inspection (see 4.3) Quality conformance inspection (see 4.4) 5 Licensed by Information Handling ServicesMIL-F-L334B 53 = 9999906 OLL0243 O MI L-F-81334B (AS) 4.3 First a
26、rticle inspection. When specified (see 4.3.1 and 6.2), first article inspection shall consist of all the tests, examinations and inspections of this specification. approving the first article shall be as specified in 6. Instructions as to testing and 4.3.1 Prior approval. First article inspection or
27、 any part thereof, may be waived, at the discretion of the procuring activity when it has been determined that the polyurethane foam is from a previously approved batch. 4.3.2 Product changes Changes in formulation, composition or production techniques shall be cuase to reinspect the polyurethane fo
28、am product to all the requirements of this specification. 4.3.3 First article sample. First article sample shall consist of 3 sheets of foam 1 foot by 2 foot by 1 inch thick. have been produced in the same facility intended for the contract production run. ?he sample shall The first article sample s
29、hall be identified bv labels or tags attached in a manner which will not affect the sampl. shall contain the following information: The labe MI L-F-81334B Sample for first article inspection Foam, Plastic, Flexible, Open Cell, Polyester Type, Po Mame of manufacturer Name of distributor (when applica
30、ble) Manufacturers product designation Date of manufacture or tag yurethane 4.3.4 Manufacturers data The manufacturer shall submit test reports which show the product furnished complies with all the require- ments contained herein. 4.4 Quality conformance. 4.4.1 Lot formation. Unless otherwise speci
31、fied, a lot shall consist of all the polyurethane foam produced under essentially the same manufacturing conditions, at one plant designated a batch, and offered for inspection at one time. shall be expressed as the total number of yards supplied. Unless otherwise specified, the lot size 4.4.2 Sampl
32、ing. 4.4.2.1 Visual. Sample size shall be determined in accordance with Inspection Level II of MIL-STD-105. The unit of product shall be two sauare feet. The samples shall be randomly selected from the mater- ial supplied. Inspection shall be as speci 4.4.2.2 Physical properties. A quant Derform tes
33、ts Specified in 4.4.3.2 shall be lot submitted for inspection. 6 ied in 4.4.3.1. ty of foam suffic randomly selected ent to from each a Licensed by Information Handling ServicesMIL-F-L334B 53 7777706 OLLO24Li 2 Exami nation Defect Appearance Sample gouged, torn, or otherwise ,damaged to prevent acce
34、ptance. l Finish Not as specified 4.4.2.3 Packaging. A quantity of shipping containers fully packed, just prior to closure, shall be randomly selected from each lot in accordance with Inspection Level II of MIL-STD-105. duct shall be one shipping container and the lot size shall be the number of shi
35、pping containers. Inspection shall be as specified in 4.4.3.3. The unit of pro- i Marking 4.4.3 Inspections. 4.4.3.1 Visual. Units of product selected in 4.4.2.1 shall be examined for defectc as specified in Table II. Level (AQL) for this inspection shall be 1.0 defects per 100 units. The Acceptable
36、 Quality Not as specified Property Requirement No. of test specimens Density Table I 2 Pore openings Table I 5 Load deflection Table I 3 Compression set Table I 3 4.4.3.2 Physical properties. Samples selected in 4.4.2.2 shall be examined to the properties in Table III. Failure of any test specimen t
37、o meet the requirements specified herein shall be cause to reject the lot represented by the specimen. TABLE III. PHYSICAL PROPERTY INSPECTION Results reported as pass or fail pass or fail pass or fail Average lJ 7 Licensed by Information Handling ServicesMIL-F-L334B 53 7377706 0330245 4 MIL-F-81334
38、B(AS) TABLE IV. PACKAGING EXAMINATION Packing (all forms) Mot level specified; not in accordance with contract requirements Container not as specified; closures not accomplished by specified or required methods or materials Any nonconforming component; component missing, damaged, or otherwise defect
39、ive affecting serviceability Inadequate application of components, such as : indomplete closures of case 1 iners, conta i ner f 1 aps , 1 oose ends 4.5 Standard conditions. Unless otherwise specified, all test samples shall be conditioned at 23 2 1.l0C (73.5 - + 2oF) and 50 - + 4 per- cent relative
40、humidity prior to testing. 4.6 Test methods. 4.6.1 4.6.2 Density. The density shall be determined in accordance with Appearance. The color, finish, and form of the foam shall be visually examined to the requirements of 3.2 and related subparagraphs. ASTM D 1564-71 using a 0.5 cubic foot specimen. 4.
41、6.3 Tensile strength and elongation. Tensile strength and elongation determinations shall be made in accordance with ASTM D 1564-71. 4.6.4 Tear resistance. The material shall be tested in accordance with ASTM Method 1564-71. 4.6.5 Pore openings. The number of pore openings shall be visually determin
42、ed at 10 power magnification. imposed grid may be used to facilitate the measurement of the number of openings . determined in accordance with ASTM D 1692-74. instant of flame removal. Photographs taken with a super- 4.6.6 Flame resistdnce. Flamnability characteristics shall be Time shall be counted
43、 at 8 P . G- Licensed by Information Handling ServicesNIL-F-L33LIB 53 777770b OLL0246 b 9 4.6.7 Compression set. The compression set of the polyurethane foam shall be determined in accordance with ASTM D 1564-71. shall be deflected 50 percent. pression) of the foam shall be determined as specified i
44、n Suffix D of ASTM D 1564 except that the compression shall be maintained only one (1 ) minute at standard conditions. upon removal from the compression apparatus. thickness shall be in accordance with the requirement in Table I. Specimens 4.6.8 Resilience. The resilience (immediate recovery after c
45、om- The specimen shall be re-measured immediately Percent recovery of original 4.6.9 High temperature resistance. Tensile strength and .compression set specimens shall be prepared and exposed in an air circulating oven at 140 + 1OC (284 + 2OF) for 22 hours. standard conditions, then tested for tensi
46、le strength, elongation and Compression set as specified in 4.6.3 and 4.6.7 respectively. Percent change from original values shall be reported. The specimens shall be cooled to 4.6.10 Die cut resistance. Three speciment shall be die-cut at ambient conditions as specified in ASTM D 412 using die “C“
47、. Each specimen shall be measured to determine percent recovery of original thickness and then visually examined for evidence of fusion. shall be placed in an autoclave and exposed as follows: 4.6.11 Steam autoclave. Three compression set specimens (4.6.7) Grade I specimens - 15 pounds per square in
48、ch for 2 hours Grade II specimens - 15 pounds per square inch for 3 hours Test specimens shall be removed from the autoclave and dried in a circulating air oven at 70 + l0C (158 + 2OF) for 1 hour, then conditioned at standard conditions (4.57 for 24 hours before testing for compression set as specif
49、ied in 4.6.7. chal 1 be reported. Percent change from original compression set values streng th 4.6 inch all shall be to that 4.6.12 Fluid resistance. Three tensile strength specimens shall be completely immersed in hydraulic fluid conforming to MIL-H-5606 and three specimens in lubricating fluid conforming to MIL-L-23699. time at standard conditions shall be one (1) hour +5,-O minutes. The specimens shall be removed from the fluid, the excess fluid removed and tested as specified in 4.6.3. Percent change from original tensile Inanersion and elongation values sha
