1、ZZ-R-7LOA 53 W 7777774 00065$!b 2 6- E- S - /J I RUBBER GASKET MATERIAL, 35 DUROMETER HARDNESS 1. SCOPE 1.1 This specification covers vulcanized rubber gasket material of 35 durometer hardness for use in airports, airtight and watertight doors, and hatches (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 The
2、following specifications and standards, of the issues in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. UU-P-268-Paper, Krafi, Untreated, Wrapping. PPP-BT566-Boxes, Folding, Paperboard. PPP-B-636-Box, Fiberboard. PPP-B
3、-640-Boxes, Fiberboard, Corrugated, Triple-Wall. PPP-B-665-Boxes; Paperboard, Metal Stayed (Including Stay Material). PPP-B-676-Boxes, Setup. PPP-B-1055-Barrier Material Waterproofed, Flexible. PPP-D-723-Drums, Fiber. PPP-T-45-Tape, Gummed, Paper, Reinforced and Plain, for Sealing and Securing. PPP-
4、T-76-Tape, Pressure-Sensitive Adhesive Paper, (For Carton Sealing). Fed. Std. No. 123-Marking for Domestic Shipment (Civilian Agencies), Fed. Test Method Std. No. 601-Rubber: Sampling and Testing. I I the SuDerintendent cf Documents, US. Government Printing Office, Washington, D.C. 20402. (Federal G
5、overnment activities may obtain copies of Federal Specifications, Standards, and Handbooks and the Index of Federal Specifications and Standards from established distribution points in their agencies.) I Military Specification : I MTI-P-116-Preservation, Methods of. MIL-STD- 105-Sampling Procedures
6、and Tables for Inspection by Attributes. MILSTD-129-Marking for Shipment and Storage. MIGSTD-190-Identification Marking for Rubber Products. MIL-STD-289-Visual Inspection Guide for Rubber Sheet Material. MIL-STD-289-Visual Inspection Guide for Rubber Extruded Goods. MIL-STD-407-Visual Inspection Gui
7、de for Rubber Molded Items. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ZZ-R-71On (Copies of Military Specifications and Standards required by contractors in connection with specific procurement functions shoiild be obtained from the procuring
8、activity or as directed by the contracting officer.) U.S. Government Printing Office: 1967 3. RI3QCJIRERIENTS 3.1 Material. The material shall be vulcanized rubber which meets the requirements specified herein. 3.2 Form. The rubber gasket material shall be furnished in the form specified (see 6.2).
9、This form may be sheets, strips of rectangular cross section, shapes cut from sheets, molded shapes or extruded slinpes. 3.2.1 Sheet. Sheet rubber shall have smooth surfaces and shall have the thickness specified (see U.2). Unless otherwise specified (see 6.2), the tolerances in thickness specified
10、in table I shall apply. Shcet rubber shall be furnished in rolls 36 =t= 1 inch wide. 3.2.2 Strip. Strip rubber of rectangular cross section shall have smooth surfaces and shall have tho crocs siial dimensions specified see 6.2). Unless otherwise specified (see 6.2), the tolerances in thickness and w
11、idth specified in table I shall apply. TABLE I. Tolerances in width and thickness I- Wid th, inch Las than HG Over to %, incl. Over % to Ml incl. Over to 1, incl. Over 1 to 2, incl. Over 2 - Width tolerance (=t) Thickness, inch 0,010 inch 0.016 inch 0.031 inch 0.011.7 inch 0.062 inch 3 percent x2 to
12、 xi Over J.16 to %, incl. Over W to %, incl. Over % to 1, incl. Over 1 Thickness tolerance (hl 0.008 inch 0.016 inch 0.031 inch 0.047 inch 6 percent 3.2.3 Cut, and extruded shapes. Cut, molded, and extruded shapes shall have the form, dimensions, 3.3 Physical requirements. The rubber gasket material
13、 shall conform to the requirements specified and tolerances specified (see 6.2). in tahle TT. The test procedures are detailed in 4.4,. IARLI5 1 I, Physical requirements of rubber Proper lies _ Tnilial properties: lensile ctrenglh, psi, minimum TI1 tinia to elongation, percen t. I minim um I lardric
14、ss, durometer poin 1s Specific gravily, maximum lensile strength, percent of initial, minimum Compression set, percent, maximum Tensile strength, percent of initial, minimum Ultimate elongation, percent of initial, minimum R-lociulus at SOO percent elongation, percent of initial Properlieu after ove
15、n aging: Properties after light aging: Delamination after immersion: Tensile strength after immersion, percent of initial, minimum Requirement 2000 650 35 f. 5 1.20 80 45 63 80 80 to 120 no delamination 60 Test. procedure 4.4.1 4.4.1 4.4.2 4.48.3 4.4.4 45.4.5 4.4.6 4.4.6 4.4.6 4.47 4.4.8 ,. _ . Prov
16、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ZZ-R-7LOA 53 SB 7797774 0006548 b W ZZ-R-7l0a 3.4 Identification markings. Unless otherwise specified (see 6.2), the vulcanized rubber gasket mate- rial shall be marked in accordance with MIL-STD-190. In ad
17、dition, the identification markings shall indicate the specification number and date of cure (quarter and year). The markings shall be inch high occurring every 6 inches continuously across the sheetand recurring lengthwise every 4 inches on one side only. 3.5 Workmanship. The workmanship shall be s
18、uch as to meet the applicable requirements of this specification. The material shall be free from all foreign matter that may affect the serviceability of the finished product. 4. QUALITY ASSURANCE PROVISIONS 4,.1 Responsibility for inspection. Unless otherwise specified in the contract ar purchase
19、order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the ins
20、pections set forth in the specification where such inspections are deemed necessary to assure that supplies and services con- form to prescribed requirements. 4.2 Sampling. 4,.2.1 Lot. For the purposes of sampling, examination, and tests, a lot shall consist of not more than 2500 poundsf material of
21、 the same form and dimensions, produced in one plant under essentially the same conditions, and offered for delivery at one time. 4.2.2 Sampling for visual and dimensional examination. For the examination specified in 4.3, repre- sentative samples shall be taken at random from each lot in accordance
22、 with table III. TABLH III. Sampling for examination Number of Number Major defects in rolls, I rolls of sheet of rolls strips or gaskets or strips, or number of gaskets in lot 1 to 15 16 to 40 41 to65 66 to I10 I LI Lo 300 30 1 to 800 801 and over or gaskets to be examined all 25 25 35 50 75 I IO A
23、cceptance number 2 Y Rejection number 1 1 1 2 2 3 4 Total defects (major plus minor) in rolls, strips, or gaskets Acceptance Rejection number number 1 2 1 2 1 2 2 3 3 4 4 5 6 7 4,.2.2. t Major defect and minor defect as used in table 111 are defiried as follows: A major defect is a defect that is li
24、kely to resull in failure, or to reduce materially the useability of the unit of product for its intended purpose. A minor defect is a defect that is not likely to reduce materially the useability of the unit of product for its intended purpose, or is a deparLure from established standards having li
25、ttle bearing on the effective use or operation of the unil. 42.3 Sampling for quality conformance and produclion check tesLgiJ/For the tests specified in 4.3.4 and 4.3.5, four samples shall be taken from each lot. Each sample shall consist of a quantity of material sufficient to perform all the test
26、s of 4.3.4 or 4,.3.5, as applicable. The samples shall be taken from those of the rolls or gaskets selected in accordance with 4.2.2 and if possible, no two samples shall be taken from the same roll. If ihe materials supplied are of such size or shape that the necessary test specimens cannot be prep
27、ared from them, the supplier shall furnish four sample pieces 6 inches long by 6 inches wide by 0.080 f 0.010 inch thick and one sample piece at least 6 inches long by 4 inches wide by % inch thick. The sample pieces furnished shall be certified to be identical in cure and composition on the materig
28、l used for the lot submitted. . _II - - -/ * Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ZZ-R-7lOa 43 Examination and tests, 4.3.1 Examination of material. Each of the samples taken in accordance with 4.2.2 shall be subjected to surface examinati
29、on for workmanship, appearance, dimensions and tolerances. The sample unit for examination shall be one sheet, strip, shape, or gasket, as applicable, MIL-STD-289, M1L-STD-298, and MIGSTD-407 shall be used to determine and evaluate visual defects. Defect not covered in these standards is odor. Stron
30、g or objectionable odor is a major defect. Also illegible marking or marking not as required shall be considered a minor defect. Some defects to be looked for in this examination are as follows: cuts, tears, punctures, non-uniform texture, lack of flexibility, rough finish, presence of dirt, foreign
31、 material, and imbedded particles. 4,3.2 Examination of preparation for delivery. An inspection shall be made to determine that the preservation, packaging, packing, and marking comply with the requirements in section 5 of this speci- fication. Defect3 shall be scored in accordance with table IV. Fo
32、r examination of interior packaging the sample unit shall be one shipping container fully prepared for delivery selected at random just prior to tlie closing operations. Sampling shall be in accordance with MIL-STD-105. Defects of closure listed shall be examined on shipping containers fully prepare
33、d for delivery. The lot size shall be the number of shipping containers in the end item inspection lot. The inspection level shall be S-2 with an AQL of 4.0 defects per hundred units. TABLE IV. Examination for defects in preparation for delivery Examine Sackaging Packing Markings Defect Not level sp
34、ecified or required by contract. Sheets, strips or shapes not unit wrapped or otherwise protected. Not levei specified or required by contract. Any component missing, damaged or otherwise defective affecting serviceability. Container not as specified, closures not accomplished by specified or requir
35、ed methods hadequate application of components, such as: incomplete closure of container flaps, Omitted, illegible, incorrect, incompIete, not as specified, not in accordance with con- tract requirements. or materials, loose or inadequate strapping, bulged or distored containers. 4#,3.3 Rejection. I
36、f the number of defects exceeds the applicable acceptance number of table III, this shall be cause for rejection of the entire lot represented by the sample. 43.4 Production check tests. Production check tests shall be conducted on samples from (or repre- senting) tlie first lot of malerial and from
37、 every tenth lot thereafter. All the tests specified in 4.4 shall be conducled. 4.3.5 Quality conformance tests. Quality conformance tests shall be conducled on samples from (or represenling) all lots on which production check tests were not performed. The tests specified in I40.1, 4-.4d2, and 1143
38、shall be conducted. 4*.3.6 Aclion in case of non-conformance. If any of the samples in the production check tests or quality conformance tests is found not to be in conformance with the requirements of this specification, this shall be cause for rejection of the lot which it represents. Furthermore,
39、 production check .tests shall be performed 011 each succeeding lot of the contract or purchase order. This additional testing shall be discontinued, except as specified in %.3.4, after four successive lots have passed the production check lests. 44* Tes1 melliods. 4.4 I Tensile properties. Tensile
40、properties shall be determined in accordance with methods 411 I, 4421, and 4.131, respectively, of Fed. Test Method Std:No. 601. Die III specimens, 0.080 f 0.010 inch hick, shall be used for all determinations of tensile properties, 4 - - - - _ -_ 8 . ; 1, !k $5 . - Provided by IHSNot for ResaleNo r
41、eproduction or networking permitted without license from IHS-,-,- - - . ZZ-R-7LOA 53 m 7777774 0006550 4 m ZZ-R-7l0a 4.42 Hardness. Hardness shall be determined by method 3021 of Fed. Test Method Std. NO. 601 using a Shore A durometer. A 3-second reading shall be taken. The specimens shall be at lea
42、st x inch thick but not more than inch thick. Plied-up specimens may be used. 41.4.3 Specfic gravity. The specific gravity shall be determined by the hydrostatic method 14011 of Fed. Test Method Std. No. 601. 4.4.4# Tensile strength after oven aging. Tensile strength shall be determined, after oven
43、aging in accordance with method 7221 of Fed. Test Method Std. No. 601. The aging period shall be 46 f x hours at 90“ 1“ C. (194“ f 8“ F.). Determination shall be made not less than 20 hours nor more than 48 hours after removal from the oven. 4.4.5 Hot compression set. Hot compression set shall be de
44、termined by method 3311 of Fed. Test Method Std. No. 601, with specimens clamped to 4-0 percent deflection and aged for 46 f hours at 90 f 1“ C. (194“ f 1.8“ F.). 4.4#.6 Tensile properties after light-aging. Specimens shall be light-aged in accordance with method 7311 of Fed. Test Method Std. No. 60
45、1, except that the specimens shall be 0.080 A 0.010 inch thick and the exposure time shall be 50 f hours with four of the Corex D“ filters removed. After light- aging, the tensile properties shall be determined as specified in 4.48.1. 4#.4.7 Delamination. The delamination test shall be conducted in
46、accordance with method 6311 of Fed. Test Method Std. No. 601. 4!.4.8 Tensile strength after immersion. The tensile strength shall be determined after immersion in distilled water in accordance with method 6111 of Fed. Test Method Std. No. 601 except that the im- mersion temperature shall be 100“ f 1
47、.1“ C. (212“ f 2“ F.) and the immersion time shall be 70 f hours. 5. PREPARATION FOR DELIVERY 5.1 Packaging. Packaging shall he level A, B, or C, as specified (see 6.2). 5.1.1 Level A. 5.1.1.1 Sheets. Sheets (see 3.2.1) shall be tightly rolled and securely tied or banded to prevent roll- ing. Each r
48、oll shall be wrapped with not less than two thicknesses of 60-pound minimum weight kraft paper conforming to PPP-B-1055, E-2 secured with 2-inch wide tape conforming to PPP-T-76. 5.1.1.2 Strips. Strips (see 3.2.2) shall be coiled and securely tied to prevent uncoiling, ER gross weight of fiberboard
49、container shall not exceed 20 pounds. 5.1.1.3 Cut, molded and extruded gaskets. Gaskets (see 3.2.3) shall be unit protected in accordance with method III of MIL-P-116 and packaged in containers as specified in 5.1.1.2. 5.1.2 Level B. 5.1.2.1 Sheets. Sheets (see 3.2.1) shall be tightly rolled and securely tied or bonded to prevent un- rolling. Each roll shall be wrapped with not less than two thicknesses of 60-pound minimum weight kraft paper conforming to UU-P-268 and secured wit
