1、MIL-F-51107A 92 W 7779906 0234506 I W MIL-F-5110gA( EA) 20 January 1977 SUPERSEDING MIL-F- 51109 ( MU) 19 April i965 I 4 MILITARY SPECIFICATION FACEBLANK, CHEMICAL-BIOLOGICAL MASK, C12R4 This specification is approved for use by Edgewood Arsenal, Department of the Army, and is available for use by d
2、l Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a chemical-biological mask face- blank molded from a 65 percent natural rubber compound. 1.2 Classification. The faceblank shall be of the following sizes, as specified (see 6.2) : Small Medium 2
3、. APPLICABLF: DOCWNTS 2.1 Government documents. The following documents of the issue in effect on the date of invitation for bids or request for proposal form a part of - this specification to the extent specified herein: SPECIFICATIONS MILITARY MIL-F-51110 - Faceblank - Lens, C14R3. FSC 4240 : Bene
4、ficial comments (recommendations, additions, deletions) and any : : pertinent data which may be of use in improving this document should : : be addressed to: Commander, Edgewood Arsenal, Attn: SAREA-TS-S, : Aberdeen Proving Ground, MD : Standardization Document Improvement Proposal (DD Form 1426) ap
5、pear- : : inP: at the end of this document or by letter. 21010 by using the self-addressed Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-51107A q2 W 7779706 0234507 3 III L- F- 51 1 O /A ( EA) STAXDARDS FIEDERAL FED-STD-123 - Marking for Ship
6、ping ( Civil Agencies ) . MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. DRAW I WGS EDGEWOOD ARSENAL E5-2-875 - Faceblank, Small. E5- 2-80 6 - Faceblank, Medium. Di36-19-14 - Puncture, Tester, Natural Rubber, Q38, Assembly. E136-19-22 - Flexibility, Tester, Natur
7、al Rubber, Q37, Assembly. PUBLICATIONS EDGEWOOD ARSENAL DIRECTIVES No. 618 - Ozone Resistance Test of Natural Rubber Material. (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be ob- tained from the procur
8、ing activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this spec- ification to the extent specified herein. issue in effect on date of invitation for bids or request for proposal shall Unless otherwise- indicated, the apply AIERICAN SO
9、CIETY FOR TESTING AND MATERIALS ASTM Standards : a12 - Method of Tension Testing of Vulcanized Rubber, D572 D573 - Accelerated Aging of Vulcanized Rubber by Oven Method, D624 - Test for Tear Resistance of Vulcanized Rubber, - Accelerated Aging of Vulcanized Rubber by the Oxygen Pressure Methods. 2 P
10、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-SILOSA 42 m SSSSSOb 0234508 5 m D2240 - Indentation Hardness of Rubber and Plastic by Means of a D3182 - Standard Materials, Equipment, and Procedures for Mixing Durometer. Rubber Compounds and for
11、 Preparing Vulcanized Test Sheets. (Applications for copies of the above publications should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadel- phia, Pa.) SCXWARTZ, TULIPAN, AND BIREIINGHAM Occupational Diseases of the Skin (This publication may be obtained f
12、rom the publishers: Lea and Febiger, Philadelphia, Pennsylvania . ) 3.1 Mat erials. 3.1.1 Rubber compound. The rubber compound shall be non-blooming, exceDt for sliRht wax-type bloom, and shall be compounded with no less than-65 percent, by vol Ozone resistance : Flexibility : At 242 3OC. : At -320
13、2 3OC. : Puncture resistance : MPa : 20.7 : % . : 600 : : MPa : 1.72 : : kN/M : : 52.5 : : 39.4 : %: : 44 : : Minutes : 80 : :Grid lines: 7.5: :Grid lines: 4.8: : kPa : 65-5 : : hydrostatic pressure : -. *Individual specimens at 200% elongation shd1 .haye .a minimum tensile stress of 1.65 ma. 750 :
14、3.10 : 20 : 50 : 17.6 : :20% increase: :25% decrease: 1.72: 3.10 : : 30% decrease: :30% decrease: 3.3.1 Weathering. There shall be no visud discoloration of lenses when assembled into faceblanks and tested for weathering in accordance with KL-F-5lllO. b Provided by IHSNot for ResaleNo reproduction o
15、r networking permitted without license from IHS-,-,-MIL-F-5LLOSA Y2 W 7779906 023q530 3 = MIL-F-51109A( EA) 3.4 Preproduction sample. Prior to the start of regular production, 30 (20 trimmed and 10 untrimmed) sample faceblanks from each mold cavity and 16 test slabs shall be produced using the same
16、methods, materials, equipment, and rubber formulation as will be used during regular production. in formulation, operating conditions, or molds shall require a new prepro- duction sample. Any change 3.5 Resistance to oxygen-pressure aging. The faceblank shall show no cracking or increased hardness o
17、r tackiness after 72 hours of accelerated aging in oxygen, at a pressure 2.10 2 0.10 megapascals and a temperature of 70 2 1 C, as cpecifiea in table II. 3.6 Workmanship. The faceblank inner and outer surfaces shall be smooth and free from imperfections such as pits, bumps, porous areas, cracks, che
18、cks, flash, abrasions, or blisters. free from holes, bubbles, and foreign matter. on outer surfaces shall not be considered as flash when closely trimmed. Faceblanks with small flaws in noncritical areas may be repaired provided there is no change in the formulation or surface continuity. sealing ar
19、ea contacting the wearers skin, the lens sealing surface, the inner surface area of the air inlet an outlet stems, and the inner surface area of the microphone cable stem shall be considered as critical areas of the faceblank. The rubber shall be compact and Ridges of mold parting lines The peripher
20、al Rips, tears, or punctures shall be considered as damage. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. 4.1.1 Suppliers responsibility. Unless otherwise specified in the con- tract or purchase order, the supplier is responsible for the performance of all inspection requirement
21、s as specified herein. Except as othenise spec- ified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements spec- ified herein, unless disapproved by the Government. The Government reserves the right to perform any
22、of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to specified requirements. 4.1.2 Objective evidence. 4.1.2.1 Materials. The supplier shall provide objective evidence accept- able to the contracting officer that the
23、 requirements of 3.1, 3.3.1 and section 5 for which specific inspection has not been provided in this spec- if ic at ion have be en s at i s fi ed . 4.1.2.2 Toxicity. After date of award of contract, and within the time specified in the contract, and without additional cost to the Government, 5 Prov
24、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-51109A( EA) the contractor shall submit the information listed below which will con- stitute his evidence for establishing the nontoxicity of the formulation. The U.S. Army Surgeon General will act as
25、 advisor to the Contracting Officer in evaluating this data for determining if the formulation and parts are acceptable. formulations may be classified as “company confidential“ and this information will be so treated by the Government. The information relating to the description of the candidate a.
26、 Information relating to candidate formulations : (1) The name of the contractor and the producing subcon- tractor, if any. (2) Description of the item and end item and copies of applicable specifications shall be included. (3) The number of items under procurement for which the proposed formulation
27、 shall be used. (4) A description of the candidate formulation shall include: (a) The chemical and trade names of the ingredients. (b) The quantity of each ingredient, including the range of variation that can be tolerated without loss of quality in the finished item. parts by weight. Quantities sha
28、ll be expressed in percent by weight and (c) The proposed mold lubricants , dusting powders, wet spray or other materials used in the manufacturing process. () Proposed cure times and temperatures. (e) Results of previous toxicity evaluation demonstrat- ing acceptability or evidence of prior Governm
29、ent approval of the proposed formulation. (f) Information and data to substantiate the nontoxicity of the product. programs the contractor has carried out to prove nontoxicity, such as prior patch testing with unlined items the use of which involves direct contact with the skin; evidence that the pr
30、oposed formulation is the same as that used in comercial products; and information on the nature, extent , and length of time of his comercial experience with the formulation. Other evideiice may include references to technical or other scientific public- ation, commercial laboratory reports, opinio
31、ns or statenients of recognized authorities and agencies in the field of dermatology, and any other pertinent data. This information will include a complete description of any i. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-51109A( EA) b.
32、Patch testing. If the above information is not sufficient to establish nontoxicity of the rubber formulation, the contractor shall perform 200 patch tests under the supervision of competent medical authorities in the field of dermatology. These patch tests shall be at no additional cost to the Gover
33、nment and shall be conducted in accordance with the prophetic patch test method described in “Occupational Diseases of the Skin“ by Schwartz, Tulipan, and Birmingham, in the patch tests will be furnished by the Government upon written re- quest of the contractor. formulation shall not produce positi
34、ve reactions in excess of that of the control rubber patches. tion thereof by the medica3 authorities described above shall be fur- nished to the contracting officer. A control rubber for use The patches composed of the candidate rubber A copy of the test results and the evalua- 4.2 Classification o
35、f inspections. The inspection requirements speci- fied herein are classified as follows: (a) Preproduction inspection (see 4.3). (b) . Quaiity conformance inspection (see 4.4). 4.3 Preproduction inspection. 4.3.1 Examination. Fifteen of the sample faceblanks shall be inspected for all requirements o
36、f the applicable drawings and this specification. 4.3.2 Tests. Fifteen faceblanks and 16 test slabs shall be tested in accordance with 4.4.4.3 (see table 11) . 4.3.3 Acceptance/rejection criteria, The preproduction sample shall meet the examinations and tests specified by 4.3.1 and 4.3.2 to be accep
37、table. The supplier shall obtain wAtten app physical damage from the supply source to the first receiving activity for immediate use or further processing. Shipping containers shall be in com- pliance -with the des and regulations applicable to the mode of transporta- .tion. Marking shall be in conf
38、ormance with FED-STD-123 and shall include the contractors name, address, and contract number. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-7 MIL-F-SLLOSA 42 9777706 02345Lb 4 ? 5.2 Repair parts. When this as a repair part, preservation, specif
39、ied on the packaging data Stock Number. item is being procured for storage and iss:ie packaging, packing, and marking shall be 2s sheet which is identified by its National 6. NOTES 6.1 Intended use. The faceblank covered by this specification is intended for use as a component of tank and aircraft c
40、hemical-biological masks. 6.2 Ordering data. (a) (b) Size of faceblank. (c) Applicable drawings. (a) Preproduction: Procurement documents should specify the following : Title, number, and date of this specification. (i) Time allowed for suppiier submission of samples for Govern- ment test and evalua
41、tion after award of contract. when testing is performed by the Government. whether or not to proceed with production. (2) (3) Name and address of test facility and shipping instructions Time required for the Government to notify the supplier 6.3 Equivalent cure. Slabs and faceblanks of the same stoc
42、k and gage are considered to have equivalent cures or the same state of vulcanization when : (a) (b) (c) Their free-sulfur contents do not vary more than 10 percent. Their average tensile stress values at any given elongation Their curing times can be equated in the following equation: (other than u
43、ltimate elongation) do not vary more thar, f 2.5 percent. where: tl = minutes of cure at temperature T1 t2 = minutes of cure at temperature T2 T1 = temperature (OF) of cure for time tl T2 = temperature (OF) of cure for time t2 11 Provided by IHSNot for ResaleNo reproduction or networking permitted w
44、ithout license from IHS-,-,-MIL-F-51107A Li2 = 79777Ob 0234517 b MIL-F-51109A( EA 1 .- - -1 -. . . . _. - -. f -/ Wi Ut E 6 ! i wt -I .u gr II C Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-F-53309A 42 m 7999906 0234538 8 m MIL-F- 5iiOgA( EA
45、) For convenience, the nomograph in figure 1 may be used instead of the mathematical computation time-temperature relationships in determining equivalent cure. 6.4 Major change. The term applies to any change in formulae, processing, or curing of currently approved rubber stocks which may induce tox
46、ic charac- teristics and cause casualties. The major change should be considered effected when one or more of the following conditions occur: (a) (b) (c) (d) (e) Components of formulae are varied in excess of the limitations The addition or deletion of one or more components of formulae. Substitutes
47、 for one or more components of formulae, without Deviation from the submitted factory mold cure exceeding # 3OC Use of mold lubricants, dusti.ng powder, or wet sprays not used stated in the manufacturers tolerance (see 4.1.2.2). advance approval of the Government. or -6Oc, even though equivalent cur
48、e is attained. in preparation or cure of the original samples submitted for toxicity approval. 6.5 Aging. Aging at 100 2 l0C for continuous period of 24 hours is slightly more severe on rubber than aging at 70 + 1C for 168 consec- utive hours; therefore, specimens that fail to meet requirements when
49、 aged at the higher temperature may be discarded and replaced by new specimens aged at TO0 - + 1C for 168 consecutive hours. 6.6 Interplant shipments. Packaging for supplies and materials which will not enter the military supply system. Typical interplant shipments are ship- ments from a vendor to a subcontractor or a prime contractor, or from a sub- contractor to a prime contractor, or from a vendor or cont
