1、 “M-AL1754 July 1, 1973 - 1 FEDERAL -SPECIFICATION ADHESIVE AND SEALING COMPOUND, . EPOXY, METAL FILLED This specification was approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal agencies. I 1. SCOPE 1.1 Scope. This specification establis
2、hes the requirements for one type of metal filled, room temperature curing, two part epoxy adhesive and sealing compound. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issues in effect on date of invitation for bids or request for proposal, form a part of this specification to the exte
3、nt specified herein: Federal Specifications: QQ-A-25015 - Aluminum Alloy Alclad 2024, Plate and Sheet PPP-B-566 - Boxes, Folding, Paperboard PPP-B-636 - Box, Fiberboard PPP-B-665 - Boxes, Paperboard, Metal Stayed (Including Stay Material) PPP-B-676 - Boxes, Set-up PPP-C-96 - Cans, Metal, 28 Gage and
4、 Lighter Federal Standards: Fed, Std. No. 123 - Marking for Domestic Shipment (Civilian Agencies) Fed. Test Method Std. No. 141 - Paint, Varnish, Lacquer, and Related Materials; Methods of Inspection, Sampling, and Testing (Activities outside the Federal Government may obtain copies of Federal Speci
5、fications, Standards, and Handbooks as outlined under General Information in the Index of Federal-Specifications and Standards and at the prices indicated in the Index. The Index, which includes cumulative monthly supplements as issued, is for sale on a subscrip tion basis by the Superin tendent of
6、Documents, U. S. Government Printing Office, Washington, DC 20402. (Single copies of this specification and other Federal Specifications required by activities outside the Federal Government for bidding purposes are available without charge from Business Service Centers at the.Genera1 Services Admin
7、istration Regional Offices in Boston, New York, Washington, DC, Atlanta, Chicago, Kansas City, MO, Ft. Worth, Denver, San Francisco, Los Angeles, and Seattle, WA. (Federal Government activities may obtain copies of Federal Specifications, Standards, and Handbooks and the Index of Federal specificati
8、ons and Standards from established dis tribution points in their agencies.) - Military Standards: MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes MIL-STD-129 - Marking for Shipment and Storage (Copies of Military Specification$ind Standards required by contractors in connec
9、tion with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) FSC 8040 THIS DOCUMENT CONTAINS . PAGES Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted without license fr
10、om IHS-,-,-“U-A-1754 c 2.2 Other publications, The followiv documents form a part of khis specification to the extent specified herein. Unless a speci.fic issue is identified, the issue in effect on date of invitation for bids or request for proposal shall apply. American Society for Testing and Mat
11、erials (ASTM) Standards: D 618 - Conditioning Plastics and Electrical Insulating Materials for Testing D 638 - Tensile Properties of Plastics D 695 - Compressive Properties of Rigid Plastics D 790 - Flexural Properties of Plastics D 1002 - Strength Properties of Adhesives in Shear by Tension Loading
12、 (Metal-To- D 2471 - Gel Time and Peak Exothermic Temperature of Reacting Thermosetting D 2651 - Preparation of Metal Surfaces for Adhesive Bonding D 2730 - Sag Flow of Highly Viscous Materials Met al) Plastic Compositions Materials, 1916 Race Street, Philadelphia, PA 19103,) (Application for copies
13、 should be addressed to -the American Society for Testing, and 3. REQUIREMENTS 3.1 Material. The adhesive shall consist of two components, a base polymer and an activator, so compounded and formulated that whea mixed in accordance with instructions (Bee 3.5) shall produce an adhesive meeting the req
14、uirements of this specification. 3.1.1 Base polymer. The base polymer shall be of the epoxy type, and shall contain finely divided particles of aluminum, steel, or both, and such other fillers as are required. 3.1.2 Activator. The activator shall be of the polyamide type, and may contain fillers or
15、such other inert ingredients as may be required. 3.1.3 Thinner, If required for attainment of specified working characteristics (see 3.2), a thinner compatible with the nixed adh.esive components shall be furnished. 3.1.4 _Porme The base polymer shall be of paste form. The activator shall be a paste
16、 or liquid; and the thinner, if required, shall be a liquid. The forms in all cases shall be such as to assure conformance with 3.2. 3.1.5 Color. The color of the mixed adhesive shall be neutral gray, and color differences between the mixed adhesive and either base resin or activator shall be et lea
17、st 5 NES units, 3.1.6 Corrosion. The adhesive shall be non-corrosive to setal surfaces being bonded. . . . :C 3.1.7 Solids-. The complete adhesive system, exclusive of any thinner which may be added for attainment of working Characteristics (see 3.1.3), shall be free of volatile solvents, The averag
18、e nonvolatile matter in the adhesive system shall be not lees than 97.0 percent when tested as specified in 4.4.5. 3.2 Working characteris tias. 3.2.1 Application. The adhesive, when mixed according to the manufacturers instructions (see 3.5), shall be smooth, free of lumps, and shall be of consiste
19、ncy suitable for application, The individual components shall not settle, nor shall the mixed components separate or settle out during normal pot life. The adhesive shall be capable of being applied at room temperatures between 60 and lOOP, (16* to 38OC.1 and at relative humidity of not more than 75
20、 percent. 3.2.1.1 Sag flow, The mixed adhesive eha91 mot exhibit sag flow of more than 0.5 inch when tee red as specified in Table III. . .“ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MMH-A-1754 5r 3.2.2 Application life (pot life. The applicati
21、on life of the adhesive-when mixed and ready for use at 75 2 5F. (23.9 5 2.8C.) shall be at least 15 minutes for a 100 gram mass and at least 30 minutes for a 10 gram mass when tested as specified in Table III. . 3,2.3 Curing time. The adhesive shall attain the minimum strengthfequirements specified
22、 herein when.cured 24 hours at 75 5F. (23.9 2 2.8OC.). Full cure shall not exceed 7 days. 3.3 Mechanical properties. Mechanical properties of test specimens prepared and tested as specified in Section 4 shall conform to the respective requirements listed in Table I. TABLE I. Mechanical properties Te
23、nsile shear, psi at 75 + 5F. at 140F. at -67F. Tensile strength, psi Flexural strength, psi Flexural bond strength Compressive yield, psi . 2300 minimum 1000 minimum 1500 minimum 2500 minimum 5500 minimum 5000 minimum 150 1bs.finch bond minimum 3.4 Storage stability, After the separate components ar
24、e stored as specified in 4.4.6, the prepared adhesive (see 3.5) shall conform to the following requirements: (a) All requirements of 3.2.1. (b) Sag flow shall not exceed plus 10 percent of the maximum specified in (c) Application life shall vary not more than minus 10 percent from the (d) Curing tim
25、e shall vary not more than plus 10 percent from the values (e) Tensile shear shall vary not more than minus 5 percent from the values 3.2.1.1. values specified in 3.2.2. specified in 3.2.3. specified in Table I. 3.5 Instruction sheet. The manufacturer shall provide instructions for use with each kit
26、 of adhesive. The instructions shall include the following information: (a) Proportions by weight of components to be mixed; mixing instructions, - including any controls necessary during mixing; and maximum pot life.of the mixed adhesive. range, application temperature, and acceptable glue line (bo
27、nd) thickness range. (c) Typical time, temperature, and pressure for each segment of the complete curing cycle, giving minimum and maximum limits for each condition. (d) Instructions for use of thinner and clean-up. (f) Storage, handling, and shelf life information. (b) Application instructions, inc
28、luding spread method, number of coats, weight . (e) Necessary safety precautions to be observed throughout all operations. The instructions may be included as a separate sheet or may be incorporated into the kit label. 4. QUALITY ASSURANCE PROVISIONS . 4.1 Responsibility for inspection. Unless other
29、wise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the supplier may use his own or any other facilities suitable for the performance of
30、the inspection requirements. specified herein, unless disapproved by the Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-wu-A-1754 9 Government. The Government reserves thenright *to perform any of the inspections set orth in the specification, where
31、 such inspections are deemed necessary to aaaure that supplies and services conform to prescribed requirements. 4.2 . k.2.1 W. Bor purposes of sampling, a lot shall consist of all adhesive manufactured as one batch and offered for delivery at one time. 4.2.2 sampl.inp, for inspection of filled conta
32、iners. A random sample of filled containera ollall be selected in accordance with MIL-STD-105 at inspection level I and acceptablo quality level (AQL) = 2.5 percent defective to verify compliance with this specification regarding fill, closure, and marking, and other requirements not involving te ta
33、. 4.2.3 *!.inc OE construction of the conteiner 2nd the closure, for rvi.dzileo OE lealsoco, and %OE unsatisfactory ncrkings; ccch ELlled r-ontaiaor ahn11 also be gzc. zr) rlctcrane tira nrount OE contents. Any conta?encr in the sacplc havlng one or -.-:C dcier,te or under reqtlhed Eil1 shnlL be zcj
34、ected. If the nutber of dnfoctIm eo;aeo-lncrro %n 8r.y snopke exceeds the nceptoncc nuzber for the appropriate aae;lLn:. pLc;:t cif ML-8TD-105, the Lot presented by the oa?ple okall be rejcctec!. 4.3.2 Lcbiop-gf preporcly: E,.Z.G sirall be 5r.opoct:cd Zcarn%ncat the prnservateon, pacqn;, paakin, rin
35、d ,-a:i.n:, somply ?:%eh the requircnents in Section 5 of t!tis specbficntion. Defects ;:linll be scored in accordance vit11 Table IL. Dcfccts GE closure listed shall ba exaninad on oh%pping containass fully prcpnrcd for dcliverg. size, location, sequence, ur F:;:. . of application. i 1 B:iy compone
36、nts missing or ti:.-. I Inadequate application of cc!pononts such as incomplete closure of i container flaps, loose strapping, I inadequate stapling. Dietortioa ctf i container, as applicable. I Number per container is more or less than required. Net weight exceeds requirenen ts . i “ Provided by IH
37、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-IIMN-A-1754 4.3.3 =-acceptance tests. The sampJes sekected in accordance with 4.2.3 shall be subjected separately to the tests specified in 4.4. If any one of the samples fails to pass any one of the tests specified,
38、 the lot represented thereby shall be rejected. 4.5: Test procedures. The adhesive, mixed as recommended (see 3.5), shall be tested in accordance with Table III. Unless otherwise specified, all tests shall be after curing 24 hours at 75“ t 5F. . Test Tensile shear Tens i le s t reng th Flexural stre
39、ngth Flexural bond strength Compressive yield Sag flow Application time TARLE III. Test methods Paragraph . Giving Paragraph Further . . Information Requitement Method Giviqg ASTM D 1002 4.4.1 ASTE D 638 ASTE1 D 790 ASTPI D 695 ASTM D- 2730 ASTE1 D 2471 Table I Table I Table I Table I Table I 3.2.1.
40、1 - - - 4.4.2 4.4.3 4.4.4 - 3.2.2 4.4.1 Tensile shear strength. Adhesive shall be tested as specified in 4.4.1.1 or compliance with Table I. 4.4.1.1 Specimen preparation. Tensile shear shall be determined using aluminum alloy (QQ-A-250/5, 2024, T3, 0.063 inch thickness) panels that have been cleaned
41、 and prepared for bondLng in accordance with ASTM D 2651, Method A. Two, 1 x 4 inch panels, overlapped 0.500 5 0.01 inch with an adhesive bond line thickness of 0.001 to 0.005 inch shall constitute 1 test specimen. Fifteen test specimens shall be prepared and cutad as specified in 4.4. Testing shall
42、 be as specified in ASTM D 1002, at the temperatures described below: Temperature Conditioning Specimens Time, Minutes Tested 75 J- 5F. (23.9“ 9 2.8C.) - 5 140 5 2F. (60 9 1C.) 30 5 -67 9 ZF. (-55 5 1,“C.) 30 5 4.4.2 Flexural bond strength. Using a procedure similar to ASTM Method D 790, the flexura
43、l bond strength measurements are made by testing as a beam in flexure, a 0.5 inch overlap joint constructed 75th two s tee1 coupons O. 125 x 1 x 4 inches. The mid- point of the tester is placed on the center of the adhesive bond, the contact points 2 inches either side of the midpoint of the span. D
44、etermine compliance with Table I. 4.4.3 compressive properties. ASTM Hethod D 695 shall be used with the following addition: Test specimens may be cast or molded to test dimensions or machined to test dimensions from cast or molded stock. Condition test specimens in accordance with ASTM D 610. Deter
45、mine compliance with Table I. 4.4.4 Sap, flow. Sag flow shall be determined by ASTM Method D 2730 using the 114 inch channel. Check for compliance with 3.2.1.1. 4.4.5 Solids. Approximately 7 grams of the adhesive system shall be prepared by mixing recommended portions (see 3.5) by weight of the base
46、 polymer and activator, both of which have been conditioned at 750 5 5F. (23.9“ 5 2.8C.) for 24 hours. The mixture shall be allowed to cool at 75 5 5F. (23.9 T 2.8“C.) until the exothermic “ 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-HUM-h-175
47、4 reaction ceases. The specimen shall tten be,tested for nonvolatile matter by Method 4041 of Fed. Test Method Std. No, 141, Three“ samples shall be tested, and the average of the three shall be reported as solids in comp1,iance with 3.1.7. 4.4.6 Storage stabilit Store separate components in !rigina
48、l, unopened containers for one year afEer the date of manufacture at 75 + 10F. Test the adhesive, mixed as recommended (see 3.5), in accordance with Gethods specified in Section 4 of this specification for conformance with 3.4. The manufacturers authorized certification may be accepted in lieu of te
49、st data forconformance to 3.4. 5. PREPARATION FOR DELIVERY 5.1 Packagin , Adhesive shall be packaged in a 2, 6, or 11 ounce two-tube kit or bulk packaged ina pint, quart, or gallon kit as specified (see 6.2). Packaging shall be 1evel.A or C as specified (see 6.2). The kit shall be defined as the sum of the volumes f the base component and activator but not including any thinner (see 3.1.3) which may be furnished. 5.1
