1、* MIL-A-55LlOB AO 7799906 0097730 T F MIbA-554QB 23 March 1967 SUPERSEDING 20 February 1963 (see 6.6). MIL-A-5540A MILITARY SPECIFICATION ADHESIVE, POLYCHLOROPRENE This specification is mandatory for use by all Departments and Agencies of the Depart- ment of Defense. 1. SCOPE 1.1 Scope - This specif
2、ication covers neoprene adhesives for joining neoprene coated fabric to itself and to nylon. * 1.2 Classification - Adhesives shall be of the.following classes, as specified (see 6.1 and 6.6). Class 1 - Heat cure for manufacture (coating to coating, heat stable to 140“ F). Class 2 - Room temperature
3、 cure for manufacture (coating to coating, heat stable to 140“ F). Class 3 - Room temperature cure for repair (coating to coating, heat stable to 140“ F). Class 4 - Heat cure for manufacture (coating to nylon). - - Class 5 - Room temperature cure for repair (coating to nylon). 1 2. APPLICABLE DOCUME
4、NTS 2.1 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: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- A- 5540B SPECIFICAT
5、IONS Federal TT-P-143 TT-T-548 PPP-B-585 PPP- B- 59 1 PPP-B-601 PPP-5621 PPP-B-636 PPP-C-96 PPP-T-60 Military MIL-L-10547 MIL-(2-19002 STANDARDS Federal FED-STD-595 Military MIL-STD-105 MIL-STD-129 Paint, Varnish, Lacquer, and Related Materials; Packaging, Packing, and Marking of Toluene; Technical
6、Boxes, Wood, Wireb.ound Boxes, Fiberboard, Wood-Cleated Boxes, Wood, Cleated-Plywood Boxes, Wood, Nailed and Lock-Corner Box, Fiberboard Cans, Metal, 28 Gage and Lighter Tape, Pressure Sensitive Adhesive, Waterproof-for Packaging and Sealing Liners, Case, and Sheet, Overwrap, Water-Vaporproof or Wat
7、erproof, Flexible Cloth, Coated; and Tape, Coated Cloth- Chloroprene on Nylon, Pneumatic Life Preserver Colors Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-
8、,-MIL-A-5540B 80 W 7777706 0077732 3 W MIL-A-5540B (Copies of specifications, standards, drawings, and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 Other publication
9、s - The following document forms a part of this specification to the extent specified herein. Unless otherwige indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. CONSOLIDATED CLASSIFICATION COMMITTEE Uniform Freight Classification Rules. (Application f
10、or copies should be addressed to the Consolidated Classi- fication Committee, 202 Chicago Union Station, Chicago 6, Ill) 3. REQUIREMENTS 3.1 Qualification - The adhesives fnished under this specification shall be products which have been tested and have passed the qualification tests specified herei
11、n, and have been listed on or approved for listing on the applicable Qualified Products List. 3.2 Materials - The ingredients used in the manufacture of these products shall be of high quality, suitable for the purpose, and shall not cause deterioration of the materials withwhichthey come in contact
12、. The base polymer shall be polychloroprene. No natural, reclaimed, or other synthetic rubbers shall be used in the manufacture of these adhesives. 3.2.1 Formulation changes - The adhesives shall be approved only for the formulation for which qualification tests are made. Changes such as the adding
13、of pigments, hardeners, solvents, or fillers, changing color, or any other changes in formulation not authorized by the Naval Air Systems Command, shall be cause for designating the adhesive as a new material which shall not be considered approved. The manufacturer may submit the modified adhesive f
14、or approval under this specification, using a new manufacturers designation. * 3.3 Forms - Adhesives- may be either one-part or two-part adhesive, the latter to consist of a base and a separate accelerator. 3.4 Colors - The adhesive color shall approximate one of the . following colors, as specified
15、 in FED-STD-595 (see 6.2): Olive drab - 24087 Yellow - 23538 Red - 21158 Grey - 26081 Orange - 22246 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* MIL-A-5540B Green - 24227 Black - 27038 Blue - 25177 Neutral 3.5 Physical properties - The physic
16、al properties of the adhesives shall conform to the requirements specified in Table I. TABLE I PHYSICAL PROPERTIES TEST Viscosity (centipoises) As received After accelerated storage Strip adhesion Coating to coating As received (lbs. /inch width) (min) After bond aging (% of as received value) (min)
17、 After water immersion (lbs. / inch width) (min) Coating to nylon As received (lbs. /inch width) (min) After bond aging (96 of as received value) (min) After water immersion (lbs. / inch width) (min) T REQUIREMENTS CLASSES 1, 2 400 to 2000 “ 8 80 6 “ “ “ CLASS 3 400 to 2000 - 1/ 8 80 6 “ “ “ 400 to
18、2000 - 1/ “ “ “ 5 80 4 - 1/ Shall not vary from IfAs received“ viscosity by more than -20 +30 percent, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* * * MIL-A-5540B 3.5.1 Brushability - All five classes of adhesives shall be readily brushable (
19、i, e. , flow easily and cover surfaces adequately and evenly) when mixed and applied in accordance with the manufacturers instructions. All five classes of adhesives shall be readily brushable without thinning in the “As received“ and “After working life“ (6 hours after mixir,g) conditions. In addit
20、ion, Classes 3, 4, and 5 adhesives shall be readily brushable without thinning in the “After accelerated storage“ condition. 3.5.2 Working life - The working life for all five classes of adhesives shall be a minimum of 6 hours when prepared and tested as specified in 4.7.2. 3.5.3 Accelerated storage
21、 - Classes 3, 4, and 5 adhesive when stored as specified in 4.7.4 shall not gel or deteriorate and shall be readily brushable. 3.5.4 Dead load - The Classes 1, 2, and 3 adhesives when tested as specified in 4.7.6 shall be capable of supporting a dead load of 75 pounds for 24 hours at 140“ F (60“ C)
22、without separation or creep of any of the three seams tested. 3.6 Toxicity - The material shall have no adverse effect on the health of personnel. when used for its intended purpose (see 6; 4). 3.7 Workrnanship - The adhesive shall be prepared in accordance with the best commercial practice. It shal
23、l be free of suspended foreign matter which will appear later upon application. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specifie
24、d 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 inspections set forth in the specification where such inspections are deemed necessary to assure sup
25、plies and services conform to prescribed requirements. 4.2 Classification of tests - The inspection and testing of the adhesives shall be classified as follows: (a) Qualification tests (4.3). (c) Government production control tests (4.5). Quality conformance tests (4.4). 4.3 Qualification tests - 4.
26、3.1 Sampling instructions - Qualification test samples shall consist of 4 quarts of the adhesive base, together with the necessary accelerator for each color for which qualification is applied .“ for. The adhesive and accelerator shall be furnished in containers of the type to be used in filling con
27、tract orders. Samples shall be forwarded to the Supply Officer, Naval Air Engineering Center, Philadelphia, Pennsylvania 19112, marked Attention: Director, Aeronautical Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo r
28、eproduction or networking permitted without license from IHS-,-,-L flIL-A-5540B 80 9997906 0097736 O m MIL-A-5540B 4.4.3 Visual inspection of filled containers - A random sample shall be selected from each batch in accordance with the table titled “Sample size code letters for ordinary inspection“ o
29、f MIL-STD-105 at Inspection Level I and an Acceptable Quality Level (AQL) of 2.5 percent defective to verify conformance to all requirements regarding fill, components (accelerator), closure, marking, and other requirements not involving tests. 4.4.4 Tests - The quality conformance tests shall consi
30、st of those tests specified in Table II and shall be in conformance with the applicable requirements of Section 3, except as noted. 4.4.4.1 In addition, the adhesive shall be subjected to any of the other tests specified herein which the procuring activity considers necessary to determine conformanc
31、e with this specification. 4.4.5 Resubmitted inspection lots - The paragraph titled IlRe- submitted lots“ of MIL-STD-105 shall apply. For visual inspection where the original acceptance number was zero, a sample size, represented by the next higher sample size code letter shall be chosen with the ac
32、ceptance number remaining zero. For testing, three containers shall be sampled. Retest of rejected lots may be authorized by the procuring activity only if the age of the lots in question at the time they are made available for the selection of retest samples, does not exceed the above 30-day period
33、. TABLE II QUALITY CONFORMANCE TESTS TESTS Viscosity As received r/ After accelerated storage Working life Brushability As received After accelerated storage After working life Strip adhesion, as received Coating to coating Coating to nylon Dead load APPLICABLE PARAGRAPH 4.7.3 4.7.2 4.7.1 4.7*5 4.7.
34、6 APPLICABLE CLASSES r- . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-5540B - 1/ The quality conformance test values for all classes shall not deviate from the original IlAs determined“ vdue by more than 510 percent for total solids, -20 “3
35、0 percent for viscosity (as received), and the working life of all classes shall be a minimum of 6 hours. Example for applying tolerance on total solids: The quality conformance value of an original total solids of 8 percent is from 7.2 to 8.8 percent. 4.5 Government production control tests - 4.5.1
36、 Sampling instructions - Two 1-quart samples of adhesive compound shall-be selected at random from each batch offered under contract. Samples shall be selected at the same time as the quality conformance test smples. The two Government production control test samples shall be furnished in containers
37、 of the type used in filling the contract or order, together with a copy of the quality conformance test results. These samples and test reports shall be forwarded to the agency indicated with the information requested as specified in 4.3.1. 4.5.2 If Government production control tests indicate that
38、 the batch represented does not conform to the qualification requirements of this specification, the product is subject to removal from the Qualified Products List. 4.6 Test conditions - 4.6.1 Standard temperature of tests - Unless otherwise specified, tests shdl be conducted at a temperature of 24
39、53 C (75 55 F), and relative humidity of 50 15 percent. 4.6.2 Application instructions - Test specimens shall be conditioned as follows: (a) Clean all surfaces to be bonded by washing three times with a cloth saturated with.toluene conforming to TT-T-548. A clean lint-free cloth shall be used for ea
40、ch washing. Allow to dry for a minimum of 20 minutes before applying the first coat of adhesive. .(bo Stir one-part material well. Stir two-part material (base and accelerator) well before and after combining as recommended by the manufacturer. The adhesive shdl not be thinned. (c) For Classes 1, 2
41、and 4, the number of coats (not to exceed three to each surface), the application of the adhesive, the drying time between coats and drying time 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-A-5540B BO 7777706 0077738 4 W * MIL-A-5540B before
42、 bonding shall be as specified by the manfacturer. For Classes 3 and 5, at least two and no more than three coats of adhesive shall be applied to each surface to be bonded. Allow 15 minutes drying time between each coat. . Before bonding, allow the final coat to dry 15 minutes or until the film deve
43、lops an agressive tack but will no longer transfer to the knuckle. (d) Roll the bonded seams together by bearing down with a force of at least 25 pounds, using a 2- pound metal roller having a diameter of approximateXy 2 inches and a width of approximately 2 inches. (e) All test specimens shall be c
44、ured without application of weight or pressure. Classes 1, 2, and 4 test specimens shall be cured in accordance with the manufacturer s instructions before testing. Room temperature cures shall be at 24 +3“ C (75 *5“ F) and relative humidity of 50 F5 percent. Elevated temperature cures shall be as s
45、pecified by the manufacturer. After curing, Class 1 - and Class 4 specimens shall be conditioned for at least 16 hours at 24 -1-3 C (75 +5 F) and relative humidity of 50 55 percent prior to testing. Curing time for Classes 2,3, and 5 test specimens shall not exceed 7 days. Class 3 test specimens sha
46、ll be cured for 7 days at 24 *3 C (75 -1-5“ F) and relative humidity of 50 -1-5 percent. All five classes sEall show no evidence of sponging or blowing under curing conditions. 4.7 Test methods - * 4.7.1 Brushability - The adhesives stirred and mixed, as required, shall be brushed to determine confo
47、rmance with the requirements specified in 3.5.1. 4.7.2 Working life - The adhesives shall be prepared in accordance with the manufacturer-s instructions, and allowed to stand at 24 +3 C (75 +5 F), and relative humdity of 50 55 percent, The adhesive shall be thoroughly stirred (for 1 minute) at 30-mi
48、nute intervals and brushability determined immediately after sitrring. A significant decrease in brushability shall be construed as the expiration of working life. 4.7.3 viscosity - 4.7.3.1 Apparatus - The apparatus used shall be a Brookfield 9 Provided by IHSNot for ResaleNo reproduction or network
49、ing permitted without license from IHS-,-,-MIL-A-5540B 80 799770b 0097739 - . MIL-A-5540B Viscosimeter, Model No, RVF, No. 2 spindle, 20 revolutions per minute (rpm). 4.7.3.2 Procedure - Viscosity determinations shall be made using a l-quart sample of adhesive mixed in accordance with the manufacturers instructions. Inspection results shall be obtained direct
