1、Fed. Spec. MMM-A-260B Dec 20, 1977 FEDERAL SPECIFICATION ADHESIVE, WATER-RESISTANT, (FOR SEALING WATERPROOFED PAPER) . This specification is approved by the Commissioner, Federal General Services Administration for the use of all Federal. 1. SCOPE Supply Service, gencies. 1.1 Scope. This specificati
2、on covers water-resistant adhesive intended for application to the seams in the manufacture and in the closure of waterproofed paper bags, wrappers, and case liners. 1.2 Classification. 1.2.1 Types, grades, and classes. The adhesive covered by this specification shall be of the following types, grad
3、es, and classes as spccif ied, (see 6.2) : ./-= a“ a Type I Type II - For hand application, by brushing. Grade A - For subsistence items. Grade B - For other than subsistence items. Class 1 - Solvent-based adhesive (see 3.10). Class 2 - Water-emulsion adhesive. Class 3 - Hot melt adhesive. - For app
4、lication by machine. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the issue /FSC 8040/ Y Provided by IHSNot for ResaleNo reproduction or networking permitted wit
5、hout license from IHS-,-,-MMM-A- 2 6 OC 5 listed in that issue of the Department of Defense Index of Specifications and Standards (DoD1SS)specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL TT-E-485 - Enamel Semi-Gloss, Rust-Inhibiti
6、ng. PPP-B-1055 - Barrier Material, Waterproofed, Flexible. PPP-C-96 - Cans, Metal, 28 Gage and Lighter. PPP-D-729 - Drums, Shipping and Storage, Steel, 55-Gallon (208 Liters). PPP-P-704 - Pails, Metal: (Shipping, Steel, 1 Through 12 Gallon.) STANDARDS FEDERAL Fed. Std. No. 123 - Marking for Shipment
7、 (Civilian Agencies). MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage. Attributes. (Copies of specifications, standards, handbooks, drawings and publications required by manufactures in connection with specific acquisition functi
8、ons should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following document forms a part of this specification to the extent specified herein. The issues of the documents which are indicated as DoD adopted shall be the issue listed
9、in the current DoDISS and the supplement thereto, if applicable. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 3951 - Standard Practice for Commercial Packaging (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 191
10、03) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-A-26OC c J.i. /e- f (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agen
11、cies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Fungi resistance (applicable only when specifically designated in the applicable contract or or
12、der). When specified, the adhesive shall be resistant to the growth of fungi. Test procedures and specific requirements shall be specified by the procuring activity (see 6.2). 3.2 Low temperature flexibility. The adhesive bond shall not separate from the paper nor fracture when tested as specified i
13、n 4.4.1. 3.3 Resistance to water penetration. The adhesive bond shall resist water penetration for a period of eight hours when tested as specified in 4.4.2. 3.4 Adhesion after subjection to heat. The adhesive bond shall not shear under a tension of less than 7.5 pounds (2.8 kg) when specimens are p
14、repared - from the adhesive and barrier material, conditioned at elevated temperature, and tested at room temperature in accordance with 4.4.3. 3.5 Initial tack (type II only). The adhesive shall develop sufficient adherence (tack) within 105 seconds plus 6 seconds of the time of application to sust
15、ain a suspended load of 3.5 oz. (100 grams) for a period of 60 seconds when tested as specified in 4.4.4. 3.6 Resistance to flow. The dried adhesive film shall show no separation of adhesive from the barrier material or adhesive flow when tested and examined after subjection to heat as specified in
16、4.4.3.2. 3.7 Stability. 3.7.1 Resistance to elevated temperature degradation. The adhesive shall conform to 3.3 and 3.5 when tested as specified in 4.4.5.1. 3.7.2 Resistance to low temperature degradation. The adhesi.ve shall conform to 3.3 and 3.5 when tested as specified in 4.4.5.2. 3.8. Consisten
17、cv (classes 1 and 2). 3.8.1 Consistency. as received. 3.8.1.1 Type I. Type I adhesive shall have a consistency such that it may be applied satisfactorily by means of commercially available bag and liner sealing equipment. Adhesive so applied shall not exhibit stringiness when machine transfer surfac
18、es are separated; shall not build up excessively on machine parts,and shall not foam. Compliance shall be determined visually, using standard available commercial sealing equipment, or as otherwise specified by the procuring activity (see 6.2). 3 Provided by IHSNot for ResaleNo reproduction or netwo
19、rking permitted without license from IHS-,-,-MMM-A-260C BO = 7777774 0006855 4 m *? -. . MMM-A-2 60C 3.8.1.2 Type II. Type II adhesive shall have a consistency such that it may be applied easily and satisfactorily by hand brushing. Compliance shall be determined in preparing the test specimens of 4.
20、4.3 or as otherwise specified in the contract or by the procuring activity. 3.8.2 Consistency after subjection to stability test conditions. After subjection to the procedures of 4.4.5.1 and 4.4.5.2, the adhesive shall comply with the requirements for consistency of 3.8.1, as applicable to the type
21、under test. Compliance shall be determined in accordance with that paragraph. 3.9 Toxicity. The adhesive shall have no adverse effect on the health of personnel as applicators or consumers. The manufacturer shall furnish the contracting officer with a certificate stating that the adhesive contains n
22、o known toxic material. 3.10 Condition in container. The adhesives supplied in liquid form shall be free from lumps, skins, foreign matter, settling, separation, and all other evidence of nonuniformity. It shall be capable of being made homogeneous without mechanical stirring. The hot melt adhesive
23、shall be solid, free from foreign matter and, when melted for application, shall be smooth and homogeneous. 3.11 Shelf storage life. When stored as specified in 4.4.6, the adhesive shall meet the requirements specified in 3.2, 3.5, 3.8.1, and 3.10. 3.12 Materials. Recycled and/or reclaimed materials
24、 shall be used to the maximum extent possible without adversely effecting the end product. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements
25、 as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perfo
26、rm any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. 4.2 Sampling. 4.2.1 Lot. For purposes of sampling, a lot shall consist of all adhesive - of one type, grade, and class, manufa
27、ctured as one batch, and offered for acceptance at one time, by one contractor. 4.2.2 Sampling for inspection of filled containers A random sample of filled containers shall be taken from each lot in accordance with MIL-STD-105 at inspection level I and acceptance quality level (AQL) equal to 2.5 pe
28、rcent defective to verify compliance with all stipulations of the specification regarding fill, closure, marking, and other requirements not involving tests. 4.2.3 Sampling for lot acceptance tests. From each inspection lot, a half-gallon (1.9 liter) sample shall be taken at random, from each of two
29、 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MMM-A-2bOC AO 7777774 OOOhSb b m. MMM-A- 2 6 OC containers (or a sufficient number of randomly selected smaller containers) so as to obtain two half-gallon (1.9 liter) samples, for use in testing. t.
30、 4.3 Inspection. 4.3.1 Inspection of filled containers. Each sample filled container selected in accordance with 4.2.2 shall be examined for defects of the container and the closure, for evidence of leakage, and for non-compliance with marking requirements. to determine the compliance with requireme
31、nts for amount of contents. Any container in the sample having one or more defects, or under the required fill, shall be rejected, and if the number of defective containers exceeds the acceptance number for the appropriate sampling plan of MIL-STD-105 (see 4.2.2), the lot represented shall be reject
32、ed. Rejected lots may be submitted for acceptance, in accordance wtih the requirements of MIL-STD-105 for resubmission, using tightened inspection for such reinspection. Each sample filled container shall also be weighed 4.3.2 Lot acceptance tests. The sample specimens selected in accordance with 4.
33、2.3 shall be subjected separately to the tests of 4.4. If specimens taken from either adhesive sample fail one or more of the tests, the lot represented shall be rejected. 4.4 Test Drocedures. k“- 4.4.1 Low temperature flexibility. 3 4.4.1.1 Material. Barrier material conforming to class L-4, of PPP
34、-B-1055 shall be used in type I adhesive tests and type II class 1 adhesives tests for low temperature flexibility, and class L-2 material of PPP-B-1055 shall be used in type II classes 2 and 3 adhesive tests for that property. Tests made using class L-4 material shall be made by bending (flexing) t
35、he two test specimens so that the crepe direction is perpendicular to the seam length. All tests made using class L-2 material shall be made with the adhesive applied to the untreated surface, and bonded to the treated surface. 4.4.1.2 Preparation of test specimens. Barrier material samples conformi
36、ng to 4.4.1.1 shall be cut into 8 by 2 1/2-inch (20.3 x 6.4 centimeter) pieces. The adhesive shall be applied in a smooth continuous film, in the thickness recommended by the manufacturer, and in a width of one inch along the 8-inch (2.0 centimeter) edge of one of the cut pieces of barrier material,
37、 and allowed to stand for approximately 30 seconds (except that class 3 - hot melt adhesives shall be allowed to stand for no longer than 5 seconds). Then an uncoated similar piece of barrier material shall be placed against the adhesive coated piece so that all edges coincide. The adhered (bonded)
38、area of the assembly shall be immediately subjected to a uniform pressure of 0.5 p.s.i. (3.5 x lo3 Pa) for 24 hours while in an atmosphere of 73O + 2F (22.7O + l.lC). removed-and the assembly allowed to set for an additional 24 hours at the above temperature and a relative humidity of 50, plus or mi
39、nus 5 percent. One inch (2.5 centimeters) shall then be cut from each end of the assembly perpendicular to the seam and discarded. The remainder shall be cut in two, so that two specimens, each 3 by 2-1/2 inches (7.6 by 6.4 centimeters) remain for testing. At the end of that time period, the pressur
40、e shall be 5 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MMM-A- 2 60C 4.4.1.3 Test procedure. Specimens prepared as in 4.4.1.2 shall be conditioned at O0 + 2OF (-17 + l.lC) for a period of 2 hours, and then bent immediately through 180 degrees
41、over a 3/4-inch (1.9 centimeter)-diameter mandrel, previously conditioned and maintained at the same temperature. The bending (flexing) shall be performed so that the length of seam is perpendicu- lar to the mandrel and made at the above temperature. The specimen shall then be turned over, without c
42、hanging the direction of the seam and the 180 degree bending repeated with the opposite face of the specimen against the mandrel, and then the specimen returned to its original position. operation shall be performed in not less than 3 seconds nor more than 5 seconds, with a maximum time interval of
43、5 seconds between the two operations. The adhesive bond shall be carefully examined visually for separation from the paper and for fracture. If such is in evidence, it shall be indication of failure to meet the requirement for low temperature flexibility. If the specimens are satisfactory when so ex
44、amined, they shall be conditioned for 2 hours at 73O + 2OF (22.7O + l.lC), and then used as specimens for the water penetraiion test of 7.4.2. Each bending 4.4.2 Water penetration. 4.4.2.1 Preparation of specimens. Specimens meeting the requirements and test of 4.4.1 for low temperature flexibility
45、shall be opened to form 3- by 3-inch (7.6 x 7.6 centimeter) specimens each having a 1-inch (2.5 centimeter) fin seam. The creased material shall be inspected visually to avoid the use of pinholed or split specimens which would affect the permeability of the material. A dry indicator reagent which ch
46、anges color due to the permeation of moisture (see 4.4.2,3), shall be sprinkled evenly over approximately 2-inch (5.0 centimeter) square area in the center of the 3- by 3-inch (7.6 x 7.6 centimeter) flat surfce of the T-shaped specimen. Care shall be taken to apply the reagent as evenly as practicab
47、le since bunching or piling of the reagent may cause erratic results. Place a 2-inch (5.0 centimeter) watchglass over the reagent and in the approximate center of the surface of the specimen, figure la. Brush away the reagent outside the watchglass and seal the watchglass to the test specimen using
48、a mixture of equal weights of beeswax and rosin. edges shall be coated, both sides with the wax mixture, but no wax applied to the cut edges of the adhesive seam, figure lb. The outer 1/4 inch (.64 centimeters) of th 3-inch (7.6 centimeter) 4.4.2.2 Test procedure. The specimens prepared as in 4.4.2.
49、1 shall then be floated on fresh tap water maintained at 700 + 50F (21.10 + 2.8OC) with the fin seam down, figure IC. the PPP-B-1055 materials (L-4 and L-2). The time required to cause a definite development of color to appear in the indicator shall be noted and recorded as the penetration time. The test shall be conducted using both of 4.4.2.3 Dry indicator. The dry indicator for use in the above test shall be composed of cane sugar, soluble starch, and methyl violet, pre
