1、Designation: C916 85 (Reapproved 2007)C916 14Standard Specification forAdhesives for Duct Thermal Insulation1This standard is issued under the fixed designation C916; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This specification covers minimum ma
3、terial requirements, and safety precautions in application, for adhesives to bondthermal insulation duct liner on the interior surfaces of sheet metal air conditioning ducts; and for coating exposed edges and jointsof duct liner thermal insulation to minimize erosion of insulation fibers by air move
4、ment.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to address all of the safety concerns, if a
5、ny, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. For specific precautionary statements, see Sections 7 and 9.2. Referenced Documents2.1 ASTM St
6、andards:2C168 Terminology Relating to Thermal InsulationD93 Test Methods for Flash Point by Pensky-Martens Closed Cup TesterD903 Test Method for Peel or Stripping Strength of Adhesive BondsD1151 Practice for Effect of Moisture and Temperature on Adhesive BondsE84 Test Method for Surface Burning Char
7、acteristics of Building Materials2.2 Other Standards:NFPA No. 30, Flammable and Combustible Liquids Code3SMACNA Duct Liner Application Standard4ACGIH Threshold Limit Values53. Terminology3.1 Definitions:3.1.1 threshold limit value (TLV)the concentration in parts of vapor per million parts of air, by
8、 volume at 25C and 101.3 kPa(1 atm) pressure. This value is an indication of the relative inhalation toxicity hazard of vapors from volatile solvents used inadhesives. Data on TLV of materials are published annually by ACGIH.3.1.2 For definitions of other terms on thermal insulating materials used i
9、n this specification, see Terminology C168.3.2 Definitions of Terms Specific to This Standard:3.2.1 flammable vehiclein an adhesive, the liquid portion having a flash point as determined by Test Methods D93.3.2.2 nonflammable vehicle in an adhesive, the liquid portion having no flash point as determ
10、ined by Test Methods D93.1 This specification is under the jurisdiction ofASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.33 on Insulation Finishesand Moisture.Current edition approved Nov. 1, 2007Sept. 1, 2014. Published January 2008September 2014. Orig
11、inally approved in 1979. Last previous edition approved in 20012007as C916 85(2001)(2007).2 . DOI: 10.1520/C0916-85R07.10.1520/C0916-14.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume inf
12、ormation, refer to the standards Document Summary page on the ASTM website.3 Available from National Fire Protection Association (NFPA), 1 Batterymarch Park, Quincy, MA 02169-7471, http:/www.nfpa.org.4 Sheet Metal and Air Conditioning Contractors National Assn., 4201 Lafayette Center Drive, Chantill
13、y, VA 22021.201511219, http:/www.smacna.org.5 Available from American Conference of Governmental Industrial Hygienists, Inc. (ACGIH), 1330 Kemper Meadow Dr., Suite 600, Cincinnati, OH 45240,http:/www.acgih.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM
14、standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by
15、 ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Classification of Adhesives4.1 Adhesives supplied under this specification are classified as follows:4.1.1 Type IAn adhesive in which t
16、he vehicle is nonflammable in the liquid (wet) state and which will pass the edge-burningtest of 6.2.4.1.2 Type IIAn adhesive in which the vehicle is nonflammable in the liquid (wet) state and which will not pass theedge-burning test of 6.2.4.1.3 Type IIIAn adhesive in which the vehicle is flammable
17、 in the liquid (wet) state and which will pass the edge-burningtest of 6.2.4.1.4 Type IVAn adhesive in which the vehicle is flammable in the liquid (wet) state and which will not pass the edge-burningtest of 6.2.5. Ordering Information5.1 Attention of the purchaser is directed to the fact that four
18、types of adhesives are available under this specification. If thepurchaser does not specify which type is desired, the supplier shall furnish Type I only. Other purchaser options are described in6.1.4 and 6.1.5.6. Physical Requirements6.1 Requirements Applicable to All Types:6.1.1 Bonding StrengthTh
19、e adhesive shall have a bonding strength of not less than 0.5 lb/in. (9.0 g/mm) of width after testingunder each condition of room temperature, high humidity, and heating, as specified in 7.2, 7.3, and 7.4.6.1.2 Bond Retention After Heat-AgingDuct liner fiber shall remain bonded to at least 75 % of
20、the total area of each specimenafter testing as specified in 7.5.6.1.3 Flame Spread and Smoke DevelopedAdhesive for duct liner shall have a fire hazard classification not to exceed 25 forflame spread and 50 for smoke developed. Classification shall be determined by Test Method E84.Areport from a qua
21、lified testinglaboratory to indicate that fire hazard classification does not exceed that specified is acceptable. Tests shall be conducted as statedin 7.6.6.1.4 Storage StabilityThe adhesive shall meet the requirements specified herein after completion of storage for a period of6 months under the c
22、onditions specified in 7.8. If acceptable to the purchaser, and instead of performing a storage stability test oneach shipment, the manufacturer shall provide evidence that previous commercial lots of the adhesive have met satisfactorily the6 months storage stability requirement.6.1.5 Other Physical
23、 RequirementsOther requirements may be mutually agreed upon between the purchaser and the seller.These requirements may include viscosity, bonding time, solids content, color, and odor.6.2 Edge Burning Test for Types I and III AdhesivesIn addition to the general requirements stated above, Types I an
24、d IIIadhesives shall meet the following requirement: When tested by the method described in 7.7, there shall be no residual flame orcontinuous burning of any specimen for more than 3 s after the test flame is extinguished.7. Test Methods7.1 Significance and UseThe tests described herein are intended
25、 to evaluate the suitability of the adhesive for service inbonding fibrous glass thermal insulation duct liner by exposing specimens to simulated service conditions. The edge-burning test(7.7) is useful for distinguishing between adhesive types to identify flame-retardance after curing of the adhesi
26、ve.7.2 Bonding Strength at Room Temperature:7.2.1 Prepare the specimens in accordance with Test Method D903. The specimens shall be composed of 18-gage (0.05-in.,1.3-mm) galvanized steel bonded to 8-oz (0.3-kg/m2) cotton canvas. The galvanized steel shall have been cleaned with solvent anddried.7.2.
27、2 Apply the adhesive by brushing or spraying in accordance with the manufacturers recommendation for thickness. Applythe adhesive to the metal surface only. As soon as the applied adhesive has become tacky as determined by finger pressure, bondthe canvas to the metal. Immediately after bonding, roll
28、 the canvas with a hand roller weighing 5 lb per lineal inch of roller (90kg/m) (that is, a roller 4 in. long should have a total weight of 20 lb), to ensure uniform contact between adherends. Conditionthe specimens for 24 h at a relative humidity of 50 6 2 % at 73.4 6 2F (23 6 1C). Test the specime
29、ns as described in TestMethod D903 except that the rate of travel of the power-actuated grip of the testing machine shall be 2 in. (50 mm)/min.7.3 Bonding Strength at High HumidityPrepare the specimens as described in 7.2 except that after the 24-h conditioningperiod specified, further condition the
30、 specimens by exposure to a relative humidity of 95 % minimum at 73.4 6 2F (23 6 1C)for 24 h. Conduct the testing as specified in Test Method D903 immediately after removal of the test specimens from theconditioning atmosphere and preferably under the same conditions. The rate of jaw separation of t
31、he testing machine shall be 2in. (50 mm)/min.C916 1427.4 Bonding Strength at While HeatedPrepare the specimens as described in 7.2 except that after the 24-h conditioning periodspecified, further condition the specimens for 7 days in a circulating air oven maintained at a temperature of 15862F (7061
32、C).Conduct the testing as specified inTest Method D903 at a temperature of 15862F (7061C) at 2 in. (50mm)/min jaw separationspeed.7.5 Bond Retention After Heat AgingPrepare a flat piece of 18-gage (0.05-in., 1.3-mm) galvanized steel 6 by 16 in. (150 by400 mm) by cleaning with solvent and drying. App
33、ly the adhesive to one side by brushing or spraying in accordance with themanufacturers recommendation for thickness. As soon as the adhesive has become tacky, as determined by finger pressure, bondto it a single thickness of 1-in. (25-mm) thick by 6 by 16-in. (150 by 400-mm) duct liner insulation o
34、f 3-lb/ft3 (48-kg/m3) nominaldensity conforming to SMACNADuct LinerApplication Standard. Immediately after bonding, use the hand roller on the duct lineras described in 7.2.2 to ensure uniform contact between adherends. Using a sheet metal break or other suitable forming technique,after 1 h at room
35、temperature, bend the specimen to a rectangular tubular shape with the duct liner on the inside, thus forming ahollow duct 4 by 4 by 6 in. (100 by 100 by 150 mm). Prepare two such specimens. Allow the formed specimens to age for 24 hat room temperature. Using test exposure No. 11 of Test Method D115
36、1, expose the specimens for 90 days at 158F (70C) in acirculating air oven with uncontrolled humidity. Remove the specimens and condition them as described in 6.2.3 of Test MethodD1151. Unbend each specimen so that it is essentially flat. Then remove the duct liner insulation by pulling away from th
37、e metalbeginning at the edges. Observe and report the proportion of the total specimen area to which fibers of duct liner insulation remainbonded.7.6 Flame Spread and Smoke DevelopedPrepare test specimens on 14-in. (6-mm) fiber-cement board, and test as specified inTest Method E84. Prepare specimens
38、 in triplicate. Prepare the specimens using the lowest coverage specified by the manufacturer,that is, that coverage which will yield the maximum recommended thickness of adhesive. Allow sufficient drying time to elapsebefore testing the specimens to assure that any residual volatile ingredients sha
39、ll not exceed 1 weight %.7.6.1 If the results of two tests differ by more than 10 flame spread points, test the third specimen and report all three results.7.7 Edge-Burning Test (applicable to Types I and III):NOTE 1This is a small-scale test for which precision and bias have not been determined. It
40、 is useful for quality control evaluations.7.7.1 This test should be used to measure and describe the properties of materials, products, or assemblies in response to heatand flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk ofmat
41、erials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire riskassessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular enduse. This standard is used to measure an
42、d describe the response of materials, products, or assemblies to heat and flame undercontrolled conditions, but does not by itself incorporate all factors required for fire-hazard or fire-risk assessment of the materials,products, or assemblies under actual fire conditions.7.7.2 Coat three specimens
43、 of 2-in. thick by 10-in. long by 3-in. wide (50 by 250 by 75-mm) duct liner insulation of 3-lb/ft3(48-kg/m3) nominal density, conforming to SMACNA Duct Liner Application Standard, on the cut-edge face with the adhesiveunder test. Prepare the 2-in. thick specimens by laminating two 1-in. (25-mm) thi
44、ck pieces (back-side to back-side) with theadhesive under test. Control the application and thickness in the following manner: Place a piece of smooth household aluminumfoil on a smooth hard horizontal surface. Apply to it a coat of wet adhesive at least 11 in. long and 3 in. wide (280 by 75 mm).App
45、ly with a metal blade about 116 in. (1.6 mm) thick, having cut into the working edge a notch 3 in. long and 116 in. deep.7.7.3 Pour a pool of adhesive at one end of the aluminum foil strip and, using the notched blade held at an angle of 90 to thesurface, spread the adhesive uniformly over the foil,
46、 leaving a path of wet adhesive 3 in. (75 mm) wide and of uniform thickness.7.7.4 Immediately after the wet adhesive is drawn out in this way, lay a strip of duct liner insulation into it, with the 2-in.(50-mm) wide face of the cut edge downward. Use sufficient pressure to assure complete contact be
47、tween the wet adhesive andthe entire cut-edge face of the duct liner insulation.7.7.5 After 10 s contact, peel away the duct liner insulation from the wet adhesive and allow to dry, coated face upward, at roomtemperature for 24 h. Prepare three such specimens.7.7.6 Suspend the specimen from a suitab
48、le clamp at an angle of 45 in a draft-free location with the adhesive-coated surfacefacing downward. Adjust the flame of a butane gas-fueled cigarette lighter so that it is 1.5 to 2.0 in. (38 to 50 mm) high.Alternatively, a micro-bunsen burner using propane gas fuel adjusted to the same height may b
49、e used. The lighter or burner shouldhave firm support. Position the clamped specimen so that the lower end of the coated surface is suspended in the vertical flamewhich impinges upon it 1 in. (25 mm) above the bottom edge and not more than 12 in. (12.5 mm) above the gas jet orifice of theopened lighter or micro-bunsen burner.7.7.7 After 15 s extinguish the ignition flame and observe the length of time the adhesive-coated face continues to burn. Reportthe results of all three tests.7.8 Storage StabilityStore the adhesive for a period of 6
