ASTM C1536-2018 Standard Test Method for Measuring the Yield for Aerosol Foam Sealants.pdf

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1、Designation: C1536 10C1536 18Standard Test Method forMeasuring the Yield for Aerosol Foam Sealants1This standard is issued under the fixed designation C1536; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision

2、. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method determines the quantity of linear units of a foam sealant havingat a specified bead diameter that may beobtained f

3、rom a single can of aerosol product. Four (4) cans each container of an aerosol product. A minimum of four (4)representative containers of the aerosol product are required for each product this determination.1.2 The test method is intended to estimate the contents of the aerosol container (1) for pu

4、rposes of label statements, and (2)to provide the user information needed to estimate job requirements.1.3 Foam sealants are used for a variety of end-use applications but are primarily intended to reduce air movement in thebuilding envelope.1.4 Currently, two main foam sealant types are applicable

5、to this standard: single component polyurethane and latex.1.5 There is no other known standard test method to measure aerosol foam sealant yield.1.5 Values are reported in SI units only. Certain apparatus and supply items are referenced in inch-pound units for purchasingpurposes.1.6 This standard do

6、es not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine theapplicability of regulatory limitations prior to use.1.7 This

7、 international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT

8、) Committee.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and SealantsC1620 Specification for Aerosol Polyurethane and Aerosol Latex Foam Sealants3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 empty aerosol cancontainer (of foam sealant)the tim

9、eAn aerosol container that has reached the point at which theproduct flow of the foam sealant is less than 2.0 linear cm or 1.0 g of foam sealant can be no longer dispensed at a minimum rateof 1.0 g or 2.0 linear cm continuous foam bead duringwithin two continuous seconds of dispensing.seconds.3.1.2

10、 symbolsletter symbols are used to represent physical measurements and are defined in Table 1 and Table 2.3.1.3 yieldthe yield for an aerosol can of foam sealant product is the quantity of linear unit (meter) at a specified nominaldiameter of cured foam bead that is dispensed may be obtained from a

11、full can as defined by container. It is determined byfollowing this test method.4. Summary of Test Method4.1 Unless otherwise stated, Standard Condition shall be used.1 This test method is under the jurisdiction of ASTM Committee C24 on Building Seals and Sealants and is the direct responsibility of

12、 Subcommittee C24.61 on AerosolFoam Sealants.Current edition approved June 1, 2010Sept. 15, 2018. Published August 2010November 2018. Originally approved in 2002. Last previous edition approved in 20032010as C153603.10. DOI: 10.1520/C1536-10.10.1520/C1536-18.2 For referencedASTM standards, visit the

13、ASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an

14、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 ASTM is to

15、be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.2 Procedure ASuitable for foams aerosol foam sealant that can be measured by water displacement (intended only forpolyurethane foams).4.2.1 The midd

16、le of the aerosol canscontainers contents is dispensed used for dispensing bead specimens at specified bead sizesegments.size.TABLE 1 Data Acquisition and Calculation Form for Foam Yield Measurement Procedure ASample Description SymbolCanister Avg. initial weight (g) A = (A1 + A2)/2Container Avg. in

17、itial weight (g) A = (A1 + A2)/2Avg. weight after discharge (g) B = (B1 + B2)/2Avg. max discharged weight (g) A BSpecimen Preparation Temperature (C) . . .Relative humidity (%) . . .Cans starting weight (g) E = (E1 + E2)/2Containers starting weight (g) E = (E1 + E2)/2Cans finishing weight (g) F = (F

18、1 + F2)/2Containers finishing weight (g) F = (F1 + F2)/2Amount of discharged product for 10 beads (g) E FResults Total dischargeable volume of cured beads measured by waterdisplacement (mL) H5on5110 Pnwater5on5110 Pn1.0g/ccResults Total volume of 10 cured bead specimens determined by water displace-

19、ment (mL) H5on5110 Pnwater5on5110 Pn1.0g/ccYield (Y) based on linear metres of 1.0 cm bead per can Y5H sA2Bd2sE2Fd S178.5DALinear yield (meter) per container at 2.0 cm bead diameter Y5 H sA2Bd100 pisE 2FdTotal can Linear Yield (Y) in meters based on actual post cured bead di-ameter other than 1.0 cm

20、, dispensed per can. Y5H sA2Bd2sE2Fd S125piD2DLinear yield (meter) per container based on cured bead diameter, D, otherthan 2.0 cm. Y5H sA2Bd25 piD2 sE2FdA 78.5 is the factor to convert volume (cm3) to linear meter of 1 cm diameter bead.TABLE 2 Data Acquisition and Calculation Form for Foam Yield Me

21、asurement Procedure BSample Description SymbolCanister Avg. initial weight (g) A = (A1 + A2)/2Container Avg. initial weight (g) A = (A1 + A2)/2Avg. weight after discharge (g) B = (B1 + B2)/2Avg. max discharged weight (g) A BSpecimen Preparation Temperature (C) . . .Relative humidity (%) . . .Cans st

22、arting weight (g) E = (E1 + E2)/2Containers starting weight (g) E = (E1 + E2)/2Cans finishing weight (g) F = (F1 + F2)/2Containers finishing weight (g) F = (F1 + F2)/2Amount of discharged product for 10 beads (g) E FTotal volume of cured beads measured and calculated by pi r2 L (cm3)A HTotal volume

23、of 10 cured bead-specimens determined by adding upvolume of each bead measured and calculated by pi r2 L (cm3) HResults Total dischargeable volume foam per can (cm3) V5H sA2Bd2sE2FdResults Total dischargeable volume foam per can (cm3) V5H sA2BdsE2FdTotal Linear Yield (Y) based on 1.0 cm diameter bea

24、d per can Y5H sA2Bd2sE2Fd S178.5DLinear yield (meter) per container at 2.0 cm diameter Y5 H sA2Bd100 pi sE2FdTotal can Linear Yield (Y) in meters based on actual post cured bead di-ameter other than 1.0 cm dispensed per can. Y5H sA2Bd2sE2Fd S125piD2DLinear yield (meter) per container at cured bead d

25、iameter, D, other than2.0 cm. Y5H sA2Bd25 piD2 sE2FdA 78.5 is the factor to convert volume (cm3) to linear meter of 1.0 cm diameter bead.C1536 1824.2.2 The dispensed foam volume is determined by submerging the foam bead segmentsspecimens in water and measuring theweight of the displaced water. buoya

26、ncy.4.2.3 The yield (defined as the total bead length of a specified nominal bead diameter of cured foam per can) is calculated fromthe measured foam specimens volume.4.3 Procedure BSuitable only for foam sealants that cannot be measured by water displacement (Intended only for latexfoams).4.3.1 The

27、 middle of the containers contents is dispensed as a specified bead size segments.used for dispensing bead specimensat specified bead size.4.3.2 The volume of the foam bead is directly measured from the dried or cured foam bead segments by direct measurement.specimens. Yield is calculated from these

28、 measurements.NOTE 1Procedure A uses tap water (see 11.10) to which 4.2 g of Dioctyl Sodium Sulfosuccinate (70 % solids) and 1.2 g of SAG 10 defoamer per4 litresliters may be added as wetting agent/defoamer blend. This avoids false readings if air bubbles become a problem. The water is maintained at

29、 236 2C during the submersion part of the test. It is permissible for a single batch of water to be used up to 48 h.5. Significance and Use5.1 The yield measurement of aerosol foam sealants is used to indicate the amount of foam sealant that can be obtained froma single cancontainer of product.5.2 T

30、he yield does not predict the performance capability of the foam sealant product or its suitability for the intendedapplication.5.3 Procedure A was developed for use with products that can be volumetrically measured by submersion in water. ProcedureB was developed for product that cannot be measured

31、 by using a water displacement method.5.4 Yield is often dependent on the bead size dispensed. Extrapolation of test results using data measured for larger size beadsto estimate smaller sized beads has shown inaccuracies. Since yield will be reported based on the diameter of the cured bead (notiniti

32、al bead size), size of wet beads), the operator shall determine the nominal initial bead size required to produce a specificnominal cured bead diameter. This foam characteristic, called “post dispensing contraction” or “post dispensing expansion,” isdefined in Terminology C717.6. Apparatus6.1 A cont

33、ainer to hold water. Large enough to submerse foam samples.6.2 A metal grating heavy enough to wire grating or mesh attached to a thin, stiff rod, designed to keep foam samplessubmersed.submerged (see Fig. A1.2).6.3 Top Loading Balance, readable to 0.01 g.6.4 PTFE Release Agent, or equivalent.equiva

34、lent (such as non-silicone weak release coating).6.5 Fiberglass Insect Screening, Fiberglass, awning screen material or equivalent.6.6 Polyolefin Film or Mesh, Film, available from various local supply companies, companies. Use only smooth film with 2 milthickness or greater film of smooth finish on

35、ly, mattethickness (matte or textured finishes are not suitable.suitable).6.7 Corrugated Cardboard 200 Pound Weight Substrate, available in various sizes, trimmable to 70 6 10 120 6 15 cm forconvenient handling.sizes.6.8 Uncoated smooth brown wrapping paper.6.9 Meter Stick,Precision Ruler, readable

36、to the nearest 0.1 cm.6.10 Vernier Caliper, readable to the nearest 0.1 mm.7. Test Specimens and Substrates7.1 Prepare all test specimens at standard laboratory All foam bead specimens shall be dispensed and cured at conditions of 236 2C and 50 6 5 % relative humidity.7.2 Polyurethane foam sealant c

37、omplying with Specification C1620 (measured using Procedure A) shall be dispensed directlyon to polyolefin film covered rigid cardboard or suspended mesh or fiberglass screen mounted on a frame of convenient size,approximately 40 40 cm.minimum 30 by 20 cm area for each sample set.7.3 If in Procedure

38、 A, a fiberglass screen is used as the specimen substrate, it shall be lightly coated with a PTFE aerosol spraycomposition release coating equivalent (see 6.4). The coating shall be lightly brushed or sprayed-applied and allowed to air dry30-45 s for at least 1 min before the foam sealant is applied

39、. If polyolefin film or mesh is used, do not use the PTFE spray.7.4 Foam sealants complying with Specification C1620 that cannot be measured by water displacement, such as Latex(measured using Procedure B), shall be dispensed directly on to brown paper or corrugated cardboard sheet of convenient siz

40、eC1536 183approximately 70 120 cm. The minimum 30 by 20 cm area for each sample.After cured, the brown paper is trimmed away fromthe specimens in order to facilitate measuring the height and width of the bead. bead specimens. The paper shall not be totallyremoved from the foam but only trimmed to th

41、e foams edge for measuring purposes.NOTE 2All polyurethane sealants shall be applied with the substrate laid horizontally on a bench top or other support and allowed to cure for 24 hbefore measurements are taken. Latex sealants will be applied with the substrate in a position that will allow the pro

42、duct to dispense in the upright positionand will be dried for 48 h position specified by the manufacturer and shall be dried and cured for 48 h before measurements are taken.7.5 For each product tested, it is essential to follow the manufacturers label directions and to use the dispenser supplied wi

43、ththe product.8. Conditioning8.1 Condition and test the sealant specimens under all aerosol foam product sample containers at standard laboratory conditions(see(defined 9.8). Conditionin Terminology C717cans) for 24 h at 23 6 2C and 50 6 5 % RH just prior to dispensing.9. Procedure A9.1 Prepare the

44、substrate as described in 7.2 and 7.3.9.2 Remove the overcap, attach the dispensing mechanism and weigh the full assembled cancontainer of foam sealant. Recordas the starting weight (A1) in Table 1.9.3 Shake the cancontainer vigorously for 30 s or as recommended in the products instructions.9.4 Disp

45、ense a full cancontainer of foam sealant into a waste container until completely empty (the can is completely emptywhen gas is primarily being expelled and the product flow rate is less than 2.0 cm or 1.0 g in two continuous seconds). aerosolcontainer is reached. Record the final weight of the canco

46、ntainer (B1) with the dispensing mechanism attached.9.5 With a second full cancontainer of foam sealant repeat 9.1 9.4. Record corresponding values for A2 and B2.9.6 With a third can,container, dispense approximately 13 of the containers contents into a suitable waste container. Weigh andrecord the

47、weight of the cancontainer including the attached dispensing mechanism as (E1). Apply five foam sealant beads 1.02.06 0.2 cm average cured bead diameter by 15 15.0 6 1.5 cm long (since yield will be reported based on the diameter of the curedbead, not initial bead size, the operator shall determine

48、the nominal initial bead size required to produce a specific nominal curedbead diameter) onto the substrate as seen in Fig. A1.1. Some practice is recommended in order to achieve a consistent beaddiameter while dispensing. When one specimen bead is complete, momentarily stop dispensing long enough t

49、o move to the nextbead. After dispensing the five specimens, weigh each canthe container with dispensing mechanism attached and record theweights as (F1).9.7 Repeat step 9.6 for a fourth cancontainer and record corresponding values for E2 and F2.9.8 Allow foam sealant beads to cure 24 h at 23 6 2C and 50 6 5 % RH. Then carefully remove the foam bead specimensfrom the substrate.9.9 Total volume of the cured foam beads is measureddetermined by buoyancy weight (force) measured with a top loadingbalance and container filled