1、Designation: F2217 02 (Reapproved 2012)Standard Practice forCoating/Adhesive Weight Determination1This standard is issued under the fixed designation F2217; 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 practice covers a procedure for determining theamount of coating applied to a substrate, (for example, film,paper, nonwoven). T
3、he amount of coating is expressed as aweight per given area, (for example, g/m2, lb/ream).1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practic
4、es and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1898 Practice for Sampling of Plastics (Withdrawn 1998)3D4332 Practice for Conditioning Containers, Packages, orPackaging Components for Testing3. Terminology3.1 coatinga material a
5、pplied to enhance the characteris-tics of the base substrates. For this practice, the coating must besoluble in the chosen solvent.3.2 ream500 sheets of 609.6 by 914.4 mm (24 by 36 in.)equal to 278.7 m2(3000 ft2).NOTE 1Other ream sizes may be in use. If using a ream size other than278.7 m2(3000 ft2)
6、, the conversion factor K (located in the appendix)must be recalculated if reporting results as lb/ream.4. Summary of Practice4.1 Representative samples of coated material are weighed,coating is removed using a solvent appropriate for the coating,samples are dried and weighed again. The differential
7、 obtainedis the coating weight.4.2 Typical methodology is as follows:4.2.1 Cut representative samples using a cutting device anda template of known unit area “A” mm2(in.2), for example,203.2 by 50.8 mm (8 by 2 in.) template.4.2.2 Weigh each sample on the analytical balance to thenearest 0.0001 g and
8、 record the value “W1.” Samples may befolded and placed on to the analytical balance.NOTE 2If sample is conditioned weigh immediately.4.2.3 Using solvent in which the coating is soluble and thesubstrate is insoluble, remove coating from substrate. Typicalmethods are wiping with solvent saturated clo
9、th, immersingsamples in solvent to soften, then wiping with cloth or brush,if needed, or immersing sample, agitating to soften, thenwiping with cloth or brush. For specific recommendationscontact the coated substrate supplier.NOTE 3Accumulated coating in solvent, cloth or brush can reduce theability
10、 to clean sample properly and may affect test results.4.2.4 Thoroughly dry the substrate with a drying appliance.A timer should be used to ensure consistency in immersion,cleaning and drying time. Drying of hygroscopic materialsshould be consistent with conditioning parameters.4.2.5 Re-weigh each sa
11、mple on the analytical balance to thenearest 0.0001 g and record the value “W2.”4.2.6 Calculate and report the adhesive coat weight usingthe following equation:Adhesive Coat Weight 5SK W12 W2!APD(1)where:W1= weight of coated substrate, g,W2= weight of uncoated substrate, g,A = area of substrate, mm2
12、(in.2),P = fraction of substrate that is coated (P = 1 except forzone coated materials), andK = constant (see below).4.2.7 When coat weight is expressed in g/m2:K 5 1 3106mm2/m2(2)4.2.8 When coat weight is expressed in lb/ream:K 5 952.4Sin.2lbreamgD(3)NOTE 4For explanation of how K is determined, se
13、e Appendix X1.1This practice is under the jurisdiction of ASTM Committee F02 on FlexibleBarrier Packaging and is the direct responsibility of Subcommittee F02.20 onPhysical Properties.Current edition approved Nov. 1, 2012. Published November 2012. Originallyapproved in 2002. Last previous edition ap
14、proved in 2007 as F2217 02 (2007).DOI: 10.1520/F2217-02R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3T
15、he last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Significance and Use5.1 Coating weight is an indicator of certain functionalcharacteristics of coated
16、 substrates (for example, sealability,peelability, appearance). The methodology described in thispractice is a means of determining coat weight.5.2 This practice does not address acceptability criteria.These need to be jointly determined by the user and producerof the product.5.3 The methodology des
17、cribed in this practice includesoperator assessment of effective coating removal. This is asubjective assessment and requires operator training for con-sistent results.5.4 This practice is applicable to coated substrates in whichonly the coating is soluble in the chosen solvent. The solventused is c
18、ritical to the success of the coating removal process.The coated substrate manufacturer must provide guidance inchoice of solvent.6. Apparatus6.1 Analytical Balance, capable of reading to 0.0001 g isrecommended. Balances of different degrees of precision maybe used if the result meets the required l
19、evel of accuracy.6.2 SolventThe chemical composition of the coating andthe substrate determine the solvent to use. The coating must bereadily soluble in the solvent while the substrate remainsinsoluble. Consult with your supplier for guidance on thesolvent selection.6.3 Fume Hood, is desirable.6.4 C
20、ontainer, appropriate for holding solvent.6.5 Clean Soft Cloth, Brush, or Other Tool, for removingsoftened coating from the substrate surface.6.6 Solvent-resistant Gloves.6.7 Appliance, for drying substrate.6.8 Timer, for reference.6.9 Cutting Device, for example, a safety cutter or utilityknife wit
21、h retractable blade.6.10 Template Die, of known area for cutting standard sizecoated web samples. Template should be part of a regularcalibration check to prevent loss in wear.7. Hazards7.1 Solvents may be toxic. When using solvents, work in afume hood. Wear gloves when handling. Solvents may beflam
22、mable. Do not allow solvent to touch hot surfaces andensure vapors are vented away. See solvent Material SafetyData Sheet for additional information.8. Sampling8.1 The number of samples tested should be adequate to bepredictive of coating weight.8.2 Caution should be taken when eliminating samples w
23、ithdefects as this can bias results.8.3 See Practice D1898 for guidance on standard samplingpractices.9. Conditioning9.1 Conditioning of the samples to be tested will dependupon the material under evaluation. Hygroscopic substratessuch as paper should be dried immediately before testing.Typical dryi
24、ng parameters are 5 min at 54 to 60C (130 to140F).9.2 See Practice D4332 for guidance on standard condition-ing practices.10. Report10.1 Apparatus used including degree of precision of ana-lytical balance.10.2 Lot number and source of material, date, time,location, operator of test, and complete ide
25、ntification of mate-rials being tested.10.3 Any conditioning of the materials.10.4 Any and all deviations from standard methodology.10.5 Number and identification of samples tested and coatweight values. Data may be reported as individual or averagevalues.10.6 Type of solvent used, cleaning time and
26、 technique forremoval of coating.10.7 Drying time, temperature and method used for drying.11. Keywords11.1 adhesive weight; coat weight; flexible package; medi-cal packageF2217 02 (2012)2APPENDIX(Nonmandatory Information)X1. Determination of KX1.1 Determination of K when reporting weight measure-men
27、t in g/m2:X1.1.1 The adhesive coat weight is to be reported in g/m2.However the formulaW12W2APwill yield units of g/mm2: theweights, W1and W2, are in units of grams, the area is in unitsof square millimeters, and the P is unitless. K is used to convertfrom units of g/mm2to units of g/m2.K 5S1000 mmm
28、D25 1106mm2m2(X1.1)X1.2 Determination of K when reporting weight measure-ment in lb/ream:X1.2.1 The adhesive coat weight is to be reported inlb/ream. However the formulaW12W2APwill yield units ofg/in.2: the weights, W1and W2, are in units of grams, the areais in units of square inches, and P is unit
29、less. K is used toconvert from units of g/in.2to units of lb/ream. Therefore:K 5Slb453.59 gDS432000 in.2reamD5 952.4 in.2lbgream(X1.2)ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standa
30、rd are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif
31、 not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, whi
32、ch you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,U
33、nited States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).F2217 02 (2012)3
