1、Designation: F 2217 02 (Reapproved 2007)Standard Practice forCoating/Adhesive Weight Determination1This standard is issued under the fixed designation F 2217; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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)
3、. The 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 prac
4、tices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 1898 Practice for Sampling of Plastics3D 4332 Practice for Conditioning Containers, Packages, orPackaging Components for Testing3. Terminology3.1 coatinga material applied to en
5、hance 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 otherthan 278.7 m2(3000 ft2), the conver
6、sion 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 obtainedis
7、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 record the
8、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 cloth, immersin
9、gsamples 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 to clean sa
10、mple 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 sample on the
11、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(in.2),P = f
12、raction 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 3 106mm2/m2(2)4.2.8 When coat weight is expressed in lb/ream:K 5 952.4 Sin.2lbream gD (3)1This practice is under the jurisdiction of ASTM Committ
13、ee F02 on FlexibleBarrier Packaging and is the direct responsibility of Subcommittee F02.20 onPhysical Properties.Current edition approved April 1, 2007. Published May 2007. Originallyapproved in 2002. Last previous edition approved in 2002 as F 2217 02.2For referenced ASTM standards, visit the ASTM
14、 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.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2
15、959, United States.NOTE 4For explanation of how K is determined, see Appendix X1.5. Significance and Use5.1 Coating weight is an indicator of certain functionalcharacteristics of coated substrates (for example, sealability,peelability, appearance). The methodology described in thispractice is a mean
16、s 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 described in this practice includesoperator assessment of effective coating removal. This is asubjective assessment an
17、d 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 critical to the success of the coating removal process.The coated substrate manufacturer must provide guidance incho
18、ice 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 level of accuracy.6.2 SolventThe chemical composition of the coating andthe substrate determine the solvent to use.
19、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 Container, appropriate for holding solvent.6.5 Clean Soft Cloth, Brush, or Other Tool, for removingsoftened coating
20、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 with retractable blade.6.10 Template Die, of known area for cutting standard sizecoated web samples. Template should b
21、e 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 beflammable. Do not allow solvent to touch hot surfaces andensure vapors are vented away. See solvent Material SafetyData
22、 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 withdefects as this can bias results.8.3 See Practice D 1898 for guidance on standard samplingpractices.9. Condition
23、ing9.1 Conditioning of the samples to be tested will dependupon the material under evaluation. Hygroscopic substratessuch as paper should be dried immediately before testing.Typical drying parameters are 5 min at 54 to 60C (130 to140F).9.2 See Practice D 4332 for guidance on standard condition-ing p
24、ractices.10. Report10.1 Apparatus used including degree of precision of ana-lytical balance.10.2 Lot number and source of material, date, time, loca-tion, operator of test, and complete identification of materialsbeing tested.10.3 Any conditioning of the materials.10.4 Any and all deviations from st
25、andard 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 technique forremoval of coating.10.7 Drying time, temperature and method used for drying.11. Keywords11.1 adhesi
26、ve weight; coat weight; flexible package; medi-cal packageAPPENDIX(Nonmandatory Information)X1. Determination of KX1.1 Determination of K when reporting weight measure-ment in g/m2:X1.1.1 The adhesive coat weight is to be reported in g/m2.However the formula W12 W2 /AP will yield units of g/mm2:the
27、weights, W1and W2, are in units of grams, the area is inunits of square millimeters, and the P is unitless. K is used toconvert from units of g/mm2to units of g/m2.K 5S1000 mmmD25 1106mm2m2(X1.1)X1.2 Determination of K when reporting weight measure-ment in lb/ream:X1.2.1 The adhesive coat weight is
28、to be reported inlb/ream. However the formula W12 W2 /AP will yield unitsF 2217 02 (2007)2of g/in.2: the weights, W1and W2, are in units of grams, the areais in units of square inches, and P is unitless. K is used toconvert from units of g/in.2to units of lb/ream. Therefore:K 5 Slb453.59 gDS432 000
29、in.2reamD 5 952.4 in.2lbg ream(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 standard are expressly advised that determination of the validity of any such patent rights, and the ris
30、kof 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 not revised, either reapproved or withdrawn. Your comments are invited either for revision of thi
31、s 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, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake
32、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,United 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).F 2217 02 (2007)3
