ASTM D6195-2003e1 695 Standard Test Methods for Loop Tack《环形黏着力的标准试验方法》.pdf

1、Designation: D 6195 03e1Standard Test Methods forLoop Tack1This standard is issued under the fixed designation D 6195; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the

2、 year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.e1NOTECorrected research report reference in Section 16 editorially in March 2008.1. Scope1.1 These test methods cover the determination of proper-ties of a pressure-sensitive adhes

3、ive. These test methods areapplicable to those adhesives that form a bond of measurablestrength rapidly upon contact with another surface. Tack forcemay be measured as the force required to separate the adhesivefrom the adherend at the interface shortly after they have beenbrought into contact under

4、 a load equal only to the weight ofthe pressure-sensitive article (for example, tape, label, sticker,etc.) ona1in.2contact area.1.2 The following test methods are included:1.2.1 Test Method A (using Tensile Tester), and1.2.2 Test Method B (using Loop Tack Tester).1.3 The values stated in inch-pound

5、units are to be regardedas the standard because the industry standard width forpressure-sensitive tape is 1 inch. The values given in paren-theses are for information purposes only.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresp

6、onsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:A 666 Specification for Annealed or Cold-Worked Austen-itic Stainless Steel, Sheet, Strip, P

7、late, and Flat Bar2D 907 Terminology of Adhesives3D 2651 Guide for Preparation of Metal Surfaces for Adhe-sive Bonding3E4 Practices for Force Verification of Testing Machines4E 171 Specification for Standard Atmospheres for Condi-tioning and Testing Flexible Barrier Materials5E 177 Practice for Use

8、of the Terms Precision and Bias inASTM Test Methods6E 691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method62.2 European Association for the Pre-Adhesed LabelingIndustry (FINAT) Standard:7FTM 9 “Quick-Stick” Tack Measurement2.3 Tag and Label Manufacturers In

9、stitute, Inc. (TLMI)Standard:8L-IB1 TLMI Loop Tack TestL-IB2 Tensile Tester Loop Tack Test3. Terminology3.1 Definitions:3.1.1 Many of the terms found in these test methods aredefined in Terminology D 907.4. Summary of Test Method4.1 These test methods involve allowing a loop of pressure-sensitive ad

10、hesive with its backing to be brought into con-trolled contact witha1in.2(25 by 25 mm) surface of stainlesssteel, with the only force applied being the weight of thepressure-sensitive article itself. The pressure-sensitive article isthen removed from the substrate, with the force to remove thepressu

11、re-sensitive article from the adherend measured by arecording instrument.4.2 Test Method A (using a Tensile Tester) applies when aTensile Tester is used to measure loop tack and involves the useof a loop prepared from an 7 in. (175 mm) specimen strip.4.3 Test Method B (using a Loop Tack Tester) appl

12、ies whena Loop Tack Tester is used to measure loop tack and involvesthe use of a loop prepared from a 5 in. (125 mm) specimenstrip.1These test methods are under the jurisdiction of ASTM Committee D14 onAdhesives and are the direct responsibility of Subcommittee D14.50 on Hot MeltPressure Sensitive A

13、rchive Adhesives.Current edition approved April 10, 2003. Published May 2003. Originallyapproved in 1997. Last previous edition approved in 1997 as D 6195 - 97.2Annual Book of ASTM Standards, Vol 01.03.3Annual Book of ASTM Standards, Vol 15.06.4Annual Book of ASTM Standards, Vol 03.01.5Annual Book o

14、f ASTM Standards, Vol 15.09.6Annual Book of ASTM Standards, Vol 14.02.7Available from FINAT, Laan Copes Van Cattenburch 79, 2585 EW, The Hague,Holland.8Available from TLMI, 40 Shuman Blvd., Ste. 295, Naperville, IL 60563.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoh

15、ocken, PA 19428-2959, United States.5. Significance and Use5.1 These test methods provide a quantitative measure ofthe pressure-sensitive tack property of an adhesive.5.2 These test methods are designed to measure the tackproperty of the adhesive mass. The tack of a given adhesivevaries depending on

16、 the backing (generally, stiffer backingslead to higher values).5.3 Theses test methods are suitable for quality control andresearch purposes.5.4 Test Method A (using Tensile Tester) makes use of aspecimen strip 7 in. (175 mm) in length. Both the FINATFTM 9 “Quick Stick” Tack Measurement Test and th

17、e TLMIL-IB2 Tensile Tester Loop Tack Test also use a specimen stripof that length.5.5 Test Method B (using Loop Tack Tester) makes use of aspecimen strip five in. (125 mm) in length. That is the onlylength specimen strip that fits properly in the loop tack tester.5.6 If the adhesive is not already o

18、therwise coated, these testmethods incorporate the use of a clear 2 mil (0.05 mm)polyester (PET) film backing for specimen preparation. Use ofother backing materials changes performance of the specimento be tested.TEST METHOD A (Using a Tensile Tester)6. Apparatus6.1 Tensile TesterA constant rate of

19、 extension type.6.2 Test Fixture (Fig. 1 or Fig. 29)To be mounted into thejaws of the tensile tester. A panel held by the test fixture allowsfor a 1 in.2(25 by 25 mm) contact area of the pressure-sensitivearticle. Alternately, the test fixture may include a raised areathat allowsa1in.2(25 by 25 mm)

20、contact area of thepressure-sensitive article.6.2.1 The panel or the raised area of the test fixture isstainless steel as specified in Specification A 666.6.3 Apparatus for Cutting:6.3.1 Die CutterA 1 by 7 in. (25 by 175 mm) rectangularmallet-type die cutter with mallet for sample preparation.6.3.2

21、If a fixed dimension die is unavailable, substitute a1-in. (25-mm) steel bar with a double razor knife or otherapparatus suitable for cutting the specimen into the specifieddimensions to prepare the 1 in. (25 mm) wide specimen strips.6.4 Absorbent Lint-Free Cleaning MaterialMaterials pro-duced from

22、entirely virgin raw materials and containing lessthan 0.25 % by weight of solvent-leechable materials.6.5 Masking Tape1 in. (25 mm) wide.6.6 2 mil (0.05 mm) PET FilmTo be used as a supportmedium in evaluating unsupported adhesives such as transfertapes, laminating adhesives, or other free-film adhes

23、ives.6.7 ReagentsAppropriate reagents include acetone, diac-etone alcohol, n-heptane and toluene, reagent or analyticalgrade, or an ethanol cleaner for water-based adhesives.7. Sample Preparation7.1 Cut sample into 1 by 7 in. (25 by 175 mm) specimenstrips in the machine direction (when known) of the

24、 pressure-sensitive article. Use of strips of other lengths may changeresults. Cut at least three specimen strips for each adhesive tobe tested.NOTE 1If transfer or unsupported adhesives are to be tested, these areto be laminated to 2 mil (0.05 mm) PET film, used as an adhesive support,prior to cutt

25、ing the samples into the 1 by 7 in. (25 by 175 mm) specimenstrips.7.2 Condition specimens to be tested for at least 24 h in atesting room at 73.4 6 3.6F (23 6 2C) and a relativehumidity of 50 6 5 %, in accordance with Specification E 171,prior to conducting the test.8. Conditioning8.1 Testing RoomTe

26、st in a standard laboratory atmo-sphere, at 73.4 6 3.6F (23 6 2C) and a relative humidity of50 6 5 %, in accordance with Specification E 171.9. Procedure9.1 Ensure that the tensile tester is calibrated according toinstructions supplied by the manufacturer and conforming tothe requirements of Practic

27、es E4.9.2 Set the instrument crosshead speed at 12 in. (300mm)/min.9.3 Place the test fixture in the lower grip of the tensiletester. It is important that the test fixture be level and straightin the lower grip. See Fig. 1, Fig. 2 and Fig. 3.9.4 Set gaps for the crosshead using the minimum andmaximu

28、m gap setting on the extension cycle. Set gaps 1 6 0.05in. (256 1 mm) (critical) and 4 6 0.1 in. (100 6 3 mm)(optional) from the bottom of the upper grips to the face of thestainless steel portion of the test fixture when the test fixture islocked in the lower grips. Set the chart recorder speed for

29、 2 in.(50 mm)/min. Set the chart recorder load scale to 20 lb (90 N)full scale.9Available from Chem Instruments, 510 Commercial Drive, Fairfield, OH45014-7593.FIG. 1 Loop Tack Test Fixture 1FIG. 2 Loop Tack Test Fixture 2D619503e129.5 Clean the stainless steel portion of the test fixture (thearea th

30、e pressure-sensitive article will contact) prior to useusing reagent(s) from 6.7. Use absorbent, lint-free cleaningmaterial. Use a separate piece of cleaning material each time.Repeat for a total of three washes after the test fixture appearsclean. Allow 2 min to elapse after cleaning to ensure comp

31、leteevaporation of the cleaning solvent. The user must ensure thatthe cleaning method used removes all residue from the testfixture. The water-break test, described in Guide D 2651, maybe used to verify cleanliness.9.6 Completely remove the release liner (if the pressure-sensitive article normally i

32、ncludes a release liner) from thespecimen.9.7 Bend the specimen completely back on itself, beingcareful not to crease it. The specimen forms a tear drop shapedloop with the adhesive surface facing out.9.8 Fasten the ends of the loop together, using a strip ofmasking tape 1 in. (25 mm) wide (Fig. 4).

33、 The masking tapecovers the ends of the loop, preventing contamination of thegrips of the tensile tester.9.9 Insert the taped end of the specimen loop into the uppergrips so that the bottom edge of the masking tape is even withthe bottom edges of the grips.9.10 Turn on the chart recorder.Activate th

34、e tensile tester sothat the crosshead moves downward. The mid-section of thespecimen loop must contact the center of the stainless steelportion of the test fixture. When the crosshead reaches itsminimum position, it will immediately switch direction andmove upward. When the crosshead is at its minim

35、um position,the specimen loop will completely cover the 1 in. (25 mm) areaof the stainless steel portion of the test fixture withoutexcessive “hang-over” of the edges.NOTE 2If the tensile tester does not have automatic cycling, cyclingmust be done manually.9.11 Record the maximum force required to r

36、emove thespecimen loop from the stainless steel portion of the test fixtureas well as the mode of failure.9.11.1 Record the failure mode as adhesion, cohesion ortransfer.9.12 Repeat procedure (9.5 to 9.11.1) at least two additionaltimes for each adhesive to be tested (for a minimum of threereplicate

37、s). Use a fresh specimen strip for each test.9.13 When testing is complete, clean the stainless steelportion of the test fixture with approved reagent. Cover withmasking tape when not in use to protect the surface fromscratches.TEST METHOD B (Using a Loop Tack Tester)10. Apparatus10.1 Loop Tack Test

38、er (Fig. 5)9, also used in TLMI TestL-IB1.10.2 Stainless Steel Test Panels1 in. (25 mm) by 6 in.(150 mm), stainless steel as specified in Specification A 666.10.3 Apparatus for Cutting.10.3.1 Die CutterA1 by 5 in. (25 by 125 mm) rectangularmallet-type die cutter with mallet for sample preparation.10

39、.3.2 If a fixed dimension die is unavailable, substitute a 1in. (25-mm) steel bar with a double razor knife or otherapparatus suitable for cutting the specimen into the specifieddimensions to prepare the 1 in. (25 mm) wide specimen strips.10.4 Absorbent Lint-Free Cleaning MaterialMaterialsproduced f

40、rom entirely virgin raw materials and containing lessthan 0.25 % by weight of solvent-leechable materials.10.5 Masking Tape0.5 in. (12.5 mm) wide.10.6 2 mil (0.05 mm) PET FilmTo be used as a supportmedium in evaluating unsupported adhesives such as transfertapes, laminating adhesives, or other free-

41、film adhesives.10.7 ReagentsAppropriate reagents include acetone, diac-etone alcohol, n-heptane and toluene, reagent or analyticalgrade, or an ethanol cleaner for water-based adhesives.11. Sample Preparation11.1 Cut the sample into 1 by 5 in. (25 by 125 mm)specimen strips in the machine direction (w

42、hen known) of thepressure-sensitive article. Use of strips of other lengths maychange results and will not fit properly in the loop tack tester.Cut at least three specimen strips for each adhesive to be tested.NOTE 3If transfer or unsupported adhesives are to be tested, these areto be laminated to 2

43、 mil (0.05 mm) PET film, used as an adhesive support,prior to cutting the samples into the 1 by 5 in. (25 by 125 mm) specimenstrips.11.2 Condition the specimens to be tested for at least 24 h inthe testing room at 73.4 6 3.6F (23 6 2C) and a relativehumidity of 50 6 5 %, in accordance with Specifica

44、tion E 171,prior to conducting the test.FIG. 3 Loop Tack Sample During TestFIG. 4 Specimen Loop - Test Method AD619503e1312. Conditioning12.1 Testing RoomTest in a standard laboratory atmo-sphere, at 74.3 6 3.6F (23 6 2C) and a relative humidity of50 6 5 %, in accordance with Specification E 171.13.

45、 Procedure13.1 Ensure that the loop tack tester is leveled and con-nected to electrical power. Release the upper assembly lockinglever (Fig. 5(B).13.2 Turn the power switch (Fig. 5(E) to “ON.”13.3 Ensure that the grip is in its upward-most position.13.4 Remove the stainless steel test panel by loose

46、ning thefour clamp screws (Fig. 5(F).13.5 Clean the stainless steel panel prior to use usingreagent(s) from 10.7. Use a separate piece of cleaning materialeach time. Repeat for a total of three washes after the test panelappears clean. Allow 2 min to elapse after cleaning to ensurecomplete evaporati

47、on of the cleaning solvent. The user mustensure that the cleaning method used removes all residue fromthe test fixture. The water-break test, described in GuideD 2651, may be used to verify cleanliness.13.6 Reinsert the test panel and tighten the four clampscrews.13.7 Completely remove the release l

48、iner (if the pressure-sensitive article normally includes a release liner) from thespecimen.13.8 Bend the specimen completely back on itself, beingcareful not to crease it. The specimen forms a tear drop shapedloop with the adhesive surface facing out (Fig. 6).13.9 Fasten the ends of the specimen lo

49、op together, using astrip of masking tape 0.5 in. (12.5 mm) wide.13.10 Insert the specimen loop into the specimen jaw untilit touches the guide pins near the center of the jaw. Insertingthe specimen loop in this way ensures that it is positionedproperly.13.11 Zero the force gage according to instructions providedby the manufacturer and Practices E4.13.12 Press the “Start” button (Fig. 5(I) and keep itdepressed until the upper assembly starts to move downward.The upper assembly will complete one full cycle and automati-cally shut off when the force gage agai