1、Designation: D 6195 03Standard 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 y
2、ear of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover the determination of proper-ties of a pressure-sensitive adhesive. These test methods areapplicable to those adhesives that form a bond of measura
3、blestrength 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 a load equal only to the weight ofthe pressure-sensitive article (for example, tape
4、, 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 units are to be regardedas the standard because the industry standard width forpress
5、ure-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 theresponsibility of the user of this standard to establish appro-priate safety and health
6、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, Plate, and Flat Bar2D 907 Terminology of Adhesives3D 2651 Guide for Preparation of Me
7、tal Surfaces for Adhe-sive Bonding3E 4 Practices for Force Verification of Testing Machines4E 171 Specification for Standard Atmospheres for Condi-tioning and Testing Flexible Barrier Materials5E 177 Practice for Use of the Terms Precision and Bias inASTM Test Methods6E 691 Practice for Conducting a
8、n 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 Institute, Inc. (TLMI)Standard:8L-IB1 TLMI Loop Tack TestL-IB2 Tensile Tester Loop Ta
9、ck 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 adhesive with its backing to be brought into con-trolled contact witha1in.2(25 by 25
10、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 thepressure-sensitive article from the adherend measured by arecording instrument.4.2 Test M
11、ethod 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) applies whena Loop Tack Tester is used to measure loop tack and involvesthe use of a lo
12、op prepared from a 5 in. (125 mm) specimenstrip.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
13、depending on the backing (generally, stiffer backingslead to higher values).1These test methods are under the jurisdiction of ASTM Committee D14 onAdhesives and are the direct responsibility of Subcommittee D14.50 on Hot Melts,Pressure Sensitives, and Archival Adhesives.Current edition approved Apri
14、l 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 of ASTM Standards, Vol 15.09.6Annual Book of AS
15、TM 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 Conshohocken, PA 19428-2959, United States.5.3 Theses
16、 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 FINAT FTM9 “Quick Stick” Tack Measurement Test and the TLMI L-IB2Tensile Tester Loop Tack Test also use a specimen strip of tha
17、tlength.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 otherwise coated, these testmethods incorporate the use of a clear 2 mil (0
18、.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 extension type.6.2 Test Fixture (Fig. 1 or Fig. 29)To be mounted into the
19、jaws 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) contact area of thepressure-sensitive article.6.2.1 The panel or the raise
20、d 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 If a fixed dimension die is unavailable, substitute a1-in. (25-mm) steel b
21、ar 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 entirely virgin raw materials and containing lessthan 0.25 % by weight of
22、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 adhesives.6.7 ReagentsAppropriate reagents include acetone, diac-etone alcohol,
23、 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 pressure-sensitive article. Use of strips of other lengths may changeresu
24、lts. 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 cutting the samples into the 1 by 7 in. (25 by 175 mm) specimenstrips.7.2 Cond
25、ition 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 RoomTest in a standard laboratory atmo-sphere, at 73.4 6 3.6F (23 6 2C) and a re
26、lative 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 Practices E 4.9.2 Set the instrument crosshead speed at 12 in. (300mm)/min.9.3 Pl
27、ace 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 andmaximum gap setting on the extension cycle. Set gaps 1 6 0.05in. (256 1 mm) (cr
28、itical) 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 2 in.(50 mm)/min. Set the chart recorder load scale to 20 lb (90 N)full
29、scale.9.5 Clean the stainless steel portion of the test fixture (thearea the 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 tes
30、t fixture appearsclean. Allow 2 min to elapse after cleaning to ensure completeevaporation of the cleaning solvent. The user must ensure thatthe cleaning method used removes all residue from the test9Available from Chem Instruments, 510 Commercial Drive, Fairfield, OH45014-7593.FIG. 1 Loop Tack Test
31、 Fixture 1FIG. 2 Loop Tack Test Fixture 2D6195032fixture. 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 includes a release liner) from thespecimen.9.7 Bend the specimen completely
32、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). The masking tapecovers the ends of the loop, preventing contamination of t
33、hegrips 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 the tensile tester sothat the crosshead moves downward. The mid-section of t
34、hespecimen 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 minimum position,the specimen loop will completely cover the 1 in. (25 mm) area
35、of 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 remove thespecimen loop from the stainless steel portion of the test fixtur
36、eas 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 threereplicates). Use a fresh specimen strip for each test.9.13 When testing is complete
37、, 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 Tester (Fig. 5)9, also used in TLMI TestL-IB1.10.2 Stainless Steel Test Panels
38、1 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 CutterA 1 by 5 in. (25 by 125 mm) rectangularmallet-type die cutter with mallet for sample preparation.10.3.2 If a fixed dimension die is unavailable, substitute a 1in. (25-mm) s
39、teel 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 from entirely virgin raw materials and containing lessthan 0.25 % by weigh
40、t 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-film adhesives.10.7 ReagentsAppropriate reagents include acetone, diac-et
41、one 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 (when known) of thepressure-sensitive article. Use of strips of other lengt
42、hs mayFIG. 3 Loop Tack Sample During TestFIG. 4 Specimen Loop - Test Method AFIG. 5 Loop Tack TesterD6195033change 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,
43、these areto be laminated to 2 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 %,
44、 in accordance with Specification E 171,prior to conducting the test.12. 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. Procedure13.1 Ensure that the loop tack tester is l
45、eveled 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 loosening thefour clamp screws (Fig. 5(F).13.5 Clean the
46、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 evaporation of the cleaning solvent. The user mustensure that
47、 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 liner (if the pressure-sensitive article normally inc
48、ludes 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 loop together, using astrip of masking tape 0.5 in. (1
49、2.5 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 E 4.13.12 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 again reaches its startingposition.13.12.1 This cycle wi
