1、Designation: D3813/D3813M 98 (Reapproved 2012)1Standard Test Method forCurling, Twisting, and Tubing on Unwind of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D3813/D3813M; the number immediately following the designation indicates theyear of original adoption or, in
2、the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1NOTESection 12
3、 was corrected editorially in May 2012.1. Scope1.1 This test method provides one procedure for determin-ing the extent of curling, the degree of twisting, and tendencyto form a tube resulting from unwinding of the tape from itsroll.1.2 The values stated in either SI or inch-pound units are tobe rega
4、rded separately as standard. The values stated in eachsystem may not be exact equivalents; therefore, each systemmust be used independently, without combining values in anyway.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsib
5、ility 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:2D996 Terminology of Packaging and Distribution Environ-mentsD3715/D3715M Practice for Quality As
6、surance ofPressure-Sensitive TapesD4332 Practice for Conditioning Containers, Packages, orPackaging Components for TestingE122 Practice for Calculating Sample Size to Estimate,With Specified Precision, the Average for a Characteristicof a Lot or Process3. Terminology3.1 DefinitionsGeneral terms used
7、 in this test method aredefined in Terminology D996.4. Summary of Test Method4.1 The sample roll of tape is placed on a free-turningspindle a specified distance above a horizontal plane. A strip oftape is drawn from the roll the distance to the plane at aspecified rate and released. Any subsequent c
8、urling, twisting,or tubing of the strip is observed and measured.5. Significance and Use5.1 This test method will provide information on the relativetendency of tapes to curl, twist, or form into a tube withtouching edges. The amount of each is a predictor of thedifficulty one might experience in ha
9、ndling strips of tape of anylength during their application.5.2 There are several causes for variation in the extent ordegree of these characteristics and may vary themselves withina production lot of tape. Therefore, it is essential to use anaccepted sampling plan (see Section 7) when it is desired
10、 to usethis test method to compare two types of tape for acceptancesampling purposes.6. Apparatus6.1 Free-Turning Spindle,3sized to fit snugly inside thesample tape core, with its axis firmly supported horizontallyand adjustable in height directly above a horizontal platform.There should be no obstr
11、uctions in the path between theplatform and the spindle.NOTE 1The horizontal platform can be a bench top or the floor.7. Sampling7.1 Acceptance SamplingSampling shall be in accordancewith Practice D3715/D3715M.7.2 Sampling for Other PurposesThe sampling and thenumber of test specimens depends on the
12、 purpose of thetesting. Practice E122 is recommended. It is common to test at1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.14 on Tape andLabels.Current edition approved April 1, 2012. Published May 2012. Originallya
13、pproved in 1979. Last previous edition approved in 2007 as D3813/D3813M 98(2007). DOI: 10.1520/D3813_D3813M-98R12E01.2For 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
14、 the standards Document Summary page onthe ASTM website.3The sole source of supply of the apparatus known to the committee at this timeis Chemsultants International, 9349 Hamilton Dr., Mentor, OH 440611118. If youare aware of alternative suppliers, please provide this information to ASTMInternationa
15、l Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.least five specimens of a particular tape. Test
16、 specimens shouldbe taken from several rolls of tape and whenever possible,among several production runs of tape. Strong conclusionsabout a specific property of a tape cannot be based on testresults on a single unit (roll) of a product.8. Test Specimens8.1 The test specimen shall be the strip of tap
17、e unwoundfrom the originally wound sample roll during performance inaccordance with Section 10.8.1.1 No restrictions in the width of the sample (or thespecimen) are made except a practical limitation due to thehigh unwind that might result from wide tape rolls.NOTE 2This test method calls for a spec
18、ific unwind rate which couldbe difficult to meet with high levels of unwind.9. Conditioning9.1 Condition the sample rolls in the standard atmosphere asdescribed in Practice D4332 for a period of at least 24 h. Testat these conditions.NOTE 3For plastic backed tapes when testing for tubing, conditioni
19、ngmay be 4 h and the standard humidity is not necessary. For refereepurposes the standard humidity conditons shall be used.10. Procedure10.1 Place the sample roll on the spindle and adjust itsheight so that the lowest point of the roll is 900 6 3mmor366 0.125 in. above the horizontal platform.10.2 U
20、nwind 50 mm or 2 in. of tape from the roll and foldit over adhesive to adhesive to form a 25-mm or 1-in. tab.10.3 Firmly grasp the tab and pull the tape verticallydownward at a uniform rate of 125 to 175 mm/s or 5 to 7 in./suntil the end of the tab touches the horizontal platform.Immediately release
21、 the tab.10.4 Approximately 30 s after release of the tab make thefollowing determinations:10.4.1 Measure the Curl of the TapeThis is the distancebetween the platform and the lowest portion of the tape.Measure to the nearest 1 mm or132 in.10.4.2 Measure the Twist of the TapeProject an imaginaryline
22、representing the end of the tab onto the horizontalplatform. This is done by sighting past the tab end from aboveit and lining up a pencil on the platform with the end of the tab.Measure the angle between the pencil and a line at right anglesto the edge face of the roll to the nearest 5 of arc. This
23、 isAngleA. Untwist the tape determining the quadrant of rotationneeded to straighten it.10.4.2.1 To find Angle B, the actual twist, use the followingtable:When Rotation Is Then0to90 A = B91 to 180 180 A = B181 to 270 180 + A = B271 to 360 360 A=B361 to 450 360 + A = B451 to 540 540 A=B541 to 630 540
24、 + A=B631 to 720 720 A=B721 to 810 720 + A=B10.4.3 If the tape outer edges touch to form a roll/tube, itshall be a cause for rejection.11. Report11.1 The report shall include the following:11.1.1 Statement that this test method was used. Indicateany deviations from this test method as written,11.1.2
25、 Manufacturers name and designation for the tape,11.1.3 The curling found in 10.4.1 in millimetres or inchesto the nearest 1 mm or132 in.,11.1.4 The twisting found in 10.4.2 to the nearest 5 arc, and11.1.5 Whether the tape, when tested as described in 10.4.3,formed a tube.12. Precision and Bias412.1
26、 Limited information is presented about the precisionand bias of this test method since the test produces pass/failresults.13. Keywords13.1 curling; pressure-sensitive tape; tubing; twisting;unwindingASTM International takes no position respecting the validity of any patent rights asserted in connec
27、tion 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 riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsib
28、le technical committee and must be reviewed every five years andif 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 con
29、sideration 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 your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100
30、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).4Supporting data are available from ASTM Headquarters. Request RR: D-10-1002, Report 2.D3813/D3813M 98 (2012)12
