1、Designation: D 3813/D 3813M 98 (Reapproved 2007)Standard Test Method forCurling, Twisting, and Tubing on Unwind of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D 3813/D 3813M; the number immediately following the designation indicates theyear of original adoption or,
2、in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1
3、 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 regarded separately as standard. The values stated in
4、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 theresponsibility of the user of this standard to establish ap
5、pro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 996 Terminology of Packaging and Distribution Environ-mentsD 3715/D 3715M Practice for Quality Assurance ofPressure-Sensitive TapesD 4332 Practi
6、ce for Conditioning Containers, Packages, orPackaging Components for TestingE 122 Practice for Calculating Sample Size to Estimate,With a Specified Tolerable Error, the Average for aCharacteristic of a Lot or Process3. Terminology3.1 DefinitionsGeneral terms used in this test method aredefined in Te
7、rminology D 996.4. 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 curling, twisting,or tubing of the st
8、rip 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 handling strips of tape of anylength d
9、uring 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 to usethis test method to compare t
10、wo 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 obstructions in the path between theplatf
11、orm 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 D 3715/D 3715M.7.2 Sampling for Other PurposesThe sampling and thenumber of test specimens depends on the purpose of thetesting. Practice E
12、 122 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 Oct. 1, 2007. Published October 2007. Originallyapproved in 1979. Last previous
13、 edition approved in 2003 as D 3813/ D 3813M 98(2003).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.3The so
14、le 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 ASTMInternational Headquarters. Your comments will receive careful consideratio
15、n 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 specimens shouldbe taken from several rolls of tape and whenev
16、er 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 tape unwoundfrom the originally wound sample roll during performan
17、ce 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 specific unwind rate which couldbe difficult to meet with high leve
18、ls of unwind.9. Conditioning9.1 Condition the sample rolls in the standard atmosphere asdescribed in Practice D 4332 for a period of at least 24 h. Testat these conditions.NOTE 3For plastic backed tapes when testing for tubing, conditioningmay be 4 h and the standard humidity is not necessary. For r
19、efereepurposes 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 Unwind 50 mm or 2 in. of tape from the roll and foldit over adh
20、esive 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 the tab.10.4 Approximately 30 s after release of the tab make
21、 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 representing the end of the tab onto the horizontalplatform. T
22、his 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 isAngleA. Untwist the tape determining the quadrant of rotati
23、onneeded 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 + A=B631 to 720 720 A=B721 to 810 720 + A=B10.4.3 If the tape
24、 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 Manufacturers name and designation for the tape,11.1.3 The cu
25、rling 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 No statement is made about either the precision or biasof thi
26、s test method since the results merely state whether thereis conformance to the criteria for success specified by the userof this test method.13. Keywords13.1 curling; pressure-sensitive tape; tubing; twisting;unwindingASTM International takes no position respecting the validity of any patent rights
27、 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 riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any ti
28、me 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 this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will
29、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 your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM
30、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).4Supporting data are available from ASTM Headquarters. Request RR: D-10-1002, Report 2.D 3813/D 3813M 98 (2007)2
