1、Designation: D 6287 09Standard Practice forCutting Film and Sheeting Test Specimens1This standard is issued under the fixed designation D 6287; 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
2、parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This practice covers equipment and techniques forcutting film and sheeting specimens for testing.2The speci-mens are nick-free, non-stretched an
3、d can be rapidly prepared.1.2 The values given in SI units are to be consideredstandard. The values given in parentheses are for informationonly.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 stand
4、ard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:3D 882 Test Method for Tensile Properties of Thin PlasticSheetingD 2838
5、Test Method for Shrink Tension and OrientationRelease Stress of Plastic Film and Thin SheetingF88 Test Method for Seal Strength of Flexible BarrierMaterials3. Significance and Use3.1 Many test methods including Test Methods D 882,D 2838, and F88require the use of narrow strips of varyinglength. The
6、quality of the sample preparation directly affectstest results. This practice describes two techniques for prepar-ing samples with straight, clean, parallel edges with no visibleimperfections.NOTE 2After cutting, each specimen should be examined visually toinsure the edges are undamaged (free of nic
7、ks). On a periodic basisspecimen edge quality should be evaluated by microscopic examination.To determine when cutting blades need to be replaced or sharpened, acontrol chart of tensile strength and percent elongation at break (see TestMethod D 882) of a uniform material may be maintained. Tensile s
8、trengthand percent elongation at break will decrease as the quality of specimencutting decreases.4. Apparatus and Materials4.1 Procedure AA hand rotatable drum cutter (Fig. 1)containing a 12.7 cm (5 in.) diameter drum with grooves at12.7 mm (0.5 in.) intervals and a blade holder allowing a bladeto r
9、ide in each groove or be raised above the groove.4,5NOTE 3Plas-Tech in Boston offered a rotary drum cutter in the 1950sand 1960s which was shown to be an excellent instrument with respect toyielding nick free non-stretched film specimen(s) at high rates.6However,Plas-Tech disappeared in the late 196
10、0s and the cutter with them. Thistype of cutter has been redesigned to meet current government regulationsand retain its original desirable characteristics plus additional improve-ments.4.2 Procedure BA dual blade shear cutter (Fig. 2) withparallelism tolerances within 0.0254 mm (0.001 in.). The cut
11、tercuts individual strips of a particular sample width.4.3 Procedure CDies with replacable razor-blade cuttersare available in many different specimen configurations. Thedies are equipped with a spring-loaded mechanism that allowseasy specimen removal. These dies are mounted on either amanual or pne
12、umatic press and provide easy replacement ofworn cutting elements.7,54.4 Scissors.4.5 Marker.4.6 Tape.5. Procedure5.1 Procedure A:1This practice is under the jurisdiction ofASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.19 on Film and Sheeting.Current edition appr
13、oved Sept. 1, 2009. Published September 2009. Originallyapproved in 1998. Last previous edition approved in 2005 as D 6287 - 05.2This practice does not cover all types of techniques which may be used forcutting film and sheeting specimens.3For referenced ASTM standards, visit the ASTM website, www.a
14、stm.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.4The sole source of supply of the rotary drum film and sheeting cutter known tothe committee at this time is Zebedee Corpo
15、ration, P.O. Box 395, Landrum, SC29356.5If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful consider-ation at a meeting of the responsible technical committee1, which you may attend.6Patterson, Gordon D., “A
16、n Interlaboratory Study of Cutting Plastic FilmTension Specimens,” Materials Research and Standards, April 1964, p. 159.7The sole source of supply of the razor-blade cutters and associated equipmentknown to the committee at this time is the Dumbbell Co., Ltd, 2243-1 KasahataKawagoe-Shi, Saitama, 350
17、-1175 Japan, represented by Ontario Die International,235 Gage Avenue, Kitchener, ON, N2M 2C9.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.1.1 Cut film or sheetin
18、g (with scissors) approximately 30by 30 cm (12 by 12 in.) or desired size within these dimen-sions. It is recommended to cut only an individual (single)sheet of film.5.1.2 Mark or number all samples as to identity, directionwith respect to material flow, etc.5.1.3 Place sample on work surface in des
19、ired direction andplace a strip of tape on the sample edge with half the width ofthe tape overlapping the edge to enable the tape to adhere to thedrum of the cutter.5.1.4 Remove the taped sample from the work surface andplace taped edge on the drum of the cutter below the bladeholder allowing the sa
20、mple to lie across the top of the cutter.NOTE 4Line the sample up precisely to ensure specimens are cut inthe desired direction of material flow.5.1.5 Turn the handle until the sample falls onto cutterdrum. Continue to turn the drum and smooth the sample on thedrum.5.1.6 Tape the free corners of sam
21、ple if necessary.5.1.7 Align tape with cutter blades.5.1.8 Pull blade knob to drop blades just in front of tape.5.1.9 Rotate the drum with the drum handle.5.1.10 Raise blades by lifting the front edge of the bladeholder until a click is heard.5.1.11 Turn drum handle until strips fall away from drum.
22、5.1.12 Remove strips and place on sheets of paper withproper identification.5.2 Procedure B:5.2.1 Mark or number all samples as to identity, directionwith respect to material flow, etc. It is recommended to cut onlyan individual (single) sheet of film.5.2.2 Slide sample underneath dual blades by mov
23、ingsample on support platforms until aligned perpendicular toguide bar.5.2.3 Using a firm downward motion press the cutter handledown.5.2.4 Slowly release the cutter handle.5.2.5 Remove strip and place on sheet of paper with properidentification.5.3 Procedure C:5.3.1 Mark or number all samples as to
24、 identity, directionwith respect to material flow, etc. It is recommended to cut onlyan individual (single) sheet of film.FIG. 1 Hand Rotatable Drum CutterFIG. 2 Dual Blade Shear CutterD62870925.3.2 Examine the cutter blades using a hand magnifier toensure there are no nicks or other defects in the
25、blades.5.3.3 Install the appropriate cutter in the unit in accordancewith the manufacturers instructions.5.3.4 Place a flat back-up sheet on the cutting platform.NOTE 5Polyethylene or polypropylene sheets or cardboard (two tothree mm in thickness) have been found to be satisfactory.5.3.5 Place the s
26、ample on the covered cutting platformensuring that there are no creases. If necessary, the edges canbe taped to the platform to keep the sample flat.5.3.6 Activate the cutter (manually or pneumatically) inaccordance with the manufacturers directions.5.3.7 Remove the cut specimen from the die and pla
27、ce it onsheet of paper with proper identification.NOTE 6Although blade life is reported to be very long, the bladesshould be inspected prior to mounting as noted in 5.3.2 or, as a generalpractice, removed for inspection after every 500 specimens. This intervalmay vary depending on the types of mater
28、ials being cut and users areurged to perform inspections more frequently at first to monitor wear(Reference Note 2).6. Keywords6.1 film; sample preparation; sheetingSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue,D 6287 - 05, that
29、 may impact the use of this standard. (September 1, 2009)(1) Corrected ISO equivalency statement. (2) Added Procedure “C” for razor dies.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this sta
30、ndard 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 responsible technical committee and must be reviewed every five years an
31、dif 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 consideration at a meeting of theresponsible technical committee,
32、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 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).D6287093
