ASTM D6287-17 Standard Practice for Cutting Film and Sheeting Test Specimens.pdf

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1、Designation: D6287 17Standard Practice forCutting Film and Sheeting Test Specimens1This standard is issued under the fixed designation D6287; 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 pa

2、rentheses 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 and

3、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 standar

4、d to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE 1There is no known ISO equivalent to this standard.1.4 This international standard was developed in accor-dance with internationally recognized princip

5、les on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3D882 Test Method for Tensile Prope

6、rties of Thin PlasticSheetingD2838 Test Method for Shrink Tension and OrientationRelease Stress of Plastic Film and Thin Sheeting (With-drawn 2018)4F88 Test Method for Seal Strength of Flexible BarrierMaterialsF1921/F1921M Test Methods for Hot Seal Strength (HotTack) of Thermoplastic Polymers and Bl

7、ends Comprisingthe Sealing Surfaces of Flexible WebsF2029 Practices for Making Laboratory Heat Seals forDetermination of Heat Sealability of Flexible BarrierMaterials as Measured by Seal Strength3. Significance and Use3.1 Many test methods including Test Methods D882,D2838, F88, F1921/F1921M, and F2

8、029 require the use ofnarrow strips of varying length. The quality of the samplepreparation directly affects test results. This practice describesthree techniques for preparing samples with straight, clean,parallel edges with no visible imperfections.NOTE 2After cutting, each specimen should be exam

9、ined visually toinsure the edges are undamaged (free of nicks). 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 TestMetho

10、d D882) of a uniform material may be maintained. Tensile strengthand 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 (

11、0.5 in.) intervals and a blade holder allowing a bladeto ride in each groove or be raised above the groove.4.2 Procedure BA dual blade shear cutter (Fig. 2) withparallelism tolerances within 0.0254 mm (0.001 in.). The cuttercuts individual strips of a particular sample width.4.3 Procedure CDies with

12、 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 pneumatic press and provide easy replacement ofworn cutting elements.4.4 Scissors.

13、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, Sheeting, and MoldedProducts.Current edition approved Dec. 15, 2017. Published January 2018. Originallyapproved in

14、 1998. Last previous edition approved in 2009 as D6287 - 09. DOI:10.1520/D6287-17.2This 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.astm.org, orcontact ASTM Customer Service at se

15、rviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM Inte

16、rnational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,

17、 Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.1.1 Cut film or sheeting to approximately 30 by 30 cm (12by 12 in.) or desired size within these dimensions. It isrecommended to cut only an individual (single) sheet of film.5.1.2 Mark

18、or number all samples as to identity, directionwith respect to material flow, etc.5.1.3 Place sample on work surface in desired 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

19、 the taped sample from the work surface andplace taped edge on the drum of the cutter below the bladeholder allowing the sample to lie across the top of the cutter.NOTE 3Line the sample up precisely to ensure specimens are cut inthe desired direction of material flow.5.1.5 Turn the handle until the

20、sample falls onto cutterdrum. Continue to turn the drum and smooth the sample on thedrum.5.1.6 Tape the free corners of sample 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

21、 lifting the front edge of the bladeholder until a click is heard.5.1.11 Turn drum handle until strips fall away from drum.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 fl

22、ow, etc. It is recommended to cut onlyan individual (single) sheet of film.5.2.2 Slide sample underneath dual blades by movingsample 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.

23、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 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 Shea

24、r CutterD6287 1725.3.2 Examine the cutter blades using a hand magnifier toensure there are no nicks or other defects in the 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 4Polyethy

25、lene or polypropylene sheets or cardboard (two tothree mm in thickness) have been found to be satisfactory.5.3.5 Place the sample 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 (

26、manually or pneumatically) inaccordance with the manufacturers directions.5.3.7 Remove the cut specimen from the die and place it onsheet of paper with proper identification.NOTE 5Although blade life is reported to be very long, the bladesshould be inspected prior to mounting as noted in 5.3.2 or, a

27、s a generalpractice, removed for inspection after every 500 specimens. This intervalmay vary depending on the types of materials 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

28、CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue, D6287 - 09,that may impact the use of this standard. (December 15, 2017)(1) Updated Section 2 and Section 3 with Test MethodsF1921/F1921M, and F2029.(2) Deleted Footnotes 4 through 7 as inform

29、ation related tosole suppliers was no longer relevant.(3) Corrected several typos throughout the standard.(4) Removed reference to scissors in 5.1.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users

30、 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 responsible technical committee and must be reviewed every f

31、ive 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 consideration at a meeting of theresponsible technical

32、 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 Barr Harbor Drive, PO Box C700, West Conshohocken,

33、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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 173