DIN 53363-2003 Testing of plastic films - Tear test using trapezoidal test specimen with incision《塑料薄膜的检验 带凹口的梯形试样的撕裂试验》.pdf

1、 No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).Ref. No. DIN 53363 : 2003-10English price group 6 Sales No. 010602

2、.05Continued on pages 2 to 4.ICS 83.140.10Prfung von Kunststoff-Folien Weiterreiversuch an trapezfrmigen Proben mit EinschnittIn keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.53

3、363Determining the tear resistance of plastic lm and sheeting by the trouser tear methodTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.DEUTSCHE NORM October 2003Supersedes May 1969 edition.ContentsPageForeword . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Normative references. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、 . . . . . . . . . . 23 Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Specimens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Apparatus. . . . . . . . . . . . . . . . . . . .

6、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Test

7、report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Explanatory notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4ForewordThis standard has been prepared by Technical Committee Kunststoff-Folie

8、n und kunststoffbeschichtete Flchengebilde (Kunstleder); allgemeine Eigenschaften of the Normenausschuss Kunststoffe (Plastics Standards Committee).AmendmentsThis standard differs from the May 1969 edition in that it has been editorially revised and references have been updated.Previous editionDIN 5

9、3363: 1969-05.All dimensions are in millimetres.1 ScopeThis standard species a method of determining the tear resistance of a plastic lm under specied con-ditions. It is applicable to products that, because of their exibility, do not tear when clamped between the grips of a tensile testing machine.

10、The method makes it possible to compare samples of different products provided their thickness does not differ by more than 10 %.Page 2DIN 53363 : 2003-102 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These normative references ar

11、e cited at the appropriate places in the text, and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the lates

12、t edition of the publication referred to applies.DIN 51220 General requirements for materials testing machines, including verication and calibra-tionDIN 53370 Determining plastic lm and sheeting thickness by the stylus methodDIN 53515 Determination of tear strength of rubber and plastic lm by Graves

13、 angle testing with cutsDIN EN ISO 291 Plastics Standard atmospheres for conditioning and testing (ISO 291 : 1997)DIN EN ISO 527-1 Plastics Determination of tensile properties Part 1: General principles (ISO 527-1 : 1993 + Corr 1 : 1994)DIN EN ISO 7500-1 Metallic materials Verication of static uniax

14、ial testing machines Part 1: Tension/com-pression testing machines Verication and calibration of the force-measuring system (ISO 7500-1 : 1999)3 ConceptTear resistanceRatio of the force with which a trapezoidal trouser-shaped specimen as shown in gure 1 resists tear, to the specimen thickness.Key1 G

15、rip clamping marks2 IncisionFigure 1: Trouser-shaped specimenPage 3DIN 53363 : 2003-104 Specimens4.1 Sampling and specimen preparationSpecimens as shown in gure 1 shall be cut from the product to be tested. If possible, they shall be taken par-allel and transverse to the manufacturing direction (mac

16、hine direction) of the lm or sheeting so as to permit determination of the tear resistance in both directions as dened by the direction of the incision.NOTE: If only one piece of the product is available and its manufacturing direction cannot be determined, specimens are to be taken in two direction

17、s normal to each other.The cut directions shall be marked.The use of a template as shown in gure 2, made of a cut-resistant material, will make it easier to cut out the specimen and make the incision with a knife or razor blade, and to make the grip clamping marks using a pen-cil, ballpoint pen or g

18、rease pencil.Template thickness: 2 mm to 3 mmFigure 2: Template4.2 Number of specimensA minimum of ve specimens shall be tested. If specimens are to tested in both directions, at least ve shall be taken for each direction. In arbitration cases, at least ten specimens in each direction are to be test

19、ed.5 Apparatus5.1 Tensile testing machine, class 1, as in DIN EN ISO 7500-1, conforming to the requirements of DIN 51220 and tted with a device for gripping the specimen at the marks (see gure 1).5.2 Measuring device, for measuring the specimen thickness as in DIN 53370.6 ProcedureCarry out the tear

20、 test in a 23/50 standard atmosphere as in DIN EN ISO 291.NOTE: In many cases, additional tests performed at lower and higher temperatures are recommended. For this purpose, an environmental test chamber shall be used during testing, capable of maintaining the required temperature to within 0,5 C.Pa

21、ge 4DIN 53363 : 2003-10Determine the thickness of the specimen as specied in DIN 53370 at ve points near the base of the incision and then condition the specimen for 24 hours in the standard atmosphere.Clamp the specimen in the grips of the testing machine, ensuring that the marks coincide with the

22、edges of the grips (see Explanatory notes). Perform the test at a speed of (100 t 10) mm/min (as specied in DIN EN ISO 527-1) and record the maximum force reading.7 EvaluationCalculate separate arithmetic means for the maximum force readings for each set of specimens (machine and transverse directio

23、ns) from the values found in the individual tests and then calculate the tear resistance, in N per mm of mean specimen thickness, as determined in accordance with clause 6.8 Test reportThe report shall refer to this method and include the following details:a) type and details necessary to identify t

24、he product under test;b) thickness of specimens tested;c) tear resistance (single values and mean), in N/mm, reported to three signicant places;d) direction of loading with respect to the machine direction of the product tested, if known;e) any special observations made during loading and specimen c

25、ondition after testing (e.g. tear pattern);f) any deviations from this standard;g) date of testing.Explanatory notesAlthough the test method specied in DIN 53515 can be applied to plastic lm as well as to rubber products, it was deemed necessary to provide in addition the alternative method describe

26、d in the present standard. This test method involves securing the trapezoidal specimen (see gure 1) in the grips of the tensile testing machine at an angle of 2 15 (see gure 3).In the test described in DIN 53515, many types of plastic lm exhibit a high early strength, i.e. tearing actually takes pla

27、ce only when the force has reached a considerably high level, after which the force required for tearing to continue drops to a fraction of its previous magnitude. This phenomenon is not observed when using the specimen specied in the present standard. Here, the material tears at a lower force, which better reects its behaviour in practice.Key1 Upper grip2 Specimen3 Lower gripFigure 3: Specimen shown at start of loading test as in DIN 53363