1、BRITISH STANDARD BS EN ISO 6383-2:2004 Incorporating Amendment No. 1 to BS 2782-3: M e t h o d 3 6 0 A : 1 9 9 1 (renumbers the BS as BS EN ISO 6383-2:2004) Plastics Film and sheeting Determination of tear resistance Part 2: Elmendorf method The European Standard EN ISO 6383-2:2004 has the status of
2、 a British Standard ICS 83.140.10 BS EN ISO 6383-2:2004 This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 29 November 1991 BSI 15 September 2004 The
3、following BSI references relate to the work on this standard: Committee reference PRM/21 Draft for comment 81/55649 DC ISBN 0 580 20149 X Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM
4、/-) to Technical Committee PRM/21, upon which the following bodies were represented: British Plastics Federation British Steel Industry British Telecommunications plc British Textile Confederation Department of the Environment (Building Research Establishment) Department of Trade and Industry (Natio
5、nal Physical Laboratory) EEA (The Association of Electronics, Telecommunications and Business Equipment Industries) Electrical and Electronic Insulation Association (BEAMA Ltd.) Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) GAMBICA (BEAMA Ltd.) Ministry of Defence PIRA Pac
6、kaging and Industrial Films Association Plastic Industrial Containers Association RAPRA Technology Ltd. Yarsley Technical Centre Ltd. The following body was also represented in the drafting of the standard, through subcommittees and panels: Malaysian Rubber Producers Research Association Amendments
7、issued since publication Amd. No. Date Comments 15285 15 September 2004 Implementation of the European StandardBS EN ISO 6383-2:2004 BSI 15 September 2004 i National foreword This method has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is identical with
8、 ISO 6383-2:1983, Plastics Film and sheeting Determination of tear resistance Part 2: Elemendorf method, published by the International Organization for Standardization (ISO). The method is one of three for the determination of tear strength of sheet as follows: Method 360A Elmendorf method (Identic
9、al to ISO 6383-2:1983) Method 360B Trouser tear method (Identical to ISO 6383-1:1983) Method 360C Initiation method Cross-references WARNING NOTE. This British Standard method, which is identical with ISO 6383-2, does not necessarily detail all the precautions necessary to meet the requirements of t
10、he Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the method should be operated only by trained personnel. This publication does not purport to include all the necesssary provisions of a contract. Users are responsible for its correct appl
11、ication. Compliance with a British Standard does not of itself confer immunity from legal obligations. International Standard Corresponding British Standard BS 2782 Methods of testing plastics ISO 291:1977 Part 0:1982 Introduction (Appendix A is identical) ISO 4591:1979 Method 631A:1982 Determinatio
12、n of gravimetric thickness and yield of flexible sheet (Identical) ISO 4593:1979 Method 630A:1982 Determination of thickness by mechanical scanning of flexible sheet (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page
13、s 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 6383-2 July 2004 ICS 83.140.10 English version Plastics Film and sheeting Determination o
14、f tear resistance Part 2: Elmendorf method (ISO 6383-2:1983) Plastiques Film et feuille Dtermination de la rsistance au dchirement Partie 2: Mthode Elmendorf (ISO 6383-2:1983) Kunststoffe Folien und Bahnen Bestimmung der Reifestigkeit Teil 2: Elmendorf-Verfahren (ISO 6383-2:1983) This European Stand
15、ard was approved by CEN 21 June 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such n
16、ational standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official version (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and
17、notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Net
18、herlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 2004 CEN All rights of exploitation
19、 in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 6383-2:2004 EEN ISO 6383-2:2004 BSI 15 September 2004 2 Foreword The text of ISO 6383-2:1983 has been prepared by Technical Committee ISO/TC 61, Plastics, of the International Organization for Standardization
20、(ISO) and has been taken over as EN ISO 6383-2:2004 by Technical Committee CEN/TC 249, Plastics, the Secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 20
21、05, and conflicting national standards shall be withdrawn at the latest by January 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark
22、, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 6383-2:1983 has been approved by CEN as EN
23、 ISO 6383-2:2004 without any modification. NOTE Normative references to International Standards are listed in Annex ZA (normative) Contents Page Foreword 2 Introduction 3 1 Scope and field of application 3 2 References 3 3 Definition 3 4P r i n c i p l e 3 5 Apparatus 3 6 Test specimens 4 7 Conditio
24、ning 4 8 Procedure 4 9 Calculation and expression of results 5 10 Test report 5 Annex A Adjustment and maintenance of the instruments 8 Annex B Calibration of the instrument 9 Annex ZA (normative) Normative references to international publications with their relevant European publications 10 Figure
25、1 Elmendorf tear test apparatus 6 Figure 2 Constant-radius test specimen 6 Figure 3 Rectangular test specimen 7EN ISO 6383-2:2004 BSI 15 September 2004 3 Introduction ISO 6383 consists of the following parts: Part 1: Trouser tear method; Part 2: Elmendorf method. 1 Scope and field of application 1.1
26、 This part of ISO 6383 specifies a method of determining the force required to propagate a tear through a specified distance and from a specified slit, cut in a test specimen of thin flexible plastic sheeting or film, under specified conditions of loading. The upper limit of thickness that can be te
27、sted depends on the tearing force of the material in relation to the capacity of the testing machine. Materials that can be tested according to this method include flexible poly(vinyl chloride) (PVC) and polyolefin films, but variable elongation and oblique tearing effects on the more extensible fil
28、ms may cause poor reproducibility of test results. This method may not be suitable for testing more rigid materials such as rigid PVC, nylon and polyester films. 1.2 The tear resistance test specified by this method is applied to specimens cut from semi-finished and finished products. The test is su
29、itable for the control of production and manufactured products as well as for acceptance or rejection testing under specifications for semi-finished and finished products, provided that it has been demonstrated that the data for a particular material are acceptably reproducible. 1.3 There is no dire
30、ct linear relationship between tearing force and specimen thickness. Data from this method are expressed as tearing force in newtons, with specimen thickness also reported. Only data obtained at the same thickness should be compared because sets of data from specimens of dissimilar thickness are gen
31、erally not comparable. 2 References ISO 291, Plastics Standard atmospheres for conditioning and testing. ISO 4591, Plastics Film and sheeting Determination of average thickness of a sample and average thickness and yield of a roll by gravimetric techniques (gravimetric thickness). ISO 4593, Plastics
32、 Film and sheeting Determination of thickness by mechanical scanning. 3 Definition For the purpose of this part of ISO 6383, the following definition applies. 3.1 tear resistance the force, in newtons, required to tear a test specimen by the specified method 4 Principle A test specimen having a spec
33、ified precut slit is subjected to a tearing force generated by the energy stored in a pendulum of specified dimensions. The energy expended in tearing the specimen is used to calculate the tear resistance of the specimen. 5 Apparatus The test machine shall be of the Elmendorf type (an example of a s
34、uitable test machine is shown diagrammatically in Figure 1), comprising the following. 5.1 Stationary jaw, accurately aligned with a movable jaw carried on a pendulum, preferably formed by a sector of a circle, free to swing on ball bearings or other substantially frictionless bearings. Each jaw sha
35、ll have a clamping surface of not less than 25 mm in the horizontal direction dimension b (see Figure 1) and not less than 15 mm in the vertical direction (dimension c). The thickness of the fixed portion of each jaw shall be between 9 and 13 mm (dimension a). When the pendulum is in the initial pos
36、ition, ready for the EN ISO 6383-2:2004 4 BSI 15 September 2004 test, the jaws shall be separated by a distance of 2,8 0,3 mm and so aligned that the test specimen clamped in them lies in a plane perpendicular to the plane of oscillation of the pendulum, with the edges of the jaws gripping the test
37、specimen in a horizontal line, a perpendicular to which through the axis of suspension of the pendulum (i.e. the distance between the axis and the top edges of the clamping jaws) is 104 2 mm long and makes an angle of 27,530 with the plane of the test specimen. 5.2 Means for holding the pendulum in
38、a raised position and for releasing it without imparting shock. 5.3 Means for determining the energy expended by the pendulum in tearing a specimen. This usually consists of a circumferential scale on the pendulum which indicates against a pointer. The machine shall be accurately calibrated (allowin
39、g for friction and windage losses) to enable the scale reading to be used to give the force required to tear the standard test specimen in newtons, with an accuracy to within 1 %. This calibration shall be periodically checked. Annex A and Annex B give instructions for the adjustment and calibration
40、 of the apparatus. 5.4 Incremental masses, to add to the pendulum to increase the tearing force capacity of the machine. 5.5 Suitable measuring equipment, to measure the thickness of the material being tested by the methods specified in ISO 4591 and ISO 4593. 6 Test specimens 6.1 The test specimen s
41、hall have the shape and dimensions shown in Figure 2 or Figure 3. The preferred or referee specimen shall be the constant-radius specimen (Figure 2) because of better reproducibility (see 8.5). 6.2 The test specimen may be cut from the sample using templates and a sharp knife. Special attention shal
42、l be given to the cutting of the 20 0,5 mm slit, which shall be free of nicks and ragged edges. NOTE Some testing machines have a permanent and integral knife by which the slit can be cut into the test specimen after mounting in the jaws of the machine. In such cases, the sharpness of this knife and
43、 its ability to cut the slit to the correct dimensions should be frequently checked. 6.3 Unless otherwise specified by the specification for the material being tested, five test specimens or five groups of test specimens (see the note) shall be tested in each principal direction of the film sample,
44、cut from positions evenly spaced across the width of the sample. NOTE In the case of films of low tear strength, it is permissible to test a group of two or more test specimens simultaneously in order to meet the requirements of 8.3. Cut the individual test pieces for each group adjacent to each oth
45、er, but space the groups approximately evenly across the width of the sample. However, certain specimens in the same sandwich may tear obliquely in opposite directions, which may lead to falsely high results. When this testing behaviour is encountered, single specimens must be tested even though sca
46、le readings may be in the range below 20. For thin film, it is recommended that single specimens and a lower capacity tester be used rather than several specimens and a higher capacity machine. 6.4 When testing film in the machine (longitudinal) direction, test specimens shall be oriented so that th
47、eir width is cut in the longitudinal direction and, similarly, specimens for transverse tear strength determinations shall be cut with their width in the transverse direction. 7 Conditioning Unless otherwise specified by the specification for the material being tested, test specimens shall be precon
48、ditioned and tested in atmosphere 23/50 as specified in ISO 291, except that when material is known not to be sensitive to humidity, atmosphere 23 may be used. 8 Procedure 8.1 Determine the thickness of the material being tested by the method specified in ISO 4591 and ISO 4593. NOTE ISO 4593 is not
49、suitable for use with embossed film and sheeting. 8.2 Check that the Elmendorf apparatus is level. Lift and arrest the pendulum, set the indicating mechanism to the starting position and gently release the pendulum. Check that the pointer indicates zero and adjust if necessary according to the manufacturers instructions.
