EN ISO 11897-2001 en Packaging - Sacks Made From Thermoplastic Flexible Film - Tear Propagation on Edge Folds《包装 热塑软薄膜制袋 折边撕裂扩展试验 ISO 11897-1999》.pdf

1、BRITISH STANDARD Packaging - Sacks made from thermoplastic flexible film - Tear propagation on edge folds (IS0 11897:1999) The European Standard EN IS0 11897:2001 has the status of a British Standard ICs 55.080 BS EN IS0 11897:2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT L

2、AW BS EN IS0 11897:2001 Amd.No. Date National foreword Comments This British Standard is the official English language version of EN IS0 11897:2001. It is identical to IS0 11897:1999. The UK participation in its preparation was entrusted by Technical Committee PKW/5, Primary and transport packaging,

3、 to Subcommittee PKW/5/26, Packaging made from flexible material, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; m

4、onitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in t

5、his document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of 8 cmtract. User

6、s cf British Stzndurds mv resi;msibh!e fer their cerrect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0

7、title page, page ii, pages 1 to 5, and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authorit

8、y of the Standards Committee and comes into effect on 15 September 2001 CJ BSI 07-2001 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 11 897 June 2001 English version Packaging - Sacks made from thermoplastic flexible film - Tear propagation on edge folds (IS0 1 1897:1999) Emballages - Sac

9、s faits dun film thermoplastique flexible - Propagation de la dchirure sur les plis de bordure (IS0 1 1897: 1999) Verpackung - Scke aus thermoplastischer Kunststofffolie . Weiterreifestigkeit an Falzkanten (IS0 11897:1999) This European Standard was approved by CEN on 11 May 2001. CEN members are bo

10、und to comply with the CENICENELEC 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 national standards may be obtained on application to the

11、Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as

12、the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMEE FOR STANDARDIZATION

13、COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 0 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 11897:2001 E EN IS0 11897:2001 Foreword The text of the

14、 International Standard from Technical Committee ISO/TC 122 “Packaging“ of the International Organization for Standardization (ISO) has been taken over as a European Standard by Technical Committee CEN/TC 261 “Packaging“, the secretariat of which is held by AFNOR. This European Standard shall be giv

15、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2001, and conflicting national standards shall be withdrawn at the latest by December 2001. According to the CENKENELEC Internal Regulations, the national standards organizat

16、ions of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The te

17、xt of the International Standard IS0 11897:1999 has been approved by CEN as a European Standard without any modification. EN IS0 11897:2001 INTERNATIONAL IS0 STANDARD 11 897 First edition 1999-03-01 Packaging - Sacks made from thermoplastic flexible film - Tear propagation on edge folds Emballages -

18、 Sacs faits dun film thermoplastique flexible - Propagation de la dchirure sur les plis de bordure Reference number IS0 11897:1999(E) EN IS0 11897:2001 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The wo

19、rk of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governm

20、ental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (I EC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Dra

21、ft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 1 1897 was prepared by Technical Committee ISOTTC

22、 122, Packaging, Subcommittee SC 2, Sacks. Annex A is for information only. ii EN IS0 11897:2001 Packaging - Sacks made from thermoplastic flexible film - Tear propagation on edge folds 1 Scope This International Standard specifies a method for the determination, under given conditions, of the resis

23、tance to tear propagation on an edge fold of sacks made from thermoplastic flexible film. Measurements on folded and unfolded film permit the determination of the residual resistance in the fold. 2 Normative references The following normative documents contain provisions which, through reference in

24、this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the

25、most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 527-3: 1995, Plastics - Determination of tensile proper

26、ties - Part 3: Test conditions for films and sheets. IS0 2233: 1 994, Packaging - Complete filled transport packages - Conditioning for testing. IS0 4593:1993, Plastics - Films and sheeting - Determination of thickness by mechanical scanning. 3 Terms and definitions For the purposes of this Internat

27、ional Standard, the following terms and definitions apply. 3.1 resistance to tear propagation force that opposes tear propagation in a trapezoidal specimen with an incision and a perforation as shown in Figure 1 3.2 residual resistance percentage calculated by the equation where 1 EN IS0 11897:2001

28、is the resistance to tear propagation on the fold of the film, in newtons; is the resistance to tear propagation on the unfolded film, in newtons. Ffilm 4 Specimens 4.1 Sampling and preparation of the specimens Specimens as shown in Figure 1 shall be taken from the section of film or plastics sack t

29、o be tested such that, in the case of specimens including a fold, the incision coincides with the edge fold; specimens not including a fold shall be cut out directly next to the edge fold, and preferably on both sides of it, so that the incision is parallel to the fold. The specimens shall be cut or

30、 punched so that the edges are smooth and free from notches. A template as shown in annex A is recommended for cutting and marking of the specimens. For the marking as shown in Figure 1, ink or other medium shall be used that does not affect the material under test. a a Dimensions in millimetres a K

31、ey 1 edge fold 2 marks for clamps 3 mark for perforation 4 perforation 5 incision NOTE The transverse mark at the inner end of the incision facilitates perforation of the specimen. Figure 1 - Specimen for determination of resistance to tear propagation on the edge fold 4.2 Number of specimens O When

32、ever possible, five specimens shall be taken for each edge fold and another five for the unfolded specimens. 2 EN IS0 11897:ZOOl 5 Test apparatus 5.1 Tensile-testing machine, in accordance with IS0 527-3, where the clamps shall allow the specimens to be held at the marks (see Figure 1). The clamps s

33、hall span a width of 100 mm. 5.2 Instrument for measuring the thickness of the specimen in accordance with IS0 4593. 6 Laboratory atmosphere The tear propagation test shall be performed in standard condition G temperature (23 f 2) OC, relative humidity (50 f 5) % as specified in IS0 2233: 994. 7 Tes

34、t procedure Condition the specimen for 24 h in the standard laboratory atmosphere (clause 6). Measure the thickness of the specimens, close to the base of the incision, on both sides of the edge fold using the method described in IS0 4593. Fix the specimen in the upper and lower clamps of the tensil

35、e-testing machine. The marks on the specimen shall coincide as accurately as possible with the edges of the clamps. Carry out the tensile test at a test speed of 100 mmmin f 1 O %. Note and record the maximum force attained. 8 Evaluation Calculate the arithmetic mean from the highest values of the f

36、orce in the individual tests (calculate separate means for the folded and unfolded films). For the resistance to tear propagation, calculate the residual resistance from the ratio of the two values obtained, .e. Ffoid / Ffilm x 1 O0 %. O Test report The test report shall include the following inform

37、ation: a reference to this International Standard; nature and identification of the tubular film or the plastics sack tested; date on which the tubular film or sack and the specimens were produced; number of specimens; prior treatment of the specimens and laboratory atmosphere; thickness of the spec

38、imens; resistance to tear propagation of the edge fold resistance to tear propagation of the film Ffil, in newtons; i) residual resistance Ffold / Ffilm x 1 O0 %; O 3 EN IS0 11897:2001 j) any peculiar behaviour on the part of the specimen during the test, e.g. the tear development and pattern of the

39、 a crack; k) any conditions differing from those described in this International Standard; I) date of test. 4 EN IS0 11897:2001 Annex A (informative) Template for preparing the specimens An example of a template used to prepare test specimens is shown in Figure A.l. Dimensions in millimetres I- 137

40、L IW r 7 Figure A.l - Brass template of 2 mm to 3 mm thickness for preparing the specimens 5 BS EN IS0 11897:2001 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on

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