1、May 2011 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without 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).ICS 85
2、.080.30!$pNL“1774341www.din.deDDIN EN ISO 7263Corrugating medium Determination of the flat crush resistance after laboratory fluting(ISO 7263:2011)English translation of DIN EN ISO 7263:2011-05Wellenrohpapier Bestimmung des Flachstauchwiderstandes an labormig gewelltem Wellenpapier(ISO 7263:2011)Eng
3、lische bersetzung von DIN EN ISO 7263:2011-05Papier cannelure pour carton ondul Dtermination de la rsistance la compression plat aprs cannelage en laboratoire(ISO 7263:2011)Traduction anglaise de DIN EN ISO 7263:2011-05SupersedesDIN EN ISO 7263:2009-05www.beuth.deDocument comprises pagesIn case of d
4、oubt, the German-language original shall be considered authoritative.1404.11 DIN EN ISO 7263:2011-05 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps” in collaboration with Technical Committee CEN/TC 172
5、“Pulp, paper and board” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Papier und Pappe (Paper and Board Standards Committee), Working Committee NA 074-02-03 AA Physikalisch-technische Prfverfahren fr Papier und Pappe. The DIN Standards c
6、orresponding to the International Standards referred to in clause 2 of this document are as follows: ISO 186 DIN EN ISO 186 ISO 187 DIN EN 20187 ISO 536 DIN EN ISO 536 Amendments This standard differs from DIN EN ISO 7263:2009-05 as follows: a) the definition of the term “flat crush resistance index
7、” has been included; b) the calculation of the flat crush resistance index has been included, see 10.2; c) (German version only) in Subclause 5.3.1, the tooth spacing has been corrected to read 8,55 mm (instead of 8,50 mm). Previous editions DIN 53143: 1968-08, 1974-02, 1974-04, 1977-12, 1984-06 DIN
8、 EN ISO 7263: 1995-04, 2009-05 National Annex NA (informative) Bibliography DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 536, Paper and board Determination of grammage DIN EN 20187, Paper, board and pulps Standard atmosphere for conditioning and testing and proced
9、ure for monitoring the atmosphere and conditioning of samples 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7263 February 2011 ICS 85.060 Supersedes EN ISO 7263:2008English Version Corrugating medium Determination of the flat crush resistance after laboratory fluting (ISO 7263:2011) Pap
10、ier cannelure pour carton ondul Dtermination de la rsistance la compression plat aprs cannelage en laboratoire (ISO 7263:2011) Wellenrohpapier Bestimmung des Flachstauchwiderstandes an labormig gewelltem Wellenpapier (ISO 7263:2011) This European Standard was approved by CEN on 14 February 2011. CEN
11、 members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on appli
12、cation to the CEN-CENELEC 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 CEN-CENELEC Man
13、agement Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nether
14、lands, Norway, Poland,Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in
15、 any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7263:2011: EContents Page Foreword 3 Introduction.4 1 Scope5 2 Normative references5 3 Terms and definitions .5 4 Principle .5 5 Apparatus.6 6 Sampling 8 7 Conditioning 8 8 Preparation of test pieces.8 9 Procedur
16、e.8 9.1 General .8 9.2 Testing immediately after fluting .8 9.3 Testing after 30 min of reconditioning9 9.4 Fluting and testing 9 10 Expression of results9 10.1 Flat crush resistance.9 10.2 Flat crush resistance index 10 11 Precision 10 12 Test report10 Annex A (informative) Maintenance of fluting r
17、olls (horizontal type)11 Bibliography12 2EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 Foreword This document (EN ISO 7263:2011) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps“ in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of w
18、hich is held by DIN. 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 August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the poss
19、ibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 7263:2008. According to the CEN/CENELEC Internal Regulations, the national standards
20、 organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Polan
21、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7263:2011 has been approved by CEN as a EN ISO 7263:2011 without any modification. 3EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 Introduction The flat crush resistance of l
22、aboratory-fluted corrugating medium is regarded as an important property because it is an indication of the potential flat crush resistance of corrugated fibreboard made from that medium. The corrugated medium is fluted by passing it between heated rollers. Two different test procedures are then wid
23、ely used: a) the fluted corrugating medium is compressed immediately after fluting (i.e. 5 s to 8 s after fluting); b) the fluted corrugating medium is conditioned for 30 min to 35 min under standard laboratory test conditions before being compressed. Procedure a) generally gives considerably higher
24、 results than those obtained with procedure b). The differences in results are claimed to be caused by the lower moisture content (and thus higher stiffness) of the unconditioned fluted corrugating medium, and/or the change in flute profile which occurs during the conditioning period. Since consider
25、able advantages are claimed for both procedures and both are widely used, this International Standard describes both procedures. A method of determining the flat crush resistance of manufactured corrugated fibreboard is given in ISO 30351. 4EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 1 Scope This I
26、nternational Standard specifies two methods for the determination of the flat crush resistance of a corrugating medium after laboratory fluting. The procedures are applicable to any corrugating medium intended to be used, after fluting, in the manufacture of corrugated board. 2 Normative references
27、The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 186, Paper and board Sampling to determine av
28、erage quality ISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples ISO 536, Paper and board Determination of grammage ISO 13820, Paper, board and corrugated fibreboard Description and calibration of c
29、ompression-testing equipment 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 flat crush resistance maximum force that a corrugated test piece will withstand before the flutes collapse under an increasing force applied perpendicular to its sur
30、face NOTE Flat crush resistance is expressed in newtons. 3.2 flat crush resistance index flat crush resistance divided by the grammage NOTE The result is expressed in newton square metres per gram (Nm2/g). 4 Principle Fluting of the corrugating medium by passing it between heated rollers, and its fo
31、rmation into single-faced corrugated board using pressure-sensitive adhesive tape as the facing. Application of a crushing force, in the direction perpendicular to the plane of the flutes, and determination of the flat crush resistance. 5EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 5 Apparatus 5.1 C
32、utting device, for cutting the test pieces to the dimensions required. 5.2 Fluter, consisting of a pair of matched steel corrugating rolls. The roll temperature shall be maintained at 175 C 8 C. The temperature is controlled by any suitable method. Check the temperature when the rolls are in motion.
33、 One roll is motor-driven at 4,5 r/min 1,0 r/min and the rolls are held in mesh by a force of 100 N 10 N exerted between the rolls and distributed evenly across the teeth, under test conditions. In some instruments, the force between the rolls is applied by a spring acting in a slide. In such instru
34、ments, friction in this device can result in the force which acts upon the test piece being considerably less than the force required to displace the rolls initially. When verifying that an instrument conforms to the requirements given in this subclause, it is therefore necessary to measure the forc
35、e required to just prevent the undriven roll from moving towards the driven roll, from a position about 200 m away. The essential characteristics of each roll are the following (see also Figure 1): Roll diameter 228,5 mm 0,5 mm Roll face width 16 mm 1 mm Number of teeth 84 (see Note below) Radius of
36、 teeth at peak 1,5 mm 0,1 mm Radius of teeth at base 2,0 mm 0,1 mm Depth of teeth 4,75 mm 0,05 mm Distance between teeth (peak-to-peak around the arc) 8,55 mm 0,05 mm In order to optimize the matching of pairs of rolls, pairs of rolls should be selected in which the differences in dimensions between
37、 the two are substantially less than the tolerances shown. A difference of 0,1 mm or better is recommended. Prior to first use, the rolls should be run at the operating temperature for about 6 h with a mild abrasive on the teeth. The two rolls should then be marked in some way so that, after removal
38、 for cleaning or maintenance, they can be reassembled with exactly the same teeth in mesh. NOTE In some fluters, a full roll is not used. Dimensions in millimetres Figure 1 Profile of corrugating rolls 6EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 5.3 Rack and comb. 5.3.1 Rack, at least 19 mm wide w
39、ith a profile corresponding to the teeth of the corrugating rolls. The rack has nine full teeth and one incomplete tooth at each end so as to form 10 valleys. The tooth spacing is 8,55 mm 0,05 mm and the height of the teeth is 4,75 mm 0,05 mm. (See 2 in Figures 2 and 3.) 5.3.2 Comb, at least 19 mm w
40、ide with 10 prongs, 3,4 mm 0,1 mm high. (See 1 in Figures 2 and 3.) The rack (5.3.1) and comb may be replaced with an automatic device, provided it can be demonstrated that this device will produce the same results. Key 1 comb 2 rack Figure 2 Profile of comb and rack Dimensions in millimetres Key 1
41、comb 2 rack 3 paper Figure 3 Dimensions of comb and rack 7EN ISO 7263:2011 (E) DIN EN ISO 7263:2011-05 5.4 Pressure-sensitive adhesive tap, for example 3M grade 410 tape1), at least 15 mm wide. The tape shall be of low stretch and have good adhesion properties and it shall not transfer moisture to t
42、he substrate during the test. 5.5 Flat crush tester, motor-driven, fixed-platen type in accordance with ISO 13820. 6 Sampling If the tests are being made to evaluate a lot, the sample shall be selected in accordance with ISO 186. If the tests are made on another type of sample, make sure that the sp
43、ecimens taken are representative of the sample received. 7 Conditioning When using the reconditioning procedure (see 9.3), before preparation of the test pieces, condition the sample for at least 4 h in one of the conditioning atmospheres specified in ISO 187. 8 Preparation of test pieces If the fla
44、t crush resistance index is required, determine the grammage of the conditioned specimens (before the preparation of test pieces) as described in ISO 536. Cut at least 10 test pieces having a width of 12,7 mm 0,1 mm and a length between 150 mm and 160 mm, the length being cut in the machine directio
45、n. Care should be taken not to damage the edges of the test pieces and they should not be handled more than is necessary. A test piece width of 15,0 mm 0,1 mm may be used, provided that the corrugating roll width is greater than the test piece width. If a test width of 15 mm is used, the force betwe
46、en the corrugating rolls, as defined in 5.2, is to be adjusted to 118 N 10 N. The use of a 15 mm test piece width is not to be considered as being in accordance with this International Standard and its use is to be stated in the test report. 9 Procedure 9.1 General The compression test may be carrie
47、d out immediately after fluting (see 9.2) or after reconditioning (see 9.3). 9.2 Testing immediately after fluting If the test is to be carried out immediately after fluting, the total time between discharge of the fluted test piece from the fluting rolls and the initial application of the crushing
48、force shall be 5 s to 8 s. Arrange all equipment to facilitate completing the operations in the specified time. For the most reliable results, the times shall be maintained within the 5 s to 8 s time limit from the discharge of the fluted test piece from the fluter to the initial application of force in the compression tester. To do this expeditiously, pre-cut the adhesive tape (5.4) that is to serve as the facing to its prescribed length (at least 120 mm long) and adhere
