ISO 7263-2:2018 波形媒体—実験室フルート後のフラットクラッシュ抵抗の決定—パート2：Bフルート | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for paper and board.

This document cancels and replaces ISO 7263:2011, which has been technically revised.

This document adds a version of the test method covering the use of a B-flute fluter, expanding the flexibility of the technical approach using the same general methodology. Prior to this revision of the method, ISO 7263 allowed only for the use of A-flute equipment. That method is maintained as ISO 7263-1.

The main changes compared with ISO 7263:2011 are as follows:

• ISO 7263 has been divided into two parts due to technical developments to allow both A-flute (Part 1) and B-flute (Part 2) performance to be tested;
• Clause 1: the scope has been modified;
• Clause 2: normative references have been changed;
• 5.2: measurements for B-flute have been added;
• 5.3: description of rack and comb has been modified;
• 5.3: Figure 3 has been added;
• 5.5: description of flat crush tester has been modified;
• Clause 7 has been modified;
• Clause 7: this document requires conditioning of samples where testing will be carried out immediately after fluting, not only where test pieces will be reconditioned before testing;
• Clause 8 has been modified;
• 9.2: for testing immediately after fluting the time between fluted test piece discharge and initial application of force has been increased to a more realistic level;
• Clause 11: precision with more detailed description of precision data according to ISO/TR 24498 and TAPPI T 1200 has been moved to informative Annex B;
• Test report is now Clause 11 and has been updated;
• Annex B: precision data according to ISO/TR 24498 and TAPPI T 1200 has been added.

A list of all parts in the ISO 7263 series can be found on the ISO website.

Introduction

The flat crush resistance of laboratory-fluted corrugating medium is regarded as a property indicating 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 used:

• a) the fluted corrugating medium is compressed immediately after fluting (i.e. 15 s to 25 s after fluting);
• b) the fluted corrugating medium is conditioned for 30 min to 35 min under standard laboratory test conditions before being compressed.

Since considerable advantages are claimed for both procedures and both are widely used, the ISO 7263 series describes both procedures. Procedure a) generally gives considerably higher 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.

ISO 7263-1^[6] describes the testing method for the A-flute geometry.

This document describes the testing method for the B-flute geometry.

The option of using an A- or B-flute geometry is to be determined by the producer and/or the end-use customer; it is not required for any particular flute structure.

A method for determining the flat crush resistance of manufactured corrugated fibreboard is given in ISO 3035 ^[3].

1 Scope

This document describes a method for the determination of the flat crush resistance of a corrugating medium after laboratory fluting using a B-flute geometry.

The procedure is applicable to any corrugating medium intended to be used, after fluting, in the manufacture of corrugated board.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography