ISO 13820:2021 紙、板紙、段ボール—固定プラテン圧縮試験装置の説明と校正 | 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 third edition cancels and replaces the second edition (ISO 13820:2014), which has been technically revised:

The main changes are as follows:

• the title of this document has been changed;
• “fixed platen” has been added to the scope;
• former 4,2, 5.2 and Annex A have been removed;
• Clause 6 has been restructured with additional sub-clauses added for clarity;
• the bibliography has been updated.

Introduction

This document describes the fixed-platen compression tester used for carrying out compression tests on paper, board, and corrugated fibreboard. This equipment develops compressive forces at a constant rate of strain. This is the primary equipment used in modern test labs, preferred because of its reliability, its ability to test over the range of test levels likely to be found, and because the characteristics of existing instruments have been well defined and universally accepted.

Another instrument, known as the beam-deflection compression tester, develops compressive forces between one platen driven at constant speed and another platen resting on a deformable beam. With this type neither rate of stress nor rate of strain is constant. The two instrument types produce different results^[1][2][3][7]. The extent of the difference depends on the test being conducted and on the characteristics, particularly the elastic characteristics, of the material being tested. The beam-deflection tester has been inadequately defined in past International Standards for compression tests; among existing instruments there have been different loading rates, different beam stiffnesses, and therefore different rates of strain. It is no longer described in this document.

The testing equipment referred to in this document is used for tests described in ISO 3035 ^[1], ISO 3037^[2], ISO 7263 ^[3], ISO 12192 ^[4], ISO 13821 ^[5], and ISO 16945 ^[6], among others.

1 Scope

This document specifies the essential characteristics and the principles of calibration of fixed platen compression testing equipment used in the testing of paper, board, and corrugated fibreboard.

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

No terms and definitions are listed in this document.

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

Bibliography