ISO 5630-6:2009 紙と板紙—加速劣化—パート6：大気汚染（二酸化窒素）への暴露 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO 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-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, 2.

The main task of technical committees is to prepare International Standards. Draft 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.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 5630-6 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for paper and board.

ISO 5630 consists of the following parts, under the general title Paper and board — Accelerated ageing:

• Part 1: Dry heat treatment at 105 °C
• Part 3: Moist heat treatment at 80 °C and 65 % relative humidity
• Part 4: Dry heat treatment at 120 or 150 °C
• Part 5: Exposure to elevated temperature at 100 °C
• Part 6: Exposure to atmospheric pollution (nitrogen dioxide)

Introduction

Exposure of paper or board to a hostile environment, such as some type of radiation, elevated temperature or chemical pollutant, over a period of hours, can provide information concerning the natural changes that can occur in the material over a period of years.

This test method for accelerated ageing by exposure of paper to an elevated concentration of nitrogen dioxide is based on the method developed by ASTM ^[1] following an extensive research program. In this program, 15 printing and writing papers were tested, representing a wide variety of paper types (acid and alkaline, lignin-containing and lignin-free, and those with and without an alkaline reserve such as calcium carbonate). This method proved to be the one most relevant to judge the effects of atmospheric pollutant gases on the long-term mechanical strength and optical stability of such papers. To get a full understanding of the stability of the paper to long-term natural ageing effects, a combination of test methods for accelerated ageing is used.

1 Scope

This part of ISO 5630 specifies a method for accelerating the ageing of printing and writing papers through exposure to nitrogen dioxide gas and assessing the effect on mechanical and optical properties for the purpose of predicting stability to long-term natural ageing that occurs due to exposure to polluted air. It is applicable to all cellulose-based printing and writing papers, including coated papers and filled papers.

2 Normative references

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.

3 Terms and definitions

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

Bibliography