前言
国际标准化组织 (国际标准化组织) 是国家标准机构的全球联盟 (ISO成员机构). 国际标准的制定通常通过ISO技术委员会进行. 每个对已成立技术委员会的主题感兴趣的成员机构都有权在该委员会中派代表参加. 与 ISO 联络的国际政府和非政府组织也参与了这项工作. ISO 与国际电工委员会密切合作 (国际电工委员会) 关于电工标准化的所有问题.

用于开发本文件的程序以及用于进一步维护的程序在第 1 部分中进行了描述。 1 ISO/IEC 指令的. 尤其, 注意不同类型的 ISO 文件所需的不同批准标准. This document has been drafted in accordance with the editing rules in Part 2 ISO/IEC 指令的 (请参阅 iso.org/directives).

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Any trade names used in this document are information provided for the convenience of the user and do not constitute an endorsement.

自主性, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (技术性贸易壁垒) 坚持世界贸易组织原则 (世贸组织) 信息, please refer to the iso.org/iso/foreword.html.

This document has been prepared in cooperation with the Technical Committee’s ISO/TC 6 (纸, Board and pulp), SC 2 Subcommittee (纸和纸板的测试方法和质量规范) and the Technical Committee of the European Committee for Standardization (欧洲标准化委员会) 欧洲标准化委员会/TC 172 (纸浆, 纸和纸板), According to the Technical Cooperation Agreement between ISO and CEN (维也纳协定).

The third edition cancelled and replaced the technically revised second edition (国际标准化组织 12625-4:216).

主要变化如下:

— Includes Appendix B, which describes the method for determining the tensile modulus.

ISO 中所有部件的列表 12625 系列可以在 ISO 网站上找到.

Any feedback or questions about this document should be directed to the user’s national standards body. A complete list of these institutions can be found at www.iso.org/members.html.

1 范围
This document specifies test methods for the determination of tensile strength maximum tensile strength and tensile energy absorption of tissue and household paper products. It uses tensile testing equipment that operates at constant elongation.

It also provides the calculation methods of tensile index and tensile energy absorption index.

2 规范性引用文件
文中引用下列文件，其部分或全部内容构成本文件的要求. 对于注明日期的参考文献, 仅引用版本适用. 对于未注明日期的参考文献, 新版本的参考 (包括任何修订) 适用.

国际标准化组织 186, 纸和纸板 — 抽样以确定平均质量

国际标准化组织 187, 纸, 纸板和纸浆 — 用于调节和测试的标准大气以及用于监测样品大气和调节的程序

国际标准化组织 1924-2, 纸和纸板 – 拉伸性能的测定 – 部分 2: Constant elongation method (20 毫米/分钟)

国际标准化组织 7500-1, 金属材料 – 静态单轴试验机的校准和验证 – 部分 1: 拉伸/压缩试验机 – 力测量系统的校准和验证

国际标准化组织 12625-1, 薄纸及薄纸制品 – 部分 1: 词汇

国际标准化组织 12625-6, 薄纸及薄纸制品 – 部分 6: 克重的测定

国际标准化组织 12625-4-2022 薄纸及薄纸制品 – 部分 4: 拉伸强度的测定, 最大拉伸强度和拉伸能量吸收

3 术语和定义
就本文件而言, the terms and definitions set forth in ISO 12625-1 和以下适用.

3.1 抗拉强度

The maximum tensile force per unit width that a specimen can withstand before breaking

3.2 Tensile index

抗拉强度 (3.1) divided by gram weight

3.3 Maximum tensile force

The ratio of the elongation of the specimen over its initial length at the moment when the maximum tension is reached during the tensile test

笔记 1: The stretch at maximum force is expressed as a percentage of the initial test span length.

笔记 2: Relaxation correction is used in this procedure, and elongation is not measured until a force of (0,25 ± 0,05) 氮.

3.4 Tensile energy absorption

The energy absorbed when stretching a specimen under tensile force per unit surface area until fracture begins (maximum pulling moment)

[来源: 国际标准化组织 12625-1:2019, 3.53.1.3]

3.5 Tensile energy absorption index

Tensile energy absorption (3.4) divided by gram weight

[来源: 国际标准化组织 1924-2:2008, 3.7]

3.6 Tensile modulus M

The slope between the two points of tension on the elongation curve obtained from a constant elongation device

笔记 1: In the paper industry, “modulus” refers to the tensile stiffness of paper, units of force per unit width (as opposed to true “压力” in engineering terms, IE. force per unit area).

笔记 2: This procedure is optional, but if the tensile modulus is required as a measurement for this method, it should be measured and calculated according to the procedure in Annex B.

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