介绍
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) 关于电气标准化的所有问题.

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, 应注意不同类型ISO文件所需的不同批准标准. 本文件根据 ISO/IEC 指令部分的编辑规则起草 2 (请参阅 iso.org/directives).

请注意，本文档的某些元素可能受专利权保护. ISO 不负责识别任何或所有此类专利. 在文件准备过程中确定的任何专利权的详细信息将在 ISO 收到的专利声明的简介和/或列表中找到 (参见 iso.org/patents).

国际标准化组织 2493-2-1920 – 纸和纸板抗弯强度的测定 – 部分 2: 泰伯型试验机

本文档中使用的任何商品名称都是为了方便用户而提供，并不构成认可.

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 by Technical Committee ISO/TC 6, 纸, Board and Pulp, 分委会SC 2, Test Methods and Quality Specifications for Paper and board.

The second edition cancels and replaces the technically revised first edition (国际标准化组织 2493-2:2011). The main changes from the previous edition are as follows:

– Other data reported in Article 12;

– Several editorial updates.

国际标准化组织 2493-2-1920 – 纸和纸板抗弯强度的测定 – 部分 2: 泰伯型试验机

A list of all the components in the ISO 2493 系列可以在 ISO 网站上找到.

有关本文件的任何反馈或问题应直接提交给用户的国家标准机构. A complete list of these institutions can be found at iso.org/members.html.

1 范围
This document specifies the steps for measuring the bending resistance of paper and paperboard using the Taber type tester.

This document is used to determine the bending moment required to deflector the free end of a 38 mm wide vertically clampdown specimen by 15° when a load is applied at a 50 mm bending length. For a circuit board that bends 15° and tends to permanently deform, you can use a semi-bending Angle, 那是, 7,5 °. The bending resistance is expressed as the bending moment and parameters set by the manufacturer of the Taber tester.

This method is mainly used for paper with high gram weight.

Note that this document does not cover a lower range version of the Taber type instrument with a 10 mm bending length (参见参考文献 [5]).

国际标准化组织 2493-2-1920 – 纸和纸板抗弯强度的测定 – 部分 2: 泰伯型试验机

2 规范性引用文件
以下文件以文本方式引用，构成本文件的部分或全部要求. 对于注明日期的参考文献, 仅引用的版本适用. 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

3 术语和定义
就本文件而言, 以下术语和定义适用.

3.1 Bending moment M

The torque required to bend a rectangular specimen clipped at one end is measured under the conditions specified in this document

笔记 1: The bending moment is expressed in millinewtonian meters (mN·m).

3.2 Flexural resistance B

The average bending moment (3.1) required to bend a rectangular specimen fixed to one end of the fixture is measured under the conditions specified in this document

笔记 1: Flexural resistance is expressed in millinewtonian meters (mN·m).

国际标准化组织 2493-2-1920 – 纸和纸板抗弯强度的测定 – 部分 2: 泰伯型试验机

3.3 Bending Angle α

The Angle at which the fixture rotates when it moves from its initial position to the position where the bending resistance (3.2) 被测量

笔记 1: The bending Angle is 15° or 7.5° (见文章 10).

3.4 Bending Length

The radial distance between the fixture and the position where the force is applied on the sample under test is constant

3.5 Flexural index

Flexural resistance (3.2) divided by gram weight to the third power

仅标准信息部分是公开的. 查看完整内容, 需要通过官方渠道购买标准.