GB/T 7977-2007 in English
VALIDPaper board and pulps—Determination of conductivity of aqueous extracts
- Issued on:2007-12-05
- Implemented on:2008-09-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
本标准规定了纸、纸板和纸浆水抽提液电导率的测定方法。
本标准适用于包括电气用绝缘纸和纸板在内的各种纸、纸板和纸浆。 本标准修改采用ISO 6587:1992《纸、纸板和纸浆 水抽提液电导率的测定》(英文版)。
本标准代替GB/T7976-1987《绝缘纸和纸板 水抽提液电导率的测定》、GB/T7977-1987《纸浆、纸和纸板 水抽提液电导率的测定》。
本标准与GB/T7976-1987和GB/T7977-1987相比主要变化如下:
---增加了前言;
---修改了范围,明确本标准适用于包括电气用的绝缘纸和纸板的测定(1987版的第1章,本版的第1章);
---增加了规范性引用文件(本版的第2章);
---增加了原理(本版的第3章);
---修改了试剂的要求(1987版的第3章,本版的第4章);
---修改了仪器的要求(1987版的第2章,本版的第5章);
---将试验步骤与结果计算分成两章,修改了试验步骤,增加了绝缘纸和纸板水抽提液的测定方法,方法二增加了冷抽提法、加热板法,修改了结果的表示(1987 版的第6 章,本版的第7、8章);
---增加了质量保证与控制(本版的第9章);
---增加了试验报告(本版的第10章);
---修改了电导率的表示单位(1987版的第2、3、6章,本版的第4、5、8、10章);
---增加了附录A(资料性附录)本标准与ISO6587:1992章条编号对照;
---增加了附录B(资料性附录)本标准与ISO6587:1992的技术性差异及其原因。
Scope
This standard specifies the determination method of electrical conductivity of paper, cardboard and pulp water extract. This standard applies to all kinds of paper, paperboard and pulp including insulating paper and paperboard for electrical purposes.

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