GB/T 7969-2023Cable paper (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document replaces GB/T 7969-2003 "Power Cable Paper" and GB/T 7970-1999 "Communication Cable Paper". This document begins with It is mainly based on GB/T 7969-2003 and integrates the contents of GB/T 7970-1999. Compared with GB/T 7969-2003, except for structural adjustment and In addition to editorial changes, the main technical changes are as follows:

a) The scope of application of the document has been changed (see Chapter 1, Chapter 1 of GB/T 7969-2003);

b) The classification by quality (see Chapter 3 of GB/T 7969-2003) is deleted, and the classification by thickness is added (see Chapter 4);

c) Added requirements for cable paper with thicknesses of "50µm, 65µm, 75µm, 100µm, 125µm, 180µm and 250µm" (See Table 1);

d) The requirements and test methods for thickness deviation have been changed (see Tables 1 and 6.3, Tables 1 and 5.4 of GB/T 7969-2003);

e) The requirements for tightness have been changed (see Table 1, Table 1 of GB/T 7969-2003);

f) The requirements and test methods for tensile index have been changed, and "tensile strength" has been changed to "tensile index" (see Tables 1 and 6.5, Table 1 and 5.6 of GB/T 7969-2003);

g) The requirements and test methods for elongation have been changed (see Tables 1 and 6.5, Tables 1 and 5.7 of GB/T 7969-2003);

h) Changed the requirements for tear index, changing "tear degree" to "tear index" (see Table 1, Table 1 of GB/T 7969-2003);

i) Changed the requirements for electrical strength and dry paper dielectric loss tangent (tandelta) (100°C) (see Table 1, GB/T 7969-2003 Table 1);

j) The requirements and test methods for pH value of water extract, conductivity and air permeability of water extract have been changed (see Tables 1, 6.9, 6.10 and 6.11, Table 1, 5.12, 5.13 and 5.14 of GB/T 7969-2003);

k) Changed the requirements for delivery moisture, changing "moisture" to "delivery moisture" (see Table 1, Table 1 of GB/T 7969-2003);

l) The requirements and test methods for folding endurance are deleted (see Tables 1 and 5.9 of GB/T 7969-2003);

m) The requirements for dimensions and dimensional deviations have been changed (see 5.2, 4.2 of GB/T 7969-2003);

n) The requirements for the number of joints have been changed (see 5.4, 4.5 of GB/T 7969-2003);

o) The inspection rules have been changed (see Chapter 7, Chapter 6 of GB/T 7969-2003);

p) The supplementary content of packaging has been deleted (see 7.2 of GB/T 7969-2003).

1 Scope

This document stipulates the product classification, technical requirements, inspection rules and marking, packaging, transportation and storage of cable paper, and describes the corresponding testing procedures. test method.

This document applies to the production, inspection and sales of cables and other electrical insulation papers with rated voltages not greater than 35kV.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 450 Collection of paper and cardboard samples and measurement of longitudinal, transverse, front and back sides of the samples

GB/T 451.1 Determination of dimensions and deflection of paper and cardboard

GB/T 451.3 Determination of thickness of paper and cardboard

GB/T 455 Determination of tear strength of paper and cardboard

GB/T 458-2008 Determination of air permeability of paper and cardboard

GB/T 462 Determination of moisture content of paper, cardboard and pulp analysis samples

GB/T 742 Determination of burning residue (ash) of papermaking raw materials, pulp, paper and cardboard (575°C and 900°C)

GB/T 1545-2008 Determination of acidity or alkalinity of aqueous extracts of paper, cardboard and pulp

GB/T 2828.1 Enumeration sampling inspection procedures Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)

GB/T 3333 Test method for power frequency breakdown voltage of cable paper

GB/T 3334 Cable paper dielectric loss tangent (tgdelta) test method (bridge method)

GB/T 7977-2007 Determination of electrical conductivity of paper, cardboard and pulp aqueous extracts

GB/T 10342 Paper packaging and marking

GB/T 10739 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp samples

GB/T 12914 Determination of tensile strength of paper and paperboard - Constant speed tensile method (20mm/min)

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Product categories

4.1 Cable paper is divided into low-tightness cable paper (DLZ-D) and high-tightness cable paper (DLZ-G) according to tightness.

4.2 Cable paper is divided into type I, type II and type III according to thickness. Among them, Type I includes three specifications. 50µm, 65µm, and 75µm. Type II includes It includes 4 specifications of 80µm, 100µm, 125µm and 130µm. Type III includes 4 specifications of 170µm, 180µm, 200µm and 250µm.