GB/T 26202-2023Core-board (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 26202-2010 "Paper Tube and Paperboard". Compared with GB/T 26202-2010, except for structural adjustments and editorial changes, In addition, the main technical changes are as follows:

a) The expression of the scope of application has been changed (see Chapter 1, Chapter 1 of the 2010 edition);

b) Changed the quantitative requirements and the expression method of quantitative deviation, and added the calculation method of quantitative deviation (see 5.1 and 6.3, 2010 version 4.1);

c) Changed the name of the "Thickness" indicator to "Thickness and Thickness Deviation", changed the requirements for thickness, and added the calculation method for thickness deviation. (See 5.1 and 6.4, 4.1 of the 2010 edition);

d) Change the name of the "annular pressure index" indicator to "annular pressure strength index", delete the requirement for the transverse annular pressure strength index, and change the qualification The longitudinal ring pressure strength index and internal bonding strength requirements of the product (see 5.1, 4.1 of the 2010 edition);

e) Changed the water absorption requirements for first-class products and qualified products (see 5.1, 4.1 of the 2010 edition);

f) The delivery moisture requirements for high-quality products have been changed (see 5.1, 4.1 of the 2010 version);

g) Changed the width deviation of roll paper tube paperboard and increased the width range of disk paper tube paperboard (see 5.2.1, 2010 edition 4.2.1);

h) Integrate relevant provisions into "sensory characteristics and number of joints", and add the requirement of "no odor, mildew or other dirt" (see 5.3, 4.3, 4.4, 4.5, 4.6 and 4.7 of the 2010 edition);

i) Changed the diameter of "slurry lump or wet scar" (see 5.3.4, 4.7 of the 2010 edition).

1 Scope

This document specifies the classification, technical requirements, inspection rules, marking, packaging, transportation and storage of paper tubes and cardboard, and describes the corresponding tests. method.

This document applies to the production, inspection and sales of cardboard used in the manufacture of various types of paper tubes.

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 451.2 Determination of basis weight of paper and paperboard

GB/T 451.3 Determination of thickness of paper and cardboard

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

GB/T 1540 Determination of water absorption of paper and cardboard - Cobb method

GB/T 2679.8 Determination of ring crush strength of paper and cardboard

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

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 26203 Determination of internal bonding strength of paper and cardboard (Scott type)

3 Terms and definitions

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

4 Categories

4.1 Paper tubes and cardboard are divided into high-quality products, first-class products and qualified products according to quality.

4.2 Paper tube cardboard is divided into roll paper and coil paper according to different widths.

5 Technical requirements