GB/T 9107-2023Refined cotton (English PDF)

Foreword

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

This document replaces GB/T 9107-1999 "Refined Cotton". Compared with GB/T 9107-1999, except for structural adjustments and editorial changes In addition, the main technical changes are as follows:

a) The scope has been changed. the scope of application has been changed from alkaline cooking to cooking (see Chapter 1, Chapter 1 of the 1999 edition);

b) Added product form (see 4.1.2), changed specifications (see 4.2, 3.2.2 of the 1999 edition), and model composition (see 4.4, 1999 edition version 3.2);

c) Added foreign fibers for refined cotton floc products (see 5.1), impurities for refined cotton floc products (see 5.2), and refined cotton roll (sheet) products The degree of dust (see 5.3), the bursting strength of refined cotton products (see 5.4) and the basis weight and thickness of refined cotton roll (sheet) products (see 5.5);

d) The product models of refined cotton for cellulose acetate, refined cotton for cellulose ether, and refined cotton for nitrocellulose have been added, and technical changes have been made.

Technical performance indicators (see 5.6, 5.7, 5.8, 4.2.1, 4.2.3, 4.2.2 of the 1999 edition);

e) Added general provisions (see 6.1), environmental requirements for sample preparation (see 6.2.1) and roll (sheet) sample preparation (see 6.2.3);

f) Determination methods are added, including intrinsic viscosity (see 6.3), acetone soluble matter (see 6.11), foreign fibers (see 6.12), impurities (see 6.13), degree of dust (see 6.14), basis weight, thickness (see 6.15), bursting strength (see 6.16);

g) Changed the inspection rules (see Chapter 7, Chapter 6 of the 1999 edition);

h) The marking, packaging, transportation and storage have been changed (see Chapter 8, Chapter 7 of the 1999 edition), and delivery has been added (see 8.5).

1 Scope

This document specifies the product type, requirements, test methods, inspection rules, marks, packaging, transportation, storage and delivery of refined cotton.

This document is applicable to refined cotton produced from cotton linters through cooking, bleaching and other processes.

2 Normative references

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

GB/T 451.2 Determination of Quantitative Quantity of Paper and Board

GB/T 451.3 Determination of thickness of paper and cardboard Preparation of

GB/T 601 Chemical Reagent Standard Titration Solution Preparation of preparations and products used in GB/T 603 test methods for chemical reagents

GB/T 740 Pulp sample collection

GB/T 1539 Determination of bursting strength of cardboard

GB/T 1541 Determination of dustiness of paper and cardboard

GB/T 1548 Determination of intrinsic viscosity value in pulp copper ethylenediamine (CED) solution

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 8170 Numerical rounding off rules and expression and determination of limit values

GB/T 8946 General Technical Requirements for Plastic Woven Bags

GB/T 22902 Determination of acetone soluble matter in pulp

QB/T 2190 Wire brush

3 Terms and Definitions

The following terms and definitions apply to this document.