GB/T 9107-1999 in English

1 Scope

This standard specifies the classification, requirements, test methods, inspection rules, and marking, packaging, transportation and storage of refined cotton.
This standard is applicable to refined cotton made of cotton linters via such refining treatments as alkaline cooking and bleaching.

2 Normative References

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, all the editions listed are valid. All standards are subject to revision, parties to agreements based on this standard are encouraged to investigate the possibility of applying the latest editions of the standards indicated below.
GB/T 603-1988 Chemical Reagent - Preparations of Reagent Solutions for Use in Test Methods
GB/T 8170-1987 Rules for Rounding off of Numerical Values
The raw material standards quoted by this standard are detailed in Appendix A (Normative).

3 Product Classification and Code

3.1 Refined cotton products are classified into three classes by use, namely refined cotton used for cellulose acetate, refined cotton used for nitrocellulose and refined cotton used for cellulose ether.
3.2 Product code generally consists of use code, specification code and performance code, and its expression method is shown in Figure 1.

Contents
Foreword i
1 Scope
2 Normative References
3 Product Classification and Code
4 Requirements
5 Test Methods
6 Inspection Rules
7 Marking, Packaging, Transportation and Storage
Appendix A (Normative) Raw Material Standards Quoted in this standard
Appendix B (Normative) Preparation Method of Ammoniacal Copper Solution
Appendix C (Informative) Corresponding Determined Values of Polymerization Degree and Viscosity
Appendix D (Informative) Determination Method of Polymerization Degree