SN/T 0459-2005Rules of inspection for import and export acetate tow (English PDF)

Foreword

This standard is to amend SN/T 0459-1995 "Import and Export of Acetate Fiber Tow Inspection Procedures".

The main changes in this standard compared with SN/T 0459-1995 are as follows.

1. Additions and deletions to the "normative references" and "terms and definitions" of the original standard;

2. According to GB/T 14338-1993, the determination of the number of crimps has been modified;

3. Change the "total number of tows" in the original standard to "tow density" and "monofilament density" to "monofilament density";

4. Modifications to the unit of measure error and certain quantity representation methods in the original standard;

5. The inspection items with national standards are implemented according to the corresponding national standards;

6. Items listed in the original standard with reference to foreign relevant standards are listed in Appendix A, Appendix B, Appendix C and Appendix D;

7. Make some textual changes to some of the original standards;

8. Adjustments have been made to the chapter layout;

9. Some instruments specified in the original standard were adjusted;

10. Added a description of the "principle" to the quality inspection project;

11. According to the tobacco industry standards and actual import and export contracts, the whiteness inspection project is cancelled;

12. The content of "judgment of test results" has been added.

Appendix A, Appendix B, Appendix C and Appendix D of this standard are normative appendices.

This standard replaces SN/T 0459-1995 from the date of implementation.

This standard is proposed and managed by the National Certification and Accreditation Administration.

This standard was drafted. Henan Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Hainan Entry-Exit Inspection and Quarantine Bureau, Anyang Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China, Yunnan Entry-Exit Inspection and Quarantine Bureau of the People's Republic of China.

1 Scope

This standard specifies the inspection methods for the quantity, appearance and quality of the imported and exported acetate fiber tow.

This standard is applicable to the inspection of the quantity, appearance and quality items of the acetate fiber tow for import and export.

2 Normative references

The terms in the following documents become the terms of this standard by reference to this standard. All dated references, followed by all Modifications (not including errata content) or revisions do not apply to this standard, however, parties to agreements based on this standard are encouraged to study is it possible to use the latest version of these files? For undated references, the latest edition applies to this standard.

GB/T 8170 numerical rounding rules GB/T 16256 Textile fiber linear density test method vibrometer method

3 Terms and definitions

The following terms and definitions apply to this standard.

The percentage of residual acetone in the fiber to the dry weight of the fiber sample.

The number of crimps per unit length of the monofilament that make up the tow.

Throughout the test, the holder holding the sample is fixed and one is moved at a constant speed to make the elongation of the sample positive with time.

A test of comparison.

4 Sampling