GB/T 45850.1-2025Packaging sacks - Conditioning for testing - Part 1: Paper sacks (English PDF)

Foreword

This document was drafted in accordance with the provisions of GB/T 1.1-2020

Directives for standardization - Part 1.Rules for the structure and drafting of

standardizing documents.

This document is Part 1 of GB/T 45850 Packaging sacks - Conditioning for testing.

GB/T 45850 has been published in the following parts.

-- Part 1.Paper sacks.

This document is modified in relation to ISO 6599-1.1983 Packaging - Sacks -

Conditioning for testing - Part 1.Paper sacks.

This document has a number of structural adjustments compared to ISO 6599-1.1983.

A table comparing the structural numbers between the two documents is given in

Appendix A.

The technical differences between this document and ISO 6599-1.1983 and their

reasons are as follows.

-- The requirements for "digital thermometers and hygrometers, mechanical

thermometers and hygrometers, electric ventilation psychrometers or

mechanical ventilation psychrometers and other measuring instruments" have

been added (see 6.2) to meet the needs of technological progress and

development.

The following editorial changes have been made to this document.

-- To coordinate with the existing standard, the name of the standard is changed to

"Packaging sacks - Conditioning for testing - Part 1.Paper sacks";

-- The introductory notes on paper testing have been deleted, and the scope and

application fields have been merged (see Chapter 1; see Chapter 1 and Chapter

2 of ISO 6599-1.1983);

-- The explanatory descriptions referring to ISO 187 and ISO 544 have been deleted

(see the Note to Chapter 6 and Note 1 to Chapter 8 of ISO 6599-1.1983);

-- The example of "for example with calibrated wet and dry bulb thermometers"

has been deleted (see 7.1 of ISO 6599-1.1983);

-- The description of a further period for moisture equilibration for the paper sack

has been deleted (see Note 2 to Chapter 8 of ISO 6599-1.1983);

Packaging sacks - Conditioning for testing - Part 1.Paper

sacks

1 Scope

This document describes the complete empty paper sack pre-test and in-test

conditioning environment and sample conditioning methods.

This document applies to all types of empty paper sacks specified in GB/T 17858.1.

2 Normative references

The contents of the following documents constitute essential provisions of this

document through normative references in this text. For any dated reference, only the

version corresponding to that date applies to this document. For any undated reference,

the latest version (including all amendments) applies to this document.

GB/T 17858.1 Packaging Sacks - Vocabulary and types - Part 1.Paper sacks (GB/T

17858.1-2008, ISO 6590-1.1983, MOD)

3 Terms and definitions

The following terms and definitions apply to this document.

4 Principle

The empty paper sack is exposed to a specified conditioning environment so that the

empty paper sack reaches a state of temperature and moisture content equilibrium with

the environment.

5 Conditioning environment

Table 1 shows the appropriate conditioning environment. Unless otherwise specified in

the relevant specifications or test methods, or otherwise agreed upon between the

relevant parties, the 23/50 environmental conditions shall be used.

6 Equipment and facilities