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GB/T 41558-2022Determination of staple length and strength (English PDF)

毛丛长度强度试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 11, 2022

Implementation date

February 1, 2023

Scope

GB/T 41558-2022 is the English-translated version of 毛丛长度强度试验方法.

GB/T 41558-2022 is the Chinese test method for the length and the strength of wool staples. It describes how the mean tuft length, the mean tuft strength and the breaking position of greasy wool are determined, and it applies to greasy sheep wool in tuft form.

It defines the staple as a well-defined, distinct fibre bundle isolated from a mass of greasy wool, the tuft of staples as the one to twenty staples taken out by a snatcher or by hand in a single operation, and the staple length as the length measured along the axis of the tuft with the fibres unstretched and the crimp undamaged.

It cites GB/T 27629 for the breaking strength of the fibre bundle and GB/T 8170 for rounding the results. It was issued on 11 July 2022 and has applied since 1 February 2023.

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Document preview — GB/T 41558-2022

National Standard of the People's Republic of China

ICS: 59.060
Classification: W 20

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and Definitions

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 of Standardization Documents" drafted.

1 Scope

This document describes the determination of the mean tuft length, mean tuft strength and breaking position of greasy wool.

This document applies to greasy sheep wool in tuft form.

2 Normative references

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

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

GB/T 27629 Test method for breaking strength of pile fibers

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Hairy staple

Well-defined, overall distinct fiber bundles isolated from a large number of greasy hairs.

3.2 Tuft of staples

A tuft of sheep wool consisting of 1 to 20 tufts of tufts taken out by a snatcher or by hand in one operation (see Figure 1).

3.3 Staple length

The length measured along the axis of the tuft when the fibers in the tuft are not stretched and the curl is not damaged.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

GB/T 43170-2023Rugulations for sampling and testing of wool

Similar standards

GB/T 43170-2023|GB/T 41557-2022|GB/T 16256-2008|GB/T 17644-2008|GB 1523-2026|GB 18267-2026

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