FZ/T 01086-2020Textiles - Test method for yarn hairness - Projection counting method (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces FZ/T 01086-2000 "Textiles - Test method for yarn hairness -

Projection counting method". Compared with FZ/T 01086-2000, the main technical

changes in this Standard are as follows:

-- Supplement the scope of products not applicable in Chapter 1 (see Chapter 1 of

this Edition);

-- Modify the title of Chapter 2 "References" to "Normative references" and the

description of referenced documents. Delete GB/T 8170-1987 as a reference.

Adjust the reference standard GB 6529-1986 to GB/T 6529 (see Chapter 2 of this

Edition);

-- Modify the title "Definition" of Chapter 3 to "Terms and definitions". Modify 3.4

"hairness index" to "hairness count". Add the term and definition of 3.5 "length

between" (see Chapter 3 of this Edition);

-- Adjust Chapter 4 "Principle" (see Chapter 4 of this Edition);

-- Adjust the accuracy of the instrument. Supplement and improve the requirements

for the instrument (see Chapter 5 of this Edition);

-- Add Figure 1 "Schematic diagram of the built-in edge of the hairness tester" (see

Figure 1 of this Edition);

-- Modify the title of Chapter 6 "Sample quantity and number of tests" to "Sampling"

(see Chapter 6 of this Edition);

-- Move the content related to setting the number of tests in 6.4 to Chapter 8 (see 8.3

of this Edition; 6.4 of Edition 2000);

-- Add the requirement that "in order to avoid changes in yarn hairness morphology,

the specimen shall not be unwound before testing" in 6.4 (see 6.4 of this Edition;

1 Scope

This document specifies the method for measuring the hairness of short fiber yarns

using an optical projection hairness tester.

This Standard applies to:

a) Cotton yarn and cotton fiber yarn;

b) Wool yarn and wool fiber yarn;

c) Linen yarn;

d) Silk spinning yarn;

e) Medium to long fiber yarn;

f) All types of blended yarns.

This Standard does not apply to high elastic yarns, bulked yarns and fancy yarns.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition cited applies. For undated references,

the latest edition of the referenced document (including any amendments) applies.

GB/T 6529, Textiles -- Standard atmospheres for conditioning and testing

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

4 Principle

When the continuously moving yarn passes through the detection area, its hairness will

block the projection beam accordingly, or the yarn hairness will be amplified and

imaged on the projection screen. At this time, the electronic photosensitive device

converts the imaging hairness into electrical signals and processes the signals. The

hairness count on one side of the yarn is classified and counted according to different

set lengths.

5 Equipment