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GB/T 6508-2015Test method for dyeing uniformity of polyester filament yarns (English PDF)

涤纶长丝染色均匀度试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 11, 2015

Implementation date

April 1, 2016

Scope

GB/T 6508-2015 is the English-translated version of 涤纶长丝染色均匀度试验方法.

GB/T 6508-2015 is the Chinese standard "Test Method for Dyeing Uniformity of Polyester Filament Yarns". Its scope clause reads: This Standard specifies the test method for dyeing uniformity of polyester filament yarns - hosiery dyeing method.

This Standard is applicable to draw texturing yarn and drawn yarn. Other types of filaments can be used for reference. Its clauses include terms and definitions; principle; reagents and materials; apparatus; test procedures; test report.

It was issued by the General Administration of Quality Supervision, Inspection and Quarantine on SEPTEMBER 11, 2015 and took effect on APRIL 1, 2016.

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Document preview — GB/T 6508-2015

National Standard of the People's Republic of China

ICS: 59.060.20
Classification: W 50
Replacing: GB/T 6508-2001

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

Foreword3
1 Scope4
2 Normative References4
3 Terms and Definitions5
4 Principle5
5 Reagents and Materials5
6 Apparatus6
7 Test Procedures6
8 Test Report10

Foreword

This Standard was drafted as per the rules specified in GB/T 1.1-2009.

This Standard replaced GB/T 6508-2001 Test Method for Dyeing Uniformity of Polyester Filament Yarns. The major differences between this Standard and GB/T 6508-2001 are as follows.

--- Cancel Method B Instrument Method (see Chapter 1 of this Edition; Chapter 1 of 2001 Edition);

--- Single feed yarn circular hosiery machine is changed into. test knitting machine; all "hosiery machine" in the corresponding standards is changed into "test knitting machine" (see 6.1 of this Edition; 4.1.4.1 of 2001 Edition);

--- Modify the scouring conditions; adopt 5g/L neutral soap powder (soap tablets), 1.25 above bath ratio, 85°C temperature, and scouring for 30min (see 7.3.1 of this Edition; 4.1.6.2 of 2001 Edition);

--- Dye concentration is changed into. disperse blue 2BLN recommended concentration of 1%~2% (for fabric mass) (see 7.4.1 of this Edition; 4.1.6.3 of 2001 Edition);

--- Modify the dying bath ratio into. bath ratio 1.20 ~ 1.60 (for fabric mass), determine according to the relevant dyeing machine requirements (see 7.4.1 of this Edition;

4.1.6.3 of 2001 Edition);

--- Dyeing soaking time is changed into. adopt 60min when arbitrating (see 7.4.1 of this Edition; 4.1.6.3 of 2001 Edition).

1 Scope

This Standard specifies the test method for dyeing uniformity of polyester filament yarns - hosiery dyeing method.

This Standard is applicable to draw texturing yarn and drawn yarn. Other types of filaments can be used for reference.

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 250 Textiles - Tests for Colour Fastness - Grey Scale for Assessing Change in Colour

GB/T 3291.1 Textiles - Terms of Textile Material Properties and Test - Part 1: Fiber and Yarn

GB/T 3291.3 Textiles - Terms of Textile Material Properties and Test--Part 3: General

GB/T 4146.1 Textiles - Man-Made Fibers - Part 1: Generic Names

GB/T 4146.3 Textiles - Man-Made Fibers - Part 3: Terms of Inspection

GB/T 6502 Sampling Method of Man-Made Filament Yarns

GB/T 14343 Testing Method for Linear Density of Man-Made Filament Yarns

FZ/T 01047 Standard Light Sources and Conditions for Visual Assessment of Textile Colour Fastness --- Temperature. 85°C;

--- Time. 30min.

7 Test Procedures

7.3.2 Scouring procedures

The scouring can be carried out directly in the dyeing machine; can also be carried out in other equipment with mixing device and can reach the scouring temperature. Operate according to the following procedures.

--- According to the garter quality, weigh neutral soap powder (soap tablet) (accurate to 1%) as per the provisions of 7.3.1; use 60°C small amount of water to dissolve into soap liquid;

--- According to the scouring equipment requirements, determine the bath ratio; pour water, soap liquid into scouring equipment, and prepare the scouring liquid bath; after thoroughly mixing, place into the garter; after raise temperature to 85°C, preserve heat for 30min;

--- Discharge waste liquid, take out garter; use about 85°C soft water to wash till it becomes neutral; dewater, and waiting for dyeing.

7.4 Dyeing

7.4.1 Dyeing conditions

The dyeing conditions are as follows.

--- Dyeing stuff. disperse blue 2BLN recommended concentration is 1%~2% (for fabric mass); determine the amount of adding according to the color absorption of the product;

--- Bath ratio. 1.20 - 1.60 (for fabric mass); determine according to relevant requirements of dyeing machine;

--- Dyeing temperature. boiling dyeing (the boiling point temperature is different as the atmospheric pressure is changed in different regions) or determine according to relevant requirements of dyeing machine;

--- Buffering agent. acetic acid - sodium acetate buffering solution, pH=5, add 1mL per liter of dye bath.

--- Soaking time. when arbitrating, adopt 60min; or determine according to relevant requirements of dyeing machine.

7.4.2 Dyeing procedures

Operate as per the following procedures. […]

......
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

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Editions of GB/T 6508

Edition	Title	Revision	Status
GB/T 6508-2015	Test method for dyeing uniformity of polyester filament yarns	current edition	Current
GB/T 6508-2001	Test method for dyeing uniformity of polyester filament yarns	previous edition	Superseded

This page sells the current edition, GB/T 6508-2015. Earlier editions are listed for reference only.

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