GB/T 2910.16-2024Textiles - Quantitative chemical analysis - Part 16: Mixtures of polypropylene fibres with certain other fibres (method using xylene) (English PDF)

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020,

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

standardizing documents.

This document is Part 16 of GB/T 2910 Textiles - Quantitative chemical analysis. The

following parts have been issued for GB/T 2910.

-- Part 1.General principles of testing;

-- Part 2.Ternary fibre mixture;

-- Part 3.Mixtures of acetate and certain other fibres (method using acetone);

-- Part 4.Mixtures of certain protein fibres with certain other fibres (method

using hypochlorite);

-- Part 5.Mixtures of viscose, cupro or modal and cotton fibres (method using

sodium zincate);

-- Part 6.Mixtures of viscose or certain types of cupro or modal or lyocell and

cotton fibres (method using formic acid and zinc chloride);

-- Part 7.Mixtures of polyamide and certain other fibres (method using formic

acid);

-- Part 8.Mixtures of acetate and triacetate fibres (method using acetone);

-- Part 9.Mixtures of acetate with certain other fibres (method using benzyl

alcohol);

-- Part 10.Mixtures of triacetate or polylactide and certain other fibres (method

using dichloromethane);

-- Part 11.Mixtures of certain cellulose fibres with certain other fibres (method

using sulfuric acid);

-- Part 12.Mixtures of acrylic, certain modacrylics, certain chlorofibres, certain

elastane fibres with certain other fibres (method using dimethylformamide);

-- Part 13.Mixtures of certain chlorofibers and certain other fibers (method

using carbon disulfide/acetone);

-- Part 14.Mixtures of acetate and certain chlorofibres (method using acetic

acid);

-- Part 15.Mixtures of jute and certain animal fibres (method by determining

nitrogen content);

-- Part 16.Mixtures of polypropylene and certain other fibres (method using

xylene);

-- Part 17.Mixtures of chlorofibers (homopolymers of vinyl chloride) and

certain other fibers (method using sulfuric acid);

-- Part 18.Mixtures of silk and wool or hair (method using sulfuric acid);

-- Part 19.Mixtures of cellulose fibres and asbestos (method by heating);

-- Part 20.Mixtures of elastane and some other fibers (method of using

dimethylacetamide);

-- Part 21.Mixtures of chlorofibers, certain modacrylics, certain elastanes,

acetates, triacetates and certain other fibers (method using cyclohexanone);

-- Part 22.Mixtures of viscose or certain types of cupro or modal or lyocell and

flax of ramie fibres (method using formic acid and zinc chloride);

-- Part 23.Mixtures of polyethylene and polypropylene (method using

cyclohexanone;

-- Part 24.Mixtures of polyester and some other fibers (method using phenol

and tetrachloroethane);

-- Part 25.Mixtures of polyester and certain other fibres (method using

trichloroacetic acid and chloroform);

-- Part 26.Mixtures of melamine and cotton or aramide fibers (method using hot

formic acid);

-- Part 101.Mixtures of soybean protein composite fibre and certain other fibers.

This document serves as a replacement of GB/T 2910.16-2009 Textiles - Quantitative

chemical analysis - Part 16.Mixtures of polypropylene and certain other fibres (method

using xylene). In comparison with GB/T 2910.16-2009, apart from structural

adjustments and editorial modifications, the main technical changes are as follows.

-- Change the Scope by including lyocell fiber, polyester composite elastic fiber,

melamine fiber and polyacrylate fiber (see Chapter 1; Chapter 1 of the 2009

edition);

-- Change the boiling point of xylene from "137 degrees C ~ 142 degrees C" to "136 degrees C ~

145 degrees C" (see Chapter 5; Chapter 4 of the 2009 edition);

-- Change "stoppered conical flask" to "stoppered round-bottom flask" (see

Chapter 6; Chapter 5 of the 2009 edition);

-- Add 6.3 Heating mantle apparatus (see 6.3);

-- Improve the Test procedures, by specifying the preheating temperature, and

supplementing the alternative test apparatus (see Chapter 7; Chapter 6 of the 2009 edition);

-- Add the d value of the newly added fibers (see Chapter 8);

-- Change the confidence limit in Precision from "not more than +/-1" to "not

more than +/-1%" (see Chapter 9; Chapter 8 of the 2009 edition).

This document modifies and adopts ISO 1833-16.2019 Textiles - Quantitative chemical

analysis - Part 16.Mixtures of polypropylene fibres with certain other fibres (method

using xylene).

The technical differences between this document and ISO 1833-16.2019, and the causes

for these differences are as follows.

-- Use the normative reference GB/T 2910.1 to replace ISO 1833-1 (see

Chapters 5 ~ 8), for standard use.

1 Scope

This document describes a method for the determination of the polypropylene fiber

content in a two-component mixture consisting of the following fibers after removal of

non-fibrous matter using the xylene method.

2 Normative references

The following documents are referred to in the text in such a way that some or all of

their content constitutes requirements of this document. For dated references, only the

version corresponding to that date is applicable to this document; for undated references,

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

3 Terms and definitions

No terms and definitions need to be defined in this document.

4 Principle

Use boiling xylene to dissolve and remove the polypropylene fiber from a mixture of

known dry mass; collect the residue; wash, dry and weigh it; use the corrected mass to

calculate its percentage of the dry mass of the mixture.

5 Reagents

Use the reagents specified in GB/T 2910.1 and 5.1.

Warning. This reagent is harmful to the human body.

6 Apparatus

Use the apparatus specified in GB/T 2910.1 as well as 6.1, 6.2 and 6.3.

7 Test procedures

Follow the general procedures specified in GB/T 2910.1, and then follow the steps

below.

8 Calculation and presentation of results

The calculation and presentation of the results shall be in accordance with the

provisions of GB/T 2910.1.

9 Precision

For a homogeneous mixture of textile materials, at the 95% confidence level, the

confidence limit of the test results of this method shall not exceed +/- 1%.

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