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GB/T 11047-2008 English PDF (GBT11047-2008)

GB/T 11047-2008 English PDF (GBT11047-2008)

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GB/T 11047-2008: Textiles -- Evaluation for the snagging degree of fabrics -- Mace test method

The standard specifies test methods and evaluation indicators for using mace test method to measure the snagging performance of fabrics. This Standard applies to knitted and woven fabrics and other snagging-prone fabrics, especially to chemical filament and its textured yarn fabrics. This Standard does not apply to mesh structure fabrics, non-woven fabrics and tufted fabrics.
GB/T 11047-2008
ICS 59.080.30
W 04
NATIONAL STANDARD
OF THE PEOPLE REPUBLIC OF CHINA
Replacing GB/T 11047-1989
Textiles - Evaluation for the snagging performance of
fabrics -
Mace test method
ISSUED ON. JUNE 18, 2008
IMPLEMENTED ON. MARCH 1, 2009
Issued by.
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 4
4 Principle ... 5
5 Instruments and auxiliary materials ... 5
6 Humidifying and standard atmosphere for the test ... 7
7 Test sample ... 7
8 Test procedures ... 8
9 Ratings and test results ... 8
10 Evaluation of the snagging performance ... 10
11 Test report ... 10
Annex A (Normative) Instrument calibration ... 11
Foreword
This Standard is the revision to GB /T 11047-1989 Fabric Snagging Test Method. Compared with GB/T 11047-1989, the major changes of this Standard are as follows. - The name of the standard was changed to ?€?Textiles - Evaluation for the snagging performance of fabrics - Mace test method";
- Relevant provisions in Method B (syringe method) were deleted;
- Terms such as small snagging, middle snagging, long snagging, warp test and weft test were deleted; - Sample in Chapter 6 and test sample in Chapter 8 were combined (see Chapter 7); - Chapter 9 and Annex A are incorporated into Chapter 5 (see 5.1 and 5.3); - Snagging state description was added, and the rating method was changed from sample comparison rating to visual description rating (see 9.5);
- Evaluation provisions of snagging performance were added (see Chapter 10); - Sample cutting drawing in Annex C was included into the chapter of sample (see 7.3). This Standard shall replace GB/T 11047-1989, from the date of implementation. Annex A of this Standard is normative annex.
This Standard was proposed by China Textile Industry Association.
This Standard is under the jurisdiction of the Basic Standard Branch of National Technical Committee of Textiles Standardization Administration of China (SAC/TC 209/SC 1).
The responsible drafting organization is National Textile Products Quality Supervision and Inspection Center.
The chief drafting staffs of this Standard. Li Xiaowen, Wang Baojun, and Cai Qianhong. This Standard replaces the following historical edition.
-GB/T 11047-1989.
Textiles - Evaluation for the snagging performance of fabrics -
Mace test method
1 Scope
The standard specifies test methods and evaluation indicators for using mace test method to measure the snagging performance of fabrics.
This Standard applies to knitted and woven fabrics and other snagging-prone fabrics, especially to chemical filament and its textured yarn fabrics.
This Standard does not apply to mesh structure fabrics, non-woven fabrics and tufted fabrics. 2 Normative references
The provisions contained in the following documents become part of this Standard when they are quoted herein. For the dated documents so quoted, all the modifications (excluding corrections) or revisions made thereafter shall not be applicable to this Standard. For the undated documents so quoted, the latest editions shall be applicable to this Standard.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing (GB/T 6529-2008, ISO 139. 2005, MOD)
3 Terms and definitions
For the purpose of this Standard, the following terms and definitions shall apply. 3.1
Snagging
The coil, fiber (bundle) ring-shaped, fluff or other scraggy defects which are formed when the yarn or fiber of the fabric is snagged by sharp objects or ticked up and floated on the surface of the fabric. 3.2
Snagging lenght
The length from the end of the snagging to the fabric surface;
3.3
Tight yarn (tight striation)
When a certain part of yarn of the fabric is hooked to form snagging, the part left in the fabric is straightened and is significantly tighter than its adjacent yarn, so that the wrinkles and streaks are formed at both ends or lateral side of the snagging.
4 Principle
The cylindrical sample is tricked on the drum; the mace suspended with a chain is placed on the surface of the sample. When the drum rotates at a constant speed, the mace randomly flips and jumps on the surface of the sample, and hooks the sample, snagging is produced on the test sample. After a predetermined number of rotations, the snagging degree of the test sample is evaluated by comparing with standard sample.
5 Instruments and auxiliary materials
5.1 Mace snagging instrument
Mace snagging instrument shall meet the following conditions, the structure is shown in Figure 1 (the calibration of the instrument is based on Annex A).
- Hanging place at the upper end of the chain shall be able to move freely. - The distance between the mace (ball diameter ??32mm) and the guide rod (i.e. the length of chain between the mace and the guide rod) is 45mm.
- 11 carbon tungsten needles are implanted with equidistance on the mace, with the total mass of (160??10) g. Needle nails shall be intact. Burrs, if any, shall be removed, and if there is any damage, it shall be replaced.
- Exposed length of needle is 10mm, and tip radius is R0.13mm.
Drum diameter is ??82mm, width is 210mm, in which the thickness of external wrapping rubber is 3mm; the rotational speed of the drum is (60 ?? 2) r/ min.
-The thickness of the felt is 3mm-3.2mm, the width is 165mm.
-Guide rod?€?s working width is 125mm.
Note. a similar device with the same effect may be used.
Unit is in mm
Annex A
(Normative)
Instrument calibration
A.1 Snagging instrument shall be calibrated by using the reference fabric. A.2 The selection of the reference fabric. Each laboratory shall select at least three fabrics (knitted or woven) with the snagging rating within the range of 2-4 as the reference fabrics, and keep certain amount of them. The shape of the snagging of the reference fabric shall ensure the easy rating, while its own snagging performance is uniform and stable. If the warp and weft snagging rating difference of reference fabrics is significant (more than one), it may also use two reference fabrics. A.3 Instrument calibration. Under the specified parameters conditions, measure the snagging rating of the reference fabric, if two-thirds of the differences between the measured rating and the initial rating are over ?? 0.5, the instrument shall be adjusted and checked.
A.4 Calibration period. If the instrument is often used, the instrument can be calibrated regularly; if not, the instrument shall be calibrated before use each time.

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