GB/T 4802.1-2008 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 4802.1-2008 | English | 85 |
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Textiles -- Determination of fabric propensity for fuzzing and pilling -- Part 1: Circular locus method
| Valid |
| GB/T 4802.1-1997 | English | 279 |
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Textiles--Assessing the rate of pilling of fabrics--Circular locus method
| Obsolete |
| GB/T 4802.1-1984 | English | RFQ |
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Textile fabrics--Test method for assessing the rate of pilling--Circular locus pilling tester method
| Obsolete |
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GB/T 4802.1-2008: Textiles -- Determination of fabric propensity for fuzzing and pilling -- Part 1: Circular locus method
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT4802.1-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 04
Replacing GB/T 4802.1-1997
Textiles - Determination of Fabric Propensity to
Surface Fuzzing and to Pilling –
Part 1.Circular Locus Method
Issued on. JUNE 18, 2008
Implemented on. MARCH 1, 2010
Issued by. General Administration for Quality Supervision, Inspection
and Quarantine (AQSIQ);
Standardization Administration (SAC) of the People’s
Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Principle... 6
5 Apparatus... 6
6 Atmosphere for Conditioning and Testing... 7
7 Specimen Preparation... 7
8 Test Procedures... 8
9 Assessment of Fuzzing and Pilling... 9
10 Result... 10
11 Test Report... 10
Annex A... 12
Bibliography... 14
Foreword
GB/T 4802 "Textiles - Determination of fabric propensity to surface fuzzing and to
pilling" is divided into four parts.
— Part 1.Circular locus method;
— Part 2.Modified Martindale method;
— Part 3.Pilling box method;
— Part 4.Random rolling method.
This Part is part 1 of GB/T 4802.
This Part replaces GB/T 4802.1-1997 "Textiles - Assessing the rate of pilling of fabrics
- Circular locus method”. The main differences of this Part with GB/T 4802.1-1997 are
as follows.
— Standard name is revised as "Textiles - Determination of fabric propensity to
surface fuzzing and to pilling - Part 1.Circular locus method”;
— The applicable fabrics are not specified in Scope;
— Revise and supplement the terms and definitions in Chapter 3;
— Specify the specific requirements of grade-assessment box and explain them in
diagram;
— Add provisions of specimen pretreatment;
— Change the corresponding fabric types of each kind of test conditions into the
applicable fabrics AND make examples; and supplement is made at the same
time;
— Add the state description of specimen propensity to surface fuzzing and to pilling;
and change grade-assessment methods from comparison specimen for
grade-assessment into the grade-assessment according to visual description;
— Revise the methods for grade-assessment and expression of results.
Annex A of this Part is informative.
This Part was proposed by China National Textile and Apparel Council.
This Part shall be under the jurisdiction of Basic Standard Branch (SAC/TC 209/SC 1)
of National Textile Standardization Technical Committee.
National Textile Quality Supervision Testing Center is responsible for drafting this Part.
Chief drafting staffs of this Part. Wang Baojun and Ren Hening.
The previous editions replaced by this Part are as follows.
— GB 4802.1-1984, GB/T 4802.1-1997.
Textiles - Determination of Fabric Propensity to Surface
Fuzzing and to Pilling - Part 1.Circular Locus Method
1 Scope
This Part of GB/T 4802 specifies methods for determination of fabric propensity to
surface fuzzing, to pilling and superficial alteration in circular locus method.
2 Normative References
The following standards contain the provisions which, through reference in this Part of
GB/T 4802, constitute the provisions of this Part. For dated reference, the subsequent
amendments (excluding correction) or revisions of these publications do not apply.
However, the parties who enter into an agreement according to this Part are
encouraged to study whether the latest editions of these references are applicable.
For undated references, the latest edition of the normative document is applicable to
this Part.
GB/T 6529 Standard atmospheres for textiles conditioning and testing (GB/T
6529-2008, ISO 139.2005, MOD)
3 Terms and Definitions
The following terms and definitions are applicable to this Part of GB/T 4802.
3.1
Fuzzing
Roughing up of the surface fibers and/or teasing out of the fibers from the fabric,
producing a visible surface change.
3.2
Pills
Entangling of fibers into balls (pills) which stand proud of the fabric and are of such
density that light will not penetrate and will cast a shadow.
4 Principle
According to the specified method and test parameters, adopt nylon brush and fabric
abradant or just use fabric abradant to rub specimen to fuzzing and pilling.
5 Apparatus
5.1 Circular locus pilling tester
The clip of the specimen is in relative vertical motion with whet bench; and all its
movement is (40±1)mm;
5.2 Abradant
5.2.1 Nylon brush. the diameter of nylon wires is 0.3mm; the rigid of nylon wires shall
be uniform; the pore diameter of setting up silk is 4.5mm, each hole shall have 150
nylon wires and the hole distance is 7mm;
5.2.2 Abradant for fabric. 2201 all-wool gabardine with tissue of 2/2 right diagonal
grain, linear density of 19.6 tex × 2, twist of Z 625—S 700, density of 445
bases/10cm× 244 bases/10cm, and mass of unit-area of 305g/m2.
5.3 The mass area ratio of poly-foam gasket is about 270g/m2, its thickness is about
8mm; the diameter of the gasket of specimen is about 105mm.
5.5 Assessment box
Use light in white fluorescent tube to ensure of uniform lighting on the entire width of
the specimen; and the observer shall be made not to directly view the ray.
6 Atmosphere for Conditioning and Testing
Atmosphere for conditioning and testing shall adopt the specified standard
atmosphere in GB/T 6529.
7 Specimen Preparation
7.1 Preprocessing
If preprocessing is required, the method on mutual agreement may be adopted for
watering and dry cleaning the specimen.
7.2 Specimen
Cut five circular specimens from the samples; the diameter of each specimen is
(113±0.5) mm.
7.3 Conditioning of the specimen
In the conditioning balance in the specified standard atmosphere in Chapter 6,
generally conditioning shall be for 16h at least, and then conduct an experiment under
the same atmospheric conditions.
8 Test Procedures
8.1 Before the test, the apparatus shall be maintained to be horizontal and nylon
brush shall be clean; adequate solvent (such as dimethyl ketone) may be used for
clearing the brush.
8.2 Install respectively the poly-foam gasket, specimen and abradant for fabric on the
test clip and whet bench; specimen shall be with the front face outwards.
8.3 Select test parameters for conducting an experiment according to the fabric types
specified in Table 1.
8.4 Take down the specimen and prepare for grade-assessment; pay attention not to
make test surface of any external influence.
9 Assessment of Fuzzing and Pilling
Grade-assessment box shall be placed in dark room.
Place a piece of already-tested specimen and a piece of untested specimen side by
side in the middle of the specimen board in grade-assessment box, along fabric’s
longitudinal direction; if required, proper method may be adopted to fix them at
appropriate position; the already tested specimen shall be placed in left while the
untested specimen shall be placed in right.
10 Result
Record the grade of each piece of specimen; the grade-assessment result of a single
person is the average value to all the specimens.
11 Test Report
The test report shall cover the following contents..
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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