GB/T 4802.2-2008 PDF English (GB/T 4802.2-1997: Older version)
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Textiles -- Determination of fabric propensity to surface fuzzing and to pilling -- Part 2: Modified Martindale method
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| GB/T 4802.2-1997 | English | 199 |
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Textiles--Assessing the rate of pilling of fabrics--Martindale method
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| GB/T 4802.2-1984 | English | RFQ |
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Textile fabrics--Test method for assessing the rate of pilling--Martindale type tester method
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GB/T 4802.2-2008: PDF in English (GBT 4802.2-2008) GB/T 4802.2-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W04
Replacing GB/T 4802.2-1997
Textiles - Determination of fabric propensity to surface
fuzzing and to pilling –
Part 2. Modified Martindale method
(ISO 12945-2.2000, MOD)
ISSUED ON. JUNE 18, 2008
IMPLEMENTED ON. MARCH 1, 2009
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 Auxiliary materials ... 11
7 Conditioning and testing atmosphere ... 12
8 Preparation of test specimens ... 12
9 Procedure ... 12
10 Assessment of fuzzing and/or pilling ... 14
11 Results ... 15
12 Test report ... 15
Annex A ... 16
Foreword
GB/T 4802 " Textiles - Determination of fabric propensity to surface fuzzing and to
pilling" is divided into 4 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 2 of GB/T 4802.
This Part is modified in relation to ISO 12945-2.2000 Textiles - Determination of fabric
propensity to surface fuzzing and to pilling - Part 2. Modified Martindale method
(English edition).
Differences from ISO 19.945-2.2000 are as follows.
— Relative provisions on grade and comparison are added in clause 10.
— Article “j) after pretreatment, compare the sample with the samples that are not
treated; the assess grading of fuzzing, pilling or pills;” is added in clause 12. The
serial numbers after that are increased sequentially.
This Part replaces GB/T 4802.2-1997 "Textiles - Determination of fabric propensity to
surface fuzzing and to pilling - Part 2. Modified Martindale method “Differences from
GB/T 4802.2 1997.
1. Standard name is modified as " Textiles - Determination of fabric propensity to
surface fuzzing and to pilling - Part 2. Modified Martindale method".
2. Provisions in Scope does not specify the applicable fabric.
3. Clause 3 Terminology and Definition is added.
4. Description of the modified Martindale abrasion testing machine is added; and
diagrams of devices such as pilling table, clamping ring, specimen holder body,
additional loading weight and auxiliary device are added. Sample size in the
sample holder is adjusted correspondingly; the diameter is changed from 40mm
to 50140 mm.
5. Grade-box’s specific requirements are added and illustrated in figure.
6. The pad in specimen holder is change from polyurethane foam to weaving felt
fabric; The corresponding clauses that whether use pad according to sample
weight are deleted;
7. Abradant is changed from single test fabric to 2 abradants – the fabric under test
AND the wool standard abradant; and wool standard abradant shall be adopted
for decorative fabric.
8. Sample quantity is change from 4 sets to 3 sets of specimens.
9. As for loading, single mass loading is changed to 2 kinds of mass loadings that
are chosen according to test fabric application.
10. Provision of conducting grade-assessment after 1000 times of abrasion is
deleted; test procedure of adopting stages to conduct the abrasion and
grade-assessment is specified;
11. State description of fuzzing and pilling of specimens is added;
grade-assessment mode is changed FROM comparing samples for
grade-assessment INTO according to visual description for
grade-assessment;
12. Annex A "Pilling experimentation classification” is added.
Annex A of this Part is the normative.
This Part was proposed by China Textile General Association.
This Part shall be under the jurisdiction of Basic Standard Branch (SAC/TC 209/SC 1)
of National Textile Standardization Technical Committee.
Drafting organizations of this Part. Zhong Fang Biao (Beijing) Inspection Certification
Center Co., Ltd. and Ningbo Textile Instrument Plant.
Chief drafting staffs of this Part. Zhou Shixiang, Hu Junwei.
The previous editions replaced by this Part are as follows.
— GB 4802.2-1984, GB/T 4802.2-1997.
Textiles - Determination of fabric propensity to surface
fuzzing and to pilling –
Part 2. Modified Martindale method
1 Scope
This Part of GB/T 4802 specifies a method for determination of the resistance to
pilling and surface change of textile fabrics using a modified Martindale method.
2 Normative references
The following normative documents contain the provisions which, through reference in
this text, constitute the provisions of this Part of GB/T 4802. For dated references, the
subsequent amendments or revisions of these publications do not apply. However,
parties who enter into an agreement based on this Part of GB/T 4802 are encouraged
to investigate the possibility of applying the most recent editions of the normative
documents indicated below. For undated references, the latest edition of the
normative document referred to applies.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing (GB/T
6.529-2008, ISO 139.2005, MOD)
GB/T 21196.1 Textiles - Determination of the abrasion resistance of fabrics by the
Martindale method - Part 1. Martindale abrasion testing apparatus (ISO 12947-1.1998,
MOD)
3 Terms and definitions
For the purposes of this Part of GB/T 4802, the following terms and definitions apply.
3.1 fuzzing
Roughing up of the surface fibers and/or teasing out of the fibers from the fabric,
producing a visible surface change.
NOTE. This change can occur during washing, dry cleaning and/or wearing.
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.
NOTE. This change can occur during washing, dry cleaning and/or wearing.
3.3 pilling
Generation of pills over the surface of the fabric.
3.4 pilling rub
Number of revolutions of the two outer drives of the modified Martindale abrasion
machine.
3.5 pilling cycle
Completion of the translational movements tracing a Lissajous figure comprising 16
rubs, i.e. 16 revolutions of the two outer drives and 15 revolutions of the inner drive of
the Martindale abrasion tester.
4 Principle
A circular test specimen is passed over a friction surface comprising the same fabric
or, when relevant, a wool abradant fabric, at a defined force in the form of a Lissajous
figure, with the test specimen able to rotate easily around an axis through its centre,
perpendicular to the plane of the test specimen. Fuzzing and pilling are assessed
visually after defined stages of rub testing.
5 Apparatus
5.1 Martindale abrasion testing machine
It is described in GB/T 21196.1, modified in accordance with 5.2.
The test apparatus consists of a base plate carrying the pilling tables and drive
mechanism. The drive mechanism consists of two outer drives and an inner drive
which cause the specimen holder guide plate to trace a Lissajous figure.
The specimen holder guide plate is moved horizontally by the drive mechanism in
such a way that every point of the guide plate describes the same Lissajous figure.
The Lissajous movement changes from a circle to gradually narrowing ellipses, until it
becomes a straight line, from which progressively widening ellipses develop in a
diagonally opposite direction before the pattern is repeated.
The specimen holder guide plate is fitted with bearing housings and low friction
7 Conditioning and testing atmosphere
The standard temperate atmosphere for conditioning and testing textiles as defined in
GB/T 6529 shall be used.
8 Preparation of test specimens
8.1 Pre-treatment
Unless otherwise agreed, launder or dry clean the sample using a method agreed
upon by the interested parties.
NOTE. The procedures described in GB/T 8629 or GB/T 19981.1 or GB/T 19981.2 may be suitable.
8.2 Sampling
NOTE. Test specimens should be randomly placed with none of the test specimens having common warp or weft
threads.
The test specimen for the specimen holder is a disc of ( 50140 ) mm diameter. The test
specimen for the pilling table can optionally be ( 50140 ) mm in diameter or (150 ± 2)
mm in both the length and width.
Throughout sampling and specimen preparation particular care shall be taken that
during handling the absolute minimum of tension is applied to avoid any abnormal
elongation of the textile fabric.
8.3 Number of test specimens
At least three sets of specimens are required where one complete set comprises one
test specimen for the specimen holder and one for the pilling table. Where the wool
abradant fabric is used on the pilling table, at least three specimens of t...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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