GB/T 28466-2012 English PDF (GBT28466-2012)

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GB/T 28466-2012: Polyester filament embroidery threads
GB/T 28466-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.20
W 58
Polyester filament embroidery threads
涤纶长丝绣花线
ISSUED ON: JUNE 29, 2012
IMPLEMENTED ON: DECEMBER 01, 2012
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Classification ... 5 
4 Requirements ... 5 
5 Grading rules ... 7 
6 Test methods ... 7 
7 Acceptance rules ... 9 
8 Packaging, marks, storage and transportation ... 10 
Annex A (informative) Reference values of twist degree and filament cross
section of polyester filament embroidery threads ... 11 
Polyester filament embroidery threads
1 Scope
This Standard specifies classification, requirements, grading rules, test
methods, acceptance rules as well as packaging, marks, storage and
transportation for polyester filament embroidery threads.
This Standard is applicable to polyester filament embroidery threads.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 250, Textiles - Tests for colour fastness - Grey scale for assessing
change in colour
GB/T 251, Textiles - Tests for colour fastness - Grey scale for assessing
staining
GB/T 3916, Textiles - Yarns from packages - Determination of single-end
breaking force and elongation at break
GB/T 3920, Textiles - Tests for colour fastness - Colour fastness to rubbing
GB/T 3921-2008, Textiles - Tests for colour fastness - Colour fastness to
washing with soap or soap and soda
GB/T 4743-2009, Textiles - Yarn from packages - Determination of linear
density (mass per unit length) by the skein method
GB 5296.4, Instructions for use of products of consumer interest - Part 4:
Textiles and apparel
GB/T 6152-1997, Textiles - Tests for colour fastness - Colour fastness to hot
pressing
GB 18401, National general safety technical code for textile products
The test method of linear density is carried out according to procedure 3 in GB/T
4743-2009. The linear density deviation rate is calculated according to formula
(1). The result retains 2 significant digits.
Where,
DT - Linear density deviation rate, %;
Tt - Actual linear density, in tex;
T0 - Nominal linear density, in tex.
6.2 Tests of single thread breaking strength and variation coefficient of
single thread breaking strength
According to GB/T 3916.
6.3 Length test
6.3.1 The length measuring device used for length test shall meet the
requirements of GB/T 4743.
6.3.2 When testing the length, the pre-tension of single thread is
(0.5±0.1)cN/tex.
6.3.3 When the sample is on the length gauge, after every 100m, it shall be set
aside and then continue shaking until all is done. If it is less than 1m long, use
a meter ruler to measure, to the nearest of 0.01m.
6.3.4 The measured length shall be expressed as the arithmetic average of all
test values of the sample. Round the calculation result to one decimal place.
6.4 Test of color fastness to soaping
According to the provisions of test method C (3) in GB/T 3921-2008.
6.5 Test for color fastness to rubbing
According to GB/T 3920.
6.6 Test of color fastness to heat pressing
According to dry pression at a temperature of (150±2)°C in GB/T 6152-1997.
6.7 Test method for the number of knots
7.2 Evaluation of results
7.2.1 The internal quality shall meet the requirements of 4.2 and 4.3. If there is
any non-conformity in the inherent quality, the same quantity of products can
be re-inspected. The re-inspection result is the final result of the batch of
products.
7.2.2 The appearance quality shall meet the requirements of 4.4. If the
appearance quality does not meet the rate of 5% or less, the products that do
not meet the requirements shall be replaced on site. When the non-conformity
rate exceeds 5% and does not exceed 7%, one re-inspection is allowed. If it
still exceeds 5% after re-inspection, then this batch of finished products shall
be rearranged. Only the products that pass the re-inspection shall be allowed
to leave factory. If the non-conformity rate exceeds 7%, the product will be
returned.
8 Packaging, marks, storage and transportation
8.1 Packaging
Products are packed in boxes according to different colors, varieties,
specifications, batch numbers and grades. Mixed packing is prohibited.
8.2 Marks
8.2.1 The marks on the packaging shall be specific, clear, complete with items,
easy to identify, according to GB 5296.4.
8.2.2 The mark shall indicate that the product meets the category of GB 18401.
8.3 Transportation
The product shall be tightly covered during transportation. The product cannot
be exposed to rain, moisture, sun exposure and high temperature to prevent
deterioration.
8.4 Storage
Products shall be stacked in a dry, clean and ventilated place. And keep them
at a distance of 5cm or more from the foundation and 10cm or more of space.
Do a good job of ventilation and moisture dissipation to prevent moisture.