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GB/T 16604-2017 (GB/T16604-2017)

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GB/T 16604-2017: PDF in English (GBT 16604-2017)
GB/T 16604-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.060.20
W 52
Replacing GB/T 16604-2008
Polyester Filament for Industry
涤纶工业长丝
ISSUED ON: DECEMBER 29, 2017
IMPLEMENTED ON: JULY 1, 2018
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 ... 5 
2 Normative References ... 5 
3 Terms and Definitions ... 5 
4 Classification and Identification ... 7 
5 Technical Requirements ... 8 
6 Test Methods ... 11 
7 Inspection Rules ... 16 
8 Marking, Packaging, Transportation and Storage ... 18 
Appendix A (normative) Appearance Requirements, Inspection and Evaluation
... 20 
Polyester Filament for Industry
1 Scope
This Standard specifies the terms and definitions, classification and identification,
technical requirements, test methods, inspection rules, marking, packaging,
transportation and storage of polyester filament for industry.
This Standard is applicable to polyester filament for industry with a linear density of
140 dtex ~ 9,000 dtex; other polyester filaments for industry may take this as a
reference.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 2828.1-2012 Sampling Procedures for Industry by Attribute - Part 1: Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 3291.1 Textiles - Terms of Textile Material Properties and Test - Part 1: Fiber and
Yarn
GB/T 3291.3 Textiles - Terms of Textile Material Properties and Test - Part 3: General
GB/T 4146 (all parts) Textiles - Man-made Fibers
GB/T 6502 Sampling Method of Man-made Filament Yarns
GB/T 8170-2008 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
GB/T 14343 Testing Method for Linear Density for Man-made Filament Yarns
GB/T 14344 Testing Method for Tensile of Man-made Filament Yarns
3 Terms and Definitions
What is defined in GB/T 3291.1, GB/T 3291.3 and GB/T 4146 (all parts), and the
following terms and definitions are applicable to this document.
0.01 cN/dtex) is not greater than 3.0%, and whose breaking tenacity is not less than
6.00 cN/dtex.
3.9 High-modulus Low-shrinkage (HMLS) Polyester Filament for Industry
High-modulus low-shrinkage polyester filament for industry refers to polyester filament
for industry characterized by the index of dimensional stability and not greater than 10.
3.10 High-tenacity and High-modulus Low-shrinkage (HTHMLS) Polyester
Filament for Industry
High-tenacity and high-modulus low-shrinkage polyester filament for industry refers to
polyester filament for industry characterized by the index of dimensional stability and
not greater than 10, and whose breaking tenacity is not less than 7.40 cN/dtex.
4 Classification and Identification
4.1 Classification
In accordance with product performance, polyester filament for industry may be divided
into three types: high-tenacity type, low-shrinkage type and high-modulus low-
shrinkage type. The subdivision of the various types is as follows:
a) High-tenacity products may be sub-divided into:
---Ultra-high-tenacity polyester filament for industry;
---High-tenacity polyester filament for industry;
---High-tenacity medium-shrinkage polyester filament for industry;
---High-tenacity low-shrinkage polyester filament for industry.
b) Low-shrinkage products may be sub-divided into:
---Medium-low-shrinkage polyester filament for industry;
---Low-shrinkage polyester filament for industry;
---Ultra-low-shrinkage polyester filament for industry.
c) High-modulus low-shrinkage products may be sub-divided into:
---High-modulus low-shrinkage polyester filament for industry;
---High-tenacity and high-modulus low-shrinkage polyester filament for
industry.
7.4.2 In accordance with the stipulations of GB/T 6502, from the same inspection batch,
randomly take 20 spools as laboratory samples for the various tests of physical
indicators. The appearance and spool weight of the laboratory samples being taken
shall comply with the corresponding grade.
7.4.3 Damaged packages shall not be taken.
7.5 Comprehensive Evaluation
7.5.1 The appearance inspection items shall comply with the stipulations of 5.2 and be
evaluated spool by spool.
7.5.2 The determined values or calculated values of the various performance
inspection items shall be compared with the limit values of the performance indicators
in Table 1 ~ Table 3 in accordance with the rounding-off comparison method in GB/T
8170-2008. In the end, the lowest grade in the performance items in the inspection
batch shall be determined as the grade of the batch of products.
7.6 Re-inspection Rules
7.6.1 General rules
Within 3 months after delivery to the demand-side, as acceptance inspection or if there
is an objection to the quality, a re-inspection may be requested. When more than one
third of the quantity of the batch of products has been used, re-inspection shall not be
requested. When the quality of the batch of products affects the quality of post-
processed products and causes severe losses, the demand-side and the supply-side
shall analyze the causes, clarify the responsibilities and negotiate about the disposal.
7.6.2 Inspection items
Same as 7.2.
7.6.3 Batching rules
Batching shall comply with the original production batch.
7.6.4 Stipulations of sampling
7.6.4.1 The appearance shall be in sampling inspection. In accordance with the batch
size and the stipulations of general inspection Level-II in Table 1 of GB/T 2828.1-2012,
determine the sample size (character code).
7.6.4.2 The laboratory samples of the performance inspection items shall be sampled
in accordance with the stipulations of 7.4.2.
7.6.5 Evaluation rules
7.6.5.1 Appearance
7.6.5.1.1 In accordance with the sample size in 7.6.3, and “one-time sampling scheme
of normal inspection” (AQL value is 4.0) in Table 2 of GB/T 2828.1-2012, determine the
number of accepted Ac and the number of rejected Re.
7.6.5.1.2 In accordance with the stipulations of 5.2, conduct the evaluation. When the
number of disqualified reels ≤ Ac, it shall be determined as the previous grade; when
the number of disqualified reels ≥ Re, then, it shall be determined as non-conforming
with the previous grade.
7.6.5.2 Evaluation of performance inspection items
In accordance with the stipulations of 7.5.2, evaluate the grade.
7.6.5.3 Comprehensive evaluation
In accordance with the lowest grade in 7.6.5.1.2 and 7.6.5.2, comprehensively
evaluate the grade of the production batch. If it is higher than or equal to the previous
grade, then, it shall be determined as conforming; if it is lower than the previous grade,
then, it shall be determined as non-conforming.
8 Marking, Packaging, Transportation and Storage
8.1 Marking
8.1.1 On both sides of the packaging box, the product name, specifications and grade
requested in Chapter 4 shall be marked in eye-catching colors.
8.1.2 The manufacturer’s identification shall be marked, such as: the manufacturer’s
name, batch number, net weight or gross weight, the number of internal reels, date of
production, serial number of the implemented standard, and detailed address.
8.1.3 The sole distributor’s identification shall be marked, such as: trade name,
trademark, identification mark, and detailed address, etc.
8.1.4 The marking shall indicate the requirements for moisture-proof and handling with
care.
8.2 Packaging
8.2.1 Each reel shall have a protective layer. In the packaging box, the supported reels
shall be positioned and fixed; the unsupported reels shall be protected from damage.
8.2.2 The size of reels in each packaging box should be uniform. Different varieties,
specifications, batch numbers and grades shall be separately packed.
A.2.3.1 Use the illuminometer to determine the illuminance at the working point.
A.2.3.2 With one rotation on the grading device, observe the two end faces and one
column surface of the reel.
A.2.3.3 Inspect each reel being inspected in accordance with the items requested in
A.1.2.
A.2.3.4 Inspect the broken filaments for the phenomenon that the yarns are fluffy, or
the broken filament end of the monofilament protrudes from the surface of the
multifilament and can be seen against the light.
A.2.3.5 Inspect oil stains on the surface, which shall be subject to oily filaments and
rusty filaments that can be seen in visual inspection, and stains that are difficult to
clean with water; calculate by the area.
A.2.3.6 Inspect the cobweb filament (over-thrown filament), which shall be calculated
by the number of filaments on both ends of the reel that deviate from the normal
winding track.
A.2.3.7 Weigh the mass of the reel; deduct the already-known tare mass; the net mass
is the spool weight, accurate to 0.5%.
A.2.3.8 Record the results.
A.3 Evaluation Rules
A.3.1 Broken filament
Broken filament refers to the phenomenon that the yarns are fluffy, or the broken
filament end of the monofilament protrudes from the surface of the multifilament.
Inspect the entire surface of the reel. It shall be determined by the cumulative number
of broken filaments per spool.
Loop filament (monofilament unbroken) is also a type of broken filament. It refers to
single filaments exposed out of the surface of the reel in an arc shape and with a height
greater than 2 mm. During inspection, it shall be included in the number of broken
filaments.
A.3.2 Surface oil stain
Surface oil stain refers to oily filaments, rusty filaments and stains that cannot be
washed with water, or man-made stains on the surface of the reel. It shall be
determined by the total area of contamination on the surface of the reeled filaments.
A.3.3 Cobweb filament
Cobweb filament has tows that deviate from the normal winding track and with a length
......
 
(Above excerpt was released on 2020-11-13, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/GBT16604-2017