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GB/T 6502-2008 English PDF (GBT6502-2008)

GB/T 6502-2008 English PDF (GBT6502-2008)

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GB/T 6502-2008: Sampling method of man-made filament yarns
This Standard specifies the method of taking batch samples, laboratory samples and test specimens from the entire batch of man-made filament yarns. This Standard applies to the sampling of man-made filament yarns such as polyester (polyester fibre), polyamide (chinlon), polypropylene (polypropylene fibre), and cellulose fibre.
GB/T 6502-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 59.060.01
W 50
Sampling method of man-made filament yarns
(BISFA-2004, Testing methods for polyester filament yarns,
BISFA-2004, Testing methods for polyamide filament yarns, NEQ)
ISSUED ON: JUNE 18, 2008
IMPLEMENTED ON: MARCH 01, 2009
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 Terms and definitions ... 4
4 Principle ... 5
5 Sampling quantity ... 5
6 Sampling steps ... 5
Sampling method of man-made filament yarns
1 Scope
This Standard specifies the method of taking batch samples, laboratory
samples and test specimens from the entire batch of man-made filament yarns. This Standard applies to the sampling of man-made filament yarns such as polyester (polyester fibre), polyamide (chinlon), polypropylene (polypropylene fibre), and cellulose fibre.
2 Normative references
The terms in the following documents become the terms of this Standard by reference to this Standard. For dated references, all subsequent amendments (not including errata content) or revisions do not apply to this standard. However, parties to agreements that are based on this Standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest edition applies to this Standard.
GB/T 3291.3, Textiles - Terms of textile material properties and test - Part 3: General
GB/T 10111, Generation of random numbers and procedures applied to
sampling inspection for product quality
3 Terms and definitions
Terms and definitions determined by GB/T 3291.3, and the following ones are applicable to this Standard.
3.1 Yarn package
In order to facilitate processing, storage and transportation, several lengths of chemical fibre are packed into a suitable form, which is referred to as a package. There are two types of packages: unsupported (such as skein) and supported (such as cheese, paper cop).
6.1.1 Lot sample
6.1.1.1 Mark continuous integers on the batch packages; determine the number of packages to be extracted for the first time according to Table 1; then, use a computer or the GB/T 10111 standard to determine the number of packages to be drawn, so as to complete the first package drawing. When drawing, the packages that have been damp or damaged during transportation and handling shall be removed.
6.1.1.2 Take several packages from the packages of the first time to form a batch of samples; mark them and record them; use the rest as spare samples. When it is necessary to increase the number of batch samples, it shall be taken from the spare samples.
6.1.1.3 When sampling for the determination of commercial quality and
performance items, the same lot samples shall be used.
6.1.2 Laboratory samples
6.1.2.1 Take laboratory samples that are used for determining commercial quality
According to Table 1, take a specified number of packages from the lot samples as laboratory samples. When sampling, pay attention to exclude packages of abnormal appearance such as moisture and damage which is caused during
transportation and handling.
6.1.2.2 Take laboratory samples that are used for determining
performance items
According to Table 1, take a specified number of packages from the lot samples as laboratory samples. When sampling, pay attention to exclude packages of abnormal appearance such as moisture and damage which is caused during
transportation and handling.
6.1.3 Specimen
From each package of laboratory samples, randomly take a number of samples of the specified length as test samples according to the provisions of the relevant method standards.
6.2 Online product sampling method
6.2.1 Lot sample
Calculate the corresponding lot sample package number according to the
inspection lot time; determine the number of to-be-taken lot samples for each
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