GB/T 21331-2021 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 21331-2021 | English | 170 |
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Fluff pulp
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| GB/T 21331-2008 | English | 85 |
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Fluff pulp
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GB/T 21331-2021: Fluff pulp---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/GBT21331-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 85.040
CCS Y 31
Replacing GB/T 21331-2008
Issued on. MARCH 09, 2021
Implemented on. APRIL 01, 2022
Issued by. State Administration for Market Regulation;
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... 6
4 Product classification... 6
5 Technical requirements... 6
6 Test methods... 7
7 Inspection rules... 9
8 Marks, packaging, transportation and storage... 10
Annex A (normative) Dispersion method for fluff pulp board... 12
Annex B (normative) Determination of dry bulkiness, water absorption time and
water absorption amount of fluff pulp... 14
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2020
“Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents”.
This Standard replaces GB/T 21331-2008 “Fluff pulp”. Compared with GB/T
21331-2008, in addition to structural adjustments and editorial changes, the
main technical changes in this Standard are as follows.
a) deleted GB/T 7979 as a reference; added GB/T 22804, GB/T 22902, GB/T
24991, GB/T 24992, GB/T 24997, GB/T 27741-2018, GB/T 34845 as
references;
b) deleted product levels;
c) modified D65 brightness, tightness, burst resistance, dry bulkiness, water
absorption time, water absorption, and dustiness requirements (see 5.1 of
this Edition, 5.1 of Edition 2008);
d) added footnotes to Table 1 to make a supplementary description of the
requirements of the fluff pulp D65 brightness and burst resistance
indicator;
e) modified the dichloromethane extract indicator to acetone extract;
accordingly revised the requirements and test methods (see 5.1 and 6.11
of this Edition, 5.1 and 6.6 of Edition 2008);
f) added the requirements for the content of mobile fluorescent substances,
absorbable organic halogens (AOX), lead (Pb), arsenic (As), cadmium
(Cd), and mercury (Hg) and corresponding measurement methods (see
5.1 and Clause 6 of this Edition);
g) modified "sanitation indicator" to "microbiological indicator" (see 5.2 and
6.16 of this Edition, 5.2 and 6.11 of Edition 2008);
h) modified the acceptance quality limit (AQL) in the inspection rules
accordingly based on the revised indicators in Clause 5;
i) added the note for dispersion method of fluff pulp board (see A.3 of this
Edition);
j) modified test methods for dry bulkiness, water absorption time and water
absorption amount (see Annex B of this Edition, Annex B of Edition 2008).
Attention is drawn to the possibility that some of the elements of this Standard
may be the subject of patent rights. The issuing authority shall not be held
responsible for identifying any or all such patent rights.
This Standard was proposed by China National Light Industry Council.
This Standard shall be under the jurisdiction of National Technical Committee
on Paper Industry of Standardization Administration of China (SAC/TC 141).
The drafting organizations of this Standard. China Light (Jinjiang) Hygiene
Products Research Co., Ltd., National Paper Quality Supervision and
Inspection Center, China Pulp and Paper Research Institute Co., Ltd., Internet
International Paper Investment (Shanghai) Co., Ltd., Hangzhou Reliable Care
Products Co., Ltd., Fujian Hengan Household Articles Co., Ltd., Georgia Pacific
Jiping (Shanghai) Trading Co., Ltd.
Main drafters of this Standard. Shen Zhenhuang, Luo Gai, Zhang Ruochen, Li
Jianyong, Tang Shengde, Zhang Yue, Yang Yang, Kong Songhua, Wu Xiaobiao.
Versions of standard substituted by this Standard are.
- GB/T 21331-2008 issued in 2008 for the first time;
- this is the first revision.
Fluff pulp
1 Scope
This Standard specifies the terms and definitions, product classification,
technical requirements, test methods, inspection rules and marks, packaging,
transportation, storage for fluff pulp.
This Standard is applicable to raw fluff pulp for the production of disposable
sanitary products.
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 451.2, Paper and board - Determination of grammage
GB/T 451.3, Paper and board - Determination of thickness
GB/T 462, Paper, board and pulp - Determination of moisture content of
analytical sample
GB/T 740, Pulps - Sampling for testing
GB/T 1539, Paperboard; Determination of bursting strength
GB/T 2828.1, Sampling procedures for inspection by attributea - Part 1.
Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot
inspection
GB/T 7974, Paper, board and pulps - Measurement of diffuse blue
reflectance factor - D65 brightness (Diff/Geometry, Outdoor daylight
conditions)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 treated fluff pulp
the fluff pulp that has been chemically treated and has significantly reduced
burst resistance
3.2 untreated pulp
the fluff pulp that has not been chemically treated
4 Product classification
Fluff pulp is divided into treated fluff pulp and untreated pulp according to
whether it has been chemically treated.
5 Technical requirements
5.1 The indicators of physical and chemical properties of fluff pulp shall meet
the requirements of Table 1.
5.2 The microbial indicator of fluff pulp follows the regulations of GB 15979.
5.3 The fluff pulp board shall not have metal impurities, sand and other foreign
objects that are visible to the naked eye. There are no obvious fiber bundles.
6 Test methods
6.1 Specimen extraction
The specimen is extracted according to GB/T 740.
6.2 Specimen handling and test conditions
6.3 Quantitative deviation
Quantitative deviation is determined according to GB/T 451.2.
6.4 Tightness
Tightness is measured according to GB/T 451.3.
6.5 Burst resistance
Burst strength is measured according to GB/T 1539.
6.6 D65 brightness
D65 brightness is measured according to GB/T 7974.
6.11 Acetone extract
Acetone extract is determined measured to GB/T 22902.
6.12 Absorbable organic halogen (AOX)
AOX is measured according to GB/T 34845.
6.14 Dustiness
Dustiness is determined according to GB/T 10740.When the test result of either
the laboratory paper test method or the pulp board test method is conforming,
the result is determined as conforming.
6.15 Delivery moisture
Delivery moisture is measured according to GB/T 462.
7 Inspection rules
7.1 The manufacturer shall ensure that the fluff pulp produced meets the
requirements of this Standard or the order contract.
7.2 If the microbiological indicators or raw materials are nonconforming, the
batch is determined to be nonconforming.
7.3 Sampling for product delivery inspection shall be carried out in accordance
with the provisions of GB/T 2828.1.The sample unit is roll or piece.
7.4 When sampling, the external packaging of the sample shall be checked first.
Then take a specimen from it for inspection.
7.5 Acceptability determination. The number of samples inspected for the first
time shall be equal to the first sample size given in the plan. If the number of
nonconforming products found in the first sample is less than or equal to the
first acceptance number, the batch shall be considered acceptable.
7.6 If the buyer has objections to the quality of the product, the batch of products
shall be sealed up and notified to the supplier within three months after arrival
(or as stipulated in the contract).
8 Marks, packaging, transportation and storage
8.1 Each batch of fluff pulp shall be marked with the product name,
implementation standard number, production date, batch number, manufacturer
name, manufacturer address, product specifications, product type and other
information, accompanying with a product certificate.
8.4 During the handling process, the products shall be handled with care, kept
from rain and moisture. They shall not be thrown away.
8.5 The products shall be properly stored in a dry, clean, non-toxic, odor-free,
and non-polluting warehouse.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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