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GB/T 21331-2021: Fluff pulp Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 21331: Historical versions
Similar standardsGB/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/GBT21331-2021GB 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 ContentsForeword... 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... 14ForewordThis 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 pulp1 ScopeThis 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 referencesThe 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 definitionsFor 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 treated4 Product classificationFluff pulp is divided into treated fluff pulp and untreated pulp according to whether it has been chemically treated.5 Technical requirements5.1 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 methods6.1 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 rules7.1 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 storage8.1 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. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 21331-2021 be delivered?Answer: The full copy PDF of English version of GB/T 21331-2021 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 21331-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 21331-2021_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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