GB/T 22875-2018 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 22875-2018: Super-absorbent polymer for sanitary towel and diapers 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 22875: Historical versions
Similar standardsGB/T 22875-2018: Super-absorbent polymer for sanitary towel and diapers---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/GBT22875-2018GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 85.080 Y 39 Replacing GB/T 22875-2008, GB/T 22905-2008 Super-absorbent polymer for sanitary towel and diapers Issued on. JUNE 07, 2018 Implemented on. JANUARY 01, 2019 Issued by. State Market Regulatory Administration; General Administration of Quality Supervision, Inspection and Quarantine. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Product classification... 5 4 Requirements... 6 5 Test methods... 6 6 Inspection rules... 8 7 Marking, packaging, transportation, storage... 8 Appendix A (Normative) Determination of residual monomers (acrylic acid).. 10 Appendix B (Normative) Determination of volatile content... 13 Appendix C (Normative) Determination of pH... 14 Appendix D (Normative) Determination of distribution of particle size... 16 Appendix E (Normative) Determination of density... 18 Appendix F (Normative) Determination of yellowing value... 20 Appendix G (Normative) Determination of absorption speed... 22 Appendix H (Normative) Determination of absorption amount and water retention... 23 Appendix I (Normative) Determination of absorption amount under pressure 26 Appendix J (Normative) Determination of extractable content... 29 Appendix K (Normative) Formulation and physical properties of standard synthetic test solutions... 33ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 22875-2008 “Super-absorbent polymer for sanitary towel” and GB/T 22905-2008 “Super-absorbent polymer for diaper”. As compared with GB/T 22875-2008 and GB/T 22905-2008, the main changes of this standard are as follows. - INTEGRATE the two standard contents of GB/T 22875-2008 and GB/T 22905-2008, MODIFY the standard name; - ADD the product classification; - ADJUST the index requirements and determination methods of residual monomer (acrylic acid); - ADJUST the method for determining the volatile content; - ADJUST the absorption speed indicator requirements; - ADJUST the size of the pressure absorption test device; - ADD the yellowing value, extractables content index and determination method; - ADD the sampling requirements. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This standard was proposed by the China National Light Industry Council. This standard shall be under the jurisdiction of the National Paper Industry Standardization Technical Committee (SAC/TC 141). Drafting organizations of this standard. China Pulp and Paper Research Institute, Zhejiang Satellite New Material Technology Co., Ltd., Yixing Dansen Technology Co., Ltd., Sumitomo Refined Trade (Shanghai) Co., Ltd., Nishao Chemical (Zhangjiagang) Co., Ltd., Banglida (Fujian) New Materials Co., Ltd., Sandaya Fine Chemicals (Nantong) Co., Ltd., Yangzi Petrochemical-BASF Co., Ltd., LG Chemical (China) Investment Co., Ltd., Wanhua Chemical Group Co., Ltd., National Paper Quality Supervision and Inspection center. The main drafters of this standard. Gao Jun, Qiu Wenlun, Li Defei. This standard replaces the standard previously issued as follows. - GB/T 22875-2008; - GB/T 22905-2008. Super-absorbent polymer for sanitary towel and diapers1 ScopeThis standard specifies the product classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of polyacrylate super-absorbent polymers for sanitary towels and diapers. This standard applies to polyacrylate super-absorbent polymers which are used by all kinds of paper diapers (sheets, pads) and sanitary towels (pads). The super-absorbent polymers which are used by other disposable sanitary products may make reference to this standard.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. GB/T 6682 Water for analytical laboratory use - Specification and test methods GB/T 7974 Paper, board and pulps - Measurement of diffuse blue reflectance factor - D65 brightness (Diff/Geometry, outdoor daylight conditions)3 Product classificationThe super-absorbent polymer is divided into the super-absorbent polymer for paper diapers (sheets, pads) and the super-absorbent polymer for the sanitary towels (pads) in accordance with the use of the product.4 RequirementsThe technical indicators of the super-absorbent polymer for paper diapers (sheets, pads) and sanitary towels (pads) shall comply with the requirements of Table 1.5 Test methods5.1 Sampling Before sampling, it shall first shake the container which contains the sample for 3 times ~ 5 times, to mix the sample uniformly. Then place it for 5 min, open the package to take out the sample. 5.3 Volatile content The volatile content is determined in accordance with Appendix B. 5.4 pH pH is determined in accordance with Appendix C. 5.5 Distribution of particle size The distribution of particle size is determined in accordance with Appendix D. 5.6 Density Density is determined in accordance with Appendix E. 5.10 Absorption amount under pressure The absorption amount under pressure is determined in accordance with Appendix I. 5.11 Extractables content Extractable content is determined in accordance with Appendix J. 5.12 Appearance Place the specimen in normal light to perform visual inspection.6 Inspection rules6.1 Provisions on inspection batch The products which are produced by the same raw material, the same process and the same period of time form a batch, the amount of each batch does not exceed 500 t. 6.3 Rules for decision When the inspection product meets the requirements of this standard or contract, it is judged to be qualified; when any of the inspection items fails, it is judged to be unqualified. 6.4 Quality assurance The manufacturer shall ensure that the product quality meets the requirements of this standard or contract.7 Marking, packaging, transportation, storage7.1 Sales mark and packaging 7.1.1 The product sales package shall be marked with the following contents. 7.2 Transportation and storage 7.2.1 The products shall be transported by means which are rain-proof, moisture-proof, and clean. It shall not be transported together with contaminated materials.Appendix A(Normative) Determination of residual monomers (acrylic acid) A.1 Principle The sample is extracted by physiological saline, the residual monosodium acrylate and acrylic acid in the sample are transferred to the solution. After 1 hour, the solution is filtered, the filtrate is taken and subjected to high performance liquid chromatography to measure the content of acrylic acid, the result is based on the content of acrylic acid. A.2 Reagents and materials Unless otherwise specified, only chromatographic reagents are used. A.2.1 Water, GB/T 6682, level I. A.2.7 Acrylic standard stock solution (1000 mg/L). WEIGH 0.1000 g of acrylic acid (A.2.6), accurate to 0.0001 g, PUT it into a 100 mL volumetric flask, USE water to dilute it to 100 mL. A.2.8 Acrylic standard intermediate solution (100 mg/L). PIPETTE 10 mL of acrylic acid standard stock solution (A.2.7) into a 100 mL volumetric flask, USE water to dilute it to 100 mL. A.3 Instruments and equipment A.3.1 High performance liquid chromatography. A.3.2 UV detector, the detector wavelength of 210 nm. A.3.3 Balance, the sensitivity is 0.0001 g. A.3.4 Beaker, the capacity is 250 mL. A.3.5 Magnetic stirrer and stir bar. A.3.6 Membrane filter, the membrane’s pore size is 0.45 μm. A.3.7 C18 column, 5 μm, 4.6 mm x 150 mm or equivalent column, suitable for guard column. A.3.8 C18 guard column, 5 μm, 4.6 mm x 10 mm or equivalent guard column. A.4 Determination steps A.5 Calculation of results Based on the peak area of the test solution and the standard working curve, CALCULATE the concentration of acrylic acid in the sample solution. USE the formula (A.1) to calculate the residual monomer (acrylic acid) content in the sample. ......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 22875-2018 be delivered?Answer: The full copy PDF of English version of GB/T 22875-2018 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 22875-2018_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 22875-2018_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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