GB/T 39748.9-2021 English PDF

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GB/T 39748.9-2021: Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 9: Gravimetric determination of density
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Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39748.9-2021	184	Add to Cart	3 days	Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 9: Gravimetric determination of density	Valid

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YY/T 1680   GB/T 39381.1   YY/T 1571   GB/T 39748.6   GB/T 39748.7   GB/T 39748.11   

Basic data

Standard ID: GB/T 39748.9-2021 (GB/T39748.9-2021)
Description (Translated English): Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 9: Gravimetric determination of density
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C45
Word Count Estimation: 10,193
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39748.9-2021: Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 9: Gravimetric determination of density

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 9.Gravimetric determination of density ICS 11.180.20 C45 National Standards of People's Republic of China Urine absorption aids for incontinence Testing method of polymer matrix absorbent material properties Part 9.Determination of Density by Gravimetric Method (ISO 17190-9.2001,IDT) Released on 2021-03-09 2021-03-09 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ Introduction Ⅳ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 General 1 5 Instrument 1 6 Sampling 2 7 Step 3 8 Calculation 3 9 Accuracy 3 10 Inspection report 4 Appendix A (informative appendix) Statistical results of inter-laboratory tests 5

Foreword

GB/T 39748 "Test Method for Characteristics of Polymer Matrix Absorbent Materials for Urine Absorption Aids for Incontinence" is divided into the following parts. ---Part 1.Determination of pH; ---Part 2.Determination of residual monomer content; ---Part 3.Determination of particle size distribution by sieving method; ---Part 4.Determination of moisture content by heating weight loss method; ---Part 5.Determine the water absorption rate by weighing method in normal saline; ---Part 6.Gravimetric method to determine the retention rate of normal saline after centrifugation; ---Part 7.Gravimetric method to determine the amount of liquid absorbed under pressure; ---Part 8.Determination of flow by weighing method; ---Part 9.Determination of density by weighing method; ---Part 10.Potentiometric titration method to determine the amount of extractable polymer; ---Part 11.Determination of the content of inhalable particles. This part is Part 9 of GB/T 39748. This section was drafted in accordance with the rules given in GB/T 1.1-2009. The translation method used in this section is equivalent to the ISO 17190-9.2001 "Characteristics of Polymer Matrix Absorbent Materials for Incontinence Urine Absorption Devices" Test methods for sex. Part 9.Density determination by gravimetric method." The Chinese documents that have a consistent correspondence with the international documents cited in this section are as follows. ---GB/T 10739-2002 Standard atmospheric conditions for handling and testing of paper, paperboard and pulp samples (eqvISO 187.1990); ---GB/T 6379.2-2004 Measurement method and accuracy of results (accuracy and precision) Part 2.Determine standard measurement The basic method of measurement method repeatability and reproducibility (ISO 5725-2.1994, IDT). Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This part was proposed by the Ministry of Civil Affairs of the People's Republic of China. This part is under the jurisdiction of the National Standardization Technical Committee for Rehabilitation and Special Equipment for the Disabled (SAC/TC148). Drafting units of this section. National Research Center for Rehabilitation Assistive Devices, Linyi City Social Welfare Institute. The main drafters of this section. Ma Fengling, Li Mingjie, Duan Wen.

Introduction

The GB/T 39748 series of test methods were originally formulated by the European Disposable Nonwovens Association, without technical modification, and integrated into ISO 17190 is an international standard published in 11 parts. These test methods have been used in practice for many years, and their reliability is measured according to the general standards (validity and reproducibility, etc.) of the test methods. It has been proved that it is suitable for the detection of sodium polyacrylate superabsorbent materials for sanitary products, including the detection of urine absorbent materials for incontinent persons. These trials The test method is specifically used for testing materials, and is not applicable or applicable to the testing of finished urine absorbents. Urine absorption aids for incontinence Testing method of polymer matrix absorbent material properties Part 9.Determination of Density by Gravimetric Method

1 Scope

This part of GB 39748 specifies the method for measuring the density of polyacrylate super absorbent powder used in urine absorption aids for incontinence. This section applies to the density determination of 0.67g/mL~0.72g/mL (see Appendix A), and is expected to be applicable to a larger range.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. ISO 187 Standard atmospheric conditions for the treatment and testing of paper, paperboard and pulp samples (Paper, boardandpulps-Standardat- mosphereforconditioningandtesting) ISO 5725-2 Measurement methods and accuracy of results (accuracy and precision) Part 2.Determination of repeatability of standard measurement methods The basic method of reproducibility (Accuracy (trueness and precision) of measurement methods and results-Part 2. Basicmethodforthedeterminationofrepeatabilityandreproducibilityofastandardmeasurement method) ISO /T R15510 stainless steel chemical composition (StainlessSteels-Chemical composition)

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Apparent density The mass per unit volume after the powder falls freely. Note. The apparent density is expressed in grams/ml.

4 General

Pour the sample into the funnel, leak into the density cup, and determine the apparent density of the polyacrylate super absorbent powder. Mass in grams, volume In milliliters, the mass of the sample is divided by the volume of the density cup to calculate the apparent density of the polymer.

5 Instruments

5.1 Density cup (see Figure 1), stainless steel cylinder, smooth inner wall, parameters are as follows. ---Capacity (100±0.5) mL; ---Inner diameter (45±0.1)mm; ......

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