GB/T 39748.7-2021 English PDF

US$184.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 39748.7-2021: Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 7: Gravimetric determination of absorption under pressure
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 39748.7-2021	184	Add to Cart	3 days	Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 7: Gravimetric determination of absorption under pressure	Valid

Similar standards

YY/T 1680   GB/T 39381.1   YY/T 1571   GB/T 39748.6   GB/T 39748.8   GB/T 39748.11   

Basic data

Standard ID: GB/T 39748.7-2021 (GB/T39748.7-2021)
Description (Translated English): Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 7: Gravimetric determination of absorption under pressure
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: C45
Word Count Estimation: 10,161
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 39748.7-2021: Urine-absorbing aids for incontinence - Test methods for characterizing polymer-based absorbent materials - Part 7: Gravimetric determination of absorption under pressure

---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 7.Gravimetric determination of absorption under pressure 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 7.Gravimetric method to determine the amount of liquid absorbed under pressure (ISO 17190-7.2001,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 Ⅰ Introduction Ⅱ 1 Scope 1 2 Normative references 1 3 Principle 1 4 Reagent 1 5 Instrument 1 6 Sampling 2 7 Step 3 8 Calculation 3 9 Accuracy 3 10 Inspection report 4 Appendix A (informative appendix) Special case recommendations for different test cylinder diameters and pressures 5 Appendix B (informative appendix) Statistical results of inter-laboratory tests 6

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 7 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 part is equivalent to the ISO 17190-7.2001 "Characteristics of Incontinence Urine Absorption Aids Polymer Matrix Absorbent Test methods for performance Part 7.Gravimetric method to determine the amount of liquid absorbed under pressure". 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 6682-2008 Analytical laboratory water specifications and test methods (ISO 3696.1987, MOD); ---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 unit of this section. National Research Center for Rehabilitation Assistive Devices. The main drafters of this section. Ma Fengling, Yang Dehui, Liu Junling.

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 to be suitable for the detection of sodium polyacrylate superabsorbent materials in sanitary products, including the material detection of urine absorption aids for incontinent persons Measurement. These test methods are specifically used for testing materials, and are not applicable or applicable to the testing of finished urine absorption aids. This part of GB/T 39748 is in accordance with ISO 17191 "Urine absorption aids for incontinence. Polyacrylic acid can be inhaled in the air. Highly absorbent water Material Sodium Atomic Absorption Spectrometry for the Determination of Dust in the Collection Box" is used together. Urine absorption aids for incontinence Testing method of polymer matrix absorbent material properties Part 7.Gravimetric method to determine the amount of liquid absorbed under pressure

1 Scope

This part of GB/T 39748 specifies the determination of the absorption of salt solution by polyacrylate (PA) super absorbent powder under specific pressure method. This section applies to materials whose particle size is less than 45 μm and does not exceed 0.1%.

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- mosphereforconditioningandtestingandprocedureformonitoringtheatmosphereandconditioning ofsamples) ISO 3696 Analytical laboratory water specifications and test methods (Waterforanalyticallaboratoryuse-Specification andtestmethods) ISO 5725-2 Measurement methods and accuracy of results (accuracy and precision) Part 2.Determination of repeatability of standard measurement methods And the basic method of reproducibility [Accuracy(truenessandprecision)ofmeasurementmethodsandresults-Part 2.Basicmethodforthedeterminationofrepeatabilityandreproducibilityofastandardmeasurement method]

3 Principle

Weigh the sample, spread the sample on the filter screen at the bottom of the prescribed test cylinder, and place the test cylinder in a petri dish filled with salt solution. On the filter plate, uniformly apply pressure to the sample, and after contact and absorption for 1 hour, remove the test cylinder, weigh it, and determine the amount of liquid absorbed.

4 Reagents

Unless otherwise specified, only analytical reagents can be used. 4.1 Water, in accordance with ISO 3696. 4.2 Sodium chloride solution, c (NaCl) = 0.9% (mass fraction). Weigh 9g of sodium chloride to the nearest 0.1g, add it to a 1L volumetric flask (5.4), add deionized water (level 3, see 4.1) to the mark. Shake to Dissolve.

5 Instruments

5.1 The instrument for measuring the absorption rate under pressure is shown in Figure 1.The composition is as follows. ......

Image     

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 39748.7-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 39748.7-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 39748.7-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 39748.7-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.