ISO 17190-8:2020 PDF

Name: ISO 17190-8:2020 — Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders — Part 8: Test method for determination of the permeability dependent absorption under pressure of saline solution by gravimetric measurement
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Urine-absorbing aids for incontinence — Polyacrylate superabsorbent powders — Part 8: Test method for determination of the permeability dependent absorption under pressure of saline solution by gravimetric measurement

Название (английский):

ISO 17190-8:2020

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 27 октября 2020 г.
Издание:: ISO IS 17190 edition 2 version 1
ICS:: 11.180.20

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Описание (английский):

This document provides a test method for measuring the permeability-dependent absorption under pressure (PDAUP) of polyacrylate superabsorbent powder, where permeability is a significant controlling factor under the conditions of the test.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 17190-8:2020 specifies a laboratory test method for determining the permeability-dependent absorption under pressure (PDAUP) of polyacrylate superabsorbent powders used in urine-absorbing aids for incontinence. The method uses a gravimetric measurement of saline (0.9 % NaCl) uptake under a defined pressure to evaluate how the permeability of the swollen gel layer controls fluid uptake under constrained conditions.

Key topics and technical requirements

Scope: Measures PDAUP where permeability is a significant controlling factor in absorption behavior.

Principle: A known mass of superabsorbent powder (test portion) is placed in a cylinder with a filtered base, compressed by a piston/weight to apply a constant pressure, and allowed to absorb saline for 60 minutes. The absorbed mass is determined gravimetrically.

Reagents and test fluid: 0.9 % sodium chloride solution prepared with laboratory-grade water (ISO 3696 grade 3); conductivity and temperature control recommended.

Apparatus: PMMA (or equivalent) cylinder with mesh screen, PTFE piston and calibrated piston weight to give the specified pressure (~4 805 Pa; approx. 49 g/cm² or 0.7 psi), ceramic filter plate, Petri dish/tray, precise analytical balances, timer and filter paper.

Conditioning and environment: Samples conditioned to laboratory atmosphere (preferred (23 ± 2) °C and (45 ± 15) % RH) per ISO 187.

Sampling and safety: Instructions for homogenizing powder and checking for lumps; warning about respirable dust (guideline exposure ~0.05 mg/m³) and recommended dust-control precautions.

Procedure essentials: Even bed formation, prevention of gel blocking, refill of saline to maintain level, 60-minute absorption time, careful removal to avoid liquid carry-over, and specified calculations and reporting.

Applications and users

ISO 17190-8:2020 is useful for:

Manufacturers of incontinence products and absorbent cores assessing superabsorbent polymer (SAP) performance under pressure.

Quality control and test laboratories performing absorbency under pressure and supplier qualification.

R&D teams comparing SAP formulations where permeability of the swollen gel layer affects real-world performance (e.g., under body load or layered structures).

Regulatory or procurement specialists requiring standardized test data for product specifications or claims.

Practical applications include product development, comparative material selection, batch acceptance testing, and establishing design limits for urine-absorbing aids.

Related standards

ISO 17190 series (other parts for polyacrylate superabsorbent powders)

ISO 17190-7 (related absorbency methods referenced)

ISO 187 (conditioning atmosphere)

ISO 3696 (water for analytical use)

ISO 4793 (ceramic filter plate porosity)

Keywords: ISO 17190-8:2020, PDAUP, polyacrylate superabsorbent powders, gravimetric measurement, saline solution, absorbency under pressure, incontinence products, superabsorbent polymer test method.

ISO 17190-8:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

BS EN ISO 18771:2020

Anodizing of aluminium and its alloys. Method to test the surface abrasion resistance using glass-coated abra…

BS ISO 17190-4:2020

Urine-absorbing aids for incontinence. Polyacrylate superabsorbent powders. Test method for estimation of the…

BS ISO 17190-7:2020

Urine-absorbing aids for incontinence. Polyacrylate superabsorbent powders. Test method for gravimetric deter…

SIST ISO 4793:1995

Laboratory sintered (fritted) filters -- Porosity grading, classification and designation