HYGIENIC MATERIAL, METHOD FOR MEASURING CONTENT OF WATER-ABSORBING RESIN INCLUDED IN ABSORBENT ARTICLE OR INTERMEDIATE PRODUCT IN MANUFACTURING PROCESS THEREOF, AND METHOD FOR MANUFACTURING HYGIENIC MATERIAL OR ABSORBENT ARTICLE USING SAME

Title:

Document Type and Number:

WIPO Patent Application WO/2018/062531

Kind Code:

A1

Abstract:

[Problem] To provide a convenient/safe and highly precise method for measuring the content of a water-absorbing resin in a hygienic material or absorbent article. [Solution] A method for measuring the content of a water-absorbing resin having a water-soluble cation in the form of an ion-dissociating group in a hygienic material, an absorbent article, or an intermediate product in the manufacturing process thereof that includes the water-absorbing resin, wherein A) a step for measuring the amount of a predetermined water-soluble cation in a standard sample including a known amount of the water-absorbing resin and creating a calibration curve indicating the relationship between the amount of the water-absorbing resin and the amount of the predetermined water-soluble cation in the standard sample on the basis of the obtained measurement result, B) a step for measuring the amount of the predetermined water-soluble cation in a measurement sample of the hygienic material, absorbent article, or intermediate product in the manufacturing process thereof, the measurement sample comprising a portion including the water-absorbing resin, and C) a step for calculating, through use of the calibration curved created in step A), the amount of the water-absorbing resin in the measurement sample from the amount of the predetermined water-soluble cation measured in step B). A measurement method in which step A) and step B) include measuring the amount of the predetermined water-soluble cation using an ion-selective electrode method, and include steps M1) and M2), where M1) is a step (pre-processing step) for immersing the sample in an aqueous solution including a total ionic strength adjusting agent, and M2) is a step for measuring the amount of the predetermined water-soluble cation in the pre-processed supernatant liquid obtained in step M1).

Inventors:

KIMURA KAZUKI (JP)
IWAMURA TAKU (JP)
KITANO TAKAHIRO (JP)
WADA HIDENORI (JP)
FUJIMOTO TAKU (JP)

Application Number:

PCT/JP2017/035642

Publication Date:

April 05, 2018

Filing Date:

September 29, 2017

Export Citation:

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Assignee:

NIPPON CATALYTIC CHEM IND (JP)

International Classes:

G01N27/416; A61F13/84; B01J20/26; G01N31/00; G01N33/44

Foreign References:

JPH01260361A	1989-10-17
JPH09243622A	1997-09-19
JP2001194360A	2001-07-19
JPH11506209A	1999-06-02
JP2014110845A	2014-06-19

Other References: