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Super absorbent polymer and measuring method of super absorbent polymer in hygienic product

A technology of superabsorbent resin and superabsorbent resin, which is applied in the direction of chemical analysis by titration method, which can solve the problems of cumbersome operation and large deviation, and achieve the effect of strong anti-interference, low cost, and fast and simple measurement method

Active Publication Date: 2012-03-28
XIAMEN BARON FLUORIDE MATERIALS TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

This method is not only cumbersome to operate, but also has large deviations, especially for samples that have been tested with physiological saline, the above method is no longer applicable

Method used

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Experimental program
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Embodiment 1

[0013] (1) Solution preparation

[0014] The concentration of the prepared magnesium chloride solution is 0.2mol / L, the concentration of the sodium hydroxide solution is 3mol / L, and the concentration of the EDTA solution is 1mol / L.

[0015] (2) Determination of complexation degree of superabsorbent resin (SAP) to magnesium ions

[0016] Weigh the mass m of the superabsorbent resin as 1.0g, soak it in 150ml of magnesium chloride solution, the mass of magnesium ion m 0 It is 0.72g, stir to make it fully expand. Stand still until the polymer sinks, and take the supernatant during the test. Pipette 10ml of soaking solution, add 40ml of water, sodium hydroxide solution and indicator, titrate with calibrated EDTA immediately after mixing, record the consumed EDTA volume V 1 is 60ml, calculate the remaining magnesium ion mass m 1 It is 0.46g.

[0017] The degree of complexation k is equal to the ratio of the difference between the amount of magnesium ions in the extract befo...

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Abstract

The invention discloses a super absorbent polymer and a measuring method of the super absorbent polymer in a hygienic product. The technical scheme is as follows: utilizing inorganic salt ion Mg2+ and the quantitative chelation of the super absorbent polymer for soaking a certain quantity of super absorbent polymer in certain concentration and volume of excessive Mg2+ ion signed solution, and stirring so as to conduct complexation reaction on the super absorbent polymer and salt ions in the mixture, and utilizing EDTA (Ethylene Diamine Tetraacetic Acid) back titration method for measuring the chelation coefficient K of the super absorbent polymer; and soaking the hyginenic product to be measured in the certain concentration and volume of the excessive Mg2+ ion solution, and stirring so as to conduct the complexiation reaction on the super absorbent polymer and the Mg2+ ion, and utilizing the EDTA back titration method for indirectly measuring the quantity m of the Mg2+ ion in complexation with the super absorbent polymer, wherein m / k is the content of the super absorbent polymer in the hyginenic product. The method has the advantages of simple operation, objective and real measured data, good repeatability, low cost and easy operation.

Description

technical field [0001] The invention belongs to the field of testing methods, in particular to a method for testing the content of superabsorbent resin in disposable sanitary products. Background technique [0002] In the disposable hygiene products industry, the rewet volume of diapers or sanitary napkins is often used to measure the dry performance of products. When a certain batch of samples with abnormal rewet volume is tested, it will be difficult to know whether the abnormal rewet volume is caused by the abnormal high molecular content of the sample, because the samples that have been tested for rewet volume with normal saline There is no way to use the traditional sodium ion electrode method to determine the content of super absorbent resin (SAP). In order to solve this problem, it is of great significance to develop a new test method capable of testing hygienic products, especially the SAP content in samples that have been tested for rewetting performance. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/16
Inventor 刘榕城周丕严王朝阳刘忠良
Owner XIAMEN BARON FLUORIDE MATERIALS TECH
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