Discussion on how to determine the content of inorganic fillers in non-woven fabrics (free experiment conclusion sharing)

Abstract: This article describes the method of ashing and complexometric titration to determine the content of inorganic fillers in non-woven fabrics and to further determine the content of calcium carbonate, and the reliability and reproducibility of the method are verified through experiments. The experimental results show that the measurement method in this paper is in good agreement with the process data. Inorganic filler modified non-woven fabrics have the characteristics of economy, functionality and environmental coordination, and are more and more widely used in the market. However, some non-woven fabric manufacturers are afraid of affecting product quality and corporate reputation and resolutely do not add or add a small amount of inorganic fillers; some manufacturers ignore product quality and excessively add inorganic fillers, disrupting the market order. In order to provide a scientific and reliable basis for both the supplier and the demander, this article describes the method of ashing and complexometric titration to determine the content of inorganic fillers in non-woven fabrics and to further determine the content of calcium carbonate, and the reliability and reliability of the method are verified by experiments. Reproducibility. The amount of calcium carbonate used in non-woven fabrics is more than 80%, and inorganic powders such as barium sulfate and titanium dioxide are used in a small amount. All the organic components in the non-woven fabric will be decomposed and volatilized when heated to 200-5000C, leaving only the inorganic components such as calcium carbonate, dihydrogen needles or talc. Experimental principle: calcining the sample at a certain temperature in a muffle furnace, weighing the remaining residue after the organic matter is burned and decomposed, and the total amount of inorganic fillers contained in the Disciplinary Committee Shiyang: After dissolving the residue with dilute hydrochloric acid, the calcium carbonate is determined by complexometric titration Content. Experimental steps: abbreviated Experimental conclusion: Ashing and complexometric titration methods are used to determine the content of inorganic fillers and calcium carbonate in non-woven fabrics with good reliability and reproducibility. In previous studies, thermogravimetric analysis was used to determine the content of inorganic fillers in nonwoven fabrics, which is simple to operate and fast. However, the sample cavity of the thermogravimetric analyzer is small, and the amount of the experimental sample is only a few milligrams. Since the uniformity of the non-woven fabric is relatively poor, the sampling position will have a great influence on the test results. The ashing and complexometric titration method has a larger test sample volume than the thermogravimetric analysis method, which can reduce the experimental error caused by sampling, has good reliability and reproducibility, and has simple equipment, easy operation and low cost.