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Composite medical textile - preparation, characterization, application
Bušinová, Zuzana ; Ing. Vítězslav Zilvar. (referee) ; Krouská, Jitka (advisor)
This bachelor thesis deals with the setting time of the Safix plus gypsum bandage from the Hartmann - Rico a.s. company. The aim of the work is to improve the quality control process of this product and developing a simple robust method for determining the quality control of the Safix plus plaster cast. Two methods and instruments were chosen for the measurement, the Vicat instrument and a rheometer. Vicat's device works on the principle of measuring the depth of penetration of the penetrating body into the sample from a constant height. A rheometer is used to measure rheological properties of the sample, such as viscosity. For both of these methods, it was necessary to prepare the gypsum powder from the gauze. By measuring on the rheometer, the setting time was determined to be 2.4 ± 0.1 minutes and by measuring on the Vicat instrument the observable setting time was determined to be 3.1 ± 0.2 minutes and the complete solidification time to be 6.0 ± 0.4 minutes. Due to the purchase price of the rheometer and in combination with the intended purpose (i.e., product quality control in the commercial sector), the use of a Vicat device appears to be a more suitable option, not only due to the considerably lower purchase price, but also due to simplicity of measurement.
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Composite medical textile - preparation, characterization, application
Bušinová, Zuzana ; Ing. Vítězslav Zilvar. (referee) ; Krouská, Jitka (advisor)
This bachelor thesis deals with the setting time of the Safix plus gypsum bandage from the Hartmann - Rico a.s. company. The aim of the work is to improve the quality control process of this product and developing a simple robust method for determining the quality control of the Safix plus plaster cast. Two methods and instruments were chosen for the measurement, the Vicat instrument and a rheometer. Vicat's device works on the principle of measuring the depth of penetration of the penetrating body into the sample from a constant height. A rheometer is used to measure rheological properties of the sample, such as viscosity. For both of these methods, it was necessary to prepare the gypsum powder from the gauze. By measuring on the rheometer, the setting time was determined to be 2.4 ± 0.1 minutes and by measuring on the Vicat instrument the observable setting time was determined to be 3.1 ± 0.2 minutes and the complete solidification time to be 6.0 ± 0.4 minutes. Due to the purchase price of the rheometer and in combination with the intended purpose (i.e., product quality control in the commercial sector), the use of a Vicat device appears to be a more suitable option, not only due to the considerably lower purchase price, but also due to simplicity of measurement.
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