Papers by Keyword: Fixing

Abstract: Three devices are offered for fixing magnetically operated sealed switches at a safe distance from conductor wires. It is demonstrated that they provide current protection without the use of current transformers. It is described how to adjust and calculate the current in the wire where the magnetically operated sealed switch functions.

Abstract: The fixing performance of chitosan hydrochloride (CSH) with different molecular weight and chitosan biguanide hydrochloride (CSGH) as a fixing agent for cotton fabric dyed with reactive dyes was discussed. The results showed that the fixing effects of CSH on reactive dyes were related to its molecular weight, and the CSH with high molecular weight (HMW) exhibited better fixing effects than that with low molecular weight (LMW). The fixing effects of CSGH on reactive dyes were superior to that of the CSH with HMW, because of the CSGH molecule with positive charges and the imino groups, which could further strengthened the interaction among the CSGH, dyes and cellulose molecules. After treated by the CSGH, the soaping, perspiration and dry rubbing fastness of the dyed fabrics could be increased 0.5 to 1 grade, while the wet rubbing fastness of ones was also improved obviously. The infrared spectrum (FTIR) of the dyed fabric treated by CSGH showed that a cross-linking was formed among CSGH, dyes and cellulose molecules.

Abstract: To improve the color fastness of the ramie fabric dyed with reactive dye, we researched the fixation effects of Chitosan biguanide hydrochloride (CGH), silicon sol and the fixing agent TR7234 on the ramie fabric. It was found that the mixture of CGH/silicon sol/TR7234 improved obviously the color fastness of the reactive dye on the fabric. The color fastness to dry rubbing increased by 1grade and the color stability to washing got the raise. Based on SEM and FTIR analysis, it was shown that the mixture of three agents formed a film on the surface of the fabric, and this film had the chemical bonds with some cellulose molecules.