Selection principles of antibacterial finishing ag

2022-07-22
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There are many varieties of antibacterial finishing agents, and the following principles should be paid attention to when selecting them. The dosage should be small, the antibacterial effect should be strong, and the price should be reasonable. The treated fabric has good water washing and dry cleaning properties. It does not contain any heavy metal ions, formaldehyde, mutagenicity, teratogenicity and potential carcinogenicity, and is non irritating and non allergic to human body, which meets the requirements of environmental protection. It does not affect the original style of textiles, color fastness and shade. It does not affect the feel and breathability of the fabric. To match all

there are many varieties of antibacterial finishing agents, and the following principles should be paid attention to in the selection

the dosage should be small, the antibacterial effect should be strong, and the price should be reasonable

the treated fabric has good water and dry cleaning resistance

it does not contain any heavy metal ions, formaldehyde, mutagenicity, teratogenicity and potential carcinogenicity, and has no irritation and allergy to human body, which meets the requirements of environmental protection

does not affect the original style of textiles, color fastness and shade

does not affect the feel and permeability of the fabric

there are not many antibacterial finishing agents that need to meet the above requirements. Among them, dc-5700 of Dow Corning company of the United States, sd-875 of domestic Shandong Julong Chemical Co., Ltd. and WS-8810 of Shenzhen Beiyue Haiwei chemical plant are ideal. This kind of antibacterial agent is organosilicon quaternary ammonium compound, and its main component is 3 - (trimethoxysilyl propyl) dimethyl Octadecyl Amine chloride

its antibacterial principle is that the silicone component has coupling characteristics. Through the coupling and combination of silicone alcohol and - OH group on the fiber, a polymer film not deeper than water and general organic solvents is formed on the surface of the fiber, forming a barrier to microorganisms. Generally, bacteria are negatively charged, and organosilicon quaternary ammonium salt is positively charged. When bacteria contact with antibacterial agents, they form an adsorption layer, which destroys the metabolism of cell wall. In order to obtain good antibacterial effect, the requirements for semi-finished products are more stringent, otherwise, the antibacterial polymer film is difficult to form a good fastness on the fabric

the specific requirements are: the singeing should be clean and the singeing finish should be above grade 4. Desizing should be clean, scouring and bleaching should be uniform, and the gross effect should be 12 ~ 13cm/30min, so as to prevent the size and wax from affecting the permeability of the fabric and improve the penetration effect of antibacterial agent in the fiber. The mercerization should be "sufficient" and the cloth surface should be washed clean. Otherwise, the alkaline cloth surface will destroy the working solution of antibacterial agent (the pH value of the working solution of antibacterial agent is 5 ~ 6), so that the reaction between silanol and - OH group in cellulose fiber is unstable and the antibacterial efficiency is reduced. If the finished product is bleached, the brightener with good acid resistance should be selected when choosing the brightener, otherwise the finished product will turn yellow or red, reducing the whiteness of the finished product

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