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Fluorine-free water-repellent finishing method for cotton fabric

A fluorine-free water-repellent, cotton fabric technology, used in fiber processing, plant fibers, textiles and papermaking, etc., can solve the problems of difficult to achieve water-repellent effect, cumbersome operation, hard fabric feel, etc., and achieve changes in air permeability and breaking strength. Small, simple preparation process, good dispersion performance

Active Publication Date: 2022-04-29
WUHAN TEXTILE UNIV +1
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  • Claims
  • Application Information

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Problems solved by technology

Although the layer-by-layer assembly can build ionic bonds between the fabric and the wax molecules, and increase the adhesion between the wax molecules and the fiber surface through the adsorption of positive and negative charges, this method is cumbersome to operate, and after repeated padding The fabric feels hard, it is difficult to achieve the ideal water repellent effect

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Fluorine-free water-repellent finishing method for cotton fabric
  • Fluorine-free water-repellent finishing method for cotton fabric
  • Fluorine-free water-repellent finishing method for cotton fabric

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Embodiment Construction

[0048] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples are only used to explain the present invention, but not to limit the scope of the present invention.

[0049] 1. Research on the preparation technology of biological wax emulsion

[0050] 1. Since the emulsion prepared by the water-in-wax emulsification method is uniform, there is no large particle solid or demulsification, and there are a large number of solid particles in the upper layer of the emulsion prepared by the wax-in-water emulsification method, indicating that the biological wax is not completely emulsified. After centrifugation, the emulsion prepared by the water-in-wax emulsification method did not delaminate, while the emulsion prepared by the wax-in-water emulsification method was delaminated, which remained layered after vigorous shaking. The emulsion prepared by the water-in-wax method has good dispersibility in water a...

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Abstract

The invention relates to a cotton fabric fluoride-free water-repellent finishing method which comprises the following steps: step 1, dipping a cotton fabric in a biological wax emulsion, pretreating the cotton fabric by using the biological wax emulsion, then taking out the cotton fabric and drying the cotton fabric at 50-80 DEG C; and step 2, dipping the cotton fabric treated in the previous step in an epoxy resin auxiliary agent, then taking out the cotton fabric, and drying the cotton fabric at 150-170 DEG C to obtain the cotton fabric with the water-repellent function. Aiming at the problems that the current fluorine-containing water-repellent finishing agent has an environment-friendly problem and the fluorine-free water-repellent finishing agent is less and higher in cost, the invention researches and develops the wax emulsion water-repellent finishing agent which is simple in preparation process, lower in cost and green and environment-friendly by taking biological wax as a raw material. The optimal preparation process of the biological wax emulsion water-repellent finishing agent is discussed. The cotton fabric finished by the biological wax emulsion has good water-repellent effect and durability, and a new way is provided for development and application of a fluoride-free water-repellent finishing agent.

Description

technical field [0001] The invention belongs to the field of water-repellent methods for cotton fabrics, in particular to a fluorine-free water-repellent finishing method for cotton fabrics. Background technique [0002] Water-repellent finishing is to change the structural composition of the surface layer of the fabric by covering the material with low surface energy groups on the fabric, so that it can achieve the water-repellent effect. So far, the commonly used water-repellent finishing agents in the industry are mainly fluorine-containing water-repellent finishing agents. Because fluorine is the most effective substance to reduce the surface free energy of substances. It has a very small atomic radius and has the greatest electronegativity of all atoms. Fluorine forms a stable covalent bond with carbon atoms, which can make the fabric surface obtain lower surface energy. However, studies have found that fluorocarbon polymers can be oxidized and decomposed in the natu...

Claims

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Application Information

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IPC IPC(8): D06M15/17D06M15/55D06M101/06
CPCD06M15/55D06M15/17D06M2101/06D06M2200/12Y02P70/62
Inventor 陈益人周敏曾玉晖陈知杰胡方倩刘泠衫李圣雨
Owner WUHAN TEXTILE UNIV
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