Photo-curing-based water and oil repellent finishing method for fabric

A water-repellent, oil-repellent, light-curing technology, which is applied in fiber processing, textiles and papermaking, can solve the problems of low processing efficiency, high energy consumption, high water and oil repellency, etc., and achieve low processing energy consumption and substrate The effect of wide adaptability and high fastness

Inactive Publication Date: 2014-01-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The textiles treated by this method have high water repellency and oil repellency, and solve the technical problems of high energy consumption and low processing efficiency in the chemical finishing of the traditional thermal baking method

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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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0024] The chemical fiber fabric is first coated and calendered with a fluorine-containing polyurethane acrylate prepolymer resin system, and then subjected to photocuring treatment to improve the water and oil repellency of the fabric surface. Specific examples are as follows:

Embodiment 1

[0025] Implementation 1: The chemical fiber fabric selected in this implementation is polyester spinning.

[0026] (1) Preparation of fluorine-containing urethane acrylate prepolymer: react TDI with HEA, the molar ratio is 1:1, the amount of dibutyltin laurate is 0.2%, and the fluorine-containing polyether diol is added after the reaction time of 8 hours at 60°C For long chains, continue to react for 4 hours.

[0027] (2) Photocurable resin coating and rolling on the surface of the fabric: in the photocurable resin system, the prepolymer content is 30%, TPGDA 30%, ethyl acetate consumption is 39%, and photoinitiator consumption is 1%. Surface coating and calendering (liquid retention rate 80%).

[0028] (3) Photocuring treatment: After coating, the fabric is irradiated for 5s under the intensity of ultraviolet lamp 2000W.

[0029] After photocuring treatment, the hydrostatic pressure resistance of the polyester fabric is 3380Pa, and the oil repellency grade measured accordin...

Embodiment 2

[0030] Implementation 2: The chemical fiber fabric selected in this implementation is nylon spinning.

[0031] (1) Preparation of fluorine-containing polyurethane acrylate prepolymer: react TDI with HEA, the molar ratio is 1:1, the amount of dibutyltin laurate is 0.5%, and the fluorine-containing polyether diol is added after the reaction time of 10 hours at 65°C For long chains, continue to react for 2 hours.

[0032] (2) Photocurable resin coating on the surface of the fabric: in the photocurable resin system, the prepolymer content is 40%, the TPGDA content is 20%, the ethyl acetate consumption is 38%, and the photoinitiator consumption is 2%. Surface coating and calendering (liquid retention rate 70%).

[0033] (3) Photocuring treatment: After coating, the fabric is irradiated for 4s under the intensity of ultraviolet lamp 2000W.

[0034] After photocuring treatment, the hydrostatic pressure resistance of the polyester fabric is 3250Pa, and the oil repellency grade is 6 ...

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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PUM

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Abstract

The invention discloses a photo-curing-based water and oil repellent finishing method for a fabric, belonging to the technical field of fabric finishing, and aiming to overcome the shortcomings of high baking temperature, high production energy consumption and low processing efficiency in conventional after-finishing and achieve the water and oil repellent functional finishing of the fabric under a photo-curing condition. A process specifically comprises the following steps of (1) synthesizing a fluorine-containing urethane acrylate prepolymer, namely carrying out reaction on isocyanate and hydroxyethyl acrylate and carrying out reaction on a reaction product and a fluorine-containing polyether type diol long chain to obtain the prepolymer, or carrying out reaction on isocyanate and fluorine-containing polyether type diol and then adding the hydroxyethyl acrylate into a system; and (2) preparing a photo-curable resin system from the prepolymer, a reactive diluent, a photoinitiator, a solvent and the like, coating and rolling-compacting the photo-curable resin system on the surface of the fabric, and irradiating the fabric for a certain time by using ultraviolet light to finish curing of a resin with water and oil repellent effects on the surface of the fabric. According to the method, the water and oil repellent performance of the finished fabric is improved, and the strength of the fabric is slightly weakened; compared with a conventional thermal-baking-based chemical finishing method, the photo-curing-based water and oil repellent finishing method for the fabric has the advantages that the process flow is short, the energy consumption is low and the efficiency is high.

Description

technical field [0001] The present invention relates to a fabric water-repellent and oil-repellent finishing method based on light-curing method, in particular to a finishing method that utilizes high-energy ultraviolet light to copolymerize and solidify fluorine-containing polyurethane acrylate prepolymer on the surface of the fabric to endow the fabric with water-repellent and oil-repellent properties. The method belongs to the technical field of textile finishing and processing. Background technique [0002] Photocuring technology is an energy-saving, clean and environmentally friendly technology. Its basic principle is to use the high-energy ultraviolet light activation energy to break the carbon-carbon double bond in the unsaturated resin and generate free radicals, thereby triggering resin curing. In the photocuring process, the photoinitiator is first excited by ultraviolet light and decomposed to generate active free radicals. The active free radicals hit the double ...

Claims

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/576D06M23/00D06M101/32D06M101/34
Inventor 王平吴敏邱华
Owner JIANGNAN UNIV
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