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Finishing process of formaldehyde-free flame-retardant wool product

A technology for wool and products, which is applied in the direction of flame-retardant fibers, fiber treatment, textiles and papermaking, etc. It can solve the problems of high toxicity of glyoxal and epichlorohydrin, low practical application value, long process flow, etc., and achieve Guaranteed safety and environmental protection, important practical application value, simple process effect

Active Publication Date: 2021-02-26
SUZHOU UNIV
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Problems solved by technology

Pyrovatex CP can also use the same method to flame-retardant wool fabrics, but there is also the problem of formaldehyde release
Chinese invention patent CN 109054694A discloses a preparation process of a flame-retardant down textile material, using diethyl phosphite, N-methylol acrylamide and epichlorohydrin to synthesize a flame retardant monomer, and then synthesizing The silicon-acrylic emulsion is used as a flame-retardant adhesive and a flame-retardant monomer at the same time, and is evenly coated on the surface of the textile fabric to prepare a flame-retardant down textile material. This method is complicated to operate and has a long process flow.
In addition, some studies have first used diethyl phosphite, acrylamide and glyoxal or epichlorohydrin or hexachlorocyclotriphosphazene to synthesize phosphorus-containing flame retardants, and then used the synthetic phosphorus-containing flame retardants by rolling and baking. improve the flame retardant performance of cotton and linen fabrics (synthesis and application of formaldehyde-free flame retardants for linen [J]. Journal of Dalian University of Technology, 2009, 28(002): 154-156; formaldehyde-free phosphorus nitrogen retardant for natural fibers Synthesis and application of flame retardant finishing agent [J]. Woolen Technology, 2019, 47(05): 58-62; Preparation and application of formaldehyde-free flame retardant FRC-P for cotton [J]. Printing and Dyeing, 2006, 32( 24): 14-16; Preparation and application of new durable formaldehyde-free flame retardant for cotton [J]. Printing and Dyeing Auxiliaries, 2014, 31(10): 6-10), which mainly involves the synthesis of flame retardants, which need Preparation of flame-retardant cotton and linen fabrics by multi-step reaction, the method is complicated to operate, the process flow is long, the practical application value is not high, and the glyoxal and epichlorohydrin used are highly toxic

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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  • Finishing process of formaldehyde-free flame-retardant wool product
  • Finishing process of formaldehyde-free flame-retardant wool product

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A finishing process of formaldehyde-free flame-retardant wool fabric, the specific steps are as follows:

[0037] (1) p-Hydroxybenzaldehyde is dissolved in ethanol to obtain p-Hydroxybenzaldehyde alcohol solution; the mass volume ratio of p-Hydroxybenzaldehyde to ethanol is 6.1g:6mL;

[0038] (2) 4-hydroxybenzaldehyde alcohol solution is dissolved in water, mixes uniformly, obtains the first working liquid; The concentration of 4-hydroxybenzaldehyde in the first working liquid is 0.5mol / L;

[0039] (3) Immerse the woolen fabric in the first processing liquid, heat it to 90° C., and keep it warm for 60 minutes. The woolen fabric and p-hydroxybenzaldehyde undergo a Schiff base reaction to obtain an intermediate product; the mass ratio of the woolen fabric to the first processing liquid is 1 :20;

[0040] (4) diethyl phosphite is dissolved in ethanol to obtain diethyl phosphite alcohol solution; the mass volume ratio of diethyl phosphite to ethanol is 10.4g:10mL;

[0041...

Embodiment 2

[0046] A finishing process of formaldehyde-free flame-retardant wool fabric, the specific steps are as follows:

[0047] (1) p-Hydroxybenzaldehyde is dissolved in ethanol to obtain p-Hydroxybenzaldehyde alcohol solution; the mass volume ratio of p-Hydroxybenzaldehyde to ethanol is 12.2g:12mL;

[0048] (2) 4-hydroxybenzaldehyde alcohol solution is dissolved in water, mixes uniformly, obtains the first working liquid; The concentration of 4-hydroxybenzaldehyde in the first working liquid is 1mol / L;

[0049] (3) Immerse the woolen fabric in the first processing liquid, heat it to 85° C., and keep it warm for 90 minutes. The woolen fabric and p-hydroxybenzaldehyde undergo a Schiff base reaction to obtain an intermediate product; the mass ratio of the woolen fabric to the first processing liquid is 1 :20;

[0050] (4) diethyl phosphite is dissolved in ethanol to obtain diethyl phosphite alcohol solution; the mass volume ratio of diethyl phosphite to ethanol is 17.3g:18mL;

[0051...

Embodiment 3

[0054] A finishing process of formaldehyde-free flame-retardant wool fabric, the specific steps are as follows:

[0055] (1) dissolving vanillin in ethanol to obtain vanillin alcohol solution; the mass volume ratio of vanillin to ethanol is 4.6g: 5mL;

[0056] (2) dissolving the vanillin alcohol solution in water, and mixing uniformly to obtain the first processing liquid; the concentration of vanillin in the first processing liquid is 0.3mol / L;

[0057] (3) Immerse the woolen fabric in the first processing liquid, heat it to 98°C, and keep it warm for 60 minutes. The woolen fabric and vanillin undergo a Schiff base reaction to obtain an intermediate product; the mass ratio of the woolen fabric to the first processing liquid is 1:20 ;

[0058] (4) diethyl phosphite is dissolved in ethanol to obtain diethyl phosphite alcohol solution; the mass volume ratio of diethyl phosphite to ethanol is 6.9g:7mL;

[0059] (5) Diethyl phosphite alcohol solution is dissolved in water, mixes...

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Abstract

The invention relates to a finishing process of a formaldehyde-free flame-retardant wool product. The finishing process comprises the following steps: immersing the wool product in a solution containing aromatic aldehyde, controlling the wool product and the aromatic aldehyde to carry out a Schiff base reaction to obtain an intermediate product, immersing the intermediate product in a solution containing phosphite ester, controlling the intermediate product and phosphite ester to carry out a Pudovik addition reaction to prepare the flame-retardant wool product. By means of chemical reactions among the aromatic aldehyde, the phosphite ester and the wool product, the phosphite ester is firmly fixed on wool fibers through covalent bonds. The aromatic aldehyde adopted in the method is a natural product, the phosphite ester is high in flame retardant efficiency, technological operation is simple, and reaction conditions are mild. The flame-retardant wool product prepared by the method has the advantages of excellent flame-retardant effect, favorable water washing resistance, low toxicity of the used flame retardant and mild treatment conditions, ensures the environment friendliness andsafety of the flame-retardant wool product in a use process, does not release formaldehyde, and has important practical application value.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant finishing of textiles, and in particular relates to a finishing process of formaldehyde-free flame-retardant wool products. Background technique [0002] Wool is an important natural protein fiber, which has excellent properties such as good wearing performance, comfortable wearing, and ecological health care, and is known as a high-grade textile material. Wool textile products have been widely used in various fields of life, but they also bring us fire hazards. Due to the high nitrogen content and high moisture content, wool fiber itself has certain flame retardant properties, but its inherent flame retardant properties still cannot meet the requirements of flame retardant textiles. Improve the flame retardant properties of wool textiles to improve its fire safety and meet the requirements of flame retardant textiles. International market demand has very practical significance. [0003]...

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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IPC IPC(8): D06M13/292D06M13/152D06M13/13D06M13/127D06M101/12
CPCD06M13/292D06M13/152D06M13/127D06M13/13D06M2101/12D06M2200/30
Inventor 吴燕祥程献伟关晋平唐人成陈国强
Owner SUZHOU UNIV
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