CN115110321A - Method for improving fluorescence yellow fluorescence of flame-retardant knitted fabric - Google Patents

Method for improving fluorescence yellow fluorescence of flame-retardant knitted fabric Download PDF

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Publication number
CN115110321A
CN115110321A CN202210810231.3A CN202210810231A CN115110321A CN 115110321 A CN115110321 A CN 115110321A CN 202210810231 A CN202210810231 A CN 202210810231A CN 115110321 A CN115110321 A CN 115110321A
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washing
knitted fabric
fluorescence
flame
dyeing
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CN115110321B (en
Inventor
陶玉忠
王晓晨
宗军
孙春灵
朱红亚
逯新江
王新华
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Xinxiang Xinxing Special Fabric Co ltd
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Xinxiang Xinxing Special Fabric Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
    • D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
    • D06L4/13—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using inorganic agents
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic System
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/50—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with hydrogen peroxide or peroxides of metals; with persulfuric, permanganic, pernitric, percarbonic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/59—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with ammonia; with complexes of organic amines with inorganic substances
    • D06M11/60—Ammonia as a gas or in solution
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
    • D06M16/003—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic with enzymes or microorganisms
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67333—Salts or hydroxides
    • D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • D06P1/67383—Inorganic compounds containing silicon
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/30—Flame or heat resistance, fire retardancy properties

Abstract

The invention belongs to the technical field of dyeing, and provides a method for improving the fluorescence yellow fluorescence of flame-retardant knitted fabric. The stacking temperature of the cold batch dyeing is controlled, so that the brightness of the fluorescent yellow is ensured; the flame retardant property of the knitted fabric is ensured and the great attenuation of the fluorescence degree in the flame retardant process is avoided by controlling the mass concentration of the flame retardant; by controlling the ammonia flow of ammonia fumigation crosslinking, the reduction of fluorescence is avoided and the flame retardant property of the knitted fabric is ensured. The results of the examples show that after the knitted fabric is treated by the method provided by the invention, the brightness beta value of the knitted fabric is not lower than 0.7, and not only the initial test is passed after the flame retardance is carried out, but also the European standard hernia lamp can pass after being continuously irradiated for 20 hours and the American standard hernia lamp can pass after being continuously irradiated for 40 hours.

Description

Method for improving fluorescence yellow fluorescence of flame-retardant knitted fabric
Technical Field
The invention relates to the technical field of dyeing, in particular to a method for improving the fluorescence yellow fluorescence of flame-retardant knitted fabric.
Background
The fabric has special warning marks after being dyed by fluorescent yellow dye, and is widely applied due to the early warning function. The fluorescent yellow fabric is endowed with flame retardant property, the labor protection function is increased, and the application field is expanded. Internationally, common textile fluorescence detection standards include European Standard EN ISO 20471:2013 high visibility clothing-test method and requirement and American Standard ANSI107-2020 American national Standard for high visibility safety clothing and accessories, and the fluorescence of the fluorescent yellow fabric is exported to reach the standard. However, the fluorescence decayed severely during the flame retarding process, and again after the flame retarding the fluorescence decayed for 20 and 40 hours of continuous sun exposure. Therefore, the prepared fluorescent yellow fabric has the fluorescence degree capable of passing through European and American standards, and is a technical problem which needs to be solved when fluorescent yellow textiles can be exported to foreign countries.
Two commonly used fluorescent yellow dyes are available: one is direct fluorescent yellow 7GFF, and the other is active ramalin fluorescent yellow FL produced by Desida. Because the direct fluorescent yellow has poor fastness after flame retardance, the direct fluorescent yellow is mostly used for dyeing fabrics, and the flame-retardant fabrics are generally selected from active ramalin fluorescent yellow FL.
Common dyeing methods are pad dyeing, exhaust dyeing and cold dyeing. Pad dyeing is that the fabric is firstly padded with dye, dried and then padded with an alkaline agent to be quickly steamed for color development, the utilization rate of the dye is highest, but if the knitted fabric is padded with the pad dyeing, serious stretching deformation can be generated, and no knitting open-width continuous steaming equipment is provided in China. The dip dyeing is adopted, the time is prolonged when the alkali is added for fixation, the dye is seriously hydrolyzed when the temperature is increased, the utilization rate of the dye is low, and the cost is increased. In addition, the price of the ramatin fluorescent yellow dye FL is high and is 50 times of that of the common reactive dye. By adopting cold pad-batch dyeing, padding dye can generate tension on knitted fabrics, the fabrics are stretched, indexes such as gram weight, breadth, shrinkage and the like of the fabrics after deformation are affected, and particularly the stretched fabrics have reduced density and reduced fluorescence and are less prone to passing European and American standards. Therefore, a method for improving the fluorescence yellow fluorescence of the flame-retardant knitted fabric is needed so that the fluorescence yellow fabric can pass European and American standards.
Disclosure of Invention
The invention aims to provide a method for improving the fluorescence yellow fluorescence of flame-retardant knitted fabric, which improves the fluorescence of the flame-retardant knitted fabric, and the fluorescence of the treated knitted fabric can pass European and American standards.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a method for improving the fluorescence yellow fluorescence intensity of flame-retardant knitted fabric, which comprises the steps of sequentially carrying out cold batch dyeing, flame-retardant treatment, ammonia fumigation crosslinking, oxidation, formaldehyde washing and after-treatment on the knitted fabric;
the stacking temperature of the cold batch dyeing is 22-27 ℃;
the mass concentration of the flame retardant used for flame retardant treatment is 35-45%;
the ammonia flow of the ammonia fumigation cross-linking is 70-75 m 3 /h。
Preferably, the dye solution used for cold batch dyeing comprises the following components in percentage by mass (4-5): 1 and alkali liquor.
Preferably, the dye comprises: 50-60 g/L of ramalin fluorescent yellow FL and 1-1.5 g/L of iron ion chelating dispersant; the alkali liquor comprises: 21-25 g/L of caustic soda and 100-110 g/L of water glass.
Preferably, the rolling residue rate of the cold batch dyeing is 95-100%, and the stacking time of the cold batch dyeing is 22-30 h.
Preferably, the mangle ratio of the flame-retardant treatment is 95-98%, and the moisture content of the falling cloth is 12-14%.
Preferably, the moisture content of the ammonia fumigation crosslinking is 8-10%.
Preferably, the concentration of the oxidant used for oxidation is 40-45 g/L, and the bath ratio of oxidation is 1: (15-20) and the temperature of oxidation is 30-35 ℃.
Preferably, the oxidation process is: oxidizing with an oxidizing agent → washing with cold water → washing with alkali → washing with water at 40-42 deg.C → washing with water at 80-82 deg.C.
Preferably, the water temperature for washing the formaldehyde is 95-98 ℃, the frequency for washing the formaldehyde is 2-3, and the time for washing the formaldehyde each time is 30-40 min.
Preferably, the after-treatment comprises softening treatment, pre-shrinking treatment and washing shrinkage which are sequentially carried out.
The invention provides a method for improving the fluorescence yellow fluorescence intensity of flame-retardant knitted fabric, which comprises the steps of sequentially carrying out cold batch dyeing, flame-retardant treatment, ammonia fumigation crosslinking, oxidation, formaldehyde washing and after-treatment on the knitted fabric; the stacking temperature of the cold batch dyeing is 22-27 ℃; the mass concentration of the flame retardant used for flame retardant treatment is 35-45%; the ammonia flow of the ammonia fumigation cross-linking is 70-75 m 3 H is used as the reference value. The stacking temperature of the cold batch dyeing is controlled, so that the brightness of the fluorescent yellow is ensured; the flame retardant property of the knitted fabric is ensured and the great attenuation of the fluorescence degree in the flame retardant process is avoided by controlling the mass concentration of the flame retardant; by controlling the ammonia flow of ammonia fumigation crosslinking, the reduction of fluorescence is avoided and the flame retardant property of the knitted fabric is ensured. The results of the examples show that after the knitted fabric is treated by the method provided by the invention, the brightness beta value of the knitted fabric is not lower than 0.7, and not only the initial test is passed after the flame retardance is carried out, but also the European standard hernia lamp can pass after being continuously irradiated for 20 hours and the American standard hernia lamp can pass after being continuously irradiated for 40 hours.
Detailed Description
The invention provides a method for improving the fluorescence yellow fluorescence intensity of flame-retardant knitted fabric, which comprises the steps of carrying out cold batch dyeing, flame-retardant treatment, ammonia fumigation crosslinking, oxidation, formaldehyde washing and after-treatment on the knitted fabric in sequence. According to the invention, the flame-retardant knitted fabric with high fluorescence and good flame-retardant performance is obtained by sequentially carrying out cold-batch dyeing, flame-retardant treatment, ammonia fumigation crosslinking, oxidation, formaldehyde washing and after-finishing on the knitted fabric.
The composition and specification of the knitted fabric are not particularly limited, and the method provided by the invention is applicable to various knitted fabrics well known to those skilled in the art. In the invention, the breadth of the knitted fabric is preferably 10-15% wider than that of a required product, and the gram weight of the knitted fabric is preferably 10-12% heavier than that of the required product. The invention preferably adopts the knitted fabric with the width and the gram weight, is favorable for ensuring the width, the gram weight and the shrinkage of a final product, and avoids the reduction of the fluorescence of the final product due to the change of the density of the fabric.
In the present invention, the knitted fabric is preferably subjected to a pretreatment and then to a cold pad dyeing. In the invention, the pretreatment comprises scouring, oxygen bleaching and drying which are carried out in sequence. The operation of scouring, oxygen bleaching and drying is not particularly limited in the invention, and the technical scheme of scouring, oxygen bleaching and drying which is well known to the skilled person in the art can be adopted.
In the invention, the scouring liquid for scouring preferably comprises 10-30 kg of caustic soda and 0.5-2 kg of oil-removing scouring agent. In the invention, the boiling-off temperature is preferably 97-102 ℃; the boiling-off time is preferably 60-90 min. In the invention, the capillary effect of the knitted fabric after scouring is preferably ≧ 12cm/30 min. The invention preferably removes impurities in the knitted fabric through scouring, improves the permeability of the fabric, and thus improves the dye uptake of the subsequent dyeing process.
In the invention, the oxygen bleaching liquid used for oxygen bleaching preferably comprises 10-30 kg of hydrogen peroxide, 15-25 kg of stabilizer and 5-10 kg of scouring enzyme. In the invention, the temperature of the oxygen bleaching is preferably 98-100 ℃; the time of the oxygen bleaching is preferably 40-60 min. The whiteness of the knitted fabric is preferably improved through oxygen bleaching, and the improvement of the fluorescence of the knitted fabric is facilitated. In the present invention, the pH of the knitted fabric after oxygen bleaching is preferably 7; the whiteness of the knitted fabric after the oxygen bleaching is preferably more than or equal to 86 percent; the whiteness test of the knitted fabric after the oxygen bleaching preferably adopts a Datacolor 800 color measuring instrument.
In the invention, the drying temperature is preferably 130-135 ℃; the drying time is preferably 120-150 s. The present invention preferably removes moisture from the knitted fabric by drying.
The operation of the cold pad-batch dyeing is not particularly limited in the invention, and the technical scheme of the cold pad-batch dyeing known to those skilled in the art can be adopted.
In the invention, the dye solution used for the cold batch dyeing preferably comprises a dye and an alkali liquor in a mass ratio of (4-5): 1. The invention preferably adopts the dye solution consisting of dye and alkali liquor to dye, thereby ensuring the dye uptake. The invention has no special requirements on the preparation method of the dye solution, and the dye and the alkali liquor are uniformly mixed.
In the present invention, the dye preferably includes: 50-60 g/L of ramalin fluorescent yellow FL and 1-1.5 g/L of iron ion chelating dispersant; more preferably 55-58 g/L of ramalin fluorescent yellow FL and 1-1.2 g/L of iron ion chelating dispersant. The dosage of the Remardin fluorescent yellow FL is preferably controlled within the range, and the dosage of the Remardin fluorescent yellow FL is excessive and the cost is high; the dosage is too small, the appearance of the knitted fabric is not rich enough, and the fluorescence intensity does not reach the standard. The use of the iron ion chelating dispersant in the invention is beneficial to improving the fluorescence brightness of dye. The preparation method of the invention has no special requirements on the preparation method of the dye, and the ramatin fluorescent yellow FL and the iron ion chelating dispersant are uniformly mixed.
In the present invention, the lye preferably comprises: 21-25 g/L of caustic soda and 100-110 g/L of water glass, more preferably 21-23 g/L of caustic soda and 100-105 g/L of water glass. The invention preferably adopts alkali liquor consisting of caustic soda and water glass, which is beneficial to ensuring the dye uptake. The preparation method of the alkali liquor has no special requirements, and the caustic soda and the water glass are uniformly mixed.
In the invention, the rolling residual rate of the cold pad-batch dyeing is preferably 95-100%, and more preferably 98-100%. The invention preferably controls the cold pad-dry ratio of the cold pad-batch dyeing within the range, which is favorable for ensuring the fluorescence intensity of the knitted fabric.
In the invention, the cold pad-batch dyeing preferably adopts minimum tension, so that the deformation of the knitted fabric can be reduced, and the reduction of the fluorescence of the knitted fabric can be avoided. In the present invention, the minimum tension is preferably 0.
In the invention, the stacking temperature of the cold batch dyeing is 22-27 ℃, and preferably 22-24 ℃. The invention ensures the brightness of the fluorescent yellow of the knitted fabric by controlling the stacking temperature of the cold pad-batch dyeing.
In the invention, the stacking time of the cold pad-batch dyeing is preferably 22-30 h, and more preferably 25-30 h. The invention preferably controls the stacking time of the cold batch dyeing within the range, thereby ensuring the dyeing depth.
After the cold pad-batch dyeing is finished, the knitted fabric after the cold pad-batch dyeing is preferably washed and dried in sequence. The washing and drying operation is not particularly limited in the present invention, and the washing and drying technical scheme known to those skilled in the art can be adopted.
In the present invention, the washing process is preferably: cold water washing → water washing at 95-98 deg.C → glacial acetic acid washing → water washing at 60-65 deg.C → glacial acetic acid and cold water washing. In the invention, the number of times of cold water washing is preferably 2-3, and the time of each washing is preferably 10-15 min; the frequency of washing with water at the temperature of 95-98 ℃ is preferably 1 time, and the washing time is preferably 10-15 min; the pickling temperature of the glacial acetic acid is preferably 50-55 ℃, the washing frequency is preferably 1 time, and the washing time is preferably 10-15 min; the frequency of washing with water at the temperature of 60-65 ℃ is preferably 1 time, and the washing time is preferably 10-15 min; the frequency of glacial acetic acid and cold water washing is preferably 1 time, and the washing time is preferably 10-15 min. The washing scheme is preferably adopted, so that the fluorescence of the knitted fabric is favorably ensured; the cleaner the floating color washing is, the higher the fluorescence is, but the excessive washing removes the floating color, and the formaldehyde washing process after the flame retardant treatment lacks the shielding effect and can reduce the fluorescence on the contrary.
In the invention, the drying temperature is preferably 130-135 ℃. In the present invention, the fluorescence of the knitted fabric after drying preferably satisfies the following criteria: x is 0.37 or more, Y is 0.5 or more, and beta is 0.88 or more; when the fluorescence of the knitted fabric after drying does not satisfy the above standard, the present invention preferably performs cold pad dyeing again.
The operation of the flame retardant treatment is not particularly limited in the present invention, and the technical scheme of the flame retardant treatment of the fabric, which is well known to those skilled in the art, can be adopted.
In the invention, the mass concentration of the flame retardant used for the flame retardant treatment is 35-45%, preferably 35-40%. According to the invention, the flame retardant property of the knitted fabric is ensured and the great attenuation of the fluorescence degree in the flame retardant process is avoided by controlling the mass concentration of the flame retardant. The type and source of the flame retardant are not particularly limited in the present invention, and textile flame retardants well known to those skilled in the art may be used.
In the invention, the mangle squeezing rate of the flame retardant treatment is preferably 95-98%; the moisture content of the cropping cloth subjected to flame retardant treatment is preferably 12-14%.
The operation of the ammonia-fumigation crosslinking is not particularly limited in the present invention, and the technical scheme of ammonia-fumigation crosslinking known to those skilled in the art can be adopted.
In the invention, the ammonia flow of the ammonia fumigation cross-linking is 70-75 m 3 Preferably 70 to 72m 3 H is used as the reference value. The invention avoids the reduction of the fluorescence of the knitted fabric by controlling the ammonia flow of ammonia fumigation crosslinking.
In the invention, the moisture content of the ammonia fumigation crosslinking is preferably 8-10%. The moisture content of the ammonia fumigation crosslinking is preferably controlled within the range, so that ammonia gas and the flame retardant on the knitted fabric are fully crosslinked, and the flame retardant property of the knitted fabric is ensured.
In the present invention, the apparatus used for the ammonia fumigation crosslinking is preferably an ammonia fumigator; the ammonia smoking machine is preferably additionally provided with a cold water roller, and the cold water roller is used for reducing the temperature of the cloth surface after ammonia smoking and crosslinking.
The operation of the oxidation in the present invention is not particularly limited, and the oxidation technique known to those skilled in the art may be used.
In the present invention, the oxidation process is preferably: oxidizing with an oxidizing agent → washing with cold water → washing with alkali → washing with water at 40-42 deg.C → washing with water at 80-82 deg.C. In the invention, the number of times of cold water washing is preferably 1, and the washing time is preferably 30-35 min; the washing liquid used for alkali washing is preferably a mixed liquid of caustic soda and cold water, the number of alkali washing is preferably 1, and the washing time is preferably 30-35 min; the frequency of the water washing at the temperature of 40-42 ℃ is preferably 1 time, and the time of the water washing at the temperature of 40-42 ℃ is preferably 30-35 min; the frequency of the 80-82 ℃ water washing is preferably 1 time, and the time of the 80-82 ℃ water washing is preferably 30-35 min. The alkali washing in the invention can dilute the strong acid generated in the oxidation process in time, thereby reducing the attenuation of the fluorescence caused by color change.
In the invention, the concentration of the oxidant is preferably 40-55 g/L, and more preferably 40-45 g/L. In the present invention, the oxidizing agent is preferably hydrogen peroxide.
In the present invention, the bath ratio of the oxidation is preferably 1 (15 to 20), more preferably 1: 15.
In the invention, the time for oxidation is preferably 15-20 min. In the invention, the temperature of the oxidation is preferably 30-35 ℃, and more preferably 30-32 ℃.
The operation of washing formaldehyde is not particularly limited in the invention, and the technical scheme of washing formaldehyde which is well known to the skilled person can be adopted.
In the invention, the water temperature for washing the formaldehyde is preferably 95-98 ℃, and more preferably 95-96 ℃; the frequency of washing formaldehyde is preferably 2-3 times, and more preferably 2 times; the time for washing formaldehyde for each time is preferably 30-40 min, and more preferably 30-35 min. The invention preferably controls the water temperature, times and time of formaldehyde washing within the above range, thereby not only removing formaldehyde, but also ensuring the fluorescence of knitted fabrics.
After the formaldehyde washing is finished, the knitted fabric after the formaldehyde washing is preferably subjected to cold water washing and glacial acetic acid washing in sequence. In the invention, the number of times of cold water washing is preferably 1, and the washing time is preferably 10-15 min; the number of times of washing with glacial acetic acid is preferably 1, and the washing time is preferably 10-15 min.
In the present invention, the after-finishing preferably includes softening treatment, pre-shrinking treatment and washing shrinkage which are sequentially performed.
In the present invention, the softening agent used for the softening treatment is preferably a hydrophilic softening agent. In the invention, the dosage of the softening agent is preferably 20-25 g/L. The beta value is preferably improved by 0.02-0.03 through softening treatment.
In the invention, the equipment used for the pre-shrinking treatment is preferably a pre-shrinking machine.
In the invention, the washing temperature of the washing shrinkage rate is preferably 70-75 ℃; the washing time of the washing shrinkage is preferably 50-60 min. The washing shrinkage process is favorable for ensuring the shrinkage of the final product and avoiding the reduction of the fluorescence of the final product due to the change of the density of the fabric.
After finishing, the invention preferably dries the knitted fabric after finishing. In the invention, the drying temperature is preferably 130-135 ℃; the drying time is preferably 120-150 s.
The stacking temperature of the cold batch dyeing is controlled, so that the brightness of the fluorescent yellow is ensured; the flame retardant property of the knitted fabric is ensured and the great attenuation of the fluorescence degree in the flame retardant process is avoided by controlling the mass concentration of the flame retardant; by controlling the ammonia flux of the ammonia fumigation cross-linking, the decrease of the fluorescence is avoided.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: squeezing water, drying at 130 ℃ for 120s, setting the cloth width at 180cm, and carrying out color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3893, Y: 0.4876, β: 0.756.
example 2
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 27 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing with an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: rolling water, then drying at 130 ℃ for 120s, setting the width of the cropping cloth to be 180cm, and carrying out a color cloth fluorescence test X: 0.3630, Y: 0.5202, beta: 0.942 to;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation crosslinking: ammonia flow rate of 70m 3 H, the moisture content is 8%, and the cloth falls and is opened into a cold water roller;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3891, Y: 0.5016, beta: 0.8024, fluorescence test after 40 hours sun test X: 0.3934, Y: 0.4812, beta: 0.7508.
example 3
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to a mass ratio of 4:1, wherein the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: squeezing water, drying at 130 ℃ for 120s, setting the cloth width at 180cm, and carrying out color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 45%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3903, Y: 0.4862, beta: 0.751.
comparative example 1
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 15 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: rolling water, then drying at 130 ℃ for 120s, setting the width of the cropping cloth to be 180cm, and carrying out a color cloth fluorescence test X: 0.3578, Y: 0.4833, beta: 0.82;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3738, Y: 0.4765, beta: 0.659.
comparative example 2
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the padding liquor rate is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 35 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing with an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) and (3) sizing and drying dyed cloth: squeezing water, drying at 130 ℃ for 120s, setting the cloth width at 180cm, and carrying out color cloth fluorescence test X: 0.3672, Y: 0.5048, beta: 0.86 of the total weight of the mixture;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3886, Y: 0.4896, beta: 0.683.
comparative example 3
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) and (3) sizing and drying dyed cloth: rolling water, then drying at 130 ℃ for 120s, setting the width of the cropping cloth to be 180cm, and carrying out a color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 25%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3887, Y: 0.4874, β: 0.757.
comparative example 4
(1) Pretreatment: putting 200kg of knitted fabric into a jar containing 10kg of caustic soda and 0.5kg of oil removal scouring agent for scouring, and scouring for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: squeezing water, drying at 130 ℃ for 120s, setting the cloth width at 180cm, and carrying out color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a fire retardant with the mass concentration of 50%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 70m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3894, Y: 0.4898, beta: 0.677.
comparative example 5
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the padding liquor rate is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: rolling water, then drying at 130 ℃ for 120s, setting the width of the cropping cloth to be 180cm, and carrying out a color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 60m 3 The moisture content is 8 percent, and a cold water roller is started for doffing;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → one cylinder of cold water → 3kg of glacial acetic acid is discharged;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 ℃ for 120s to obtain a final product, and testing the fluorescence degree by X: 0.3768, Y: 0.4895, beta: 0.748.
comparative example 6
(1) Pretreatment: boiling 200kg of knitted fabric in a jar filled with 10kg of caustic soda and 0.5kg of degreasing scouring agent for 60min at the temperature of 97 ℃; then placing the knitted fabric in a cylinder containing 10kg of hydrogen peroxide, 15kg of stabilizer and 5kg of scouring enzyme for oxygen bleaching, and treating for 40min at 98 ℃ to obtain a bleached knitted fabric with the whiteness of 87%, the pH value of 7 and the capillary effect of not less than 12cm/30 min;
(2) shaping and drying: the bleached knitted fabric obtained in the step (1) is firstly subjected to water squeezing, the falling width is 180cm, and then the knitted fabric is dried for 120s at the temperature of 130 ℃ to obtain a dried knitted fabric;
(3) cold batch dyeing: padding the dried knitted fabric obtained in the step (2) in a dye liquor for dyeing, wherein the dyeing temperature is 60 ℃, the mangle expression is 100%, and the tension is 0; the dye solution consists of dye and alkali liquor according to the mass ratio of 4:1, the dye consists of remainders fluorescent yellow FL 55g/L and iron ion chelating dispersant 1g/L, and the alkali liquor consists of caustic soda 21g/L and water glass 100 g/L; after dyeing is finished, stacking for 25h at 22 ℃, and running at constant speed; the width of the cold-piled rolled material is controlled to be 180cm, and the rolled and piled width is not less than 140 cm;
(4) washing by an overflow machine: cold water 2 jar → 95 ℃ x 10min one jar → glacial acetic acid 6kg 50 ℃ x 10min → 60 ℃ x 10min one jar → glacial acetic acid 2kg cold water runs for 10min to discharge cloth;
(5) shaping and drying the dyed cloth: squeezing water, drying at 130 ℃ for 120s, setting the cloth width at 180cm, and carrying out color cloth fluorescence test X: 0.3675, Y: 0.5046, beta: 0.906;
(6) and (3) flame retardant treatment: padding a flame retardant with the mass concentration of 35%, wherein the mangle rolling rate is 95%, and the moisture content of the cropping cloth is 12%;
(7) ammonia fumigation and crosslinking: ammonia flow rate of 90m 3 H, the moisture content is 8%, and the cloth falls and is opened into a cold water roller;
(8) and (3) oxidation: oxidizing by 40g/L of hydrogen peroxide at 30 ℃ for 15min → a cold water tank → 1kg of sodium hydroxide in cold water until the pH is 6-7 → a water washing tank at 40 ℃ → a water washing tank at 80 ℃ for 30min, wherein the bath ratio is 1: 15;
(9) washing formaldehyde: twice at 95 ℃ for 30min → a cold water tank → 3kg of glacial acetic acid for discharging;
(10) rolling a softening agent by a setting machine: the dosage of the hydrophilic softening agent is 20 g/L;
(11) pre-shrinking by a pre-shrinking machine;
(12) washing shrinkage of an overflow machine: washing at 70 deg.C for 50 min;
(13) shaping and drying: drying at 130 deg.C for 120s to obtain final product.
Fluorescence test of flame-retardant finished product X: 0.3975, Y: 0.4878, beta: 0.682.
the flame retardant performance of the flame retardant knitted fabrics prepared in examples 1-3 and comparative examples 1-6 is tested by GB 8965.1-2020 flame retardant clothing, the fluorescence of the flame retardant knitted fabrics prepared in examples 1-3 and comparative examples 1-6 is respectively tested by European Standard EN ISO 20471:2013 high visibility clothing-test method and requirement and American Standard ANSI107-2020 safety clothing and fittings suitable for high visibility, and the test results are shown in Table 1.
TABLE 1 Properties of flame-retardant knitted fabrics prepared in examples 1 to 3 and comparative examples 1 to 6
Flame retardant rating Fluorescence degree
Example 1 National standard B grade European and American standard satisfaction
Example 2 National standard B grade European and American standards meet
Example 3 National standard B grade European and American standards meet
Comparative example 1 National standard B grade European and American standard not satisfied
Comparative example 2 National standard B grade European and American standard does not satisfy
Comparative example 3 National standard class B unsatisfied European and American standard satisfaction
Comparative example 4 National standard B grade European and American standard does not satisfy
Comparative example 5 National standard class B unsatisfied European and American standards meet
Comparative example 6 National standard B grade European and American standard does not satisfy
The method provided by the invention improves the fluorescence of the flame-retardant knitted fabric, and the fluorescence of the treated knitted fabric can pass European and American standards; after the knitted fabric is treated by the method provided by the invention, the brightness beta value of the knitted fabric is not lower than 0.7, the knitted fabric passes the initial test after flame retardance, and the European standard hernia lamp can pass through the test after continuously irradiating for 20 hours and the American standard hernia lamp can pass through the test after continuously irradiating for 40 hours.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims (10)

1. A method for improving the fluorescence yellow fluorescence intensity of flame-retardant knitted fabric comprises the steps of sequentially carrying out cold batch dyeing, flame-retardant treatment, ammonia fumigation crosslinking, oxidation, formaldehyde washing and after-treatment on the knitted fabric;
the stacking temperature of the cold batch dyeing is 22-27 ℃;
the mass concentration of the flame retardant used for flame retardant treatment is 35-45%;
the ammonia flow of the ammonia fumigation cross-linking is 70-75 m 3 /h。
2. The method according to claim 1, characterized in that the dye liquor used for the cold batch dyeing comprises the following components in percentage by mass (4-5): 1 and alkali liquor.
3. The method of claim 2, wherein the dye comprises: 50-60 g/L of ramalin fluorescent yellow FL and 1-1.5 g/L of iron ion chelating dispersant; the alkali liquor comprises: 21-25 g/L of caustic soda and 100-110 g/L of water glass.
4. The method according to claim 1, wherein the afterrolling ratio of the cold batch dyeing is 95-100%, and the stacking time of the cold batch dyeing is 22-30 h.
5. The method according to claim 1, wherein the mangle ratio of the flame retardant treatment is 95-98%, and the moisture content of the falling cloth is 12-14%.
6. The method of claim 1, wherein the moisture content of the ammonia fumigation cross-linking is 8-10%.
7. The method according to claim 1, wherein the concentration of the oxidizing agent used for the oxidation is 40-45 g/L, and the bath ratio of the oxidation is 1: (15-20) and the temperature of oxidation is 30-35 ℃.
8. The method according to claim 1 or 7, characterized in that the oxidation is carried out by: oxidizing with an oxidizing agent → washing with cold water → washing with alkali → washing with water at 40-42 deg.C → washing with water at 80-82 deg.C.
9. The method according to claim 1, wherein the water temperature for washing the formaldehyde is 95-98 ℃, the frequency for washing the formaldehyde is 2-3 times, and the time for washing the formaldehyde is 30-40 min each time.
10. The method according to claim 1, wherein the after-treatment comprises a softening treatment, a pre-shrinking treatment and a wash-shrinking rate which are performed in sequence.
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