CN110924192A - Online dyeing method for cationic viscose spunlace nonwoven fabric - Google Patents
Online dyeing method for cationic viscose spunlace nonwoven fabric Download PDFInfo
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- CN110924192A CN110924192A CN201911231985.8A CN201911231985A CN110924192A CN 110924192 A CN110924192 A CN 110924192A CN 201911231985 A CN201911231985 A CN 201911231985A CN 110924192 A CN110924192 A CN 110924192A
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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
- D06P1/38—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 reactive dyes
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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
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/66—Natural or regenerated cellulose using reactive dyes
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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
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
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Abstract
The invention discloses an online dyeing method of a cationic viscose spunlace nonwoven fabric, which comprises the following steps: feeding cotton → opening and carding → lapping → drafting → water jet strengthening → padding dye liquor → fixation → soaping → washing → drying → coiling; the on-line dyeing method of the cationic viscose spunlace non-woven fabric can realize on-line dyeing of the viscose spunlace non-woven fabric and improve the production efficiency of the colored viscose spunlace non-woven fabric. The cationic viscose is adopted to improve the adsorption capacity of the cationic viscose to dye and improve the color fastness of dyeing. And the color fixing is carried out by adopting a non-aqueous medium, so that the color fixing fastness can be improved, the water consumption and the wastewater discharge are reduced, and the environment-friendly performance is achieved.
Description
Technical Field
The invention relates to the technical field of non-woven fabric dyeing, in particular to an online dyeing method of a cationic viscose spunlace non-woven fabric.
Background
With the continuous increase of economy and the continuous improvement of the living standard of people, the demand of non-woven fabrics, especially non-woven fabrics with colors is increasing. The existing non-woven fabrics with colors are generally non-woven fabrics prepared by a spun-bonded or melt-blown production process, and can have various colors by adding color master batches during production. The nonwoven fabrics produced by the two methods have hard hand feeling.
The spunlace nonwoven fabric is soft in hand feeling, and one method for producing the colored spunlace nonwoven fabric is to use colored fibers as raw materials. This method has the disadvantage that it takes a lot of time to clean the colored fibers in the spunlace production line, especially in the opening, scutching and carding devices, when the product is changed, which is not good for improving the production efficiency. If the cleaning is not thorough, the cleaning effect on the non-woven fabric of the next color can be generated, and a large number of non-woven fabrics have defects of other colors. This problem can be avoided if the present white fibers are used to produce a nonwoven and then dyed.
However, since the nonwoven structure of the spunlace nonwoven fabric determines the weak point of low wet strength, it cannot be dyed by various conventional textile dyeing machines.
The viscose fiber as a cellulose fiber has the moisture absorption performance, moisture regain and other physiological requirements similar to those of cotton, has excellent affinity with human body, has the characteristics of coolness, air permeability and the like, and becomes a widely applied textile material. But also has the defects of poor color fastness, poor color and luster, poor crease resistance and shape retention, and the like. Especially if the viscose spunlace non-woven fabric is dyed by the conventional viscose, the color fastness is not high.
Disclosure of Invention
The invention aims to provide an on-line dyeing method of a cationic viscose spunlace non-woven fabric, which can enable the produced spunlace non-woven fabric to be dyed on line, meet the requirement on dyeing fastness and greatly improve the production efficiency of the non-woven fabric.
In order to solve the technical problem, the invention aims to realize that:
the invention relates to an online dyeing method of a cationic viscose spunlace nonwoven fabric, which comprises the following steps: feeding cotton → opening and carding → lapping → drafting → water jet strengthening → padding dye liquor → fixation → soaping → washing → drying → coiling;
the raw materials used include cationic viscose fibers; the padding dye solution contains reactive dye, leveling agent and penetrant; the content of the reactive dye is 0.01-50g/L, the content of the leveling agent is 0.5-1g/L, and the content of the penetrating agent is 1-2 g/L; the liquid carrying rate of the non-woven fabric after padding is 70-80%;
the color fixation is to fix the color of the non-woven fabric padded with the dye liquor by adopting non-aqueous medium; the fixation temperature during fixation is 140-150 ℃;
the soaping is to pad the non-woven fabric subjected to color fixation with a soaping solution, and the washing is to pad the non-woven fabric subjected to soaping with clear water;
the drying is carried out by adopting a rotary screen dryer and divided into three stages, wherein the temperature of the first stage is 175 ℃, the temperature of the second stage is 180-.
As a further illustration of the scheme, the fed raw materials also comprise ES fibers, and the content of the cationic viscose fibers is 85-95%.
As a further illustration of the above scheme, the leveling agent is an anionic leveling agent.
As a further illustration of the above scheme, the penetrant is an anionic surfactant.
As a further illustration of the above scheme, the non-aqueous medium used in fixation is a low viscosity, high boiling point, low surface tension organic solvent, which is an easily recoverable solvent that is neither miscible with water nor capable of dissolving the reactive dye:
the viscosity of the non-aqueous medium is<50mm2/s；
The boiling point of the nonaqueous medium is 150-300 ℃;
the surface tension of the non-aqueous medium is 15 to 25dyn/cm (25 ℃).
The invention has the beneficial effects that: the on-line dyeing method of the cationic viscose spunlace non-woven fabric can realize on-line dyeing of the viscose spunlace non-woven fabric and improve the production efficiency of the colored viscose spunlace non-woven fabric. The cationic viscose is adopted to improve the adsorption capacity of the cationic viscose to dye and improve the color fastness of dyeing. And the color fixing is carried out by adopting a non-aqueous medium, so that the color fixing fastness can be improved, the water consumption and the wastewater discharge are reduced, and the environment-friendly performance is achieved.
Detailed Description
The present invention is further illustrated by the following specific examples.
Example one
The online dyeing method of the cationic viscose spunlace nonwoven fabric related in the embodiment comprises the following steps: feeding cotton → opening and carding → lapping → drafting → hydroentangling → padding dye liquor → fixation → soaping → washing → drying → coiling.
The raw material used included cationic viscose fibres. And feeding the cationic viscose into a carding machine in a cotton box after the processes of cotton feeding, cotton opening and the like, wherein the used cotton box comprises an Erko last channel cotton box (EFS) and an Erko air pressure cotton box (EDS). The pressure of the pre-feed in the EFS was 4.6mbar and the pressure of the EFS height of the cotton feed was 3.4 mbar. The EDS pre-feeding is 1.3mbar, and the EDS cotton feeding height pressure is 2 mbar.
The speed of a loosening roller in the used carding machine is 125m/min, the speed of a chest cylinder working roller is 31m/min, the speed of a chest cylinder stripping roller is 125m/min, the speed of the chest cylinder is 320m/min, the speed of a transfer roller is 454m/min, the speed of a main cylinder working roller is 80m/min, the speed of the main cylinder stripping roller is 180m/min, the speed of the main cylinder is 950m/min, the speed of a doffer is 14.5m/min, the speed of a doffer is 16.8m/min, the speed of a condensing roller is 9.4m/min, the speed of a top take-off roller is 14m/min, the speed of a bottom take-off roller is 14.3m/min, the speed of an upper output curtain is 14m/min, the speed of a lower output curtain is 14.3m/min, and the speed of a compression roller is 14.7 m/min. The weight of the formed card web was 33 grams per square meter.
And (4) lapping the carded fiber web by a lapping machine to form a cross lapping mode web. The drawing coefficient of the web on the lapping machine was 10.8%. In this example the number of plies was 6 and the lap width was 5 cm. The lapping machine carries out a drafting machine through a transition curtain, and the drafting multiple of the transition curtain is 1.06.
In the drafting machine, the drafting modification coefficient is 1.65, the number of the drafting rollers from 1 to 7 are arranged, the drafting starts from the number 1 drafting roller, the drafting multiples are respectively 1.22, 1.15, 1.14, 1.13, 1.12, 1.11 and 1.1, and the total drafting of 2.47 times can be achieved.
And carrying out spunlace reinforcement on the drafted fiber web by using a spunlace machine, and carrying out spunlace reinforcement by using 7 spunlace heads, wherein the spunlace pressure is respectively 35bar/kg, 65bar/kg, 80bar/kg, 85bar/kg and 80 bar/kg. Wherein the needle plate used by the No. 1 spunlace head is double rows, and the aperture is 0.14 mm; the needle plate used by the No. 2 water stabs is single-row, and the aperture is 0.1 mm; the needle plate used by the No. 3 water stabs head is double-row, and the aperture is 0.08 mm; the needle plate used by the No. 4 spunlace head is single-row, and the aperture is 0.08 mm; the needle plate used by the No. 5 water stabs is double-row, and the aperture is 0.1 mm; the needle plate used by the No. 6 spunlace head is single-row, and the aperture is 0.12 mm; the needle plate used by No. 7 water stabs is single row, and the aperture is 0.1 mm.
Carrying out dip dyeing on a fiber net formed by spunlace, wherein the dip dyeing liquid contains a reactive dye, a leveling agent and a penetrating agent; the content of the reactive dye is 0.1g/L, the content of the leveling agent is 0.5g/L, and the content of the penetrating agent is 1 g/L; the liquid carrying rate of the nonwoven fabric after padding was 70%. The leveling agent is an anionic leveling agent, in particular to a higher alcohol sulfate sodium salt, and the anionic leveling agent has affinity to fibers and can improve the uniformity degree in the dyeing process of cellulose fibers. The penetrating agent is an anionic surfactant, namely TMC (thermal mechanical control) of Qingdao Feilong source chemical industry Co. The reactive dye is one of monochlorotriazine type reactive dye, dichloros-triazine type reactive dye, vinylsulfone type reactive dye, or double-reactive-group type reactive dye, and in this embodiment, is monochlorotriazine type reactive dye.
And carrying out color fixing treatment after padding the dye liquor. In the embodiment, the color fixation is to fix the color of the non-woven fabric padded with the dye liquor by using a non-aqueous medium; the color fixing temperature in the color fixing process is 150 ℃, and the color fixing time is 1 s. The non-aqueous medium used in color fixation is an organic solvent with low viscosity, high boiling point and low surface tension, and is an easily-recycled solvent which is not mutually soluble with water and can not dissolve reactive dyes: the viscosity of the non-aqueous medium is<50mm2S; the boiling point of the nonaqueous medium is 150-300 ℃; the surface tension of the non-aqueous medium is 15 to 25dyn/cm (25 ℃). Specifically D5.
And (4) soaping the non-woven fabric after fixation to remove floating color on the surface of the non-woven fabric fiber. So that the non-woven fabric can not fade after fixation. And soaping is to pad the non-woven fabric subjected to color fixation with a soaping liquor. The soaping contained 0.1% of soap flakes.
The water washing is to pad the non-woven fabric after the soap washing with clean water and wash away some chemicals on the surface of the fiber.
The drying is carried out by adopting a rotary screen dryer and divided into three stages, wherein the temperature of the first stage is 175 ℃, the temperature of the second stage is 180 ℃, and the temperature of the third stage is 140 ℃.
Example two
The difference between the online dyeing method of the cationic viscose spunlace nonwoven fabric related in the embodiment and the first embodiment is as follows:
carrying out dip dyeing on a fiber net formed by spunlace, wherein the dip dyeing liquid contains a reactive dye, a leveling agent and a penetrating agent; the content of the reactive dye is 50g/L, the content of the leveling agent is 0.5g/L, and the content of the penetrating agent is 1 g/L; the liquid carrying rate of the nonwoven fabric after padding is 80%. The leveling agent is an anionic leveling agent, in particular to a higher alcohol sulfate sodium salt, and the anionic leveling agent has affinity to fibers and can improve the uniformity degree in the dyeing process of cellulose fibers. The penetrating agent is an anionic surfactant, namely TMC (thermal mechanical control) of Qingdao Feilong source chemical industry Co. The reactive dye is one of monochlorotriazine type reactive dye, dichloros-triazine type reactive dye, vinylsulfone type reactive dye or double-reactive-group type reactive dye, and is dichloro s-triazine type reactive dye in the embodiment.
And carrying out color fixing treatment after padding the dye liquor. In the embodiment, the color fixation is to fix the color of the non-woven fabric padded with the dye liquor by using a non-aqueous medium; the fixation temperature is 140 ℃ and the fixation time is 2 s. The non-aqueous medium used in color fixation is an organic solvent with low viscosity, high boiling point and low surface tension, and is an easily-recycled solvent which is not mutually soluble with water and can not dissolve reactive dyes: the viscosity of the non-aqueous medium is<50mm2S; the boiling point of the nonaqueous medium is 150-300 ℃; the surface tension of the non-aqueous medium is 15 to 25dyn/cm (25 ℃). Specifically D5.
And (4) soaping the non-woven fabric after fixation to remove floating color on the surface of the non-woven fabric fiber. So that the non-woven fabric can not fade after fixation. And soaping is to pad the non-woven fabric subjected to color fixation with a soaping liquor. The soaping contained 0.5% of soap flakes.
The water washing is to pad the non-woven fabric after the soap washing with clean water and wash away some chemicals on the surface of the fiber.
The drying is carried out by adopting a rotary screen dryer and divided into three stages, wherein the temperature of the first stage is 175 ℃, the temperature of the second stage is 205 ℃, and the temperature of the third stage is 145 ℃.
EXAMPLE III
The difference between the online dyeing method of the cationic viscose spunlace nonwoven fabric related in the embodiment and the first embodiment is as follows: the fed raw materials also comprise ES fibers, and the content of the cationic viscose fibers is 85-95 percent, particularly 90 percent. The addition of the ES fibers can prevent the surface of the non-woven fabric from falling off chips.
Carrying out dip dyeing on a fiber net formed by spunlace, wherein the dip dyeing liquid contains a reactive dye, a leveling agent and a penetrating agent; the content of the reactive dye is 30g/L, the content of the leveling agent is 0.8g/L, and the content of the penetrating agent is 1.5 g/L; the liquid pick-up rate of the nonwoven fabric after padding was 75%. The leveling agent is an anionic leveling agent, in particular to a higher alcohol sulfate sodium salt, and the anionic leveling agent has affinity to fibers and can improve the uniformity degree in the dyeing process of cellulose fibers. The penetrating agent is an anionic surfactant, namely TMC (thermal mechanical control) of Qingdao Feilong source chemical industry Co. The reactive dye is one of monochlorotriazine type reactive dye, dichloros-triazine type reactive dye, vinylsulfone type reactive dye, or double-reactive group type reactive dye, and in this embodiment, is double-reactive group type reactive dye.
And carrying out color fixing treatment after padding the dye liquor. In the embodiment, the color fixation is to fix the color of the non-woven fabric padded with the dye liquor by using a non-aqueous medium; the fixation temperature is 145 ℃ and the fixation time is 2 s. The non-aqueous medium used in color fixation is an organic solvent with low viscosity, high boiling point and low surface tension, and is an easily-recycled solvent which is not mutually soluble with water and can not dissolve reactive dyes: the viscosity of the non-aqueous medium is<50mm2/s；The boiling point of the nonaqueous medium is 150-300 ℃; the surface tension of the non-aqueous medium is 15 to 25dyn/cm (25 ℃). Specifically D5.
And (4) soaping the non-woven fabric after fixation to remove floating color on the surface of the non-woven fabric fiber. So that the non-woven fabric can not fade after fixation. And soaping is to pad the non-woven fabric subjected to color fixation with a soaping liquor. The soaping contained 0.3% of soap flakes.
The water washing is to pad the non-woven fabric after the soap washing with clean water and wash away some chemicals on the surface of the fiber.
The drying is carried out by adopting a rotary screen dryer and divided into three stages, wherein the temperature of the first stage is 175 ℃, the temperature of the second stage is 190 ℃, and the temperature of the third stage is 145 ℃.
Comparative example
The dyed viscose non-woven fabric related to the comparative example adopts the following process by adopting common viscose fiber: cotton feeding → cotton opening → carding → lapping → drafting → water jet strengthening → padding color paste → drying → coiling. The color paste used is the same as that used for printing the non-woven fabric.
The nonwoven fabrics prepared in the first, second, third and comparative examples were subjected to dyeing property tests, which included:
(1) apparent color depth and dyeing unevenness of the non-woven fabric: measuring the K/S value of the dyed fabric on a computer color measuring and matching instrument under the test conditions that a D65 light source and a 10-degree visual angle are adopted, folding a cloth sample into 4 layers, measuring for 10 times, taking an average value, calculating the relative deviation of the average value of the K/S value, and representing the uneven dyeing degree of the fabric.
(2) Absorbance of the residual liquid: and (4) measuring the absorbance of residual liquid of the dyed non-woven fabric after being washed by hot water on an ultraviolet visible spectrophotometer, wherein the wavelength is 630 nm.
(3) Color fastness to rubbing: measured according to GB/T3920-2008 ' color fastness to rubbing ' of textile color fastness test '.
The specific test results are given in the following table:
the K/S value is used to indicate the dye uptake, and a larger value indicates a better dyeing effect. The hot water washing can remove a small amount of auxiliary agents and dyes on the surface of the fabric, and is favorable for improving the color fastness to rubbing. The larger the K/S value, the smaller the absorbance of the residue. The better the color fastness, the lower the absorbance of the residue, since the better the color fastness, the smaller the color floating on the fiber surface, the less the color floating that can be washed off by washing with hot water, and the lower the absorbance.
As can be seen from the table above, the nonwoven fabrics prepared in the first and second examples have higher K/S value and rubbing fastness, lower residual liquid absorbance, less color floating on the surface of the visible fiber, and higher color fastness than the comparative examples.
The nonwoven fabrics prepared in the first, second and third examples and the comparative example were washed with water 5 times according to AATCC61-2A standard method, and then were subjected to a color fastness test. The test results are shown in the following table
As can be seen from the above table, after 5 times of washing, the color fastness of the examples one, two and three was not significantly reduced, while the color fastness of the comparative example was reduced by one grade. Therefore, the polyester fabrics prepared in the first embodiment, the second embodiment and the third embodiment have color fastness to washing.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. An on-line dyeing method of a cation viscose spunlace non-woven fabric is characterized by comprising the following steps: feeding cotton → opening and carding → lapping → drafting → water jet strengthening → padding dye liquor → fixation → soaping → washing → drying → coiling;
the raw materials used include cationic viscose fibers; the padding dye solution contains reactive dye, leveling agent and penetrant; the content of the reactive dye is 0.01-50g/L, the content of the leveling agent is 0.5-1g/L, and the content of the penetrating agent is 1-2 g/L; the liquid carrying rate of the non-woven fabric after padding is 70-80%;
the color fixation is to fix the color of the non-woven fabric padded with the dye liquor by adopting non-aqueous medium; the fixation temperature during fixation is 140-150 ℃;
the soaping is to pad the non-woven fabric subjected to color fixation with a soaping solution, and the washing is to pad the non-woven fabric subjected to soaping with clear water;
the drying is carried out by adopting a rotary screen dryer and divided into three stages, wherein the temperature of the first stage is 175 ℃, the temperature of the second stage is 180-.
2. The method for dyeing cationic viscose spunlace nonwoven fabric in-line as claimed in claim 1, wherein the fed raw material further comprises ES fibers, and the content of the cationic viscose fibers is 85-95%.
3. The method for dyeing a cationic viscose spunlace nonwoven fabric on line according to claim 1, wherein the leveling agent is an anionic leveling agent.
4. The method of claim 1, wherein the penetrant is an anionic surfactant.
5. The on-line dyeing method of cationic viscose spunlace nonwoven fabric according to claim 1, characterized in that the non-aqueous medium used for fixation is an organic solvent with low viscosity, high boiling point and low surface tension, which is an easily-recycled solvent that is not miscible with water and can not dissolve reactive dyes:
the viscosity of the non-aqueous medium is<50mm2/s；
The boiling point of the nonaqueous medium is 150-300 ℃;
the surface tension of the non-aqueous medium is 15 to 25dyn/cm (25 ℃).
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