CN119777177A

CN119777177A - Printed nylon/cotton blended fabric and production process thereof

Info

Publication number: CN119777177A
Application number: CN202411829268.6A
Authority: CN
Inventors: 巫资伟
Original assignee: Fujian Huafeng New Material Co ltd
Current assignee: Fujian Huafeng New Material Co ltd
Priority date: 2024-12-12
Filing date: 2024-12-12
Publication date: 2025-04-08

Abstract

The present invention relates to a new printed nylon/cotton blended fabric and a production process thereof, comprising the following steps: sizing, digital printing, steaming, washing, color fixation, and shaping. Different from the prior art, in the present technical solution, the pH of the active sizing agent is controlled at 8.0-9.0, so that the reactive groups in the nylon fiber and the active groups in the active dye undergo nucleophilic substitution or nucleophilic addition reaction, thereby forming a strong covalent bond between the dye molecule and the nylon fiber. Therefore, the nylon fiber and the cotton fiber can be printed synchronously under alkaline conditions.

Description

Printing nylon/cotton blended fabric and production process thereof

Technical Field

The invention relates to the field of textiles, in particular to a printed nylon/cotton blended fabric and a production process thereof.

Background

At present, in the textile field, nylon fabrics are generally printed by adopting acid dyes under the acid condition, cotton fabrics are generally printed by adopting reactive dyes under the alkaline condition, the respective production processes are very mature, and the nylon fabrics occupy a large proportion in textile printing in China. For the printing of the nylon fiber/cotton fiber interweaved fabric, when the nylon content is large (usually more than 90%), the cotton fiber can be ignored and the acid dye can be adopted for printing independently, and similarly, when the cotton content is large (usually more than 90%), the nylon fiber can be ignored and the reactive dye can be adopted for printing independently. However, when the nylon fiber content is relatively close to the cotton fiber content, a single acid dye or reactive dye cannot be adopted for printing, otherwise, only one fiber can be dyed, and the other fiber is exposed, so that the cloth cover becomes a hemp color, and the appearance quality of a printed product is seriously affected.

Disclosure of Invention

In view of the above problems, the application provides a novel printed nylon/cotton blended fabric and a production process thereof, which synchronously print nylon fibers and cotton fibers under alkaline conditions and meet the color fastness requirement.

The first aspect of the application provides a production process of a printed nylon/cotton blended fabric, which comprises the following steps:

sizing, namely sizing nylon/cotton blended fabric by using active sizing agent to obtain the sized fabric, wherein the active sizing agent is prepared by mixing urea, sodium bicarbonate, sodium alginate and soft water, and the pH value of the active sizing agent is controlled to be 8.0-9.0;

Digital printing, namely performing ink-jet printing on the sized fabric by using active ink matched with a digital printer to obtain the printed fabric, wherein the active ink contains active dye, and the active group of the active dye is s-triazine active group and/or vinyl sulfone active group;

Steaming, namely steaming the printed fabric to obtain a steamed fabric;

Washing water, namely washing the steamed fabric to obtain washed fabric;

color fixation, namely performing 2 times of color fixation on the washed fabric at the pH of 4-5 and 50-60 ℃ by using a color fixing agent to obtain a color-fixed fabric;

and (3) shaping, namely performing heat drying and shaping on the color-fixed fabric to obtain the printed nylon/cotton blended fabric.

Compared with the prior art, the pH of the active sizing agent is controlled to be 8.0-9.0 in the technical scheme, so that amide groups (-CONH-) in the nylon fiber are hydrolyzed, some acidic groups (such as terminal carboxyl groups and the like) on the surface of the fiber are ionized, and the surface of the fiber is negatively charged. And the active dye has positive charged s-triazine active group or vinyl sulfone active group and amide group or active site generated after hydrolysis undergo nucleophilic substitution or nucleophilic addition reaction, so that a firm covalent bond is formed between dye molecules and nylon fibers. Therefore, nylon fibers and cotton fibers can be printed synchronously with reactive dyes in alkaline environments.

Further, in the sizing step, the active sizing agent contains 5-10% of urea, 2-4% of sodium bicarbonate, 3-6% of sodium alginate and the balance of soft water.

Further, in the sizing step, the active sizing agent further comprises anti-staining salt.

Further, in the sizing step, 5-10% of urea, 2-4% of sodium bicarbonate, 1-2.5% of dye-resistant salt, 3-6% of sodium alginate and soft water are uniformly mixed to obtain the active sizing agent.

Further, in the digital printing step, the active group is a monochloro-s-triazine active group.

Further, the steaming step is carried out, wherein the steaming step is carried out, and the printed fabric is steamed for 5-12min by using 102-107 ℃ saturated steam.

Further, the washing step sequentially comprises a first cold washing step, a first soaping step, a second soaping step and a second cold washing step.

Further, the washing time of the first cold water washing is 8-12min, 2 times, the first soaping is 8-10 min at 50 ℃ and 2 times, the second soaping is 8-10 min at 80 ℃ and 2 times, and the washing time of the second cold water washing is 5min and 1 time.

Further, in the color fixing step, the pH value is regulated by citric acid, the concentration of the color fixing agent is 2g/L, and the color fixing time is 20-30 min/time.

Further, in the shaping step, the heat drying shaping temperature is 100-110 ℃.

The second aspect of the application provides a printed nylon/cotton blended fabric, which is produced by adopting the production process of the first aspect of the application.

Compared with the prior art, the nylon fiber and the cotton fiber in the technical scheme are subjected to reactive printing synchronously in an alkaline environment, and the s-triazine type active group and/or the vinyl sulfone active group in the reactive dye are firmly combined with the nylon fiber and the cotton fiber, so that the printed patterns in the fabric are clear, bright in color and good in color fastness.

The foregoing summary is merely an overview of the present application, and may be implemented according to the text-recited content of the specification for the purpose of enabling those skilled in the art to more clearly understand the present application, and for the purpose of enabling the above-mentioned objects and other objects, features and advantages of the present application to be more readily understood, the following description is made in conjunction with the detailed description of the application and the accompanying drawings.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of the present application and are not to be construed as limiting the application.

In the drawings of the specification:

fig. 1 is a photograph of a printed nylon/cotton blend fabric prepared in example 1.

Detailed Description

In order to describe the possible application scenarios, technical principles, practical embodiments, and the like of the present application in detail, the following description is made with reference to the specific embodiments and the accompanying drawings. The embodiments described herein are only for more clearly illustrating the technical aspects of the present application, and thus are only exemplary and not intended to limit the scope of the present application.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of the phrase "in various places in the specification are not necessarily all referring to the same embodiment, nor are they particularly limited to independence or relevance from other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment may be combined in any manner to form a corresponding implementable technical solution.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application pertains, and the use of related terms herein is intended only to describe specific embodiments, not to limit the present application.

In the description of the present application, the term "and/or" is a representation for describing a logical relationship between objects, meaning that three relationships may exist, for example, a and/or B, meaning that there are a, B, and both a and B. In addition, the character "/" herein generally indicates that the front-to-back associated object is an "or" logical relationship.

In the present application, terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual number, order, or sequence of such entities or operations.

Without further limitation, the use of the terms "comprising," "including," "having," or other like terms in this specification is intended to cover a non-exclusive inclusion, such that a process, method, or article of manufacture that comprises a list of elements does not include additional elements but may include other elements not expressly listed or inherent to such process, method, or article of manufacture.

In the present application, the expressions "greater than", "less than", "exceeding" and the like are understood to exclude the present number, and the expressions "above", "below", "within" and the like are understood to include the present number, as well as the expressions "examining the guideline" and the like. Furthermore, in the description of embodiments of the present application, the meaning of "a plurality of" is two or more (including two), and similarly, the expression "a plurality of" is also to be understood as such, for example, "a plurality of" and the like, unless specifically defined otherwise.

The reactive dye is an important dye type, and the molecular structure of the reactive dye contains active groups capable of reacting with-OH, -NH ₂ and the like in fibers so as to form covalent bond combination, and the combination mode ensures that the dyed fastness is better, in particular to wet treatment fastness. The reactive dye has a structural general formula of S-D-B-R, S is a water-soluble group such as-SO ₃ Na, D is a dye matrix for determining the color, vividness, fastness and substantivity of the dye, B is a connecting group which is commonly-NH-, and R is an active group for determining the reactivity, fixation rate, hydrolysis resistance stability, storage stability and other performances of the dye.

Steaming, namely steaming the printed fabric to obtain a steamed fabric;

Washing water, namely washing the steamed fabric to obtain washed fabric;

The molecular structure of the nylon fiber contains amide (-CONH-) and other reactive groups. Under the weak alkaline condition, amide groups can generate a certain degree of hydrolysis reaction, so that partial chemical bonds in the molecular structure of the nylon fiber become more active and are easier to react with reactive dye molecules. Meanwhile, the weak alkaline environment can change the charge distribution on the surface of the nylon fiber. The surface charge of the original nylon fiber is relatively neutral under neutral conditions, but under the action of weak base, some acidic groups (such as terminal carboxyl groups and the like) on the surface of the fiber can be ionized, so that the surface of the fiber is negatively charged. This change in charge enhances the electrostatic interaction between the nylon fibers and positively charged reactive dye molecules, thereby facilitating the adsorption of the dye molecules to the fiber surface.

Under weakly alkaline conditions, the solubility and diffusivity of reactive dyes in the dye liquor can also be affected. On one hand, the alkaline environment is favorable for breaking or ionizing certain chemical bonds in the reactive dye molecules, so that the dye molecules are more easily dissolved in the dye liquor, the dye uptake of the dye is improved, the reactive groups of the dye (s-triazine reactive groups and/or vinyl sulfone reactive groups) have higher reactivity under the weak alkaline condition, and on the other hand, the diffusion speed of the dye molecules under the alkaline condition is also accelerated, the dye molecules can be more quickly permeated into the nylon fiber, and the dyeing is more uniform.

In the digital printing step, the nylon fiber surface is negatively charged under the weak alkaline condition and attracts with the positive charges carried by the reactive dye molecules, so that the dye molecules can be quickly gathered on the fiber surface to form a preliminary adsorption layer. Meanwhile, dye molecules adsorbed on the surface of the fiber gradually diffuse from the surface of the fiber to the inside of the fiber under the pushing of the concentration difference. This is a slow process, and factors such as temperature, dye concentration, auxiliaries, etc. all affect the diffusion rate of the dye. The purpose of the diffusion is to enable the dye to be distributed uniformly inside the fiber, so that a good dyeing effect is obtained.

In the steaming step, active groups in active dye molecules adsorbed on the surface of the fiber react chemically with reactive groups on the nylon fiber to form covalent bonds. The reactive dye can be firmly combined with the fiber, so that bright color and good dyeing fastness are obtained.

In the fixation step, fixation treatment is required to ensure more stable covalent bond between the dye and the nylon fiber. The color fixing process can further improve the fastness properties of the dye, such as washing resistance, rubbing resistance and the like.

Further, in the sizing step, the active sizing agent further comprises anti-staining salt. The anti-staining salt is a weak oxidant, and has the function of resisting oxidization and preventing some sensitive reactive dyes from being damaged by reduced substances to change color in the steaming step. The addition is necessary for dyeing sensitive colors, such as grey.

Furthermore, the fabric after sizing needs to be digitally printed within 30min or stored in a sealed environment with the humidity of 50-70%, so that the active sizing agent is prevented from absorbing moisture in the air to cause deterioration. Too much water in the reactive sizing agent can cause problems such as pattern bleeding or insufficient color depth in the digital printing step.

The sizing of the fabric is divided into single-sided sizing and double-sided sizing. The single-sided sizing is to uniformly cover the sizing agent on the surface of the fabric through a screen mesh by a rotary screen or a flat screen printing machine or a layer drawing machine under the pressure of a magnetic rod or a scraper. The double-sided sizing is also called padding sizing (rolling surplus rate is 80% -90%), the sizing is extruded onto the fabric by a padder, and the double-sided sizing process can also be used for digital printing by refitting a tentering setting machine.

In sizing, the problem of fabric weft inclination is to be noted, once the fabric weft inclination is caused, the fabric cannot be flatly laid on a conduction band in the subsequent printing process, uneven is formed, a spray head is easy to wipe, and the pattern quality and the service life of the spray head are affected.

The reactive group of the monochlorotriazine is weak, is suitable for dyeing at high temperature (more than 90 ℃), can react with fibers under the condition of strong alkalinity, is also called thermosetting reactive dye, is not easy to hydrolyze, has good storage stability, and has better hydrolysis stability of a covalent bond of the dye-fiber than dichloro-s-triazine.

In the steaming process, saturated steam at the temperature of 102-107 ℃ is steamed for 5-12min, so that the reactivity of active groups in the dye can be better activated, and the amide groups in the nylon fibers are promoted to be hydrolyzed and the acidic groups are promoted to be ionized.

In the steaming process, the active ink printed on the surface of the fabric absorbs water and swells, and the dye is dissolved in the pattern range of the active ink and diffuses and permeates into the fiber. At the same time, the macromolecular structure of the fiber increases under such wet and hot conditions, and the internal voids receive and bond with the penetration of the dye, thereby fixing the dye to the fiber.

In the color fixing process, factors such as temperature, time, pH value and the like of the dye liquor can influence the color fixing effect. The color fixing effect can be improved by properly increasing the temperature and prolonging the color fixing time, but the performance of the nylon fiber can be damaged due to the excessively high temperature and the excessively long time. Thus, the fixation temperature is set to 50-60 ℃ and the fixation time is set to 20-30 min/time.

Further, in the shaping step, the heat drying shaping temperature is 100-110 ℃. Too high a drying temperature can cause yellowing of the fabric, so the set temperature does not exceed 110 ℃.

Compared with the prior art, the nylon fiber and the nylon fiber in the technical scheme synchronously perform reactive printing in an alkaline environment, and the s-triazine type active group and/or vinyl sulfone active group in the reactive dye are firmly combined with the nylon fiber and the cotton fiber, so that the printed patterns in the fabric are clear, bright in color and good in color fastness.

In this embodiment, the reactive ink uses the NOVACRON series of Huntsman (hendsman) whose reactive group is a monochloro-s-triazine reactive group. The soaping agent is ALBATEXAD soaping agent of Huntsman (hensite), the anti-staining salt is LYOPRINT RG anti-staining salt of Huntsman (hensite), and the fixing agent is ERIONALFRN fixing agent of Huntsman (hensite). The digital printing machine adopts an MS digital printing machine JP6.

In the embodiment, the cloth cover of the nylon/cotton blended fabric is clean and free of impurities, and is dried (110 ℃ for drying), and the weft inclination of the cloth cover of the nylon/cotton blended fabric is controlled within the standard that the knitting is less than or equal to 3% and the tatting is less than or equal to 1%.

Example 1 printed chinlon/cotton blended fabric

The preparation of the active sizing agent comprises the steps of adding 10kg of urea, 3kg of sodium bicarbonate and 2kg of anti-staining salt into 82kg of soft water, uniformly mixing, adding 3kg of sodium alginate, stirring at a high speed for 30min, standing for 3h, and removing bubbles to obtain the active sizing agent, wherein the pH value of the active sizing agent is controlled to be 8.0-9.0;

Sizing, namely sizing the nylon/cotton blended fabric by using active sizing agent to obtain the sized fabric;

digital printing, namely performing ink-jet printing on the sized fabric by using active ink in combination with a digital printer to obtain a printed fabric;

Steaming, namely steaming the printed fabric for 8 minutes by using 102 ℃ steam to obtain steamed fabric;

washing, namely washing the steamed fabric, wherein the washing comprises the following steps:

The first cold water washing is to wash for 10min with cold water for 2 times;

first soaping, namely soaping for 8 minutes at 50 ℃ for 2 times;

Second soaping, namely soaping for 8 minutes at 80 ℃ for 2 times;

The second cold water washing, namely washing for 5 minutes with cold water for 1 time to obtain washed fabric;

The fabric after washing is put into a color fixing liquid with the pH value of 4-5 and the ERIONALFRN color fixing agent of 2g/L, and the color fixing is carried out for 20 minutes at 55 ℃, the pH value is regulated by citric acid, so that the fabric after washing is obtained;

And (3) shaping, namely performing heat shaping on the color-fixed fabric at 110 ℃ to obtain the printed nylon/cotton blended fabric, wherein a photo is shown in figure 1.

Example 2 printed chinlon/cotton blended fabric

The preparation of the active sizing agent comprises the steps of adding 8kg of urea, 2kg of sodium bicarbonate and 1kg of anti-staining salt into 86kg of soft water, uniformly mixing, adding 3kg of sodium alginate, stirring at a high speed for 30min, standing for 3h, and removing bubbles to obtain the active sizing agent, wherein the pH value of the active sizing agent is controlled to be 8.0-9.0;

steaming, namely steaming the printed fabric for 5 minutes by using 104 ℃ steam to obtain steamed fabric;

The first cold water washing is to wash for 10min with cold water for 2 times;

first soaping, namely soaping for 8 minutes at 50 ℃ for 2 times;

Second soaping, namely soaping for 8 minutes at 80 ℃ for 2 times;

And (3) shaping, namely performing heat shaping on the color-fixed fabric at 110 ℃ to obtain the printed nylon/cotton blended fabric.

Example 3 printed chinlon/cotton blended fabric

The preparation of the active sizing agent comprises the steps of adding 7.5kg of urea, 4kg of sodium bicarbonate and 2.5kg of anti-staining salt into 80kg of soft water, uniformly mixing, adding 6kg of sodium alginate, stirring at a high speed for 30min, standing for 3h, and removing bubbles to obtain the active sizing agent, wherein the pH value of the active sizing agent is controlled to be 8.0-9.0;

Steaming, namely steaming the printed fabric with saturated steam at 106 ℃ for 10min to obtain the steamed fabric, and washing the steamed fabric with washing water, wherein the washing water comprises the following steps:

The first cold water washing is to wash for 10min with cold water for 2 times;

first soaping, namely soaping for 8 minutes at 50 ℃ for 2 times;

Second soaping, namely soaping for 8 minutes at 80 ℃ for 2 times;

and (3) shaping, namely performing heat shaping on the color-fixed fabric at 110 ℃ to obtain the printed nylon/cotton blended fabric. Example 4 printed chinlon/cotton blended fabric

The preparation of the active sizing agent comprises the steps of adding 5kg of urea, 3kg of sodium bicarbonate and 1kg of anti-staining salt into 88kg of soft water, uniformly mixing, adding 3kg of sodium alginate, stirring at a high speed for 30min, standing for 3h, and removing bubbles to obtain the active sizing agent, wherein the pH value of the active sizing agent is controlled to be 8.0-9.0;

The starching step is to carry out starching on the nylon/cotton blended fabric by using the active starching material to obtain a starched fabric;

steaming, namely steaming the printed fabric with saturated steam at 103 ℃ for 12min to obtain the steamed fabric, and washing the steamed fabric with washing water, wherein the washing water comprises the following steps:

first soaping, namely soaping for 8 minutes at 50 ℃ for 2 times;

Second soaping, namely soaping for 8 minutes at 80 ℃ for 2 times;

The color fastness of the printed chinlon/cotton blended fabric prepared in examples 1-4 is detected, and the detection results are shown in table 1:

TABLE 1 color fastness detection results Table

Detecting items	Detection result
		Fastness to dry rubbing	Grade 4
Wet rub color fastness	Grade 4
		Fastness to water	Grade 4
Fastness to seawater immersion	Grade 4
		Perspiration fastness to alkali	Grade 4
Fastness to light	Grade 4
		Fastness to washing with soap	Grade 4

Wherein, the color fastness to soaping is tested according to national standard GB/T3921.4-1997. The dry/wet rub color fastness was carried out according to national standard GB/3920. The seawater immersion fastness is carried out according to national standard AATCC 106-2002. The fastness to light is carried out according to JIS (37+ -2) deg.C.times.4 h. The fastness to light is carried out according to ISO105B 02-1994. The perspiration color fastness (alkali) is carried out according to national standard ISO 105-E04:2008.

Finally, it should be noted that, although the embodiments have been described in the text and the drawings, the scope of the application is not limited thereby. The technical scheme generated by replacing or modifying the equivalent structure or equivalent flow by utilizing the content recorded in the text and the drawings of the specification based on the essential idea of the application, and the technical scheme of the embodiment directly or indirectly implemented in other related technical fields are included in the patent protection scope of the application.

Claims

1. A production process for printed nylon/cotton blended fabric, characterized in that it comprises the following steps:

Sizing: sizing the nylon/cotton blended fabric with an active sizing material to obtain a sized fabric; the active sizing material is prepared by mixing urea, sodium bicarbonate, sodium alginate and soft water; the pH of the active sizing material is controlled at 8.0-9.0;

Digital printing: the sizing fabric is subjected to inkjet printing with active ink and a digital printer to obtain printed fabric; the active ink contains active dyes, and the active groups of the active dyes are s-triazine type active groups and/or vinyl sulfone active groups;

Steaming: steaming the printed fabric to obtain a steamed fabric;

Washing: Wash the steamed fabric to obtain washed fabric;

Color fixing: fixing the washed fabric twice with a color fixing agent at pH 4-5 and 50-60° C. to obtain a color fixed fabric;

Setting: The color-fixed fabric is subjected to heat drying and setting to obtain the printed nylon/cotton blended fabric.

2. The production process according to claim 1 is characterized in that, in the sizing step, the active sizing material contains 5-10% urea, 2-4% sodium bicarbonate, 3-6% sodium alginate, and the balance is soft water.

3. The production process according to claim 1 is characterized in that, in the sizing step, the active sizing material also includes anti-dyeing salt.

4. The production process according to claim 3, characterized in that, in the sizing step, 5-10% urea, 2-4% sodium bicarbonate, 1%-2.5% resist salt, 3-6% sodium alginate and soft water are mixed to obtain the active sizing material.

5. The production process according to claim 1, characterized in that in the digital printing step, the active group is a monochlorotriazine active group.

6. The production process according to claim 1 is characterized in that, in the steaming step, the printed fabric is steamed with saturated steam at 102-107°C for 5-12 minutes.

7. The production process according to claim 1 is characterized in that the washing step comprises, in sequence, a first cold water wash, a first soap wash, a second soap wash, and a second cold water wash.

8. The production process according to claim 7 is characterized in that the cleaning time of the first cold water wash is 8-12 minutes, washed twice; the first soap wash is soaped at 50°C for 8-10 minutes, washed twice; the second soap wash is soaped at 80°C for 8-10 minutes, washed twice, and the cleaning time of the second cold water wash is 5 minutes, washed once.

9. The production process according to claim 1, characterized in that in the color fixing step, the pH value is adjusted by citric acid, the concentration of the color fixing agent is 2 g/L, and the color fixing time is 20-30 min/time.

10. A printed nylon/cotton blended fabric, characterized in that the printed nylon/cotton blended fabric is produced by the production process described in any one of claims 1 to 9.