阅读说明：本技术 一种棉针织布防沾色染整工艺 (Dyeing and finishing process for preventing staining of cotton knitted fabric ) 是由 李晛 于 2020-12-04 设计创作，主要内容包括：本发明涉及一种棉针织布防沾色染整工艺,属于染整工艺技术领域；它的流程为：坯布预处理、染色、第一次开幅、防沾色染色处理、第二次开幅、烘干、定型柔软处理、定型防沾色处理。螯合剂和防沾色剂赛奥旦R一起大副缸水化开缓慢加入,加完行机10min后开始加元明粉,加完行机10min后开始加纯碱固色,加完行机10min后升温；以1.0℃/min升温到60℃,保温40min,剪板,小杯皂洗,对色；赛奥旦R在使用过程中不会引起浅色,白色面料黄变；原理是使用过量的无色活性染料充分与纤维素纤维上的羟基反应,阻断水洗互染过程中游离的活性染料沾色；定型使用防水剂8858N整理,使面料具备,防水,防油,防污的能力,在水洗互染过程中延缓水与面料接触的时间,阻断游离活性染料扩散到纤维内部。(The invention relates to a dyeing and finishing process for preventing staining of cotton knitted fabrics, belonging to the technical field of dyeing and finishing processes; the process comprises the following steps: the method comprises the following steps of grey cloth pretreatment, dyeing, first scutching, anti-staining dyeing treatment, second scutching, drying, sizing softening treatment and sizing anti-staining treatment. Adding the chelating agent and the stain-resistant agent Saudidan R into a large auxiliary cylinder slowly after hydration, adding the sodium sulphate after 10min, adding the soda after 10min for fixation, and heating after 10 min; heating to 60 deg.C at a rate of 1.0 deg.C/min, maintaining for 40min, shearing, soaping in a small cup, and coloring; the seocalton R does not cause light color in the using process, and the white fabric is yellow; the principle is that excessive colorless active dye is used to fully react with hydroxyl on cellulose fiber, and free active dye is prevented from staining in the washing mutual dyeing process; the water-proofing agent 8858N is used for finishing in shaping, so that the fabric has the capabilities of water proofing, oil proofing and stain proofing, the contact time of water and the fabric is delayed in the water washing mutual dyeing process, and the free reactive dye is prevented from diffusing into the fiber.)

1. A dyeing and finishing process for preventing staining of cotton knitted fabric is characterized in that: the method comprises the following specific operation steps:

step S1 grey cloth pretreatment: immersing the grey cloth in water of 80 ℃ for 10 minutes, fishing out, pre-shaping and standing to normal temperature;

step S2 dyeing: putting the cloth into a high-temperature high-pressure airflow dyeing machine, heating to 50 ℃, adding a cloth boiling auxiliary agent while heating, heating to 98 ℃, preserving heat for 45min, and shearing the plate to match colors;

cooling to 80 ℃ at a speed of 1.0 ℃/min after no problem of whiteness of the boiled cloth, then overflowing and washing to 60 ℃ for water discharge, passing the water through HAC after washing two cylinders, raising the temperature to 55 ℃, carrying out machine for 10min, testing and adjusting the pH value to 6.0-8.0, directly adding the oxygen removing enzyme without discharging the water, continuing to keep the temperature at 55 ℃, carrying out machine for 10min, and testing and adjusting the oxygen content to be less than or equal to 0.05; adding water and water to start dyeing; fully dissolving the whitening agent with large and auxiliary vat water at 80 deg.C, adding, heating to 80 deg.C, heating to 98 deg.C at 1.5 deg.C/min, and keeping the temperature for 20 min;

step S3 scutching for the first time: scutching, shearing and color matching the cloth in the step S2;

step S4 initial setting: after color matching, performing primary setting treatment on the cloth by using a Fuji 8-box setting machine of a letter door, adjusting the pressure of a press roll to be 2Bar, controlling the temperature to be 90-120 ℃, and performing roller-passing one-time cooling treatment at the speed of 8-12 m/min;

step S5 staining prevention treatment: putting the all-cotton knitted fabric after primary shaping in the step S4 into clear water of a high-temperature high-pressure airflow dyeing machine, and starting anti-staining process finishing when the temperature is raised to 40 ℃;

adding chelating agent and anti-staining agent Saocalang R into a large auxiliary cylinder by hydration, adding anhydrous sodium sulphate 10min later, adding anhydrous sodium sulphate 4 parts (1/10, 2/10, 3/10 and 4/10) 10min later, adding sodium carbonate 40min later, and adding sodium carbonate 10min later; 4 portions of soda ash (1/10, 2/10, 3/10 and 4/10) are divided into 10min portions, the addition of each portion is completed for 40min, and the temperature is increased after 10 min; heating to 60 deg.C at a rate of 1.0 deg.C/min, maintaining for 40min, shearing, soaping in a small cup, and coloring;

step S6 scutching for the second time: using an expander to expand the fabric dyed in the step S5;

step S7 drying: drying by using a needle plate type setting machine;

step S8 shaping and softening treatment: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 140-150 ℃, the vehicle speed is 20-25m/min, the pressure of a compression roller of the setting machine is 2-3 Bar, and the liquid carrying rate is controlled to be 70-75%; use of hydrophilic softeners: 20-30 g/L of smoothing agent DM-3260;

step S9 sizing anti-staining process: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 150-; the dosage of the auxiliary agent is as follows: 30-50 g/L of Demei waterproofing agent 8858N.

2. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: when the cloth boiling assistant is added in the step S1, the penetrant and the anti-wrinkling agent are quickly added, the water in the large auxiliary tank for caustic soda is slowly added for 10min, the hydrogen peroxide stabilizer and the hydrogen peroxide are added together, and the scouring and dyeing one-bath detergent is quickly added after the temperature reaches 75 ℃.

3. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: and in the initial setting of the step S4, the elasticity of the fabric is controlled after the fabric is opened for the first time. And (4) performing one-time roll-pass shaping through low-speed and low-pressure operation.

4. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: the whitening agent in step S2 may be a triazine stilbene type whitening agent.

5. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: the dosage of the chelating agent and the stain-resistant agent Seaodan R in the step S5 is 3.5-5%, the material is dissolved by warm water at 50 ℃ before being added, and the slow addition is about 20min when the material is added.

6. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: in the step S5, the colorless active dye in the Saoxaden R fully reacts with hydroxyl on the cellulose fiber and is combined with the cellulose fiber through a covalent bond, so that free active dye staining in the water washing mutual dyeing process is blocked, and the staining resistance and washing fastness are good.

7. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: the waterproof agent in the shaping and softening treatment of the step S8 is a methylol melamine derivative or an organic silicon waterproof agent.

8. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: and S9, adding a hydrophilic softening agent in the sizing anti-staining treatment, solving the hand feeling problem of the fabric, not influencing the liquid carrying rate of the fabric in the sizing anti-staining finishing process, and fully ensuring the sizing anti-staining finishing effect.

9. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: the process comprises the following steps: grey cloth pretreatment → dyeing → first scutching → primary sizing → staining prevention treatment → second scutching → drying → sizing softening treatment → sizing staining prevention treatment.

10. The dyeing and finishing process for preventing staining of cotton knitted fabric according to claim 1, characterized in that: the process comprises the following steps: grey cloth pretreatment → dyeing → first scutching → staining prevention treatment → second scutching → drying → shaping softening treatment → shaping staining prevention treatment.

Technical Field

The invention relates to a dyeing and finishing process for preventing staining of cotton knitted fabrics, and relates to the technical field of fabric dyeing and finishing processes.

Background

With the diversified development of society, the demands of people on clothes color and style are more diversified, and the clothes are colorful. The costume designer can design different styles according to the preference and the color popularity of people, and clothes with different colors are selected by consumers. The phenomenon that different colors such as black splicing white, red splicing white, green splicing white and the like are spliced on one piece of clothes is also common. The dark pastel or white proportions even reach: 25/1, 30/1. How to solve the problem that the deep color is spliced into white color, and the deep color and the light color are mutually dyed when the household washing is carried out is a difficult problem which is continuously solved by the printing and dyeing industry at present.

Meanwhile, with the continuous attention of people on environmental protection, more and more people can select healthier garment materials, the all-cotton knitted fabrics have huge market share, and the usage amount of the reactive dye in the cotton fabric dyeing is more in an increasing trend. The problem of dark and light color matching mutual dyeing becomes a problem which needs to be solved at present.

The daily household washing powder consumption still occupies a large share, and through sampling tests on different brands of washing powder on the market, the pH value of 1g/L washing powder solution is between 9 and 10 and is alkaline. And the reactive dye is very easy to hydrolyze under the action of alkaline electrolyte. In the process of washing clothes, the active dye after hydrolysis of the dark fabric is dissociated in water to contaminate the light or white fabric. With the darker fabric dyed, the deeper the dye consumption, the more the active dye is hydrolyzed during the washing process, the more the light-colored or white fabric is stained, even the color of the light-colored white fabric is changed, and the appearance of the clothes is seriously affected. The reactive dye is the most prominent in the problem of mutual dyeing of reactive turquoise blue G and reactive brilliant red FB by washing with water.

In the process of designing the clothes, the diversification of the color matching of the clothes is required to be met, and the primary problem to be solved is to solve the problem that the color matching and the water washing are mutually dyed.

Disclosure of Invention

The invention aims to provide a dyeing and finishing process for preventing staining of cotton knitted fabrics, which solves the problem of staining of light-colored fabrics from dyeing and shaping links, aiming at the defects and shortcomings of the prior art.

In order to realize the purpose, the anti-staining dyeing and finishing process for the cotton knitted fabric, which is adopted by the invention, comprises the following specific operation steps:

step S1 grey cloth pretreatment: immersing the grey cloth in water of 80 ℃ for 10 minutes, fishing out for presetting and standing to normal temperature.

Step S2 dyeing: putting the cloth into a high-temperature high-pressure airflow dyeing machine, heating to 50 ℃, adding a cloth boiling auxiliary agent while heating, heating to 98 ℃, preserving heat for 45min, and shearing the plate to match colors;

cooling to 80 ℃ at a speed of 1.0 ℃/min after no problem of whiteness of the boiled cloth, then overflowing and washing to 60 ℃ for water discharge, passing the water through HAC after washing two cylinders, raising the temperature to 55 ℃, carrying out machine for 10min, testing and adjusting the pH value to 6.0-8.0, directly adding the oxygen removing enzyme without discharging the water, continuing to keep the temperature at 55 ℃, carrying out machine for 10min, and testing and adjusting the oxygen content to be less than or equal to 0.05; the dyeing (whitening) is started after water is discharged and fed; fully dissolving the whitening agent with large and auxiliary tank water at 80 deg.C, adding (slowly adding for 10min), heating to 80 deg.C, heating to 98 deg.C at 1.5 deg.C/min, and keeping the temperature for 20 min;

step S3 scutching for the first time: scutching, shearing and color matching the cloth in the step S2;

step S4 initial setting: after color matching, performing primary setting treatment on the cloth by using a Fuji 8-box setting machine of a letter door, adjusting the pressure of a press roll to be 2Bar, controlling the temperature to be 90-120 ℃, and performing roller-passing one-time cooling treatment at the speed of 8-12 m/min;

step S5 staining prevention treatment: putting the all-cotton knitted fabric after primary shaping in the step S4 into clear water of a high-temperature high-pressure airflow dyeing machine, and starting anti-staining process finishing when the temperature is raised to 40 ℃;

adding chelating agent and anti-staining agent Saocalang R into a large auxiliary cylinder by hydration, adding anhydrous sodium sulphate 10min later, adding anhydrous sodium sulphate 4 parts (1/10, 2/10, 3/10 and 4/10) 10min later, adding sodium carbonate 40min later, and adding sodium carbonate 10min later; 4 portions of soda ash (1/10, 2/10, 3/10 and 4/10) are divided into 10min portions, the addition of each portion is completed for 40min, and the temperature is increased after 10 min; heating to 60 deg.C at 1.0 deg.C/min, maintaining for 40min, shearing, soaping in a small cup, and coloring.

Step S6 scutching for the second time: using an expander to expand the fabric dyed in the step S5;

step S7 drying: drying by using a needle plate type setting machine;

step S8 shaping and softening treatment: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 140-150 ℃, the vehicle speed is 20-25m/min, the pressure of a compression roller of the setting machine is 2-3 Bar, and the liquid carrying rate is controlled to be 70-75%; use of hydrophilic softeners: 20-30 g/L of smoothing agent DM-3260;

step S9 sizing anti-staining process: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 150-; the dosage of the auxiliary agent is as follows: 30-50 g/L of Demei waterproofing agent 8858N.

Preferably, when the cloth boiling assistant is added in the step S1, the penetrant and the anti-creasing agent are quickly added, the water in the large auxiliary tank for caustic soda is slowly added for 10min, the hydrogen peroxide stabilizer and the hydrogen peroxide are added together, and the scouring and dyeing one-bath detergent is quickly added after the temperature reaches 75 ℃.

Preferably, in the initial setting in step S4, the elasticity of the fabric is controlled after the fabric is first opened. And (4) shaping by a low-speed and low-pressure overpressure roller.

Preferably, the whitening agent in step S2 may be a triazine aminostilbene type whitening agent.

Preferably, the dosage of the chelating agent and the stain resistant agent Seaodan R in the step S5 is 3.5-5%, the material is dissolved by warm water at 50 ℃ before being added, and the slow addition is about 20min when the material is added.

Preferably, in the step S5, the leuco reactive dye in seobitan R fully reacts with hydroxyl groups on the cellulose fibers, and is covalently bonded with the cellulose fibers, so that staining of free reactive dyes during mutual washing dyeing is blocked, and staining resistance and washing fastness are good.

Preferably, the water repellent in the setting and softening treatment in step S8 is a methylol melamine derivative or an organosilicon water repellent.

Preferably, in the step S9, a hydrophilic softener is added in the sizing and anti-staining treatment, so that the problem of fabric hand feeling is solved, the liquid carrying rate of the fabric in the sizing and anti-staining finishing process is not affected, and the sizing and anti-staining finishing effect is fully guaranteed.

Preferably, in step S5, the chelating agent is hydroxycarboxylic acid salts such as tartaric acid, heptonate, sodium gluconate, sodium alginate, etc., and has strong complexing ability; or organic phosphates such as sodium Ethylene Diamine Tetra Methylene Phosphate (EDTMPS), diethylenetriamine pentamethylene phosphate (DETPMS), amine trimetaphosphate, etc., and the chelation of the products is stronger than that of EDTA and phosphates.

The invention relates to a dyeing and finishing process for preventing staining of cotton knitted fabric, which comprises the following steps: grey cloth pretreatment → dyeing → first scutching → primary sizing → staining prevention treatment → second scutching → drying → sizing softening treatment → sizing staining prevention treatment.

The invention relates to a dyeing and finishing process for preventing staining of cotton knitted fabric, which comprises the following steps: grey cloth pretreatment → dyeing → first scutching → staining prevention treatment → second scutching → drying → shaping softening treatment → shaping staining prevention treatment.

After the process is adopted, the invention has the beneficial effects that:

1. the dyeing principle of the staining-resistant agent Seaodan R used in the dyeing staining-resistant process is consistent with that of the reactive dye, and the staining-resistant agent Seaodan R is also combined with the cellulose fiber by a covalent bond, so that the staining-resistant and washing-resistant properties are good.

2. The anti-staining agent Seaodan R can be understood as a colorless tasteless reactive dye, and does not cause light color and yellow stain of white fabrics in the using process.

3. The principle of the stain-resistant agent Seaodan R stain resistance is that excessive colorless reactive dye is used to fully react with hydroxyl on cellulose fiber, and free reactive dye staining in the washing mutual dyeing process is blocked.

4. The water-proofing agent 8858N is used for finishing in shaping, so that the fabric has the capabilities of water proofing, oil proofing and stain proofing, the contact time of water and the fabric is delayed in the water washing mutual dyeing process, and the free reactive dye is prevented from diffusing into the fiber.

5. The hydrophilic softening agent is used before the sizing anti-staining finishing to solve the hand feeling problem of the fabric, the liquid waiting rate of the fabric in the sizing anti-staining finishing process is not influenced, and the sizing anti-staining finishing effect is fully ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a flow diagram of another embodiment of the present invention.

Detailed Description

The invention uses different cotton fabrics for comparison:

scheme 1: the grammage specification of the all-cotton double-faced cloth is used: 220 g/square meter

Scheme 2: the grammage specification of the all-cotton double-toilet suit is used: 320 g/square meter

Scheme 3: the grammage specification of the all-cotton plain cloth is used: 180 g/square meter

Referring to fig. 1, the following processes are used for the dyeing and finishing operation in scheme 1 and scheme 2:

pretreating gray fabric: immersing the grey cloth in water of 80 ℃ for 10 minutes, fishing out for presetting and standing to normal temperature.

Dyeing: adding the cloth into a high-temperature high-pressure airflow dyeing machine, heating to 50 ℃, adding a cloth boiling auxiliary agent (firstly, quickly adding a penetrating agent and a crease-resist agent, slowly adding water in a large auxiliary tank for caustic soda treatment for 10min, adding a hydrogen peroxide stabilizer and hydrogen peroxide together, quickly adding a scouring and dyeing one-bath detergent after the temperature reaches 75 ℃), heating to 98 ℃, keeping the temperature for 45min, and shearing the plate; after the whiteness is not in problem, the temperature is reduced to 80 ℃ at the speed of 1.0 ℃/min, then the overflow washing is carried out to 60 ℃ for water discharge, the water passes through HAC after washing two cylinders, the temperature is raised to 55 ℃, the machine is carried out for 10min, after the pH value is tested and adjusted to be 6.0-8.0, the oxygen removing enzyme is directly added without water discharge, the temperature is continuously kept at 55 ℃, the machine is carried out for 10min, and after the oxygen content is tested and adjusted to be less than or equal to 0.05; the dyeing (whitening) is started after water is discharged and fed; fully dissolving the whitening agent with large and auxiliary tank water at 80 deg.C, adding (slowly adding for 10min), heating to 80 deg.C, heating to 98 deg.C at 1.5 deg.C/min, and keeping the temperature for 20 min;

scutching for the first time: scutching, shearing and color matching the cloth in the step S2;

primary sizing: after color matching, performing primary setting treatment on the cloth by using a Fuji 8-box setting machine of a letter door, adjusting the pressure of a press roll to be 2Bar, controlling the temperature to be 90-120 ℃, and performing roller-passing one-time cooling treatment at the speed of 8-12 m/min;

staining prevention and dyeing treatment: putting the all-cotton knitted fabric after primary shaping in the step S4 into clear water of a high-temperature high-pressure airflow dyeing machine, and starting anti-staining process finishing when the temperature is raised to 40 ℃; adding a chelating agent and a stain-resistant agent Saocalon R (the dosage is 3.5-5%) into a large auxiliary cylinder by hydration (the materials are dissolved by warm water at 50 ℃ and slowly added for 20min), adding anhydrous sodium sulphate 10min later, adding 4 parts of anhydrous sodium sulphate (1/10, 2/10, 3/10 and 4/10), adding 10min for each part, adding 40min later, and adding sodium carbonate 10min later; 4 portions of soda ash (1/10, 2/10, 3/10 and 4/10) are divided into 10min portions, the addition of each portion is completed for 40min, and the temperature is increased after 10 min; heating to 60 deg.C at 1.0 deg.C/min, maintaining for 40min, shearing, soaping in a small cup, and coloring.

And (3) second scutching: using an expander to expand the fabric dyed in the step S5;

drying: drying by using a needle plate type setting machine;

shaping and softening treatment: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 140-150 ℃, the vehicle speed is 20-25m/min, the pressure of a compression roller of the setting machine is 2-3 Bar, and the liquid carrying rate is controlled to be 70-75%; use of hydrophilic softeners: 20-30 g/L of smoothing agent DM-3260;

shaping and anti-staining treatment: using a vertical letter door Fuji 8-box setting machine, wherein the setting temperature of the setting machine is 150-; the dosage of the auxiliary agent is as follows: 30-50 g/L of Demei waterproofing agent 8858N.

As shown in fig. 2, the process flow adopted in scheme 3 is as follows: grey cloth pretreatment → dyeing → first scutching → staining prevention treatment → second scutching → drying → shaping softening treatment → shaping staining prevention treatment.

The examples 1-3 were compared with similar facing materials on the market as comparative examples; the items tested and compared are as follows:

bursting strength: measured according to GB/T19976-2005 steel ball method for measuring bursting strength of textiles.

Change of washing size: according to GB/T8628-2001, equipment, marking and measurement of fabric samples and clothes in tests for measuring dimensional changes of textiles, GB/T8629-2001, domestic washing and drying procedures for testing textiles, and GB/T8630-2002, measurement of dimensional changes of textiles after washing and drying.

Color fastness to light: GB/T8427-2008 method 3 (refer to the level 4 blue wool standard).

Mutual dyeing fastness: GB/T31127-2014 method A.

The dyeing principle of the stain-resistant agent Seaodan R used in the process is consistent with that of the reactive dye, and the stain-resistant agent Seaodan R is also combined with the cellulose fiber by a covalent bond, so that the stain resistance and the washability are good; the seoxaden R is a colorless and tasteless active dye, does not cause light color in the using process, and the white fabric is yellowed; the principle is that excessive colorless active dye is used to fully react with hydroxyl on cellulose fiber, and free active dye is prevented from staining in the washing mutual dyeing process; the fabric is finished by using a waterproof agent 8858N for sizing, so that the fabric has the capabilities of water resistance, oil resistance and fouling resistance, the contact time of water and the fabric is delayed in the water washing mutual dyeing process, and the free reactive dye is prevented from diffusing into the fiber; the hydrophilic softening agent is used before the sizing anti-staining finishing to solve the hand feeling problem of the fabric, the liquid waiting rate of the fabric in the sizing anti-staining finishing process is not influenced, and the sizing anti-staining finishing effect is fully ensured.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.