阅读说明：本技术 一种粘胶的染整工艺 (Dyeing and finishing process for viscose ) 是由 谭卫东 王中荣 王延启 邓涛 谭玉波 涂盛勋 隗方宇 于 2020-12-31 设计创作，主要内容包括：本发明属于纺织材料处理领域,具体公开了一种粘胶的染整工艺,包括以下步骤：S1、将粘胶基布放置在煮锅内,将水、精练剂、稳定剂混合注入煮锅内；S2、向促进剂内加水溶解,促进剂充分溶解后注入煮锅内,所述促进剂为三乙醇胺和碳酸钠的复合物；S3、将煮锅升温至50-60℃,将双氧水注入煮锅内；S4、将煮锅升温至80-90℃保温运行50-60min；S5、将煮锅降温至50℃,向煮锅内加入硫酸调节PH为6-7。采用本发明的方案,可以解决传统工艺中促进剂NaOH具有强碱性,对于粘胶这种人造纤维材料具有较大的损害的问题。(The invention belongs to the field of textile material treatment, and particularly discloses a dyeing and finishing process for viscose, which comprises the following steps: s1, placing the viscose base cloth in a boiler, mixing water, scouring agent and stabilizing agent, and injecting into the boiler; s2, adding water into the accelerant to dissolve the accelerant, and injecting the accelerant into a cooking pot after the accelerant is fully dissolved, wherein the accelerant is a compound of triethanolamine and sodium carbonate; s3, heating the boiler to 50-60 ℃, and injecting hydrogen peroxide into the boiler; s4, heating the saucepan to 80-90 ℃, and keeping the temperature for 50-60 min; s5, cooling the boiling pot to 50 ℃, and adding sulfuric acid into the boiling pot to adjust the pH value to 6-7. By adopting the scheme of the invention, the problem that the promoter NaOH has strong basicity and has great damage to the viscose rayon material in the traditional process can be solved.)

1. The dyeing and finishing process of the viscose is characterized by comprising the following steps:

s1, placing the viscose base cloth in a boiler, mixing water, scouring agent and stabilizing agent, and injecting into the boiler;

s2, adding water to dissolve the accelerant, and injecting the accelerant into the boiler after the accelerant is fully dissolved, wherein the accelerant is a compound of triethanolamine and sodium carbonate;

s3, heating the boiler to 50-60 ℃, and injecting hydrogen peroxide into the boiler;

s4, heating the saucepan to 80-90 ℃, and keeping the temperature for 50-60 min;

s5, cooling the boiling pot to 50 ℃, and adding sulfuric acid into the boiling pot to adjust the pH value to 6-7.

2. The dyeing and finishing process of viscose according to claim 1, characterized in that: the mass ratio of the water to the scouring agent to the stabilizing agent is 1050-: 2-3: 1, the mass ratio of the accelerator to the stabilizer is 6:1, the mass ratio of hydrogen peroxide to the stabilizer is 8-9: 1.

3. the dyeing and finishing process of viscose according to claim 1, characterized in that: the accelerator dissolves at a temperature of 50 ℃.

4. The dyeing and finishing process of viscose according to claim 1, characterized in that: in S5, the temperature of the boiling pot is firstly reduced to 70 ℃ and then the boiling pot is operated for 10min, and then the temperature is reduced to 50 ℃.

5. The dyeing and finishing process of viscose according to claim 1, characterized in that: the utility model discloses a pressure cooker, including boiling pan, rack, main shaft upper portion, main shaft lower part, the rack is installed in the boiling pan and is used for placing the viscose base cloth, and the rack is including rotating the main shaft of connection in the middle part of the boiling pan, and main shaft upper portion has a plurality of first bracing pieces along the circumference equipartition, and the main shaft lower part has a plurality of second bracing pieces along the circumference equipartition, and first bracing piece and second bracing piece.

6. The dyeing and finishing process of viscose according to claim 5, characterized in that: first bracing piece, second bracing piece all rotate to be connected on the main shaft, and first bracing piece, second bracing piece outside all overlap and are equipped with the cross-section for oval-shaped sleeve, and the sleeve both sides all are equipped with the arc recess.

7. The dyeing and finishing process of viscose according to claim 5, characterized in that: the upper portion of the main shaft is sleeved with a feeding barrel used for injecting a promoter, the feeding barrel and the main shaft are coaxially arranged, the feeding barrel and the saucepan are fixed, a plurality of blades are uniformly distributed and fixed on the portion, located in the feeding barrel, of the main shaft along the circumferential direction, and a discharge hole is formed in the lower end of the feeding barrel.

8. The dyeing and finishing process of viscose according to claim 7, characterized in that: the lower part of the feed barrel is communicated with a circulating pipe, the free end of the circulating pipe is positioned at the bottom of the boiler, the upper part of the feed barrel is communicated with a material return pipe, and the free end of the material return pipe is positioned at the upper part of the boiler.

Technical Field

The invention belongs to the field of textile material treatment, and particularly relates to a dyeing and finishing process of viscose.

Background

The viscose is a main variety of artificial fiber and is prepared by using natural fiber as a raw material, preparing soluble cellulose xanthate through the procedures of alkalization, aging, sulfonation and the like, dissolving the soluble cellulose xanthate in dilute alkali liquor to prepare viscose and carrying out wet spinning. Viscose is a common non-woven raw material and has the advantages of soft hand feeling, smoothness, coolness, air permeability, static resistance and the like.

Dyeing and finishing refers to a process mainly comprising chemical treatment of textile materials (fibers, yarns and fabrics), wherein the dyeing and finishing comprises pretreatment, dyeing, printing and finishing, wherein the pretreatment is also called scouring and bleaching, and the dyeing and finishing is mainly used for removing impurities on the textile materials, so that the subsequent dyeing, printing and finishing can be smoothly carried out, and an expected processing effect can be obtained. In the prior art, no pretreatment step is provided for rayon materials such as viscose, the rayon materials usually do not contain natural impurities, while cotton and hemp fabric materials contain natural impurities and need to be removed through pretreatment.

When viscose and cotton and linen fabrics are produced in part of textile workshops, natural impurities on the cotton and linen fabric materials are adhered to the viscose due to the fact that part of pipeline equipment is shared for reducing production cost, and the viscose needs to be pretreated. In the pretreatment of cotton and linen fabrics, a system of NaOH (accelerator) and hydrogen peroxide is usually used in combination with a scouring agent and a stabilizer (also called chelating dispersant), and NaOH has strong basicity, so that the artificial fiber material such as viscose has large damage, and the strength of viscose base fabric is reduced by about 50%.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a dyeing and finishing process of viscose, which aims to solve the problem that the strength of viscose base cloth is reduced by about 50 percent because an accelerant NaOH has strong basicity and has great damage to a viscose rayon material in the traditional process.

In order to achieve the purpose, the invention adopts the following technical scheme:

a dyeing and finishing process of viscose comprises the following steps: s1, placing the viscose base cloth in a boiler, mixing water, scouring agent and stabilizing agent, and injecting into the boiler; s2, adding water to dissolve the accelerant, and injecting the accelerant into the boiler after the accelerant is fully dissolved, wherein the accelerant is a compound of triethanolamine and sodium carbonate; s3, heating the boiler to 50-60 ℃, and injecting hydrogen peroxide into the boiler; s4, heating the saucepan to 80-90 ℃, and keeping the temperature for 50-60 min; s5, cooling the boiling pot to 50 ℃, and adding sulfuric acid into the boiling pot to adjust the pH value to 6-7.

Compared with the prior art, the invention has the following beneficial effects:

in the scheme, a compound of triethanolamine and sodium carbonate is used as an accelerant to replace NaOH in the prior art, so that damage of strong alkali to the viscose base cloth is reduced, the sodium carbonate has weak alkalinity, the viscose base cloth has a certain degreasing and emulsifying effect, the triethanolamine has an oil-removing and emulsifying effect, and impurities adhered to the viscose base cloth can be effectively removed under the matching of the triethanolamine and the sodium carbonate.

The scheme only reduces the strength of the viscose base fabric by 15 to 20 percent by improving the dyeing and finishing process under the condition of not influencing the dyeing and finishing effect, thereby greatly improving the product performance.

Drawings

Fig. 1 is a schematic view of the entire structure of a saucepan in the embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 1. boiling the pot; 2. a main shaft; 3. a first support bar; 4. stirring blades; 5. a sleeve; 6. a circulation pipe; 7. a blade; 8. a charging barrel; 9. a cover plate; 10. an arc-shaped groove; 11. a material return pipe; 12. a discharge port; 13. a second support bar.

Detailed Description

The invention is further described in detail below with reference to the accompanying drawings, and specific embodiments are given.

A dyeing and finishing process of viscose comprises the following steps:

s1, placing the viscose base cloth in the saucepan 1 shown in figure 1, specifically, installing a placing rack for placing the viscose base cloth in the saucepan 1, wherein the placing rack comprises a main shaft 2 rotatably connected to the middle part of the saucepan 1, a motor is fixed outside the saucepan 1, an output shaft of the motor is fixed with the main shaft 2, and the motor is used for driving the main shaft 2 to rotate.

A plurality of first supporting rods 3 are uniformly distributed on the upper part of the main shaft 2 along the circumferential direction, a plurality of second supporting rods 13 are uniformly distributed on the lower part of the main shaft 2 along the circumferential direction, the first supporting rods 3 and the second supporting rods 13 are arranged in a staggered manner along the axial projection of the main shaft 2, the first supporting rods 3 and the second supporting rods 13 are rotatably connected on the main shaft 2, sleeves 5 with oval cross sections are fixed on the outer sides of the first supporting rods 3 and the second supporting rods 13, the length of the sleeves 5 is smaller than that of the first supporting rods 3, second bracing piece 13's length, it is shown in combination figure 2, sleeve 5 major diameter's both sides all are equipped with arc recess 10, first bracing piece 3, second bracing piece 13 keep away from the one end of main shaft 2 and all have stirring leaf 4 along the circumference equipartition, be equipped with the determining deviation between the tip of stirring leaf 4 and sleeve 5, the viscose base cloth is hung and is established on sleeve 5, the edge of viscose base cloth and stirring leaf 4 should have certain distance, avoid the viscose base cloth to influence stirring leaf 4 and rotate.

The viscose base cloth is sequentially wound on the placing frame along the sequence of the first supporting rod 3, the second supporting rod 13, the first supporting rod 3, the second supporting rod 13 and the first supporting rod 3, the viscose base cloth is wound and hung up and down, so that the viscose base cloth can be better in full contact with liquid in the saucepan 1, and the viscose base cloth is suitable for viscose base cloth with a longer size. The end part of the viscose base cloth has a longer distance from the nearest first supporting rod 3, so that the end part of the viscose base cloth can be dragged to the bottom of the saucepan 1, and the viscose base cloth is prevented from falling off in the rotating process of the main shaft 2.

Mixing water, scouring agent and stabilizing agent, and injecting the mixture into the boiler 1, wherein the mass ratio of the water to the scouring agent to the stabilizing agent is 1050-: 2-3: 1, the scouring agent mainly comprises an anionic surfactant (formed by mixing water, fatty acid, C12-14 alcohol and sodium hydroxide in a ratio of 77: 15: 7: 1), has a powerful emulsification effect and better dispersion and permeability, so that the treated viscose base cloth has excellent permeability, the inside of the viscose base cloth can be degreased, and detached impurities can be further dispersed to avoid reattaching on the viscose base cloth.

The stabilizer mainly comprises beverage self-surfactant (composed of water and C)₉H₉NNa₄O₈Polyacrylic acid in a ratio of 70: 25: 5) and the stabilizer plays a role in regulating the pH value and can prevent hydrogen peroxide added in the subsequent steps from being catalytically decomposed by metal ions in water.

Starter motor, motor drive main shaft 2 rotates, main shaft 2 drives first bracing piece 3, the revolution of second bracing piece 13, stirring leaf 4 rotates the effort that the in-process received rivers and takes place to rotate, and then drive first bracing piece 3, the rotation of second bracing piece 13, sleeve 5 rotates thereupon, because sleeve 5 cross-section is ellipse circular, when sleeve 5's major diameter rotated from vertical state and is the horizontality, the position of viscose base cloth and sleeve 5 contact changes, and viscose base cloth and first bracing piece 3, interval between the axis of second bracing piece 13 changes, and then make the viscose base cloth produce certain motion, in order to avoid the long-time and first bracing piece 3 of viscose base cloth, the position of second bracing piece 13 contact can't receive better soaking. Simultaneously, arc-shaped grooves 10 are formed in two sides of the sleeve 5, and when the long diameter of the sleeve 5 rotates to be in a horizontal state, the contact area between the sleeve 5 and the viscose base cloth is reduced, so that the viscose base cloth can be better soaked in liquid contact.

S2, dissolving the accelerant at the temperature of 50 ℃, wherein the mass ratio of the accelerant to the stabilizing agent is 6:1, the accelerant is a compound of triethanolamine and sodium carbonate, and the accelerant is fully dissolved and then injected into the saucepan 1. Specifically, the upper portion of the main shaft 2 is sleeved with a feed barrel 8 for injecting a promoter, the feed barrel 8 and the main shaft 2 are coaxially arranged, the main shaft 2 and the feed barrel 8 are rotatably connected, a cover plate 9 is fixed at the upper end of the saucepan 1, the feed barrel 8 is fixed in the middle of the cover plate 9, a feed port (not shown in the figure) for feeding is arranged on the cover plate 9, and the feed port can be closed or opened in a conventional mode. The part of the main shaft 2, which is located in the feed barrel 8, is uniformly and circumferentially fixed with a plurality of blades 7, the lower end of the feed barrel 8 is provided with a discharge port 12, the lower part of the feed barrel 8 is communicated with a circulating pipe 6, the free end of the circulating pipe 6 is located at the bottom of the boiler 1, the upper part of the feed barrel 8 is communicated with a return pipe 11, the free end of the return pipe 11 is located at the upper part of the boiler 1, valves are respectively arranged in the discharge port 12, the circulating pipe 6 and the return pipe 11 so as to adjust the flow direction of liquid, the circulating pipe 6 and the return pipe 11 are in inverted L shapes, the horizontal parts of the circulating pipe 6 and the return pipe 11 are longer than the first supporting rod 3, and the horizontal parts of the circulating pipe 6 and the return pipe 11 are longer than the second supporting rod 13 so as to avoid interference between the first supporting rod 3 and.

The accelerant is placed into the feeding barrel 8, water is introduced into the feeding barrel 8 to dissolve the accelerant, the feeding barrel 8 is heated, a conventional heating mode can be adopted, or the feeding barrel 8 can be directly selected from a barrel body with a heating function in the prior art. At this moment, the discharge port 12, the circulating pipe 6, the valve in the feed back pipe 11 is all closed, the main shaft 2 rotates in-process and drives the blade 7 to rotate, and then stir promoter and water in the feed tank 8, accelerate dissolving of promoter, after promoter dissolves completely, open the valve in the discharge port 12 earlier, make promoter discharge to the saucepan 1 in, in this process, because the main shaft 2 lasts the rotation, even only in getting into the saucepan 1 downwards from same position, the promoter also can receive main shaft 2 pivoted influence and scatter in the saucepan 1, and viscose base cloth rotates along with the main shaft 2, also can be better and liquid contact. Then the valve in the discharge port 12 is closed, and the valves in the circulation pipe 6 and the return pipe 11 are opened.

At this moment, no liquid exists in the feed barrel 8, but the blade 7 still rotates along with the main shaft 2, and then negative pressure is formed in the feed barrel 8, so that the liquid at the bottom of the circulating pipe 6 is extracted to enter the feed barrel 8, when the liquid in the feed barrel 8 highly reaches the height of the material return pipe 11, the liquid is discharged to the upper part of the saucepan 1 through the material return pipe 11, and then the replacement of the upper and lower layer surfaces of the liquid in the saucepan 1 is realized, so that the mixing of various auxiliary agents in the saucepan 1 is more uniform, and meanwhile, the liquid is in better contact with the viscose base cloth in the vertical replacement process.

S3, heating the boiler 1 to 50-60 ℃, heating the boiler 1 by adopting a conventional heating mode such as electric heating, and the like, wherein the boiler 1 can also directly adopt a container with a heating function in the prior art, hydrogen peroxide is injected into the boiler 1, the mass ratio of the hydrogen peroxide to the stabilizer is 8-9:1, and the hydrogen peroxide bleaches the viscose base cloth after impurity removal in the steps S1 and S2 to prepare for subsequent treatment of the viscose base cloth.

S4, heating the saucepan 1 to 80-90 ℃, keeping the temperature for 50-60min, wherein the main shaft 2 rotates continuously in the process, the viscose base cloth keeps moving along with the main shaft, and better reaction is realized in the saucepan 1.

S5, cooling the boiler 1 to 70 ℃, running for 10min, then cooling to 50 ℃, gradually cooling twice to reduce the influence of sudden cooling on the reaction, gradually cooling to stop the reaction in the boiler 1, and adding sulfuric acid into the boiler 1 to adjust the pH to 6-7.

Experiments were carried out on the strength of the viscose base cloth:

example (b):

the dosage of each auxiliary agent is as follows: 15800L of water, 35kg of refining agent, 15kg of stabilizing agent, 90kg of accelerant and 125kg of hydrogen peroxide.

In S3, the temperature is 50 ℃; in S4, the temperature is 85 ℃, and the operation is carried out for 50 min.

Comparative example:

the only difference from the examples is that 200kg of NaOH solution is used as the accelerator.

Using viscose base fabrics with the same size and the same model, specifically selecting two models of viscose base fabrics, respectively marking as a model (70g pearl grains) and a model (60g pearl grains), after the viscose base fabrics are processed according to the steps, taking out the viscose base fabrics, and detecting the strength of the viscose base fabrics, wherein the detection mode adopts a conventional mode, which is not described in detail in the embodiment, the strength variation amplitude is calculated by (strength before treatment-strength after treatment)/strength before treatment, and the detection results are shown in the following table (wherein MD represents longitudinal tensile strength, and CD represents transverse tensile strength):

the above table shows that the effect of using NaOH on the viscose base cloth is large in the prior art, the strength is reduced by more than 30%, and by adopting the scheme of the invention, the strength of the viscose base cloth is reduced by only 15-20%, so that the product performance is greatly improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.