Novel mercerizing process and equipment

Abstract

The invention discloses a novel mercerizing process and equipment. The novel mercerizing process comprises the following steps: singeing a fabric, padding a scouring and bleaching working solution for desizing and bleaching, stacking in a steam box, washing with hot water, feeding cloth in a mercerizing machine, padding an alkali solution for steaming and mercerizing, washing with hot water, drying, tentering, shaping and cropping. The problems that resources are wasted and the environment is polluted due to the fact that an alkali flushing and absorbing system is adopted in an existing technology are solved, steaming mercerizing is carried out after alkali liquor padding is carried out once, the concentration of padding alkali liquor and the balance of steaming mercerizing time and temperature are controlled, and the mercerizing efficiency is improved. Finally, the dyeing degree of the finished fabric is higher (the obtained color depth is 1.5-3%), the fabric cover is smooth and clean, the color is full, the hand feeling is fluffy and the cotton feeling is excellent, and the mercerizing cost is reduced. Meanwhile, mercerizing process steps are reduced, on one hand, resources are fully utilized, and on the other hand, mercerizing process flows are reduced, so that the fabric mercerizing working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of textile process equipment, and in particular to a novel mercerizing process and equipment. Background Art

[0002] Mercerization refers to the process of treating cellulose fiber textiles with caustic soda solution under tension. There are two types of mercerization: fabric mercerization and yarn mercerization. Through mercerization, the material can obtain good gloss, dimensional stability, dyeing performance and excellent tensile strength.

[0003] The basic types of mercerizing equipment currently available include clip mercerizing machines, straight roller mercerizing machines, and curved roller mercerizing machines. There are two types of mercerizing processes: dry cloth mercerizing (dry cloth in) and wet cloth mercerizing (wet cloth in). The advantages of wet cloth mercerizing are good penetration of concentrated alkali solution, uniform treatment, low shrinkage, and good dyeing uniformity. However, the disadvantage is that the moisture in the fabric dilutes the alkali solution, increasing the burden of recycling. Therefore, dry cloth mercerizing is currently the main method of production. In terms of process arrangement, there are currently grey cloth mercerizing, pre-bleaching mercerizing, and post-bleaching mercerizing.

[0004] Different mercerizing methods have their own disadvantages. For example, the most widely used cloth clip mercerizing method has the cloth clip part that is prone to mechanical defects, the equipment occupies a large area, and uses an alkali flushing and absorption system. The alkali flushing is transported by a centrifugal pump. The light alkali must first be heated in a tank and then pumped into the cloth clip for spraying, so that the steam is dissipated in the workshop space and becomes mist. This process wastes energy and pollutes the environment. Another example is the straight rod mercerizing method, which has the problems of wide floor space and high energy consumption. In addition, debris during operation may also cause quality problems such as batch holes in the cloth. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the existing process adopts a flushing and absorbing alkali system, which wastes resources and pollutes the environment. The purpose is to provide a new mercerizing process and equipment to solve the problem that the existing process adopts a flushing and absorbing alkali system, which wastes resources and pollutes the environment.

[0006] The present invention is achieved through the following technical solutions:

[0007] A new type of mercerizing process, including singeing treatment of fabrics, dipping in scouring and bleaching solution for desizing and bleaching, stacking in a steamer, hot water washing, feeding the fabric into a mercerizing machine, dipping in alkali solution and steaming and mercerizing, cold water washing, hot water washing and drying, and stentering, shaping and dropping the fabric.

[0008] As one of the preferred technical solutions, the concentration of the soaking alkali solution is 230-235 g / L.

[0009] As one of the preferred technical solutions, the temperature of steam mercerizing is 96-100°C and the time is 85-95s.

[0010] As one of the preferred technical solutions, the scouring and bleaching working solution includes caustic soda, hydrogen peroxide, refining agent JG130, quick scouring agent and magnesium chloride.

[0011] As one of the preferred technical solutions, the quick training agent includes quick training agent KR-9BK and quick training agent KR-9DW.

[0012] As one of the preferred technical solutions, the concentration of caustic soda in the scouring and bleaching working solution is 16-18g / L, the concentration of hydrogen peroxide is 12-13g / L, the concentration of refining agent JG130 is 3g / L, the concentration of quick scouring agent KR-9BK is 3g / L, the concentration of quick scouring agent KR-9DW is 7g / L, the concentration of magnesium chloride is 1g / L, and the liquid carrying rate is 84-86%.

[0013] Another aspect of the present invention provides a new type of mercerizing equipment, including a singeing device for singeing fabrics, a descaling and bleaching machine for dipping the fabrics in a scouring and bleaching working solution, a first steamer, a washing machine for hot water washing, a mercerizing machine, an alkali rolling tank, a second steamer for steaming, a drying machine and a setting machine for stentering and setting.

[0014] As one of the preferred technical solutions, a guide roller assembly is arranged in the second steam box, and the guide roller assembly is used to perform S-shaped guided circulation steaming on the fabric.

[0015] As one of the preferred technical solutions, the guide roller assembly includes a plurality of cloth guide rollers, and the plurality of cloth guide rollers are staggeredly distributed on the upper and lower sides of the second steamer to ensure that the fabric is staggeredly wound upward or downward for guided feeding.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. After many experiments, the present invention only immerses the fabric once in alkali solution and then performs steaming and mercerizing. By controlling the balance of alkali solution concentration, steaming and mercerizing time and temperature, the finished fabric dyeing rate is finally made higher (the color depth is 1.5-30%), the fabric surface is smooth, the color is full, the hand feel is fluffy and the cotton feel is excellent, and the mercerizing cost is reduced.

[0018] 2. The mercerizing process steps are reduced, which on the one hand fully utilizes resources, and on the other hand reduces the mercerizing process flow and improves the efficiency of fabric mercerizing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the novel mercerizing equipment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the second steam box of the present invention.

[0022] Marks and corresponding parts names in the attached drawings:

[0023] 1- singeing equipment, 2- descaling and bleaching machine, 3- first steamer, 4- washing machine, 5- mercerizing machine, 6- alkali trough, 7- second steamer, 8- drying machine, 9- setting machine, 10- cloth guide roller. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0025] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] Example 1

[0028] This embodiment provides a new mercerizing process, and the selected fabrics are: C60 / T40 20*16 120*60

[0029] The mercerizing process step includes using a singeing device 1 to singe the fabric. In the singeing process, a four-pass singeing machine is used, the front side is burned twice, the back side is burned once, and the machine speed is 80m / min. The singeing process can quickly burn off the fluff on the surface of the fabric, making the fabric soft and comfortable.

[0030] In the desizing and bleaching machine 2, the scouring and bleaching working solution is immersed for desizing and bleaching. Specifically, the scouring and bleaching working solution includes caustic soda, hydrogen peroxide, refining agent JG130, quick scouring agent and magnesium chloride. The concentration of caustic soda in the scouring and bleaching working solution is 16-18g / L, the concentration of hydrogen peroxide is 12-13g / L, the concentration of refining agent JG130 is 3g / L, the concentration of quick scouring agent KR-9BK is 3g / L, the concentration of quick scouring agent KR-9DW is 7g / L, the concentration of magnesium chloride is 1g / L, and the liquid carrying rate is 84-86%.

[0031] Through scouring and bleaching treatment, the fabric can acquire a soft feel and good water absorption, providing qualified semi-finished products for subsequent processing. At the same time, it can enhance the fabric's ability to adsorb dyes, making it easier for dyes to penetrate into the fiber, thereby improving the uniformity and depth of dyeing.

[0032] The subsequent steps are: stacking in the first steamer 3, hot water washing, feeding the cloth into the mercerizing machine 5, soaking in alkali solution, steaming and mercerizing in the second steamer 7, hot water washing and drying, and stretching and shaping the cloth.

[0033] The most important step of this process is to soak the fabric in alkali solution and then steam mercerize it. In the existing cloth clip spray mercerization process, this step requires two alkali soaking tanks 6, which are first soaked in light alkali and then soaked in concentrated alkali. The alkali soaking tank 6 is mainly used to soak the fabric in alkali solution so that the alkali solution can evenly and quickly penetrate into the fabric to change the fiber structure of the fabric and improve its gloss, dimensional stability, strength and other properties. The concentration of light alkali is 100g / L, and the concentration of concentrated alkali is 210-220g / L. This process also requires the use of an alkali flushing and absorption system, which is transported by a centrifugal pump. The light alkali must be heated in the tank first and then pumped into the cloth clip for spraying, so that the steam is emitted in the workshop space to form mist. This process wastes energy and pollutes the environment. This process only requires one alkali soaking operation, and the second steamer 7 is used for mercerization, wherein the concentration of the soaking alkali solution is 230-235g / L, the temperature of steaming mercerization is 96-100℃, preferably, the temperature of steaming mercerization is 98℃; the time is 85-95s, preferably, the time is 90s. By controlling the balance of soaking alkali solution concentration, steaming mercerization time and temperature, the normal mercerization is finally ensured to avoid the strength loss of the fabric. The effects that can be achieved are:

[0034] 1. The finished fabric has a higher dyeing rate (150-30% color depth), the surface is smooth, the color is full, the hand feels fluffy and has an excellent cotton feel, which reduces the mercerizing cost.

[0035] 2. The alkali-binding step is reduced, which makes full use of resources on the one hand, and reduces the mercerization process on the other hand, thereby improving the efficiency of fabric mercerization.

[0036] Then the dyeing process is carried out, and the specific operation is as follows: at room temperature, the semi-finished product is dipped into the dye solution, and the dye solution rate is about 44.5%, and then it is dried by infrared and hot air. Among them, the temperatures of the three wind chambers are: 90℃, 140℃, 170℃→drying with a drying drum→cold water roller→baking (210℃)→cold water roller→dipping in reducing liquid→reducing steaming at a temperature of 100-102℃→1-3 grid cold water washing→oxidizing with hydrogen peroxide at 4 and 5 grids→soap washing (90℃, 6-9 grids)→neutralizing washing (adjusting PH, 10-11 grids)→12-13 grid water washing→drying with a drying drum→cloth dropping.

[0037] Then enter the finishing process, the specific operation is: cloth feeding → rolling finishing working fluid (adding softener MJ-8237: 10g / l) → drying (110-130℃) → photoelectric weft straightening → tenter baking and tentering (135-145℃) → cold water roller → water mist moistening → rubber blanket pre-shrinking finishing → felt blanket → drying with drying drum → cold water roller → cloth dropping

[0038] Example 2

[0039] This embodiment provides a new mercerizing process, and the selected fabric is: T80 / C20 21*21 88*54

[0040] The mercerizing process step includes using a singeing device 1 to singe the fabric. In the singeing process, a four-pass singeing machine is used, the front side is burned twice and the back side is burned once, and the machine speed is 80m / min.

[0041] In the desizing and bleaching machine 2, the scouring and bleaching working solution is immersed for desizing and bleaching. Specifically, the scouring and bleaching working solution includes caustic soda, hydrogen peroxide, refining agent JG130, quick scouring agent and magnesium chloride. The concentration of caustic soda in the scouring and bleaching working solution is 16-18g / L, the concentration of hydrogen peroxide is 12-13g / L, the concentration of refining agent JG130 is 3g / L, the concentration of quick scouring agent KR-9BK is 3g / L, the concentration of quick scouring agent KR-9DW is 7g / L, the concentration of magnesium chloride is 1g / L, and the liquid carrying rate is 84-86%.

[0042] The subsequent steps are: stacking in the first steamer 3, hot water washing, feeding the cloth into the mercerizing machine 5, soaking in alkali solution, steaming and mercerizing in the second steamer 7, hot water washing and drying, and stretching and shaping the cloth.

[0043] Then the dyeing process is carried out, and the specific operation is as follows: at room temperature, the semi-finished product is dipped into the dye solution, and the dye solution rate is about 44.5%, and then it is dried by infrared and hot air. Among them, the temperatures of the three wind chambers are: 90℃, 140℃, 170℃→drying with a drying drum→cold water roller→baking (210℃)→cold water roller→dipping in reducing liquid→reducing steaming at a temperature of 100-102℃→1-3 grid cold water washing→oxidizing with hydrogen peroxide at 4 and 5 grids→soap washing (90℃, 6-9 grids)→neutralizing washing (adjusting PH, 10-11 grids)→12-13 grid water washing→drying with a drying drum→cloth dropping.

[0044] The first steamer 3 is used for stacking, hot water washing, the mercerizing machine 5 is used for feeding the cloth, and the cloth is immersed in alkali solution. The second steamer 7 is used for steaming, mercerizing, hot water washing, drying, stentering and shaping.

[0045] Then enter the finishing process, the specific operation is: cloth feeding → rolling finishing working fluid (adding softener MJ-8237: 10g / l) → drying (110-130℃) → photoelectric weft straightening → tenter baking and tentering (135-145℃) → cold water roller → water mist moistening → rubber blanket pre-shrinking finishing → felt blanket → drying with drying drum → cold water roller → cloth dropping

[0046] The first steamer 3 is used for stacking, hot water washing, the mercerizing machine 5 is used for feeding the cloth, and the cloth is immersed in alkali solution. The second steamer 7 is used for steaming, mercerizing, hot water washing, drying, stentering and shaping.

[0047] Comparative Example 1

[0048] The same as Example 1 is that the fabric used in this comparative example 1 is C60 / T40 20*16 120*60

[0049] The steps of the cloth clip spray mercerizing process are roughly the same as those in Example 1, except that two alkali baths 6 are used, and the alkali solution is first soaked in dilute alkali and then in concentrated alkali, wherein the concentration of dilute alkali is 100g / L and the concentration of concentrated alkali is 210-220g / L. Afterwards, the steamer is not used, and the alkali solution is rinsed by spraying.

[0050] Comparative Example 2

[0051] The same as Example 2 is that the fabric used in this comparative example 2 is T80 / C20 21*21 88*54

[0052] The steps of the cloth clip spray mercerizing process are roughly the same as those in Example 1, except that two alkali baths 6 are used, and the alkali solution is first soaked in dilute alkali and then in concentrated alkali, wherein the concentration of the dilute alkali is 100g / L and the concentration of the concentrated alkali is 210-220g / L. After that, the steamer is not used, and the alkali solution is rinsed by spraying.

[0053] Example 3 Comparison of mercerizing effects

[0054] The fabrics obtained in Example 1 and Example 2 were selected as experimental group 1 and experimental group 2, respectively, and the fabrics obtained by the processes of comparative example 1 and comparative example 2 were respectively selected as control group 1 and control group 2. The selected fabric was 2000 meters, and the color difference comparison was performed by marking ①, ② and ③ at three positions of 500 meters, 1000 meters and 1500 meters respectively.

[0055] Table 1 Comparison of color difference and effect between conventional mercerization and new mercerization

[0056]

[0057] Four aspects, namely, front-to-back color difference, edge-to-center color difference, fabric evaluation, and hand feel evaluation, were selected as evaluation indicators.

[0058] Note: The color difference between the left and right sides of a piece of cloth and the center of the cloth. It is one of the common and difficult problems to overcome in the printing and dyeing process, usually caused by the combined effect of multiple factors.

[0059] Conclusion: The color difference between experimental group 1 and experimental group 2 can be seen, and the finished fabric has a higher dyeing rate (the color depth is 1.5-30%). In addition, the color difference between the left, middle and right fabrics in experimental group 1 and experimental group 2 is smaller. The color difference between the control group 1 and control group 2 is larger.

[0060] Fabric evaluation and feel evaluation method: Four fabrics were randomly mixed and marked with identification marks (unknown to the experimenters), and the experimenters were asked to evaluate the touch of the four fabrics. In the end, the fabrics in experimental group 1 and experimental group 2 were softer and better.

[0061] Example 4

[0062] In the existing cloth clip spray mercerizing equipment, a flushing alkali system is used, and the cloth needs to be spread flat for spraying. However, due to the long length of the cloth, sufficient equipment area is often required, but this process is not conducive to space utilization.

[0063] However, straight-stick mercerizing has the problems of large footprint and high energy consumption. In addition, debris during operation may also cause quality problems such as batch holes in the fabric.

[0064] Based on the new mercerizing process, this embodiment provides a new mercerizing device, such as Figure 1 As shown, it includes a singeing device 1 for singeing the fabric, a descaling and bleaching machine 2 for dipping the fabric in a scouring and bleaching working solution, a first steamer 3, a washing machine 4 for hot water washing, a mercerizing machine 5, an alkali scouring tank 6, a second steamer 7 for steaming and mercerizing, a drying machine 8 and a setting machine 9 for stentering and setting.

[0065] Different from the existing continuous mercerizing equipment, this embodiment only has one alkali-binding tank 6, and the alkali-binding tank 6 is connected to the second steamer 7 so that the fabric is immersed in alkali solution and then enters the steamer for mercerization. The original spray mercerization method is abandoned to save resources.

[0066] As one of the preferred technical solutions, a guide roller assembly is provided in the second steam box 7, and the guide roller assembly is used to perform S-shaped guided circulation steaming on the fabric.

[0067] During mercerizing, the fabric is fed into the guide roller assembly; after S-shaped guidance, the fabric is bent to a certain extent while being tensioned, thereby completing the steaming mercerizing operation on the fabric; at the same time, the overall equipment length is shortened, saving floor space.

[0068] Another thing we know is that after soaking in concentrated alkali solution and then steaming and mercerizing, the finished fabric has a higher dyeing rate (the color depth is 1.5-30%), and the fabric surface is smooth, the color is full, and the hand feel is fluffy and cottony.

[0069] As one of the preferred technical solutions, the guide roller assembly includes a plurality of cloth guide rollers 10, and the plurality of cloth guide rollers 10 are staggeredly distributed on the upper and lower sides of the second steam box 7 to ensure that the fabric is staggeredly wound upward or downward for guided feeding.

[0070] Considering the balance of steaming time and temperature, such as Figure 2 As shown, the guide roller assembly of the second steam box 7 includes four guide parts connected in sequence, and each guide part includes 13-15 cloth guide rollers 10, so as to control the residence time of the cloth in the second steam box 7.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0073] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of mercerizing process, characterized in that: The process includes singeing treatment of fabrics, desizing and bleaching by dipping in scouring and bleaching working solution, stacking in a steamer, hot water washing, feeding of fabrics into a mercerizing machine, dipping in alkali solution and steaming and mercerizing, hot water washing, drying, stentering, shaping and dropping of fabrics.

2. The new mercerizing process according to claim 1 is characterized in that: The concentration of the soaking alkali solution is 230-235g / L.

3. The novel mercerizing process according to claim 1 is characterized in that: The temperature of steam mercerizing is 96-100℃ and the time is 85-95s.

4. The new mercerizing process according to claim 1 is characterized in that: The scouring and bleaching working solution includes caustic soda, hydrogen peroxide, refining agent JG130, quick scouring agent and magnesium chloride.

5. The novel mercerizing process according to claim 4 is characterized in that: The quick training agent includes quick training agent KR-9BK and quick training agent KR-9DW.

6. The novel mercerizing process according to claim 5, characterized in that: The concentration of caustic soda in the scouring and bleaching working solution is 16-18g / L, the concentration of hydrogen peroxide is 12-13g / L, the concentration of refining agent JG130 is 3g / L, the concentration of quick scouring agent KR-9BK is 3g / L, the concentration of quick scouring agent KR-9DW is 7g / L, the concentration of magnesium chloride is 1g / L, and the liquid carrying rate is 84-86%.

7. The new mercerizing process according to claim 1 is characterized in that: In the singeing process, a four-pass singeing machine is used, the front side is burned twice and the back side is burned once, and the machine speed is 80m / min.

8. A novel mercerizing device, applied to the novel mercerizing process according to any one of claims 1 to 7, characterized in that: The method comprises a singeing device for singeing fabrics, a descaling and bleaching machine for dipping the fabrics in a scouring and bleaching working solution, a first steamer, a washing machine for hot water washing, a mercerizing machine, an alkali rolling tank, a second steamer for steam mercerizing, a drying machine and a setting machine for stentering and setting.

9. The new mercerizing device according to claim 8, characterized in that: A guide roller assembly is arranged in the second steam box, and the guide roller assembly is used for performing S-shaped guided circulation steaming on the fabric.

10. The new mercerizing equipment according to claim 8, characterized in that: The guide roller assembly comprises a plurality of cloth guide rollers, which are staggeredly distributed on the upper and lower sides of the second steam box to ensure that the fabric is staggeredly wound upward or downward for guided feeding.

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