CN113605021B - Method for preventing denim from generating plaiting folds - Google Patents

Method for preventing denim from generating plaiting folds Download PDF

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Publication number
CN113605021B
CN113605021B CN202110949527.9A CN202110949527A CN113605021B CN 113605021 B CN113605021 B CN 113605021B CN 202110949527 A CN202110949527 A CN 202110949527A CN 113605021 B CN113605021 B CN 113605021B
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denim
jean
preventing
temperature
desizing
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CN113605021A (en
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王宗文
李剑坤
梁汉锋
张钰波
柯文博
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Advance Denim Co ltd
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Advance Denim Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B21/00—Successive treatments of textile materials by liquids, gases or vapours
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/20—Arrangements of apparatus for treating processing-liquids, -gases or -vapours, e.g. purification, filtration or distillation
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B5/00—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C17/00—Fulling
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
    • D06M13/46—Compounds containing quaternary nitrogen atoms
    • D06M13/463—Compounds containing quaternary nitrogen atoms derived from monoamines
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/53—Polyethers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • D06M2200/50—Modified hand or grip properties; Softening compositions

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

The invention discloses a method for preventing denim from generating plaiting folds, which comprises the following steps: filtering the wastewater; spraying the jean fabric with waste water; carrying out high-temperature steam treatment on the jean fabric, controlling the pressure value to be 3-6 atmospheres, and releasing pressure; and (5) preshrinking the jean fabric. The method for preventing the jean from generating the plaiting folds is additionally arranged between the desizing process and the preshrinking process, and the jean fabric is softened by utilizing the wastewater generated by desizing the jean fabric or the wastewater generated by washing the jean clothing, so that the problem of plaiting folds generated during processing the jean fabric is effectively solved; and the waste water is fully utilized, so that the resources are effectively utilized, and the production cost is saved.

Description

Method for preventing denim from generating plaiting folds
Technical Field
The invention relates to the technical field of fabric after-finishing, in particular to a method for preventing denim from generating plaiting folds.
Background
Starting from the production of daily clothing fabric, denim presents a number of technical problems to be solved urgently to technicians. In addition to the widespread use of machines, new problems arise due to the limitations of the machines while reducing the costs of the workers. The denim is mainly stacked and stored in a layered stacking mode in the preshrinking treatment process of entering the after-finishing process, and folds, short for 'plaiting folds', can appear on the lower-middle-layer selvedge under the action of gravity along with the increase of the stacking weight of the denim. Wherein, the process of mainly generating the plaiting fold is a preshrinking treatment process. The occurrence of the crease can cause the problems of increased shrinkage, water washing mark and the like of the cloth in the existing after-finishing process due to the conditions of improper operation, limited machine and the like. The winding drum is used for winding the cloth, so that the occurrence probability of 'plaiting fold' is reduced, but the wound cloth needs to be unreeled again before entering the after-finishing process to enter the after-finishing process, and sampling investigation is inconvenient for sampling staff to sample the sample cloth, so that the time and the machine cost are increased, the production efficiency is greatly reduced, and the actual production requirement is not met.
The manufactured jeans wear is required to be treated by a washing process, so that the jeans wear has a variegated antique style of jeans. The common jeans wear needs to be treated by a washing process, and a bleaching process such as ferment bleaching, chlorine bleaching and the like is carried out, so that a unique jeans style is realized. Caustic soda treatment is adopted in the washing water treatment process, the sizing agent of the fabric is removed, and in addition, desizing enzyme treatment is also adopted for the jean fabric, so that the fabric is convenient for subsequent processing. The wastewater generated by desizing treatment is generally directly discharged to a sewage treatment plant for inactivation treatment, and cannot be recycled.
In the prior art, a technical scheme for solving the problem of plaiting by utilizing waste water generated in the process of desizing of jean fabric or washing jean clothing is not available. Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a method for preventing denim from generating a plaiting fold, which aims to solve the problem of generating a plaiting fold in the existing denim production process.
The technical scheme of the invention is as follows:
a method for preventing jean from developing a plaiting fold, comprising the steps of:
(1) Filtering the wastewater;
(2) Spraying the jean fabric with waste water;
(3) Carrying out high-temperature steam treatment on the jean fabric, controlling the pressure value to be 3-6 atmospheres, and releasing pressure;
(4) Preshrinking the jean fabric;
(5) And (5) drying the jean fabric.
According to the method for preventing the denim from generating the plaiting, the ceramic membrane with the aperture of 30-300 nm is adopted for filtering in the filtering step.
The method for preventing the denim from generating the plaiting folds comprises the step of spraying for 30-100s;
the waste water is waste water after desizing the jean fabric or waste water after washing water treatment of jean clothes.
According to the method for preventing the denim from being folded, the waste water is a mixed solution of the waste water after desizing the denim fabric and the waste water after washing the denim garment, and the mixed weight ratio of the waste water after desizing the denim fabric to the waste water after washing the denim garment is 1:2.
In the method for preventing the denim from generating the plaiting, the high-temperature steam treatment time is 1-2min and the temperature is 130-180 ℃ in the high-temperature steam treatment process.
In the method for preventing denim from generating plaiting, a fiber softening degradation agent is slowly added into water for generating steam in the high-temperature steam treatment process, wherein the addition amount is 1-2% of the whole solution system volume.
The method for preventing denim from generating plaiting, wherein the fiber softening degradation agent comprises the following raw materials in percentage by weight:
20-30% of isooctyl alcohol polyoxyethylene ether phosphate, 30-45% of dodecyl dimethyl hydroxypropyl phosphate betaine, 2-4% of auxiliary agent and the balance of water.
The method for preventing denim from generating plaiting, wherein the preparation process of the fiber softening degradation agent comprises the following steps:
mixing an auxiliary agent with water to obtain a mixed liquid; adding isooctyl alcohol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing, and stirring at the speed of 80-300r/min for 6-12min at the temperature of 40-50 ℃.
The method for preventing jean from generating plaiting folds comprises the steps of pre-shrinking the jean by adopting a pre-shrinking machine in the pre-shrinking treatment process, wherein the speed of the pre-shrinking machine is 15-25m/min, the compression degree of a rubber blanket is 17-19%, the temperature of the rubber blanket is 120-140 ℃, and the temperature of a blanket drying cylinder is 120-140 ℃.
The method for preventing the denim from generating the plaiting is arranged between the desizing process and the shaping process or between the shaping process and the preshrinking process.
The beneficial effects are that: the method for preventing the jean from generating the plaiting folds is additionally arranged between the desizing process and the preshrinking process, and the jean fabric is softened by utilizing the wastewater generated by desizing the jean fabric or the wastewater generated by washing the jean clothing, so that the problem of plaiting folds generated during processing the jean fabric is effectively solved; and the waste water generated after desizing treatment of the jean fabric or washing treatment of jean clothes is fully utilized, so that resources are effectively utilized, and the production cost is saved.
Detailed Description
The invention provides a method for preventing jean from generating plaiting, which is further described in detail below for the purpose, technical scheme and effect of the invention to be clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
According to the method for preventing the denim from being folded, disclosed by the invention, the denim fabric is softened by utilizing the waste water generated by desizing the denim fabric or the waste water generated by washing the denim fabric, and combining other steps, so that the problem of folding the denim fabric during processing can be effectively solved and prevented, the waste water is fully utilized, resources are effectively utilized, and the production cost is saved.
The traditional post-finishing process of inelastic denim generally comprises 3 procedures of singeing, desizing and shaping in sequence. The traditional post-finishing process of the elastic denim generally comprises 4 working procedures of singeing, desizing, shaping and preshrinking in sequence.
In order to solve and prevent the problem of plaiting, the method for preventing the denim from generating plaiting is additionally arranged between the two working procedures of desizing and preshrinking, namely, the method for preventing the denim from generating plaiting can be arranged between the desizing working procedure and the shaping working procedure or between the shaping working procedure and the preshrinking working procedure.
Specifically, the method for preventing denim from generating a plaiting fold comprises the following steps:
(1) Filtering the wastewater to remove impurities in the wastewater.
The waste water can be waste water after desizing the jean fabric or waste water after washing water treatment of jean clothes.
The filtering step is to filter by adopting a ceramic membrane with the aperture of 30-300 nm, and mainly remove impurities such as scraps, fiber hairiness and the like.
(2) And (3) spraying the jean fabric with the wastewater for 30-100s.
In the spraying process, the waste water is preferably a mixed solution of the waste water after desizing the jean fabric and the waste water after washing the jean clothing, and the mixed weight ratio of the waste water after desizing the jean fabric and the waste water after washing the jean clothing is preferably 1:2.
The waste water after desizing the jean fabric generally contains desizing enzyme, and the waste water after washing the jean clothing generally contains sodium hypochlorite and sodium hydroxide. Because the jean fabric is subjected to desizing treatment, part of the sizing agent can be removed from the sizing agent on the fabric after the sizing agent is subjected to desizing enzyme treatment, so that the fabric can be conveniently processed in the subsequent working procedure. The method has the advantages that the mixing ratio of 1:2 is adopted, desizing enzyme in the wastewater is utilized to further remove sizing agents on the fabric, and meanwhile, jean clothing wastewater with a higher ratio is adopted, so that the fabric can be further desized and oxidized, and the fibers are acted, so that the fibers are changed to different degrees, and softening is realized.
The desizing enzyme, sodium hydroxide and sodium hypochlorite contained in the mixed liquid can remove the sizing agent on the surface of the yarn, can also act on the fibers in the yarn to remove the impurities such as wax and pectin in the fibers, and can act on the fibers to a certain extent under the action of the sodium hypochlorite to damage the structures of the fibers so that the fibers are softened to a certain extent.
(3) And (3) performing high-temperature steam treatment on the jean fabric, controlling the pressure value at 3-6 atmospheres, and releasing pressure after the treatment time is 1-2 min.
When the high-temperature steam treatment is carried out, the temperature is generally 130-180 ℃, the steam treatment is used, so that the fibers are further fully soaked, the fibers absorb water and swell uniformly, the inner fibers are mutually transferred and held tightly under the action of lubrication and the pressure of the surface layer and the middle layer fibers, and the stress of the fibers is reduced, so that the inner layer of the yarn is more compact. Through pressure release treatment, release pressure, the fibrous structure of fibre in the surface fabric changes under the circumstances of pressure release in the twinkling of an eye, and its crystallization area reduces to the fibre further softens, and coefficient of friction is little between the fibre in the surface fabric simultaneously, takes place to slide easily between the fibre. Through the treatment step, the outer layer fiber of the fabric yarn is softened, and the inner layer fiber of the yarn is tightly held, so that the fabric yarn is soft and rigid, and the problem of plaiting folding is better solved and prevented. The internal fiber cohesion is tight, so that the stress among the fibers is reduced, and the external soft yarn can slow down the impact of the stress on the yarn under the action of external force, so that the yarn is protected from being damaged, the treated fabric has certain bending rigidity, and the problem of plaiting is more effectively solved.
More preferably, in the high-temperature steam treatment process, a fiber softening degradation agent is introduced, and the addition amount is 1-2% of the volume of the whole solution system. The fiber softening degradation agent is slowly added into the water for generating steam through a metering pump, and is uniformly mixed through stirring, and then the high-temperature steam treatment is carried out on the fabric.
More preferably, the fiber softening degradation agent comprises isooctyl alcohol polyoxyethylene ether phosphate, dodecyl dimethyl hydroxypropyl phosphate betaine, an auxiliary agent and water.
The phosphate betaine surfactant is an amphoteric surfactant, and has the characteristics of excellent wettability, emulsifying dispersibility, antistatic property, low surface tension, excellent foaming performance and the like. The isooctyl alcohol polyoxyethylene ether phosphate is a novel anionic surfactant and has the characteristics of nonionic and anionic surfactants. Therefore, the water-based emulsion has excellent wetting, penetrating, emulsifying, dispersing and heat-resistant alkali-resistant properties, and has good compatibility with the amphoteric surfactant. The dodecyl dimethyl hydroxypropyl phosphate betaine surfactant and the isooctyl alcohol polyoxyethylene ether phosphate are matched for use, and the synergistic effect generated by the dodecyl dimethyl hydroxypropyl phosphate betaine surfactant and the isooctyl alcohol polyoxyethylene ether phosphate can ensure that the surface activity performance, the emulsifying dispersion performance and the alkali resistance of the compound system are better.
The probability of occurrence due to the synergistic effect increases with the increase of the intermolecular interaction force of the two surfactants. The interaction force between the betaine ampholytic type and the nonionic type is relatively weak, and a small amount of cationic surfactant can be added to enhance the interaction force in the compound system so as to achieve a better compound effect. Therefore, the auxiliary agent can be selected from quaternary ammonium salt type cationic surfactants such as cetyl trimethyl ammonium bromide surfactant. It is soluble in both acidic and alkaline solutions, has good compatibility with other types of surfactants, and can be used as softener for synthetic fibers and natural fibers.
Further, the fiber softening degradation agent comprises the following raw materials in percentage by weight:
20-30% of isooctyl alcohol polyoxyethylene ether phosphate, 30-45% of dodecyl dimethyl hydroxypropyl phosphate betaine, 2-4% of auxiliary agent and the balance of water.
The preparation process of the fiber softening degradation agent can be as follows: 1. firstly, mixing an auxiliary agent with clear water, and slowly stirring to obtain a mixed liquid; 2. adding isooctyl alcohol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing the components according to a proportion, and stirring at a speed of 80-300r/min for 6-12min at a temperature of 40-50 ℃ to obtain the fiber softening degradation agent.
The fiber softening degradation agent is obtained by adding the substances, can act on the fibers to destroy the molecular structure of the fibers, so that part of molecular bonds in the fibers are broken, and meanwhile, the crystallinity of the fibers is reduced, thereby realizing further softening of the fibers, improving the bending resistance of the fibers to a certain extent, reducing the friction coefficient between the fibers, facilitating sliding under smaller acting force, eliminating the stress of the fibers, and facilitating the softening treatment of the fibers in the processing process of the subsequent preshrinking procedure. Moreover, the fiber softening degradation agent can be uniformly sprayed into the jean fabric through steam.
(4) And (5) preshrinking the jean fabric.
The preshrinking treatment process can be carried out by adopting a preshrinking machine, the speed of the preshrinking machine is 15-25m/min, the compression degree of the rubber blanket is 17-19%, the temperature of the rubber blanket is 120-140 ℃, and the temperature of the blanket drying cylinder is 120-140 ℃. According to the preshrinking treatment method, when the fabric is subjected to heating preshrinking treatment, the fibers are combined with the fibers to easily slide under the action of compression, so that the middle layer and the outer layer of the fibers in the yarn are easily transferred, the fibers are held and tightly held under the action of external force, and meanwhile, the fiber structure is changed and softened, so that the fabric can be subjected to better shrinkage treatment, the treated fabric is stable in size and has certain bending rigidity, and the problem of plaiting folding is solved more effectively.
The invention is further illustrated by the following examples.
Example 1 (double wastewater with cellulose degradation agent)
The denim is treated by the following steps: singeing, desizing, shaping, treating for preventing denim from generating plaiting and preshrinking. Specifically, the process parameters of each process are as follows.
Singeing: the conditions for the front singeing treatment are as follows: the flame temperature is 700 ℃, and the speed of the singeing machine is 70m/min.
Desizing: desizing the fabric, and adding desizing enzyme and penetrating agent into a desizing tank to mix the desizing enzyme and the penetrating agent into a solution, wherein the concentration of the desizing enzyme is 12g/L, and the concentration of the penetrating agent is 5g/L; the speed of the desizing machine is 70m/min; the temperature of the enzyme padding slurry tank is 65 ℃, the temperature of the water washing tank is 50 ℃, the temperature of the drying cylinder is 110 ℃, the pressure of the padder is 0.3Mpa, and the humidity of the cropping equipment is 5%.
Shaping: the setting treatment temperature is 170 ℃, the vehicle speed is 30m/min, and the drying temperature is 120 ℃.
The treatment process for preventing denim from generating plaiting folds comprises the following steps:
(1) Filtering the wastewater after desizing the jean fabric and the wastewater after washing the jean garment by adopting a ceramic membrane with the aperture of 200 nm;
(2) Mixing the waste water after desizing the jean fabric and the waste water after washing the jean garment according to the weight ratio of 1:2, and then spraying the jean fabric by using the waste water for 60s;
(3) Preparation of a fiber softening degradation agent: the fiber softening degradation agent comprises the following raw materials in percentage by weight:
25% of isooctyl alcohol polyoxyethylene ether phosphate, 38% of dodecyl dimethyl hydroxypropyl phosphate betaine, 3% of cetyl trimethyl ammonium bromide and the balance of water;
firstly, mixing cetyl trimethyl ammonium bromide with clear water, slowly stirring to obtain a mixed liquid, adding isooctyl alcohol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing the components according to a proportion, and stirring at a speed of 200r/min for 8min at 45 ℃ to obtain a fiber softening degradation agent;
slowly adding a fiber softening degradation agent into water for generating steam by a metering pump, wherein the addition amount is 1.5% of the volume of the whole solution system, uniformly mixing the fiber softening degradation agent by stirring, performing high-temperature steam treatment on the jean fabric, controlling the pressure value at 5 atmospheres, controlling the temperature between 150 ℃ and the treatment time at 1.5min, and releasing pressure;
(4) Preshrinking the jean fabric: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 130 ℃.
Preshrinking: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 120 ℃.
Example 2 (double wastewater, no cellulose degradation agent)
The denim is treated by the following steps: singeing, desizing, shaping, treating for preventing denim from generating plaiting and preshrinking. Specifically, the process parameters of each process are as follows.
Singeing: the conditions for the front singeing treatment are as follows: the flame temperature is 700 ℃, and the speed of the singeing machine is 70m/min.
Desizing: desizing the fabric, and adding desizing enzyme and penetrating agent into a desizing tank to mix the desizing enzyme and the penetrating agent into a solution, wherein the concentration of the desizing enzyme is 12g/L, and the concentration of the penetrating agent is 5g/L; the speed of the desizing machine is 70m/min; the temperature of the enzyme padding slurry tank is 65 ℃, the temperature of the washing tank is 50 ℃, the temperature of the drying cylinder is 110 ℃, the pressure of the padder is 0.3Mpa, and the humidity of the cropping equipment is 5%.
Shaping: the setting treatment temperature is 170 ℃, the vehicle speed is 30m/min, and the drying temperature is 120 ℃.
The treatment process for preventing denim from generating plaiting folds comprises the following steps:
(1) Filtering the wastewater after desizing the jean fabric and the wastewater after washing the jean garment by adopting a ceramic membrane with the aperture of 200 nm;
(2) Mixing the waste water after desizing the jean fabric and the waste water after washing the jean garment according to the weight ratio of 1:2, and then spraying the jean fabric by using the waste water for 60s;
(3) Carrying out high-temperature steam treatment on the jean fabric, controlling the pressure value at 5 atmospheres, controlling the temperature between 150 ℃, and releasing pressure after the treatment time is 1.5 min;
(4) Preshrinking the jean fabric: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 130 ℃.
Preshrinking: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 120 ℃.
Example 3 (Single wastewater with cellulose degradation agent)
The denim is treated by the following steps: singeing, desizing, shaping, treating for preventing denim from generating plaiting and preshrinking. Specifically, the process parameters of each process are as follows.
Singeing: the conditions for the front singeing treatment are as follows: the flame temperature is 700 ℃, and the speed of the singeing machine is 70m/min.
Desizing: desizing the fabric, and adding desizing enzyme and penetrating agent into a desizing tank to mix the desizing enzyme and the penetrating agent into a solution, wherein the concentration of the desizing enzyme is 12g/L, and the concentration of the penetrating agent is 5g/L; the speed of the desizing machine is 70m/min; the temperature of the enzyme padding slurry tank is 65 ℃, the temperature of the washing tank is 50 ℃, the temperature of the drying cylinder is 110 ℃, the pressure of the padder is 0.3Mpa, and the humidity of the cropping equipment is 5%.
Shaping: the setting treatment temperature is 170 ℃, the vehicle speed is 30m/min, and the drying temperature is 120 ℃.
The treatment process for preventing denim from generating plaiting folds comprises the following steps:
(1) Filtering the wastewater subjected to desizing treatment of the jean fabric by adopting a ceramic membrane with the aperture of 200 nm;
(2) Mixing the waste water after desizing the jean fabric according to the weight ratio of 1:2, and then spraying the jean fabric by using the waste water for 60s;
(3) Preparation of a fiber softening degradation agent: the fiber softening degradation agent comprises the following raw materials in percentage by weight:
25% of isooctyl alcohol polyoxyethylene ether phosphate, 38% of dodecyl dimethyl hydroxypropyl phosphate betaine, 3% of cetyl trimethyl ammonium bromide and the balance of water;
firstly, mixing cetyl trimethyl ammonium bromide with clear water, slowly stirring to obtain a mixed liquid, adding isooctyl alcohol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing the components according to a proportion, and stirring at a speed of 200r/min for 8min at 45 ℃ to obtain a fiber softening degradation agent;
slowly adding a fiber softening degradation agent into water for generating steam by a metering pump, wherein the addition amount is 1.5% of the volume of the whole solution system, uniformly mixing the fiber softening degradation agent by stirring, performing high-temperature steam treatment on the jean fabric, controlling the pressure value at 5 atmospheres, controlling the temperature between 150 ℃ and the treatment time at 1.5min, and releasing pressure;
(4) Preshrinking the jean fabric: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 130 ℃.
Preshrinking: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 120 ℃.
Example 4 (Single wastewater with cellulose degradation agent)
The denim is treated by the following steps: singeing, desizing, shaping, treating for preventing denim from generating plaiting and preshrinking. Specifically, the process parameters of each process are as follows.
Singeing: the conditions for the front singeing treatment are as follows: the flame temperature is 700 ℃, and the speed of the singeing machine is 70m/min.
Desizing: desizing the fabric, and adding desizing enzyme and penetrating agent into a desizing tank to mix the desizing enzyme and the penetrating agent into a solution, wherein the concentration of the desizing enzyme is 12g/L, and the concentration of the penetrating agent is 5g/L; the speed of the desizing machine is 70m/min; the temperature of the enzyme padding slurry tank is 65 ℃, the temperature of the water washing tank is 50 ℃, the temperature of the drying cylinder is 110 ℃, the pressure of the padder is 0.3Mpa, and the humidity of the cropping equipment is 5%.
Shaping: the setting treatment temperature is 170 ℃, the vehicle speed is 30m/min, and the drying temperature is 120 ℃.
The treatment process for preventing denim from generating plaiting folds comprises the following steps:
(1) Filtering the waste water of the jeans wear after washing water treatment by adopting a ceramic membrane with the aperture of 200 nm;
(2) Carrying out spray treatment on the jean fabric by using the waste water after washing water treatment on jean clothes, wherein the spray treatment time is 60s;
(3) Preparation of a fiber softening degradation agent: the fiber softening degradation agent comprises the following raw materials in percentage by weight:
25% of isooctyl alcohol polyoxyethylene ether phosphate, 38% of dodecyl dimethyl hydroxypropyl phosphate betaine, 3% of cetyl trimethyl ammonium bromide and the balance of water;
firstly, mixing an auxiliary agent with clear water, slowly stirring to obtain a mixed liquid, adding isooctanol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing the components according to a proportion, and stirring at a speed of 200r/min at 45 ℃ for 8min to obtain a fiber softening degradation agent;
slowly adding a fiber softening degradation agent into water for generating steam by a metering pump, wherein the addition amount is 1.5% of the volume of the whole solution system, uniformly mixing the fiber softening degradation agent by stirring, performing high-temperature steam treatment on the jean fabric, controlling the pressure value at 5 atmospheres, controlling the temperature between 150 ℃ and the treatment time at 1.5min, and releasing pressure;
(4) Preshrinking the jean fabric: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 130 ℃.
Preshrinking: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 120 ℃.
Comparative example
The denim is treated by the following steps: singeing, desizing, shaping and preshrinking. Specifically, the process parameters of each process are as follows.
Singeing: the conditions for the front singeing treatment are as follows: the flame temperature is 700 ℃, and the speed of the singeing machine is 70m/min.
Desizing: desizing the fabric, and adding desizing enzyme and penetrating agent into a desizing tank to mix the desizing enzyme and the penetrating agent into a solution, wherein the concentration of the desizing enzyme is 12g/L, and the concentration of the penetrating agent is 5g/L; the speed of the desizing machine is 70m/min; the temperature of the enzyme padding slurry tank is 65 ℃, the temperature of the washing tank is 50 ℃, the temperature of the drying cylinder is 110 ℃, the pressure of the padder is 0.3Mpa, and the humidity of the cropping equipment is 5%.
Shaping: the setting treatment temperature is 170 ℃, the vehicle speed is 30m/min, and the drying temperature is 120 ℃. Preshrinking: the pre-shrinking machine is adopted for pre-shrinking treatment, the speed of the vehicle is 20m/min, the compression degree of the rubber blanket is 18%, the temperature of the rubber blanket is 130 ℃, and the temperature of the blanket drying cylinder is 120 ℃.
The same jean fabric was used in examples 1 to 4 and comparative examples, and performance tests were performed on the jean fabrics prepared in examples 1 to 4 and comparative examples, and the test results are shown in table 1 below.
The fabric was evaluated for crease recovery according to the test criteria of the national standard (GB/T3819-1997 method for determining recovery angle of crease recovery of textile fabrics). The results are shown in Table 1. As can be seen from the data in table 1, the jean fabric is better in resistance or recovery ability after being subjected to bending deformation into a crease state by the treatment for preventing the jean from generating a plaiting fold.
TABLE 1
In addition to preventing plaiting, the softness of the jean fabric treated by the post-finishing process of the method is improved. And (3) testing the softness performance of the fabric: the fabric was tested for drape according to the test standard of the national standard (GB/T23329-2009, method B), the smaller the drape coefficient, the better the softness. The results are shown in Table 2.
TABLE 2
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.

Claims (5)

1. A method for preventing denim from being folded, characterized in that the method for preventing denim from being folded is arranged between a desizing process and a sizing process or between a sizing process and a preshrinking process, the method for preventing denim from being folded comprising the following steps:
(1) Filtering the wastewater; the waste water is a mixed solution of waste water after desizing the jean fabric and waste water after washing water treatment of jean clothing, and the mixed weight ratio of the waste water after desizing the jean fabric and the waste water after washing water treatment of jean clothing is 1:2;
(2) Spraying the jean fabric with waste water;
(3) Carrying out high-temperature steam treatment on the jean fabric, controlling the pressure value to be 3-6 atmospheres, and releasing pressure; in the high-temperature steam treatment process, the high-temperature steam treatment time is 1-2min, and the temperature is 130-180 ℃; slowly adding a fiber softening degradation agent into water for generating steam, wherein the addition amount is 1-2% of the whole solution system volume; the fiber softening degradation agent comprises the following raw materials in percentage by weight: 20-30% of isooctyl alcohol polyoxyethylene ether phosphate, 30-45% of dodecyl dimethyl hydroxypropyl phosphate betaine, 2-4% of auxiliary agent and the balance of water; the auxiliary agent is cetyl trimethyl ammonium bromide;
(4) And (5) preshrinking the jean fabric.
2. The method for preventing denim from being folded according to claim 1, wherein the filtering step is performed by using a ceramic membrane with a pore size of 30-300 nm.
3. Method for preventing denim folds according to claim 1, characterized in that the time of the spraying treatment is 30-100s.
4. The method for preventing denim from producing a plaiting fold according to claim 1, wherein the fiber softening degradation agent is prepared by:
mixing an auxiliary agent with water to obtain a mixed liquid; adding isooctyl alcohol polyoxyethylene ether phosphate and dodecyl dimethyl hydroxypropyl phosphate betaine into the mixed liquid, uniformly mixing, and stirring at the speed of 80-300r/min for 6-12min at the temperature of 40-50 ℃.
5. The method for preventing denim from being folded according to claim 1, wherein the preshrinking process is carried out by a preshrinking machine, the speed of the preshrinking process is 15-25m/min, the compression degree of the rubber blanket is 17-19%, the temperature of the rubber blanket is 120-140 ℃, and the temperature of a blanket drying cylinder is 120-140 ℃.
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CN104695203A (en) * 2015-03-23 2015-06-10 苏州陈恒织造有限公司 Anti-wrinkle treatment process of wool and linen yarns
CN108866727A (en) * 2018-06-19 2018-11-23 刘振波 A kind of production technology through to high-elastic low-shrinkage water cartographic bi-bomb denim
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