CN113403776A - Pretreatment process of recycled high-density nylon fabric - Google Patents
Pretreatment process of recycled high-density nylon fabric Download PDFInfo
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- CN113403776A CN113403776A CN202110659719.6A CN202110659719A CN113403776A CN 113403776 A CN113403776 A CN 113403776A CN 202110659719 A CN202110659719 A CN 202110659719A CN 113403776 A CN113403776 A CN 113403776A
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- 239000004744 fabric Substances 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 67
- 230000008569 process Effects 0.000 title claims abstract description 63
- 229920001778 nylon Polymers 0.000 title claims abstract description 30
- 239000004677 Nylon Substances 0.000 title claims abstract description 28
- 238000005406 washing Methods 0.000 claims abstract description 55
- 238000009990 desizing Methods 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 238000007670 refining Methods 0.000 claims abstract description 23
- 206010042674 Swelling Diseases 0.000 claims abstract description 17
- 230000010355 oscillation Effects 0.000 claims abstract description 17
- 230000008961 swelling Effects 0.000 claims abstract description 17
- 238000010923 batch production Methods 0.000 claims abstract description 14
- 239000003513 alkali Substances 0.000 claims abstract description 12
- 239000002985 plastic film Substances 0.000 claims abstract description 4
- 229920006255 plastic film Polymers 0.000 claims abstract description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 2
- 150000004820 halides Chemical class 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 230000008929 regeneration Effects 0.000 claims description 2
- 238000011069 regeneration method Methods 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 239000000835 fiber Substances 0.000 abstract description 23
- 238000005097 cold rolling Methods 0.000 abstract description 7
- 239000004952 Polyamide Substances 0.000 abstract description 2
- 229920002647 polyamide Polymers 0.000 abstract description 2
- 238000004043 dyeing Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000004513 sizing Methods 0.000 description 9
- 238000004945 emulsification Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 238000004040 coloring Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 230000037303 wrinkles Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 210000000988 bone and bone Anatomy 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000002144 chemical decomposition reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000010070 molecular adhesion Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000006864 oxidative decomposition reaction Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000036314 physical performance Effects 0.000 description 2
- 238000005063 solubilization Methods 0.000 description 2
- 230000007928 solubilization Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000980 acid dye Substances 0.000 description 1
- 238000009874 alkali refining Methods 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000001153 anti-wrinkle effect Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 230000037072 sun protection Effects 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
- D06B3/18—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics combined with squeezing, e.g. in padding machines
-
- 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
- D06B13/00—Treatment of textile materials with liquids, gases or vapours with aid of vibration
-
- 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
- D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
- D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
-
- 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
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/14—De-sizing
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/20—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents combined with mechanical means
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/24—Polyamides; Polyurethanes
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses a pretreatment process for a circularly regenerated high-density polyamide fabric, which comprises a cold pad-batch process and an open width desizing and washing process; the cold pad-batch process adopts a roller to pad the fabric grey cloth, then the padded fabric grey cloth is coiled, a layer of plastic film is sleeved outside the padded fabric grey cloth, the padded fabric grey cloth is tightly bound and sealed, and the rotating cold pad-batch process is carried out; the open-width desizing and washing process comprises a swelling stage, an open-width refining stage and a high-frequency oscillation washing stage; the open-width desizing and washing process comprises the steps of swelling the fabric gray fabric subjected to cold rolling and stacking treatment by using a swelling agent, carrying out open-width refining treatment under the condition of low alkali, and then washing under the condition of high-frequency oscillation. According to the invention, the regenerated nylon fabric is pretreated by matching the processes of cold rolling, swelling, low-alkali desizing treatment and high-efficiency vibration washing according to the characteristics of the fabric, so that the desizing of the regenerated nylon fabric can be ensured to be clean, the internal stress of the fabric is eliminated, the fiber elasticity is fully released, and the fabric surface is smooth.
Description
Technical Field
The invention belongs to the technical field of textile dyeing pretreatment, and particularly relates to a pretreatment process for a recycled high-density nylon fabric.
Background
With the continuous improvement of living standard, people have higher and higher requirements on the functions of the garment fabric, and the garment fabric is required to be comfortable to wear, and has the texture of tender skin and meat and no bone when contacting with skin besides the normal requirement for taking. Therefore, in recent years, textile fabrics have developed trends of light and thin structure, moist style and functional use. In order to resist hot summer, a 'cool skin coat' as thin as cicada wings and light as catkin is also produced. The cool skin clothes adopt regenerated high-density nylon fabric (with the function of ultraviolet resistance and the mass per square meter of single-layer fabric is not more than 42 g/m)2The textile fabric) has even, dense, uneven and wrinkled feeling on the cloth surface, is not easy to be close to the skin when being worn, and is cool and comfortable. Meanwhile, the cool skin clothes have the functions of sun protection, moisture absorption, sweat releasing, moisture permeability, ventilation, softness, thinness, coolness and the like, so that people can enjoy the nature and easily respond to climate change, have a special luster style, are fresh and elegant, are comprehensive functional fabrics integrating various characteristics, and meet the consumption desire and personalized pursuit of modern people.
The ultrathin high-density regenerated nylon fabric is formed by interweaving regenerated 20D/24F nylon filaments and low stretch yarns, and the warp and weft density reaches 400T-450T; the regenerated nylon products are rarely used in the market at present, and the weaving production and dyeing and finishing processing technology of the regenerated superfine denier nylon products is still not mature, so that great production difficulty exists.
Although the regenerated high-density nylon fabric has a plurality of advantages, due to different production methods, the titer, the cross-sectional shape and the molecular structure of the fiber are different, so that the pretreatment, dyeing and after-treatment have certain differences. For the dyeing pretreatment process, the fiber-fiber arrangement density of the ultrathin high-density regenerated nylon fabric is high, the specific surface area of the fiber is large, the monofilament oil quantity is large, and high-concentration medium-viscosity sizing slurry, oil agent, wax and the like with high polymerization degree are required to be used during warping weaving, so that the slurry and the oil agent in a micro-air chamber between high-density fibers are difficult to be drained during desizing, and the subsequent dyeing process is influenced. Therefore, how to improve the pretreatment process of the regenerated high-density nylon fabric plays an important role in the quality of the product.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a pretreatment process for a recyclable high-density nylon fabric. According to the invention, the regenerated nylon fabric is pretreated by matching the processes of cold rolling, swelling, low-alkali desizing treatment and high-efficiency vibration washing according to the characteristics of the fabric, so that the desizing of the regenerated nylon fabric can be ensured to be clean, the internal stress of the fabric is eliminated, the fiber elasticity is fully released, and the fabric surface is smooth.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme: a pretreatment process for a circularly regenerated high-density nylon fabric comprises a cold pad-batch process and an open width desizing and washing process;
the cold pad-batch process adopts a roller to pad the fabric grey cloth, then the padded fabric grey cloth is coiled, a layer of plastic film is sleeved outside the padded fabric grey cloth, the padded fabric grey cloth is tightly bound and sealed, and the rotating cold pad-batch process is carried out;
the open-width desizing and washing process comprises a swelling stage, an open-width refining stage and a high-frequency oscillation washing stage; the open-width desizing and washing process adopts an open-width washing machine to swell the fabric grey cloth subjected to cold pad-batch treatment by using a swelling agent, then carries out open-width refining treatment under the condition of low alkali, and then carries out washing under the condition of high-frequency oscillation.
Further, the cold pad-batch process adopts the following process recipes and process conditions:
further, the process recipe and process conditions adopted in the open width refining stage in the open width desizing and washing process are as follows:
furthermore, swelling agent adopted in the swelling stage of the open-width desizing and washing process is high molecular halide or ethylene carbonate.
Further, the pre-treatment process also comprises a pre-setting process for performing pre-setting treatment on the fabric grey cloth treated by the open width desizing and washing process, wherein the pre-setting process adopts the following process prescription and process conditions:
compared with the prior art, the invention has the following advantages and effects:
the cold pad-batch process of the invention can enable the auxiliary agent to permeate into the fabric, and realize the chemical degradation and emulsification (desizing, deoiling and alkali decrement) of oxidation products in the fabric. Under the designed process conditions, the cold batch treating fluid has stable chemical properties, soft and uniform acting force on fibers and small damage to the fibers, so that the physical indexes of the fibers are in a controllable range, the defect of poor control of the physical performance indexes of the fabrics by traditional high-temperature cloth refining of a machine cylinder can be overcome, the generation of quality difference among batches can be avoided, and the subsequent dyeing reproducibility and the one-time success rate are improved;
the open-width desizing and washing process comprises a swelling stage, an open-width refining stage and a high-frequency oscillation washing stage; the swelling stage adopts the swelling agent to treat the fabric, so that the swelling agent can be utilized to fully swell the fiber, the distance between macromolecular chains of the polyamide fiber is increased, the acting force between the macromolecular chains is reduced, the subsequent refined liquid can enter between high-density fibers and between the macromolecular chains, and the sizing agent, the oiling agent and the like between the fibers and between the macromolecular chains can be better removed; in the open-width refining stage, physical and chemical reactions such as hydrolysis, emulsification, dispersion, solubilization and the like of slurry and the like are accelerated by using a refining liquid so as to perform further low-alkali desizing and cleaning residues generated on the cloth surface by a cold rolling stack process; in the high-efficiency oscillation washing stage, an oscillator is adopted for oscillation washing, and degraded, alkali hydrolyzed and emulsified impurities are washed (cleaned) by oscillation washing to obtain excellent desizing rate and hand feeling.
The open-width desizing and washing process can effectively control further emulsification and oxidative decomposition of the sizing agent and the oil agent, and utilizes dispersion, emulsification, washing and depolymerization caused by the high-frequency oscillation action of the oscillator during high-efficiency washing to reduce the surface tension of dirt adhered to the fiber, reduce the molecular adhesion between impurity particles and the fabric, separate the dirt, the sizing agent and the oil dirt, disperse the dirt in the washing tank, emulsify, disperse and remove the dirt, desize and remove the oil more thoroughly, and the obtained fabric has better wettability, impurity removal rate and whiteness.
The pretreatment process disclosed by the invention has high desizing efficiency, can enable the fabric to naturally shrink in a low-tension state in the whole process, enables the fiber to fully swell and release internal stress, and can thoroughly solve the problems that the fabric has different tension and is easy to wrinkle in the subsequent dyeing process; the fabric fiber treated by the method is fully opened, the dye-uptake rate in the subsequent dyeing process is high, and the fabric has the characteristics of soft, glutinous and fluffy hand feeling, fineness, fullness, good drapability, fluffy feel, softness, no bone feel and the like.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Fabric grey cloth: the recycled and regenerated high-density nylon fabric is formed by interweaving regenerated 20D/24F nylon filaments and low stretch yarns.
The regenerated nylon used by the fabric is derived from waste nylon silk screens, carpets and the like, and is prepared by carrying out regeneration granulation slicing and spinning through depolymerization and repolymerization processes.
The sizing agent on the recycled high-density nylon grey cloth mainly takes chemical sizing agents such as PVA, PVC and the like as main materials; designing a pretreatment process according to the characteristics of higher sizing rate and ultrahigh density of the fabric grey cloth; the pretreatment process comprises a cold pad-batch process and an open width desizing and washing process, and is divided into two steps and three stages: cold rolling, low-alkali refining treatment and high-efficiency oscillation washing;
the cold pad-batch process comprises the steps of padding fabric grey cloth into padding liquid by using a roller, rolling the padded fabric grey cloth, sleeving a layer of plastic film outside the fabric grey cloth, tightly fastening and sealing the fabric grey cloth, and performing rotary cold pad-batch treatment;
the cold rolling process adopts the following process prescription and process conditions:
wherein g/L represents the gram number of the mass of the substance contained in 1L of the cold batch treatment liquid. Specifically, 1L of cold batch treatment liquid is prepared by adding water to a constant volume of 1L, wherein 50g of liquid caustic soda, 1g of deoiling agent TF-126A, 3g of hydrogen peroxide, 1g of penetrating agent, 2g of chelating dispersant and 2g of quick desizing agent.
The cold pad-batch stage is mainly to allow the penetration of the auxiliaries into the fabric and to achieve chemical degradation and emulsification (desizing, degreasing, alkali reduction) of the oxidation products in the fabric. Under the designed process conditions, the cold batch treating fluid has stable chemical properties, soft and uniform acting force on fibers and small damage to the fibers, so that the physical indexes of the fibers are in a controllable range, the defect of poor control of the physical performance indexes of the fabrics by traditional high-temperature cloth refining of a machine cylinder is overcome, the generation of quality difference among batches can be avoided, and the subsequent dyeing reproducibility and the one-time success rate are improved.
The open width desizing and washing process adopts an open width washing machine to carry out open width refining treatment on the fabric gray fabric subjected to cold pad-batch treatment under the condition of low alkali, and then washing is carried out under the condition of oscillation;
the process prescription and process conditions adopted in the open width refining process are as follows:
wherein g/L represents the number of grams of the mass of a substance contained in 1L of a refining liquid. Specifically, the 1L of refining liquid is prepared by using 20g of liquid alkali, 1g of chelating dispersant TF-510C and 0.5g of high-efficiency refining agent TF-188A, and adding water to a constant volume of 1L.
Specifically, the open width water washing machine comprises ten treatment tanks, and the temperature of each tank is shown in table 1.
TABLE 1 open width rinsing machine bath temperature
| Machine trough | Temperature/. degree.C |
| Swell a groove | 60 |
| Refining two-tank | 80 |
| Refining three-groove | 98 |
| Refining three-groove | 98 |
| Five-tank water washing | 95 |
| Washing six-tank | 90 |
| Seven grooves for water washing | 85 |
| Eight water washing tanks | 60 |
| Nine grooves for water washing | 60 |
| Neutralizing tank | 40 |
The open width desizing and washing process is divided into two stages, wherein the open width refining stage is mainly to accelerate physical and chemical reactions such as hydrolysis, emulsification, dispersion, solubilization and the like of slurry and the like by using a refining liquid so as to carry out further desizing and wash residues generated on the cloth surface by a cold rolling process; in the high-efficiency oscillation washing stage, an oscillator is adopted for oscillation washing, and degraded, alkali hydrolyzed and emulsified impurities are washed (cleaned) by oscillation washing to obtain excellent desizing rate and hand feeling.
The open-width desizing and washing process can effectively control further emulsification and oxidative decomposition of the sizing agent and the oil agent, and utilizes dispersion, emulsification, washing and depolymerization caused by the high-frequency oscillation action of the oscillator during high-efficiency washing to reduce the surface tension of dirt adhered to the fiber, reduce the molecular adhesion between impurity particles and the fabric, separate the dirt, the sizing agent and the oil dirt, disperse the dirt in the washing tank, emulsify, disperse and remove the dirt, desize and remove the oil more thoroughly, and the obtained fabric has better wettability, impurity removal rate and whiteness.
In the pretreatment process, the fabric naturally contracts under a low-tension state in the whole process, so that the fiber is fully swelled and internal stress is released, and the problems that the fabric has different tension and is easy to wrinkle in the subsequent dyeing process can be solved more thoroughly; the treated fabric has the characteristics of full fiber opening, high dye-uptake rate, soft and glutinous hand feeling, good drapability, fluffy feel, softness, no bone feel and the like; the pretreatment process has high desizing efficiency, the grooves of the open-width washing machine are connected through the circulating pump, and hot water in the rear groove flows to the front groove to clean the cloth surface, so that a large amount of industrial water can be saved.
The pretreatment process also comprises a pre-setting process; the pre-setting process adopts the following process formula and process conditions:
wherein g/L represents the mass of the substance contained in 1L of the pre-setting treatment liquid. Specifically, 1L of the pre-shaping treatment liquid is prepared by using 20g of anti-yellowing agent RUCOGEN NOX, 2g of pH regulator RUCO-ACID ABS and adding water to a constant volume of 1L.
The recycled regenerated nylon fiber has higher crystallinity, the crystalline regions and the non-crystalline regions are closely arranged, the arrangement of the crystalline regions and the non-crystalline regions can be changed into order by presetting, the tension unevenness generated by the nylon fiber in spinning drafting and weaving processing is reduced or eliminated, and the uniformity of subsequent dyeing can be effectively improved. Meanwhile, the surface flatness and the anti-wrinkle capability of the fabric can be improved through presetting, wrinkle marks and fabric retraction wrinkles generated in dyeing of the fabric are reduced, and the dimensional stability of the fabric in subsequent processing can be improved; in addition, under the high-temperature condition, the elasticity of the fabric can be damaged to a certain extent, and the amino group at the tail end of the fiber is easily oxidized (acid dye coloring group), so that the coloring performance of the nylon is damaged; the pre-setting process can solve the problems by adding the high-temperature anti-yellowing agent and setting the proper pre-setting temperature, and ensures that the elasticity of the fabric and the color absorption performance of subsequent dyeing are not influenced.
Verifying the amount of the residual size of the fabric by adopting a cationic dye coloring method:
the cationic dye coloring method comprises the following specific steps: adopting cationic dye X-2GL red, 0.02% (o.w.f), bath ratio of 1:50, pH value of 4.5, and technological conditions of: washing with water at 50 deg.C for 10min, and oven drying. The color depth of the cloth surface is observed; by observation, the fabric treated by the method has less color on the cloth surface, which indicates that the residual size on the cloth surface is less.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A pretreatment process of a cyclic regeneration high-density nylon fabric is characterized by comprising the following steps: the pretreatment process comprises a cold pad-batch process and an open-width desizing and washing process;
the cold pad-batch process adopts a roller to pad the fabric grey cloth, then the padded fabric grey cloth is coiled, a layer of plastic film is sleeved outside the padded fabric grey cloth, the padded fabric grey cloth is tightly bound and sealed, and the rotating cold pad-batch process is carried out;
the open-width desizing and washing process comprises a swelling stage, an open-width refining stage and a high-frequency oscillation washing stage; the open-width desizing and washing process adopts an open-width washing machine to swell the fabric grey cloth subjected to cold pad-batch treatment by using a swelling agent, then carries out open-width refining treatment under the condition of low alkali, and then carries out washing under the condition of high-frequency oscillation.
2. The pretreatment process of the recycled high-density nylon fabric according to claim 1, characterized in that: the cold pad-batch process adopts the following process formula and process conditions:
3. the pretreatment process of the recycled high-density nylon fabric according to claim 1, characterized in that: the process prescription and process conditions adopted in the open width refining stage in the open width desizing and washing process are as follows:
4. the pretreatment process of the recycled high-density nylon fabric according to claim 1, characterized in that: the swelling agent adopted in the swelling stage of the open-width desizing and washing process is high-molecular halide or ethylene carbonate.
5. The pretreatment process of the recycled high-density nylon fabric according to claim 1, characterized in that: the pre-treatment process also comprises a pre-setting process for pre-setting the fabric grey cloth treated by the open width desizing and washing process, wherein the pre-setting process adopts the following process prescription and process conditions:
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