Super-softening treatment process for comfortable cashmere scarf fabric

Abstract

The invention relates to the technical field of textile finishing, and discloses a comfortable cashmere scarf fabric super-softening treatment process which comprises the following steps: single-bath stepped biochemical cooperative treatment: firstly performing biological enzymolysis treatment under a weak acid or neutral condition in the same working bath, and performing composite infiltration treatment without changing the bath to adjust the pH value to alkalescence; hydrated plastic state control: precisely dehydrating until the residual water content is 25-35%, so that the fabric is in a hydrated plastic state; airflow type kneading and fluffy finishing: repeatedly kneading and casting the fabric by using hot air in a tension-free state to realize fluffy; and energy gradient type fuzzing: performing staged fuzzing treatment by using carbon fiber bristles according to different energy parameters. Through single-bath stepped biochemical co-treatment, hydration plastic state control and energy gradient type fuzzing technologies, the super-soft effect of the cashmere fabric is achieved, the durability is improved, and the wool slip rate and the energy and water consumption are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile finishing, in particular to a comfortable cashmere scarf fabric super-soft treatment process. BACKGROUND

[0002] Cashmere is known as the "soft gold" in the field of textiles, famous for its excellent warmth, lightness and softness, widely used in high-end clothing and home textile products. With the increasing demand for wearing comfort from consumers, the super-soft treatment of cashmere fabric has become a hot research topic in the industry. Super-soft treatment not only can further improve the hand quality of cashmere fabric, but also can improve its drape and wearing comfort, adding higher added value to the product.

[0003] Currently, the soft finishing of cashmere fabric mainly adopts chemical softener treatment, enzyme treatment, mechanical softening and composite softening technology. Chemical softener treatment usually uses cationic softener, silicone oil softener or polyethylene softener, etc., to improve the hand feeling by forming a lubricating film on the fiber surface; enzyme treatment uses protease and other biological enzymes to selectively act on the scale layer on the surface of cashmere fiber, reducing the friction between fibers; mechanical softening mainly includes raising, milling and rubbing, etc. physical methods, which change the physical form of the fiber to improve the softness; composite softening is a combination of the above methods to achieve better treatment effect.

[0004] Although the existing technology has made some progress in the soft finishing of cashmere fabric, there are still some deficiencies: first, the traditional multi-bath treatment process needs multiple up and down baths, which not only increases the mechanical damage to the fiber, but also leads to high energy and water consumption, because the strength of cashmere fiber decreases in wet state, and repeated mechanical action can easily cause fiber breakage and product quality decline; second, conventional soft finishing agents are mostly surface treatments, which are difficult to penetrate into the fiber interior to form a lasting effect, mainly due to the scale structure and hydrophobic properties of the cashmere fiber surface, making it difficult for finishing agents to penetrate into the fiber interior; in addition, the traditional raising process uses single parameter or simple repeated treatment, which cannot be fine-tuned for the special structure of cashmere fiber, especially the steel needle raising, which causes high fiber damage, resulting in high product shedding rate and short service life; finally, the conventional drying and setting process ignores the plasticity of the fiber at a specific moisture content, failing to fully utilize the role of water molecules as a natural plasticizer, resulting in unstable lofting effect and poor durability after treatment. SUMMARY

[0005] The purpose of the present application is to provide a comfortable cashmere scarf fabric super-soft treatment process, which solves the problems of non-durable treatment effect, high fiber damage, high shedding rate and high energy and water consumption in the existing soft finishing process of cashmere fabric.

[0006] To achieve the above object, the present application is implemented by the following technical solutions: A comfortable cashmere shawl fabric super-soft processing process, comprising the following steps: The cashmere fabric is subjected to single-bath stepwise biochemical synergistic treatment, which comprises the following steps in sequence in the same working bath: biological enzymatic hydrolysis treatment under weakly acidic or neutral conditions in the first stage, then adjusting the pH value of the working bath to weakly alkaline without changing the bath to perform the second-stage composite infiltration treatment, to obtain a chemically treated fabric; The chemically treated fabric is subjected to precise dehydration until its residual moisture content reaches 25%-35%, so that the fabric is in a hydrated plastic state; The fabric in the hydrated plastic state is subjected to air-flow type rubbing and fluffy finishing, and the fabric is repeatedly rubbed and projected by hot air in a tension-free state, to obtain a fluffy fabric; The fluffy fabric is subjected to energy gradient type raising using carbon fiber brush hairs.

[0007] Preferably, the single-bath stepwise biochemical synergistic treatment step comprises: The cashmere fabric is placed in an overflow dyeing machine or finishing equipment, and a working bath with a bath ratio of 1:10 to 1:20 is added; 5-10 parts of neutral protease per 1000 parts of fabric based on the dry weight of the fabric is added to the working bath, the pH value of the bath is adjusted to the range of 6.0-7.0 using glacial acetic acid, the temperature is raised to 45-55℃, and the operation is carried out under low tension conditions for 20-30 minutes to complete the first-stage biological enzymatic hydrolysis treatment; Without discharging the working liquid, 75-115 parts of composite infiltration finishing agent per 1000 parts of fabric based on the dry weight of the fabric is added to the same working bath, and sodium carbonate solution is slowly added to raise and stabilize the pH value of the working bath in the range of 7.5-8.5, and the operation is continued at a temperature of 45-55℃ for 15-20 minutes to complete the second-stage composite infiltration treatment; The working liquid is discharged, and the fabric is subjected to one-time short-time rinsing with normal temperature water for 3-5 minutes to obtain a chemically treated fabric.

[0008] In the first stage, the neutral protease gently modifies the scale edges on the surface of the cashmere fiber under weakly acidic or neutral conditions. This biological enzymatic hydrolysis treatment can specifically act on the cutin protein on the scale edges to make them smooth and passive, thereby eliminating the itchy feeling of the cashmere fabric from the source.

[0009] In the second stage, by adjusting the pH value to weak alkaline, on the one hand, the activity of the protease is terminated, preventing excessive enzymatic damage to the fiber; on the other hand, it creates the best adsorption and cross-linking conditions for the composite infiltration finishing agent. This design of process conversion through pH change not only simplifies the processing flow, reduces energy consumption and water consumption, but more importantly, avoids the mechanical damage to the fiber caused by multiple up-and-down baths.

[0010] Preferably, the composite infiltration finishing agent is prepared by the following steps: Add 10-20 parts of deionized water to the reaction kettle with stirring device and stir, control the speed at 100-200 revolutions per minute, slowly add 25-45 parts of high molecular polyether fiber protector under stirring, continue stirring for 10-15 minutes until a uniform solution is formed; Keep stirring and increase the speed to 300-500 revolutions per minute, slowly add 50-70 parts of modified hydrophilic silicone microemulsion by dropwise method within 15-25 minutes; Continue stirring at this speed for 20-30 minutes to ensure that all components are fully mixed to form a stable composite infiltration finishing agent.

[0011] The finishing agent is composed of modified hydrophilic silicone microemulsion, high molecular polyether fiber protector and deionized water in a specific proportion. Among them, the modified hydrophilic silicone microemulsion can penetrate deeply into the interior of the cashmere fiber, providing a soft effect from the inside out; the high molecular polyether fiber protector forms a dynamic protective film on the surface of the fiber, providing lubrication and protection for subsequent physical finishing. The synergistic effect of these two components solves the problem of traditional softeners only acting on the surface and easily forming an oily feeling.

[0012] Preferably, the precision dehydration step includes: Place the chemically treated fabric in a high-efficiency centrifugal dehydrator or vacuum water absorption equipment for dehydration operation; Monitor the moisture content of the fabric in real time, and stop the dehydration process when the residual moisture content reaches 25%-35%; Take out the fabric in a hydrated plastic state to avoid excessive drying in the air, and immediately proceed to the next step.

[0013] When the moisture content of the cashmere fabric is controlled within a specific range of 25%-35%, water molecules act as a natural plasticizer, synergizing with the previously adsorbed high molecular polyether protective agent, to make the fiber reach the best plastic state. In this "hydrated plastic state", the fiber is more easily to achieve stress relaxation and morphological remodeling in subsequent physical finishing, thereby achieving a more ideal soft effect.

[0014] Preferably, the air flow type rubbing and fluffing finishing step includes: The fabric in the hydrated plastic state is immediately sent to the air flow rubbing finishing machine, and the circulating hot air temperature in the cavity is set to 60-80°C, and the air flow speed is 15-35 m / s; In the completely tension-free state of the fabric, the high-speed airflow drives the fabric to repeatedly throw, roll, and rub; The processing time is 20-40 minutes, or until the fabric is completely dry, obtaining a fluffy fabric.

[0015] The air flow rubbing acts on the fibers through the kinetic energy of the airflow rather than direct mechanical force, greatly reducing the risk of damage to the fibers. At the same time, since the fabric is in the aforementioned "hydrated plastic state", the fiber response to air flow rubbing is more sensitive, and a more ideal fluffy effect can be achieved.

[0016] Preferably, in the air flow rubbing fluffy finishing process, the combination of hot air temperature and air flow speed parameters is controlled to achieve precise control of the fabric fluffiness: When a higher fluffiness is needed, the hot air temperature is set to 75-80°C, and the air flow speed is set to 30-35 m / s; When a medium fluffiness is needed, the hot air temperature is set to 65-75°C, and the air flow speed is set to 20-30 m / s; When a lower fluffiness is needed, the hot air temperature is set to 60-65°C, and the air flow speed is set to 15-20 m / s.

[0017] Preferably, the energy gradient raising step includes the following three consecutive stages: The first stage is a high-speed straightening stage, the fluffy fabric is sent to a high-precision raising machine equipped with a carbon fiber brush roller, the roller speed is set to 400-600 rpm, the fabric running speed is 15-25 m / min, and the raising force is set to the lowest gear, so that the carbon brush gently contacts the fabric surface, disperses and straightens the fiber bundles; The second stage is a medium-speed pulling-out stage, the roller speed is reduced to 250-350 rpm, the fabric running speed is adjusted to 12-20 m / min, and the raising force is increased to the medium gear, gently pulling out the fiber tips from the yarn to form a preliminary pile; The third stage is a low-speed finishing stage, further reducing the roller speed to 100-200 rpm, the fabric running speed is adjusted to 10-18 m / min, and the raising force is maintained or slightly adjusted to the medium-high gear to comb and finish the formed pile.

[0018] In the first stage, the parameters of high rotating speed and shallow penetration are used to disperse and straighten the fiber bundle instead of raising the fiber; the second stage starts to gently pull the fiber tips out of the yarn; the third stage is to card and trim the formed pile. This segmented energy control realizes the fine processing of cashmere fiber, which not only obtains the ideal pile effect, but also maximally protects the integrity of the fiber.

[0019] Preferably, the carbon fiber brush hair has a diameter of 0.05-0.15 mm, a density of 3000-5000 hairs / cm2, and a length of 3-8 mm, so as to ensure the gentle processing of cashmere fiber and the fine raising effect.

[0020] Preferably, the energy gradient raising step further comprises a finished product setting step. The raised fabric is sent to a low-tension tentering setting machine, and the fabric is given moisture by a steam injection device, the steam pressure is controlled at 0.1-0.2 MPa, and the fiber is relaxed; The fabric in a wet and relaxed state is sent to an oven, the oven temperature is set to 80-100 DEG C, the fabric running speed is 15-30 m / min, and the overfeed rate is controlled between 5-15%; The fabric is stretched to a preset width by the needle chain system of the tentering device, and the longitudinal tension of the fabric is maintained at 20-50 N by a tension control system, and after heat setting, the fabric is cooled to 30-40 DEG C by a cooling device and then discharged.

[0021] In summary, the present application has at least one of the following beneficial technical effects: 1. The cashmere fabric super-soft processing technology of the present application realizes two functionally different processes of biological enzyme and complex infiltration by precise pH control in the same working bath through single-bath stepwise biochemical synergistic treatment technology, which not only avoids the repeated mechanical damage to the fiber in the traditional two-bath method, but also realizes the all-round softening treatment from the inside to the outside, so that the treated cashmere fabric has an unprecedented smooth and soft feel, and the energy consumption and water consumption are significantly reduced, and the production efficiency is improved.

[0022] 2. The present application controls the water content of the fabric within a certain range, so that the water molecules act as a natural plasticizer and synergize with the adsorbed high molecular polyether, and on this basis, the airflow rubbing and loosening finishing is carried out, so that the cashmere fiber realizes three-dimensional expansion and rearrangement in a tension-free state, forming a durable and stable fluffy structure, breaking the process limitations of traditional "drying first and then finishing" or "wet cloth direct high-temperature drying", and significantly improving the thickness and fluffiness of the fabric.

[0023] 3.The present application realizes the fine processing of cashmere fibers by decomposing the raising process into three functionally different continuous stages of "straightening", "pulling out" and "finishing", matching different energy parameters for each stage, and combining carbon fiber brush hairs with thin diameter and high density, thereby obtaining excellent pile feeling while maximizing the integrity of the fibers, significantly reducing the lint rate of the processed fabric, and greatly prolonging the service life of the product.

[0024] 4.The composite infiltration finishing agent of the present application forms a three-dimensional finishing effect of internal penetration to surface protection through the synergistic effect of modified hydrophilic silicone microemulsion and high molecular polyether fiber protective agent, ensures the uniformity and stability of the finishing effect through the preparation process of step-by-step addition and speed-controlled stirring, and effectively locks the soft and fluffy effect imparted by the foregoing process through the "relaxation first and then fixation" finished product setting process, so that the processed cashmere fabric not only has excellent initial performance, but also shows excellent washing resistance and dimensional stability, meeting the quality requirements of high-end cashmere products. DETAILED DESCRIPTION

[0025] The present application will be further described below.

[0026] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0027] Example 1: The present application provides a comfortable cashmere scarf fabric super-soft processing technology, comprising the following steps: S1, preparation of a composite infiltration finishing agent In a stainless steel reaction kettle with stirring device, 15 parts of deionized water were added, and stirring was started with a speed control of 150 revolutions per minute. Under stirring, 35 parts of high molecular polyether fiber protective agent (polyoxyethylene polyoxypropylene ether, solid content 25%) were slowly added, and stirring was continued for 12 minutes until a uniform transparent solution was formed. Then, the stirring speed was increased to 400 revolutions per minute, and 60 parts of modified hydrophilic silicone microemulsion (amino-modified polysiloxane, solid content 30%) were slowly added by dropwise addition within 20 minutes. After the addition was completed, stirring was continued at this speed for 25 minutes to ensure that the components were fully mixed and a stable composite infiltration finishing agent was formed.

[0028] S2, single-bath step-by-step biochemical synergistic treatment 100% cashmere knitted scarf fabric (surface density 200g / m 2) and the working bath is added to the overflow dyeing machine with a bath ratio of 1:15. A neutral protease (enzyme activity 25000 U / g) is added to the working bath at a dosage of 7.5 parts per 1000 parts of fabric by dry weight of the fabric, and the bath pH is adjusted to 6.5 using glacial acetic acid, and the temperature is raised to 50°C, and the first stage of biological enzymatic treatment is completed under low tension conditions for 25 minutes.

[0029] Without discharging the working bath, the composite impregnation agent prepared above is added to the same working bath at a dosage of 95 parts per 1000 parts of fabric by dry weight of the fabric, and 2% sodium carbonate solution is slowly added to raise and stabilize the pH of the working bath at 8.0, and the temperature is maintained at 50°C, and the second stage of composite impregnation treatment is continued for 18 minutes. After the treatment is completed, the working bath is discharged, and the chemically treated fabric is rinsed once for a short time in normal temperature water for 4 minutes to obtain the chemically treated fabric.

[0030] S3, precise dehydration to hydrated plastic state: The chemically treated fabric is placed in a high-efficiency centrifugal dehydrator and dehydrated at a speed of 800 revolutions per minute. The water content of the fabric is monitored in real time by an infrared moisture meter, and the dehydration process is stopped when the residual water content reaches 30%, and the fabric in a hydrated plastic state is taken out to avoid excessive drying in the air, and the next step is immediately performed.

[0031] S4, air flow rubbing and fluffing finishing: The fabric in a hydrated plastic state is immediately sent to an air flow rubbing finishing machine, and the circulating hot air temperature in the cavity is set to 70°C, and the air flow speed is 25 meters per second. In the complete tension-free state of the fabric, the high-speed air flow drives the fabric to repeatedly shoot, roll and rub, and the treatment time is 30 minutes to obtain the fluffed fabric.

[0032] S5, energy gradient raising: The fluffed fabric is sent to a high-precision raising machine equipped with a carbon fiber brush roller, the carbon fiber brush has a wire diameter of 0.1 mm, a brush density of 4000 roots per square centimeter, and a brush length of 5 mm.

[0033] The first stage is a high-speed straightening stage, the roller speed is set to 500 revolutions per minute, the fabric running speed is 20 meters per minute, and the raising force is set to the lowest gear to make the carbon brush gently contact the fabric surface to disperse and straighten the fiber bundles.

[0034] The second stage is a medium-speed pulling-out stage, the roller speed is reduced to 300 revolutions per minute, the fabric running speed is adjusted to 16 meters per minute, and the raising force is increased to the medium gear to gently pull out the fiber tips from the yarn to form the initial pile.

[0035] The third stage is a low-speed trimming stage, further reducing the roller speed to 150 rpm, the fabric running speed is adjusted to 14 m / min, and the raising force is maintained at a medium-high level. The formed pile is combed and trimmed.

[0036] S6, product shaping: The raised fabric is sent to a low-tension tentering setting machine, the fabric is humidified by a steam injection device, the steam pressure is controlled at 0.15 MPa to relax the fibers. Then the fabric in a wet and relaxed state is sent to an oven, the oven temperature is set to 90℃, the fabric running speed is 22 m / min, and the overfeed rate is controlled at 10%. The needle chain system of the tentering device grabs the edges of the fabric on both sides, stretches the fabric horizontally to the preset width, and uses the tension control system to keep the longitudinal tension of the fabric at 35 N. After heat setting, the fabric temperature is reduced to 35℃ by the cooling device.

[0037] Example 2: The present application provides a comfortable cashmere scarf fabric super soft treatment process, comprising the following steps: S1, preparation of composite infiltration finishing agent: In a stainless steel reaction kettle with stirring device, 20 parts of deionized water are added, stirring is started, and the stirring speed is controlled at 100 rpm. Under stirring, 25 parts of high molecular polyether fiber protective agent (polyoxyethylene polyoxypropylene ether, solid content 20%) are slowly added, and stirring is continued for 10 minutes until a uniform transparent solution is formed. Then, the stirring speed is increased to 300 rpm, and 50 parts of modified hydrophilic silicone microemulsion (amino-modified polysiloxane, solid content 25%) are slowly added by dropwise addition within 25 minutes. After the addition is completed, continue to stir at this speed for 20 minutes to ensure that the components are fully mixed to form a stable composite infiltration finishing agent.

[0038] S2, single-bath stepwise biochemical synergistic treatment: 100% cashmere knitted scarf fabric (face density 150 g / m 2 ) is placed in an overflow dyeing machine, and a working bath with a bath ratio of 1:20 is added. Add 5 parts of neutral protease (enzyme activity 20000 U / g) per 1000 parts of fabric based on the dry weight of the fabric to the working bath, adjust the bath pH to 6.0 with glacial acetic acid, heat to 45℃, and run under low tension for 20 minutes to complete the first stage of biological enzyme treatment.

[0039] Without discharging the working liquid, the composite impregnation finishing agent prepared above is added to the same working bath, the amount of which is 75 parts per 1000 parts of fabric based on the dry weight of the fabric, and a 1% sodium carbonate solution is slowly added to raise and stabilize the pH value of the working bath at 7.5, and the operation is continued at a temperature of 45°C for 15 minutes to complete the second-stage composite impregnation treatment. After the treatment is completed, the working liquid is discharged, and a short rinse is performed once with normal temperature water for 3 minutes to obtain the chemically treated fabric.

[0040] S3, precision dehydration to hydrated plastic state: The chemically treated fabric is placed in a vacuum water absorption device for dehydration operation, and the vacuum degree is set to -0.05 MPa. The water content of the fabric is monitored in real time by an infrared moisture meter, and when the residual water content reaches 25%, the dehydration process is stopped, and the fabric in the hydrated plastic state is taken out to avoid excessive drying in the air, and the next step is immediately performed.

[0041] S4, air flow rubbing and loosening finishing: The fabric in the hydrated plastic state is immediately sent to an air flow rubbing finishing machine, and the circulating hot air temperature in the cavity is set to 60°C, and the air flow speed is 15 meters / second. In the completely tension-free state of the fabric, the high-speed air flow drives the fabric to repeatedly shoot, tumble, and rub, and the treatment time is 20 minutes to obtain the loosened fabric.

[0042] S5, energy gradient raising: The loosened fabric is sent to a high-precision raising machine equipped with a carbon fiber brush roll, and the carbon fiber brush has a wire diameter of 0.05 mm, a brush density of 3000 roots / cm2, and a brush length of 3 mm.

[0043] The first stage is a high-speed straightening stage, the roller speed is set to 400 rpm, the fabric running speed is 15 m / min, and the raising force is set to the lowest gear to make the carbon brush gently contact the fabric surface to disperse and straighten the fiber bundles.

[0044] The second stage is a medium-speed pulling-out stage, the roller speed is reduced to 250 rpm, the fabric running speed is adjusted to 12 m / min, and the raising force is increased to the medium gear to gently pull out the fiber tips from the yarn to form the initial pile.

[0045] The third stage is a low-speed finishing stage, the roller speed is further reduced to 100 rpm, the fabric running speed is adjusted to 10 m / min, and the raising force is maintained at the medium-high gear to comb and finish the formed pile.

[0046] S6, product setting: The raised fabric is sent to a low-tension tentering setting machine, the fabric is given moisture by a steam injection device, the steam pressure is controlled at 0.1 MPa to relax the fibers. Then the wet and relaxed fabric is sent to an oven, the oven temperature is set at 80℃, the fabric running speed is 15 m / min, and the overfeed rate is controlled at 5%. The fabric edges are grabbed by the needle chain system of the tentering device, the fabric is stretched horizontally to the preset width, and the longitudinal tension of the fabric is maintained at 20 N by the tension control system. After the heat setting is completed, the fabric temperature is reduced to 30℃ by the cooling device, and the fabric is discharged.

[0047] Example 3: The present application provides a comfortable cashmere scarf fabric super-soft processing technology, comprising the following steps: S1, preparation of a composite infiltration finishing agent: In a stainless steel reaction kettle with stirring device, 10 parts of deionized water is added, and the stirring is started with a speed of 200 rpm. Under stirring, 45 parts of high molecular polyether fiber protective agent (polyoxyethylene polyoxypropylene ether, solid content 30%) is slowly added, and stirring is continued for 15 minutes until a uniform transparent solution is formed. Then, the stirring speed is increased to 500 rpm, and 70 parts of modified hydrophilic silicone microemulsion (amino-modified polysiloxane, solid content 35%) is slowly added by dropwise addition within 15 minutes. After the addition is completed, the stirring is continued at this speed for 30 minutes to ensure that the components are fully mixed to form a stable composite infiltration finishing agent.

[0048] S2, single-bath stepwise biochemical synergistic treatment: 100% cashmere knitted scarf fabric (face density 250 g / m 2 ) is placed in an overflow dyeing machine, and a working bath with a bath ratio of 1:10 is added. 10 parts of neutral protease (enzyme activity 30000 U / g) per 1000 parts of fabric based on the dry weight of the fabric is added to the working bath, the bath pH value is adjusted to 7.0 using glacial acetic acid, and the temperature is raised to 55℃. The working bath is run at low tension for 30 minutes to complete the first stage of biological enzyme treatment.

[0049] Without discharging the working liquid, the composite infiltration finishing agent prepared above is added to the same working bath at a dosage of 115 parts per 1000 parts of fabric based on the dry weight of the fabric, and 3% sodium carbonate solution is slowly added to raise and stabilize the pH value of the working bath at 8.5. The working bath is continued to run at 55℃ for 20 minutes to complete the second stage of composite infiltration treatment. After the treatment is completed, the working liquid is discharged, and the chemically treated fabric is rinsed with cold water for a short time of 5 minutes.

[0050] S3, precise dehydration to hydrated plastic state: The chemically treated fabric is placed in a high-efficiency centrifugal dewatering machine for dewatering operation, with the rotational speed set at 1000 rpm. The water content of the fabric is monitored in real time by an infrared moisture meter, and the dewatering process is stopped when the residual water content reaches 35%, and the fabric in a hydrated plastic state is taken out to avoid excessive drying in the air, and the next step is immediately performed.

[0051] S4, air flow rubbing and loosening finishing: The fabric in a hydrated plastic state is immediately sent to an air flow rubbing finishing machine, with the circulating hot air temperature in the cavity set at 80°C and the air flow speed at 35 m / s. In a completely tension-free state of the fabric, the high-speed air flow drives the fabric to repeatedly shoot, tumble, and rub, and the treatment time is 40 minutes to obtain a loosened fabric.

[0052] S5, energy gradient raising: The loosened fabric is sent to a high-precision raising machine equipped with a carbon fiber brush roller, with the carbon fiber brush having a wire diameter of 0.15 mm, a brush density of 5000 / cm2, and a brush length of 8 mm.

[0053] The first stage is a high-speed straightening stage, with the roller rotational speed set at 600 rpm, the fabric running speed set at 25 m / min, and the raising force set at the lowest gear to make the carbon brush gently contact the fabric surface to disperse and straighten the fiber bundles.

[0054] The second stage is a medium-speed pulling-out stage, with the roller rotational speed reduced to 350 rpm, the fabric running speed adjusted to 20 m / min, and the raising force increased to the medium gear to gently pull out the fiber tips from the yarn to form preliminary pile.

[0055] The third stage is a low-speed finishing stage, with the roller rotational speed further reduced to 200 rpm, the fabric running speed adjusted to 18 m / min, and the raising force maintained at the medium-high gear to comb and finish the formed pile.

[0056] S6, finished product setting: The raised fabric is sent to a low-tension tenter setting machine, which is humidified by a steam injection device, with the steam pressure controlled at 0.2 MPa to relax the fibers. Then the fabric in a humid and relaxed state is sent to an oven, with the oven temperature set at 100°C, the fabric running speed set at 30 m / min, and the overfeed rate controlled at 15%. The fabric edges are grabbed by the needle chain system of the tenter device to stretch the fabric horizontally to the preset width, while the longitudinal tension of the fabric is maintained at 50 N by the tension control system. After the heat setting is completed, the fabric temperature is reduced to 40°C by the cooling device before the fabric is discharged.

[0057] Comparative Example 1: Compared with Example 1, the difference is that the pH adjustment step in the single-bath stepwise bio-chemical synergistic treatment is omitted, and a traditional two-bath method is used instead. Specifically, the bio-enzymatic treatment is first carried out at a pH of 6.5 for 25 minutes, the working solution is then discharged, and the working solution is then re-prepared and subjected to a composite impregnation treatment at a pH of 8.0 for 18 minutes alone, and the rest is the same.

[0058] Comparative Example 2: Compared with Example 1, the difference is that the composition of the composite impregnation finishing agent is changed, only 75 parts of modified hydrophilic silicone microemulsion (amino-modified polysiloxane, solid content 30%) is used, and no high-molecular polyether fiber protective agent is added, and the rest is the same.

[0059] Comparative Example 3: Compared with Example 1, the difference is that the step of precise dehydration to a hydrated plastic state is omitted, and the chemically treated fabric is directly subjected to conventional centrifugal dehydration to a completely dry state (residual moisture content <5%), and then subjected to air-flow rubbing and fluffing finishing, and the rest is the same.

[0060] Comparative Example 4: Compared with Example 1, the difference is that in the air-flow rubbing and fluffing finishing step, the hot air temperature is increased to 110°C, the air flow speed is reduced to 10 meters / second, and the treatment time is shortened to 15 minutes, and the rest is the same.

[0061] Comparative Example 5: Compared with Example 1, the difference is that the energy gradient raising step is replaced by a traditional single-parameter raising process, i.e. only one fixed parameter (drum speed 300 rpm, fabric running speed 15 m / min, raising force set to medium level) is used for raising treatment, instead of three stages, and the rest is the same.

[0062] Comparative Example 6: Compared with Example 1, the difference is that the preparation method of the composite impregnation finishing agent is changed, i.e. all components are added at once, i.e. 15 parts of deionized water, 35 parts of high-molecular polyether fiber protective agent and 60 parts of modified hydrophilic silicone microemulsion are added at the same time in the stirring device, and stirring is carried out directly at 400 rpm for 45 minutes, and the rest is the same.

[0063] Comparative Example 7: Compared with Example 1, the difference is that a traditional steel needle brush is used instead of a carbon fiber brush for raising treatment, the steel needle diameter is 0.3 mm, and the density is 1000 roots / cm2, and the rest is the same.

[0064] Comparative Example 8: Compared with Example 1, the difference is that in the finished product setting step, the steam conditioning treatment is omitted, and the dry fabric after raising is directly sent to the oven for heat setting, and the rest is the same.

[0065] Test Example 1: Experimental material preparation Prepare 9 groups of samples according to the process of Example 1 and Comparative Examples 1-8, each group of sample size is 30cm x 30cm; Pre-treat all samples under standard atmospheric conditions (temperature 20±2℃, relative humidity 65±3%) for 24 hours; Number each group of samples, and use blind test method for subsequent testing; Use ring stiffness method for testing: Cut 6 test samples from each group of samples, 3 in the warp direction and 3 in the weft direction, each with a size of 2.5cm x 15cm; Place the test sample on the ring stiffness tester so that one end of the test sample is aligned with the horizontal plane; Slowly move the test sample until the front end of the test sample contacts the 45° angle scale line under its own gravity; Record the distance L from the starting position to the contact point; Calculate the bending stiffness G (unit: mg·cm) according to the formula G=W x L 3 , where W is the mass per unit area of the test sample; calculate the average bending stiffness in the warp and weft directions respectively, and take the geometric mean as the bending stiffness of the sample.

[0066] Loft test steps: Randomly select 5 test points from each group of samples; Use YG141D thickness gauge, pressure area is 20cm 2 , pressure is 1kPa; Place the sample flat on the test platform and slowly lower the pressure plate; After the reading is stable, record the thickness value (accurate to 0.01mm); Calculate the average value of the 5 test points as the thickness (loft) index of the sample.

[0067] Pilling rate test steps: Cut 4 circular test samples with a diameter of 38mm from each group of samples Fix the test sample on the sample holder of the Martindale abrasion tester; Use standard friction cloth to rub at a pressure of 9kPa; Set the number of rubs to 500; After rubbing is complete, use a precision electronic balance (accuracy 0.0001g) to weigh the mass difference before and after rubbing of the test sample; Calculate the pilling rate = (mass before rubbing - mass after rubbing) / mass before rubbing x 100%; Take the average value of the 4 test samples as the pilling rate of the sample.

[0068] Data processing method: The average value and standard deviation were calculated for the test data of each group of samples; The significance of the effect of different processes on physical properties was evaluated by one-way analysis of variance (ANOVA); SPSS 25.0 statistical software was used for data analysis, and the significance level was set as P<0.05; According to the importance of each index, the comprehensive performance score was calculated according to the weight of softness 40%, bulkiness 30%, and lint rate 30%.

[0069] After the above tests, the average values were compared, and the test results are shown in Tables 1, 2, 3, and 4.

[0070] Table 1: Physical property test results of cashmere scarf fabric treated by different processes Table 2: Original data of bending stiffness test in warp and weft directions Table 3: Original data of test points for thickness test Sample No. Point 1 Point 2 Point 3 Point 4 Point 5 Example 1 1.89 1.85 1.92 1.83 1.86 Comparative Example 1 1.65 1.61 1.67 1.59 1.63 Comparative Example 2 1.57 1.62 1.56 1.60 1.58 Comparative Example 3 1.19 1.24 1.18 1.25 1.20 Comparative Example 4 1.75 1.69 1.78 1.67 1.71 Comparative Example 5 1.71 1.65 1.69 1.66 1.70 Comparative Example 6 1.76 1.72 1.77 1.70 1.75 Comparative Example 7 1.78 1.73 1.79 1.74 1.76 Comparative Example 8 1.67 1.63 1.68 1.62 1.65 Table 4: Original data of 4 samples for lint rate test Sample No. Test Sample 1 Test Sample 2 Test Sample 3 Test Sample 4 Example 1 0.21 0.24 0.22 0.25 Comparative Example 1 0.29 0.32 0.30 0.33 Comparative Example 2 0.45 0.49 0.46 0.48 Comparative Example 3 0.27 0.31 0.28 0.30 Comparative Example 4 0.36 0.41 0.37 0.38 Comparative Example 5 0.50 0.54 0.51 0.53 Comparative Example 6 0.31 0.35 0.32 0.34 Comparative Example 7 0.87 0.92 0.88 0.89 Comparative Example 8 0.33 0.37 0.34 0.36 From Tables 1-4, it can be seen that: Example 1 showed excellent performance in bending stiffness, thickness, and lint rate, with the highest comprehensive score. Based on the mechanism of single-bath stepwise biochemical synergy, in the processing, the neutral protease first performs mild modification on the edge of the scale on the surface of the cashmere fiber under weakly acidic or neutral conditions, making it smooth and passivated. Then, by adjusting the pH value to weakly alkaline, a complex infiltration treatment is performed in the same working bath. The modified hydrophilic silicone microemulsion can penetrate deeply into the fiber, while the high molecular polyether fiber protective agent forms a dynamic protective film on the surface. This synergistic effect from the inside out makes the softness of Comparative Example 1 (two-bath process) and Comparative Example 2 (lack of high molecular polyether fiber protective agent) significantly lower than that of Example 1, with an increase in bending stiffness of 36.5% and 85.1%, respectively.

[0071] When the moisture content of cashmere fabric is controlled within a specific range of 25%-35%, water molecules act as a natural plasticizer, synergistically with the high-molecular polyether protective agent adsorbed in the early stage, allowing the fiber to reach the optimal plastic state. In this state, airflow rubbing and fluffing finishing are carried out, and the fiber is more likely to achieve three-dimensional stretching and relaxation in a tension-free state. The test results show that the thickness value of comparative example 3 (omitting the control of the hydrated plastic state) is only 1.21mm, which is 35.3% lower than the 1.87mm of Example 1, proving the decisive role of the hydrated plastic state in improving the fluffiness of the fabric. At the same time, although the thickness value of comparative example 4 (improper airflow parameters) reaches 1.72mm, its unevenness and slight burning phenomenon indicate that the scientific setting of airflow parameters is equally important to ensure the fluffiness effect and fiber protection.

[0072] By decomposing the raising process into three continuous stages with different functions, namely "straightening", "pulling out" and "trimming", and matching different energy parameters for each stage, the cashmere fiber is finely processed. The test results show that the hair loss rate of comparative example 5 (single parameter raising) is 0.52%, which is 126% higher than the 0.23% of Example 1; and the hair loss rate of comparative example 7 (using steel needle brushes) is as high as 0.89%, which is 3.87 times that of Example 1. The synergistic advantage of energy gradient raising technology and carbon fiber bristle application was verified, that is, while obtaining a good velvet feel, the integrity of the fiber is protected to the maximum extent. In addition, the decline in the comprehensive performance of comparative example 8 (omitting the steam moistening treatment) also shows that the "relaxation first and then fixation" process in the shaping of the finished product plays an important role in locking the soft and fluffy effect imparted by the aforementioned process.

[0073] Test Example 2: Experimental description: Experimental material preparation: Cashmere scarves prepared in Example 1 and Comparative Examples 1, 2, 5, 7, and 8 were used for durability testing (size: 30 cm × 30 cm); All samples were pretreated under standard atmospheric conditions (temperature 20 ± 2 °C, relative humidity 65 ± 3%) for 24 h; Durability test steps: Cut 4 specimens of 30cm×30cm in size from each group of samples; Mark a 10 cm × 10 cm measurement area on the specimen for subsequent dimensional change determination; Use a standard household washing machine set to the wool cycle; Washing conditions: water temperature 30±2℃, detergent concentration 0.5% (neutral wool detergent), washing time 10 minutes; Rinse twice, 5 minutes each time, and then dry naturally in a flat state; The washing-drying process was repeated 5 times. The following indexes of the samples were measured before and after washing: Softness (according to the loop stiffness method in Test Example 1); Thickness (according to the thickness measurement method in Test Example 1); Dimensional change rate (percentage change of the marked area was measured); The retention rate of each index was calculated = index value after washing / index value before washing x 100% Data processing method; The average value and standard deviation were calculated for the test data of each group of samples; The significance of changes in each index before and after washing was analyzed using paired t-test; SPSS 25.0 statistical software was used for data analysis, and the significance level was set as P<0.05; According to the importance of each index, the comprehensive retention rate was calculated according to the weight of softness retention rate 40%, thickness retention rate 40%, and dimensional stability 20%. The test results are shown in Tables 5-7.

[0074] Table 5: Retention rate of each performance index after 5 washes Sample No. Softness Retention Thickness Retention Dimensional Stability Overall Retention Example 1 93.7 95.2 98.3 95.4 Comparative Example 1 87.3 91.8 97.5 90.8 Comparative Example 2 76.5 89.4 96.8 84.2 Comparative Example 5 88.9 90.7 97.2 91.3 Comparative Example 7 85.2 88.3 96.9 88.5 Comparative Example 8 81.7 85.6 92.4 85.3 Table 6: Original data of softness change before and after washing Sample No. Before Washing After 1 Wash After 2 Washes After 3 Washes After 4 Washes After 5 Washes Example 1 42.37 42.89 43.25 43.82 44.31 45.21 Comparative Example 1 57.82 59.37 61.28 63.15 64.92 66.23 Comparative Example 2 78.43 83.27 88.15 93.42 98.76 102.52 Comparative Example 5 49.76 50.83 51.97 53.24 54.63 55.97 Comparative Example 7 51.28 52.87 54.63 56.38 58.24 60.19 Comparative Example 8 55.17 57.83 60.42 63.18 65.73 67.53 Table 7: Original data of thickness change before and after washing From Tables 5-7, it can be seen that: Example 1 still maintained excellent performance stability after 5 standard washes, with softness retention rate, thickness retention rate, and dimensional stability reaching 93.7%, 95.2%, and 98.3%, respectively, and the comprehensive retention rate reaching as high as 95.4%. This outstanding durability is mainly due to the special composition of the composite impregnation finishing agent and its unique mechanism of action. The high molecular polyether fiber protective agent forms a stable composite system with the modified hydrophilic silicone microemulsion, the former can penetrate into the fiber to form an elastic support structure, and the latter forms a flexible protective film on the fiber surface. The softness retention rate of Comparative Example 2 (lacking high molecular polyether fiber protective agent) was only 76.5%, which was 17.2 percentage points lower than that of Example 1, fully demonstrating the key role of the synergistic effect of the two components in improving the durability of the treatment effect.

[0075] The combination of the hydration plastic state control technology and the air flow rubbing and lofting finish allows the cashmere fibers to achieve three-dimensional and stereoscopic expansion and rearrangement at the optimal plastic state. This structural reorganization at the molecular level, rather than simple surface treatment, is the fundamental reason for the excellent thickness retention rate of Example 1. The test data show that the thickness retention rate of Example 1 reaches 95.2%, which is significantly higher than 90.7% of Comparative Example 5 (single parameter raising) and 88.3% of Comparative Example 7 (using steel needle brushing). This indicates that the lofted structure formed by hydration plastic state control and air flow rubbing and lofting finish has higher stability and can maintain the three-dimensional structure of the fibers without easy collapse during repeated washing processes.

[0076] The "relaxation before fixation" process in the final shaping of the product is a key link to ensure dimensional stability. Example 1 uses steam wetting to fully relax the fibers, and then performs heat setting under the condition of precisely controlled tension and temperature, effectively locking the soft and fluffy effect imparted by the previous process. Test results show that the dimensional stability of Example 1 reaches 98.3%, while Comparative Example 8 (omitting steam wetting treatment) is only 92.4%. This difference is more pronounced as the number of washes increases, as can be seen from Table 11, the dimensional change of Example 1 after the 5th wash is only 1.7%, while that of Comparative Example 8 is 7.6%. This fully demonstrates that the overall technical system formed by single-bath stepwise biochemical synergistic treatment, hydration plastic state control, air flow rubbing and lofting finish, and energy gradient raising, not only can achieve the super-soft effect of cashmere fabric, but also can ensure that this effect has excellent durability and stability.

[0077] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A super-soft processing process for comfortable cashmere scarf fabric, characterized in that: The following steps are involved: The cashmere fabric is subjected to a single-bath stepwise biochemical synergistic treatment, which includes, in the same working bath, a first stage of bio-enzymatic hydrolysis under weakly acidic or neutral conditions, followed by a second stage of composite impregnation treatment by adjusting the pH value of the working bath to weakly alkaline without changing the bath, to obtain a chemically treated fabric; Precision dehydrating the chemically treated fabric until its residual moisture content reaches 25%-35%, so that the fabric is in a hydrated plastic state; The fabric in the hydrated plastic state is subjected to airflow rubbing and fluffing finishing, and the fabric is repeatedly rubbed and projected with hot air in a tension-free state to obtain a fluffy fabric; The fluffed fabric is subjected to energy gradient raising using carbon fiber bristles.

2. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 1, characterized in that: The single-bath stepwise biochemical co-processing step comprises: Place the cashmere fabric in an overflow dyeing machine or finishing equipment and add a working bath with a bath ratio of 1:10 to 1:20; Add 5-10 parts of neutral protease per 1000 parts of fabric dry weight to the working bath, adjust the pH value of the bath to 6.0-7.0 with glacial acetic acid, raise the temperature to 45-55°C, and run under low tension conditions for 20-30 minutes to complete the first stage of bio-enzymatic hydrolysis treatment; Without draining the working liquid, add a composite impregnation finishing agent to the same working bath at a rate of 75-115 parts per 1000 parts of fabric dry weight. At the same time, slowly add sodium carbonate solution to raise the pH value of the working bath and stabilize it in the range of 7.5-8.

5. Continue running at a temperature of 45-55°C for 15-20 minutes to complete the second stage of composite impregnation treatment. Drain the working solution and rinse briefly with clean water at room temperature for 3-5 minutes to obtain the chemically treated fabric.

3. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 2, characterized in that: The composite sizing finishing agent is prepared by the following steps: Add 10-20 parts of deionized water to a reactor equipped with a stirring device and stir at a speed of 100-200 rpm. Slowly add 25-45 parts of a high molecular weight polyether fiber protective agent while stirring. Continue stirring for 10-15 minutes until a uniform solution is formed. Keep stirring and increase the speed to 300-500 rpm, slowly add 50-70 parts of modified hydrophilic silicone microemulsion by dropwise addition over 15-25 minutes; Continue stirring at this speed for 20-30 minutes to ensure that all components are fully mixed to form a stable composite sizing finishing agent.

4. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 3, characterized in that: The precision dehydration step comprises: Place the chemically treated fabric in a high-efficiency centrifugal dehydrator or vacuum water suction equipment for dehydration; Monitor the moisture content of the fabric in real time and stop the dehydration process when the residual moisture content reaches the range of 25%-35%; Take out the fabric in the hydrated plastic state, avoid it from over-drying in the air, and proceed to the next step immediately.

5. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 4, characterized in that: The airflow-type rubbing and fluffing finishing step comprises: The fabric in the hydrated plastic state is immediately sent to the airflow rubbing finishing machine, and the circulating hot air temperature in the cavity is set to 60-80℃ and the air flow speed is 15-35 m / s; When the fabric is completely tension-free, high-speed airflow is used to drive the fabric to be repeatedly thrown, rolled, and rubbed; The processing time is 20-40 minutes, or until the fabric is completely dry and a fluffy fabric is obtained.

6. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 5, characterized in that: During the airflow rubbing and fluffing process, the fabric bulkiness can be precisely controlled by controlling the combined parameters of hot air temperature and airflow velocity: When higher bulk is required, set the hot air temperature to 75-80°C and the air flow speed to 30-35 m / s; When medium bulk is required, set the hot air temperature to 65-75°C and the air flow speed to 20-30 m / s; When lower bulk is required, set the hot air temperature at 60-65°C and the air flow speed at 15-20 m / s.

7. The super-softening treatment process for comfortable cashmere scarf fabric according to claim 6, characterized in that: The energy gradient raising step includes the following three consecutive stages: The first stage is the high-speed straightening stage, in which the fluffed fabric is fed into a high-precision raising machine equipped with a carbon fiber brush roller. The roller speed is set at 400-600 rpm, the fabric running speed is 15-25 m / min, and the raising force is set to the lowest gear, so that the carbon brush gently contacts the fabric surface, breaking up and straightening the fiber bundles. The second stage is the medium-speed pulling-out stage, where the drum speed is reduced to 250-350 rpm, the fabric running speed is adjusted to 12-20 m / min, and the raising force is increased to a medium level to gently pull the fiber ends out of the yarn to form preliminary fluff; The third stage is the low-speed trimming stage, in which the drum speed is further reduced to 100-200 rpm, the fabric running speed is adjusted to 10-18 m / min, the raising force is maintained or fine-tuned to a medium to high level, and the formed fluff is combed and trimmed.

8. The process for super-softening comfortable cashmere scarf fabric according to claim 7, characterized in that: The carbon fiber bristles have a wire diameter of 0.05-0.15 mm, a bristle density of 3000-5000 pieces per square centimeter, and a bristle length of 3-8 mm, so as to ensure gentle treatment of the cashmere fibers and a fine raising effect.

9. The process for super-softening comfortable cashmere scarf fabric according to claim 8, characterized in that: The energy gradient raising step also includes a finished product shaping step: The raised fabric is fed into a low-tension stenter setting machine and moistened by a steam jet device with the steam pressure controlled at 0.1-0.2 MPa to relax the fibers. Feed the wet and relaxed fabric into the oven, set the oven temperature to 80-100°C, the fabric running speed to 15-30 m / min, and the overfeed rate to be controlled between 5-15%; The pin-tooth chain system of the tentering device grabs the edges of the fabric on both sides and stretches the fabric horizontally to the preset width. At the same time, the tension control system is used to maintain the longitudinal tension of the fabric between 20-50 Newtons. After heat setting is completed in this state, the fabric temperature is reduced to 30-40℃ by the cooling device before it is discharged.

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