A method for manufacturing a cashmere blended fabric

Abstract

The present application relates to cashmere blended fiber fabric technical field, especially to a kind of preparation method of cashmere blended fiber fabric, the cashmere blended fiber fabric is composed of the following weight parts of raw materials: cashmere fiber 50-60 parts, polybutylene adipate elastomeric fiber 3-5 parts, bacterial cellulose nanofiber 5-8 parts, PNIPAM graft modification polyester 17-22 parts, polydopamine coated basalt staple fiber 6-10 parts, bamboo pulp fiber 8-12 parts, crosslinking agent 0.8-1.5 parts.In the process of making cashmere blended fiber fabric, the breaking strength of the fabric is improved while maintaining the core touch of cashmere, forming a "temperature trigger-humidity synergy" intelligent humidity control system, improving the functional regulation of cashmere fabric, in the process, the performance of "elasticity-softness-durability" is unified, and the in-situ fixation of antibacterial agent in the fiber is also realized, solving the problem of easy falling off of traditional after-treatment functional agent, and zero wastewater discharge, with good environmental protection significance.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cashmere blended fiber fabrics, in particular to a preparation method of a cashmere blended fiber fabric. BACKGROUND

[0002] The cashmere blended fiber fabric refers to a textile fabric prepared by blending cashmere as a main raw material with other natural fibers or functional fabrics through spinning, weaving, dyeing and finishing processes and is suitable for multiple fields.

[0003] However, the existing cashmere blended fiber fabric is mostly blended with traditional natural fibers or ordinary chemical fibers and cashmere in the process of processing and production, only cost control or basic performance improvement is achieved, the cashmere blended fiber fabric cannot dynamically adapt to the environment, and in the actual preparation process, the compatibility of cashmere and other fibers is not optimized, which easily leads to delamination and pilling; in the production process, the production process has high energy consumption, and the traditional water dyeing method is easy to produce a large amount of wastewater, and has the problems of high pollution.

[0004] Therefore, the application provides a preparation method of a cashmere blended fiber fabric. SUMMARY

[0005] The application aims at solving the problems in the prior art and provides a preparation method of a cashmere blended fiber fabric.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme.

[0007] The application provides a preparation method of a cashmere blended fiber fabric.

[0008] The preparation method of the cashmere blended fiber fabric comprises the following steps:

[0009] Step S1, pretreatment: modification of the cashmere fiber and dispersion treatment of the bacterial cellulose nanofiber;

[0010] Step S2, blended preparation: including core yarn preparation, middle layer main body yarn preparation and anti-pilling layer preparation, and three yarns are compounded to form a blended yarn;

[0011] Step S3, digitalized jacquard weaving: using Karl Mayer RJPC 4 / 1 type jacquard machine, presetting fiber shrinkage based on AI algorithm, reserving 0.8% shrinkage compensation amount when designing pattern, weaving gray fabric, and then using pre-shrinking machine and tentering machine to perform gray fabric setting;

[0012] Step S4, dyeing and finishing treatment:

[0013] Dyeing pretreatment: using anhydrous ethanol to clean and remove oil stains, and vacuum drying treatment;

[0014] Dyeing treatment: using HCD-100 type supercritical dyeing machine to perform dyeing treatment;

[0015] Post-treatment: cooling and decompressing to recover CO2 in the dyeing process, spraying 0.5% chitosan solution on the surface to enhance the synergistic antibacterial effect, and baking at 100°C for 3 min.

[0016] As a preferred technical solution of the present application, the method for modifying the cashmere fiber in step S1 is: 50°C warm water pre-washing for 10 min→ enzyme solution treatment for 90 min→ 50°C warm water washing for 2 times→ dehydration;

[0017] The formula of the enzyme solution is: 2.5% owf of alkaline protease with enzyme activity ≥50000 U / g + 1.2% owf of pectinase with enzyme activity ≥20000 U / g, bath ratio 1:15, pH 7.5, and mixing temperature 48°C.

[0018] As a preferred technical solution of the present application, the method for dispersing the nanofiber in step S1 is: mixing bacterial cellulose nanofiber with deionized water at a ratio of 1:10, using ultrasonic assisted dispersion, ultrasonic power 400W, frequency 20kHz, dispersion time 20min, to form a uniform and stable nanofiber sol.

[0019] As a preferred technical solution of the present application, the method for preparing the core yarn in step S2 is:

[0020] The method for preparing the core yarn is: doubling the polybutylene adipate elastic fiber, combining 6 times, roving draft ratio 3.8 times, and forming the core yarn with yarn twist 80 twists / 10cm.

[0021] As a preferred technical solution of the present application, the method for preparing the core yarn in step S2 is:

[0022] The preparation method of the middle layer main yarn is as follows: the pretreated cashmere fibers, the dispersed treated bacterial cellulose nanofibers and the bamboo pulp fibers are mixed by a roller mixer, so that the water content is controlled at 12%, and then the mixed fibers are formed into slivers by a carding machine, wherein the speed of the cylinder is 320 r / min, the speed of the doffer is 20 r / min, and the evenness CV value of the sliver is less than or equal to 10%; the roving twist is 50 twists / 10 cm, and the yarn twist is 100 twists / 10 cm.

[0023] As a preferred technical solution of the present application, in the step S2

[0024] The preparation method of the anti-pilling layer is as follows: the PNIPAM grafted modified polyester, the polydopamine coated basalt staple fiber and the crosslinking agent are mixed, and the anti-pilling layer is formed by covering spinning through a vacuum spindle;

[0025] The three-yarn composite yarn is formed by using a ring spinning composite device, and the feeding ratio of the core yarn, the middle layer main yarn and the anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10 cm.

[0026] As a preferred technical solution of the present application, in the step S3, the parameters of the pre-shrinking machine are as follows: the temperature is 110 DEG C, the overfeed amount is 8%, and the speed is 15 m / min; the tension of the tenter is 70 N, the temperature is 120 DEG C, the width is shaped to 150 cm, and the weight of the shaped gray fabric is 280 g / m 2 .

[0027] As a preferred technical solution of the present application, in the step S4, when the supercritical dyeing machine HCD-100 is used for supercritical dyeing, the process parameters are as follows: the temperature is 125 DEG C, the pressure is 22 MPa, the CO2 flow is 22 L / h, the dye is a mixture of 2%owf dispersing red 3B and 1%owf, and the particle size of the nano zinc oxide is 50 nm.

[0028] As a preferred technical solution of the present application, the crosslinking agent is citric acid.

[0029] The present application has the following beneficial effects:

[0030] 1. In the formula, the introduction of bacterial cellulose nanofibers improves the breaking strength of the fabric while maintaining the core touch of cashmere, solving the contradiction of "enhancing hardness" in traditional blending; and through the collocation of PNIPAM grafted modified polyester and bamboo pulp fibers, the dynamic adjustment of the fabric in the air permeability is realized, and the high moisture regain of bamboo pulp fibers is used to accelerate the moisture conduction, forming a "temperature triggered-humidity synergistic" intelligent humidity regulating system, and improving the functional regulation of cashmere fabric.

[0031] 2. In the process, the three-dimensional structure of "core yarn-cashmere main body-middle layer-outer anti-pilling coating" is realized by the way of three-layer gradient spinning process, the performance of "elasticity-softness-durability" is unified, and the performance balance limit of traditional blended fabric is broken; through the design of supercritical dyeing process, the integration of supercritical dyeing and in-situ functionalization is realized, under the process condition of 125℃ / 22MPa, the synchronous penetration of disperse dyes and nano zinc oxide is realized, and through temperature control, the heat damage of cashmere is avoided, at the same time, the in-situ fixation of antibacterial agent in the fiber is achieved, the problem of easy falling of traditional finishing functional agent is solved, and the wastewater is zero discharge, which reaches excellent environmental protection index.

[0032] In summary, in the process of making the cashmere blended fiber fabric, the breaking strength of the fabric is improved while the cashmere core touch is maintained, an intelligent humidity regulating system of "temperature trigger-humidity synergy" is formed, the functional regulation of cashmere fabric is improved, in the process, the performance of "elasticity-softness-durability" is unified, the in-situ fixation of antibacterial agent in the fiber is also realized, the problem of easy falling of traditional finishing functional agent is solved, and the wastewater is zero discharge, which has good environmental protection significance. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in a clear and complete manner. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0034] Embodiment one

[0035] A preparation method of a cashmere blended fiber fabric, the cashmere blended fiber fabric is composed of the following raw materials by weight: 50 parts of cashmere fiber, 3 parts of polybutylene adipate elastomeric fiber, 5 parts of bacterial cellulose nanofiber, 17 parts of PNIPAM grafted modified polyester, 6 parts of polydopamine coated basalt short fiber, 8 parts of bamboo pulp fiber, and 0.8 parts of crosslinking agent.

[0036] The preparation method of the cashmere blended fiber fabric includes the following steps:

[0037] Step S1, pretreatment: modification of cashmere fiber and dispersion treatment of bacterial cellulose nanofiber;

[0038] Step S2, blended preparation: including core yarn preparation, middle layer main yarn preparation and anti-pilling layer preparation, and three yarns are compounded to form blended yarn;

[0039] Step S3, digital jacquard weaving: Karl Mayer RJPC 4 / 1 type jacquard machine is adopted, AI algorithm is used to preset the fiber shrinkage rate, 0.8% shrinkage compensation is reserved during pattern design, and gray fabric is woven, and then pre-shrinking machine and tentering machine are used for gray fabric setting;

[0040] Step S4, dyeing and finishing treatment:

[0041] Dyeing pretreatment: clean and remove oil stains with anhydrous ethanol, and vacuum drying treatment;

[0042] Dyeing treatment: dyeing treatment with HCD-100 type supercritical dyeing machine;

[0043] Post-treatment: cool down and recover CO2 in the dyeing process, spray 0.5% chitosan solution on the surface to enhance the synergistic effect of antibacterial, and bake at 100°C for 3min.

[0044] The method for modifying cashmere fibers in step S1 is: 50°C warm water pre-washing for 10min→ enzyme solution treatment for 90min→ 50°C warm water washing for 2 times→ dehydration;

[0045] The formula of the enzyme solution is: 2.5% owf, alkaline protease with enzyme activity ≥50000U / g + 1.2% owf, pectinase with enzyme activity ≥20000U / g, bath ratio 1:15, pH 7.5, mixed temperature 48°C.

[0046] The method for dispersing nanofibers in step S1 is: mixing bacterial cellulose nanofibers with deionized water at a ratio of 1:10, using ultrasonic assisted dispersion, ultrasonic power 400W, frequency 20kHz, dispersion time 20min, forming a uniform and stable nanofiber sol.

[0047] In step S2,

[0048] The core yarn preparation method is: doubling the polybutylene adipate elastic fiber, combining 6 times, roving draft ratio 3.8 times, yarn twist 80 twists / 10cm, forming the core yarn.

[0049] In step S2,

[0050] The preparation method of the middle layer main yarn is: mixing the pretreated cashmere fibers and the dispersed bacterial cellulose nanofibers and bamboo pulp fibers through a drum mixer, controlling the moisture content to be 12%, and then passing through a carding machine to form a sliver, the carding machine processing speed is 320r / min, the doffer speed is 20r / min, the sliver uniformity CV value is ≤10%; the roving twist is 50 twists / 10cm, and the yarn twist is 100 twists / 10cm.

[0051] In step S2,

[0052] The preparation method of the anti-pilling layer is: mixing PNIPAM grafted modified polyester, polydopamine coated basalt short fibers and crosslinking agent, and using vacuum spindle coating spinning to form the anti-pilling layer;

[0053] Three yarn composite yarn: adopt ring spinning composite device to form blended yarn, the feeding ratio of core yarn, middle layer main yarn and anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10cm.

[0054] The parameters of the pre-shrinking machine in step S3 are: temperature 110℃, overfeed 8%, speed 15m / min; the tension of the tentering machine is 70N, the temperature is 120℃, the width is shaped to 150cm, and the weight of the blank fabric after shaping is 280g / m 2 .

[0055] In step S4, when using HCD-100 supercritical dyeing machine for supercritical dyeing, the process parameters are as follows: temperature 125℃, pressure 22MPa, CO2 flow rate 22L / h, dye is 2%owf dispersed red 3B mixed with 1%owf, and particle size is 50nm.

[0056] The crosslinking agent is citric acid.

[0057] Example two

[0058] A preparation method of a cashmere blended fiber fabric, the cashmere blended fiber fabric is composed of the following raw materials in parts by weight: cashmere fiber 55 parts, polybutylene succinate elastic fiber 4 parts, bacterial cellulose nanofiber 6 parts, PNIPAM grafted modified polyester 20 parts, polydopamine coated basalt short fiber 8 parts, bamboo pulp fiber 10 parts, crosslinking agent 1.2 parts;

[0059] The preparation method of the cashmere blended fiber fabric includes the following steps:

[0060] Step S1, pretreatment: modification of cashmere fiber and dispersion treatment of bacterial cellulose nanofiber;

[0061] Step S2, blended yarn preparation: including core yarn preparation, middle layer main yarn preparation and anti-pilling layer preparation, and three yarns are compounded to form blended yarn;

[0062] Step S3, digitalized jacquard weaving: using Karl Mayer RJPC 4 / 1 type jacquard machine, presetting fiber shrinkage based on AI algorithm, reserving 0.8% shrinkage compensation during pattern design, and weaving blank fabric, and then using pre-shrinking machine and tentering machine to shape the blank fabric;

[0063] Step S4, dyeing and finishing treatment:

[0064] Dyeing pretreatment: using anhydrous ethanol for cleaning to remove oil stains, and vacuum drying treatment;

[0065] Dyeing treatment: using HCD-100 type supercritical dyeing machine for dyeing treatment;

[0066] Post-processing: cooling and decompression to recover CO2 in the dyeing process, surface spraying 0.5% chitosan solution, enhancing the synergistic effect of antibacterial, 100℃ baking for 3min.

[0067] The method for modifying cashmere fibers in step S1 is: 50℃ warm water pre-washing for 10min→ enzyme solution treatment for 90min→ 50℃ warm water washing for 2 times→ dehydration;

[0068] The formula of the enzyme solution is: 2.5% owf, alkaline protease with enzyme activity ≥50000U / g + 1.2% owf, pectinase with enzyme activity ≥20000U / g, bath ratio 1:15, pH 7.5, mixing temperature 48℃.

[0069] The method for dispersing nanofibers in step S1 is: mixing bacterial cellulose nanofibers with deionized water at a ratio of 1:10, using ultrasonic assisted dispersion, ultrasonic power 400W, frequency 20kHz, dispersion time 20min, forming a uniform and stable nanofiber sol.

[0070] In step S2,

[0071] The core yarn preparation method is: two drawing of polybutylene adipate elastic fiber, and the number of combination is 6, the roving draft ratio is 3.8 times, the yarn twist is 80 twists / 10cm, forming the core yarn.

[0072] In step S2,

[0073] The preparation method of the middle layer main yarn is: mixing the pretreated cashmere fibers and the dispersed bacterial cellulose nanofibers and bamboo pulp fibers through a drum mixer, controlling the moisture content to be 12%, and then passing through a carding machine to form a sliver, the carding machine processing speed is 320r / min, the doffer speed is 20r / min, the sliver uniformity CV value is ≤10%; the roving twist is 50 twists / 10cm, and the yarn twist is 100 twists / 10cm.

[0074] In step S2,

[0075] The preparation method of the anti-pilling layer is: mixing PNIPAM grafted modified polyester, polydopamine coated basalt short fibers and crosslinking agent, and using vacuum spindle coating spinning to form the anti-pilling layer.

[0076] Three yarn composite yarn: using ring spinning composite device to form blended yarn, the feeding ratio of core yarn, middle layer main yarn and anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10cm.

[0077] The parameters of the pre-shrinking machine in step S3 are: temperature 110℃, overfeed 8%, and speed 15m / min; the tension of the tentering machine is 70N, the temperature is 120℃, the width of the fabric is shaped to 150cm, and the weight of the fabric after shaping is 280g / m 2 .

[0078] In step S4, when the supercritical dyeing machine HCD-100 is used for supercritical dyeing, the process parameters are as follows: temperature 125℃, pressure 22MPa, CO2 flow rate 22L / h, and the dye is a mixture of 2%owf dispersed red 3B and 1%owf, 50nm particle size nano zinc oxide swelling.

[0079] The crosslinking agent is citric acid.

[0080] Example Three

[0081] A preparation method of a cashmere blended fiber fabric, wherein the cashmere blended fiber fabric is composed of the following raw materials in parts by weight: cashmere fiber 60 parts, polybutylene succinate elastic fiber 5 parts, bacterial cellulose nanofiber 8 parts, PNIPAM grafted modified polyester 22 parts, polydopamine coated basalt short fiber 10 parts, bamboo pulp fiber 12 parts, and crosslinking agent 1.5 parts.

[0082] The preparation method of the cashmere blended fiber fabric includes the following steps:

[0083] Step S1, pretreatment: modification of the cashmere fiber and dispersion treatment of the bacterial cellulose nanofiber;

[0084] Step S2, blended yarn preparation: including core yarn preparation, middle layer main yarn preparation, and anti-pilling layer preparation, and the three yarns are compounded to form a blended yarn;

[0085] Step S3, digitalized jacquard weaving: using a Karl Mayer RJPC 4 / 1 type jacquard machine, presetting the fiber shrinkage rate based on AI algorithm, reserving 0.8% shrinkage compensation during pattern design, and weaving the gray fabric, and then using a pre-shrinking machine and a tentering machine to shape the gray fabric;

[0086] Step S4, dyeing and finishing treatment:

[0087] Dyeing pretreatment: using anhydrous ethanol for cleaning to remove oil stains, and vacuum drying treatment;

[0088] Dyeing treatment: using a HCD-100 type supercritical dyeing machine for dyeing treatment;

[0089] Post-treatment: cooling and decompression to recover CO2 in the dyeing process, spraying 0.5% chitosan solution on the surface to enhance the antibacterial synergistic effect, and baking at 100℃ for 3min.

[0090] The method for modifying cashmere fibers in step S1 is: pre-washing at 50°C for 10 min, enzyme treatment for 90 min, washing with 50°C warm water twice, and dehydration.

[0091] The formula of the enzyme solution is: 2.5% owf of alkaline protease with an enzyme activity of ≥50000 U / g + 1.2% owf of pectinase with an enzyme activity of ≥20000 U / g, bath ratio 1:15, pH 7.5, and mixing temperature 48°C.

[0092] The method for dispersing the nanofibers in step S1 is: mixing bacterial cellulose nanofibers with deionized water at a ratio of 1:10, using ultrasonic-assisted dispersion, ultrasonic power 400 W, frequency 20 kHz, and dispersion time 20 min, to form a uniform and stable nanofiber sol.

[0093] In step S2,

[0094] The method for preparing the core yarn is: doubling and drawing the polybutylene adipate elastic fiber, combining 6 strands, drawing the roving at a ratio of 3.8 times, and forming the core yarn with a yarn twist of 80 twists / 10 cm.

[0095] In step S2,

[0096] The method for preparing the middle layer main yarn is: mixing the pretreated cashmere fibers, the dispersed bacterial cellulose nanofibers, and the bamboo pulp fibers through a drum mixer to control the moisture content at 12%, and then passing through a carding machine to form a sliver, wherein the speed of the cylinder is 320 r / min, the speed of the doffer is 20 r / min, the uniformity of the sliver is ≤10%, the roving twist is 50 twists / 10 cm, and the yarn twist is 100 twists / 10 cm.

[0097] In step S2,

[0098] The method for preparing the anti-pilling layer is: mixing the PNIPAM grafted modified polyester, the polydopamine coated basalt staple fiber, and the crosslinking agent, and using a vacuum spindle to cover and spin to form the anti-pilling layer.

[0099] Three yarns are compounded into a yarn: using a ring spinning device to form a blended yarn, and the feeding ratio of the core yarn, the middle layer main yarn, and the anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10 cm.

[0100] The parameters of the pre-shrinking machine in step S3 are: temperature 110°C, overfeed 8%, and speed 15 m / min; the tension of the tentering machine is 70 N, the temperature is 120°C, the width is shaped to 150 cm, and the weight of the shaped gray fabric is 280 g / m 2 .

[0101] The crosslinking agent is citric acid.

[0102] Comparative Example 1

[0103] A preparation method of cashmere blended fiber fabric, wherein the cashmere blended fiber fabric is composed of the following raw materials in parts by weight: cashmere fiber 55 parts, polybutylene succinate elastic fiber 4 parts, PNIPAM grafted modified polyester 20 parts, polydopamine coated basalt staple fiber 8 parts, bamboo pulp fiber 10 parts, crosslinking agent 1.2 parts;

[0104] The preparation method of the cashmere blended fiber fabric comprises the following steps:

[0105] Step S1, pretreatment: modifying the cashmere fiber;

[0106] Step S2, blended preparation: including core yarn preparation, middle layer main yarn preparation, and anti-pilling layer preparation, and combining the three yarns to form a blended yarn;

[0107] Step S3, digitalized jacquard weaving: using a Karl Mayer RJPC 4 / 1 type jacquard machine, presetting the fiber shrinkage rate based on AI algorithm, reserving a shrinkage compensation of 0.8% when designing the pattern, weaving the gray fabric, and then using a pre-shrinking machine and a tentering machine to set the gray fabric;

[0108] Step S4, dyeing and finishing treatment:

[0109] Dyeing pretreatment: using anhydrous ethanol for cleaning to remove oil stains, and vacuum drying treatment;

[0110] Dyeing treatment: using an HCD-100 type supercritical dyeing machine for dyeing treatment;

[0111] Post-treatment: cooling and decompressing to recover CO2 in the dyeing process, spraying 0.5% chitosan solution on the surface to enhance the antibacterial synergistic effect, and baking at 100°C for 3 minutes.

[0112] The method for modifying the cashmere fiber in step S1 is: 50°C warm water pre-washing for 10 minutes → enzyme solution treatment for 90 minutes → 50°C warm water washing for 2 times → dehydration;

[0113] The formula of the enzyme solution is: 2.5% owf of alkaline protease with enzyme activity ≥50000 U / g + 1.2% owf of pectinase with enzyme activity ≥20000 U / g, bath ratio 1:15, pH 7.5, mixing temperature 48°C.

[0114] In step S2,

[0115] The method for preparing the core yarn is: doubling the polybutylene succinate elastic fiber for two times, combining 6 ends, roving draft ratio 3.8 times, and forming the core yarn with a yarn twist of 80 twists / 10 cm.

[0116] In step S2,

[0117] The preparation method of the middle layer main yarn is that the pretreated cashmere fiber and the dispersed treated bacterial cellulose nanofiber and bamboo pulp fiber are mixed by a drum mixer, so that the water content is controlled at 12%, and then the cotton sliver is formed by a carding machine. When the carding machine is processed, the speed of the cylinder is 320 r / min, the speed of the doffer is 20 r / min, and the evenness CV value of the formed cotton sliver is less than or equal to 10%. The roving twist is 50 twists / 10 cm, and the spun yarn twist is 100 twists / 10 cm.

[0118] In step S2, the step S2 is performed by using the following method:

[0119] The preparation method of the anti-pilling layer is that the PNIPAM grafted modified polyester, the polydopamine coated basalt short fiber and the crosslinking agent are mixed, and the anti-pilling layer is formed by using a vacuum spindle covering spinning.

[0120] The three-yarn composite yarn is formed by using a ring spinning composite device. The feeding ratio of the core yarn, the middle layer main yarn and the anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10 cm.

[0121] In step S3, the parameters of the pre-shrinking machine are as follows: the temperature is 110 ℃, the overfeed amount is 8%, and the speed is 15 m / min. The tension of the tentering machine is 70 N, the temperature is 120 ℃, the width is shaped to 150 cm, and the weight of the shaped gray fabric is 280 g / m 2 .

[0122] In step S4, when the supercritical dyeing machine HCD-100 is used for supercritical dyeing, the process parameters are as follows: the temperature is 125 ℃, the pressure is 22 MPa, the CO2 flow is 22 L / h, the dye is a mixture of 2% owf of disperse red 3B and 1% owf of nano zinc oxide with a particle size of 50 nm, and the mixture is swelled.

[0123] The crosslinking agent is citric acid.

[0124] Comparative Example Two

[0125] A preparation method of a cashmere blended fiber fabric, wherein the cashmere blended fiber fabric is composed of the following raw materials in parts by weight: cashmere fiber 60 parts, polybutylene succinate elastic fiber 5 parts, bacterial cellulose nanofiber 8 parts, PNIPAM grafted modified polyester 22 parts, polydopamine coated basalt short fiber 10 parts, bamboo pulp fiber 12 parts, and crosslinking agent 1.5 parts.

[0126] The preparation method of the cashmere blended fiber fabric includes the following steps:

[0127] Step S1, pretreatment: modification of the cashmere fiber and dispersion treatment of the bacterial cellulose nanofiber;

[0128] Step S2, blending preparation: including core yarn preparation, middle layer main yarn preparation, and anti-pilling layer preparation, and three yarns are compounded to form a blended yarn;

[0129] Step S3, digitalized jacquard weaving: using a Karl Mayer RJPC 4 / 1 type jacquard machine, presetting fiber shrinkage based on an AI algorithm, reserving a shrinkage compensation of 0.8% when designing a pattern, weaving a gray fabric, and then using a pre-shrinking machine and a tentering machine to perform gray fabric setting;

[0130] Step S4, dyeing and finishing treatment:

[0131] Dyeing pretreatment: using anhydrous ethanol to clean and remove oil stains, and vacuum drying treatment;

[0132] Dyeing treatment: using traditional water dyeing method for dyeing treatment.

[0133] The method for modifying the cashmere fiber in step S1 is: 50°C warm water pre-washing for 10 min → enzyme solution treatment for 90 min → 50°C warm water washing for 2 times → dehydration;

[0134] The formula of the enzyme solution is: 2.5% owf, alkaline protease with enzyme activity ≥50000 U / g + 1.2% owf, pectinase with enzyme activity ≥20000 U / g, bath ratio 1:15, pH 7.5, mixing temperature 48°C.

[0135] The method for dispersing the nanofiber in step S1 is: mixing bacterial cellulose nanofiber and deionized water at a ratio of 1:10, using ultrasonic assisted dispersion, ultrasonic power 400W, frequency 20kHz, dispersion time 20min, forming a uniform and stable nanofiber sol.

[0136] In step S2,

[0137] The method for preparing the core yarn is: doubling the polybutylene adipate elastic fiber, combining 6 ends, roving draft ratio 3.8 times, and forming a core yarn with a yarn twist of 80 twists / 10cm.

[0138] In step S2,

[0139] The method for preparing the middle layer main yarn is: mixing the pretreated cashmere fiber, the dispersed bacterial cellulose nanofiber, and the bamboo pulp fiber through a drum mixer to control the moisture content to 12%, and then passing through a carding machine to form a sliver, the carding machine processing speed is 320r / min, the doffer speed is 20r / min, and the sliver uniformity CV value is ≤10%; the roving twist is 50 twists / 10cm, and the yarn twist is 100 twists / 10cm.

[0140] In step S2,

[0141] The preparation method of the anti-pilling layer is: mixing the PNIPAM grafted modified polyester, the polydopamine coated basalt short fiber and the crosslinking agent, and adopting the vacuum spindle coating spinning to form the anti-pilling layer.

[0142] The three-yarn composite yarn is formed by adopting the ring spinning device, the feeding ratio of the core yarn, the middle layer main body yarn and the anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10 cm.

[0143] The parameters of the pre-shrinking machine in step S3 are: temperature 110 DEG C, overfeed amount 8%, and speed 15 m / min; the tension of the tentering machine is 70 N, the temperature is 120 DEG C, the width is shaped to 150 cm, and the weight per unit area of the shaped grey cloth is 280 g / m 2 .

[0144] The crosslinking agent is citric acid.

[0145] In the comparative example three, the untreated pure cashmere fabric is adopted;

[0146] In the comparative example four, the traditional cashmere blending is adopted, and the cashmere with a content of 55%, the polyester with a content of 25% and the viscose with a content of 20% are processed by using the conventional process;

[0147] Then, the above materials are tested from the breaking strength, the pilling grade, the air permeability, the temperature-sensitive air permeability adjustment rate, the size change rate after washing, the wastewater COD discharge and the antibacterial durability, and the data in Table 1 are obtained.

[0148] Table 1

[0149]

[0150]

[0151] It can be known from the table that:

[0152] 1. The breaking strength of the example one, the example two and the example three reaches 4.8 cN / dtex by the whole process of the scheme, and the pilling grade is 4-5 grade, the strength is greatly improved compared with the control group, and the pilling grade is obviously improved, which indicates that the scheme can effectively enhance the strength and the anti-pilling property of the fabric in the innovation of the raw materials such as the bacterial cellulose and the PNIPAM modified polyester and the process improvement such as the gradient spinning and the supercritical dyeing.

[0153] The breaking strength of the comparative example one is reduced to 4.2 cN / dtex after removing the bacterial cellulose, and the pilling grade is 3-4 grade, which indicates that the bacterial cellulose plays an important role in improving the strength and the anti-pilling property.

[0154] The comparative example three and the comparative example four do not have the temperature-sensitive air permeability adjustment function, while the example realizes the temperature-sensitive air permeability adjustment rate of 35%, which reflects the unique functional advantages of the PNIPAM modified polyester.

[0155] And in the antibacterial durability, the antibacterial rate of the comparative example four is only 35% after 50 times of washing, the antibacterial rate of the example is 92% by supercritical dyeing and in-situ functionalization, the antibacterial rate of the comparative example two is reduced to 65% after using traditional water dyeing, which shows that the supercritical dyeing process has better fixing effect on the functional agent and can significantly improve the antibacterial durability of the fabric.

[0156] The example uses supercritical CO2 waterless dyeing, and the COD emission of waste water is less than or equal to 50 mg / L, which is reduced by 80%; the comparative example two uses traditional water dyeing, and the COD emission of waste water is increased to 200 mg / L, which fully proves that the supercritical dyeing process has great advantages in environmental protection.

[0157] The performance of the example is significantly better than that of the comparative examples and other examples, which shows that the raw material formula and process improvement of the present scheme is an organic whole, and each link is coordinated with each other, so that the performance is comprehensively improved.

[0158] The above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, the skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for preparing a cashmere blended fiber fabric, characterized in that, The cashmere blended fiber fabric is composed of the following raw materials in parts by weight: 50-60 parts cashmere fiber, 3-5 parts polybutylene adipate elastic fiber, 5-8 parts bacterial cellulose nanofiber, 17-22 parts PNIPAM grafted modified polyester, 6-10 parts polydopamine-coated basalt short fiber, 8-12 parts bamboo pulp fiber, and 0.8-1.5 parts crosslinking agent; The method for preparing the cashmere blended fiber fabric includes the following steps: Step S1, Pretreatment: Impurity removal and modification of cashmere fibers and dispersion treatment of bacterial cellulose nanofibers; Step S2, Blended yarn preparation: This includes the preparation of core yarn, middle layer main yarn, and anti-pilling layer, and the three yarns are combined to form a blended yarn; Step S3, Digital Jacquard Weaving: Using a Karl Mayer RJPC 4 / 1 jacquard machine, the fiber shrinkage rate is preset based on AI algorithm, and a shrinkage compensation of 0.8% is reserved when designing the pattern. The greige fabric is woven, and then a pre-shrinking machine and a tenter frame are used to shape the greige fabric. Step S4, Dyeing and Finishing: Dyeing pretreatment: Cleaning with anhydrous ethanol to remove oil stains, followed by vacuum drying; Staining treatment: Staining treatment was carried out using an HCD-100 supercritical staining machine; Post-treatment: Cool and depressurize to recover CO2 from the dyeing process, spray the surface with 0.5% chitosan solution to enhance the antibacterial synergistic effect, and bake at 100℃ for 3 minutes.

2. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, The method for impurity removal and modification of cashmere fibers in step S1 is as follows: pre-washing with 50°C warm water for 10 min → enzyme treatment for 90 min → washing twice with 50°C warm water → dehydration; The enzyme solution formula is as follows: 2.5% owf alkaline protease with enzyme activity ≥50000U / g + 1.2% owf pectinase with enzyme activity ≥20000U / g, bath ratio 1:15, pH 7.5, mixing temperature 48℃.

3. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, The method for dispersing nanofibers in step S1 is as follows: bacterial cellulose nanofibers are mixed with deionized water at a ratio of 1:10, and ultrasonic-assisted dispersion is performed with an ultrasonic power of 400W, a frequency of 20kHz, and a dispersion time of 20min to form a uniform and stable nanofiber sol.

4. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, In step S2 The core yarn preparation method is as follows: two polybutylene adipate elastic fibers are combined into a single strand, with a total of 6 strands. The roving has a draft ratio of 3.8 times, and the yarn has a twist of 80 twists / 10cm to form the core yarn.

5. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, In step S2 The preparation method of the middle layer main yarn is as follows: the pretreated cashmere fiber, the dispersed bacterial cellulose nanofiber and bamboo pulp fiber are mixed by a roller mixer to control the moisture content at 12%, and then formed into a sliver by a carding machine. During the carding machine processing, the cylinder speed is 320 r / min and the doffer speed is 20 r / min. The uniformity CV value of the sliver is ≤10%; the roving twist is 50 twists / 10cm and the yarn twist is 100 twists / 10cm.

6. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, In step S2 The anti-pilling layer is prepared by mixing PNIPAM-grafted modified polyester with polydopamine-coated basalt short fibers and a crosslinking agent, and then forming the anti-pilling layer by vacuum spin-coating. Three-yarn composite yarn: The ring spinning composite device is used to form the blended yarn. The feeding ratio of core yarn, middle layer main yarn and anti-pilling layer is 1:3:2, and the total twist is 150 twists / 10cm.

7. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, In step S3, the parameters for the pre-shrinking machine are: temperature 110℃, overfeed 8%, machine speed 15m / min; tension of the tenter frame 70N, temperature 120℃, width set to 150cm, and fabric weight after setting 280g / m². 2 .

8. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, In step S4, when supercritical dyeing is performed using an HCD-100 supercritical dyeing machine, the process parameters are as follows: temperature 125℃, pressure 22MPa, CO2 flow rate 22L / h, and the dye is a mixture of 2% owf Disperse Red 3B and 1% owf nano zinc oxide with a particle size of 50nm, which is swollen.

9. The method for preparing a cashmere blended fiber fabric according to claim 1, characterized in that, The crosslinking agent is citric acid.

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