Nylon / China-hemp / lyocell interwoven fabric and dyeing and finishing processing technology thereof

Abstract

The invention discloses a chinlon / China-hemp / lyocell interwoven fabric, which is formed by alternately beating up and interweaving first weft yarns and second weft yarns according to a certain proportion by taking chinlon fibers as warp yarns, taking chinlon fibers as first weft yarns and taking China-hemp / lyocell blended yarns as second weft yarns, the weight ratio of the China-hemp fibers in the China-hemp / lyocell blended yarns is 30-55%, the weight ratio of the lyocell fibers in the China-hemp / lyocell blended yarns is 45-70%, the content of the China-hemp fibers in the interwoven fabric is 13-26%, the content of the lyocell fibers in the interwoven fabric is 20-29%, and the content of the polyamide fibers in the interwoven fabric is 54-58%. According to the invention, the influence on the fiber strength and the like in the dyeing and finishing process of the interwoven fabric is avoided, so that the interwoven fabric integrates the respective advantages of various fibers, has comfort, functionality and environmental protection property, and also can meet the basic requirements of optimal mechanical properties, wear resistance, color yield, width reduction, smoothness and the like of the fabric; the wearability of the interwoven fabric is greatly improved, and the interwoven fabric is suitable for industrial batch production.

Description

Technical Field

[0001] The invention belongs to the technical field of textile dyeing and finishing, and in particular relates to a nylon / hemp / lyocell interwoven fabric and a dyeing and finishing process thereof. Background Art

[0002] As people's living standards improve, their demands for fabrics are becoming more and more diverse, and their requirements for comfort and functionality are constantly increasing. Among them, interwoven fabrics and blended fabrics are widely favored by consumers because of their softness, higher comfort, diverse styles and high durability, and have become the main application types in the field of clothing fabrics.

[0003] Among them, interwoven fabrics can improve the overall performance of fabrics by combining the advantages of different fibers, and their unique texture and visual effects make the products more design-oriented and fashionable. For example, the imitation denim weft elastic fabric composed of cotton yarn in the warp direction and polyester and spandex coated yarn in the weft direction not only improves the feel of the yarn-dyed denim elastic fabric, but also maintains the advantages of polyester. Blended fabrics combine the advantages of chemical fibers and natural fibers, and have the advantages of diverse styles; and absorb the respective advantages of cotton, linen, silk, wool and chemical fibers, and are warm and comfortable, sterilizing, breathable and cool, and have high comfort; blended fabrics have good elasticity and wear resistance in dry and wet conditions, stable dimensions, small shrinkage, and are upright, not easy to wrinkle, easy to wash, and quick-drying, which greatly improves durability; and because blended fabrics can adjust the fiber ratio as needed to meet different usage needs, such as cotton and bamboo fiber blended fabrics have both the warmth and comfort advantages of cotton and the sterilization, breathability and coolness advantages of bamboo fiber, so they have multiple functions.

[0004] Currently, similar products on the market are mainly nylon / cotton interwoven fabrics or nylon / cotton or linen / cotton blended fabrics. Among them, the overall strength and durability of fabrics with pure cotton yarn as weft yarn interwoven with nylon are seriously reduced after enzyme treatment. However, due to the strong cohesion of nylon fiber, the yarn blended with nylon and cotton fibers has more serious pilling phenomenon, resulting in poor wearing performance.

[0005] As a synthetic fiber, nylon has the characteristics of high strength, wear resistance, and good weather resistance; hemp is known for its natural breathability, antibacterial properties, and good moisture absorption; while Tencel fiber is favored for its softness, smoothness, eco-friendly, moisture absorption, and quick drying properties. However, a single material or blended fabric is difficult to meet all needs, so it is particularly important to develop a woven fabric that combines the advantages of the three.

[0006] CN104480746A discloses a one-bath one-step dyeing process for blended or interwoven fabrics of cotton and nylon, and belongs to the technical field of textile printing and dyeing. The method of the invention utilizes the difference in dyeing performance of different reactive dyes on cotton and nylon fibers, and dyes the blended or interwoven fabrics of nylon and cotton at 80-95°C, and achieves the same color or different color effects by mastering the characteristics of the dyes and matching the dyes with different groups.

[0007] CN101538762A discloses a nylon yarn and rayon interwoven fabric and a weaving method thereof. The interwoven fabric is a jacquard variation structure, which is interwoven with 20D-30D ultra-fine denier nylon single-hole yarn as warp and pure rayon yarn as weft in a certain proportion. On the basis of retaining the advantages of rayon such as good dyeability, bright color, and comfortable effect, the stiffness and flatness are greatly improved, thereby solving the problem that the application field of rayon is limited due to its characteristics. The surface of the interwoven fabric has a flashing jacquard effect, bright color after dyeing, comfortable hand feeling, flatness, good garment effect, and good wrinkle resistance, and can be applied to fashion fabrics.

[0008] CN 118308894 A Dyeing and finishing method for nylon, cotton and linen blended or interwoven fabrics. The fiber materials of the nylon, cotton and linen blended or interwoven fabrics of the present invention include nylon, cotton, linen and spandex, and the dyeing and finishing method includes the following steps in sequence: singeing, cold-batch bleaching, washing, mercerizing, dyeing and tentering, wherein dyeing includes enzyme washing. The fabric obtained by the present invention overcomes the problems of easy wrinkling, rough and itchy touch, long hairiness and poor appearance of cotton and linen blended fabrics, and greatly improves the fabric in terms of quality and touch, thereby obtaining high-quality fabrics with high finish and comfortable touch.

[0009] It can be seen from the above patent technology that the current interwoven fabric mainly solves the dyeing problem, or only gives different fiber ratios to obtain interwoven fabrics, and does not mention the mechanical properties, wear resistance, color yield, shrinkage, smoothness and other properties of the fabric in the later stage. As we all know, in order to improve the wearability of textiles, almost all textiles need to be dyed and finished before they can meet the requirements of clothing, decoration, industry and national defense for textile performance and quality. Since interwoven fabrics are composed of at least two fibers, they will not only cause color difference, color flower and color fastness and other dyeing problems during dyeing and finishing, but also will inevitably destroy the mechanical properties, wear resistance, color yield, shrinkage, smoothness and other indicators of each fiber to a certain extent. When different types of fibers are treated in the same dyeing and finishing solution, the changes in the above various indicators are different, which ultimately leads to the various fibers in the interwoven fabric showing different properties and being difficult to control, so that the final comprehensive performance of the interwoven fabric is affected. So how to comprehensively consider the various performance indicators of various fibers and obtain interwoven fabrics with the best wearability is the current key development direction of interwoven fabrics.

[0010] Therefore, how to make the advantages of various fibers fully display in interwoven fabrics, effectively avoid various problems caused by yarns when nylon is blended with cellulose such as linen and cotton, and at the same time avoid the influence of interwoven fabrics on fiber strength and other aspects during dyeing and finishing, so that interwoven fabrics can combine the advantages of various fibers, have comfort, functionality, and environmental protection, while taking into account the basic requirements of fabrics such as the best mechanical properties, wear resistance, color yield, shrinkage, smoothness, etc., has become a difficult problem that technicians in the field of textile dyeing and finishing need to solve urgently. Summary of the invention

[0011] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a nylon / hemp / lyocell interwoven fabric and its dyeing and finishing process which can have comfort and functionality while taking into account good comprehensive properties such as mechanical properties, wear resistance, color yield, shrinkage rate, smoothness, etc.

[0012] In order to solve the above technical problems, the technical solution adopted by the present invention is: a nylon / hemp / lyocell interwoven fabric, the fabric is composed of nylon fiber as warp yarn, nylon fiber as first weft yarn, hemp / lyocell blended yarn as second weft yarn, the first weft yarn and the second weft yarn are alternately wefted and interwoven in a certain proportion, the weight proportion of hemp fiber in the hemp / lyocell blended yarn is 30-55%, the weight proportion of lyocell fiber is 45-70%, the content of hemp fiber in the interwoven fabric is 13-26%, the content of lyocell fiber is 20-29%, and the content of nylon fiber is 54-58%.

[0013] In the above-mentioned nylon / hemp / lyocell interwoven fabric, the ratio of alternating weft beating between the first weft yarn and the second weft yarn is 1:1-2, and the count of the hemp / lyocell blended yarn is 11-21s.

[0014] The above-mentioned nylon / hemp / lyocell interwoven fabric has an F number range of 48 for the nylon fiber and a strength of ≥4.5 cN / dtex, a breaking strength of the hemp / lyocell blended yarn of ≥250 cN, and a yarn evenness CV% range of 15-25%.

[0015] A nylon / hemp / lyocell interwoven fabric, the fabric has a double-layer structure formed by alternately beating and interweaving the first weft yarn and the second weft yarn at a ratio of 2:1, the weight proportion of hemp fiber in the hemp / lyocell blended yarn is 55%, the weight proportion of lyocell fiber is 45%, the content of hemp fiber in the interwoven fabric is 15%, the content of lyocell fiber is 13%, the content of nylon fiber is 66%, and the content of spandex is 6%.

[0016] The above-mentioned nylon / hemp / lyocell interwoven fabric, the spandex core-spun yarn is prepared with spandex filaments as core yarn and nylon filaments as outer wrapping yarn, the draft multiple range is 2.0-7.5, the hemp fiber splitting degree is ≥3000N, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the yarn CV% range is 15-25%.

[0017] A dyeing and finishing process for nylon / hemp / lyocell interwoven fabrics, comprising the following steps:

[0018] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0019] (2) Alkali pile: prepare a caustic soda treatment solution with a concentration of 90-110g / l, and roll and pile the interwoven fabric at room temperature for 12-24 hours;

[0020] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0021] (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 180-190℃, and the pre-setting time is 45-60s;

[0022] (5) Enzyme dehairing: prepare the treatment liquid, select acid enzyme, the amount of acid enzyme is 3-6o.wf%, add acetic acid to adjust the pH value of the treatment liquid to 5.5-6, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, the temperature is 50-60℃, and the treatment time is 30-60min;

[0023] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0024] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0025] (8) Shaping and finishing: Use a shaping machine for shaping and finishing.

[0026] In the dyeing and finishing process of the above-mentioned nylon / hemp / lyocell interwoven fabric, in the step (2), the concentration of the caustic soda treatment solution is 100 g / l, and the interwoven fabric is rolled and stacked for 18 hours at room temperature.

[0027] In the dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric, in the step (4), the pre-setting temperature is 185° C. and the pre-setting time is 52 s;

[0028] In the dyeing and finishing process of the above-mentioned nylon / hemp / lyocell interwoven fabric, in the step (5), the amount of acidic enzyme used is 50.wf%, the pH value of the treatment liquid is 5.8, the interwoven fabric is placed in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, the temperature is 55°C, and the treatment time is 45 minutes.

[0029] In the dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric, after the interwoven fabric is refined in step (3), the interwoven fabric is subjected to a hair etching treatment using a polishing enzyme.

[0030] The advantages of the nylon / hemp / lyocell interwoven fabric and the dyeing and finishing process thereof of the present invention are as follows: according to the characteristics of common nylon-cotton products in the market, the present invention replaces cotton yarn with hemp / lyocell yarn and nylon filament, and uses an interweaving process instead of blending. Since the hygroscopicity, strength, gloss and smoothness of hemp / lyocell yarn are better than those of cotton, and nylon filament is used to alternately beat the yarn with it. The overall glossiness and strength of the fabric are greatly improved compared with the nylon-cotton fabric. Moreover, the hemp tencel yarn has a natural uneven style that cotton yarn does not have, which makes the overall style of the fabric surface of the present invention more natural. The design of this fabric not only pursues comfort and functionality, but also attaches importance to its environmental protection and durability. According to the respective characteristics of nylon and hemp / lyocell fibers, the common blending is abandoned and the interweaving method of pure nylon and hemp tencel is selected, so that the advantages of each fiber are fully displayed in the fabric, and the problems caused by the yarn when nylon is blended with cellulose such as hemp and cotton are effectively avoided, and the fabric strength and pilling effect are significantly improved. It can effectively avoid various problems caused by the blending of nylon with cellulose such as linen and cotton, and at the same time avoid the influence of interwoven fabrics on fiber strength and other aspects during the dyeing and finishing process. It makes the interwoven fabrics have the advantages of various fibers, comfort, functionality, and environmental protection, while taking into account the basic requirements of fabrics such as the best mechanical properties, wear resistance, color yield, shrinkage, smoothness, etc., which greatly improves the wearing performance of interwoven fabrics and is suitable for industrial mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the organizational structure of the interwoven fabric of Example 1 of the present invention;

[0032] Figure 2 This is a schematic diagram of the organizational structure of the interwoven fabrics of Examples 2 and 3 of the present invention;

[0033] Figure 3 This is a schematic diagram of the organizational structure of the interwoven fabric according to Example 4 of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the present invention, unless otherwise stated, directional words such as "upper" and "lower" generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the attached drawings; while "inside" and "outside" refer to the outline of the device. In addition, in the description of this application, the term "including" means "including but not limited to". The terms first, second, third, etc. are used only as labels and do not impose numerical requirements or establish an order. The term "plurality" means "two or more".

[0036] like Figure 1-2As shown, a nylon / hemp / lyocell interwoven fabric is shown, wherein the fabric is made of nylon fiber as warp yarn, nylon fiber as first weft yarn, hemp / lyocell blended yarn as second weft yarn, and the first weft yarn and the second weft yarn are interwoven alternately in a certain proportion, the weight proportion of hemp fiber in the hemp / lyocell blended yarn is 30-55%, the weight proportion of lyocell fiber is 45-70%, the content of hemp fiber in the interwoven fabric is 13-26%, the content of lyocell fiber is 20-29%, and the content of nylon fiber is 54-58%.

[0037] The first weft yarn and the second weft yarn are alternately beat up in a ratio of 1:1-2, and the count of the hemp / lyocell blended yarn is 11-21s. The F number of the nylon fiber is in the range of 48, the strength is ≥4.5cN / dtex, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the CV% of the yarn is in the range of 15-25%. The interwoven fabric can be woven by plain, twill, satin and jacquard weaving methods, and can be woven using a quiver, air jet or water jet loom.

[0038] like Figure 3 As shown, a nylon / hemp / lyocell interwoven fabric has a double-layer structure formed by alternately beating and interweaving the first weft yarn and the second weft yarn with spandex core-spun yarn as the warp yarn and the first weft yarn and the second weft yarn in a ratio of 2:1. The weight proportion of hemp fiber in the hemp / lyocell blended yarn is 55%, and the weight proportion of lyocell fiber is 45%. The interwoven fabric has a hemp fiber content of 15%, a lyocell fiber content of 13%, a nylon fiber content of 66%, and a spandex content of 6%.

[0039] Among them, the spandex core-spun yarn is prepared with spandex filament as the core yarn and nylon filament as the outer wrapping yarn, the drafting multiple ranges from 2.0 to 7.5, the hemp fiber splitting degree is ≥3000N, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the yarn CV% ranges from 15 to 25%.

[0040] The dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric of the present invention comprises the following steps:

[0041] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0042] (2) Alkali pile: prepare a caustic soda treatment solution with a concentration of 90-110g / l, and roll and pile the interwoven fabric at room temperature for 12-24 hours;

[0043] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0044] (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 180-190℃, and the pre-setting time is 45-60s;

[0045] (5) Enzyme dehairing: Prepare the treatment solution, select acid enzyme with activity of 20000, the dosage of acid enzyme is 3-6o.wf%, add acetic acid to adjust the pH value of the treatment solution to 5.5-6, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, the temperature is 50-60℃, and the treatment time is 30-60min;

[0046] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0047] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0048] (8) Shaping and finishing: Use a shaping machine for shaping and finishing.

[0049] According to many experiments, in order to improve the coloring ability of hemp fiber and increase its permeability, an additional alkali pile is added after cold stacking, using caustic soda with a concentration of 90-110g / l, and the hemp fiber is rolled and stacked at room temperature for 12-24 hours. The caustic soda can react and hydrolyze the lignin in the hemp fiber, and can also fully swell the cellulose components of the hemp fiber and lyocell, so that its permeability is significantly improved, thereby achieving the effect of improving the color yield of hemp / lyocell yarn. And after refining, in order to make the cloth surface smooth, the polishing enzyme etching treatment is added. It not only ensures the overall strength of the fabric, but also takes into account the overall style of the fabric color.

[0050] The present application is described in detail below through specific embodiments. The following embodiments are only partial embodiments of the present application and are not limitations of the present application.

[0051] Example 1

[0052] like Figure 1 As shown, a nylon / hemp / lyocell interwoven fabric, the fabric is composed of nylon fiber 1 as the warp yarn, nylon fiber 1 as the first weft yarn, hemp / lyocell blended yarn 2 as the second weft yarn, the first weft yarn and the second weft yarn are alternately wefted and interwoven in a ratio of 1:1 to form a plain weave structure, wherein the count of the hemp / lyocell blended yarn 2 is 11s. The weight proportion of hemp fiber in the hemp / lyocell blended yarn 2 is 55%, the weight proportion of lyocell fiber is 45%, the content of hemp fiber in the interwoven fabric is 26%, the content of lyocell fiber is 20%, and the content of nylon fiber is 54%. The F number range of nylon fiber 1 is 48, the strength is ≥4.5cN / dtex, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the CV% range of the yarn is 25%.

[0053] In this embodiment, nylon fiber 1 uses 70D nylon FDY filament as warp yarn, and 160D nylon ATY and 11s hemp tencel blended yarn are alternately beaten in a ratio of 1:1. The warp and weft interweaving method is adopted, and the weaving structure is referred to Figure 1 , weaving is done using an air jet loom with a loom speed of 380r / min.

[0054] The dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric in this embodiment includes the following steps:

[0055] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0056] (2) Alkali pile: Prepare a caustic soda treatment solution with a concentration of 90g / l, and roll and pile the interwoven fabrics at room temperature for 24 hours; the caustic soda can react and hydrolyze the lignin in the hemp fiber, and can also fully swell the cellulose components of the hemp fiber and lyocell, thereby significantly improving their permeability, thereby achieving the effect of improving the color yield of hemp / lyocell yarn.

[0057] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0058] (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 180℃, and the pre-setting time is 45s. Due to the characteristics of nylon filaments, the fabric needs to be pre-set before dyeing to control the shrinkage of the fabric during dyeing and ensure the style of the fabric. Fully release the internal stress of nylon filaments during spinning to avoid dead folds and streaks caused by stress during the dyeing and finishing stage.

[0059] (5) Enzyme dehairing: Prepare the treatment liquid, select acid enzyme, the amount of acid enzyme is 30.wf%, add acetic acid to adjust the pH value of the treatment liquid to 5.5, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, and the treatment time is 30 minutes at a temperature of 50℃; because the hemp lyocell yarn has more hairiness, there will be hairiness floating on the surface of the fabric during weaving. In order to obtain a smooth surface effect and facilitate the implementation of the post-processing process, the fabric needs to be dehaired by enzyme. The principle is that the enzyme is specific to cellulose. While removing the surface cellulose hairiness, it will not affect the nylon. That is, the smoothness of the fabric is improved and the strength of the fabric is guaranteed.

[0060] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0061] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0062] (8) Shaping and finishing: Use a shaping machine for shaping and finishing. In order to ensure the width and dry the fabric, this process can be carried out simultaneously with special finishing such as waterproof finishing and antistatic finishing.

[0063] Example 2

[0064] like Figure 2 As shown, a nylon / hemp / lyocell interwoven fabric, the fabric is composed of nylon fiber 1 as the warp yarn, nylon fiber 1 as the first weft yarn, hemp / lyocell blended yarn 2 as the second weft yarn, the first weft yarn and the second weft yarn are alternately wefted and interwoven in a ratio of 1:2 to form a plain weave structure, wherein the count of the hemp / lyocell blended yarn 2 is 21s. The weight proportion of hemp fiber in the hemp / lyocell blended yarn 2 is 30%, the weight proportion of lyocell fiber is 70%, the content of hemp fiber in the interwoven fabric is 13%, the content of lyocell fiber is 29%, and the content of nylon fiber is 58%. The F number range of nylon fiber 1 is 48, the strength is ≥4.5cN / dtex, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the CV% range of the yarn is 20%.

[0065] In this embodiment, nylon fiber 1 uses 70D nylon FDY filament as warp yarn, and 250D nylon ATY and 21s hemp tencel blended yarn are alternately beaten in a ratio of 1:2. The warp and weft interweaving method is adopted, and the weaving structure is referred to Figure 2 , weaving is done using an air jet loom with a loom speed of 450r / min.

[0066] The dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric in this embodiment includes the following steps:

[0067] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0068] (2) Alkali pile: Prepare a caustic soda treatment solution with a concentration of 100g / l, and roll and pile the interwoven fabrics at room temperature for 18 hours; the caustic soda can react and hydrolyze the lignin in the hemp fiber, and can also fully swell the cellulose components of the hemp fiber and lyocell, thereby significantly improving their permeability, thereby achieving the effect of improving the color yield of hemp / lyocell yarn.

[0069] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0070] (4) Pre-setting: The fabric is pre-set using a setting machine, with a setting temperature of 185°C and a setting time of 52 seconds. Due to the characteristics of nylon filaments, the fabric needs to be pre-set before dyeing to control the shrinkage of the fabric during dyeing and ensure the style of the fabric. The internal stress of the nylon filament during spinning is fully released to avoid dead folds and streaks caused by stress during the dyeing and finishing stage.

[0071] (5) Enzyme dehairing: Prepare the treatment liquid, select acid enzyme, the amount of acid enzyme is 50.wf%, add acetic acid to adjust the pH value of the treatment liquid to 5.8, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, and the treatment time is 45 minutes at a temperature of 55℃; because the hemp lyocell yarn has more hairiness, there will be hairiness floating on the surface of the fabric during weaving. In order to obtain a smooth surface effect and facilitate the implementation of the post-processing process, the fabric needs to be dehaired by enzyme. The principle is that the enzyme is specific to cellulose. While removing the surface cellulose hairiness, it will not affect the nylon. That is, the smoothness of the fabric is improved and the strength of the fabric is guaranteed.

[0072] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0073] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0074] (8) Shaping and finishing: Use a shaping machine for shaping and finishing. In order to ensure the width and dry the fabric, this process can be carried out simultaneously with special finishing such as waterproof finishing and antistatic finishing.

[0075] Example 3

[0076] like Figure 2 As shown, a nylon / hemp / lyocell interwoven fabric, the fabric is composed of nylon fiber 1 as the warp yarn, nylon fiber 1 as the first weft yarn, hemp / lyocell blended yarn 2 as the second weft yarn, the first weft yarn and the second weft yarn are alternately wefted and interwoven in a ratio of 1:2 to form a plain weave structure, wherein the count of the hemp / lyocell blended yarn 2 is 16s. The weight proportion of hemp fiber in the hemp / lyocell blended yarn 2 is 40%, the weight proportion of lyocell fiber is 60%, the content of hemp fiber in the interwoven fabric is 19%, the content of lyocell fiber is 24%, and the content of nylon fiber is 57%. The F number range of nylon fiber 1 is 48, the strength is ≥4.5cN / dtex, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the CV% range of the yarn is 20%.

[0077] In this embodiment, nylon fiber 1 uses 70D nylon FDY filament as warp yarn, and 250D nylon ATY and 16s hemp tencel blended yarn are alternately beaten in a ratio of 1:2. The warp and weft interweaving method is adopted, and the weaving structure is referred to Figure 2 , weaving is done using an air jet loom with a loom speed of 450r / min.

[0078] The dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric in this embodiment includes the following steps:

[0079] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0080] (2) Alkali pile: Prepare a caustic soda treatment solution with a concentration of 110g / l, and roll and pile the interwoven fabrics at room temperature for 12 hours; the caustic soda can react and hydrolyze the lignin in the hemp fiber, and can also fully swell the cellulose components of the hemp fiber and lyocell, thereby significantly improving their permeability, thereby achieving the effect of improving the color yield of hemp / lyocell yarn.

[0081] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0082] (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 190℃, and the pre-setting time is 60s. Due to the characteristics of nylon filaments, the fabric needs to be pre-set before dyeing to control the shrinkage of the fabric during dyeing and ensure the style of the fabric. Fully release the internal stress of nylon filaments during spinning to avoid dead folds and streaks caused by stress during the dyeing and finishing stage.

[0083] (5) Enzyme dehairing: Prepare the treatment liquid, select acid enzyme, the amount of acid enzyme is 60.wf%, add acetic acid to adjust the pH value of the treatment liquid to 6, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, and the treatment time is 60 minutes at a temperature of 60℃; because the hemp lyocell yarn has more hairiness, there will be hairiness floating on the surface of the fabric during weaving. In order to obtain a smooth surface effect and facilitate the implementation of the post-processing process, the fabric needs to be dehaired by enzyme. The principle is that the enzyme is specific to cellulose. While removing the surface cellulose hairiness, it will not affect the nylon. That is, the smoothness of the fabric is improved and the strength of the fabric is guaranteed.

[0084] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0085] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0086] (8) Shaping and finishing: Use a shaping machine for shaping and finishing. In order to ensure the width and dry the fabric, this process can be carried out simultaneously with special finishing such as waterproof finishing and antistatic finishing.

[0087] Example 4

[0088] like Figure 3As shown, a nylon / hemp / lyocell interwoven fabric, the fabric is composed of a spandex core-spun yarn 3 as a warp yarn, a spandex core-spun yarn 3 as a first weft yarn, a hemp / lyocell blended yarn 4 as a second weft yarn, and the first weft yarn and the second weft yarn are alternately interwoven in a ratio of 2:1 to form a double-layer structure four-way stretch fabric, wherein the count of the hemp / lyocell blended yarn 4 is 21s. The weight proportion of hemp fiber in the hemp / lyocell blended yarn 4 is 55%, the weight proportion of lyocell fiber is 45%, the content of hemp fiber in the interwoven fabric is 15%, the content of lyocell fiber is 13%, the content of nylon fiber is 66%, and the content of spandex is 6%.

[0089] In this embodiment, the spandex core-spun yarn 3 is prepared with spandex filaments as core yarn and nylon filaments as outer wrapping yarn, the drafting multiple range is 2.0-7.5, the hemp fiber splitting degree is ≥3000N, the breaking strength of the hemp / lyocell blended yarn is ≥250cN, and the yarn CV% range is 20%.

[0090] The interwoven fabric is a jacquard double-layer structure. The spandex core-spun yarn 3 uses 70D / 48F+40D spandex nylon matte DTY spandex covered yarn. The interwoven fabric is a jacquard double-layer structure. The 70D nylon elastic covered yarn is the warp yarn. The 70D nylon elastic covered yarn and the 21s hemp / lyocell blended yarn 4 are alternately beaten in a ratio of 2:1. The front style of the fabric is nylon, and the back style is hemp / lyocell. The warp and weft interweaving method is adopted, and the weaving structure refers to Figure 3 , weaving is done using an air jet loom with a loom speed of 350r / min.

[0091] The dyeing and finishing process of the nylon / hemp / lyocell interwoven fabric in this embodiment includes the following steps:

[0092] (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber;

[0093] (2) Alkali pile: Prepare a caustic soda treatment solution with a concentration of 100g / l, and roll and pile the interwoven fabrics at room temperature for 24 hours; the caustic soda can react and hydrolyze the lignin in the hemp fiber, and can also fully swell the cellulose components of the hemp fiber and lyocell, so that their permeability is significantly improved. Under the same conditions of dye type, dosage and dyeing process, the color yield of hemp / lyocell yarn can be effectively improved.

[0094] (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing;

[0095] (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 190℃, and the pre-setting time is 60s. Due to the characteristics of nylon filaments, the fabric needs to be pre-set before dyeing to control the shrinkage of the fabric during dyeing and ensure the style of the fabric. Fully release the internal stress of nylon filaments during spinning to avoid dead folds and streaks caused by stress during the dyeing and finishing stage.

[0096] (5) Enzyme dehairing: Prepare the treatment solution, select acid enzyme, the amount of acid enzyme is 50.wf%, add acetic acid to adjust the pH value of the treatment solution to 6, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, and the treatment time is 30 minutes at a temperature of 55°C; because the hemp lyocell yarn has more hairiness, there will be hairiness floating on the surface of the fabric during weaving. In order to obtain a smooth surface effect and facilitate the implementation of the post-processing process, the fabric needs to be dehaired by enzyme. The principle is that the enzyme is specific to cellulose. While removing the surface cellulose hairiness, it will not affect the nylon. That is, the smoothness of the fabric is improved and the strength of the fabric is guaranteed.

[0097] (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber;

[0098] (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics;

[0099] (8) Shaping and finishing: Use a shaping machine for shaping and finishing. In order to ensure the width and dry the fabric, this process can be carried out simultaneously with special finishing such as waterproof finishing and antistatic finishing.

[0100] The performance test results of the interwoven fabrics prepared in Examples 1-4 of the present invention are as follows:

[0101]

[0102] From the data analysis in the table, it can be seen that the fabric strength, wear resistance, anti-pilling grade and water washing shrinkage of the present invention are better than the reference standard, and the water washing shrinkage is stable, which fully meets the application in various daily environments. In summary, the present invention fully displays the advantages of each fiber in the interwoven fabric through the reasonable matching of the three fibers and the dyeing and finishing process adapted thereto, effectively avoiding various problems caused by the yarn when nylon is blended with cellulose such as linen and cotton, and at the same time avoiding the interwoven fabric from affecting the fiber strength and other aspects during the dyeing and finishing process, so that the interwoven fabric can combine the advantages of various fibers, have comfort, functionality, and environmental protection, and at the same time take into account the basic requirements of the fabric such as the best mechanical properties, wear resistance, color yield, shrinkage, and smoothness.

[0103] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A nylon / hemp / lyocell interwoven fabric, characterized in that: The fabric is made of nylon fiber as warp yarn, nylon fiber as first weft yarn, hemp / lyocell blended yarn as second weft yarn, and the first weft yarn and the second weft yarn are alternately wefted and interwoven in a certain proportion. The weight proportion of hemp fiber in the hemp / lyocell blended yarn is 30-55%, and the weight proportion of lyocell fiber is 45-70%. The content of hemp fiber in the interwoven fabric is 13-26%, the content of lyocell fiber is 20-29%, and the content of nylon fiber is 54-58%.

2. The nylon / hemp / lyocell interwoven fabric according to claim 1, characterized in that: The alternating weft ratio between the first weft yarn and the second weft yarn is 1:1-2, and the count of the hemp / lyocell blended yarn is 11-21s.

3. The nylon / hemp / lyocell interwoven fabric according to claim 1, characterized in that: The F number of the nylon fiber is in the range of 48, and the strength is ≥4.5 cN / dtex. The breaking strength of the hemp / lyocell blended yarn is ≥250 cN, and the CV% of the yarn is in the range of 15-25%.

4. A nylon / hemp / lyocell interwoven fabric, characterized in that: The fabric has a double-layer structure formed by spandex core-spun yarn as warp yarn, spandex core-spun yarn as first weft yarn, hemp / lyocell blended yarn as second weft yarn, and the first weft yarn and the second weft yarn are alternately wefted and interwoven in a ratio of 2:

1. The weight proportion of hemp fiber in the hemp / lyocell blended yarn is 55%, and the weight proportion of lyocell fiber is 45%. The content of hemp fiber in the interwoven fabric is 15%, the content of lyocell fiber is 13%, the content of nylon fiber is 66%, and the content of spandex is 6%.

5. The nylon / hemp / lyocell interwoven fabric according to claim 4 is characterized in that: The spandex core-spun yarn is prepared with spandex filaments as core yarns and nylon filaments as outer wrapping yarns, with a draft multiple ranging from 2.0 to 7.5, a hemp fiber splitting degree ≥3000N, a hemp / lyocell blended yarn breaking strength ≥250cN, and a yarn evenness CV% ranging from 15 to 25%.

6. A dyeing and finishing process for nylon / hemp / lyocell interwoven fabric according to any one of claims 1 to 5, characterized in that: The steps include: (1) Cold stacking: remove the oil added during chemical fiber spinning, remove the slurry and wax of hemp / lyocell blended yarn, and improve the feel of nylon fiber; (2) Alkali pile: prepare a caustic soda treatment solution with a concentration of 90-110g / l, and roll and pile the interwoven fabric at room temperature for 12-24 hours; (3) Refining: removing impurities and stains from the surface of interwoven fabrics to prepare for dyeing; (4) Pre-setting: Use a setting machine to pre-set the fabric, the pre-setting temperature is 180-190℃, and the pre-setting time is 45-60s; (5) Enzyme dehairing: prepare the treatment liquid, select acid enzyme, the amount of acid enzyme is 3-6o.wf%, add acetic acid to adjust the pH value of the treatment liquid to 5.5-6, place the interwoven fabric in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, the temperature is 50-60℃, and the treatment time is 30-60min; (6) Dyeing: The interwoven fabric is dyed using a two-bath two-step method of neutral-reactive dyeing, firstly reactive dyeing the hemp / lyocell blended yarn and then dyeing the nylon fiber; (7) Washing: Thoroughly wash away undyed dyes and floating colors on the surface of interwoven fabrics; (8) Shaping and finishing: Use a shaping machine for shaping and finishing.

7. The dyeing and finishing process of nylon / hemp / lyocell interwoven fabric according to claim 6 is characterized by: In the step (2), the concentration of the caustic soda treatment solution is 100 g / l, and the interwoven fabric is rolled and stacked for 18 hours at room temperature.

8. The dyeing and finishing process of nylon / hemp / lyocell interwoven fabric according to claim 6, characterized in that: In the step (4), the predetermined forming temperature is 185° C. and the predetermined forming time is 52 seconds.

9. The dyeing and finishing process of nylon / hemp / lyocell interwoven fabric according to claim 6, characterized in that: In the step (5), the amount of acid enzyme is 50.wf%, the pH value of the treatment solution is 5.8, the interwoven fabric is placed in an overflow cylinder or an air flow cylinder, the bath ratio is 1:15, the temperature is 55°C, and the treatment time is 45 minutes.

10. The dyeing and finishing process of nylon / hemp / lyocell interwoven fabric according to claim 6, characterized in that: After the interwoven fabric is refined in step (3), the interwoven fabric is subjected to a hair etching treatment using a polishing enzyme.

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