WO2021208209A1

WO2021208209A1 - Method for producing pure fibrilia fabric and pure fibrilia fabric produced by means of said method

Info

Publication number: WO2021208209A1
Application number: PCT/CN2020/093949
Authority: WO
Inventors: 奇普里亚尼·斯特凡诺
Original assignee: 斯特凡诺·奇普里亚尼工作室; 东嘉麻棉(常州)有限公司
Priority date: 2020-04-14
Filing date: 2020-06-02
Publication date: 2021-10-21
Also published as: CN115720600A; CN113529235A

Abstract

Disclosed are a method for producing a pure fibrilia fabric and a pure fibrilia fabric produced by means of the method. The method for producing a pure fibrilia fabric comprises: preparing a long fibrilia; preparing an alkali-soluble fiber; spinning the long fibrilia mixed with the alkali-soluble fiber into a yarn by means of wet spinning; weaving or knitting the yarn into a fabric; and dissolving the alkali-soluble fiber in the fabric with an alkali solution to remove the alkali-soluble fiber from the fabric, so as to obtain the pure fibrilia fabric. By means of the method for producing a pure fibrilia fabric, a pure fibrilia fabric with a yarn count of up to 70 metric single strands can be produced at an industrial grade yield and quality, which minimizes possible environmental pollution caused by production, and also facilitates the dyeing process after dissolution and can improve the dyeing performance of the fabric. The pure fibrilia fabric produced has a soft and light texture, and has excellent air permeability and moisture absorption, and an outstanding dyeing performance.

Description

Production method of pure hemp fiber fabric and pure hemp fiber fabric produced by the method

Cross-references to related applications

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China on April 14, 2020, with the application number 202010290485.8, titled "The production method of pure hemp fiber fabric and the pure hemp fiber fabric produced by this method" , Its entire content is incorporated into this application by reference.

Technical field

This application relates to the field of textiles, in particular to the production method of pure hemp fiber fabric and the pure hemp fiber fabric produced by the method.

Background technique

Hemp fiber generally refers to the fiber taken from hemp plants, among which flax, hemp, jute, ramie, apocynum and other fibers are widely used in weaving. For example, hemp fiber textiles made of flax and hemp fibers have attracted much attention because of their comfort and other advantages.

The characteristics of the hemp fiber itself makes the pure hemp fiber fabric harder and not light enough, and because of the poor fineness and irregularity of the hemp fiber, at present, especially in the case of wet spinning, it is still unable to achieve industrial-grade output and quality. The production of pure hemp fiber fabrics with yarn counts higher than 70 metric single-strands.

Summary of the invention

According to one aspect of the present application, a method for producing a pure hemp fiber fabric is provided. The method for producing the pure hemp fiber fabric may include: preparing long hemp fibers; preparing alkali soluble fibers; and mixing the long hemp fibers with alkali soluble fibers. The yarn is spun into a yarn by wet spinning; the yarn is woven or knitted into a fabric; and the alkali-soluble fiber in the fabric is dissolved with an alkali solution to remove the alkali-soluble fiber from the fabric, thereby obtaining a pure hemp fiber fabric.

Through the production method of pure hemp fiber fabric according to the present application, pure hemp fiber fabric with a yarn count of up to 70 metric single-strands can be produced with industrial-grade output and quality, which can minimize the pollution that may be caused by production to the environment. It can also be beneficial to the dyeing process performed after dissolution, and can improve the dyeing performance of the fabric; and the pure hemp fiber fabric produced by the method for producing the pure hemp fiber fabric of the present application is soft and lightweight, and has excellent air permeability and moisture absorption. It has excellent dyeing performance.

According to one embodiment of the present application, in the production method of pure hemp fiber fabric as described above, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, the long hemp fiber must be sent Wet it with water before entering the spinning system. Through the production method of the pure hemp fiber fabric according to this embodiment, the wet spinning technology can be effectively applied to the spinning process of the long hemp fiber and the excellent performance of the long hemp fiber can be fully utilized, thereby enabling the pure hemp fiber fabric to have all the advantages. The soft texture you need.

According to an embodiment of the present application, in the production method of pure hemp fiber fabric as described above, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, it can follow the spun yarn The thread count increases, increasing the twist of the yarn. Through the production method of pure hemp fiber fabric according to this embodiment, the spun yarn can be made to have the required high count and the appropriate high strength at the same time, the yarn is not easy to break during the weaving process, and the Failure rate The yarn is woven or woven into a fabric, so as to finally obtain an industrial-grade output and quality high-count pure hemp fiber fabric.

According to an embodiment of the present application, in the production method of pure hemp fiber fabric as described above, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, it can follow the spun yarn The proportion of long hemp fiber in the thread decreases, increasing the twist of the yarn. Through the production method of pure hemp fiber fabric according to this embodiment, the pure hemp fiber fabric after dissolving alkali-soluble fibers can be made soft and light, with high air permeability and moisture absorption, while still having suitable and sufficient strength. So as to finally obtain industrial-grade output and quality high-count pure hemp fiber fabric.

According to an embodiment of the present application, in the production method of pure hemp fiber fabric as described above, in the spun yarn, the volume percentage of the long hemp fiber may be more than 60%, and the volume percentage of the alkali-soluble fiber may be 40%. %the following. Through the production method of pure hemp fiber fabric according to this embodiment, a high count pure hemp fiber fabric of industrial grade output and quality can be finally obtained, and the obtained pure hemp fiber fabric is soft and light while having suitable It has sufficient strength, and also has excellent air permeability and moisture absorption.

According to an embodiment of the present application, in the production method of pure hemp fiber fabric as described above, in the spun yarn, the volume percentage of the long hemp fiber can be 85%-90%, and the volume percentage of the alkali-soluble fiber can be It is 10%-15%. Through the production method of pure hemp fiber fabric according to this embodiment, it is possible to finally obtain a high count pure hemp fiber fabric of industrial grade output and quality, and the obtained pure hemp fiber fabric is soft and light while having suitable Sufficient strength, but also has excellent air permeability and moisture absorption.

According to an embodiment of the present application, in the method for producing pure hemp fiber fabric as described above, in the spun yarn, the volume percentage of the long hemp fiber may be 60%, and the volume percentage of the alkali-soluble fiber may be 40%. . Through the production method of pure hemp fiber fabric according to this embodiment, a high count pure hemp fiber fabric of industrial grade output and quality can be finally obtained; and the obtained pure hemp fiber fabric is very soft and very light in texture, and can be It has suitable and sufficient strength, and also has excellent air permeability and hygroscopicity.

According to an embodiment of the present application, in the method for producing pure hemp fiber fabric as described above, the woven or knitted fabric can be placed in a NaOH solution with a Baumé degree of 36 for 24 hours to reduce the alkali solubility in the fabric. The fiber dissolves. Through the production method of the pure hemp fiber fabric according to this embodiment, the alkali-soluble fibers can be dissolved and removed from the fabric to the greatest extent, so as to finally obtain the high count pure hemp fiber fabric of industrial grade output and quality.

According to a preferred embodiment of the present application, in the production method of pure hemp fiber fabric as described above, the woven or knitted fabric can be woven or knitted with a NaOH solution with a concentration of 30-35g/L and a concentration of 5-10g/L. The scouring agent is scoured at 100-102°C for 60-80 minutes to dissolve the alkali-soluble fibers in the fabric. Through the production method of the pure hemp fiber fabric according to this embodiment, the alkali-soluble fibers can be completely dissolved and removed from the fabric in a more efficient manner, and finally a high count pure hemp fiber fabric with industrial-grade output and quality can be obtained.

According to an embodiment of the present application, in the method for producing pure hemp fiber fabric as described above, the length and diameter of the alkali-soluble fiber can be matched with the length and diameter of the long hemp fiber, so that the long hemp mixed with the alkali-soluble fiber Fiber can be spun into yarn by wet spinning. Through the production method of the pure hemp fiber fabric according to this embodiment, the long hemp fiber and the alkali-soluble fiber can be fully combined with each other in the wet spinning process, thereby spun into the required yarn, and finally obtain the industrial-grade output and High-quality pure hemp fiber fabric.

According to an embodiment of the present application, in the production method of pure hemp fiber fabric as described above, the diameter of the alkali-soluble fiber may be not less than 2 denier and/or the length may not be less than 88 mm. Through the production method of the pure hemp fiber fabric according to this embodiment, the long hemp fiber and the alkali-soluble fiber can be fully combined with each other in the wet spinning process, thereby spun into the required yarn, and finally obtain the industrial-grade output and High-quality pure hemp fiber fabric.

According to an embodiment of the present application, in the production method of the pure hemp fiber fabric as described above, the alkali-soluble fiber may be a polyester fiber. Because polyester fiber has good wrinkle resistance and shape retention, and has high strength and elastic recovery ability, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, it can make all the The spun yarn has the required high count and the appropriate high strength. The yarn is not easy to break during the weaving process. The yarn can be woven or woven into a fabric with a very low failure rate, so as to finally obtain an industrial grade High-count pure hemp fiber fabrics with yield and quality. In addition, through the production method of the pure hemp fiber fabric according to this embodiment, the alkali-soluble fibers can be dissolved and removed from the fabric, so as to finally obtain an industrial-grade high-count pure hemp fiber fabric with industrial-grade output and quality.

According to an embodiment of the present application, the method for producing the pure hemp fiber fabric as described above may further include: dyeing the obtained pure hemp fiber fabric. Through the production method of pure hemp fiber fabric according to this embodiment, it is possible to produce pure hemp fiber fabric with a yarn count of up to 70 metric single strands with industrial-grade output and quality, and it can also facilitate the dyeing process after dissolution. Improve the dyeing performance of the fabric; and the obtained pure hemp fiber fabric is soft and lightweight, has excellent air permeability and moisture absorption, and has outstanding dyeing performance.

According to an embodiment of the present application, in the method for producing a pure hemp fiber fabric as described above, the spinning system may be a ring spinning system. Through the production method of the pure hemp fiber fabric according to this embodiment, the wet spinning technology can be effectively applied to the spinning process of the long hemp fiber, and the excellent physical properties of the long hemp fiber can be fully utilized, so that the pure hemp fiber fabric has all the advantages. The soft texture you need.

According to another aspect of the present application, there is also provided a pure hemp fiber fabric, which can be made by the production method of the pure hemp fiber fabric as described above. The pure hemp fiber fabric according to the present application is soft and lightweight, has excellent air permeability and moisture absorption, and has outstanding dyeing properties.

According to an embodiment of the present application, the yarn count in the pure hemp fiber fabric may be more than 70 metric single strands. The pure hemp fiber fabric according to this embodiment is soft and lightweight, has excellent air permeability and moisture absorption, and has outstanding dyeing properties.

According to an embodiment of the present application, in the pure hemp fiber fabric as described above, the long hemp fiber is flax fiber or hemp fiber. The pure hemp fiber fabric according to this embodiment is soft and lightweight, has excellent air permeability and moisture absorption, and has outstanding dyeing properties.

Description of the drawings

The features, advantages, technical and industrial significance of the exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components or steps, and in the accompanying drawings middle:

Figure 1 shows a flow chart of a method for producing a pure hemp fiber fabric according to an embodiment of the present application;

2A shows a cross-sectional view of fabric yarn before dissolving alkali-soluble fiber in the method for producing pure hemp fiber fabric according to an embodiment of the present application;

2B shows a cross-sectional view of a fabric yarn after dissolving alkali-soluble fibers in the method for producing a pure hemp fiber fabric according to an embodiment of the present application;

Fig. 3 shows a flow chart of a method for producing a pure hemp fiber fabric according to an embodiment of the present application;

Fig. 4 shows a flow chart of a method for producing a pure hemp fiber fabric according to an embodiment of the present application; and

Fig. 5 shows a production method of a pure hemp fiber fabric according to a preferred embodiment of the present application.

Detailed ways

Hereinafter, with reference to the drawings of the specification, the production method of the pure hemp fiber fabric provided in the present application and the pure hemp fiber fabric produced by the production method will be described.

Fig. 1 shows a production method of a pure hemp fiber fabric according to an embodiment of the present application. As shown in Figure 1, the production method 10 of pure hemp fiber fabric includes the following steps: S100, preparing long hemp fiber; S200, preparing alkali soluble fiber; S300, spinning the long hemp fiber mixed with alkali soluble fiber by wet spinning Yarn; S400, weave or knit the yarn into a fabric; S500, dissolve the alkali-soluble fiber in the fabric with an alkali solution to remove the alkali-soluble fiber from the fabric, thereby obtaining a pure hemp fiber fabric.

The pure hemp fiber fabric obtained by the production method of the pure hemp fiber fabric has a special yarn structure. After the alkali-soluble fibers in the fabric are dissolved, only the long hemp fibers are present in the yarn structure of the fabric, and gaps are left between the long hemp fibers at the positions occupied by the alkali-soluble fibers before the alkali-soluble fibers are dissolved. 2A shows a cross-sectional view of the fabric yarn before dissolving alkali-soluble fibers in the production method of the pure hemp fiber fabric according to the embodiment of the application, and FIG. 2B shows the dissolution in the production method of the pure hemp fiber fabric according to the embodiment of the application Cross-sectional view of the fabric yarn after alkali-soluble fiber. By comparing the two images, it can be seen that there are voids in the fabric yarn after dissolving alkali-soluble fiber. The volume percentage of alkali-soluble fiber in the spun yarn The larger the size, the more voids left after the alkali-soluble fiber is dissolved. It is this hollow yarn structure that makes the pure hemp fiber fabric obtained by the production method of the pure hemp fiber fabric according to the present application soft and light, with excellent air permeability and moisture absorption, and outstanding dyeing performance. In addition, this kind of fabric has a special yarn structure, its yarns can also have a higher count, making the fabric texture softer.

In the production method of pure hemp fiber fabric according to the present application, long hemp fiber refers to a long hemp fiber made from carded long hemp obtained after combing into hemp, as opposed to short hemp fiber. Hemp fiber, short hemp fiber is made based on the noil produced in the combing process, namely short hemp.

The long hemp fiber can be prepared in a suitable manner in the prior art for use in the subsequent steps of the production method of the pure hemp fiber fabric according to the present application. Take flax as an example. For example, in an embodiment of this application, a comb comber can be used to comb the pre-processed flax, and the long combed flax can be combed out, and the obtained combed flax has a longer length. It is long, relatively neat, and high in strength. As one of the two basic materials for producing pure hemp fiber fabric by the production method of pure hemp fiber fabric according to the present application, it can be produced by the production method of pure hemp fiber fabric of the present application. It is an important guarantee for a pure hemp fiber fabric with soft texture and light weight, excellent air permeability and moisture absorption.

As another basic material for the production method of the pure hemp fiber fabric of the present application, alkali-soluble fiber refers to a fiber that is easily soluble in alkali water, that is, a fiber with sufficient alkali water solubility, which can be fully dissolved in an alkali solution under specific conditions. Dissolve. In an embodiment of the present application, the alkali-soluble fiber may be a fiber made from a modified polyester copolymer that is easily soluble in alkaline water. The intrinsic viscosity of the polyester copolymer is 0.40～0.65dl/g, wherein The content of the compound is less than or equal to 100 ppm in terms of antimony atoms relative to the polyhydric.

Similarly, the alkali-soluble fiber can be prepared by an appropriate method in the prior art for use in the subsequent steps of the production method of the pure hemp fiber fabric according to the present application. In an embodiment of the present application, the alkali-soluble modified polyester copolymer can be prepared by the oxidization and polymerization reaction, for example, the alkali-soluble fiber can be made by a spinning machine.

The prepared alkali-soluble fiber should not only have sufficient alkali water solubility, but also have specific physical properties so that it can be fully combined with the long hemp fiber. In an embodiment according to the present application, the length and diameter of the prepared alkali-soluble fiber are matched with the length and diameter of the prepared long hemp fiber, respectively, so that the alkali-soluble fiber and the long hemp fiber can be uniformly mixed and fully combined to make the mixing The long hemp fiber with alkali-soluble fiber can be spun into yarn by wet spinning.

In a preferred embodiment according to the present application, the diameter of the prepared alkali-soluble fiber is not less than 2 denier. In another preferred embodiment according to the present application, the length of the prepared alkali-soluble fiber is not less than 88 mm.

After the long hemp fiber and alkali soluble fiber are prepared according to the production method of pure hemp fiber fabric of the present application, the prepared long hemp fiber and alkali soluble fiber can be mixed, and the mixed long hemp fiber and alkali soluble fiber can be passed through wet French spinning spun into yarn. In this application, in order to make full use of the excellent characteristics of the long hemp fiber, the spinning method adopted for the mixed fiber is a wet spinning method suitable for the long hemp fiber, not a dry spinning method.

According to an embodiment of the present application, the prepared long hemp fiber and alkali-soluble fiber can be pre-combined on a card draw frame to obtain fiber slivers, and the pre-combined long hemp fiber and alkali-soluble fiber sliver can be combined in a specific ratio. The two kinds of fibers can be combined by merging on the draw frame, and multiple merging can be performed to make the long hemp fiber and the alkali-soluble fiber fully mixed. Then, the long hemp fiber mixed with the alkali-soluble fiber can be spun on a wet spinning machine for roving and fine yarn spinning to obtain a blended yarn containing the long hemp fiber and the alkali-soluble fiber. According to another embodiment of the present application, the blended yarn of long hemp fiber and alkali-soluble fiber can also be subjected to winding, warping, and sizing for subsequent steps.

According to an embodiment of the present application, before mixing the long hemp fiber and the alkali-soluble fiber, the long hemp fiber must be wetted with water to make full use of the excellent characteristics of the long hemp fiber.

According to an embodiment of the present application, the long hemp fiber mixed with alkali-soluble fibers can also be wetted with water before being fed into the wet spinning machine, so as to make full use of the excellent characteristics of the long hemp fiber.

According to an embodiment of the present application, when the long hemp fiber mixed with alkali-soluble fibers is spun on a wet spinning machine, the spinning system used may be a ring spinning system.

After obtaining the yarn of long hemp fiber mixed with alkali-soluble fiber through the above steps, the obtained yarn can be woven into a fabric in a suitable manner. In the production method of the pure hemp fiber fabric according to the embodiment of the present application, the weaving method used is weaving or knitting.

No matter what kind of weaving method is used, when the yarn is woven into a fabric, the yarn should have a certain strength, and for a given long hemp fiber and alkali-soluble fiber, the yarn twist can be increased during the spinning process. The spun yarn has the strength required for weaving. On the other hand, it is necessary to increase the count of spun yarns during spinning, so that the final fabric obtained has a higher count, which makes the texture of the fabric softer.

According to an embodiment of the present application, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, the twist of the yarn can be increased as the count of the spun yarn increases. In this way, the spun yarn can be made to have the required high count and adequate strength at the same time, the yarn is not easy to break during the weaving process, and the yarn can be woven or knitted into a fabric with minimal downtime. So as to finally obtain industrial-grade output and quality high-count pure hemp fiber fabric.

As mentioned above, according to the technical solution disclosed in this application, after the alkali-soluble fiber is dissolved, voids are left in the yarn of the fabric. In the spun yarn, the larger the volume percentage of the alkali-soluble fiber, that is, the long hemp fiber The smaller the volume percentage, the more voids left after the alkali-soluble fiber is dissolved. For a given yarn count, the final fabric obtained is softer and lighter.

According to an embodiment of the present application, when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, the volume percentage of the long hemp fiber in the spun yarn can be reduced, and the yarn can be increased. The twist. In this way, the pure hemp fiber fabric after dissolving the alkali-soluble fiber can be soft and light, with high air permeability and hygroscopicity, while still having adequate and sufficient strength, so it is not easy to break, so as to finally obtain industrial-grade output and High-quality pure hemp fiber fabric.

However, the proportion of long hemp fiber in the spun yarn is too low, and the final pure hemp fiber fabric itself may not have proper strength, and the quality of the pure hemp fiber fabric produced cannot be ensured. The inventor of the present application conducted a large number of experiments on the yarn count and twist on the different ratios of the long hemp fiber and the alkali-soluble fiber in the spun yarn, in order to determine the production method of the pure hemp fiber fabric according to the present application. The proper proportion of long hemp fiber and alkali-soluble fiber in the spun yarn can make the obtained pure hemp fiber fabric soft and light, with high air permeability and moisture absorption, while still having proper strength .

Table 1 shows the test results of the spun yarn used for knitting, and Table 2 shows the test results of the spun yarn used for knitting.

Table 1

Table 2

In Table 1 and Table 2, the standard of count is the metric standard (NM), the unit of twist is the number of twists per meter (TPM), "soluble fiber" is used to indicate alkali-soluble fiber, and "initial count" refers to It is the count of the spun yarn, and the "final count" refers to the count of the yarn of the fabric after the alkali-soluble fiber is dissolved.

According to an embodiment of the present application, in the spun yarn, the volume percentage of the long hemp fiber can account for more than 60%, and the volume percentage of the alkali-soluble fiber can account for less than 40%. In particular, according to a preferred embodiment of the present application, in the spun yarn, the long hemp fiber can account for 60%, and the alkali-soluble fiber can account for 40%. In this way, a high-count pure hemp fiber fabric with industrial-grade output and quality can be finally obtained, and the pure hemp fiber fabric obtained is soft and light, but also has suitable and sufficient strength, and also has excellent air permeability and moisture absorption. .

According to other embodiments of the present application, in the spun yarn, the long hemp fiber may account for 85%-90%, and the alkali-soluble fiber may account for 10%-15%. In this way, a high-count pure hemp fiber fabric with industrial-grade output and quality can be finally obtained, and the obtained pure hemp fiber fabric is soft and light, but also has suitable strength, and has excellent air permeability and moisture absorption.

After the woven fabric is obtained by weaving or knitting the spun yarn, the alkali-soluble fiber in the fabric can be dissolved with an alkali solution to remove the alkali-soluble fiber from the fabric, thereby obtaining a pure hemp fiber fabric. The alkali-soluble fiber is dissolved by the alkali solution, and the dissolved alkali solution is more environmentally friendly, and can minimize the pollution that may be caused by the production to the environment. In addition, if the fabric is dyed after dissolution, the dissolution of the alkali solution can also improve the dyeing performance of the fabric.

According to a preferred embodiment of the present application, the woven or knitted fabric can be placed in a NaOH solution with a Baumé degree of 36 for 24 hours to dissolve the alkali-soluble fibers in the fabric. In this way, the alkali-soluble fiber can be dissolved and removed to the greatest extent from the fabric, so as to finally obtain an industrial-grade output and quality high-count pure hemp fiber fabric.

According to a more preferred embodiment of the present application, the woven or knitted fabric can be woven or knitted with a NaOH solution with a concentration of 30g/L-35g/L and a refining agent with a concentration of 5g/L-10g/L in a range of 100-102 Scouring at ℃ for 60-80 minutes to dissolve the alkali-soluble fibers in the fabric. Through the production method of the pure hemp fiber fabric according to this embodiment, the alkali-soluble fibers can be completely dissolved and removed from the fabric more efficiently, so as to finally obtain an industrial-grade high-count pure hemp fiber fabric with industrial-grade output and quality.

According to one embodiment of the present application, after weaving the yarn into a fabric, the fabric can be desized and singed, and then the alkali-soluble fibers in the fabric can be dissolved with an alkali solution to remove the alkali-soluble fibers from the fabric, and then Wash with water.

Figure 3 shows the production method of pure hemp fiber fabric according to the above embodiment, which includes the following steps: S100, preparing long hemp fiber; S200, preparing alkali soluble fiber; S300, passing the long hemp fiber mixed with alkali soluble fiber Wet spinning spinning into yarn; S400, weaving or knitting the yarn into a fabric; S500, desizing the woven or knitted fabric; S600, singeing the woven or knitted fabric; S700 , Use an alkali solution to dissolve the alkali soluble fibers in the fabric to remove the alkali soluble fibers from the fabric; S800, wash the fabric after removing the alkali soluble fibers to obtain a pure hemp fiber fabric.

According to an embodiment of the present application, the obtained pure hemp fiber fabric can also be dyed. As mentioned above, the dissolution of the alkali solution can also improve the dyeing performance of the fabric, and the obtained pure hemp fiber fabric is soft and light, has excellent air permeability and moisture absorption, and has outstanding dyeing performance.

Fig. 4 shows the production method of pure hemp fiber fabric according to the above embodiment, which includes: S100, preparing long hemp fiber; S200, preparing alkali soluble fiber; S300, passing the long hemp fiber mixed with alkali soluble fiber through a wet method Spinning yarn into yarn; S400, weaving or knitting the yarn into a fabric; S500, dissolving the alkali-soluble fiber in the woven or knitted fabric with an alkali solution to woven or knitted the alkali-soluble fiber into a fabric The fabric is removed to obtain pure hemp fiber fabric; S600, the pure hemp fiber fabric is dyed; S700, the pure hemp fiber fabric is finished.

Figure 5 shows a method for producing pure hemp fiber fabric according to a preferred embodiment of the present application, which includes the following steps: S100, preparing long hemp fibers; S200, preparing alkali soluble fibers; S300, mixing long hemp fibers with alkali soluble fibers; Hemp fiber is spun into yarn by wet spinning; S400, the yarn is woven or knitted into a fabric; S500, the woven or knitted fabric is desizing; S600, the woven or knitted fabric is burned Wool; S700, the singeed fabric is simmered with a NaOH solution with a concentration of 30g/L-35g/L and a scouring agent with a concentration of 5g/L-10g/L at 100-102°C for 60-80 minutes, To remove the alkali-soluble fiber from the fabric to obtain a pure hemp fiber fabric; S800, use available chlorine with a concentration of 2.5g/L-3g/L to perform light chlorine bleaching on the pure hemp fiber fabric after removing the alkali-soluble fiber; S900, _{Use hydrogen peroxide (H 2} O ₂ ) with a concentration of 3g/L-3.5g/L to perform oxygen bleaching on the fabric after light chlorine bleaching; S1000, use a NaOH solution with a concentration of 140g/L-150g/L to perform oxygen bleaching on the fabric After mercerizing the fabric; S1100, dyeing the pure hemp fiber fabric after mercerizing.

Through the production method of pure hemp fiber fabric according to the present application, pure hemp fiber fabric with a yarn count of up to 70 metric single-strands can be produced with industrial-grade output and quality, which can minimize the pollution that may be caused by production to the environment. It can also facilitate the dyeing process after dissolution, and can improve the dyeing performance of the fabric.

As mentioned above, the pure hemp fiber fabric produced by the production method of the pure hemp fiber fabric of the present application is soft and light, has excellent air permeability and moisture absorption, and has outstanding dyeing properties.

According to an embodiment of the present application, the yarn count of the pure hemp fiber fabric produced by the pure hemp fiber fabric production method of the present application can reach 70 metric single strands and above. This pure hemp fiber fabric has such a high count and extremely soft texture.

According to an embodiment of the present application, the long hemp fiber in the pure hemp fiber fabric produced by the pure hemp fiber fabric production method of the present application is flax fiber or hemp fiber. Of course, the long hemp fiber in the pure hemp fiber fabric can also be other hemp fibers. This pure hemp fiber fabric has excellent air permeability and moisture absorption.

The terms "a", "an" and "the", "said" and similar references used in the context of describing the disclosed embodiments (especially in the context of the appended claims) shall be construed as covering Singular and plural, unless otherwise stated herein or clearly contradictory to the context. Unless otherwise stated, the terms "including", "having", "including" and "containing" shall be interpreted as open-ended terms, that is, meaning "including but not limited to". Unless otherwise indicated herein, the enumeration of numerical ranges herein is only intended to be used as a simplified method to refer to each individual value falling within the range separately, and each individual value is included in the specification as if it were It is described separately in this article. Unless otherwise indicated herein or clearly contradictory to the context, all methods described herein can be performed in any suitable order. Unless otherwise required, the use of any and all examples or exemplary language (e.g., "such as") provided herein is only intended to better clarify the embodiments of the present disclosure, and does not limit the scope of the present disclosure. Any language in the specification should not be construed as indicating that any unclaimed element is indispensable for implementing the present disclosure.

It should be understood that the implementations described in this application should only be considered in a descriptive sense, rather than for the purpose of limitation. Descriptions of features or aspects within each embodiment should generally be considered as available for other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, those of ordinary skill in the art will understand that various changes can be made in form and details without departing from the present disclosure as defined by the appended claims Spirit and scope.

Claims

A method for producing pure hemp fiber fabric, which is characterized in that it comprises:

Prepare long hemp fiber;

Prepare alkali-soluble fiber;

Spinning long hemp fiber mixed with alkali-soluble fiber into yarn by wet spinning;

Weaving or knitting the yarn into a fabric; and

The alkali-soluble fiber in the woven or knitted fabric is dissolved with an alkali solution to remove the alkali-soluble fiber from the woven or knitted fabric, thereby obtaining the pure hemp fiber fabric.
The method for producing pure hemp fiber fabric according to claim 1, wherein when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, the long hemp fiber is fed into the spinning yarn. Wet the system with water before.
The method for producing a pure hemp fiber fabric according to claim 1 or 2, wherein when the long hemp fiber mixed with alkali-soluble fibers is spun into yarn by wet spinning, the yarn counts according to the spun yarn. The number increases, increasing the twist of the yarn.
The method for producing pure hemp fiber fabric according to claim 3, wherein when the long hemp fiber mixed with alkali-soluble fiber is spun into yarn by wet spinning, the long hemp fiber in the spun yarn is The ratio decreases, increasing the twist of the yarn.
The method for producing pure hemp fiber fabric according to any one of claims 2-4, wherein, in the spun yarn, the volume percentage of the long hemp fiber is more than 60%, and the volume percentage of the alkali-soluble fiber is 40%. %the following.
The method for producing pure hemp fiber fabric according to any one of claims 2-4, wherein, in the spun yarn, the volume percentage of the long hemp fiber is 85%-90%, and the volume percentage of the alkali-soluble fiber It is 10%-15%.
The method for producing pure hemp fiber fabric according to any one of claims 2-4, wherein, in the spun yarn, the volume percentage of the long hemp fiber is 60%, and the volume percentage of the alkali-soluble fiber is 40%. .
The method for producing a pure hemp fiber fabric according to any one of claims 5-7, wherein the woven or knitted fabric is placed in a NaOH solution with a Baumé degree of 36 for 24 hours to remove the Alkali-soluble fibers in woven or knitted fabrics dissolve.
The method for producing a pure hemp fiber fabric according to any one of claims 5-7, wherein the woven or knitted fabric uses a NaOH solution with a concentration of 30-35g/L and a concentration of 5-10g /L of scouring agent is scoured at 100-102°C for 60-80 minutes to dissolve the alkali-soluble fibers in the woven or knitted fabric.
The method for producing a pure hemp fiber fabric according to any one of claims 5-9, wherein the length and diameter of the alkali-soluble fiber are matched with the length and diameter of the long hemp fiber, respectively, so that the mixture is The long hemp fiber of the alkali-soluble fiber can be spun into a yarn by wet spinning.
The method for producing a pure hemp fiber fabric according to claim 10, wherein the diameter of the alkali-soluble fiber is not less than 2 denier and/or the length is not less than 88 mm.
The method for producing pure hemp fiber fabric according to claim 11, wherein the alkali-soluble fiber is polyester fiber.
The method for producing a pure hemp fiber fabric according to any one of the preceding claims, further comprising: dyeing the obtained pure hemp fiber fabric.
The method for producing a pure hemp fiber fabric according to any one of claims 2-13, wherein the spinning system is a ring spinning system.
A pure hemp fiber fabric, characterized in that the pure hemp fiber fabric is made by the production method of the pure hemp fiber fabric according to any one of claims 1-14.
The pure hemp fiber fabric according to claim 15, wherein the yarn count in the pure hemp fiber fabric is more than 70 metric single strands.
The pure hemp fiber fabric according to claim 15 or 16, wherein the long hemp fiber is flax fiber or hemp fiber.