Method for producing natural fibers for textiles by biochemical co-processing

Abstract

The present invention belongs to the technical field of producing natural fibers for textiles, and discloses a method for producing natural fibers for textiles by a biochemical method involving an environmentally friendly method. The present invention can accurately measure the permeability of natural fiber fabrics by measuring the permeability of natural fiber fabrics. At the same time, the present invention can test the wetting properties of natural fiber samples by utilizing the shrinkage of organic silicone heat shrink tubing after heating to expel bubbles between natural fiber samples before baking. The size and number of surface defects of natural fiber sample rods can be observed to preliminarily judge the wetting properties. The method does not utilize the characteristics of a certain natural fiber sample and is therefore applicable to different natural fiber samples. The density test does not require any precision instruments, and the volume measurement error by displacement is small. Therefore, the present invention has the characteristics of low cost, accurate testing, intuitive test results, and a wide range of applications.

Description

Technical Field

[0001] The present invention belongs to the technical field of preparing natural fibers for textiles, and in particular relates to an environmentally friendly method for preparing natural fibers for textiles by a bio-chemical co-processing method. Background Art

[0002] Natural fibers are textile fibers obtained directly from plants or animals that occur naturally or through artificial cultivation. They are an important source of materials for the textile industry. Global production of natural fibers is substantial and continues to increase, making them a crucial source of materials for the textile industry. Despite the rapid growth in synthetic fiber production since the mid-20th century, natural fibers still account for approximately 50% of total annual textile fiber production. In addition to cotton and hemp, trees and grasses also produce large quantities of cellulose polymers in nature. However, the cellulose produced by trees and grasses does not exist in the form of long fibers and cannot be used directly as fibers. Chemical treatment of these natural cellulose polymers—without changing their chemical structure but only their physical structure—is used to produce cellulose fibers that can be used as fibers and have improved properties. This technology is called artificial fiber technology. Artificial fibers are a type of chemical fiber, while synthetic fibers are another type of chemical fiber. There is only one type of artificial fiber, viscose (also called rayon), which is chemically composed of cellulose polymers. However, existing methods involving environmentally friendly bio-chemical methods to produce natural fibers for textile use do not accurately measure the permeability of natural fiber fabrics; at the same time, they cannot accurately test the wetting properties of natural fiber samples.

[0003] Through the above analysis, the problems and defects of the existing technology are as follows:

[0004] (1) The existing environmentally friendly bio-chemical method for producing natural fibers for textiles does not accurately measure the permeability of natural fiber fabrics.

[0005] (2) It is not possible to accurately test the wetting properties of natural fiber samples. Summary of the Invention

[0006] In view of the problems existing in the prior art, the present invention provides an environmentally friendly method for preparing natural fibers for textiles by a bio-chemical co-processing method.

[0007] The present invention is achieved in that a method for preparing natural fibers for textiles by a biochemical co-processing method involving an environmentally friendly method comprises:

[0008] Step 1: The herb is air-dried, placed in a fermentation tank, and inoculated with anaerobic microorganisms to ferment, converting its organic components into combustible gases, mainly methane, and small molecules that dissolve in the fermentation liquid. The remaining cellulose and lignin remain in the fermentation liquid as residues.

[0009] The anaerobic microorganism cultivation method:

[0010] After the culture medium solution is prepared, methylene blue is added as a redox state indicator; at room temperature, a scavenger is added to the culture medium solution, shaken to dissolve, and the culture medium solution is immediately dispensed into culture bottles, which are then capped with rubber stoppers and bottle caps. The dispensing and capping operations should be controlled within 30 minutes.

[0011] Passing nitrogen through the rubber stopper with a syringe needle into the treated culture bottle, while exhausting the air at the same time to exchange the air above the solution in the culture bottle; sterilizing the treated culture bottle with high-temperature steam, cooling it, and setting it aside;

[0012] The culture medium solution is a liquid culture medium solution; the weight volume percentage of the methylene blue in the culture medium solution is 0.0006%;

[0013] The room temperature state refers to the room temperature being less than or equal to 37°C;

[0014] The oxygen scavenger is vitamin C and its sodium salt, isovitaminosis C and its sodium salt, cysteine ​​and its hydrochloride, or a complex of these substances;

[0015] Step 2: crushing the filtered residue into filaments using a hammer-type pulp remover to obtain natural fiber material;

[0016] The control method of the hammer type pulp removal machine:

[0017] A current sensor is installed on the motor of the hammer-type pulping machine, and a drop baffle is provided at the drop port of the filtered slag conveyor belt before the filtered slag enters the hammer-type pulping machine;

[0018] The baffle is driven by an electric hydraulic push rod, and a monitoring system is installed above the drained slag outlet and the spiral blade of the hammer-type pith remover;

[0019] A PLC controller is installed in the operating room and connected to a display screen. The current sensor transmits the current value signal of the hammer pulp remover motor to the PLC controller, which processes the internal instructions of the PLC controller and outputs the signal to control the operation of the electric hydraulic push rod motor.

[0020] Drive the electric hydraulic push rod to work and adjust the opening degree of the blanking plate at the same time, so as to control the amount of slag filtered out of the slag discharge port;

[0021] Ensure that the pulp remover maintains normal work of breaking up and turning over the filtered slag;

[0022] The installed monitoring system also allows operators to understand the working status of the conveying of filtered slag and the hammer type pith remover;

[0023] Step three: measuring the permeability of natural fiber fabrics; and testing the wetting properties of natural fiber samples.

[0024] Furthermore, the method for measuring the permeability of natural fiber fabrics is as follows:

[0025] (1) configuring parameters of a natural fiber measuring device, wherein a natural fiber sample to be tested is laid in a mold of the natural fiber measuring device; measuring and calculating an in-plane unsaturated permeability K0 of the natural fiber sample to be tested in a first test liquid, wherein the first test liquid does not cause the natural fiber sample to be tested to absorb and swell;

[0026] (2) measuring and calculating the in-plane unsaturated permeability Kend of the natural fiber sample to be tested in the second test liquid, and recording the time tend when the second test liquid fills the mold, wherein the second test liquid causes the natural fiber sample to be tested to absorb and swell; calculating the in-plane unsaturated permeability of the natural fiber sample to be tested at different times;

[0027] According to the formula K=K0-(K0-K end ) / (t end ) 2 *t 2 The in-plane unsaturated permeability of the natural fiber sample to be tested at different times is calculated.

[0028] And the measurement method has the following characteristics:

[0029] measuring the in-plane unsaturated permeability K0 under the condition that the flow rate of the first test liquid is constant;

[0030] Under the condition that the flow rate of the second test liquid is constant, the in-plane unsaturated permeability Kend is measured;

[0031] Furthermore, the viscosity of the first test liquid is the same as the viscosity of the second test liquid;

[0032] Furthermore, the flow rate of the first test liquid is the same as the flow rate of the second test liquid.

[0033] Furthermore, the natural fiber fabric includes: natural fiber felt and natural fiber plain fabric.

[0034] Furthermore, the laying method of the natural fiber sample to be tested includes unidirectional laying or quasi-isotropic laying.

[0035] Furthermore, the method for testing the wettability of natural fiber samples is as follows:

[0036] 1) Cut a section of heat shrink tubing; through experiments, determine the maximum number n of natural fiber samples that can completely pass through the heat shrink tubing; cut n natural fiber samples; use one natural fiber sample to pull n natural fiber samples through the heat shrink tubing, so that the natural fiber sample is exposed at the front end of the heat shrink tubing;

[0037] 2) preparing a curable resin system with a viscosity of ≤200 cps and a gel time of ≥3 hours; immersing all the natural fiber samples exposed at the front end of the heat shrink tubing in the curable resin system, and suspending the samples vertically on a bracket, adjusting the height of the natural fiber samples to be tested to be consistent;

[0038] 3) After 65 minutes, remove the sample from the resin and place it in an oven together with the support to bake the resin until the resin becomes solid; remove the heat shrink tubing; cut the exposed portion of the natural fiber sample at the front end and then cut the soaked portion of the natural fiber sample at the rear end to obtain natural fiber sample rods of the same length, and weigh them to obtain the weight m;

[0039] 4) Add an appropriate amount of water to the graduated cylinder and record the volume V0; completely immerse the natural fiber sample stick in the water and record the volume V1, thus obtaining the volume of the natural fiber sample stick V = V1 - V0; calculate the density of the natural fiber sample stick ρ = m / V to compare the wettability. That is, the greater the density, the smaller the internal pores of the natural fiber sample stick and the better the wettability.

[0040] Furthermore, the heat shrink tube is a silicone heat shrink tube.

[0041] Furthermore, the heat shrink tube is cut to 22 cm and has an inner diameter of 12 mm.

[0042] Furthermore, the length of the n fibers is 28 cm, and the length of the n natural fiber samples is 8 cm longer than the length of the heat shrink tube.

[0043] Furthermore, the natural fiber sample is exposed 5 cm from the front end of the heat shrink tube.

[0044] Furthermore, the curing temperature of the curable resin system does not exceed 200°C.

[0045] In combination with the above technical solutions and the technical problems solved, please analyze the advantages and positive effects of the technical solutions to be protected by the present invention from the following aspects:

[0046] First, in view of the technical problems existing in the above-mentioned prior art and the difficulty of solving these problems, this paper closely combines the technical solutions to be protected by the present invention and the results and data during the research and development process, and analyzes in detail and in depth how the technical solutions of the present invention solve the technical problems and some creative technical effects brought about by solving the problems. The specific description is as follows:

[0047] The present invention can accurately measure the permeability of natural fiber fabrics by using a method for measuring the permeability of natural fiber fabrics; at the same time, the method for testing the wetting performance of natural fiber samples utilizes the fact that an organic silicone heat shrink tube shrinks after being heated, thereby expelling bubbles between the natural fiber samples before baking; the size and number of surface defects of the natural fiber sample rod can be observed to preliminarily judge the wetting performance; the characteristics of a certain natural fiber sample are not utilized, and therefore the method can be applied to different natural fiber samples; the density test does not require any precision instruments, and the error of measuring the volume by displacement is small; therefore, the present invention has the characteristics of low cost, accurate testing, intuitive test results, and a wide range of applications.

[0048] Second, considering the technical solution as a whole or from the perspective of the product, the technical effects and advantages of the technical solution to be protected by the present invention are described in detail as follows:

[0049] The present invention can accurately measure the permeability of natural fiber fabrics by using a method for measuring the permeability of natural fiber fabrics; at the same time, the method for testing the wetting performance of natural fiber samples utilizes the fact that an organic silicone heat shrink tube shrinks after being heated, thereby expelling bubbles between the natural fiber samples before baking; the size and number of surface defects of the natural fiber sample rod can be observed to preliminarily judge the wetting performance; the characteristics of a certain natural fiber sample are not utilized, and therefore the method can be applied to different natural fiber samples; the density test does not require any precision instruments, and the error of measuring the volume by displacement is small; therefore, the present invention has the characteristics of low cost, accurate testing, intuitive test results, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a flow chart of a method for producing natural fibers for textiles using an environmentally friendly bio-chemical method, as provided in an embodiment of the present invention.

[0051] Figure 2 This is a flow chart of a method for measuring the permeability of natural fiber fabrics provided by an embodiment of the present invention.

[0052] Figure 3 This is a flow chart of a method for testing the wettability of natural fiber samples provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0054] 1. Explanatory Examples In order to enable those skilled in the art to fully understand how to implement the present invention, this section provides an illustrative example that expands upon the technical solutions of the claims.

[0055] like Figure 1 As shown, the present invention provides an environmentally friendly method for preparing natural fibers for textiles by a bio-chemical co-processing method, comprising the following steps:

[0056] S101, the herb is air-dried, placed in a fermentation tank, and inoculated with anaerobic microorganisms for fermentation, whereby the organic components are partially converted into combustible gases, mainly methane, and small molecules dissolved in the fermentation liquid, while the remaining cellulose and lignin remain in the fermentation liquid as residues;

[0057] The anaerobic microorganism cultivation method:

[0058] After the culture medium solution is prepared, methylene blue is added as a redox state indicator; at room temperature, a scavenger is added to the culture medium solution, shaken to dissolve, and the culture medium solution is immediately dispensed into culture bottles, which are then capped with rubber stoppers and bottle caps. The dispensing and capping operations should be controlled within 30 minutes.

[0059] Passing nitrogen through the rubber stopper with a syringe needle into the treated culture bottle, while exhausting the air at the same time to exchange the air above the solution in the culture bottle; sterilizing the treated culture bottle with high-temperature steam, cooling it, and setting it aside;

[0060] The culture medium solution is a liquid culture medium solution; the weight volume percentage of the methylene blue in the culture medium solution is 0.0006%;

[0061] The room temperature state refers to the room temperature being less than or equal to 37°C;

[0062] The oxygen scavenger is vitamin C and its sodium salt, isovitaminosis C and its sodium salt, cysteine ​​and its hydrochloride, or a complex of these substances;

[0063] S102, crushing the filtered residue into filaments using a hammer-type pulp remover to obtain a natural fiber material;

[0064] The control method of the hammer type pulp removal machine:

[0065] A current sensor is installed on the motor of the hammer-type pulping machine, and a drop baffle is provided at the drop port of the filtered slag conveyor belt before the filtered slag enters the hammer-type pulping machine;

[0066] The baffle is driven by an electric hydraulic push rod, and a monitoring system is installed above the drained slag outlet and the spiral blade of the hammer-type pith remover;

[0067] A PLC controller is installed in the operating room and connected to a display screen. The current sensor transmits the current value signal of the hammer pulp remover motor to the PLC controller, which processes the internal instructions of the PLC controller and outputs the signal to control the operation of the electric hydraulic push rod motor.

[0068] Drive the electric hydraulic push rod to work and adjust the opening degree of the blanking plate at the same time, so as to control the amount of slag filtered out of the slag discharge port;

[0069] Ensure that the pulp remover maintains normal work of breaking up and turning over the filtered slag;

[0070] The installed monitoring system also allows operators to understand the working status of the conveying of filtered slag and the hammer type pith remover;

[0071] S103, measuring the permeability of natural fiber fabrics; and testing the wetting properties of natural fiber samples.

[0072] like Figure 2 As shown, the method for measuring the permeability of natural fiber fabrics provided by the present invention is as follows:

[0073] S201, configuring parameters of a natural fiber measuring device, wherein a natural fiber sample to be tested is placed in a mold of the natural fiber measuring device; measuring and calculating an in-plane unsaturated permeability K0 of the natural fiber sample to be tested in a first test liquid, wherein the first test liquid does not cause the natural fiber sample to be tested to absorb and swell;

[0074] S202, measuring and calculating an in-plane unsaturated permeability Kend of the natural fiber sample to be tested in a second test liquid, and recording a time tend when the second test liquid fills the mold, and the second test liquid causes the natural fiber sample to be tested to absorb and swell; calculating the in-plane unsaturated permeability of the natural fiber sample to be tested at different times;

[0075] According to the formula K=K0-(K0-K end ) / (t end ) 2 *t 2 The in-plane unsaturated permeability of the natural fiber sample to be tested at different times is calculated.

[0076] And the measurement method has the following characteristics:

[0077] measuring the in-plane unsaturated permeability K0 under the condition that the flow rate of the first test liquid is constant;

[0078] Under the condition that the flow rate of the second test liquid is constant, the in-plane unsaturated permeability Kend is measured;

[0079] Furthermore, the viscosity of the first test liquid is the same as the viscosity of the second test liquid;

[0080] Furthermore, the flow rate of the first test liquid is the same as the flow rate of the second test liquid.

[0081] The natural fiber fabrics provided by the present invention include: natural fiber felt and natural fiber plain fabric.

[0082] The laying method of the natural fiber sample to be tested provided by the present invention includes unidirectional laying or quasi-isotropic laying.

[0083] like Figure 3 As shown, the method for testing the wettability of natural fiber samples provided by the present invention is as follows:

[0084] S301, cutting a section of heat shrink tubing; determining, through experimentation, the maximum number n of natural fiber samples that can completely pass through the heat shrink tubing; cutting n natural fiber samples; and using one natural fiber sample to pull n natural fiber samples through the heat shrink tubing, such that the natural fiber samples are exposed at the front end of the heat shrink tubing;

[0085] S302, preparing a curable resin system with a viscosity of ≤200 cps and a gel time of ≥3 hours; immersing all the natural fiber samples exposed at the front end of the heat shrink tubing in the curable resin system, and vertically suspending the natural fiber samples on a bracket, adjusting the heights of the natural fiber samples to be tested to be consistent;

[0086] S303, after 65 minutes, remove the sample from the resin and place it in an oven together with the support to bake the resin to solidify it; remove the heat shrink tube; cut the exposed portion of the natural fiber sample at the front end and then cut the soaked portion of the natural fiber sample at the rear end to obtain natural fiber sample rods of the same length, and weigh them to obtain a weight m;

[0087] S304, add an appropriate amount of water to the measuring cylinder and record the volume V0; completely immerse the natural fiber sample rod in water and record the volume V1, then the volume of the natural fiber sample rod V = V1-V0 is obtained; calculate the density of the natural fiber sample rod ρ = m / V to compare the wettability, that is, the greater the density, the smaller the internal pores of the natural fiber sample rod, and the better the wettability.

[0088] The heat shrinkable tube provided by the present invention is an organic silicone heat shrinkable tube.

[0089] The heat shrink tube provided by the present invention is cut into 22 cm and has an inner diameter of 12 mm.

[0090] The length of the n fibers provided by the present invention is 28 cm, and the length of the n natural fiber samples is 8 cm longer than the length of the heat shrink tube.

[0091] The natural fiber sample provided by the present invention is exposed 5 cm from the front end of the heat shrink tube.

[0092] The curing temperature of the curable resin system provided by the present invention does not exceed 200°C.

[0093] 2. Application Examples: In order to demonstrate the creativity and technical value of the technical solution of the present invention, this section provides application examples of the claimed technical solution on specific products or related technologies.

[0094] The present invention can accurately measure the permeability of natural fiber fabrics by using a method for measuring the permeability of natural fiber fabrics; at the same time, the method for testing the wetting performance of natural fiber samples utilizes the fact that an organic silicone heat shrink tube shrinks after being heated, thereby expelling bubbles between the natural fiber samples before baking; the size and number of surface defects of the natural fiber sample rod can be observed to preliminarily judge the wetting performance; the characteristics of a certain natural fiber sample are not utilized, and therefore the method can be applied to different natural fiber samples; the density test does not require any precision instruments, and the error of measuring the volume by displacement is small; therefore, the present invention has the characteristics of low cost, accurate testing, intuitive test results, and a wide range of applications.

[0095] It should be noted that the embodiments of the present invention can be implemented by hardware, software, or a combination of software and hardware. The hardware portion can be implemented using dedicated logic; the software portion can be stored in a memory and executed by an appropriate instruction execution system, such as a microprocessor or dedicated design hardware. Those skilled in the art will appreciate that the above-mentioned devices and methods can be implemented using computer-executable instructions and / or contained in processor control code, for example, such as a carrier medium such as a disk, CD or DVD-ROM, a programmable memory such as a read-only memory (firmware), or a data carrier such as an optical or electronic signal carrier. The devices and modules of the present invention can be implemented by hardware circuits such as very large-scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., can also be implemented by software executed by various types of processors, or can be implemented by a combination of the above-mentioned hardware circuits and software, such as firmware.

[0096] 3. Evidence of the effects of the embodiments: The embodiments of the present invention have achieved some positive effects during the development or use process, and indeed have great advantages over the existing technology. The following content describes them with reference to the data, charts, etc. of the experimental process.

[0097] The present invention can accurately measure the permeability of natural fiber fabrics by using a method for measuring the permeability of natural fiber fabrics; at the same time, the method for testing the wetting performance of natural fiber samples utilizes the fact that an organic silicone heat shrink tube shrinks after being heated, thereby expelling bubbles between the natural fiber samples before baking; the size and number of surface defects of the natural fiber sample rod can be observed to preliminarily judge the wetting performance; the characteristics of a certain natural fiber sample are not utilized, and therefore the method can be applied to different natural fiber samples; the density test does not require any precision instruments, and the error of measuring the volume by displacement is small; therefore, the present invention has the characteristics of low cost, accurate testing, intuitive test results, and a wide range of applications.

[0098] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. An environmentally friendly method for producing natural fibers for textiles by a biochemical co-processing method, characterized in that: The environmentally friendly bio-chemical method for producing natural fibers for textiles comprises the following steps: Step 1: The herb is air-dried, placed in a fermentation tank, and inoculated with anaerobic microorganisms to ferment, converting its organic components into combustible gases, mainly methane, and small molecules that dissolve in the fermentation liquid. The remaining cellulose and lignin remain in the fermentation liquid as residues. Anaerobic microbial culture method: After the culture medium solution is prepared, methylene blue is added as a redox state indicator; at room temperature, a scavenger is added to the culture medium solution, shaken to dissolve, and the culture medium solution is immediately dispensed into culture bottles, which are then capped with rubber stoppers and bottle caps. The dispensing and capping operations should be controlled within 30 minutes. Passing nitrogen through the rubber stopper with a syringe needle into the treated culture bottle, while exhausting the air at the same time to exchange the air above the solution in the culture bottle; sterilizing the treated culture bottle with high-temperature steam, cooling it, and setting it aside; The culture medium solution is a liquid culture medium solution; the weight volume percentage of the methylene blue in the culture medium solution is 0.0006%; The room temperature state refers to the room temperature being less than or equal to 37°C; The oxygen scavenger is vitamin C and its sodium salt, isovitaminosis C and its sodium salt, cysteine ​​and its hydrochloride, or a complex of these substances; Step 2: crushing the filtered residue into filaments using a hammer-type pulp remover to obtain natural fiber material; The control method of the hammer type pulp removal machine: A current sensor is installed on the motor of the hammer-type pulping machine, and a drop baffle is provided at the drop port of the filtered slag conveyor belt before the filtered slag enters the hammer-type pulping machine; The baffle is driven by an electric hydraulic push rod, and a monitoring system is installed above the drained slag outlet and the spiral blade of the hammer-type pith remover; A PLC controller is installed in the operating room and connected to a display screen. The current sensor transmits the current value signal of the hammer pulp remover motor to the PLC controller, which processes the internal instructions of the PLC controller and outputs the signal to control the operation of the electric hydraulic push rod motor. Drive the electric hydraulic push rod to work and adjust the opening degree of the blanking plate at the same time, so as to control the amount of slag filtered out of the slag discharge port; Ensure that the pulp remover maintains normal work of breaking up and turning over the filtered slag; The installed monitoring system also allows operators to understand the working status of the conveying of filtered slag and the hammer type pith remover; Step 3: measuring the permeability of natural fiber fabrics; and testing the wetting properties of natural fiber samples; The method for measuring the permeability of natural fiber fabrics is as follows: (1) configuring parameters of a natural fiber measuring device, wherein a natural fiber sample to be tested is laid in a mold of the natural fiber measuring device; measuring and calculating an in-plane unsaturated permeability K0 of the natural fiber sample to be tested in a first test liquid, wherein the first test liquid does not cause the natural fiber sample to be tested to absorb and swell; (2) Determine and calculate the in-plane unsaturated permeability K of the natural fiber sample to be tested in the second test liquid end , and record the time t when the second test liquid fills the mold end The second test liquid causes the natural fiber sample to absorb and swell; and the in-plane unsaturated permeability of the natural fiber sample at different times is calculated; According to the formula K=K0-(K0-K end ) / (t end ) 2 *t 2 The in-plane unsaturated permeability of the natural fiber sample to be tested at different times is calculated. And the measurement method has the following characteristics: The in-plane unsaturated permeability measured under the condition of constant flow rate of the first test liquid is K0; The in-plane unsaturated permeability K is measured under the condition of constant flow rate of the second test liquid. end ; Furthermore, the viscosity of the first test liquid is the same as the viscosity of the second test liquid; Furthermore, the flow rate of the first test liquid is the same as the flow rate of the second test liquid.

2. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 1, wherein: The natural fiber fabrics include natural fiber felt and natural fiber plain fabrics.

3. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 1, characterized in that: The laying method of the natural fiber sample to be tested includes unidirectional laying or quasi-isotropic laying.

4. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 1, wherein: The method for testing the wettability of natural fiber samples is as follows: 1) Cut a section of heat shrink tubing; through experiments, determine the maximum number n of natural fiber samples that can completely pass through the heat shrink tubing; cut n natural fiber samples; use one natural fiber sample to pull n natural fiber samples through the heat shrink tubing, so that the natural fiber sample is exposed at the front end of the heat shrink tubing; 2) preparing a curable resin system with a viscosity of ≤200 cps and a gel time of ≥3 hours; immersing all the natural fiber samples exposed at the front end of the heat shrink tubing in the curable resin system, and suspending the samples vertically on a bracket, adjusting the height of the natural fiber samples to be tested to be consistent; 3) After 65 minutes, remove the sample from the resin and place it in an oven together with the support to bake the resin until the resin becomes solid; remove the heat shrink tubing; cut the exposed portion of the natural fiber sample at the front end and then cut the soaked portion of the natural fiber sample at the rear end to obtain natural fiber sample rods of the same length, and weigh them to obtain the weight m; 4) Add an appropriate amount of water to the graduated cylinder and record the volume V0; completely immerse the natural fiber sample stick in the water and record the volume V1, thus obtaining the volume of the natural fiber sample stick V = V1 - V0; calculate the density of the natural fiber sample stick ρ = m / V to compare the wettability. That is, the greater the density, the smaller the internal pores of the natural fiber sample stick and the better the wettability.

5. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 4, characterized in that: The heat shrink tube is a silicone heat shrink tube.

6. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 4, characterized in that: The heat shrink tube is cut to 22 cm and has an inner diameter of 12 mm.

7. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 4, characterized in that: The length of the natural fiber is 28 cm, and the length of the n natural fiber samples is 8 cm longer than the length of the heat shrink tube.

8. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 4, characterized in that: The natural fiber sample is exposed 5 cm from the front end of the heat shrink tube.

9. The environmentally friendly bio-chemical method for producing natural fibers for textiles according to claim 4, wherein: The curing temperature of the curable resin system does not exceed 200°C.

Images