Preparation method of Chinese herbal medicine water-soluble fiber

Abstract

The invention discloses a preparation method of Chinese herbal medicine water-soluble fibers, and relates to the field of textile, and the preparation method of a spinning stock solution comprises the following steps: dissolving 4-8% of Chinese herbal medicine powder, 8-15% of a water-soluble hydroxyl polymer and 2-5% of a water-soluble thermoplastic polymer in water to prepare the spinning stock solution, heating the stock solution to 100-110 DEG C, maintaining the pressure at 0.05-0.08 MPa, and fully stirring to dissolve the solution; 2, primary fiber preparation: filtering and defoaming the spinning stock solution prepared in the step 1, then conveying the stock solution to a spinning assembly by a metering pump, spraying the stock solution into a plasticizer from a small hole of a spinning nozzle, controlling the temperature of the plasticizer to be 40-70 DEG C, and fully mixing the stock solution in the plasticizer for 1-2 hours after spinning to prepare the primary fiber; and preparing the Chinese herbal medicine water-soluble fiber: primarily stretching the primary fiber prepared in the step 2 in a damp and hot manner at the stretching temperature of 130-200 DEG C, performing heat setting at 70-180 DEG C, and finally performing a hot water curling process to obtain the Chinese herbal medicine water-soluble fiber. The method is safe, sanitary, high in production efficiency, simple, convenient and suitable for industrial production of health care products.

Description

Technical Field

[0001] The invention mainly relates to the technical field of textiles, and specifically relates to a method for preparing water-soluble Chinese herbal medicine fibers. Background Art

[0003] Water-soluble hydroxyl polymers, such as polyvinyl alcohol (PVA) and starch derivatives, have become one of the ideal matrix materials for preparing drug-loaded fibers due to their good film-forming properties, biocompatibility and certain water solubility. At the same time, the introduction of water-soluble thermoplastic polymers, such as polyvinyl pyrrolidone (PVP) and polyethylene glycol (PEG), can not only adjust the physical properties of the fiber, such as strength, softness and heat resistance, but also further enhance the stability and release characteristics of Chinese herbal medicine ingredients.

[0004] In the existing technology, firstly, how to ensure the stability and durability of Chinese herbal ingredients in the textile process is a major problem; at the same time, the entire preparation process and technological formulation are still lacking and cannot meet the requirements of high-efficiency production. Secondly, how can the active ingredients of Chinese herbal medicines be effectively absorbed by the skin and exert their effects while maintaining the comfort and wearing experience of the fabric is also an urgent problem to be solved by personnel in this technical field. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a method for preparing water-soluble fiber of Chinese herbal medicine to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A method for preparing water-soluble Chinese herbal fiber, comprising the following steps:

[0008] Step 1, preparation of spinning solution: 4-8% of Chinese herbal medicine powder, 8-15% of water-soluble hydroxyl polymer and 2-5% of water-soluble thermoplastic polymer are dissolved in water to prepare spinning solution, the solution is heated to 100-110°C, and the pressure is maintained at 0.05-0.08MPa and stirred to dissolve;

[0009] Step 2, preparation of original fiber: after filtering and degassing the spinning solution prepared in step 1, the solution is pumped to the spinning assembly by a metering pump, and the solution is sprayed into the plasticizer from the small hole of the spinneret, the temperature of the plasticizer is 40-70°C, and after spinning, the solution is fully mixed in the plasticizer for 1-2 hours to obtain the original fiber;

[0010] Step 3, preparation of Chinese herbal water-soluble fiber: the original fiber prepared in step 2 is subjected to wet heat initial stretching at a stretching temperature of 130°C-200°C, heat setting at 70°C-180°C, and finally hot water curling process to obtain Chinese herbal water-soluble fiber.

[0011] Preferably, the Chinese herbal medicine powder is a dispersed powder with grinding particles of 200 - 500 nm, and the efficacy of the original Chinese herbal medicine powder is maintained.

[0012] Preferably, the water-soluble hydroxyl polymer is composed of one or more of polyvinyl alcohol, polyvinyl alcohol derivatives, polyvinyl alcohol copolymers, deacetylated chitosan, deacetylated chitosan derivatives, deacetylated chitosan copolymers, cellulose derivatives, cellulose copolymers, hemicellulose, hemicellulose derivatives, hemicellulose copolymers, and gums.

[0013] Preferably, the water-soluble thermoplastic polymer is composed of one or more of thermoplastic starch, starch derivatives, polylactic acid, polyhydroxyalkanoates, polycaprolactone, and polyester amide.

[0014] Preferably, in step two, the mass percentage of the spinning dope to the coagulant is 2:1 - 2.

[0015] Preferably, the coagulant is formed by mixing polyhydric alcohol and amide compound in a mass ratio of 4:1.

[0016] Preferably, the polyhydric alcohol is at least one of glycerol, ethylene glycol, and polyethylene glycol.

[0017] Preferably, the amide compound is at least one of phenylboric acid, ethanolamine, N,N-dimethylacetamide, N,N-dimethylformamide, and caprolactam.

[0018] Preferably, the properties of the water-soluble Chinese herbal medicine fiber are as follows:

[0019] The fineness is 40 - 180 dtex;

[0020] The strength ≥ 2.2 cN / dtex;

[0021] The elongation at break ≤ 20%;

[0022] The water-soluble temperature is 30℃ - 80℃;

[0023] The fiber length is 6 mm - 80 mm.

[0024] In summary, the present invention mainly has the following beneficial effects:

[0025] The Chinese herbal medicine powder used in this preparation method has been finely ground to the nanometer level to ensure the purity and uniformity of the raw materials, while retaining the effective ingredients and efficacy of the Chinese herbal medicine. In addition, the selected water-soluble hydroxyl polymers and water-soluble thermoplastic polymers are food-grade or medical-grade materials, non-toxic and harmless, and meet safety and hygiene standards; production process control: the preparation, filtration, degassing and spinning of the spinning solution are all carried out in a closed and sterile environment, effectively avoiding external pollution. The selection and ratio of the plasticizer have also been strictly screened to ensure the chemical stability and biological safety of the production process; finished product quality assurance: the final Chinese herbal water-soluble fiber is processed through multiple processes such as wet heat initial stretching, heat setting and hot water curling, which not only improves the physical properties of the fiber, but also further ensures the safety and hygiene of the product;

[0026] This preparation method can adopt advanced automated production equipment, such as metering pumps, spinning machines, heat stretching and heat setting equipment, etc., to achieve full automated control from raw material input to finished product output, greatly improving production efficiency; continuous production: the spinning solution undergoes continuous filtration, degassing and spinning processes to form continuous native fibers, and then undergoes continuous heat stretching, heat setting and curling treatments to achieve continuous production of products and reduce production interruptions and waiting time; short-cycle production: due to the use of efficient heating, cooling and curing technologies, the time of the entire production process is greatly shortened, and the cycle from raw material input to finished product output is significantly reduced, thereby improving production efficiency and the ability to respond to market changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall flow chart of the present invention. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1 As shown, a method for preparing water-soluble Chinese herbal fiber comprises the following preparation steps:

[0030] Preparation of spinning solution: 4-8% of Chinese herbal medicine powder, 8-15% of water-soluble hydroxyl polymer and 2-5% of water-soluble thermoplastic polymer are dissolved in water to prepare spinning solution, the solution is heated to 100-110°C, and the pressure is maintained at 0.05-0.08MPa and stirred to dissolve;

[0031] Preparation of original fiber: After filtering and degassing, the prepared spinning solution is pumped to the spinning assembly by a metering pump, and the solution is sprayed into the plasticizer from the spinneret hole. The temperature of the plasticizer is 40-70°C. After spinning, the solution is fully mixed in the plasticizer for 1-2 hours to obtain the original fiber;

[0032] Preparation of Chinese herbal medicine water-soluble fiber: The prepared native fiber is subjected to wet-heat primary stretching at a stretching temperature of 130°C - 200°C, heat setting is carried out at 70°C - 180°C, and finally the hot water crimping process is carried out to obtain the Chinese herbal medicine water-soluble fiber.

[0033] The Chinese herbal medicine powder is a dispersed powder with grinding particles of 200 - 500 nm, and the efficacy of the original Chinese herbal medicine powder is maintained.

[0034] The water-soluble hydroxyl polymer is composed of one or more of polyvinyl alcohol, polyvinyl alcohol derivatives, polyvinyl alcohol copolymers, chitosan, chitosan derivatives, chitosan copolymers, cellulose derivatives, cellulose copolymers, hemicellulose, hemicellulose derivatives, hemicellulose copolymers, gums.

[0035] The water-soluble thermoplastic polymer is composed of one or more of thermoplastic starch, starch derivatives, polylactic acid, polyhydroxyalkanoates, polycaprolactone, polyester amides.

[0036] The mass percentage of the spinning dope to the coagulant is 2:1 - 2.

[0037] The coagulant is a mixture of polyols and amide compounds in a mass ratio of 4:1.

[0038] The polyol is at least one of glycerol, ethylene glycol, polyethylene glycol.

[0039] The amide compound is at least one of phenylboric acid, ethanolamine, N,N-dimethylacetamide, N,N-dimethylformamide, and caprolactam.

[0040] The properties of the Chinese herbal medicine water-soluble fiber are as follows:

[0041] The fineness is 40 - 180 dtex;

[0042] The strength ≥ 2.2 cN / dtex;

[0043] The elongation at break ≤ 20%;

[0044] The water-soluble temperature is 30°C - 80°C;

[0045] The fiber length is 6 mm - 80 mm.

[0046] Example

[0047] It should be noted that in this example, for the preparation of the spinning dope for the Chinese herbal medicine water-soluble fiber for preventing eczema and relieving itching:

[0048] Raw material ratio: Select 6% of Chinese herbal medicine powder ground to 300 - 500 nm (specifically including the components of lithospermum root, borneol, phellodendron bark, purslane, dandelion, and wild chrysanthemum, maintaining its efficacy of clearing heat and detoxifying).

[0049] 12% of water-soluble hydroxyl polymer (mainly composed of 78% polyvinyl alcohol, 14% chitosan, and 8% gum by mass).

[0050] 4% of water-soluble thermoplastic polymer (mainly composed of 34% thermoplastic starch and 66% polylactic acid by mass).

[0051] Dissolution process: Add the above raw materials into deionized water to ensure an appropriate total solid content to form a homogeneous solution. Subsequently, heat the mixture to 105 °C and continuously stir it under a pressure of 0.06 MPa for 2 hours to ensure that all components are completely dissolved to form a transparent spinning dope.

[0052] Preparation of virgin fiber:

[0053] Pretreatment: The spinning dope is passed through a precision filter to remove impurities and then through a vacuum degassing device to remove air bubbles in the solution.

[0054] Spinning process: Use a metering pump to stably transport the pretreated spinning dope to the spinning assembly and uniformly spray it into the coagulant through a spinneret (with a pore diameter of 0.1 mm). The coagulant is composed of glycerol and N,N-dimethylacetamide mixed in a mass ratio of 4:1, and the temperature is maintained at 70 °C.

[0055] Coagulation and curing: The spinning solution is fully mixed in the coagulant for 1.5 hours to form primary fibers.

[0056] Preparation of Chinese herbal medicine water-soluble fiber:

[0057] Wet-heat primary drawing: Perform wet-heat primary drawing on the primary fibers at 150 °C to improve the orientation degree and strength of the fibers.

[0058] Heat setting: Subsequently, perform heat setting treatment at 170 °C to fix the morphological structure of the fibers.

[0059] Hot water crimping: Finally, place the fibers in hot water at 70 °C for crimping treatment to enhance the elasticity and handle of the fibers.

[0060] Fiber performance testing:

[0061] Fineness: The fineness of the fibers is measured to be 70 dtex.

[0062] Strength: The strength test results show that the fiber strength reaches 2.6 cN / dtex, exceeding the standard requirement of 2.2 cN / dtex.

[0063] Elongation at break: The elongation at break is 13%, meeting the requirement of ≤20%.

[0064] This fiber is blended with cotton and woven into a plain woven fabric. After being washed 10 times at room temperature, the hydrolysis degree of the water-soluble fiber is 45%, having the efficacy of preventing eczema, relieving itching, and slow release.

[0065] Example 2

[0066] Preparation of enhanced water-soluble Chinese herbal medicine fiber for preventing eczema and relieving itching.

[0067] Preparation of spinning dope:

[0068] Raw material ratio: In order to further enhance the effect of preventing eczema and relieving itching, the Chinese herbal medicine components are slightly adjusted in this example. 8% of Chinese herbal medicine powder ground to 300 - 500 nm is selected (the specific formula is 12% of Lithospermum erythrorhizon, 8% of Borneol, 15% of Phellodendron amurense, 20% of Portulaca oleracea, 20% of Taraxacum mongolicum, 25% of Chrysanthemum indicum. Each component maintains its original efficacy of clearing heat and detoxifying and relieving itching, and the overall medicinal effect is enhanced through scientific ratio). The water-soluble hydroxyl polymer is adjusted to 10% (composed of 70% of polyvinyl alcohol, 20% of chitosan, and 10% of cellulose derivative by mass) to optimize the physical properties and drug loading capacity of the fiber. The water-soluble thermoplastic polymer remains 4% (mainly composed of 30% of thermoplastic starch and 70% of polylactic acid by mass) to ensure the thermoplasticity and processing performance of the fiber.

[0069] Dissolution process: The same as in Example 1, the above raw materials are added to deionized water, heated to 105°C, and stirred for 2 hours under a pressure of 0.06 MPa to form a uniform spinning dope.

[0070] Preparation of virgin fiber:

[0071] Pretreatment and spinning process: After the spinning dope is precisely filtered and vacuum degassed, it is transported to the spinning assembly by a metering pump and evenly sprayed into the coagulant through a spinneret with a pore diameter of 0.1 mm. The composition and temperature control of the coagulant are the same as in Example 1.

[0072] Coagulation and curing: The spinning solution is mixed in the coagulant for 1.5 hours to form nascent fibers.

[0073] Preparation of water-soluble Chinese herbal medicine fiber:

[0074] Wet-heat primary stretching, heat setting, and hot water crimping: The nascent fibers are subjected to wet-heat primary stretching at 150°C, heat setting at 170°C, and crimping in hot water at 70°C to enhance the physical properties and handle of the fibers.

[0075] Fiber property testing:

[0076] Fineness: The fineness of the measured fiber is 90 dtex, which is increased compared to Example 1 to meet the requirements of specific textiles for fiber thickness.

[0077] Strength: The strength test results show that the fiber strength reaches 2.8 cN / dtex, further exceeding the standard requirement of 2.2 cN / dtex, indicating that the fiber has excellent mechanical properties.

[0078] Elongation at break: The elongation at break is 12%, still within the range of ≤20%, maintaining good elasticity.

[0079] Application and effect evaluation:

[0080] Fabric manufacturing and hydrolysis degree test: The fiber is blended with cotton to produce a woven plain fabric. After washing 10 times at room temperature, the hydrolysis degree of the water-soluble fiber is 40%. Although slightly lower than that in Example 1, it is still within an acceptable range, and the hydrolysis process helps the slow release of Chinese herbal medicine ingredients.

[0081] Evaluation of anti-eczema and antipruritic effects: Through skin irritation tests and clinical trials, the fabric is proven to have significant anti-eczema and antipruritic effects, and the medicinal effect is long-lasting, meeting the needs of consumers for healthy textiles.

[0082] The above embodiments are only used to illustrate the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention fall within the protection scope of the present invention.

Claims

1. A method for preparing water-soluble Chinese herbal fiber, characterized in that , comprising the following preparation steps: Step 1, preparation of spinning solution: 4-8% of Chinese herbal medicine powder, 8-15% of water-soluble hydroxyl polymer and 2-5% of water-soluble thermoplastic polymer are dissolved in water to prepare spinning solution, the solution is heated to 100-110°C, and the pressure is maintained at 0.05-0.08MPa and stirred to dissolve; Step 2, preparation of original fiber: after filtering and degassing the spinning solution prepared in step 1, the solution is pumped to the spinning assembly by a metering pump, and the solution is sprayed into the plasticizer from the small hole of the spinneret, the temperature of the plasticizer is 40-70°C, and after spinning, the solution is fully mixed in the plasticizer for 1-2 hours to obtain the original fiber; Step 3, preparation of Chinese herbal water-soluble fiber: the original fiber prepared in step 2 is subjected to wet heat initial stretching at a stretching temperature of 130°C-200°C, heat setting at 70°C-180°C, and finally hot water curling process to obtain Chinese herbal water-soluble fiber.

2. The method for preparing a water-soluble Chinese herbal fiber according to claim 1, characterized in that: The Chinese herbal medicine powder is a dispersed powder with grinding particles of 200-500nm, and maintains the efficacy of the original Chinese herbal medicine powder.

3. The method for preparing a water-soluble Chinese herbal fiber according to claim 1, characterized in that: The water-soluble hydroxy polymer is composed of one or more of polyvinyl alcohol, polyvinyl alcohol derivatives, polyvinyl alcohol copolymers, chitosan, chitosan derivatives, chitosan copolymers, cellulose derivatives, cellulose copolymers, hemicellulose, hemicellulose derivatives, hemicellulose copolymers, and gums.

4. The method for preparing a water-soluble Chinese herbal fiber according to claim 1, characterized in that: The water-soluble thermoplastic polymer is composed of one or more of thermoplastic starch, starch derivatives, polylactic acid, polyhydroxyalkanoate, polycaprolactone and polyester amide.

5. The method for preparing a water-soluble Chinese herbal fiber according to claim 1, characterized in that: In step 2, the mass percentage of the spinning solution and the plasticizer is 2:1-2.

6. The method for preparing a water-soluble Chinese herbal fiber according to claim 5, characterized in that: The plasticizer is a mixture of polyol and amide compound in a mass ratio of 4:

1.

7. The method for preparing a water-soluble Chinese herbal fiber according to claim 6, characterized in that: The polyol is at least one of glycerol, ethylene glycol and polyethylene glycol.

8. The method for preparing a water-soluble Chinese herbal fiber according to claim 6, characterized in that: The amide compound is at least one of phenylboric acid, ethanolamine, N,N-dimethylacetamide, N,N-dimethylformamide and caprolactam.

9. The method for preparing a water-soluble Chinese herbal fiber according to claim 1, characterized in that: The properties of the Chinese herbal water-soluble fiber are as follows: Denier: 40-180dtex; Strength ≥ 2.2 cN / dtex; Elongation at break ≤ 20%; The water dissolving temperature is 30℃-80℃; The fiber length is 6mm-80mm.

Images