Herbal shoe pad and its preparation method and application

Abstract

The present application provides a kind of herbal shoe pad and its preparation method and application, the preparation method includes the following steps: herbal raw material is crushed to obtain herbal short hair, then mixed with chemical fiber, by air laying to obtain cotton-like mixture, then the upper and lower surfaces of cotton-like mixture are attached with non-woven fabric, and the herbal shoe pad is obtained after heat bonding.The herbal shoe pad provided by the present application can make the shoe pad more environmentally friendly in an industrial mass production mode, while also achieving the use of raw herbal state to absorb foot sweat, decompose and dilute odor, achieve uniform structure, controllable thickness, wear-resistant and usable through air laying and heat bonding, and have the characteristics of original ecology, high adsorption and easy degradation.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven composite materials technology, specifically relating to a herbal grass insole, its preparation method, and its application. Background Technology

[0002] Shoes are an indispensable part of people's lives, mainly consisting of the sole, upper, and insole. The insole comes into direct contact with most of the foot, therefore its performance directly affects foot comfort and health. In some situations, disposable insoles have become the preferred choice. However, existing disposable wood pulp insoles are mainly composed of synthetic fibers, wood pulp, and non-woven fabrics, which suffer from problems such as odor retention, difficulty in decomposition, and poor biodegradability. Traditional straw-woven insoles, relying on hand weaving, suffer from uneven thickness, low strength, easy shedding, and poor wear resistance, making large-scale mass production and standardized use difficult. Therefore, the market urgently needs disposable herbal insoles that are environmentally friendly, sweat-absorbent, odor-resistant, wear-resistant, and mass-producible.

[0003] CN107048594A discloses a cattail medicated insole and its manufacturing method. The insole includes a skin-friendly layer, a medicated layer, and a bottom layer. The skin-friendly layer comprises a cattail woven layer and a cotton cloth layer covering it. The medicated layer is bonded to the underside of the skin-friendly layer and contains an anti-athlete's foot medication. The bottom layer is bonded to the underside of the medicated layer and is composed of a cattail woven layer. The cattail woven layer refers to an insole-like mat woven from cattails. Compared to ordinary leather or cloth insoles, this cattail medicated insole has advantages such as high breathability, good wear resistance, sweat and odor prevention, and comfortable wear resistance. It is a superior insole product, highly favored by consumers, and has significant market value. However, this insole is formed using long cattail weaves, resulting in small internal gaps and easy retention of odors.

[0004] CN221997066U discloses a functional mugwort insole, including an insole body comprising a first fabric piece and a second fabric piece. The first and second fabric pieces are sewn with overlock seams around their perimeter. An opening is formed on one side of the top of the insole body. A cavity is formed between the first and second fabric pieces, through which mugwort floss is filled. A strip of fabric surrounds the insole body and is sewn to the outer perimeter of the insole body via a third seam. First and second seams are interlaced on the insole body, forming several raised grids that massage the soles of the feet. This invention is often used for its health benefits, such as promoting blood circulation, preventing foot odor and athlete's foot, boosting Yang energy, dispelling dampness and cold, and prolonging life. However, the insole's interior is filled with mugwort floss, which is easily compacted during use, leading to a significant decrease in its performance.

[0005] Therefore, how to provide a high-performance, mass-producible herbal insole has become an urgent problem to be solved. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the present invention aims to provide a herbal grass insole, its preparation method, and its application. The herbal grass insole provided by this invention achieves greater environmental friendliness through industrial mass production, while also absorbing foot sweat and decomposing and diluting odors using the original herbal state. Through airflow forming and thermal bonding, it achieves a uniform structure, controllable thickness, and wear resistance, while also possessing natural, high-adsorption, and easily degradable characteristics.

[0007] To achieve this objective, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for preparing herbal grass insoles, the method comprising the following steps: Herbal raw materials are crushed to obtain herbal short fibers, which are then mixed with chemical fibers and formed into a cotton-like mixture (hereinafter referred to as cotton web) by airflow. Non-woven fabric is then attached to the upper and lower surfaces of the cotton-like mixture and thermally bonded to obtain the herbal insole.

[0008] The aforementioned herbal insoles can be industrially mass-produced to make them more environmentally friendly while still absorbing foot sweat and decomposing and diluting odors using the original herbal state. The disposable herbal insoles are made of soft herbal short fibers as the main body, chemical fibers as the bonding material, and non-woven fabric as the surface layer. Through airflow forming and thermal bonding, they achieve a uniform structure, controllable thickness, wear resistance, and usability, while also possessing the characteristics of being natural, highly absorbent, and easily degradable.

[0009] Preferably, the herbaceous raw material includes any one or a combination of at least two of the following: Ula grass, rice straw, needlegrass or sheep beard sedge, and more preferably a combination of Ula grass, rice straw, needlegrass and sheep beard sedge (mass ratio 0.8-1.2:0.8-1.2:0.8-1.2:0.8-1.2).

[0010] The aforementioned specific herbal raw materials, combined with chemical fibers and airflow web forming technology, enable the product to have a uniform structure, controllable thickness, wear resistance, and usability. It has the advantages of being natural and environmentally friendly, porous and sweat-absorbing, able to reduce odors, and easy to degrade, and has achieved continuous industrial production.

[0011] Preferably, the length of the herbaceous short fibers is 3-8 mm, such as 3 mm, 4 mm, 5 mm, 6 mm, 7 mm or 8 mm, but not limited to the values ​​listed above. Other unlisted values ​​within the above range are also applicable.

[0012] Preferably, the chemical fiber includes PE / PP composite chemical fiber and / or PET / PE composite chemical fiber.

[0013] Preferably, the mass ratio of the herbaceous lint to the chemical fiber is (60-75):(25-40).

[0014] Preferably, the nonwoven fabric includes spunbond nonwoven fabric.

[0015] Preferably, the basis weight of the nonwoven fabric is 25-35 g / m². 2 For example, 25 g / m 2 26 g / m 2 27 g / m 2 28 g / m 2 29 g / m 2 30 g / m 2 31 g / m 2 32 g / m 2 33 g / m 2 34 g / m 2 Or 35 g / m 2 The values ​​listed above, but not limited to those listed above, also apply to other unlisted values ​​within the range mentioned above.

[0016] Preferably, the heat bonding temperature is 135-155℃, such as 135℃, 140℃, 145℃, 150℃ or 155℃, but not limited to the values ​​listed above. Other values ​​not listed in the above range are also applicable.

[0017] Preferably, the thickness of the herbal insole is 2-4 mm, such as 2 mm, 2.5 mm, 3 mm, 3.5 mm or 4 mm, but not limited to the values ​​listed above. Other unlisted values ​​within the above range are also applicable.

[0018] Secondly, the present invention provides herbal grass insoles prepared by the preparation method described above.

[0019] Thirdly, the present invention also provides the application of the herbal grass insole as described above in the preparation of disposable insoles.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a herbal insole that can be industrially mass-produced to be more environmentally friendly while still absorbing foot sweat and decomposing and diluting odors using the original herbal state. The disposable herbal insole uses soft herbal short fibers as the main body, chemical fibers as the bonding material, and non-woven fabric as the surface layer. Through airflow forming and thermal bonding, it achieves a uniform structure, controllable thickness, and wear resistance, while also possessing natural, high-absorption, and easily degradable characteristics. Specifically, it includes: Environmentally friendly and natural: Made primarily of natural herbs, the source is renewable and the product is easily biodegradable, meeting the requirements of green, low-carbon and environmental protection policies. Sweat-wicking and deodorizing: The herbal porous structure provides excellent capillary adsorption and breathability, quickly absorbing sweat and reducing odors on the soles of the feet and inside the shoes; Stable molding: Airflow web formation + thermal bonding ensures uniform thickness and dense structure to meet the strength requirements for single use; Suitable for industrialization: The process is continuous, quantitatively controllable, highly automated, and easy to scale up for mass production. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention, the following describes the technical solution of the present invention in conjunction with preferred embodiments of the present invention. However, the present invention is not limited to the scope of the embodiments.

[0022] In the following examples, PE / PP composite fibers and PET / PE composite fibers were purchased from Zhejiang Huifeng Chemical Fiber Co., Ltd.

[0023] Example 1 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbaceous raw materials (a mixture of Ula grass, rice straw, needlegrass and sheep beard grass in a mass ratio of 1:1:1:1) are mechanically broken into short herbaceous fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 70% and PE / PP composite fibers to 30% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0024] Example 2 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbaceous raw materials (a mixture of Ula grass, rice straw, needlegrass and sheep beard grass in a mass ratio of 0.8:1.2:0.8:1.2) are mechanically broken into short herbaceous fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PET / PE composite fibers are placed in the feeding system and conveyed by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 60% and PET / PE composite fibers to 40% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 25g / m 2Spunbond nonwoven fabric; Heat bonding: At a temperature of 135℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0025] Example 3 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbal raw materials (a mixture of Ula grass, rice straw, needlegrass and sheep beard grass in a mass ratio of 1.2:0.8:1.2:0.8) are mechanically broken into short herbal fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 75% and PE / PP composite fibers to 25% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 35g / m 2 Spunbond nonwoven fabric; Heat bonding: at 155℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0026] Example 4 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbaceous raw materials (a mixture of rice straw, needlegrass and sheep's beard grass in a mass ratio of 1:1:1) are mechanically broken into short herbaceous fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 70% and PE / PP composite fibers to 30% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0027] Example 5 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbal raw materials (a mixture of Ula grass, needlegrass and sheep beard grass in a mass ratio of 1:1:1) are mechanically broken into short herbal fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 70% and PE / PP composite fibers to 30% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0028] Example 6 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbaceous raw materials (a mixture of Ula grass, rice straw and sheep's beard sedge in a mass ratio of 1:1:1) are mechanically broken into short herbaceous fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 70% and PE / PP composite fibers to 30% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0029] Example 7 This embodiment provides a herbal grass insole, the preparation method of which is as follows: Pretreatment: The naturally dried herbal raw materials (a mixture of Ula grass, rice straw and needlegrass in a mass ratio of 1:1:1) are mechanically broken into short herbal fibers with a length of 3-8 mm. Feeding: The pre-treated herbal lint and PE / PP composite fibers are placed in the feeding system and supplied by a blower; Quantitative mixing: The quantitative mixing machine will adjust the ratio of herbal short fibers to 70% and PE / PP composite fibers to 30% according to the settings; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0030] Comparative Example 1 This comparative example provides a herbal grass insole, and the preparation method is as follows: Pretreatment: The naturally dried herbaceous raw materials (a mixture of Ula grass, rice straw, needlegrass and sheep beard grass in a mass ratio of 1:1:1:1) are mechanically broken into short herbaceous fibers with a length of 3-8 mm. Feeding: The processed herb lint is placed in the feeding system and supplied by a blower; Airflow web formation: Two pre-mixed materials are spread evenly into a uniform cotton web by airflow under negative pressure. Composite: Top and bottom lamination 30g / m 2 Spunbond nonwoven fabric; Heat bonding: at 145℃, hot pressing is used to shape and produce disposable straw shoe insoles with a thickness of 3±1mm.

[0031] Due to the lack of composite fibers in actual production, the product cannot be formed and cannot be obtained.

[0032] Comparative Example 2 This comparative example provides a herbal grass insole, prepared by the following method: Pretreatment: The semi-dried Ula grass is manually combed into long herbaceous fibers with a length of more than 50mm and without grass stems; Weaving: The combed herbaceous fibers are hand-woven into insole material; Composite: 70g spunbond nonwoven fabric is applied to both the top and bottom surfaces and then edged by a manual sewing machine (thickness 3±1mm).

[0033] Effect test: The herbal insoles provided in Examples 1-7 and Comparative Example 2 were tested according to GB / T33610.1-2019 Determination of deodorization performance of textiles, T / GDBX056-2022 Antibacterial textiles (AAAAAAA grade), and GB / T 24218.6-2010 Water absorption (sweat absorption) performance.

[0034] The results are as follows: As can be seen from the above examples, the herbal insoles provided by the present invention utilize specific herbal raw materials, combined with chemical fibers and airflow web forming process, to make the product structure uniform, wear-resistant and usable, with the advantages of being natural and environmentally friendly, porous and sweat-absorbing, able to reduce odors and easy to degrade, and realize industrial continuous production.

[0035] The applicant declares that the herbal insole, its preparation method, and its application are illustrated by the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions of the raw materials of the product, addition of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0036] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A method for preparing a herbal grass insole, characterized in that, The preparation method includes the following steps: Herbal raw materials are crushed to obtain herbal short fibers, which are then mixed with chemical fibers and formed into a cotton-like mixture by airflow. Non-woven fabric is then attached to the upper and lower surfaces of the cotton-like mixture and thermally bonded to obtain the herbal insole.

2. The preparation method according to claim 1, characterized in that, The herbal raw materials include any one or a combination of at least two of the following: Ula grass, rice straw, needlegrass, or sheep's beard grass, preferably a combination of Ula grass, rice straw, needlegrass, and sheep's beard grass.

3. The preparation method according to claim 1 or 2, characterized in that, The length of the herbaceous short fibers is 3-8 mm.

4. The preparation method according to any one of claims 1-3, characterized in that, The chemical fibers include PE / PP composite fibers and / or PET / PE composite fibers.

5. The preparation method according to any one of claims 1-4, characterized in that, The mass ratio of herbaceous short fibers to chemical fibers is (60-75):(25-40).

6. The preparation method according to any one of claims 1-5, characterized in that, The nonwoven fabric includes spunbond nonwoven fabric.

7. The preparation method according to any one of claims 1-6, characterized in that, The nonwoven fabric has a basis weight of 25-35 g / m². 2 .

8. The preparation method according to any one of claims 1-7, characterized in that, The temperature for heat bonding is 135-155℃; Preferably, the thickness of the herbal insole is 2-4 mm.

9. A herbal insole prepared by any one of claims 1-8.

10. The application of the herbal grass insole according to claim 9 in the preparation of disposable insoles.

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