Rare earth magnetic insole and preparation method thereof

Abstract

The invention relates to a rare earth magnetic insole and a preparation method thereof. The rare earth magnetic insole is prepared from the following raw materials in parts by mass: 80-88 parts of rare earth magnetic powder; 0.1 to 1 part of a coupling agent; 10-18 parts of silicone rubber; 0.4 to 0.8 part of a cross-linking accelerant; and 0.2-1 part of a structure regulator. According to the preparation method of the rare earth magnetic insole, the rare earth magnetic powder, the coupling agent, the silicone rubber, the cross-linking accelerant and the structure regulator are included according to a specific proportion relation, the rare earth magnetic powder has a strong and stable magnetic field, the silicone rubber has excellent low-temperature elasticity and flexibility, and the rare earth magnetic powder, the coupling agent and the silicone rubber can be chemically cross-linked and combined, so that the magnetic field of the insole is improved. Through cooperation of the crosslinking accelerator and the structure regulator, the rare earth magnetic insole has excellent magnetic performance, is soft, comfortable and durable, and has salt corrosion resistance.

Description

Technical Field

[0001] The present application relates to the field of materials, and in particular to a rare earth magnetic insole and a preparation method thereof. Background Art

[0002] In today's fast-paced modern life, people are paying more and more attention to their health. As an important supporting part of the human body, the foot bears the entire weight of the body, and its health has a vital impact on the overall physical condition.

[0003] Traditional insoles usually only have basic cushioning and support functions, which are difficult to meet people's higher demands for foot health. With the continuous advancement of science and technology, various insoles with special functions have gradually emerged, but there are still many shortcomings. In the field of magnetic insoles, although some products use ordinary magnets, the magnetic field strength and stability are insufficient, and the positive effect of the magnetic field on the human body cannot be fully exerted. Moreover, the softness and comfort of ordinary magnetic insoles are not ideal, and the magnetism of ordinary magnets may gradually weaken over time, which will affect the long-term use of the product.

[0004] Therefore, the traditional technology still needs to be further improved. Summary of the invention

[0005] Based on this, it is necessary to provide a rare earth magnetic insole having magnetic properties, softness, comfort, durability and salt corrosion resistance and a preparation method thereof. The specific scheme is as follows:

[0006] On one hand, the present application provides a rare earth magnetic insole, wherein the raw materials for preparing the rare earth magnetic insole include the following components by weight:

[0007] 80~88 parts of rare earth magnetic powder;

[0008] Coupling agent 0.1~1 part;

[0009] Silicone rubber 10~18 parts;

[0010] 0.4~0.8 parts of cross-linking accelerator;

[0011] Structural regulator 0.2~1 part.

[0012] The raw materials of the rare earth magnetic insole of the present application include rare earth magnetic powder, coupling agent, silicone rubber, cross-linking promoter and structural regulator in a specific ratio. Among them, the rare earth magnetic powder has a strong and stable magnetic field, the silicone rubber has excellent low-temperature elasticity and softness, the rare earth magnetic powder, coupling agent and silicone rubber can be chemically cross-linked, and the synergistic cross-linking promoter and structural regulator make the rare earth magnetic insole have excellent magnetic properties, softness, comfort, durability and salt corrosion resistance.

[0013] In some embodiments, the raw materials for preparing the rare earth magnetic insole include the following components by weight:

[0014] Rare earth magnetic powder 85-88 parts;

[0015] 0.5~1 part of coupling agent;

[0016] Silicone rubber 10~15 parts;

[0017] 0.4 to 0.8 parts of cross-linking accelerator;

[0018] Structural regulator 0.2~1 part.

[0019] In some embodiments, the rare earth magnetic insole satisfies at least one of the conditions (1) to (5):

[0020] (1) The rare earth magnetic powder includes one or more of samarium iron nitrogen magnetic powder and neodymium iron boron magnetic powder;

[0021] (2) The coupling agent includes one or more of γ-glycidyloxypropyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, vinyl triethoxysilane, isopropyl trioleyl phthalate and isopropyl triisostearate titanate;

[0022] (3) The silicone rubber includes methyl vinyl silicone;

[0023] (4) The crosslinking accelerator includes one or more of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, triallyl isocyanurate, trimethylolpropane triacrylate and trimethylolpropane trimethacrylate;

[0024] (5) The structure regulator includes one or more of terminal hydroxy dimethyl silicone oil, terminal vinyl dimethyl silicone oil, trimethylsiloxy-terminated dimethyl silicone oil and hydrogenated silicone oil.

[0025] In one embodiment, the front side of the rare earth magnetic insole has striped patterns, round particles, and round protrusions arranged according to acupuncture points on the sole of the human foot.

[0026] In one of the embodiments, the rare earth magnetic insole has N magnetic circuits and S magnetic circuits alternately arranged in parallel along the length direction.

[0027] In one embodiment, the rare earth magnetic insole satisfies at least one of the conditions (1) to (4):

[0028] (1) The diameter of the circular protrusion is 3 mm to 5 mm, and the height is 1.5 mm to 2.0 mm;

[0029] (2) The width of the stripe pattern is 2 mm to 2.5 mm;

[0030] (3) The diameter of the round particles is 1 mm to 1.5 mm, and the height is 0.5 mm to 0.8 mm;

[0031] (4) The widths of the N magnetic circuit and the S magnetic circuit are independently 3 mm to 10 mm.

[0032] On the other hand, the present application provides a method for preparing a rare earth magnetic insole, comprising the following steps:

[0033] The raw materials for preparing the rare earth magnetic insole are mixed and refined, and then pressed and vulcanized to obtain a semi-finished insole;

[0034] The semi-finished insole is magnetized to obtain the rare earth magnetic insole.

[0035] In one embodiment, the mixing and refining comprises the following steps:

[0036] Mixing the rare earth magnetic powder with the coupling agent to prepare pretreated rare earth magnetic powder;

[0037] The pretreated rare earth magnetic powder is mixed with the silicone rubber, the cross-linking accelerator and the structure regulator, and pressure kneading and open kneading are performed in sequence.

[0038] In one embodiment, the compression vulcanization molding comprises the following steps:

[0039] The mixed and refined materials are placed in a magnetic mold and pressed at a temperature of 150℃~180℃.

[0040] In one of the embodiments, the semi-finished insole is placed on a parallel multi-pole magnetizing plate for magnetization. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a front view of the rare earth magnetic insole prepared in Example 1;

[0042] Figure 2 This is the multipolar parallel magnetic field distribution diagram of the rare earth magnetic insole prepared in Example 1.

[0043] Description of reference numerals:

[0044] 1. Rare earth magnetic insole; 10. Round convex dots; 20. Striped pattern; 30. Round particles; 40. N magnetic circuit; 50. S magnetic circuit. DETAILED DESCRIPTION

[0045] For ease of understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application are provided. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0047] The term "comprises", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprising one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements. The indefinite articles "a kind of" and "one" before the elements or components of the present application are not restrictive to the quantity requirements (i.e., the number of occurrences) of the elements or components. Therefore, "one" or "a kind of" should be interpreted as including one or at least one, and the elements or components in the singular form also include the plural form, unless the number obviously refers only to the singular form. The meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] Except as shown in the operating examples or otherwise indicated, all numbers used in the specification and claims to indicate the amount of ingredients, physicochemical properties, etc. are understood to be adjusted by the term "about" in all cases. For example, therefore, unless otherwise indicated, the numerical parameters listed in the above specification and the attached claims are approximate values, and those skilled in the art can use the teachings disclosed herein to seek to obtain the desired properties and appropriately change these approximate values. The use of numerical ranges expressed as endpoints includes all numbers within the range and any range within the range, for example, 1 to 5 includes 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4 and 5, etc.

[0049] In traditional technology, as shown in the background technology, traditional insoles have limitations in comfort and functionality. Driven by modern technology, the pursuit of health and comfort has prompted us to continuously explore innovative materials. Rare earth magnetic materials, as a material with special properties, have broad application prospects. Technicians proposed the use of neodymium iron boron material technology, which is to embed magnets into insoles, which is regionally magnetic, and is limited by the size of the insole and the hard and brittle characteristics of neodymium iron boron magnets. Generally, the inlay size of neodymium iron boron magnets should not be too thick or too large, and the number should not be too many, so it cannot act on the entire sole of the foot, which ultimately leads to obvious limitations in wearing comfort, durability of insole surface materials, and magnetic therapy effects. However, strontium ferrite magnetic insoles are limited to the maximum magnetic energy product and actual filling rate of magnetic powder, which makes the surface magnetism of the insole low.

[0050] Based on this, see Figure 1 In one embodiment of the present application, a rare earth magnetic insole 1 is provided. The raw materials for preparing the rare earth magnetic insole 1 include the following components by weight:

[0051] 80~88 parts of rare earth magnetic powder;

[0052] Coupling agent 0.1~1 part;

[0053] Silicone rubber 10~18 parts;

[0054] 0.4~0.8 parts of cross-linking accelerator;

[0055] Structural regulator 0.2~1 part.

[0056] The raw materials of the rare earth magnetic insole 1 of the present application include rare earth magnetic powder, coupling agent, silicone rubber, cross-linking promoter and structural regulator in a specific ratio. Among them, the rare earth magnetic powder has a strong and stable magnetic field, the silicone rubber has excellent low-temperature elasticity and softness, the rare earth magnetic powder, coupling agent and silicone rubber can be chemically cross-linked, and the cross-linking promoter and structural regulator are synergistic, so that the rare earth magnetic insole has excellent magnetic properties, softness, comfort, durability and salt corrosion resistance.

[0057] It is understood that when a numerical range is disclosed herein, the above range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0058] It should be noted that the value range of rare earth magnetic powder is "80 parts to 88 parts", that is, the minimum and maximum values ​​of the range of 80 parts to 88 parts, and every value between the minimum and maximum values. Specific examples include but are not limited to the point values ​​in the embodiments and the following point values: 80 parts, 80.5 parts, 81 parts, 81.5 parts, 82 parts, 82.5 parts, 83 parts, 83.5 parts, 84 parts, 84.5 parts, 85 parts, 85.5 parts, 86 parts, 86.5 parts, 87 parts, 87.5 parts, 88 parts; or a range consisting of any two of these values.

[0059] The value range of the coupling agent is "0.1 part to 1 part", that is, the minimum and maximum values ​​of the range of 0.1 part to 1 part, and each value between the minimum and maximum values. Specific examples include but are not limited to the point values ​​in the embodiments and the following point values: 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part or 1 part; or a range consisting of any two of these values.

[0060] It can be understood that the coupling agent molecule contains two functional groups of different properties. One end can react chemically with hydroxyl, carboxyl and other groups on the surface of inorganic materials to form chemical bonds; the other end can interact with organic material molecules (such as entanglement, van der Waals force, hydrogen bond, etc.), thereby acting as a "bridge" between inorganic and organic materials and enhancing the interfacial bonding between the two.

[0061] The value range of silicone rubber is "10 parts to 18 parts", that is, the minimum and maximum values ​​of the range of 10 parts to 18 parts, and every value between the minimum and maximum values. Specific examples include but are not limited to the point values ​​in the embodiments and the following point values: 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, 14.5 parts, 15 parts, 15.5 parts, 16 parts, 16.5 parts, 17 parts, 17.5 parts or 18 parts; or a range consisting of any two of these values.

[0062] The value range of the cross-linking accelerator is "0.4 parts to 0.8 parts", that is, the minimum and maximum values ​​of the range of 0.4 parts to 0.8 parts, and each value between the minimum and maximum values. Specific examples include but are not limited to the point values ​​in the embodiments and the following point values: 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts or 0.8 parts; or a range consisting of any two of these values.

[0063] It can be understood that the role of the cross-linking accelerator is to promote the formation of cross-linking bonds between silicone rubber molecular chains. It can reduce the activation energy of the cross-linking reaction, speed up the cross-linking reaction, and enable the polymer material to form more cross-linked structures in a shorter time.

[0064] The value range of the structural regulator is "0.2 parts to 1 parts", that is, the minimum and maximum values ​​of the range of 0.2 parts to 1 parts, and each value between the minimum and maximum values. Specific examples include but are not limited to the point values ​​in the embodiments and the following point values: 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts or 1 part; or a range consisting of any two of these values.

[0065] In some embodiments, the raw materials for preparing the rare earth magnetic insole 1 include the following components by weight:

[0066] Rare earth magnetic powder 85-88 parts;

[0067] 0.5~1 part of coupling agent;

[0068] Silicone rubber 10~15 parts;

[0069] 0.4 to 0.8 parts of cross-linking accelerator;

[0070] Structural regulator 0.2~1 part.

[0071] By further controlling the ratio range of the raw materials, the magnetic properties, softness and salt corrosion resistance of the insole are improved.

[0072] In some embodiments, the rare earth magnetic powder includes one or more of samarium iron nitrogen magnetic powder and neodymium iron boron magnetic powder.

[0073] In some embodiments, the coupling agent includes one or more of γ-glycidyloxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, isopropyltrioleylphthalate and isopropyl triisostearate titanate.

[0074] In some embodiments, the silicone rubber includes methyl vinyl silicone.

[0075] In some embodiments, the crosslinking accelerator includes one or more of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, triallyl isocyanurate, trimethylolpropane triacrylate and trimethylolpropane trimethacrylate.

[0076] In some embodiments, the structure regulator includes one or more of terminal hydroxy dimethyl silicone oil, terminal vinyl dimethyl silicone oil, trimethylsiloxy-terminated dimethyl silicone oil and hydrogenated silicone oil.

[0077] It can be understood that the non-hydrolyzable organic side chain of the coupling agent used in the present application has active functional groups that can react with free radicals, specifically: unsaturated double bonds, acryloyloxy groups. The peroxide used in the present application, such as 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, generates alkoxy free radicals at the vulcanization temperature, which not only induces vinyl free radicals in silicone rubber, but also induces the coupling agent used in the present invention to generate free radicals, and finally cross-links with each other to form a strong chemical structure, so that the rare earth magnetic powder and silicone rubber are more compatible, and the salt corrosion resistance of the rare earth magnetic powder and the fatigue strength of the magnetic insole are further improved.

[0078] See also Figure 1 The front side of the rare earth magnetic insole 1 has striped patterns 20, round particles 30 and round protrusions 10 arranged according to the acupuncture points on the sole of the human body.

[0079] See also Figure 2 The rare earth magnetic insole 1 has N magnetic circuits 40 and S magnetic circuits 50 alternately arranged in parallel along the length direction.

[0080] In some embodiments, the circular protrusion 10 has a diameter of 3 mm to 5 mm and a height of 1.5 mm to 2.0 mm.

[0081] In some embodiments, the width of the strip pattern 20 is 2 mm to 2.5 mm.

[0082] In some embodiments, the diameter of the round particles 30 is 1 mm to 1.5 mm, and the height is 0.5 mm to 0.8 mm.

[0083] In some of the embodiments, the widths of the N magnetic circuit 40 and the S magnetic circuit 50 are independently 3 mm to 10 mm.

[0084] It can be understood that in terms of the surface design of the above-mentioned insole, the unique 3D pattern design arranges 47 circular protrusions 10 with a diameter of 3mm~4mm according to the acupuncture points on the soles of the human body, which can stimulate the acupuncture points, promote blood circulation, and relieve tension in the tendons; the 2mm~2.5mm wide strip pattern 20 structure has a reinforcing function in the stretching direction of the insole, and combined with the small round particles 30 with a diameter of 1mm~1.5mm, it can increase the ventilation, breathability and comfort of the soles of the feet.

[0085] Another embodiment of the present application further provides a method for preparing a rare earth magnetic insole 1, comprising steps S10 to S20.

[0086] Step S10: The raw materials for preparing the rare earth magnetic insole 1 are mixed and refined, and then pressed and vulcanized to obtain a semi-finished insole.

[0087] Specifically, the mixing and refining step in step S10 includes step a to step b.

[0088] Step a: Mix the rare earth magnetic powder and the coupling agent to prepare pretreated rare earth magnetic powder.

[0089] Step b: mixing the pretreated rare earth magnetic powder with the silicone rubber, the cross-linking accelerator and the structure regulator, and performing pressurized internal kneading and open kneading in sequence.

[0090] In some embodiments, the pressure of the pressure mixing treatment is 0.4 MPa to 0.6 MPa, and the time of the pressure mixing treatment is 30 min to 60 min.

[0091] Specifically, the compression vulcanization molding comprises the following steps: placing the mixed and refined materials in a magnetic mold and performing compression treatment at a temperature of 150° C. to 180° C.

[0092] It is understood that when a numerical range is disclosed herein, the above range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0093] The temperature of the pressing treatment ranges from "150°C to 180°C", that is, the minimum and maximum values ​​in the range of 150°C to 180°C, and every value between the minimum and maximum values. Specific examples include, but are not limited to, the point values ​​in the embodiments and the following point values: 150°C, 150.5°C, 151°C, 151.5°C, 152°C, 152.5°C, 153°C, 153.5°C, 154°C, 154.5°C, 155°C, 155.5°C, 156°C, 156.5°C, 157°C, 157.5°C, 158°C, 158.5°C, 159°C, 159.5°C, 160°C, 160.5°C, 161°C, 161.5°C, 162°C, 162.5°C, 163°C, 163.5°C, 164°C, 164.5°C , 165°C, 165.5°C, 166°C, 166.5°C, 167°C, 167.5°C, 168°C, 168.5°C, 169°C, 169.5°C, 170°C, 170.5°C, 171°C, 171.5°C, 172°C, 172.5°C, 173°C, 173.5°C, 174°C, 174.5°C, 175°C, 175.5°C, 176°C, 176.5°C, 177°C, 177.5°C, 178°C, 178.5°C, 179°C, 179.5°C or 180°C; or a range consisting of any two of these values.

[0094] Step S20: magnetizing the semi-finished insole to obtain the rare earth magnetic insole 1.

[0095] In some of the embodiments, the semi-finished insole is placed on a parallel multi-polar magnetizing plate for magnetization.

[0096] After the rare earth magnetic powder and silicone rubber are evenly kneaded in the present invention, the rare earth magnetic powder is orderly arranged along the magnetic field direction during the inner mold pressing process of a magnetic mold, so that the microscopic easy magnetization axis of the rare earth magnetic powder is parallel to the magnetization direction, which is more conducive to the magnetic properties of the rare earth magnetic powder. Compared with the non-magnetic field molding technology, the present invention can achieve a thinner and lighter insole when the surface magnetism is equivalent, and the insole is softer and more comfortable to wear, has a higher fit with the sole of the foot, and has a good massage magnetic therapy effect.

[0097] The present application will be described below in conjunction with specific embodiments, but the present application is not limited to the following embodiments. It should be understood that the attached claims summarize the scope of the present application. Under the guidance of the concept of the present application, technical personnel in the field should realize that certain changes made to the various embodiments of the present application will be covered by the spirit and scope of the claims of the present application.

[0098] The raw materials involved in the following specific embodiments, unless otherwise specified, can all be sourced from commercial sources. The instruments used, unless otherwise specified, can all be sourced from commercial sources. The processes involved, unless otherwise specified, are all routinely selected by those skilled in the art.

[0099] Among them, the test density of SmFeN magnetic powder is 4.0~4.1g / cm 3 , Br is 4800~5300Gs, Hcb is 3700~4100Oe, Hcj is 6000~7500Oe, BHM is 4.5~5.5MGOe; the test density of NdFeB magnetic powder is 7.6~7.7g / cm 3 , Br is 8800~9300Gs, Hcb is 5700~6800Oe, Hcj is 7500~9000Oe, and BHM is 15.20~16.30MGOe.

[0100] Example 1

[0101] (1) Add 80 parts of samarium iron nitrogen magnetic powder and 0.2 parts of γ-glycidyloxypropyl trimethoxysilane into a high-speed mixer, stir and mix for 20 minutes, and then discharge the material to obtain pretreated rare earth magnetic powder for later use.

[0102] (2) The pretreated rare earth magnetic powder obtained in step (1) was mixed with 18 parts of methyl vinyl silica gel, 0.4 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 0.1 parts of terminal hydroxy dimethyl silicone oil and 0.1 parts of terminal vinyl dimethyl silicone oil, and added to an internal mixer, and the mixture was pressurized and mixed for 30 minutes while passing cooling water.

[0103] (3) Cut the kneaded material into small pieces and cool for 2 hours.

[0104] (4) Add the cooled material to the mixing mill, process the material and wrap it on the front roller, and adjust the roller distance to make the material reach the appropriate thickness.

[0105] (5) After the surface of the material becomes sufficiently soft and shiny, cut the material into slices and set aside.

[0106] (6) After the semi-finished material is cut into suitable sizes, it is placed in a mold embedded with a strong magnet and pressed and vulcanized at 150°C to obtain a rare earth magnetic insole semi-finished product.

[0107] (7) The surface of the rare earth magnetic insole semi-finished product is spray-coated. After the coating is dried, the patterned surface is placed on a parallel multi-pole magnetizing plate with a magnetic circuit width of 5 mm for magnetization to obtain a rare earth magnetic insole.

[0108] (8) The prepared rare earth magnetic insole was subjected to the following performance tests.

[0109] Example 2

[0110] (1) Add 60 parts of samarium iron nitrogen magnetic powder, 25 parts of neodymium iron boron magnetic powder and 0.5 parts of γ-(methacryloyloxy)propyltrimethoxysilane into a high-speed mixer, stir and mix for 30 minutes, and then discharge the material to obtain pretreated rare earth magnetic powder for later use.

[0111] (2) The pretreated rare earth magnetic powder obtained in step (1) and 15 parts of methyl vinyl silica gel, 0.4 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 0.4 parts of triallyl isocyanurate, 0.5 parts of terminal hydroxy dimethyl silicone oil, and 0.5 parts of trimethylsiloxy-terminated dimethyl silicone oil are added to an internal mixer and pressurized and kneaded for 40 minutes while passing cooling water.

[0112] (3) Cut the kneaded material into small pieces and cool for 3 hours.

[0113] (4) Add the cooled material to the mixing mill, process the material and wrap it on the front roller, and adjust the roller distance to make the material reach the appropriate thickness.

[0114] (5) After the surface of the material becomes sufficiently soft and shiny, cut the material into slices and set aside.

[0115] (6) After the semi-finished sheet of the material is cut into suitable sizes, it is placed in a mold embedded with a strong magnet and pressed and vulcanized at 160°C to obtain a semi-finished rare earth magnetic insole.

[0116] (7) The surface of the rare earth magnetic insole semi-finished product is spray-coated. After the coating is dried, the patterned surface is placed on a parallel multi-pole magnetizing plate with a magnetic circuit width of 7 mm for magnetization to obtain a rare earth magnetic insole.

[0117] (8) The prepared rare earth magnetic insole is subjected to performance testing.

[0118] Example 3

[0119] (1) Add 35 parts of samarium iron nitrogen magnetic powder, 53 parts of neodymium iron boron magnetic powder and 1 part of vinyl triethoxysilane into a high-speed mixer, stir and mix for 30 minutes, and then discharge the material to obtain pretreated rare earth magnetic powder for use.

[0120] (2) The pretreated rare earth magnetic powder obtained in step (1) and 10 parts of methyl vinyl silica gel, 0.4 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 0.4 parts of trimethylolpropane triacrylate, 0.5 parts of terminal hydroxy dimethyl silicone oil, and 0.5 parts of hydrogenated silicone oil are added to an internal mixer and pressurized and mixed for 60 minutes while passing cooling water.

[0121] (3) Cut the kneaded material into small pieces and cool for 6 hours.

[0122] (4) Add the cooled material to the mixing mill, process the material and wrap it on the front roller, and adjust the roller distance to make the material reach the appropriate thickness.

[0123] (5) After the surface of the material becomes sufficiently soft and shiny, cut the material into slices and set aside.

[0124] (6) After the semi-finished material is cut into suitable sizes, it is placed in a mold embedded with a strong magnet and pressed and vulcanized at 180°C to obtain a rare earth magnetic insole semi-finished product.

[0125] (7) The surface of the rare earth magnetic insole semi-finished product is spray-coated. After the coating is dried, the patterned surface is placed on a parallel multi-pole magnetizing plate with a magnetic circuit width of 7 mm for magnetization to obtain a rare earth magnetic insole.

[0126] (8) The prepared rare earth magnetic insole is subjected to performance testing.

[0127] The preparation methods of the rare earth magnetic insoles of Example 4 and Example 1 are basically the same, the only difference is that the amount of raw materials used in the preparation of the rare earth magnetic insoles is different, wherein the specific parameters are shown in Table 1 below.

[0128] The preparation methods of the rare earth magnetic insoles of Comparative Examples 1-2 are substantially the same as those of Example 1, except that the amounts of raw materials used in preparing the rare earth magnetic insoles are different, and the specific parameters are shown in Table 1 below.

[0129] Test method:

[0130] 1. Rare earth magnetic insole density test

[0131] Specific implementation of GB / T 1033.1-2008 standard requirements.

[0132] 2. Rare earth magnetic insole weight test

[0133] Specifically, the insole is directly placed on an electronic scale to measure and read the weight (g).

[0134] 3. Surface magnetic test of rare earth magnetic insoles

[0135] Specifically, a Gaussmeter probe is placed in close contact with the surface of the insole and slowly moved to read the surface magnetic values ​​of multiple positions of the insole, recording the range of the highest value.

[0136] 4. Rare earth magnetic insole tensile strength test

[0137] Specific implementation of GB / T 528-2009 standard requirements.

[0138] 5. Shore hardness test of rare earth magnetic insoles

[0139] Specific implementation of GB / T 531.1-2008 standard requirements.

[0140] 6. Neutral salt spray test of rare earth magnetic insoles

[0141] Specific implementation of GB / T 2423.17-2008 standard requirements.

[0142] 7. Rare earth magnetic insole bending fatigue test

[0143] Specifically implement the requirements of GB / T 1687.4-2021 standard.

[0144] Table 1

[0145]

[0146] Note: “ / ” means the component does not exist.

[0147] Figure 1 This is a front view of the rare earth magnetic insole prepared in Example 1. Figure 2The multipolar parallel magnetic field distribution diagram of the rare earth composite magnetic material prepared in Example 1, the magnetic insole is formed by blending rare earth magnetic powder and silicone rubber, the insole material has good consistency, and the multipolar parallel magnetic field distributes the entire insole. The density, weight, surface magnetism, tensile strength, elongation at break, Shore hardness, 72-hour neutral salt spray test and bending fatigue resistance test results of the rare earth magnetic insoles in Examples 1 to 4 and Comparative Examples 1 to 2 are shown in Table 1. It can be seen that the rare earth magnetic insoles prepared in the embodiments of the present application are better than those prepared in the comparative examples in terms of magnetic properties, softness, durability and salt corrosion resistance. According to the design of the acupuncture points on the soles of the human body, 47 circular convex points with a diameter of 3mm to 4mm, striped pattern structures with a width of 2mm to 2.5mm and round particles with a diameter of 1mm to 1.5mm are arranged, which not only makes the insole soft, comfortable and durable, but also has a good massage magnetic therapy effect, which helps to promote blood circulation in the soles and relieve fatigue.

[0148] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0149] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be based on the attached claims.

Claims

1. A rare earth magnetic insole, characterized in that: The raw materials for preparing the rare earth magnetic insole include the following components by mass: Rare earth magnetic powder 80~88 parts; Coupling agent 0.1~1 part; Silicone rubber 10~18 parts; 0.4 to 0.8 parts of cross-linking accelerator; Structural regulator 0.2~1 part.

2. The rare earth magnetic insole according to claim 1, characterized in that: The raw materials for preparing the rare earth magnetic insole include the following components by mass: Rare earth magnetic powder 85-88 parts; 0.5~1 part of coupling agent; Silicone rubber 10~15 parts; 0.4 to 0.8 parts of cross-linking accelerator; Structural regulator 0.2~1 part.

3. The rare earth magnetic insole according to claim 1, characterized in that: The rare earth magnetic insole satisfies at least one of the conditions (1) to (5): (1) The rare earth magnetic powder includes one or more of samarium iron nitrogen magnetic powder and neodymium iron boron magnetic powder; (2) The coupling agent includes one or more of γ-glycidyloxypropyl trimethoxysilane, γ-methacryloxypropyl trimethoxysilane, vinyl triethoxysilane, isopropyl trioleyl phthalate and isopropyl triisostearate titanate; (3) The silicone rubber includes methyl vinyl silicone; (4) The crosslinking accelerator includes one or more of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, triallyl isocyanurate, trimethylolpropane triacrylate and trimethylolpropane trimethacrylate; (5) The structure regulator includes one or more of terminal hydroxy dimethyl silicone oil, terminal vinyl dimethyl silicone oil, trimethylsiloxy-terminated dimethyl silicone oil and hydrogenated silicone oil.

4. The rare earth magnetic insole according to any one of claims 1 to 3, characterized in that: The front side of the rare earth magnetic insole is provided with striped patterns, round particles and round convex points arranged according to acupuncture points on the soles of human feet.

5. The rare earth magnetic insole according to claim 4, characterized in that: The rare earth magnetic insole has N magnetic circuits and S magnetic circuits alternately arranged in parallel along the length direction.

6. The rare earth magnetic insole according to claim 5, characterized in that: The rare earth magnetic insole satisfies at least one of the conditions (1) to (4): (1) The diameter of the circular protrusion is 3 mm to 5 mm, and the height is 1.5 mm to 2.0 mm; (2) The width of the stripe pattern is 2 mm to 2.5 mm; (3) The diameter of the round particles is 1 mm to 1.5 mm, and the height is 0.5 mm to 0.8 mm; (4) The widths of the N magnetic circuit and the S magnetic circuit are independently 3 mm to 10 mm.

7. A method for preparing a rare earth magnetic insole, characterized in that: The following steps are involved: The raw materials for preparing the rare earth magnetic insole according to any one of claims 1 to 6 are mixed and refined, and then pressed and vulcanized to obtain a semi-finished insole; The semi-finished insole is magnetized to obtain the rare earth magnetic insole.

8. The method for preparing the rare earth magnetic insole according to claim 7, characterized in that: The mixing and refining process comprises the following steps: Mixing the rare earth magnetic powder with the coupling agent to prepare pretreated rare earth magnetic powder; The pretreated rare earth magnetic powder is mixed with the silicone rubber, the cross-linking accelerator and the structure regulator, and pressure kneading and open kneading are performed in sequence.

9. The method for preparing the rare earth magnetic insole according to claim 7, characterized in that: The compression vulcanization molding comprises the following steps: The mixed and refined materials are placed in a magnetic mold and pressed at a temperature of 150℃~180℃.

10. The method for preparing the rare earth magnetic insole according to any one of claims 7 to 9, characterized in that: The semi-finished insole is placed on a parallel multi-pole magnetizing plate for magnetization.

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