Composite permanent magnet material and non-magnetic block magnetic attraction false eyelash

Abstract

The invention relates to the technical field of flexible magnetic materials, in particular to a composite permanent magnet material and a non-magnetic-block magnetic attraction false eyelash, the composite permanent magnet material is good in magnetism, and the non-magnetic-block magnetic attraction false eyelash made of the composite permanent magnet material is more comfortable and simpler to wear by women while the magnetic attraction function is guaranteed. According to the magnetic eyelash, the problem that magnet blocks need to be manually added to the original magnetic eyelashes to achieve the purpose of magnetic absorption of the eyelashes is solved, the softness of eyelash stalk lines is improved, the cost can be effectively controlled, the wearing comfort of the eyelashes is greatly improved, the user experience is effectively improved, the requirements of the market for innovative and safe cosmetic products are met, and the magnetic eyelashes have good market prospects.

Description

Technical Field

[0001] The invention relates to the technical field of flexible magnetic materials, and in particular to a composite permanent magnetic material and magnetic false eyelashes without magnetic blocks. Background Art

[0002] False eyelashes are artificial eyelashes used to beautify the eyes. By lengthening and thickening the original eyelashes, the eyes look bigger, brighter, fuller and more energetic. In recent years, in order to meet the needs of the market and the user's desire for easy wearing, magnetic false eyelashes have emerged.

[0003] As mentioned in the background technology of the Chinese invention patent with the document number CN116250665A, the existing magnetic false eyelashes mainly include two categories, including: mainly through the combination of sheet eyelashes with magnetic elements provided with hard magnetic blocks and magnetic eyeliner liquid to achieve wearing, or, through the upper and lower two hard magnetic blocks, the soft magnetic block eyelashes are magnetically adsorbed and connected from the upper line of the real eyelashes to achieve wearing, but when wearing through the magnetic eyeliner liquid, the hard magnetic block increases the weight of the eyelashes, the hard magnetic block directly contacts the skin and is uncomfortable to wear. At the same time, the eyeliner liquid requires high makeup skills of the user, and after use, makeup removal and cleaning are required. The use steps are cumbersome, and the contact of the magnetic liquid with the skin increases the allergy rate. Therefore, the double-layer magnetic eyelashes worn by the upper and lower magnetic adsorption have received more extensive attention and application. The disadvantages of the existing upper and lower two-piece suction eyelashes are 1: the magnetic eyelashes of the hard magnetic block have strong magnetism, but the magnetic block is easy to fall off, and the weight of the hard magnetic block will cause serious damage to the eyelashes themselves, 2: the magnetic eyelashes of the soft magnetic block are easy to break, the magnetic property is poor, and the yield of the soft magnetic eyelashes is low, which is unacceptable to many women.

[0004] The Chinese invention patent application with the document number CN116250665A also proposed a double-layer magnetic eyelash ornament, which includes a first eyelash piece and a second eyelash piece. By setting a hard magnet unit on the first eyelash piece and a magnetic conductive sheet on the second eyelash piece, when in use, the magnetic attraction between the hard magnet unit and the flexible magnetic conductive sheet can achieve the purpose of improving the wearing effect and wearing comfort of the double-layer magnetic eyelash ornament. Just like the technical solution disclosed in the patent, at present, such double-layer magnetic eyelash ornaments generally use hard magnet units to achieve magnetic wearing, and the hard magnet units are connected to the false eyelash body by gluing during the processing process. The convenience of using such magnetic eyelashes is mainly determined by the size and number of the hard magnet units, for example:

[0005] If the hard magnetic unit is too large, its own weight will cause damage to the eyelashes and cause them to fall off. If the hard magnetic unit is small, it will be more comfortable, but the production difficulty will increase, resulting in higher product costs. At the same time, the hard magnetic unit has a small contact area and weak suction, making it easy to fall off when worn.

[0006] Currently known magnetic false eyelashes generally contain multiple hard magnetic units. By increasing the number of hard magnetic units, the magnetic contact area when worn is increased. However, due to the weight and dense coverage of the hard magnetic units themselves, the originally soft cotton false eyelash stems lose their softness. In addition, in order to prevent the false eyelashes from falling off during wearing, such magnetic false eyelashes can only be used for lighter and thinner styles, which greatly limits the user's choice.

[0007] Therefore, how to solve the aforementioned technical problems and provide a magnetic false eyelashes that is more comfortable and safer to wear is a problem that needs to be solved urgently. Summary of the invention

[0008] In order to solve the above technical problems, the purpose of the present invention is to provide a composite permanent magnetic material and a magnetic false eyelash without a magnetic block containing the composite permanent magnetic material. The composite permanent magnetic material has good magnetic properties, low cost, and is easy to process. At the same time, based on the above composite permanent magnetic material, the present invention also provides a magnetic false eyelash without a magnetic block.

[0009] The magnetic false eyelashes without magnetic blocks made of composite permanent magnetic material have good magnetic properties. While ensuring the magnetic adsorption function, it is more comfortable and simple for women to wear. The original magnetic eyelashes need to add magnetic blocks manually to achieve the purpose of magnetic eyelashes. The present invention increases the softness of the eyelash stem line and can effectively control the cost, greatly improving the comfort of wearing, effectively improving the user experience, meeting the market demand for innovative and safe cosmetic products, and has a good market prospect.

[0010] In order to achieve the above technical effects, the present invention adopts the following technical solutions:

[0011] In a first aspect, the present invention provides a composite permanent magnet material, which includes the following raw materials in parts by mass: 15 to 25 parts of pre-modified ferrite powder, 50 to 75 parts of neodymium iron boron powder, 1 to 5 parts of coupling agent, 8 to 12 parts of resin matrix, 3 to 5 parts of filler, 0.1 to 0.5 parts of curing agent and 0.8 to 1.4 parts of lubricant.

[0012] Preferably, the coupling agent is any one of a silane coupling agent or a titanate coupling agent, wherein the silane coupling agent is any one or more of KH550 and KH560, and the titanate coupling agent is any one or more of NDZ-101 and NDZ-201;

[0013] Preferably, the filler is selected from any one or more of silicon dioxide powder, silicon nitride powder, aluminum silicate powder, calcium silicate powder, calcium carbonate powder and barium acid powder;

[0014] Preferably, the curing agent is any one or more of benzoyl peroxide or dibutyltin dilaurate;

[0015] Preferably, the lubricant is any one or more of magnesium stearate, zinc stearate, stearic acid or paraffin.

[0016] Furthermore, the resin matrix is ​​a mixture of any one or more of styrene-butadiene rubber SBR, thermoplastic polyurethane elastomer TPU, styrene-butadiene-styrene block copolymer SBS, and epoxy resin.

[0017] In a second aspect, the present invention further provides a method for preparing a composite permanent magnetic material, comprising the steps of:

[0018] S1: modifying ferrite magnetic powder as a raw material to prepare pre-modified ferrite magnetic powder; and uniformly mixing the pre-modified ferrite magnetic powder and NdFeB magnetic powder to obtain mixed magnetic powder;

[0019] S2: slowly add the coupling agent to the mixed magnetic powder, start the high-speed stirrer at the same time, and stir at a speed of 300-500 rpm for 1-2 hours to make the coupling agent evenly coated on the surface of the mixed magnetic powder particles;

[0020] S3: first pour the resin matrix into a stirring container, keep stirring at a low speed, and at the same time add the mixed magnetic powder coated with the coupling agent into the resin matrix glue, add the curing agent, and control the stirring speed at 300 to 800 rpm to obtain a mixed system;

[0021] S4: transferring the mixed system to an ultrasonic disperser and performing ultrasonic dispersion treatment for 10 to 50 minutes to prepare a magnetic colloid.

[0022] Furthermore, the method for preparing the composite permanent magnetic material also includes the step of solidifying the prepared magnetic colloid.

[0023] Preferably, the method for preparing the composite permanent magnetic material further comprises the step of: thermally curing or photocuring the prepared magnetic colloid.

[0024] Furthermore, in the aforementioned step S1, the preparation method of the pre-modified ferrite magnetic powder is:

[0025] The ferrite magnetic powder is calcined at 1000-1100° C. for 4-6 hours, and after cooling to room temperature, the ferrite magnetic powder is ground using a ball mill for 6-8 hours, and modified using a chemical modification solution method, wherein the chemical modification solution contains at least an alkane coupling agent;

[0026] Preferably, the chemical modification solution comprises the following raw materials in parts by weight: 0.5-2 parts of sodium dodecylbenzene sulfonate, 2-5 parts of aluminum nitrate, 1-3 parts of zinc nitrate, 2-6 parts of polyvinyl alcohol, 2-4 parts of polymethyl methacrylate, 2-5 parts of silane coupling agent and 70-80 parts of water.

[0027] In a third aspect, the present invention also provides an application of a composite permanent magnetic material in cosmetics and beauty products, especially wearable cosmetics and beauty products.

[0028] In a fourth aspect, the present invention particularly provides a magnetic false eyelash without a magnetic block, which comprises at least one magnetic component and a simulated hair part attached to the magnetic component, and the magnetic component is partially or completely made of the composite permanent magnetic material provided in the first aspect.

[0029] Preferably, the magnetic false eyelashes without magnetic blocks provided by the present invention include: an upper simulated eyelash piece and a lower simulated eyelash piece, each of which includes a stem line and a simulated hair part attached thereto; the stem line is partially or completely made of the composite permanent magnetic material provided by the first aspect mentioned above.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] First, the present invention provides a composite permanent magnetic material, the pre-modified ferrite powder is matched with NdFeB powder, and the ferrite is added to the system in small amounts after pre-modification to provide a certain magnetic basis; a small amount of 3000 mesh NdFeB powder is used to improve the overall magnetic properties, taking into account both cost and performance. In the processing of ferrite powder, calcination improves the crystal structure of ferrite powder and improves magnetic properties; ball milling controls particle size, which is conducive to subsequent dispersion and mixing; chemical modification solution method modification, especially specific formula solution, further optimizes surface properties and enhances compatibility with other components, so that the magnetic colloid obtained has good uniformity and stability.

[0032] At the same time, the present invention provides a magnetic false eyelash without a magnetic block, in which the magnetic false eyelash without a magnetic block is at least partially or completely made of the composite permanent magnetic material provided by the first aspect. Compared with the processing method of adding hard magnets by manual operation, the processing method of the composite permanent magnetic material is simple and easy. In the magnetic false eyelash without a magnetic block, the cost can be controlled while ensuring the magnetic adsorption function. At the same time, since the composite permanent magnetic material has good stability and uniformity, in subsequent processing, the magnetic properties and mechanical properties of the false eyelashes can be ensured to be uniform, and the softness of the eyelash stem line is increased, so that the comfort of wearing is greatly improved, and the suction force is strong and not easy to fall off.

[0033] Finally, the present invention uses composite permanent magnetic materials in the false eyelash stems. Compared with traditional adhesive false eyelashes and hard magnetic false eyelashes, the magnetic false eyelashes without magnetic blocks provided by the present invention are more convenient, hygienic, and reusable, reduce the irritation of glue to the eyes, improve user experience, and are softer to wear, thus meeting the market demand for innovative and safe cosmetic products and having good market prospects. DETAILED DESCRIPTION

[0034] The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention. The specific embodiments listed in the present invention are only examples of the present invention, and the present invention is not limited to the specific embodiments described below. For those skilled in the art, any equivalent modifications and substitutions to the embodiments described below are also within the scope of the present invention. Therefore, equal transformations and modifications made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. In order to better illustrate the present invention, numerous specific details are given in the specific embodiments below. Those skilled in the art should understand that the present invention can also be implemented without certain specific details. In other embodiments, methods, means, equipment and steps well known to those skilled in the art are not described in detail in order to highlight the purport of the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those of ordinary skill in the art. Unless otherwise specified, the units used in this specification are international standard units, and the numerical values ​​and numerical ranges appearing in the present invention should be understood to include inevitable systematic errors in industrial production. Unless otherwise specified, the experimental methods used in the following implementations are all conventional methods; the materials, reagents or instruments used without indicating the manufacturer are all reagents and materials available from commercial channels. Those without indicating specific conditions in the examples are all carried out according to conventional conditions or conditions recommended by the manufacturer. At the same time, the present invention does not limit the source of the raw materials used. Unless otherwise specified, the raw materials used in the present invention are all common commercial products in the field of this technology.

[0036] It should be noted that the raw materials and equipment used in the specific embodiments of the present invention are all known products, which are obtained by purchasing commercial products. Among them, the preparation process of the modern Chinese medicine preparation made from the Chinese medicine composition of the present invention is mature and can be prepared by referring to the conventional methods of the prior art.

[0037] Example 1

[0038] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0039] 1.1 Preparation of pre-modified ferrite powder

[0040] Here’s how:

[0041] The ferrite powder was calcined at 1100°C for 6 hours, and after cooling to room temperature, the ferrite powder was ground using a ball mill for 7 hours; a chemical modification solution was prepared according to the following mass fractions:

[0042] 1 part of sodium dodecylbenzene sulfonate, 3 parts of aluminum nitrate, 2 parts of zinc nitrate, 5 parts of polyvinyl alcohol, 3 parts of polymethyl methacrylate, 3 parts of silane coupling agent KH550 and 75 parts of water;

[0043] The above chemical modification solution is used to modify the ground ferrite magnetic powder. The specific method is as follows:

[0044] Weigh the raw materials according to their mass fractions and mix them, heat to 80-90° C. with stirring, maintain the temperature and stir for 1-2 hours, cool to 40-50° C. after the reaction is completed, and adjust the pH value of the solution to 5.

[0045] The calcined and ground ferrite powder is added to the pretreated chemical modification solution, stirred under nitrogen protection, reacted at 45°C for 3 to 5 hours, and the stirring speed is controlled at 400 rpm to allow the powder to fully contact and react with the solution. Each component in the chemical modification solution can be adsorbed or bonded on the surface of the ferrite powder. After the reaction is completed, the ferrite powder is separated, washed with a solvent for multiple times to remove unreacted coupling agent and impurities, and dried to obtain the pre-modified ferrite powder.

[0046] 1.2 Preparation of composite permanent magnetic materials

[0047] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite magnetic powder, and the specific method is as follows:

[0048] The composite permanent magnetic material comprises the following raw materials in parts by weight:

[0049] 15 parts of pre-modified ferrite magnetic powder, 60 parts of neodymium iron boron magnetic powder, 3 parts of coupling agent KH550, 11 parts of NDZ-10, 3 parts of thermoplastic polyurethane elastomer TPU, 9 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0050] The preparation method of the composite permanent magnetic material is as follows:

[0051] S1: uniformly mixing the prepared pre-modified ferrite magnetic powder and NdFeB magnetic powder to obtain mixed magnetic powder;

[0052] S2: slowly add the coupling agent to the mixed magnetic powder, turn on the high-speed stirrer, and stir at a speed of 400 rpm for 1.5 hours to make the coupling agent evenly coated on the surface of the mixed magnetic powder particles;

[0053] S3: first pour the resin matrix into a stirring container, keep stirring at a low speed, and at the same time add the mixed magnetic powder coated with the coupling agent into the resin matrix glue, add the curing agent, and control the stirring speed at 600 rpm to obtain a mixed system;

[0054] S4: The mixed system is transferred to an ultrasonic disperser and subjected to ultrasonic dispersion treatment for 30 minutes to prepare a magnetic colloid.

[0055] Example 2

[0056] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0057] 2.1 Preparation of pre-modified ferrite powder

[0058] The difference from Example 1 is that the chemically modified solution is formulated as follows:

[0059] 1 part of sodium dodecylbenzene sulfonate, 5 parts of aluminum nitrate, 5 parts of polyvinyl alcohol, 3 parts of polymethyl methacrylate, 3 parts of silane coupling agent KH550 and 75 parts of water;

[0060] The ground ferrite magnetic powder was modified using the above chemical modification solution, and the modification operation was the same as in Example 1.

[0061] 2.2 Preparation of composite permanent magnetic materials

[0062] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite powder, and the specific method is the same as that in Example 1.

[0063] Example 3

[0064] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0065] 3.1 Preparation of pre-modified ferrite powder

[0066] The difference from Example 1 is that the chemically modified solution is formulated as follows:

[0067] 1 part of sodium dodecylbenzene sulfonate, 5 parts of zinc nitrate, 5 parts of polyvinyl alcohol, 3 parts of polymethyl methacrylate, 3 parts of silane coupling agent KH550 and 75 parts of water;

[0068] The ground ferrite magnetic powder was modified using the above chemical modification solution, and the modification operation was the same as in Example 1.

[0069] 3.2 Preparation of composite permanent magnetic materials

[0070] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite powder, and the specific method is the same as that in Example 1.

[0071] Example 4

[0072] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0073] 4.1 Preparation of pre-modified ferrite powder

[0074] The same as Example 1, including the chemical modification solution composition and the specific modification method.

[0075] 4.2 Preparation of composite permanent magnetic materials

[0076] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite magnetic powder, and the specific method is as follows:

[0077] Different from the first embodiment, the composite permanent magnetic material provided in this embodiment includes the following raw materials in parts by weight:

[0078] 60 parts of pre-modified ferrite magnetic powder, 15 parts of neodymium iron boron magnetic powder, 4 parts of coupling agent KH550, 3 parts of thermoplastic polyurethane elastomer TPU, 9 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0079] Example 5

[0080] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0081] 5.1 Preparation of pre-modified ferrite powder

[0082] The same as Example 1, including the chemical modification solution composition and the specific modification method.

[0083] 5.2 Preparation of composite permanent magnetic materials

[0084] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite magnetic powder, and the specific method is as follows:

[0085] Different from the first embodiment, the composite permanent magnetic material provided in this embodiment includes the following raw materials in parts by weight:

[0086] 60 parts of pre-modified ferrite magnetic powder, 15 parts of neodymium iron boron magnetic powder, 14 parts of coupling agent NDZ-10, 3 parts of thermoplastic polyurethane elastomer TPU, 9 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0087] Example 6

[0088] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0089] 6.1 Preparation of pre-modified ferrite powder

[0090] The same as Example 1, including the chemical modification solution composition and the specific modification method.

[0091] 6.2 Preparation of composite permanent magnetic materials

[0092] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite magnetic powder, and the specific method is as follows:

[0093] Different from the first embodiment, the composite permanent magnetic material provided in this embodiment includes the following raw materials in parts by weight:

[0094] 60 parts of pre-modified ferrite magnetic powder, 15 parts of neodymium iron boron magnetic powder, 3 parts of coupling agent KH550, 11 parts of NDZ-10, 1 part of thermoplastic polyurethane elastomer TPU, 11 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0095] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0096] Example 7

[0097] This embodiment provides a pre-modified ferrite magnetic powder and a composite permanent magnetic material prepared using the modified ferrite magnetic powder;

[0098] 7.1 Preparation of pre-modified ferrite powder

[0099] The same as Example 1, including the chemical modification solution composition and the specific modification method.

[0100] 7.2 Preparation of composite permanent magnetic materials

[0101] The composite permanent magnetic material is prepared based on the aforementioned pre-modified ferrite magnetic powder, and the specific method is as follows:

[0102] Different from the first embodiment, the composite permanent magnetic material provided in this embodiment includes the following raw materials in parts by weight:

[0103] 60 parts of pre-modified ferrite magnetic powder, 15 parts of neodymium iron boron magnetic powder, 3 parts of coupling agent KH550, 11 parts of NDZ-101, 5 parts of thermoplastic polyurethane elastomer TPU, 7 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0104] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0105] Comparative Example 1

[0106] This comparative example provides a modified ferrite magnetic powder and a composite permanent magnetic material prepared by using the modified ferrite magnetic powder. Compared with Example 1, the preparation method of the modified ferrite magnetic powder only performs calcination and grinding, and does not perform chemical modification operations.

[0107] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0108] Comparative Example 2

[0109] This comparative example provides a composite permanent magnetic material, the components of which are as follows:

[0110] 75 parts of neodymium iron boron magnetic powder, 3 parts of coupling agent KH550, 11 parts of NDZ-10, 3 parts of thermoplastic polyurethane elastomer TPU, 9 parts of styrene-butadiene-styrene block copolymer SBS, 3 parts of nano silicon dioxide powder, 0.4 parts of benzoyl peroxide and 1.2 parts of stearic acid.

[0111] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0112] Comparative Example 3

[0113] This comparative example provides a modified ferrite magnetic powder and a composite permanent magnetic material prepared by using the modified ferrite magnetic powder. The preparation method of the modified ferrite magnetic powder is the same as that of Example 1 in terms of calcination and ball milling. The formula of the chemically modified solution is as follows:

[0114] 1 part of sodium dodecylbenzene sulfonate, 3 parts of aluminum nitrate, 2 parts of zinc nitrate, 8 parts of polyvinyl alcohol, 3 parts of silane coupling agent KH550 and 75 parts of water;

[0115] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0116] Comparative Example 4

[0117] This comparative example provides a modified ferrite magnetic powder and a composite permanent magnetic material prepared by using the modified ferrite magnetic powder. The preparation method of the modified ferrite magnetic powder is the same as that of Example 1 in terms of calcination and ball milling. The formula of the chemically modified solution is as follows:

[0118] 1 part of sodium dodecylbenzene sulfonate, 3 parts of aluminum nitrate, 2 parts of zinc nitrate, 8 parts of polymethyl methacrylate, 3 parts of silane coupling agent KH550 and 75 parts of water;

[0119] The preparation method of the composite permanent magnetic material is the same as that of Example 1.

[0120] Test example

[0121] This test example uses the composite permanent magnetic materials prepared in the above-mentioned Examples 1 to 7 and Comparative Examples 1 to 4 to prepare magnetic false eyelashes without magnetic blocks. Specifically, the method is as follows:

[0122] Prepare a polyethylene thread with simulated hair attached thereto (as the eyelash stem line part) and the composite permanent magnetic material prepared in the above-mentioned Examples 1 to 7 and Comparative Examples 1 to 4, hang the polyethylene thread on the composite permanent magnetic material through a glue hanging machine and solidify it, and then use a magnetizing machine to perform high-voltage magnetization to make the thread magnetic and become a magnetic wire with strong magnetism, thereby preparing magnetic false eyelashes without magnetic blocks.

[0123] The following tests were conducted on the eyelash stem line of the aforementioned magnetic false eyelashes without magnetic blocks:

[0124] (1) Tensile strength

[0125] Test method: Cut a false eyelash stem with a length of 30mm and a thickness of about 0.2mm as a sample, install it on the fixture of the tensile testing machine, set the stretching speed to 1mm / min~2mm / min, start the testing machine to start stretching, and record the data.

[0126] Calculation method: When the false eyelash stem is broken, read the maximum tensile force value F (in N) from the test machine record data. Calculate the cross-sectional area S = b × h (in mm) by measuring the average width b and average thickness h of the sample. 2 ), according to the formula:

[0127] Tensile strength = F / S Calculate the tensile strength in MPa.

[0128] (2) Elongation at break

[0129] The sample preparation and loading methods refer to the above (1). Before testing, use a high-precision marking pen to mark two lines with a spacing of L in the middle of the sample. 0 =20mm marking line, stretch it according to the set stretching speed, and monitor the change in the distance between the two marking lines during the stretching process.

[0130] Calculation method: After the sample breaks, record the final distance L between the two markings. 1 , calculated according to the formula:

[0131] Elongation at break = [(L 1 -L 0 ) / L 0 ]×100% to calculate the elongation at break and the result is expressed as percentage (%).

[0132] (3) Measure its coercivity, remanence (Br) and magnetic energy level (BH) max test;

[0133] (4) Magnetic powder loss: refer to the method in the patent CN102456459B specification to test the magnetic powder loss;

[0134] The results of the performance tests of the above tests (1) to (4) are shown in Table 1:

[0135] Table 1 Performance comparison of Examples 1 to 7 and Comparative Examples 1 to 4

[0136]

[0137] It can be seen from the above test examples that Example 1 has the best effect. Although Comparative Example 2 is better than Example 1 in some properties, its cost is higher, and its mechanical properties such as tensile strength and elongation at break are worse than those of the comparative example. Therefore, the method provided in Example 1 can be preferentially selected in industrial applications.

[0138] (5) Stem line softness test:

[0139] At room temperature, five testers with experience in beauty makeup bent the stems of the test products into different arcs to feel the resistance, elasticity and recovery of the stems when bending. Specifically, they observed whether the stems were easy to break during the bending process, whether they could quickly return to their original shape, or whether they would remain bent.

[0140] Evaluation method: Based on the tester's hand feeling, softness and wearing comfort, the rating is based on the following rating criteria:

[0141] 1 to 2 points means it is very hard, difficult to bend, and feels very bad to wear;

[0142] 3-4 points means it is relatively hard, with obvious resistance when bending and a certain foreign body sensation when worn;

[0143] 5-6 points indicate moderate softness, no great difficulty in bending, and basically comfortable to wear;

[0144] 7-8 points means it is relatively soft, can be bent easily, and feels good to wear;

[0145] 9-10 points means extremely soft, almost no resistance, and excellent fit to the skin;

[0146] Five testers independently scored and took the average value. The experimental results are shown in Table 2;

[0147] Table 2 Comparison of softness and wearing performance of Examples 1 to 7 and Comparative Examples 1 to 4

[0148]

[0149] It can be seen from the above test examples that in terms of softness and wearing comfort, Example 1 has the best effect, followed by Example 3, while the false eyelash stems prepared in the remaining examples and comparative examples are obviously inferior in comfort.

[0150] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A composite permanent magnetic material, characterized in that: The composite permanent magnet material comprises the following raw materials in parts by mass: 15-25 parts of pre-modified ferrite magnetic powder, 50-75 parts of neodymium iron boron magnetic powder, 1-5 parts of coupling agent, 8-12 parts of resin matrix, 3-5 parts of filler, 0.1-0.5 parts of curing agent and 0.8-1.4 parts of lubricant.

2. A composite permanent magnetic material according to claim 1, characterized in that: The coupling agent is any one of a silane coupling agent or a titanate coupling agent, wherein the silane coupling agent is any one or more of KH550 and KH560, and the titanate coupling agent is any one or more of NDZ-101 and NDZ-201; Preferably, the filler is selected from any one or more of silicon dioxide powder, silicon nitride powder, aluminum silicate powder, calcium silicate powder, calcium carbonate powder and barium acid powder; Preferably, the curing agent is any one or more of benzoyl peroxide or dibutyltin dilaurate; Preferably, the lubricant is any one or more of magnesium stearate, zinc stearate, stearic acid or paraffin.

3. A composite permanent magnetic material according to claim 1, characterized in that: The resin matrix is ​​a mixture of any one or more of styrene-butadiene rubber SBR, thermoplastic polyurethane elastomer TPU, styrene-butadiene-styrene block copolymer SBS, and epoxy resin.

4. A method for preparing a composite permanent magnetic material according to any one of claims 1 to 3, characterized in that: Includes steps: S1: modifying ferrite magnetic powder as a raw material to prepare pre-modified ferrite magnetic powder; and uniformly mixing the pre-modified ferrite magnetic powder and NdFeB magnetic powder to obtain mixed magnetic powder; S2: slowly add the coupling agent to the mixed magnetic powder, start the high-speed stirrer at the same time, and stir at a speed of 300-500 rpm for 1-2 hours to make the coupling agent evenly coated on the surface of the mixed magnetic powder particles; S3: first pour the resin matrix into a stirring container, keep stirring at a low speed, add the mixed magnetic powder coated with the coupling agent to the resin matrix glue, add the curing agent, and control the stirring speed at 300 to 800 rpm to obtain a mixed system; S4: transferring the mixed system to an ultrasonic disperser and performing ultrasonic dispersion treatment for 10 to 50 minutes to prepare a magnetic colloid.

5. The preparation method according to claim 4, characterized in that: The method also includes the step of solidifying the prepared magnetic colloid.

6. The preparation method according to claim 4, characterized in that: The method also includes the step of thermally curing or photocuring the prepared magnetic colloid.

7. The preparation method according to claim 4, characterized in that: The preparation method of the pre-modified ferrite magnetic powder is: The ferrite magnetic powder is calcined at 1000-1100° C. for 4-6 hours, and after cooling to room temperature, the ferrite magnetic powder is ground using a ball mill for 6-8 hours, and modified using a chemical modification solution method, wherein the chemical modification solution contains at least an alkane coupling agent; Preferably, the chemical modification solution comprises the following raw materials in parts by weight: 0.5-2 parts of sodium dodecylbenzene sulfonate, 2-5 parts of aluminum nitrate, 1-3 parts of zinc nitrate, 2-6 parts of polyvinyl alcohol, 2-4 parts of polymethyl methacrylate, 2-5 parts of silane coupling agent and 70-80 parts of water.

8. Use of a composite permanent magnetic material as claimed in any one of claims 1 to 3 in cosmetics and beauty products.

9. A magnetic false eyelash without magnetic blocks, characterized in that: It at least comprises a magnetic component and a simulated hair part attached to the magnetic component, wherein the magnetic component is partially or completely made of the composite permanent magnetic material according to any one of claims 1 to 2.

10. A magnetic false eyelash without magnetic blocks, characterized in that: include: An upper simulated eyelash piece and a lower simulated eyelash piece, each of which comprises a stem line and a simulated hair portion attached thereto; the stem line is partially or completely made of the composite permanent magnetic material according to any one of claims 1 to 2.

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