A recycled PET material and its synthesis method and application

Abstract

The present invention discloses a recycled PET material and a synthesis method and application thereof, belonging to the technical field of cosmetic tools. The recycled PET material provided by the present invention includes the following raw materials by mass: 100 parts of recycled PET; 2 to 8 parts of silver powder; 0.2 to 0.5 parts of silane coupling agent; 2 to 3 parts of ethylene glycol; 0.5 to 1 part of dispersant; 0.5 to 1 part of catalyst; the particle size of the silver powder is 2 to 50 μm. The cosmetic brush prepared by the recycled PET material provided by the present invention has the advantages of low cost, good powder grasping property, excellent antistatic property, high durability, etc. The present invention also provides a synthesis method of the above-mentioned recycled PET material and a cosmetic brush prepared by the same.

Description

Technical Field

[0001] The invention relates to the technical field of cosmetic tools, and in particular to a recycled PET material and a synthesis method and application thereof. Background Art

[0002] A makeup brush is a common makeup tool, which is mainly composed of bristles, a handle, and a connecting part connecting the bristles and the handle.

[0003] The bristles of makeup brushes are the part that directly contacts the cosmetics and the skin. They are the most important part of makeup brushes and are also an important basis for judging the quality of makeup brushes. The materials of the bristles are divided into artificial fibers and animal hair. Animal hair includes wool, horse hair and pig bristles. The materials of artificial fibers include nylon and polyester. Compared with animal hair, artificial fibers have many advantages such as easy cleaning, more durability and lower price. However, artificial fibers still need to be improved in powder holding, anti-static and washability. The materials of the connecting parts of makeup brushes are usually metal aluminum, copper and plastic, and the materials of the handle of makeup brushes are metal, wood and plastic. Although the above materials are relatively mature, they still have disadvantages such as relatively high costs.

[0004] In summary, makeup brushes in traditional technology usually have difficulty in balancing cost, practicality and durability. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a cosmetic brush made of recycled PET material, which has the advantages of low cost, good powder-grabbing ability, excellent antistatic property, high durability, etc.

[0006] The invention also provides a method for synthesizing the recycled PET material.

[0007] The present invention also provides application of the recycled PET material, and specifically provides a cosmetic brush prepared therefrom.

[0008] According to an embodiment of the first aspect of the present invention, a recycled PET material is provided, wherein the recycled PET material comprises the following preparation raw materials by weight:

[0009]

[0010] The particle size of the silver powder is 2 to 50 μm.

[0011] The recycled PET material according to the embodiment of the present invention has at least the following beneficial effects:

[0012] (1) The recycled PET material provided by the present invention is prepared from recycled PET as the main raw material, which is a waste reuse with low cost.

[0013] (2) The recycled PET material provided by the present invention is prepared from raw materials including silver powder, which simultaneously has the triple functions of nucleating agent, antistatic agent and filler. Therefore, the recycled PET material provided by the present invention has higher strength and significant antistatic effect.

[0014] Furthermore, the compatibility between the obtained silver powder and the recycled PET was improved by adding a silane coupling agent.

[0015] (3) The ethylene glycol added to the raw material has the dual functions of a compatibilizer and a chain extender (acting with the assistance of the catalyst), thereby adjusting the molecular weight and viscosity of the recycled PET material, thereby improving the mechanical properties of the recycled PET material.

[0016] (4) In the recycled PET material provided by the present invention, due to the adjustment of parameters such as the type and amount of raw materials used in the preparation, the antistatic performance, anti-deformation performance, antibacterial performance and mechanical properties of the recycled PET material are significantly improved.

[0017] According to some embodiments of the present invention, the mass ratio of the recycled PET to the silver powder is 100:3-7. For example, it may be about 100:5 or about 100:6.

[0018] According to some embodiments of the present invention, the particle size of the silver powder is 5 to 30 μm, for example, about 10 μm, 15 μm, 20 μm or about 25 μm.

[0019] If not otherwise specified, the particle size of the silver powder in the present invention is the Dn50 particle size.

[0020] According to some embodiments of the present invention, the mass ratio of the recycled PET to the silane coupling agent is 100:0.3-0.4.

[0021] According to some embodiments of the present invention, the silane coupling agent includes at least one of APTMS, APTS, APTES, KH550, KH-560, KH-570 and KH-580.

[0022] According to some embodiments of the present invention, the mass ratio of the recycled PET to the ethylene glycol is 100:2.2-2.8, for example, specifically about 100:2.5.

[0023] According to some embodiments of the present invention, the mass ratio of the recycled PET to the dispersant is 100:0.6-0.9, for example, specifically about 100:0.8.

[0024] According to some embodiments of the present invention, the dispersant includes at least one of polyethylene glycol laurate, fatty amine polyoxyethylene ether and sodium dodecylbenzene sulfonate.

[0025] According to some embodiments of the present invention, the catalyst includes at least one of antimony oxide and germanium oxide.

[0026] According to some embodiments of the present invention, the catalyst is a mixture of antimony oxide and germanium oxide in a mass ratio of 0.8 to 1.2:1. The mass ratio of the two can be specifically about 1:1.

[0027] According to an embodiment of the second aspect of the present invention, a method for synthesizing a recycled PET material is provided, the method comprising melting the recycled PET, sequentially adding the ethylene glycol, the catalyst, the mixture of the silane coupling agent and silver powder, and the dispersant, and continuing to mix.

[0028] The preparation method according to the embodiment of the present invention has at least the following beneficial effects:

[0029] The preparation method provided by the present invention follows the traditional melting and mixing method and is simple to operate and easy to implement.

[0030] In the preparation method provided by the present invention, by adjusting the adding order of the preparation raw materials, the compatibility of the silver powder and other materials is improved, and the controllability of the mechanical properties of the obtained recycled PET material can also be further improved.

[0031] According to some embodiments of the present invention, the synthesis method further comprises removing impurities from the recycled PET before the melting.

[0032] According to some embodiments of the present invention, the impurity removal process includes screening, washing and drying in sequence. The screening can separate some impurities such as dust from the recycled PET. The washing can further remove water-soluble impurities.

[0033] According to some embodiments of the present invention, the water washing temperature is 60-85°C. A higher temperature can even remove some oil-soluble impurities. The water washing temperature can specifically be about 65°C, 70°C, 75°C or about 80°C.

[0034] According to some embodiments of the present invention, the duration of the water washing is 20 minutes to 60 minutes, for example, it can be about 25 minutes, 30 minutes, 35 minutes, 40 minutes or about 50 minutes.

[0035] According to some embodiments of the present invention, the melting temperature is 240-280°C, for example, about 250°C, 260°C or about 270°C.

[0036] According to some embodiments of the present invention, the mixture of the silane coupling agent and the silver powder is obtained by ball milling. Specifically, the silane coupling agent and the silver powder are mixed and then ball milled. The ball milling time is 5 to 30 minutes. The ball milling is carried out under the condition of isolating oxygen. This can improve the bonding strength between the silver powder and the silane coupling agent, which is equivalent to surface modification of the silver powder; and avoid oxidation of small-particle silver powder during ball milling.

[0037] According to some embodiments of the present invention, the ball milling time of the silane coupling agent and the silver powder is about 10 min, 15 min or about 20 min.

[0038] According to an embodiment of the third aspect of the present invention, there is provided a cosmetic brush, wherein the raw material for preparing the cosmetic brush comprises the recycled PET material;

[0039] The cosmetic brush comprises bristles, a hand-held part and a connecting part connecting the bristles and the hand-held part; pits are arranged on the bristles.

[0040] The cosmetic brush according to the embodiment of the present invention has at least the following beneficial effects:

[0041] The cosmetic brush provided by the present invention is made entirely of recycled PET material, thereby reducing the cost of the cosmetic brush.

[0042] The recycled PET material includes silver powder, so it has antibacterial, strength-enhancing and anti-static effects; that is, due to the design of the recycled PET material components, the performance of the makeup brush is significantly improved.

[0043] In the cosmetic brush provided by the present invention, the bristle part is designed with pits, thereby improving the powder-grabbing ability of the bristles. Furthermore, the presence of the pits also improves the flexibility of the bristles, making them closer to the skin.

[0044] According to some embodiments of the present invention, the diameter of the bristles is 50-150 μm, for example, about 60 μm, 70 μm, 80 μm, 90 μm, 100 μm or about 120 μm.

[0045] According to some embodiments of the present invention, the connecting portion has two opposite surfaces, and the bristles and the handheld portion are respectively fixed on the two opposite surfaces of the connecting portion.

[0046] According to some embodiments of the present invention, a hole structure is provided on one surface of the connecting portion, so as to fix the bristles.

[0047] According to some embodiments of the present invention, the shape of the handheld portion includes at least one of a rod, a pancake, and an irregular shape, wherein the diameters of the two ends of the rod may be the same or different.

[0048] According to some embodiments of the present invention, one end of the hand-held portion is provided with a groove portion, so as to be mortised with one end of the connecting portion.

[0049] According to an embodiment of the fourth aspect of the present invention, there is provided a method for preparing the cosmetic brush, the method comprising the following steps:

[0050] S1. The recycled PET material is made into a fiber material, wherein the diameter of the fiber material is 50 to 150 μm;

[0051] The connecting part and the hand-held part are prepared by injection molding using the recycled PET material as raw material;

[0052] S2. Partially immersing the fiber material in step S1 in a caustic soda solution, then washing with water and drying; obtaining the bristles;

[0053] S3. Fix the bristles to the surface of one end of the connecting part; and connect the hand-held part to the other end of the connecting part.

[0054] The mechanism of the preparation method is as follows:

[0055] In the recycled PET material, the silver powder is dispersed in the middle of the recycled PET, and of course part of it will be exposed on the surface of the material, especially when the recycled PET material is made into a fiber material.

[0056] In step S2, the fiber material is partially immersed in a caustic soda solution, and oxygen in the air, silver powder and the caustic soda solution react to dissolve the silver powder and form pits. At the same time, the process of immersing in the caustic soda solution also has the effect of grinding the peaks; it is also due to this effect that some of the silver powder particles embedded in the shallow surface of the recycled PET material are exposed, thereby improving the antibacterial effect of the obtained bristles.

[0057] Since the recycled PET material is a thermoplastic material, the various parts of the cosmetic brush can be connected by glue, mechanical structure connection (such as mortise and tenon), or hot melt bonding.

[0058] The method for preparing a cosmetic brush according to an embodiment of the present invention has at least the following beneficial effects:

[0059] The preparation method provided by the invention is simple, mature and easy to implement.

[0060] According to some embodiments of the present invention, in step S1, the method for forming the fiber material includes at least one of drawing and spinning.

[0061] According to some embodiments of the present invention, in step S1, when the fiber material is formed by spinning, the spinning steps are as follows:

[0062] a. dissolving the recycled PET material in an organic solvent;

[0063] b. electrospinning the mixture obtained in step a;

[0064] The electrospinning should satisfy at least one of the following parameters:

[0065] (1) The voltage of the electrospinning is 16 to 20 kV;

[0066] (2) the propulsion rate of the mixture obtained in step a is 0.05 to 0.15 mL / min;

[0067] (3) The receiving distance of the electrospinning is 18 to 20 cm.

[0068] According to some embodiments of the present invention, in step a, the organic solvent comprises dichloromethane and trifluoroacetic acid, wherein the volume ratio of the dichloromethane to the trifluoroacetic acid is 1.5 to 2.5:1.

[0069] According to some embodiments of the present invention, in step S1, when the fiber material forming method includes wire drawing, the wire drawing is melt extrusion wire drawing, and its parameters should satisfy at least one of the following parameters:

[0070] Zone 1: 180°C to 220°C; for example, it may be about 190°C, 200°C or about 210°C;

[0071] Zone 2: 220°C to 240°C; for example, about 225°C, 230°C or about 235°C;

[0072] Zone 3: 230°C to 250°C; for example, it may be about 235°C, 240°C or about 245°C;

[0073] Zone 4: 240°C to 260°C; for example, it may be about 245°C, 250°C or about 255°C;

[0074] Zone 5: 250°C to 270°C; for example, it may be about 255°C, 260°C or about 265°C;

[0075] Flange: 240°C to 260°C; for example, it may be about 245°C, 250°C or about 255°C;

[0076] Pump: 240°C to 260°C; for example, about 245°C, 250°C or about 255°C;

[0077] Die head: 240°C to 260°C; for example, it may be about 245°C, 250°C or about 255°C.

[0078] According to some embodiments of the present invention, in step S1, the diameter of the fiber material is 55-140 μm, for example, about 60 μm, 70 μm, 80 μm, 90 μm, 100 μm or about 120 μm.

[0079] According to some embodiments of the present invention, in step S2, the mass concentration of the caustic soda solution is 15-45%, for example, about 20%, 25%, 30%, 35% or about 40%.

[0080] According to some embodiments of the present invention, in step S2, the soaking time is 5 to 50 minutes, for example, about 10 minutes, 20 minutes, 30 minutes or about 40 minutes.

[0081] According to some embodiments of the present invention, in step S2, the immersion is performed in an oxygen-containing environment. Specifically, the immersion may be performed by blowing air or oxygen into the caustic soda solution.

[0082] According to some embodiments of the present invention, in step S2, the soaking temperature is 100-130°C.

[0083] According to some embodiments of the present invention, the preparation method further comprises performing hair trimming between step S2 and step S3.

[0084] If there is no special explanation, the actual meaning of “about” in the present invention is that the error is allowed to be within the range of ±2%, for example, about 100 is actually 100±2%×100.

[0085] Unless otherwise specified, “between” in the present invention includes the number itself, for example, “between 2 and 3” includes the endpoint values ​​2 and 3.

[0086] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION

[0087] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0088] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0089] Example 1

[0090] This example prepares a cosmetic brush, and the specific steps are as follows:

[0091] S0. Preparation of recycled PET material, the specific types and proportions of raw materials are shown in Table 1, and the specific process is as follows:

[0092] The recycled PET was air-dried and vibrated to remove some impurities; the screened PET was soaked and washed in water at a temperature of 75°C for 30 minutes; the soaking process was supplemented with stirring to accelerate the separation of impurities and the recycled PET; and then dried to obtain the recycled PET (the mass in Table 1 is the mass obtained in this step). The source of the recycled PET in this step is not limited.

[0093] The silane coupling agent and silver powder were mixed and ball-milled for 10 minutes, and after cooling, taken out and stored in an oxygen-free environment (hereinafter referred to as the silver powder mixture).

[0094] The impurity-free recycled PET is melted at 260°C, and then ethylene glycol, catalyst, silver powder mixture and dispersant polyethylene glycol laurate are added in sequence under stirring. Each time a substance is added, visual uniformity must be achieved; according to experience, the mixing time after each addition of a substance is ≥5 minutes. Cooling or extrusion granulation is possible.

[0095] S1. Preparation of parts:

[0096] S1a. The recycled PET material obtained in step S0 is prepared into a fiber material by a melt spinning method, and the specific parameters are:

[0097] Zone 1: 200℃;

[0098] Zone 2: 230℃;

[0099] Zone 3: 240℃;

[0100] Zone 4: 250℃;

[0101] Zone 5: 260℃;

[0102] Flange: 250℃;

[0103] Pump: 250℃;

[0104] Die head: 250℃.

[0105] By adjusting the diameter of the die pinhole and the subsequent pulling force, the diameter of the obtained fiber material is about 80 μm.

[0106] The obtained fiber material is cut as required.

[0107] If the production process is continuous, the process of step S0 can be carried out in a double-die instrument in this step, thereby avoiding the secondary melting process.

[0108] S1b using injection molding, the recycled PET material obtained in step S0 as a raw material for preparing the connecting portion and the handheld portion;

[0109] The connecting portion has an A surface and a B surface opposite to each other; a hole structure is arranged on the A surface, and the diameter of the hole structure is greater than the diameter of the fiber material so as to accommodate the fiber material.

[0110] The hand-held part is in the shape of a rod, and a recessed part is provided at one end for the connecting part to be embedded.

[0111] As above, if the production process is continuous, the product obtained in step S0 may not be cooled but directly injection molded, thereby avoiding the secondary melting process.

[0112] S2. Soak the fiber material obtained in step S1a in a caustic soda solution with a concentration of 25 wt% for 15 minutes at a temperature of 110° C. and oxygen is blown into the solution.

[0113] After taking it out, wash it with water and dry it; then trim it.

[0114] S3. Assemble, using glue to fix the bristles obtained in step S2 into the hole structure of the connecting part obtained in step S1b.

[0115] The other side of the connecting part is partially hot-melted and then embedded in the recessed part of the hand-held part.

[0116] In this example, the order between step S2 and step S1b, and between step S1a and step S1a is not strictly limited, and is only for the convenience of expression.

[0117] Example 2

[0118] This example prepares a cosmetic brush, which is different from Example 1 in that:

[0119] The raw materials for preparing recycled PET materials are different, the specific differences are shown in Table 1.

[0120] Example 3

[0121] This example prepares a cosmetic brush, which is different from Example 1 in that:

[0122] In step S2, the concentration of the caustic soda solution is 15wt%.

[0123] Comparative Example 1

[0124] This example prepares a cosmetic brush, which is different from Example 1 in that:

[0125] The raw materials for preparing recycled PET materials are different, the specific differences are shown in Table 1.

[0126] Comparative Example 2

[0127] This example prepares a cosmetic brush, which is different from Example 1 in that:

[0128] The composition of the raw materials for preparation is different, and the specific differences are shown in Table 1.

[0129] Comparative Example 3

[0130] This example prepares a cosmetic brush, which is different from Example 1 in that:

[0131] Step S2 is not performed.

[0132] Table 1 Comparison of raw materials for preparation of Examples 1 to 2 and Comparative Examples 1 to 2

[0133]

[0134] Test Case

[0135] This test example refers to GB / T21510 to test the antibacterial rate (=1-the number of viable bacteria after culture / the number of viable bacteria inoculated) of the bristles of the cosmetic brushes obtained in the examples and comparative examples.

[0136] This example also tests the powder-grabbing ability of the makeup brush bristles obtained in the embodiment and the comparative example. The specific test method is to use the makeup brush obtained in the embodiment or the comparative example to sweep the newly unpacked AFK loose powder three times, each time with a path length of 7 cm; calculate the weight gain and the mass ratio of the makeup brush bristles, and use this value to characterize the powder-grabbing ability. Then, the makeup brush after powder collection is lightly swept on human skin three times, each time with a path length of 7 cm, and calculate the percentage of the weight loss mass in this step to the weight gain mass when powder is collected, and calculate the difference between it and 1, and use this difference to represent the powder intake.

[0137] This example also tests the resilience (service life) of the makeup brushes obtained in the examples and comparative examples, that is, on an A4 paper, the makeup brush is pressed down vertically (with the bristles facing one side) until the angle between the bristles and the handle is ≤120°, and then lifted; this is repeated 4,000 times, and the bristle breakage rate is calculated. The breakage includes fracture and the failure to rebound after deformation. Five parallel tests are conducted for each specific implementation method, and the average value is taken.

[0138] This example also tests the softness of the cosmetic brush bristles obtained in the examples and comparative examples. The softness of the cosmetic brush bristles is determined by the sledgehammer test described in EN 1202PPS. The key elements of this test are: 5 g of cosmetic brush bristles are collected and combed twice using, for example, an MTDA-3 Rotorring device. The fibers are conditioned for at least 24 hours according to EDANA instructions (ERT 60.2-99) and cut into small pieces using a template. The material is placed in a testing machine and a sledgehammer (loaded 2000 g) is installed and placed on the sample. The test is started and the force required to drag the sledgehammer is measured after 10 seconds; the softness of commercially available wool cosmetic brush bristles is 1.

[0139] The results of the above tests are shown in Table 2.

[0140] Table 2 Performance of cosmetic brushes obtained in Examples and Comparative Examples

[0141]

[0142] By comparing Example 1 and Example 2, it can be seen that the increase in the silver powder particle size will increase the breakage rate of the bristles to a certain extent. This is because when the silver powder particle size increases, the pits on the bristles also become larger, so that the thinnest part of the bristles is thinner; further, as the pits become larger, the powder grabbing ability of the makeup brush becomes stronger; however, the deeper the pits, the powder in the pits is not easy to fall off completely after sweeping on the skin, which increases the powder eating quality; since the powder eating amount is related to the powder grabbing quality and the powder eating quality, after combining the two and calculating, the powder eating amount of Examples 1 and 2 is actually equivalent in the end.

[0143] By comparing Example 1, Example 3 and Comparative Example 3, it can be seen that if the concentration of the caustic soda solution is reduced, or the caustic soda solution is not used for corrosion at all, the silver powder particles cannot be corroded, or the corrosion depth is shallow, thereby reducing the powder grabbing ability.

[0144] By comparing Example 1 and Comparative Example 1, it can be seen that if silver powder is not included, first of all, the antibacterial performance decreases. Secondly, during the makeup brush test, it was found that the handheld portion was easily deformed, that is, the mechanical properties of the obtained recycled PET material were poor. And if there is no silver powder, the powder grabbing depends only on the adhesion of the bristles, and the powder adhering to the surface of the bristles is difficult to detach from the surface of the bristles, and the amount of powder eaten increases; in other words, the pits will deform in the process of the bristles sweeping towards the skin, and the powder in the pits of appropriate depth will fall off and adhere to the skin. In other words, the presence of the pits does not have a very large effect on the powder eating quality of the bristles (the surface area increases, and the powder eating quality will increase slightly), but the presence of the pits will increase the amount of powder caught. On the whole, the bristles with pits have a smaller amount of powder eaten.

[0145] By comparing Example 1 and Comparative Example 2, it can be seen that if the amount of ethylene glycol added is less than the required range of the present invention, the surface of the obtained recycled PET material lacks smoothness and is rougher, and the control of the molecular weight is weak, and the obtained material is more likely to break.

[0146] In summary, the makeup brush provided by the present invention has many advantages such as low cost, strong powder holding ability, no powder absorption, high softness, long service life, and significant antibacterial effect due to the combination of preparation raw materials and preparation process; it is expected to be promoted in the cosmetics market.

[0147] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A cosmetic brush, characterized in that: The raw materials for preparing the cosmetic brush include recycled PET material; The cosmetic brush comprises: bristles, a hand-held portion, and a connecting portion connecting the bristles and the hand-held portion; the bristles are provided with pits; The recycled PET material includes the following raw materials by weight: Recycle PET 100; Silver powder 2~8 parts; Silane coupling agent 0.2~0.5 parts; 2~3 parts of ethylene glycol; Dispersant 0.5~1 part; 0.5-1 part of a catalyst; the catalyst comprises at least one of antimony oxide and germanium oxide; The particle size of the silver powder is 2-50 μm; The recycled PET material is synthesized by a method comprising the following steps: after melting the recycled PET, sequentially adding the ethylene glycol, the catalyst, the mixture of the silane coupling agent and silver powder, and the dispersant, and continuing to mix; The cosmetic brush is prepared by a preparation method comprising the following steps: S1. The recycled PET material is made into a fiber material, wherein the diameter of the fiber material is 50 to 150 μm; The connecting part and the hand-held part are prepared by injection molding using the recycled PET material as raw material; S2. Partially immerse the fiber material in step S1 in a caustic soda solution, then wash with water and dry; obtain the bristles; the mass concentration of the caustic soda solution is 15-45%, the temperature is 100-130°C; the immersion time is 5-50min; S3. Fix the bristles to the surface of one end of the connecting part; and connect the hand-held part to the other end of the connecting part.

2. The cosmetic brush according to claim 1, characterized in that: The dispersant includes at least one of polyethylene glycol laurate, fatty amine polyoxyethylene ether and sodium dodecylbenzene sulfonate.

3. The cosmetic brush according to claim 1, characterized in that: The melting temperature of the recycled PET is 240-280°C.

4. The cosmetic brush according to claim 1 or 3, characterized in that: The method for synthesizing the recycled PET material also includes removing impurities from the recycled PET before melting.

5. The cosmetic brush according to claim 1, characterized in that: The diameter of the bristles is 50-150 μm.

Images