Cosmetic glass bottle containing improved frosted layer and preparation method thereof

Abstract

The invention provides a cosmetic frosted glass bottle and a preparation method thereof, and belongs to the technical field of glass processing and manufacturing. The frosted glass bottle comprises a bottle body substrate and a frosted layer at least covering part of the surface of the bottle body substrate, the bottle body substrate is made of silicate glass, and the frosted layer is prepared from, by mass, 30-60 parts of polyacrylate, 5-8 parts of polypropylene, 1-5 parts of maleic anhydride grafted polypropylene compatilizer, 20-40 parts of frosted filler and 1-5 parts of nonionic surfactant. And 1-10 parts of a film additive. According to the cosmetic frosted glass bottle, no pollutant or acid waste water or harmful gas is generated in the whole preparation process, human health is not harmed, the great environmental protection value is achieved, the frosted layer of the prepared glass bottle has the high product percent of pass, the good adhesive capacity and abrasion resistance and the frosted texture of high light transmittance and high haze, and the cosmetic frosted glass bottle has the good application prospect. And meanwhile, the method is suitable for silk-screen printing and is suitable for being applied to the field of packaging products.

Description

Technical Field

[0001] This invention belongs to the field of glass product processing technology, specifically relating to a frosted glass bottle for cosmetics and its preparation method, and more particularly to a cosmetic glass bottle prepared using an improved frosted layer and its preparation method. Background Technology

[0002] In daily chemical products, frosted glass bottles with a matte finish are often preferred packaging containers for mid-to-high-end cosmetics. Currently, there are four main manufacturing methods for frosted glass: mechanical grinding, frosting or acid etching, sandblasting, and physical sintering. However, mechanical grinding produces a poor frosted texture and generates a large amount of dust, causing air pollution and harming worker health. Frosting or acid etching is technically challenging and generates large amounts of difficult-to-treat acid wastewater that pollutes the environment. Sandblasting is less difficult, but still presents air pollution and health risks. Physical sintering involves attaching a solution containing glass powder to the glass surface via screen printing or roller printing, followed by sintering at 600-720℃ for 3-5 minutes and then air cooling. This method is the most environmentally friendly compared to other processes, but due to the high sintering temperature, it is more suitable for flat glass and has significant limitations for three-dimensional bottles and jars.

[0003] Besides directly processing and manufacturing glass bottles, existing technologies also employ electrostatic adsorption of solid powder, adhesive bonding of frosted films, or application of water-based frosted paint to achieve a frosted texture on the surface of packaging containers. However, electrostatic adsorption has weak bonding strength, resulting in poor adhesion and wear resistance of the frosted surface; while applying frosted films is very convenient, adhesive bonding makes them easily detached from the bottle, and the use of adhesives also poses a threat to human health; and applying water-based frosted paint results in poor adhesion of the paint film to the glass substrate, easily creating blank spots during application, leading to a low process qualification rate, and the paint is prone to peeling off after prolonged use.

[0004] Therefore, existing technologies have not yet provided a frosted glass bottle and its preparation method that do not pollute the environment or harm human health, are suitable for making three-dimensional bottle and jar packaging containers, and simultaneously have a uniform frosted texture, excellent adhesion and wear resistance. Summary of the Invention

[0005] To address the aforementioned issues, this application aims to provide a frosting process for three-dimensional bottle and jar packaging containers that is environmentally friendly and does not harm human health throughout the entire process, and also produces glass bottles with excellent frosting effect and adhesion, as well as frosted glass bottles prepared using this process.

[0006] On one hand, this application provides a frosted glass bottle, comprising: a bottle base, and a frosted layer covering at least a portion of the surface of the bottle base.

[0007] The base material of the bottle is silicate glass.

[0008] The frosted layer comprises the following raw materials in parts by weight: 30-60 parts polyacrylate, 5-8 parts polypropylene, 1-5 parts maleic anhydride-grafted polypropylene compatibilizer, 20-40 parts frosting filler, 1-5 parts nonionic surfactant, and 1-10 parts film additives.

[0009] It is understood that the frosted layer on the surface of the bottle base in this application can create a frosted visual effect. In one embodiment, the frosted layer can completely cover the outer surface of the bottle base; in other embodiments, the frosted layer can be designed as a frosted pattern to partially cover the outer surface of the bottle base.

[0010] In one embodiment, the polyacrylate is selected from one or more of polymethyl methacrylate, polyethyl methacrylate, polyhydroxymethyl methacrylate, and polyhydroxyethyl methacrylate.

[0011] Preferably, the polyacrylate is poly(hydroxyethyl methacrylate).

[0012] In one embodiment, the polyacrylate has a molecular weight of 500,000 to 1,000,000.

[0013] In one embodiment, the molecular weight of the polypropylene is 80,000 to 150,000.

[0014] In one embodiment, the molecular weight of the maleic anhydride-grafted polypropylene compatibilizer is 4000-5000.

[0015] In one embodiment, the abrasive filler is selected from low-melting-point glass powder or silica micro powder.

[0016] In one embodiment, the nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, and glycerol fatty acid esters.

[0017] Preferably, the nonionic surfactant is a fatty alcohol polyoxyethylene ether, such as dodecyl alcohol polyoxyethylene ether, hexadecyl alcohol polyoxyethylene ether, octadecyl alcohol polyoxyethylene ether, and more preferably octadecyl alcohol polyoxyethylene ether.

[0018] In one embodiment, the film additive is selected from one or more of plasticizers, stabilizers, antioxidants, and diluents.

[0019] In one embodiment, the plasticizer is a phthalate.

[0020] In one embodiment, the stabilizer is hydroquinone.

[0021] In one embodiment, the antioxidant is dilaurate dipropionate.

[0022] In one embodiment, the diluent is propylene glycol butyl ether.

[0023] In one embodiment, the additive may also include conventional industrial additives such as leveling agents, defoamers, and film-forming agents, or may be selected industrial chemicals that can perform multiple functions at the same time. For example, propylene glycol butyl ether can act as a diluent while also promoting leveling and film formation.

[0024] In one embodiment, color powder may be added to the raw material of the frosted layer according to actual product requirements, so that the resulting frosted layer has a color.

[0025] In one embodiment, the silicate glass is selected from sodium-calcium silicate glass or borosilicate glass.

[0026] On the other hand, this application also provides a method for preparing the frosted glass bottle, comprising the following steps:

[0027] Step 1: Weigh the abrasive filler and nonionic surfactant according to the mass fractions, mix them evenly and grind them to obtain the modified abrasive filler;

[0028] Step 2: Weigh the remaining raw material components required for the frosted layer according to the mass proportions, mix and heat until melted, add the modified frosted filler obtained in Step 1 and stir thoroughly to obtain the film-forming stock solution; put the film-forming stock solution into the film-forming machine to extrude and cast the film, and then obtain the frosted layer film after biaxial stretching and heat setting.

[0029] Step 3: Cut the frosted film into the shape to be attached, and apply silane coupling agent to one side of the film surface;

[0030] Step 4: Shape the molten silicate glass liquid into a bottle base, and then anneal it. When the annealing temperature is 5-20°C higher than the film melting temperature, lay the frosted film coated with silane coupling agent in Step 3 on the frosted area of ​​the bottle base and keep it warm for 1-10 minutes.

[0031] Step 5: Allow the glass to cool naturally to room temperature to obtain the frosted glass bottle.

[0032] In one embodiment, in step one, the modified abrasive filler obtained by grinding has a particle size of 0.5 to 3 micrometers.

[0033] In one embodiment, in step two, the temperature at which the frosted layer is heated and melted is set to 170–180°C.

[0034] In one embodiment, in step two, the extrusion temperature of the film forming machine is set to 80–95°C.

[0035] In one embodiment, in step two, the thickness of the frosted film is 0.1-0.5 mm.

[0036] In one embodiment, in step three, the silane coupling agent is selected from one or more of KH550, KH560, KH602, and KH792.

[0037] In one embodiment, an appropriate amount of silane coupling agent is applied to the surface of the film, with the preferred method being that no coupling agent liquid overflows when the frosted film is attached to the bottle substrate.

[0038] In one embodiment, the forming step in step four can be achieved by various methods, such as core forming, casting, mold forming, blow forming, etc.

[0039] In one embodiment, in step four, the annealing temperature for laying the covering frosted film is 170°C to 185°C.

[0040] In one embodiment, in step four, the annealing process is a slow cooling and holding process performed in two to five stages starting from the annealing temperature.

[0041] In one embodiment, the annealing cooling rate is 3-5°C / min, and the holding time is 1-90min.

[0042] In one embodiment, the silicate glass melt can be prepared using inorganic salt raw materials, mineral raw materials, or glass fragments conventionally used for glass preparation, such as quartz sand, soda ash, limestone, feldspar, borax, etc.

[0043] In one embodiment, the silicate glass melt can be obtained by conventional methods, such as heating and melting at a temperature of 1100–1800°C for 5–48 hours.

[0044] In one embodiment, the base of the cosmetic frosted glass bottle is a bottle-type container with a generally regular shape, a large area of ​​flat outer surface, and no handles or other accessories. The horizontal cross-sectional shape of the base can be circular, elliptical, square, etc.

[0045] This application has at least the following beneficial effects:

[0046] 1. The frosted glass bottle for cosmetics provided in this application is made by attaching a frosted layer film containing frosted filler prepared with specific raw materials to the glass bottle when it is annealed to the film melting temperature. This makes the glass bottle display a frosted effect at the attached film position. The operation process is simple and has low technical requirements. It does not require additional expensive precision equipment or complex sintering steps. It is suitable for making frosted effects for three-dimensional glass products such as bottles and jars. Moreover, the entire preparation process does not generate pollutants, acid wastewater or harmful gases. It also does not require manual spraying operations, which has great environmental value and does not harm human health. It is suitable for large-scale industrial applications, especially for glass manufacturing and processing enterprises that manufacture frosted glass bottles at low cost or where it is difficult to carry out post-contamination treatment.

[0047] 2. The frosted glass bottle for cosmetics prepared using the method provided in this application achieves its frosted effect through a frosted layer made from specific raw materials. This frosted layer is formed by attaching a frosted film. This arrangement allows the frosted filler to be fixed in the film before being transferred to the outside of the glass bottle, eliminating the need for acid washing or manual contact with the powder. It can be used as a pollution-free and health-free frosting method. Furthermore, the film has uniform thickness, texture, and distribution of the frosted filler, resulting in high light transmittance. Consequently, the frosted layer has a more uniform particle distribution, superior sensory effect, and no blank spots without frosted particles, thus improving the process qualification rate.

[0048] 3. When preparing a frosted glass bottle for cosmetics using the method provided in this application, it is quite difficult to effectively form a frosted layer in the form of a frosted film, especially since the raw material composition of the frosted film has a significant impact on the formation result of the frosted layer. When the glass bottle is annealed to a temperature slightly above the film melting point, the internal stress of the glass bottle wall is almost completely released. However, the glass surface still has a certain surface energy, which is better than that under room temperature or after complete cooling and reheating. This promotes the formation of chemical bonds between the glass surface molecules and the silane coupling agent coated on the film surface. The bottle body's temperature, which is above the melting point, causes the polymer component substrate to heat up rapidly after the film is applied until it melts. This promotes the formation of chemical bonds between the components in the film and the silane coupling agent coated on the surface. Finally, with the coupling agent, a more stable bond is formed with the glass substrate, significantly improving the adhesion of the frosted layer to the glass substrate surface. At the same time, with specific film raw material components, the resulting frosted glass bottle layer has a high product qualification rate, good adhesion and wear resistance, as well as a frosted texture with high light transmittance and high haze. It is also suitable for screen printing and is suitable for application in the packaging industry. Detailed Implementation

[0049] To more clearly illustrate the overall concept of this application, a detailed description is provided below by way of embodiments. Numerous specific details are set forth in the following description to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described.

[0050] Unless otherwise specified, the production processes, experimental methods, or testing methods involved in the embodiments of this invention are all conventional methods in the prior art, and their names and / or abbreviations are all conventional names in the field, which are very clear and distinct in the relevant application areas. Those skilled in the art can understand the conventional process steps based on the names and apply the corresponding equipment, and implement them according to conventional conditions or the conditions recommended by the manufacturer.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0052] The various instruments, equipment, raw materials or reagents used in the embodiments of the present invention are not subject to any special restrictions on their source. Unless otherwise specified, they can all be obtained from conventional commercial channels or prepared in accordance with conventional methods known to those skilled in the art.

[0053] In the examples described below, the polyacrylates are all industrial-grade solid particles with a molecular weight of 500,000 to 1,000,000; polypropylene, high-density polyethylene, polystyrene, polycarbonate, etc. are all industrial-grade solid particles with a molecular weight of 80,000 to 150,000; each compatibilizer is an industrial-grade liquid with a molecular weight of 4,000 to 5,000; the surfactants are all liquids and commercially available; the low-melting-point glass powder or silica micropowder is an industrial-grade solid particle with a particle size of 5-13 micrometers; and the remaining raw materials are all commercially available materials conventional in the art.

[0054] Example 1

[0055] This embodiment provides a frosted glass cosmetic bottle, which includes a bottle base made of silicate glass and a frosted layer covering at least a portion of the surface of the bottle base. The area on the bottle base surface where the frosted layer is attached creates a frosted visual effect. In this embodiment, the frosted layer completely covers the outer surface of the bottle base. In other embodiments, the frosted layer can be designed as a frosted pattern, partially covering the outer surface of the bottle base.

[0056] The base material of the frosted glass bottle is sodium-calcium silicate glass, which can be common sodium-calcium glass available on the market. For example, in this embodiment, it is made of the following raw material components in parts by weight: 40 parts quartz sand, 40 parts colorless crushed glass, 10 parts soda ash, 5 parts limestone, and 5 parts feldspar.

[0057] The frosted layer of this frosted glass bottle is made from the following raw material components in parts by weight:

[0058] 45 parts polymethyl methacrylate, 8 parts polypropylene, 2 parts maleic anhydride-grafted polypropylene compatibilizer, 35 parts low melting point glass powder, 4 parts octadecyl alcohol polyoxyethylene ether, 2 parts phthalate, 1 part hydroquinone, 1 part dilaurate dipropionate, and 2 parts propylene glycol butyl ether.

[0059] The frosted glass bottle was prepared using the following method:

[0060] Step 1: Preparation of modified abrasive filler: Weigh low melting point glass powder and octadecyl alcohol polyoxyethylene ether according to the mass fraction, mix them evenly, and then grind them into ultrafine particles with a particle size of 0.5-3 micrometers to obtain modified low melting point glass powder.

[0061] Step 2: Weigh the remaining raw material components required for the frosted layer according to the mass proportions, mix them, and heat them to 180℃ until they are in a molten state. Add the modified low-melting-point glass powder obtained in Step 1, and stir thoroughly for 15-20 minutes to obtain the film-forming stock solution. Put the film-forming stock solution into the film-forming machine and set the extrusion temperature to 85℃ to extrude and cast the film. After biaxial stretching and heat setting, the frosted layer film is obtained, and the film thickness is controlled to be 0.2mm.

[0062] Step 3: Cut the frosted film obtained in Step 2 into the shape to be attached. For example, in this embodiment, it is a rectangle with an area equal to or slightly larger than the outer surface area of ​​the glass bottle side wall. Apply an appropriate amount of silane coupling agent KH550 to one side surface of the film, and ensure that no coupling agent liquid overflows when the frosted film is attached to the bottle base.

[0063] Step 4: Mix the raw materials used to make the bottle base evenly, put them into an electric melting furnace, heat to 1450℃ and hold for 24 hours to make the mixture reach a molten state, and obtain sodium-calcium silicate glass melt. Pour the glass melt into a mold, blow it into shape, and then demold it for annealing. The annealing cooling rate is 3-5℃ / min, and the holding time is 1-90min. Specifically, the annealing process in this embodiment is as follows:

[0064] First stage: Hold at 560℃ for 20 minutes; Second stage: Cool down to 300℃ at a rate of 4℃ / min and hold for 120 minutes; Third stage: Cool down to 200℃ at a rate of 4℃ / min and hold for 60 minutes; Fourth stage: Cool down to 175℃ at a rate of 4℃ / min, and lay the frosted film coated with silane coupling agent from step three onto the area of ​​the bottle base that needs frosting. In this embodiment, the film completely covers the outer wall of the bottle base and holds for 3 minutes.

[0065] Step 5: Allow the glass to cool naturally to room temperature to obtain a frosted glass bottle, denoted as Example 1#.

[0066] Examples 2-4

[0067] Examples 2 to 4 were prepared using the preparation method of Example 1. The only difference was that polymethyl ethyl acrylate, polyhydroxyethyl methacrylate, and polyhydroxymethyl methacrylate were used to replace polymethyl methacrylate in the raw material composition of the frosted layer, respectively. The frosted glass bottles obtained were referred to as Examples 2# to 4#.

[0068] A series of frosted glass bottles, designated as Examples 5# to 15#, were prepared using the preparation method of Example 1. The difference lies in the different raw material components or mass fractions of some frosted layers. The specific parameter differences are shown in Table 1. Specifically: Examples 5# and 6# use different amounts of polypropylene; Examples 7#-9# use different nonionic surfactants; Examples 10# to 11# use different polymers to replace polypropylene, and the heating and annealing temperatures, as well as the compatibilizers used, are adjusted accordingly due to the different polymer components; Examples 12# to 15# use a single polymer.

[0069] Comparative Example 1

[0070] Commercially available water-based frosted glass paint was used as a comparative product. Its main components are water-based saturated polyester resin, silica powder, emulsifier, adhesive, and water. The sodium-calcium silicate glass bottle substrate obtained in Example 1 was annealed to room temperature to obtain a transparent glass bottle, which was then cleaned. Following the instructions, an appropriate amount of silane coupling agent KH550 was applied to the outer surface of the glass bottle's sidewall, and then the water-based frosted glass paint was sprayed on, with a coating thickness of 0.2 mm. The bottle was then allowed to air dry naturally for 24–48 hours. The resulting frosted glass bottle is designated as Example D1#.

[0071] Comparative Example 2

[0072] The frosted glass bottle in Example 1 was prepared as follows: The sodium-calcium silicate glass bottle substrate was annealed to room temperature to obtain a transparent glass bottle, which was then cleaned. The transparent glass bottle was then heated to 180°C, covered with a frosted film coated with silane coupling agent KH550, kept at this temperature for 3 minutes, and then allowed to cool naturally to room temperature. The resulting frosted glass bottle is designated as Example D2#.

[0073] 100 samples of frosted glass bottles were prepared from each of the above examples, and their process qualification, adhesion ability, and wear resistance were tested.

[0074] Among them, the detection method for process qualification is as follows: The prepared frosted glass bottle samples are observed one by one at room temperature. If the surface of the frosting layer is flat, the filler distribution is uniform, and there are no film bulges, peeling, blank spots, local wrinkles, or filler agglomeration defects visible to the naked eye, it is a qualified product. If any of the above-mentioned defects exist, it is an unqualified product. The number of qualified products is counted and the percentage of the total number of samples is calculated and recorded as the qualification rate.

[0075] The adhesion ability was tested using a pull-off adhesion tester. The test method is as follows: Five samples are randomly selected from the samples that passed the process qualification. Glass fragments of the same area are cut from the body of the glass bottle with a glass cutter, and then tested with the tester. The average value is taken as the final result.

[0076] The wear resistance was tested using a wear testing machine. The test method uses the internationally common rotating rubber grinding wheel method (500 g, 500 r). Five samples are randomly selected from the samples that passed the process qualification. Glass fragments of the same area are cut from the body of the glass bottle with a glass cutter, and then tested with the tester. The average value is taken as the final result.

[0077] The specific parameters and test results in each of the above examples are shown in Table 1:

[0078] Table 1

[0079]

[0080]

[0081] As shown in Table 1, when the glass bottle sidewalls are made frosted by attaching a frosted film, there are significant differences in the adhesion of polymer films of different materials to the glass bottle substrate and the final frosted effect of the glass bottle. Furthermore, the pass rate of frosted glass bottles made from most single-component low-heat-shrinkage polymers is relatively low. At the same time, the surfactants used to modify the frosted filler also have a significant impact on the film properties, the dispersion of the frosted filler in the frosted layer, and the final frosted effect of the glass bottle. Among these methods, commercially available frosted glass paint (D1#) is prone to defects such as uneven filler distribution and blank spots after spraying, resulting in a poor pass rate. Although it has some adhesion, the adhesion performance is not high, and the wear resistance is poor. The method of heating the glass bottle substrate and then attaching the frosted film (D2#) does not significantly increase the surface energy of the glass after cooling, resulting in a mediocre adhesion rate and effect. Single-component low-heat-shrinkage polymer films (12#~15#) have a significant impact on the success rate of attachment, as well as adhesion and wear resistance, and require further improvement. Incorporating different heat-shrinkage polymers (10#, 11#) or using different surfactants to modify the frosted filler (7#~9#) affects the final pass rate of the frosted glass layer. The adhesion and abrasion resistance are significantly affected and the results vary considerably. However, the preparation process of frosted glass bottles in Examples 1# to 4# has a pass rate of over 90% and significantly enhanced adhesion and abrasion resistance. In this process, the polyacrylic acid resin film has certain adhesion and low fluidity after melting, and can form chemical bonds with the silane coupling agent to improve adhesion stability. An appropriate amount of polypropylene shrinks during the heating process after application to improve the efficiency of the bonding between the polyacrylic acid resin and the coupling agent. The suitable surfactant has a positive effect on the dispersion of the frosted filler in the polymer and the bonding between the coupling agent and the glass substrate. As a result, Examples 1# to 4# show significantly improved process pass rate and mechanical properties, especially Example 3#, which is the most preferred embodiment.

[0082] In addition to the examples listed in Table 1, this experiment also attempted to prepare frosted films using other polymers. However, the properties of the obtained films were not suitable for the frosted glass bottle preparation method provided in the examples. For example, using low-density polyethylene as the polymer substrate resulted in frosted glass bottles with large-area wrinkles, particle agglomeration, and other defects, with a pass rate of less than 10%. Another example is using the anionic surfactant sodium fatty alcohol polyoxyethylene ether sulfate as a modifier for the frosting filler, with polymethyl methacrylate as the polymer substrate. This resulted in defects such as film discoloration and shrinkage during film preparation, making it difficult to produce frosted films.

[0083] Examples 1 to 4 are preferred embodiments. The light transmittance, haze and suitability for printing of the series of frosted glass bottle samples are tested so that the frosted glass bottles can be used for packaging cosmetics, especially mid-to-high-end cosmetics.

[0084] The transmittance and haze were measured using a glass transmittance / haze meter. The method was as follows: Ten frosted glass bottle samples were randomly selected, and glass fragments of equal area were cut from the bottle body using a glass cutter. Five points were randomly selected from one side of the frosted layer for measurement, and the average value was calculated as the final result. The printing pass rate was measured using commercially available water-based printing ink on a screen printing machine. The ink was then cured to obtain the finished printed glass bottle. A pass rate was defined as a clear, unblemished, and ink-free printed pattern; otherwise, it was considered unqualified. Fifty products with acceptable frosting were randomly selected, and the percentage of qualified printed products was calculated as the final result.

[0085] The results are shown in Table 2:

[0086] Table 2

[0087] Example Light transmittance Haze Printing pass rate 1# 90.6％ 30％ 100％ 2# 90.1％ 31％ 98％ 3# 92.5％ 32％ 100％ 4# 89.7％ 29％ 98％ 7# 88.4％ 27％ 88％ 8# 86.2％ 29％ 84％ 9# 87.3％ 28％ 78％ 10# 82.9％ 30％ 82％ 11# 85.4％ 27％ 86％ D1# 86.2％ 26％ 76％

[0088] As shown in Table 2, the frosted glass bottles of preferred embodiments 1# to 4# prepared by the method provided in this application have high light transmittance and suitable haze, and are suitable for ink screen printing, and can be used as packaging products.

[0089] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A frosted glass bottle for cosmetics, characterized in that, include: The bottle base, and a frosted layer covering at least part of the bottle base surface. The base material of the bottle is silicate glass. The frosted layer comprises the following raw materials in parts by weight: 30-60 parts polyacrylate, 5-8 parts polypropylene, 1-5 parts maleic anhydride-grafted polypropylene compatibilizer, 20-40 parts frosting filler, 1-5 parts nonionic surfactant, and 1-10 parts film additives.

2. The frosted glass cosmetic bottle according to claim 1, characterized in that, The polyacrylate is selected from one or more of polymethyl methacrylate, polyethyl methacrylate, polyhydroxymethyl methacrylate, and polyhydroxyethyl methacrylate; And / or, the abrasive filler is selected from low-melting-point glass powder or silica micro powder; And / or, the nonionic surfactant is selected from one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, and glycerol fatty acid esters.

3. The frosted glass cosmetic bottle according to claim 1, characterized in that, The film additives are selected from one or more of plasticizers, stabilizers, antioxidants, diluents, and leveling agents.

4. The frosted glass cosmetic bottle according to claim 1, characterized in that, The silicate glass is selected from sodium-calcium silicate glass or borosilicate glass.

5. The method for preparing a frosted glass cosmetic bottle as described in any one of claims 1-4, characterized in that, Includes the following steps: Step 1: Weigh the abrasive filler and nonionic surfactant according to the mass fractions, mix them evenly and grind them to obtain the modified abrasive filler; Step 2: Weigh the remaining raw material components required for the frosted layer according to the mass proportions, mix and heat until melted, add the modified frosted filler obtained in Step 1 and stir thoroughly to obtain the film-forming stock solution; put the film-forming stock solution into the film-forming machine to extrude and cast the film, and then obtain the frosted layer film after biaxial stretching and heat setting. Step 3: Cut the frosted film into the shape to be attached, and apply silane coupling agent to one side of the film surface; Step 4: Shape the molten silicate glass liquid into a bottle base, and then anneal it. When the annealing temperature is 5-20°C higher than the film melting temperature, lay the frosted film coated with silane coupling agent in Step 3 on the frosted area of ​​the bottle base and keep it warm for 1-10 minutes. Step 5: Allow the glass to cool naturally to room temperature to obtain the frosted glass bottle.

6. The preparation method according to claim 5, characterized in that, In step one, the modified abrasive filler obtained by grinding has a particle size of 0.5 to 3 micrometers.

7. The preparation method according to claim 5, characterized in that, In step two, the extrusion temperature of the film forming machine is set to 80-95℃.

8. The preparation method according to claim 5, characterized in that, In step two, the thickness of the frosted film is 0.1-0.5 mm.

9. The preparation method according to claim 5, characterized in that, In step three, the silane coupling agent is selected from one or more of KH550, KH560, KH602, and KH792.

10. The preparation method according to claim 5, characterized in that, In step four, the annealing process is carried out in two to five stages, starting from the annealing temperature, to slowly cool down and hold the temperature.

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