Efficient and mild tooth whitening strip and preparation method thereof

Abstract

The invention discloses an efficient and mild tooth whitening patch and a preparation method thereof.The tooth whitening patch comprises a protective film layer, a release film layer and a gel layer located between the protective film layer and the release film layer, and the gel layer is a gel material prepared by mixing a phase A, a phase B, a phase C, a phase D and a phase E; by optimizing a stable system and a compatibility relation, the chemical stability of hydrogen peroxide is remarkably improved, the irritation of hydrogen peroxide to teeth and gingiva is reduced, meanwhile, the whitening effect and the use safety are considered, and the oral care product is excellent in performance and good in user experience; in the preparation process, the steps of accurate temperature control, efficient homogenizing, vacuum defoaming and filtering are adopted, material particles, caking and film bubbles are effectively eliminated, and it is ensured that the product is uniform in texture and smooth in appearance.

Description

Technical Field

[0001] This invention belongs to the field of oral care technology, and in particular relates to a highly effective and gentle teeth whitening strip and its preparation method. Background Technology

[0002] Existing whitening strip formulations have significant limitations, restricting their final whitening effect and user experience. Some formulations that attempt to add hydrogen peroxide suffer from serious defects due to imperfect system construction: poor component stability, with hydrogen peroxide easily decomposing and becoming ineffective during storage, resulting in a short product shelf life and a sharp reduction in whitening efficacy; furthermore, the strong irritant nature of this ingredient often triggers oral mucosa reactions, causing tooth sensitivity, gum pain, and even allergies. In addition, existing formulations generally do not adequately consider adhesion and compatibility, resulting in weak bonding between the strip and the substrate, uneven distribution of active ingredients, directly leading to poor adhesion, easy detachment, and inconsistent whitening agent concentration received by each tooth, ultimately resulting in a patchy and uneven whitening effect.

[0003] In terms of preparation technology, existing production methods also have several shortcomings: First, the mixing process relies heavily on manual or simple mechanical stirring, resulting in low mixing efficiency, easy introduction of air bubbles, and clumping of thickeners and other raw materials into hard, insoluble particles. Second, the lack of precise temperature control and homogenization steps makes it impossible to ensure material uniformity, resulting in visible particles or gel clumps in the finished product. Furthermore, the production process generally lacks vacuum degassing and filtration, leaving a large number of microbubbles and undissolved particles in the membrane layer. This not only affects the product's appearance and texture but also reduces the membrane's strength, making it prone to tearing during use. Additionally, air bubbles can hinder the contact between the active ingredients and teeth, further weakening the whitening effect.

[0004] Therefore, the shortcomings of existing technologies in both the formulation design and manufacturing process of teeth whitening strips restrict the product quality and safety of teeth whitening strips, and a new formulation and process solution is urgently needed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a highly efficient and gentle teeth whitening strip and its preparation method. By optimizing the stable system and compatibility, the chemical stability of hydrogen peroxide is significantly improved, reducing its irritation to teeth and gums. Furthermore, the preparation process employs precise temperature control, efficient homogenization, vacuum degassing, and filtration steps, effectively eliminating material particles, clumps, and air bubbles in the membrane layer.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A highly effective and gentle teeth whitening strip, comprising a protective film layer, a release film layer, and a gel material located between the two, wherein the gel layer is a gel material prepared by mixing phase A, phase B, phase C, phase D, and phase E;

[0008] Phase A includes water, humectant, and stabilizer;

[0009] Phase B includes a film-forming agent and a penetration enhancer;

[0010] Phase C includes bleaching agents, sweeteners, and cooling agents;

[0011] Phase D includes fragrance and pH adjuster;

[0012] Phase E includes plant extracts, anti-allergen A, and anti-allergen B.

[0013] Preferably, phase A comprises the following components by weight percentage: water balance, humectant 5-15%, and stabilizer 0.5-1%;

[0014] Phase B comprises the following components by weight percentage: film-forming agent 15-30%, penetration enhancer 15-25%;

[0015] Phase C comprises the following components by weight percentage: bleaching agent 5-15%, sweetener 0.05-0.2%, and cooling agent 0.1-0.5%;

[0016] Phase D comprises the following components by weight percentage: fragrance 0.1-0.5%, pH adjuster 0.1-0.5%;

[0017] Phase E comprises the following components by weight percentage: plant extract 0.01~0.05%, anti-allergen A 0.5~2%, and anti-allergen B 0.05~0.5%.

[0018] Preferably, the humectant in phase A is glycerin, and the stabilizer is ammonium acryloyldimethyltaurate / VP copolymer;

[0019] The film-forming agent in phase B is polyvinylpyrrolidone, and the penetration enhancer is ethanol;

[0020] The bleaching agent in phase C is hydrogen peroxide, the sweetener is sucralose, and the cooling agent is WS-23;

[0021] The flavoring in phase D is an edible flavoring, and the pH adjuster is citric acid.

[0022] The plant extract in phase E is European chamomile extract, anti-allergy agent A is potassium nitrate, and anti-allergy agent B is strontium chloride.

[0023] A method for preparing a highly effective and gentle teeth whitening strip includes the following steps:

[0024] Step S1: Mix the components of phase A, phase B, phase C, phase D and phase E in proportion to obtain a gel material;

[0025] Step S2: Combine the gel material obtained in step S1 with the protective film layer and the release film layer, and then use a dental strip manufacturing equipment to sequentially coat, dry, coat, cut, punch, and remove waste material to produce several single dental strips.

[0026] Step S3: Pack several individual dental strips into packaging with good barrier properties, such as aluminum foil bags, for final inspection and then put them into storage.

[0027] Preferably, the preparation of the gel material includes the following steps:

[0028] Step A1: Prepare purified water using a pure water machine and set aside. Add the purified water and other raw materials in phase A to the emulsification pot in proportion, heat to 80~90℃, homogenize for 5~10 minutes, and stir until there are no particles.

[0029] Step A2: Weigh out the B phase raw material according to the ratio and soak it in advance until it is transparent and free of particles. Then put it into the emulsification pot, keep the temperature between 65~75℃, homogenize for 5-10 minutes, and stir until there are no particles.

[0030] Step A3: Cool the emulsifying pot to 50~60℃ and maintain it. Then weigh out the C phase, D phase and E phase raw materials according to the ratio and add them to the emulsifying pot in sequence. Homogenize for 5-10 minutes and stir until there are no particles.

[0031] Step A4: Cool the emulsifying pot to 40~50℃, check the pH value, and add pH adjuster as needed to make the final mixture pH value 6.5~7.5;

[0032] Step A5: Maintain the temperature of the emulsifying pot at 40~50℃, vacuum the mixture to remove air bubbles, and after passing the sensory inspection, filter the mixture through a 60 to 100 mesh filter cloth to obtain the gel material.

[0033] More preferably, the pH adjuster in step A4 is an acidic compound, an alkaline compound, or a combination thereof; the acidic compound is one of citric acid, lactic acid, and sodium dihydrogen phosphate; and / or, the alkaline adjuster is one of triethanolamine, sodium hydroxide, and sodium bicarbonate.

[0034] Preferably, the preparation of the single-piece dental strip includes the following steps:

[0035] Step B1: The filtered gel material is evenly coated onto the release film using a coating mechanism;

[0036] Step B2: The release film coated with gel material is dried by a drying mechanism to evaporate the moisture or solvent of the gel material and form a gel layer with a certain strength and viscosity.

[0037] Step B3: Another PET film is applied to the dried gel layer using a laminating mechanism to form a three-layer structure consisting of a protective film layer, a gel layer, and a release film layer. Finally, the structure is rolled up to obtain a large roll of dental veneer material. During the lamination process, air is removed and the surface is embossed.

[0038] Step B4: According to the product design dimensions, the large roll of veneer material is cut into smaller rolls of veneer material of a specified width using a slitting mechanism;

[0039] Step B5: The small roll of dental sticker material is stamped into pieces of a predetermined shape using a die stamping mechanism. At the same time, the mesh-like waste generated after stamping is collected and removed by a waste collection mechanism to obtain several individual dental stickers.

[0040] More preferably, in step B1, the coating thickness of the gel material on the release film is 0.5~1mm, and the coating width is 55~60cm.

[0041] More preferably, in step B2, the drying temperature is 60~75℃ and the drying time is 10~15min.

[0042] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0043] (1) The gel layer in the whitening strip of the present invention is a composite film-forming system composed of polyvinylpyrrolidone and ammonium acryloyldimethyl taurate / VP copolymer, which significantly enhances the strength of the gel layer and its adhesion to the teeth, making it less likely to fall off; In terms of whitening, ethanol as a penetration enhancer effectively improves the penetration efficiency of hydrogen peroxide into the enamel, and citric acid precisely adjusts the pH of the system and stabilizes it in a weakly acidic environment, which not only ensures the stability of hydrogen peroxide to extend the product's shelf life, but also enhances the safety of use. At the same time, combined with potassium nitrate, it significantly reduces dental nerve sensitivity while effectively whitening, improving the user experience; In addition, the combination of European basil extract and potassium nitrate further enhances the anti-sensitivity and soothing effect through the dual pathways of plant anti-inflammatory and physical blockage.

[0044] (2) The preparation method of the present invention significantly improves the overall performance of the product through multi-stage precise temperature control homogenization, vacuum degassing and precise pH adjustment. The final gel material has extremely high uniformity, bubble-free appearance and stable pH value. This not only ensures the comfort of the dental strip during application and the uniform release of active ingredients, but also greatly improves the appearance quality and safety of the product. Moreover, it uses an integrated emulsification pot to complete multiple core steps, effectively reducing human operation errors and material transfer, thereby significantly improving production efficiency and batch stability while ensuring high-quality output. Detailed Implementation

[0045] To better illustrate the objectives, technical solutions, and advantages of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the following embodiments are only some embodiments of the present invention, and not all embodiments; it should be understood that the embodiments of the present invention are only used to illustrate the technical effects of the present invention, and are not intended to limit the scope of protection of the present invention.

[0046] An embodiment of the present invention provides a highly efficient and gentle teeth whitening strip, which includes a protective film layer, a release film layer, and a gel material located between the two. The gel layer is a gel material prepared by mixing phases A, B, C, D, and E.

[0047] Phase A includes water, humectant, and stabilizer;

[0048] Phase B includes a film-forming agent and a penetration enhancer;

[0049] Phase C includes bleaching agents, sweeteners, and cooling agents;

[0050] Phase D includes fragrance and pH adjuster;

[0051] Phase E includes plant extracts, anti-allergen A, and anti-allergen B.

[0052] Specifically, phase A comprises the following components by weight percentage: water balance, humectant 5-15%, and stabilizer 0.5-1%;

[0053] Phase B comprises the following components by weight percentage: film-forming agent 15-30%, penetration enhancer 15-25%;

[0054] Phase C comprises the following components by weight percentage: bleaching agent 5-15%, sweetener 0.05-0.2%, and cooling agent 0.1-0.5%;

[0055] Phase D comprises the following components by weight percentage: fragrance 0.1-0.5%, pH adjuster 0.1-0.5%;

[0056] Phase E comprises the following components by weight percentage: plant extract 0.01~0.05%, anti-allergen A 0.5~2%, and anti-allergen B 0.05~0.5%.

[0057] Specifically, the water in phase A is purified water, the humectant is glycerin, and the stabilizer is ammonium acryloyl dimethyl taurate / VP copolymer (AVC).

[0058] The film-forming agent in phase B is polyvinylpyrrolidone (PVP K30), and the penetration enhancer is 95% ethanol.

[0059] The bleaching agent in phase C is hydrogen peroxide (H2O2), which is derived from a 35% commercially available aqueous solution of hydrogen peroxide. The sweetener is sucralose, and the cooling agent is WS-23.

[0060] The flavoring in phase D is food flavoring of model TF11659, and the pH adjuster is citric acid;

[0061] The plant extract in phase E is European chamomile extract, anti-allergy agent A is potassium nitrate, and anti-allergy agent B is strontium chloride.

[0062] The components of the gel material in the whitening teeth strips of this invention can be divided into essential components and optional components according to their functions, as shown in Table 1 below:

[0063]

[0064] Table 1

[0065] The gel material in the teeth whitening strips of this invention produces a significant synergistic effect through the compounding of specific components. The key synergistic combination and synergistic principle are shown in Table 2 below:

[0066]

[0067] Table 2

[0068] This invention also provides a method for preparing a highly effective and gentle teeth whitening strip, comprising the following steps:

[0069] Step S1: Mix the components of phase A, phase B, phase C, phase D and phase E in proportion to obtain a gel material;

[0070] Step S2: Combine the gel material obtained in step S1 with the protective film layer and the release film layer, and then use a dental strip manufacturing equipment to sequentially coat, dry, coat, cut, punch, and remove waste material to produce several single dental strips.

[0071] Step S3: Pack several individual dental strips into packaging with good barrier properties, such as aluminum foil bags, for final inspection and then put them into storage.

[0072] The preparation of the gel material includes the following steps:

[0073] Step A1: Prepare purified water using a pure water machine and set aside. Add the purified water and other raw materials in phase A to the emulsification pot in proportion, heat to 80~90℃, homogenize at medium to high speed for 5~10 minutes, and stir until there are no particles.

[0074] Step A2: Weigh out the B phase raw material according to the ratio and soak it in advance until it is transparent and free of particles. Then put it into the emulsification pot, keep the temperature between 65~75℃, homogenize at medium and high speed for 5-10 minutes, and stir until there are no particles.

[0075] Step A3: Cool the emulsifying pot to 50~60℃ and maintain it. Then weigh out the C phase, D phase and E phase raw materials according to the ratio and add them to the emulsifying pot in sequence. Homogenize for 5-10 minutes and stir until there are no particles.

[0076] Step A4: Cool the emulsifying pot to 40~50℃, check the pH value, add pH adjuster as needed, and mix in with low speed to make the final mixture pH value 6.5~7.5;

[0077] Step A5: Maintain the temperature of the emulsifying pot at 40~50℃, vacuum the mixture to remove air bubbles, and after passing the sensory inspection, filter the mixture through a 60 to 100 mesh filter cloth to obtain the gel material.

[0078] Specifically, the pH adjuster in step A4 is an acidic compound, an alkaline compound, or a combination thereof; the acidic compound is one of citric acid, lactic acid, and sodium dihydrogen phosphate, used to lower the pH value (adjust acidity); and / or, the alkaline adjuster is one of triethanolamine, sodium hydroxide, and sodium bicarbonate, used to raise the pH value (adjust alkalinity); the specific addition of an acidic compound or an alkaline compound, or none at all, depends on the acidity or alkalinity of the material.

[0079] The preparation of the single-piece dental strip includes the following steps:

[0080] Step B1: The filtered gel material is evenly coated onto the release film using a coating mechanism. The coating thickness is 0.5~1mm and the coating width is 55~60cm.

[0081] Step B2: The release film coated with gel material is dried by a drying device to evaporate the moisture or solvent of the gel material and form a gel layer with a certain strength and viscosity. The drying temperature is 60~75℃ and the drying time is 10~15min to avoid the failure of active ingredients or blistering of the film layer.

[0082] Step B3: Another PET film is applied to the dried gel layer using a laminating mechanism to form a three-layer structure consisting of a protective film layer, a gel layer, and a release film layer. Finally, the structure is rolled up to obtain a large roll of dental veneer material. During the lamination process, air is removed and the surface is embossed.

[0083] Step B4: According to the product design dimensions, the large roll of veneer material is cut into smaller rolls of veneer material of a specified width using a slitting mechanism;

[0084] Step B5: The small roll of dental sticker material is stamped into pieces of a predetermined shape using a die stamping mechanism. At the same time, the mesh-like waste generated after stamping is collected and removed by a waste collection mechanism to obtain several individual dental stickers.

[0085] This preparation method significantly improves the overall performance of the product through multi-stage precise temperature control for homogenization, vacuum degassing, and precise pH adjustment. The resulting gel material has extremely high uniformity, a bubble-free appearance, and a stable pH value. This not only ensures the comfort of the dental strips during application and the uniform release of active ingredients, but also greatly improves the product's appearance quality and safety.

[0086] Furthermore, this preparation method utilizes an integrated emulsifying pot to complete multiple core steps, effectively reducing human error and material transfer, thereby significantly improving production efficiency and batch stability while ensuring high-quality output.

[0087] The present invention will be further described below with reference to specific embodiments:

[0088] Example 1 (Optimal Balanced Type):

[0089] The gel layer is a gel material prepared by mixing phases A, B, C, D and E;

[0090] Phase A comprises the following components by weight percentage: water balance, glycerol 10%, ammonium acryloyl dimethyl taurate / VP copolymer (AVC) 1%;

[0091] Phase B comprises the following components by weight percentage: 25% polyvinylpyrrolidone (PVP K30) and 20% ethanol;

[0092] The C phase comprises the following components by weight percentage: hydrogen peroxide (H2O2) 10%, sucralose 0.1%, and WS-23 0.3%;

[0093] The D phase comprises the following components by weight percentage: fragrance (TF11659) 0.3%, citric acid 0.3%;

[0094] Phase E comprises the following components by weight percentage: 0.03% European chamomile extract, 1% potassium nitrate, and 0.1% strontium chloride.

[0095] Example 2 (Enhanced Whitening Type):

[0096] The weight percentage of hydrogen peroxide (H2O2) in the C phase is 12%;

[0097] The weight percentage of potassium nitrate in phase E is 0.5%;

[0098] The weight percentages of the other components in phases A, B, C, D, and E are as described in the most preferred balance form of Example 1 above.

[0099] Example 3 (Anti-allergic and soothing type):

[0100] The weight percentage of hydrogen peroxide (H2O2) in the C phase is 6%;

[0101] The E phase contains 0.1% by weight of chamomile extract, 1% by weight of potassium nitrate, and 0.1% by weight of strontium chloride.

[0102] The weight percentages of the other components in phases A, B, C, and D are as described in the most preferred balance form of Example 1 above.

[0103] Comparative example (without H2O2):

[0104] Remove hydrogen peroxide (H2O2) from phase C and increase the ratio of glycerol to water;

[0105] The weight percentages of the other components in phases A, B, C, D, and E are as described in the most preferred balance form of Example 1 above.

[0106] According to the preparation method of the above-described teeth whitening strips, and in accordance with the gel material ratios in Examples 1-3 and the comparative examples, corresponding teeth whitening strip samples were prepared, and relevant effect verification tests were conducted respectively:

[0107] 1. Laboratory testing (dental model color difference ΔE test)

[0108] (1) Test method:

[0109] (1.1) Specimen: Standard dental mold (such as cow tooth or ceramic dental mold), artificially stained by soaking in coffee / tea solution to form stable exogenous stains.

[0110] (1.2) Process: After cutting the dental strip samples of Examples 1-3 and the comparative examples, they were attached to the surface of the dental mold and placed in a constant temperature and humidity environment of 37°C to simulate oral conditions; once a day for 30 minutes each time.

[0111] (1.3) Measurement: Use a colorimeter to measure the L*a*b* values ​​of the dental mold at specific time points (before use, 3 days, 7 days, and 14 days after use), and calculate the color difference ΔE. The calculation formula is as follows;

[0112] Formula for calculating △E: △E = √[(△L*)² + (△a*)² + (△b*)²];

[0113] in:

[0114] △L* represents the difference in brightness (Standard sample L* - Test sample L*);

[0115] △a* represents the difference between the red and green axes (standard sample a* - test sample a*);

[0116] △b* represents the difference between the yellow and blue axes (standard sample b* - test sample b*).

[0117] (2) Test results:

[0118] Table 3 below shows the changes in color difference (ΔE) of dental molds over time for different embodiments and comparative examples. The larger the value, the more significant the whitening effect.

[0119]

[0120] Table 3

[0121] in conclusion:

[0122] The whitening effect of the teeth whitening strip sample of Example 1 (optimal balanced type) is between that of Examples 2 and 3, demonstrating balanced performance.

[0123] The teeth whitening strip sample of Example 2 (high-efficiency whitening type) showed the fastest increase in ΔE value and the highest final value throughout the entire testing period, proving its strong ability to remove yellowing and whiten teeth.

[0124] The whitening effect of the sample in Example 3 (anti-sensitivity and soothing type) was slower due to its lower H2O2 content, but it still achieved a visible improvement after 14 days of use (△E> 5).

[0125] The ΔE value of the comparative sample (without H2O2) showed negligible change, which proves that H2O2 is the core essential component for whitening efficacy.

[0126] 2. Consumer testing (14-day user satisfaction questionnaire)

[0127] 120 volunteers (including those with mild to moderate tooth sensitivity) were recruited and divided into three groups. They used Example 1, 2, and 3 respectively, once a day for 14 days.

[0128] After the test, participants filled out a satisfaction questionnaire (5-point scale: 1 = very dissatisfied, 5 = very satisfied). The test results are shown in Table 4 below.

[0129]

[0130] Table 4 Note: Higher scores result in better performance.

[0131] in conclusion:

[0132] Whitening effect: The teeth whitening strip sample in Example 2 achieved the highest score, which was highly consistent with the laboratory ΔE test results.

[0133] Anti-sensitivity ability: The teeth whitening strip samples of Examples 1 and 3 scored significantly higher than the teeth whitening strip sample of Example 2 in "satisfaction with anti-sensitivity effect", which proves that the combination of potassium nitrate and European chamomile extract can effectively reduce the discomfort that high concentration of H2O2 may cause, resulting in a better user experience.

[0134] Overall satisfaction: The teeth whitening strip sample of Example 1 achieved the best balance between whitening, comfort and anti-sensitivity, thus obtaining the highest overall satisfaction. This indicates that the optimal balance of formula that combines efficacy and gentleness best meets market demand.

[0135] 3. pH value test

[0136] A pH meter was used to measure the pH of the teeth whitening strip samples in each embodiment to ensure that the product was within a mild pH range and to avoid damage to tooth enamel. The test results are shown in Table 5 below:

[0137]

[0138] Table 5

[0139] Summary and supporting evidence: Through the above systematic functional testing, the following conclusions can be clearly drawn, which strongly support the advantages of the dental strip formula of this invention;

[0140] (1) Clear efficacy: Laboratory ΔE data and consumer whitening satisfaction both prove that the gel formula in this teeth whitening strip has a significant teeth whitening and yellowing removal effect, and its core driving force is hydrogen peroxide (H2O2).

[0141] (2) Anti-sensitivity: Consumer tests show that the gel formula in the teeth whitening strips, by introducing potassium nitrate, strontium chloride and European chamomile extract, can effectively relieve tooth sensitivity, especially in the teeth whitening strip samples of Examples 1 and 2 of this invention, realizing the consumer demand of "whitening without damaging teeth".

[0142] (3) Outstanding Advantages of Formula Balance: The teeth whitening strip sample of Example 1 (Optimal Balance Type) showed the best comprehensive test performance; it achieved a whitening effect close to that of Example 2 (Strong Whitening Type) in the laboratory (14-day ΔE=7.6), while in consumer testing it obtained a low sensitivity score (4.4) similar to that of Example 3 (Anti-sensitivity and Soothing Type) and the highest overall satisfaction (4.7). This proves that through scientific ingredient matching (such as the synergy of H2O2 and potassium nitrate, and the film-forming synergy of PVP and AVC), a whitening strip product with the best comprehensive performance can be created.

[0143] (4) High safety: pH test results show that all the whitening strip formulas of this invention are in the weakly acidic to neutral range that is safe for tooth enamel, and the products are gentle.

[0144] In summary, these test data together form a complete chain of evidence, demonstrating the outstanding advantages of the teeth whitening strip formula of this invention in terms of efficacy, gentleness, and user experience. It achieves a balance between highly effective whitening, significant anti-sensitivity, and gentle safety, making it a high-performance oral care product with an excellent user experience.

[0145] The embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A highly effective and gentle teeth whitening strip, characterized in that, The teeth whitening strips include a protective film layer, a release film layer, and a gel layer located between the two. The gel layer is a gel material prepared by mixing phases A, B, C, D, and E. Phase A includes water, humectant, and stabilizer; Phase B includes a film-forming agent and a penetration enhancer; Phase C includes bleaching agents, sweeteners, and cooling agents; Phase D includes fragrance and pH adjuster; Phase E includes plant extracts, anti-allergen A, and anti-allergen B.

2. The highly efficient and gentle teeth whitening strip according to claim 1, characterized in that, Phase A comprises the following components by weight percentage: water balance, humectant 5-15%, and stabilizer 0.5-1%; Phase B comprises the following components by weight percentage: film-forming agent 15-30%, penetration enhancer 15-25%; Phase C comprises the following components by weight percentage: bleaching agent 5-15%, sweetener 0.05-0.2%, and cooling agent 0.1-0.5%; Phase D comprises the following components by weight percentage: fragrance 0.1-0.5%, pH adjuster 0.1-0.5%; Phase E comprises the following components by weight percentage: plant extract 0.01~0.05%, anti-allergen A 0.5~2%, and anti-allergen B 0.05~0.5%.

3. The highly efficient and gentle teeth whitening strip according to claim 2, characterized in that, The humectant in phase A is glycerin, and the stabilizer is ammonium acryloyldimethyltaurate / VP copolymer; The film-forming agent in phase B is polyvinylpyrrolidone, and the penetration enhancer is ethanol; The bleaching agent in phase C is hydrogen peroxide, the sweetener is sucralose, and the cooling agent is WS-23; The flavoring in phase D is an edible flavoring, and the pH adjuster is citric acid. The plant extract in phase E is European chamomile extract, anti-allergy agent A is potassium nitrate, and anti-allergy agent B is strontium chloride.

4. A method for preparing a highly efficient and gentle teeth whitening strip according to any one of claims 1-3, characterized in that, Includes the following steps: Step S1: Mix the components of phase A, phase B, phase C, phase D and phase E in proportion to obtain a gel material; Step S2: Combine the gel material obtained in step S1 with the protective film layer and the release film layer, and then use a dental strip manufacturing equipment to sequentially coat, dry, coat, cut, punch, and remove waste material to produce several single dental strips. Step S3: Pack several individual dental strips into packaging with good barrier properties, such as aluminum foil bags, for final inspection and then put them into storage.

5. The method for preparing the highly efficient and gentle teeth whitening strips according to claim 4, characterized in that, The preparation of the gel material includes the following steps: Step A1: Prepare purified water using a pure water machine and set aside. Add the purified water and other raw materials in phase A to the emulsification pot in proportion, heat to 80~90℃, homogenize for 5~10 minutes, and stir until there are no particles. Step A2: Weigh out the B phase raw material according to the ratio and soak it in advance until it is transparent and free of particles. Then put it into the emulsification pot, keep the temperature between 65~75℃, homogenize for 5-10 minutes, and stir until there are no particles. Step A3: Cool the emulsifying pot to 50~60℃ and maintain it. Then weigh out the C phase, D phase and E phase raw materials according to the ratio and add them to the emulsifying pot in sequence. Homogenize for 5-10 minutes and stir until there are no particles. Step A4: Cool the emulsifying pot to 40~50℃, check the pH value, and add pH adjuster as needed to make the final mixture pH value 6.5~7.5; Step A5: Maintain the temperature of the emulsifying pot at 40~50℃, vacuum the mixture to remove air bubbles, and after passing the sensory inspection, filter the mixture through a 60 to 100 mesh filter cloth to obtain the gel material.

6. The method for preparing the highly efficient and gentle teeth whitening strips according to claim 5, characterized in that, The pH adjuster in step A4 is selected from acidic compounds, basic compounds, or combinations thereof; the acidic compound is one of citric acid, lactic acid, and sodium dihydrogen phosphate; and / or, the basic adjuster is one of triethanolamine, sodium hydroxide, and sodium bicarbonate.

7. The method for preparing the highly efficient and gentle teeth whitening strips according to claim 4, characterized in that, The preparation of a single dental strip includes the following steps: Step B1: The filtered gel material is evenly coated onto the release film using a coating mechanism; Step B2: The release film coated with gel material is dried by a drying mechanism to evaporate the moisture or solvent of the gel material and form a gel layer with a certain strength and viscosity. Step B3: Another PET film is applied to the dried gel layer using a laminating mechanism to form a three-layer structure consisting of a protective film layer, a gel layer, and a release film layer. Finally, the structure is rolled up to obtain a large roll of dental veneer material. During the lamination process, air is removed and the surface is embossed. Step B4: According to the product design dimensions, the large roll of veneer material is cut into smaller rolls of veneer material of a specified width using a slitting mechanism; Step B5: The small roll of dental sticker material is stamped into pieces of a predetermined shape using a die stamping mechanism. At the same time, the mesh-like waste generated after stamping is collected and removed by a waste collection mechanism to obtain several individual dental stickers.

8. The method for preparing the highly efficient and gentle teeth whitening strips according to claim 7, characterized in that, In step B1, the coating thickness of the gel material on the release film is 0.5~1mm, and the coating width is 55~60cm.

9. The method for preparing the highly efficient and gentle teeth whitening strips according to claim 7, characterized in that, In step B2, the drying temperature is 60~75℃ and the drying time is 10~15min.

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