Antibacterial impregnated paper and method of making same

Abstract

The present application relates to the technical field of bacteriostatic impregnated paper preparation, and discloses a bacteriostatic impregnated paper and a preparation method thereof, wherein a melamine impregnated paper substrate is impregnated with an impregnating solution; a rate regulating coating is coated on the surface of the substrate, so that the release rate of the bacteriostatic component is regulated according to the change of environmental pH value; wherein the surface of the rate regulating coating is further coated with a nano-silver particle layer, and the components of the impregnating solution include the following raw materials in percentage by weight: tea tree oil 0.5-2%, cinnamaldehyde 1-3%, lemon essential oil 0.5-1%, ethanol 70-80% and water; the present application provides a multi-layer protection mechanism, which can not only effectively kill various bacteria and fungi, but also prolong the duration of the bacteriostatic effect; the presence of the nano-silver particle layer enhances the long-term bacteriostatic effect, and even after long-term use, the high-efficiency antibacterial performance can be maintained; the introduction of the pH-sensitive polymer coating enables the release rate of the bacteriostatic component to be automatically regulated according to the change of environmental pH value.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial impregnated paper preparation, in particular to antibacterial impregnated paper and a preparation method thereof. Background Art

[0002] The preparation of antibacterial impregnated paper refers to the process of evenly distributing substances with antibacterial properties (such as natural extracts, synthetic compounds, etc.) on paper or other substrates through a specific process, thereby giving the paper antibacterial functions. However, the antibacterial components in traditional antibacterial impregnated paper will gradually lose their effectiveness over time or with changes in environmental conditions (temperature, humidity). At the same time, traditional antibacterial impregnated paper is only effective against specific types of bacteria or fungi and has poor effects on other microorganisms, resulting in its unstable and short-lasting antibacterial effect, which limits its wide application in various application scenarios and reduces its overall antibacterial performance. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] In one aspect, an antibacterial impregnated paper is provided, comprising:

[0006] A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid;

[0007] A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to changes in the environmental pH value;

[0008] Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0009] The components of the immersion liquid include the following raw materials in weight percentage: 0.5-2% tea tree oil, 1-3% cinnamaldehyde, 0.5-1% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the immersion liquid does not exceed 5%, 70-80% ethanol and water.

[0010] As a further solution of the present invention: the impregnation solution also includes 1% chitosan.

[0011] As a further aspect of the present application, the rate regulating coating is a pH sensitive polymer coating which accelerates the release of the bacteriostatic component when the pH value is below 6 and slows down the release of the bacteriostatic component when the pH value is above 7.5.

[0012] As a further aspect of the present application, the pH sensitive polymer coating is selected from one or more of polyacrylic acid, polymethacrylate or their copolymers, and further comprises 0.1-0.3% of a photosensitizer to increase the responsiveness to ultraviolet light.

[0013] Another aspect of the present application provides a preparation method, comprising:

[0014] Preparing the substrate and pretreating it;

[0015] Fully infiltrating the solution into the substrate using an impregnation method;

[0016] Coating the rate regulating coating and the nano-silver particle layer on the surface of the substrate;

[0017] After drying, obtaining the finished bacteriostatic impregnated paper.

[0018] As a further aspect of the present application, the pretreatment includes degreasing, bleaching and drying the substrate, and further includes using ultrasonic treatment to improve the porosity and uniformity of the substrate.

[0019] Further, an ultrasonic cleaning machine is used, the frequency is set to 2-40 kHz,

[0020] The power is set to 50-200 W, and the processing time is set to 0.5-1 hour;

[0021] Operation steps:

[0022] Put the dried substrate into the water tank of the ultrasonic cleaning machine;

[0023] Add an appropriate amount of deionized water or special cleaning solution;

[0024] Set the ultrasonic frequency and power;

[0025] Start the ultrasonic cleaning machine and process for 0.5-1 hour;

[0026] After the processing is completed, take out the substrate and rinse it clean with clean water;

[0027] Air dry or low-temperature dry the substrate in an oven under ventilation conditions;

[0028] The ultrasonic treatment can effectively remove the tiny bubbles inside the substrate through cavitation effect generated by high-frequency vibration, increase the porosity, make the substrate structure more uniform, and the treatment can also break the surface tension of the substrate, promoting the infiltration of the subsequent solution.

[0029] As a further aspect of the present application: the dipping time is 0.5-2 hours, and a weak electric field is applied during the dipping process to promote uniform distribution of the bacteriostatic ingredients.

[0030] Further, an electric field generator is used, the electric field strength is set to 10-50 V / cm, and a pair of parallel electrodes is arranged in the dipping tank to ensure uniform distribution of the electric field. The specific steps are as follows:

[0031] Pour the prepared bacteriostatic solution into the dipping tank

[0032] Put the pretreated substrate into the dipping tank;

[0033] Connect the electric field generator and set the appropriate electric field strength;

[0034] Start the electric field generator and apply a weak electric field while performing the dipping process;

[0035] The dipping time is 0.5-2 hours, and the specific time can be adjusted according to experimental results;

[0036] After dipping is completed, take out the substrate and gently squeeze out excess liquid;

[0037] Place the substrate in a drying device and dry at a temperature of 60-80℃ for 1-3 hours. Infrared heating can be used to improve drying efficiency and quality;

[0038] The use of a weak electric field can make the charged bacteriostatic molecules more uniformly distributed in the substrate through electrophoresis, thereby improving the dipping effect.

[0039] As a further aspect of the present application: the finished product obtained after drying, wherein the drying temperature is 60-80℃, the drying time is 1-3 hours, and infrared heating is used during the drying process to improve drying efficiency and quality.

[0040] As a further aspect of the present application: the method further includes setting an identification area on the final product to indicate the current bacteriostatic efficacy status, the identification area is made of a temperature-sensitive color-changing material that changes color when the temperature exceeds 30℃, and further includes a UV-sensitive label that displays a different color when exposed to ultraviolet light.

[0041] Another aspect of the present application provides an application of bacteriostatic dipped paper, which is used on the surface of furniture, and is particularly suitable for object surfaces with strict antibacterial requirements.

[0042] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides an antibacterial impregnated paper and its preparation method and application, which can not only effectively kill a variety of bacteria and fungi, but also prolong the duration of the antibacterial effect. The presence of the nanosilver particle layer enhances the long-term antibacterial effect and can maintain high antibacterial performance even after long-term use. The introduction of the pH-sensitive polymer coating enables the release rate of the antibacterial component to be automatically adjusted according to changes in the environmental pH value. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments. Example 1

[0046] This is the first embodiment of the present invention, which provides the preparation of multifunctional antibacterial impregnated paper and the antibacterial performance test thereof, as follows:

[0047] The antibacterial impregnated paper comprises:

[0048] A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid;

[0049] A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to changes in the environmental pH value;

[0050] Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0051] The components of the impregnation liquid include the following raw materials in weight percentage: 1.0% tea tree oil, 2.0% cinnamaldehyde, 0.8% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the impregnation liquid does not exceed 5%, 75% ethanol, 1% chitosan and the balance water.

[0052] The rate regulating coating is a pH sensitive polymer coating, which accelerates the release of antibacterial components when the pH value is lower than 6 and slows down the release of antibacterial components when the pH value is higher than 7.5.

[0053] The pH sensitive polymer coating is selected from polyacrylic acid and further comprises a photosensitizer accounting for 0.1% of the mass of the polyacrylic acid.

[0054] Here are the steps:

[0055] Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 minutes to improve porosity and uniformity;

[0056] Solution preparation: Dissolve tea tree oil, cinnamaldehyde, lemon essential oil, and chitosan in a mixed solvent of ethanol and water and stir evenly;

[0057] Immersion: Immerse the pretreated substrate in the above solution for 1 hour. During the immersion process, a weak electric field (10 V / cm) is applied to promote the uniform distribution of the antibacterial components.

[0058] Coating: taking out the dipped substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating;

[0059] Drying: Dry with infrared heating at 60℃ for 2 hours;

[0060] Coating: Finally, apply a layer of nanosilver particles.

[0061] Polyacrylic acid (PAA)

[0062] Structure: Polyacrylic acid is a polymer containing carboxyl groups (-COOH).

[0063] pH sensitivity: In an acidic environment (pH < 6), the carboxyl groups are protonated (-COOH), making the polymer chains hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl groups are deprotonated (-COO⁻), making the polymer chains hydrophilic, causing the coating to swell and slowing drug release.

[0064] The pH sensitive polymer coating has a thickness of 0.1 mm and is prepared by the following prior art methods:

[0065] Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and the solution is then evenly coated on the impregnated paper to form a coating by drying.

[0066] Electrospinning: pH-sensitive polymers were made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0067] Layer-by-layer self-assembly method: pH-sensitive polymers are deposited layer by layer on the impregnated paper through layer-by-layer self-assembly technology to form a multi-layer coating.

[0068] The thickness of the nano silver particle layer of the present invention is 0.1 mm. The nano silver particles are dispersed in a suitable solvent and then evenly coated on the surface of the substrate by spin coating, dip coating or spray coating to form the nano silver particle layer.

[0069] The following is the performance test process for antibacterial impregnated paper:

[0070] Antibacterial performance: Antibacterial tests on Escherichia coli and Staphylococcus aureus were carried out according to ISO 20743 standard. The results showed that the antibacterial impregnated paper had an antibacterial rate of over 99% against both bacteria.

[0071] Durability: After the samples were stored at 37°C and 80% relative humidity for 30 days and then tested again for antibacterial properties, the inhibition rate remained above 95%.

[0072] The data table is as follows:

[0073]

[0074] illustrate:

[0075] Initial testing: Antimicrobial testing is performed immediately after sample preparation;

[0076] After 30 days of storage: The samples were stored at 37°C and 80% relative humidity for 30 days and then the antibacterial test was performed again.

[0077] Example 2

[0078] This is the second embodiment of the present invention, which provides the preparation of intelligent responsive antibacterial impregnated paper and pH responsiveness test thereof, as follows:

[0079] The antibacterial impregnated paper comprises:

[0080] A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid;

[0081] A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to changes in the environmental pH value;

[0082] Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0083] The components of the impregnation liquid include the following raw materials in weight percentage: 1.5% tea tree oil, 2.5% cinnamaldehyde, 0.5% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the impregnation liquid does not exceed 5%, 70% ethanol, 1% chitosan and the balance water.

[0084] The rate regulating coating is a pH sensitive polymer coating, which accelerates the release of antibacterial components when the pH value is lower than 6 and slows down the release of antibacterial components when the pH value is higher than 7.5.

[0085] The pH sensitive polymer coating is selected from polyacrylic acid and further comprises a photosensitizer accounting for 0.2% of the mass of the polyacrylic acid.

[0086] Here are the steps:

[0087] Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 minutes to improve porosity and uniformity;

[0088] Solution preparation: Dissolve tea tree oil, cinnamaldehyde, lemon essential oil, and chitosan in a mixed solvent of ethanol and water and stir evenly;

[0089] Immersion: Immerse the pretreated substrate in the above solution for 1 hour. During the immersion process, a weak electric field (10 V / cm) is applied to promote the uniform distribution of the antibacterial components.

[0090] Coating: taking out the dipped substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating;

[0091] Drying: Dry with infrared heating at 60℃ for 2 hours;

[0092] Coating: Finally, apply a layer of nanosilver particles.

[0093] Polyacrylic acid is a polymer containing carboxyl groups (-COOH).

[0094] pH sensitivity: In an acidic environment (pH < 6), the carboxyl groups are protonated (-COOH), making the polymer chains hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl groups are deprotonated (-COO⁻), making the polymer chains hydrophilic, causing the coating to swell and slowing drug release.

[0095] The pH sensitive polymer coating has a thickness of 0.08 mm and is prepared by the following prior art methods:

[0096] Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and the solution is then evenly coated on the impregnated paper to form a coating by drying.

[0097] Electrospinning: pH-sensitive polymers were made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0098] Layer-by-layer self-assembly method: pH-sensitive polymers are deposited layer by layer on the impregnated paper through layer-by-layer self-assembly technology to form a multi-layer coating.

[0099] The thickness of the nano silver particle layer of the present invention is 0.1 mm. The nano silver particles are dispersed in a suitable solvent and then evenly coated on the surface of the substrate by spin coating, dip coating or spray coating to form the nano silver particle layer.

[0100] Performance testing:

[0101] pH responsiveness: The samples were placed in buffer solutions with pH values ​​of 4.0, 6.0, and 8.0, and the release rate of the antibacterial components was monitored. The results showed that when the pH value was lower than 6, the release rate of the antibacterial components was significantly accelerated;

[0102] When the pH value is higher than 7.5, the release rate slows down significantly;

[0103] The pH responsiveness test data table is as follows:

[0104]

[0105] illustrate:

[0106] Release rate: The rate at which the antibacterial components are released from the impregnated paper at different pH values. A larger value indicates a faster release rate.

[0107] Example 3

[0108] This is the third embodiment of the present invention, which provides the application and comprehensive performance evaluation of antibacterial impregnated paper, as follows:

[0109] Materials and methods

[0110] The antibacterial impregnated paper comprises:

[0111] A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid;

[0112] A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to changes in the environmental pH value;

[0113] Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0114] The components of the impregnation liquid include the following raw materials in weight percentage: 2% tea tree oil, 1.0% cinnamaldehyde, and 1% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the impregnation liquid does not exceed 5%, 80% ethanol, 1% chitosan and the balance water.

[0115] The rate regulating coating is a pH sensitive polymer coating, which accelerates the release of antibacterial components when the pH value is lower than 6 and slows down the release of antibacterial components when the pH value is higher than 7.5.

[0116] The pH sensitive polymer coating is selected from polyacrylic acid and further comprises a photosensitizer accounting for 0.3% of the mass of the polyacrylic acid.

[0117] Here are the steps:

[0118] Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 minutes to improve porosity and uniformity;

[0119] Solution preparation: Dissolve tea tree oil, cinnamaldehyde, lemon essential oil, and chitosan in a mixed solvent of ethanol and water and stir evenly;

[0120] Immersion: Immerse the pretreated substrate in the above solution for 1 hour. During the immersion process, a weak electric field (10 V / cm) is applied to promote the uniform distribution of the antibacterial components.

[0121] Coating: taking out the dipped substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating;

[0122] Drying: Dry with infrared heating at 60℃ for 2 hours;

[0123] Coating: Finally, apply the nano silver particle layer;

[0124] Marking area: The final product is equipped with thermochromic material and a UV-sensing label to indicate the current antibacterial efficacy status. The marking area is made of thermochromic material, which changes color when the temperature exceeds 30°C, and also includes a UV-sensing label that changes color when exposed to ultraviolet light.

[0125] Polyacrylic acid is a polymer containing carboxyl groups (-COOH). It is pH-sensitive: In acidic environments (pH < 6), the carboxyl groups protonate (-COOH), making the polymer chains hydrophobic, causing the coating to shrink and accelerating drug release. In alkaline environments (pH > 7.5), the carboxyl groups deprotonate (-COO⁻), making the polymer chains hydrophilic, causing the coating to swell and slowing drug release.

[0126] The pH sensitive polymer coating has a thickness of 0.06 mm and is prepared by the following prior art methods:

[0127] Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and the solution is then evenly coated on the impregnated paper to form a coating by drying.

[0128] Electrospinning: pH-sensitive polymers were made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0129] Layer-by-layer self-assembly method: pH-sensitive polymers are deposited layer by layer on the impregnated paper through layer-by-layer self-assembly technology to form a multi-layer coating.

[0130] The thickness of the nano silver particle layer of the present invention is 0.1 mm. The nano silver particles are dispersed in a suitable solvent and then evenly coated on the surface of the substrate by spin coating, dip coating or spray coating to form the nano silver particle layer.

[0131] Performance testing:

[0132] Mechanical strength: Tensile strength tests were conducted according to GB / T453-2002 standard. The results showed that the tensile strength of the substrate increased by about 20% after adding chitosan.

[0133] User experience: Samples were used on food packaging and air purifier filters. User feedback showed that thermochromic materials and UV-sensing labels provided intuitive status indications, enhancing user trust and satisfaction.

[0134] Comprehensive antibacterial performance: Long-term antibacterial performance tests were conducted in a variety of application scenarios. The results showed that the antibacterial impregnated paper exhibited excellent antibacterial effects under different environmental conditions.

[0135]

[0136]

[0137]

[0138] illustrate:

[0139] User experience index: data obtained through user questionnaires, where 1 is the lowest and 5 is the highest;

[0140] Accuracy of thermochromic materials: User evaluation of the accuracy of color changes of thermochromic materials;

[0141] UV sensor label accuracy: user evaluation of the accuracy of UV sensor label color change;

[0142] Overall satisfaction: The user's overall satisfaction with the product.

[0143] Example 4

[0144] This is the fourth embodiment of the present invention, which provides the preparation and clinical application of a medical antibacterial dressing, as follows:

[0145] The antibacterial impregnated paper comprises:

[0146] A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid;

[0147] A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to changes in the environmental pH value;

[0148] Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0149] The components of the impregnation liquid include the following raw materials in weight percentage: 1.8% tea tree oil, 1.2% cinnamaldehyde, 0.4% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the impregnation liquid does not exceed 5%, 70% ethanol, 1% chitosan and the balance water.

[0150] The rate regulating coating is a pH sensitive polymer coating, which accelerates the release of antibacterial components when the pH value is lower than 6 and slows down the release of antibacterial components when the pH value is higher than 7.5.

[0151] The pH sensitive polymer coating is selected from polyacrylic acid and further comprises a photosensitizer accounting for 0.3% of the mass of the polyacrylic acid.

[0152] Here are the steps:

[0153] Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 minutes to improve porosity and uniformity;

[0154] Solution preparation: Dissolve tea tree oil, cinnamaldehyde, lemon essential oil, and chitosan in a mixed solvent of ethanol and water and stir evenly;

[0155] Immersion: Immerse the pretreated substrate in the above solution for 1 hour. During the immersion process, a weak electric field (10 V / cm) is applied to promote the uniform distribution of the antibacterial components.

[0156] Coating: taking out the dipped substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating;

[0157] Drying: Dry with infrared heating at 60℃ for 2 hours;

[0158] Coating: Finally, apply the nano silver particle layer;

[0159] Medical packaging: The dried antibacterial dressing is sterile packaged and sterilized by radiation;

[0160] Polyacrylic acid is a polymer containing carboxyl groups (-COOH). It is pH-sensitive: In acidic environments (pH < 6), the carboxyl groups protonate (-COOH), making the polymer chains hydrophobic, causing the coating to shrink and accelerating drug release. In alkaline environments (pH > 7.5), the carboxyl groups deprotonate (-COO⁻), making the polymer chains hydrophilic, causing the coating to swell and slowing drug release.

[0161] The pH sensitive polymer coating has a thickness of 0.06 mm and is prepared by the following prior art methods:

[0162] Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and the solution is then evenly coated on the impregnated paper to form a coating by drying.

[0163] Electrospinning: pH-sensitive polymers were made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0164] Layer-by-layer self-assembly method: pH-sensitive polymers are deposited layer by layer on the impregnated paper through layer-by-layer self-assembly technology to form a multi-layer coating.

[0165] The thickness of the nano silver particle layer of the present invention is 0.1 mm. The nano silver particles are dispersed in a suitable solvent and then evenly coated on the surface of the substrate by spin coating, dip coating or spray coating to form the nano silver particle layer.

[0166] Performance Testing:

[0167] Biocompatibility testing: Cytotoxicity, skin irritation, and sensitization tests were conducted in accordance with ISO 10993. The results showed that the antibacterial dressing is mild to the skin and has no significant cytotoxicity or irritation.

[0168] Antibacterial performance: Antibacterial tests on methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa showed an inhibition rate of over 99%;

[0169] Clinical application: Patients with mild to moderate wounds in the hospital were selected as subjects and treated with the antibacterial dressing and compared with conventional gauze. After two weeks of observation, the wounds using the antibacterial dressing healed significantly faster than the control group, and the infection rate was significantly reduced;

[0170]

[0171] In summary, through the above four embodiments, it can be clearly seen that the multifunctional antibacterial impregnated paper of the present invention not only has long-lasting and efficient antibacterial properties, but also can intelligently adjust the release rate of antibacterial ingredients according to environmental changes, and exhibits good mechanical strength and user experience in practical applications. The results fully prove that the present invention has obvious creativity and good beneficial effects compared with the prior art.

[0172] At the same time, the present invention adds a nanosilver particle layer to the substrate, which enhances the long-term antibacterial effect of the antibacterial impregnated paper, and can maintain efficient antibacterial properties even after long-term use. The introduction of the pH-sensitive polymer coating allows the release rate of the antibacterial components to be automatically adjusted according to changes in the environmental pH value, so that the most suitable antibacterial protection can be provided in different environments, thereby improving the adaptability and effectiveness of the product. The addition of chitosan to the substrate not only improves the mechanical strength of the cellulose paper, but also enhances its own antibacterial properties. Chitosan, as a natural polysaccharide, has good biocompatibility and antibacterial effects, which helps to build a more solid and hygienic material foundation.

[0173] It is important to note that the construction and arrangement of the present application, as illustrated in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. All such modifications are therefore intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or resequenced according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the recited function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, the invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0174] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (i.e., those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention).

[0175] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0176] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An antibacterial impregnated paper, characterized in that: The antibacterial impregnated paper comprises: A substrate, a melamine-impregnated paper substrate impregnated with an impregnation liquid; A rate regulating coating applied to the surface of the substrate so that the release rate of the antibacterial component is adjusted according to the change of the environmental pH value; The surface of the rate regulating coating is also coated with a nano silver particle layer. The ingredients of the impregnation liquid include the following raw materials in weight percentage: 0.5-2% tea tree oil, 1-3% cinnamaldehyde, 0.5-1% lemon essential oil, and the total concentration of the tea tree oil, cinnamaldehyde and lemon essential oil in the impregnation liquid does not exceed 5%, 70-80% ethanol and water, and the impregnation liquid also includes 1% chitosan, The rate regulating coating is a pH sensitive polymer coating, which accelerates the release of antibacterial components when the pH value is lower than 6 and slows down the release of antibacterial components when the pH value is higher than 7.

5. The pH sensitive polymer coating is polyacrylic acid.

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