Bacteriostatic impregnated paper and preparation method thereof

Abstract

The invention relates to the technical field of preparation of bacteriostatic impregnated paper, and discloses bacteriostatic impregnated paper and a preparation method thereof. The bacteriostatic impregnated paper comprises a melamine impregnated paper base material impregnated with impregnation liquid; the rate adjusting coating is coated on the surface of the base material, so that the release rate of the antibacterial component is adjusted according to the change of the pH value of the environment; wherein the surface of the rate adjusting coating is further coated with a nano-silver particle layer, and the impregnation liquid is prepared from, by weight, 0.5%-2% of tea tree oil, 1%-3% of cinnamyl aldehyde, 0.5%-1% of lemon essential oil, 70%-80% of ethyl alcohol and water. The long-term antibacterial effect is enhanced due to the existence of the nano-silver particle layer, the efficient antibacterial performance can be kept even after long-time use, and the release rate of the antibacterial component can be automatically adjusted according to the change of the environmental pH value due to the introduction of the pH sensitive polymer coating.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial impregnated paper preparation, in particular to an 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 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, and limiting its wide application in a variety of application scenarios, thereby reducing its overall antibacterial performance. Summary of the invention

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

[0004] To achieve the above object, the present invention provides the following technical solutions: On the one hand, an antibacterial impregnated paper is provided, the antibacterial impregnated paper comprising: 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0005] The components 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.

[0006] As a further solution of the present invention: the impregnation solution also includes 1% chitosan.

[0007] As a further solution of the present invention: 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.

[0008] As a further solution of the present invention: the pH sensitive polymer coating is selected from one or more of polyacrylic acid, polymethacrylate or copolymers thereof, and further comprises 0.1-0.3% of a photosensitizer to increase the responsiveness to ultraviolet rays.

[0009] Another aspect of the present invention provides a preparation method comprising: Prepare and pretreat the substrate; Use the impregnation method to allow the solution to fully penetrate into the substrate; Coating a rate regulating coating and a nano silver particle layer on the surface of a substrate; After drying, the antibacterial impregnated paper product is obtained.

[0010] As a further embodiment of the present invention, the pretreatment includes degreasing, bleaching and drying the substrate, and also includes using ultrasonic treatment to improve the porosity and uniformity of the substrate.

[0011] Furthermore, use an ultrasonic cleaning machine with a frequency setting of 2-40 kHz. The power setting is 50-200W, and the processing time is set to 0.5-1 hour; Steps: Place the dried substrate into the water tank of an ultrasonic cleaner; Add appropriate amount of deionized water or special cleaning solution; Set the ultrasonic frequency and power; Start the ultrasonic cleaning machine and process for 0.5-1 hour; After the treatment is completed, remove the substrate and rinse it with clean water; Allow the substrate to dry naturally under ventilation conditions or use an oven to dry at low temperature; Ultrasonic treatment produces a cavitation effect through high-frequency vibration, which can effectively remove tiny bubbles inside the substrate, increase the porosity, and make the substrate structure more uniform. The treatment can also break the surface tension of the substrate and promote the penetration of subsequent solutions.

[0012] As a further solution of the present invention: the immersion time is 0.5-2 hours, and a weak electric field is applied during the immersion process to promote uniform distribution of the antibacterial components.

[0013] Furthermore, an electric field generator is used, the electric field strength is set to 10-50 V / cm, and the electrode arrangement requires a pair of parallel electrodes to be set in the immersion tank to ensure that the electric field is evenly distributed. The specific steps are as follows: Pour the prepared antibacterial solution into the immersion tank Place the pretreated substrate into a dipping tank; Connect the electric field generator and set the appropriate electric field strength; The electric field generator is started to apply a weak electric field while performing the immersion treatment; The immersion time is 0.5-2 hours, and the specific time is adjusted according to the experimental results; When the dipping is complete, remove the substrate and gently squeeze out any excess liquid; Place the substrate in the drying equipment and dry it at 60-80°C for 1-3 hours. Infrared heating can be used to improve drying efficiency and quality. The use of a weak electric field can make the charged antibacterial molecules more evenly distributed in the substrate through electrophoresis, thereby improving the impregnation effect.

[0014] As a further solution of the present invention: the finished product is obtained after the drying, wherein the drying temperature is 60-80° C., the drying time is 1-3 hours, and infrared heating is used during the drying process to improve the drying efficiency and quality.

[0015] As a further solution of the present invention: the method further includes setting an identification area on the final product to indicate the current antibacterial effectiveness status, the identification area is made of thermochromic material, the color changes when the temperature exceeds 30°C, and also includes a UV sensing label that displays different colors when exposed to ultraviolet rays.

[0016] Another aspect of the present invention provides an application of an antibacterial impregnated paper, which is used on the surface of furniture, and is particularly suitable for surfaces of objects with strict antibacterial requirements.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides an antibacterial impregnated paper and a preparation method and application thereof, 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-efficiency antibacterial performance even after long-term use. The introduction of the pH-sensitive polymer coating enables the release rate of the antibacterial components to be automatically adjusted according to changes in the environmental pH value. DETAILED DESCRIPTION

[0018] 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.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and 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.

[0020] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0021] This is the first embodiment of the present invention, which provides the preparation of multifunctional antibacterial impregnated paper and the test of its antibacterial performance, as follows: 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0022] The ingredients 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.

[0023] 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.

[0024] 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.

[0025] Here are the steps: Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 min to improve porosity and uniformity; Solution preparation: dissolve tea tree oil, cinnamaldehyde, lemon essential oil and chitosan in a mixed solvent of ethanol and water and stir evenly; Immersion: Immerse the pretreated substrate in the above solution for 1 hour, and apply a weak electric field (10 V / cm) during the immersion process to promote the uniform distribution of the antibacterial components; Coating: taking out the immersed substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating; Drying: Dry with infrared heating at 60°C for 2 hours; Coating: Finally, a layer of nanosilver particles is applied.

[0026] Polyacrylic acid (PAA) Structure: Polyacrylic acid is a polymer containing carboxyl groups (-COOH).

[0027] pH sensitivity: In an acidic environment (pH < 6), the carboxyl group is protonated (-COOH), and the polymer chain becomes hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl group is deprotonated (-COO⁻), and the polymer chain becomes hydrophilic, causing the coating to swell and slowing drug release.

[0028] The pH sensitive polymer coating has a thickness of 0.1 mm and the preparation method includes the following prior art methods: Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and then the solution is evenly coated on the impregnated paper to form a coating by drying.

[0029] Electrospinning: The pH-sensitive polymer was made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0030] 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.

[0031] 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.

[0032] The following is the performance test process for antibacterial impregnated paper: Antibacterial performance: The antibacterial test on Escherichia coli and Staphylococcus aureus was carried out according to ISO 20743 standard. The results showed that the antibacterial rate of the antibacterial impregnated paper against both bacteria exceeded 99%; Durability: After the samples were stored at 37°C and 80% relative humidity for 30 days, the antibacterial test was conducted again, and the antibacterial rate remained above 95%; The data table is as follows:

[0033] illustrate: Initial testing: Antimicrobial testing is performed immediately after sample preparation; After 30 days of storage: The samples were stored at 37°C and 80% relative humidity for 30 days and then tested again for antibacterial properties.

[0034] Example 2

[0035] 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: 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0036] The ingredients 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.

[0037] 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.

[0038] 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.

[0039] Here are the steps: Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 min to improve porosity and uniformity; Solution preparation: dissolve tea tree oil, cinnamaldehyde, lemon essential oil and chitosan in a mixed solvent of ethanol and water and stir evenly; Immersion: Immerse the pretreated substrate in the above solution for 1 hour, and apply a weak electric field (10 V / cm) during the immersion process to promote the uniform distribution of the antibacterial components; Coating: taking out the immersed substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating; Drying: Dry with infrared heating at 60°C for 2 hours; Coating: Finally, a layer of nanosilver particles is applied.

[0040] Polyacrylic acid is a polymer containing carboxyl groups (-COOH).

[0041] pH sensitivity: In an acidic environment (pH < 6), the carboxyl group is protonated (-COOH), and the polymer chain becomes hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl group is deprotonated (-COO⁻), and the polymer chain becomes hydrophilic, causing the coating to swell and slowing drug release.

[0042] The pH sensitive polymer coating has a thickness of 0.08 mm and the preparation method includes the following prior art methods: Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and then the solution is evenly coated on the impregnated paper to form a coating by drying.

[0043] Electrospinning: The pH-sensitive polymer was made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0044] 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.

[0045] 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.

[0046] Performance Test: 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; When the pH value was higher than 7.5, the release rate slowed down significantly; The pH responsiveness test data table is as follows:

[0047] illustrate: Release rate: The speed at which antibacterial ingredients are released from impregnated paper at different pH values. The larger the value, the faster the release rate.

[0048] Example 3

[0049] This is the third embodiment of the present invention, which provides the application and comprehensive performance evaluation of antibacterial impregnated paper, as follows: Materials and Methods 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0050] The ingredients of the impregnation liquid include the following raw materials in weight percentage: 2% tea tree oil, 1.0% cinnamaldehyde, 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.

[0051] 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.

[0052] 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.

[0053] Here are the steps: Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 min to improve porosity and uniformity; Solution preparation: dissolve tea tree oil, cinnamaldehyde, lemon essential oil and chitosan in a mixed solvent of ethanol and water and stir evenly; Immersion: Immerse the pretreated substrate in the above solution for 1 hour, and apply a weak electric field (10 V / cm) during the immersion process to promote the uniform distribution of the antibacterial components; Coating: taking out the immersed substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating; Drying: Dry with infrared heating at 60°C for 2 hours; Coating: Finally, a layer of nano silver particles is coated; Marking area setting: Thermochromic materials and UV sensing labels are set on the final product. To indicate the current antibacterial efficacy status, the marking area is made of thermochromic materials, which change color when the temperature exceeds 30°C, and also includes a UV sensing label that displays different colors when exposed to ultraviolet rays.

[0054] Polyacrylic acid is a polymer containing carboxyl groups (-COOH). pH sensitivity: In an acidic environment (pH < 6), the carboxyl groups are protonated (-COOH), and the polymer chains become hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl groups are deprotonated (-COO⁻), and the polymer chains become hydrophilic, causing the coating to swell and slowing drug release.

[0055] The pH sensitive polymer coating has a thickness of 0.06 mm and the preparation method includes the following prior art methods: Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and then the solution is evenly coated on the impregnated paper to form a coating by drying.

[0056] Electrospinning: The pH-sensitive polymer was made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0057] 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.

[0058] 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.

[0059] Performance Test: Mechanical strength: The tensile strength test was carried out according to GB / T453-2002 standard. The results showed that the tensile strength of the substrate increased by about 20% after adding chitosan. User experience: Samples were used for 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. 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.

[0060]

[0061]

[0062] illustrate: User experience index: data obtained through user questionnaire survey, where 1 is the lowest and 5 is the highest; Accuracy of thermochromic materials: User evaluation of the accuracy of color change of thermochromic materials; UV sensing label accuracy: User evaluation of the accuracy of color change of UV sensing labels; Overall satisfaction: The user's overall satisfaction with the product.

[0063] Example 4

[0064] This is the fourth embodiment of the present invention, which provides the preparation and clinical application of medical antibacterial dressings, as follows: 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

[0065] The ingredients 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.

[0066] 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.

[0067] 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.

[0068] Here are the steps: Pretreatment: The cellulose paper was degreased, bleached, and dried, and then treated with ultrasound for 30 min to improve porosity and uniformity; Solution preparation: dissolve tea tree oil, cinnamaldehyde, lemon essential oil and chitosan in a mixed solvent of ethanol and water and stir evenly; Immersion: Immerse the pretreated substrate in the above solution for 1 hour, and apply a weak electric field (10 V / cm) during the immersion process to promote the uniform distribution of the antibacterial components; Coating: taking out the immersed substrate, coating it with a pH-sensitive polymer coating, and adding a photosensitizer to the coating; Drying: Dry with infrared heating at 60°C for 2 hours; Coating: Finally, a layer of nano silver particles is coated; Medical packaging: The dried antibacterial dressing is sterile packaged and sterilized by radiation; Polyacrylic acid is a polymer containing carboxyl groups (-COOH). pH sensitivity: In an acidic environment (pH < 6), the carboxyl groups are protonated (-COOH), and the polymer chains become hydrophobic, causing the coating to shrink and accelerating drug release. In an alkaline environment (pH > 7.5), the carboxyl groups are deprotonated (-COO⁻), and the polymer chains become hydrophilic, causing the coating to swell and slowing drug release.

[0069] The pH sensitive polymer coating has a thickness of 0.06 mm and the preparation method includes the following prior art methods: Solution coating method: The pH-sensitive polymer is dissolved in an appropriate solvent, and then the solution is evenly coated on the impregnated paper to form a coating by drying.

[0070] Electrospinning: The pH-sensitive polymer was made into nanofibers by electrospinning technology, and then the nanofibers were deposited on the impregnated paper.

[0071] 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.

[0072] 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.

[0073] Performance Testing: Biocompatibility test: Cytotoxicity, skin irritation and sensitization tests were carried out in accordance with ISO 10993 standards. The results showed that the antibacterial dressing is mild to the skin and has no obvious cytotoxicity and irritation. Antibacterial performance: Antibacterial tests on methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa showed an inhibition rate of over 99%; Clinical application: Patients with mild to moderate wounds in the hospital were selected as subjects, and the antibacterial dressing was used for treatment 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;

[0074] 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.

[0075] At the same time, the present invention adds a nano silver particle layer to the substrate, which enhances the long-term antibacterial effect of the antibacterial impregnated paper, and can maintain efficient antibacterial performance even after long-term use. The introduction of the pH-sensitive polymer coating allows the release rate of the antibacterial component to be automatically adjusted according to the change of 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 performance. As a natural polysaccharide, chitosan has good biocompatibility and antibacterial effect, which helps to build a more solid and hygienic material foundation.

[0076] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. 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 the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0077] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0078] It will be appreciated that in the development of any actual implementation, 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 be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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; Wherein, the surface of the rate regulating coating is also coated with a nano silver particle layer.

2. 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.

3. The antibacterial impregnated paper according to claim 1, characterized in that: The impregnation solution also includes 1% chitosan.

4. The antibacterial impregnated paper according to claim 1, characterized in that: 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.

5. The antibacterial impregnated paper according to claim 3, characterized in that: The pH sensitive polymer coating is selected from one or more of polyacrylic acid, polymethacrylate or copolymers thereof.

6. A method for preparing the antibacterial impregnated paper according to any one of claims 1 to 4, characterized in that: The preparation steps include: Prepare and pretreat the substrate; Use the impregnation method to allow the solution to fully penetrate into the substrate; sequentially coating a rate regulating coating and a nano silver particle layer on the surface of the substrate; After drying, the antibacterial impregnated paper product is obtained.

7. The method for preparing an antibacterial impregnated paper according to claim 6, characterized in that: The pretreatment includes degreasing, bleaching and drying the substrate, and also includes using ultrasonic treatment to improve the porosity and uniformity of the substrate.

8. The method for preparing an antibacterial impregnated paper according to claim 6, characterized in that: The immersion time is 0.5-2 hours, and a weak electric field is applied during the immersion process to promote uniform distribution of the antibacterial components.

9. The method for preparing an antibacterial impregnated paper according to claim 6, characterized in that: The finished product is obtained after drying, wherein the drying temperature is 60-80° C., the drying time is 1-3 hours, and infrared heating is used during the drying process.

10. The method for preparing an antibacterial impregnated paper according to claim 6, characterized in that: The method further includes setting an identification area on the final product to indicate the current antibacterial efficacy status, wherein the identification area is made of a thermochromic material, and the color changes when the temperature exceeds 30°C, and also includes a UV sensing label that displays different colors when exposed to ultraviolet rays.

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