Hygiene product and preparation method thereof

Abstract

The present invention provides a sanitary product characterized by comprising an energy absorption layer and a cooling layer, and the preparation method is as follows: (1) preparing the surface layer, core layer, bottom layer and other conventional components of the sanitary product according to the existing technology; (2) adding the energy absorption layer and the cooling layer between the core layer and the bottom layer of the sanitary product, wherein the energy absorption layer is wrapped with a semipermeable membrane, and its main components are phase change material and small molecule antibacterial material; the cooling layer is mainly composed of component A and component B, and relies on the reaction between them to perform cooling; (3) assembling the surface layer, core layer, energy absorption layer, bottom layer and other conventional components of the sanitary product according to the existing technology into a sanitary product. The method is simple in process, can be implemented in various ways, is low in cost, and is suitable for industrial application. The prepared sanitary product not only maintains excellent heat storage and temperature regulation functions, but also has good antibacterial ability, is safe and comfortable to use, and has broad market prospects.

Description

Technical Field

[0001] The present invention relates to the field of sanitary products, and in particular to a sanitary product with temperature regulating and antibacterial functions and a preparation method thereof. Background Art

[0002] With the advancement of society and the increasing needs of people, the field of sanitary products has developed rapidly. People's demand for sanitary products has gradually increased, and the scope and requirements of demand have become increasingly higher. Traditional sanitary products have many shortcomings due to their relatively simple functions. To meet people's growing material needs, the field of sanitary products is gradually shifting towards functionalization, personalization, and intelligence.

[0003] During the use of sanitary products, a small microclimate will be formed between human skin and sanitary products. Since sanitary products need to frequently contact with human skin and cover the skin for a long time, high requirements are placed on sanitary products and the local small microclimate. Currently, during the use of sanitary products, problems such as bacterial infection, skin rashes, and overhydration of the skin often occur. This is because sanitary products cover the skin for a long time, the local microclimate is relatively humid, the temperature is correspondingly high, and the hydration level is high, creating a favorable environment for the survival and reproduction of bacteria and fungi. However, most current sanitary products do not have both temperature regulation and antibacterial capabilities. Therefore, giving traditional sanitary products temperature regulation and antibacterial functions has very important application value.

[0004] Phase change materials (PCMs) are materials that absorb or release large amounts of energy in the form of latent heat (ΔH) between solid-solid or solid-liquid phases without experiencing a significant change in their own temperature. The absorption or release of latent heat during phase change is typically brief. Among the various thermal storage technologies currently under consideration, PCMs are particularly attractive because, compared to other energy storage materials, they possess high-density heat storage and release capabilities, enabling near-isothermal storage and release processes, forming a comprehensive energy storage system. To minimize PCM's reactivity with the external environment, reduce its volatilization and diffusion rates, and make it easier to handle, researchers have developed several methods for encapsulating and storing PCMs. Among these methods, microencapsulation of PCMs has broad applicability. The encapsulated PCMs are stable and leak-resistant, making them suitable for a wide range of applications.

[0005] In recent years, numerous patents have been filed regarding improving the antimicrobial properties of sanitary products. Japanese patent JP2000119960 uses a fabric padding process to add nanosilver ions and silver oxide antimicrobial agents between or on top of fabric fibers, imparting a certain degree of antimicrobial activity to the fabric. However, the nanosilver ions and silver oxide antimicrobial agents are merely attached to the surface of the textile and do not form chemical bonds, making the bond relatively unstable. Furthermore, nanosilver ions are toxic and pose a health risk during use. Chinese patent 201410265665.5 discloses a method for introducing probiotics into sanitary napkins through a specific production process. This method leverages the inherent properties and advantages of probiotics to achieve antimicrobial effects, but the antimicrobial spectrum of probiotics is relatively narrow and their antimicrobial activity is relatively poor. However, relatively few reports exist on temperature-regulating sanitary products. The survival and growth of bacteria and fungi are also closely related to temperature. Properly regulating the temperature of the microenvironment not only helps maintain human comfort but also inhibits bacterial proliferation. Chinese patent CN201320827225.5 discloses a moisture-absorbing article that incorporates a phase-change temperature-regulating component by spraying, coating, or coating the article, thereby imparting a certain degree of temperature-regulating capability. However, adding the phase-change material in this manner can significantly affect the breathability and moisture absorption capacity of the article, and the phase-change material is prone to loss, leading to other negative effects.

[0006] The above methods are only used to prepare sanitary products with a single antibacterial or temperature regulating function, and no reports have been made on sanitary products with both antibacterial and temperature regulating functions and their preparation methods. Summary of the Invention

[0007] To address the aforementioned issues and address the shortcomings of the prior art, the present invention provides a sanitary product and a method for preparing the same. This method is simple and can be implemented in a variety of ways. The product exhibits excellent antibacterial and stable temperature-regulating properties, a simple and cost-effective preparation process, and is suitable for industrial applications. The sanitary product produced by this method maintains excellent heat storage and temperature-regulating properties while also exhibiting excellent antibacterial and antimicrobial properties. It is safe and comfortable to use, has a broad market, and possesses significant application value.

[0008] The present invention provides a sanitary product, which is characterized by comprising an energy absorption layer and a cooling layer, and the preparation method is as follows:

[0009] (1) Prepare the surface layer, core layer, bottom layer and other conventional components of the sanitary product according to the existing technology.

[0010] (2) Add an energy absorption layer to sanitary products. This layer is wrapped with a semi-permeable membrane. Its main components are phase change materials and small molecule antibacterial materials. Through the phase transition of the phase change material in the energy absorption layer, energy is absorbed and the temperature of the microenvironment is reduced, thereby making the human body feel comfortable.

[0011] (3) The preparation method of the energy absorption layer is as follows: antibacterial substances are sprayed on the outer surface of the semipermeable membrane, and phase change materials, small molecule antibacterial materials, and nucleating agents are sealed inside, wherein the mass fraction of the phase change material is 25% to 90%, the mass fraction of the small molecule antibacterial material is 0.01% to 70%, and the mass fraction of the nucleating agent is 0.1% to 5%.

[0012] (4) Adding a cooling layer to sanitary products. This layer is mainly composed of component A and component B. The preparation method is as follows: component A and component B are respectively encapsulated with a low-strength plastic film, and then the encapsulated components A and component B are placed in a high-strength plastic film for secondary encapsulation. Before using the sanitary products, rub the sanitary products with your hands. At this time, the low-strength plastic film encapsulating components A and component B will break, while the high-strength plastic film on the outside will remain sealed intact. At this time, components A and component B meet and react chemically, absorbing a large amount of heat, thereby reducing the temperature.

[0013] (4) The energy absorption layer and the cooling layer are placed between the core layer and the bottom layer, and the cooling layer is below the energy absorption layer. This will not affect the absorption performance of the sanitary product.

[0014] (5) Assemble the surface layer, core layer, energy absorption layer, bottom layer and other conventional components of the sanitary product according to the existing technology to form the sanitary product.

[0015] The energy absorption layer includes a semipermeable membrane, an antibacterial material for spraying, a phase change material, a small molecule antibacterial material, and a nucleating agent, wherein the phase change material is any one of inorganic salt hydrates, acrylic acid, mint, paraffin hydrocarbons, polyethylene glycols, fatty acids and fatty acid derivatives, polyols and polyol derivatives, or a mixture of any of them in any ratio; the antibacterial material used for spraying is quaternary ammonium salts, chitosan, cyclodextrin, turmeric root alcohol, ethyl vanillin, acylanilide, cypriol, imidazole , sorbic acid, vanillin, thiazoles, isothiazolone derivatives, bisguanidines, or a mixture of any of them in any ratio; the nucleating agent is talc, calcium carbonate, silicon dioxide, alum, titanium dioxide, calcium oxide, magnesium oxide, carbon black, mica, fatty carboxylic acid metal compounds, benzyl sorbitol derivatives, aromatic carboxylic acid metal compounds, organic phosphates and lignin and its derivatives, sodium benzoate, bis(p-tert-butylbenzoic acid)carboxyl aluminum, polybutylene terephthalate, poly-3-methylbutene-1, and polyvinyl cyclosilane, or a mixture of any of them in any ratio.

[0016] The semipermeable membrane is any one of cellulose acetate membrane, polyamide membrane and polybenzimidazole membrane or a mixture of any of them in any ratio.

[0017] The small molecule antibacterial material is any one of zingiberenol, ethyl vanillin, acylanilides, hibiscus alcohol, imidazoles, sorbic acid, vanillin, thiazoles, isothiazolone derivatives, and bisguanidines, or a mixture of any of them in any ratio.

[0018] The small molecule antibacterial material can penetrate the semipermeable membrane into other parts of the sanitary product, thereby playing an antibacterial role.

[0019] The mass fraction of the phase change material in the energy absorption layer is 25% to 90%, the mass fraction of the small molecule antibacterial material is 0.01% to 70%, and the mass fraction of the nucleating agent is 0.1% to 5%.

[0020] Component A of the refrigeration layer is any one of sodium sulfate decahydrate, sodium carbonate heptahydrate, urea, and ammonium chloride, or a mixture of any of them in any ratio.

[0021] Component B of the refrigeration layer is any one of ammonium nitrate, sodium nitrate, acid ammonium sulfate, acid sodium sulfate, disodium phosphate dodecahydrate, sodium thiosulfate pentahydrate, or a mixture of any of them in any ratio.

[0022] The mass fraction of component A in the refrigeration layer is 5% to 95%.

[0023] The refrigeration temperature range reached by the refrigeration layer is -15°C to 35°C.

[0024] Under the action of the cooling layer, the energy absorption layer undergoes a phase change and releases the energy stored therein, thereby being able to absorb and release heat repeatedly and reversibly, so that the local microclimate maintains a comfortable temperature for a long time.

[0025] The sanitary products include diapers, paper diapers, pull-up pants, sanitary napkins, pull-up pants, nursing pads, surgical gowns, and dressings. DETAILED DESCRIPTION

[0026] The method described in the present invention is further illustrated below by means of specific examples, but it is not intended that the present invention is limited to these examples.

[0027] Example

[0028] Example 1:

[0029] A method for preparing diapers comprises the following steps:

[0030] (1) Prepare the surface layer, guide layer, composite core layer, bottom layer, waistband and spring patch of the diaper according to the existing technology.

[0031] (2) An energy absorption layer is added between the composite core layer and the bottom layer of the diaper. The preparation method of the layer is as follows: the antibacterial substance chitosan is sprayed on the outer surface of the semipermeable membrane of cellulose acetate membrane, and the phase change material calcium chloride hexahydrate is sealed inside, with a phase change temperature of 29°C and a mass fraction of 65%; the small molecule antibacterial material is zingiberol, with a mass fraction of 30%; and the nucleating agent is silicon dioxide, with a mass fraction of 5%.

[0032] (3) A cooling layer is added between the energy absorption layer and the bottom layer of the diaper. The preparation method of the cooling layer is as follows: sodium sulfate decahydrate and ammonium nitrate are respectively encapsulated and laminated with low-density polyethylene at a mass fraction ratio of 4:1, and then the encapsulated and laminated sodium sulfate decahydrate and ammonium nitrate are placed together in a high-strength polyvinyl chloride plastic film for secondary packaging.

[0033] (4) Assemble and shape the surface layer, the guide layer, the composite core layer, the energy absorption layer, the cooling layer, the bottom layer, the waistline, and the spring patch of the diaper according to the existing technology.

[0034] The diapers prepared using this example have a phase transition temperature of 29°C and can maintain the microenvironment temperature between 28°C and 35°C for a long time.

[0035] Example 2:

[0036] A method for preparing a sanitary napkin comprises the following steps:

[0037] (1) The surface layer, the guide layer, the composite core layer and the bottom layer of the sanitary napkin are prepared according to the existing technology.

[0038] (2) An energy absorption layer is added between the composite core layer and the bottom layer of the sanitary napkin. The preparation method of the layer is as follows: the antibacterial substance quaternary ammonium salt is sprayed on the outer surface of the polyamide membrane semipermeable membrane, and the phase change material n-nonadecane is sealed inside, with a phase change temperature of 30°C and a mass fraction of 90%; the small molecule antibacterial material is thiazole, with a mass fraction of 9%; and the nucleating agent is sodium benzoate, with a mass fraction of 1%.

[0039] (3) A cooling layer is added between the energy absorption layer and the bottom layer of the sanitary napkin. The preparation method of the cooling layer is as follows: sodium sulfate decahydrate and sodium nitrate are respectively encapsulated and laminated with low-density polyethylene at a mass fraction ratio of 19:1, and then the encapsulated and laminated sodium sulfate decahydrate and sodium nitrate are placed together in a high-strength polyvinyl chloride plastic film for secondary packaging.

[0040] (4) The surface layer, the guide layer, the composite core layer, the energy absorption layer, the cooling layer and the bottom layer of the sanitary napkin are assembled and formed according to the existing technology.

[0041] Example 3:

[0042] A method for preparing a nursing pad comprises the following steps:

[0043] (1) Prepare the surface layer, guide layer, composite core layer and bottom layer of the nursing pad according to the existing technology.

[0044] (2) An energy absorption layer is added between the composite core layer and the bottom layer of the nursing pad. The preparation method of this layer is as follows: the antibacterial substance sorbic acid is sprayed on the outer surface of the polybenzimidazole membrane semipermeable membrane, and the phase change material polyacrylate octadecyl ester is sealed inside, with a phase change temperature of 32°C and a mass fraction of 35%; the small molecule antibacterial material is an isothiazolone derivative with a mass fraction of 64.9%; the nucleating agent is talcum powder with a mass fraction of 0.1%.

[0045] (3) A cooling layer is added between the energy absorption layer and the bottom layer of the nursing pad. The preparation method of the cooling layer is as follows: sodium carbonate heptahydrate and ammonium sulfate are respectively encapsulated and laminated with low-density polyethylene at a mass fraction ratio of 1:1, and then the encapsulated and laminated sodium carbonate heptahydrate and ammonium sulfate are placed together in a high-strength polyvinyl chloride plastic film for secondary packaging.

[0046] (4) The surface layer, the guide layer, the composite core layer, the energy absorption layer, the cooling layer and the bottom layer of the nursing pad are assembled and formed according to the existing technology.

[0047] This sanitary product preparation method is simple and can be implemented in a variety of ways. The product has stable antibacterial and temperature-regulating properties, is low-cost, and is suitable for industrial applications. The sanitary products produced by this preparation method not only maintain excellent heat storage and temperature-regulating functions but also possess excellent antibacterial and antimicrobial properties, making them safe to use and versatile.

[0048] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing sanitary products, characterized in that The following steps are involved: (1) preparing the surface layer, core layer and bottom layer of the sanitary product; (2) Adding an energy absorption layer to sanitary products, wherein the energy absorption layer is wrapped with a semipermeable membrane, and its main components are phase change material, small molecule antibacterial material, and nucleating agent. Through the phase transition of the phase change material of the energy absorption layer, energy is absorbed and the temperature of the microenvironment is reduced, thereby making the human body feel comfortable; the preparation method of the energy absorption layer is to spray antibacterial substance on the outer surface of the semipermeable membrane, and the inner part is sealed with a phase change material with a mass fraction of 25% to 90%, a small molecule antibacterial material with a mass fraction of 0.01% to 70%, and a nucleating agent with a mass fraction of 0.1% to 5%, wherein the phase change material is an inorganic salt hydrate, acrylic acid, mint, paraffin hydrocarbon, polyethylene glycol, fatty acid and fatty acid derivatives, polyol and polyol Any one of the derivatives or a mixture of any several in any ratio; the small molecule antibacterial material is any one of zingiberenol, ethyl vanillin, acylanilide, hibiscus alcohol, imidazoles, sorbic acid, vanillin, thiazoles, isothiazolone derivatives, and bisguanidines or a mixture of any several in any ratio; the nucleating agent is any one of talc, calcium carbonate, silicon dioxide, alum, titanium dioxide, calcium oxide, magnesium oxide, carbon black, mica, fatty carboxylic acid metal compounds, benzyl sorbitol derivatives, aromatic carboxylic acid metal compounds, organic phosphates and lignin and its derivatives, sodium benzoate, bis(p-tert-butylbenzoic acid)carboxyl aluminum, polybutylene terephthalate, poly-3-methylbutene-1, and polyvinyl cyclosilane or a mixture of any several in any ratio; (3) Adding a cooling layer to sanitary products, wherein the cooling layer is mainly composed of component A and component B, and the cooling temperature range reached by the cooling layer is -15°C to 35°C. The preparation method is: respectively encapsulating component A and component B with a low-strength plastic film, and then placing the encapsulated component A and component B into a high-strength plastic film for secondary encapsulation, wherein component A of the cooling layer is one of sodium sulfate decahydrate and sodium carbonate heptahydrate, with a mass fraction of 5% to 95%, and wherein component B of the cooling layer is one of ammonium nitrate, sodium nitrate, acid ammonium sulfate, and acid sodium sulfate; (4) The energy absorption layer and the cooling layer are placed between the core layer and the bottom layer, with the cooling layer being below the energy absorption layer. This will not affect the absorption performance of the sanitary product. (5) The surface layer, core layer, energy absorption layer, cooling layer and bottom layer of the sanitary product are assembled into a sanitary product. Under the action of the cooling layer, the energy absorption layer undergoes a phase change and releases the energy stored therein, thereby absorbing and releasing heat repeatedly and reversibly, so that the local microclimate of the sanitary product maintains a comfortable temperature for a long time.

2. The preparation method according to claim 1, wherein: The semipermeable membrane described in step (2) is any one of cellulose acetate membrane, polyamide membrane, polybenzimidazole membrane or a mixture of any several of them in any ratio, and the antibacterial material used for spraying is any one of quaternary ammonium salts, chitosan, cyclodextrin, zingiberenol, ethyl vanillin, acylanilides, hibiscus alcohol, imidazoles, sorbic acid, vanillin, thiazoles, isothiazolone derivatives, and bisguanidines or a mixture of any several of them in any ratio.