Self-heating antibacterial absorption article and manufacturing method thereof

Abstract

The invention relates to a self-heating antibacterial absorption article and a manufacturing method thereof. The self-heating type antibacterial absorption article sequentially comprises a surface layer, a flow guide layer, a self-heating type antibacterial absorption layer and a bottom layer from top to bottom. The self-heating antibacterial absorption layer sequentially comprises a wet-process super absorbent resin absorbent paper layer, an antibacterial traditional Chinese medicine composition layer, a first non-woven fabric layer, a self-heating functional super absorbent resin layer and a second non-woven fabric layer from top to bottom. The self-heating type antibacterial absorption article has excellent antibacterial performance, can remove peculiar smell and prevent the problem of allergy of a user in the using process, is good in fumigation effect, can enable the medicine effect of traditional Chinese medicine to be exerted to the maximum extent, has very good effects on leucorrhea, body cold, uterus cold, irregular menstruation and dysmenorrhea, and has the advantages of being simple in structure and convenient to use. The antibacterial absorption article has the advantages of being high in absorption speed, low in reverse osmosis, good in dryness and comfort, large in absorption amount and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary products, and in particular to a self-heating antibacterial absorbent article and a manufacturing method thereof. Background Art

[0002] The composition structure of existing sanitary absorbent articles is roughly divided into liquid permeable surface material, liquid diversion material, absorbent body, breathable and liquid impermeable bottom material, and other structures such as functional core, cover cloth, etc. are added according to specific requirements.

[0003] With the development of the times, consumers' requirements for sanitary absorbent articles are constantly increasing. They require absorbent articles to have instant absorption, instant drying, health, antibacterial, breathable, soft and other properties, as well as antibacterial properties. Antibacterial absorbent articles generally have certain effects on leucorrhea, body cold, uterine cold, irregular menstruation, dysmenorrhea, etc. by adding Chinese herbal ingredients. However, when most manufacturers are researching antibacterial absorbent articles, the added Chinese herbal antibacterial materials are limited by temperature and cannot exert their effects to the greatest extent. Some materials require the effect of fumigation to release their maximum effect, but the fumigation temperature is more suitable at 39-42℃. In order to solve this problem, it is necessary to improve the antibacterial absorbent articles. The prior art directly adds a heating layer to sanitary absorbent articles, but such sanitary absorbent articles are prone to causing the temperature to rise too quickly during use, exceeding the expected temperature rise range. The temperature generally exceeds 43°C, and long-term wearing may cause low-temperature burns. Low-temperature burns refer to skin damage caused by long-term contact with liquids or solids at relatively low temperatures (43-51°C). When the skin is in contact with a heat source above 43°C for too long, there is a risk of low-temperature burns, which affects the comfort and safety of the product during use.

[0004] In summary, it is very necessary to provide a self-heating antibacterial absorbent article and a method for manufacturing the same. Summary of the invention

[0005] In order to solve one or more technical problems existing in the prior art, the present invention provides a self-heating antibacterial absorbent article and a manufacturing method thereof.

[0006] In a first aspect, the present invention provides a self-heating antibacterial absorbent article, which comprises, from top to bottom, a surface layer, a guide layer, a self-heating antibacterial absorbent layer and a bottom layer; the self-heating antibacterial absorbent layer comprises, from top to bottom, a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition layer, a first non-woven fabric layer, a self-heating functional super absorbent resin layer and a second non-woven fabric layer.

[0007] Preferably, the preparation of the self-heating super absorbent resin used in the self-heating super absorbent resin layer comprises the following steps:

[0008] (1) preparing an acrylic acid solution with a concentration of 20 to 40 wt %, and then adding a sodium hydroxide solution to adjust the neutralization degree of the acrylic acid to 65 to 75%, to obtain a mixed solution;

[0009] (2) adding an initiator and a cross-linking agent to the mixed solution and mixing them evenly, and then performing a polymerization reaction under ultraviolet light to obtain a colloid;

[0010] (3) granulating the colloid to obtain colloid particles, and then evenly spreading the self-heating functional material on the surface of the colloid particles and repeatedly granulating to obtain modified colloid particles;

[0011] (4) The modified rubber particles are dried, crushed and sieved in sequence, and then surface treated to obtain a self-heating super absorbent resin.

[0012] Preferably, in step (1), the concentration of the acrylic acid solution is 24-39wt%, and in the process of adjusting the neutralization degree of acrylic acid to 65-75%, the temperature of the system is controlled not to exceed 50°C; in step (2), the initiator is benzoin isopropyl ether, and the amount of the initiator is 0.2-1% of the mass of the acrylic acid; and / or in step (2), the cross-linking agent is one or more of N,N-methylenebisacrylamide, glycidyl methacrylate, dipentaerythritol pentaacrylate, triallyl isocyanurate, tetraallyloxyethane, and / or the amount of the cross-linking agent is 0.05-0.2% of the mass of the acrylic acid.

[0013] Preferably, in step (2), the polymerization reaction is carried out under an ultraviolet lamp with a wavelength of 365nm, and the polymerization reaction time is 30 to 50min; and / or in step (3), the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder, the mass ratio of the far-infrared ceramic powder to the heating iron powder is (0.02 to 0.08): (1 to 1.2), and the amount of the self-heating functional material is 0.1 to 1% of the mass of the acrylic acid.

[0014] Preferably, in step (3), granulation is repeated at least 5 times; in step (3), granulation is performed using a meat grinder; in step (4), the drying temperature is 150-180°C, and modified particles with a particle size of 30-80 mesh are obtained by sieving; and / or in step (4), the surface treatment temperature is 160-180°C, the surface treatment time is 20-30 min, the surface treatment agent used for the surface treatment is composed of 30-35 parts by weight of butanediol, 2-3 parts by weight of polybutylene glycol diglycidyl ether and 62-68 parts by weight of deionized water, and modified particles with a particle size of 30-80 mesh are obtained by sieving, and the amount of the surface treatment agent used is 3-5% of the mass of the modified particles.

[0015] Preferably, the antibacterial Chinese medicine composition layer uses an antibacterial Chinese medicine composition comprising Artemisia argyi, Cnidium monnieri, Dictamni cortex, Sophora flavescens, Saposhnikovia divaricata, Atractylodes macrocephala, Phellodendron chinense, Forsythia suspensa, Lonicera japonica and Lithospermum officinale.

[0016] Preferably, the antibacterial Chinese medicine composition comprises the following components in percentage by mass: 3-15% of Artemisia annua, 1-10% of Cnidium monnieri, 1-10% of Dictamni cortex, 1-10% of Sophora flavescens, 1-10% of Saposhnikovia divaricata, 1-10% of Atractylodes lancea, 1-10% of Phellodendron chinense, 1-15% of Forsythia suspensa, 1-10% of Honeysuckle, and 0.5-15% of Lithospermum officinale.

[0017] Preferably, the surface layer is made of fine denier hot air non-woven fabric, and the fiber denier of the fine denier hot air non-woven fabric is 0.2-1.0 denier; the guide layer is made of coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 2.5-5 denier; the first non-woven fabric layer is a fluffy non-woven fabric layer, and preferably, the fluffy non-woven fabric layer is made of coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 3-7 denier; the second non-woven fabric layer is a spunbond non-woven fabric layer; and / or the bottom layer is made of PE film, preferably it is made of breathable PE film.

[0018] Preferably, in the self-heating antibacterial absorption layer, the mass ratio of the wet-made super absorbent resin paper layer, the antibacterial Chinese medicine composition layer, the first non-woven fabric layer, the self-heating super absorbent resin layer and the second non-woven fabric layer is (20-50): (10-25): (10-25): (10-25): (5-10).

[0019] In a second aspect, the present invention provides a method for manufacturing the self-heating antibacterial absorbent article according to the first aspect of the present invention, the method comprising the following steps:

[0020] (a) evenly distributing a self-heating super absorbent resin on the lower layer of the first non-woven fabric layer to form a self-heating super absorbent resin layer, and then laminating a second non-woven fabric layer, and then evenly distributing an antibacterial Chinese medicine composition on the upper layer of the first non-woven fabric layer to form an antibacterial Chinese medicine composition layer, and then compounding a wet-process super absorbent resin absorbent paper layer on the antibacterial Chinese medicine composition layer to obtain a self-heating antibacterial absorption layer;

[0021] (b) a guide layer and a surface layer are sequentially compounded on the upper side of the self-heating antibacterial absorbent layer, and then a bottom layer is compounded under the self-heating antibacterial absorbent layer to obtain a self-heating antibacterial absorbent article.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] (1) The self-heating antibacterial absorbent layer used in the self-heating antibacterial absorbent article of the present invention comprises, from the upper layer to the lower layer, a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition layer, a fluffy non-woven fabric layer, a self-heating functional super absorbent resin layer, and a spunbonded non-woven fabric layer. The use of the self-heating functional super absorbent resin used in the self-heating functional super absorbent resin layer can keep the temperature of the self-heating antibacterial absorbent article controlled at 41-42°C, which is the suitable temperature range for the antibacterial Chinese medicine composition to be fumigated, and can maintain the temperature at 41-42°C for a long time, so that the fumigation can be sustained and the efficacy of the Chinese medicine in the antibacterial Chinese medicine composition can be fully exerted.

[0024] (2) In order to solve the problem of limited functions of Chinese herbal medicine sanitary napkins during use, the self-heating antibacterial absorbent article (Chinese herbal medicine sanitary napkin) of the present invention adopts a self-heating functional super absorbent resin to form a self-heating functional super absorbent resin layer. The present invention adds a self-heating functional material in the process of preparing the super absorbent resin for the first time, so that the prepared self-heating functional super absorbent resin can self-heat when absorbing liquid, store the heat generated by itself and slowly release it, so as to achieve a good heat preservation effect; and the present invention reasonably designs the composition ratio of the self-heating functional material, so that the temperature of 37.5℃ blood can be raised by 3.5-4.5℃ after being absorbed by the super absorbent resin and maintained for about 30 minutes. The whole heat preservation process can maximize the efficacy of Chinese medicine and fully reflect the functionality of the Chinese herbal medicine sanitary napkin.

[0025] (3) When preparing the self-heating functional super absorbent resin, the present invention adopts a unique adding method, that is, the self-heating functional material is evenly sprinkled on the surface of the colloid particles and then repeatedly granulated (repeated granulation and extrusion) to form modified colloid particles with a "fish-eye" structure. The present invention repeatedly squeezes the self-heating functional material into the interior of the colloid particles through the extrusion and crushing action of a meat grinder, that is, the self-heating functional material is wrapped in the interior of the colloid particles (resin particles) to form a "fish-eye" structure. The present invention has found that the "fish-eye" structure formed by the self-heating functional material embedded in the colloid particles effectively improves the heating and heat preservation performance of the self-heating functional material, and can also improve the absorption rate of the super absorbent resin.

[0026] (4) The self-heating antibacterial absorbent article of the present invention has excellent antibacterial properties, can remove odors, and prevent users from having allergic reactions during use. It has a good fumigation effect and can maximize the efficacy of traditional Chinese medicine. It has a very good effect on leucorrhea, body cold, uterine cold, irregular menstruation, and dysmenorrhea. The self-heating antibacterial absorbent article of the present invention has the characteristics of fast absorption speed, low reverse osmosis, good dryness, and large absorption capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings of the present invention are provided for illustration purposes only, and the proportions and sizes of the various parts in the drawings may not be consistent with the actual products.

[0028] Figure 1 1 is a schematic diagram of the structure of a self-heating antibacterial absorbent article in some specific embodiments of the present invention; in the figure, 1: surface layer; 2: guide layer; 3: self-heating antibacterial absorbent layer; 31: wet-made super absorbent resin absorbent paper layer; 32: antibacterial Chinese medicine composition layer; 33: fluffy non-woven fabric layer; 34: self-heating super absorbent resin layer; 35: spunbond non-woven fabric layer; 4: bottom layer;

[0029] Figure 2 1 is an electron microscope image of the self-heating super absorbent resin obtained in Example 1 of the present invention; in the image, image (b) is an enlarged image of part A in image (a);

[0030] Figure 3 1 is an electron microscope image of the highly water-absorbent resin obtained in Comparative Example 1 of the present invention; in the image, image (b) is an enlarged image of portion A in image (a). DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In a first aspect, the present invention provides a self-heating antibacterial absorbent article (also referred to as a self-heating antibacterial absorbent article), for example, Figure 1As shown; the self-heating antibacterial absorbent article includes, from top to bottom, a surface layer 1 (also referred to as a liquid-permeable surface layer), a guide layer 2, a self-heating antibacterial absorbent layer 3 and a bottom layer 4 (also referred to as a breathable bottom layer); the self-heating antibacterial absorbent layer 3 is a five-layer composite core, which includes, from top to bottom, a wet-process super absorbent resin absorbent paper layer 31, an antibacterial Chinese medicine composition layer 32, a first non-woven fabric layer, a self-heating functional super absorbent resin layer 34 and a second non-woven fabric layer; in the present invention, the wet-process super absorbent resin absorbent paper layer is closer to the guide layer than the antibacterial Chinese medicine composition layer; in the present invention, preferably, the The first non-woven fabric layer is a fluffy non-woven fabric layer 33, which is made of fluffy non-woven fabric, and the second non-woven fabric layer is a spunbond non-woven fabric layer 35, which is made of spunbond non-woven fabric; in the present invention, the wet-made super absorbent resin absorbent paper layer adopts wet-made super absorbent resin absorbent paper, and the wet-made super absorbent resin absorbent paper is composed of two layers of base paper layers and a super absorbent resin sandwiched between the two layers of base paper layers. It is prepared by the wet papermaking process in the prior art and is an existing conventional material; the present invention does not make any specific limitation on the antibacterial Chinese medicine composition used in the antibacterial Chinese medicine composition layer, and any Chinese medicine composition with antibacterial effect can be used.

[0033] It is particularly noted that in the present invention Figure 1 In the figure, the structural layers are shown to be peeled off from each other, which is to clearly show the positional relationship between the structural layers of the present invention. However, it should be understood that the structural layers of the present invention are actually tightly fitted together. In the present invention, the structural layers can be bonded together in sequence, for example, by hot melt adhesive.

[0034] The self-heating antibacterial absorbent layer used in the self-heating antibacterial absorbent article of the present invention includes, from the upper layer to the lower layer, a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition layer, a fluffy non-woven fabric layer, a self-heating functional super absorbent resin layer, and a spunbonded non-woven fabric layer. Among them, the use of the self-heating functional super absorbent resin used in the self-heating functional super absorbent resin layer can keep the temperature of the self-heating antibacterial absorbent article controlled at 41-42°C, which is exactly the suitable temperature range for the fumigation of the antibacterial Chinese medicine composition, and can maintain the temperature at 41-42°C for a long time, and can carry out continuous fumigation, so that the efficacy of the Chinese medicine in the antibacterial Chinese medicine composition can be fully exerted; this is because, as is well known, the fumigation temperature of Chinese medicine is preferably 39-42°C, and the fumigation time of Chinese medicine is generally not more than 40 minutes each time. The self-heating antibacterial absorbent article of the present invention has excellent antibacterial performance, can remove odor, and prevent users from having allergic reactions during use. It has a good fumigation effect and can maximize the efficacy of traditional Chinese medicine. It has a very good effect on leucorrhea, body cold, uterine cold, irregular menstruation, and dysmenorrhea. The self-heating antibacterial absorbent article of the present invention has the characteristics of fast absorption speed, low reverse osmosis, good dryness, large absorption capacity, etc.

[0035] According to some preferred embodiments, the preparation of the self-heating super absorbent resin used in the self-heating super absorbent resin layer comprises the following steps:

[0036] (1) preparing an acrylic acid solution with a concentration of 20 to 40 wt %, and then adding a sodium hydroxide solution to adjust the neutralization degree (molar neutralization degree) of the acrylic acid to 65 to 75%, to obtain a mixed solution; in the present invention, the acrylic acid solution is an acrylic acid aqueous solution, and the sodium hydroxide solution is a sodium hydroxide aqueous solution, and the concentration of the sodium hydroxide solution is, for example, 40 to 60 wt %; specifically, step (1) is, for example: taking an appropriate amount of acrylic acid in a 1000 mL flask, adding a certain amount of deionized water so that the concentration of the acrylic acid is controlled at 20 to 40 wt %; adding a sodium hydroxide solution to adjust the molar neutralization degree of the acrylic acid to 65 to 75%; the present invention does not specifically limit the amount of the sodium hydroxide solution used, and it is sufficient to adjust the neutralization degree of the acrylic acid to a range of 65 to 75%;

[0037] (2) adding an initiator and a cross-linking agent to the mixed solution and mixing them uniformly, and then performing a polymerization reaction under ultraviolet light to obtain a colloid; specifically, step (2) is, for example: adding an initiator and a cross-linking agent to the mixed solution and ultrasonically dispersing them until they are uniformly mixed, transferring the mixed solution to which the initiator and the cross-linking agent are added into a quartz tube, and then placing the quartz tube into an ultraviolet light reactor, and performing a polymerization reaction under an ultraviolet lamp with a wavelength of 365 nm to obtain a colloid;

[0038] (3) granulating the colloid to obtain colloid particles, and then evenly spreading the self-heating functional material on the surface of the colloid particles and repeatedly granulating to obtain modified colloid particles; specifically, step (3) is, for example: after the reaction in step (2) is completed and the colloid is obtained, the colloid is taken out and granulated by a meat grinder (one granulation) to obtain colloid particles, and then evenly spreading the self-heating functional material on the surface of the colloid particles and repeatedly granulating (multiple granulations) to obtain modified colloid particles; in the present invention, for example, the particle size of the modified colloid particles is 10 μm to 1 cm, preferably 100 μm to 1 cm, and more preferably 100 μm to 1 mm;

[0039] (4) The modified rubber particles are dried, crushed and sieved in sequence, and then surface treated to obtain a self-heating super absorbent resin.

[0040] In view of the problem of limited functions of Chinese herbal sanitary napkins during use, the self-heating antibacterial absorbent article (Chinese herbal sanitary napkin) in the present invention adopts a self-heating functional super absorbent resin to form a self-heating functional super absorbent resin layer. The present invention adds a self-heating functional material in the process of preparing the super absorbent resin for the first time, so that the prepared self-heating functional super absorbent resin can self-heat when absorbing liquid, store the heat generated by itself and slowly release it, so as to achieve a good thermal insulation effect; and, by reasonably designing the composition ratio of the self-heating functional material, the present invention can increase the temperature of 37.5°C blood by 3.5-4.5°C after being absorbed by the super absorbent resin and maintain it for about 30 minutes. The entire thermal insulation process can maximize the efficacy of Chinese medicine and fully reflect the functionality of the Chinese herbal sanitary napkin. In the preparation of the self-heating functional super absorbent resin, the present invention adopts a unique adding method, that is, the self-heating functional material is evenly sprinkled on the surface of the colloid particles and then repeated granulation (repeated granulation extrusion) is performed, so that the colloid particles with the self-heating functional material sprinkled on the surface form modified colloid particles with a "fish-eye" structure. The present invention repeatedly squeezes the self-heating functional material into the interior of the colloid particles through the extrusion and crushing action of a meat grinder, that is, the self-heating functional material is wrapped in the interior of the colloid particles (resin particles), forming a "fish-eye" structure, for example, Figure 2 As shown; the present invention finds that the present invention enables the self-heating functional material to be embedded in the "fish-eye" structure formed inside the colloid particles, which effectively improves the heating and heat preservation performance of the self-heating functional material, and can also improve the absorption rate of the super absorbent resin. The present invention uniformly squeezes the self-heating functional material into the resin particles through repeated granulation and extrusion. This distribution method can effectively improve the heating efficiency of the super absorbent resin when a small amount of self-heating functional material is added, and at the same time, it can reduce the situation of local overheating and improve the overall self-heating performance of the super absorbent resin. The formed "fish-eye" structure helps to form a relatively closed area inside the resin particles, which is conducive to the accumulation of heat, reduces heat loss, and improves the heat preservation performance of the super absorbent resin, so that the heat can be retained inside the resin for a longer time, so that it can maintain a higher temperature for a longer time; and the "fish-eye" structure formed by repeated granulation and extrusion in the present invention allows certain gaps to exist inside the super absorbent resin, which provides a large number of channels for water molecules to enter the inside of the super absorbent resin, effectively improving the absorption rate of the super absorbent resin. When preparing the self-heating functional super absorbent resin, the present invention neither chooses to add the self-heating functional material during the polymerization process of the super absorbent resin, which will not affect the polymerization reaction and the performance indicators of the super absorbent resin, nor chooses to add the self-heating functional material during the surface treatment process, which will not cause problems such as poor adsorption and uneven mixing.

[0041] According to some preferred embodiments, in step (1), the concentration of the acrylic acid solution is 24-39wt% (e.g., 24wt%, 28wt%, 30wt%, 32wt%, 35wt% or 39wt%). In the present invention, the concentration of the acrylic acid solution is controlled at 20-40wt%, more preferably 24-39wt%. If the concentration of acrylic acid is too low, the reaction activity is low, the reaction time is long, and the colloid obtained after the polymerization is soft and difficult to granulate. If the concentration of acrylic acid is too high, the polymerization reaction rate is fast, which will reduce the water retention performance of the super absorbent resin.

[0042] According to some preferred embodiments, in step (1), in the process of adjusting the neutralization degree of acrylic acid to 65-75%, the temperature of the system is controlled not to exceed 50°C. In the present invention, for example, sodium hydroxide solution is slowly added dropwise to the acrylic acid solution for neutralization, and the temperature of the entire system is kept not to exceed 50°C; in step (2), the initiator (photosensitizer) is benzoin isopropyl ether, and the amount of the initiator is 0.2-1% (e.g., 0.2%, 0.3%, 0.4%, 0.5% or more) of the mass of the acrylic acid. %, 0.6%, 0.7%, 0.8%, 0.9% or 1%); and / or in step (2), the cross-linking agent is one or more of N,N-methylenebisacrylamide, glycidyl methacrylate, dipentaerythritol pentaacrylate, triallyl isocyanurate, tetraallyloxyethane, and / or the amount of the cross-linking agent is 0.05-0.2% (e.g., 0.05%, 0.08%, 0.1%, 0.12%, 0.15%, 0.18% or 0.2%) of the mass of the acrylic acid.

[0043] According to some preferred embodiments, in step (2), the polymerization reaction is carried out under an ultraviolet lamp with a wavelength of 365nm, and the polymerization reaction time is 30 to 50min (for example, 30, 35, 40, 45 or 50min); in the present invention, when carrying out the polymerization reaction, for example, the distance between the ultraviolet lamp source and the polymerization reaction system is maintained at 36 to 37cm; in the present invention, preferably, the polymerization reaction time is 30 to 50min. If the polymerization time is too short, the initiator will produce fewer free radicals, the reaction will be insufficient, and the performance of the prepared resin will be extremely poor. If the polymerization time is too long, the internal cross-linking of the resin will be excessive, which is not conducive to the extension of the water-absorbing structure and will lead to a decrease in the liquid absorption rate.

[0044] According to some preferred embodiments, in step (3), the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder, and the mass ratio of the far-infrared ceramic powder to the heating iron powder is (0.02-0.08):(1-1.2) (for example, 0.02:1, 0.04:1, 0.06:1, 0.08:1, 0.02:1.2, 0.04:1.2, 0.06:1.2 or 0.08:1.2); the present invention does not specifically limit the sources of the far-infrared ceramic powder and the heating iron powder, and products that can be directly purchased can be used. In some specific embodiments of the present invention, for example, the product number produced by Xiamen Green Society Biotechnology Co., Ltd. can be used. The far-infrared ceramic powder is LS-YHY68, for example, the 100-180 mesh heating iron powder with the item number XY-ZGCTF produced by Lingshou County Xuyang Mining Co., Ltd. can be used; the present invention reasonably designs the composition ratio of the self-heating functional material, that is, the mass ratio of the far-infrared ceramic powder to the heating iron powder is (0.02-0.08): (1-1.2), and the temperature of 37.5°C blood can be raised by 3.5-4.5°C after being absorbed by the super absorbent resin and maintained for about 30 minutes. The entire insulation process can maximize the efficacy of traditional Chinese medicine, so that the functionality of sanitary napkins containing traditional Chinese medicine ingredients (such as traditional Chinese medicine sanitary napkins) is fully reflected; the present invention finds that in the self-heating functional material In the energy material, if the proportion of far-infrared ceramic powder is too small and the proportion of heating iron powder is too large, the temperature of the super absorbent resin after absorbing liquid may rise too quickly, exceeding the expected temperature rise range, which may affect the comfort and safety of the product during use, and affect the thermal insulation effect. If the proportion of far-infrared ceramic powder is too large and the proportion of heating iron powder is too small, the heating iron powder cannot provide enough heat, resulting in insufficient heating effect, and will also reduce the thermal insulation effect of the product as well as the efficacy and comfort during use; and / or the amount of the self-heating functional material is 0.1% to 1% (for example, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9% or 1%); in the present invention, preferably, the amount of the self-heating functional material is 0.1-1% of the mass of the acrylic acid. If the amount of the self-heating functional material is too little, it will affect the temperature rise and heat preservation effect of the super absorbent resin after absorbing liquid. If the amount of the self-heating functional material is too much, the temperature rise range of the super absorbent resin after absorbing liquid will exceed the expected temperature rise range, affecting the comfort and safety of the application product. In addition, due to the excessive amount of the self-heating functional material, part of the self-heating material may be easily concentrated on the surface of the colloid particles or in a local area, and a uniform "fish-eye" structure cannot be formed, thereby affecting the temperature rise uniformity and the liquid absorption performance of the super absorbent resin after absorbing liquid.

[0045] According to some preferred embodiments, in step (3), repeated granulation is performed at least 5 times; for example, preferably 5 to 9 times; in the present invention, it is preferred that repeated granulation is performed at least 5 times. The present invention finds that if the number of repeated extrusion and crushing is less than 5 times, it is not enough to effectively embed the self-heating functional material into the interior of the colloid particles, resulting in an unstable or incomplete "fish-eye" structure, which will directly affect the embedding depth of the self-heating functional material. In addition, insufficient repeated extrusion times will also lead to uneven distribution of the self-heating functional material, which is easy to concentrate on the surface of the colloid particles or local areas, and cannot form a uniform "fish-eye" structure, which will ultimately affect the heating effect and thermal insulation effect of the super absorbent resin after absorbing liquid, as well as the absorption rate of the super absorbent resin.

[0046] According to some preferred embodiments, in step (3), a meat grinder is used for granulation; specifically, a meat grinder is used for the granulation and the repeated granulation; in step (4), the drying temperature is 150-180°C (for example, 150°C, 160°C, 170°C or 180°C), and the present invention does not specifically limit the drying time, and the drying can be performed to constant weight, and the modified granules with a particle size of 30-80 mesh are obtained by sieving.

[0047] According to some preferred embodiments, in step (4), the surface treatment temperature is 160-180°C (e.g., 160°C, 170°C or 180°C), and the surface treatment time is 20-30min (e.g., 20, 25 or 30min); the surface treatment agent used in the surface treatment is 30-35 parts by weight (e.g., 30, 31, 32, 33, 34 or 35 parts) of butanediol (1,2-butanediol), 2-3 parts by weight (2, 2.5 or 3 parts) of polybutylene glycol diglycidyl ether and 62-68 parts by weight (e.g., 62, 63, 64, 65) of polybutylene glycol diglycidyl ether. 5, 66, 67 or 68 parts) of deionized water; in the present invention, "parts" refer to "parts by weight". In the specific embodiments and comparative examples, the units of parts by weight can be unified as weight units such as "g" or "kg"; the present invention has no special requirements for polybutylene glycol diglycidyl ether, and can use products that can be directly purchased or products synthesized by existing methods; modified particles with a particle size of 30 to 80 mesh are obtained by sieving, and the amount of the surface treatment agent is 3 to 5% (for example, 3%, 3.5%, 4%, 4.5% or 5%) of the mass of the modified particles.

[0048] According to some preferred embodiments, the antibacterial Chinese medicine composition layer uses an antibacterial Chinese medicine composition comprising wormwood, cnidium monnieri, difficile bark, sophora flavescens, siler, atractylodes, phellodendron, forsythia suspensa, honeysuckle and lithospermum officinale. The present invention finds that the antibacterial Chinese medicine composition layer formed by these ingredients can make the self-heating antibacterial absorbent article have better antibacterial properties; in the present invention, for example, wormwood, cnidium monnieri, difficile bark, sophora flavescens, siler, atractylodes, phellodendron, forsythia suspensa, honeysuckle and lithospermum officinale are evenly mixed to obtain the antibacterial Chinese medicine composition.

[0049] According to some preferred embodiments, the antibacterial Chinese medicine composition comprises the following components in percentage by mass:

[0050] 3-15% of wormwood, 1-10% of cnidium monnieri, 1-10% of dittany, 1-10% of sophora flavescens, 1-10% of siler, 1-10% of atractylodes, 1-10% of phellodendron, 1-15% of forsythia, 1-10% of honeysuckle, and 0.5-15% of lithospermum; in the antibacterial traditional Chinese medicine composition of the present invention, the sum of the mass percentages of the various components is 100%.

[0051] According to some preferred embodiments, the surface layer is made of fine denier hot air non-woven fabric, and the fiber denier of the fine denier hot air non-woven fabric is 0.2-1.0 denier; in the present invention, the surface layer, for example, can also be made of fine denier hot air non-woven fabric containing probiotics and / or prebiotics, which can effectively balance the bacterial flora; the guide layer is made of coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 2.5-5 denier. In the present invention, preferably, a hydrophilic coarse denier hot air non-woven fabric is used; and / or the first non-woven fabric layer is a fluffy non-woven fabric layer, and preferably, the fluffy non-woven fabric layer is made of coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 3-7 denier; in the present invention, both fine denier hot air non-woven fabric and coarse denier hot air non-woven fabric can be made by mixing fibers of different deniers, as long as the fiber deniers of the fine denier hot air non-woven fabric and the coarse denier hot air non-woven fabric are distributed within the preferred denier range.

[0052] According to some preferred embodiments, the second non-woven fabric layer is a spunbonded non-woven fabric layer; and / or the bottom layer is made of a PE film, preferably a breathable PE film.

[0053] According to some preferred embodiments, in the self-heating antibacterial absorption layer, the mass ratio of the wet-made super absorbent resin absorbent paper layer, the antibacterial Chinese medicine composition layer, the first non-woven fabric layer, the self-heating functional super absorbent resin layer and the second non-woven fabric layer is (20-50): (10-25): (10-25): (10-25): (5-10).

[0054] In a second aspect, the present invention provides a method for manufacturing the self-heating antibacterial absorbent article according to the first aspect of the present invention, the method comprising the following steps:

[0055] (a) evenly distributing a self-heating super absorbent resin on the lower layer of the first non-woven fabric layer to form a self-heating super absorbent resin layer, and then laminating a second non-woven fabric layer, and then evenly distributing an antibacterial Chinese medicine composition on the upper layer of the first non-woven fabric layer to form an antibacterial Chinese medicine composition layer, and then compounding a wet-process super absorbent resin absorbent paper layer on the antibacterial Chinese medicine composition layer to obtain a self-heating antibacterial absorption layer;

[0056] (b) a guide layer and a surface layer are sequentially compounded on the upper side of the self-heating antibacterial absorbent layer, and then a bottom layer is compounded under the self-heating antibacterial absorbent layer to obtain a self-heating antibacterial absorbent article.

[0057] According to some specific embodiments, the manufacture of the self-heating antibacterial absorbent article comprises the following steps:

[0058] (a) firstly, a self-heating super absorbent resin is evenly spread on the lower layer of the fluffy non-woven fabric layer to form a self-heating super absorbent resin layer, then a spunbond non-woven fabric layer is attached, and then an antibacterial Chinese medicine composition is evenly spread on the upper layer of the fluffy non-woven fabric layer to form an antibacterial Chinese medicine composition layer, and finally a wet-process super absorbent resin absorbent paper layer is compounded on the antibacterial Chinese medicine composition layer to obtain a self-heating antibacterial absorption layer;

[0059] (b) a guide layer and a surface layer are sequentially compounded on the upper side of the self-heating antibacterial absorbent layer, and then a bottom layer is compounded under the self-heating antibacterial absorbent layer to obtain a self-heating antibacterial absorbent article.

[0060] The present invention will be further described below by way of examples, but the protection scope of the present invention is not limited to these embodiments.

[0061] Example 1

[0062] The present embodiment provides a self-heating antibacterial absorbent article, which includes a surface layer, a guide layer, a self-heating antibacterial absorbent layer, and a bottom layer from top to bottom. The surface layer is a fine denier hot air non-woven fabric with a fiber denier of 0.2-1.0 denier; the guide layer is a coarse denier hot air non-woven fabric with a fiber denier of 2.5-5 denier; the bottom layer is a breathable PE film; the self-heating antibacterial absorbent layer is, from top to bottom, a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition, a fluffy non-woven fabric layer, a self-heating functional super absorbent resin layer, and a spunbond non-woven fabric layer; in the self-heating antibacterial absorbent layer, the wet-made super absorbent resin is The mass ratio of the water-resin absorbent paper layer, the antibacterial Chinese medicine composition layer, the fluffy non-woven fabric layer, the self-heating functional super absorbent resin layer and the spunbond non-woven fabric layer is 40:15:15:15:6; the antibacterial Chinese medicine composition in the antibacterial Chinese medicine composition layer includes, by mass percentage, 10% of Artemisia annua, 10% of Cnidium monnieri, 10% of Dictamni, 8% of Sophora flavescens, 8% of Saposhnikovia divaricata, 10% of Atractylodes lancea, 10% of Phellodendron chinense, 15% of Forsythia suspensa, 9% of Honeysuckle and 10% of Lithospermum officinale.

[0063] The raw materials for preparing the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment include the following components:

[0064] 250 parts by weight of acrylic acid, 194 parts by weight of 50wt% sodium hydroxide aqueous solution, 556 parts by weight of deionized water, 0.3 parts by weight of tetraallyloxyethane, 1.5 parts by weight of isopropyl benzoate, 1.5 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1) and a surface treatment agent (4 parts by weight of the surface treatment agent is sprayed for every 100 parts by weight of the modified particles).

[0065] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment comprises the following steps:

[0066] ① Take 250 parts by weight of acrylic acid in a flask, add 556 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 31wt%; start stirring, cool the flask with ice water, slowly add 194 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 70%, and obtain a mixed solution.

[0067] ② Add 1.5 parts by weight of benzoin isopropyl ether and 0.3 parts by weight of tetraallyloxyethane to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction under an ultraviolet lamp with a wavelength of 365nm for 40 minutes to obtain a colloid.

[0068] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles, and then 1.5 parts by weight of self-heating functional material is evenly sprinkled on the surface of the colloid particles and the granulation is repeated 7 times through a meat grinder to obtain modified colloid particles.

[0069] ④ The modified rubber particles are placed in an oven and dried at 160°C, then crushed and sieved to obtain modified particles of 30 to 80 mesh, and then the surface of the modified particles is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 170°C for 25 minutes. After the surface treatment, the temperature is cooled to room temperature to obtain a self-heating functional super absorbent resin; wherein the amount of the surface treatment agent is sprayed with 4 parts by weight of the surface treatment agent per 100 parts by weight of the modified particles, and the surface treatment agent is a mixture of 32 parts by weight of butanediol, 2.8 parts by weight of polybutylene glycol diglycidyl ether and 65.2 parts by weight of deionized water.

[0070] The electron microscope image of the self-heating super absorbent resin prepared in this embodiment is as follows: Figure 2 shown; from Figure 2 It can be seen that the self-heating functional super absorbent resin prepared in the present invention forms a "fish-eye" structure.

[0071] Example 2

[0072] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0073] The raw materials for preparing the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment include the following components:

[0074] 200 parts by weight of acrylic acid, 166 parts by weight of 50wt% sodium hydroxide aqueous solution, 634 parts by weight of deionized water, 0.4 parts by weight of N,N-methylenebisacrylamide, 2 parts by weight of benzoin isopropyl ether, 0.4 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.02:1) and a surface treatment agent (spray 3 parts by weight of the surface treatment agent for every 100 parts by weight of the modified particles).

[0075] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment comprises the following steps:

[0076] ① Take 200 parts by weight of acrylic acid in a flask, add 634 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 24wt%; start stirring, cool the flask with ice water, slowly add 166 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 75%, and obtain a mixed solution.

[0077] ② Add 2 parts by weight of benzoin isopropyl ether and 0.4 parts by weight of N,N-methylenebisacrylamide to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction for 50 minutes under an ultraviolet lamp with a wavelength of 365nm to obtain a colloid.

[0078] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles, and then 0.4 parts by weight of the self-heating functional material is evenly sprinkled on the surface of the colloid particles and the granulation is repeated 5 times through the meat grinder to obtain modified colloid particles.

[0079] ④ The modified rubber particles are placed in an oven and dried at 160°C, then crushed and sieved to obtain modified particles of 30 to 80 mesh, and then the surface of the modified particles is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 160°C for 30 minutes. After the surface treatment, the temperature is cooled to room temperature to obtain a self-heating functional super absorbent resin; wherein the amount of the surface treatment agent is sprayed with 3 parts by weight of the surface treatment agent per 100 parts by weight of the modified particles, and the surface treatment agent is a mixture of 30 parts by weight of butanediol, 2 parts by weight of polybutylene glycol diglycidyl ether and 68 parts by weight of deionized water.

[0080] Example 3

[0081] Embodiment 3 is substantially the same as Embodiment 1, except that:

[0082] The raw materials for preparing the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment include the following components:

[0083] 300 parts by weight of acrylic acid, 217 parts by weight of 50wt% aqueous sodium hydroxide solution, 483 parts by weight of deionized water, 0.15 parts of N,N-methylenebisacrylamide, 0.03 parts by weight of tetraallyloxyethane, 0.9 parts by weight of isopropyl benzoate, 3 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.07:1.2) and a surface treatment agent (5 parts by weight of the surface treatment agent is sprayed on every 100 parts by weight of the modified particles).

[0084] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this embodiment comprises the following steps:

[0085] ① Take 300 parts by weight of acrylic acid in a flask, add 483 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 38.3wt%; start stirring, cool the flask with ice water, slowly add 217 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 65%, and obtain a mixed solution.

[0086] ② Add 0.9 parts by weight of benzoin isopropyl ether, 0.15 parts by weight of N,N-methylenebisacrylamide and 0.03 parts by weight of tetraallyloxyethane to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction for 30 minutes under an ultraviolet lamp with a wavelength of 365nm to obtain a colloid.

[0087] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles, and then 3 parts by weight of self-heating functional material are evenly sprinkled on the surface of the colloid particles and the granulation is repeated 9 times through a meat grinder to obtain modified colloid particles.

[0088] ④ The modified rubber particles are placed in an oven and dried at 160°C, then crushed and sieved to obtain modified particles of 30 to 80 mesh, and then the surface of the modified particles is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 180°C for 20 minutes. After the surface treatment is completed, it is cooled to room temperature to obtain a self-heating functional super absorbent resin; wherein, the amount of the surface treatment agent is sprayed with 5 parts by weight of the surface treatment agent per 100 parts by weight of the modified particles, and the surface treatment agent is a mixture of 35 parts by weight of butanediol, 3 parts by weight of polybutylene glycol diglycidyl ether and 62 parts by weight of deionized water.

[0089] Example 4

[0090] Embodiment 4 is substantially the same as Embodiment 1, except that:

[0091] In step ③ of preparing the self-heating functional super absorbent resin, the colloid obtained in step ② is granulated once by a meat grinder to obtain colloid particles, and then 1.5 parts by weight of the self-heating functional material is evenly sprinkled on the surface of the colloid particles and granulated three times by a meat grinder to obtain modified colloid particles.

[0092] Example 5

[0093] Embodiment 5 is substantially the same as Embodiment 1, except that:

[0094] When preparing the self-heating functional super absorbent resin, the self-heating functional material used is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.02:1.5.

[0095] Example 6

[0096] Embodiment 6 is substantially the same as Embodiment 1, except that:

[0097] When preparing the self-heating functional super absorbent resin, the self-heating functional material used is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.08:0.8.

[0098] Example 7

[0099] Example 7 is substantially the same as Example 1, except that:

[0100] When preparing the self-heating functional super absorbent resin, 5 parts by weight of the self-heating functional material is used (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1).

[0101] Comparative Example 1

[0102] This comparative example provides an antibacterial absorbent article, which includes a surface layer, a guide layer, an antibacterial absorbent layer, and a bottom layer from top to bottom. The surface layer is a fine denier hot air nonwoven fabric with a fiber denier of 0.2-1.0 denier; the guide layer is a coarse denier hot air nonwoven fabric with a fiber denier of 2.5-5 denier; the bottom layer is a breathable PE film; the antibacterial absorbent layer is a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition, a fluffy nonwoven fabric layer, a super absorbent resin layer, and a spunbond nonwoven fabric layer from top to bottom; in the self-heating antibacterial absorbent layer, the wet-made super absorbent resin The mass ratio of the fat absorbent paper layer, the antibacterial Chinese medicine composition layer, the fluffy non-woven fabric layer, the super absorbent resin layer and the spunbond non-woven fabric layer is 40:15:15:15:6; the antibacterial Chinese medicine composition in the antibacterial Chinese medicine composition layer comprises, by mass percentage, 10% of Artemisia annua, 10% of Cnidium monnieri, 10% of Dictamni, 8% of Sophora flavescens, 8% of Saposhnikovia divaricata, 10% of Atractylodes macrocephala, 10% of Phellodendron chinense, 15% of Forsythia suspensa, 9% of Honeysuckle and 10% of Lithospermum officinale.

[0103] The raw materials for preparing the super absorbent resin used in the super absorbent resin layer in this comparative example include the following components: 250 parts by weight of acrylic acid, 194 parts by weight of 50 wt% sodium hydroxide aqueous solution, 556 parts by weight of deionized water, 0.3 parts by weight of tetraallyloxyethane, 1.5 parts by weight of benzoin isopropyl ether and a surface treatment agent (4 parts by weight of the surface treatment agent is sprayed on every 100 parts by weight of the particulate matter).

[0104] The preparation method of the super absorbent resin used in the super absorbent resin layer in this comparative example comprises the following steps:

[0105] ① Take 250 parts by weight of acrylic acid in a flask, add 556 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 31wt%; start stirring, cool the flask with ice water, slowly add 194 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 70%, and obtain a mixed solution.

[0106] ② Add 1.5 parts by weight of benzoin isopropyl ether and 0.3 parts by weight of tetraallyloxyethane to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction under an ultraviolet lamp with a wavelength of 365nm for 40 minutes to obtain a colloid.

[0107] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles.

[0108] ④ The colloid particles are placed in an oven and dried at 160°C, and then crushed and sieved to obtain 30-80 mesh particles, and then the surface of the particles is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 170°C for 25 minutes. After the surface treatment is completed, it is cooled to room temperature to obtain a highly absorbent resin; wherein the amount of the surface treatment agent is sprayed with 4 parts by weight of the surface treatment agent per 100 parts by weight of the particles, and the surface treatment agent is a mixture of 32 parts by weight of butanediol, 2.8 parts by weight of polybutylene glycol diglycidyl ether and 65.2 parts by weight of deionized water.

[0109] The electron microscope image of the super absorbent resin prepared in this comparative example is as follows: Figure 3 shown.

[0110] Comparative Example 2

[0111] Comparative Example 2 is substantially the same as Example 1, except that:

[0112] The raw materials for preparing the self-heating super absorbent resin layer used in this comparative example include the following components:

[0113] 250 parts by weight of acrylic acid, 194 parts by weight of 50wt% aqueous sodium hydroxide solution, 556 parts by weight of deionized water, 0.3 parts by weight of tetraallyloxyethane, 1.5 parts by weight of isopropyl benzoate, 1.5 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1) and a surface treatment agent (4 parts by weight of the surface treatment agent is sprayed on every 100 parts by weight of the particulate matter).

[0114] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this comparative example comprises the following steps:

[0115] ① Take 250 parts by weight of acrylic acid in a flask, add 556 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 31wt%; start stirring, cool the flask with ice water, slowly add 194 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 70%, and obtain a mixed solution.

[0116] ② Add 1.5 parts by weight of benzoin isopropyl ether, 0.3 parts by weight of tetraallyloxyethane and 1.5 parts by weight of self-heating functional material to the mixed solution obtained in step ①, and ultrasonically disperse until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction for 40 minutes under an ultraviolet lamp with a wavelength of 365nm to obtain a colloid.

[0117] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles.

[0118] ④ The colloid particles are placed in an oven and dried at 160°C, and then crushed and sieved to obtain 30-80 mesh particles, and then the surface of the particles is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 170°C for 25 minutes. After the surface treatment is completed, it is cooled to room temperature to obtain a self-heating functional super absorbent resin; wherein the amount of the surface treatment agent is sprayed with 4 parts by weight of the surface treatment agent per 100 parts by weight of the particles, and the surface treatment agent is a mixture of 32 parts by weight of butanediol, 2.8 parts by weight of polybutylene glycol diglycidyl ether and 65.2 parts by weight of deionized water.

[0119] Comparative Example 3

[0120] Comparative Example 3 is substantially the same as Example 1, except that:

[0121] The raw materials for preparing the self-heating super absorbent resin layer used in this comparative example include the following components:

[0122] 250 parts by weight of acrylic acid, 194 parts by weight of 50wt% aqueous sodium hydroxide solution, 556 parts by weight of deionized water, 0.3 parts by weight of tetraallyloxyethane, 1.5 parts by weight of isopropyl benzoate, 1.5 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1) and a surface treatment agent (4 parts by weight of the surface treatment agent is sprayed on every 100 parts by weight of the particulate matter).

[0123] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this comparative example comprises the following steps:

[0124] ① Take 250 parts by weight of acrylic acid in a flask, add 556 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 31wt%; start stirring, cool the flask with ice water, slowly add 194 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 70%, and obtain a mixed solution.

[0125] ② Add 1.5 parts by weight of benzoin isopropyl ether and 0.3 parts by weight of tetraallyloxyethane to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction under an ultraviolet lamp with a wavelength of 365nm for 40 minutes to obtain a colloid.

[0126] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles.

[0127] ④ Place the colloid particles in an oven and dry them at 160°C, then crush and sieve to obtain 30-80 mesh particles, then spray the surface treatment agent on the surface of the particles and mix them evenly, then place them in an oven and treat them at 170°C for 25 minutes. After the surface treatment, cool them to room temperature to obtain a self-heating functional super absorbent resin; wherein the amount of the surface treatment agent is 4 parts by weight of the surface treatment agent sprayed per 100 parts by weight of the particles, and the surface treatment agent is mixed with 32 parts by weight of butanediol, 2.8 parts by weight of polybutylene glycol diglycidyl ether, 65.2 parts by weight of deionized water and 1.5 parts by weight of self-heating functional material.

[0128] Comparative Example 4

[0129] Comparative Example 4 is substantially the same as Example 1, except that:

[0130] The raw materials for preparing the self-heating super absorbent resin layer used in this comparative example include the following components:

[0131] 250 parts by weight of acrylic acid, 194 parts by weight of 50wt% aqueous sodium hydroxide solution, 556 parts by weight of deionized water, 0.3 parts by weight of tetraallyloxyethane, 1.5 parts by weight of isopropyl benzoate, 1.5 parts by weight of self-heating functional material (the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1) and a surface treatment agent (4 parts by weight of the surface treatment agent is sprayed on every 100 parts by weight of the particulate matter).

[0132] The preparation method of the self-heating super absorbent resin used in the self-heating super absorbent resin layer in this comparative example comprises the following steps:

[0133] ① Take 250 parts by weight of acrylic acid in a flask, add 556 parts by weight of deionized water to obtain an acrylic acid aqueous solution with a concentration of 31wt%; start stirring, cool the flask with ice water, slowly add 194 parts by weight of a 50% sodium hydroxide aqueous solution, control the system temperature within 50°C, adjust the molar neutralization degree of acrylic acid to 70%, and obtain a mixed solution.

[0134] ② Add 1.5 parts by weight of benzoin isopropyl ether and 0.3 parts by weight of tetraallyloxyethane to the mixed solution obtained in step ①, and disperse by ultrasonic until the mixture is uniformly mixed to obtain a polymerization reaction system, transfer the polymerization reaction system to a quartz tube, and then place the quartz tube in an ultraviolet reactor, and perform polymerization reaction under an ultraviolet lamp with a wavelength of 365nm for 40 minutes to obtain a colloid.

[0135] ③ The colloid obtained in step ② is granulated once through a meat grinder to obtain colloid particles.

[0136] ④ The granules are placed in an oven and dried at 160°C, then crushed and sieved to obtain granules of 30 to 80 mesh, and then the surface of the granules is sprayed with a surface treatment agent and mixed evenly, and then placed in an oven for surface treatment at 170°C for 25 minutes. After the surface treatment, the temperature is cooled to room temperature to obtain resin particles; wherein the amount of the surface treatment agent is sprayed with 4 parts by weight of the surface treatment agent per 100 parts by weight of the granules, and the surface treatment agent is a mixture of 32 parts by weight of butanediol, 2.8 parts by weight of polybutylene glycol diglycidyl ether and 65.2 parts by weight of deionized water.

[0137] ⑤ Add 1.5 parts by weight of self-heating functional material to the resin particles obtained in step ④ and mix them evenly to obtain a self-heating functional super absorbent resin.

[0138] Comparative Example 5

[0139] This comparative example provides a self-heating antibacterial absorbent article, which includes a surface layer, a guide layer, a self-heating antibacterial absorbent layer, and a bottom layer from top to bottom. The surface layer is a fine denier hot air non-woven fabric with a fiber denier of 0.2-1.0 denier; the guide layer is a coarse denier hot air non-woven fabric with a fiber denier of 2.5-5 denier; the bottom layer is a breathable PE film; the self-heating antibacterial absorbent layer includes a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition, a fluffy non-woven fabric layer, a super absorbent resin layer, a heating layer, and a spunbond non-woven fabric layer from top to bottom; in the self-heating antibacterial absorbent layer, the mass ratio of the wet-made super absorbent resin absorbent paper layer, the antibacterial Chinese medicine composition layer, the fluffy non-woven fabric layer, the super absorbent resin layer, the heating layer, and the spunbond non-woven fabric layer is 40:15:1 5:15:15:6; the antibacterial Chinese medicine composition in the antibacterial Chinese medicine composition layer includes, by mass percentage, 10% of Artemisia annua, 10% of Cnidium monnieri, 10% of Dictamni cortex, 8% of Sophora flavescens, 8% of Saposhnikovia divaricata, 10% of Atractylodes macrocephala, 10% of Phellodendron chinense, 15% of Forsythia suspensa, 9% of Lonicera japonica and 10% of Lithospermum officinale; the heating layer is formed by a self-heating functional material, which is a mixture of far-infrared ceramic powder and heating iron powder in a mass ratio of 0.04:1; the preparation of the super absorbent resin used in the super absorbent resin layer in this comparative example is the same as the preparation of the super absorbent resin used in Comparative Example 1.

[0140] When the temperature difference and heat preservation time of the self-heating antibacterial absorbent article in this comparative example were measured by the same test method of the present invention, it was found that the temperature of the self-heating antibacterial absorbent article in this comparative example rose too fast, exceeding the expected temperature rise range, and the temperature exceeded 44°C. The heat preservation time can reach about 1.5 hours, and there is a risk of low-temperature burns when worn for a long time.

[0141] The present invention tests the water absorption rate and water retention rate of the super absorbent resin in each embodiment and comparative examples 1 to 4, and the results are shown in Table 1; the present invention tests the absorption speed, blood absorption temperature difference and heat preservation time of the super absorbent resin in each embodiment and comparative examples 1 to 4, and the results are shown in Table 1. The testing method is: in a constant temperature environment of 37.5°C, 2g of super absorbent resin is poured into 25mL of animal blood at 37.5°C and stirred, and timing is started at the same time until there are no lumps and white particles, and the animal blood is allowed to stand until the animal blood is completely absorbed, and the time for the absorption to be completed is recorded as the absorption speed, in seconds; the temperature change is recorded, and when the temperature no longer rises, the temperature difference is obtained by subtracting the initial temperature of 37.5°C from the final temperature, and after reaching the highest temperature, the duration of the final temperature is the heat preservation time.

[0142] Table 1: Performance comparison results of the super absorbent resins in each embodiment and comparative examples 1 to 4.

[0143]

[0144] From the results in Table 1, it can be seen that the self-heating functional super absorbent resin in Examples 1 to 3 of the present invention can effectively improve the absorption speed of the super absorbent resin compared with the conventional super absorbent resin. The present invention adds a self-heating functional material. The self-heating functional super absorbent resin used in the preferred embodiments 1 to 3 of the present invention can increase the temperature of the entire system by 3.5 to 4.5°C after absorbing liquid, and can stably maintain the temperature of the system at 41-42°C for about thirty minutes. It is well known that the fumigation temperature of traditional Chinese medicine is preferably 39-42°C, and the fumigation time of traditional Chinese medicine is generally not more than 40 minutes each time. Therefore, the self-heating functional super absorbent resin in the present invention is applied to functional sanitary napkins, especially traditional Chinese medicine sanitary napkins, which can fully and lastingly exert the efficacy of traditional Chinese medicine, and play a significant role in improving and enhancing the performance of sanitary napkins.

[0145] The present invention conducted performance tests on the absorbent articles in Examples 1 to 7 and Comparative Examples 1 to 4. The performance test results are shown in Tables 2 and 3.

[0146] Test method 1: Take animal blood twice, 5 mL each time, with an interval of 10 minutes between the two times, and record the time for each absorption completion as the absorption rate, in seconds; reverse osmosis is that after the absorbent article (sanitary napkin) absorbs 5 mL of animal blood, a 1.2 kg weight is pressed on 10 g of filter paper and placed on the absorbent article for 1 minute, and the increased weight of the filter paper is weighed, in grams. The results are shown in Table 2.

[0147] Test method 2: Pour 15 mL of animal blood at 37.5°C onto the absorbent article in a constant temperature environment of 37.5°C until the animal blood is completely absorbed, and record the temperature change. When the temperature no longer rises, the temperature difference is calculated by subtracting the initial temperature of 37.5°C from the final temperature. After reaching the highest temperature, the duration of the final temperature is the insulation time. The results are shown in Table 3.

[0148] Table 2: Absorption performance and dryness test results of the absorbent articles in Example 1 of the present invention and Comparative Examples 1 to 4.

[0149]

[0150] Table 3: Temperature rise and heat preservation test results of the absorbent articles in Examples 1 to 7 of the present invention and Comparative Examples 1 to 4.

[0151]

[0152]

[0153] Parts of the present invention that are not described in detail are well known to those skilled in the art.

[0154] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-heating antibacterial absorbent article, characterized in that: The self-heating antibacterial absorbent article comprises, from top to bottom, a surface layer, a guide layer, a self-heating antibacterial absorbent layer and a bottom layer; The self-heating antibacterial absorption layer includes, from top to bottom, a wet-made super absorbent resin absorbent paper layer, an antibacterial Chinese medicine composition layer, a first non-woven fabric layer, a self-heating functional super absorbent resin layer, and a second non-woven fabric layer.

2. The self-heating antibacterial absorbent article according to claim 1, characterized in that: The preparation of the self-heating super absorbent resin used in the self-heating super absorbent resin layer comprises the following steps: (1) preparing an acrylic acid solution with a concentration of 20 to 40 wt %, and then adding a sodium hydroxide solution to adjust the neutralization degree of the acrylic acid to 65 to 75%, to obtain a mixed solution; (2) adding an initiator and a cross-linking agent to the mixed solution and mixing them evenly, and then performing a polymerization reaction under ultraviolet light to obtain a colloid; (3) granulating the colloid to obtain colloid particles, and then evenly spreading the self-heating functional material on the surface of the colloid particles and repeatedly granulating to obtain modified colloid particles; (4) The modified rubber particles are dried, crushed and sieved in sequence, and then surface treated to obtain a self-heating super absorbent resin.

3. The self-heating antibacterial absorbent article according to claim 2, characterized in that: In step (1), the concentration of the acrylic acid solution is 24 to 39 wt %, and during the process of adjusting the neutralization degree of acrylic acid to 65 to 75%, the temperature of the system is controlled not to exceed 50° C.; In step (2), the initiator is benzoin isopropyl ether, and the amount of the initiator is 0.2-1% of the mass of the acrylic acid; and / or In step (2), the crosslinking agent is one or more of N,N-methylenebisacrylamide, glycidyl methacrylate, dipentaerythritol pentaacrylate, triallyl isocyanurate, tetraallyloxyethane, and / or the amount of the crosslinking agent is 0.05-0.2% of the mass of the acrylic acid.

4. The self-heating antibacterial absorbent article according to claim 2, characterized in that: In step (2), a polymerization reaction is carried out under a UV lamp with a wavelength of 365 nm, and the polymerization reaction time is 30 to 50 minutes; and / or In step (3), the self-heating functional material is a mixture of far-infrared ceramic powder and heating iron powder, the mass ratio of the far-infrared ceramic powder to the heating iron powder is (0.02-0.08):(1-1.2), and the amount of the self-heating functional material is 0.1-1% of the mass of the acrylic acid.

5. The self-heating antibacterial absorbent article according to claim 2, characterized in that: In step (3), the granulation is repeated at least 5 times; In step (3), granulation is performed using a meat grinder; In step (4), the drying temperature is 150-180° C., and the modified particles with a particle size of 30-80 mesh are obtained by sieving; and / or In step (4), the surface treatment temperature is 160-180° C., the surface treatment time is 20-30 min, the surface treatment agent used in the surface treatment is composed of 30-35 parts by weight of butanediol, 2-3 parts by weight of polybutylene glycol diglycidyl ether and 62-68 parts by weight of deionized water, and the modified particles with a particle size of 30-80 mesh are obtained by screening. The amount of the surface treatment agent is 3-5% of the mass of the modified particles.

6. The self-heating antibacterial absorbent article according to claim 1, characterized in that: The antibacterial Chinese medicine composition layer adopts the antibacterial Chinese medicine composition comprising Artemisia argyi, Cnidium monnieri, Dictamni cortex, Sophora flavescens, Saposhnikovia divaricata, Atractylodes macrocephala, Phellodendron chinense, Forsythia suspensa, Honeysuckle and Lithospermum officinale.

7. The self-heating antibacterial absorbent article according to claim 6, characterized in that: The antibacterial Chinese medicine composition comprises the following components in percentage by mass: Artemisia annua 3-15%, Cnidium monnieri 1-10%, Dictamni cortex 1-10%, Sophora flavescens 1-10%, Saposhnikovia divaricata 1-10%, Atractylodes 1-10%, Phellodendron chinense 1-10%, Forsythia suspensa 1-15%, Honeysuckle 1-10%, Lithospermum officinale 0.5-15%.

8. The self-heating antibacterial absorbent article according to claim 1, characterized in that: The surface layer is made of fine denier hot air non-woven fabric, and the fiber denier of the fine denier hot air non-woven fabric is 0.2 to 1.0 denier; The guide layer is made of coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 2.5 to 5 denier; The first non-woven fabric layer is a fluffy non-woven fabric layer. Preferably, the fluffy non-woven fabric layer is made of a coarse denier hot air non-woven fabric, and the fiber denier of the coarse denier hot air non-woven fabric is 3 to 7 denier; The second nonwoven fabric layer is a spunbonded nonwoven fabric layer; and / or The bottom layer is made of PE film, preferably a breathable PE film.

9. The self-heating antibacterial absorbent article according to claim 1, characterized in that: In the self-heating antibacterial absorption layer, the mass ratio of the wet-made super absorbent resin absorbent paper layer, the antibacterial Chinese medicine composition layer, the first non-woven fabric layer, the self-heating super absorbent resin layer and the second non-woven fabric layer is (20-50): (10-25): (10-25): (10-25): (5-10).

10. The method for producing a self-heating antibacterial absorbent article according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: (a) evenly distributing a self-heating super absorbent resin on the lower layer of the first non-woven fabric layer to form a self-heating super absorbent resin layer, and then laminating a second non-woven fabric layer, and then evenly distributing an antibacterial Chinese medicine composition on the upper layer of the first non-woven fabric layer to form an antibacterial Chinese medicine composition layer, and then compounding a wet-process super absorbent resin absorbent paper layer on the antibacterial Chinese medicine composition layer to obtain a self-heating antibacterial absorption layer; (b) a guide layer and a surface layer are sequentially compounded on the upper side of the self-heating antibacterial absorbent layer, and then a bottom layer is compounded under the self-heating antibacterial absorbent layer to obtain a self-heating antibacterial absorbent article.

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