An antibacterial medical care pad and its manufacturing process

Abstract

This invention relates to an antibacterial medical care pad and its manufacturing process. From top to bottom, it comprises a soft layer, an antibacterial layer, an absorbent layer, and a breathable layer. The antibacterial layer, by weight, comprises the following components: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The absorbent layer, by weight, comprises the following components: 100 parts acrylic resin, 10-15 parts viscose fiber, 15-20 parts long-staple cotton, and 3-8 parts antibacterial agent. The nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5). The antibacterial core shell comprises the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, and carboxymethyl chitosan. This invention improves the antibacterial performance of the pad by placing an antibacterial layer between the soft layer and the absorbent layer. The addition of an antibacterial agent to the absorbent layer enhances its antibacterial performance, thereby reducing the overall antibacterial performance of the pad. Furthermore, the breathable layer facilitates the timely removal of moisture, reducing patient discomfort.

Description

Technical Field

[0001] This invention relates to the field of medical consumables manufacturing technology, specifically to an antibacterial medical care pad and its manufacturing process. Background Technology

[0002] Nursing pads are disposable sanitary products made of materials such as PE film, non-woven fabric, fluff pulp, and resin. They are mainly used in hospitals during surgery, gynecological examinations, postpartum care, infant care, and for paralyzed patients with urinary or fecal incontinence, as well as for women during menstruation. As disposable medical mattress pads, they are essential medical consumables in clinical practice. During use, blood, urine, or other bodily fluids are absorbed by the nursing pad to prevent contamination of the bed sheets, thereby keeping the sheets and the patient's skin dry and clean, and reducing the risk of infection.

[0003] Currently, medical nursing pads typically consist of a top layer, an absorbent layer, and a bottom layer. The pads are sterilized before being used by patients. However, this only ensures that the pads are sterile before use. During use, the presence of bodily fluids can cause bacteria to grow. Since existing nursing pads do not have antibacterial properties, bacteria can grow on the pads during use, which may affect the patient's health. Summary of the Invention

[0004] This invention provides an antibacterial medical care pad and its manufacturing process to solve the above-mentioned problems.

[0005] The technical solution adopted in this invention is: an antibacterial medical care pad, which comprises, from top to bottom, a soft layer, an antibacterial layer, an absorbent layer, and a breathable layer. The antibacterial layer comprises, by weight, the following components: 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The structural formula of the antibacterial powder is shown in Formula 1.

[0006]

[0007] The absorbent layer comprises the following components by weight: 100 parts acrylic resin, 10-15 parts viscose fiber, 15-20 parts long-staple cotton, and 3-8 parts antibacterial agent.

[0008] Preferably, the nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5), wherein the antibacterial core shell comprises the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, and carboxymethyl chitosan.

[0009] Preferably, the preparation method of the modified nano-titanium dioxide includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, adding 15% by mass of γ-aminopropyltriethoxysilane to the nano-silica, reacting at 75°C for 10 hours, and obtaining modified nano-silica after cooling, centrifugation, washing, and drying.

[0010] Preferably, the method for preparing the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80°C for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0011] Preferably, the antibacterial agent components and preparation method are the same as those of the antibacterial core shell.

[0012] Preferably, the breathable layer is composed of chitosan fiber nonwoven fabric and PE polymer breathable membrane; the comfort layer is made of soft nonwoven fabric.

[0013] Preferably, the absorbent layer is provided with flow grooves at intervals, the openings of the flow grooves are close to the breathable layer, and a flow area is bonded inside the flow groove. The flow area is made of three-dimensional permeable material spirally arranged from the inside to the outside along the central axis of the flow groove. The three-dimensional permeable material includes a support layer, a resin layer, a breathable layer, a resin layer and a support layer in sequence from the inside to the outside. The outer walls of the two support layers are also fixedly connected with protrusions that are spaced apart. The protrusions are made of absorbent pulp, and the breathable layer is a rigid material with a V-shape.

[0014] The manufacturing process of this nursing pad includes at least the following steps:

[0015] S1: Mix antibacterial powder and 6% by weight of polyethylene in the raw material, extrude and granulate to obtain antibacterial masterbatch;

[0016] S2: The antibacterial masterbatch is mixed with the remaining parts by weight of polyethylene to obtain uniformly mixed granules, and the resulting granules are melt-extruded, spun, and web-laid to obtain the base fabric;

[0017] S3: The base fabric is surface activated using oxygen plasma to obtain an activated base fabric;

[0018] S4: The activated base fabric is powdered by a powder spreader, which sprinkles nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on its surface is then treated by a far-infrared radiator and needle-punched to obtain an antibacterial layer.

[0019] S5: Acrylic resin, viscose fiber, long-staple cotton, and antibacterial agent are mixed, melt-extruded, spun, and web-laid to obtain the conventional absorbent layer;

[0020] S6: The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed together to obtain the final product.

[0021] Preferably, in step S5, the conventional absorbent layer is perforated by a punch to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer, and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and bonded to the opening to obtain an improved absorbent layer. A conventional absorbent layer is hot-pressed onto one side of the improved absorbent layer to obtain the absorbent layer.

[0022] Preferably, in step S3, the vacuum degree for surface activation treatment of the base fabric is 50-80 MPa, the temperature is 40-50℃, the gas flow rate is 220-290 sccm, the power is 120-220 W, and the treatment time is 5-12 min.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] (1) The present invention improves the antibacterial performance of the nursing pad by setting an antibacterial layer between the soft layer and the absorbent layer. The antibacterial layer contains antibacterial powder, which has strong antioxidant properties. It can destroy the cell membrane of bacteria, inhibit bacterial biosynthesis, and kill bacteria. At the same time, the antibacterial powder can also inhibit bacterial adhesion and biofilm formation, thus ensuring the antibacterial performance of the antibacterial layer. The absorbent layer is set to facilitate the absorption of body fluids entering the nursing pad. At the same time, since the presence of liquid in the absorbent layer can easily breed bacteria, it may reduce the antibacterial performance of the nursing pad. Therefore, an antibacterial agent is added to the absorbent layer to improve the antibacterial performance of the absorbent layer and thus reduce the antibacterial performance of the nursing pad. In addition, the breathable layer is set to facilitate the timely discharge of moisture and reduce patient discomfort.

[0025] (2) The antibacterial core shell is made of cerium tungstate and doped with elements such as magnesium and lanthanum. The outer part of the core shell also includes carboxymethyl chitosan, which ensures the excellent antibacterial properties of the antibacterial core shell. At the same time, the carboxymethyl chitosan setting also makes the antibacterial core shell easy to disperse and reduces the aggregation of the antibacterial core shell.

[0026] (3) The spirally arranged three-dimensional permeable material bonded inside the flow channel provides a channel for gas flow, accelerating the discharge of hot and humid gas from the absorbent layer through the breathable layer, reducing the accumulation of hot and humid gas to keep the nursing pad dry and ensure patient comfort. In addition, if backflow occurs in the breathable layer, the protrusions, resin layer, and support layer can all absorb the backflowed liquid. At the same time, the absorbent layer at the top of the flow channel will also absorb the backflowed liquid, reducing the discomfort caused to the patient by the backflowed liquid. Detailed Implementation

[0027] To better illustrate the present invention, it will now be further described in conjunction with examples.

[0028] An antibacterial medical care pad, comprising, from top to bottom, a soft layer, an antibacterial layer, an absorbent layer, and a breathable layer. The antibacterial layer comprises, by weight, 100 parts polypropylene, 3-8 parts antibacterial powder, and 2-5 parts nanoparticles. The structural formula of the antibacterial powder is shown in Formula 1.

[0029]

[0030] The absorbent layer comprises, by weight, the following components: 100 parts acrylic resin, 10-15 parts viscose fiber, 15-20 parts long-staple cotton, and 3-8 parts antibacterial agent. By placing an antibacterial layer between the soft layer and the absorbent layer, the antibacterial performance of the pad is improved. The antibacterial layer contains antibacterial powder with strong antioxidant properties, which can destroy bacterial cell membranes, inhibit bacterial biosynthesis, and thus kill bacteria. Simultaneously, the antibacterial powder can also inhibit bacterial adhesion and biofilm formation, thereby ensuring the antibacterial performance of the antibacterial layer. The absorbent layer facilitates the absorption of bodily fluids entering the pad. However, since the presence of liquid in the absorbent layer can easily lead to bacterial growth, potentially reducing the antibacterial performance of the pad, an antibacterial agent is added to the absorbent layer to enhance its antibacterial performance and thus reduce the overall antibacterial performance of the pad. Furthermore, the breathable layer facilitates the timely removal of moisture, reducing patient discomfort.

[0031] Preferably, the nanoparticles comprise modified nano-silica and an antibacterial core shell, with a mass ratio of 1:(2-5), wherein the antibacterial core shell comprises the following components: cerium nitrate, lanthanum nitrate, sodium tungstate, and carboxymethyl chitosan.

[0032] Preferably, the preparation method of the modified nano-titanium dioxide includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane to the nano-silica. The mixture is reacted at 75°C for 10 hours, and after cooling, centrifugation, washing, and drying, the modified nano-silica is obtained. The modified nano-silica is less prone to agglomeration, and the amination of the silica improves the bonding ability between the silica and the nonwoven fabric, ensuring the durability of the antibacterial properties of the nursing pad.

[0033] Preferably, the method for preparing the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7-8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, and continuing the reaction at 80°C for 5 hours. After post-treatment, the product is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2. The antibacterial core shell uses cerium tungstate as the core and is doped with elements such as magnesium and lanthanum. The core also includes carboxymethyl chitosan on the outside, which ensures the excellent antibacterial properties of the antibacterial core shell. Simultaneously, the addition of carboxymethyl chitosan makes the antibacterial core shell easy to disperse, reducing aggregation.

[0034] Preferably, the antibacterial agent components and preparation method are the same as those of the antibacterial core shell. Setting the antibacterial agent components in the absorbent layer to have the same structure as the antibacterial layer reduces the complexity of the manufacturing of this nursing pad to some extent.

[0035] Preferably, the breathable layer is composed of chitosan fiber nonwoven fabric and PE polymer breathable membrane; the comfort layer is made of soft nonwoven fabric.

[0036] Preferably, the absorbent layer has flow channels spaced apart, with the openings of the flow channels close to the breathable layer. A flow area is bonded inside the flow channel, and the flow area is a three-dimensional permeable material spirally arranged from the inside to the outside along the central axis of the flow channel. That is, the three-dimensional permeable material is a three-dimensional structure spirally wound layer by layer from the inside to the outside, and its outer wall is bonded to the inner wall of the flow channel. The three-dimensional permeable material includes, from the inside to the outside, a support layer, a resin layer, a breathable layer, a resin layer, and a support layer. The outer walls of the two support layers are also fixedly connected with spaced protrusions made of absorbent pulp. The breathable layer is a V-shaped rigid pulp, which connects the resin layers on both sides of the breathable layer and increases the air circulation space. The support layer is also made of rigid pulp, and the hardness of the rigid pulp of the breathable layer and the support layer can be selected according to actual needs. The spiral arrangement of the three-dimensional transparent material creates a certain gap between two adjacent layers of the three-dimensional transparent material, and the protrusion ensures the existence of the gap between the two adjacent layers of the three-dimensional transparent material.

[0037] Because the absorbent layer of this nursing pad absorbs bodily fluids and generates warm, moist gas, which cools down upon reaching the breathable layer, creating a temperature difference between the absorbent and breathable layers, a spirally arranged, three-dimensional permeable material bonded within the flow channel provides a passageway for the gas. The raised sections ensure sufficient volume for this flow channel, and the V-shaped breathable layer further increases this volume, accelerating the expulsion of warm, moist gas from the absorbent layer through the breathable layer. This reduces the accumulation of warm, moist gas, keeping the nursing pad dry and ensuring patient comfort. Furthermore, if backflow occurs within the breathable layer, the raised sections, resin layer, and support layer can absorb the backflowed liquid. Simultaneously, the absorbent layer at the top of the flow channel also absorbs the backflowed liquid, reducing discomfort caused by the backflow.

[0038] The manufacturing process of this nursing pad includes at least the following steps:

[0039] S1: Mix antibacterial powder and 6% by weight of polyethylene in the raw material, extrude and granulate to obtain antibacterial masterbatch;

[0040] S2: The antibacterial masterbatch is mixed with the remaining parts by weight of polyethylene to obtain uniformly mixed granules, and the resulting granules are melt-extruded, spun, and web-laid to obtain the base fabric;

[0041] S3: The base fabric is surface activated by oxygen plasma to obtain an activated base fabric. The surface properties of the activated base fabric change, the number of polar groups increases, which can effectively improve the hydrophilicity of the base fabric and provide more active sites to facilitate the adhesion of nanoparticles.

[0042] S4: The activated base fabric is powdered by a powder spreader, which sprinkles nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on its surface is then treated by a far-infrared radiator and needle-punched to obtain an antibacterial layer.

[0043] S5: Acrylic resin, viscose fiber, long-staple cotton, and antibacterial agent are mixed, melt-extruded, spun, and web-laid to obtain the conventional absorbent layer;

[0044] S6: The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed together to obtain the final product.

[0045] Preferably, in step S5, the conventional absorbent layer is perforated by a punch to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer, and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and bonded to the opening to obtain an improved absorbent layer. A conventional absorbent layer is hot-pressed onto one side of the improved absorbent layer to obtain the absorbent layer.

[0046] Preferably, in step S3, the vacuum degree for surface activation treatment of the base fabric is 50-80 MPa, the temperature is 40-50℃, the gas flow rate is 220-290 sccm, the power is 120-220 W, and the treatment time is 5-12 min.

[0047] Example 1

[0048] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0049] The manufacturing process of this nursing pad includes at least the following steps:

[0050] (1) Mix 8 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0051] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0052] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 60MPa, the temperature was 50℃, the gas flow rate was 290sccm, the power was 200W, and the treatment time was 12min to obtain the activated base fabric.

[0053] (4) The activated base fabric is powdered using a powder spreader. The powder spreader sprinkles 5 parts of nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on the surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles include modified nano-silica and antibacterial core shell, with a mass ratio of 1:5. The preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane from the nano-silica. The reaction is carried out at 75°C for 10 hours, followed by cooling, centrifugation, and washing. After washing and drying, modified nano-silica is obtained; the preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7.8, adding hexadecyltrimethylammonium bromide, reacting at 80℃ for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80℃ for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2;

[0054] (5) Mix 100 parts of acrylic resin, 15 parts of viscose fiber, 15 parts of long-staple cotton and 3 parts of antibacterial agent, melt extrude, spin and lay web to obtain a conventional absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0055] (6) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0056] (7) Weight is 28g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 25 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 28g / m². 2 Soft nonwoven fabric;

[0057] (8) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0058] Example 2

[0059] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0060] The manufacturing process of this nursing pad includes at least the following steps:

[0061] (1) Mix 5 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0062] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0063] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 80MPa, the temperature was 45℃, the gas flow rate was 220sccm, the power was 220W, and the treatment time was 10min to obtain the activated base fabric.

[0064] (4) The activated base fabric is powdered using a powder spreader. Two portions of nanoparticles are sprinkled onto the surface of the activated base fabric via a vibrating screen. The activated base fabric with nanoparticles on its surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles consist of modified nano-silica and an antibacterial core shell, with a mass ratio of 1:2. The preparation method of the modified nano-silica includes: activating the nano-silica in a 120°C drying oven for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane to the nano-silica mixture. The reaction is carried out at 75°C for 10 hours, followed by cooling and centrifugation. After washing and drying, modified nano-silica is obtained. The preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, and continuing the reaction at 80°C for 5 hours. After post-treatment, the product is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0065] (5) Mix 100 parts of acrylic resin, 12 parts of viscose fiber, 18 parts of long-staple cotton and 6 parts of antibacterial agent, melt extrude, spin and lay web to obtain a conventional absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0066] (6) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0067] (7) Weight is 20g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 20 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 205g / m². 2 Soft nonwoven fabric;

[0068] (8) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0069] Example 3

[0070] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0071] The manufacturing process of this nursing pad includes at least the following steps:

[0072] (1) Mix 3 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0073] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0074] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 50MPa, the temperature was 40℃, the gas flow rate was 270sccm, the power was 120W, and the treatment time was 5min to obtain the activated base fabric.

[0075] (4) The activated base fabric is powdered using a powder spreader. Four portions of nanoparticles are spread onto the surface of the activated base fabric via a vibrating screen. The activated base fabric with nanoparticles on its surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles include modified nano-silica and an antibacterial core shell, with a mass ratio of 1:4. The preparation method of the modified nano-silica includes: activating the nano-silica in a 120°C drying oven for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane to the nano-silica mixture. The reaction is carried out at 75°C for 10 hours, followed by cooling and centrifugation. After washing and drying, modified nano-silica is obtained. The preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, and continuing the reaction at 80°C for 5 hours. After post-treatment, the modified nano-silica is obtained. The mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2.

[0076] (5) Mix 100 parts of acrylic resin, 10 parts of viscose fiber, 20 parts of long-staple cotton and 8 parts of antibacterial agent, melt extrude, spin and lay web to obtain a conventional absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0077] (6) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0078] (7) Weight is 25g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 18 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a weight of 20g / m². 2 Soft nonwoven fabric;

[0079] (8) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0080] Comparative Example 1

[0081] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0082] The manufacturing process of this nursing pad includes at least the following steps:

[0083] (1) Mix 8 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0084] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0085] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 60MPa, the temperature was 50℃, the gas flow rate was 290sccm, the power was 200W, and the treatment time was 12min to obtain the activated base fabric.

[0086] (4) The activated base fabric is powdered using a powder spreader. The powder spreader sprinkles 5 parts of nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on the surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles include modified nano-silica and antibacterial core shell, with a mass ratio of 1:5. The preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane from the nano-silica. The reaction is carried out at 75°C for 10 hours, followed by cooling, centrifugation, and washing. After washing and drying, modified nano-silica is obtained; the preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7.8, adding hexadecyltrimethylammonium bromide, reacting at 80℃ for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80℃ for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2;

[0087] (5) 100 parts acrylic resin, 15 parts viscose fiber, 15 parts long-staple cotton and 3 parts antibacterial agent are mixed, melt-extruded, spun and web-laid to obtain an absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0088] (6) Weight is 28g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 25 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 28g / m².2 Soft nonwoven fabric;

[0089] (7) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0090] Comparative Example 2

[0091] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0092] The manufacturing process of this nursing pad includes at least the following steps:

[0093] (1) Mix 8 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0094] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0095] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 60MPa, the temperature was 50℃, the gas flow rate was 290sccm, the power was 200W, and the treatment time was 12min to obtain the activated base fabric.

[0096] (4) 100 parts acrylic resin, 15 parts viscose fiber, 15 parts long-staple cotton, and 3 parts antibacterial agent are mixed, melt-extruded, spun, and web-laid to obtain a conventional absorbent layer. The preparation method of the antibacterial agent includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7.8, adding hexadecyltrimethylammonium bromide, reacting at 80°C for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80°C for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2;

[0097] (5) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0098] (6) Weight is 28g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 25 g / m2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 28g / m². 2 Soft nonwoven fabric;

[0099] (7) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0100] Comparative Example 3

[0101] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0102] The manufacturing process of this nursing pad includes at least the following steps:

[0103] (1) Mix 8 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0104] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0105] (3) The base fabric is powdered using a powder spreader. The powder spreader sprinkles 5 parts of nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on the surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles include modified nano-silica and antibacterial core shell, with a mass ratio of 1:5. The preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, adding 15% (by mass) of γ-aminopropyltriethoxysilane from the nano-silica, reacting at 75°C for 10 hours, and then cooling, centrifuging, and washing. After drying, modified nano-silica is obtained; the preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7.8, adding hexadecyltrimethylammonium bromide, reacting at 80℃ for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80℃ for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2;

[0106] (4) Mix 100 parts of acrylic resin, 15 parts of viscose fiber, 15 parts of long-staple cotton and 3 parts of antibacterial agent, melt extrude, spin and lay web to obtain a conventional absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0107] (5) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0108] (6) Weight is 28g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 25 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 28g / m². 2 Soft nonwoven fabric;

[0109] (7) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0110] Comparative Example 4

[0111] An antibacterial nursing pad, the manufacturing process of which includes the following steps:

[0112] The manufacturing process of this nursing pad includes at least the following steps:

[0113] (1) Mix 8 parts of antibacterial powder and 6 parts of polyethylene, extrude and granulate to obtain antibacterial masterbatch;

[0114] (2) The antibacterial masterbatch obtained in step S1 is mixed with 94 parts of polyethylene to obtain uniformly mixed particles, and the obtained particles are melt extruded, spun and laid into a web to obtain a base fabric.

[0115] (3) The base fabric was surface activated by oxygen plasma. The vacuum degree was 60MPa, the temperature was 50℃, the gas flow rate was 290sccm, the power was 200W, and the treatment time was 12min to obtain the activated base fabric.

[0116] (4) The activated base fabric is powdered using a powder spreader. The powder spreader sprinkles 5 parts of nanoparticles onto the surface of the activated base fabric through a vibrating screen. The activated base fabric with nanoparticles on the surface is then treated with a far-infrared radiator and needle-punched to obtain an antibacterial layer. The nanoparticles include modified nano-silica and antibacterial core shell, with a mass ratio of 1:5. The preparation method of modified nano-silica includes: activating nano-silica in a drying oven at 120°C for 3 hours, adding it to toluene, stirring, and then adding 15% (by mass) of γ-aminopropyltriethoxysilane from the nano-silica. The reaction is carried out at 75°C for 10 hours, followed by cooling, centrifugation, and washing. After washing and drying, modified nano-silica is obtained; the preparation method of the antibacterial core shell includes: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate, and magnesium nitrate in water, adjusting the pH to 7.8, adding hexadecyltrimethylammonium bromide, reacting at 80℃ for 6 hours, then adding γ-aminopropyltriethoxysilane and carboxymethyl chitosan to the water, continuing the reaction at 80℃ for 5 hours, and obtaining the product after post-treatment; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, hexadecyltrimethylammonium bromide, γ-aminopropyltriethoxysilane, and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2;

[0117] (5) Mix 100 parts of acrylic resin, 15 parts of viscose fiber, and 15 parts of long-staple cotton, melt extrude, spin, and lay web to obtain a conventional absorbent layer. The antibacterial agent and the antibacterial core shell have the same composition and preparation method.

[0118] (6) The conventional absorbent layer is drilled with a laser drill to obtain an opening that penetrates the absorbent layer. The support layer, resin layer, breathable layer, resin layer and support layer are combined and hot-pressed to obtain a three-dimensional permeable material. The three-dimensional permeable material is spirally arranged to obtain a flow area and is bonded to the opening to obtain the improved absorbent layer. A conventional absorbent layer is hot-pressed on one side of the improved absorbent layer to obtain the absorbent layer.

[0119] (7) Weight is 28g / m 2 The surface of the chitosan fiber nonwoven fabric is laser-perforated to create a perforation density of 130 perforations / cm². 2 Micropores with a diameter of 40 μm and a basis weight of 25 g / m 2 The breathable layer is obtained by hot pressing of a PE polymer breathable membrane; the comfort layer has a basis weight of 28g / m². 2 Soft nonwoven fabric;

[0120] (8) The breathable layer, absorbent layer, antibacterial layer and comfort layer are combined in sequence and then hot-pressed to obtain the final product.

[0121] The nursing pads prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to antibacterial tests according to GB / T20944.2-2007. The specific data are shown in Table 1.

[0122] Table 1. Results of Antibacterial Performance Tests for Nursing Pads

[0123]

[0124] Meanwhile, the antibacterial properties of the nursing pads from Example 1 and Comparative Example 3 were tested after being placed at 35±2℃ and 65±5% relative humidity for 6 months. The nursing pad from Example 1 showed an antibacterial rate of 97-98% against Escherichia coli, Staphylococcus aureus, and Candida albicans, while the nursing pad from Comparative Example 3 showed an antibacterial rate of 75-80.5% against Escherichia coli, Staphylococcus aureus, and Candida albicans.

[0125] In addition, the absorbency test was conducted on the nursing pad prepared in Example 1, with a commercially available nursing pad used as Comparative Example 5. The test liquid was a 1.0 wt% sodium chloride aqueous solution. The nursing pad was placed on a test bench, and 6 ml of the test liquid was dripped from 0.5 cm at the front end of the nursing pad. The time it took for the test liquid to be completely absorbed by the nursing pad was recorded to calculate the absorbency rate. Next, absorbent paper was placed on the nursing pad, and a 10 kg weight was pressed onto the surface of the nursing pad. The change in the weight of the absorbent paper was recorded to calculate the backflow rate. Specific data are shown in Table 2. The air permeability was also tested using 100°C steam.

[0126] Table 2 Performance Test Results

[0127] <![CDATA[Liquid absorption rate / ml·s -1 > Reverse osmosis <![CDATA[Air permeability / g·m -2 ·h -1 > Example 1 3.2 0.49 182 Comparative Example 5 1.8 1.32 119

[0128] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An antimicrobial medical care pad, characterized by: The nursing pad comprises, from top to bottom, a comfort layer, an antibacterial layer, a water absorption layer and a breathable layer, wherein the antibacterial layer comprises, by weight, polyethylene 100 parts, antibacterial powder 3-8 parts and nano particles 2-5 parts, the antibacterial powder has a structural formula as shown in formula 1, The water absorption layer comprises, by weight, acrylic resin 100 parts, viscose fiber 10-15 parts, long-cotton 15-20 parts and antibacterial agent 3-8 parts; The nano particles comprise modified nano silicon dioxide and bacteriostatic core-shell bodies, and the mass ratio of the two is 1:(2-5); The preparation method of the modified nano silicon dioxide comprises the following steps: activating nano silicon dioxide in a drying box at 120 DEG C for 3 hours, adding the nano silicon dioxide into toluene, stirring, adding 15% (mass fraction) of gamma-aminopropyl triethoxysilane, reacting at 75 DEG C for 10 hours, and then cooling, centrifuging, washing, drying to obtain the modified nano silicon dioxide; The preparation method of the bacteriostatic core-shell body comprises the following steps: dissolving cerium nitrate, lanthanum nitrate, sodium tungstate and magnesium nitrate in water, adjusting the pH to 7-8, adding cetyltrimethylammonium bromide, reacting at 80 DEG C for 6 hours, then adding gamma-aminopropyl triethoxysilane and carboxymethyl chitosan into the water, continuing to react at 80 DEG C for 5 hours, and then post-treating to obtain the bacteriostatic core-shell body; the mass ratio of cerium nitrate, lanthanum nitrate, sodium tungstate, magnesium nitrate, cetyltrimethylammonium bromide, gamma-aminopropyl triethoxysilane and carboxymethyl chitosan is 1:0.3:10:0.4:0.8:0.1:2; The antibacterial agent component and the preparation method are the same as those of the bacteriostatic core-shell body; The breathable layer is composed of chitosan fiber non-woven fabric and PE high-molecular breathable film; and the comfort layer is made of soft non-woven fabric.

2. An antimicrobial medical care pad according to claim 1, characterized in that: The water absorption layer is provided with flow-through grooves at intervals, the openings of the flow-through grooves are close to the breathable layer, flow-through areas are bonded in the flow-through grooves, the flow-through areas are spirally arranged from inside to outside along the central axis of the flow-through grooves, the flow-through areas comprise, from inside to outside, support layers, resin layers, breathable layers, resin layers and support layers, the outer sidewalls of the two support layers are further fixedly connected with protrusions arranged at intervals, the protrusions are made of water-absorbing pulp, and the breathable layers are hard materials arranged in V-shaped form.

3. A process for producing an anti-microbial medical care pad according to claim 2, characterized in that: The production process of the nursing pad comprises at least the following steps: S1: mixing antibacterial powder and 6% (by weight) of polyethylene in raw materials, extruding and granulating to obtain antibacterial masterbatch; S2: mixing the antibacterial masterbatch with the remaining polyethylene and obtaining uniformly mixed particles, and then melt-extruding, spinning, and laying the particles to obtain base cloth; S3: performing surface activation treatment on the base cloth by using oxygen plasma to obtain activated base cloth; S4: passing the activated base cloth through a powder sower, the powder sower sprays nano particles on the surface of the activated base cloth through a vibrating screen, and then the activated base cloth with nano particles on the surface is treated by a far-infrared radiator and needle punching to obtain the antibacterial layer; S5: mixing acrylic resin, viscose fiber, long-cotton, and antibacterial agent, melt-extruding, spinning, and laying the mixture to obtain a conventional water absorption layer. S6: The air-permeable layer, the water-absorbing layer, the antibacterial layer and the comfort layer are combined in sequence, and hot-pressing is performed to obtain the product.

4. A process for producing an anti-microbial medical care pad according to claim 3, characterized in that: The step S5 is performed to obtain the water-absorbing layer of the improved version. The water-absorbing layer of the improved version is obtained by punching the water-absorbing layer of the conventional version with a punch to form an opening penetrating the water-absorbing layer, combining the support layer, the resin layer, the air-permeable layer, the resin layer and the support layer, and performing hot-pressing to obtain a three-dimensional permeable material. The three-dimensional permeable material is arranged in a spiral manner to form a flow-through region and is bonded in the opening to obtain the water-absorbing layer of the improved version.

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