Preparation method of antibacterial and deodorant adult paper diaper

Abstract

The invention relates to the technical field of paper diapers, provides a preparation method of an antibacterial and deodorant adult paper diaper, and solves the problem of short antibacterial time of a paper diaper prepared by an existing adult paper diaper preparation method. The method comprises the following steps: a, preparing an antibacterial and deodorizing chip: a1, preparing zeolite powder; a2, performing surface modification treatment on the zeolite powder, and drying to obtain a modified zeolite carrier; a3, immersing the modified zeolite carrier into a lactic acid solution, dipping under a vacuum condition, and then drying at a low temperature to constant weight to obtain zeolite particles loaded with lactic acid; a4, the zeolite particles loaded with lactic acid and a fiber material form a sheet-shaped antibacterial deodorization chip through an air laying process, food-grade lactic acid is embedded into zeolite pore channels through a vacuum impregnation method, a stable slow-release system is formed, peculiar smell molecules such as ammonia and sulfide in urine are actively captured by means of the strong adsorbability of zeolite, meanwhile, lactic acid is slowly released to destroy bacterial biofilms, and the antibacterial deodorization effect is achieved. And a dual deodorization mechanism of adsorption decomposition and active bacteriostasis is realized.

Description

Technical Field

[0001] This invention relates to the field of diaper technology, specifically to a method for preparing antibacterial and deodorizing adult diapers. Background Technology

[0002] With the aging population, the market demand for adult incontinence care products has surged. Currently, most mainstream antibacterial diapers on the market achieve their antibacterial function by mixing antibacterial substances into the absorbent layer. For example, Chinese Patent Publication No. CN112245117A discloses a dry, antibacterial, and odor-removing adult diaper and its preparation method. The diaper, from top to bottom, includes a surface layer, an antibacterial and odor-removing filter core layer, an absorbent core layer, and a bottom film layer. The surface layer has embossed patterns. The antibacterial and odor-removing filter core layer is made of non-woven fabric wrapped with super absorbent resin, honeysuckle powder, and artemisia powder. The absorbent core layer consists of an absorbent layer and a wrapping layer. The absorbent layer includes a first absorbent layer and a second absorbent layer. The first absorbent layer is made of super absorbent resin... The first absorbent layer is a superabsorbent resin layer formed by superabsorbent resin, and the second absorbent layer is a mixed layer made of fluff pulp and superabsorbent resin. The superabsorbent resin contained in the first absorbent layer and the second absorbent layer accounts for 6-15% and 11-20% of the total mass of the absorbent layer, respectively. The fluff pulp contained in the second absorbent layer accounts for 65-75% of the total mass of the absorbent layer. The antibacterial and deodorizing filter core layer of this invention is made of non-woven fabric wrapped with superabsorbent resin, honeysuckle powder and artemisia powder. Since its antibacterial powder is mixed in the absorbent layer, its antibacterial effect will decrease rapidly after the first contact with urine. Its antibacterial time is much shorter than the wearing time of adult diapers. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention provides a method for preparing antibacterial and deodorizing adult diapers, which solves the problem that the antibacterial duration of diapers prepared by existing adult diaper preparation methods is short.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0005] A method for preparing antibacterial and deodorizing adult diapers includes the following steps:

[0006] a. Preparation of antibacterial and deodorizing chips:

[0007] a1. Carrier pretreatment: Natural zeolite is acid-washed, water-washed, and dried, and then ultra-finely pulverized and graded by sieving to obtain zeolite powder;

[0008] a2. Surface modification: The zeolite powder obtained in step a1 is surface modified using an organic solution of silane coupling agent and dried to obtain a modified zeolite carrier.

[0009] a3. Lactic acid loading: The modified zeolite carrier obtained in step a2 is immersed in a lactic acid solution with a concentration of 10-30% and impregnated under vacuum for 30-90 minutes. Then, it is dried at a low temperature of 40-60℃ to constant weight to obtain lactic acid loaded zeolite particles.

[0010] a4. Chip forming: The lactic acid-loaded zeolite particles obtained in step a3 are combined with fiber materials to form a sheet-like antibacterial and deodorizing chip through an airflow web forming process.

[0011] b. Integrated diaper system:

[0012] b1. Provides the liquid-permeable top layer, diversion layer, covering layer, absorbent core and liquid-impermeable bottom layer of the diaper;

[0013] b2. The antibacterial and deodorizing chip obtained in step a4 is laid in strip or dot matrix form between the flow guiding layer and the coating layer;

[0014] b3. Fix the laid-up chip to the current-conducting layer or coating layer by hot pressing or spraying adhesive;

[0015] b4. Wrap the absorbent core with the covering layer, and then sequentially laminate the liquid-permeable top layer and the liquid-impermeable bottom layer. After cutting, folding, and packaging, antibacterial and deodorizing adult diapers are obtained.

[0016] Furthermore, in step a1, the particle size of the zeolite powder is 50-200 μm.

[0017] Furthermore, in step a2, the organic solution is ethanol or isopropanol.

[0018] Furthermore, in step a3, the vacuum degree of the vacuum condition is -0.05MPa to -0.09MPa.

[0019] Furthermore, in step a4, the fiber material is one or more of polyester, polypropylene, or ES fiber.

[0020] Furthermore, in step a4, during chip molding, the lactic acid-loaded zeolite particles are mixed with superabsorbent polymer particles at a mass ratio of 0.2-1.

[0021] Furthermore, in step b2, the gram weight of the antibacterial and deodorizing chip is 10-50 gsm.

[0022] Furthermore, in step b3, the hot pressing is performed using ultrasonic hot pressing, with the hot pressing temperature controlled between 60-100℃.

[0023] Furthermore, in step a3, the lactic acid loading rate is achieved by controlling the lactic acid solution concentration and the vacuum impregnation time, ultimately making the lactic acid loading rate reach 20%-25% of the zeolite carrier mass.

[0024] Furthermore, the preparation process of the antibacterial and deodorizing chip and the diaper integration process are carried out independently on different production lines. The antibacterial and deodorizing chip is directly integrated into the diaper integration production line through a roll-to-roll unrolling method.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] This invention selects natural zeolite with a high specific surface area, and controls the particle size through ultra-fine grinding and gradation technology to improve the carrier-lactic acid binding efficiency. Lactic acid solution is loaded through pore size control and surface modification technology, and food-grade lactic acid is embedded into the zeolite channels using a vacuum impregnation method to form a stable slow-release system. The antibacterial and deodorizing chip is embedded between the diaper's distribution layer and wrapping layer and fixed by hot pressing to ensure that the function is activated immediately upon contact with urine. The strong adsorption of zeolite is used to actively capture odor molecules such as ammonia and sulfides in urine, while the slow-release lactic acid destroys bacterial biofilm, realizing a dual deodorization mechanism of "adsorption decomposition + active antibacterial". Detailed Implementation

[0027] The following will describe in detail the implementation of the present invention with reference to specific embodiments, so that the process of how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0028] Example 1: A method for preparing antibacterial and deodorizing adult diapers, comprising the following steps:

[0029] a. Preparation of antibacterial and deodorizing chips:

[0030] a1. Carrier pretreatment: Natural clinoptilolite with a purity greater than 98% was selected and first placed in a 1 mol / L dilute hydrochloric acid solution for stirring and acid washing for 2 hours to remove surface impurities. It was then repeatedly washed with deionized water until neutral and thoroughly dried in an oven at 105℃. The dried zeolite blocks were then fed into an ultrafine pulverizer for pulverization, followed by precise control of the powder particle size using an air classifier to collect zeolite powder with a particle size of 50-200 μm for later use.

[0031] a2. Surface modification: Prepare a 2% silane coupling agent ethanol solution, add the zeolite powder obtained in step a1 into the solution, and mechanically stir at room temperature for 45 minutes to allow the silane coupling agent to fully couple with the zeolite surface. After the reaction is complete, centrifuge to separate the solid material and dry it at 80°C to obtain the surface-modified zeolite carrier.

[0032] a3. Lactic acid loading: Prepare a 20% food-grade lactic acid aqueous solution. Completely immerse the modified zeolite carrier obtained in step a2 in the lactic acid solution, transfer it to a vacuum impregnation tank, close the tank, start the vacuum pump, and evacuate the tank to -0.05MPa to -0.09MPa. Maintain this condition for 60 minutes to ensure that the lactic acid solution fully enters the zeolite channels under negative pressure. After impregnation, release the vacuum, remove the material, spread it evenly on a tray, and dry it at a low temperature in a 50℃ circulating air drying oven until constant weight. The lactic acid loading rate reaches 22% of the zeolite carrier mass, thus obtaining lactic acid-loaded zeolite particles.

[0033] a4. Chip forming: The lactic acid-loaded zeolite particles obtained in step a3 are mixed with ES fibers (polyethylene / polypropylene composite fibers) at a mass ratio of 4:1. The mixture is spread into a uniform web using an air-flow web forming machine. The basis weight (gramm) of the web is 35 gsm. Then, a layer of PP spunbond nonwoven fabric with a basis weight of 15 gsm is laminated on both the top and bottom sides of the web. The web is then initially fixed by a light hot rolling process (temperature 90℃) to finally form a sheet-like antibacterial and deodorizing chip roll.

[0034] b. Integrated diaper system:

[0035] b1. Material preparation: Prepare the materials for each layer of the diaper: polyester hot air non-woven fabric surface layer, PP diversion layer, covering layer, absorbent core containing SAP, and PE breathable membrane bottom layer.

[0036] b2. The antibacterial and deodorizing chip roll obtained in step a4 is laid in three parallel strips (each strip is 3cm wide and 2cm apart) between the flow guide layer and the coating layer on the production line. The laying weight of the antibacterial and deodorizing chip is 30gsm.

[0037] b3. Use ultrasonic hot pressing equipment to fix the area with the chip, with an auxiliary hot pressing temperature of 60℃;

[0038] b4. Wrap the absorbent core with the covering layer, and then sequentially laminate the liquid-permeable top layer and the liquid-impermeable bottom layer. After cutting, folding, and packaging, antibacterial and deodorizing adult diapers are obtained.

[0039] In other preferred embodiments, the antibacterial and deodorizing chip roll obtained in step a4 is cut into sheet-like antibacterial and deodorizing chips of the same size, and then placed in a dot matrix pattern between the guide layer and the coating layer by negative pressure adsorption.

[0040] In other preferred embodiments, in step a2, a 2% isopropanol solution of silane coupling agent can be prepared to modify the surface of the zeolite powder.

[0041] In other preferred embodiments, step a4 may also involve mixing one or more of ES fibers, polyethylene or polypropylene composite fibers with lactic acid-loaded zeolite particles.

[0042] Example 2: A method for preparing antibacterial and deodorizing adult diapers, comprising the following steps:

[0043] a. Preparation of antibacterial and deodorizing chips:

[0044] a1. Carrier pretreatment: Natural clinoptilolite with a purity greater than 98% was selected and first placed in a 1 mol / L dilute hydrochloric acid solution for stirring and acid washing for 2 hours to remove surface impurities. It was then repeatedly washed with deionized water until neutral and thoroughly dried in an oven at 105℃. The dried zeolite blocks were then fed into an ultrafine pulverizer for pulverization, followed by precise control of the powder particle size using an air classifier to collect zeolite powder with a particle size of 50-200 μm for later use.

[0045] a2. Surface modification: Prepare a 2% silane coupling agent ethanol solution, add the zeolite powder obtained in step a1 into the solution, and mechanically stir at room temperature for 45 minutes to allow the silane coupling agent to fully couple with the zeolite surface. After the reaction is complete, centrifuge to separate the solid material and dry it at 80°C to obtain the surface-modified zeolite carrier.

[0046] a3. Lactic acid loading: Prepare a 10% food-grade lactic acid aqueous solution. Completely immerse the modified zeolite carrier obtained in step a2 in the lactic acid solution, transfer it to a vacuum impregnation tank, close the tank, start the vacuum pump, and evacuate the tank to -0.05MPa to -0.09MPa. Maintain this condition for 90 minutes to ensure that the lactic acid solution fully enters the zeolite channels under negative pressure. After impregnation, release the vacuum, remove the material, spread it evenly on a tray, and dry it at a low temperature in a 50℃ circulating air drying oven until constant weight. The lactic acid loading rate reaches 25% of the zeolite carrier mass, thus obtaining lactic acid-loaded zeolite particles.

[0047] a4. Chip forming: The lactic acid-loaded zeolite particles obtained in step a3 are mixed with ES fibers (polyethylene / polypropylene composite fibers) at a mass ratio of 4:1. The mixture is spread into a uniform web using an air-flow web forming machine. The basis weight (gramm) of the web is 35 gsm. Then, a layer of PP spunbond nonwoven fabric with a basis weight of 15 gsm is laminated on both the top and bottom sides of the web. The web is then initially fixed by a light hot rolling process (temperature 90℃) to finally form a sheet-like antibacterial and deodorizing chip roll.

[0048] b. Integrated diaper system:

[0049] b1. Material preparation: Prepare the materials for each layer of the diaper: polyester hot air non-woven fabric surface layer, PP diversion layer, covering layer, absorbent core containing SAP, and PE breathable membrane bottom layer.

[0050] b2. The antibacterial and deodorizing chip roll obtained in step a4 is laid in three parallel strips (each 3cm wide and 2cm apart) on the production line between the flow guide layer and the coating layer through a roll-to-roll unwinding device. The laying weight of the antibacterial and deodorizing chip is 10gsm.

[0051] b3. Use ultrasonic hot pressing equipment to fix the area with the chip, with an auxiliary hot pressing temperature of 80℃.

[0052] b4. Wrap the absorbent core with the covering layer, and then sequentially laminate the liquid-permeable top layer and the liquid-impermeable bottom layer. After cutting, folding, and packaging, antibacterial and deodorizing adult diapers are obtained.

[0053] In step a4, during chip molding, the lactic acid-loaded zeolite particles are mixed with superabsorbent polymer particles at a mass ratio of 0.2-1.

[0054] Example 3: A method for preparing antibacterial and deodorizing adult diapers, comprising the following steps:

[0055] a. Preparation of antibacterial and deodorizing chips:

[0056] a1. Carrier pretreatment: Natural clinoptilolite with a purity greater than 98% was selected and first placed in a 1 mol / L dilute hydrochloric acid solution for stirring and acid washing for 2 hours to remove surface impurities. It was then repeatedly washed with deionized water until neutral and thoroughly dried in an oven at 105℃. The dried zeolite blocks were then fed into an ultrafine pulverizer for pulverization, followed by precise control of the powder particle size using an air classifier to collect zeolite powder with a particle size of 50-200 μm for later use.

[0057] a2. Surface modification: Prepare a 2% silane coupling agent ethanol solution, add the zeolite powder obtained in step a1 into the solution, and mechanically stir at room temperature for 45 minutes to allow the silane coupling agent to fully couple with the zeolite surface. After the reaction is complete, centrifuge to separate the solid material and dry it at 80°C to obtain the surface-modified zeolite carrier.

[0058] a3. Lactic acid loading: Prepare a 30% food-grade lactic acid aqueous solution. Completely immerse the modified zeolite carrier obtained in step a2 in the lactic acid solution, transfer it to a vacuum impregnation tank, close the tank, start the vacuum pump, and evacuate the tank to -0.05MPa to -0.09MPa. Maintain this condition for 30 minutes to ensure that the lactic acid solution fully enters the zeolite channels under negative pressure. After impregnation, release the vacuum, remove the material, spread it evenly on a tray, and dry it at a low temperature in a 50℃ circulating air drying oven until constant weight. The lactic acid loading rate reaches 20% of the zeolite carrier mass, thus obtaining lactic acid-loaded zeolite particles.

[0059] a4. Chip forming: The lactic acid-loaded zeolite particles obtained in step a3 are mixed with ES fibers (polyethylene / polypropylene composite fibers) at a mass ratio of 4:1. The mixture is spread into a uniform web using an air-flow web forming machine. The basis weight (gramm) of the web is 35 gsm. Then, a layer of PP spunbond nonwoven fabric with a basis weight of 15 gsm is laminated on both the top and bottom sides of the web. The web is then initially fixed by a light hot rolling process (temperature 90℃) to finally form a sheet-like antibacterial and deodorizing chip roll.

[0060] b. Integrated diaper system:

[0061] b1. Material preparation: Prepare the materials for each layer of the diaper: polyester hot air non-woven fabric surface layer, PP diversion layer, covering layer, absorbent core containing SAP, and PE breathable membrane bottom layer.

[0062] b2. The antibacterial and deodorizing chip roll obtained in step a4 is laid in three parallel strips (each 3cm wide and 2cm apart) on the production line between the flow guide layer and the coating layer through a roll-to-roll unwinding device. The laying weight of the antibacterial and deodorizing chip is 50gsm.

[0063] b3. Use ultrasonic hot pressing equipment to fix the area with the chip, with an auxiliary hot pressing temperature of 100℃.

[0064] b4. Wrap the absorbent core with the covering layer, and then sequentially laminate the liquid-permeable top layer and the liquid-impermeable bottom layer. After cutting, folding, and packaging, antibacterial and deodorizing adult diapers are obtained.

[0065] Example 4: Unlike Example 1, in step a4, during chip molding, the lactic acid-loaded zeolite particles obtained in step a3 are first mixed with superabsorbent polymer particles at a mass ratio of 0.2-1, preferably 0.4-0.7. In this example, a mass ratio of 0.5 is used. Then, the mixed particles are mixed evenly with ES fibers (polyethylene / polypropylene composite fibers). The mass ratio of lactic acid-loaded zeolite particles to ES fibers (polyethylene / polypropylene composite fibers) remains 4:1.

[0066] Compared with Embodiment 1, the advantage of this embodiment is that it can maintain the diaper's instant absorption capacity without affecting the antibacterial and deodorizing chip.

[0067] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A method for preparing antibacterial and deodorizing adult diapers, characterized in that, Includes the following steps: a. Preparation of antibacterial and deodorizing chips: a1. Carrier pretreatment: Natural zeolite is acid-washed, water-washed, and dried, and then ultra-finely pulverized and graded by sieving to obtain zeolite powder; a2. Surface modification: The zeolite powder obtained in step a1 is surface modified using an organic solution of silane coupling agent and dried to obtain a modified zeolite carrier. a3. Lactic acid loading: The modified zeolite carrier obtained in step a2 is immersed in a lactic acid solution with a concentration of 10-30% and impregnated under vacuum for 30-90 minutes. Then, it is dried at a low temperature of 40-60℃ to constant weight to obtain lactic acid loaded zeolite particles. a4. Chip forming: The lactic acid-loaded zeolite particles obtained in step a3 are combined with fiber materials to form a sheet-like antibacterial and deodorizing chip through an airflow web forming process. b. Integrated diaper system: b1. Provides the liquid-permeable top layer, diversion layer, covering layer, absorbent core and liquid-impermeable bottom layer of the diaper; b2. The antibacterial and deodorizing chip obtained in step a4 is laid in strip or dot matrix form between the flow guiding layer and the coating layer; b3. Fix the laid-up chip to the current-conducting layer or coating layer by hot pressing or spraying adhesive; b4. Wrap the absorbent core with the covering layer, and then sequentially laminate the liquid-permeable top layer and the liquid-impermeable bottom layer. After cutting, folding, and packaging, antibacterial and deodorizing adult diapers are obtained.

2. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a1, the particle size of the zeolite powder is 50-200 μm.

3. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a2, the organic solution is ethanol or isopropanol.

4. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a3, the vacuum level of the vacuum condition is -0.05 MPa to -0.09 MPa.

5. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a4, the fiber material is one or more of polyester, polypropylene, or ES fiber.

6. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a4, during chip molding, the lactic acid-loaded zeolite particles are mixed with superabsorbent polymer particles at a mass ratio of 0.2-1.

7. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step b2, the gram weight of the antibacterial and deodorizing chip is 10-50 gsm.

8. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step b3, the hot pressing is performed using ultrasonic hot pressing, with the auxiliary hot pressing temperature controlled at 60-100℃.

9. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: In step a3, the lactic acid loading rate is achieved by controlling the concentration of the lactic acid solution and the vacuum impregnation time, ultimately making the lactic acid loading rate reach 20%-25% of the mass of the zeolite carrier.

10. The method for preparing an antibacterial and deodorizing adult diaper according to claim 1, characterized in that: The preparation process of the antibacterial and deodorizing chip and the diaper integration process are carried out independently on different production lines. The antibacterial and deodorizing chip is directly integrated into the diaper integration production line through a roll-to-roll unrolling method.