Preparation method and application of health type explosive bead sanitary napkin core

Abstract

The application discloses a preparation method of a health type explosive bead sanitary napkin core body, and belongs to the technical field of sanitary products and functional materials, and comprises the following steps: (1) preparing explosive beads, (2) first hot air non-woven fabric layer treatment, (3) second hot air non-woven fabric layer treatment, and (4) core body preparation. Through innovative glue skin material compounding, a multiple synergistic antibacterial system, a prebiotic microecological regulation mechanism and a hierarchical solidification preparation process, the product realizes multiple functions of 'pressure initial explosion-gradient release-long-acting bacteriostasis', and the storage stability and use safety of the product are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the technical field of hygiene products and functional materials, specifically relating to a method for preparing and applying a health-promoting bouncy sanitary napkin core. Background Technology

[0002] Bursting beads are spherical products with a gel-like outer layer and a liquid interior. As a novel product, bursting beads have expanded from the tobacco and food industries to personal care products. Existing technologies, such as CN120203936A, disclose a functional bursting bead sanitary napkin core. By bonding bursting beads containing sodium alginate-gelatin gel and a compound antibacterial agent liquid between non-woven fabric layers, basic functions such as nourishment, antibacterial properties, and odor removal are achieved. However, existing technologies still have the following shortcomings:

[0003] Poor mechanical properties and release controllability of the adhesive: The adhesive mainly relies on a simple compound of sodium alginate and gelatin, and its toughness and brittleness are difficult to balance. This causes the capsules to break prematurely (too brittle) during storage, transportation or sanitary napkin production, or to be difficult to break during use (too tough), affecting user experience and the immediacy of efficacy release.

[0004] The antibacterial system is relatively simple and lacks broad-spectrum efficacy: its compound antibacterial agent is only antimicrobial peptide and matrine (ratio 1:2.5), which has limited inhibitory effect on some common skin pathogens (such as Candida albicans), and long-term use may lead to adaptation.

[0005] The stability and efficacy synergy of the encapsulation system need to be improved: Although the emulsifier system achieves water / oil dual solubility, its ability to encapsulate and protect high-value active ingredients (such as prebiotics and ceramides) in the long term is weak; the preservative is only Artemisia scoparia extract, and its broad-spectrum preservative ability is insufficient in challenging tests.

[0006] Lack of functional gradient: The burst beads release all ingredients at once after rupture, lacking continuous and phased efficacy output, and cannot meet the long-term care needs of women during the few hours of menstruation.

[0007] Therefore, developing a novel bursting bead sanitary napkin core that combines good mechanical stability, controllable sustained release, broad-spectrum and highly effective antibacterial properties, and the ability to regulate the microecological balance has significant market value and application prospects. Summary of the Invention

[0008] To achieve the above objectives, this application provides a method for preparing the core of a health-care type bouncy sanitary napkin, comprising the following steps:

[0009] (1) Preparation of popping beads:

[0010] a. Preparation of composite rubber solution and functional liquid;

[0011] b. Using concentric droplet technology, the functional liquid is dropped into the composite rubber liquid, and after solidification, washing, drying and sieving, popping beads with uniform particle size are obtained;

[0012] (2) Treatment of the first hot air nonwoven fabric layer:

[0013] Spray the core hot melt adhesive onto the surface of the first hot air nonwoven fabric layer, controlling the amount of adhesive applied to be 4-6 g / m².

[0014] (3) Treatment of the second hot air nonwoven fabric layer:

[0015] Spray the core hot melt adhesive onto the surface of the second hot air nonwoven fabric layer, control the amount of adhesive to be 6-8 g / m², and then use a pelletizer to evenly spread the bursting beads obtained in step (1) onto the second hot air nonwoven fabric layer.

[0016] (4) Core preparation:

[0017] The first hot air nonwoven fabric layer processed in step (2) is covered over the second hot air nonwoven fabric layer and the burst beads obtained in step (3), and then hot-pressed to form a core. The core is then cut to obtain the finished product.

[0018] Furthermore, the composite rubber liquid described in step (1) operation a includes the following components in corresponding weight parts: 65-80 parts water, 5-10 parts composite rubber powder, 12-20 parts moisturizer, 2-4 parts polyethylene glycol sorbitol monolaurate, and 0.5-1.5 parts plant-derived composite antibacterial agent.

[0019] Furthermore, the composite rubber powder is composed of sodium alginate, gelatin and carrageenan in a weight ratio of 1-2:4-6:1-2.

[0020] Furthermore, the plant-derived compound antibacterial agent is a mixture of tea tree oil extract and chitosan quaternary ammonium salt in a weight ratio of 1:1-2.

[0021] Furthermore, the efficacy liquid described in step (1) operation a includes the following components in corresponding weight parts: 25-45 parts water, 18-28 parts natural plant oil, 3-6 parts nutrient complex, 2-4 parts double emulsifier, 1.5-3.5 parts ternary compound antibacterial agent, 3-6 parts thickener, 1-2 parts solidifying agent, 2.5-4 parts plant compound preservative, and 3-8 parts fragrance;

[0022] Furthermore, the nutrient complex comprises panthenol, ceramide, fructooligosaccharides, and sodium hyaluronate in a weight ratio of 2:1:2:1; the dual emulsifier is composed of polyglycerol ester and hydrogenated lecithin in a weight ratio of 1:1-1.5, with an HLB value of 11.0-12.0.

[0023] Furthermore, the ternary compound antibacterial agent is composed of antimicrobial peptides, matrine extract and berberine in a weight ratio of 1:2:0.5-1; the plant compound preservative is a mixture of Artemisia annua extract and rosemary extract in a weight ratio of 2:1.

[0024] Furthermore, the amount of burst beads sprinkled in step (3) is 18-22 g / m².

[0025] Furthermore, the temperature during hot pressing in step (4) is 50-70°C and the pressure is 0.6-0.8 MPa.

[0026] Application of a health-promoting bouncy sanitary napkin core, wherein the core is made by any of the above methods and is used in health-promoting feminine hygiene products.

[0027] The present invention has the following advantages over the prior art:

[0028] The sanitary napkin core of this invention has excellent mechanical properties and storage stability: it adopts a ternary composite rubber (sodium alginate / gelatin / carrageenan), which increases the burst strength of the burst beads by more than 30%, and reduces the leakage rate of the liquid after 3 months of accelerated aging at 50°C by more than 50%.

[0029] It has broad-spectrum, high-efficiency and synergistic antibacterial ability: the ternary compound antibacterial agent (antimicrobial peptide / matrine / berberine) has inhibition zone diameters of 18.5 mm and 16.2 mm against clinically isolated drug-resistant Staphylococcus aureus (MRSA) and Candida albicans, respectively, and the minimum inhibitory concentration (MIC) is significantly lower than that of each single agent, showing obvious synergistic effect.

[0030] It can actively regulate the balance of the microecology: The oligofructose (prebiotic) added to the solution has been proven by in vitro co-culture experiments to increase the relative abundance of lactobacillus from 40% to more than 75%, while inhibiting the growth of conditionally pathogenic bacteria, thus achieving an upgraded care from "sterilization" to "bacterial cultivation".

[0031] It can also achieve multiple effects and gradient release: Due to the three-dimensional network of the rubber, after the burst bead is initially broken by pressure, some of the small molecule active substances (such as prebiotics and oligofructose) bound in the rubber matrix can still be continuously released with body fluids for 4-6 hours, realizing a step-by-step care experience of "instant fragrance / cooling + mid-term antibacterial and anti-inflammatory + long-term regulation of flora".

[0032] Higher safety in use: The entire line uses plant-derived or bio-based preservative and antibacterial systems, without chemical preservatives (such as parabens) and irritating guanidine compounds. The in vitro red blood cell hemolysis test (RBC test) confirms that the irritation level is 0 (non-irritating). Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of the embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] In the embodiments, it should be noted that any processes not specifically described below are those that can be implemented or understood by those skilled in the art by referring to existing technology. Reagents or instruments whose manufacturers are not specified are considered to be conventional products that can be purchased commercially, specifically:

[0035] Sodium alginate, gelatin, carrageenan: food grade / cosmetic grade; tea tree oil extract, chitosan quaternary ammonium salt, berberine are all commercially available; matrine extract (matrine ≥98%), antimicrobial peptide (ε-polylysine), Artemisia annua extract, rosemary extract are all commercially available; fructooligosaccharides (prebiotics), hydrogenated lecithin, polyglycerol esters are all commercially available.

[0036] Example 1

[0037] A method for preparing the core of a health-care type bouncy sanitary napkin includes the following steps:

[0038] (1) Preparation of composite rubber liquid:

[0039] According to the formula in Table 1, purified water, composite rubber powder (sodium alginate:gelatin:carrageenan = 1.5:5:1.5), glycerol, and Tween-20 were mixed and heated to 70°C to dissolve evenly. After cooling to 45°C, tea tree oil / chitosan quaternary ammonium salt composite antibacterial agent was added, stirred evenly, and filtered to obtain the rubber solution. This solution is designated as G-1.

[0040] (2) Preparation of the efficacy-enhancing solution:

[0041] According to the formula in Table 1, water, double emulsifier (polyglycerol ester: hydrogenated lecithin = 1:1.2), and thickener (xanthan gum) were mixed and heated to 75°C to dissolve. Separately, vegetable oil, nutrient complex (panthenol: ceramide: fructooligosaccharide: sodium hyaluronate = 2:1:2:1), and solidifying agent were mixed and heated to dissolve. The two mixtures were then homogenized. After cooling to 45°C, a ternary composite antibacterial agent (antimicrobial peptide: matrine: berberine = 1:2:0.8), a plant-based composite preservative (Artemisia selengensis: rosemary = 2:1), and fragrance were added, and the mixture was stirred until homogeneous. The resulting solution, designated C-1, had a pH of 4.8 and a viscosity of 320 mPa·s (20°C).

[0042] Table 1

[0043] Components Rubber Liquid G-1 Encapsulation fluid C - 1 Purified water 75.00 35.00 Composite rubber powder 8.00 - Glycerol 15.00 - Twain - 20 3.00 - Plant-derived compound antibacterial agent 1.00 - dual emulsifier - 3.00 vegetable oil - 22.00 Nutrient complex - 5.00 Ternary compound antibacterial agent - 2.50 Xanthan Gum - 4.00 Calcium lactate - 1.50 Plant-based compound preservative - 3.00 essence - 5.00

[0044] (3) Preparation of popping beads:

[0045] Using a pelletizing machine, coating solution C-1 was dripped into rubber solution G-1. The pellets were then graded and cured as follows: first, they were cured in a 1.5% calcium lactate solution for 25 minutes, then removed and washed; next, they were cured a second time in a 0.8% chitosan solution for 12 minutes; after washing and draining, they were dried in hot air at 40℃ and sieved to obtain bursting beads with an average particle size of 2.0 mm, labeled B-1.

[0046] (4) Preparation of the sanitary napkin core: The core is prepared according to the following steps:

[0047] S1: The first layer of hot air nonwoven fabric (35g / m²) is sprayed with hot melt adhesive (5g / m²) at 170℃ by the first spraying machine.

[0048] S2: The second layer of hot air nonwoven fabric (35g / m²) is sprayed with hot melt adhesive (7g / m²) at 170℃ by the second spraying machine, and then the burst beads B-1 (20g / m²) are evenly spread by the pellet spreader.

[0049] S3: The first layer is placed on top of the second layer and hot-pressed at 60℃ and 0.7 MPa;

[0050] S4: Cut into 60mm wide sections to obtain the finished core.

[0051] To compare the effects of this invention, mechanical stability and aging tests of the popping beads were conducted. The test method was as follows:

[0052] Bursting strength: The peak pressure of a single bursting bead was tested using a texture analyzer (probe diameter 2mm, pressing speed 1mm / s, distance 1mm), with 20 beads tested in each group and the average value taken.

[0053] Encapsulation leakage rate: Place the capsules in a 50℃ constant temperature chamber for accelerated aging for 90 days (equivalent to 24 months at room temperature), and weigh the encapsulation leakage rate before and after aging.

[0054] The specific results are shown in Table 2 below:

[0055] Table 2

[0056] Sample source Rubber system Curing process Mean breaking strength (N) Leakage rate (%) at 50℃ / 90 days Prior art (CN120203936A Best Example) Sodium alginate: gelatin = 1:3 Single Ca 2+ Solidification 0.85 7.2% Embodiment 3 (B-1) of the present invention A ternary compound formula (1.5:5:1.5) <![CDATA[Step curing (Ca 2+ + chitosan)]]> 1.22 2.5% Comparative Example 1 Same as B-1 rubber <![CDATA[Single Ca 2+ solidification]]> 1.08 4.8% Comparative Example 2 Sodium alginate:gelatin:carrageenan = 1:2:1 Graded curing 0.93 5.5%

[0057] Except for the processes listed, Comparative Examples 1 and 2 are identical to Example 1.

[0058] It is evident that the B-1 bursting beads of this invention exhibit the highest bursting strength (1.22N), making them less prone to breakage during production and transportation while ensuring easy bursting by the user. Simultaneously, they demonstrate the lowest leakage rate (2.5%), proving that the ternary rubber and the graded curing process produce a significant synergistic anti-leakage effect.

[0059] Further in vitro antibacterial experiments were conducted on the compound antibacterial agent:

[0060] The antibacterial rate against common skin pathogens was tested using the shaking flask method, according to GB / T 20944.3-2008 standard. The specific results are shown in Table 3 below:

[0061] Table 3

[0062] sample Antibacterial agent system Staphylococcus aureus inhibition rate Escherichia coli inhibition rate Candida albicans inhibition rate Prior art (CN120203936A Best Example) Antimicrobial peptide: matrine = 1:2.5 90.7% 88.3% 76.5% Embodiment 2 (C-1) of the present invention Antimicrobial peptide: matrine: berberine = 1:2:0.8 99.9% 99.5% 99.2% Comparative Example 3 Antimicrobial peptide: matrine: berberine = 1:1:1 96.2% 94.8% 92.1% Comparative Example 4 Antimicrobial peptides only + berberine (no matrine) 91.5% 87.9% 85.3%

[0063] Except for the processes listed, Comparative Examples 3 and 4 are the same as Example 1.

[0064] It is evident that the ternary compound antibacterial agent C-1 of this invention exhibits an inhibition rate exceeding 99% against all three major pathogenic bacteria. In particular, the inhibition rate against Candida albicans increased from 76.5% to 99.2%, an increase of 22.7 percentage points, demonstrating an unexpected synergistic effect. However, altering the proportions or omitting matrine significantly reduces the efficacy.

[0065] This invention successfully developed a health-promoting sanitary napkin core with excellent mechanical properties, stable storage, broad-spectrum and highly effective antibacterial properties, and multiple sustained-release capabilities through innovative ternary rubber material, a multi-component synergistic antibacterial-prebiotic-dual emulsification liquid system, and a graded curing preparation process.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A method for preparing a health-promoting bouncy sanitary napkin core, characterized in that, Includes the following steps: (1) Preparation of popping beads: a. Preparation of composite rubber solution and functional liquid; b. Using concentric droplet technology, the functional liquid is dropped into the composite rubber liquid, and after solidification, washing, drying and sieving, popping beads with uniform particle size are obtained; (2) Treatment of the first hot air nonwoven fabric layer: Spray the core hot melt adhesive onto the surface of the first hot air nonwoven fabric layer, controlling the amount of adhesive applied to be 4-6 g / m². (3) Treatment of the second hot air nonwoven fabric layer: Spray the core hot melt adhesive onto the surface of the second hot air nonwoven fabric layer, control the amount of adhesive to be 6-8 g / m², and then use a pelletizer to evenly spread the bursting beads obtained in step (1) onto the second hot air nonwoven fabric layer. (4) Core preparation: The first hot air nonwoven fabric layer processed in step (2) is covered over the second hot air nonwoven fabric layer and the burst beads obtained in step (3), and then hot-pressed to form a core. The core is then cut to obtain the finished product.

2. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 1, characterized in that, The composite rubber liquid described in step (1) operation a includes the following components in corresponding weight parts: 65-80 parts water, 5-10 parts composite rubber powder, 12-20 parts humectant, 2-4 parts polyethylene glycol sorbitol monolaurate, and 0.5-1.5 parts plant-derived composite antibacterial agent.

3. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 2, characterized in that, The composite rubber powder is made by compounding sodium alginate, gelatin and carrageenan in a weight ratio of 1-2:4-6:1-2.

4. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 2, characterized in that, The plant-derived compound antibacterial agent is a mixture of tea tree oil extract and chitosan quaternary ammonium salt in a weight ratio of 1:1-2.

5. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 1, characterized in that, The efficacy liquid described in step (1) operation a includes the following components in corresponding weight parts: 25-45 parts water, 18-28 parts natural plant oil, 3-6 parts nutrient complex, 2-4 parts double emulsifier, 1.5-3.5 parts ternary compound antibacterial agent, 3-6 parts thickener, 1-2 parts solidifying agent, 2.5-4 parts plant compound preservative, and 3-8 parts fragrance.

6. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 5, characterized in that, The nutrient complex comprises panthenol, ceramide, fructooligosaccharides, and sodium hyaluronate in a weight ratio of 2:1:2:1; the dual emulsifier is composed of polyglycerol ester and hydrogenated lecithin in a weight ratio of 1:1-1.5 and has an HLB value of 11.0-12.

0.

7. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 5, characterized in that, The ternary compound antibacterial agent is composed of antimicrobial peptides, matrine extract and berberine in a weight ratio of 1:2:0.5-1; the plant compound preservative is a mixture of Artemisia annua extract and rosemary extract in a weight ratio of 2:

1.

8. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 1, characterized in that, The amount of popping beads sprinkled in step (3) is 18-22 g / m².

9. The method for preparing a health-care type bursting bead sanitary napkin core according to claim 1, characterized in that, The temperature during hot pressing in step (4) is 50-70℃ and the pressure is 0.6-0.8 MPa.

10. The application of a health-promoting menthol-filled sanitary napkin core, characterized in that, The core is made by any one of the methods described in claims 1-9, and the core is used in feminine hygiene products with health benefits.