A sanitary napkin composite core containing a slow-release microcapsule and a sanitary napkin comprising the same

Abstract

The utility model provides a kind of sanitary towel composite chip containing slow-release microcapsule and the sanitary towel comprising it, it is related to the technical field of sanitary products.The sanitary towel composite chip includes by upper to lower sequentially layering arrangement: weak acid nonwoven surface layer, odor-removing layer, first water-absorbing fiber woven cloth layer, open-cell foam layer and second water-absorbing fiber woven cloth layer;And the open-cell foam layer is filled with slow-release microcapsule.The sanitary towel composite chip containing slow-release microcapsule meets the maintenance pH health balance, antibacterial, effective odor-removing, swift flow guide, strong ventilation, sustained release, swift dry and comfortable and protective etc.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, and in particular to a sanitary napkin composite chip containing sustained-release microcapsules and a sanitary napkin containing the same. Background Technology

[0002] The absorbent core of sanitary napkins generally has a layered structure, typically consisting of a lint-free paper layer, a super absorbent polymer material, and a fluffy non-woven fabric from bottom to top. The super absorbent polymer material is evenly distributed on the fluffy non-woven fabric. Sanitary napkins, as absorbent products that come into direct contact with sensitive areas of the female body, have the basic requirements of safety, effectiveness, and comfort. These requirements can be divided into the following three core dimensions: 1. Absorption and Leakage Prevention: Strong absorbency and fast absorption speed ensure rapid absorption of menstrual blood and a large total absorbency volume. Liquid can quickly penetrate the surface layer and be locked in by the inner absorbent layer; and after absorption, it can firmly lock the liquid inside to prevent backflow. 2. Safety and Health: Hypoallergenic; the fabric should be gentle and non-irritating to the skin, minimizing the risk of sensitization; it should also have good breathability to allow air circulation, avoiding a damp and stuffy environment in the private area, thereby reducing bacterial growth and odor, and lowering the risk of itching and infection. 3. Comfort: The surface material must be soft to the touch and will not damage delicate skin during friction. While ensuring absorbency, the product should be made as thin as possible to avoid creating a heavy, bulky feeling.

[0003] CN214387893U discloses a sanitary napkin with antibacterial and deodorizing properties, comprising a sanitary napkin body and side wings disposed on both sides of the sanitary napkin body. The sanitary napkin body includes a top layer, a composite chip layer, a water-locking layer, and a bottom layer. A linalool essential oil block is disposed between the top layer and the composite chip layer; the linalool essential oil block is a bursting linalool essential oil, a capsule linalool essential oil, or a linalool essential oil sustained-release tablet. This sanitary napkin relies entirely on the deodorizing effect of linalool essential oil, which mainly "masks" odor through its strong aroma. However, the essential oil is volatile, and the odor will reappear after the essential oil evaporates.

[0004] CN213552939U discloses a cooling sanitary napkin, including a main body and protective wings disposed on both sides of the main body. The main body includes a liquid-permeable surface layer, an absorbent core, and a liquid-impermeable bottom layer stacked from top to bottom. The absorbent core includes an upper covering layer, a lower covering layer, and a core material layer sandwiched between the two. Supporting base fabrics are disposed at both lateral ends of the core material layer, and each of the supporting base fabrics is provided with cooling microcapsule particles. Each supporting base fabric is located between the core material layer and the upper covering layer and embedded on the upper surface of the core material layer. In this sanitary napkin, the cooling microcapsule particles are directly disposed on the supporting base fabric. In the initial stage of use, the capsules will break instantly, bringing a strong but short-lived cooling sensation. However, even if sustained-release microcapsules are used, the effect will quickly diminish, and long-lasting sustained release cannot be achieved. In addition, the cooling microcapsules tend to concentrate on the supporting base fabrics at the "lateral ends", resulting in uneven distribution of the cooling sensation. The additional particles are also prone to falling off or shifting from the base fabric when squeezed or rubbed.

[0005] In view of the above, this utility model is hereby proposed. Utility Model Content

[0006] The purpose of this invention is to provide a sanitary napkin composite chip containing sustained-release microcapsules and a sanitary napkin containing the same. The sanitary napkin composite chip containing sustained-release microcapsules effectively solves the shortcomings of existing sanitary napkins, such as poor odor removal and difficulty in utilizing the functional microcapsule ingredients. It also offers advantages such as maintaining a healthy pH balance, antibacterial and bacteriostatic properties, effective odor removal, rapid absorption, strong breathability, continuous sustained release, quick drying, and overall comfort and protection.

[0007] In a first aspect, this utility model provides a sanitary napkin composite chip containing sustained-release microcapsules. The sanitary napkin composite chip includes, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer, an odor-removing layer, a first absorbent fiber woven fabric layer, an open-cell foam layer, and a second absorbent fiber woven fabric layer; and the open-cell foam layer is filled with sustained-release microcapsules.

[0008] Furthermore, the pH of the weakly acidic nonwoven fabric surface layer is 4 to 6.

[0009] Furthermore, the thickness of the weak acid nonwoven fabric surface layer is 0.3–1.0 mm.

[0010] Furthermore, the odor-removing layer includes a first coating layer and a second coating layer, as well as odor-removing powder coated between the first coating layer and the second coating layer.

[0011] Furthermore, the first covering layer and the second covering layer are each independently a nonwoven fabric layer and / or a meltblown fabric layer.

[0012] Furthermore, the thickness of the first coating layer and the second coating layer are each independently 0.3 to 1.0 mm.

[0013] Furthermore, the coating weight of the odor-removing powder is 15–25 mg / cm³. 2 .

[0014] Furthermore, the particle size of the odor-removing powder is 400–600 μm.

[0015] Furthermore, the first absorbent fiber woven fabric layer is woven from absorbent fibers.

[0016] Furthermore, the thickness of the first absorbent fiber woven fabric layer is 0.3 to 1.0 mm.

[0017] Furthermore, the fineness of the absorbent fiber is 1.5 to 5.0 dtex.

[0018] Furthermore, the warp density of the first absorbent fiber woven fabric layer is 20-80 threads / cm.

[0019] Furthermore, the weft density of the first absorbent fiber woven fabric layer is 20-80 threads / cm.

[0020] Furthermore, the interior of the open-cell foam layer has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer is filled with sustained-release microcapsules.

[0021] Furthermore, the thickness of the open-cell foam layer is 0.5–1.0 mm.

[0022] Furthermore, the pore size of the open-cell foam layer is 300–500 μm.

[0023] Furthermore, the porosity of the open-cell foam layer is 60-95%.

[0024] Furthermore, the sustained-release microcapsule comprises a core containing functional ingredients and a capsule wall covering the core.

[0025] Furthermore, the sustained-release microcapsules have a spherical structure.

[0026] Furthermore, the sustained-release microcapsules have a particle size of 200–450 μm.

[0027] Furthermore, the thickness of the capsule wall of the sustained-release microcapsule is 30–200 μm.

[0028] Furthermore, the second absorbent fiber woven fabric layer is woven from absorbent fibers.

[0029] Furthermore, the thickness of the second absorbent fiber woven fabric layer is 0.3 to 1.0 mm.

[0030] Furthermore, the fineness of the absorbent fiber is 1.5 to 5.0 dtex.

[0031] Furthermore, the warp density of the second absorbent fiber woven fabric layer is 20-80 threads / cm.

[0032] Furthermore, the weft density of the second absorbent fiber woven fabric layer is 20-80 threads / cm.

[0033] Secondly, this utility model provides a sanitary napkin, which includes a sanitary napkin composite chip containing sustained-release microcapsules as described in the first aspect.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] The sanitary napkin composite chip containing sustained-release microcapsules of this invention features a weakly acidic nonwoven fabric surface layer that directly contacts the skin, effectively maintaining the weakly acidic environment of the private area and reducing the risk of irritation and allergies. An independent odor-removing layer absorbs odor molecules at the source, rather than simply masking them, ensuring a fresh feeling throughout. The open-cell foam layer, as the technological core, with its three-dimensional interconnected honeycomb structure, not only provides excellent breathability, alleviating stuffiness and dampness, but also serves as a perfect carrier for the sustained-release microcapsules, more evenly holding them and preventing them from shifting or falling off, allowing for gradual release. The upper and lower double absorbent fiber woven fabric layers work together to achieve rapid water diversion and diffusion, significantly improving surface dryness. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 A schematic diagram of the structure of the sanitary napkin composite chip containing sustained-release microcapsules provided by this utility model;

[0038] Among them, 100 is a weak acid non-woven fabric surface layer, 200 is an odor removal layer, 300 is a first absorbent fiber woven fabric layer, 301 is a second absorbent fiber woven fabric layer, 400 is an open-cell foam layer, and 500 is a sustained-release microcapsule.

[0039] Figure 2 A schematic diagram of the structure of the odor-removing layer provided by this utility model;

[0040] Among them, 200 is the odor-removing layer, 201 is the first coating layer, 202 is the second coating layer, and 203 is the odor-removing powder. Detailed Implementation

[0041] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] Firstly, this utility model provides a sanitary napkin composite chip containing sustained-release microcapsules, such as... Figure 1 As shown, the sanitary napkin composite chip includes, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer 100, an odor-removing layer 200, a first absorbent fiber woven fabric layer 300, an open-cell foam layer 400, and a second absorbent fiber woven fabric layer 301; and the open-cell foam layer is filled with sustained-release microcapsules 500.

[0044] In this invention, the composite chip includes a weakly acidic non-woven fabric surface layer. The pH value of a healthy woman's private parts is typically weakly acidic (pH = 3.8–4.5). This weakly acidic surface layer helps maintain the natural acid-base balance of the local skin, avoiding irritation, itching, or allergies that may be caused by alkaline materials. It is especially suitable for sensitive skin and skin with decreased resistance during menstruation. The composite chip includes an odor-removing layer located beneath the surface layer. This layer actively captures and locks odor molecules at the source of the odor, addressing the problem at its root rather than simply masking it with fragrance.

[0045] In this invention, the composite chip includes a water-absorbing composite layer, which comprises a first water-absorbing fiber woven fabric layer, an open-cell foam layer, and a second water-absorbing fiber woven fabric layer. The woven fabric layer acts as a directional guide, rapidly diffusing liquid from the ingress point (usually the center) to the edges and ends of the chip, preventing liquid from concentrating at one point and being unabsorbed by the core, thus reducing the risk of backflow. The first layer of water-absorbing fiber woven fabric is responsible for quickly receiving and diffusing the liquid. The open-cell foam layer, with its three-dimensional interconnected open-cell structure, has strong water absorption and ensures ample airflow channels, quickly expelling moisture downwards and facilitating air exchange. The second layer of water-absorbing fiber woven fabric further absorbs the liquid, locking it firmly inside to prevent backflow. This design maximizes the capacity of the core and keeps the surface dry. Therefore, the water-absorbing composite layer keeps the skin surface dry and breathable, greatly alleviating the discomfort of stuffiness and humidity.

[0046] In this invention, the open-cell foam layer is filled with sustained-release microcapsules. The open-cell foam layer serves as a perfect carrier for these microcapsules, allowing the effective microcapsules to be evenly distributed throughout the entire layer. The network structure of the foam layer firmly locks the microcapsules in place, preventing displacement or inactivation and avoiding aggregation or localized point distribution under pressure and friction. Furthermore, the presence of sustained-release microcapsules in the open-cell foam layer ensures that the effective microcapsules do not rupture instantly, but are released layer by layer slowly, avoiding the problem of excessive initial efficacy followed by ineffectiveness.

[0047] As an optional implementation, the pH of the weakly acidic nonwoven fabric surface layer 100 is 4 to 6, for example, it can be 4, 4.5, 5, 5.5, 6, etc.

[0048] As an optional implementation, the thickness of the weak acid nonwoven fabric surface layer 100 is 0.3 to 1.0 mm, for example, it can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0049] As an optional implementation, the method for preparing the weak acid nonwoven fabric surface layer is as follows: the nonwoven fabric surface layer is coated with a weak acid solution by means of coating or spraying, and then dried to obtain the weak acid nonwoven fabric surface layer.

[0050] As an optional implementation, the weak acid solution is prepared by dissolving the weak acid raw material in water to obtain the weak acid solution.

[0051] As an optional implementation, the weak acid includes, but is not limited to, any one or a combination of at least two of citric acid, fruit acid, or lactic acid.

[0052] As an optional implementation method, such as Figure 2 As shown, the odor-removing layer 200 includes a first coating layer 201 and a second coating layer 202, as well as odor-removing powder 203 coated between the first coating layer 201 and the second coating layer 202.

[0053] As an optional implementation, the first covering layer is a non-woven fabric layer and / or a meltblown fabric layer.

[0054] As an optional implementation, the second covering layer is a non-woven fabric layer and / or a meltblown fabric layer.

[0055] As an optional implementation, the thickness of the first covering layer 201 is 0.3 to 1.0 mm, for example, it can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0056] As an optional implementation, the thickness of the second covering layer 202 is 0.3 to 1.0 mm, for example, it can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0057] As an optional implementation, the coating amount of the odor-removing powder is 15-25 mg / cm³. 2 For example, it could be 15 mg / cm³ 2 16mg / cm 2 17mg / cm 2 18mg / cm 2 19mg / cm 2 20mg / cm 2 21mg / cm 2 22mg / cm 2 23mg / cm 2 24mg / cm 2 25mg / cm 2 wait.

[0058] As an optional implementation, the particle size of the odor-removing powder is 400-600 μm, for example, it can be 400 μm, 450 μm, 500 μm, 550 μm, 600 μm, etc.

[0059] As an optional implementation, the odor-removing powder can be coated between the first and second coating layers in the following way: the odor-removing powder, the pharmaceutical carrier and the solvent are mixed and combined into a powder, which is then laminated between the two layers of non-woven fabric.

[0060] As an optional implementation, the odor-removing powder includes, but is not limited to, any one or a combination of at least two of activated carbon, bamboo charcoal, or natural zeolite.

[0061] As an optional implementation, the pharmaceutical carrier includes, but is not limited to, starch.

[0062] As an optional implementation, the solvent includes, but is not limited to, ethanol and / or deionized water.

[0063] As an optional implementation, the first absorbent fiber woven fabric layer 300 is woven from absorbent fibers.

[0064] As an optional implementation, the thickness of the first absorbent fiber woven fabric layer 300 is 0.3 to 1.0 mm, for example, it can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0065] As an optional implementation, the fineness of the absorbent fibers in the first absorbent fiber woven fabric layer 300 is 1.5 to 5.0 dtex, for example, it can be 1.5 dtex, 2.0 dtex, 2.5 dtex, 3.0 dtex, 3.5 dtex, 4.0 dtex, 4.5 dtex, 5.0 dtex, etc.

[0066] As an optional implementation, the warp density of the first absorbent fiber woven fabric layer 300 is 20 to 80 threads / cm, for example, it can be 20 threads / cm, 30 threads / cm, 40 threads / cm, 50 threads / cm, 60 threads / cm, 70 threads / cm, 80 threads / cm, etc.

[0067] As an optional implementation, the weft density of the first absorbent fiber woven fabric layer 300 is 20 to 80 threads / cm, for example, it can be 20 threads / cm, 30 threads / cm, 40 threads / cm, 50 threads / cm, 60 threads / cm, 70 threads / cm, 80 threads / cm, etc.

[0068] As an optional implementation, the absorbent fiber includes, but is not limited to, any one or a combination of at least two of hemp fiber, bamboo fiber, cotton fiber, or seaweed fiber.

[0069] As an optional implementation, the first absorbent fiber woven fabric layer 300 includes, but is not limited to, any one or a combination of at least two of hemp fiber woven fabric layers, bamboo fiber woven fabric layers, cotton fiber woven fabric layers, or seaweed fiber woven fabric layers.

[0070] As an optional implementation, the interior of the open-cell foam layer 400 has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer 400 is filled with sustained-release microcapsules 500.

[0071] As an optional implementation, the thickness of the open-cell foam layer 400 is 0.5 to 1.0 mm, for example, it can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0072] As an optional implementation, the pore size of the open-cell foam layer 400 is 300-500μm, for example, it can be 300μm, 320μm, 340μm, 360μm, 380μm, 400μm, 420μm, 440μm, 460μm, 480μm, 500μm, etc.

[0073] As an optional implementation, the porosity of the open-cell foam layer 400 is 60-95%, for example, it can be 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc.

[0074] As an optional implementation, the material of the open-cell foam layer 400 includes, but is not limited to, any one or a combination of at least two of polypropylene, polyethylene, polyurethane or polylactic acid.

[0075] As an optional implementation, the open-cell foam layer 400 includes, but is not limited to, any one or a combination of at least two of the following: polypropylene open-cell foam layer, polyethylene open-cell foam layer, polyurethane open-cell foam layer, or polylactic acid open-cell foam layer.

[0076] As an optional implementation, the open-cell foam layer 400 is prepared by supercritical CO2 foaming process.

[0077] As an optional implementation, the sustained-release microcapsule 500 includes a core containing an active ingredient and a capsule wall covering the core.

[0078] As an optional implementation, the sustained-release microcapsule 500 has a spherical structure.

[0079] As an optional implementation, the particle size of the sustained-release microcapsules 500 is 200-450 μm, for example, 200 μm, 250 μm, 300 μm, 350 μm, 400 μm, 450 μm, etc.

[0080] As an optional implementation, the thickness of the capsule wall of the sustained-release microcapsule 500 is 30-200 μm, for example, it can be 30 μm, 50 μm, 60 μm, 80 μm, 100 μm, 120 μm, 140 μm, 150 μm, 160 μm, 180 μm, 200 μm, etc.

[0081] As an optional implementation, the functional ingredients include, but are not limited to, any one or a combination of at least two of the following: ingredients with soothing and restorative effects, ingredients with cooling and refreshing effects, ingredients with antibacterial effects, or ingredients with nourishing effects.

[0082] As an optional implementation, the soothing and restorative active ingredients include, but are not limited to, any one or a combination of at least two of aloe vera, witch hazel, squalane, paeonol, olive leaf extract, or Anoectochilus roxburghii.

[0083] As an optional implementation, the active ingredient having cooling and refreshing properties includes, but is not limited to, any one or a combination of at least two of menthol, menthyl ester, or mentholamide.

[0084] As an optional implementation, the antibacterial active ingredients include, but are not limited to, any one or a combination of at least two of the following: purslane, tea polyphenols, nano-platinum, betel leaf, honeysuckle, polyhexamethylene monoguanidine, or polyhexamethylene biguanide.

[0085] As an optional implementation, the nourishing functional ingredients include, but are not limited to, any one or a combination of at least two of collagen, propolis extract, or hyaluronic acid.

[0086] As an optional implementation, the second absorbent fiber woven fabric layer is woven from absorbent fibers.

[0087] As an optional implementation, the thickness of the second absorbent fiber woven fabric layer 301 is 0.3 to 1.0 mm, for example, it can be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0088] As an optional implementation, the fineness of the absorbent fibers in the second absorbent fiber woven fabric layer 301 is 1.5 to 5.0 dtex, for example, it can be 1.5 dtex, 2.0 dtex, 2.5 dtex, 3.0 dtex, 3.5 dtex, 4.0 dtex, 4.5 dtex, 5.0 dtex, etc.

[0089] As an optional implementation, the warp density of the second absorbent fiber woven fabric layer 301 is 20 to 80 threads / cm, for example, it can be 20 threads / cm, 30 threads / cm, 40 threads / cm, 50 threads / cm, 60 threads / cm, 70 threads / cm, 80 threads / cm, etc.

[0090] As an optional implementation, the weft density of the second absorbent fiber woven fabric layer 301 is 20 to 80 threads / cm, for example, it can be 20 threads / cm, 30 threads / cm, 40 threads / cm, 50 threads / cm, 60 threads / cm, 70 threads / cm, 80 threads / cm, etc.

[0091] As an optional implementation, the absorbent fiber includes, but is not limited to, any one or a combination of at least two of hemp fiber, bamboo fiber, cotton fiber, or seaweed fiber.

[0092] As an optional implementation, the second absorbent fiber woven fabric layer 301 includes, but is not limited to, any one or a combination of at least two of hemp fiber woven fabric layers, bamboo fiber woven fabric layers, cotton fiber woven fabric layers, or seaweed fiber woven fabric layers.

[0093] Secondly, this utility model provides a sanitary napkin, which includes a sanitary napkin composite chip containing sustained-release microcapsules as described in the first aspect.

[0094] The present invention will be further illustrated by the following embodiments. Unless otherwise specified, the materials in the embodiments are prepared according to existing methods or purchased directly from the market.

[0095] Example 1

[0096] This embodiment provides a sanitary napkin composite chip containing sustained-release microcapsules, such as... Figure 1 As shown, the sanitary napkin composite chip comprises, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer 100, an odor-removing layer 200, a first absorbent fiber woven fabric layer 300, an open-cell foam layer 400, and a second absorbent fiber woven fabric layer 301; and the open-cell foam layer is filled with sustained-release microcapsules 500. Figure 2 As shown, the odor-removing layer 200 includes a first coating layer 201 and a second coating layer 202, as well as odor-removing powder 203 coated between the first coating layer 201 and the second coating layer 202.

[0097] The pH of the weak acid nonwoven fabric surface layer 100 is 4.5, and the thickness of the weak acid nonwoven fabric surface layer 100 is 0.34 mm.

[0098] Wherein, the first coating layer 201 is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer 202 is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is activated carbon powder with a coating weight of 20 mg / cm³. 2 The average particle size of the odor-removing powder is 500μm.

[0099] The first absorbent fiber woven fabric layer 300 is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the first absorbent fiber woven fabric layer 300 is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density and weft density of the first absorbent fiber woven fabric layer 300 are 50 threads / cm and 50 threads / cm, respectively.

[0100] The open-cell foam layer 400 has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer 400 is filled with sustained-release microcapsules 500; the open-cell foam layer 400 is a polyurethane foam layer, the thickness of the open-cell foam layer 400 is 1 mm, the average pore size of the open-cell foam layer 400 is 500 μm, and the porosity of the open-cell foam layer 400 is 85%; wherein, the sustained-release microcapsule 500 includes a core containing an active ingredient and a capsule wall covering the core, the core being mentholamide, the capsule wall being cyclodextrin, the sustained-release microcapsule 500 having a spherical structure, the particle size of the sustained-release microcapsule 500 being 400 μm, and the thickness of the capsule wall of the sustained-release microcapsule 500 being 80 μm;

[0101] The second absorbent fiber woven fabric layer 301 is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the second absorbent fiber woven fabric layer 301 is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density and weft density of the second absorbent fiber woven fabric layer 301 are both 50 threads / cm.

[0102] Example 2

[0103] This embodiment provides a sanitary napkin composite chip containing sustained-release microcapsules, such as... Figure 1 As shown, the sanitary napkin composite chip comprises, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer 100, an odor-removing layer 200, a first absorbent fiber woven fabric layer 300, an open-cell foam layer 400, and a second absorbent fiber woven fabric layer 301; and the open-cell foam layer is filled with sustained-release microcapsules 500. Figure 2 As shown, the odor-removing layer 200 includes a first coating layer 201 and a second coating layer 202, as well as odor-removing powder 203 coated between the first coating layer 201 and the second coating layer 202.

[0104] The pH of the weak acid nonwoven fabric surface layer 100 is 5, and the thickness of the weak acid nonwoven fabric surface layer 100 is 0.34 mm.

[0105] The first coating layer 201 is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer 202 is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is bamboo charcoal powder, and the coating amount of the odor-removing powder is 20 mg / cm³. 2 The particle size of the odor-removing powder is 500μm.

[0106] The first absorbent fiber woven fabric layer 300 is a bamboo fiber woven fabric layer woven from absorbent bamboo fibers. The thickness of the first absorbent fiber woven fabric layer 300 is 0.35 mm, the fineness of the bamboo fibers is 3 dtex, and the warp density and weft density of the first absorbent fiber woven fabric layer 300 are 50 threads / cm and 50 threads / cm, respectively.

[0107] The open-cell foam layer 400 has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer 400 is filled with sustained-release microcapsules 500; the open-cell foam layer 400 is a polylactic acid pore foam layer, the thickness of the open-cell foam layer 400 is 1 mm, the pore size of the open-cell foam layer 400 is 500 μm, and the porosity of the open-cell foam layer 400 is 85%; wherein, the sustained-release microcapsule 500 includes a core containing an active ingredient and a capsule wall covering the core, the core is menthol ester, the capsule wall is cyclodextrin, the sustained-release microcapsule 500 has a spherical structure, the particle size of the sustained-release microcapsule 500 is 400 μm, and the thickness of the capsule wall of the sustained-release microcapsule 500 is 80 μm;

[0108] The second absorbent fiber woven fabric layer 301 is a bamboo fiber woven fabric layer woven from absorbent bamboo fibers. The thickness of the second absorbent fiber woven fabric layer 301 is 0.35 mm, the fineness of the bamboo fibers is 3 dtex, and the warp density and weft density of the second absorbent fiber woven fabric layer 301 are both 50 threads / cm.

[0109] Example 3

[0110] This embodiment provides a sanitary napkin composite chip containing sustained-release microcapsules, such as... Figure 1 As shown, the sanitary napkin composite chip comprises, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer 100, an odor-removing layer 200, a first absorbent fiber woven fabric layer 300, an open-cell foam layer 400, and a second absorbent fiber woven fabric layer 301; and the open-cell foam layer is filled with sustained-release microcapsules 500. Figure 2As shown, the odor-removing layer 200 includes a first coating layer 201 and a second coating layer 202, as well as odor-removing powder 203 coated between the first coating layer 201 and the second coating layer 202.

[0111] The pH of the weak acid nonwoven fabric surface layer 100 is 5.5, and the thickness of the weak acid nonwoven fabric surface layer 100 is 0.34 mm.

[0112] The first coating layer 201 is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer 202 is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is bamboo charcoal powder, and the coating amount of the odor-removing powder is 20 mg / cm³. 2 The particle size of the odor-removing powder is 500μm.

[0113] The first absorbent fiber woven fabric layer 300 is a bamboo fiber woven fabric layer woven from absorbent bamboo fibers. The thickness of the first absorbent fiber woven fabric layer 300 is 0.35 mm, the fineness of the bamboo fibers is 3 dtex, and the warp density and weft density of the first absorbent fiber woven fabric layer 300 are 50 threads / cm and 50 threads / cm, respectively.

[0114] The open-cell foam layer 400 has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer 400 is filled with sustained-release microcapsules 500; the open-cell foam layer 400 is a polylactic acid pore foam layer, the thickness of the open-cell foam layer 400 is 1 mm, the pore size of the open-cell foam layer 400 is 500 μm, and the porosity of the open-cell foam layer 400 is 60%; wherein, the sustained-release microcapsule 500 includes a core containing an active ingredient and a capsule wall covering the core, the core being menthol, the capsule wall being cyclodextrin, the sustained-release microcapsule 500 having a spherical structure, the particle size of the sustained-release microcapsule 500 being 400 μm, and the thickness of the capsule wall of the sustained-release microcapsule 500 being 80 μm;

[0115] The second absorbent fiber woven fabric layer 301 is a bamboo fiber woven fabric layer woven from absorbent bamboo fibers. The thickness of the second absorbent fiber woven fabric layer 301 is 0.35 mm, the fineness of the bamboo fibers is 3 dtex, and the warp density and weft density of the second absorbent fiber woven fabric layer 301 are both 50 threads / cm.

[0116] Comparative Example 1

[0117] This comparative example provides a sanitary napkin composite chip, which includes, from top to bottom, a weakly acidic non-woven fabric surface layer, an odor-removing layer, and an absorbent fiber woven fabric layer stacked sequentially. The odor-removing layer includes a first covering layer and a second covering layer, as well as odor-removing powder encapsulated between the first and second covering layers.

[0118] The pH of the weak acid nonwoven fabric surface layer is 4.5, and the thickness of the weak acid nonwoven fabric surface layer is 0.34 mm.

[0119] The first coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is activated carbon powder with a coating weight of 20 mg / cm³. 2 The particle size of the odor-removing powder is 500μm.

[0120] The absorbent fiber woven fabric layer is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the absorbent fiber woven fabric layer is 1.7 mm, the fineness of the hemp fibers is 3 dtex, and the warp density of the first absorbent fiber woven fabric layer is 50 threads / cm and the weft density is 50 threads / cm.

[0121] Comparative Example 2

[0122] This comparative example provides a sanitary napkin composite chip, which includes, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer, an odor-removing layer, a first absorbent fiber woven fabric layer, a nonwoven fabric surface layer loaded with sustained-release microcapsules, and a second absorbent fiber woven fabric layer. The odor-removing layer includes a first coating layer and a second coating layer, as well as odor-removing powder encapsulated between the first and second coating layers.

[0123] The pH of the weak acid nonwoven fabric surface layer is 4.5, and the thickness of the weak acid nonwoven fabric surface layer is 0.34 mm.

[0124] The first coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is activated carbon powder with a coating weight of 20 mg / cm³. 2 The average particle size of the odor-removing powder is 500μm.

[0125] The first absorbent fiber woven fabric layer is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the first absorbent fiber woven fabric layer is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density of the first absorbent fiber woven fabric layer 300 is 50 threads / cm and the weft density is 50 threads / cm.

[0126] The method for preparing the nonwoven fabric surface layer of the loaded sustained-release microcapsules is as follows: a nonwoven fabric with a thickness of 1 mm is impregnated at room temperature with a 20 wt% ethanol solution of sustained-release microcapsules (liquid content of 14 ± 1 g / m). 2 After drying, the sustained-release microcapsules 500 are obtained; wherein, the sustained-release microcapsules 500 include a core containing an active ingredient and a capsule wall covering the core, wherein the core is menthol, the capsule wall is cyclodextrin, the sustained-release microcapsules 500 have a spherical structure, the particle size of the sustained-release microcapsules 500 is 400 μm, and the thickness of the capsule wall of the sustained-release microcapsules 500 is 80 μm;

[0127] The second absorbent fiber woven fabric layer 301 is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the second absorbent fiber woven fabric layer 301 is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density and weft density of the second absorbent fiber woven fabric layer 301 are both 50 threads / cm.

[0128] Comparative Example 3

[0129] This comparative example provides a sanitary napkin composite chip, which includes, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer, an odor-removing layer, a first nonwoven fabric layer, an open-cell foam layer, and a second nonwoven fabric layer; and the open-cell foam layer is filled with sustained-release microcapsules. The odor-removing layer includes a first coating layer and a second coating layer, and odor-removing powder coated between the first coating layer and the second coating layer.

[0130] The pH of the weak acid nonwoven fabric surface layer is 4.5, and the thickness of the weak acid nonwoven fabric surface layer is 0.34 mm.

[0131] The first coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the second coating layer is a non-woven fabric layer with a thickness of 0.32 mm; the odor-removing powder is activated carbon powder with a coating weight of 20 mg / cm³. 2 The average particle size of the odor-removing powder is 500μm.

[0132] The thickness of the first nonwoven fabric layer is 0.35 mm.

[0133] The open-cell foam layer has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer is filled with sustained-release microcapsules; the open-cell foam layer is a polyurethane foam layer with a thickness of 1 mm, an average pore size of 500 μm, and a porosity of 85%; the sustained-release microcapsules include a core containing an active ingredient and a capsule wall covering the core; the core is menthol, the capsule wall is cyclodextrin, the sustained-release microcapsules have a spherical structure, a particle size of 400 μm, and a capsule wall thickness of 80 μm;

[0134] The thickness of the second nonwoven fabric layer is 0.35 mm.

[0135] Comparative Example 4

[0136] This comparative example provides a sanitary napkin composite chip, which includes, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer, a fragrance layer, a first absorbent fiber woven fabric layer, an open-cell foam layer, and a second absorbent fiber woven fabric layer; and the open-cell foam layer is filled with sustained-release microcapsules.

[0137] The pH of the weak acid nonwoven fabric surface layer is 4.5, and the thickness of the weak acid nonwoven fabric surface layer is 0.34 mm.

[0138] The fragrance layer is a non-woven fabric layer loaded with 0.1 wt% fragrance and has a thickness of 0.64 mm.

[0139] The first absorbent fiber woven fabric layer is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the first absorbent fiber woven fabric layer is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density and weft density of the first absorbent fiber woven fabric layer are 50 threads / cm and 50 threads / cm, respectively.

[0140] The open-cell foam layer has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer is filled with sustained-release microcapsules; the open-cell foam layer is a polyurethane foam layer with a thickness of 1 mm, an average pore size of 500 μm, and a porosity of 85%; the sustained-release microcapsules include a core containing an active ingredient and a capsule wall covering the core; the core is menthol, the capsule wall is cyclodextrin, the sustained-release microcapsules have a spherical structure, a particle size of 400 μm, and a capsule wall thickness of 80 μm;

[0141] The second absorbent fiber woven fabric layer is a hemp fiber woven fabric layer woven from absorbent hemp fibers. The thickness of the second absorbent fiber woven fabric layer is 0.35 mm, the fineness of the hemp fibers is 3 dtex, and the warp density and weft density of the second absorbent fiber woven fabric layer are 50 threads / cm and 50 threads / cm, respectively.

[0142] Test case

[0143] Test samples: sanitary napkin composite chips containing sustained-release microcapsules provided in Examples 1-3, and sanitary napkin composite chips provided in Comparative Examples 1-4.

[0144] Test method:

[0145] (1) Odor removal test: The odor removal test was conducted in accordance with the standard GB / T 45369-2025 "Evaluation method for deodorization effect of absorbent sanitary paper products and raw materials". Trimethylamine was used as the odor source, and liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry were used to obtain the deodorization effect value.

[0146] (2) Determination of absorption rate: Refer to GB / T 8939 "Sanitary Napkins (Patrolleys)" test standard.

[0147] (3) Reverse osmosis volume: Self-tested with reference to industry standards.

[0148] a. Instruments and test solutions

[0149] a1. Stopwatch, accurate to 0.01 seconds;

[0150] a2. Permeability tester;

[0151] a3.10mL graduated pipette (1 piece); standard pressure block, Ф100mm, 1.2kg; (provides pressure of 153Pa);

[0152] a4. Several sheets of Ф9 medium-speed chemical qualitative analysis filter paper (GB / T 1914), hereinafter referred to as "filter paper";

[0153] a5. Prepare the test solution according to Appendix B of GB / T 8939 "Sanitary Napkins (Patrolleys)" test standard.

[0154] b. Test Procedure

[0155] b1. Place the permeability tester in a horizontal position, adjust the upper panel to be horizontal, and then adjust the height of the lower opening of the discharge funnel so that the lowest point of its lower opening is 5-10 mm from the sample surface; the lower opening of the funnel should face the operator. Pour an appropriate amount of test solution into the funnel to wet the funnel, and wash the funnel twice with the solution, then drain the solution from the funnel.

[0156] b2. Place the sanitary napkin to be tested flat on the tester panel, aligning the injection point of the sanitary napkin with the center point of the lower opening of the dispensing funnel. Gently stick the sanitary napkin to the panel below for testing. Zero the stopwatch and prepare to start timing.

[0157] b3. Use a graduated pipette to transfer 5 mL of the test solution into the funnel, open the funnel door to the maximum, and let the solution flow freely onto the surface of the sanitary napkin. At the same time, start the stopwatch.

[0158] b4. Resume timing immediately after testing the absorption rate. At 20 seconds after absorption, place several layers of filter paper (Ф125mm, known mass m0) on the sample surface, simultaneously pressing a standard pressure block onto the filter paper. After applying pressure for 1 minute, remove the standard pressure block and weigh the filter paper using a balance to determine its mass m1. Close the funnel gate after the test and wipe away any remaining solution at the bottom of the funnel.

[0159] b5. Record the test temperature and test liquid viscosity data; record the test data.

[0160] b6. If liquid leakage occurs during the experiment, the sample shall be discarded.

[0161] b7. Third absorption reverse osmosis test: Take another sample, and after conducting the test according to b3 above, keep the timer continuously until the 5th minute. Then, add 5 mL of liquid to the same part of the product for the second time according to the above steps. When the stopwatch reaches 9 minutes, conduct the third absorption reverse osmosis test according to b4.

[0162] c. Calculation of test results

[0163] The backflow rate of a sample is expressed as the amount (g) of liquid that re-permeates onto the filter paper after absorption by the sample. Five samples are measured for each sample, and the backflow rate (m³) of each sample is calculated according to the following formula. i ).

[0164] m i =m1-m0

[0165] Where: m i m1 represents the amount of liquid absorbed by the filter paper after the i-th reverse osmosis, in g; m2 represents the mass of the filter paper after absorbing the liquid, in g; m3 represents the mass of the filter paper before absorbing the liquid, in g. The arithmetic mean of the five samples is taken as the final test result, accurate to 0.1g.

[0166] (4) Air permeability: Refer to GB / T 5453 "Determination of air permeability of fabrics" test standard.

[0167] (5) Cooling duration: A custom test method was used. Since the cooling ingredients are volatile, a liquid chromatograph was used with methanol as the mobile phase, the wavelength was set to 254 nm, and the injection volume was 10 μL. The content of the cooling ingredients in the product was tested at regular intervals, and the changes in the content of the cooling ingredients over time were recorded until there were no cooling ingredients, thus providing feedback on the cooling duration.

[0168] The specific test results are shown in Table 1 below (" / " indicates that this test was not performed):

[0169] Table 1

[0170]

[0171]

[0172] As shown in Table 1, the sanitary napkin composite chip containing sustained-release microcapsules of this invention has advantages such as maintaining a healthy pH balance, antibacterial and bacteriostatic properties, effective odor removal, rapid flow, strong breathability, continuous sustained release, rapid drying, and overall comfort and protection.

[0173] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sanitary napkin composite chip containing sustained-release microcapsules, characterized in that, The sanitary napkin composite chip comprises, from top to bottom, the following layers stacked sequentially: a weakly acidic nonwoven fabric surface layer, an odor-removing layer, a first absorbent fiber woven fabric layer, an open-cell foam layer, and a second absorbent fiber woven fabric layer; and the open-cell foam layer is filled with sustained-release microcapsules.

2. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1, characterized in that, The pH of the weakly acidic nonwoven fabric surface layer is 4 to 6; And / or, the thickness of the weak acid nonwoven fabric surface layer is 0.3 to 1.0 mm.

3. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1, characterized in that, The odor-removing layer includes a first coating layer and a second coating layer, as well as odor-removing powder sandwiched between the first coating layer and the second coating layer.

4. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 3, characterized in that, The first and second covering layers are each independently a nonwoven fabric layer and / or a meltblown fabric layer; And / or, the thickness of the first coating layer and the second coating layer are each independently 0.3 to 1.0 mm; And / or, the coating amount of the odor-removing powder is 15-25 mg / cm³. 2 ; And / or, the particle size of the odor-removing powder is 400-600 μm.

5. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1, characterized in that, The first absorbent fiber woven fabric layer is made of absorbent fibers; And / or, the thickness of the first absorbent fiber woven fabric layer is 0.3 to 1.0 mm; And / or, the fineness of the absorbent fiber is 1.5 to 5.0 dtex; And / or, the warp density of the first absorbent fiber woven fabric layer is 20 to 80 threads / cm; And / or, the weft density of the first absorbent fiber woven fabric layer is 20 to 80 threads / cm.

6. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1, characterized in that, The interior of the open-cell foam layer has a three-dimensional interconnected pore structure with a honeycomb topology; and the pore structure of the open-cell foam layer is filled with sustained-release microcapsules.

7. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1 or 6, characterized in that, The thickness of the open-cell foam layer is 0.5–1.0 mm; And / or, the pore size of the open-cell foam layer is 300-500 μm; And / or, the porosity of the open-cell foam layer is 60-95%.

8. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1 or 6, characterized in that, The sustained-release microcapsule comprises a core containing functional ingredients and a capsule wall covering the core. And / or, the sustained-release microcapsules have a spherical structure; And / or, the particle size of the sustained-release microcapsules is 200–450 μm; And / or, the thickness of the capsule wall of the sustained-release microcapsule is 30–200 μm.

9. The sanitary napkin composite chip containing sustained-release microcapsules according to claim 1, characterized in that, The second absorbent fiber woven fabric layer is made of absorbent fibers; And / or, the thickness of the second absorbent fiber woven fabric layer is 0.3 to 1.0 mm; And / or, the fineness of the absorbent fiber is 1.5 to 5.0 dtex; And / or, the warp density of the second absorbent fiber woven fabric layer is 20 to 80 threads / cm; And / or, the weft density of the second absorbent fiber woven fabric layer is 20 to 80 threads / cm.

10. A sanitary napkin, characterized in that, The sanitary napkin includes a sanitary napkin composite chip containing sustained-release microcapsules as described in any one of claims 1 to 9.

Images