Feminine absorbent article with antibacterial function

Abstract

The utility model discloses a female absorbent article with antibacterial function, which comprises a liquid-permeable topsheet layer, a flow guide layer located below the topsheet layer, the flow guide layer having a first side facing the topsheet layer and a second side facing away from the topsheet layer, a liquid-impermeable backsheet layer located at the lowermost part of the absorbent article, an absorbent core positioned between the second side of the flow guide layer and the backsheet layer, and a non-dissolved antibacterial layer located on the second side of the flow guide layer. Thus, the utility model can effectively inhibit and remove harmful bacteria breeding in menstrual blood while not damaging the beneficial bacterial colonies of the wearer of the absorbent article.

Description

Technical Field

[0001] This utility model relates to the field of hygiene products technology, specifically to a feminine absorbent product with antibacterial function and one-way moisture wicking capability. Background Technology

[0002] Feminine absorbent products, such as sanitary napkins, are often used to collect and retain bodily fluids containing, for example, menstrual flow and / or blood. Comfort, absorbency, and fit are three key product attributes and areas of concern for the wearer. In particular, wearers are often interested in learning about such products because they absorb large amounts of menstrual blood with minimal leakage, preventing stains on their underwear, outerwear, or sheets, and helping them avoid the subsequent embarrassment of such stains.

[0003] Known absorbent products of this type are typically long and narrow, mainly consisting of a sanitary napkin body with an absorbent pad, used to absorb menstrual blood flowing from the vagina during menstruation. The menstrual blood flows through a top layer, a guide layer, and a composite core made of fluff pulp or a mixture of fluff pulp and superabsorbent material, arranged sequentially from top to bottom (or from inside to outside), and is ultimately absorbed and retained within the composite core. Because menstrual blood often has an odor and bacteria easily grow on sanitary napkins, increasing the risk of reproductive and urinary tract infections, this leads to the following drawbacks: after prolonged use, especially in humid and hot environments like summer, the menstrual blood stored in the sanitary napkin can easily breed bacteria that affect human health and produce an unpleasant odor.

[0004] Therefore, some have proposed using silver ions, traditional Chinese medicine ingredients, chitosan fibers, and aromatic fibers to achieve antibacterial and deodorizing functions. Specifically, the fragrance emitted by aromatic fibers can mask odors, the good moisture absorption of chitosan fibers can absorb some bodily fluids, and the antibacterial and deodorizing properties of chitosan fibers can inhibit bacterial growth, thus eliminating odors. The antibacterial effect can also be achieved by adding traditional Chinese medicine ingredients and nano-silver to the absorbent core. However, in practice, such sanitary napkins have not achieved satisfactory results. Their shortcomings include adverse effects on the health of female consumers or the beneficial bacterial community, insufficient targeted antibacterial action with a significant proportion of harmful bacteria remaining, and failure to eliminate odors at their source.

[0005] At the same time, existing absorbent products for women still fall short of meeting consumer needs in terms of dryness when worn. A significant proportion of consumers have reported that current absorbent products feel sticky during use.

[0006] Therefore, there remains a need for improved absorbent products, such as those that effectively inhibit and remove harmful bacteria that thrive in menstrual blood without disrupting the wearer's own beneficial flora. Secondly, these improved products should provide consumers with a drier feel and effectively reduce the likelihood of identifiable odors emanating while wearing sanitary napkins. Utility Model Content

[0007] Therefore, the objective of this invention is to provide an absorbent product for women, thereby overcoming the shortcomings of the prior art.

[0008] To accomplish the above tasks, this utility model provides a feminine absorbent product with antibacterial function, wherein the feminine absorbent product extends in the longitudinal direction, the transverse direction, and the depth direction, and includes: a liquid-permeable top sheet layer, wherein the top sheet layer includes a blend of hydrophilic and hydrophobic fibers, wherein the hydrophilic fibers include a fiber core and a hydrophilic material layer covering the fiber core; a flow-guiding layer located below the top sheet layer, wherein the flow-guiding layer has a first side facing the top sheet layer and a second side facing away from the top sheet layer; a liquid-impermeable bottom sheet layer located at the bottom of the absorbent product; and an absorbent core positioned between the second side of the flow-guiding layer and the bottom sheet layer, wherein the... A portion of the absorbent core is positioned in the central region of the absorbent article to receive liquid seeping from the drainage layer; and an antibacterial layer is located on the second side of the drainage layer, wherein the antibacterial layer is designed to face and cover the portion of the absorbent core positioned in the central region of the absorbent article, and is a non-leaching antibacterial coating; wherein the absorbent core of the absorbent article has a central protrusion that rises outward from the body-facing side to a certain height, wherein the central protrusion is designed to be generally peanut-shaped with a first width and conforming to the vaginal opening, wherein the antibacterial layer located on the second side of the drainage layer has a second width, wherein the second width is greater than the first width of the central protrusion.

[0009] Therefore, the absorbent product provided by this utility model has a non-leaching antibacterial coating added to the second side of the flow guide layer. The antibacterial coating is designed to face and cover the part of the absorbent core located in the central area of ​​the absorbent product, so as to perform targeted antibacterial treatment on the part where menstrual blood is most abundant. At the same time, the non-leaching antibacterial agent will not be absorbed by the body's secretions and enter the body, thereby avoiding damage to the wearer's own beneficial bacteria.

[0010] As a preferred aspect, the material further includes a backing paper layer located between the flow guiding layer and the substrate layer, wherein the backing paper layer surrounds the outer periphery of the absorbent core, wherein the flow guiding layer comprises a blend of first fibers having a first fineness and second fibers having a second fineness interwoven with each other, wherein voids for liquid infiltration are formed near the interlacing point of the first and second fibers, wherein the first fineness is less than the second fineness.

[0011] As a preferred aspect, the topsheet layer includes a first side facing the body and a second side facing the clothing, wherein the first side of the topsheet layer includes hydrophobic fibers, wherein the hydrophilic fibers include a fiber core and a hydrophobic material layer covering the fiber core, and wherein the second side of the topsheet layer includes the hydrophilic fibers.

[0012] As a preferred aspect, the weight ratio of the hydrophilic fiber to the hydrophobic fiber is about 10:90 to 90:10, and the top sheet layer has a basis weight of about 8 gsm to 70 gsm.

[0013] As a preferred aspect, the first fineness of the first fiber is designed to be about 1 to 6 denier, and the second fineness of the second fiber is designed to be 4 to 15 denier.

[0014] As a preferred aspect, the voids in the flow guide layer have an average area of ​​0.5 square millimeters to 2.5 square millimeters, and these voids together constitute 6% to 25% of the total area of ​​the flow guide layer's opening area.

[0015] As a preferred aspect, the non-leaching antibacterial coating is selected from the group consisting of chitosan, silver-based antibacterial agents, zinc-based antibacterial agents, and copper-based antibacterial agents, wherein the chitosan content in the antibacterial coating is from 0.01% to 20%.

[0016] As a preferred aspect, the liquid-permeable topsheet layer is designed to have a 30% to 60% improvement in dryness. Attached Figure Description

[0017] Figure 1 This is a perspective view of an embodiment of the absorbent article.

[0018] Figure 2 yes Figure 1 A top view of the absorbent component of the absorbent product.

[0019] Figure 3 yes Figure 2 A top view of a local area of ​​the absorption component.

[0020] Figure 4 yes Figure 2 A side view of the absorbent product.

[0021] Reference numerals used repeatedly in this specification and drawings are intended to indicate the same or similar elements of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 100 - Absorbent article; 100A - Central region; 100B - End region;

[0024] 101A, 101B - Side fins; 102 - Top fin layer; 103 - Flow deflector layer;

[0025] 103A, 103B - End edges; 103C, 103D - Side edges;

[0026] 104A, 104B - End edges; 104C, 104D - Side edges;

[0027] 104 - Absorbent core; 105 - Backing layer; 106 - Antibacterial layer; 107 - Liner paper layer;

[0028] L - Longitudinal axis; T - Lateral axis; X - Lateral direction; Y - Longitudinal direction;

[0029] Z - Depth direction; D1 - First width; D2 - Second width; Detailed Implementation

[0030] This utility model relates to an absorbent article for women, which extends in the longitudinal, transverse, and depth directions, and includes: a liquid-permeable top sheet layer, wherein the top sheet layer comprises a blend of hydrophilic and hydrophobic fibers, wherein the hydrophilic fibers include a fiber core and a hydrophilic material layer covering the fiber core; and a flow-guiding layer located below the top sheet layer, wherein the flow-guiding layer comprises a blend of first fibers having a first fineness and second fibers having a second fineness interwoven with each other, wherein a flow-guiding layer for liquid permeation is formed near the interlacing point of the first and second fibers. The pore portion, wherein the flow-guiding layer has a first side facing the top sheet layer and a second side facing away from the top sheet layer, wherein the first fineness is less than the second fineness; a liquid-impermeable backsheet layer located at the bottom of the absorbent article; an absorbent core positioned between the second side of the flow-guiding layer and the backsheet layer, wherein a portion of the absorbent core is positioned in the central region of the absorbent article to receive liquid seeping down from the flow-guiding layer; and an antibacterial layer located on the second side of the flow-guiding layer, wherein the antibacterial layer is designed to face and cover the portion of the absorbent core positioned in the central region of the absorbent article, and is a non-leaching antibacterial coating.

[0031] definition:

[0032] As used herein, the term "absorbent article" refers to an article that can be placed close to or near the wearer's body (i.e., adjacent to the body) to absorb and contain various liquid, solid, and semi-solid excretions from the body. As described herein, such absorbent articles are intended to be discarded after a limited period of use, rather than washed or otherwise restored for reuse. It should be understood that, without departing from the scope of this invention, the absorbent articles for women include, but are not limited to, menstrual pads, sanitary napkins, feminine pads, panty liners, absorbent panty products, and incontinence products.

[0033] As used herein, the terms "bonded" or "jointed" refer to the joining, adhesion, connection, attachment, etc., of two components. When they are joined, adhered, connected, attached, etc., directly or indirectly to each other, such as when bonded to an intermediate component, the two components are considered bonded together. Bonding can be achieved, for example, by adhesives, pressure bonding, thermal bonding, ultrasonic bonding, splicing, stitching, and / or welding.

[0034] As used herein, the term "bonded combed web" refers to a web made of short fibers that are fed through a combing or carding unit that separates or breaks the fibers and aligns them in the machine direction to form a fiber nonwoven web that is generally oriented in the machine direction. This material can be bonded together by methods including point bonding, air-penetration bonding, ultrasonic bonding, adhesive bonding, etc.

[0035] As used herein, the terms “superabsorbent polymer,” “superabsorbent,” or “SAP” are to be used interchangeably and should refer to polymers that can absorb and retain a very large amount of liquid relative to their own mass. Superabsorbent polymers are classified as crosslinkable hydrogels that absorb aqueous solutions through hydrogen bonds and other polar forces with water molecules. The ability of SAP to absorb water is based in part on its degree of ionization (a coefficient of ion concentration in aqueous solutions) and the functional polar groups of SAP that have hydrophilicity. SAP is typically produced by the polymerization of acrylic acid with sodium hydroxide in the presence of an initiator to form sodium polyacrylate (sometimes called sodium polyacrylate).

[0036] As used herein, the term "lateral" refers to a direction parallel to a horizontal line tangent to the front surface of the upper portion of the wearer's legs adjacent to the torso when the absorbent article is worn normally and the wearer is in a flat, square, normal standing position. The "width" dimension of any part or feature of an article, such as a women's absorbent article, is measured in the lateral direction. When an article or its parts are laid flat on a horizontal surface, the "lateral" direction corresponds to the lateral direction relative to the structure when it is worn, as defined above. For an article, such as a women's absorbent article opened and laid flat on a horizontal plane, "lateral" refers to a direction perpendicular to the longitudinal direction and parallel to the horizontal plane.

[0037] As used herein, the "lateral axis" of a feminine absorbent article or component thereof is a horizontal line located in the xy plane, and when the absorbent article or component thereof is laid flat on a horizontal surface, the horizontal line bisects the length of the absorbent article or component thereof. The lateral axis is perpendicular to the longitudinal axis.

[0038] As used herein, "longitudinal" refers to a direction perpendicular to the transverse direction. The "length" dimension of any part or feature of an article is measured along the longitudinal direction from its forward extent to its rearward extent. When an article, such as a women's absorbent article or its parts, is laid flat on a horizontal surface, the "longitudinal" direction is perpendicular to the transverse direction of the absorbent article when it is worn, as defined above.

[0039] As used herein, the term "fiber core" can include fibrous materials made from natural fibers (e.g., cotton, including 100% organic cotton), modified natural fibers, semi-synthetic fibers (e.g., fibers spun from regenerated cellulose), synthetic fibers (e.g., fibers spun from polymer resins), or combinations thereof. Synthetic fibers can include fibers spun from a single polymer or blends of polymers. Synthetic fibers can include monocomponent fibers, bicomponent fibers, or multicomponent fibers.

[0040] The longitudinal axis of a feminine absorbent article or its component is a longitudinal line located in the xy plane, and when the absorbent article is laid flat on a horizontal surface, the longitudinal line bisects the width of the absorbent article or its component. The longitudinal axis is perpendicular to the transverse axis.

[0041] Regarding absorbent articles such as absorbent articles for women or their components, when laid flat on a horizontal surface, the "xy plane" refers to any horizontal plane occupied by any layer of that horizontal surface or article or component.

[0042] Regarding absorbent articles (such as absorbent articles for women or their components), when laid flat on a horizontal surface, the "z direction" is the direction perpendicular to / orthogonal to the xy plane.

[0043] As used herein, the terms “top,” “bottom,” “upper,” “lower,” “above,” “below,” “under,” “upper adjacent,” “lower adjacent,” and similar terms relating to relative vertical positioning, when used herein to refer to a layer, component, or other feature of an absorbent article (such as a feminine absorbent article), are relative to the z-direction and will be interpreted relative to the absorbent article as it would appear when it is laid flat on a horizontal surface, wherein the wearer-facing surface of the absorbent article is oriented upward and the outward-facing surface is oriented downward.

[0044] As used herein, "body-facing" is a relative positional term that refers to a feature of a component or structure that is closer to the wearer than another feature during use. For example, the top sheet layer has a body-facing surface that is closer to the wearer than the opposite, outward-facing surface of the top sheet.

[0045] As used herein, "facing the garment" is a relative positional term that refers to a feature or structure that is further away from the wearer than another feature when in use. For example, a topsheet layer has a garment-facing surface that is further away from the wearer than the opposite, wearer-facing surface of the topsheet.

[0046] Absorbent products for women

[0047] See Figure 1 and 4 For example, the absorbent article 100 for female use can extend to a certain extent along the longitudinal direction (Y direction), the transverse direction (X direction), and the depth direction (Z direction). Here, the absorbent article 100 can have various geometric shapes, but generally has a pair of opposing longitudinal side edges and a pair of opposing transverse end edges. For example... Figure 1 As shown, the absorbent article 100 may have a liquid-permeable top sheet layer 102 facing the body and a liquid-impermeable bottom sheet layer 105 facing the clothing. An absorbent assembly may be positioned between the top sheet layer 102 and the liquid-impermeable bottom sheet layer 105. The absorbent assembly may include a channeling layer 103 located below the top sheet layer 102, wherein the channeling layer 103 has a first side facing the top sheet layer 102 and a second side facing away from the top sheet layer 102, and an absorbent core 104 positioned between the second side of the channeling layer 103 and the bottom sheet layer 105, wherein a portion of the absorbent core 104 is positioned in a central region 100A of the absorbent article to receive liquid seeping down from the channeling layer 103.

[0048] like Figure 1 As shown, both the top film layer 102 and the bottom film layer 105 can extend beyond the outermost peripheral edge of the absorber core 104, and the periphery can be completely bonded together using known bonding techniques for forming a sealed peripheral region. For example, the top film layer 102 and the bottom film layer 105 can be bonded together by adhesive bonding, ultrasonic bonding, or any other suitable bonding method known in the art.

[0049] further, Figure 1The absorbent article 100 may have a pair of side flaps 101A and 101B extending outward from the absorbent article 100 in the lateral direction T. The side flaps 101A and 101B may be folded over the edge of the wearer's underwear, such that the side flaps 101A and 101B are positioned between the edge of the wearer's underwear and their thigh. The side flaps 101A and 101B may serve at least two functions. First, the side flaps 101A and 101B can prevent the wearer's underwear from getting soiled by forming a barrier along the edge of the underwear. Second, the side flaps 101A and 101B may have attachment aids (not shown), such as clothing adhesive or hooks, to keep the absorbent article 10 securely and properly positioned within the underwear. It should be understood that the side flaps 101A and 101B are optional, and in various embodiments, the absorbent article 10 may be constructed without the side flaps 101A and 101B.

[0050] Each of these components of the absorbent article 100 will be described in more detail below.

[0051] Top layer

[0052] The topsheet layer 102 defines a body-facing surface of the absorbent article 100 that is in direct contact with the wearer's body and is liquid-permeable to receive menstrual blood. Ideally, the topsheet layer 102 is configured for comfort and fit, and to guide menstrual blood away from the wearer's body and towards the absorbent components through its own structure. Ideally, the topsheet layer 102 retains almost no liquid in its structure, providing a relatively comfortable and non-irritating surface on the wearer's skin immediately adjacent to the absorbent article 100. Optionally, the topsheet layer 102 may comprise a nonwoven material. It is known that the nonwoven fiber topsheet layer 102 can be produced by any known process for manufacturing nonwoven fiber webs, non-limiting examples of which include spunbond, carding, wet web forming, air-laid web forming, meltblown, needle punching, mechanical winding, thermo-mechanical winding, and hydroentangling.

[0053] Preferably, the top layer 102, as a nonwoven fabric, can be manufactured with a basis weight of approximately 8 gsm to 70 gsm. In practice, such a basis weight range can meet the requirements of the required tensile strength level of the fiber web for processing, as well as the substantial influence of consumer preferences for opacity levels and thickness, feel, and appearance.

[0054] Non-limiting examples of woven and nonwoven materials suitable for use as topsheet layers include fibrous materials made of natural fibers (e.g., cotton, including 100% organic cotton), modified natural fibers, semi-synthetic fibers (e.g., fibers spun from regenerated cellulose), synthetic fibers (e.g., fibers spun from polymer resins), or combinations thereof.

[0055] Preferably, in some examples, the top sheet layer 102 as a nonwoven fabric may comprise a mixture of hydrophobic and hydrophilic fibers, wherein the weight ratio of hydrophilic to hydrophobic fibers is 10:90 to 90:10, more preferably 35:65 to 65:35, and even more preferably 40:60 to 60:40.

[0056] Depending on their chemical composition, the surface of a fiber will inherently be either hydrophilic or hydrophobic. For example, the surface of fibers spun from or otherwise formed from some types of polymers, such as polyethylene and polypropylene, will inherently be hydrophobic. In contrast, the surface of other types of fibers, such as those spun from regenerated cellulose (e.g., viscose, lyocell, etc.), is inherently hydrophilic. The surface of natural fibers can also inherently be hydrophilic or hydrophobic, but this can depend on the processing the fibers have undergone. For example, harvested cotton fibers have a coating of natural oils and / or waxes, and therefore their surfaces are hydrophobic. However, after they have undergone processes including scrubbing and bleaching, the oils and / or waxes are removed, making the fiber surface hydrophilic.

[0057] As described above, the hydrophilicity of hydrophilic fibers can be influenced by applying a surface treatment composition, such that the hydrophilic fiber comprises a fiber core and a hydrophilic material layer covering the fiber core. The inventors believe that, when the majority of the fiber is hydrophilic, fluid collection rates can be improved by combining it with other features described herein without unduly affecting reabsorption in an unfavorable or unacceptably unfavorable manner. The opposite may be true when the goal is less reabsorption. In this case, a higher weight fraction of hydrophobic fibers may be desired. Similarly, hydrophobicity can also be influenced by applying a surface treatment composition, wherein the hydrophobic fiber comprises a fiber core and a hydrophobic material layer covering the fiber core. Here, a first side of the top sheet layer comprises hydrophobic fibers, and a second side of the top sheet layer comprises hydrophilic fibers.

[0058] Specifically, by utilizing the design of the top layer 102, which comprises a mixture of hydrophobic and hydrophilic fibers, the top layer 102 of the absorbent article 100 of this invention can achieve both "dryness" and "rapid absorption," two seemingly dissimilar characteristics. This is because, on the one hand, the first side (the side facing the body) of the top layer 102 is composed of hydrophobic fibers that have undergone a certain hydrophobic treatment, which reduces the interaction force between the first side of the top layer 102 and bodily fluids such as menstrual blood. This helps to increase the contact angle between them, making it less likely for menstrual blood and other bodily fluids to spread on the body-facing side of the top layer 102. As a result, this reduces the amount of bodily fluids on the body-facing side of the top layer 102 and the skin-contacting surface, thereby increasing the wearer's perceived dryness. On the other hand, the second side (the side facing the clothing) of the top layer 102 is composed of hydrophilic fibers that have undergone a certain hydrophilic treatment, allowing bodily fluids to quickly pass through the fiber gaps under their own weight and high polarity, and be discharged downwards by the second side (the side facing the clothing) of the top layer 102, thereby quickly guiding the liquid to the absorbent core 104 located below the top layer 102.

[0059] Flow deflector

[0060] A non-limiting example of the configuration of the flow guide layer 103 is schematically depicted in Figure 2-4 As shown, the flow-guiding layer 103 may have opposing end edges 103A and 103B that extend substantially parallel to the transverse axis T, and side edges 103C and 103D that extend substantially parallel to the longitudinal axis L. Similarly, the absorber core 104 located below it may have opposing end edges 104A and 104B that extend substantially parallel to the transverse axis T, and side edges 104C and 104D that extend substantially parallel to the longitudinal axis L. Figure 3 As shown, each of the end edges 103A and 103B of the flow guiding layer 103 may be disposed longitudinally on the outer side of the absorber core 104. However, this is not necessarily required. For example, end edges 103A and / or 103B may extend co-exist with the absorber core 104, or end edges 103A and / or 103B may be disposed longitudinally on the inner side of end edges 104A and / or 104B of the absorber core 104. Similarly, side edges 103C and / or 103D may be disposed laterally on the outer side of side edges 104C and / or 104D of the absorber core 104. Alternatively, side edges 103C and / or 103D may extend laterally co-exist with side edges 104C and / or 104D of the absorber core 104.

[0061] In this invention, the aim is to provide the flow-guiding layer 103 with sufficient pores to allow for rapid collection of bodily fluids while keeping the fluids away from the top layer 102 to reduce the chance of backflow. The inventors have discovered that by combining and proportioning fibers of different thicknesses and deniers, and rationally controlling the gaps between the fibers in the flow-guiding layer, liquid can rapidly permeate to the absorbent core 104. Based on this, the flow-guiding layer 103 in this invention comprises a blend of first fibers with a first fineness and second fibers with a second fineness interwoven with each other, wherein gaps for liquid permeation are formed near the interlacing points of the first and second fibers. The flow-guiding layer has a first side facing the top layer and a second side facing away from the top layer, wherein the first fineness is less than the second fineness. Preferably, the first fineness of the first fiber is designed to be about 1 to 6 deniers and the second fineness of the second fiber is designed to be 4 to 15 deniers. Of course, those skilled in the art will understand that the flow-guiding layer can also be formed by interlacing fibers with substantially the same denier, wherein voids for liquid infiltration are formed near the interlacing points of these fibers. A flow-guiding layer designed in this way also falls within the protection scope of this utility model.

[0062] With this design, the collection rate can be significantly increased by forming a pattern of voids that allow liquid to flow through the guide layer 103. Preferably, the voids in the guide layer 103 have an average area of ​​0.5 mm² to 2.5 mm², and these voids collectively constitute 6% to 25% of the total area of ​​the guide layer's opening area. It is believed that if the shape of the voids is too long or too narrow, the fluid collection rate may be negatively affected. Therefore, it is desirable for the voids to have a finite maximum average aspect ratio in the xy direction (maximum size: minimum size in the xy direction). Thus, it is desirable for the average aspect ratio of the voids to be from about 2.5:1 to 1:2.5, and all combinations of sub-ranges within these ranges are envisioned herein.

[0063] A schematic depiction of a non-limiting example of a cross-section along the z-direction of the guide layer 103 as envisioned herein is provided. Figure 4 As shown, the flow-guiding layer 103 has a first side, which is the body-facing surface of the flow-guiding layer 103, and a second side opposite to it, which is the side facing the clothing and away from the top sheet layer 102.

[0064] Antibacterial layer

[0065] In order to ensure that harmful bacteria that grow in menstrual blood are effectively inhibited and removed without damaging the wearer's own beneficial bacteria, an antibacterial layer 106 is provided on the second side of the flow-guiding layer 103 in this invention. This antibacterial layer is designed to face and cover the portion of the absorbent core 104 located in the central area of ​​the absorbent product and is a non-leaching antibacterial coating.

[0066] The inventors of this invention have discovered that the menstrual blood absorbed by the absorbent core 104 of the absorbent product 100 is not evenly or widely distributed throughout the entire absorbent core 104, but rather concentrated in the absorbent core 104 near the wearer's vaginal opening. The area within the absorbent core 104 where menstrual blood is most concentrated is the first area to experience bacterial growth and odor; therefore, effective antibacterial treatment targeting this key area will yield significantly better results.

[0067] Preferably, the antibacterial layer 106 is located on the second side of the flow guiding layer 103 directly above the absorbent core 104, and more preferably directly above the central protrusion of the absorbent core 104. Here, the antibacterial layer 106 preferably has a second width D2, which is greater than the first width D1 of the central protrusion as described in detail below. For example, if the first width D1 is in the range of 3.5 cm to 4.5 cm, preferably 4 cm, the second width D2 is in the range of 5 to 7 cm.

[0068] Here, the antibacterial layer 106 is preferably a chitosan antibacterial coating, for example. The mass fraction of chitosan antibacterial agent in the antibacterial layer 106 is 0.01%-20%. Chitosan is a deacetylated derivative of chitin, possessing good biocompatibility, biodegradability, natural non-toxicity, and various biological activities, especially broad-spectrum antibacterial properties. Furthermore, due to the presence of numerous amino and hydroxyl groups on its molecular chain, it exhibits high reactivity and readily undergoes complexation reactions with transition metal ions.

[0069] As a feasible method for forming the antibacterial layer 106, the antibacterial agent can be directly sprayed onto the second side of the flow-guiding layer 103. Since the chitosan antibacterial agent is a non-leaching chitosan, it forms chemical bonds with the fibers on the fiber surface of the second side of the flow-guiding layer 103, causing the chitosan to chemically bond with the fibers. This chemical bonding method surrounds the outer periphery of the fibers in the flow-guiding layer 103 as a coating or outer layer, thus giving the antibacterial layer 106 coated on the outer surface of the fibers on the second side of the flow-guiding layer 103 durability and antibacterial effect. Because this antibacterial layer 106 directly faces the menstrual blood accumulated in the central protrusion, it effectively inhibits the growth of harmful bacteria. Furthermore, since the non-leaching antibacterial layer 106 is only arranged on the second side of the diversion layer 103, rather than on the first side of the top sheet layer 102 or the diversion layer 103, the wearer's skin is outside the effective range of the antibacterial layer 106 that provides antibacterial effect (in other words, the wearer's skin is not affected by the antibacterial layer 106). Therefore, the non-leaching antibacterial agent will not be absorbed by the body's secretions and enter the body, thereby avoiding damage to the wearer's own beneficial flora.

[0070] Here, the antibacterial layer 106 can also be, for example, a silver-based antibacterial agent coating. The silver component, as the antibacterial active ingredient, can exist in the form of a silver-containing compound or in the form of metallic silver (such as silver nanoparticles). The above descriptions are merely feasible embodiments and are not intended to limit the scope of this invention. Examples of silver-containing compounds include: silver nitrate, silver nitrite, silver sulfate, silver sulfite, silver hypochlorite, silver phosphate, silver dihydrogen citrate, silver oxalate, silver acetate, silver carboante, silver formate, silver benzoate, silver propionate, silver selenate, silver tetrafluoroborate, silver chloride, silver bromide, silver iodide, silver arsenate, silver oxide nitrate, and silver sulfadiazine.

[0071] Here, the antibacterial layer 106 can also be, for example, a zinc-based antibacterial coating. The zinc component, as the antibacterial active ingredient, can exist in the form of a zinc-containing compound or in the form of nano-zinc particles. Examples of zinc-containing compounds include: zinc perchlorate, zinc nitrate, zinc citrate, zinc oxalate, zinc acetate, zinc borate, zinc carbonate, zinc ricinoleate, zinc undecylenate, sodium tetrahydroxozincate(2-), zinc chloride, zinc iodide, zinc bromide, zinc pyrithione, and zinc oxide. The zinc-containing compound is preferably zinc citrate, zinc acetate, or zinc oxide.

[0072] Absorption core

[0073] like Figure 2 and 4 As shown, in this example, the absorber core 104 is positioned between the second side of the flow guiding layer 103 and the substrate layer 105. Figure 2 As shown, at least a portion of the absorbent core 104 is positioned within the central region 100A of the absorbent article 100 to receive liquid permeated from the channeling layer 103 when the absorbent article 100 is correctly or appropriately placed within the wearer's underwear. The absorbent core 104 can have any suitable shape, including but not limited to elliptical, stadium-shaped, rectangular, asymmetrical, peanut-shaped, trapezoidal, rounded trapezoidal, oval, and hourglass shapes. The configuration and construction of the absorbent core 104 can vary (e.g., the absorbent core 104 may have different thickness zones, hydrophilic gradients, superabsorption gradients, or lower average density and lower average basis weight collection zones). Furthermore, the size and absorbency of the absorbent core 104 can also vary to accommodate various wearers. However, the total absorbency of the absorbent core 104 should conform to the design load and intended use of the disposable absorbent article.

[0074] like Figure 4As best illustrated, the absorbent core of the absorbent article has a central protrusion that bulges outward from the body side, with a certain height. This central protrusion is designed to be generally peanut-shaped, conforming to the vaginal opening, and has a first width D1. Here, the first width D1 is, for example, in the range of 3.5 cm to 4.5 cm, preferably 4 cm. The central protrusion may be made of pulp or a material mixed with superabsorbent polymers (SAP) to meet the needs of users with high discharge volumes. Due to the three-dimensional structure of the central protrusion, the amount of absorbent material used can be significantly increased to enhance absorbency. Preferably, the central protrusion can be perforated to improve the penetration of menstrual blood and allow the central protrusion to absorb menstrual blood from the body more quickly and in greater quantities.

[0075] Preferably, such as Figure 4 As shown, the absorbent article also includes a paper backing layer 107 for wrapping the absorbent core 104. The paper backing layer may be formed of one or more nonwoven materials, paper, films, or other materials, or laminates thereof. In one form, the paper backing layer may be formed of only a single material, substrate, laminate, or other material that wraps around itself at least partially.

[0076] The absorbent core 104 may include one or more adhesives, for example, to help secure SAP or other absorbent materials within the first and second layer composites. Suitable absorbent cores comprising a relatively large amount of superabsorbent polymer (“SAP” – also known as “absorbent gelling material” or “AGM”) with various pore designs are disclosed in international publication WO 2012 / 052172, the full text of which is incorporated herein by reference.

[0077] film layer

[0078] The backing layer 105 may be disposed beneath the absorbent core 104 and is the outermost layer of the absorbent article 100, thereby forming the surface of the absorbent article 100 facing the garment. The backing layer 105 may be bonded to the absorbent core 104 and / or the top layer 102 (around the outer periphery) by any suitable attachment method known in the art. For example, the backing layer 105 may be secured to the absorbent core 104 by a uniform, continuous layer of adhesive, a patterned layer of adhesive, or a separate array of adhesive lines, spirals, or dots. Alternatively, the attachment method may include the use of thermal bonding, pressure bonding, ultrasonic bonding, dynamic mechanical bonding, or any other suitable attachment method or combination of these methods known in the art.

[0079] The backing layer 105 may be impermeable or substantially impermeable to liquids (e.g., urine, menstrual fluid) under normal use conditions and may be made of a thin plastic film, but other liquid-impermeable flexible materials may also be used. The backing layer 105 prevents or at least inhibits the wetting of underwear, outerwear, bedding, etc. (which may be in contact with or adjacent to the article 10) by outflows absorbed and contained in the absorbent core 104. However, in some examples, the backing layer 105 may be configured to allow vapor to escape from the absorbent core 104 (i.e., “breathable”), while in other examples, the backing layer 105 may be configured to be vapor-impermeable (i.e., impermeable). The backing layer 105 may comprise a polymer film, such as a polyethylene film or a polypropylene film. Suitable materials for the backing layer 105 are thermoplastic films having a thickness of approximately 0.012 mm (0.5 mils) to 0.051 mm (2.0 mils). Any suitable liquid-impermeable backing known in the art may be used in this invention.

[0080] The backing layer 105 acts as a barrier to prevent fluid absorbed and retained in the absorbent core 104 from migrating to the outward-facing surface of the pad. The preferred material is a soft, smooth, and compliant vapor-permeable material that provides comfortable softness and conformability, and produces low noise, preventing annoying noise during movement.

[0081] The substrate can be a nonwoven fiber web with a basis weight of approximately 20 gsm to 50 gsm. In one example, the substrate can be a spunbond nonwoven fiber web of 23 gsm hydrophobic 4 denier polypropylene fiber, traded under the name F102301001, purchased from Fiberweb Neuberger.

[0082] The backing has an outward-facing side and an opposite, wearer-facing side. The outward-facing side of the backing may include a non-adhesive area and an adhesive area. To allow the user / wearer to attach the pad to the wearer-facing surface of her underwear in a suitable position, an adhesive area can be provided by any conventional means. Pressure-sensitive adhesives have been found to be very suitable for this application.

[0083] Test results and data

[0084] The antimicrobial properties of this invention were evaluated using the methods in the following standards: GB15979-2002C.5 (“Hygienic Standard for Disposable Hygiene Products”), Appendix E of GB15979-2024, GBT 20944.3-2008 (“Evaluation of Antimicrobial Properties of Textiles Part 3: Vibration Method”), and the hygiene industry standard WS / T650-2019 (“Evaluation Method for Antimicrobial and Bacteriostatic Effects”), the full text of which is hereby included within the scope of this application.

[0085] Specifically, *Escherichia coli* (8099 or CICC 10899) or *Escherichia coli* (ATCC 25922), *Staphylococcus aureus* (ATCC 6538 or ATCC 25923), *Candida albicans* (ATCC 10231), and *Gardnerella vaginalis* (ATCC 14018) were used as test bacteria. For the absorbent product of this invention, a shaking flask test was selected to evaluate the product's antibacterial properties.

[0086] First, cut the material into 10 mm × 10 mm samples, weigh out two 0.75 g portions and place them into 250 mL conical flasks respectively.

[0087] Place 0.75g of the sample into a 250mL Erlenmeyer flask, add 70mL of PBS and 5mL of bacterial suspension, respectively, to make the concentration of the bacterial suspension in PBS 1 × 10⁻⁶. 4 ~9 × 10 4 cfu / mL.

[0088] Fix the Erlenmeyer flask on a shaking table and shake it at 300 r / min for 1 hour.

[0089] Take 0.5 mL of the shaken sample solution, or the sample solution after appropriate dilution with PBS, and inoculate it into a petri dish using the agar pour method to count the colonies.

[0090] Simultaneously, a control sample group and a no-sample group were set up. The control sample in the control sample group was the same size as the sample but did not contain antibacterial components. All other operating procedures were the same as those in the sample sample group. In the no-sample group, 5 mL of bacterial suspension and 70 mL of PBS were added to a 250 mL Erlenmeyer flask, mixed well, and after 0 time and shaking for 1 hour, 0.5 mL of the bacterial suspension and PBS mixture was taken from each flask and diluted appropriately before colony counting was performed.

[0091] The experiment was repeated three times, and the inhibition rate was calculated using the following formula:

[0092] X5 = (A–B) / A × 100%

[0093] In the formula: X5 — antibacterial rate, %

[0094] A—The average number of colonies in the test sample before shaking;

[0095] B – Average number of colonies after shaking the test sample.

[0096] The colony count in the group without sample was 1 × 10⁻⁶. 4 ~9 × 10 4The test is valid if the cfu / mL level is between 10% and 26%, and the difference in average colony count before and after sample shaking is within 10%. If the difference in inhibition rate between the tested sample group and the control sample group is >26%, the product has antibacterial activity. The antibacterial rate data of the antibacterial guide layer of this invention are shown in Table 1 below:

[0097] Table 1. Antibacterial rate data of the antibacterial guide layer

[0098] strain Staphylococcus aureus ATCC 6538 Escherichia coli 8099 Candida albicans ATCC 10231 Gardnerella vaginalis ATCC 14018 Antibacterial rate ＞99.9 ＞99.9 ＞99.9 ＞99.9 judge It has antibacterial properties It has antibacterial properties It has antibacterial properties It has antibacterial properties

[0099] After adopting a specially developed non-dissolving antibacterial layer, the entire product has no dissolving antibacterial effect on the beneficial bacteria (Lactobacillus curvatureis, Lactobacillus rhamnosus, Lactobacillus casei, Lactobacillus paracasei, Lactobacillus salivarius, Lactobacillus delbrueckii, etc.) on the human private parts and private skin, ensuring that the absorbent product 100 according to this utility model will not damage the beneficial bacteria on the human skin.

[0100] The deodorizing effect of the product can be detected, quantified, and evaluated according to different odor substances. Specifically, for odor substances such as ammonia, the odor intensity can be quantified using the detection tube method to evaluate the deodorizing effect. For example, after cleaning the gas sampling bag, 6L of dilution gas can be added followed by 10µL of ammonia water. The gas sampling bag can be gently tapped first, and then placed in an oven at 37 degrees Celsius for 1 hour. After that, 100mL of gas can be drawn and tested using a detection tube, while a control sample without a sample is prepared.

[0101] For odorous substances such as trimethylamine, the gas sampling bag can be cleaned with nitrogen 2-3 times with the sample, and then the gas sampling bag can be dried. After injecting 6 liters of ammonia into the gas sampling bag, 3 microliters of trimethylamine can be added. The gas sampling bag should be tapped moderately first, and then placed in an oven at 37 degrees Celsius for 1 hour. The gas should be detected with a gas detector and the reading should be taken after it stabilizes. At the same time, a control sample without the sample should be prepared.

[0102] For odorous substances such as isovaleric acid, 1 liter of nitrogen gas can be introduced, and 3.5 μL of isovaleric acid at a concentration of 10 mg / L can be added. The gas collection bag should be tapped gently first, and then placed in an oven at 37 degrees Celsius for 1 hour. Then, Tenax adsorption is used to extract and detect the gas at a rate of 0.1 mL / min. The reading should be taken after the gas stabilizes. At the same time, a control sample without the sample should be prepared.

[0103] By comparing the untreated control sample with the treated product of this utility model using the above method, the deodorization effect data of this utility model is shown in Table 2 below:

[0104] Table 2. Product Deodorizing Effect Data Table

[0105] Odor substances Deodorization rate (%) ammonia 71.4 Trimethylamine 98.8 Isovalerate 80.2

[0106] The improvement in dryness according to this invention was evaluated using the test method for liquid residue as described in Appendix A of standard GB / T 30133—2022 (“Topcoat of Disposable Hygiene Products”), the full text of which is hereby incorporated within the scope of this application.

[0107] Experimental data shows that the liquid content of the dried surface layer is reduced by 45% compared to the untreated control sample (as described below, a 45% increase in dryness). Lower liquid content indicates a drier material. 5ml*3 times of GB artificial menstrual blood solution was injected into both the treated surface layer material and the untreated pure cotton surface layer material according to this invention, and the liquid content of the surface layer was tested.

[0108] The test results are shown in Table 3 below:

[0109] Table 3 Dryness Test Data

[0110] item Untreated surface layer Dry treatment surface layer Liquid content of surface layer - g 1.1 0.6

[0111] Dryness calculation formula:

[0112] =45%

[0113] This demonstrates that the liquid-permeable topsheet layer exhibits a 45% improvement in dryness. Depending on the fiber type and the combination of different hydrophilic and hydrophobic treatments, the liquid-permeable topsheet layer after drying treatment is designed to provide a 30% to 60% improvement in dryness compared to the untreated control sample.

[0114] Previously, embodiments of this utility model have been illustrated and described. However, those skilled in the art should understand that various modifications, omissions, and additions can be made without departing from the spirit and scope of this utility model. It should not be understood as limited to the specific embodiments described herein, but rather encompasses all possible embodiments embodied within the scope and equivalents of the features described in the appended claims.

[0115] The dimensions and values ​​disclosed herein should not be construed as strictly limited to the precise numerical values ​​stated. Rather, unless otherwise specified, each such dimension is intended to represent the value and a range of functionally equivalent values ​​around that value. For example, a dimension disclosed as “40 mm” is intended to represent “approximately 40 mm”.

[0116] All documents referenced in the “Detailed Description” section are incorporated herein by reference in the relevant sections; no reference to any document should be construed as an admission that it is prior art concerning this utility model. In the event of any conflict between the meaning or definition of any term in this written document and the meaning or definition of any term in the referenced documents, the meaning or definition assigned to the term in this written document shall prevail.

[0117] While specific embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that many other changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the appended claims are intended to cover all such changes and modifications within the scope of the present invention.

[0118] When describing elements of the present invention or their preferred embodiments(s), the articles “a,” “an,” “the,” and “the” are intended to indicate the presence of one or more elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that additional elements may be present in addition to the listed elements. Many modifications and variations may be made to the present invention without departing from the spirit and scope thereof. Therefore, the above embodiments are not intended to limit the scope of the present invention.

Claims

1. A female absorbent article having a bacteria-inhibiting function, wherein the female absorbent article extends in a longitudinal direction, a transverse direction and a depth direction, characterized in that include: A liquid-permeable topsheet layer, wherein the topsheet layer comprises a blend of hydrophilic and hydrophobic fibers, wherein the hydrophilic fibers comprise a fiber core and a hydrophilic material layer covering the fiber core; A flow guiding layer located below the top film layer, wherein the flow guiding layer has a first side facing the top film layer and a second side facing away from the top film layer; The impermeable substrate layer located at the bottom of the absorbent article; An absorbent core positioned between the second side of the guide layer and the substrate layer, wherein a portion of the absorbent core is positioned in the central region of the absorbent article to receive liquid seeping down from the guide layer; and An antibacterial layer located on the second side of the flow guide layer, wherein the antibacterial layer is designed to face and cover the portion of the absorbent core located in the central region of the absorbent article, and is a non-leaching antibacterial coating. The absorbent core of the absorbent product has a central protrusion that rises laterally outward from the body to a certain height. The central protrusion is designed to be roughly peanut-shaped with a first width, conforming to the vaginal opening. The antibacterial layer located on the second side of the diversion layer has a second width, which is greater than the first width of the central protrusion.

2. The feminine absorbent article of Claim 1 wherein, It also includes a backing paper layer located between the flow guiding layer and the substrate layer, wherein the backing paper layer surrounds the outer periphery of the absorbent core, wherein the flow guiding layer comprises a blend of first fibers having a first fineness and second fibers having a second fineness interwoven with each other, wherein a void for liquid to seep down is formed near the interlacing point of the first and second fibers, wherein the first fineness is less than the second fineness.

3. A feminine absorbent article according to claim 1 or 2, characterised in that The topsheet layer includes a first side facing the body and a second side facing the clothing, wherein the first side of the topsheet layer includes the hydrophobic fiber, wherein the hydrophobic fiber includes a fiber core and a hydrophobic material layer covering the fiber core, and wherein the second side of the topsheet layer includes the hydrophilic fiber.

4. The feminine absorbent article of Claim 2, wherein the absorbent article is characterized by, The first fiber has a first fineness of about 1 to 6 denier, and the second fiber has a second fineness of 4 to 15 denier.

5. The feminine absorbent article of Claim 2, wherein the absorbent article is characterized by, The voids in the flow guide layer have an average area of ​​0.5 square millimeters to 2.5 square millimeters, and these voids together constitute 6% to 25% of the total area of ​​the flow guide layer's opening area.

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