CN216798036U

CN216798036U - Absorption core and sanitary towel

Info

Publication number: CN216798036U
Application number: CN202121329516.2U
Authority: CN
Inventors: 盛英; 陈嘉琪; 刘思敏; 张毅
Original assignee: Changzheng Medical Suzhou Co ltd
Current assignee: Changzheng Medical Suzhou Co ltd
Priority date: 2021-06-15
Filing date: 2021-06-15
Publication date: 2022-06-24
Anticipated expiration: 2031-06-15

Abstract

The utility model discloses an absorption core and a sanitary towel, and belongs to the field of sanitary products. The absorbent core of the present invention comprises: a first meltblown layer; an absorption layer; the absorption layer is clamped between the first melt-blown layer and the second melt-blown layer; the second melt-blown layer is combined with the melt-blown fibers of the first melt-blown layer; the sanitary towel comprises the absorbent core, a surface layer and a bottom layer. The absorption layer in the middle of the absorption core body is formed by mixing fluff pulp and SAP, so that the absorption speed is high, the water retention and water locking performance is good, the absorption layer is drier and breathable, the absorption layer does not need to be fixed by hot melt adhesive, the absorption layer is not easy to lump and layer, and the overall hand feeling is optimized; the sanitary towel has good absorption effect, can improve the uncomfortable feeling of sticky surface layer, is more dry and breathable, and can avoid side leakage.

Description

Absorption core and sanitary towel

Technical Field

The utility model relates to the technical field of sanitary products, in particular to an absorption core body and a sanitary towel.

Background

Absorbent articles such as sanitary napkins, paper diapers and the like mainly realize the moisture absorption function through an absorbent core, the performance of the absorbent core directly affects the absorption speed, diffusivity, breathability and the like of the absorbent article, and the quality of the absorbent article is greatly affected.

Among them, sanitary napkins are mainly used during female menstruation to absorb menstrual blood discharged from the female lower body, including blood, exfoliated endometrium, uterine mucus and vaginal secretion, which has viscosity and sometimes contains a few sticky small sheets and sometimes contains dark black blood.

The existing absorption core body is mainly divided into a wood pulp core body and a composite core body; the wood pulp core is mainly prepared by mixing wood pulp and high polymer materials, and the absorption speed is high; the composite core body is mainly formed by clamping a water-absorbing polymer material between two layers of wet strength paper to form a main core body and then wrapping the main core body by adopting dust-free paper.

However, the conventional sanitary napkin and absorbent core have the following problems:

(1) when the existing sanitary towel is used, a plurality of sticky small slices or black blood are attached to the surface and cannot be well absorbed, so that a user feels sticky and uncomfortable and is not beautiful visually;

(2) the existing wood pulp core body is airtight, is easy to generate stuffy feeling during use, and is easy to lump and break after being absorbed, so that the use comfort is influenced;

(3) the existing composite core body has poor diffusivity during absorption, is very easy to have the phenomenon of water absorption high polymer material blockage, and when the liquid amount is suddenly increased, the secretion to be absorbed can not quickly reach the absorption layer, easily flows to the side, has the condition of liquid leakage, easily stains clothes or other articles, and brings trouble to users.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the embodiment of the utility model is as follows: the absorption core body has good water absorption and water retention performance, is drier, and is not easy to stick together and layer.

The second purpose of the embodiment of the utility model is: provides a sanitary napkin which is dry, non-sticky, and more dry when in use, and can avoid side leakage.

In order to achieve one of the purposes, the utility model adopts the following technical scheme:

an absorbent core comprising:

a first meltblown layer;

an absorbing layer;

the first melt-blown layer, the absorption layer and the second melt-blown layer are sequentially stacked; the second meltblown layer is bonded to the first meltblown layer by meltblown fibers to secure the absorbent layer between the first meltblown layer and the second meltblown layer.

Preferably, the first meltblown layer and the second meltblown layer are both hydrophilic meltblown layers.

Preferably, the first melt-blown layer comprises a first pressing part, the absorption layer comprises a second pressing part, and the second melt-blown layer comprises a third pressing part; and the first pressing part, the second pressing part and the third pressing part are combined in a hot pressing mode.

In order to achieve the second purpose, the utility model adopts the following technical scheme:

a sanitary towel comprises the absorption core body of the scheme, and also comprises a surface layer and a bottom layer; the absorbent core is secured between the facing layer and the bottom layer.

Preferably, the surface layer is a non-woven fabric with the denier of more than or equal to 2 denier.

Preferably, the surface layer is provided with a flow guide groove.

Preferably, the absorbent core further comprises a flow guide layer, and the flow guide layer is arranged between the surface layer and the absorbent core.

Preferably, the length direction of the fibers of the flow guide layer is the same as the length direction of the sanitary napkin.

Preferably, the bottom layer is a PE breathable film.

Preferably, the surface layer and the flow guide layer, the flow guide layer and the absorbent core body, and the absorbent core body and the bottom layer are respectively bonded through hot melt adhesives.

The utility model has the beneficial effects that: the absorption core body has the advantages of high water absorption speed, good water retention and water locking performance, dryness and ventilation, no need of adopting hot melt adhesive to fix the absorption layer, difficulty in lumping and layering, and optimized overall hand feeling;

the sanitary towel has good absorption effect, can improve the sticky feeling of the surface layer, is more dry and breathable, and can avoid side leakage.

Drawings

The utility model is explained in more detail below with reference to the figures and examples.

FIG. 1 is an exploded view of an absorbent core according to an embodiment of the utility model;

FIG. 2 is an exploded view of a sanitary napkin according to an embodiment of the present invention;

FIG. 3 is a front view of a sanitary napkin according to an embodiment of the present invention;

FIG. 4 is a schematic view of a back side structure of a sanitary napkin according to an embodiment of the present invention;

in the figure: 10. an absorbent core; 11. a first meltblown layer; 12. an absorbing layer; 13. a second meltblown layer; 20. A surface layer; 21. a flow guide groove; 30. a flow guiding layer; 40. a bottom layer; 50. and (5) pasting the material.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "fixed" are to be understood broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The utility model provides an absorption core body 10, which improves the absorption speed and the water retention performance of the absorption core body 10 by changing the material of an absorption layer 12 and changing the fixing mode of the absorption layer 12, ensures that the absorption core body 10 is dry and comfortable, and is not easy to lump and layer; the absorbent core 10 has better performance and better use experience.

As shown in fig. 1-4, in an embodiment of the absorbent core 10 of the present invention, the absorbent core 10 is applied to a sanitary napkin to increase the absorption speed of menstrual blood, ensure the dryness of the surface layer 20, reduce the sticky feeling during use, and prevent the menstrual blood from leaking out from the side, thereby improving the use experience.

In other embodiments, the absorbent core 10 may also be applied to other absorbent articles such as diapers.

In one embodiment of the absorbent core 10 of the present invention, the absorbent core 10 includes a first meltblown layer 11, an absorbent layer 12, and a second meltblown layer 13, which are laminated in this order; the absorbent layer 12 comprises fluff pulp and SAP; mixing fluff pulp with SAP;

the first meltblown layer 11 is bonded to the second meltblown layer 13 by meltblown fibers to secure the absorbent layer 12 between the first meltblown layer 11 and the second meltblown layer 13.

Wherein, the melt-blown fiber is the fiber sprayed by the melt-blowing equipment; the fluff pulp is a water absorption medium, the fiber of the fluff pulp is long, the strength is good, the softness is good, the fiber of the fluff pulp has a capillary effect, liquid can flow along a fine seam, and the absorption performance and the diffusion performance of the fluff pulp are strong. Sap (super Absorbent polymer), a super Absorbent resin, has water retention properties, can firmly hold water to prevent water from leaking out, and can ensure the dryness of the Absorbent core 10.

In this embodiment, the fluff pulp and the SAP are mixed to form the absorption layer 12, which has both good water absorption performance and good water retention performance, and when being applied to a sanitary napkin, the absorption speed of menstrual blood can be increased, the sticky and side leakage of the surface layer 20 can be improved, and the dryness and comfort can be ensured; secondly, the fluff pulp can fix the SAP, so that the phenomenon of gel blocking of the SAP is avoided, the SAP can exert the water-retaining property to the maximum extent, and the using amount of the SAP can be reduced.

In this embodiment, the absorbent core 10 is formed by sequentially stacking a first meltblown layer 11, an absorbent layer 12, and a second meltblown layer 13, and the materials inside the core are not bonded and fixed by hot melt adhesive, but the three materials are fixed by penetrating, crossing, and bonding fibers between the meltblown layers on both sides of the absorbent layer 12. Because the interior material of absorption core 10 does not adopt the hot melt adhesive to fix, absorption core 10 is softer, and the core is inside not have the hot melt adhesive separation during the use, and the absorption performance is also more outstanding, is difficult to rise to stick together and the layering, has improved the drawback that current absorption core 10 exists. Meanwhile, the absorbing core body 10 of the embodiment also reduces the use of the high-gram-weight dust-free paper, can improve the absorbing performance, optimizes the overall hand feeling, and is lighter, thinner and more breathable.

In one embodiment of the absorbent core 10 of the present invention, the first meltblown layer 11 and the second meltblown layer 13 are meltblown. The meltblown fabric is formed by drawing a polymer melt stream extruded from a spinneret orifice with a high velocity stream of hot air to form ultrafine fibers which are collected on a condensing screen or roller and bonded to itself. The melt-blown fabric is formed by randomly distributing and sticking polypropylene superfine fibers with the diameter of 1-5 microns together, and has white and flat appearance and soft hand feeling. Adopt the melt-blown fabric as first melt-blown layer 11 and second melt-blown layer 13 for the material in the absorption core 10 can combine fixedly through the melt-blown fibre, need not to use the hot melt adhesive, and there is not hot melt adhesive in the inside of absorption core 10.

In an embodiment of the absorbent core 10 of the present invention, in order to ensure the absorption effect of the absorbent core 10, the first meltblown layer 11 and the second meltblown layer 13 are subjected to a hydrophilic treatment, so that the first meltblown layer 11 and the second meltblown layer 13 are hydrophilic, and moisture can rapidly enter the absorbent layer 12 through the meltblown layers.

In an embodiment of the absorbent core 10 of the present invention, in order to ensure the fixing effect of the materials in the absorbent core 10 and prevent fluff pulp or SAP in the absorbent layer 12 from shifting and lumping, the multiple layers of materials in the absorbent core 10 are pressed together at the hot pressing position by using a hot pressing process. Wherein, can be for carrying out the pressfitting according to certain line, also can multiple spot pressfitting.

In this embodiment, the first meltblown layer 11 includes a first bonding portion, the absorption layer 12 includes a second bonding portion, the second meltblown layer 13 includes a third bonding portion, and the first bonding portion, the second bonding portion and the third bonding portion are pressed and bonded by a hot pressing process to form the bonding portions. So, can guarantee after the material in the absorbed layer 12 absorbs water the inflation, the pressfitting portion carries on spacingly to expanded material, avoids shifting to rise to stick together, promotes to use and experiences.

The utility model also provides a sanitary towel which is more breathable and dry when in use, and can avoid the stickiness of the surface layer 20 and the side leakage.

In one embodiment of the sanitary napkin of the present invention, as shown in fig. 1-4, the sanitary napkin comprises the absorbent core 10 of the previous embodiment, and further comprises a facing layer 20 and a backsheet 40; the surface layer 20, the absorbent core 10 and the bottom layer 40 are sequentially stacked, and the absorbent core 10 is fixed between the surface layer 20 and the bottom layer 40.

The sanitary napkin of the present embodiment has the absorbent core 10, which has good water absorption and retention properties, and can rapidly absorb menstrual blood, improve the sticky and greasy discomfort of the surface layer 20, make the sanitary napkin more dry and breathable, and avoid side leakage.

In the conventional sanitary napkin, in order to ensure soft hand feeling, the surface layer 20 is made of hot air non-woven fabric with smaller denier, and the smaller the denier of the fiber is, the thinner the fiber is, and the smaller the inter-fiber pores are; therefore, when the conventional sanitary napkin is used, substances with relatively high viscosity, such as cervical mucus and vaginal secretion, are easy to adhere to the surface layer 20 and are not easy to be absorbed by the absorbent core body 10, so that sticky and uncomfortable skin feeling can be generated during use, and the visual appearance is also uncomfortable.

Where denier is the unit of commercial weight referred to as "denier" or "denier", expressed in grams by weight of 9000m of a fiber length. The finer the fiber, the smaller the denier. The relationship between denier and metric is: denier × metric number 9000.

In one embodiment of the sanitary napkin of the present invention, in order to avoid the sticky and non-exuding secretion in menstrual blood, the secretion can be absorbed by the absorbent core 10 more quickly and the secretion can be prevented from remaining on the face layer 20, and the face layer 20 is a hot air non-woven fabric with a denier of 2.0 or more.

In this embodiment, the thick-denier hot-air non-woven fabric is adopted, so that the pores between the fibers of the surface layer 20 are enlarged, the liquid leakage speed of the surface layer 20 is accelerated, the liquid retention between the fibers of the surface layer 20 is reduced, and sticky substances in menstrual blood can quickly permeate into the absorbent core 10 from the surface layer 20; therefore, the sanitary towel of this embodiment, when using, surface course 20 does not have remaining glutinous greasy matter almost, can guarantee to the utmost that surface course 20 is dry and comfortable, reduces secretion and user's skin and contacts, promotes to use the skin feel, reduces glutinous greasy skin feel, also is more comfortable in the vision during the use simultaneously to promote and use experience and feel.

In one embodiment of the sanitary napkin of the present invention, in order to increase the fiber denier of the face layer 20 and ensure the soft touch of the face layer 20 and the comfort of the skin, the hot air non-woven fabric of the face layer 20 is subjected to a fine touch treatment to provide a soft touch. The soft or hard degree that hot-blast non-woven fabrics cloth needs can be adjusted through control temperature at the in-process of production non-woven fabrics, and the cloth that the high temperature was made is softer. The cloth made at low temperature is hard.

The surface layer 20 in this embodiment adopts the hot-blast non-woven fabrics of thick denier and refines the handle to it, makes surface layer 20 both have better permeability, avoids gluing greasy, can keep soft sense of touch again.

Also, since the lower the denier, the higher the cost of the nonwoven material, the finer the fibers, the higher the denier of the nonwoven fabric of the facing layer 20 in this embodiment relative to the nonwoven fabric of the existing facing layer 20, which reduces the manufacturing cost of the sanitary napkin and optimizes performance.

In an embodiment of the sanitary napkin of the present invention, in order to improve the fluid conductivity of the surface layer 20 and enable menstrual blood to be uniformly absorbed, so as to ensure that menstrual blood can be rapidly diffused and infiltrated when tidal surge menstrual blood volume is large, thereby avoiding discomfort caused by accumulation of menstrual blood, the surface layer 20 of the sanitary napkin is further provided with a fluid guiding groove 21.

In this embodiment, the diversion groove 21 is used for providing liquid diversion and water locking functions.

The guide grooves 21 may be formed by hot pressing.

The shape and size of the embossings are not limited in the present invention, as long as they provide the air-guiding property. The embossing may be ring-shaped, rectangular, flower-shaped, etc.

In one embodiment of the sanitary napkin of the present invention, a fluid guiding layer 30 is disposed between the cover 20 and the absorbent core 10 to increase the liquid infiltration speed, prevent the cover 20 from being sticky, ensure a dry and breathable feeling, and prevent a stuffy feeling.

In the present embodiment, the fluid-guiding layer 30 is fixed between the facing layer 20 and the absorbent core 10, and the fluid-guiding layer 30 is made of a nonwoven fabric of coarse denier fibers, which has larger fiber gaps, so as to ensure that liquid can smoothly permeate from the facing layer 20 to the absorbent core 10.

In one embodiment, the fluid conducting layer 30 has a fiber denier of greater than 2.0 denier.

In one embodiment of the sanitary napkin of the present invention, in order to allow menstrual blood to pass through the fluid guiding layer 30 after flowing out of the human body, and to allow rapid diffusion and rapid infiltration, the fluid guiding layer 30 is configured as follows: the fiber orientation is a longitudinal alignment, i.e., the length direction of the fibers of the fluid-directing layer 30 is configured to be the same as the length direction of the sanitary napkin. Therefore, after menstrual blood flows out of a human body and flows to the diversion layer 30 through the surface layer 20, the menstrual blood can be longitudinally diffused under the guidance of the diversion fibers and flows to the front side and the rear side of the sanitary towel, the menstrual blood is uniformly diffused everywhere, the rapid infiltration of the menstrual blood can be realized, and the problem that the menstrual blood is accumulated in one place and cannot be rapidly infiltrated is avoided.

In this embodiment, the guiding layer 30 is used to help the surface layer 20 to rapidly permeate and diffuse, and can effectively separate the core from the surface layer 20, so that the absorbent core 10 can keep the surface layer 20 dry after absorbing liquid, thereby improving the use experience.

In one embodiment of the sanitary napkin of the present invention, the backsheet 40 is a breathable PE film.

The breathable PE film in this embodiment includes a plurality of recessed holes.

The breathable PE film in the embodiment is composed of PE and CaCO3, a certain number of micropores are formed after tape casting and unidirectional or bidirectional stretching, and the distribution density of the micropores is high, so that the bottom layer 40 has waterproofness and moisture permeability, and only the breathable body does not leak liquid; therefore, the sanitary towel is more breathable, the stuffy feeling is reduced, and the use is more comfortable.

In an embodiment of the sanitary towel according to the utility model, further comprising an adhesive material 50, the adhesive material 50 is arranged on the side of the bottom layer 40 facing away from the absorbent core 10 and is intended to be adhered to the pants of the user in order to secure the sanitary towel.

In this embodiment, the adhesive material 50 is a back adhesive.

The shape and arrangement of the back adhesive are not limited in the present invention, as long as the sanitary napkin can be fixed.

In one embodiment of the sanitary napkin of the present invention, the layers of material within the sanitary napkin are bonded together by hot melt adhesives.

In this embodiment, the surface layer 20 and the flow guide layer 30, the flow guide layer 30 and the absorbent core 10, and the absorbent core 10 and the bottom layer 40 are respectively bonded by hot melt adhesives.

In one embodiment of the sanitary napkin, a hot melt adhesive layer is arranged between the materials in the sanitary napkin, the hot melt adhesive layer is formed by solidifying hot melt adhesive, and the hot melt adhesive layer is in a spiral shape. When the sanitary towel is manufactured, the hot melt adhesive adopts a spiral adhesive spraying gluing mode, so that the consumption of the hot melt adhesive can be reduced, and the manufacturing cost is reduced.

In the description herein, it is to be understood that the terms "upper", "lower", "left", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings, and are used for convenience of description and simplicity of operation only, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. An absorbent core, comprising:

a first meltblown layer (11);

an absorption layer (12);

the first melt-blown layer (11), the absorption layer (12) and the second melt-blown layer (13) are sequentially stacked; the second meltblown layer (13) is bonded to the first meltblown layer (11) by meltblown fibers to secure the absorbent layer (12) between the first meltblown layer (11) and the second meltblown layer (13).

2. The absorbent core according to claim 1, wherein the first meltblown layer (11) and the second meltblown layer (13) are both hydrophilic meltblown layers.

3. The absorbent core according to claim 1, wherein the first meltblown layer (11) comprises a first bond, the absorbent layer (12) comprises a second bond, and the second meltblown layer (13) comprises a third bond; and the first pressing part, the second pressing part and the third pressing part are combined in a hot pressing mode.

4. A sanitary napkin comprising an absorbent core (10) according to any one of claims 1 to 3, further comprising a topsheet (20) and a backsheet (40); the absorbent core (10) is secured between the facing layer (20) and the bottom layer (40).

5. A sanitary napkin according to claim 4, wherein the facing layer (20) is a nonwoven having a denier of greater than or equal to 2.

6. A sanitary towel according to claim 4, characterized in that the surface layer (20) is provided with flow-directing grooves (21).

7. A sanitary napkin according to any one of claims 4-6, further comprising a flow-directing layer (30), said flow-directing layer (30) being disposed between said facing layer (20) and said absorbent core (10).

8. A sanitary napkin according to claim 7, wherein the length direction of the fibers of the flow directing layer (30) is the same as the length direction of the sanitary napkin.

9. A sanitary napkin according to any one of claims 4 to 6, wherein said backsheet (40) is a PE breathable film.

10. A sanitary napkin according to claim 7, wherein the surface layer (20) and the flow-directing layer (30), the flow-directing layer (30) and the absorbent core (10), and the absorbent core (10) and the backsheet (40) are bonded by hot melt adhesives, respectively.