JP2019118488A - Absorbent article - Google Patents

Abstract

To provide an absorbent article capable of suppressing omission of a non-heat seal fiber in an outside edge of a surface sheet in a width direction.SOLUTION: An absorbent article 1 comprises: a surface sheet (10); and an absorbent core (20) provided on a non-skin facing surface side of the surface sheet. The surface sheet comprises a first surface sheet (11) and a second surface sheet (12) positioned on a non-skin facing surface side of the first surface sheet. The first surface sheet includes non-heat seal fibers. An outside edge (11E) of the first surface sheet in a width direction is arranged on a skin facing surface side of the second surface sheet. There is provided a junction region (RX) in which the first and second surface sheets are jointed. A distance between the junction region and the outside edge of the first surface sheet in a width direction is shorter than a fiber length of the non-heat seal fibers.SELECTED DRAWING: Figure 1

Description

  The present invention relates to absorbent articles such as sanitary napkins.

  Patent Documents 1 and 2 disclose absorbent articles such as sanitary napkins. In the absorbent article of Patent Document 1, a plurality of surface sheets are provided on the skin facing surface side of the absorbent core. A surface sheet has a 1st surface sheet (surface sheet of patent document 1), and a 2nd surface sheet (heat-fusible fiber sheet of patent document 1) which overlaps with a 1st surface sheet in thickness direction. The first top sheet comprises non-heat-fusible fibers.

  Moreover, as for the absorbent article of patent document 2, the surface sheet is folded in the width direction. The folded portion of the top sheet is not joined to the sheet positioned on the non-skin facing surface side of the top sheet, and is configured to be able to stand on the wearer side. The tip of the folded portion is disposed outward in the width direction.

Patent 5074913 gazette JP 10-118118 A

  In the absorbent article of Patent Document 2, the folded back portion is configured to be able to stand on the wearer side, and is disposed between the legs when worn. Therefore, when a wearer walks etc., the tip of the return part of a surface sheet may be rubbed by a wearer's leg. There was a possibility that the fiber which comprises a surface sheet will be missing because a surface sheet is repeatedly dripped by a leg. In particular, in the case of a sheet containing non-heat-bonding fibers as in Patent Document 2, the fibers tend to be more easily detached because the fibers do not have heat-sealing properties.

  Therefore, an absorbent article capable of suppressing the release of non-heat-fusible fibers at the outer edge in the width direction of the topsheet is desired.

  An absorbent article according to one aspect is an absorbent article having a front and back direction, a width direction orthogonal to the front and back direction, a surface sheet, and an absorbent core disposed on the non-skin facing surface side of the surface sheet. The surface sheet is an absorbent article having a first surface sheet and a second surface sheet located on the non-skin-facing side of the first surface sheet, wherein the first surface sheet is The heat-fusible fiber is included, and the outer edge in the width direction of the first top sheet is disposed on the skin-facing surface side of the second top sheet, and the first top sheet and the second top sheet And the distance in the width direction between the bonding area and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat-fusible fiber.

FIG. 1 is a plan view of the absorbent article according to the embodiment viewed from the skin facing surface side. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. FIG. 3 is an enlarged view of a portion B shown in FIG. FIG. 4 is a plan view showing the bonding area and the pressing portion.

(1) Outline of Embodiment At least the following matters will become clear by the description of the present specification and the attached drawings.
An absorbent article according to one aspect is an absorbent article having a front and back direction, a width direction orthogonal to the front and back direction, a surface sheet, and an absorbent core disposed on the non-skin facing surface side of the surface sheet. The surface sheet is an absorbent article having a first surface sheet and a second surface sheet located on the non-skin-facing side of the first surface sheet, wherein the first surface sheet is The heat-fusible fiber is included, and the outer edge in the width direction of the first top sheet is disposed on the skin-facing surface side of the second top sheet, and the first top sheet and the second top sheet And the distance in the width direction between the bonding area and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat-fusible fiber.

  Since the distance in the width direction between the bonding area and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat-fusible fiber, at least a portion of the non-heat-fusible fiber is easily bonded in the bonding area . Therefore, the non-heat-fusible fiber can be held by the bonding area, and the non-heat-fusible fiber can be suppressed from being detached when the outer edge of the first surface sheet is rubbed.

  According to a preferred aspect, the bonding area is provided with a squeezed portion obtained by compressing the first front sheet and the second front sheet.

  According to the squeezing portion, not only the non-skin facing surface side of the first surface sheet and the skin facing surface side of the second surface sheet are joined, but also the first range extending in the thickness direction of the first surface sheet is The surface sheet is easy to be joined. Therefore, the non-heat-fusible fiber is more easily bonded to the second surface sheet in the bonding area.

  According to a preferred aspect, the squeezing portions are arranged at intervals in the front-rear direction or the width direction.

  The rigidity of the outer edge of the first top sheet is reduced as compared with the configuration in which the squeezing portions are continuously arranged, and the outer edge of the first top sheet can easily follow the movement of the leg. Therefore, it is possible to suppress the friction between the outer edge of the first top sheet and the legs, and to prevent the non-heat-fusible fibers of the first top sheet from coming off.

  According to a preferred aspect, the bonding area is provided with an adhesive for bonding the first front sheet and the second front sheet.

  In the configuration in which the first front sheet and the second front sheet are joined by the adhesive, heat and pressure are less likely to be applied to the first front sheet at the time of joining. Therefore, the fracture | rupture of the non-heat-fusible fiber by the heat | fever etc. at the time of joining can be suppressed, and the drop-off | omission of the fiber of a 1st surface sheet can be suppressed more.

  According to a preferred embodiment, the first top sheet comprises heat fusible fibers.

  Since the first surface sheet contains heat fusible fibers, the heat fusible fibers are fused to form a fused portion between the fibers, making it difficult for the non-heat fusible fibers to come off.

  According to a preferred embodiment, the second top sheet comprises heat fusible fibers.

  Since the second surface sheet contains heat fusible fibers, the heat fusible fibers are fused to form fused portions between the fibers, and the non-heat fusible fibers of the first surface sheet are caught by the fused portions. , It becomes difficult to escape.

  According to a preferred aspect, a side sheet covering the outer edge of the absorbent article is disposed on the non-skin-facing side of the second top sheet, and the outer edge of the second top sheet is the second surface sheet. (1) It has a side non-joining area located outside the outer edge of the top sheet in the width direction and in which the outer edge of the second top sheet and the side sheet are not joined.

  The outer edge of the second top sheet is located on the outer side in the width direction than the first top sheet, and stands against the side sheet in the side non-joining area. Therefore, when pinched by the wearer's leg, the outer edge of the second surface sheet strikes the leg earlier than the outer edge of the first surface sheet. It is possible to further prevent the removal of the non-heat-fusible fiber due to the outer edge of the first surface sheet rubbing against the leg.

  According to a preferred aspect, the second surface sheet is folded at a base point along a fold along the front-rear direction, and the fold is provided at an outer edge of the second surface sheet.

  Because the second surface sheet is folded, it is easy to deform the fold to the base point when hitting the wearer's leg. By deforming the second surface sheet, the contact with the first surface sheet can be softened, and the removal of the non-heat-fusible fibers of the first surface sheet can be suppressed.

  According to a preferred aspect, the outer edge of the first surface sheet is positioned inward in the width direction than the outer edge of the absorbent core.

  When pinched by the wearer's leg, the outer edge of the absorbent core tends to hit the leg earlier than the outer edge of the first top sheet. It is possible to further prevent the removal of the non-heat-fusible fiber due to the outer edge of the first surface sheet rubbing against the leg.

(2) Configuration of Absorbent Article Hereinafter, an absorbent article according to the embodiment will be described with reference to the drawings. The absorbent article may be an absorbent article such as a sanitary napkin, panty liner, breast milk pad, adult incontinence pad, fecal pad or sweat sheet. In particular, the absorbent article may be an article attached to and used on the inside of a wearing article such as a user's underwear.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and ratios of dimensions may be different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. In addition, there may be a case where the dimensional relationships and ratios differ among the drawings.

  FIG. 1 is a plan view of the absorbent article 1 according to the first embodiment viewed from the skin facing surface side. Here, the "skin facing surface side" corresponds to the side facing the wearer's skin during use. The "non-skin facing side" corresponds to the side that is turned away from the wearer's skin during use. 2 is a cross-sectional view taken along the line A-A shown in FIG. 1, and FIG. 3 is an enlarged view of a portion B shown in FIG.

  The absorbent article 1 has a longitudinal direction L and a width direction W. The front-rear direction L is a direction extending from the front side (ventral side) to the rear side (back side) of the wearer, or a direction extending from the rear side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L.

  The absorbent article 1 includes a front side area R1, a rear side area R2, and a central area R3. The central region R3 includes an excretion opening abutment portion R33 that faces the excretion opening (for example, the vaginal opening) of the wearer. When the absorbent article 1 is worn on the undergarment, the central zone R3 is located in the crotch of the undergarment. That is, the excretion opening contact portion R33 is a region disposed under the crotch of the wearer, that is, between the legs of the wearer.

  The front side area R1 is located on the front side of the central area R3. The front end edge of the front side area R1 defines the front end edge of the absorbent article 1. The rear region R2 is located rearward of the central region R3. The rear end edge of the rear area R2 defines the rear end edge of the absorbent article 1. The length in the front-rear direction L of the rear region R2 may be longer than the length in the front-rear direction L of the central region R3.

  The central region R3 may be provided with wings 3 described later. In addition, a hip flap 4 that bulges outward in the width direction W may be provided in the rear region R2. The front end edge of the wing 3 is defined by the root of the wing 3 and corresponds to the portion located on the front side among the two portions recessed most in the width direction W. The front end edge of the wing 3 may define the boundary between the central area R3 and the front area R1. The rear end edge of the wing 3 is defined by the root of the wing 3 and corresponds to the portion located on the rear side among the two portions recessed most in the width direction W. The rear end edge of the wing 3 may define the boundary between the central area R3 and the rear area R2.

  The absorbent article 1 includes a top sheet 10 directed to the skin of the wearer, a back sheet 14 directed to the side opposite to the skin of the wearer, and an absorbent core 20 disposed between the top sheet 10 and the back sheet 14. And. The surface sheet 10 is provided on the skin facing surface T1 more than the absorbent core 20. The back sheet 14 is provided closer to the non-skin facing surface T2 than the absorbent core 20. The absorbent core 20 is provided between the top sheet 10 and the back sheet 14.

  The surface sheet 10 is a liquid-permeable sheet that transmits liquid such as body fluid. The surface sheet 10 may cover the central portion of the absorbent core 20 in the width direction W. The surface sheet 10 may extend in the front-rear direction L from the front side region R1 to the rear side region R2. The top sheet 10 may have a first top sheet 11 and a second top sheet 12 located on the non-skin facing side of the first top sheet 11.

The first surface sheet 11 contains non-heat-fusible fibers. The non-heat-fusible fiber can be exemplified by cotton fiber. The first surface sheet 11 is formed by entanglement of non-heat-fusible fibers. The fiber diameter of cotton fibers may be 0.9-1.2 Dtex, and the fiber length of cotton fibers may be 25.4-29.4 mm. The 1st surface sheet 11 can illustrate a cotton nonwoven fabric. The cotton nonwoven fabric may have a basis weight of 30 g / m ² . The first front sheet 11 may have a two-layer structure. More specifically, it may be constituted by a laminated sheet of a 100% cotton fiber upper layer and a 60% cotton fiber and a 40% heat fusible fiber lower layer. The breaking elongation of the first surface sheet 11 may have a strength of 30 to 60 N / 25 mm along the fiber orientation direction, and may have a strength of 5 to 10 N / 25 mm perpendicular to the fiber orientation direction.

  The second top sheet 12 contains heat fusible fibers. The second surface sheet 12 is formed by fusion of heat fusible fibers. The top sheet 10 may further include side sheets 13. The side sheets 13 may extend outward in the width direction of the first front sheet 11 and the second front sheet 12. The side sheets 13 are disposed on the non-skin facing side of the first front sheet 11 and the second front sheet 12 and do not cover the first front sheet 11 and the second front sheet 12.

  The top sheet 10 may further include side sheets 13. The side sheets 13 may extend outward in the width direction of the first front sheet 11 and the second front sheet 12. The side sheet 13 covers the outer edge of the absorbent article. The side sheets 13 are disposed on the non-skin facing side of the first front sheet 11 and the second front sheet 12 and do not cover the first front sheet 11 and the second front sheet 12.

  The back sheet 14 is a liquid impermeable sheet. The back sheet 14 may be a polyethylene sheet, a laminated non-woven fabric mainly made of polypropylene or the like, an air-permeable resin film, a sheet in which an air-permeable resin film is joined to a non-woven fabric such as spunbond or spunlace.

  The absorbent core 20 is disposed at least in the central region R3 and the rear region R2. In addition, the absorbent core 20 may extend from the central region R3 to the front region R1. The absorbent core 20 comprises an absorbent material that absorbs liquid. The absorbent core 20 may be wrapped by a core wrap. The absorbent material that constitutes the absorbent core 20 can be formed of, for example, hydrophilic fibers, pulp and super absorbent polymer (SAP). The core wrap can be composed of, for example, a non-woven fabric or a tissue sheet.

  As mentioned above, the absorbent article 1 has the wings 3 and the hip flaps 4. The wing 3 and the hip flap 4 extend outward in the width direction W than the outer edge of the absorbent core 20 in the central region R3. The wing 3 and the hip flap 4 may be configured by laminating the top sheet 10 and the back sheet 14. The wing 3 is configured to be foldable to the back sheet 14 side. The wing 3 is folded back to the non-skin facing side of the crotch portion of the undergarment when in use.

  The hip flap 4 is located rearward of the wing 3 and is provided in the rear region R2. The hip flap 4 is not folded back at the time of use but is placed between the underwear and the buttocks of the wearer. In the present embodiment, the hip flap 4 is not provided with an absorbent material. Alternatively, the hip flap 4 may be provided with an absorbent material.

  Then, the structure which suppresses the drop-off of the non-heat-fusible fiber of the surface sheet 10 of the absorbent article 1 comprised in this way is demonstrated. Since the outer edge 11E in the width direction of the first surface sheet 11 is disposed on the skin facing surface side of the second surface sheet 12, the outer edge 11E of the first surface sheet 11 may be rubbed by the legs of the wearer when worn is there. Non-heat-fusible fibers do not fuse by heat as compared with heat-fusible fibers, and bonds between the fibers tend to be weak. Therefore, when the first surface sheet 11 including the non-heat-fusible fiber rubs on the leg of the wearer, the non-heat-fusible fiber may be detached. The absorbent article 1 is configured to suppress the removal of the non-heat-fusible fiber in the surface sheet (the first surface sheet 11 in the present embodiment) having the non-heat-fusible fiber.

  In a region where the first front sheet 11 and the second front sheet 12 overlap, a joint area RX where the first front sheet 11 and the second front sheet 12 are joined is provided. The distance between the bonding area RX and the widthwise direction W of the outer edge 11E of the first surface sheet 11 is shorter than the fiber length of the non-heat-fusible fiber. Thus, at least a portion of the non-heat-fusible fiber is bonded in the bonding area RX. The non-heat-fusible fiber can be held by the bonding area RX, and the non-heat-fusible fiber can be prevented from coming off when the outer edge 11E of the first surface sheet 11 is rubbed. In addition, it is preferable that the bonding region RX extends in the front-rear direction L. The bonding area RX is provided over the entire front-rear direction of the first surface sheet 11 so that the non-heat-fusible fiber can be effectively prevented from being detached.

  The bonding area RX may coincide with the outer edge 11E of the first top sheet 11, or may be located inside the outer edge 11E of the first top sheet 11 in the width direction W. In the configuration in which the non-bonding area RY extending inward in the width direction W from the outer edge 11E of the first surface sheet 11 is provided, the width direction W of the bonding area RX and the outer edge 11E of the first surface sheet 11 is The distance is the length in the width direction W of the non-junction region RY.

  Next, the junction region RX will be described in detail. FIG. 4 shows the bonding area RA of the first front sheet 11 and the second front sheet 12 and the pressing portion 18. Actually, the adhesion area RA and the pressing portion 18 overlap in the thickness direction T, but are illustrated as being adjacent in the front-rear direction for convenience of explanation. The joint area RX is an area where the first surface sheet 11 and the second surface sheet 12 are joined, and specifically, an area where the pressing portion 18 and the bonding area RA overlap in the thickness direction T, only the pressing portion 18 It includes an provided area and an area where only adhesion area RA is provided. The non-bonding area RY is an area in which the pressing portion 18 is not provided and the bonding area RA is not provided. In other embodiments, bonding area RX may be formed only by the area provided with the pressing portion, or may be formed only by the area provided with the adhesion area.

  The pressing area 18 obtained by compressing the first front sheet 11 and the second front sheet 12 may be provided in the bonding area RX. The pressing portion 18 not only joins the non-skin facing surface of the first surface sheet 11 to the skin facing surface of the second surface sheet 12, but also extends over a certain range extending in the thickness direction of the first surface sheet 11. The top sheet 11 and the second top sheet 12 can be easily joined. Therefore, the non-heat-fusible fiber is bonded to the second surface sheet 12 in the bonding area RX, and the removal of the non-heat-fusible fiber can be further suppressed.

  Moreover, the pressing parts 18 may be arranged in multiple numbers at intervals in the front-rear direction L or the width direction W. The pressing portion 18 according to the present embodiment extends in the front-rear direction L, and is disposed at an interval in the width direction W. The rigidity of the outer edge 11E of the first surface sheet 11 is lower than that in the configuration in which the pressing portions 18 are continuously disposed, and the outer edge 11E of the first surface sheet 11 follows the movement of the leg. It will be easier. Therefore, the friction between the outer edge 11E of the first surface sheet 11 and the leg can be suppressed, and the non-heat-fusible fibers of the first surface sheet 11 can be suppressed from coming off.

  The bonding area RA may be provided in the bonding area RX. The bonding area RA has an adhesive for bonding the first front sheet 11 and the second front sheet 12. The pressing portion 18 according to the present embodiment extends in the front-rear direction L, and is disposed at an interval in the width direction W. In the configuration in which the first front sheet 11 and the second front sheet 12 are joined by an adhesive, heat and pressure are not easily applied to the first front sheet 11 at the time of joining. Therefore, the fracture | rupture of the non-heat-fusible fiber by the heat | fever etc. at the time of joining can be suppressed, and the omission of the fiber of the 1st surface sheet 11 can be suppressed more. In addition, non-heat-bonding fibers are difficult to be fused by squeezing, and the bonding strength may be low. The adhesive makes it easy to obtain the desired bonding strength.

  In the bonding area RX, both the bonding area RA and the pressing portion 18 may be provided. The bonding area RA secures the bonding strength between the first surface sheet 11 and the second surface sheet, and the pressing portion 18 can bond a predetermined range in the thickness direction of the first surface sheet 11 and the second surface sheet. It is possible to suppress the release of the non-heat-bonding fiber. In addition, the bonding area RX may be provided with the bonding area RA and the pressing portion 18 at different pitches. Specifically, the pitch in the width direction of the bonding region RA may be shorter than the pitch in the width direction of the pressing portion 18 and half the pitch in the width direction of the pressing portion 18. According to such a configuration, the region in which both are overlapped and the region in which the adhesive strength is high, and the region in which only one is disposed, the region in which the adhesive strength is low are provided. It is possible to maintain the bonding state of the non-heat-fusible fiber in the region of high adhesive strength while securing the flexibility of the top sheet in the region of low adhesive strength.

  The first top sheet may also include heat fusible fibers as well as non-heat fusible fibers. Since the first surface sheet contains heat fusible fibers, the heat fusible fibers are fused to form a fused portion between the fibers, making it difficult for the non-heat fusible fibers to come off. Therefore, the heat fusible fiber can be further prevented from coming off.

  The second top sheet 12 may include heat fusible fibers. Since the second surface sheet 12 contains heat fusible fibers, the heat fusible fibers are fused to form a fused portion between the fibers, and the non-heat fusible fibers of the first surface sheet 11 are fused. It is hard to come off and it gets stuck. Therefore, it is possible to further prevent the release of the non-heat-fusible fiber.

  As shown in FIG. 2, the side non-joining area RZ where the outer edge 12E of the second surface sheet 12 and the side sheet 13 are not joined may be provided. The outer edge 12E of the second surface sheet 12 is located on the outer side in the width direction than the first surface sheet 11, and stands up with respect to the side sheet 13 in the side non-joining region RZ. Therefore, when pinched by the wearer's leg, the outer edge 12E of the second surface sheet 12 is easier to hit the leg than the outer edge 11E of the first surface sheet 11. It is possible to further prevent the removal of non-heat-fusible fibers due to the outer edge 11E of the first surface sheet 11 rubbing against the legs.

  A fold line FL extending in the front-rear direction L of the second surface sheet 12 may be formed on the outer edge 12E of the second surface sheet 12. Since the second surface sheet 12 is folded, it is easy to be deformed from the fold line FL as a base point when hitting the wearer's leg. For example, in the configuration in which the folded second surface sheets are not joined to each other, the folded second surface sheet is deformed so as to be separated in the thickness direction, and is deformed inward in the width direction. The deformation of the second surface sheet 12 makes it possible to soften the contact with the first surface sheet 11 and to suppress the removal of the non-heat-fusible fibers of the first surface sheet 11.

  The outer edge 11E of the first surface sheet 11 may be located inside the outer edge 20E of the absorbent core 20 in the width direction W. When pinched by the wearer's leg, the outer edge 20E of the absorbent core 20 is easier to hit the leg than the outer edge 11E of the first surface sheet 11. It is possible to further prevent the removal of non-heat-fusible fibers due to the outer edge 11E of the first surface sheet 11 rubbing against the legs.

  Although the present invention has been described above in detail using the above embodiments, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be embodied as modifications and alterations without departing from the spirit and scope of the present invention defined by the description of the claims. Accordingly, the description in the present specification is for the purpose of illustration and does not have any limiting meaning on the present invention.

  The absorbent article which can control the omission of the non-heat-fusible fiber in the widthwise outer edge of the face sheet can be provided.

1 Absorbent article 11 first surface sheet (surface sheet)
11E outer edge 12 second surface sheet (surface sheet)
12E outer edge 13 side sheet (front sheet)
18 squeezed portion 20 absorbent core 20E outer edge R1 front side region R2 back side region R3 central region RA bonding region RX bonding region RY non-bonding region RZ side non-bonding region

Claims (9)

Front to back,
A width direction orthogonal to the front and back direction;
A front sheet,
An absorbent article comprising: an absorbent core disposed on the non-skin facing side of the surface sheet;
The surface sheet is an absorbent article having a first surface sheet and a second surface sheet located on the non-skin facing surface side of the first surface sheet,
The first top sheet comprises non-heat-fusible fibers,
The widthwise outer edge of the first top sheet is disposed on the skin-facing surface side of the second top sheet,
A joint area where the first front sheet and the second front sheet are joined is provided.
An absorbent article, wherein the distance in the width direction between the bonding area and the outer edge of the first surface sheet is shorter than the fiber length of the non-heat-fusible fiber.   The absorbent article according to claim 1, wherein the bonding area is provided with a pressing portion obtained by compressing the first front sheet and the second front sheet.   The absorbent article according to claim 2, wherein the compressed portions are spaced apart in the front-rear direction or the width direction.   The absorbent article according to any one of claims 1 to 3, wherein an adhesive for bonding the first surface sheet and the second surface sheet is provided in the bonding area.   The absorbent article according to any one of claims 1 to 4, wherein the first surface sheet comprises heat fusible fibers.   The absorbent article according to any one of claims 1 to 5, wherein the second surface sheet comprises heat fusible fibers. A side sheet covering the outer edge of the absorbent article is disposed on the non-skin facing side of the second surface sheet,
The outer edge of the second surface sheet is located outside the widthwise direction than the outer edge of the first surface sheet,
The absorbent article according to any one of claims 1 to 6, having a side non-joining area where the outer edge of the second surface sheet and the side sheet are not joined. The second surface sheet is folded at a base point along the fold along the front-rear direction,
The absorbent article according to claim 7, wherein the folds are provided at the outer edge of the second top sheet.   The absorbent article according to any one of claims 1 to 8, wherein the outer edge of the first surface sheet is positioned inward in the width direction than the outer edge of the absorbent core.

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