CN218607086U - Absorption core body - Google Patents

Abstract

The utility model provides an absorbing core body, which comprises a wrapping layer and an absorbing layer; the absorption layer comprises a first absorption layer, a supporting layer and a second absorption layer which are sequentially arranged from top to bottom; the area of the second absorption layer is smaller than that of the first absorption layer; the first absorbent layer comprises a first absorbent core, a second absorbent core, and a third absorbent core; the second absorbent core is positioned between the first absorbent cores; the second absorption core is composed of a plurality of strip-shaped structures, and every two adjacent strip-shaped structures are parallel to each other; the first absorption core and the third absorption core are provided with diversion holes; the aperture of the first absorption core diversion hole is larger than that of the third absorption core diversion hole. The absorption core body in the utility model has the advantages of fast liquid absorption speed, good dryness, comfort, ventilation and difficult fault occurrence.

Description

Absorption core body

Technical Field

The utility model relates to the technical field of sanitary products, in particular to an absorption core body which can be applied to sanitary towels or menstrual-period trousers.

Background

The sanitary towel is a necessary sanitary article for the menstrual period of women, and the traditional sanitary towel generally comprises a liquid-permeable surface layer, a liquid-impermeable bottom layer and an absorption core body positioned between the liquid-permeable surface layer and the liquid-impermeable bottom layer; the absorbent core is usually made of a wrapping layer made of materials such as toilet paper or dust-free paper, and the like, and the wrapping layer wraps a mixture of fluff pulp and super absorbent resin, so that the sanitary towel usually has the following defects in the use process: on one hand, the whole sanitary towel is very thick and heavy due to the higher gram weight of the absorption core body, has poorer air permeability and is easy to breed bacteria, so that a user can feel sultry and has poorer comfort and is very unfavorable for the body health of the user; on the other hand, when a user wears the sanitary towel for activity, a twisting force is applied to the sanitary towel, the absorption core body expands after absorbing a large amount of liquid, and the absorption core body bears different extrusion or pulling forces, so that the absorption core body is easy to agglomerate, break or roll, and further uncomfortable feeling is brought to the user; in addition, the existing absorption core body is difficult to deeply guide liquid and has poor air permeability. Therefore, an absorbent core with good air permeability, excellent liquid absorption performance, less possibility of generating faults and good comfort and dryness needs to be researched to overcome the defects in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and aims to provide an absorption core body which has high liquid absorption speed, good dryness and comfort, is breathable and is not easy to generate faults.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: an absorbent core, characterized by: the absorbent core comprises a wrapping layer and an absorbent layer; the absorption layer comprises a first absorption layer, a supporting layer and a second absorption layer which are sequentially arranged from top to bottom; the area of the second absorption layer is smaller than that of the first absorption layer; the first absorbent layer comprises an absorbent first absorbent core, a second absorbent core, and a third absorbent core; the second absorbent core is positioned between the first absorbent core and the third absorbent core; the second absorption core is composed of a plurality of strip-shaped structures, and every two adjacent strip-shaped structures are parallel to each other; the first absorption core and the third absorption core are provided with diversion holes; the aperture of the first absorption core diversion hole is larger than that of the third absorption core diversion hole.

Preferably, the hole pattern of the diversion hole is at least one of a circle, a square, a diamond or a flower.

Preferably, in the first absorption core, the aperture of the diversion holes is 1-10 mm, and the distribution density of the diversion holes is 50-250 per m ² 。

Preferably, in the third absorbent core, the pore diameter of the diversion holes is 1-5 mm, and the distribution density of the diversion holes is 50-400 per m ² 。

Preferably, the pore size of the third absorbent core flow-directing pores is not less than 1/3 of the pore size of the first absorbent core flow-directing pores.

Preferably, the strip-like structures are arranged along the length direction of the absorbent core.

Preferably, the width of the strip-shaped structure is 0.5-2 cm; the interval between two adjacent strip structures is 1/5-1/3 of the width of the strip structure.

Preferably, the thickness of the supporting layer is 2-5 mm; a punching structure is arranged on the supporting layer; the hole pattern of the punching structure is at least one of a circle, an ellipse or a rhombus.

Preferably, the aperture of the perforating structure is 1-8 mm, and the hole density of the perforating structure is 100-200/m ² 。

Preferably, the length of the second absorption layer is 1/8-1/5 of the length of the first absorption layer; the width of the third absorption layer is 1/5-1/3 of the width of the first absorption layer.

The first absorption core is wood pulp spunlace non-woven fabric; the strip-like structure in the second absorbent core is a super absorbent resin; the third absorption core is a terylene viscose spunlace non-woven fabric.

Compared with the prior art, the utility model following beneficial effect has at least:

(1) The absorption core body of the utility model comprises a first absorption layer, a supporting layer and a second absorption layer, wherein a diversion trench is formed between two adjacent strip-shaped structures in the first absorption layer, when a large amount of liquid seeps down to the absorption core body, the diversion layer in the first absorption layer and the diversion holes in the first absorption layer are mutually matched, so that partial liquid can be quickly absorbed, and the liquid can be quickly conducted and seeped down to the supporting layer and the second absorption layer, thereby ensuring that the dryness of the product is better;

(2) The supporting layer is arranged between the first absorption layer and the second absorption layer, the supporting layer can not only quickly transmit the liquid which is not absorbed by the first absorption layer to the second absorption layer, so as to ensure the dryness of the surface layer, but also enhance the laminating degree of the absorption core body, and simultaneously, the shaping of the absorption core body is better, the absorption core body still has better softness after imbibition, and the comfort is better;

(3) The utility model discloses well absorption core adopts three layer construction, mutually cooperates between each layer, not only can make each layer exert respective effect respectively, realizes absorbing the maximize of core utilization ratio, can make the travelling comfort of product better moreover, effectively avoids the problem of traditional easy fault of absorption core.

Drawings

Fig. 1 is a schematic structural view of an absorbent core provided by the present invention;

fig. 2 is a schematic structural view of a second absorbent core in the absorbent core provided by the present invention;

fig. 3 is a schematic structural view of a first absorbent core and a third absorbent core of the absorbent core provided by the present invention;

in the figure: 100: an absorbing layer; 200: a wrapping layer; 101: a first absorbent layer; 102: a support layer; 103: a second absorbent layer; 1011: a first absorbent core; 1012: a second absorbent core; 1013: a third absorbent core; a: and (4) a strip structure.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention and the accompanying drawings are combined below to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, rather than all embodiments, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention.

In order to solve a series of problems of the absorption core in the prior art, the present invention provides an absorption core, as shown in fig. 1 and 2, the absorption core comprises a wrapping layer 200 and an absorption layer 100; the absorption layer 100 comprises a first absorption layer 101, a support layer 102 and a second absorption layer 103 which are sequentially arranged from top to bottom; the supporting layer is arranged between the first absorption layer and the second absorption layer, on one hand, partial liquid can be isolated, the liquid which cannot be absorbed in the first absorption layer is prevented from reversely permeating to the surface layer to generate a damp feeling, on the other hand, the softness and the fluffy degree of the absorption core body can be increased, and the close-fitting and comfortable product can be ensured; the area of the second absorption layer is smaller than that of the first absorption layer; in the utility model, the first absorption layer and the supporting layer have the same area, and when a large amount of liquid seeps down to the absorption core body in the using process, the liquid can preferentially pass through the first absorption layer, on one hand, part of the liquid can be quickly diffused and absorbed in the first absorption layer, on the other hand, the liquid which is not absorbed can be quickly seeped down to the supporting layer, and the supporting layer conducts and diffuses the liquid, so that the liquid is completely absorbed in the second absorption layer; because the liquid is mainly gathered in the middle of the absorption core body, the area of the second absorption layer is smaller than that of the first absorption layer, and the utilization rate of the absorption core body can be maximized; the first absorbent layer 101 comprises a first absorbent core 1011, a second absorbent core 1012 and a third absorbent core 1013; the second absorbent core 1012 is positioned between the first absorbent core 1011 and the third absorbent core 1013; the second absorbent core 1012 is composed of a plurality of strip-like structures a, and adjacent two strip-like structures are parallel to each other; the first absorption core 1011 and the third absorption core 1013 are both provided with flow guide holes; as shown in fig. 3, the first absorbent core 1011 flow-directing pores have a larger pore size than the third absorbent core 1013 flow-directing pores; the utility model discloses in, the second absorbs the core and is formed along the strip structure that absorbs the length direction formation of core by a plurality of super absorbent resin, form the water conservancy diversion slot between two adjacent strip structures, cooperate the water conservancy diversion hole on first absorption core and the third absorption core simultaneously, not only can make first absorption layer have certain imbibition ability, and the liquid guide performance and the performance of diffused liquid are better, when a large amount of liquid oozes to absorbing the core down, some liquid can be absorbed and spread fast on first absorption layer, and in time conduct another part of liquid to supporting layer and second absorption layer, thereby effectively avoid taking place the weeping phenomenon; and the setting of list structure can guarantee the super absorbent resin in the first absorbed layer after imbibition inflation, still has the hole between two adjacent list structure, can guarantee that the unable liquid that absorbs in time infiltrates to effectively avoid making the relatively poor problem of dry and comfortable nature of top layer because of liquid gathering on first absorbed layer.

According to some preferred embodiments, the hole pattern of the diversion holes is at least one of a circle, a square, a diamond or a flower; it should be noted that, in the present invention, at least one is any one or a mixture of any several of them mixed in any ratio.

According to some preferred embodiments, the first absorbent core 1011 has a flow guide hole diameter of 1 to 10mm (for example, 1mm, 3mm, 5mm, 6mm, 8mm or 10mm may be used), and the distribution density of the flow guide holes is 50 to 250 pieces/m ² (for example, it may be 50/m ² 70 pieces/m ² 90 pieces/m ² 100 pieces/m ² 130, 130/m ² 150/m ² 180 pieces/m ² 200 pieces/m ² Or 250/m ² )。

According to some preferred embodiments, the third absorbent core 1013 has a flow guide hole diameter of 1 to 5mm (for example, 1mm, 2mm, 3mm, 4mm or 5 mm) and a distribution density of 50 to 400 flow guide holes/m ² (for example, it may be 50/m ² 100 pieces/m ² 150/m ² 200 pieces/m ² 250 pieces/m ² 300 pieces/m ² 350 pieces/m ² Or 400/m ² ) (ii) a In the utility model, the first absorption coreAnd the third absorption core is provided with the diversion holes with proper shapes and sizes, so that the liquid guiding performance of the first absorption layer can be further enhanced, and simultaneously, the diversion holes on the first absorption core are preferably larger than the diversion holes of the third absorption core, and the distribution density of the diversion holes in the third absorption core is larger than the distribution density of the diversion holes in the first absorption core, so that the liquid guiding performance of the first absorption layer can be enhanced, and the reverse osmosis of liquid in the supporting layer can be effectively prevented, and further, the dry and comfortable performance of the surface layer is better.

According to some preferred embodiments, the pore size of the flow-directing pores of the third absorbent core 1013 is not less than 1/3 of the pore size of the flow-directing pores of the first absorbent core 1011; the utility model discloses in, the aperture in first absorption core water conservancy diversion hole is more preferably, and the aperture in third absorption core water conservancy diversion hole is not less than 1/3 in the aperture in first absorption core water conservancy diversion hole except being greater than the aperture in third absorption core water conservancy diversion hole, so can make the drain performance of first absorbed layer with prevent that the reverse osmosis performance is best.

According to some preferred embodiments, the strip-shaped structures a are arranged along the length direction of the absorption core, so that liquid in the first absorption layer can be diffused and absorbed along the length direction of the first absorption layer, and the situations of liquid leakage and poor utilization rate of the absorption core caused by poor diffusion performance of the existing absorption core are effectively avoided.

According to some more preferred embodiments, the width of the stripe structures a is 0.5 to 2cm (e.g., may be 0.5cm, 0.8cm, 1cm, 1.3cm, 1.5cm, 1.8cm, or 2 cm); the interval between two adjacent strip structures A is 1/5-1/3 (for example, 1/5, 1/4 or 1/3) of the width of the strip structure; the utility model discloses in, the list structure bonds after mixing for super absorbent resin and structural adhesive between first absorption core and second absorption core, in order on guaranteeing the better basis of list structure adhesion, further to guarantee the imbibition performance of list structure, the utility model discloses the mixed quality ratio that well absorbent resin and structure were glued can be (20 ~ 50): 1, when the width of the strip-shaped structure and the interval between adjacent strip-shaped structures meet the range, the first absorption layer can be ensured to have better liquid absorption performance and liquid guiding performance; if the width of the strip-shaped structure is larger than the range or the interval between the adjacent strip-shaped structures is smaller than the range, the interval of the diversion trench between the adjacent strip-shaped structures is reduced after the strip-shaped structures absorb and expand, and further the infiltration speed of the liquid is reduced; if the width of the stripe structures is less than the above range or the interval between adjacent stripe structures is greater than the above range, the number of stripe structures needs to be correspondingly reduced, thereby adversely affecting the liquid absorption performance of the first absorption layer.

According to some preferred embodiments, the thickness of the support layer 102 is 2-5 mm (e.g. 2mm, 2.5mm, 3mm, 3.5mm, 4mm or 5 mm), the present invention uses a hot-air non-woven fabric as the support layer, and the gram weight of the hot-air non-woven fabric is 18-40 g/m ² The thickness of the supporting layer is controlled within the range, so that the supporting layer can play a good supporting role, the absorption core body is not easy to break after imbibing, liquid can be better diffused in the absorption core body, and the utilization rate of the absorption core body is effectively improved; the supporting layer is fluffy and soft, so that the use comfort can be greatly improved; if the thickness of supporting layer is less than when above-mentioned scope, then can make the supporting effect variation of supporting layer behind the absorption core imbibition, although increase the thickness of supporting layer can strengthen the supporting effect and the imbibition performance of supporting layer, the supporting layer is not the better more, then can make its compliance variation along with the increase of supporting layer thickness, and then makes the travelling comfort of absorption core reduce.

According to some preferred embodiments, a perforated structure is provided on the support layer 102; the hole pattern of the punching structure is at least one of a circle, an ellipse or a rhombus; set up the drain performance that the structure of punching not only can further strengthen the supporting layer on the supporting layer, can also increase the gas permeability of absorbing the core to further increase user's comfort level.

According to some preferred embodiments, the perforation structure has a pore size of 1 to 8mm (e.g. may be 1mm, 3mm, 5mm or 8 mm) and the perforation structure has a pore density of 100 to 200 pores/m ² (for example, it may be 100/m ² 120 pieces/m ² 150/m ² 、180Per m ² Or 200/m ² )。

According to some preferred embodiments, the length of the second absorbent layer 103 is 1/8 to 1/5 (e.g., may be 1/8, 7/1, 6/1, or 1/5) of the length of the first absorbent layer 101; the width of the third absorption layer 103 is 1/5 to 1/3 (for example, 1/5, 1/4 or 1/3) of the width of the first absorption layer 101; the second absorption layer is wet-made super absorbent resin absorbent paper, wherein the gram weight of the absorbent paper is 60-120 g/m ² The content of the super absorbent resin is 20 to 40 percent of the gram weight of the absorbent paper; the utility model discloses in, the second absorbed layer is formed by folding the high water absorption resin absorbent paper the same with first absorbed layer and supporting layer area for the area of second absorbed layer is less than first absorbed layer and supporting layer, not only can further increase the imbibition performance of absorbing the core intermediate position, can greatly promote the utilization ratio of absorbing each absorbed layer of core moreover.

According to some preferred embodiments, the first absorbent core 1011 is a wood pulp spunlace nonwoven fabric obtained by adding a layer of wood pulp in the production of the spunlace fabric, and the gram weight of the wood pulp spunlace fabric is 25-45 g/m ² (ii) a The strip-shaped structure A in the second absorbent core 1012 is super absorbent resin, the liquid retention capacity of the super absorbent resin is more than 30g/g, and the particle size distribution range of the super absorbent resin is 35-80 meshes; the third absorption core 1013 is a terylene viscose spunlace non-woven fabric which is prepared by taking terylene, viscose fiber and other raw materials as main materials, and has the advantages of softness, good drapability, good strength, high hygroscopicity and high moisture absorption, and the gram weight of the terylene viscose spunlace fabric is 20-40 g/m ² (ii) a The addition amount of the high water-absorbing resin in the strip-shaped structure in the first absorption layer is 80-100 g/m ² (ii) a Because the spunlace non-woven fabric has the characteristics of softness, good liquid absorption performance and good dryness, the spunlace non-woven fabric is adopted to wrap the super absorbent resin, so that the product is soft, the comfort level of the attached body is high, and almost no wearing feeling is caused; and simultaneously, the utility model provides an absorb the core still includes the parcel layer, and the parcel layer is used for wrapping up first absorption layer, supporting layer and second absorption layer entirely or partly for absorb the coreDisplacement is not easy to occur between each layer of the body, and the wrapping layer can be made of super absorbent resin absorbent paper or spun-bonded non-woven fabric.

In the present invention, in fig. 1 and fig. 2, the structural layers are mutually peeled off, which is a clear indication of the position relationship between the structural layers, and it should be understood that the present invention is actually closely attached and/or partially attached between the structural layers.

In order to more clearly illustrate the technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.

Example 1

An absorption core body comprises a wrapping layer (spun-bonded non-woven fabric) and an absorption layer, wherein the absorption layer comprises a first absorption layer, a supporting layer (hot air non-woven fabric) and a second absorption layer (super absorbent resin absorbent paper, the gram weight of the first absorption layer is 100g/m ² 35% superabsorbent resin content); wherein the thickness of the supporting layer is 4mm, a circular perforation structure with the aperture of 4mm is arranged on the supporting layer, and the distribution density is 150 pieces/m ² (ii) a The length of the second absorption layer is 1/7 of the length of the first absorption layer, and the width of the second absorption layer is 1/4 of the width of the first absorption layer; the first absorption layer comprises a first absorption core (wood pulp spunlace non-woven fabric), a second absorption core (high water absorption resin) and a third absorption core (viscose terylene spunlace non-woven fabric), the second absorption core is positioned between the first absorption core and the third absorption core, the second absorption core is composed of a plurality of strip-shaped structures with the width of 1cm and the interval of 0.25cm, the two adjacent strip-shaped structures are parallel to each other, and the addition amount of the high water absorption resin in the strip-shaped structures in the first absorption layer is 90g/m ² (ii) a Circular diversion holes are formed in the first absorption core and the third absorption core; the aperture of the diversion holes of the first absorption core is 6mm, and the distribution density of the diversion holes is 100/m ² (ii) a The diameter of the diversion holes of the third absorption core is 2mm, and the distribution density of the diversion holes is 150 per m ² 。

Example 2

An absorption core body comprises a wrapping layer (spun-bonded non-woven fabric) and an absorption layer, wherein the absorption layer comprises a first absorption layer and a supporting layer (heat) which are sequentially arranged from top to bottomWind non-woven fabric) and a second absorbent layer (super absorbent resin absorbent paper with a grammage of 60g/m ² 35% superabsorbent resin content); wherein the thickness of the supporting layer is 2mm, an oval punching structure with the aperture of 2mm is arranged on the supporting layer, and the distribution density is 100 pieces/m ² (ii) a The length of the second absorption layer is 1/8 of the length of the first absorption layer, and the width of the second absorption layer is 1/5 of the width of the first absorption layer; the first absorption layer comprises a first absorption core (wood pulp spunlace non-woven fabric), a second absorption core (high water absorption resin) and a third absorption core (viscose polyester spunlace non-woven fabric), the second absorption core is positioned between the first absorption core and the third absorption core, the second absorption core comprises a plurality of strip-shaped structures with the width of 0.8cm and the interval of 0.16cm, the two adjacent strip-shaped structures are parallel to each other, and the addition amount of the high water absorption resin in the strip-shaped structures in the first absorption layer is 90g/m ² (ii) a Rhombic diversion holes are formed in the first absorption core and the third absorption core; the aperture of the diversion holes of the first absorption core is 6mm, and the distribution density of the diversion holes is 50/m ² (ii) a The aperture of the diversion holes of the third absorption core is 2mm, and the distribution density of the diversion holes is 100/m ² 。

Example 3

An absorbing core body comprises a wrapping layer (high water-absorbing resin absorbent paper) and an absorbing layer, wherein the absorbing layer comprises a first absorbing layer, a supporting layer (hot air non-woven fabric) and a second absorbing layer (high water-absorbing resin absorbent paper with a gram weight of 120g/m which are sequentially arranged from top to bottom ² 30% superabsorbent resin content); wherein the thickness of the supporting layer is 5mm, a diamond-shaped punching structure with the aperture of 5mm is arranged on the supporting layer, and the distribution density is 200 pieces/m ² (ii) a The length of the second absorption layer is 1/5 of the length of the first absorption layer, and the width of the second absorption layer is 1/3 of the width of the first absorption layer; the first absorption layer comprises a first absorption core (wood pulp spunlace non-woven fabric), a second absorption core (high water absorption resin) and a third absorption core (viscose polyester spunlace non-woven fabric), the second absorption core is positioned between the first absorption core and the third absorption core, the second absorption core comprises a plurality of strip-shaped structures with the width of 2cm and the interval of 0.3cm, the two adjacent strip-shaped structures are parallel to each other, and the addition amount of the high water absorption resin in the strip-shaped structures in the first absorption layer is 80g/m ² (ii) a Flower-shaped diversion holes are formed in the first absorption core and the third absorption core; the aperture of the diversion holes of the first absorption core is 6mm, and the distribution density of the diversion holes is 250/m ² (ii) a The diameter of the diversion holes of the third absorption core is 2mm, and the distribution density of the diversion holes is 300/m ² 。

Example 4

Example 4 is essentially the same as example 1, except that: the supporting layer is not provided with a punching structure.

Example 5

Example 5 is essentially the same as example 1, except that: the aperture of the diversion hole of the third absorption core is 4mm.

Example 6

Example 6 is essentially the same as example 1, except that: the second absorption core is composed of a plurality of strip-shaped structures with the width of 2.5cm and the interval of two adjacent strip-shaped structures of 1cm, and the two adjacent strip-shaped structures are parallel to each other.

Example 7

Example 7 is essentially the same as example 1, except that: the second absorption core is composed of a plurality of strip-shaped structures with the width of 0.4cm and the interval of 0.04cm, and the adjacent two strip-shaped structures are parallel to each other.

Comparative example 1

Comparative example 1 is substantially the same as example 1 except that: the second absorbent layer has the same length and width as the first absorbent layer.

Comparative example 2

Comparative example 2 is substantially the same as example 1 except that: the second absorbent core is replaced with a super absorbent resin absorbent paper of the same super absorbent resin content.

Comparative example 3

Comparative example 3 is substantially the same as example 1 except that: circular diversion holes are formed in the first absorption core and the third absorption core; the aperture of each flow guide hole is 4mm, and the distribution density of each flow guide hole is 100/m ² 。

Comparative example 4

Comparative example 4 is substantially the same as example 1 except that: the supporting layer is made of super absorbent resin absorbent paper.

The utility model discloses in to example 1 to 8 and comparative example 1 to 4's absorption core respectively carried out performance test, the performance test result is shown in Table 1.

The test method comprises the following steps: taking animal blood for 2 times, wherein 5mL is taken each time, 10 minutes are spaced for 2 times, and the time for completing absorption each time is recorded as the absorption speed in unit of s; reverse osmosis is that after the sanitary towel absorbs 5mL of animal blood for 5min, 10g of filter paper is pressed by a 1.2kg weight and is placed on the sanitary absorption article for 1min, and the gram weight increased by the filter paper is weighed, and the unit g is measured;

attaching the absorbing article to the bottom of a U-shaped groove, longitudinally inclining the absorbing article to the left or right or backwards by 10 degrees, and carrying out liquid adding test; taking animal blood for 2 times, each time 5mL, and 2 times at an interval of 10 minutes, receiving the side leakage animal blood after each liquid adding through a tray, weighing and recording the side leakage amount, wherein the unit is g, and judging the side leakage prevention effect;

TABLE 1

As can be seen from the above embodiments, in embodiments 1 to 3 of the present invention, the absorbent core has excellent liquid absorption speed, excellent side leakage prevention effect, and excellent dry performance, and the utilization rate of the absorbent core is high; in comparative example 1, when the second absorbent layer was not folded to have the same area as the first absorbent layer, not only the liquid-absorbing speed of the central portion of the absorbent core was reduced, but also the utilization of the entire absorbent core was reduced; in comparative example 2, if the second absorbent core was replaced with a super absorbent resin absorbent paper, not only the liquid-absorbing speed of the first absorbent layer was reduced, but also liquid could not permeate down and spread to the supporting layer and the second absorbent layer in time; in comparative example 3, if the size of the flow guide holes in the second absorbent core is the same as that of the third absorbent core, although the liquid-absorbing rate of the absorbent core can be increased to some extent, the amount of reverse osmosis of the absorbent core increases, and the dryness of the top sheet decreases; in comparative example 4, when the super absorbent resin absorbent paper was used as the support layer, not only the liquid-wicking diffusion property of the support layer was lowered, but also the comfort of the absorbent core was poor.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects. The detailed description of the present invention is the technology known to those skilled in the art.

Claims (12)

1. An absorbent core, characterized by: the absorbent core comprises a wrapping layer and an absorbent layer; the absorption layer comprises a first absorption layer, a supporting layer and a second absorption layer which are sequentially arranged from top to bottom; the area of the second absorption layer is smaller than that of the first absorption layer; the first absorbent layer comprises a first absorbent core, a second absorbent core and a third absorbent core; the second absorbent core is positioned between the first absorbent core and the third absorbent core; the second absorption core is composed of a plurality of strip-shaped structures, and every two adjacent strip-shaped structures are parallel to each other; the first absorption core and the third absorption core are provided with diversion holes; the aperture of the first absorption core diversion hole is larger than that of the third absorption core diversion hole.

2. An absorbent core according to claim 1, characterized in that:

the hole pattern of the flow guide holes is at least one of a circle, a square, a diamond or a flower.

3. An absorbent core according to claim 1, characterized in that:

in the first absorption core, the aperture of the diversion holes is 1-10 mm, and the distribution density of the diversion holes is 50-250 per m ² 。

4. An absorbent core according to claim 1, wherein:

in the third absorption core, the aperture of the diversion holes is 1-5 mm, and the distribution density of the diversion holes is 50-400 per m ² 。

5. An absorbent core according to claim 1, wherein:

the aperture of the third absorbent core diversion hole is not less than 1/3 of the aperture of the first absorbent core diversion hole.

6. An absorbent core according to claim 1, wherein:

the strip-shaped structures are arranged along the length direction of the absorbent core.

7. An absorbent core according to claim 6, wherein:

the width of the strip-shaped structure is 0.5-2 cm; the interval between two adjacent strip structures is 1/5-1/3 of the width of the strip structure.

8. An absorbent core according to claim 1, wherein:

the thickness of the supporting layer is 2-5 mm; and a punching structure is arranged on the supporting layer.

9. An absorbent core according to claim 8, wherein:

the hole pattern of the punching structure is at least one of a circle, an ellipse or a rhombus.

10. An absorbent core according to claim 8, wherein:

the aperture of the punching structure1-8 mm, and the hole density of the punching structure is 100-200/m ² 。

11. An absorbent core according to claim 1, wherein:

the length of the second absorption layer is 1/8-1/5 of the length of the first absorption layer; the width of the second absorption layer is 1/5-1/3 of the width of the first absorption layer.

12. An absorbent core according to any of claims 1 to 11, characterized in that:

the first absorption core is wood pulp spunlace non-woven fabric; the strip-like structure in the second absorbent core is a super absorbent resin; the third absorption core is a terylene viscose spunlace non-woven fabric.

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