CN116725777B

CN116725777B - Breathable core and breathable paper diaper

Info

Publication number: CN116725777B
Application number: CN202310993271.0A
Authority: CN
Inventors: 邹超; 崔翠翠; 周彧峰
Original assignee: Lule Health Technology Co Ltd
Current assignee: Lule Health Technology Co Ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2023-11-24
Anticipated expiration: 2043-08-09
Also published as: CN116725777A

Abstract

The application relates to a breathable core body and a breathable paper diaper, wherein the breathable core body comprises a first fiber layer, a first carrier layer, a second fiber layer and a plurality of absorption parts which are sequentially arranged; the first carrier layer comprises a plurality of first protruding parts and a plurality of first concave parts, the first protruding parts and the second fiber layer enclose a plurality of first ventilation spaces respectively, the first concave parts and the first fiber layer enclose a plurality of first accommodating spaces respectively, and absorption parts are arranged in the first accommodating spaces respectively; the first fiber layer comprises a plurality of first hydrophobic parts, a plurality of second hydrophobic parts and a plurality of first hydrophilic parts, and each first hydrophobic part forms an air permeable channel with each first bulge part, each first air permeable space and the second fiber layer; according to the breathable core disclosed by the application, the skin of a wearer tends to be in contact with the first hydrophobic part before the absorption part is in liquid absorption expansion, and the skin of the wearer tends to be in contact with the second hydrophobic part after the absorption part is in liquid absorption expansion, so that a dry and breathable microclimate can be created.

Description

Breathable core and breathable paper diaper

Technical Field

The application relates to the technical field of sanitary products, in particular to a breathable core body and a breathable paper diaper comprising the breathable core body.

Background

The paper diaper comprises wearing articles such as a diaper, a pull-up diaper, a diaper, and the like, and is a wearing article which is directly contacted with the skin of a human body. The diaper can form a relatively airtight space with human skin during wearing, namely, a thin air layer is formed between the human skin and the diaper, which is called a microclimate of the diaper, and the diaper with poor air permeability can give a wearer a feeling of stuffiness and wetness, and even cause skin diseases.

The paper diaper absorbs the excrement of the user through the core body to protect the personal hygiene of the user, the absorption core body of the existing paper diaper is generally formed by high molecular water-absorbing resin densely packed on a waterproof bottom layer, and the problem of poor air permeability exists. Firstly, under the dry condition of unabsorbed urine, the porosity of the core body can be reduced due to the fact that a large amount of high molecular water-absorbing resin or wood pulp distributed in the absorption core body of the paper diaper reduces the air permeability of the paper diaper, in addition, the aperture of a waterproof bottom layer in the multilayer composite structure of the paper diaper is smaller, and the air permeability still has a large lifting space. Secondly, under the condition that urine is absorbed by the diaper, the problem of poor air permeability is further worsened, firstly, the liquid absorption expansion of the macromolecule absorbent resin in the core body is absorbed, the porosity of the core body is further reduced, the air permeability is greatly reduced, even if gaps or holes are reserved among the macromolecules to serve as air permeable channels of the core body, the size of the channels can be compressed after the liquid absorption expansion of the macromolecule absorbent resin, in addition, the hydrophilic fiber material of the waterproof bottom layer can be swelled after the absorption of moisture, the porosity is further reduced, and the air permeability of the diaper is reduced; in addition, the wet core will contact the wearer's skin after swelling, which makes the microclimate of the diaper wet. Therefore, it is necessary to provide a core or a diaper which can create a dry breathable microclimate.

Disclosure of Invention

Accordingly, an object of the present application is to provide a breathable core and a breathable diaper, in which the skin of a wearer tends to contact a first hydrophobic portion before the absorbent portion is imbibed and swelled to jack up a first fibrous layer, and the skin of the wearer tends to contact a second hydrophobic portion after the absorbent portion is imbibed and swelled to jack up the first fibrous layer, thereby creating a dry and breathable microclimate, and having the advantage of dry and breathable properties.

A breathable core body comprises a first fiber layer, a first carrier layer, a second fiber layer and a plurality of absorption parts which are sequentially arranged; the first carrier layer comprises a plurality of first protruding portions and a plurality of first concave portions, the plurality of first protruding portions and the plurality of first concave portions are arranged at intervals, the plurality of first protruding portions and the second fiber layer enclose a plurality of first ventilation spaces respectively, the plurality of first concave portions and the first fiber layer enclose a plurality of first accommodating spaces respectively, and the absorption portions are arranged in the first accommodating spaces respectively; the first fiber layer comprises a plurality of first hydrophobic parts, a plurality of second hydrophobic parts and a plurality of first hydrophilic parts, and each first hydrophobic part forms an air permeable channel with each first bulge part, each first air permeable space and each second fiber layer; each second water drain part is positioned at a position corresponding to each first accommodating space; each first hydrophilic part is positioned at a position corresponding to each first accommodating space.

According to the breathable core, the first hydrophobic part and the first bulge part are corresponding in position, so that the first hydrophobic part, the first bulge part, the first breathable space and the second fiber layer form a breathable channel of the core, and the core has good breathability; in addition, when the absorption part in the first accommodating space absorbs liquid and expands until the first fiber layer is jacked up, the skin of a wearer tends to be in contact with the first hydrophobic part, and the first hydrophobic part has hydrophobicity, so that a dry and breathable microclimate can be created; when the absorption part in the first accommodating space absorbs liquid and expands to jack up the first fiber layer, the absorption part jacks up the second hydrophobic part due to the fact that the second hydrophobic part corresponds to the first concave part, so that the skin of a wearer tends to be in contact with the second hydrophobic part with the hydrophobic property, and a dry and breathable microclimate is created.

Further, the positions of the first hydrophobic parts respectively correspond to the positions of the top ends of the first protruding parts; the positions of the second water drain parts respectively correspond to the positions corresponding to the bottom ends of the first concave parts; each of the first hydrophilic portions is located at a position corresponding to the plurality of first concave portions, respectively. The position of the first hydrophobic part corresponds to the top end of the first bulge part, so that the air duct for ventilation of the core body is more concentrated, and the ventilation efficiency is improved; the position of the second hydrophobic portion corresponds to the bottom end of the first concave portion, and the possibility that the second hydrophobic portion is jacked up by the water absorbed by the absorption portion is increased.

Further, when the moisture absorption degree of the absorption part reaches 40% -60%, the height of the absorption part is the same as that of the first protruding part. If the moisture absorption degree of the absorption part reaches 60%, the height of the absorption part is lower than that of the first bulge part, the height reached by the absorption part after moisture absorption, saturation and expansion is too small, the height of the absorption part for jacking the second hydrophobic part is too low, and the produced dry and breathable microclimate effect is poor; if the moisture absorption degree of the absorption portion is less than 40%, the height of the absorption portion is higher than that of the first protruding portion, and the height reached after the absorption portion is saturated and expanded by moisture absorption is too large, so that the skin of a wearer is pressed, and wearing experience is affected.

Further, the second fiber layer includes a plurality of third hydrophobic portions and a plurality of second hydrophilic portions, a plurality of third hydrophobic portions and a plurality of second hydrophilic portions are disposed at intervals, a plurality of third hydrophobic portions are respectively located at positions corresponding to the first ventilation spaces, a plurality of second hydrophilic portions are respectively located at positions corresponding to the first fiber layer, and the first hydrophobic portions respectively form ventilation channels with the first protruding portions, the first ventilation spaces and the third hydrophobic portions.

Further, the positions of the third water drain portions respectively correspond to the positions corresponding to the top ends of the first protruding portions.

Further, the fiber-reinforced plastic composite material further comprises a second carrier layer and a third fiber layer, wherein the second carrier layer is fixed between the second fiber layer and the third fiber layer; the second carrier layer comprises a plurality of second protruding portions and a plurality of second concave portions, the second protruding portions and the second concave portions are arranged at intervals, the second protruding portions and the third fiber layer enclose a plurality of second ventilation spaces, the second concave portions and the second fiber layer enclose a plurality of second accommodating spaces, the absorbing portions are further arranged in the second accommodating spaces, and the first hydrophobic portions and the first protruding portions, the first ventilation spaces, the second fiber layer, the second protruding portions, the second ventilation spaces and the third fiber layer form ventilation channels. Urine is preferentially absorbed by the absorption part in the first accommodating space, after the absorption part in the first accommodating space is saturated, the urine permeates downwards into the second accommodating space, when the absorption part in the first accommodating space is not saturated, the second carrier layer is still in a drier state, and the air permeability is still in a relatively better level, so that the first carrier layer and the second carrier layer are arranged to be favorable for keeping the air permeability effect of the core body.

Further, the position of each second protruding portion corresponds to the position of each first protruding portion, and the position of each second recessed portion corresponds to the position of each first recessed portion. The position of the second bulge part corresponds to the position of the first bulge part, so that the air duct for ventilation of the core body is more concentrated, and the ventilation efficiency is improved; the position of the second concave part corresponds to the position of the first concave part, and the absorption efficiency is improved.

Further, the third fiber layer includes a plurality of fourth hydrophobic portions and a plurality of third hydrophilic portions, a plurality of fourth hydrophobic portions and a plurality of third hydrophilic portions are disposed at intervals, a plurality of fourth hydrophobic portions are respectively located at positions corresponding to the second ventilation spaces, a plurality of third hydrophilic portions are respectively located at positions corresponding to the second fiber layer, and each first hydrophobic portion is respectively in ventilation channels with each first protruding portion, each first ventilation space, each second fiber layer, each second protruding portion, each second ventilation space, each fourth hydrophobic portion. The third fiber layer is provided with a fourth hydrophobic part, so that the first hydrophobic part, the first bulge part, the first ventilation space, the second fiber layer, the second bulge part, the second ventilation space and the fourth hydrophobic part form a ventilation channel of the core body, and the ventilation property of the core body is further improved.

Further, the positions of the fourth hydrophobic portions respectively correspond to the positions corresponding to the top ends of the second protrusions. The position of the fourth hydrophobic part corresponds to the bottom end of the second concave part, so that the air duct of the core body is more concentrated, and the ventilation efficiency is improved.

The application also provides a breathable paper diaper, which comprises any breathable core.

For a better understanding and implementation, the present application is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a schematic cross-sectional view of a breathable core according to example 1;

FIG. 2 is a schematic cross-sectional view of the air-permeable core of example 2;

FIG. 3 is a schematic cross-sectional view of the air-permeable core of example 3;

FIG. 4 is a schematic cross-sectional view of the air-permeable core of example 4;

FIG. 5 is a schematic cross-sectional view of a breathable core according to example 5;

FIG. 6 is a schematic cross-sectional view of a breathable core according to example 6;

wherein, the first fiber layer 1, the first hydrophobic part 11, the second hydrophobic part 12, the first hydrophilic part 13, the first carrier layer 2, the first protruding part 21, the first ventilation space 023, the first lower concave part 22, the first accommodating space 021, the second fiber layer 3, the third hydrophobic part 31, the second hydrophilic part 32, the absorbing part 4, the color-developing layer 5, the second carrier layer 6, the second protruding part 61, the second ventilation space 067, the second lower concave part 62, the second accommodating space 063, the third fiber layer 7, the fourth hydrophobic part 71, the third hydrophilic part 72.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all embodiments of the present application.

All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the application, are intended to be within the scope of the embodiments of the present application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

Furthermore, in the description of the present application, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

It is to be understood that the embodiments of the application are not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the application is limited only by the appended claims.

In the present application, each layer of material forming the air-permeable core is an air-permeable material.

Example 1

Referring to fig. 1, the breathable core includes a first fiber layer 1, a first carrier layer 2, a second fiber layer 3, and a plurality of absorption portions 4, which are sequentially arranged; the first carrier layer 2 comprises a plurality of first protruding portions 21 and a plurality of first concave portions 22, the plurality of first protruding portions 21 and the plurality of first concave portions 22 are arranged at intervals, the plurality of first protruding portions 21 respectively enclose a plurality of first ventilation spaces 023 with the second fiber layer 3, the plurality of first concave portions 22 respectively enclose a plurality of first accommodating spaces 021 with the first fiber layer 1, the first fiber layer 1 comprises a plurality of first hydrophobic portions 11, a plurality of second hydrophobic portions 12 and a plurality of first hydrophilic portions 13, and each first hydrophobic portion 11 respectively forms ventilation channels with each first protruding portion 21, each first ventilation space 023 and each second fiber layer 3; each second water drain portion 12 is located at a position corresponding to each first accommodating space 021; each of the first hydrophilic parts 13 is located at a position corresponding to each of the first receiving spaces 021, and each of the first and second hydrophobic parts 11 and 12 has hydrophobicity.

In a preferred embodiment, the position of each first water-repellent section 11 corresponds to the position of the tip of each first convex section 21; the positions of the second water-repellent parts 12 correspond to the positions corresponding to the bottom ends of the first concave parts 22, respectively; each of the first hydrophilic portions 13 is located at a position corresponding to the plurality of first concave portions 22, respectively.

The first hydrophilic portion 13 is located at the upper end of the first concave portion 22, and urine is preferentially absorbed into the first accommodating space 021 and absorbed by the absorbing portion 4; the first hydrophobic portion 11 corresponds to the first protruding portion 21 in position, the first hydrophobic portion 11, the first protruding portion 21, the first ventilation space 023 and the second fiber layer 3 form a first ventilation channel of the core body of this embodiment, and ventilation property of the core body is improved, and since the carrier layer itself has a certain structural stability, when the absorption portion 4 presses the first concave portion due to liquid absorption expansion, deformation degree of the first protruding portion is small, so that the degree of shrinkage of the first ventilation channel is low, the first ventilation channel can stably exist in the core body for a long time, and the core body can have a certain ventilation property in the whole service period.

In this embodiment, the first fibrous layer 1, the first carrier layer 2 and the second fibrous layer 3 are bonded by means of a hot melt adhesive.

In this embodiment, the whole first fiber layer 1 is made of a hydrophilic material, and hydrophobic treatment is performed on the corresponding position of the first fiber layer 1 to form a first hydrophobic portion 11 and a second hydrophobic portion 12, so that the first hydrophobic portion 11 and the second hydrophobic portion 12 have hydrophobic properties, and the hydrophobic finishing can be achieved by adopting a manner of coating a hydrophobic coating; the first hydrophilic portion 13 is not treated, and urine flows to the first fibrous layer 1 more tends to penetrate downward at the first hydrophilic portion 13;

in the present embodiment, the first carrier layer 2 is made of a hydrophilic material and has elasticity and support, on the basis of which the first convex portion 21 and the first concave portion 22 of the first carrier layer 2 can maintain their shapes well and can recover the shapes after being pressed to secure the stability of the ventilation effect.

In this embodiment, the second fibrous layer 3 is made of a hydrophilic material.

In the present embodiment, the absorbent portion 4 employs a high molecular water absorbent resin SAP, and specifically, sodium polyacrylate may be employed. In the state where the absorbent portion 4 is not liquid-absorbent, the thickness of the absorbent portion 4 is much smaller than the height of the first projecting portion 21, and therefore, when the liquid-absorbent degree of the absorbent portion 4 is not high (the height of the absorbent portion 4 is not higher than the height of the first projecting portion 21), the skin of the wearer tends to come into contact with the first hydrophobic portion 11.

The process of urine absorption by the breathable core of this embodiment is:

after the urine flows to the first fiber layer 1, the urine contacts the first hydrophilic portion 13, the first hydrophobic portion 11 and the second hydrophobic portion 12 at the same time, because the first hydrophobic portion 11 and the second hydrophobic portion 12 have hydrophobic properties, and the first hydrophilic portion 13 has hydrophilic properties, the urine on the first fiber layer 1 directly permeates down along the first hydrophilic portion 13 into the first accommodating space 021 and is absorbed by the absorbing portion 4 in the first accommodating space 021, and the urine on the first hydrophobic portion 11 and the second hydrophobic portion 12 flows to the first hydrophilic portion 13 and permeates into the first accommodating space 021, so that the first hydrophobic portion 11 and the second hydrophobic portion 12 both keep dry and comfortable, and the first hydrophilic portion 13 provides a permeation channel for the urine from the first fiber layer 1 to the first carrier layer 2.

On this basis, the skin of the wearer tends to contact the first hydrophobic portion 11 before the absorbent portion 4 absorbs urine and swells to jack up the first fibrous layer, and the surface of the first hydrophobic portion 11 remains dry due to its hydrophobicity, so that the wearer has a dry wearing experience when the height of the absorbent portion 4 after absorbing urine is lower than the height of the first convex portion 21; when urine permeates into the first concave part 22 through the first hydrophilic part 13, the first hydrophilic part 13 is in a wet state, and the weight of the first hydrophilic part 13 relative to the hydrophobic part of the first fiber layer 1 is larger, so that the first hydrophilic part 13 tends to collapse downwards, on one hand, the first hydrophilic part 13 which collapses downwards and the first hydrophobic part 11 supported by the first bulge part 21 form a certain height difference to form a tiny second ventilation channel, a dry and breathable microclimate can be created, the wearing experience of a wearer is optimized, and on the other hand, a downward slope is formed relative to the downward collapsed first hydrophilic part 2 and the uncollapsed hydrophobic part on the first fiber layer 1, a diversion effect is formed on downward leakage of the urine, and the downward leakage of the urine can be quickened;

on this basis, when the absorption portion 4 absorbs liquid and swells to jack up the first fiber layer 1 after absorbing urine, the absorption portion 4 jacks up the second hydrophobic portion 12 due to the position of the second hydrophobic portion 12 corresponding to the position of the first concave portion 22, so that the skin of the wearer tends to contact with the second hydrophobic portion 12, and the surface of the second hydrophobic portion 12 remains dry due to the hydrophobic property, so that the wearer has a dry wearing experience when the height of the absorption portion 4 after absorbing urine is higher than the height of the first convex portion 21; at this time, the second hydrophobic portion 12 and the first hydrophobic portion 11 have a height difference, so that on one hand, a tiny third ventilation channel can be formed, a dry ventilation microclimate is created, the wearing experience of a wearer is optimized, on the other hand, the second hydrophobic portion 12 which is like an upper bulge and the first hydrophilic portion which is downwards collapsed form a downward slope, a diversion effect is formed on downward leakage of urine, and downward leakage of urine can be quickened.

It should be noted that, during the use, due to the stability of the structure of the first carrier layer 2, the first ventilation channel formed by the first hydrophobic portion 11 and the first protruding portion 21 will continuously exist stably, so that the core continuously has good ventilation performance; on the basis, when the height of the absorption part 4 after absorbing urine is lower than that of the first bulge part 21, the first ventilation channel is communicated with the second ventilation channel, the drying ventilation of the microclimate is further ensured under the synergistic effect of the first ventilation channel and the second ventilation channel, and likewise, when the height of the absorption part 4 after absorbing urine is higher than that of the first bulge part 21, the first ventilation channel is communicated with the third ventilation channel, and the drying ventilation of the microclimate is further ensured under the synergistic effect of the first ventilation channel and the third ventilation channel.

According to the breathable core, under the combined action of the first breathable channel, the second breathable channel and the third breathable channel, the core body has dry and breathable microclimate when the absorption part absorbs moisture and is unsaturated and saturated, and the breathable core body has the advantages of being good in breathability and stable in breathability.

The embodiment also provides a breathable paper diaper, which comprises the breathable core, the surface layer and the bottom layer, wherein the surface layer, the breathable core and the bottom layer are sequentially arranged; the surface layer is made of a fiber material with low moisture regain, such as polypropylene fiber (PP), so that on one hand, urine can be ensured to normally permeate into the core body, and on the other hand, the moisture absorption and swelling of the surface layer can be reduced, and the permeation effect can be ensured; the bottom layer is made of hydrophobic non-woven fabrics or other hydrophobic textile materials, and the porosity of the bottom layer is far higher than that of the waterproof membrane, so that the air permeability is greatly improved.

In other embodiments, care should be taken that the total area of the first hydrophobic portion 11 and the second hydrophobic portion 12 accounts for 40% -60% of the total area of the first fiber layer 1. If the ratio of the total area of the first hydrophobic portion 11 and the second hydrophobic portion 12 to the total area of the first fibrous layer 1 is less than 40%, after the absorbent portion 4 absorbs liquid and swells, part of the first hydrophilic portion 13 still contacts with the skin of the wearer, resulting in a moist feeling, and the air permeability of the first hydrophobic portion 11 is insufficient; if the total area of the first water-repellent part 11 and the second water-repellent part 12 occupies more than 60% of the total area of the first fiber layer 1, the area for urine to permeate is too small, which affects the downward permeation speed of urine.

In other embodiments, it should be noted that when the moisture absorption degree of the absorbing portion 4 reaches 40% -60%, the height of the absorbing portion 4 is the same as the height of the first protruding portion 21. If the moisture absorption degree of the absorption portion 4 reaches 60%, the height of the absorption portion 4 is lower than the height of the first protruding portion 21, the height reached by the absorption portion 4 after moisture absorption, saturation and expansion is too small, the height of the absorption portion 4 lifting the second hydrophobic portion 12 is too low, and the created dry and breathable microclimate effect is poor; if the moisture absorption degree of the absorbent portion 4 is less than 40%, the height of the absorbent portion 4 is higher than the height of the first protruding portion 21, and the height reached after the absorbent portion 4 is saturated and swelled by moisture absorption is too large, which may cause stress on the skin of the wearer and affect the wearing experience.

In other embodiments, care should be taken that the total area of the first undercut 22 is 30% -40% of the total area of the first carrier layer 2. The total area of the first concave portion 22 occupies less than 30% of the total area of the first carrier layer 2, so that the absorption capacity of the core cannot be ensured, and the total area of the first concave portion 22 occupies more than 40% of the total area of the first carrier layer 2, so that the air permeability of the core is poor.

In other embodiments, care should be taken that the total area of the first protrusions 21 is 50% -60% of the total area of the first carrier layer 2. The air permeability of the core is poor if the total area of the first protrusions 21 is less than 50% of the total area of the first carrier layer 2, and the absorption capacity of the core is poor if the total area of the first protrusions 21 is more than 60% of the total area of the first carrier layer 2.

Example 2

The present embodiment provides a ventilation core, referring to fig. 2, the overall structure of the ventilation core is the same as that of embodiment 1, and the positional relationship and fixing manner of the first fiber layer 1 and the first carrier layer 2 of the present embodiment are the same as those of embodiment 1, and the structures of the first fiber layer 1 and the first carrier layer 2 are the same as those of embodiment 1, and the difference between the present embodiment and embodiment 1 is the second fiber layer 3.

The second fiber layer 3 of the present embodiment includes a plurality of third hydrophobic portions 31 and a plurality of second hydrophilic portions 32, the plurality of third hydrophobic portions 31 and the plurality of second hydrophilic portions 32 are disposed at intervals, the plurality of third hydrophobic portions 31 are respectively located at positions corresponding to the respective first air-permeable spaces 023, the plurality of second hydrophilic portions 32 are respectively located at positions corresponding to the first fiber layer 1, and the respective first hydrophobic portions 11 respectively form air-permeable channels with the respective first protrusions 21, the respective first air-permeable spaces 023 and the respective third hydrophobic portions 31.

The ventilation core of the present embodiment, in which the first ventilation channel of the ventilation core of the present embodiment is formed by the first hydrophobic part 11, the first protruding part 21, and the third hydrophobic part 31, further improves the ventilation property of the core relative to the ventilation channel of embodiment 1.

In a preferred embodiment, the position of each third hydrophobic portion 31 corresponds to the position corresponding to the tip of each first protruding portion 21.

Example 3

Referring to fig. 3, the present embodiment provides a breathable core, which includes a first fiber layer 1, a first carrier layer 2, a second fiber layer 3, a color-developing layer 5 and a plurality of absorbing portions 4 sequentially disposed, wherein the positional relationship and the fixing manner of the first fiber layer 1, the first carrier layer 2, the second fiber layer 3 and the plurality of absorbing portions 4 are the same as those of embodiment 1, and the structures of the first fiber layer 1, the first carrier layer 2, the second fiber layer 3 and the plurality of absorbing portions 4 are the same as embodiment 1, and the difference between this embodiment and embodiment 1 is the color-developing layer 5.

The color developing layer 5 of the present embodiment is fixed on the second fiber layer 3. The color-developing layer 5 may be formed of a material coated with a urine color-developing agent or may be formed of a coating layer formed of the urine color-developing agent itself; when urine permeates into the color-developing layer 5, the color-developing agent and the urine undergo a color-changing reaction, wherein the color-changing reaction is a reaction that the color difference before and after the reaction is large and the color difference can be obviously perceived by naked eyes of a human body. The color-developing layer 5 can assist the user in judging the condition of urine diffusion and penetration. Specifically, considering that normal urine is generally weak acidic, an acid-base indicator can be used as a urine color developing agent, and the expected technical effect of the color developing layer 5 is achieved by utilizing the characteristic that urine generates corresponding color change when meeting the acid-base indicator.

Example 4

The present embodiment provides a breathable core, referring to fig. 4, the breathable core includes a first fiber layer 1, a first carrier layer 2, a second fiber layer 3, a second carrier layer 6, a third fiber layer 7, and a plurality of absorbing portions 4 sequentially disposed, where the positional relationship and the fixing manner of the first fiber layer 1, the first carrier layer 2, and the second fiber layer 3 are the same as those of embodiment 1, and the structures of the first fiber layer 1, the first carrier layer 2, and the second fiber layer 3 are the same as embodiment 1, and compared with embodiment 1, the breathable core further includes the second carrier layer 6, the third fiber layer 7, and the absorbing portions 4.

In this embodiment, one side of the second carrier layer 6 is fixed to one side of the second fibrous layer 3 which is not fixed to the first carrier layer 2, and the other side of the second carrier layer 6 is fixed to the third fibrous layer 7; the second carrier layer 6 includes a plurality of second protruding portions 61 and a plurality of second concave portions 62, the plurality of second protruding portions 61 and the plurality of second concave portions 62 are arranged at intervals, the plurality of second protruding portions 61 and the third fiber layer 6 enclose a plurality of second ventilation spaces 067, the plurality of second concave portions 62 and the second fiber layer 3 enclose a plurality of second accommodation spaces 063, and the plurality of absorbing portions 4 are further arranged in the second accommodation spaces 063.

When the air-permeable core of the present embodiment absorbs urine, the urine is preferentially absorbed by the absorbing portion 4 located in the first accommodating space 021, and when the space of the first protruding portion 21 is slightly reduced due to the liquid-absorbing expansion of the absorbing portion 4 in the first accommodating space 021 nearby, the air-permeable effect of the second carrier layer can still be maintained at a relatively better level because the amount of urine absorbed by the absorbing portion 4 in the second carrier layer 6 is still smaller and the space of the second concave portion 62 has not yet been reduced. In addition, since urine is diffused to a certain extent after passing through the first carrier layer 2, the urine can flow into the different second accommodating spaces 063 more dispersedly than the first carrier layer 2, the liquid absorption saturation speed of the single absorption part in the second carrier layer is delayed, and the air permeable space formed by the second bulge part is reduced.

In this embodiment, the first carrier layer 2 and the second carrier layer 6 are arranged at the same time, so that the ventilation effect of the core body can be maintained at a better level for a longer period of time.

In a preferred embodiment, the positions of the second protruding parts 61 correspond to the positions of the first protruding parts 21, so that the air channels for ventilation of the core body are more concentrated, and the ventilation efficiency is improved; the position of each second concave portion 62 corresponds to the position of each first concave portion 22; the urine leaking from the first concave portion 22 can accurately fall onto the absorption portion 4 of the second accommodation space 063, thereby improving absorption efficiency.

In other embodiments, care should be taken that the total area of the second recesses 62 is 30% -40% of the total area of the second carrier layer 6. The total area of the second concave portion 62 occupies less than 30% of the total area of the second carrier layer 6, so that the absorption capacity of the core cannot be ensured, and the total area of the second concave portion 62 occupies more than 40% of the total area of the second carrier layer 6, so that the air permeability of the core is poor.

In other embodiments, care should be taken that the total area of the second protrusions 61 is 50% -60% of the total area of the second carrier layer 6. The air permeability of the core is poor if the total area of the second protrusions 61 is less than 50% of the total area of the second carrier layer 6, and the absorption capacity of the core is poor if the total area of the second protrusions 61 is more than 60% of the total area of the second carrier layer 6.

Example 5

The present embodiment provides a breathable core, referring to fig. 5, the overall structure of the breathable core is the same as that of embodiment 4, and the structures and arrangement of the first fiber layer 1, the first carrier layer 2, the second fiber layer 3 and the second carrier layer 6 of the present embodiment are the same as those of embodiment 4, and the difference between the present embodiment and embodiment 4 is that the third fiber layer 7 of the present embodiment includes a plurality of fourth hydrophobic portions 71 and a plurality of third hydrophilic portions 72.

The fourth hydrophobic portions 71 and the third hydrophilic portions 72 are disposed at intervals, the fourth hydrophobic portions 71 are located at positions corresponding to the second air-permeable spaces 067, the third hydrophilic portions 72 are located at positions corresponding to the second fiber layers 3, and the first hydrophobic portions 11 form air-permeable channels with the first protrusions 21, the first air-permeable spaces 023, the second fiber layers 3, the second protrusions 61, the second air-permeable spaces 067, and the fourth hydrophobic portions 71.

In this embodiment, the fourth hydrophobic portion 71 is provided on the third fiber layer 7, so that the first hydrophobic portion 11, the first protruding portion 21, the first air-permeable space 023023, the second fiber layer 3, the second protruding portion 61, the second air-permeable space 067067, and the third hydrophobic portion 71 form the first air-permeable channel of the core of this embodiment, thereby further improving the air permeability of the core.

In a preferred embodiment, the position of each of the fourth water-repellent parts 71 corresponds to the position corresponding to the tip of each of the second protrusions 61.

Example 6

Referring to fig. 6, the breathable core includes a first fiber layer 1, a first carrier layer 2, a second fiber layer 3, a second carrier layer 6, a third fiber layer 7, a color-developing layer 5 and a plurality of absorption portions 4 that are sequentially disposed, where the structures and arrangement manners of the first fiber layer 1, the first carrier layer 2, the second carrier layer 6, the third fiber layer 7 and the plurality of absorption portions 4 are the same as those of embodiment 5; this embodiment differs from example 5 in the second fibrous layer 3 and the color-developing layer 5.

The second fiber layer 3 of the present embodiment includes a plurality of third hydrophobic portions 31 and a plurality of second hydrophilic portions 32, the plurality of third hydrophobic portions 31 and the plurality of second hydrophilic portions 32 are disposed at intervals, the positions of the plurality of second hydrophilic portions 32 correspond to the positions of the plurality of first concave portions 22, and the positions of the plurality of third hydrophobic portions 31 correspond to the positions of the plurality of first convex portions 21;

the color developing layer 5 of the present embodiment is fixed on the third fiber layer 7. The color-developing layer 5 can be made of a material coated with a urine color-developing agent, and when urine permeates into the color-developing layer 5, the color-developing agent reacts with the urine to change color so as to assist a user in judging the diffusion and permeation of the urine.

The air-permeable core of this embodiment forms the first air-permeable channel of this embodiment by providing the first water-repellent section 11, the first convex section 21, the first air-permeable space 023, the second water-repellent section 31, the second convex section 61, the second air-permeable space 067, and the third water-repellent section 71, so that the core has good air permeability.

The application further provides a breathable paper diaper, and the breathable paper diaper can adopt the breathable core according to any one of embodiments 1-6.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the application, and the application is intended to encompass such modifications and improvements.

Claims

1. The breathable core is characterized by comprising a first fiber layer, a first carrier layer, a second fiber layer, a second carrier layer, a third fiber layer and a plurality of absorption parts which are sequentially arranged;

the first carrier layer comprises a plurality of first protruding portions and a plurality of first concave portions, the plurality of first protruding portions and the plurality of first concave portions are arranged at intervals, the plurality of first protruding portions and the second fiber layer enclose a plurality of first ventilation spaces respectively, the plurality of first concave portions and the first fiber layer enclose a plurality of first accommodating spaces respectively, and the absorption portions are arranged in the first accommodating spaces respectively; the first carrier layer is made of hydrophilic materials and has elasticity and support property;

the first fiber layer comprises a plurality of first hydrophobic parts, a plurality of second hydrophobic parts and a plurality of first hydrophilic parts, the second fiber layer comprises a plurality of third hydrophobic parts and a plurality of second hydrophilic parts, the plurality of third hydrophobic parts and the plurality of second hydrophilic parts are arranged at intervals, the plurality of third hydrophobic parts are respectively positioned at positions corresponding to the first ventilation spaces, and the plurality of second hydrophilic parts are respectively positioned at positions corresponding to the first fiber layer;

the second carrier layer is fixed between the second fiber layer and the third fiber layer; the second carrier layer comprises a plurality of second protruding parts and a plurality of second concave parts, the second protruding parts and the second concave parts are arranged at intervals, the second protruding parts and the third fiber layer enclose a plurality of second ventilation spaces, the second concave parts and the second fiber layer enclose a plurality of second accommodating spaces, and the absorbing parts are further arranged in the second accommodating spaces;

the third fiber layer comprises a plurality of fourth hydrophobic parts and a plurality of third hydrophilic parts, the fourth hydrophobic parts and the third hydrophilic parts are arranged at intervals, the fourth hydrophobic parts are respectively positioned at positions corresponding to the second ventilation spaces, the third hydrophilic parts are respectively positioned at positions corresponding to the second fiber layer, and the first hydrophobic parts respectively form ventilation channels with the first bulge parts, the first ventilation spaces, the second fiber layer, the second bulge parts, the second ventilation spaces and the fourth hydrophobic parts;

when the moisture absorption degree of the absorption part reaches 40% -60%, the height of the absorption part is the same as that of the first bulge part;

the positions of the first hydrophobic parts respectively correspond to the positions of the top ends of the first protruding parts; the positions of the second water drain parts respectively correspond to the positions corresponding to the bottom ends of the first concave parts; each first hydrophilic part is respectively positioned at the positions corresponding to the first concave parts;

the positions of the third hydrophobic portions correspond to the positions corresponding to the top ends of the first protruding portions.

2. The breathable core according to claim 1, characterized in that the position of each second bulge corresponds to the position of each first bulge, and the position of each second undercut corresponds to the position of each first undercut.

3. The air-permeable core according to claim 2, wherein the position of each of the fourth water-repellent parts corresponds to the position corresponding to the tip of each of the second protrusions.

4. A breathable diaper characterized by comprising the breathable core according to any one of claims 1 to 3.