CN111150553A

CN111150553A - Absorbent product with body fitting arc-shaped narrow crotch part and preparation method thereof

Info

Publication number: CN111150553A
Application number: CN202010035865.7A
Authority: CN
Inventors: 陈剑煌
Original assignee: Baron China Co ltd
Current assignee: Baron China Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-05-15

Abstract

The invention relates to an absorption product with a proper arc-shaped narrow crotch, which comprises a liquid-tight bottom layer and an absorption core layer, wherein an elastic part connected with the absorption core layer is arranged at the crotch between the liquid-tight bottom layer and the absorption core layer, the elastic part generates elastic force in the transverse direction of the crotch, when the absorption product is in a free relaxation or use state, an arc-shaped narrow crotch structure is formed at the crotch of the absorption product, and the arc-shaped narrow crotch structure enables the absorption product to be adaptive to the body of a user when in use. The elastic component can be arranged in the central area of the crotch, or the elastic component can be cut into two longitudinal side edges which are symmetrically arranged at the crotch, and the side edge of each elastic component close to the leakage-proof separation edge extends to the base of the leakage-proof separation edge along the width direction of the absorbent product and is connected with the absorbent core layer and the liquid-tight bottom layer into a whole.

Description

Absorbent product with body fitting arc-shaped narrow crotch part and preparation method thereof

Technical Field

The invention belongs to the technical field of disposable sanitary products, and particularly relates to an absorbent product with a fit arc-shaped narrow crotch part and a preparation method thereof.

Technical Field

Absorbent articles, also known as disposable absorbent articles or sanitary products, including diapers, sanitary napkins, pull-ups, and the like, have been widely used in personal care applications, allowing infants and other incontinent individuals to store excreta through the disposable absorbent articles and isolate the excreta from the body, clothing, bedding, and the like of the wearer, thereby improving the convenience of care and protecting the skin of the infants and other incontinent individuals.

The absorption medium of the absorption product is an absorption core body, and comprises a traditional absorption core body and a composite absorption core body, wherein the traditional absorption core body is formed by blending fluff pulp fibers and super absorbent resin particles. At present, the trend of the technical field is to use a composite absorption core as an absorption medium of an absorption product, and the composite absorption core has the characteristics of falling resistance, no fault, no lump, extremely ultra-thin and the like. In terms of structure, the composite absorption core is generally of a 5-layer structure, and comprises an upper covering layer, a lower covering layer and fluffy non-woven fabrics positioned between the upper covering layer and the lower covering layer from top to bottom, and granular super absorbent resin is implanted and embedded into the surface layer and the bottom layer of the fluffy non-woven fabrics respectively.

The traditional process causes the diaper to be thick and heavy, and the crotch part is not proper, so that the movement of the infant is inconvenient. On the other hand, after the absorption core body absorbs liquid, the absorption core body naturally sags under the action of gravity and even heaps and faults are formed, so that the absorption core body is very easy to squeeze or rub the crotch of an infant, inconvenience is brought to the activity of the infant, harm is brought to the health of the infant, and the healthy growth of the infant is influenced.

Most of the current diapers also focus on leakage protection. In order to make the baby more comfortable, the paper diaper is designed to be suitable for the cutting mode of the hip curve of the baby, and the structure of the absorbent product without inner side pressure on the legs of the baby is especially designed, so that the diaper is very important for the healthy growth of the baby.

Therefore, the patent with the publication number of CN203089561U provides a golden double-arc multi-layer core body diaper, which comprises a strip-shaped inner core body arranged in the diaper, wherein the inner core body is provided with concave arc lines for abdicating legs, and the concave arc lines are symmetrically arranged on two sides of the central line of the inner core body along the length direction of the inner core body; the inner core body comprises two end parts and a middle part positioned between the two end parts along the length direction of the inner core body, the width of the middle part is smaller than the width of the two end parts, the two ends of the middle part are respectively connected with the end parts through transition sections, and the transition sections are naturally connected from the middle part to the two end parts in a transition mode in a gradually widening mode. By accurately cutting the radian of the crotch part, a golden ratio double arc is formed, so that the inner sides of the legs of the baby are not stressed, the baby is more comfortable and fit after being worn on the body, and the movement is more convenient and free; and on the basis of ensuring the dryness and leakage prevention of the paper diaper, the paper diaper is lighter, thinner and more breathable, and the inner core body is not broken and does not stick together, thereby being beneficial to the healthy growth of the baby.

As another example, the invention patent with publication number CN107361924A discloses a body fitting leakage-proof absorbent article, which comprises a liquid-permeable surface layer, a liquid-impermeable bottom layer, and a dumbbell-shaped absorbent core, wherein left and right leakage-proof separation edges are respectively disposed on two sides of the absorbent article in the width direction, each leakage-proof separation edge comprises a base portion, a free portion, and a stretchable portion connected to the free portion and located at the upper end of the free portion, an elastic body is disposed in the stretchable portion, so that the leakage-proof separation edges have elastic stretchability in the longitudinal direction, each leakage-proof separation edge further comprises a body fitting connection portion disposed between the base portion and the free portion, the body fitting connection portion is disposed at the edge of the two longitudinal sides of the crotch portion of the dumbbell-shaped absorbent core, and when the absorbent article is in a natural loose three-dimensional state, the leakage-proof separation edge at the connection portion between the free portion and the body fitting connection portion is shrunk inwards along the width direction of the crotch portion of the, each leakage-proof separation edge forms a three-dimensional arc-shaped leakage-proof separation edge in the width direction of the absorbent product.

Although the prior art sets up the absorbent core of absorbent article as the absorbent core that crotch portion is arc structure, also called dumbbell type absorbent core, the both sides of absorbent article still can carry out continuous friction to wearer's shank skin in the use, especially after the absorbent article droops because of the imbibition dead weight, very easily appears the scratch even red swelling inflammation on infant's skin. Therefore, the invention provides an absorbent product with a body-fitting arc-shaped narrow crotch part on the basis of the existing absorbent product, so that the absorbent product is more body-fitting, comfortable and better in body fitting effect.

Disclosure of Invention

In order to overcome the technical problems that the existing absorbent product is uncomfortable and uncomfortable in use and is easy to continuously rub the skin of the legs of a wearer, and particularly after the absorbent product drops due to the self weight of liquid absorption, the skin of an infant is very easy to scratch or even become red and swollen and inflamed, the invention provides the absorbent product with the body-fitting arc-shaped narrow crotch part, so that the absorbent product is more suitable and comfortable to wear and has better dynamic close-fitting effect, and the technical scheme is realized:

the absorbent article with the body-fitting arc-shaped narrow crotch comprises a liquid-tight bottom layer and an absorbent core layer, wherein an elastic part connected with the absorbent core layer is arranged at the crotch position between the liquid-tight bottom layer and the absorbent core layer, the elastic part generates elastic force in the transverse direction of the crotch position, the elastic force enables the absorbent article to be in free relaxation or in a use state, the crotch position of the absorbent article forms an arc-shaped narrow crotch structure, and the arc-shaped narrow crotch structure enables the absorbent article to be adapted to the body of a user when in use.

Preferably, the elastic member is disposed in a central region of the crotch portion and is integrally connected to the absorbent core layer and the liquid-impermeable back sheet, respectively.

Preferably, the elastic parts are composed of a first elastic part and a second elastic part which are symmetrically arranged at the two longitudinal side edges of the crotch position and are connected with the absorption core layer and the liquid-tight bottom layer into a whole.

The absorbent product is further provided with a leakage-proof separating edge, specifically, a left leakage-proof separating edge and a right leakage-proof separating edge which extend along the longitudinal direction are respectively arranged on two sides of the width direction of the absorbent product, and each leakage-proof separating edge comprises a base part, a free part which is connected to the base part and is positioned at the upper end of the base part, and a telescopic part which is connected to the free part and is positioned at the upper end of the free part. Preferably, the side edges of each elastic member adjacent to the leakage barriers extend to the base of the leakage barriers along the width direction of the absorbent article.

Preferably, the distance between the first elastic part and the second elastic part is 10-60 mm; the stretch ratio of the elastic component is 1.2-2.2 times, and the longitudinal length is 50-300 mm. More preferably, the stretch ratio of the elastic member is 1.6 to 1.7 times.

Preferably, the elastic component is an elastic film, an elastic nonwoven fabric, an elastic yarn, an elastic glue coating or a perforated PE film, wherein the elastic yarn is spandex yarn or oak root.

In some embodiments, a method of making an absorbent article having a fit curved narrow crotch portion as described above, comprises a two-pass positioning process comprising the steps of:

step 1, connecting the PE breathable film and the spun-bonded non-woven fabric into a liquid-tight bottom layer in a composite mode.

And 2, taking the longitudinal center line, the transverse center line and the cross points of the longitudinal center line and the transverse center line of the absorbent product as references, positioning the liquid-impermeable back layer and the corresponding crotch position of the liquid-impermeable back layer for the first time, then stretching the elastic part to a certain stretching ratio to be compositely connected on the liquid-impermeable back layer so that the elastic part is positioned in the central area corresponding to the crotch position, or cutting the elastic part into a first elastic part and a second elastic part, respectively stretching to a certain stretching ratio and then symmetrically arranging the first elastic part and the second elastic part at the two longitudinal side edges of the crotch position so that the elastic part generates elastic force in the transverse direction of the crotch position.

And 3, positioning the elastic component or the composite bottom layer consisting of the elastic component and the liquid-tight bottom layer for the second time, and then compositely connecting the absorbent core layer on the elastic component or/and the composite bottom layer.

Specifically, in this step, the absorption core layer is formed by laterally wrapping the composite core body with the core body wrapping layer, and the two longitudinal side edges of the core body wrapping layer wrap the surface layer and are bent inwards towards the bottom layer. As one mode, the elastic component is connected with the core wrapping layer and the liquid-tight bottom layer or connected with the core wrapping layer, the composite core and the liquid-tight bottom layer into a whole.

And 4, after the steps of forming the liquid-permeable top layer and the leakproof isolation edges in sequence, forming an arc-shaped narrow crotch structure at the crotch position of the absorbent product when the absorbent product is in a free loose or using state due to the elastic force.

In other embodiments, a method of making an absorbent article having a tailored curved narrow crotch portion as described above, comprising a two-pass orientation process comprising the steps of:

step 1, laterally wrapping the composite core body by using a core body wrapping layer to form an absorption core layer.

And 2, taking the longitudinal center line, the transverse center line and the cross points of the longitudinal center line and the transverse center line of the absorbent product as references, positioning the absorbent core layer and the corresponding crotch position for the first time, then stretching the elastic component to a certain stretching ratio, and then compositely connecting the elastic component below the core body wrapping layer corresponding to the crotch position, so that the elastic component is positioned in the central area corresponding to the crotch position, or cutting the elastic component into a first elastic component and a second elastic component, respectively stretching to a certain stretching ratio, and then symmetrically arranging the first elastic component and the second elastic component on two longitudinal side edges of the absorbent core layer corresponding to the crotch position, so that the elastic component generates elastic force in the transverse direction of the crotch position.

And 3, carrying out secondary positioning on the liquid-tight bottom layer and the corresponding crotch position of the liquid-tight bottom layer, and then compositely connecting the elastic part/the absorption core layer formed in the step 2 on the liquid-tight bottom layer so that the elastic parts are positioned on two longitudinal side edges of the liquid-tight bottom layer corresponding to the crotch position.

The invention has the following beneficial effects: the elastic component with a certain stretch ratio is arranged between the liquid-tight bottom layer and the absorption core layer, and further, according to the human body characteristics and the trial evaluation result of consumers, the stretch ratio of 1.6-1.7 is optimized, so that the elastic component generates elastic force in the transverse direction of the crotch position, when the absorption product is in a use state, an arc-shaped narrow crotch structure is formed at the crotch position of the absorption product, and the arc-shaped narrow crotch structure enables the absorption product to be adaptive to the body of a user when in use.

The elastic components are further divided into two parts through a slitting process, and are symmetrically arranged at two longitudinal side edges of the crotch by taking the longitudinal and transverse center lines of the absorbent product as reference, or the side edges of each elastic component close to the leakage-proof separation edges extend to the base part of the leakage-proof separation edges along the width direction of the absorbent product, so that the formed arc-shaped narrow crotch structure is more suitable for the dynamic activity of a user, has the advantages of body fitting and comfort in wearing and good dynamic close-fitting effect, avoids the discomfort and discomfort of the existing absorbent product in the using process, is easy to continuously rub the skin of the legs of the wearer, and particularly avoids the technical problem that after the absorbent product drops due to the self weight of liquid absorption, scratches or even red and swollen inflammation easily appear on the skin of infants.

Drawings

Fig. 1 is a schematic structural view of a conventional absorbent article.

Figure 2 is a schematic view of a construction of a fit curved narrow crotch absorbent article.

Figure 3 is a schematic view of the elastic film being positioned in the center area of the absorbent core layer in a position corresponding to the crotch portion.

Fig. 4 is a schematic structural view taken along a-a of fig. 3.

FIG. 5 is a schematic view of the elastic nonwoven being symmetrically disposed on both longitudinal sides of the absorbent core layer at a location corresponding to the crotch portion.

Fig. 6 is a schematic structural view taken along B-B of fig. 5.

Figure 7 is a schematic view of the structure of an absorbent article with elastic members extending laterally to the bases of the containment barriers.

FIG. 8 is a schematic structural view taken along C-C of FIG. 7.

FIG. 9 is a schematic view of longitudinally spaced apart elastomeric members.

Fig. 10 is a schematic flow chart of positioning of the absorbent article of example 1.

Fig. 11 is a schematic view of the positioning process of the absorbent article of example 2.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

As shown in fig. 1, the conventional absorbent article includes a liquid-permeable top sheet 5, a liquid-impermeable back sheet 1, and an absorbent core layer 4 disposed between the liquid-permeable top sheet and the liquid-impermeable back sheet. In addition, on both longitudinal sides of the absorbent article, leakage barriers 3 are provided, respectively, as well as a closure system and an elastic system, such as an elastic waist band, provided for wearing and comfort. Wherein, the liquid-tight bottom layer 1 is formed by compounding a breathable bottom film 11 and a spun-bonded non-woven fabric 12. However, the existing absorbent product has the problems of discomfort and discomfort in the using process, the skin of the legs of a wearer is easy to rub continuously, and particularly after the absorbent product sags due to the self weight of absorbed liquid, the skin of an infant is easy to scratch or even become red, swollen and inflamed.

In order to solve the technical problems of the prior art, this embodiment provides an absorbent article provided with a fit curved narrow crotch portion, as shown in fig. 2-4, by the following embodiments:

an elastic film 71 connected with the absorption core layer is arranged at the crotch position between the liquid-impermeable bottom layer 1 and the absorption core layer 4, and the longitudinal length of the elastic film 71 is preferably 100-150 mm; the transverse width may be specifically selected according to the need for a curved narrow crotch portion. In the specific implementation process, the elastic film 71 is arranged in the central area of the crotch position with the stretch ratio of 1.6-1.7 times by taking the intersection point of the longitudinal center line and the transverse center line of the absorbent product as a reference, and is respectively connected with the absorbent core layer 4 and the liquid-impermeable bottom layer 1 into a whole. As a further embodiment of this embodiment, the absorbent core layer 4 is formed by laterally wrapping the composite core 41 with the core wrapping layer 42, the two longitudinal sides of the core wrapping layer 42 wrap the surface layer and the two longitudinal sides of the composite core 41 and then are bent inward toward the bottom layer, and then the elastic film 71, the core wrapping layer 42 and the liquid-impermeable bottom layer 1 are compositely connected into a whole through a hot melt adhesive layer.

The technical effect of this embodiment is that the elastic film 71 as an elastic member can generate an elastic force in the transverse direction of the crotch portion of the absorbent article, and when the absorbent article is in a free-relaxed or in-use state, an arc-shaped narrow crotch structure is formed at the crotch portion of the absorbent article, and the arc-shaped narrow crotch structure enables the absorbent article to adapt to the body of the user when in use, so that the absorbent article is more comfortable and comfortable to wear, and the dynamic fit effect is better.

As shown in fig. 2 and 10, the present embodiment provides a method for manufacturing an absorbent article having a proper curved narrow crotch portion, which comprises a two-time positioning process, comprising the steps of:

step 1, connecting a PE breathable film 11 and a spun-bonded non-woven fabric 12 into a liquid-tight bottom layer 1 in a composite manner;

and 2, with the longitudinal center line, the transverse center line and the cross points of the longitudinal center line and the transverse center line of the absorbent product as references, performing first positioning 10, namely positioning 1, such as infrared positioning, on the liquid-impermeable bottom layer 1 and the corresponding crotch position of the liquid-impermeable bottom layer, and then stretching the elastic film 71 to a certain stretching ratio to be compositely connected on the liquid-impermeable bottom layer 1, so that the elastic film 71 is positioned in the central area corresponding to the crotch position, and the elastic film 71 generates elastic force in the transverse direction of the crotch position.

And 3, carrying out second positioning 20, namely positioning 2, on the elastic film 71 or the composite bottom layer formed by the elastic film and the liquid-tight bottom layer, and then compositely connecting the absorbent core layer 4 on the elastic film 71 or/and the composite bottom layer.

Example 2

As shown in fig. 5 to 6, this embodiment is different from embodiment 1 in that it provides a fit curved narrow crotch portion of an absorbent article by:

the absorption core layer 4 is formed by laterally wrapping the composite core 41 by the core wrapping layer 42, and the two longitudinal side edges of the core wrapping layer 42 wrap the surface layer and the two longitudinal side edges of the composite core 41 and then are bent inwards towards the bottom layer.

In the present embodiment, an elastic nonwoven fabric (i.e., elastic nonwoven fabric) is used as the elastic member. Specifically, an elastic non-woven fabric connected with the absorption core layer and the liquid-tight bottom layer is arranged at the crotch position between the liquid-tight bottom layer and the absorption core layer, and the longitudinal length of the elastic non-woven fabric is 150-200 mm; the transverse width may be specifically selected according to the need for a curved narrow crotch portion. In the specific implementation process, the elastic non-woven fabric is cut into a first elastic non-woven fabric 72A and a second elastic non-woven fabric 72B, the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B are arranged with the longitudinal central line and the transverse central line of the absorbent product as references, the distance between the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B is 10-60mm, the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B are symmetrically arranged at two longitudinal side edges of the crotch position with the stretch magnification of 1.6-1.7 times, and then the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B are respectively and compositely connected with the core wrapping layer 42 and

the technical effect of the embodiment is that the first elastic nonwoven 72A and the second elastic nonwoven 72B can respectively generate elastic force in the transverse direction of the crotch position of the absorbent article as elastic components, when the elastic force makes the absorbent article in a free relaxation or use state, an arc-shaped narrow crotch structure is formed at the crotch position of the absorbent article, and the arc-shaped narrow crotch structure makes the absorbent article adapt to the body of a user when in use, so that the absorbent article is more comfortable and comfortable to wear, and the dynamic close fitting effect is better.

As shown in fig. 11, the present embodiment provides a method of manufacturing an absorbent article having a tailored curved narrow crotch portion, comprising a two-pass positioning process comprising the steps of:

step 1, laterally wrapping the composite core 41 by using a core wrapping layer 42 to form an absorption core layer.

And 2, with the longitudinal center line, the transverse center line and the cross points of the absorbent product as references, performing first positioning 30, namely positioning 1, such as infrared positioning, on the absorbent core layer and the corresponding crotch position, then cutting the elastic non-woven fabric into a first elastic non-woven fabric 72A and a second elastic non-woven fabric 72B, respectively stretching to a certain stretching ratio, and then symmetrically arranging the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B on the two longitudinal side edges of the absorbent core layer corresponding to the crotch position, so that the first elastic non-woven fabric 72A and the second elastic non-woven fabric 72B respectively generate elastic force in the transverse direction of the crotch position.

And 3, carrying out second positioning 40, namely positioning 2, on the liquid-impermeable bottom layer 1 and the corresponding crotch position, and then compositely connecting the elastic non-woven fabric/absorption core layer formed in the step 2 to the liquid-impermeable bottom layer 1 so that the elastic non-woven fabric is positioned on two longitudinal side edges of the liquid-impermeable bottom layer corresponding to the crotch position.

And 4, after the steps of forming the liquid-permeable top layer and the leakproof isolation edges are sequentially carried out, when the first elastic non-woven fabric and the second elastic non-woven fabric enable the absorbent product to be in a free loose or use state, an arc-shaped narrow crotch structure is formed at the crotch position of the absorbent product.

Example 3

This example provides a further detailed description of example 2. As shown in fig. 7-8, the absorbent article is further provided with a left leakage preventing barrier 61 and a right leakage preventing barrier 62 extending in the longitudinal direction on both sides in the width direction of the absorbent article, each leakage preventing barrier comprising a base portion, a free portion connected to the base portion and located at the upper end of the base portion, and a stretchable portion connected to the free portion and located at the upper end of the free portion, specifically, the left leakage preventing barrier 61 is provided with a base portion 63, and the right leakage preventing barrier 62 is provided with a base portion 64.

The structural characteristics of this embodiment lie in: the first elastic nonwoven 73C extends to the base 63 of the left leakage barrier 61 in the widthwise direction of the absorbent article, near the side of the left leakage barrier 61, while the second elastic nonwoven 73D extends to the base 64 of the right leakage barrier 62 in the widthwise direction of the absorbent article, near the side of the right leakage barrier 62.

Example 4

This example further provides a specific embodiment of the elastic member. The embodiment uses elastic yarn, such as spandex yarn and oak root strip, as the elastic component. As a specific embodiment, the elastic threads are arranged in the central area or two sides of the crotch position, are arranged at intervals in the longitudinal direction, and are compositely connected with the absorption core layer and the liquid-tight bottom layer with the stretch ratio of 1.6-1.7 times.

As shown in fig. 9, the present embodiment may further include an elastic glue coating as the elastic component, specifically, the elastic glue coating is composed of strip-shaped elastic glue coatings 74A, strip-shaped elastic glue coatings 74B, and strip-shaped elastic glue coatings 74C arranged at intervals in the longitudinal direction, and the strip-shaped elastic glue coatings arranged at intervals are disposed in the central area or both sides of the crotch position, and are compositely connected with the absorbent core layer and the liquid-impermeable back layer.

The elastic yarn and elastic glue coating of this example are suitable for use in examples 1-3 and are prepared as described in example 1 or example 2.

Example 5

In this example, a perforated PE film was used as an elastic member, and the other points are the same as in example 1, example 2, or example 3. The perforated PE film of this example was suitable for use in examples 1-3 and was prepared as in example 1 or example 2.

Performance evaluation test

1. Evaluation of fitness and comfort:

the method is characterized in that 10 test products of the absorbent product with the proper arc-shaped narrow crotch part and 10 comparative samples are combined into a test product, 20 test users are recruited by arranging substances, and the use conditions of the test products and the comparative samples of the absorbent product are required to be recorded accurately, and the method comprises the following steps: whether shank friction, red swelling condition appear, whether appear seriously tenesmus, rise the fault condition that sticks together after the imbibition, fit the whole evaluation of body travelling comfort.

2. Test samples:

l-shaped absorbent article test articles prototyped according to examples 1-5; a commercial L-shaped conventional absorbent article having a composite core was used as a comparative sample.

3. The test results were as follows:

the evaluation results of the overall evaluation of fit comfort are defined as follows: excellent > better > general.

While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An absorbent article provided with a fit arc-shaped narrow crotch portion, comprising a liquid-impermeable bottom layer, an absorbent core layer, characterized in that: the crotch position between the liquid-tight bottom layer and the absorption core layer and corresponding to the absorption product in the using state is provided with an elastic part connected with the absorption core layer, the elastic part generates elastic force in the transverse direction of the crotch position, when the absorption product is in a free relaxation or using state, the arc-shaped narrow crotch structure is formed at the crotch position of the absorption product, and the arc-shaped narrow crotch structure enables the absorption product to be adaptive to the body of a user in the using state.

2. An absorbent article provided with a tailored curved narrow crotch portion according to claim 1, characterized in that: the elastic component is arranged in the central area of the crotch and is respectively connected with the absorption core layer and the liquid-tight bottom layer into a whole.

3. An absorbent article provided with a tailored curved narrow crotch portion according to claim 1, characterized in that: the elastic parts are composed of a first elastic part and a second elastic part, and the first elastic part and the second elastic part are symmetrically arranged at two longitudinal side edges of the crotch and are connected with the absorption core layer and the liquid-tight bottom layer into a whole.

4. An absorbent article provided with a tailored curved narrow crotch portion according to claim 3, characterized in that: the absorbent product is also provided with leakage-proof separation edges, and the side edges of each elastic component close to the leakage-proof separation edges extend to the base parts of the leakage-proof separation edges along the width direction of the absorbent product.

5. An absorbent article provided with a body-fitted curved narrow crotch portion according to claim 3 or 4, wherein: the distance between the first elastic part and the second elastic part is 10-60 mm.

6. An absorbent article provided with a body-fitted curved narrow crotch portion according to any one of claims 1 to 4, wherein: the stretch ratio of the elastic component is 1.2-2.2 times, and the longitudinal length is 50-300 mm.

7. An absorbent article provided with a tailored curved narrow crotch portion according to claim 6, characterized in that: the stretch ratio of the elastic component is 1.6-1.7 times.

8. An absorbent article provided with a body-fitted curved narrow crotch portion according to any of claims 1-4 and 7, wherein: the elastic component is an elastic film, an elastic non-woven fabric, an elastic wire, an elastic glue coating or a perforated PE film.

9. Method for manufacturing an absorbent article provided with a body-fitting curved narrow crotch portion according to any of claims 1-9, comprising a two-stage positioning process, comprising the steps of:

step 1, connecting a PE breathable film and a spun-bonded non-woven fabric into a liquid-tight bottom layer in a composite manner;

step 2, taking the longitudinal center line, the transverse center line and the intersection point of the longitudinal center line and the transverse center line of the absorbent product as references, positioning the liquid-impermeable back layer and the corresponding crotch position of the liquid-impermeable back layer for the first time, then stretching the elastic part to a certain stretching ratio to be compositely connected on the liquid-impermeable back layer, so that the elastic part is positioned in the central area corresponding to the crotch position, or cutting the elastic part into a first elastic part and a second elastic part, respectively stretching to a certain stretching ratio and then symmetrically arranging the first elastic part and the second elastic part at the two longitudinal side edges of the crotch position, so that the elastic part generates elastic force in the transverse direction of the crotch position;

step 3, positioning the elastic component or a composite bottom layer formed by the elastic component and the liquid-tight bottom layer for the second time, and then compositely connecting the absorption core layer on the elastic component or/and the composite bottom layer;

10. Method for manufacturing an absorbent article provided with a body-fitting curved narrow crotch portion according to any of claims 1-9, comprising a two-stage positioning process, comprising the steps of:

step 1, laterally wrapping a composite core body by using a core body wrapping layer to form an absorption core layer;

step 2, taking the longitudinal center line, the transverse center line and the cross points of the longitudinal center line and the transverse center line of the absorbent product as references, positioning the absorbent core layer and the corresponding crotch position for the first time, then stretching the elastic component to a certain stretching ratio and then connecting the elastic component below the core body wrapping layer corresponding to the crotch position in a compounding manner to enable the elastic component to be positioned in the central area corresponding to the crotch position, or cutting the elastic component into a first elastic component and a second elastic component, respectively stretching the elastic components to a certain stretching ratio and then symmetrically arranging the elastic components at the two longitudinal side edges of the absorbent core layer corresponding to the crotch position to enable the elastic components to generate elastic force in the transverse direction of the crotch position;

step 3, carrying out second positioning on the liquid-tight bottom layer and the corresponding crotch position thereof, and then compositely connecting the elastic part/the absorption core layer formed in the step 2 on the liquid-tight bottom layer so that the elastic parts are positioned on two longitudinal side edges of the liquid-tight bottom layer corresponding to the crotch position;