Absorption product with bubble cavities and production process thereof

Abstract

The absorption product comprises an absorption area, a front waist area and a rear waist area, the front waist area and the rear waist area are arranged at the ends of the absorption area, the absorption area comprises a surface layer, a bottom layer and an absorption core body, the bottom layer is formed by clamping elastic spandex filaments between a first bottom layer and a second bottom layer, and the absorption core body is made of elastic spandex filaments. Wherein at least one of the first bottom layer and the second bottom layer is of a composite structure, the composite structure is composed of a low-gram-weight bonding layer and a high-gram-weight foaming layer, the foaming layer and the bonding layer are discontinuously compounded through hot rolling or ultrasonic waves, and a bubble cavity is formed through the fluffy structure of the foaming layer. The bubble cavities can effectively reduce friction between the waistline structure and a human body, a gap between every two adjacent bubble cavities can play a role in ventilation, the waistline is prevented from being completely attached to the human body, the comfort during use is improved, the end faces of the two sides of the bonding layer are compounded with the foaming layer and the second bottom layer respectively, and the foaming layer and the second bottom layer are compounded. The hard touch feeling when a human body is in contact with the bonding layer is effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of absorbent products, in particular to an absorbent product with a bubble cavity and a production process thereof. Background Art

[0002] Diapers can generally be divided into two categories: pull-up pants and adhesive pants. Pull-up pants generally use spandex as the component structure of the waistline, and use its own elastic force to tighten the diaper around the user's waist for wearing. The elastic spandex thread is a thin wire structure, which will cause a strong sense of pressure on the user's skin. Over time, it will produce more obvious marks. For infants and young children, it may even cause redness, swelling and allergies of the skin.

[0003] Currently, there are many types of pull-up pants on the market with improved waist structures. They use a structure with multiple cavities distributed within the waist of the pull-up pants, so as to cushion the elastic contraction of the elastic threads inside the pull-up pants. However, the cushioning effect of most waists with such cavity structures is not obvious, and even affects the breathability, resulting in low comfort when used. Summary of the invention

[0004] In view of the technical defects existing in the background technology, the present invention proposes an absorbent product with bubble cavity and its production process, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: An absorbent product with a bubble cavity, comprising an absorbent area, a front waist area and a back waist area arranged at the end of the absorbent area, the absorbent area comprising a surface layer, a bottom layer and an absorbent core sandwiched between the surface layer and the bottom layer, the ends of the surface layer and the bottom layer extend away from the absorbent core to form the front waist area and the back waist area, the bottom layer is composed of a first bottom layer and a second bottom layer with elastic spandex yarn sandwiched therebetween, wherein at least one layer of the first bottom layer and the second bottom layer is a composite structure; The side of the bottom layer close to the surface layer is a composite structure, the interlayer of the composite structure is intermittently compositely bonded to form a bubble cavity, and a plurality of first elastic spandex yarns are sandwiched between the first bottom layer and the second bottom layer corresponding to the front waist area and the back waist area; The composite structure is formed by a bonding layer with a gram weight of M1 and a foaming layer with a gram weight of M2, and the first elastic spandex yarn is attached to the outer side of the bonding layer, wherein 3gsm≤M1<6gsm, 6gsm≤M2≤20gsm.

[0005] As an improvement of the above scheme, the bottom layer includes a first bottom layer close to the surface layer and a second bottom layer away from the surface layer, the first bottom layer is a composite structure, the second bottom layer is a single-layer structure, and the gram weight of the second bottom layer is M3, where 10gsm≤M3≤30gsm.

[0006] As an improvement of the above scheme, second elastic spandex yarns are sandwiched on both sides of the width direction of the absorption zone, the second elastic spandex yarns match the curvature of the side edges of the absorption zone, and the ends of the second elastic spandex yarns extend into the front waist zone and the back waist zone along the length direction of the absorption zone respectively.

[0007] As an improvement of the above solution, the adhesive tape formed by bonding the adhesive layer and the foaming layer extends along the width direction of the bottom layer and is arranged at equal intervals in the length direction of the bottom layer, and the bubble cavity is formed between adjacent adhesive tapes.

[0008] As an improvement of the above solution, the first elastic spandex yarn extends along the width direction of the bottom layer and is arranged at equal intervals along the width direction of the front waist area and the back waist area. The first elastic spandex yarn is stretched and bonded between the first bottom layer and the second bottom layer.

[0009] As an improvement of the above solution, the end of the second bottom layer is folded toward the human body, and the second bottom layer is bonded and fixed to the end surface of the surface layer facing the human body.

[0010] As an improvement of the above solution, both the first bottom layer and the second bottom layer are composite structures, and the first bottom layer and the second bottom layer have the same gram weight.

[0011] As an improvement of the above scheme, the outer edge of the surface layer is bonded and fixed to the bottom layer, the absorbent core is bonded to the end surface of the bottom layer facing the surface layer and aligned with the central axis of the length direction of the absorption area, and the ends of the absorbent core extend into the front waist area and the back waist area respectively.

[0012] A process for producing an absorbent product having a bubble cavity comprises the following steps; Step S1: The second bottom layer is unrolled and transported; the second bottom layer has a length direction along the transport direction and a width direction perpendicular to the transport direction, a plurality of absorbent product bodies are arranged along the length direction of the second bottom layer, and a front waist region, an absorbent region and a back waist region are arranged along the width direction of the second bottom layer and aligned with the absorbent product bodies; Step S2: Laying out spandex yarns; laying out the first elastic spandex yarns at a position corresponding to the front waist region of the second bottom layer, and laying out the second elastic spandex yarns at a position corresponding to the back waist region of the second bottom layer; Step S3: unwinding and transmitting the first bottom layer; the first bottom layer has a length direction along the transmission direction and a width direction perpendicular to the transmission direction, and the first bottom layer is aligned with the second bottom layer on both sides of the width; Step S4: Compounding by a compounding roller: Compounding and bonding the first bottom layer and the second bottom layer by a compounding roller to obtain a bottom layer with a composite structure; Step S5: Cutting into individual products; Cutting into individual absorbent products on the bottom layer by a knife roller; In step S1 and step S3, at least one of the first bottom layer (501) and the second bottom layer (502) is a prefabricated composite structure having a bubble cavity; As an improvement of the above solution, the composite structure is formed by combining the foaming layer with any one side end surface of the bottom layer; The adhesive tape is formed by welding from the blister layer toward the adhesive layer through one of hot rolling and ultrasonic wave, and the area of ​​the blister layer where the adhesive tape is not formed is bulged to form the bubble cavity.

[0013] The beneficial effect of the present invention is that the foaming layer and the adhesive layer are intermittently compounded by hot rolling or ultrasonic waves, and a bubble cavity is formed by the fluffy structure of the foaming layer itself. The bubble cavity can effectively reduce the friction between the waist structure and the human body. The gap between two adjacent bubble cavities can play a breathable role, thereby preventing the waist from completely fitting the human body and increasing the comfort during use. In the bottom layer, the gram weight of the foaming layer and the second bottom layer is greater than the gram weight of the adhesive layer, which can prevent the glue of the adhesive layer from penetrating into the end surface of the bubble cavity and the surface layer on the side that fits the human body, thereby affecting the performance of the trouser body. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the thickness direction structure of the first embodiment of the present invention.

[0015] Figure 2 It is a schematic diagram of the thickness direction structure of the first embodiment of the present invention before the end is folded.

[0016] Figure 3 It is a schematic diagram of the thickness direction structure after the end portion is folded according to the first embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the positions of the absorption zone, the front waist zone and the back waist zone of the first embodiment of the present invention.

[0018] Figure 5 This is a schematic diagram of the thickness direction structure of the second embodiment of the present invention.

[0019] Figure 6 It is a schematic diagram of the thickness direction structure after the end portion is folded according to the second embodiment of the present invention.

[0020] Figure 7 It is a schematic diagram of the distribution structure of the foaming layer, the adhesive layer and the first elastic spandex yarn of the present invention.

[0021] Figure 8 It is a schematic diagram of the distribution structure of the surface layer and the bottom layer of the present invention.

[0022] Fig. 9 Schematic diagram of the adhesive tape structure of the present invention Figure 1 .

[0023] Fig.10 Schematic diagram of the adhesive tape structure of the present invention Figure 2 .

[0024] Among them: absorption area 1, front waist area 2, back waist area 3, surface layer 4, bottom layer 5, first bottom layer 501, second bottom layer 502, foaming layer 503, adhesive layer 504, absorption core 6, bubble cavity 7, first elastic spandex yarn 8, adhesive tape 9, second elastic spandex yarn 10. DETAILED DESCRIPTION

[0025] The implementation modes of the present invention are described below in conjunction with the accompanying drawings and relevant embodiments. The implementation modes of the present invention are not limited to the following embodiments, and the present invention relates to relevant necessary components in the technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, an absorbent article with bubble cavities comprises an absorbent area 1, a front waist area 2 and a back waist area 3 arranged at the ends of the absorbent area 1, the absorbent area 1 comprises a surface layer 4, a bottom layer 5 and an absorbent core 6 sandwiched between the surface layer 4 and the bottom layer 5, the ends of the surface layer 4 and the bottom layer 5 extend in a direction away from the absorbent core 6 to form the front waist area 2 and the back waist area 3, the bottom layer 5 is composed of a first bottom layer 501 and a second bottom layer 502 sandwiched with elastic spandex yarn, wherein at least one layer of the first bottom layer 501 and the second bottom layer 502 is a composite structure; The side of the bottom layer 5 close to the surface layer 4 is a composite structure, and the interlayer of the composite structure is intermittently compositely bonded to form a bubble cavity 7, and a plurality of first elastic spandex yarns 8 are sandwiched between the first bottom layer 501 and the second bottom layer 502 corresponding to the front waist area 2 and the back waist area 3; The composite structure is formed by a bonding layer 504 with a gram weight of M1 and a foaming layer 503 with a gram weight of M2, and the first elastic spandex yarn 8 is attached to the outer side of the bonding layer 504, wherein 3gsm≤M1<6gsm, 6gsm≤M2≤20gsm.

[0027] Reference Figure 1 , Figure 2 and Figure 3In the waist structure of the present invention, the ends of the absorption area 1 are respectively provided with a front waist area 2 and a back waist area 3, the front waist area 2 is formed by the surface layer 4 and one end of the bottom layer 5 extending in one piece, the back waist area 3 is formed by the surface layer 4 and the other end of the bottom layer 5 extending in one piece, the extension lengths of the two ends of the bottom layer 5 are not less than the extension length of the surface layer 4, the bubble cavity 7 reduces the friction between the inner layer of the waist and the human body, and the bubble cavity 7 forms undulations on the end surface of the waist structure close to the human body to avoid the inner side of the waist completely fitting against the user's skin, and ventilation is carried out through the gap between two adjacent bubble cavities 7, thereby increasing the breathability of the absorbent product, avoiding stuffiness during use, and enhancing comfort.

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 It should be noted that, in the first embodiment of the present invention, the bottom layer 5 includes a first bottom layer 501 and a second bottom layer 502, the first bottom layer 501 is a composite structure, the second bottom layer 502 is a single-layer structure, the first bottom layer 501 is composed of a blister layer 503 on the side close to the surface layer 4 and an adhesive layer 504 on the side away from the surface layer 4, the blister layer 503 and the adhesive layer 504 are intermittently compositely bonded to form a bubble cavity 7, and an adhesive tape 9 is formed by bonding the end surface of the first bottom layer 501 or the end surface of the second bottom layer 502 through a bonding process, the adhesive tape 9 is scraped and extended along the width direction of the bottom layer 5, and is arranged at equal intervals along the length direction of the bottom layer 5, so as to form a plurality of bubble cavities 7 between the blister layer 503 and the adhesive layer 504; Specifically, the end face of the adhesive layer 504 facing the second bottom layer 502 is bonded with a first elastic spandex thread 8, and the first elastic spandex thread 8 is bonded and clamped between the first bottom layer 501 and the second bottom layer 502 after being stretched. After bonding, the first elastic spandex thread 8 shrinks, causing the first bottom layer 501 to shrink synchronously along the width direction, thereby forming a plurality of bubble cavities 7 extending along the length direction of the absorbent product on the bottom end face of the bottom layer 5.

[0029] Reference Figure 5 and Figure 6 In the second embodiment of the present invention, the first bottom layer 501 and the second bottom layer 502 are both composite structures, the first bottom layer 501 and the second bottom layer 502 have the same weight, and the second bottom layer 502 and the first bottom layer 501 are symmetrically arranged along the thickness direction of the first elastic spandex yarn 8; Reference Figure 3 and Figure 6It should be noted that, in the third embodiment of the present invention, the end of the second bottom layer 502 in the length direction is folded toward the human body side to cover the end of the surface layer 4, forming undulations on the end surface of the waist structure close to the human body, thereby preventing the inner side of the waist from completely fitting against the user's skin and increasing the breathability of the waist. Furthermore, in the above scheme, the bottom layer 5 includes a first bottom layer 501 close to the surface layer 4 and a second bottom layer 502 away from the surface layer 4, the first bottom layer 501 is a composite structure, the second bottom layer 502 is a single-layer structure, and the gram weight of the second bottom layer 502 is M3, wherein 10gsm≤M3≤30gsm.

[0030] Furthermore, in the above scheme, a second elastic spandex yarn 10 is sandwiched on both sides of the absorption zone 1 in the width direction, the second elastic spandex yarn 10 matches the curvature of the side edge of the absorption zone 1, and the ends of the second elastic spandex yarn 10 extend into the front waist zone 2 and the back waist zone 3 along the length direction of the absorption zone 1 respectively.

[0031] Reference Figure 4 It should be noted that the two sides of the absorption zone 1 in the width direction are leg areas, and the second elastic spandex yarn 10 is provided in the length direction of the leg area. The second elastic spandex yarn 10 is sandwiched between the first bottom layer 501 and the second bottom layer 502. The second elastic spandex yarn 10 is bonded to the first bottom layer 501 after stretching. After bonding, the second elastic spandex yarn 10 shrinks, so that the bubble cavity 7 corresponding to the position of the leg area forms a wrinkled belt. The bubble cavity 7 in the leg area can reduce the pressure on the user's leg area and improve the comfort of the leg area during use.

[0032] Reference Figure 1 Furthermore, in the above scheme, an adhesive tape 9 formed by bonding through a bonding process is provided on any opposite end surface between the adhesive layer 504 and the foaming layer 503, and the adhesive tape 9 extends along the width direction of the bottom layer 5 and is arranged at equal intervals in the length direction of the bottom layer 5, and the bubble cavity 7 is formed between adjacent adhesive tapes 9.

[0033] Furthermore, in the above scheme, the first elastic spandex yarn 8 extends along the width direction of the bottom layer 5 and is arranged at equal intervals along the width direction of the front waist area 2 and the back waist area 3. The first elastic spandex yarn 8 is stretched and bonded between the first bottom layer 501 and the second bottom layer 502.

[0034] Reference Figure 3 and Figure 6 Furthermore, in the above scheme, the ends of the first bottom layer 501 and the second bottom layer 502 are folded toward the human body, and the first bottom layer 501 and the end surface of the surface layer 4 facing the human body are bonded and fixed.

[0035] Furthermore, in the above scheme, the outer edge of the surface layer 4 is bonded and fixed to the bottom layer 5, the absorption core 6 is bonded to the end surface of the bottom layer 5 facing the surface layer 4 and aligned with the central axis of the absorption area 1 in the length direction, and the ends of the absorption core 6 extend into the front waist area 2 and the back waist area 3 respectively.

[0036] It should be noted that, in the bottom layer, the gram weight of the bubble layer 503 and the second bottom layer 502 is greater than the gram weight of the adhesive layer 504, which can prevent the glue of the adhesive layer 504 from penetrating into the bubble cavity 7 and the end surface of the surface layer 4 that is in contact with the human body, affecting the performance of the trousers.

[0037] A process for producing an absorbent product having a bubble cavity comprises the following steps; Step S1: The second bottom layer 502 is unrolled and transported; the second bottom layer 502 has a length direction along the transport direction and a width direction perpendicular to the transport direction, a plurality of absorbent product bodies are arranged along the length direction of the second bottom layer 502, and a front waist region 2, an absorbent region 1 and a rear waist region 3 are arranged along the width direction of the second bottom layer 502 and aligned with the absorbent product bodies; Step S2: Laying out spandex yarns; laying out the first elastic spandex yarns 8 at the position of the second bottom layer 502 corresponding to the front waist region 2, and laying out the second elastic spandex yarns 8 at the position of the second bottom layer 502 corresponding to the back waist region 3; Step S3: The first bottom layer 501 is unrolled and transported; the first bottom layer 501 has a length direction along the transport direction and a width direction perpendicular to the transport direction, and the first bottom layer 501 is aligned with the second bottom layer 502 on both sides of the width; Step S4: Compounding by a compounding roller: Compounding and bonding the first bottom layer 501 and the second bottom layer 502 by a compounding roller to obtain a bottom layer 5 having a composite structure; Step S5: Cutting into individual products; Cutting into individual absorbent products on the bottom layer by a knife roller; In step S1 and step S3 , at least one of the first bottom layer 501 and the second bottom layer 502 is a prefabricated composite structure having bubble cavities 7 .

[0038] Furthermore, in the above solution, the composite structure is formed by the foaming layer 503 and any one side end surface of the bottom layer 5; The adhesive tape 9 is formed by welding along the blister layer 503 toward the adhesive layer 504 through one of hot rolling and ultrasonic wave, and the area of ​​the blister layer 503 where the adhesive tape 9 is not formed is bulged to form the bubble cavity 7 .

[0039] In the first embodiment of the present invention, the bottom layer 5 includes a first bottom layer 501 and a second bottom layer 502, wherein the first bottom layer 501 is a composite structure and the second bottom layer 502 is a single-layer structure; In this embodiment, the first bottom layer 501 is composed of a foaming layer 503 on a side close to the surface layer 4 and an adhesive layer 504 on a side away from the surface layer 4. In step S3 of the first embodiment, the first bottom layer 501 having a composite structure is formed by online pre-compounding or offline pre-compounding. Specifically, the online pre-compounding is to unwind the foaming layer 503 and the adhesive layer 504 simultaneously through an unwinding device, and the foaming layer 503 and the adhesive layer 504 are composited to form a first bottom layer 501 with a composite structure by hot rolling or ultrasonic welding, and the first bottom layer 501 is directly conveyed to the composite roller in step S4 to be composited with the second bottom layer 502 to form the bottom layer 5; It should be noted that the welding method between the foaming layer 503 and the adhesive layer 504 includes hot rolling and ultrasonic welding. Specifically, the welding point moves from one side of the foaming layer 503 toward the adhesive layer 504 for welding, thereby forming an adhesive tape 9. The unwelded area forms the foaming layer 503, and the bubble cavity 7 is formed by utilizing the characteristics of the foaming layer 503 having fluffy fibers and large gaps.

[0040] In a second embodiment of the present invention, the first bottom layer 501 and the second bottom layer 502 are both composite structures. In this embodiment, the first bottom layer 501 is composed of a foaming layer 503 on a side close to the surface layer 4 and an adhesive layer 504 on a side away from the surface layer 4, and the second bottom layer 501 is composed of a foaming layer 503 on a side away from the surface layer 4 and an adhesive layer 504 on a side away from the surface layer 4; In the second embodiment, in step S1, a second bottom layer 502 having a composite structure is formed by an off-line pre-compounding method; Specifically, in the technical solution of off-line pre-combination of this embodiment, the foaming layer 503 and the adhesive layer 504 are simultaneously unwound by an unwinding device, and the foaming layer 503 and the adhesive layer 504 are composited to form a second bottom layer 502 with a composite structure by hot rolling or ultrasonic welding, and after being rolled up by a winding device, the roll is moved to the composite production line of the bottom layer 5, and the second bottom layer 502 with the foaming layer 503 on one side is unwound by the unwinding device with the surface facing downward; In the second embodiment, in step S3, a first bottom layer 501 having a composite structure is formed by online pre-compounding or offline pre-compounding; The online pre-combination in this embodiment is based on the same principle as that in the first embodiment, and no further explanation is given in this embodiment. The offline pre-combination of the first bottom layer 501 is based on the same principle as that of the second bottom layer 502 in this embodiment, except that the first bottom layer 501 is rolled up and moved to the composite production line of the bottom layer 5, and the first bottom layer 501 is unrolled with the surface of the blister layer 503 facing upwards by the unwinding device; like Figure 7 , Fig. 9 and Fig.10 As shown, it should be noted that the adhesive layer is a spunbond non-woven fabric, the blister layer is a spunbond non-woven fabric or a hot air non-woven fabric, and the adhesive tape 9 is formed by welding along the blister layer 503 toward the adhesive layer 504 by one of hot rolling and ultrasonic welding, and the area of ​​the blister layer 503 where the adhesive tape 9 is not formed is bulged to form the bubble cavity 7. Specifically, the adhesive tape 9 is one or a combination of more than one of point-shaped, strip-shaped and band-shaped, and bubble cavities 7 of different shapes can be formed through different arrangements, as well as bubble cavities 7 densely arranged in different areas, thereby achieving different breathability effects and fitting effects in local areas of the absorbent product.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An absorbent product having a bubble cavity, characterized in that: The invention comprises an absorption zone (1), a front waist zone (2) and a back waist zone (3) arranged at the ends of the absorption zone (1); the absorption zone (1) comprises a surface layer (4), a bottom layer (5) and an absorption core (6) sandwiched between the surface layer (4) and the bottom layer (5); the ends of the surface layer (4) and the bottom layer (5) extend in a direction away from the absorption core (6) to form the front waist zone (2) and the back waist zone (3); the bottom layer (5) is composed of a first bottom layer (501) and a second bottom layer (502) sandwiched with elastic spandex yarn, wherein at least one of the first bottom layer (501) and the second bottom layer (502) is a composite structure; The side of the bottom layer (5) close to the surface layer (4) is a composite structure, the interlayers of the composite structure are intermittently compositely bonded to form a bubble cavity (7), and a plurality of first elastic spandex yarns (8) are sandwiched between the first bottom layer (501) and the second bottom layer (502) at positions corresponding to the front waist region (2) and the back waist region (3); The composite structure is formed by combining an adhesive layer (504) with a grammage of M1 and a foaming layer (503) with a grammage of M2, and the first elastic spandex yarn (8) is attached to the outside of the adhesive layer (504), wherein 3gsm≤M1<6gsm, and 6gsm≤M2≤20gsm.

2. The absorbent product having bubble cavities according to claim 1, characterized in that: The bottom layer (5) comprises a first bottom layer (501) on a side close to the surface layer (4) and a second bottom layer (502) on a side away from the surface layer (4); the first bottom layer (501) is a composite structure, the second bottom layer (502) is a single-layer structure, and the gram weight of the second bottom layer (502) is M3, wherein 10gsm≤M3≤30gsm.

3. The absorbent article having bubble cavities according to claim 1, characterized in that: Second elastic spandex yarns (10) are sandwiched on both sides of the absorption zone (1) in the width direction, the second elastic spandex yarns (10) match the curvature of the side edges of the absorption zone (1), and the ends of the second elastic spandex yarns (10) extend into the front waist zone (2) and the back waist zone (3) respectively along the length direction of the absorption zone (1).

4. The absorbent article having bubble cavities according to claim 1, characterized in that: The adhesive layer (504) and the foaming layer (503) are bonded to form a plurality of adhesive tapes (9), the adhesive tapes (9) extending along the width direction of the bottom layer (5) and being arranged at equal intervals in the length direction of the bottom layer (5), and the bubble cavities (7) are formed between adjacent adhesive tapes (9).

5. The absorbent article having bubble cavities according to claim 1, characterized in that: The first elastic spandex yarn (8) extends along the width direction of the bottom layer (5) and is arranged at equal intervals along the width direction of the front waist region (2) and the back waist region (3); the first elastic spandex yarn (8) is stretched and bonded between the first bottom layer (501) and the second bottom layer (502).

6. The absorbent article having bubble cavities according to claim 1, characterized in that: The end of the second bottom layer (502) is folded toward the human body, and the second bottom layer (502) is bonded and fixed to the end surface of the surface layer (4) facing the human body.

7. The absorbent article having bubble cavities according to claim 1, characterized in that: The first bottom layer (501) and the second bottom layer (502) are both composite structures, and the first bottom layer (501) and the second bottom layer (502) have the same gram weight.

8. The absorbent article having bubble cavities according to claim 1, characterized in that: The outer edge of the surface layer (4) is bonded and fixed to the bottom layer (5), the absorbent core (6) is bonded to the end surface of the bottom layer (5) facing the surface layer (4) and aligned with the central axis of the absorption area (1) in the length direction, and the ends of the absorbent core (6) extend into the front waist area (2) and the back waist area (3) respectively.

9. A production process for an absorbent product having bubble cavities according to any one of claims 1 to 8, characterized in that: The steps include: Step S1: The second bottom layer (502) is unrolled for transmission; the second bottom layer (502) has a length direction along the transmission direction and a width direction perpendicular to the transmission direction; a plurality of absorbent product bodies are arranged along the length direction of the second bottom layer (502); a front waist region (2), an absorbent region (1) and a rear waist region (3) are arranged along the width direction of the second bottom layer (502) and aligned with the absorbent product bodies; Step S2: Laying out spandex yarns; laying out the first elastic spandex yarn (8) at a position of the second bottom layer (502) corresponding to the front waist region (2), and laying out the second elastic spandex yarn (8) at a position of the second bottom layer (502) corresponding to the back waist region (3); Step S3: the first bottom layer (501) is unrolled and transported; the first bottom layer (501) has a length direction along the transport direction and a width direction perpendicular to the transport direction, and the first bottom layer (501) and the second bottom layer (502) are aligned on both sides of the width; Step S4: Compounding by a compounding roller: Compounding and bonding the first bottom layer (501) and the second bottom layer (502) by a compounding roller to obtain a bottom layer (5) having a composite structure; Step S5: Cutting into individual products; Cutting into individual absorbent products on the bottom layer by a knife roller; In step S1 and step S3, at least one of the first bottom layer (501) and the second bottom layer (502) is a prefabricated composite structure having a bubble cavity (7); The composite structure is formed by combining the foaming layer (503) with any one end surface of the bottom layer (5); The adhesive tape (9) is formed by welding along the blister layer (503) toward the adhesive layer (504) through hot rolling or ultrasonic welding, and the area of ​​the blister layer (503) where the adhesive tape (9) is not formed is bulged to form the bubble cavity (7).

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