Disposable absorption article and preparation method thereof

Abstract

The invention discloses a disposable absorption article and a preparation method thereof.The disposable absorption article comprises an absorption article body and an elastic waistline, the absorption article body comprises an inner garment, the elastic waistline comprises a front waistline and a rear waistline, and the width of the rear waistline is larger than that of the front waistline, so that the rear waistline can be supported and pulled through the hip bone; the hip edge of the product has a pulling force, the actual wrapping area of the hip is increased, the hip is not prone to displacement even in the movement process, the wrapping area on the hip bone is increased, the stress is more uniform, and the pressure of the product on the hip bone is reduced. Meanwhile, by means of the design, a side seal at the sealing position of the front waistline and the rear waistline can be moved to the front waist, and the wearing comfort can be effectively improved. The middle front waistline and the rear waistline are sealed in a transmission mode in an inequilateral forming mode. In addition, the disposable absorption article is further provided with multiple leakage-proof structures, and the leakage-proof effect of the disposable absorption article is further improved.

Description

Technical Field

[0001] The invention relates to the field of disposable absorbent articles, in particular to a disposable absorbent article and a preparation method thereof. Background Art

[0002] Existing disposable products, such as baby pull-up pants, women's menstrual pants, adult incontinence pants, etc., exert great pressure on both sides of the human body (i.e., hip bones), have poor dynamic leakage prevention effects, and cannot meet the leakage prevention needs in a large number of exercise situations. Since the edge of the elastic material where the rear buttocks are located has no support, it cannot fully support people with smaller hip circumferences. Due to the characteristics of elastic materials, the material will shrink toward the center of the product, resulting in a poor sense of coverage during actual wearing. During exercise, due to the continuous movement of the buttocks, the product at the edge of the buttocks is more likely to shrink toward the middle, thereby reducing the coverage area. At the same time, the side seals of existing absorbent pants are mostly set on both sides of the human body, i.e., on the hip bones, and the sealing technology of the side seals is mostly heat sealing and ultrasonic sealing. The non-woven fabric is melt-bonded by heating, resulting in a high hardness of the side seals. Since the hip bones are convex in shape, the side seals are prone to rubbing against the hip bones during exercise, which can cause a foreign body sensation. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] The present invention provides the following technical solutions to solve one or more of the above technical problems: A disposable absorbent product comprises an absorbent product body and an elastic waistband, wherein the absorbent product body comprises an inner garment, and the elastic waistband comprises a front waistband and a rear waistband, wherein the width of the rear waistband is greater than that of the front waistband, so that the rear waistband can be supported and pulled by the hip bone, so that there is a pulling force at the edge of the buttocks of the product, thereby increasing the actual wrapping area of ​​the buttocks, making it less likely to be displaced even during exercise, and increasing the wrapping area of ​​the hip bone, making the absorption more uniform and reducing the pressure of the product on the hip bone.

[0005] Disposable absorbent articles may be two-piece or three-piece.

[0006] In some embodiments, the elastic waist comprises an outer lining fabric, an inner lining fabric, and an elastic material. The elastic material is one or more of elastic rubber band, elastic film, and elastic non-woven fabric; The outer lining cloth and the inner lining cloth are one or more of spunbonded nonwoven fabric, hot air nonwoven fabric, hot pressed nonwoven fabric and meltblown nonwoven fabric.

[0007] In some embodiments, The front waistline and the back waistline are connected to form a side seal, and the side seal is located at the front waist; The stretching ratio of the elastic material in the front waistline is greater than that in the back waistline, thereby further increasing the pulling force of the front waist on the back waist, thereby increasing the unequal side effect and increasing the pulling force on the elastic material at the buttocks to achieve a tighter wrapping feeling.

[0008] In some embodiments, the elastic material in the front waistline includes a first elastic material corresponding to the waist, and no elastic material corresponding to the abdomen; the elastic material in the back waistline includes a second elastic material corresponding to the waist and the abdomen. This design makes the non-equilateral effect more obvious.

[0009] In some embodiments, the inner packaging includes a surface non-woven fabric, an absorbent body, and a bottom waterproof layer. The main body of the absorbent product is provided with a leak-proof mechanism, which includes one or more of the six leak-proof structures. The six leak-proof structures are specifically as follows: The first anti-leakage structure comprises three-dimensional guards arranged on both sides of the absorbent body, and the three-dimensional guards are arranged on the upper layer of the surface non-woven fabric; The second leak-proof structure, the three-dimensional guard is folded outward to form a folded portion, which increases the overall height of the three-dimensional guard to form the second leak-proof structure; The third anti-leakage structure includes a first auxiliary elastic material folded on both sides of the surface non-woven fabric, and the first auxiliary elastic material is used to make both sides of the surface non-woven fabric stand up, thereby preventing liquid from overflowing; The fourth leak-proof structure is: the two sides of the surface non-woven fabric are not bonded to the three-dimensional protective enclosure and the bottom waterproof layer to form a suspended core, and a first opening is formed between the surface non-woven fabric, the three-dimensional protective enclosure and the bottom waterproof layer. Liquid can enter the space between the suspended core and the bottom waterproof layer from the first opening for temporary storage and then be reabsorbed; The fifth anti-leakage structure includes leg guardrails arranged on both sides of the lower layer of the bottom waterproof layer, and the leg guardrails are provided with a second auxiliary elastic material to improve the covering feeling of the legs; The sixth anti-leakage structure includes an anti-rear leakage pocket arranged at the rear end of the interior, a third auxiliary elastic material is arranged in the anti-rear leakage pocket, and a second opening is arranged on the front side of the anti-rear leakage pocket to prevent liquid from leaking backwards.

[0010] In some embodiments, 1-2 strips of the first auxiliary elastic material are respectively folded on both sides of the surface non-woven fabric; The leg guardrail is provided with 2-3 strips of second auxiliary elastic material; The number of strips of the third auxiliary elastic material provided in the rear leakage prevention pocket is greater than or equal to 3, the width L of the second opening is greater than or equal to the spacing L1 between the three-dimensional guardrails on both sides, and the height H1 of the second opening is greater than or equal to 1 / 3 of the width H covered by the interior; The first auxiliary elastic material, the second auxiliary elastic material and the third auxiliary elastic material are one or more of elastic rubber bands, elastic films and elastic non-woven fabrics.

[0011] In some embodiments, the absorbent body is a double layer, which includes an upper absorbent body and a lower absorbent body. The upper absorbent and the lower absorbent are composite cores formed by wrapping a wood pulp polymer mixture with toilet paper or non-woven fabric or absorbent paper or dust-free paper; The ends of both sides of the surface non-woven fabric are wrapped down onto the bottom waterproof layer.

[0012] A method for preparing a disposable absorbent article, which can be used to prepare the above-mentioned disposable absorbent article, comprises the following steps: Preparation of interior decoration; Preparing a front waistline and a back waistline; Preparing a preliminary product, and compounding the front waistline and the rear waistline with the inner decoration to form a preliminary product; The primary product is formed by using an unequal-sided forming method. The process of the unequal-sided forming method is that the front waistline and the back waistline enter different conveying tracks respectively, the front waistline is in a straight state throughout the process, the back waistline enters the auxiliary track, the two side ends of the back waistline are arranged correspondingly to the two side ends of the front waistline, the back waistline and the front waistline are synchronously conveyed to the side sealing device, and the side sealing device is used to seal the two side ends of the correspondingly arranged back waistline with the two side ends of the front waistline respectively; Cutting, folding and packaging.

[0013] In some embodiments, the auxiliary track includes two guide rollers that can move up and down and left and right. The height between the guide rollers and the rear waistline horizontal conveying track is H3, the spacing between the two guide rollers is L3, and the width of the rear waistline - the width of the front waistline = L3 + 2*H3 / cosθ.

[0014] In some embodiments, when preparing the front waistline and the back waistline, the outer lining cloth is compounded with the elastic material and then folded inwards, and bonded to the corresponding inner lining cloth. The outer lining cloth corresponding to the back waistline covers the back of the inner garment and a third auxiliary elastic material is arranged at the tail, and then the outer lining cloth is folded again. When the rear waistline is combined with the inner garment, two sides of the inner garment and an end close to the rear waistline are fixed to the rear waistline to form a second opening.

[0015] Compared with the prior art, the invention has the advantages of being comfortable to wear, having good wrapping effect and good leak-proof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 is a schematic diagram of the development of disposable absorbent articles in some embodiments of the present invention; Figure 2 is a schematic diagram of the structure of a disposable absorbent article in some embodiments of the present invention; Figure 3 is a schematic diagram of the position of the side seals when the disposable absorbent article is worn in some embodiments of the present invention; Figure 4 Schematic diagrams of the development of disposable absorbent articles in other embodiments of the present invention; Figure 5 Schematic diagram of the structure of disposable absorbent articles in other embodiments of the present invention; Figure 6 A side view of a disposable absorbent article in some embodiments of the present invention; Figure 7 A front view of a disposable absorbent article in some embodiments of the present invention; Figure 8 Schematic diagram of the elastic waistline side edges being sealed in some embodiments of the present invention; Fig. 9 It is a schematic diagram of the internal structure in some embodiments of the present invention; Fig.10 It is a schematic diagram of the internal structure in some other embodiments of the present invention; Fig.11 is a schematic structural diagram of a fourth anti-leakage structure in some embodiments of the present invention; Fig.12 It is a schematic structural diagram of a rear leakage prevention pocket provided with a second opening in some embodiments of the present invention; Fig.13 A side view of a disposable absorbent article when the front and rear waist circumferences are consistent; Fig.14 The present invention is a front view of a disposable absorbent article when the front and rear waist circumferences are consistent. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual preparation, the three-dimensional dimensions of length, width and depth should be included.

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This embodiment provides a disposable absorbent article, which can be a two-piece or three-piece type. Figures 1 to 12 The content shown includes an absorbent article body and an elastic waistband. The absorbent article body includes an inner layer 6. The elastic waistband includes a front waistband 1 and a rear waistband 2. The width A of the rear waistband 2 is greater than the width B of the front waistband 1, that is, A+B is equal to the width of the product waistband, wherein the width A of the rear waistband 2 accounts for more than 50% of the width of the product waistband. This design allows the rear waistband 2 to be supported and pulled by the hipbones 9 on both sides of the human body, so that there is a pulling force 10 on the edge of the buttocks of the product, thereby increasing the actual wrapping area of ​​the buttocks, and it is not easy to cause displacement even during exercise. It also increases the wrapping area of ​​the hipbones 9 on both sides of the human body, making the force more even, reducing the pressure of the product on the hipbones 9 on both sides of the human body. Fig.13 and Fig.14 As shown, when the front and rear waist circumferences are the same, since the elastic material edge 7 where the rear hip is located has no support, it cannot fully support people with smaller hip circumferences. Due to the characteristics of elastic materials, the material will shrink toward the center of the product, as shown by arrow 8, resulting in poor coverage during actual wearing. During exercise, due to the continuous movement of the hips, the product at the edge of the hips is more likely to shrink toward the middle, thereby reducing the coverage area.

[0022] The above-mentioned elastic waistband may include an outer lining cloth, an inner lining cloth, and an elastic material. The above-mentioned elastic material may be one or more of elastic rubber bands (the denier of the rubber bands may be 120dtex-1100dtex), elastic films, and elastic non-woven fabrics (SBS block copolymer elastomers, POE polyolefin elastomers, TPU polyurethanes, EPdtexM ethylene propylene diene rubber elastomers and their compositions or modified products); the outer lining cloth and the inner lining cloth may both be one or more of spunbond non-woven fabrics, hot air non-woven fabrics, hot pressed non-woven fabrics, and melt-blown non-woven fabrics.

[0023] The front waist circumference 1 may include a first inner layer of nonwoven fabric 29 and a first outer layer of nonwoven fabric 30 , and the back waist circumference 2 may include a second inner layer of nonwoven fabric 31 and a second outer layer of nonwoven fabric 32 .

[0024] In some specific implementations, combined with Figures 1 to 3 As shown, the elastic material in the front waistline 1 may include a first elastic material 301 arranged corresponding to the waist and abdomen; the elastic material in the back waistline 2 may include a second elastic material 401 arranged corresponding to the waist and abdomen.

[0025] In some other specific implementations, combined with Figure 4 and Figure 5 As shown, the third elastic material 302 may be arranged only corresponding to the waist in the front waist circumference 1; the elastic material in the rear waist circumference 2 may include a fourth elastic material 402 arranged corresponding to the waist and abdomen, wherein the number of the third elastic material 302 and the fourth elastic material 402 arranged may be greater than or equal to 4, and the denier of the elastic band is 120dtex-1200dtex.

[0026] In some specific implementations, combined with Figures 1 to 7 As shown in the figure, by lengthening the width of the rear waistline 2 to make it wider than the width of the front waistline 1, the side seal 5 at the connection between the front waistline 1 and the rear waistline 2 is moved to the front waist, close to the inner wear 6, so as to reduce the foreign body sensation caused by the side seal 5.

[0027] In some specific implementations, the stretch ratio of the elastic material in the front waist circumference 1 is greater than the stretch ratio of the elastic material in the back waist circumference 2, thereby further increasing the pulling force 10 of the front waist on the back waist, thereby increasing the effect of unequal variation and increasing the pulling force 11 on the elastic material at the buttocks, achieving a tighter wrapping feeling.

[0028] In some specific implementations, combined with Figures 9 to 12 As shown, the inner garment 6 includes a surface nonwoven fabric 27, an absorbent body 28, and a bottom waterproof layer 17 (i.e., a bottom film), wherein the surface nonwoven fabric 27 may include two layers of nonwoven fabrics, namely, an upper surface nonwoven fabric 25 and a lower surface nonwoven fabric 26. The main body of the absorbent article is also provided with a leakproof mechanism, which includes one or more of six leakproof structures, which can be selected by the manufacturer as needed. The six leakproof structures are specifically as follows: The first anti-leakage structure includes a three-dimensional guard 12 arranged on both sides of the absorbent 28, the three-dimensional guard 12 is arranged on the upper layer of the surface non-woven fabric 27, and the three-dimensional guard 12 can be additionally provided with a fourth auxiliary elastic material 24 (the number of the fourth auxiliary elastic material 24 can be 2-4, the fourth auxiliary elastic material 24 can be an elastic rubber band, the stretch ratio can be 1.6-2.5, and the rubber band denier can be 470-780dtex); The second leak-proof structure is that the three-dimensional guard 12 is folded outward to form a folded portion 13, which increases the overall height of the three-dimensional guard to form the second leak-proof structure; The third anti-leakage structure includes a first auxiliary elastic material 14 (the number of the first auxiliary elastic material 14 provided may be 1-2, and the first auxiliary elastic material 14 may be an elastic rubber band) wrapped around both sides of the surface non-woven fabric 27, and the first auxiliary elastic material 14 forms a stand 15 on both sides of the surface non-woven fabric 27, thereby preventing liquid from overflowing outwards; The fourth leak-proof structure is: the two sides of the surface non-woven fabric 27 are not bonded to the three-dimensional protective enclosure 12 and the bottom waterproof layer 17, forming a suspended core 19, and a first opening 18 is formed between the surface non-woven fabric 27 and the three-dimensional protective enclosure 12 and the bottom waterproof layer 17. Liquid can enter from the first opening 18 between the suspended core 19 and the bottom waterproof layer 17 for temporary storage, and wait to be reabsorbed by the absorbent 28; The fifth anti-leakage structure includes leg guardrails 20 arranged on both sides of the lower layer of the bottom waterproof layer 17, and the leg guardrails 20 are provided with second auxiliary elastic materials 21 (the number of second auxiliary elastic materials 21 provided can be 2-3, and the second auxiliary elastic materials 21 can be elastic rubber bands) to improve the covering feeling of the legs; The sixth anti-leakage structure includes an anti-rear leakage pocket 22 arranged at the rear end of the inner clothing 6, wherein a third auxiliary elastic material 23 is arranged in the anti-rear leakage pocket 22 (the number of the third auxiliary elastic material 23 may be greater than or equal to 3, and the third auxiliary elastic material 23 may be an elastic rubber band), and a second opening is arranged on the front side of the anti-rear leakage pocket. The rear leakage of liquid is prevented by the arrangement of the anti-rear leakage pocket, wherein the width L of the second opening is greater than or equal to the spacing L1 between the three-dimensional guardrails on both sides, and the height H1 of the second opening is greater than or equal to 1 / 3 of the width H covered by the inner clothing 6.

[0029] The above-mentioned absorbent body 28 can be double-layered, namely an upper absorbent body and a lower absorbent body. Both the upper absorbent body and the lower absorbent body are composite cores formed by wrapping a wood pulp polymer mixture with toilet paper or non-woven fabric or absorbent paper or dust-free paper. The sizes and dimensions of the upper absorbent body and the lower absorbent body can be the same or different.

[0030] The ends of both sides of the surface non-woven fabric are wrapped down onto the bottom waterproof layer.

[0031] Taking a disposable absorbent product of a baby pull-up pants type, three-piece type, in which the elastic materials involved are all elastic rubber bands and which has the above six leak-proof structures as an example, the waist width of the disposable absorbent product is set to 780 mm, and the preparation method of the disposable absorbent product comprises the following steps: Preparation of inner garment 6: inner garment 6 comprises a bottom waterproof layer 17, a three-dimensional protective enclosure 12 located on the upper layer of the surface non-woven fabric 27, the three-dimensional protective enclosure 12 is provided with 2-4 fourth auxiliary elastic materials 24, the stretching ratio of the fourth auxiliary elastic material 24 is 1.6-2.5, and the elastic denier is 470-780dtex, forming a first layer of leak-proofing; the three-dimensional protective enclosure 12 is folded outward and the two ends are fixed to form a folded portion 13, thereby increasing the height H of the three-dimensional protective enclosure, forming a second layer of leak-proofing; the lower layer of the three-dimensional protective enclosure 12, the upper surface non-woven fabric 25 and the lower surface non-woven fabric 26 are formed into a surface non-woven fabric 27 by heat pressing or ultrasonic pressing, and 3D three-dimensional embossing can be formed, the surface non-woven fabric 27 wraps the absorbent 28, and the absorbent 28 can be a composite core composed of a double-layer absorbent, and the two side ends of the surface non-woven fabric 27 are wrapped to the bottom The surface non-woven fabric 27 is folded on the bottom waterproof layer 17, and 1-2 first auxiliary elastic materials 14 are arranged on both sides of the surface non-woven fabric 27, the stretch ratio of the first auxiliary elastic material 14 is 1.6-2.5, the elastic denier is 470-780dtex, the width of the surface non-woven fabric 27 after folding is greater than the absorbent 28, when the surface elastic elastic 14 shrinks, the two sides of the surface non-woven fabric 27 will stand up 15 to block the blood, forming a third layer of leakage prevention; the two sides of the surface non-woven fabric 27 are not bonded to the bottom waterproof layer 17, forming a suspended core 19, so that the blood enters the opening 18 formed between the surface non-woven fabric 27 and the bottom waterproof layer 17, thereby forming a fourth layer of leakage prevention; leg guardrails 20 are arranged on both sides of the lower layer of the bottom waterproof layer 17, and the leg guardrails 20 are provided with 2-3 second auxiliary elastic materials 21, thereby forming a fifth layer of leakage prevention; Prepare the front waist and back waist: the width A of the back waist 2 is greater than 50% of the product waist width, such as the width A of the back waist 2 is 450 mm, the width B of the front waist 1 is 330 mm, the front waist inner non-woven fabric 29, the outer non-woven fabric 30 and the back waist inner non-woven fabric 31, the outer non-woven fabric 32 are respectively compounded with elastic materials, the number of elastic bands of the elastic material is greater than or equal to 4, the elastic band denier is 120dtex-1200dtex, preferably 9 elastic bands with a denier of 800dtex; after compounding, O-cut is performed to form leg loops.

[0032] Prepare a preliminary product, and compound the front waistband 1 and the back waistband 2 with the inner garment 6 to form a preliminary product. The outer non-woven fabrics of the front and back waistbands are compounded with the elastic material and folded inwards to bond with the inner non-woven fabric. The second outer non-woven fabric 32 on the back waistband 2 covers the back of the inner garment 6 and 2-5 third auxiliary elastic materials 23 are arranged at the tail, with the elastic denier of 120dtex-1200dtex, preferably 3 elastics, with a denier of 800dtex, and the second outer non-woven fabric 32 is folded again. Combine Fig.11 and Fig.12The content shown in the figure is that when it is composited on the inner lining 6, only the glue application area on both sides and one end near the back waist is glued and fixed, and the remaining opening area is used as the second opening to form an anti-rear leakage pocket, wherein the length L of the second opening is greater than or equal to the spacing L1 between the two three-dimensional guards 12, and the height H1 of the second opening is greater than or equal to 1 / 3 of the thickness W of the anti-rear leakage pocket; The primary product is formed by an unequal-sided forming method. The process of the unequal-sided forming method is as follows: the front waistline 1 and the back waistline 2 enter different conveying tracks respectively, the front waistline 1 is in a straight state throughout the whole process, and the back waistline 2 enters the auxiliary track 33. The speed-changing track 33 can make the width A of the back waistline 2 larger than the width B of the front waistline 1 for "hiding" (that is, the hidden width = AB), so that the front waistline 1 and the back waistline 2 are in an equilateral state when entering the ultrasonic sealing device 34 (the side sealing device 34 can be directly implemented by an existing device or directly implemented by an existing technology, so it will not be described in detail here). The side sealing device 34 is used to seal the two side ends of the corresponding rear waistline 2 with the two side ends of the front waistline 1 respectively; the auxiliary track includes two guide rollers that can move up and down and left and right, the height between the guide roller and the rear waistline horizontal conveying track is H3, and the distance between the two guide rollers is L3. By adjusting the height H3 between the guide roller 35 and the rear waistline horizontal conveying track and the distance L3 between the two guide rollers 35, the rear waistline 2 can be in an equilateral state with the front waistline 1 when entering the side sealing device 34, and the width of the rear waistline - the width of the front waistline = L3 + 2*H3 / cosθ; Cutting, folding and packaging.

[0033] The above undisclosed matters can be directly implemented by using existing technologies, so they will not be elaborated here.

[0034] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A disposable absorbent article, comprising an absorbent article body and an elastic waist, wherein the absorbent article body comprises an inner garment, characterized in that: The elastic waistline includes a front waistline and a back waistline, and the width of the back waistline is greater than the width of the front waistline.

2. The disposable absorbent article according to claim 1, characterized in that: The elastic waistline comprises an outer lining fabric, an inner lining fabric, and an elastic material. The elastic material is one or more of elastic rubber band, elastic film, and elastic non-woven fabric; The outer lining cloth and the inner lining cloth are one or more of spunbonded nonwoven fabric, hot air nonwoven fabric, hot pressed nonwoven fabric and meltblown nonwoven fabric.

3. The disposable absorbent article according to claim 2, characterized in that: The front waistline and the back waistline are connected to form a side seal, and the side seal is located at the front waist; The stretch ratio of the elastic material in the front waistline is greater than the stretch ratio of the elastic material in the back waistline.

4. The disposable absorbent article according to claim 2, characterized in that: The elastic material in the front waistline includes a first elastic material arranged corresponding to the waist, and the elastic material in the back waistline includes a second elastic material arranged corresponding to the waist and abdomen.

5. The disposable absorbent article according to claim 1, characterized in that: The inner packaging includes a surface non-woven fabric, an absorbent body, and a bottom waterproof layer. The main body of the absorbent product is provided with a leak-proof mechanism, which includes one or more of six leak-proof structures. The six leak-proof structures are specifically as follows: The first anti-leakage structure comprises three-dimensional guards arranged on both sides of the absorbent body, and the three-dimensional guards are arranged on the upper layer of the surface non-woven fabric; The second anti-leakage structure, the three-dimensional guard is folded outward to form a folded portion, increasing the overall height of the three-dimensional guard to form the second anti-leakage structure; The third leakage-proof structure includes a first auxiliary elastic material folded on both sides of the surface non-woven fabric, and the first auxiliary elastic material is used to make both sides of the surface non-woven fabric stand up; The fourth leakproof structure is: the two sides of the surface non-woven fabric are not bonded to the three-dimensional protective enclosure and the bottom waterproof layer to form a suspended core, and a first opening is formed between the surface non-woven fabric and the three-dimensional protective enclosure and the bottom waterproof layer; The fifth anti-leakage structure includes leg guardrails arranged on both sides of the lower layer of the bottom waterproof layer, and the leg guardrails are provided with a second auxiliary elastic material; The sixth anti-leakage structure includes an anti-rear leakage pocket arranged at the rear end of the interior, a third auxiliary elastic material is arranged in the anti-rear leakage pocket, and a second opening is arranged on the front side of the anti-rear leakage pocket.

6. The disposable absorbent article according to claim 5, characterized in that: 1-2 strips of the first auxiliary elastic material are respectively folded on both sides of the surface non-woven fabric; The leg guardrail is provided with 2-3 strips of second auxiliary elastic material; The number of strips of the third auxiliary elastic material provided in the rear leakage prevention pocket is greater than or equal to 3, the width L of the second opening is greater than or equal to the spacing L1 between the three-dimensional guardrails on both sides, and the height H1 of the second opening is greater than or equal to 1 / 3 of the width H covered by the interior; The first auxiliary elastic material, the second auxiliary elastic material and the third auxiliary elastic material are one or more of elastic rubber bands, elastic films and elastic non-woven fabrics.

7. The disposable absorbent article according to claim 6, characterized in that: The absorbent is double-layered, consisting of an upper absorbent and a lower absorbent. The upper absorbent and the lower absorbent are composite cores formed by wrapping a wood pulp polymer mixture with toilet paper or non-woven fabric or absorbent paper or dust-free paper; The ends of both sides of the surface non-woven fabric are wrapped down onto the bottom waterproof layer.

8. A method for preparing a disposable absorbent article, characterized in that: The disposable absorbent article according to any one of claims 1 to 7 is prepared by a method for preparing a disposable absorbent article, and the method for preparing a disposable absorbent article comprises the following steps: Preparation of interior decoration; Preparing a front waistline and a back waistline; Preparing a preliminary product, and compounding the front waistline and the rear waistline with the inner decoration to form a preliminary product; The primary product is formed by using an unequal-sided forming method. The process of the unequal-sided forming method is that the front waistline and the back waistline enter different conveying tracks respectively, the front waistline is in a straight state throughout the process, the back waistline enters the auxiliary track, the two side ends of the back waistline are arranged correspondingly to the two side ends of the front waistline, the back waistline and the front waistline are synchronously conveyed to the side sealing device, and the side sealing device is used to seal the two side ends of the correspondingly arranged back waistline with the two side ends of the front waistline respectively; Cutting, folding and packaging.

9. The preparation method according to claim 8, characterized in that: The auxiliary track includes two guide rollers that can move up and down and left and right. The height between the guide rollers and the rear waistline horizontal conveying track is H3, the distance between the two guide rollers is L3, and the width of the rear waistline - the width of the front waistline = L3 + 2*H3 / cosθ.

10. The preparation method according to claim 8, characterized in that: When preparing the front waistline and the back waistline, the outer lining cloth is compounded with the elastic material and then folded inwards, and bonded with the corresponding inner lining cloth. The outer lining cloth corresponding to the back waistline covers the back of the inner garment and a third auxiliary elastic material is arranged at the tail, and then the outer lining cloth is folded again. When the rear waistline is combined with the inner garment, two sides of the inner garment and an end close to the rear waistline are fixed to the rear waistline to form a second opening.

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