Absorbent article and method of making same

Abstract

The invention discloses an absorption product and a preparation method thereof. The preparation method comprises the following steps: S1, preparing materials; the skin-attaching surfaces of the selected materials are made of cotton fibers, and the cotton fibers of the skin-attaching surface of the inner waistline and the chemical fibers of the non-skin-attaching surface of the inner waistline are prepared through a spunlace process; s2, waistline compounding is carried out, and an elastic waistline material is formed; s3, carrying out die cutting on the waistline material to cut out leg openings to form a waistline main body; s4, the absorbing core body fixes the crotch elastic yarn, intermittent glue is applied to channel gaps of the crotch elastic yarn at the two ends of the surface layer, the bottom film and the three-dimensional protective enclosure are compounded to form an interior, and the width of the interior is larger than that of the narrowest position of the waist main body after die cutting; s5, compounding the interior and the waistline main body; and S6, packaging. The inner waistline is made of a base material with cotton inside and chemical fiber outside, so that the defect that a sewing part is easy to crack is overcome; two ends of the surface layer are subjected to'accurate dispensing 'for leakage prevention, and side leakage of water-absorbing particles is prevented while air permeability is kept; the inner waistline is firstly cut and then assembled, so that the edge is covered by the cotton material, and the contact surface of the inner waistline and the human body is made of the cotton material.

Description

Technical Field

[0001] This application relates to the technical field of hygiene products, specifically to an absorbent article and its preparation method. Background Technology

[0002] Commonly used wearable absorbent products generally include overnight pants, disposable underwear, baby pull-ups, and adult pull-ups. These products come into direct contact with the human body and directly affect the wearer's comfort and skin health. With increasing consumer demand, pull-ups for babies and the elderly, as well as women's overnight pants, are being worn for longer periods, even during the day. The existing problem is that these products are thick, stuffy, and not breathable, resulting in extremely poor comfort during extended wear, especially in hot summers when they can cause excessive sweating and easily lead to allergies and other problems.

[0003] Current absorbent fabrics generally include an outer waistband, an inner waistband, a top layer, an absorbent core embedded within the top layer, and a three-dimensional protective layer. The absorbent core, top layer, three-dimensional protective layer, bottom membrane, and other materials are pre-prepared as an inner layer and then laminated with the inner and outer waistbands. However, most pants on the market currently use synthetic fibers for the parts in contact with the skin. A few products use pure cotton for the top layer of the core absorbent area. Cotton is less likely to cause allergies and is soft and comfortable against the skin. However, changing the material for other parts from synthetic fibers to cotton currently presents the following problems:

[0004] 1. The inner waistband of a traditional waistband is made of synthetic fiber and is sealed with ultrasonic waves or heat. If it is replaced with cotton, the material is not easy to bond and the seams are prone to cracking.

[0005] 2. Traditional interiors are covered with synthetic fiber cloth at both ends, which prevents leaks but makes them stuffy. Cotton surface layers cannot be bonded using conventional ultrasonic or hot-press methods, which makes it impossible to seal in absorbent particles. Summary of the Invention

[0006] The main technical problem solved by this invention is how to make all parts of the absorbent material that come into contact with the human body from cotton, while at the same time solving the sewing and bonding problems caused by cotton.

[0007] According to a first aspect, one embodiment provides a method for preparing an absorbent article, comprising:

[0008] S1: Prepare the outer waistband, inner waistband, surface layer, absorbent core, bottom film and three-dimensional protective wall. The skin-contact surface of the materials used are all cotton fibers, and the cotton fibers of the inner waistband skin-contact surface and the chemical fibers of the non-skin-contact surface are prepared by hydroentangling process.

[0009] S2: Waistline composite;

[0010] The inner waist circumference includes the front inner waist section and the back inner waist section;

[0011] Elastic silk is placed on the non-skin-contact side of the inner waistband to cover the waist, abdomen, and hips.

[0012] The inner and outer waistbands are combined to form the waistband material;

[0013] S4: Internal molding;

[0014] The elastic yarn in the crotch area is coated with adhesive and then laid on the absorbent core.

[0015] Intermittent adhesive is applied to both ends of the surface layer at the gaps in the elastic yarn channels to bond it to the absorbent core;

[0016] The three-dimensional protective enclosure is cut, folded, and laid flat on both sides of the surface layer, and then laminated with a bottom film to form the inner lining. The width of the inner lining is greater than the narrowest width of the main body of the waistband after die-cutting.

[0017] S5: Composite interior and waistline body;

[0018] The inner bottom film is bonded to the skin-contact surface of the waistband body;

[0019] The waistband body is ultrasonically sealed to the sides.

[0020] S6: Packaging.

[0021] In another embodiment, in S2, the front inner waist section and the back inner waist section are formed by cutting the inner waist circumference, the front inner waist section and the back inner waist section are intermittently combined on the outer waist circumference, and the length of the back inner waist section is greater than the length of the front inner waist section.

[0022] In another embodiment, the discontinuity distance between the posterior inner waist segment and the anterior inner waist segment is not less than 5 cm.

[0023] In another embodiment, in S2, the inner waistband is set to full width, and it also includes a non-elastic section connecting the front inner waistband and the back inner waistband, a non-elastic section with adhesive on the inner side of the outer waistband, and elastic yarns for the waist, abdomen and hips arranged on the non-skin-contact side of the inner waistband at the waist, abdomen and hip position, with adhesive sprayed at the waist, abdomen and hip elastic yarn position.

[0024] In another embodiment, in S3, the cutting edge of the die-cutting mold is an O-shaped arc that conforms to the shape of the leg circumference.

[0025] In another embodiment, the treatment of the three-dimensional enclosure in S4 includes:

[0026] Three-dimensional elastic yarn is applied to the non-skin-contact side of the three-dimensional protective barrier after being sizing.

[0027] The three-dimensional protective fence is cut in the middle and then folded on the left and right. The upper edge of the folded part is continuously glued to the surface layer, and the lower edge of the folded part is laminated with a bottom film.

[0028] In another embodiment, in step S5, the entire product is folded in the center and then ultrasonically pressed to seal the sides. The ultrasonic welding process is employed, with a frequency greater than 70%, a pressure greater than 0.3 kPa, and a pressing time of not less than 200 seconds.

[0029] In another embodiment, S6 includes:

[0030] Single-piece final cut;

[0031] Wrap and seal, then bag the finished product.

[0032] According to the second aspect, one embodiment provides an absorbent article prepared using the above-described preparation method, comprising:

[0033] Outer waist circumference;

[0034] The inner waist circumference includes a front inner waist section and a back inner waist section, wherein the length of the back inner waist section is greater than the length of the front inner waist section;

[0035] The surface layer is secured with intermittent adhesive at the elastic yarn channel in the crotch area to prevent leakage.

[0036] An absorbent core, which is wrapped around the surface layer, is used to absorb liquid;

[0037] A bottom membrane is disposed at the lower end of the absorbent core;

[0038] as well as

[0039] A three-dimensional protective enclosure is installed on both sides of the surface layer;

[0040] Among them, the narrowest width of the leg opening die-cut is smaller than the width of the inner packaging, and the skin-contact surface of the absorbent product is made of cotton fiber, while the non-skin-contact surface of the inner waistband is made of chemical fiber.

[0041] In another embodiment, the three-dimensional enclosure uses a spunlace cotton substrate.

[0042] According to the absorbent product and its preparation method in the above embodiments, the outer waistband and inner waistband are ultrasonically composited. The cotton fibers that touch the skin improve comfort, while the non-skin-touching side of the inner waistband uses chemical fibers. The cotton layer is not damaged by heat, and the stitching is firm. The chemical fiber covering fabric is removed at both ends of the surface layer, directly exposing the two ends of the cotton surface layer to enhance breathability. Intermittent glue is applied through the gaps in the elastic yarn channel of the crotch area to perform "precise glue application" to prevent leakage. The glue dots block the side leakage channels of the absorbent particles, while maintaining the breathability of the cotton fabric. The inner waistband is cut first and then assembled. The width of the inner lining is greater than the narrowest width of the main body of the waistband after die-cutting, so that the edges are completely covered by the cotton surface layer. This ensures that the contact area between the absorbent product and the human body is made of pure cotton material, while solving the stitching and composite problems caused by pure cotton material. Attached Figure Description

[0043] Figure 1This is a schematic diagram of the overall structure of the absorbent article in one embodiment;

[0044] Figure 2 This is a cross-sectional view of the inner waistline along AA in one embodiment;

[0045] Figure 3 This is a schematic diagram of the inner waist circumference and outer waist circumference before they are combined in one embodiment;

[0046] Figure 4 This is a schematic diagram of the inner waist circumference and outer waist circumference combined in one embodiment;

[0047] Figure 5 This is a schematic diagram of the inner waistband body after die-cutting in one embodiment;

[0048] Figure 6 This is a schematic diagram of the composite state of the surface layer and the three-dimensional enclosure in one embodiment;

[0049] Figure 7 This is a schematic diagram of the internal structure in one embodiment;

[0050] Figure 8 This is a process flow diagram of the preparation method of the absorbent article in one embodiment.

[0051] Figure label:

[0052] 1. Surface layer; 2. Front inner waist section; 3. Back inner waist section; 4. Outer waistband; 5. Three-dimensional protective layer; 6. Three-dimensional elastic yarn; 7. Crotch elastic yarn; 8. Absorbent core. Detailed Implementation

[0053] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0054] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0055] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0056] Commonly used wearable absorbent products generally include overnight pants, disposable underwear, baby pull-ups, and adult pull-ups. These products come into direct contact with the human body and directly affect the wearer's comfort and skin health. With increasing consumer demand, pull-ups for babies and the elderly, as well as women's overnight pants, are being worn for longer periods, even during the day. The existing problem is that these products are thick, stuffy, and not breathable, resulting in extremely poor comfort during extended wear, especially in hot summers when they can cause excessive sweating and easily lead to allergies and other problems.

[0057] Current absorbent fabrics generally include an outer waistband 4, an inner waistband, a surface layer 1, an absorbent core 8 set within the surface layer 1, and a three-dimensional protective barrier 5. The absorbent core 8, surface layer 1, three-dimensional protective barrier 5, bottom film, and other accessories are pre-prepared as an inner layer and then laminated with the inner and outer waistbands. Currently, most pants on the market are made entirely of synthetic fibers in contact with the skin. A few products use pure cotton for the surface layer 1 in the core absorbent area. Cotton is less likely to cause allergies and is soft and comfortable against the skin. However, changing the material for other parts from synthetic fibers to cotton currently presents the following problems:

[0058] 1. The inner waistband of a traditional waistband is made of synthetic fiber and sewn with hot melt adhesive. If it is replaced with cotton, the material is not easy to bond and the seams are prone to cracking.

[0059] 2. Traditional surface layer 1 is covered with synthetic fiber cloth at both ends, which prevents leakage but is stuffy, while cotton surface layer 1 cannot seal in water-absorbing particles.

[0060] This application provides an absorbent article and its preparation method, which achieves that all contact areas between the absorbent article and the human body are made of pure cotton material, while simultaneously solving the sewing and composite problems caused by pure cotton material.

[0061] Example 1:

[0062] On one hand, one embodiment discloses a method for preparing an absorbent article; please refer to [reference needed]. Figures 1-8 This includes the following steps:

[0063] S1: Substrate preparation;

[0064] Waist circumference 4;

[0065] Inner waistband; for example, the inner waistband can be made of a substrate with a width ≥ 200 mm, or it can be made of other substrates with conventional widths in the art; its skin-contact side is made of cotton fiber with a cotton content of not less than 20 wt%, and the non-skin-contact side, i.e. the adhesive side, is made of chemical fiber, which is prepared by hydroentangling process and rolled into rolls for later use;

[0066] In this embodiment, the skin-contacting side of the inner waistband is made of cotton fiber to improve wearing comfort, while the non-skin-contacting side is made of chemical fiber to ensure the waistband's sealing strength, thus solving the defects of cotton being difficult to bond and the seams being prone to cracking.

[0067] Surface layer 1 is made of 100% cotton non-woven fabric, or it can be made of A / B base material with different fibers on both sides, similar to the inner waistband, as long as the skin-contact side of surface layer 1 is cotton, with a weight of ≥28gsm.

[0068] The absorbent core 8 is made by mixing polymer particles with fluff pulp. In other embodiments, other absorbent core configurations commonly used in the art may also be used.

[0069] The bottom membrane, made of breathable PE membrane, is set at the lower end of the absorbent core 8 to support the absorbent core 8 and prevent water leakage.

[0070] The three-dimensional protective barrier 5 is made of 100% cotton non-woven fabric. Alternatively, it can be made of A / B substrate with different fibers on both sides, similar to the inner waistband, to ensure that the skin-contact side of the surface layer 1 is made of cotton. Its weight range is ≥28gsm. In other embodiments, depending on the usage environment of the absorbent product, other weight substrates can also be used.

[0071] The elastic yarn is made of polyurethane elastic yarn, which is the same as commonly used rubber bands;

[0072] And other adhesives and other materials;

[0073] In other embodiments, the choice of substrate can be freely selected and changed according to the product's usage environment, user, and preparation conditions. However, in this embodiment, the skin-contact surface of each component of the absorbent product is made of cotton.

[0074] S2: Waistline composite;

[0075] S21: Inner waist circumference section;

[0076] Please refer to Figure 2 and Figure 3The inner waistband substrate is cut longitudinally along AA into a front inner waist section 2 and a back inner waist section 3, with the back inner waist section 3 being longer than the front inner waist section 2, in order to overcome the situation in traditional processes where the front and back waists are of equal length and the hips are not adequately covered and prone to leakage.

[0077] The front waistband is used to cover the abdomen and can be 150mm long; the back waistband is used to cover the S-shaped elastic silk area of ​​the buttocks and can be 220mm long, extending 10mm beyond the elastic area.

[0078] In this embodiment, the front inner waist section 2 and the back inner waist section 3 are formed by cutting the inner waistband to both sides. The front inner waist section 2 and the back inner waist section 3 are intermittently bonded to the outer waistband 4, and the interruption distance X between the back inner waist section 3 and the front inner waist section 2 is not less than 5cm. S22: Elastic silk bonding;

[0079] After applying adhesive to the elastic yarn around the waist, abdomen, and hips, it is placed on the non-skin-contact side of the inner waistband. Specifically, hot melt adhesive can be sprayed on, avoiding the cotton layer to prevent hardening.

[0080] S23: Composite inner waistband and outer waistband 4, forming waistband material;

[0081] Please refer to Figure 4 Lay the outer waist circumference 4 flat, with the non-skin-contact side of the inner waist circumference facing down and the skin-contact side facing up. Adhere the rear inner waist section 3 and the front inner waist section 2 to the outer waist circumference 4. At the same time, perform ultrasonic roll welding for side sealing. Specific optional parameters: frequency 75%, pressure 0.35kPa, time 220s, welding head temperature 160℃.

[0082] In this embodiment, the outer waistband 4 and the inner waistband are ultrasonically bonded without glue, the cotton layer is not damaged by heat, and the stitching is firm.

[0083] S3: Die-cut the waistband material to cut out the leg openings, forming the main body of the waistband;

[0084] Please refer to Figure 5 The waistband material is folded in half and fed into an O-shaped die-cutting machine to cut out an arc-shaped leg opening. The cutting edge of the die-cutting mold is an O-shaped arc that fits the shape of the leg opening. The curvature of the cutting edge matches the curve of the human leg opening, for example, the radius of curvature R = 80-100mm.

[0085] After die-cutting, the narrowest part of the waistband is smaller than the width of the inner garment. The inner waistband is cut first and then assembled. The pre-cutting technique ensures that the inner garment covers both the outer waistband and the inner waistband, guaranteeing that all contact areas between the absorbent material and the human body are made of pure cotton with no exposed synthetic fibers, thus improving comfort.

[0086] S4: Internal molding;

[0087] S41: Please refer to Figure 6 and Figure 7 Surface layer 1 - Absorbent core 8 composite;

[0088] The elastic yarn 7 in the crotch area is applied with adhesive and then laid on the absorbent core 8;

[0089] The surface layer 1 wraps around the absorbent core 8, specifically using a C-shaped coating.

[0090] Intermittent adhesive is applied to both ends of the surface layer 1 at the gaps in the channels of the elastic filaments 7 in the crotch area to bond it to the absorbent core 8, further reinforcing the surface layer 1 and the absorbent core 8.

[0091] In this embodiment, on the one hand, the chemical fiber covering fabric is removed at both ends of the surface layer 1, directly exposing both ends of the cotton surface layer 1 to enhance breathability; on the other hand, intermittent glue is applied through the gaps in the channels of the elastic yarn 7 in the crotch area to perform "precise glue application" to prevent leakage. The glue dots block the side leakage channels of the absorbent particles, thus preventing the leakage of absorbent particles while maintaining the breathability of the cotton fabric.

[0092] S42: Please refer to Figure 6 and Figure 7 Treatment of three-dimensional protective enclosure 5;

[0093] After being coated with adhesive, the 3D elastic yarn 6 is applied to the non-skin-contact side of the 3D protective barrier 5;

[0094] The three-dimensional protective enclosure 5 is cut in the middle and then folded on the left and right. The upper edge of the folded area is continuously glued and fixed to the surface layer 1, and the lower edge of the folded area is composite with a bottom film.

[0095] S43: The composite bottom film at the 5-fold of the three-dimensional guardrail and the absorbent core are integrated to form the inner lining. The bottom film is made of PE film. The three-dimensional guardrail is folded down and combined with the bottom film to form the inner lining. The final inner lining width is 110-230mm to accommodate different sizes.

[0096] S5: Composite interior and waistline body;

[0097] The inner bottom film is bonded to the skin-contact surface of the waistband body; the reverse side of the inner film, i.e., the bottom film, is sprayed with adhesive and bonded to the center of the waistband body, covering the narrower middle part of the inner waistband after die-cutting, and after pressing, the product is basically formed.

[0098] The waistband body is ultrasonically sealed; the entire product is folded in half in the center and then ultrasonically pressed and sealed. The ultrasonic process uses a roll welding process with a frequency greater than 70%, a pressure greater than 0.3KPa, and a pressing time of no less than 200S.

[0099] S6: Packaging;

[0100] Single-piece final cut: The sealed product is then cut into individual pieces for final cut.

[0101] The final-cut individual products are sent to the wrapping machine for sealing and then packed into packaging bags to complete the product preparation.

[0102] In this embodiment, the preparation process first adopts a pre-cutting technique, that is, first cut and then attach the inner packaging, so as to ensure that after the waist body and the inner packaging are attached, the outer waist 4 will not come into contact with the skin.

[0103] Secondly, the three-dimensional protective barrier 5 is generally used for leak-proof edge protection. In this embodiment, it is made using a hydroentangling process, which reduces fuzzing during friction and improves user comfort. Furthermore, the two ends of the surface layer 1 are fixed with intermittent dot adhesive, unlike the existing technology that uses non-woven fabric for fixing. This embodiment ensures breathability and skin-friendliness while preventing the leakage of absorbent particles; simultaneously, the waistband body is ultrasonically sealed to ensure the stitching strength of the cotton.

[0104] Example 2:

[0105] The difference between this embodiment and Embodiment 1 is that:

[0106] In S21, the inner waist is full width, including the front inner waist section (2), the back inner waist section (3) and the non-elastic section. The non-elastic section is the narrower central part after the waist body is die-cut.

[0107] In S22, the elastic yarn for the waist, abdomen, and hips is sprayed onto the non-skin-contact side of the inner waistband at the waist, abdomen, and hip position.

[0108] In S23, the outer waist circumference 4 is covered with adhesive in the area corresponding to the non-elastic section of the inner waist circumference, with the adhesive side facing up, the non-skin-contact side of the inner waist circumference facing down, and the skin-contact side facing up, so that the back inner waist section 3, the front inner waist section 2, and the non-elastic section are bonded together on the outer waist circumference 4.

[0109] The interrupted inner waistline, compared to the full-width inner waistline, reduces the amount of substrate used, further lowering costs.

[0110] On the other hand, one embodiment provides an absorbent article prepared using the above-described preparation method; please refer to [reference needed]. Figure 1 The system includes: an outer waist circumference 4 for providing basic support; an inner waist circumference including a front inner waist section 2 and a rear inner waist section 3, wherein the length of the rear inner waist 3 is greater than the length of the front inner waist 2, and the inner waist circumference is fixed to the outer waist circumference 4 to form the waist circumference body; a surface layer 1 having several arrayed drainage holes for liquid drainage; an absorbent core 8 encased in the surface layer 1 and used for absorbing liquid; a bottom membrane disposed below the absorbent core 8; and a three-dimensional protective enclosure 5 disposed on both sides of the surface layer 1 and fixed together with the bottom membrane, so that the surface layer 1, absorbent core 8, three-dimensional protective enclosure 5 and bottom membrane form a complete inner package, and the inner package is bonded and fixed above the waist circumference body.

[0111] Specifically, the inner waistband, outer layer 1, and three-dimensional protective layer 5 are made of cotton material on at least the skin-contact side, so that the skin-contact surface of the absorbent product is made of cotton, thereby improving the comfort of use.

[0112] In this embodiment, please refer to Figure 6 and Figure 7 The three-dimensional protective layer 5 and the outer layer 1 can be made of pure cotton or cotton on one side, that is, the side of the three-dimensional protective layer 5 that is close to the skin is made of cotton; while the skin-contact side of the inner waistband is made of cotton fiber, and the non-skin-contact side of the inner waistband is made of chemical fiber. The two are made into a base material through a hydroentangling process, which ensures wearing comfort while solving the defects of cotton being difficult to bond and easy to crack at the seams.

[0113] Furthermore, in other embodiments, the three-dimensional protective enclosure 5 can be a flat structure or a standing structure. It can also be a structure with elastic bands as in this embodiment or a structure without elastic bands. The specific choice needs to be made according to the user group and usage environment of the absorbent product.

[0114] In this embodiment, please refer to Figure 1 After the waistband body is cut out of the leg openings by an O-shaped die, the narrowest width of the waistband body after die cutting is less than the width of the inner garment, so that the cotton surface layer 1 and the three-dimensional protective cover 5 can completely cover the material below and prevent the chemical fibers from leaking out.

[0115] For further details, please refer to... Figure 1 The front inner waist section 2 and the back inner waist section 3 can be full width or split in the middle to the sides. In this embodiment, the front inner waist section 2 and the back inner waist section 3 are intermittently combined on the outer waist circumference 4, and the distance between the back inner waist section 3 and the front inner waist section 2 is X, and X is not less than 5cm. The absorbent product of this embodiment adopts a pre-cutting technology, which can ensure that the waist circumference width of the absorbent product is narrower than the inner width within a 5cm area above and below the center point of the product, thereby avoiding the leakage of chemical fibers.

[0116] Furthermore, the surface layer 1 is leak-proof by intermittent bonding at the crotch elastic yarn 7 channel. On the one hand, the chemical fiber covering fabric at both ends of the surface layer 1 is removed, directly exposing the cotton surface layer 1 at both ends, thus enhancing breathability. On the other hand, intermittent adhesive is applied at the gaps in the crotch elastic yarn 7 channel to perform "precise adhesive application" to prevent leakage. The adhesive dots block the side leakage channels of absorbent particles, thus preventing the absorption of particles from leaking while maintaining the breathability of the cotton fabric.

[0117] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A method for preparing an absorbent product, characterized in that, Includes the following steps: S1: Prepare the outer waistband (4), inner waistband, surface layer (1), absorbent core (8), bottom film and three-dimensional protective wall (5). The skin-contact surface of the materials used is made of cotton fiber, and the cotton fiber of the inner waistband skin-contact surface and the chemical fiber of the non-skin-contact surface are prepared by hydroentangling process. S2: Waistline composite; The inner waist circumference includes the front inner waist section (2) and the back inner waist section (3); Elastic silk is placed on the non-skin-contact side of the inner waistband to cover the waist, abdomen, and hips. The inner and outer waistbands (4) are combined to form a waistband material; S3: Die-cut waist and leg shape; Die-cut the waistband material to cut out the leg openings, forming the main body of the waistband; S4: Internal molding; The elastic yarn (7) in the crotch area is applied with adhesive and then laid on the absorbent core (8); The surface layer (1) is bonded to the absorbent core (8) at both ends of the elastic filament (7) at the crotch with intermittent adhesive; The three-dimensional protective enclosure (5) is cut and folded and laid flat on both sides of the surface layer (1), and the composite bottom film is used to form the inner packaging. The width of the inner packaging is greater than the narrowest width of the waist body after die-cutting. S5: Composite interior and waistline body; The inner bottom film is bonded to the skin-contact surface of the waistband body; The waistband body is ultrasonically sealed to the sides. S6: Packaging.

2. The method for preparing the absorbent article as described in claim 1, characterized in that, In the S2, the front inner waist section (2) and the back inner waist section (3) are formed by cutting the inner waist circumference. The front inner waist section (2) and the back inner waist section (3) are intermittently combined on the outer waist circumference (4), and the length of the back inner waist section (3) is greater than the length of the front inner waist section (2).

3. The method for preparing the absorbent product as described in claim 2, characterized in that, The discontinuity between the posterior inner lumbar segment (3) and the anterior inner lumbar segment (2) shall not be less than 5 cm.

4. The method for preparing the absorbent article as described in claim 1, characterized in that, In the S2, the inner waistband is set to full width, and it also includes a non-elastic section connecting the front inner waistband (2) and the back inner waistband (3). The non-elastic section on the inner side of the outer waistband (4) is covered with adhesive. The waist, abdomen and hip elastic threads are arranged on the waist, abdomen and hip position of the non-skin-contact side of the inner waistband, and the waist, abdomen and hip elastic threads are sprayed with adhesive.

5. The method for preparing the absorbent article according to any one of claims 1-4, characterized in that, In S3, the cutting edge of the die-cutting mold is an O-shaped arc that conforms to the shape of the leg circumference.

6. The method for preparing the absorbent article as described in claim 1, characterized in that, In S4, the treatment of the three-dimensional enclosure (5) includes: After being sizing, the three-dimensional elastic yarn (6) is laid on the non-skin-contact side of the three-dimensional protective fence (5); The three-dimensional protective enclosure (5) is cut in the middle and then folded on the left and right. The upper edge of the fold is continuously glued and fixed to the surface layer (1). The lower edge of the fold is composite with the bottom film.

7. The method for preparing the absorbent article as described in claim 1, characterized in that, In step S5, the entire product is folded in the center and then ultrasonically pressed to seal the sides. The ultrasonic process uses a roll welding process with a frequency greater than 70%, a pressure greater than 0.3 kPa, and a pressing time of not less than 200 seconds.

8. The method for preparing the absorbent article as described in claim 1, characterized in that, S6 includes: Single-piece final cut; Wrap and seal, then bag the finished product.

9. An absorbent article, prepared by the preparation method according to any one of claims 1-8, characterized in that, include: Waist circumference (4); The inner waist includes a front inner waist section (2) and a back inner waist section (3), wherein the length of the back inner waist (3) is greater than the length of the front inner waist (2); The surface layer (1) is fixed to prevent leakage by intermittent adhesive at the channel of the elastic filament (7) in the crotch area; An absorbent core (8) is wrapped around the surface layer (1) and used to absorb liquid; A bottom membrane is disposed at the lower end of the absorbent core (8); as well as Three-dimensional protective enclosure (5) is provided on both sides of the surface layer (1); Among them, the narrowest width of the leg opening die-cut is smaller than the width of the inner packaging, and the skin-contact surface of the absorbent product is made of cotton fiber, while the non-skin-contact surface of the inner waistband is made of chemical fiber.

10. The absorbent article as claimed in claim 9, characterized in that, The three-dimensional protective enclosure (5) is made of spunlace cotton substrate.

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