A pair of openable sleep pants and a method of making

Abstract

This invention discloses a closable sleeping pant and its manufacturing method, comprising an elastic front waistband, an elastic back waistband, a bottom film, a first absorbent core, a second absorbent core, and a skin-friendly surface layer. The bottom film is fixedly connected between the elastic front waistband and the elastic back waistband. Adhesive portions are fixed on both sides of the elastic back waistband. The front of the elastic front waistband has a mating adhesive portion for adhering the adhesive portions. The first absorbent core is fixed on the bottom film and has at least two elongated holes along its length. The second absorbent core is fixed on the first absorbent core and has a seepage hole in the middle rear part, with the two sides of the seepage hole coinciding with the two elongated holes. The skin-friendly surface layer is fixed on the second absorbent core. This sleeping pant can be opened and closed, making it more convenient to put on and take off.

Description

Technical Field

[0001] This invention relates to the field of hygiene products technology, and in particular to a fold-down sleeping pant and its preparation method. Background Technology

[0002] Sleep pants are disposable underwear-style sanitary napkins that offer the advantages of worry-free heavy flow and breathability, making them suitable for preventing leaks during menstruation and postpartum.

[0003] Common overnight pants consist of a skin-friendly outer layer, absorbent core, leak-proof elastic side panels, waistband, and bottom film. They are shaped like underwear and are torn open from the side after use, detaching from the user's waist. Although the side is easy to tear, to ensure a secure fit, the user must use both hands simultaneously to forcefully tear from the edges. Because the waistband is elastic, the torn edge may hit the user's skin during the tearing process. Furthermore, when the overnight pants are completely removed, it is difficult to withdraw both hands in time, potentially causing menstrual blood from the pants to come into contact with the skin on the inner thighs. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an openable sleeping pant and a manufacturing method thereof, so as to solve the problem that existing sleeping pants are inconvenient to tear off.

[0005] The objective of this invention is achieved through the following technical solution: A type of folding over-the-knee sleeping pants includes an elastic front waistband, an elastic back waistband, a bottom membrane, a first absorbent core, a second absorbent core, and a skin-friendly surface layer. The bottom membrane is fixedly connected between the elastic front waistband and the elastic back waistband. Adhesive portions are fixed to both sides of the elastic back waistband. The front of the elastic front waistband has a mating adhesive portion for adhering the adhesive portions. The first absorbent core is fixed to the bottom membrane and has at least two elongated holes along its length. The second absorbent core is fixed to the first absorbent core and has a leakage hole in its rear center, with the two sides of the leakage hole coinciding with the two elongated holes. The skin-friendly surface layer is fixed to the second absorbent core.

[0006] Preferably, the length of the seepage hole is 1 / (2-3) of the length of the second absorbent core, the width of the seepage hole is (2-3) / 4 of the width of the second absorbent core, and the distance between the seepage hole and the tail end of the second absorbent core is 1 / (4-5) of the length of the second absorbent core.

[0007] Preferably, the first absorbent core comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp.

[0008] Preferably, the preparation method of the first absorbent core includes the following steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric on the bottom surface of the first shaping mold, evenly spreading the SAP resin particles on the breathable fabric, evenly spreading the fluffed pulp on the SAP resin particles, evacuating the inner cavity of the first shaping mold, and then pressing the fluff pulp and SAP resin particles down using the first pressure plate to obtain the first absorbent core.

[0009] Preferably, the first shaping mold includes a first mold body, on which a first material receiving groove is provided, and at the bottom of the first material receiving groove are a plurality of first vent holes. A vertical partition is fixed at the bottom of the first material receiving groove along the length direction of the first absorbent core. The vertical partition protrudes from the bottom surface of the first material receiving groove. Inside the first mold body, a first air extraction groove communicating with the first vent holes is provided. An air extraction device is connected to the outside of the first air extraction groove. The first pressure plate is located directly above the first material receiving groove and can move up and down directly above the first material receiving groove. The bottom surface of the first pressure plate has an insertion hole for the vertical partition to extend into. The first pressure plate is driven by a first lifting mechanism. The first shaping mold also includes a first movable plate that can move up and down. The first movable plate is disposed in the first air extraction groove and is driven by the second lifting mechanism. The first movable plate is provided with a plurality of first blocking columns. The first blocking columns are directly opposite the first vent hole. When the first movable plate moves upward, the first blocking columns can block the first vent hole.

[0010] Preferably, the second absorbent core comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp.

[0011] Preferably, the preparation method of the second absorbent core includes the following steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric on the bottom surface of the second shaping mold, evenly spreading the SAP resin particles on the breathable fabric, then evenly spreading the fluffed pulp on the SAP resin particles, evacuating the inner cavity of the second shaping mold, and then pressing the fluff pulp and SAP resin particles down using the second pressure plate to obtain the second absorbent core.

[0012] Preferably, the second shaping mold includes a second mold body, a second material receiving groove is provided on the bottom surface of the second mold body, a protruding partition is provided at the bottom of the second material receiving groove, a plurality of second vent holes are provided at the bottom of the second material receiving groove avoiding the partition, a second air extraction groove is provided inside the second mold body and communicates with the second vent holes, an air suction device is connected to the outside of the second air extraction groove, the second pressure plate is located directly above the second material receiving groove and can move up and down directly above the second material receiving groove, the second pressure plate is driven by a third lifting mechanism, and a mating groove for the partition to be inserted is provided at the bottom of the second pressure plate; The second shaping mold also includes a second movable plate that can move up and down. The second movable plate is located in the second air extraction groove and is driven by a fourth lifting mechanism. The second movable plate is provided with a plurality of second blocking pillars. The second blocking pillars are directly opposite the second vent hole. When the second movable plate moves upward, the second blocking pillars can block the second vent hole.

[0013] A method for preparing a pair of comfortable sleeping pants involves sequentially bonding the bottom film, the first absorbent core, the second absorbent core, and the skin-friendly surface layer, and then fixing the bottom film between the elastic front waistband and the elastic back waistband to obtain the comfortable sleeping pants.

[0014] The beneficial effects of this invention are: (1) Adhesive parts are fixed on both sides of the elastic back waistband, and a matching adhesive part is provided on the front of the elastic front waistband. The adhesive parts can be attached to the matching adhesive part, which can realize the opening and closing between the elastic back waistband and the elastic front waistband, making it more convenient to put on and take off the sleeping pants.

[0015] (2) The SAP resin is granulated and then combined with a molding die. The SAP resin particles are wrapped with fluff pulp. The fluff pulp is made of plant fiber, which has high strength and thick cell wall. This makes the fluff pulp hold the SAP resin like a net. On the one hand, when menstrual blood comes into contact with the core, it can quickly diffuse to the surrounding and bottom SAP resin along the fiber network of the fluff pulp, avoiding local saturation. At the same time, it promotes the rapid absorption of SAP resin and locks in the menstrual blood. On the other hand, it forms a barrier between SAP resins, effectively preventing SAP from swelling and sticking together after absorbing water, preventing gel blockage, ensuring that menstrual blood can continuously penetrate, improving the softness and breathability of the core, and increasing the absorption speed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the opening and closing sleeping pants of the present invention; Figure 2 This is a structural development diagram of the folding and unfolding sleeping pants of the present invention; Figure 3This is a schematic diagram of the structure in which the first absorbent core and the second absorbent core are bonded together in this invention; Figure 4 This is a schematic diagram of the structure in this invention where the first absorber core and the second absorber core are separated; Figure 5 This is a schematic diagram of the structure of the first shaping mold in this invention; Figure 6 This is a schematic diagram of the structure of the second shaping mold in this invention; Figure 7 This is a schematic diagram of the structure of the first shaping mold with pressing parts in this invention; In the diagram: 1. Elastic front waistband; 2. Elastic back waistband; 3. Bottom film; 4. First absorbent core; 5. Second absorbent core; 6. Skin-friendly surface layer; 7. Adhesive part; 8. Adhesive part; 9. Long strip hole; 10. Leakage hole; 11. First shaping mold; 111. First mold body; 112. First material container; 113. First vent hole; 114. Vertical partition; 115. First air extraction groove; 116. First moving plate; 117. First blocking column; 118. Second lifting plate. 12. Lowering mechanism; 13. First pressure plate; 14. Insertion hole; 15. First lifting mechanism; 16. Second shaping mold; 17. Second material receiving tank; 18. Partition; 19. Second vent hole; 20. Second suction groove; 11. Second moving plate; 21. Fourth lifting mechanism; 12. Second pressure plate; 13. Third lifting mechanism; 14. Matching groove; 15. Telescopic cylinder; 26. Lowering partition plate. Detailed Implementation

[0017] To make the technical problems solved by the invention, the technical solutions and the beneficial effects clearer, the invention will be further described below in conjunction with the accompanying drawings and embodiments. Example 1

[0018] like Figure 1-6 As shown, this embodiment provides a foldable sleeping pant, including an elastic front waistband 1, an elastic back waistband 2, a bottom film 3, a first absorbent core 4, a second absorbent core 5, and a skin-friendly surface layer 6. The bottom film 3 is fixedly connected between the elastic front waistband 1 and the elastic back waistband 2. Adhesive portions 7 are fixed on both sides of the elastic back waistband 2. The front of the elastic front waistband 1 is provided with a mating adhesive portion 8 for adhering the adhesive portions 7. The first absorbent core 4 is fixed on the bottom film 3. The first absorbent core 4 has at least two elongated holes 9 along its length. The second absorbent core 5 is fixed on the first absorbent core 4. A seepage hole 10 is provided in the rear middle of the second absorbent core 5. The two sides of the seepage hole 10 coincide with the two elongated holes 9. The skin-friendly surface layer 6 is fixed on the second absorbent core 5.

[0019] Adhesive-back sections 7 are fixed to both sides of the elastic back waistband 2, and a matching adhesive section 8 is provided on the front of the elastic front waistband 1. The adhesive-back sections 7 can be attached to the matching adhesive sections 8, enabling the opening and closing of the elastic back waistband 2 and the elastic front waistband 1, making it easier to put on and take off the over-the-knee pants. The adhesive-back sections 7 can be attached to the matching adhesive sections 8 using Velcro or similar fasteners. Leak-proof elastic side panels are also provided on both sides of the bottom membrane 3, which can be achieved using existing technology and will not be described in detail here.

[0020] The number of elongated holes 9 is preferably even, such as two or four. The number of elongated holes 9 can be determined according to the width of the first absorbent core 4. For example, two elongated holes 9 can be provided for the front middle part, while four can be provided for the wider rear part. The elongated holes 9 do not penetrate the entire first absorbent core 4, which facilitates processing and avoids leakage.

[0021] The elongated perforation 9 is designed along the length of the first absorbent core 4. This is because when a user wears the sleeping pants, the distance between their legs is inevitably greater than the original width of the first absorbent core 4. The sleeping pants are compressed in the width direction during use. The elongated perforation 9 allows the first absorbent core 4 to wrinkle along the position of the perforation 9 during compression. This creates a concave, arc-shaped bend in the first absorbent core 4, guided by the elongated perforation 9, which helps to hold more menstrual blood and prevents side leakage or backflow. At the same time, the elongated perforation 9 provides better breathability for the first absorbent core 4.

[0022] The second absorbent core 5 has seepage holes 10 at the location of heavy menstrual bleeding. This helps the arc-shaped concave structure of the first absorbent core 4 absorb more menstrual blood. Simultaneously, the seepage holes 10 overlap with two elongated holes 9 on both sides, facilitating the alignment and adhesion of the first and second absorbent cores 4 and 5. The second absorbent core 5 is higher than the first absorbent core 4, thus providing greater thickness to the sides of the sleeping pants. This increases absorbency and prevents side leakage.

[0023] refer to Figure 4 The length H1 of the leakage hole 10 is 1 / (2-3) of the length of the second absorbent core 5, the width H2 of the leakage hole 10 is (2-3) / 4 of the width of the second absorbent core 5, and the distance H3 between the leakage hole 10 and the tail end of the second absorbent core 5 is 1 / (4-5) of the length of the second absorbent core 5. Through the above arrangement, the leakage hole 10 is positioned in the area with the largest menstrual flow, enabling rapid penetration and absorption of menstrual blood and preventing side leakage.

[0024] Preferably, the first absorbent core 4 comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp. The second absorbent core 5 comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp. For the same pair of over-the-lamp pants, the raw material proportions of the first absorbent core 4 and the second absorbent core 5 are the same.

[0025] As a preferred embodiment, the preparation method of the first absorbent core 4 includes the following steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric on the bottom surface of the first shaping mold 11, evenly spreading the SAP resin particles on the breathable fabric, evenly spreading the fluffed pulp on the SAP resin particles, evacuating the air from the inner cavity of the first shaping mold 11, and then pressing down the fluff pulp and SAP resin particles using the first pressure plate 12 to obtain the first absorbent core 4.

[0026] The preparation method of the second absorbent core 5 includes the following steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric on the bottom surface of the second shaping mold 15, evenly spreading the SAP resin particles on the breathable fabric, evenly spreading the fluffed pulp on the SAP resin particles, evacuating the air from the inner cavity of the second shaping mold 15, and then pressing down the fluff pulp and SAP resin particles using the second pressure plate 16 to obtain the second absorbent core 5.

[0027] The preparation methods of the first absorbent core 4 and the second absorbent core 5 are roughly the same, but the structures of the first shaping mold 11 and the second shaping mold 15 are different, and they are used to obtain the first absorbent core 4 and the second absorbent core 5 with different shapes.

[0028] SAP resin is granulated and then combined with a molding die. The SAP resin granules are then encapsulated with fluff pulp, which is made from plant fibers. It has high strength and thick cell walls, which allows the fluff pulp to hold the SAP resin like a net. On the one hand, when menstrual blood comes into contact with the core, it can quickly diffuse to the surrounding and bottom SAP resin along the fiber network of the fluff pulp, avoiding local saturation. At the same time, it promotes the rapid absorption of SAP resin and locks in the menstrual blood. On the other hand, it forms a barrier between the SAP resin particles, effectively preventing the SAP from swelling and sticking together after absorbing water, preventing gel blockage, ensuring continuous penetration of menstrual blood, improving the softness and breathability of the core, and increasing the absorption speed.

[0029] refer to Figure 5The first molding die 11 includes a first die body 111, a first material receiving groove 112 is provided on the first die body 111, a plurality of first vent holes 113 are provided at the bottom of the first material receiving groove 112, a vertical partition 114 is fixed at the bottom of the first material receiving groove 112 along the length direction of the first absorbent core 4, the vertical partition 114 blocks the first vent holes 113 below it, the position of the vertical partition 114 is the position of the elongated hole 9 on the first absorbent core 4, the vertical partition 114 protrudes from the bottom surface of the first material receiving groove 112, a first air extraction groove 115 is provided inside the first die body 111 and communicates with the first vent holes 113, an air extraction device is connected to the outside of the first air extraction groove 115, a first pressure plate 12 is provided directly above the first material receiving groove 112 and can move up and down directly above the first material receiving groove 112, an insertion hole 13 for the vertical partition 114 to extend into is provided on the bottom surface of the first pressure plate 12, and the first pressure plate 12 is driven by a first lifting mechanism 14.

[0030] The first shaping mold 11 also includes a first movable plate 116 that can move up and down. The first movable plate 116 is located in the first air extraction groove 115 and is driven by the second lifting mechanism 118. The first movable plate 116 is provided with a plurality of first blocking columns 117. The first blocking columns 117 are directly opposite the first vent hole 113. When the first movable plate 116 moves upward, the first blocking columns 117 can block the first vent hole 113.

[0031] refer to Figure 6 The second shaping mold 15 includes a second mold body 151. A second material receiving groove 152 is provided on the bottom surface of the second mold body 151. A protruding baffle 153 is provided at the bottom of the second material receiving groove 152. A seepage hole 10 is formed at the position of the baffle 153. A plurality of second vent holes 155 are provided at the bottom of the second material receiving groove 152, avoiding the position of the baffle 153. A second suction groove 156 communicating with the second vent holes 155 is provided inside the second mold body 151. An air suction device is connected to the outside of the second suction groove 156. A second pressure plate 16 is located directly above the second material receiving groove 152 and can move up and down directly above the second material receiving groove 152. The second pressure plate 16 is driven by a third lifting mechanism 17. A mating groove 18 for the baffle 153 to be inserted is provided at the bottom of the second pressure plate 16.

[0032] The second shaping mold 15 also includes a second movable plate 157 that can move up and down. The second movable plate 157 is located in the second air extraction groove 156 and is driven by the fourth lifting mechanism 158. The second movable plate 157 is provided with a plurality of second blocking columns 154. The second blocking columns 154 are directly opposite the second vent hole 155. When the second movable plate 157 moves upward, the second blocking columns 154 can block the second vent hole 155.

[0033] refer to Figure 7As a preferred embodiment, pressing components can be installed in the first material container 112 and the second material container 152 to fix the edge position of the breathable fabric and prevent the breathable fabric from unfolding normally. The pressing components adopt a structure in which a telescopic cylinder 19 drives a lower pressing partition 20. The telescopic cylinder 19 is fixed on the first mold body 111 and extends downward. The telescopic end is fixed with a lower pressing partition 20. Pressing components are provided on both sides of the first material container 112 and the second material container 152. The first pressing plate 12 and the second pressing plate 16 move between the two lower pressing partitions 20. Example 2

[0034] This embodiment provides a pair of comfortable sleeping pants, the preparation method of which includes the following steps: cutting the first absorbent core 4 and the second absorbent core 5 into the required shapes; bonding the bottom film 3, the first absorbent core 4, the second absorbent core 5 and the skin-friendly surface layer 6 in sequence; and then fixing the bottom film 3 between the elastic front waistband 1 and the elastic back waistband 2 to obtain the comfortable sleeping pants.

[0035] The first absorbent core 4 comprises the following raw materials by weight: 75 parts SAP resin and 25 parts fluff pulp, and the second absorbent core 5 comprises the following raw materials by weight: 75 parts SAP resin and 25 parts fluff pulp.

[0036] The sleeping pants were placed on a mannequin, and the absorption was tested at the back two-thirds of the pants. The measured absorption was 47.85g. Example 3

[0037] This embodiment provides a pair of comfortable sleeping pants, the preparation method of which includes the following steps: bonding the bottom film 3, the first absorbent core 4, the second absorbent core 5 and the skin-friendly surface layer 6 in sequence, and then fixing the bottom film 3 between the elastic front waistband 1 and the elastic back waistband 2 to obtain the comfortable sleeping pants.

[0038] The first absorbent core 4 comprises the following raw materials by weight: 80 parts SAP resin and 20 parts fluff pulp, and the second absorbent core 5 comprises the following raw materials by weight: 80 parts SAP resin and 20 parts fluff pulp.

[0039] The sleeping pants were placed on a mannequin, and the absorption was tested at the back two-thirds of the pants. The measured absorption was 47.54g. Example 4

[0040] This embodiment provides a pair of comfortable sleeping pants, the preparation method of which includes the following steps: bonding the bottom film 3, the first absorbent core 4, the second absorbent core 5 and the skin-friendly surface layer 6 in sequence, and then fixing the bottom film 3 between the elastic front waistband 1 and the elastic back waistband 2 to obtain the comfortable sleeping pants.

[0041] The first absorbent core 4 comprises the following raw materials by weight: 70 parts SAP resin and 30 parts fluff pulp, and the second absorbent core 5 comprises the following raw materials by weight: 70 parts SAP resin and 30 parts fluff pulp.

[0042] The sleeping pants were placed on a mannequin, and the absorption was tested at the back two-thirds of the pants. The measured absorption was 47.26g.

[0043] The preparation method of the first absorbent core 4 in Examples 2-4 includes the following specific steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric in the first container 112, pressing the breathable fabric with a pressing component, opening holes in the breathable fabric at the positions of the two vertical partitions 114, evenly spreading the SAP resin particles on the breathable fabric, and then evenly spreading the fluffed pulp on the SAP resin particles, ensuring that the height of the vertical partitions 114 is much greater than the laying height of the SAP resin particles and fluff pulp; S4, lowering the first moving plate 116, and the air suction device begins to draw away the air in the first air suction groove 115. The first absorbent core 4 is obtained by vacuuming the first material tank 112. The breathable fabric is firmly adhered to the bottom wall of the first material tank 112, and the fluff pulp gradually penetrates between the SAP resin particles. After vacuuming for 5 seconds, the suction is removed. S5, the second lifting mechanism 118 drives the first moving plate 116 to move upward, the first blocking column 117 blocks the first vent 113, and the first lifting mechanism 14 drives the first pressure plate 12 to move downward. The first pressure plate 12 presses down on the fluff pulp and SAP resin particles, so that the fluff pulp wraps around the SAP resin particles. When the first pressure plate 12 presses down, the vertical spacer 114 extends into the insertion hole 13. There is no fluff pulp or SAP resin particles at the position of the vertical spacer 114, and the required elongated hole 9 is formed at the position of the vertical spacer 114, thus obtaining the first absorbent core 4. The first absorbent core 4 is divided into five equal parts along the width direction, and the two vertical spacers 114 are located at the symmetrical middle equal part positions.

[0044] The preparation method of the second absorbent core 5 in Examples 2-4 includes the following specific steps: S1, fluffing the fluff pulp and setting it aside; S2, granulating and screening the SAP resin to obtain SAP resin particles with a particle size of 200-300μm; S3, laying a breathable fabric in the second container 152, pressing the breathable fabric with a pressing component, opening holes in the breathable fabric at the position of the partition 153, evenly spreading the SAP resin particles on the breathable fabric, and then evenly spreading the fluffed pulp on the SAP resin particles, ensuring that the height of the partition 153 is much greater than the laying height of the SAP resin particles and fluff pulp; S4, lowering the second moving plate 157, and the suction device begins to draw away the gas in the second suction tank 156. The second material tank 152 is then de-aired, and the breathable fabric is firmly adhering to the bottom wall of the second material tank 152. The fluff pulp gradually penetrates between the SAP resin particles. After de-airing for 5 seconds, the suction is removed. S5, the fourth lifting mechanism 158 drives the second moving plate 157 to move upward, and the second blocking column 154 blocks the second vent 155. The third lifting mechanism 17 drives the second pressure plate 16 to move downward. The second pressure plate 16 presses down on the fluff pulp and SAP resin particles, so that the fluff pulp wraps around the SAP resin particles. When the second pressure plate 16 presses down, the partition 153 extends into the mating groove 18. There is no fluff pulp or SAP resin particles at the position of the partition 153. The required seepage hole 10 is formed at the position of the partition 153, and finally the second absorbent core 5 is obtained. The length H1 of the seepage hole 10 is 1 / 3 of the length of the second absorbent core 5, the width H2 of the seepage hole 10 is 1 / 2 of the width of the second absorbent core 5, and the distance H3 between the seepage hole 10 and the tail end of the second absorbent core 5 is 1 / 4 of the length of the second absorbent core 5.

[0045] Comparative Example 1 Compared with Example 2, the difference of Comparative Example 1 is that, in the preparation process of the absorbent core, the fluffed pulp and SAP resin particles with a particle size of 200-300μm are directly stirred and mixed, and then extruded into the first absorbent core 4 and the second absorbent core 5.

[0046] The sleeping pants were placed on a mannequin, and the absorption was tested at the back two-thirds of the pants. The measured absorption was 43.51g.

[0047] Comparative Example 2 Compared with Example 2, Comparative Example 2 differs in that, in the preparation process of the absorbent core, 100 parts of SAP resin were directly extruded to obtain the first absorbent core 4 and the second absorbent core 5.

[0048] The sleeping pants were placed on a mannequin, and the absorption was tested at the back two-thirds of the pants. The measured absorption was 42.58g.

[0049] In summary, by setting the first absorbent core 4 and the second absorbent core 5, the present invention increases the absorbency of the sleeping pants and effectively avoids side leakage.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims

1. A type of fold-down sleeping pants, characterized in that, The device includes an elastic front waistband (1), an elastic back waistband (2), a bottom film (3), a first absorbent core (4), a second absorbent core (5), and a skin-friendly surface layer (6). The bottom film (3) is fixedly connected between the elastic front waistband (1) and the elastic back waistband (2). Both sides of the elastic back waistband (2) are fixed with adhesive parts (7). The front of the elastic front waistband (1) is provided with a mating adhesive part (8) for the adhesive parts (7) to be bonded. The first absorbent core (4) is fixed on the bottom film (3). The first absorbent core (4) has at least two elongated holes (9) along its length. The second absorbent core (5) is fixed on the first absorbent core (4). The second absorbent core (5) has a seepage hole (10) in the middle rear part. The two sides of the seepage hole (10) coincide with the two elongated holes (9). The skin-friendly surface layer (6) is fixed on the second absorbent core (5).

2. The folding sleep pants according to claim 1, characterized in that, The length of the seepage hole (10) is 1 / (2-3) of the length of the second absorbent core (5), the width of the seepage hole (10) is (2-3) / 4 of the width of the second absorbent core (5), and the distance between the seepage hole (10) and the tail end of the second absorbent core (5) is 1 / (4-5) of the length of the second absorbent core (5).

3. The folding sleep pants according to claim 1, characterized in that, The first absorbent core (4) comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp.

4. The folding sleep pants according to claim 3, characterized in that, The preparation method of the first absorbent core (4) includes the following steps: S1, fluffing pulp is fluffed and set aside; S2, SAP resin is granulated and screened to obtain SAP resin particles with a particle size of 200-300μm; S3, breathable fabric is laid on the bottom surface of the first shaping mold (11), SAP resin particles are evenly laid on the breathable fabric, fluffed pulp is evenly spread on the SAP resin particles, the cavity of the first shaping mold (11) is de-aired, and then the fluff pulp and SAP resin particles are pressed down by the first pressure plate (12) to obtain the first absorbent core (4).

5. A type of lap-open sleeping pants according to claim 4, characterized in that, The first shaping mold (11) includes a first mold body (111), on which a first material receiving groove (112) is provided. A plurality of first ventilation holes (113) are provided at the bottom of the first material receiving groove (112). A vertical partition (114) is fixed at the bottom of the first material receiving groove (112) along the length of the first absorbent core (4). The vertical partition (114) protrudes from the bottom surface of the first material receiving groove (112). 1) The interior is provided with a first air extraction groove (115) communicating with the first air vent (113). The first air extraction groove (115) is connected to an air suction device. The first pressure plate (12) is located directly above the first material container (112) and can move up and down directly above the first material container (112). The bottom surface of the first pressure plate (12) is provided with an insertion hole (13) for the vertical partition (114) to extend into. The first pressure plate (12) is driven by the first lifting mechanism (14). The first shaping mold (11) also includes a first movable plate (116) that can move up and down. The first movable plate (116) is located in the first air extraction groove (115) and is driven by the second lifting mechanism (118). The first movable plate (116) is provided with a plurality of first blocking columns (117). The first blocking columns (117) are directly facing the first vent hole (113). When the first movable plate (116) moves upward, the first blocking columns (117) can block the first vent hole (113).

6. The folding sleep pants according to claim 1, characterized in that, The second absorbent core (5) comprises the following raw materials in parts by weight: 70-80 parts SAP resin and 20-30 parts fluff pulp.

7. A type of lapels with opening and closing mechanism according to claim 6, characterized in that, The preparation method of the second absorbent core (5) includes the following steps: S1, fluffing pulp is fluffed and set aside; S2, SAP resin is granulated and screened to obtain SAP resin particles with a particle size of 200-300μm; S3, breathable fabric is laid on the bottom surface of the second shaping mold (15), SAP resin particles are evenly laid on the breathable fabric, fluffed pulp is evenly spread on the SAP resin particles, the inner cavity of the second shaping mold (15) is de-aired, and then the fluff pulp and SAP resin particles are pressed down by the second pressure plate (16) to obtain the second absorbent core (5).

8. A type of lapels with opening and closing mechanism according to claim 7, characterized in that, The second shaping mold (15) includes a second mold body (151), a second material receiving groove (152) is provided on the bottom surface of the second mold body (151), a protruding partition (153) is provided at the bottom of the second material receiving groove (152), a plurality of second vent holes (155) are provided at the bottom of the second material receiving groove (152) away from the partition (153), a second air extraction groove (156) communicating with the second vent holes (155) is provided inside the second mold body (151), an air suction device is connected to the second air extraction groove (156), the second pressure plate (16) is located directly above the second material receiving groove (152) and can move up and down directly above the second material receiving groove (152), the second pressure plate (16) is driven by a third lifting mechanism (17), and a mating groove (18) for the partition (153) to be inserted is provided at the bottom of the second pressure plate (16). The second shaping mold (15) also includes a second movable plate (157) that can move up and down. The second movable plate (157) is located in the second air extraction groove (156) and is driven by the fourth lifting mechanism (158). The second movable plate (157) is provided with a plurality of second blocking columns (154). The second blocking columns (154) are directly opposite the second vent hole (155). When the second movable plate (157) moves upward, the second blocking columns (154) can block the second vent hole (155).

9. A method for preparing sleeping pants as described in any one of claims 1-8, characterized in that, The bottom film (3), the first absorbent core (4), the second absorbent core (5) and the skin-friendly surface layer (6) are bonded together in sequence, and then the bottom film (3) is fixed between the elastic front waistband (1) and the elastic back waistband (2) to obtain the sleeping pants.

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