Skin leakage-proof sanitary towel and manufacturing method
By designing leak-proof sides made of elastic waterproof cloth in women's sanitary napkins, the overall sanitary napkins are naturally bent, solving the problems of poor comfort and poor anti-side leakage effect of existing sanitary napkins, achieving higher wear comfort and anti-side leakage function.
Patent Information
- Application Number
- CN202510023654.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2025-03-07
AI Technical Summary
Existing women's sanitary napkin products have poor comfort when worn, which is prone to liquid leakage. The common planar structure does not fit the human body curve, resulting in separation and side leakage.
A body-mounted leak-proof sanitary napkin is designed, with leak-proof sides made of core, surface layer, base film and elastic waterproof cloth. Through the elastic shrinkage of the leak-proof side, the sanitary napkin is naturally bent overall, improving the anti-side leakage effect.
It realizes the natural bend of the sanitary napkin, improves the wearing comfort and anti-side leakage function, and enhances the liquid storage capacity and body feeling.
Smart Images
Figure CN119564406A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a manufacturing technology of a sanitary napkin for women, in particular to a body-fitting leak-proof sanitary napkin and a manufacturing method thereof. Background Art
[0002] Most existing sanitary napkins for women are flat and do not fit the curves of the human body. They bend with the underwear when used. The disadvantage is that they are not comfortable to wear. The core of the sanitary napkin is folded after forced bending, which is prone to liquid leakage. When the human body lies flat or on the side, the flat sanitary napkin is easy to separate from the human body and is also prone to side leakage. There are also some flat sanitary napkins + side elastic structures. The sanitary napkins add elastics to the flat water-repellent retaining edges to achieve bending. Although this type of sanitary napkin has the effect of blocking the lateral diffusion of liquid, the effect is not obvious. The elastic feels rough after being compounded with the non-woven fabric, and rubs the skin when it comes into contact with the thigh root, which is easy to cause allergies and discomfort in the female private parts. Summary of the invention
[0003] The purpose of the present invention is to provide a body-fitting leak-proof sanitary napkin and a manufacturing method thereof, so that the sanitary napkin can be bent in a natural state, thereby improving the comfort of use and the side leakage prevention effect.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is: a body-fitting leak-proof sanitary napkin, comprising a core body (10), a surface layer (20) and a bottom film (30), wherein the core body is arranged between the surface layer and the bottom film, and leak-proof side edges (40) are provided on both sides of the core body (10), and the leak-proof side edges (40) are fitted with the surface layer (20) and the bottom film (30), and the core body, the surface layer, the bottom film and the leak-proof side edges are bent toward the side of the surface layer.
[0005] Furthermore, in order to realize the curved structure of the sanitary napkin, the leak-proof side edges (40) are leak-proof side edges made of elastic water-repellent fabric.
[0006] Furthermore, a preferred curved structure of the sanitary napkin is that the leakage-proof side edge (40) is fitted to the surface layer (20) through elastic contraction.
[0007] Furthermore, a combined structure of a leak-proof sanitary napkin with a core-fitting structure is that the core (10) is fitted with the surface layer (20) and the bottom film (30), the leak-proof side edge (40) comprises a leak-proof side edge main body layer (41) and a leak-proof side edge folding layer (42), the leak-proof side edge main body layer (41) is fitted with the bottom film (30), the leak-proof side edge folding layer (42) is folded toward the surface layer (20), the leak-proof side edge folding layer (42) is partially fitted with the surface layer (20) in the middle, and the leak-proof side edge folding layer (42) is completely fitted with the surface layer (20) at both ends.
[0008] Furthermore, a composite structure of a leakproof sanitary napkin with a core suspension structure is that the core (10) is fitted with the surface layer (20), the leakproof side edge comprises a leakproof side edge folding layer (43) and a leakproof side edge folding layer (42), the leakproof side edge folding layer (43) covers from the side edge of the core to the bottom surface of the core, a bottom film cushion layer (50) is provided between the leakproof side edge (40) and the bottom film, and the leakproof side edge folding layer (42) is provided with a bottom film cushion layer (50). 3) is arranged between the core body (10) and the bottom film cushion layer (50), the inner edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) via structural adhesive (45) over the entire length, the outer edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) at both ends via structural adhesive (46), and the outer edge of the leakproof side folded back layer (43) is separated from the bottom film cushion layer (50) in the middle.
[0009] Furthermore, in order to obtain a good leak-proof side edge folding effect, the length (S) of the separation section between the leak-proof side edge folding layer (43) and the bottom film pad layer (50) is 0.4 to 0.8 times the total length (L) of the sanitary napkin.
[0010] Furthermore, the bottom film cushion layer (50) is a non-elastic water-repellent fabric.
[0011] A method for manufacturing a leak-proof sanitary napkin with a core-fitting structure, the manufacturing method comprising the following steps: a. elastically stretching the elastic water-repellent fabric (4a) on a continuous production line; b. folding the inner side of the elastic water-repellent fabric to form a leakproof side folding layer (42), thereby forming a leakproof side (40) consisting of the leakproof side body layer (41) and the leakproof side folding layer (42); c. The surface layer (20) and the leakproof side folded layer (42) are bonded together, and the leakproof side folded layer (42) and the surface layer (20) are bonded partially with a structural adhesive (21) so that the leakproof side folded layer (42) forms a free edge (42a) in the middle; d. The core (10) and the surface layer (20) are bonded together using a structural adhesive, and the surface layer (20) is used to form a guide groove (22) by rolling with a guide roller; e. The bottom film 30 and the core (10) are bonded together using a structural adhesive, thereby constituting a sanitary napkin structure composed of a core (10), a surface layer (20), a bottom film (30) and a leak-proof side edge (40), f. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal (60), and the sanitary napkin structure is cut into a sanitary napkin shape.
[0012] A method for manufacturing a leak-proof sanitary napkin with a core suspension structure, the manufacturing method comprising the following steps: a. Stretch the elastic water-repellent fabric on a continuous production line; b. folding the inner side edge of the elastic water-repellent fabric to form a leakproof side folded layer (42); c. The surface layer (20) and the leakproof side folded layer (42) are bonded together, and the leakproof side folded layer (42) and the surface layer (20) are bonded partially with a structural adhesive (21) so that the leakproof side folded layer (42) forms a free edge (42a) in the middle; d. The core 10 and the surface layer (20) are bonded together using a structural adhesive (12), and the surface layer (20) is used to form a guide groove (22) by rolling with a guide roller; e. The outer edge of the stretch water-repellent fabric is wrapped from the side of the core to the bottom surface of the core to form a leak-proof side folded back layer (43); f. The leakproof side folded back layer (43) and the bottom film cushion layer (50) are bonded together by structural adhesive, the inner edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) over the entire length (L) by structural adhesive (45), the outer edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) at both ends by structural adhesive, and the outer edge of the leakproof side folded back layer (43) is separated from the bottom film cushion layer (50) in the middle (S segment); g. The bottom film cushion (50) and the bottom film (30) are bonded together using a structural adhesive (51), thereby constituting a sanitary napkin structure composed of a core (10), a surface layer (20), a bottom film (30), a leakproof side edge (40) and a bottom film cushion (50); h. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal (60), and the sanitary napkin structure is cut into a sanitary napkin shape.
[0013] The beneficial effects of the present invention are: elastic leak-proof side edges are adopted, and the elastic recovery function of the leak-proof side edges is utilized to realize the natural bending of the sanitary napkin as a whole; the leak-proof side edges are made of water-repellent cloth material commonly used in sanitary napkins, and have a good contact feel with the human body; the naturally curved sanitary napkin is comfortable to wear and has a strong side leakage prevention function; the body-fitting leak-proof sanitary napkin with a core suspension structure has a larger liquid holding capacity and a better body feel.
[0014] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural diagram of the appearance of the leak-proof sanitary napkin with a core-fitting structure according to the present invention; Figure 2 It is a side view of the leak-proof sanitary napkin with a core-fitting structure according to the present invention; Figure 3This is a surface view of the leak-proof sanitary napkin with a core-fitting structure according to the present invention; Figure 4 This is a disassembled diagram of the structure of the leak-proof sanitary napkin with a core-fitting structure according to the present invention; Figure 5 yes Figure 1 AA section view; Figure 6 yes Figure 1 BB cross-section diagram; Figure 7 It is a schematic diagram of the production of a leak-proof sanitary napkin with a core-fitting structure, in which the elastic water-repellent fabric is stretched; Figure 8 4 is a schematic diagram of the present invention, wherein the inner side of the elastic water-repellent fabric is folded to form a leak-proof side folding layer 42, so as to form a leak-proof side 40 composed of a leak-proof side body layer 41 and a leak-proof side folding layer 42; Fig. 9 It is a schematic diagram of manufacturing a leak-proof sanitary napkin with a core-fitting structure, wherein the surface layer 20 is fitted with the leak-proof side folding layer 42, the core 10 is fitted with the surface layer 20, and the surface layer 20 is rolled to form a guide groove 22; Fig.10 It is a schematic diagram of manufacturing a leak-proof sanitary napkin with a core-fitting structure, wherein the bottom film 30 is bonded and fitted to the core 10; Fig.11 Schematic diagram of the manufacture of a leak-proof sanitary napkin with a core-fitting structure, with peripheral seals 60 formed at both ends of the sanitary napkin structure, and the shape of the sanitary napkin is cut out; Fig.12 It is a view of the surface layer 20 of the leak-proof sanitary napkin with a core suspension structure according to the present invention; Fig.13 yes Fig.11 CC profile of ; Fig.14 yes Fig.11 DD profile diagram; Fig.15 yes Fig.11 EE profile of Fig.16 yes Fig.14 FF cross-sectional view, showing the position of the structural adhesive on the bottom film cushion layer 50; Fig.17 It is a schematic diagram of manufacturing a leak-proof sanitary napkin with a core suspension structure, in which the elastic water-repellent fabric is stretched; Fig.18 It is a schematic diagram of manufacturing a leak-proof sanitary napkin with a core suspension structure, wherein the inner side edge of the elastic water-repellent fabric is folded to form a leak-proof side folded layer 42; Fig.19It is a schematic diagram of manufacturing a leakproof sanitary napkin with a core suspension structure, wherein the outer edge of the elastic water-repellent fabric is wrapped from the side of the core to the bottom of the core to form a leakproof side folded back layer 43; Fig. 20 It is a schematic diagram of manufacturing a leak-proof sanitary napkin with a core suspension structure, wherein the leak-proof side folded back layer 43 is laminated to the bottom film cushion layer 50 , and the bottom film cushion layer 50 is laminated to the bottom film 30 . DETAILED DESCRIPTION
[0016] Embodiment 1: like Figures 1 to 6 A leak-proof sanitary napkin with a core-fitting structure comprises a core 10, a surface layer 20, a bottom film 30 and two leak-proof side edges 40.
[0017] The core body 10 is made of wood pulp, water-absorbent polymer material, toilet paper or absorbent paper and other materials through a die wheel molding, and the core body 10 has a strong liquid absorption function.
[0018] The core 10 is arranged between the surface layer 20 and the bottom film 30. The surface layer 20 covers the core 10, and the surface layer 20 is the contact layer with the human body. The core 10 and the surface layer 20 are bonded and attached by using a structural adhesive 12, and a guide groove 22 is provided on the surface layer 20. The bottom film 30 is also bonded and attached to the core 10 by using a structural adhesive 13. The area of the bottom film 30 is larger than that of the core 10, and the bottom film is provided with side wings 32 on both sides of the core.
[0019] Two leakproof side edges 40 are arranged on both sides of the core body 10. The leakproof side edges 40 are made of elastic water-repellent fabric.
[0020] Elastic water-repellent fabric is a kind of elastic non-woven fabric with longitudinal elasticity and water-repellent properties. Elastic non-woven fabric has certain elasticity and tensile strength in a specific direction by adding polymers and fiber reinforcements on the fiber surface and controlling the fiber arrangement direction. Elastic non-woven fabrics are widely used in healthcare, household cleaning, personal care and industrial fields. They are most widely used in the healthcare field, including sterile bandages, surgical gowns, surgical masks and other products. They are also widely used in the personal care field, such as wet wipes, panty liners, diapers and other products. Elastic water-repellent fabric is based on elastic non-woven fabric, and water-repellent substances are added to the fiber surface, so that the liquid flows along the surface of the non-woven fabric without penetrating, thereby achieving a water-repellent effect.
[0021] The leakproof side edge 40 includes a leakproof side edge main body layer 41 and a leakproof side edge folding layer 42. The leakproof side edge main body layer 41 is provided with an outer shape corresponding to the bottom film 30 and is provided with a wing edge 44. The leakproof side edge folding layer 42 is a 180° folded edge on the leakproof side edge main body layer 41, and the leakproof side edge folding layer 42 is folded toward the surface layer 20. The leakproof side edge folding layer 42 is bonded to the surface layer 20 through elastic contraction, and the bonding method is structural adhesive bonding. The leakproof side edge folding layer 42 is partially bonded to the surface layer 20 in the middle, and the structural adhesive 21 is bonded to the leakproof side edge folding layer 42 at the edge of the surface layer 20, so that the leakproof side edge folding layer 42 forms a free edge 42a in the middle. The leakproof side edge folding layer 42 is completely bonded to the surface layer 20 at both ends.
[0022] The leakproof side body layer 41 is bonded to the bottom film 30 by means of a structural adhesive 33 . The leakproof side body layer 41 and the bottom film 30 are bonded in a natural state, that is, non-elastically shrinkable bonding.
[0023] Due to the elastic contraction of the leak-proof side edge folding layer 42 , the overall structure of the sanitary napkin (including the core 10 , the surface layer 20 , the bottom film 30 and the leak-proof side edge 40 ) is bent, with the bending direction being toward the surface layer 20 side.
[0024] When the sanitary napkin is in a bent state, the free edge 42a can be turned up, so that the leak-proof side folded layer 42 forms a "cofferdam" structure, which can prevent liquid from leaking out and improve the sanitary napkin's ability to contain liquid.
[0025] This embodiment adopts elastic leak-proof side edges, and utilizes the elastic recovery function of the leak-proof side edges to allow the sanitary napkin to maintain a natural curvature as a whole. The leak-proof side edges are made of water-repellent cloth material commonly used in sanitary napkins, have a good contact feel with the human body, are comfortable to wear, and have a strong side leakage prevention function.
[0026] Embodiment 2: like Figures 7 to 10 , A method for manufacturing a leak-proof sanitary napkin with a core-fitting structure, which is the method for manufacturing the leak-proof sanitary napkin according to Embodiment 1, and the steps of the manufacturing method include: a. On a continuous production line, the elastic water-repellent fabric 4a is stretched elastically, such as Figure 7 As shown; b. Fold the inner side of the elastic water-repellent fabric to form a leakproof side folded layer 42, so as to form a leakproof side 40 composed of a leakproof side body layer 41 and a leakproof side folded layer 42. Figure 8 shown.
[0027] c. The surface layer 20 and the leakproof side folded layer 42 are bonded together, the leakproof side folded layer 42 and the surface layer 20 are bonded together using a structural adhesive 21, so that the leakproof side folded layer 42 forms a free edge 42a in the middle, such as Fig. 9shown.
[0028] d. The core 10 and the surface layer 20 are bonded together using a structural adhesive 12, and the surface layer 20 is used to form a guide groove 22 by rolling using a guide roller, such as Fig. 9 shown.
[0029] e The base film 30 and the core 10 are bonded together using structural adhesive 13, such as Fig.10 As shown, the sanitary napkin structure composed of the core 10, the surface layer 20, the bottom film 30 and the leakage-proof side edges 40 is formed.
[0030] f. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal 60, and the sanitary napkin structure is cut into a sanitary napkin shape, such as Fig.11 shown.
[0031] The two leak-proof side edges 40 of the cut sanitary napkin will elastically shrink to form a curved (crescent-shaped) sanitary napkin. The leak-proof side folded layer 42 is completely attached to the core 10, the surface layer 20, and the bottom film 30 at the periphery seals 60 at both ends. The elastic recovery of the leak-proof side edge 40 causes the sanitary napkin to bend toward the surface layer. The free edge 42a of the leak-proof side folded layer 42 in the middle is raised on the surface layer, such as Figure 1 By adjusting the elastic stretch length of the leakage-proof side folded layer 42, sanitary napkins with different curvatures can be obtained.
[0032] Embodiment three: like Figures 11 to 14 , a leakproof sanitary napkin with a core suspension structure, which is an improvement of the first embodiment, comprises a core 10, a surface layer 20, a bottom film 30 and two leakproof side edges 40. The two leakproof side edges 40 are arranged on both sides of the core.
[0033] In this embodiment, the core 10 and the surface layer 20 are bonded together by structural adhesive, and the leakproof side edge 40 includes a leakproof side edge folding layer 43 and a leakproof side edge folding layer 42. The leakproof side edge folding layer 43 covers from the side of the core to the bottom of the core.
[0034] Similar to the first embodiment, the leakproof side folded layer 42 is folded toward the surface layer 20, and the leakproof side folded layer 42 is partially attached to the surface layer 20, so that the leakproof side folded layer 42 forms a free edge 42a. The leakproof side folded layer 42 is bonded to the surface layer 20 by means of structural adhesive through elastic contraction. Due to the elastic contraction of the leakproof side folded layer 42 and the leakproof side folded back layer 43, the core 10, the surface layer 20 and the leakproof side edge 40 are bent, and the bending direction is toward the side of the surface layer 20. When the sanitary napkin is in a bent state, the free edge 42a can be turned up, such as Fig.14 , 15 shown.
[0035] A bottom film cushion layer 50 is provided between the leakproof side edge 40 and the bottom film, and a leakproof side edge folded back layer 43 is provided between the core body 10 and the bottom film cushion layer 50. The bottom film cushion layer 50 is made of water-repellent fabric, and since the bottom film cushion layer 50 does not need elastic deformation, in this embodiment, the bottom film cushion layer is made of non-elastic water-repellent fabric.
[0036] The leakproof side folded back layer 43 and the bottom film cushion layer 50 are bonded together by structural adhesive. The inner edge of the leakproof side folded back layer 43 is bonded to the bottom film cushion layer 50 through structural adhesive 45 over the entire length (L), and the outer edge of the leakproof side folded back layer 43 is bonded to the bottom film cushion layer 50 through structural adhesive 46 at both ends. Fig.14 , Fig.16 The outer edge of the leakproof side folded back layer 43 is separated from the bottom film cushion layer 50 in the middle (not attached to the bottom film cushion layer 50). When the core 10, the surface layer 20 and the leakproof side 40 are bent, the outer side of the leakproof side folded back layer 43 can be turned up on the bottom film cushion layer 50 in the middle separation section (S section), so that the core 10 and the two sides of the surface layer 20 and the leakproof side 40 form a suspended portion 47, as shown in FIG. Fig.15 As shown, due to the elastic contraction of the leak-proof side edge 40, the closer the floating portion 47 is to the middle of the sanitary napkin, the greater the amount of its flipping. The length S of the separation section in the middle of the outer side of the leak-proof side edge folded back layer 43 is 0.4 to 0.8 times the total length L.
[0037] The bottom film cushion layer 50 is divided into two pieces, and each bottom film cushion layer 50 corresponds to one leakproof side edge 40. The bottom film cushion layer 50 is bonded to the bottom film 30 by means of structural adhesive.
[0038] Embodiment 4: A method for manufacturing a leak-proof sanitary napkin with a core suspension structure. The method is the method for manufacturing the leak-proof sanitary napkin with a core suspension structure according to the third embodiment. The steps of the manufacturing method include: a. elastically stretching the elastic water-repellent fabric serving as the leakproof side edge 40 on a continuous production line; b. Fold the inner side edge of the elastic water-repellent fabric to form a leakproof side folded layer 42.
[0039] c. The surface layer 20 is fitted with the leakproof side folded layer 42, and the leakproof side folded layer 42 is bonded to the surface layer 20 using a structural adhesive 21 to partially fit the leakproof side folded layer 42 in the middle to form a free edge 42a.
[0040] d. The core 10 and the surface layer 20 are bonded together using a structural adhesive 12, and a guide groove 22 is formed by rolling the surface of the surface layer 20 using a guide roller.
[0041] e. The outer side of the elastic water-repellent fabric is wrapped from the side of the core to the bottom surface of the core to form a leak-proof side folded back layer 43.
[0042] f. The leakproof side folded-back layer 43 is bonded to the bottom film cushion layer 50 by means of structural adhesive. The inner edge of the leakproof side folded-back layer 43 is bonded to the bottom film cushion layer 50 by means of structural adhesive 45 over the entire length (L). The outer edge of the leakproof side folded-back layer 43 is bonded to the bottom film cushion layer 50 by means of structural adhesive 46 at both ends. The outer edge of the leakproof side folded-back layer 43 is separated from the bottom film cushion layer 50 in the middle (segment S) (not bonded to the bottom film cushion layer 50).
[0043] g. The bottom film cushion layer 50 and the bottom film 30 are bonded and attached with the structural adhesive 51, so as to form a sanitary napkin structure composed of the core 10, the surface layer 20, the bottom film 30, the leakproof side edge 40 and the bottom film cushion layer 50.
[0044] h. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal 60, and the sanitary napkin structure is cut into a sanitary napkin shape, such as Fig.12 shown.
[0045] Thus, the manufacture of the core suspended structure body-fitting leakproof sanitary napkin is completed. The two leakproof side edges 40 of the manufactured sanitary napkin will elastically shrink relative to the bottom film cushion layer 50 and the bottom film 30 to form a curved (crescent-shaped) sanitary napkin, the free edge 42a of the leakproof side edge folded layer 42 in the middle is tilted on the surface layer, and the suspended portion 47 of the leakproof side edge is also tilted from the bottom film cushion layer 50.
Claims
1. A leak-proof sanitary napkin for body contact, comprising a core (10), a surface layer (20) and a bottom film (30), wherein the core is arranged between the surface layer and the bottom film, and characterized in that: Leakage-proof side edges (40) are provided on both sides of the core (10), the leakage-proof side edges (40) are in contact with the surface layer (20) and the bottom film (30), and the core, surface layer, bottom film and leakage-proof side edges are bent towards the surface layer.
2. The leak-proof sanitary napkin according to claim 1, characterized in that: The leakproof side edges (40) are leakproof side edges made of elastic water-repellent fabric.
3. The leak-proof sanitary napkin according to claim 1, characterized in that: The leak-proof side edge (40) is fitted to the surface layer (20) through elastic contraction.
4. The leak-proof sanitary napkin according to claim 1, characterized in that: The core (10) is bonded to the surface layer (20) and the bottom film (30); the leakproof side edge (40) comprises a leakproof side edge main body layer (41) and a leakproof side edge folding layer (42); the leakproof side edge main body layer (41) is bonded to the bottom film (30); the leakproof side edge folding layer (42) is folded toward the surface layer (20); the leakproof side edge folding layer (42) is partially bonded to the surface layer (20) in the middle; and the leakproof side edge folding layer (42) is completely bonded to the surface layer (20) at both ends.
5. The leak-proof sanitary napkin according to claim 1, characterized in that: The core body (10) is bonded to the surface layer (20); the leakproof side edge comprises a leakproof side edge folded back layer (43) and a leakproof side edge folded layer (42); the leakproof side edge folded back layer (43) covers from the side edge of the core body to the bottom surface of the core body; a bottom film cushion layer (50) is provided between the leakproof side edge (40) and the bottom film; the leakproof side edge folded back layer (43) is arranged between the core body (10) and the bottom film cushion layer (50); the inner edge of the leakproof side edge folded back layer (43) is bonded to the bottom film cushion layer (50) over the entire length by structural adhesive; the outer edge of the leakproof side edge folded back layer (43) is bonded to the bottom film cushion layer (50) at both ends by structural adhesive; and the outer edge of the leakproof side edge folded back layer (43) is separated from the bottom film cushion layer (50) in the middle.
6. The leak-proof sanitary napkin according to claim 5, characterized in that: The length (S) of the separation section between the leakage-proof side folded-back layer (43) and the bottom film cushion layer (50) is 0.4 to 0.8 times the total length (L) of the sanitary napkin.
7. The leak-proof sanitary napkin according to claim 5, characterized in that: The bottom film cushion layer (50) is a non-elastic water-repellent fabric.
8. A method for manufacturing a leak-proof sanitary napkin with a core-fitting structure, the method being the method for manufacturing a leak-proof sanitary napkin with a core-fitting structure as claimed in any one of claims 1 to 4, characterized in that: The steps of the manufacturing method include: a. elastically stretching the elastic water-repellent fabric (4a) on a continuous production line; b. folding the inner side of the elastic water-repellent fabric to form a leakproof side folding layer (42), thereby forming a leakproof side (40) consisting of the leakproof side body layer (41) and the leakproof side folding layer (42); c. The surface layer (20) and the leakproof side folded layer (42) are bonded together, and the leakproof side folded layer (42) and the surface layer (20) are bonded partially with a structural adhesive so that the leakproof side folded layer (42) forms a free edge (42a) in the middle; d. The core (10) and the surface layer (20) are bonded together using a structural adhesive, and the surface layer (20) is used to form a guide groove (22) by rolling with a guide roller; e. The bottom film 30 and the core (10) are bonded together using a structural adhesive, thereby constituting a sanitary napkin structure composed of a core (10), a surface layer (20), a bottom film (30) and a leak-proof side edge (40), f. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal (60), and the sanitary napkin structure is cut into a sanitary napkin shape.
9. A method for manufacturing a leak-proof sanitary napkin with a core suspension structure, the method being the method for manufacturing a leak-proof sanitary napkin according to any one of claims 1, 2, 3, 5, 6 and 7, characterized in that: The steps of the manufacturing method include: a. Stretch the elastic water-repellent fabric on a continuous production line; b. folding the inner side edge of the elastic water-repellent fabric to form a leakproof side folded layer (42); c. The surface layer (20) and the leakproof side folded layer (42) are bonded together, and the leakproof side folded layer (42) and the surface layer (20) are bonded partially with a structural adhesive so that the leakproof side folded layer (42) forms a free edge (42a) in the middle; d. The core 10 and the surface layer (20) are bonded together using a structural adhesive, and the surface layer (20) is used to form a guide groove (22) by rolling with a guide roller; e. The outer edge of the stretch water-repellent fabric is wrapped from the side of the core to the bottom surface of the core to form a leak-proof side folded back layer (43); f. The leakproof side folded back layer (43) and the bottom film cushion layer (50) are bonded together by structural adhesive, the inner edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) by structural adhesive over the entire length (L), the outer edge of the leakproof side folded back layer (43) is bonded to the bottom film cushion layer (50) at both ends by structural adhesive, and the outer edge of the leakproof side folded back layer (43) is separated from the bottom film cushion layer (50) in the middle (S segment); g. The bottom film cushion (50) and the bottom film (30) are bonded together using a structural adhesive to form a sanitary napkin structure composed of a core (10), a surface layer (20), a bottom film (30), a leakproof side edge (40) and a bottom film cushion (50); h. The two ends of the sanitary napkin structure are reinforced by a composite process such as hot rolling or ultrasonic lamination or gluing to form a peripheral seal (60), and the sanitary napkin structure is cut into a sanitary napkin shape.