Leakage-proof sanitary towel

Abstract

The utility model discloses a leakage-proof sanitary towel which comprises a sanitary towel body, a surface layer, a flow guide layer, a water absorption layer, a waterproof bottom layer and a water retaining structure. The surface layer comprises a first drainage structure, a second drainage structure, a third drainage structure and a fourth drainage structure which are sequentially arranged from the upper part to the lower part of the surface layer; the water absorption layer comprises a first absorption structure and a second absorption structure wrapping the first absorption structure; the water retaining structure comprises fixing parts fixed to the two sides of the surface layer in the width direction and water retaining parts connected with the fixing parts. The first elastic structure is arranged on the upper portion of the width direction of the water retaining part in the length direction of the surface layer, the second elastic structure is arranged in the middle of the width direction of the water retaining part in the length direction of the surface layer, and the third elastic structure is arranged on the lower portion of the width direction of the water retaining part in the length direction of the surface layer. Reverse osmosis is not prone to occurring, and the leakage-proof effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary napkins, in particular to a leak-proof sanitary napkin. Background Art

[0002] As society develops, women's pursuit of quality in sanitary products is getting higher and higher. Due to the heavy menstrual blood volume during menstruation, some women are prone to leakage at the edge of sanitary napkins. Under the influence of surface friction, menstrual blood deviates from the direction of gravity and flows along the convex surface. Therefore, when the sanitary napkin fabric seeps down from the surface, it cannot be absorbed by the surface in time due to the heavy menstrual blood volume, and overflows along the surface to the edge of the sanitary napkin. Some of the menstrual blood will seep back out after being absorbed by the absorbent layer, causing menstrual blood leakage. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a leak-proof sanitary napkin with good drainage effect, low back seepage and good leak-proof effect.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The embodiment of the utility model provides a leak-proof sanitary napkin, comprising a sanitary napkin body, wherein the sanitary napkin body comprises a surface layer, a guide layer, a water-absorbing layer, and a waterproof bottom layer arranged in sequence from top to bottom, and the sanitary napkin body further comprises a water-retaining structure arranged on both sides of the surface layer;

[0006] The surface layer includes a first drainage structure, a second drainage structure, a third drainage structure and a fourth drainage structure arranged in sequence from the upper part of the surface layer to the lower part;

[0007] The water-absorbing layer comprises a first absorbent structure and a second absorbent structure wrapping the first absorbent structure, and the water-absorbing layer is used to gather the absorbed liquid in the middle of the sanitary napkin body;

[0008] The water retaining structure includes a first water retaining structure and a second water retaining structure fixed on both sides of the surface layer in the width direction. The first water retaining structure and the second water retaining structure both include a fixed part fixed on the surface layer and a water retaining part connected to the fixed part. The water retaining part includes a first elastic structure arranged along the length direction of the surface layer at the upper part in the width direction of the water retaining part, a second elastic structure arranged along the length direction of the surface layer at the middle part in the width direction of the water retaining part, and a third elastic structure arranged along the length direction of the surface layer at the lower part in the width direction of the water retaining part. The water retaining structure is used to prevent liquid from overflowing to both sides.

[0009] According to some embodiments of the present invention, the elastic contraction force of the first elastic structure is greater than the elastic contraction force of the second elastic structure.

[0010] According to some embodiments of the present invention, the first elastic structure is arranged between the top of the water retaining part and one-third below the top, the second elastic structure is arranged between one-third and two-thirds below the top of the water retaining part, and the third elastic structure is arranged between the bottom of the water retaining part and one-third above the bottom.

[0011] According to some embodiments of the present invention, the first elastic structure includes a first elastic line and a second elastic line arranged in parallel, the first elastic line is arranged at the top of the water retaining portion, and the second elastic line is arranged at one-sixth of the distance from the top of the water retaining portion. The second elastic structure includes a third elastic line parallel to the first elastic structure, and the third elastic line is arranged at one-third of the distance from the top of the water retaining portion. The third elastic structure includes a fourth elastic line parallel to the first elastic structure, and the fourth elastic line is arranged at one-sixth of the distance from the bottom of the water retaining portion in the width direction.

[0012] According to some embodiments of the present invention, the fixing portion includes a first pressing portion arranged on the upper part of the surface layer and a second pressing portion arranged on the lower part of the surface layer, and the pressing length of the first pressing portion is less than or equal to the pressing length of the second pressing portion.

[0013] According to some embodiments of the present invention, the pressing length of the first pressing portion is in the range of 5-12 cm, and the pressing length of the second pressing portion is in the range of 8-15 cm.

[0014] According to some embodiments of the present invention, the first absorbent structure is surrounded and wrapped by the second absorbent structure or embedded in the second absorbent structure.

[0015] According to some embodiments of the present invention, the first drainage structure has an upper portion in an arc shape and a lower portion in an open shape;

[0016] The third drainage structure has an upper portion with an opening shape and a lower portion with an arc shape;

[0017] The upper portion of the second drainage structure is an opening shape with a width smaller than the lower portion of the first drainage structure, and the lower portion of the second drainage structure is an opening shape with a width smaller than the upper portion of the third drainage structure. Both sides of the second drainage structure are inserted into the first drainage structure and the third drainage structure respectively;

[0018] The fourth drainage structure has an upper portion with an opening shape and a lower portion with an arc structure.

[0019] According to some embodiments of the present invention, there are also two side waterproof structures arranged between the surface layer and the waterproof bottom layer, and the two side waterproof structures each include a third pressing portion connected to the surface layer and a fourth pressing portion connected to the waterproof bottom layer.

[0020] According to some embodiments of the present invention, the surface layer has concave diamond-shaped patterns, and guide holes are provided at the intersections of the respective diamond-shaped patterns.

[0021] The utility model has at least the following beneficial effects:

[0022] The drainage structure guides and absorbs the liquid, preventing the liquid from gathering in a local location, increasing the liquid infiltration time, and reducing the chance of liquid leaking to the sides of the sanitary napkin; the water-retaining structure forms a water-retaining part with a certain height through the elastic structure, which can effectively prevent the liquid from leaking to the sides; the second absorption structure covers the first absorption structure, reducing the back seepage phenomenon, and gathering the absorbed liquid on the covering structure. The sanitary napkin has a good drainage effect, is not easy to back seep, and has an excellent leakage prevention effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;

[0024] Figure 2 A cross-sectional view of another embodiment of the present invention;

[0025] Figure 3 This is a structural diagram of an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] The following description of the present invention, with reference to the accompanying drawings, is provided to facilitate a more comprehensive understanding of the various embodiments of the present invention as defined in the claims and their equivalents. The description includes various specific details to assist understanding, but these details should be construed as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present invention.

[0027] In the description of the present invention, descriptions of directions, such as up, down, front, back, left, right, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0028] It will be understood that when one element (e.g., a first element) is “connected” to another element (e.g., a second element), the element may be directly connected to the other element or an intervening element (e.g., a third element) may be present between the element and the other element.

[0029] The embodiment of the utility model provides a leak-proof sanitary napkin, which has good drainage effect, is not easy to reverse seepage, and has good leak-proof effect. Figure 1-3 As shown, the sanitary napkin comprises a sanitary napkin body 1, which comprises a surface layer 2, a guide layer 3, a water-absorbing layer 4 and a waterproof bottom layer 5 arranged in sequence from top to bottom. The sanitary napkin body 1 also comprises a water-retaining structure 6 arranged on both sides of the surface layer 2;

[0030] The surface layer 2 includes a first drainage structure 210, a second drainage structure 220, a third drainage structure 230, and a fourth drainage structure 240, which are arranged in sequence from the upper part of the surface layer 2 to the lower part. Specifically, when liquid is discharged onto the surface layer 2, it generally first contacts the liquid at the second drainage structure 220 in the middle of the surface layer 2. The surface layer 2 is provided with a structure to accelerate absorption. However, when faced with a large amount of liquid, it cannot be absorbed into the guiding layer 3 below at once. At this time, the liquid is guided from the second drainage structure 220 to the first drainage structure 210 and the third drainage structure 230, increasing the infiltration area. The fourth drainage structure 240 is added to further block the liquid flowing out of the third drainage structure 230. The drainage structure guides and absorbs the liquid, prevents the liquid from gathering in a local position, increases the liquid infiltration time, and reduces the chance of liquid leaking to the sides of the sanitary napkin.

[0031] The water-absorbing layer 4 includes a first absorbent structure 410 and a second absorbent structure 420 that wraps the first absorbent structure 410. The water-absorbing layer 4 is used to collect the absorbed liquid in the middle of the sanitary napkin body 1. When the liquid penetrates under the surface layer 2, it passes through the guide layer 3 to the water-absorbing layer 4. The first absorbent structure 410 can be made of a polymer absorbent material, a coarse fiber material, a water-absorbing material, or a composite material thereof. The first absorbent structure 410 has an extremely high water absorption rate, but is prone to back-seepage and poor comfort. The second absorbent structure 420 covers the first absorbent structure 410, collecting the absorbed liquid on the covering structure, thereby improving the comfort of the sanitary napkin and reducing back-seepage.

[0032] The water retaining structure 6 includes a first water retaining structure 601 and a second water retaining structure 602 fixed on both sides of the surface layer 2 in the width direction. The first water retaining structure 601 and the second water retaining structure 602 both include a fixing part 610 fixed on the surface layer 2 and a water retaining part 620 connected to the fixing part 610. The water retaining part 620 includes a first elastic structure 630 arranged at the upper part of the water retaining part 620 in the width direction along the length direction of the surface layer 2, a second elastic structure 640 arranged at the middle part of the water retaining part 620 in the width direction along the length direction of the surface layer 2, and a third elastic structure 650 arranged at the lower part of the water retaining part 620 in the width direction along the length direction of the surface layer 2. The water retaining structure 6 is used to prevent liquid from overflowing to both sides.

[0033] The water retaining structure 6 is arranged on both sides of the surface layer 2 of the sanitary napkin in the width direction, which is convenient for blocking liquid that flows to both sides due to excessive flow rate. The fixing part 610 of the water retaining structure 6 can be fixed on the surface layer 2 by structural glue, pressing, etc. Before the sanitary napkin is used, the water retaining structure 6 is in a folded state, which is convenient for packaging and transportation. When the sanitary napkin is used, the elastic structure is pulled to form a water retaining part 620 with a certain height, which is convenient for blocking liquid. The first elastic structure 630 facilitates the water retaining part 620 to form an inward-buckling shape, so that it has a buffering and reflecting effect when impacted by liquid. The second elastic structure 640 arranged in the middle enhances the stability of the bending shape of the water retaining part 620, provides support for the inward-buckling shape of the water retaining part 620, and prevents the first elastic structure 630 from directly pulling the entire water retaining part 620 to form a flat shape. The third elastic structure 650 arranged at the bottom provides support for the bottom of the water retaining part 620 to prevent deformation caused by liquid impact. Each elastic structure can be one or more.

[0034] In some embodiments, as Figure 1-2 As shown, the elastic contraction force of the first elastic structure 630 is greater than the elastic contraction force of the second elastic structure 640, which facilitates the water retaining portion 620 to form an inwardly buckled shape during use, thereby buffering and blocking the liquid and reducing side leakage.

[0035] In some embodiments, as Figure 1-3 As shown, the first elastic structure 630 is arranged between the top of the water retaining part 620 and the lower third of the top, which is convenient for increasing the stability of the top of the water retaining part 620 and preventing the top elastic structure from being set too low and collapsing in an inward shape. The second elastic structure 640 is arranged between the lower third and two-thirds of the top of the water retaining part 620, which is convenient for the water retaining part 620 to form a higher inward shape. When the elastic structure is arranged in this interval, the anti-side leakage effect is better. If the position is too low, it will cause the actual height of the water retaining part 620 to be too low, affecting the anti-side leakage effect. The third elastic structure 650 is arranged between the bottom of the water retaining part 620 and the upper third of the bottom, which increases the support for the bottom of the water retaining part 620. The support effect in the interval is better and the water retaining effect is good.

[0036] Further, if Figure 1-2 As shown, the first elastic structure 630 includes a first elastic line 631 and a second elastic line 632 arranged in parallel. More than one parallel arrangement can increase the stability of the top of the water retaining portion 620. The first elastic line 631 is arranged at the top of the water retaining portion 620 to provide support for the top of the water retaining portion 620. The second elastic line 632 is arranged at one-sixth of the bottom of the water retaining portion 620 to provide further support for the top of the water retaining portion 620 and increase the top width. The second elastic structure 640 includes a third elastic line 641 parallel to the first elastic structure 630. The third elastic line 641 is arranged at one-third of the bottom of the water retaining portion 620. This position achieves a better supporting effect on the concave curvature. The third elastic structure 650 includes a fourth elastic line 651 parallel to the first elastic structure 630. The fourth elastic line 651 is arranged at one-sixth of the bottom in the width direction of the water retaining portion 620 to achieve a better supporting effect on the bottom of the water retaining portion 620.

[0037] In some embodiments, as Figure 3 As shown, the fixing portion 610 includes a first pressing portion 660 arranged on the upper part of the surface layer 2 and a second pressing portion 670 arranged on the lower part of the surface layer 2. The pressing length of the first pressing portion 660 is less than or equal to the pressing length of the second pressing portion 670. When the sanitary napkin is in use, the upper and lower sides are close to the skin, and the middle part will have a certain gap directly with the skin due to the influence of gravity. The water retaining portion 620 prevents liquid from leaking from both sides of the gap. The water retaining structure 6 is pressed at the upper and lower parts of the sanitary napkin body 1 that are close to the skin, which is equivalent to adjusting the starting point of the water retaining portion 620. In addition, when the sanitary napkin is actually used, the back part will be longer than or equal to the front part, and the pressing length should also be corresponding. The length of the first pressing portion 660 is less than or equal to the second pressing portion 670, so as to provide a better fitting effect for the water retaining portion 620.

[0038] Furthermore, the pressing length range of the first pressing part 660 is 5-12 cm, and the pressing length range of the second pressing part 670 is 8-15 cm. The pressing length can be appropriately adjusted according to the length of the sanitary napkin. The water-retaining structure 6 has a good effect when the pressing length of daily sanitary napkins is within this range.

[0039] In some embodiments, as Figure 1-2 As shown, the first absorbent structure 410 is wrapped around or embedded in the second absorbent structure 420 by the second absorbent structure 420. The material of the first absorbent structure 410 can be a polymer absorbent resin, fluff pulp, absorbent paper and other materials and their composite materials. The first absorbent structure 410 has a strong water absorption rate, but is prone to back seepage and poor comfort. A layer of the second absorbent structure 420 with certain water absorption but not easy to back seepage is wrapped on the outside. The second absorbent structure 420 can be dust-free paper. The wrapping method of the second absorbent structure 420 can be as follows Figure 1The first absorbent structure 410 is wrapped around the body as shown, and can also be as shown Figure 2 As shown, the first absorbent structure 410 is embedded in the second absorbent structure 420. The wrapped structure has a good anti-seepage effect, and the absorbed liquid is gathered on the wrapping structure to reduce the risk of side leakage.

[0040] In some embodiments, as Figure 3 As shown;

[0041] The first drainage structure 210 has an arc-shaped upper portion and an open lower portion. The open shape facilitates the flow of liquid into the first drainage structure 210, reducing side leakage of liquid. The arc-shaped upper portion effectively prevents unabsorbed liquid from flowing out of the upper portion of the sanitary napkin.

[0042] The third drainage structure 230 has an open top and an arc bottom. The open top facilitates the flow of liquid into the third drainage structure 230, reducing side leakage. The arc bottom effectively blocks the flow of incompletely absorbed liquid downward.

[0043] The upper portion of the second drainage structure 220 is an opening shape that is smaller than the width of the lower portion of the first drainage structure 210, and the lower portion of the second drainage structure 220 is an opening shape that is smaller than the width of the upper portion of the third drainage structure 230. The two sides of the second drainage structure 220 are respectively inserted into the first drainage structure 210 and the third drainage structure 230. In practice, liquid flows in from above the second drainage structure 220. The insertion of the openings on both sides of the second drainage structure 220 can quickly guide a large amount of liquid to flow in the direction of the first drainage structure 210 and the third drainage structure 230, thereby increasing the infiltration area. The openings of the first drainage structure 210 and the third drainage structure 230 expand outward, and can also guide liquid that exceeds the two sides of the second drainage structure 220 to enter. The drainage structure can effectively prevent excessive liquid accumulation from causing side leakage;

[0044] The fourth drainage structure 240 has an open shape at the top and an arc structure at the bottom. When using the sanitary napkin while lying down, the lower part of the sanitary napkin will absorb more liquid. The fourth drainage structure 240 is added to further receive and drain the liquid overflowing from the third drainage structure 230 and prevent leakage.

[0045] In some embodiments, as Figure 1-2As shown, a leak-proof sanitary napkin also includes two side waterproof structures 7 arranged between the surface layer 2 and the waterproof bottom layer 5. The two side waterproof structures 7 each include a third pressing portion 710 connected to the surface layer 2 and a fourth pressing portion 720 connected to the waterproof bottom layer 5. The third pressing portion 710 and the fourth pressing portion 720 can be pressed together with the overall edge sealing of the sanitary napkin body 1, or can be pressed separately with the surface layer 2 and the waterproof bottom layer 5 to form a sanitary napkin structure with a certain height, which has a better water absorption effect. The third and fourth pressing portions 720 can also be further fixed by gluing, and the side waterproof portions facilitate further blocking of the liquid in the guide layer 3 and the water absorption layer 4, thereby improving the waterproof and leak-proof effects.

[0046] In some embodiments, as Figure 3 As shown, the surface layer 2 has a concave diamond pattern, which prevents the liquid from flowing smoothly to both sides and causing leakage, and slows down the flow rate of the liquid on the surface layer. A guide hole 250 is provided at the intersection of each diamond pattern, which greatly improves the absorption speed and reduces side leakage.

[0047] The terms and words used in the above description and claims are not limited to their literal meanings, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present invention is provided for illustration only and is not intended to limit the present invention as defined in the appended claims and their equivalents.

Claims

1. A leak-proof sanitary napkin, comprising a sanitary napkin body (1), characterized in that: The sanitary napkin body (1) comprises a surface layer (2), a guide layer (3), a water-absorbing layer (4) and a waterproof bottom layer (5) arranged in sequence from top to bottom, and the sanitary napkin body (1) further comprises a water-retaining structure (6) arranged on both sides of the surface layer (2); The surface layer (2) comprises a first drainage structure (210), a second drainage structure (220), a third drainage structure (230) and a fourth drainage structure (240) which are sequentially arranged from the upper part to the lower part of the surface layer (2); The water-absorbing layer (4) comprises a first absorption structure (410) and a second absorption structure (420) wrapping the first absorption structure (410), and the water-absorbing layer (4) is used to gather absorbed liquid in the middle of the sanitary napkin body (1); The water retaining structure (6) comprises a first water retaining structure (601) and a second water retaining structure (602) fixed on both sides of the surface layer (2) in the width direction. The first water retaining structure (601) and the second water retaining structure (602) both comprise a fixing portion (610) fixed on the surface layer (2) and a water retaining portion (620) connected to the fixing portion (610). The water retaining portion (620) comprises a first elastic structure (630) arranged at the upper portion of the water retaining portion (620) in the width direction along the length direction of the surface layer (2), a second elastic structure (640) arranged at the middle portion of the water retaining portion (620) in the width direction along the length direction of the surface layer (2), and a third elastic structure (650) arranged at the lower portion of the water retaining portion (620) in the width direction along the length direction of the surface layer (2). The water retaining structure (6) is used to prevent liquid from overflowing to both sides.

2. A leak-proof sanitary napkin according to claim 1, characterized in that: The elastic contraction force of the first elastic structure (630) is greater than the elastic contraction force of the second elastic structure (640).

3. The leak-proof sanitary napkin according to claim 1, characterized in that: The first elastic structure (630) is arranged between the top of the water retaining portion (620) and one-third below the top, the second elastic structure (640) is arranged between one-third and two-thirds below the top of the water retaining portion (620), and the third elastic structure (650) is arranged between the bottom of the water retaining portion (620) and one-third above the bottom.

4. The leak-proof sanitary napkin according to claim 3, characterized in that: The first elastic structure (630) includes a first elastic line (631) and a second elastic line (632) arranged in parallel, the first elastic line (631) is arranged at the top of the water retaining portion (620), and the second elastic line (632) is arranged at one-sixth of the distance from the top of the water retaining portion (620). The second elastic structure (640) includes a third elastic line (641) parallel to the first elastic structure (630), and the third elastic line (641) is arranged at one-third of the distance from the top of the water retaining portion (620). The third elastic structure (650) includes a fourth elastic line (651) parallel to the first elastic structure (630), and the fourth elastic line (651) is arranged at one-sixth of the distance from the bottom of the water retaining portion (620).

5. The leak-proof sanitary napkin according to claim 1, characterized in that: The fixing portion (610) comprises a first pressing portion (660) arranged on the upper portion of the surface layer (2) and a second pressing portion (670) arranged on the lower portion of the surface layer (2), wherein the pressing length of the first pressing portion (660) is less than or equal to the pressing length of the second pressing portion (670).

6. The leak-proof sanitary napkin according to claim 5, characterized in that: The pressing length of the first pressing portion (660) ranges from 5 to 12 cm, and the pressing length of the second pressing portion (670) ranges from 8 to 15 cm.

7. The leak-proof sanitary napkin according to claim 1, characterized in that: The first absorbent structure (410) is wrapped around or embedded in the second absorbent structure (420).

8. The leak-proof sanitary napkin according to claim 1, characterized in that: The first drainage structure (210) has an arc shape at the top and an opening shape at the bottom; The third drainage structure (230) has an upper portion with an opening shape and a lower portion with an arc shape; The upper portion of the second drainage structure (220) is an opening shape having a width smaller than that of the lower portion of the first drainage structure (210), and the lower portion of the second drainage structure (220) is an opening shape having a width smaller than that of the upper portion of the third drainage structure (230). Both sides of the second drainage structure (220) are respectively inserted into the first drainage structure (210) and the third drainage structure (230); The fourth drainage structure (240) has an upper portion with an opening shape and a lower portion with an arc structure.

9. The leak-proof sanitary napkin according to claim 1, characterized in that: Also includes: Two side waterproof structures (7) are arranged between the surface layer (2) and the waterproof bottom layer (5), and the two side waterproof structures (7) each include a third pressing portion (710) connected to the surface layer (2) and a fourth pressing portion (720) connected to the waterproof bottom layer (5).

10. The leak-proof sanitary napkin according to claim 1, characterized in that: The surface layer (2) has concave diamond-shaped patterns, and a guide hole (250) is provided at each intersection of the diamond-shaped patterns.

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