Telescopic sanitary towel

Abstract

The utility model discloses a telescopic sanitary towel. The sanitary towel comprises a main body used for absorbing menstruation liquid, a leakage-proof partition edge is arranged on the periphery of the main body, the main body comprises a surface layer, a flow guide layer, a core body and a breathable bottom film which are sequentially arranged from top to bottom, the core body comprises a first core body layer and a second core body layer, and the end, away from the second core body layer, of the first core body layer is fixedly connected with the breathable bottom film. The end, away from the first core body layer, of the second core body layer is fixedly connected with the breathable bottom film, and when the sanitary towel is stretched in the length direction of the core body, the first core body layer and the second core body layer move in opposite directions. The sanitary napkin has the telescopic performance, the telescopic structure of the sanitary napkin is arranged in the core body and does not rub with the skin of a user, and the wearing comfort is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary napkins, and more particularly to a retractable sanitary napkin. Background Art

[0002] Sanitary napkins are absorbent materials primarily made of cotton, nonwoven fabric, pulp, or a combination of these materials, including polymers and polymer-coated paper. They are structurally divided into a top layer, a drainage layer, a core, and a backing layer. They are typically fixed in size and cannot be adjusted in length. This means that if a sanitary napkin doesn't fit you properly, you'll have to discard it or push it back, which is quite inconvenient.

[0003] The prior art discloses a stretchable sanitary napkin, comprising a sanitary napkin body, wherein the sanitary napkin body comprises a surface layer, an absorbent core and a bottom layer. The sanitary napkin body is provided with a stretchable extension along the length direction, wherein the fold of the extension is perpendicular to the length direction of the sanitary napkin, and the extension passes through the bottom layer, the surface layer and the absorbent core in sequence in the width direction of the sanitary napkin. The extension is provided at both ends of the absorbent core. The inner layer formed by the extension is provided with a sticky material for adhering the fold marks. However, the above-mentioned stretchable extension is provided at both ends of the sanitary napkin, and the core part of the sanitary napkin cannot achieve a stretchable effect. In addition, the stretchable extension has fold marks and is provided on the surface of the sanitary napkin, which will rub against the user's skin, reducing the user's experience. Summary of the Invention

[0004] In view of the above-mentioned existing technical problems, the present invention provides a stretchable sanitary napkin, which can achieve better stretching and retracting effects.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A retractable sanitary napkin comprises a main body for absorbing menstrual fluid, wherein the main body is provided with leak-proof partition edges around the main body, wherein the main body comprises a surface layer, a guide layer, a core body, and a breathable bottom film arranged in sequence from top to bottom, wherein the core body comprises a first core layer and a second core layer, wherein one end of the first core layer away from the second core layer is fixedly connected to the breathable bottom film, and one end of the second core layer away from the first core layer is fixedly connected to the breathable bottom film, and when the sanitary napkin is stretched along the length direction of the core body, the first core layer and the second core layer move in opposite directions.

[0007] The utility model provides a retractable sanitary napkin, wherein a first core layer and a second core layer are provided in a core portion, wherein one end of the first core layer away from the second core layer is fixedly connected to a breathable base film, while the other end is not connected to the breathable base film; one end of the second core layer away from the first core layer is fixedly connected to the breathable base film, while the other end is not connected to the breathable base film. When the sanitary napkin is stretched along its length, the breathable base film stretches along the length of the core, while the first core layer and the second core layer, one end of which is fixedly connected to the breathable base film, stretch along the length of the breathable base film, thereby achieving the retractable function of the sanitary napkin.

[0008] Furthermore, the first core layer and the second core layer are in contact with each other, and the second core layer (5) and the first core layer (4) are arranged in sequence from top to bottom. More specifically, the first core layer and the second core layer overlap in the vertical direction. In the present invention, the first core layer and the second core layer are arranged in contact with each other and overlap in the vertical direction, which not only achieves a retractable effect, but also the overlapping portion can further improve the absorption of blood and avoid leakage.

[0009] Furthermore, the first core layer is a composite core layer, and the second core layer is a fluff pulp layer. The fluff pulp layer contains fluff pulp, and the composite core layer comprises dust-free paper, super absorbent resin, fluffy non-woven fabric, super absorbent resin, and dust-free paper from top to bottom. The super absorbent resin can be a super absorbent resin conventionally used in the art, such as Sandaya 930, Sumitomo 60S, etc. Both the fluff pulp and the super absorbent resin layer have strong absorption capacity. At the same time, the fluff pulp structure of the upper layer is relatively loose, which can effectively allow blood to penetrate downward while keeping the product soft. The high absorbency and water retention of the super absorbent resin in the composite core layer reduce the amount of blood back-seepage and improve the dryness of the product.

[0010] Furthermore, the surfaces of the first core layer and the second core layer are provided with a plurality of V-shaped grooves along the length direction of the core. The present invention provides a plurality of V-shaped grooves on the surfaces of the first core layer and the second core layer along the length direction of the core. When the sanitary napkin is stretched along its length, the design of the V-shaped grooves will cause the core layer to follow the stretching in the length direction of the sanitary napkin, further improving the retractable effect. In addition, the grooving may have a certain impact on the absorption of liquid by the core, and the design of the V-shaped groove of the present application is compared with other grooves (such as transverse rectangular grooves, etc.). During the stretching and retracting process, the shape of the V-shaped groove after stretching is more conducive to the absorption of liquid, and can reduce the impact on the core structure to a smaller extent, thereby avoiding affecting the absorption of liquid.

[0011] Furthermore, the number of the V-shaped grooves is 3 to 10. If there are too many V-shaped grooves, the blood flowing through the core layer will quickly flow directly to the lower layer and cannot achieve good absorption; and if there are too few V-shaped grooves, the stretching effect is not significant.

[0012] Furthermore, the leak-proof edge is formed by hot-pressing a composite of an elastic non-woven fabric, a PTFE membrane, and the elastic non-woven fabric. Existing sanitary napkins achieve stretchability by using stretchable bands or rubber bands on the edge, but the edge layer alone lacks stretchability. The present invention utilizes an elastic non-woven fabric that provides a stretchable effect. A layer of PTF membrane is heat-pressed between the elastic non-woven fabrics. The PTFE membrane exhibits excellent stretchability, enabling expansion and contraction in conjunction with the edge and core. Furthermore, due to the inherent properties of the PTFE material, it exhibits excellent air permeability and water resistance, achieving superior waterproof and breathable properties.

[0013] Furthermore, the PTFE membrane provided by the present invention can be a PTFE membrane conventionally used in the art. More specifically, the PTFE membrane can also be prepared by the following method:

[0014] (1) extruding and granulating the PTFE resin to prepare film particles;

[0015] (2) the film layer particles in step (1) are extruded through a casting extruder to form a film blank;

[0016] (3) The film blank in step (2) is longitudinally stretched, and the longitudinal stretching temperature is controlled to be 200-250°C, and the longitudinal stretching ratio is 5-10:1; then it is transversely stretched, and the transverse stretching temperature is controlled to be 130-200°C, and the transverse stretching ratio is 25-40:1; after stretching, it is heat-set to obtain a PTFE membrane.

[0017] Specifically, in step (1), the temperature of extrusion granulation is 200-250°C.

[0018] Specifically, in the step (2), the film is extruded through a casting extruder at 160-180°C.

[0019] Specifically, in the step (3), heat setting treatment is performed at 250-280°C.

[0020] Furthermore, the elastic nonwoven fabric is a perforated elastic nonwoven fabric surface layer. The perforations in the elastic nonwoven fabric can, on the one hand, improve the stretchability of the septum so that it can adapt to the stretching of the core; on the other hand, it can also allow blood to seep through quickly to keep the surface layer dry, further improving wearing comfort.

[0021] Furthermore, the surface layer is provided with a plurality of guide grooves, which extend downward from the surface layer to the core body. The guide grooves play a guiding role, and can quickly guide the menstrual fluid in the surface layer to the inside of the core body, further improving the ability of rapid absorption.

[0022] Furthermore, the width of the guide groove is 0.5 to 2 mm.

[0023] Furthermore, the surface layer is an elastic non-woven fabric; the guide layer is a PE perforated film; and the breathable bottom film is a cast POE film or a PTFE film.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The utility model provides a retractable sanitary napkin. By setting a retractable structure of the core body, the main body and the partition edge of the sanitary napkin have good retractable performance. The retractable structure is arranged inside the core body and will not rub against the user's skin, thereby improving wearing comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the internal structure of a retractable sanitary napkin.

[0027] Figure 2 Schematic diagram of the structure of the first core layer.

[0028] Figure 3 A cross-sectional view of the leak-proof partition.

[0029] In the figure, 1. leak-proof partition; 11. elastic non-woven fabric; 12. PTFE membrane; 2. surface layer; 3. guide layer; 4. first core layer; 5. second core layer; 6. breathable bottom membrane; 7. V-shaped groove. DETAILED DESCRIPTION

[0030] The following embodiments are for illustrative purposes only and are not to be construed as limiting the present invention. To better illustrate the present embodiments, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of the actual product. It is understood by those skilled in the art that certain well-known structures and their descriptions may be omitted from the accompanying drawings. The positional relationships depicted in the accompanying drawings are for illustrative purposes only and are not to be construed as limiting the present invention.

[0031] When describing the embodiments of the invention, terms such as "length", "width", "thickness", "height", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" indicating orientation and positional relationships are based on the orientation or positional relationships shown in the relevant 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 orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0032] Example 1 A retractable sanitary napkin

[0033] like Figures 1 to 3 As shown, a stretchable sanitary napkin includes a main body for absorbing menstrual fluid, and leak-proof partitions 2 are arranged around the main body. The main body includes a surface layer 2, a guide layer 3, a core body, and a breathable bottom film 6 arranged in sequence from top to bottom. The core body includes a first core layer 4 and a second core layer 5. The end of the first core layer 4 away from the second core layer 5 is fixedly connected to the breathable bottom film 6, and the end of the second core layer 5 away from the first core layer 4 is fixedly connected to the breathable bottom film 6. When the sanitary napkin is stretched along the length direction of the core body, the first core layer 4 and the second core layer 5 move in opposite directions.

[0034] In this embodiment, the surface layer 2 is an elastic non-woven fabric; the guide layer 3 is a PE perforated film; and the breathable bottom film 6 is a PTFE film.

[0035] In this embodiment, the first core layer 4 and the second core layer 5 are in contact with each other, and the second core layer 5 and the first core layer 4 are arranged in order from top to bottom. More specifically, the first core layer 4 and the second core layer 5 overlap in the vertical direction, which not only achieves a stretchable effect, but also the overlapping portion can further improve blood absorption and prevent leakage.

[0036] In this embodiment, the first core layer 4 is a composite core layer, and the second core layer 5 is a fluff pulp layer.

[0037] In this embodiment, the surfaces of the first core layer 4 and the second core layer 5 are provided with five V-shaped grooves 7 along the length direction of the core. When the sanitary napkin is stretched along its length, the design of the V-shaped grooves 7 will cause the core layer to follow the stretching in the length direction of the sanitary napkin, further improving the retractable effect. In addition, the grooves in the core may have a certain impact on the core's absorption of liquid. Compared with other grooves (such as transverse rectangular grooves, etc.), the design of the V-shaped grooves 7 of the present application is more conducive to the absorption of liquid during the stretching and retraction process after stretching, and can reduce the impact on the core structure to a smaller extent, thereby avoiding affecting the absorption of liquid.

[0038] In this embodiment, the leak-proof barrier 1 is formed by hot-pressing an elastic nonwoven fabric 11, a PTFE membrane 12, and the elastic nonwoven fabric 11. The PTFE membrane 12 is hot-pressed between the elastic nonwoven fabric 11. The PTFE membrane exhibits excellent stretchability, allowing it to expand and contract with the barrier and core. Furthermore, due to its inherent properties, the PTFE material exhibits excellent air permeability and water resistance, achieving excellent waterproof and breathable properties.

[0039] Example 2 A retractable sanitary napkin

[0040] like Figures 1 to 3As shown, a stretchable sanitary napkin includes a main body for absorbing menstrual fluid, and leak-proof partitions 2 are arranged around the main body. The main body includes a surface layer 2, a guide layer 3, a core body, and a breathable bottom film 6 arranged in sequence from top to bottom. The core body includes a first core layer 4 and a second core layer 5. The end of the first core layer 4 away from the second core layer 5 is fixedly connected to the breathable bottom film 6, and the end of the second core layer 5 away from the first core layer 4 is fixedly connected to the breathable bottom film 6. When the sanitary napkin is stretched along the length direction of the core body, the first core layer 4 and the second core layer 5 move in opposite directions.

[0041] In this embodiment, the surface layer 2 is an elastic non-woven fabric; the guide layer 3 is a PE perforated film; and the breathable bottom film 6 is a cast POE film.

[0042] In this embodiment, the first core layer 4 and the second core layer 5 are in contact with each other, and the second core layer 5 and the first core layer 4 are arranged in order from top to bottom. More specifically, the first core layer 4 and the second core layer 5 overlap in the vertical direction, which not only achieves a stretchable effect, but also the overlapping portion can further improve blood absorption and prevent leakage.

[0043] In this embodiment, the first core layer 4 is a composite core layer, and the second core layer 5 is a fluff pulp layer.

[0044] In this embodiment, the surfaces of the first core layer 4 and the second core layer 5 are provided with six V-shaped grooves 7 along the length direction of the core. When the sanitary napkin is stretched along its length, the design of the V-shaped grooves 7 will cause the core layer to follow the stretching in the length direction of the sanitary napkin, further improving the retractable effect. In addition, the grooves in the core may have a certain impact on the core's absorption of liquid. Compared with other grooves (such as transverse rectangular grooves, etc.), the design of the V-shaped grooves 7 of the present application is more conducive to the absorption of liquid during the stretching and retraction process after stretching, and can reduce the impact on the core structure to a smaller extent, thereby avoiding affecting the absorption of liquid.

[0045] In this embodiment, the leak-proof barrier 1 is formed by hot-pressing an elastic nonwoven fabric 11, a PTFE membrane 12, and the elastic nonwoven fabric 11. The PTFE membrane 12 is hot-pressed between the elastic nonwoven fabric 11. The PTFE membrane exhibits excellent stretchability, allowing it to expand and contract with the barrier and core. Furthermore, due to its inherent properties, the PTFE material exhibits excellent air permeability and water resistance, achieving excellent waterproof and breathable properties.

[0046] In this embodiment, the elastic nonwoven fabric 11 is a perforated elastic nonwoven fabric. The perforations in the elastic nonwoven fabric can improve the stretchability of the septum so that it can adapt to the stretchability of the core; on the other hand, it can also allow blood to seep through quickly to keep the surface layer dry, further improving wearing comfort.

[0047] Example 3: A retractable sanitary napkin

[0048] like Figures 1 to 3 As shown, a stretchable sanitary napkin includes a main body for absorbing menstrual fluid, and leak-proof partitions 2 are arranged around the main body. The main body includes a surface layer 2, a guide layer 3, a core body, and a breathable bottom film 6 arranged in sequence from top to bottom. The core body includes a first core layer 4 and a second core layer 5. The end of the first core layer 4 away from the second core layer 5 is fixedly connected to the breathable bottom film 6, and the end of the second core layer 5 away from the first core layer 4 is fixedly connected to the breathable bottom film 6. When the sanitary napkin is stretched along the length direction of the core body, the first core layer 4 and the second core layer 5 move in opposite directions.

[0049] In this embodiment, the surface layer 2 is an elastic non-woven fabric; the guide layer 3 is a PE perforated film; and the breathable bottom film 6 is a PTFE film.

[0050] In this embodiment, the first core layer 4 and the second core layer 5 are in contact with each other, and the second core layer 5 and the first core layer 4 are arranged in order from top to bottom. More specifically, the first core layer 4 and the second core layer 5 overlap in the vertical direction, which not only achieves a stretchable effect, but also the overlapping portion can further improve blood absorption and prevent leakage.

[0051] In this embodiment, the first core layer 4 is a composite core layer, and the second core layer 5 is a fluff pulp layer.

[0052] In this embodiment, eight V-shaped grooves 7 are provided on the surfaces of the first core layer 4 and the second core layer 5 along the length direction of the core. When the sanitary napkin is stretched along its length, the design of the V-shaped grooves 7 causes the core layer to follow the stretching in the length direction of the sanitary napkin, further improving the retractable effect. In addition, the grooves in the core may have a certain impact on the core's absorption of liquid. Compared with other grooves (such as transverse rectangular grooves, etc.), the design of the V-shaped grooves 7 of the present application is more conducive to the absorption of liquid during the stretching and retraction process after stretching, and can reduce the impact on the core structure to a smaller extent, thereby avoiding affecting the absorption of liquid.

[0053] In this embodiment, the leak-proof barrier 1 is formed by hot-pressing an elastic nonwoven fabric 11, a PTFE membrane 12, and the elastic nonwoven fabric 11. The PTFE membrane 12 is hot-pressed between the elastic nonwoven fabric 11. The PTFE membrane exhibits excellent stretchability, allowing it to expand and contract with the barrier and core. Furthermore, due to its inherent properties, the PTFE material exhibits excellent air permeability and water resistance, achieving excellent waterproof and breathable properties.

[0054] In this embodiment, the elastic nonwoven fabric 11 is a perforated elastic nonwoven fabric. The perforations in the elastic nonwoven fabric 11 not only improve the stretchability of the septum, allowing it to adapt to the stretchability of the core, but also allow blood to quickly seep through, keeping the surface layer dry and further improving wearing comfort.

[0055] In this embodiment, the surface layer 2 is provided with several 1.5mm wide guide grooves extending from the surface layer downward to the core body. The guide grooves play a guiding role, which can quickly guide the menstrual fluid in the surface layer 2 into the core body, further improving the ability of rapid absorption.

[0056] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art will readily appreciate that other variations or modifications can be made based on the above descriptions and ideas. It is not necessary and impossible to provide an exhaustive list of all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A retractable sanitary napkin comprising a main body for absorbing menstrual fluid, wherein the main body is provided with leak-proof edges (1) around the periphery thereof, characterized in that: The main body comprises a surface layer (2), a guide layer (3), a core body, and a breathable bottom film (6) arranged in sequence from top to bottom; the core body comprises a first core layer (4) and a second core layer (5); an end of the first core layer (4) away from the second core layer (5) is fixedly connected to the breathable bottom film (6); an end of the second core layer (5) away from the first core layer (4) is fixedly connected to the breathable bottom film (6); when the sanitary napkin is stretched along the length direction of the core body, the first core layer (4) and the second core layer (5) move in opposite directions.

2. The retractable sanitary napkin according to claim 1, characterized in that: The first core layer (4) and the second core layer (5) are in contact with each other, and the second core layer (5) and the first core layer (4) are arranged in sequence from top to bottom.

3. The retractable sanitary napkin according to claim 1, characterized in that: The first core layer (4) is a composite core layer, and the second core layer (5) is a fluff pulp layer.

4. The retractable sanitary napkin according to claim 1, characterized in that: The surfaces of the first core layer (4) and the second core layer (5) are provided with a plurality of V-shaped grooves (7) along the length direction of the core.

5. The retractable sanitary napkin according to claim 4, characterized in that: The V-shaped grooves (7) are provided with 3 to 10 in number.

6. The stretchable sanitary napkin according to claim 1, characterized in that: The leak-proof partition (1) is formed by hot-pressing a composite of an elastic non-woven fabric (11), a PTFE membrane (12) and the elastic non-woven fabric (11).

7. The stretchable sanitary napkin according to claim 6, characterized in that: The elastic non-woven fabric (11) is a perforated elastic non-woven fabric.

8. The stretchable sanitary napkin according to claim 1, characterized in that: A plurality of guide grooves are provided on the surface layer (2), and the guide grooves extend downward from the surface layer (2) to the core body.

9. The stretchable sanitary napkin according to claim 8, characterized in that: The width of the guide groove is 0.5-2 mm.

10. The stretchable sanitary napkin according to claim 1, characterized in that: The surface layer (2) is an elastic non-woven fabric (11); the guide layer (3) is a PE perforated film; and the breathable bottom film (6) is a cast POE film or a PTFE film.

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