Rapid absorption core body

Abstract

The utility model discloses a rapid absorption core, and belongs to the field of absorption cores. A rapid absorption core comprises an absorber and a flow guide body, the absorber comprises first non-woven fabric, a wood pulp fiber layer and second non-woven fabric which are sequentially arranged, the flow guide body comprises a first fiber layer, a second fiber layer and dry paper which are sequentially arranged, and the dry paper is arranged on one side of the first non-woven fabric. The gram weight of the second fiber layer is larger than that of the first fiber layer. The liquid absorption device has the advantages of accelerating liquid absorption and improving the use experience.

Description

Technical Field

[0001] The present application relates to the field of absorbent cores, and in particular to a fast-absorbing core. Background Art

[0002] The absorbent core needs to have both the functions of absorbing and storing liquid. For absorbent cores with different uses, the functions emphasized by the absorbent core will also be different. Taking women's menstrual products as an example, because the amount of menstrual blood is less than that of urine, the absorbent core used in women's menstrual products pays more attention to the function of absorbing liquid. One of the evaluation indicators of the liquid absorption function is the speed of liquid absorption.

[0003] To this end, the absorbent core is provided with a guide layer, which is arranged on one side of the absorbent layer. The function of the guide layer is to quickly pass the liquid through and transfer it to the absorbent layer, and the liquid is then absorbed and stored by the absorbent layer. However, in the case of heavy menstrual blood flow, there is still a situation where the absorbent layer cannot absorb the liquid in time, resulting in a longer skin contact time with the liquid, affecting the absorption effect and user experience. Utility Model Content

[0004] In order to speed up liquid absorption and improve the user experience, the present application provides a fast-absorbing core.

[0005] The fast-absorbing core provided in the present application adopts the following technical solution:

[0006] A fast-absorbing core comprises an absorbent body and a flow conductor, wherein the absorbent body comprises a first nonwoven fabric, a wood pulp fiber layer and a second nonwoven fabric arranged in sequence, and the flow conductor comprises a first fiber layer, a second fiber layer and air-laid paper arranged in sequence, wherein the air-laid paper is arranged on one side of the first nonwoven fabric, and the gram weight of the second fiber layer is greater than the gram weight of the first fiber layer.

[0007] By adopting the above technical scheme, the absorbent body uses the wood pulp fiber layer as the main body. The advantage of the wood pulp fiber layer is that it has high absorbency and is suitable for the characteristics of small menstrual blood discharge. Therefore, the absorbent body is suitable for female menstrual products; the menstrual blood enters the absorbent body after passing through the first fiber layer, the second fiber layer and the dry-laid paper in sequence, and the different gram weights of the second fiber layer and the first fiber layer are controlled to allow more and faster liquid to pass through the body-conducting body. Specifically, the gram weight of the first fiber layer is small, and the internal structure is more fluffy. The downward permeability of the liquid in the first fiber layer is good, so that the liquid reaches the second fiber layer faster and leaves the skin. The gram weight of the second fiber layer is large, and the internal structure is denser. The liquid is less likely to penetrate downward in the second fiber layer and is more likely to diffuse in a plane, thereby forming a difference in the speed of penetration and diffusion in the body-conducting body, realizing directional and asymmetric transmission of the liquid, and accelerating the flow of liquid. The dry-laid paper absorbs the liquid and conducts it to the first non-woven fabric, accelerating the absorption of the liquid by the wood pulp fiber layer, so that it can cope with scenes with large flow rates and improve the user experience.

[0008] Optionally, the ratio of the gram weight of the second fiber layer to the gram weight of the first fiber layer is (1.15~1.5):1.

[0009] By adopting the above technical solution, the difference in gram weight between the first fiber layer and the second fiber layer falls within the above range, which can form a more reasonable penetration and diffusion speed difference in the flow-conducting body, thereby accelerating the flow of liquid.

[0010] Optionally, the second fiber layer has a gram weight of 20-30 gsm.

[0011] By adopting the above technical solution, the grammage of the second fiber layer falls within the above range, which is also beneficial to controlling the diffusion of liquid in the second fiber layer.

[0012] Optionally, the ratio of the diffusion area of ​​the second fiber layer to the diffusion area of ​​the first fiber layer is (2~2.7):1.

[0013] By adopting the above technical solution, the difference in diffusion area between the first fiber layer and the second fiber layer falls within the above range, which can not only allow the liquid to quickly move away from the skin, but also allow the liquid to quickly diffuse on the plane, thereby accelerating the liquid to reach the absorbent.

[0014] Optionally, the diffusion area of ​​the second fiber layer is 1.9-3 cm 2 .

[0015] By adopting the above technical solution, the diffusion area of ​​the second fiber layer falls within the above range, which is beneficial to maintaining the stability of the flow-guiding body structure while obtaining a better diffusion speed.

[0016] Optionally, the ratio of the thickness of the second fiber layer to the thickness of the first fiber layer is (0.45~0.75):1.

[0017] By adopting the above technical solution, the thickness difference between the first fiber layer and the second fiber layer is controlled, a suitable space is reserved for the penetration and diffusion of liquid, and the structural stability of the body guide is improved.

[0018] Optionally, the second fiber layer and the first fiber layer are both formed by hot-air combing of chemical fibers.

[0019] By adopting the above technical solution, the first fiber layer and the second fiber layer combed by hot air can have the advantages of good softness and easy deformation, so that the side of the fluid guide body close to the skin can provide a good touch, further improving the use experience.

[0020] Optionally, an adhesive layer is provided between the air-laid paper and the first non-woven fabric.

[0021] By adopting the above technical solution, the adhesive layer can enhance the connection stability between the fluid guide and the absorbent body. At the same time, the provision of the adhesive layer can increase the hardness of the absorbent core, so that the hardness of the absorbent core can be adjusted by controlling the thickness of the adhesive layer to adapt to different usage scenarios.

[0022] In summary, this application has the following beneficial effects:

[0023] 1. The present application controls the different gram weights of the second fiber layer and the first fiber layer, so that more and faster liquid can pass through the body-conducting device. Specifically, the gram weight of the first fiber layer is small, and the internal structure is more fluffy. The downward permeability of the liquid in the first fiber layer is good, so that the liquid reaches the second fiber layer faster and leaves the skin. The gram weight of the second fiber layer is large, and the internal structure is denser. The liquid is less likely to penetrate downward in the second fiber layer and is more likely to diffuse in the plane, thereby forming a speed difference between penetration and diffusion in the body-conducting device, realizing directional and asymmetric transmission of the liquid, and accelerating the flow of the liquid. The dry-laid paper absorbs the liquid and conducts it to the first nonwoven fabric, accelerating the absorption of the liquid by the wood pulp fiber layer, so that it can cope with scenes with large flow rates and improve the user experience.

[0024] 2. Control the diffusion area and thickness of the first fiber layer and the second fiber layer, balance and achieve a good penetration rate and diffusion rate, accelerate the flow of liquid into the absorbent, and improve the absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a planar structural diagram of the absorbent core of an embodiment of the present application.

[0026] Figure 2 This is a planar structural diagram of the absorbent core of other embodiments of the present application.

[0027] Description of reference numerals:

[0028] 1. absorbent body; 11. first nonwoven fabric; 12. second nonwoven fabric; 13. wood pulp fiber layer; 2. flow conductor; 21. first fiber layer; 22. second fiber layer; 23. dry-laid paper; 3. adhesive layer. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2 This application is described in further detail.

[0030] The present application embodiment discloses a fast absorbing core. Figure 1 As shown, a fast-absorbing core comprises an absorbent body 1 and a flow guide 2. The flow guide 2 is located on a side close to the skin. Liquid first passes through the flow guide 2 and then enters the absorbent body 1 to be absorbed.

[0031] The absorbent body 1 includes a first nonwoven fabric 11, a wood pulp fiber layer 13, and a second nonwoven fabric 12, which are arranged in sequence. The first nonwoven fabric 11 is arranged on the side close to the body guide 2. Generally speaking, women discharge menstrual blood quickly, but the amount of discharge is not large. Therefore, the absorbent body 1 is mainly composed of the wood pulp fiber layer 13. The liquid storage capacity of wood pulp fiber is average, but the advantage of wood pulp fiber is that it has high absorbency and can meet the requirement of rapid absorption of menstrual blood. In addition, the wood pulp fiber is light in weight, making the absorbent body 1 suitable for use in women's menstrual products.

[0032] The flow guide 2 includes a first fiber layer 21 , a second fiber layer 22 and an air-laid paper 23 arranged in sequence. The first fiber layer 21 is located on the side close to the skin, and the air-laid paper 23 is heat-sealed to one side of the first nonwoven fabric 11 .

[0033] In the past, when absorbing and conducting liquid, if the liquid flow rate is large, the liquid is easily congested in a part of the body guide 2, and the subsequent liquid is blocked and difficult to continue to enter the first fiber layer 21, resulting in a longer contact time between the liquid and the skin, affecting the experience.

[0034] To this end, the gram weight of the second fiber layer 22 is set to be greater than the gram weight of the first fiber layer 21, and the ratio of the gram weight of the second fiber layer 22 to the gram weight of the first fiber layer 21 is (1.15~1.5):1, and the gram weight of the second fiber layer 22 is 20~30gsm. Specifically, in this embodiment, the gram weight of the second fiber layer 22 is 20gsm, and the gram weight of the first fiber layer 21 is 17.4gsm. In other embodiments, the gram weight of the second fiber layer 22 is 30gsm, and the gram weight of the first fiber layer 21 is 20gsm, so that the internal structure of the first fiber layer 21 is relatively fluffy, and the internal structure of the second fiber layer 22 is relatively dense. The first fiber layer 21 and the second fiber layer 22 are both formed by hot air combing of chemical fibers, and the chemical fibers can be ES fibers.

[0035] When the liquid passes through the body-conducting device 2, the liquid first enters the first fiber layer 21. The fluffy first fiber layer 21 makes the liquid permeable downward, so that the liquid reaches the second fiber layer 22 faster and leaves the skin. The dense second fiber layer 22 makes it difficult for the liquid to penetrate downward and easier to diffuse on the plane, thereby forming a speed difference between penetration and diffusion in the body-conducting device 2, realizing directional and asymmetric transmission of the liquid, which can accelerate the flow of the liquid. The absorption area utilization rate of the body-conducting device 2 is increased, and the time the liquid stays on the surface of the first fiber layer 21 is reduced, so that the liquid reaches the absorbent 1 faster, thereby being able to cope with scenes with large flow rates and improving the user experience.

[0036] Furthermore, the ratio of the diffusion area of ​​the second fiber layer 22 to the diffusion area of ​​the first fiber layer 21 is (2-2.7):1, and the diffusion area of ​​the second fiber layer 22 is 1.9-3 cm 2The diffusion area refers to the area of ​​the water drop trace formed after 0.1 mL of water is dropped onto the surface of the fiber layer and diffused for 30 seconds. Specifically, in this embodiment, the diffusion area of ​​the second fiber layer 22 is 1.9 cm 2 , the diffusion area of ​​the first fiber layer 21 is 0.95 cm 2 In other embodiments, the diffusion area of ​​the second fiber layer 22 is 3 cm 2 , the diffusion area of ​​the first fiber layer 21 is 1.11 cm 2 By setting the difference in diffusion area between the first fiber layer 21 and the second fiber layer 22 , the purpose of rapid liquid entry into the second fiber layer 22 and rapid liquid diffusion on the plane is achieved, further accelerating the liquid to reach the absorbent body 1 .

[0037] In addition, the first fiber layer 21 may use fibers with a relatively large diameter, and the second fiber layer 22 may use fibers with a relatively small diameter, so as to adjust a suitable gram weight and diffusion area.

[0038] The ratio of the thickness of the second fiber layer 22 to the thickness of the first fiber layer 21 is (0.45~0.75):1. Specifically, in this embodiment, the thickness of the second fiber layer 22 is 0.3 mm, and the thickness of the first fiber layer 21 is 0.4 mm. In other embodiments, the thickness of the second fiber layer 22 is 0.35 mm, and the thickness of the first fiber layer 21 is 0.77 mm.

[0039] The air-laid paper 23 is a composite material of chemical fiber and wood pulp fiber. The air-laid paper 23 is located between the second fiber layer 22 and the first nonwoven fabric 11. The air-laid paper 23 can absorb liquid and conduct it to the first nonwoven fabric 11, thereby accelerating the absorption of liquid by the wood pulp fiber layer 13.

[0040] In other embodiments, Figure 2 As shown, an adhesive layer 3 is arranged between the dry paper 23 and the first non-woven fabric 11. The adhesive layer 3 can be formed by hot melt adhesive. The adhesive layer 3 can enhance the connection stability between the flow guide 2 and the absorbent body 1. At the same time, the setting of the adhesive layer 3 can increase the hardness of the absorbent core, so that the hardness of the absorbent core can be adjusted by controlling the thickness of the adhesive layer 3 to adapt to different usage scenarios.

[0041] The implementation principle of a fast-absorbing core in the embodiment of the present application is as follows:

[0042] The liquid first enters the first fiber layer 21 and penetrates quickly, then reaches the second fiber layer 22 and diffuses in the planar direction, leaving more space for subsequent liquid to enter the flow guide 2, and then the liquid reaches the dry paper 23 and reaches the absorbent 1 through the dry paper 23. The wood pulp fiber layer 13 has good absorbency for the liquid, thereby achieving rapid absorption of the liquid.

[0043] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present application.

Claims

1. A fast absorbing core, characterized in that: The invention comprises an absorbent body (1) and a flow conductor (2), wherein the absorbent body (1) comprises a first nonwoven fabric (11), a wood pulp fiber layer (13) and a second nonwoven fabric (12) which are arranged in sequence, and the flow conductor (2) comprises a first fiber layer (21), a second fiber layer (22) and air-laid paper (23) which are arranged in sequence, wherein the air-laid paper (23) is arranged on one side of the first nonwoven fabric (11), and the gram weight of the second fiber layer (22) is greater than the gram weight of the first fiber layer (21).

2. A fast-absorbing core according to claim 1, characterized in that: The ratio of the gram weight of the second fiber layer (22) to the gram weight of the first fiber layer (21) is (1.15-1.5):

1.

3. A fast-absorbing core according to claim 2, characterized in that: The second fiber layer (22) has a gram weight of 20-30 gsm.

4. A fast-absorbing core according to claim 1, characterized in that: The ratio of the diffusion area of ​​the second fiber layer (22) to the diffusion area of ​​the first fiber layer (21) is (2-2.7):

1.

5. A fast-absorbing core according to claim 4, characterized in that: The diffusion area of ​​the second fiber layer (22) is 1.9-3 cm 2 .

6. A fast-absorbing core according to claim 1, characterized in that: The ratio of the thickness of the second fiber layer (22) to the thickness of the first fiber layer (21) is (0.45-0.75):

1.

7. A fast-absorbing core according to any one of claims 1 to 6, characterized in that: The second fiber layer (22) and the first fiber layer (21) are both formed by hot-air combing of chemical fibers.

8. A fast-absorbing core according to any one of claims 1 to 6, characterized in that: An adhesive layer (3) is provided between the air-laid paper (23) and the first non-woven fabric (11).

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