An ultra-thin non-inductive core

Abstract

The present invention relates to the technical field of sanitary products, and specifically discloses an ultra-thin non-sensitive core body, comprising an upper non-woven fabric and a lower non-woven fabric arranged above and below, the lower non-woven fabric is used to adhere to the bottom film of the sanitary absorbent product, and an intermediate layer that can pass water is fixedly connected between the upper non-woven fabric and the lower non-woven fabric, the intermediate layer is wavy, and the intermediate layer and the upper non-woven fabric and the lower non-woven fabric are formed with a plurality of receiving pits, the adjacent receiving pits are not connected to each other, and the receiving pits are filled with a polymer water-absorbing material. This scheme is used to solve the problem of poor air permeability and reduced comfort of sanitary absorbent products in the prior art due to the excessive thickness of the absorbent core body.

Description

Technical Field

[0001] The invention relates to the technical field of sanitary products, in particular to an ultra-thin non-inductive core body. Background Art

[0002] Existing sanitary absorbent products include sanitary napkins, diapers and pull-up pants. These sanitary products all include a base film, an absorbent core and a skin-friendly surface non-woven fabric. The surface non-woven fabric is in contact with human skin and can penetrate the liquid discharged by the human body (menstrual blood, urine or other excretions). The liquid discharged by the human body enters the absorbent core and is absorbed by the absorbent core. The base film can effectively prevent the liquid absorbed by the absorbent core from leaking out, and at the same time achieve a breathable effect.

[0003] The existing absorbent core includes two layers of non-woven fabrics, the upper and lower layers, and a polymer water-absorbent material in the middle of the non-woven fabrics. The polymer water-absorbent material is in granular form. In order to prevent the polymer water-absorbent material between the two layers of non-woven fabrics from moving, a fluffy fiber layer needs to be filled in the middle of the two layers of non-woven fabrics, and the polymer water-absorbent material is embedded in the fluffy fiber layer. In order to ensure that the polymer water-absorbent material is evenly distributed and has sufficient absorption capacity, the thickness of the fiber layer is much thicker than that of the non-woven fabric, resulting in a thicker entire absorbent core. When in use, the thickness of the entire sanitary absorbent product is also thicker. The thicker thickness of the sanitary absorbent product will bring about problems of poor air permeability and reduced comfort. Summary of the invention

[0004] The present invention aims to provide an ultra-thin non-sensitive core body to solve the problems of poor air permeability and reduced comfort of sanitary absorbent products in the prior art due to excessive thickness of the absorbent core body.

[0005] In order to achieve the above object, the basic scheme of the present invention is as follows:

[0006] The invention discloses an ultra-thin non-sensitive core body, comprising an upper non-woven fabric and a lower non-woven fabric arranged above and below, wherein the lower non-woven fabric is used to adhere closely to the bottom film of a sanitary absorbent product, and a middle layer which can pass through water is fixedly connected between the upper non-woven fabric and the lower non-woven fabric, wherein the middle layer is wavy in shape, and a plurality of receiving pits are formed between the middle layer, the upper non-woven fabric and the lower non-woven fabric, wherein adjacent receiving pits are not connected to each other, and the receiving pits are filled with a polymer water-absorbing material.

[0007] Compared with the prior art, the following are the beneficial effects:

[0008] In the present solution, a plurality of receiving pits are formed by the wavy middle layer and the upper non-woven fabric and the lower non-woven fabric. Only polymer water-absorbing materials are placed in the receiving pits. Since the receiving pits are not interconnected, the stability of the position of the polymer water-absorbing materials is ensured, and the clumping phenomenon caused by the displacement of the polymer water-absorbing materials during the use of the core is avoided. In addition, the present solution omits the fluffy fiber layer in the prior art and replaces it with a thin middle layer with water-permeable properties as a support. Therefore, when the same specification and quantity of polymer water-absorbing materials are filled, the core thickness of the present solution is thinner. After the core is used in a sanitary absorbent product, the air permeability and comfort are greatly improved, and the foreign body sensation caused by the presence of the sanitary absorbent product is also greatly reduced.

[0009] In this solution, in order to ensure that the receiving pits are not interconnected, the upper non-woven fabric is also wavy after being connected to the middle layer. The wavy upper non-woven fabric is beneficial to increase the contact area with the liquid discharged by the human body, thereby allowing the liquid to quickly penetrate into the receiving cavity and be quickly absorbed by the polymer water-absorbing material.

[0010] In addition, compared with the straight non-woven fabric, the wavy upper non-woven fabric forms a concave structure which can reduce the flow rate of the liquid, thereby reducing the diffusion rate of the liquid in the lateral direction of the sanitary absorbent product, thereby reducing the probability of side leakage.

[0011] Furthermore, a top layer of nonwoven fabric is fixedly connected above the upper nonwoven fabric, a cavity is formed between the top layer of nonwoven fabric and the upper layer of nonwoven fabric, a placement opening is opened on the top layer of nonwoven fabric, a detachable absorbent body is accommodated in the cavity, a polymer water-absorbing material is arranged in the absorbent body, and the absorbent body can be placed into the cavity through the placement opening.

[0012] Beneficial effects: When using existing sanitary absorbent products, taking diapers as an example, newborns under one month old generally urinate frequently, and need to change diapers every 2 hours, which means they need to be changed about 10 times a day. Even with such frequent changes, many newborns still have red buttocks. The reason for the red buttocks is that diapers are not changed after each urination, but sometimes they are changed after multiple urinations. Each urination needs to penetrate through the upper layer of the diaper before being absorbed, resulting in the upper layer close to the skin often not being dry, which in turn causes the occurrence of red buttocks. The existence of the replaceable absorbent in this solution allows adults to regularly replace the absorbent, ensure the dryness of the upper layer of the core, and reduce the probability of red buttocks in newborns. For sanitary napkins used by women, there is no need to replace the entire sanitary napkin, which reduces costs. In addition, after replacing the new absorbent, the absorption speed of the entire sanitary absorbent product is improved.

[0013] Furthermore, the placement port is located at the rear section of the core body, and the rear section of the core body is in contact with the buttocks of a human body.

[0014] Beneficial effect: When many sanitary absorbent products are in use, the middle part of the sanitary absorbent products often becomes saturated with absorption and leaks sideways. However, the rear part of the sanitary absorbent products is still in a clean state. Therefore, the rear part of the core is relatively clean. The placement port is set there so that the absorbent can be relatively cleaner when replaced.

[0015] Furthermore, at least two guide grooves are provided on the top layer of nonwoven fabric, the guide grooves are parallel to the length direction of the core body, and the absorbent body is located between the guide grooves.

[0016] Beneficial effect: The existence of the guide groove forms a guide for the liquid, so that when the core body cannot quickly allow the liquid to penetrate, the liquid can be quickly drained to the front and back of the core body through the guide groove, thereby accelerating the absorption of the liquid.

[0017] Furthermore, an elastic frame is provided at the bottom of the absorbent body, and the elastic frame facilitates the unfolding of the absorbent body.

[0018] Furthermore, the elastic frame includes at least two vertical frames, and the vertical frames can be clamped on the wavy upper non-woven fabric.

[0019] Beneficial effects: The vertical frame is arranged to facilitate inserting the absorbent body into the cavity from the placement opening, and the vertical frame can be stuck on the wavy upper non-woven fabric, so as to facilitate fixing the absorbent body in the cavity.

[0020] Furthermore, the elastic skeleton also includes at least two transverse skeletons, which are perpendicular to the vertical skeletons and can be stuck on the wavy upper non-woven fabric.

[0021] Beneficial effect: The transverse skeleton ensures that the absorbent body is horizontally expanded in the cavity, thereby preventing the absorbent body from rolling up in the cavity.

[0022] Furthermore, the upper non-woven fabric is made of spunlace non-woven fabric.

[0023] Beneficial effect: The spunlace nonwoven fabric has higher strength and better softness.

[0024] Furthermore, an elastic block is fixedly connected between the top layer non-woven fabric and the upper layer non-woven fabric. The height of the elastic block in a free state is higher than the height of the absorbent body. There are two elastic blocks, and the elastic blocks and the absorbent body are located on both sides of the guide groove.

[0025] Beneficial effect: The height of the elastic block in the free state is higher than the absorbent body, and a groove is formed between the two elastic blocks. Firstly, after the core body of the present scheme is bonded to the surface non-woven fabric of the sanitary absorbent product, the sanitary absorbent product also presents a groove, which is conducive to the accommodation of block objects contained in human excrement and avoids the discomfort caused by long-term compression and contact between the block objects and the human skin; secondly, the presence of the elastic block reduces the speed of liquid moving horizontally along the core body and reduces the probability of side leakage.

[0026] Furthermore, the elastic block is a water-absorbing sponge, and a water-repellent layer is provided on the top surface of the water-absorbing sponge close to human skin and the side surface away from the center of the core body.

[0027] Beneficial effects: The absorbent sponge can rebound quickly when there is no pressure, and can also absorb liquid that the absorbent body has no time to absorb. After the liquid is absorbed, the water-repellent layer (with waterproof properties) on the top surface and one of the side surfaces ensures that even if the liquid in the absorbent sponge is squeezed out again, it will not leak directly from the absorbent sponge, further reducing the probability of side leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A top view of the first embodiment of the present invention;

[0029] Figure 2 It is a front cross-sectional view of the first embodiment of the present invention;

[0030] Figure 3 It is an axonometric diagram of the middle layer in the first embodiment of the present invention;

[0031] Figure 4 It is a bottom view of the absorbent body in the first embodiment of the present invention;

[0032] Figure 5 It is a front cross-sectional view of the second embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The figure marks in the drawings of the specification include: top layer non-woven fabric 1, absorbent body 2, upper non-woven fabric 3, middle layer 4, lower non-woven fabric 5, cutting line 6, receiving pit 7, guide groove 8, absorbent cotton 9, vertical frame 10, transverse frame 11, elastic block 12, water-repellent layer 13.

[0035] Embodiment 1

[0036] Embodiment 1 is basically as shown in the attached Figures 1 to 4 As shown, the ultra-thin non-sensitive core body includes a top layer non-woven fabric 1, an absorbent body 2, an upper non-woven fabric 3, a middle layer 4 and a lower non-woven fabric 5 which are arranged in sequence from top to bottom. A cavity is formed between the top layer non-woven fabric 1 and the upper layer non-woven fabric. A cutting line 6 is processed on the top layer non-woven fabric 1 near the rear section of the core body (where the rear section of the core body is in contact with the buttocks of the human body). The cutting line 6 is opened to form a placement opening. A detachable absorbent body 2 is accommodated in the cavity. A polymer water-absorbing material is provided in the absorbent body 2. The absorbent body 2 can be placed into the cavity through the placement opening.

[0037] The top nonwoven fabric 1 is bonded to the edge of the upper nonwoven fabric 3, and the upper nonwoven fabric 3, the middle layer 4 and the lower nonwoven fabric 5 are bonded in sequence. The upper nonwoven fabric 3 and the lower nonwoven fabric 5 are both made of spunlace nonwoven fabrics, and the middle layer 4 is made of nonwoven fabric made of wood pulp.

[0038] The upper non-woven fabric 3, the middle layer 4 and the lower non-woven fabric 5 are all wavy, and the fluctuation amplitude of the middle layer 4 is much larger than the fluctuation amplitude of the upper non-woven fabric 3 and the lower non-woven fabric 5; the middle layer 4 and the upper non-woven fabric 3 and the lower non-woven fabric 5 are formed with a plurality of receiving pits 7, and the adjacent receiving pits 7 are not connected to each other, and the receiving pits 7 are filled with polymer water-absorbing material; the structure of the absorbent body 2 in this embodiment is the same as the structure formed by the upper non-woven fabric 3, the lower non-woven fabric 5 and the middle layer 4, so that the absorbent body 2 is thin and can achieve rapid absorption.

[0039] Two guide grooves 8 are processed on the top nonwoven fabric 1, and the guide grooves 8 are parallel to the length direction of the core. The absorbent body 2 is located between the guide grooves 8. The edge of the top nonwoven fabric 1 and the guide grooves 8 are filled with absorbent cotton 9 to enhance the absorption performance of the core.

[0040] An elastic frame is bonded to the bottom of the absorbent body 2, which facilitates the unfolding of the absorbent body 2. The elastic frame includes two vertical frames 10 and two transverse frames 11. Both the vertical frames 10 and the transverse frames 11 can be stuck on the wavy upper non-woven fabric 3. In this embodiment, the material of the elastic frame 10 can be made of PP plastic material or PE plastic material.

[0041] The specific implementation process is as follows:

[0042] In this embodiment, a plurality of receiving pits 7 are formed by the wavy middle layer 4 and the upper non-woven fabric 3 and the lower non-woven fabric 5. Only polymer water-absorbing materials are placed in the receiving pits 7. Since the receiving pits 7 are not interconnected, the stability of the position of the polymer water-absorbing materials is ensured, thereby avoiding the clumping phenomenon caused by the displacement of the polymer water-absorbing materials during the use of the core.

[0043] In this embodiment, the polymer water-absorbent material is fixed to a thin intermediate layer 4 having water-permeable properties. Therefore, when the core is filled with the same specification and amount of polymer water-absorbent material, the core of this embodiment is thinner. After the core is used in a sanitary absorbent product, the air permeability and comfort are greatly improved, and the foreign body sensation caused by the presence of the sanitary absorbent product is also greatly reduced.

[0044] In this embodiment, in order to ensure that the receiving pits 7 are not interconnected, the upper non-woven fabric 3 is also wavy after being connected to the middle layer 4. The wavy upper non-woven fabric 3 is beneficial to increase the contact area with the liquid discharged by the human body, thereby allowing the liquid to quickly penetrate into the receiving cavity and be quickly absorbed by the polymer water-absorbing material; in addition, the pit structure formed by the wavy upper non-woven fabric 3 can reduce the flow rate of the liquid, thereby reducing the diffusion rate of the liquid in the lateral direction of the sanitary absorbent product, so as to reduce the probability of side leakage.

[0045] In addition, a detachable absorbent body 2 is added in the present embodiment. The structure of the absorbent body 2 is the same as the lower structure of the core body, so it has high permeability and high absorption performance. Under the premise of this performance, the absorbent body 2 can be replaced with a new absorbent body 2 in time after it is saturated with absorption, so as to improve the dryness of the entire sanitary absorbent product. Replacing the absorbent body 2 in time instead of replacing the entire sanitary absorbent product is also conducive to reducing the cost of using sanitary absorbent products.

[0046] Embodiment 2

[0047] Embodiment 2 is basically as shown in the attached Figure 5 As shown, Example 2 makes the following improvements on the basis of Example 1: an elastic block 12 is bonded between the top layer of non-woven fabric 1 and the upper layer of non-woven fabric (the absorbent cotton 9 in Example 1 is changed to the elastic block 12), and the elastic block 12 adopts a water-absorbent sponge, wherein the top surface of the water-absorbent sponge and the side surface away from the middle of the core body are bonded with a water-repellent layer 13. In this embodiment, the water-repellent layer 13 can adopt a water-repellent non-woven fabric, such as a breathable and water-impermeable spunbond non-woven fabric; the height of the elastic block 12 in the free state is higher than the height of the absorbent body 2, the number of the elastic blocks 12 is two, the elastic blocks 12 and the absorbent body 2 are located on both sides of the guide groove 8, and a groove is formed between the two elastic blocks 12.

[0048] The specific implementation process is as follows:

[0049] A groove is formed between the two elastic blocks 12. Firstly, after the core of this embodiment is bonded to the surface non-woven fabric of the sanitary absorbent product, the sanitary absorbent product also presents a groove, which is conducive to the accommodation of block objects contained in human excrement (such as blood clots discharged together with menstrual blood) and avoids the discomfort caused by long-term compression and contact between block objects and human skin; secondly, the presence of the elastic block 12 reduces the speed of liquid moving laterally along the core, reducing the probability of side leakage; and the elastic block 12, as a water-absorbing sponge, can rebound quickly when there is no pressure, and can also absorb the liquid that the absorbent body 2 has no time to absorb. After the liquid is absorbed, the water-repellent layer 13 provided on the top surface and one of the side surfaces of the elastic block 12 ensures that even if the liquid in the elastic block 12 is squeezed out again, it will not directly leak out from the elastic block 12, further reducing the probability of side leakage.

[0050] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An ultra-thin non-sensitive core body, comprising an upper non-woven fabric and a lower non-woven fabric arranged above and below, wherein the lower non-woven fabric is used to adhere closely to the bottom film of a sanitary absorbent product, characterized in that: A water-permeable middle layer is fixedly connected between the upper non-woven fabric and the lower non-woven fabric. The middle layer is wavy. The middle layer, the upper non-woven fabric, and the lower non-woven fabric all form a plurality of receiving pits. Adjacent receiving pits are not connected to each other. The receiving pits are filled with a polymer water-absorbing material. A top layer of nonwoven fabric is fixedly connected to the upper nonwoven fabric, a cavity is formed between the top layer of nonwoven fabric and the upper layer of nonwoven fabric, a placement opening is provided on the top layer of nonwoven fabric, a detachable absorbent body is contained in the cavity, a polymer water-absorbing material is provided in the absorbent body, and the absorbent body can be placed in the cavity through the placement opening; an elastic frame is provided at the bottom of the absorbent body, and the elastic frame facilitates the unfolding of the absorbent body; The elastic skeleton includes at least two vertical skeletons, which can be stuck on the wavy upper non-woven fabric; the elastic skeleton also includes at least two transverse skeletons, which are perpendicular to the vertical skeletons and can be stuck on the wavy upper non-woven fabric; The placement port is located at the rear section of the core body, and the rear section of the core body is in contact with the buttocks of the human body; The top nonwoven fabric is provided with at least two guide grooves, the guide grooves are parallel to the length direction of the core body, and the absorbent body is located between the guide grooves; An elastic block is fixedly connected between the top layer of non-woven fabric and the upper layer of non-woven fabric. The height of the elastic block in a free state is higher than the height of the absorbent body. There are two elastic blocks, and the elastic blocks and the absorbent body are located on both sides of the guide groove. The elastic block is a water-absorbent sponge, and a water-repellent layer is provided on the top surface of the water-absorbent sponge close to human skin and the side surface away from the center of the core body.

2. The ultra-thin non-inductive core according to claim 1, characterized in that: The upper non-woven fabric is a spunlace non-woven fabric.

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