Composite core

Abstract

The utility model relates to the field of disposable hygienic products, and provides a composite core body which comprises a core body, the core body comprises a first absorption layer and a second absorption layer arranged on the top of the first absorption layer, and the second absorption layer comprises upper-layer non-woven fabric, lower-layer non-woven fabric and a plurality of second core bodies arranged between the upper-layer non-woven fabric and the lower-layer non-woven fabric. The second core bodies are arranged in the length direction, a flow guide groove is formed between every two adjacent second core bodies, at least one first glue spraying part arranged in the length direction is arranged at the top of each second core body, and each first glue spraying part is located in the middle of the corresponding second core body and comprises a plurality of point-shaped first glue spraying points; and the second core body and the upper-layer non-woven fabric are fixed through the first glue spraying part. When the top of the second core body absorbs a large amount of urine, the second core body can expand, the two sides of the second core body have enough expansion spaces, the stripping force of the absorption core body is large, the liquid absorption space of the second core body is increased, and the technical problem that the core body is poor in flow guide and liquid absorption effect is solved.

Description

Technical Field

[0001] This utility model relates to the field of disposable hygiene products, and in particular to a composite core. Background Technology

[0002] Existing disposable hygiene products typically use a core made of two or more materials with different properties. The core includes a flow-guiding material and an absorbent material, such as wood pulp and SAP. When the core absorbs liquid, it expands. The top and bottom surfaces of the core are lined with non-woven fabric, which is fully secured with adhesive. The adhesive inhibits the expansion of the core, reducing its peeling force and thus decreasing its flow-guiding and absorbent effects.

[0003] Chinese Patent Application No. 202122074493.1 discloses a novel soft absorbent core, comprising a water-absorbing gel fluffy fabric layer and a non-woven fabric layer. The water-absorbing gel fluffy fabric layer refers to a fluffy fabric uniformly adsorbed with acrylic gel inside and out, and the top and bottom of the water-absorbing gel fluffy fabric layer are covered with non-woven fabric layers. This novel soft absorbent core, with its water-absorbing gel fluffy fabric layer, improves the core's absorbency. The core is breathable, soft, and lightweight, with no grainy feel, making it more comfortable for the wearer. When the absorbent core absorbs liquid, it expands. The top and bottom surfaces of the absorbent core are covered with non-woven fabric, which is fully fixed with adhesive. The adhesive inhibits the expansion of the absorbent core, reducing the peeling force and thus lowering the core's drainage and absorption efficiency. Utility Model Content

[0004] Therefore, to address the aforementioned problems, this invention proposes a composite core. It solves the technical problem of poor flow guidance and liquid absorption in the core.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite core includes a core body, the core body including a first absorbent layer and a second absorbent layer disposed on top of the first absorbent layer. The second absorbent layer includes an upper nonwoven fabric, a lower nonwoven fabric, and a plurality of second cores disposed between the upper and lower nonwoven fabrics. The second cores are arranged along the length direction, and a guide groove is formed between two adjacent second cores. At least one first adhesive spraying part is provided on the top of the second core along the length direction. The first adhesive spraying part is located in the middle of the second core and includes a plurality of dot-shaped first adhesive spraying points. The second core and the upper nonwoven fabric are fixed by the first adhesive spraying part.

[0007] Further:

[0008] There is one first adhesive spraying section, and the first adhesive spraying point is located in the middle of the top of the second core.

[0009] The distance between adjacent first spray dots gradually decreases from the middle to both ends.

[0010] The guide channel does not contain water-absorbing material.

[0011] The width of the guide channel gradually decreases from the middle to both sides.

[0012] The front and rear ends of two adjacent second cores abut against each other.

[0013] The first absorbent layer includes a first core disposed at the bottom of the lower nonwoven fabric and a nonwoven fabric layer disposed at the bottom of the first core.

[0014] The bottom of the second core is provided with at least one second adhesive spraying section arranged along the length direction. The second adhesive spraying section includes a plurality of dot-shaped second adhesive spraying points. The second core and the lower nonwoven fabric are fixed by the second adhesive spraying section.

[0015] There are two second glue spraying sections, and the second glue spraying points of the two second glue spraying sections are arranged alternately.

[0016] The distance between adjacent second spray dots gradually decreases from the middle to both ends.

[0017] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0018] The second core of this invention is fixed to the middle of its top only by the first adhesive spraying part. When the top of the second core absorbs a large amount of urine, the second core can expand. The first adhesive spraying part has almost no effect on the expansion of the second core. The two sides of the second core have sufficient expansion space, which makes the peeling force of the absorbent core large and greatly improves the liquid absorption space of the second core. The guide groove has the function of guiding the flow, which can improve the diffusion and seepage speed of urine. The first adhesive spraying part is a dotted structure. Some of the first adhesive spraying points may fall off under force, which improves the peeling force of the absorbent core. Furthermore, since the middle part needs to absorb a large amount of urine... The first adhesive dots at both ends have a high density, resulting in good fixation, while the density in the middle is low, leading to poor fixation and easy detachment of the first adhesive dots in the middle. This design improves the peeling force. Furthermore, the width of the guide channel gradually decreases from the middle to both sides. This structure effectively prevents leakage at the front and rear ends. The middle of the second core has a large liquid absorption capacity and expands significantly, allowing the guide channel to provide greater expansion space. Additionally, the liquid absorption capacity at the bottom of the second core is less than at the top. Therefore, the second adhesive dots at the bottom of the second core are two in number, improving the fixation effect and preventing the second core from shifting position after expansion. At the same time, the bottom of the second core can also expand. Attached Figure Description

[0019] Figure 1 This is a simplified cross-sectional view of the core body of this utility model.

[0020] Figure 2 This is a schematic diagram of the second core.

[0021] Figure 3 This is a schematic diagram of the structure of the first adhesive spraying section at the top of the second core.

[0022] Figure 4 This is a schematic diagram of the structure of the second adhesive spraying section at the bottom of the second core.

[0023] Figure 5 This is another structural schematic diagram of the second core guide channel.

[0024] Figure label:

[0025] 1. First absorbent layer; 11. First core; 12. Non-woven fabric layer; 2. Second absorbent layer; 21. Upper non-woven fabric; 22. Lower non-woven fabric; 23. Second core; 24. Guide channel; 25. First adhesive spraying section; 250. First adhesive spraying point; 26. Second adhesive spraying section; 260. Second adhesive spraying point. Detailed Implementation

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] refer to Figures 1 to 3 This embodiment provides a composite core, including a core body, the core body including a first absorbent layer 1 and a second absorbent layer 2 disposed on top of the first absorbent layer 1. The second absorbent layer 2 includes an upper nonwoven fabric 21, a lower nonwoven fabric 22, and a plurality of second cores 23 disposed between the upper nonwoven fabric 21 and the lower nonwoven fabric 22. The second cores 23 are arranged along the length direction, and a guide groove 24 is formed between two adjacent second cores 23. The top of the second core 23 is provided with at least one first adhesive spraying part 25 arranged along the length direction. The first adhesive spraying part 25 is located in the middle of the second core 23 and includes a plurality of dot-shaped first adhesive spraying points 250. The second core 23 and the upper nonwoven fabric 21 are fixed by the first adhesive spraying part 25.

[0028] refer to Figure 3 In one embodiment, there is one first adhesive spraying section 25, and the first adhesive spraying point 250 is located at the middle of the top of the second core 23. The distance between adjacent first adhesive spraying points 250 gradually decreases from the middle to both ends.

[0029] refer to Figure 4In one embodiment, the bottom of the second core 23 is provided with two second adhesive spraying sections 26 arranged along the length direction. The second adhesive spraying section 26 includes a plurality of dot-shaped second adhesive spraying points 260. The second core 23 and the lower nonwoven fabric 22 are fixed by the second adhesive spraying section 26. The second adhesive spraying points 260 of the two second adhesive spraying sections 26 are arranged alternately, and the distance between adjacent second adhesive spraying points 260 gradually decreases from the middle to the front and rear ends.

[0030] refer to Figure 5 In one embodiment, the width of the guide groove 24 gradually decreases from the middle to both sides, and the front and rear ends of two adjacent second cores 23 abut against each other.

[0031] In one embodiment, the first absorbent layer 1 includes a first core 11 disposed at the bottom of the lower nonwoven fabric 22 and a nonwoven fabric layer 12 disposed at the bottom of the first core 11. In this structure, the top of the first core 11 is no longer provided with a nonwoven fabric, which can improve the flow and infiltration speed of urine.

[0032] The aforementioned drainage channel 24 typically does not contain absorbent material, which improves the drainage effect and prevents the absorbent material from swelling and obstructing the flow of urine after absorbing water.

[0033] The thickness of the second absorption layer 2 is usually 2 to 5 times the thickness of the first absorption layer 1, or the thickness can be set to be equal, depending on the specific situation.

[0034] The core body of this invention can be used in diapers, pull-up pants, or other disposable hygiene products.

[0035] The working principle of this utility model is as follows:

[0036] When diapers or pull-ups are worn on the human body, a large amount of urine can be guided and diffused on the guide channel 24 when urine flows into the core body. The first core and the second core 23 absorb the urine. When the top of the second core 23 absorbs a large amount of urine, the second core 23 can expand. The first adhesive spray part 25 has almost no effect on the expansion of the second core 23. The two sides of the second core 23 have sufficient expansion space, which makes the peeling force of the absorbent core large and increases the liquid absorption space of the second core 23.

[0037] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A composite core, characterized in that: The device includes a core body, which comprises a first absorbent layer and a second absorbent layer disposed on top of the first absorbent layer. The second absorbent layer comprises an upper nonwoven fabric, a lower nonwoven fabric, and a plurality of second cores disposed between the upper and lower nonwoven fabrics. The second cores are arranged along the length direction, and a guide groove is formed between two adjacent second cores. At least one first adhesive spraying part is provided on the top of the second core along the length direction. The first adhesive spraying part is located in the middle of the second core and includes a plurality of dot-shaped first adhesive spraying points. The second core and the upper nonwoven fabric are fixed by the first adhesive spraying part.

2. The composite core according to claim 1, characterized in that: There is one first adhesive spraying section, and the first adhesive spraying point is located in the middle of the top of the second core.

3. A composite core according to claim 2, characterized in that: The distance between adjacent first spray dots gradually decreases from the middle to both ends.

4. A composite core according to claim 1, characterized in that: The guide channel does not contain water-absorbing material.

5. A composite core according to claim 1, characterized in that: The width of the guide channel gradually decreases from the middle to both sides.

6. A composite core according to claim 5, characterized in that: The front and rear ends of two adjacent second cores abut against each other.

7. A composite core according to claim 1, characterized in that: The first absorbent layer includes a first core disposed at the bottom of the lower nonwoven fabric and a nonwoven fabric layer disposed at the bottom of the first core.

8. A composite core according to any one of claims 1 to 7, characterized in that: The bottom of the second core is provided with at least one second adhesive spraying section arranged along the length direction. The second adhesive spraying section includes a plurality of dot-shaped second adhesive spraying points. The second core and the lower nonwoven fabric are fixed by the second adhesive spraying section.

9. A composite core according to claim 8, characterized in that: There are two second glue spraying sections, and the second glue spraying points of the two second glue spraying sections are arranged alternately.

10. A composite core according to claim 8, characterized in that: The distance between adjacent second spray dots gradually decreases from the middle to both ends.

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