Double-layer core structure

Abstract

The utility model discloses a double-layer core body structure which comprises a composite core body, the composite core body is divided into an upper-layer core body and a lower-layer core body, a wrapping layer is arranged outside the composite core body, a fluffy layer is arranged inside the composite core body, macromolecules are attached to the two sides of the fluffy layer, and the outer side of the fluffy layer is provided with a fluffy layer. The adhesion density of the macromolecules is gradually increased from the upper-layer core body to the lower-layer core body, the composite core body is folded into a C shape, the bending part of the composite core body is set as a bending area, and a sealing layer is arranged at the opening end of the composite core body after the composite core body is bent. The double-layer core body is manufactured in a folding mode, the arrangement mode of macromolecules is improved, flow guide is facilitated, the speed is increased, liquid absorption is accelerated, in the using process, symmetrical folding is conducted through the folding plates, the machining mode is simple, operation is convenient, more macromolecules can be attached in the unit area, and the service life is prolonged. The side surface wrapping non-woven fabric can reduce side surface leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of sanitary product production, in particular to a double-layer core structure. Background Art

[0002] At present, composite cores are generally produced by 3-4 polymer buckets. The amount of water-absorbing resin in a single bucket is limited during production. When the core basis weight exceeds 500g / m2 or a single bucket exceeds 100g / m2, the core basis weight will be unstable, fluctuate greatly, or the basis weight cannot be further increased, because too much polymer cannot be adhered to the unit surface layer, resulting in leakage of polymer, making it impossible to optimize the effectiveness of the composite core.

[0003] The applicant of the present utility model proposes a double-layer core structure. Utility Model Content

[0004] The utility model aims to provide a double-layer core structure, aiming to improve the existing composite core with low polymer content and finished product.

[0005] The utility model is achieved in this way:

[0006] A double-layer core structure comprises a composite core, wherein the composite core is divided into an upper core and a lower core, the outer portion of the composite core is arranged as a wrapping layer, and the inner portion of the composite core is arranged as a fluffy layer, polymers are attached to both sides of the fluffy layer, and the attachment density of the polymers gradually increases from the upper core to the lower core, the composite core is folded into a C-shape, and the bending portion of the composite core is arranged as a bending zone, and a sealing layer is arranged at the open end of the composite core after being bent.

[0007] A double-layer core is provided, and the composite core is changed by folding during use. The single-layer core is folded into a double-layer core, which can increase the absorption effect of the core during use. The composite core is produced in the width direction during processing, and then it can be symmetrically folded after passing through a folding plate. The polymer arrangement density is gradually increased to improve the absorption and water-locking effect of the lower core. A fluffy layer is provided in the middle of the core to improve comfort. A sealing layer is simultaneously provided on the folded composite core to ensure the water-locking effect.

[0008] Preferably, the polymer arrangement of the upper core is provided with empty grooves, and the polymer arrangement of the lower core is compact.

[0009] By optimizing the arrangement of polymers in the upper and lower cores, setting empty grooves in the upper layer is beneficial to speed up the flow guidance during use, and no gaps are set in the polymers in the lower core, which is beneficial to speed up the absorption of liquid in the upper layer and has a better water-locking effect.

[0010] Preferably, an inner partition is provided at the position where the upper core body and the lower core body are opposite to each other, and the inner partition is configured as hydrophobic cotton.

[0011] Preferably, the fluffy layer is made of fluffy cotton or fluffy non-woven fabric.

[0012] Preferably, the sealing layer is configured as a non-woven fabric layer, and the sealing layer and the composite core are fixed by hot melt adhesive.

[0013] By providing a wrapping non-woven fabric layer, it is possible to prevent polymer leakage at unsealed positions, and during use, the non-woven fabric can be selected from spunlace non-woven fabric, hot air non-woven fabric, and spunbond non-woven fabric.

[0014] Preferably, the outer portion of the wrapping layer at the lower end of the lower core is coated with a microporous membrane.

[0015] By coating the outer surface of the lower core with a microporous membrane, leakage can be reduced during use.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In the utility model, a double-layer core is made by folding, which improves the arrangement of polymers, thereby facilitating the flow guidance to speed up the speed and accelerate the absorption of liquid. During use, the symmetrical folding processing method through the folding plate is simple and easy to operate, more polymers can be attached per unit area, and the side wrapping of non-woven fabric can reduce leakage on the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the unfolded structure of a double-layer core structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the folding structure of a double-layer core structure shown in the utility model.

[0021] In the figure: 1. composite core; 2. fluffy layer; 3. polymer; 4. wrapping layer; 5. sealing layer; 6. bending area; 7. upper core; 8. lower core; 9. inner partition. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0023] For details, please refer to Figure 1 and Figure 2 As shown, a double-layer core structure includes a composite core 1, the outer portion of the composite core 1 is provided with a wrapping layer 4, and the inner portion of the composite core 1 is provided with a fluffy layer 2, the fluffy layer 2 is provided with fluffy cotton or fluffy non-woven fabric, the composite core 1 is divided into an upper core 7 and a lower core 8, the upper core 7 and the lower core 8 are used to distinguish different polymer 3 arrangement densities, which is convenient for distinguishing positions in the subsequent folding process, polymers 3 are attached to both sides of the fluffy layer 2, and the attachment density of the polymers 3 gradually increases from the upper core 7 to the lower core 8, the outer portion of the wrapping layer 4 at the lower end of the lower core 8 is coated with a microporous membrane, and the microporous membrane is coated on the lower surface of the wrapping layer 4, so that it can be provided during use. High waterproof effect, the microporous membrane can also be replaced with a water-blocking membrane during the implementation process, the composite core 1 is folded into a C shape, and the bending portion of the composite core 1 is set as a bending zone 6, and the polymer 3 in the bending zone 6 is densely arranged, which can avoid side leakage from the bending zone 6 due to poor liquid absorption capacity during use. After the composite core 1 is bent, a sealing layer 5 is set at the open end, and the sealing layer 5 is set as a non-woven fabric layer, and the sealing layer 5 and the composite core 1 are fixed by hot melt adhesive. The material of the wrapped non-woven fabric can be a non-woven fabric such as spunlace non-woven fabric, hot air non-woven fabric, and spunbond non-woven fabric. The non-woven fabric can prevent the polymer 3 from leaking from the unsealed position and the open end from not fitting tightly and causing side leakage.

[0024] The polymer 3 of the upper core 7 is arranged with empty grooves, and gaps are set between the polymers 3 in the upper core 7, which can absorb water and facilitate the diversion so that the liquid that has not been absorbed in time can be promptly guided downward to the lower core 8. The polymer 3 of the lower core 8 is tightly arranged, and an inner partition 9 is arranged at the opposite position of the upper core 7 and the lower core 8, and the inner partition 9 is set as hydrophobic cotton. The inner partition 9 can support the folded upper core 7 and the lower core 8 during use to avoid the core on both sides from being bent and squeezed to reduce the fluffiness during use, and the use of hydrophobic cotton will not reduce the hydrophobic effect, and the unabsorbed liquid of the upper core 7 can be promptly introduced into the lower core 8.

[0025] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A double-layer core structure, comprising a composite core (1), characterized in that: The composite core (1) is divided into an upper core (7) and a lower core (8); the outer portion of the composite core (1) is provided with a wrapping layer (4), and the inner portion of the composite core (1) is provided with a fluffy layer (2); polymers (3) are attached to both sides of the fluffy layer (2), and the attachment density of the polymers (3) gradually increases from the upper core (7) to the lower core (8); the composite core (1) is folded into a C-shape, and the bending portion of the composite core (1) is provided as a bending zone (6); and a sealing layer (5) is provided at the open end of the composite core (1) after being bent.

2. A double-layer core structure according to claim 1, characterized in that: The polymer (3) of the upper core (7) is arranged with empty grooves, and the polymer (3) of the lower core (8) is arranged tightly.

3. A double-layer core structure according to claim 1, characterized in that: An inner partition layer (9) is arranged at the position where the upper core body (7) and the lower core body (8) are opposite to each other, and the inner partition layer (9) is configured as hydrophobic cotton.

4. A double-layer core structure according to claim 2, characterized in that: The fluffy layer (2) is provided with fluffy cotton or fluffy non-woven fabric.

5. A double-layer core structure according to claim 3, characterized in that: The sealing layer (5) is configured as a non-woven fabric layer, and the sealing layer (5) and the composite core (1) are fixed by hot melt adhesive.

6. A double-layer core structure according to any one of claims 1 to 5, characterized in that: The outer portion of the wrapping layer (4) at the lower end of the lower core body (8) is coated with a microporous membrane.

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