A fluffy composite core

Abstract

The present disclosure relates to a fluffy composite core, comprising a core body, the core body comprising a first water-absorbing layer, a second water-absorbing layer and a third water-absorbing layer stacked in sequence, a first fluffy layer arranged between the first water-absorbing layer and the second water-absorbing layer, a second fluffy layer arranged between the second water-absorbing layer and the third water-absorbing layer, a first wrapping layer arranged on the side of the first water-absorbing layer away from the first fluffy layer, and a second wrapping layer arranged on the side of the third water-absorbing layer away from the second fluffy layer, so that the core body has a three-layer water-absorbing structure; the first water-absorbing layer, the second water-absorbing layer and the third water-absorbing layer are all provided with a supporting structure, the supporting structure has a filling cavity, and the filling cavity is filled with water-absorbing material. The present disclosure can disperse the moisture absorption load to more layers by providing three layers of water-absorbing layers, so that the absorption pressure borne by each layer can be reduced, thereby effectively reducing the situation of excessive water absorption, aggregation or even agglomeration of any water-absorbing layer, and reducing the phenomenon of agglomeration or lumping.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sanitary products, and in particular to a fluffy composite core. Background Art

[0002] The production process of the traditional composite core products commonly seen on the market usually involves first combining two layers of fluffy fabric into one layer, and then adding water-absorbing polymers to the inner and outer layers of the fluffy fabric. However, under this process, it is difficult for the water-absorbing polymers to effectively penetrate into the interior of the fluffy fabric, and most polymer materials tend to accumulate only on the surface of the fluffy fabric.

[0003] After searching, it is known that in existing patents, for example, patent CN201721504970.0 discloses a new type of diaper core, including hydrophilic non-woven fabric, water-absorbing polymer, thread glue, dust-free paper and wood pulp polymer mixed material. The hydrophilic non-woven fabric is arranged in the middle layer of the core, and a layer of water-absorbing polymer is evenly spread on the bottom and top of the hydrophilic non-woven fabric. The upper dust-free paper is bonded to the water-absorbing polymer through thread glue and wraps the wood pulp polymer mixed material inside. The lower dust-free paper is directly bonded to the water-absorbing polymer of the lower layer through thread glue. The wood pulp polymer mixed material is a mixture of water-absorbing polymer particles and wood pulp fibers; the diaper core innovatively arranges multiple hemispherical wood pulp polymer mixed materials on the surface of the upper water-absorbing polymer, and sews and wraps them with dust-free paper, using the rapid water absorption of wood pulp to achieve rapid diffusion of liquid around. The above-mentioned new diaper core still has the following defects in practical applications:

[0004] First, the hydrophilic non-woven fabric is arranged in the middle layer of the core, and a layer of water-absorbent polymer is evenly spread on the bottom and top of the hydrophilic non-woven fabric. In actual use, this structure has a low utilization rate on both sides of the core because urine is mainly concentrated in the middle of the core. When the amount of urine is large, the middle of the core tends to become wet. At the same time, the polymer after absorbing water tends to clump and gather to the gravity side when the user is active, forming a clumping phenomenon, which affects the moisture absorption performance and the user's experience.

[0005] Secondly, the core of the diaper innovatively arranges multiple hemispherical wood pulp polymer mixed materials on the upper absorbent polymer surface, and sews and wraps them with dust-free paper to quickly diffuse liquid around them by using the rapid water absorption of wood pulp. This hemispherical structure requires precise process control during the production process to ensure that each hemisphere can be evenly and stably attached to the absorbent polymer surface. If the process control is improper, it may cause uneven distribution of the hemispheres or even fall off, which will affect the moisture absorption performance and overall stability of the core. After absorbing a large amount of urine, the hemispherical structure may deform or rupture due to the expansion force, causing the core to clump or break, which not only affects the moisture absorption efficiency of the core, but also may cause discomfort to the user. Utility Model Content

[0006] In order to solve the problems existing in the above-mentioned prior art, the purpose of the present disclosure is to provide a fluffy composite core. The fluffy composite core is provided with three water-absorbing layers, which can disperse the moisture absorption load to more layers compared with the traditional two-layer water-absorbing layer, so as to reduce the absorption pressure borne by each layer, thereby effectively reducing the excessive water absorption, aggregation or even agglomeration of any water-absorbing layer, reducing the phenomenon of agglomeration or lumping, and improving the stability and use effect of the core body.

[0007] The fluffy composite core disclosed in the present invention comprises:

[0008] A core body, the core body comprising a first water-absorbing layer, a second water-absorbing layer and a third water-absorbing layer which are sequentially stacked, a first fluffy layer arranged between the first water-absorbing layer and the second water-absorbing layer, a second fluffy layer arranged between the second water-absorbing layer and the third water-absorbing layer, a first wrapping layer arranged on a side of the first water-absorbing layer away from the first fluffy layer, and a second wrapping layer arranged on a side of the third water-absorbing layer away from the second fluffy layer, so that the core body has a three-layer water-absorbing structure;

[0009] A support structure is provided in each of the first water absorbing layer, the second water absorbing layer and the third water absorbing layer. The support structure has a filling cavity filled with a water absorbing material.

[0010] Preferably, the support structure is made of wood pulp, and the support structure comprises a plurality of support bars, and the plurality of support bars are arranged at intervals along the length and / or width direction of the core body, and the filling cavity is formed beside each of the support bars.

[0011] Preferably, the support bars of the first water absorbing layer and the second water absorbing layer are staggered, and the support bars of the second water absorbing layer and the third water absorbing layer are staggered.

[0012] Preferably, the arrangement spacing between two adjacent support bars is 2 mm to 6 mm.

[0013] Preferably, the support structure is made of wood pulp, and the support structure comprises a support net having a plurality of grids, each of which has the filling cavity.

[0014] Preferably, the thickness of the first water absorbing layer and the third water absorbing layer are both 0.8 mm to 1.2 mm.

[0015] Preferably, the second water absorbing layer has a thickness of 0.4-0.6 mm.

[0016] Preferably, the first wrapping layer and the second wrapping layer are both made of dust-free paper;

[0017] The first fluffy layer and the second fluffy layer are both made of fluffy cloth.

[0018] Preferably, the water-absorbing material is a water-absorbing polymer, and the water-absorbing polymer is made of sodium polyacrylate.

[0019] Preferably, the first wrapping layer, the first water absorbing layer, the first fluffy layer, the second water absorbing layer, the second fluffy layer, the third water absorbing layer and the second wrapping layer are compounded in sequence by hot melt adhesive.

[0020] The fluffy composite core disclosed in the present invention has the following advantages:

[0021] 1. A fluffy composite core disclosed in the present invention has a core body, which includes a first water-absorbing layer, a second water-absorbing layer and a third water-absorbing layer which are stacked in sequence, a first fluffy layer arranged between the first water-absorbing layer and the second water-absorbing layer, a second fluffy layer arranged between the second water-absorbing layer and the third water-absorbing layer, a first wrapping layer arranged on a side of the first water-absorbing layer away from the first fluffy layer, and a second wrapping layer arranged on a side of the third water-absorbing layer away from the second fluffy layer, so that the core body has a three-layer water-absorbing structure; a supporting structure is arranged in the first water-absorbing layer, the second water-absorbing layer and the third water-absorbing layer, and the supporting structure has a filling cavity, and the filling cavity is filled with a water-absorbing material. By setting up three water-absorbing layers, compared with the traditional two-layer water-absorbing layer, the moisture absorption load can be dispersed to more layers, which can reduce the absorption pressure on each layer, thereby effectively reducing the excessive water absorption, aggregation or even clumping of any water-absorbing layer, reducing the phenomenon of caking or clumping, and improving the stability and use effect of the composite core; and by setting up the first fluffy layer and the second fluffy layer, the fluffiness of the core body can be increased, giving the water-absorbing layer more expansion space, increasing the conduction effect of the core body, and improving the utilization rate of the core body.

[0022] 2. The support structure of a fluffy composite core disclosed in the present invention has a filling cavity filled with a water-absorbing material; the support structure is made of wood pulp, and the support structure includes a plurality of support bars, and the plurality of support bars are arranged at intervals along the length and / or width direction of the core body, forming a filling cavity beside each support bar; the water-absorbing material is a water-absorbing polymer. By providing a support structure made of wood pulp, the support structure includes a plurality of support bars. When in use, after the liquid reaches the surface of the composite core, the core body has a certain degree of fluffiness and the presence of the support bars, the liquid will be conducted more quickly, and the first water-absorbing layer, the second water-absorbing layer and the third water-absorbing layer all have support bars and water-absorbing polymers, which can quickly conduct the liquid while being quickly absorbed by the water-absorbing polymers of each water-absorbing layer, effectively reducing reverse osmosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a cross-sectional view of the structure of Example 1 of a fluffy composite core disclosed in the present invention;

[0024] Figure 2 This is a schematic diagram of the assembly of the first fluffy layer and the supporting structure in Example 1 of a fluffy composite core according to the present disclosure;

[0025] Figure 3 It is a schematic diagram of the assembly of the first fluffy layer and the supporting structure in Example 2 of a fluffy composite core described in the present disclosure.

[0026] Description of reference numerals:

[0027] 10- first water absorbing layer;

[0028] 20- second water absorbing layer;

[0029] 30- the third water absorbing layer;

[0030] 40-first fluffy layer;

[0031] 50-second fluffy layer;

[0032] 60-first wrapping layer;

[0033] 70- second wrapping layer;

[0034] 80-support structure;

[0035] 90-Water-absorbing polymer. DETAILED DESCRIPTION

[0036] like Figure 1 - Figure 3 As shown, a fluffy composite core according to the present disclosure comprises:

[0037] Example 1

[0038] The core body comprises a first water-absorbing layer 10, a second water-absorbing layer 20 and a third water-absorbing layer 30 which are stacked in sequence, a first fluffy layer 40 arranged between the first water-absorbing layer 10 and the second water-absorbing layer 20, a second fluffy layer 50 arranged between the second water-absorbing layer 20 and the third water-absorbing layer 30, a first wrapping layer 60 arranged on a side of the first water-absorbing layer 10 away from the first fluffy layer 40, and a second wrapping layer 70 arranged on a side of the third water-absorbing layer 30 away from the second fluffy layer 50, so that the core body has a three-layer water-absorbing structure;

[0039] A plurality of support structures 80 are disposed in the first water absorbing layer 10, the second water absorbing layer 20 and the third water absorbing layer 30. The support structures 80 have a filling cavity filled with a water absorbing material.

[0040] By setting up three water-absorbing layers, compared with the traditional two-layer water-absorbing layer, the moisture absorption load can be dispersed to more layers, which can reduce the absorption pressure on each layer, thereby effectively reducing the excessive water absorption, aggregation or even clumping of any water-absorbing layer, reducing the phenomenon of caking or clumping, and improving the stability and use effect of the core body; and by setting up the first fluffy layer and the second fluffy layer, the fluffiness of the core body can be increased, giving the water-absorbing layer more expansion space, increasing the conduction effect of the core body, and improving the utilization rate of the core body.

[0041] Furthermore, in this embodiment, the support structure 80 is made of wood pulp, and the support structure 80 includes a plurality of support bars, which are arranged at intervals along the length and / or width direction of the core body, and a filling cavity is formed beside each support bar; the support bars are made of wood pulp, have high water absorption, can quickly absorb liquid, and disperse the liquid to a wider area through its unique structure, and then absorb it through the absorbent material; and the support bars can form a relatively stable core structure, so that the core body is not easy to deform or clump after absorbing liquid, and this stability helps to maintain the flatness and absorption performance of the core body, and improve the service life of the product;

[0042] Since the core body has a certain fluffiness and the existence of support strips, the liquid will be conducted faster, and the first water-absorbing layer 10, the second water-absorbing layer 20 and the third water-absorbing layer 30 all have support strips and water-absorbing materials. While the liquid is quickly conducted, it can be quickly absorbed by the water-absorbing materials of each water-absorbing layer, effectively reducing reverse osmosis.

[0043] Furthermore, in this embodiment, the support strips of the first water absorbent layer 10 and the second water absorbent layer 20 are staggered, and the support strips of the second water absorbent layer 20 and the third water absorbent layer 30 are staggered; the staggered arrangement makes it more difficult for the absorbed liquid to seep back into the surface layer in contact with the skin, and the staggered support strips can form a more stable three-dimensional structure, so that the composite core is not easily deformed or clumps after absorbing liquid.

[0044] Furthermore, in this embodiment, the arrangement spacing between two adjacent support bars is 2 mm to 6 mm; the optimal selection is 4 mm, and too narrow or too wide spacing will weaken the effect of the support bars.

[0045] Example 2

[0046] This embodiment is the same as embodiment 1, except that the support structure 80 is made of wood pulp, and the support structure 80 includes a support net, the support net has a plurality of grids, and each grid has a filling cavity; the support net with a mesh structure can disperse the liquid more effectively, and the support net can also form a more stable core structure. This structure makes it difficult for the core body to deform or clump after absorbing the liquid, thereby maintaining the flatness and absorption performance of the core body.

[0047] The support structure 80 can be selected according to the actual use situation using a support net or a plurality of support bars in the first embodiment. Compared with the support net, the support bar is simple to manufacture, has a larger filling cavity range, can be filled with more water-absorbing materials, and has a better water-absorbing effect, but the supporting effect is worse than that of the support net; compared with the support bar, the support net has a higher overall strength, a better supporting effect, and can better withstand external pressure and impact. Therefore, a suitable support structure 80 is selected according to the actual use needs.

[0048] Furthermore, in this embodiment, the thickness of the first water absorbing layer 10 and the third water absorbing layer 30 are both 0.8 mm to 1.2 mm; the optimal thickness of the first water absorbing layer 10 and the third water absorbing layer 30 is 1.0 mm.

[0049] Furthermore, in this embodiment, the thickness of the second water absorbing layer 20 is 0.4-0.6 mm; the optimal thickness of the second water absorbing layer 20 is 0.5 mm.

[0050] Furthermore, in this embodiment, the first wrapping layer 60 and the second wrapping layer 70 are both made of dust-free paper; adding dust-free paper can reduce the leakage of the water-absorbing polymer 90. Dust-free paper is also called dry papermaking nonwoven fabric or dustproof paper. It uses 100% wood pulp fiber as raw material, is opened into single fiber state fiber, and then uses air-laid technology to reinforce the fiber web, and finally forms paper with unique physical properties; it has the characteristics of high elasticity, softness, excellent hand feel and drape, and also has extremely high water absorption and good water retention performance;

[0051] The first fluffy layer 40 and the second fluffy layer 50 are both made of fluffy cloth; the fluffy cloth can be specifically short-fiber hot air cloth, which is a high-tech new material made of polyester by hot melt blowing. This material usually has the characteristics of high fluffiness, good elasticity, soft hand feeling, skin-friendly, good air permeability and water permeability. During its manufacturing process, raw materials such as polyester fiber, nylon, modified polyester, etc. are melt-spun to form a fiber net, and then stretched to form a certain gap and fluffy structure between the fibers.

[0052] Furthermore, in this embodiment, the water-absorbing material is a water-absorbing polymer 90, and the water-absorbing polymer 90 is made of sodium polyacrylate material; sodium polyacrylate is a new functional polymer material and an important chemical product with excellent water absorption performance. When used to make water-absorbing polymers, it can effectively absorb and retain moisture, thereby improving the hygroscopic properties of the composite core.

[0053] Furthermore, in the present embodiment, the first wrapping layer 60, the first water absorbing layer 10, the first fluffy layer 40, the second water absorbing layer 20, the second fluffy layer 50, the third water absorbing layer 30 and the second wrapping layer 70 are compounded in sequence by hot melt adhesive; the hot melt adhesive has high viscosity and strong bonding force, which can ensure that each layer fits tightly and is not easy to separate; and the hot melt adhesive does not contain organic solvents and volatiles, and does not produce toxic gases and harmful substances during use, which is very environmentally friendly.

[0054] In summary, the manufacturing process of the fluffy composite core of the support structure 80 including a plurality of support strips is as follows:

[0055] After the first fluffy layer 40 is made, a strip-shaped support strip is pressed out with a wood pulp mold wheel and compounded on top of the first fluffy layer; after compounding multiple support strips at intervals, a water-absorbing polymer 90 is added to the place where there is no compound support strip above it to form a first water-absorbing layer 10. In order to reduce the leakage of the water-absorbing polymer 90, a first wrapping layer 60 is compounded on it, and then it is turned over. After the turning over is completed, a plurality of composite support strips are added above the flipped first fluffy layer 40 and the water-absorbing polymer 90 is added to the place where there is no composite support strip above it to form a second water-absorbing layer 20, and a second fluffy layer 50 is compounded on it; a plurality of composite support strips are added above the second fluffy layer 50 and the water-absorbing polymer 90 is added to the place where there is no composite support strip above it to form a third water-absorbing layer 30, and a second wrapping layer 70 is compounded on it to form a fluffy composite core as a whole.

[0056] In the description of the present disclosure, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0057] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the present disclosure.

Claims

1. A fluffy composite core, characterized in that: include: A core body, the core body comprising a first water-absorbing layer (10), a second water-absorbing layer (20) and a third water-absorbing layer (30) which are stacked in sequence, a first fluffy layer (40) arranged between the first water-absorbing layer (10) and the second water-absorbing layer (20), a second fluffy layer (50) arranged between the second water-absorbing layer (20) and the third water-absorbing layer (30), a first wrapping layer (60) arranged on a side of the first water-absorbing layer (10) away from the first fluffy layer (40), and a second wrapping layer (70) arranged on a side of the third water-absorbing layer (30) away from the second fluffy layer (50), so that the core body has a three-layer water-absorbing structure; A support structure (80) is provided in each of the first water-absorbing layer (10), the second water-absorbing layer (20) and the third water-absorbing layer (30); the support structure (80) has a filling cavity, and the filling cavity is filled with a water-absorbing material.

2. The fluffy composite core according to claim 1, characterized in that: The support structure (80) is made of wood pulp and comprises a plurality of support bars, which are arranged in an interval along the length and / or width direction of the core body, and the filling cavity is formed beside each of the support bars.

3. The fluffy composite core according to claim 2, characterized in that: The support bars of the first water absorbing layer (10) and the second water absorbing layer (20) are arranged in a staggered manner, and the support bars of the second water absorbing layer (20) and the third water absorbing layer (30) are arranged in a staggered manner.

4. The fluffy composite core according to claim 2 or 3, characterized in that: The arrangement spacing between two adjacent support bars is 2 mm to 6 mm.

5. The fluffy composite core according to claim 1, characterized in that: The support structure (80) is made of wood pulp and comprises a support net having a plurality of grids, each of which has the filling cavity.

6. The fluffy composite core according to claim 2 or 5, characterized in that: The thickness of the first water absorbing layer (10) and the third water absorbing layer (30) are both 0.8 mm to 1.2 mm.

7. The fluffy composite core according to claim 2 or 5, characterized in that: The thickness of the second water-absorbing layer (20) is 0.4-0.6 mm.

8. The fluffy composite core according to claim 1, characterized in that: The first wrapping layer (60) and the second wrapping layer (70) are both made of dust-free paper; The first fluffy layer (40) and the second fluffy layer (50) are both made of fluffy cloth.

9. The fluffy composite core according to claim 1, characterized in that: The water-absorbing material is a water-absorbing polymer (90), and the water-absorbing polymer (90) is made of sodium polyacrylate.

10. The fluffy composite core according to claim 1, characterized in that: The first wrapping layer (60), the first water absorbing layer (10), the first fluffy layer (40), the second water absorbing layer (20), the second fluffy layer (50), the third water absorbing layer (30) and the second wrapping layer (70) are sequentially compounded by hot melt adhesive.

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