CN218899959U - Absorbent core - Google Patents

Abstract

The present utility model relates to an absorbent core comprising: the diffusion absorption layer, the middle layer and the seepage-proofing absorption layer are sequentially laminated; the seepage-proofing absorbing layer is a sectional hollow viscose non-woven fabric, and in the sectional hollow viscose non-woven fabric, hollow sections and solid sections of the fibers are arranged in a staggered or interval mode. The composite core body is adopted by the absorbent core body, the defects that the wood pulp core body is too thick and is easy to break up and lump are overcome, the advantages of quick instantaneous liquid capturing of the wood pulp core body, light ventilation of the existing composite core body and the like are combined, the defects of poor temporary liquid capturing capability, poor diffusion performance and the like of the existing composite core body are overcome, the repeated liquid absorbing capability of a product is greatly improved, the diffusivity of the absorbent core body is obviously improved, the utilization rate and dryness of the core body are improved, and the absorbent core body has better absorption performance and reverse osmosis prevention performance.

Description

Absorbent core

Technical Field

The utility model relates to the technical field of sanitary products, in particular to an absorption core body.

Background

In the field of sanitary articles, disposable absorbent articles such as diapers and sanitary napkins are widely used, and the absorbent core is the core of the disposable absorbent article. There are two main types of absorbent cores currently on the market: a fluff pulp core is formed by wrapping fluff pulp and super absorbent resin with wet-strength paper or hydrophilic non-woven fabric, wherein the fluff pulp core has excellent instantaneous liquid capturing capability, but is easy to deform and slide after absorbing liquid, so that the fluff pulp core is accumulated and lump-formed and is easy to fault. The other is a composite core body which is composed of two layers of non-woven materials, a middle layer of fluffy non-woven fabric and two layers of super absorbent resin materials, overcomes the defects that the wood pulp core body is too thick and easy to fault, and the like, and is poor in instant liquid capturing capacity due to lack of diffusivity, and meanwhile, due to gel blocking caused by water expansion of the super absorbent resin, a seepage channel is blocked, liquid leakage occurs, the utilization rate of the core body is low, and liquid is difficult to diffuse to the periphery.

Disclosure of Invention

Based on this, it is necessary to provide an absorbent core which is required to solve the problems of the prior art that the absorbent core is liable to deform and slip after absorbing liquid, cause lump formation and faults, or lacks of diffusivity, has poor liquid capturing ability, is liable to cause liquid leakage, and has low core utilization.

An absorbent core comprising: the diffusion absorption layer, the middle layer and the seepage-proofing absorption layer are sequentially laminated; the seepage-proofing absorbing layer is a sectional hollow viscose non-woven fabric, and in the sectional hollow viscose non-woven fabric, hollow sections and solid sections of the fibers are arranged in a staggered or interval mode.

In one embodiment, the segmented hollow viscose nonwoven fabric has a grammage in the range of 25gsm to 50gsm; alternatively, the segmented hollow viscose nonwoven fabric has a grammage of 30gsm.

In one embodiment, the diffusion absorbing layer is a nonwoven layer.

In one embodiment, the fiber section of the diffusion absorption layer is arranged in a trilobal shape.

In one embodiment, the diffusion layer has a grammage in the range of 25gsm to 50gsm; alternatively, the diffusion layer has a grammage of 30gsm.

In one embodiment, the intermediate layer is a fluffy non-woven layer, and the intermediate layer is further added with a high water absorption material.

In one embodiment, the superabsorbent material is a superabsorbent resin.

In one embodiment, the super absorbent resin is disposed on the top and bottom layers of the middle layer.

In one embodiment, an adhesive is arranged between the diffusion absorption layer and the intermediate layer and between the intermediate layer and the impermeable absorption layer.

In one embodiment, a high water absorption material is arranged between the diffusion absorption layer and the intermediate layer and between the intermediate layer and the impermeable absorption layer; or, between the diffusion absorption layer and the intermediate layer, the high water absorption resin is arranged between the intermediate layer and the seepage-proof absorption layer.

The beneficial effects of this technical scheme include at least: the composite core is adopted by the absorption core, the defects that the wood pulp core is too thick and is easy to break up and stick together are overcome, and the advantages of quick instantaneous liquid capturing of the wood pulp core, light ventilation of the existing composite core and the like are combined. Specifically, the diffusion absorption layer of the absorption core body of the technical scheme is a surface layer, can rapidly absorb and conduct liquid, simultaneously reduces the rewet amount in the material, reduces the liquid amount in contact with the skin of a user, is beneficial to the reduction of the whole rewet amount of the product, maintains the dryness of the product in the use process, improves the defects of poor temporary liquid capturing capability, weak diffusion performance and the like of the traditional composite core body, greatly improves the repeated liquid absorbing capability of the product, obviously improves the diffusivity of the absorption core body, and improves the utilization rate and dryness of the core body. Meanwhile, the impermeable layer of the technical scheme is a bottom layer, the sectional hollow viscose fiber non-woven fabric is adopted, the sectional hollow structure is that the fiber part is hollow and the part is solid, the hollow part improves the pressure resistance, reverse osmosis prevention is carried out, and the solid part improves the absorption capacity, so that the bottom layer has strong liquid retention, liquid can be stored between the fibers and in the limiting inner part, even if pressure is applied to the absorption core body, the liquid can still be reserved in the fiber and cannot reversely permeate upwards to the surface layer, the reverse osmosis amount of the core body is reduced, the dryness of a product is kept, and the liquid has better absorption performance and reverse osmosis prevention performance.

Drawings

Fig. 1 is a schematic cross-sectional view of an absorbent core according to an embodiment of the present utility model.

Reference numerals: 10. a diffusion absorption layer; 11. a blade; 20. an intermediate layer; 21. a superabsorbent material; 30. an impermeable absorbent layer; 31. a hollow portion; 32. a solid portion.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

An absorbent core as shown in figure 1, comprising: the diffusion absorption layer 10, the middle layer 20 and the seepage-proof absorption layer 30 are sequentially stacked; the impermeable absorbing layer 30 is a sectional hollow viscose non-woven fabric, and in the sectional hollow viscose non-woven fabric of this embodiment, hollow sections and solid sections of the fibers are staggered or spaced, so as to balance the liquid absorbing capacity and impermeable capacity of the impermeable absorbing layer 30 as much as possible. For example, in the sectional hollow viscose fiber nonwoven fabric, including the condition that the fibers are folded and the fibers are folded, the hollow sections are adjacent to the solid sections (staggered) or are spaced apart from the solid sections by one or more other hollow sections, so that the impermeable absorbing layer 30 has both the hollow portion 31 and the solid portion 32 in a certain local same section, thereby enabling the local part to rapidly catch liquid through the solid sections and store liquid and resist compression and reverse osmosis through the hollow sections.

The composite core body is adopted as the absorption core body, so that the defects that the wood pulp core body is too thick and easy to form faults and lump are overcome, and the advantages of quick instant liquid capturing of the wood pulp core body, light ventilation of the existing composite core body and the like are combined. Specifically, the diffusion absorption layer 10 of the absorption core of the embodiment is a surface layer, can rapidly absorb and conduct liquid, simultaneously reduces the rewet amount in the material, reduces the liquid amount in contact with the skin of a user, is beneficial to reducing the overall rewet amount of the product, maintains the dryness of the product in the use process, overcomes the defects of poor temporary liquid capturing capability, weak diffusion performance and the like of the existing composite core, greatly improves the repeated liquid absorbing capability of the product, remarkably improves the diffusivity of the absorption core, and improves the utilization rate and dryness of the core. Meanwhile, the impermeable layer in the embodiment is a bottom layer, the sectional hollow viscose fiber non-woven fabric is adopted, the sectional hollow structure is that the fiber part is hollow and the part is solid, the hollow part 31 improves the pressure resistance, reverse osmosis is prevented, the solid part 32 improves the absorption capacity, so that the bottom layer has strong liquid retention, liquid can be stored between the fibers and in the limiting inner part, even if pressure is applied to the absorption core body, the liquid can still be reserved in the fiber and cannot reversely permeate upwards to the surface layer, the reverse osmosis quantity of the core body is reduced, the dryness of a product is kept, and the impermeable liquid is good in absorption performance and reverse osmosis prevention performance.

The gram weight range of the segmented hollow viscose non-woven fabric is 25-50 gsm; the impermeable absorbing layer 30 in the gram weight range has the advantages of both impermeable absorbing performance and manufacturing cost, fast liquid absorption and good liquid storage capacity, and ensures the comfort and the light degree of wearing of a user. Preferably, the gram weight of the segmented hollow viscose non-woven fabric is 30gsm.

The diffusion absorption layer 10 is a non-woven fabric layer, and the fiber section is made of the water thorn viscose fibers with the trilobal arrangement, the trilobal fiber cross section can form capillary channels, high-efficiency liquid diffusion efficiency is achieved, thereby the effect of rapid absorption and diffusion is achieved, the fiber section of the embodiment comprises three blades 11 which are evenly arranged at intervals in a divergent mode, one ends of the three blades 11 are connected into a whole, the other ends, namely the free ends, of the three blades 11 can be provided with arc radians, so that stress concentration of the free ends of the blades 11 is reduced, the structural strength of the blades 11 is increased, and meanwhile, the hand feeling of the diffusion absorption layer 10 is softer.

In other embodiments, other fibers having radially multi-lobed cross-sections may be used.

The grammage range of the diffusion absorption layer 10 in the embodiment is 25-50 gsm, and the diffusion absorption layer 10 in the grammage range has both diffusion absorption performance and manufacturing cost, and simultaneously ensures air permeability, bulk and comfort level of wearing by a user. Preferably, the grammage of the diffusion layer 10 according to the present embodiment is 30gsm.

The middle layer 20 is a fluffy non-woven fabric layer, has the advantages of high fluffiness, good elasticity, soft hand feeling, good air permeability and water permeability and the like, and the middle layer 20 is further added with the super absorbent material 21, namely the super absorbent material 21 is wrapped by the fluffy non-woven fabric, so that the liquid absorption capacity of the fluffy non-woven fabric is further enhanced, and when liquid enters the middle layer 20 through the diversion diffusion of the diffusion absorption layer 10, the liquid absorption capacity of the middle layer 20 is greatly improved by being absorbed by the super absorbent material 21 wrapped in the fluffy non-woven fabric.

Preferably, the superabsorbent material 21 is a superabsorbent resin, and the superabsorbent resin is safe and nontoxic in component, has hydrophilic groups, can absorb a large amount of moisture to swell and keep the moisture from flowing out, and can absorb the highest water absorption rate of more than 1000 times of the moisture which is 100 times of the volume of the resin.

The super absorbent resin of the embodiment is added to the surface layer and the bottom layer of the intermediate layer 20, that is, the surfaces of the intermediate layer 20 close to the diffusion absorption layer 10 and the surfaces of the intermediate layer close to the seepage-proofing absorption layer 30 are both added with the super absorbent resin, so that the performance of quickly capturing liquid and the whole bulk and dryness of the product can be well ensured.

In the present embodiment, an adhesive is provided between the diffusion absorbing layer 10 and the intermediate layer 20, and each layer is bonded by the adhesive between the intermediate layer 20 and the impermeable absorbing layer 30.

In addition, in order to improve the liquid absorption capacity of the absorbent core of the present embodiment, a superabsorbent material 21 is disposed between the diffusion absorption layer 10 and the intermediate layer 20, and between the intermediate layer 20 and the impermeable absorption layer 30, which is beneficial to improving the water absorption rate and the water absorption speed and reducing the reverse osmosis.

Preferably, between the diffusion absorption layer 10 and the intermediate layer 20 in this embodiment, a super absorbent resin is disposed between the intermediate layer 20 and the impermeable absorption layer 30, and the super absorbent resin forms a swollen gel once absorbing enough water, so that the gel has a strong water retention capacity, is not easy to be extruded even under pressure, and further improves reverse osmosis performance.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An absorbent core, comprising: the diffusion absorption layer, the middle layer and the seepage-proofing absorption layer are sequentially laminated; the seepage-proofing absorbing layer is a sectional hollow viscose non-woven fabric, and in the sectional hollow viscose non-woven fabric, hollow sections and solid sections of the fibers are arranged in a staggered or interval mode.

2. The absorbent core of claim 1 wherein the segmented hollow viscose nonwoven fabric has a grammage in the range of 25gsm to 50gsm.

3. The absorbent core of claim 1 wherein the diffusion absorbent layer is a nonwoven layer.

4. An absorbent core according to claim 3, characterized in that the fiber cross-section of the diffusion absorbent layer is arranged in a trilobal shape.

5. The absorbent core of claim 4 wherein the diffuse absorbent layer has a grammage in the range of 25gsm to 50gsm.

6. The absorbent core of claim 1 wherein the intermediate layer is a lofty nonwoven layer and the intermediate layer is further added with a superabsorbent material.

7. The absorbent core of claim 6 wherein said superabsorbent material is a superabsorbent resin.

8. The absorbent core of claim 7 wherein said superabsorbent resin is disposed in the top and bottom layers of said intermediate layer.

9. The absorbent core according to any of claims 1-8, wherein an adhesive is provided between the diffusion absorbent layer and the intermediate layer, and between the intermediate layer and the barrier absorbent layer.

10. The absorbent core according to any of claims 1-8, wherein superabsorbent material is arranged between the diffusion absorbent layer and the intermediate layer, and between the intermediate layer and the impermeable absorbent layer; or, between the diffusion absorption layer and the intermediate layer, the high water absorption resin is arranged between the intermediate layer and the seepage-proof absorption layer.

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