CN114081724A

CN114081724A - Disposable absorption core

Info

Publication number: CN114081724A
Application number: CN202111404404.3A
Authority: CN
Inventors: 荣育凤; 张燕燕; 田春兰; 崔象凯
Original assignee: Nuo Chen Co ltd
Current assignee: Nuo Chen Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-02-25

Abstract

The invention relates to a disposable absorption core body, which comprises an absorption core body and a coating layer, wherein the absorption core body sequentially comprises a waterproof layer, a water locking layer, a water guide layer and an absorption layer from top to bottom; the waterproof layer is made of PP wood pulp spunlace cloth and/or polyester wood pulp spunlace cloth; the water locking layer sequentially comprises a fluff pulp layer and a high water absorption resin layer from top to bottom; the water guide layer is composed of super absorbent resin and elastic spun-bonded non-woven fabric wrapping the super absorbent resin; the absorption layer sequentially comprises a first absorption layer, a second absorption layer and a third absorption layer from top to bottom, the first absorption layer is a super absorbent resin composite paper layer, the second absorption layer is a super absorbent resin layer, and the third absorption layer is at least one of a wet strength paper layer, a dust-free paper layer and a non-woven fabric layer. The absorption core body has the advantages of being light, thin, breathable, good in absorption, good in dryness, free of breakage and lump after being absorbed and the like.

Description

Disposable absorption core

Technical Field

The invention relates to the technical field of sanitary products, in particular to a disposable absorption core body.

Background

The disposable absorption article is a nursing sanitary article designed for infants, puerperae, middle-aged and elderly patients suffering from urinary incontinence and paralysis, greatly reduces the burden of nursing personnel due to convenient use and replacement, and rapidly occupies the market by virtue of the advantages of convenience, sanitation, comfort and the like.

The absorption core body of the disposable absorption article is the most important part of the disposable absorption article, and the conventional disposable absorption product adopting the wood pulp fiber core body has the defects of poor absorption and water locking performance, poor air permeability and the like, so that the requirements of the current consumers cannot be met. Therefore, improvements to the absorbent core of disposable absorbent articles have been one of the directions of development.

The absorption core body of the existing disposable absorption article has poor absorption effect, which is mainly characterized in that the core body has poor transverse and longitudinal diffusion and infiltration capacity; the core body usage rate is less than half, and the absorption core body is easy to break, lump and agglomerate after absorbing liquid. Poor absorption and diffusion effects can easily cause side leakage, back leakage, reverse osmosis, and other undesirable conditions. Causing the problems of 'red buttocks', 'diaper rash', 'eczema' and the like of the infants. The chinese patent application CN111772940A provides an absorbent core of a paper diaper, but the water-locking layer, the water-guiding layer and the absorbent layer all consist of a structure of wood pulp fiber mixed with super absorbent resin, so that the absorbent core can have good absorption rate and air permeability, but still has the problems of further improvement in absorption rate, dryness and diffusion rate.

Therefore, it is highly desirable to provide a new disposable absorbent core to solve the above problems.

Disclosure of Invention

In order to solve one or more technical problems of an absorption core body of an existing disposable absorption article, the invention provides a disposable absorption core body. The absorption core body is a disposable absorption core body which is light, thin, breathable, good in absorption and good in dryness, and cannot be broken or lump after being absorbed.

The invention provides a disposable absorption core body which comprises an absorption core body and a coating layer, wherein the absorption core body sequentially comprises a waterproof layer, a water locking layer, a water guide layer and an absorption layer from top to bottom; the waterproof layer is made of PP wood pulp spunlace cloth and/or polyester wood pulp spunlace cloth; the water locking layer sequentially comprises a fluff pulp layer and a high water absorption resin layer from top to bottom; the water guide layer is composed of high water absorption resin and elastic spun-bonded non-woven fabric wrapping the high water absorption resin; the absorption layer sequentially comprises a first absorption layer, a second absorption layer and a third absorption layer from top to bottom, the first absorption layer is a super absorbent resin composite paper layer, the second absorption layer is a super absorbent resin layer, and the third absorption layer is at least one of a wet strength paper layer, a dust-free paper layer and a non-woven fabric layer.

Preferably, the water barrier layer is located above the cladding layer.

Preferably, the coating layer covers the lower surface of the absorption layer, the coating layer extends upwards from two sides to form a wrapping part, and the wrapping part covers the lower surface of the water-resisting layer; or the coating covers the lower surface of the waterproof layer, the coating is formed into a folded part by downward extending of two sides, and the folded part covers the lower surface of the absorption layer.

Preferably, the folded portion has a space between both ends thereof.

Preferably, the coating layer includes an upper coating layer covering a lower surface of the water-blocking layer and a lower coating layer covering a lower surface of the absorption layer.

Preferably, the cover is made of a hydrophilic spunbonded nonwoven and/or a wet-strength paper.

Preferably, in the water barrier layer: the PP wood pulp spunlace fabric comprises PP and wood pulp, wherein the mass ratio of the PP to the wood pulp is (30-50): (70-50); the mass ratio of terylene contained in the terylene wood pulp spunlace fabric to wood pulp contained in the terylene wood pulp spunlace fabric is (40-50): (60-50).

Preferably, in the water-locking layer, the mass ratio of the fluff pulp layer to the high water absorption resin layer is (1-4): (3-5).

Preferably, at least one diversion trench is arranged in the water guide layer, the high water-absorbent resin is not distributed in the diversion trench, and the elastic spun-bonded non-woven fabric is bonded by hot melt adhesive to form the diversion trench.

Preferably, the diversion trench is arc-shaped and/or linear; the width of the diversion trench is 0.5-3.5 cm; the spacing distance between every two adjacent guide grooves is 1-3 cm.

Compared with the prior art, the invention at least has the following beneficial effects:

(1) according to the invention, by designing the absorption core body which sequentially comprises the water-resisting layer, the water-locking layer, the water-guiding layer and the absorption layer from top to bottom, the liquid absorption capacity of the disposable absorption article can be effectively increased when the disposable absorption article is inconvenient to replace at night or under special conditions, the skin is prevented from being soaked in urine or excrement liquid for a long time, rash and diaper rash are reduced, the phenomena of lumping and fault after the absorption core body of the traditional fluff pulp structure absorbs liquid are avoided, and the problems of large reverse osmosis and the like of the absorption core body due to the fact that the composite core body structure cannot conduct after absorbing liquid are avoided.

(2) The disposable absorbing core body is provided with the diversion trench in the water guide layer, which is obviously different from the diversion trench of the existing composite core body structure and the diversion trench of the traditional fluff pulp structure absorbing core body, the diversion trench of the traditional fluff pulp structure absorbing core body is formed by diversion press rollers, the diversion trench of the composite core body structure is formed by spraying glue on the dustless paper to press the dustless paper and the fluffy non-woven fabric into the diversion trench; the diversion trench in the diversion layer of the invention wraps the macromolecule by using the elastic spun-bonded non-woven fabric, and the diversion trench is formed by spraying the hot melt adhesive on the area of the elastic non-woven fabric corresponding to the diversion trench without the super absorbent resin, so that compared with the diversion trench of the composite core body structure, the problem of poor diversion effect caused by poor lamination or less glue spraying is solved.

(3) The water guide layer is formed by independently designing the super absorbent resin wrapped by the elastic non-woven fabric into a layer, so that the addition amount of the fluff pulp is reduced, the product is thin and light, and the phenomena of lumping and fault of the fluff pulp after the absorption core body of the traditional fluff pulp structure absorbs liquid can be effectively solved; the arrangement of the fluff pulp layer in the water locking layer can solve the problem that the absorption speed of the super absorbent resin is low in the early stage, the water locking layer can completely absorb water in the fluff pulp, even if the rest of the water can pass through the water guide layer, the absorption layer can keep liquid and does not reverse osmosis, the liquid can be quickly absorbed through the fluff pulp layer, then the super absorbent resin in the super absorbent resin layer wrapped by the elastic non-woven fabric can absorb the liquid in the fluff pulp, and meanwhile the liquid can be absorbed by the super absorbent resin through the fluff pulp.

(4) The invention has the advantages of simple use, easy operation, simple requirement on equipment, simple manufacturing process and easy implementation, and has good application prospect.

Drawings

The drawings of the present invention are provided for illustrative purposes only, and the proportion, size and number of parts in the drawings are not necessarily consistent with those of actual products.

Figure 1 is a schematic view of a disposable absorbent core according to some embodiments of the present invention.

In the figure: 1: a water barrier layer; 2: a water locking layer; 21: a fluff pulp layer; 22: a super absorbent resin layer; 3: a water guide layer; 4: an absorbing layer; 41: a first absorbent layer; 42: a second absorbent layer; 43: a third absorption layer; 5: a coating layer; 51: a wrapping and folding part.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The invention provides a disposable absorption core, for example, as shown in fig. 1, the disposable absorption core comprises an absorption core body and a coating layer 5, wherein the absorption core body sequentially comprises a waterproof layer 1, a water locking layer 2, a water guide layer 3 and an absorption layer 4 from top to bottom; the waterproof layer 1 is made of PP wood pulp spunlace cloth and/or terylene wood pulp spunlace cloth; the water locking layer 2 sequentially comprises a fluff pulp layer 21 and a high water absorption resin layer 22 from top to bottom; the water guide layer 3 is composed of super absorbent resin and elastic spun-bonded non-woven fabric wrapping the super absorbent resin; the absorbent layer 4 includes, in order from top to bottom, a first absorbent layer 41, a second absorbent layer 42, and a third absorbent layer 43, the first absorbent layer 41 is a super absorbent resin composite paper layer (also referred to as an SAPP composite paper layer), the second absorbent layer 42 is a super absorbent resin layer, and the third absorbent layer 43 is at least one of a wet strength paper layer, a dust-free paper layer, and a nonwoven fabric layer (e.g., a spunbond nonwoven fabric layer). The gram weights of the materials used for the coating layer and the third absorption layer, the elastic spun-bonded non-woven fabric of the water guide layer and the like are not particularly limited, and the conventional gram weight for sanitary absorption articles can be adopted; the total thickness of the primary absorbent core is also not particularly limited by the present invention, and conventional thicknesses of existing absorbent cores may also be used, for example.

The disposable absorption core body comprises a water-resisting layer, a water locking layer, a water guide layer and an absorption layer in sequence, liquid firstly passes through the water-resisting layer in the using process, and then is quickly absorbed and transferred to the water locking layer, so that the liquid is further conducted, absorbed and diffused in the water locking layer, passes through the water guide layer and is conducted to the absorption layer, the absorption layer serves as a main absorber and is used for storing the liquid without reverse osmosis, and finally the water-resisting layer plays a role in blocking the liquid when the absorption core body is stressed, and the reverse osmosis is obviously reduced.

Compared with the existing common absorption core body, the water-resisting layer is added, reverse osmosis can be obviously reduced, the water-locking layer, the water-guiding layer and the absorption layer in the invention are mutually coordinated, reverse osmosis is low after the absorption of the absorption core body is finished, and simultaneously, no lump or fault phenomenon of a fluff pulp structure occurs after a product absorbs liquid, and the problems of non-open conduction, large reverse osmosis and the like existing in the existing composite core body structure can be avoided.

In particular, in the present invention, the layers included in the disposable absorbent core may be bonded together in sequence by hot melt adhesive or pressed together by hot pressing, for example, and the peeled state of the covering layer from the absorbent core body shown in fig. 1 is merely to clearly illustrate the relationship between the absorbent core body and the covering layer; in the present invention, the super absorbent resin composite paper layer is preferably a wet-process super absorbent resin composite paper layer made of wet-process super absorbent resin composite paper, the wet-process super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two raw paper layers by using a conventional wet-process paper making process, and the grammage of the wet-process super absorbent resin composite paper layer may be, for example, 60 to 80g/m²(ii) a In the present invention, the wet paper-making process can be, for example, the wet paper-making process disclosed in chinese patent application CN 201710966882.0.

According to some preferred embodiments, the covering layer 5 covers the lower surface of the absorbent layer 4, the covering layer 5 extends upwards from two sides to form folded portions 51, and the folded portions 51 cover the lower surface of the water-barrier layer 1, as shown in fig. 1, for example, so that the reverse osmosis of the absorbent core can be effectively reduced, and the surface dryness of the absorbent core can be improved.

According to some preferred embodiments, the coating layer 5 covers the lower surface of the water-resisting layer 1, the coating layer 5 extends downwards from two sides to form folded parts 51, and the folded parts 51 cover the lower surface of the absorption layer 4, so that the reverse osmosis of the absorption core body can be effectively reduced, and the surface dryness of the absorption core body is improved.

According to some preferred embodiments, the folded portion 51 has a space between both ends thereof, for example, as shown in fig. 1, the folded portion 51 has a space between the left and right ends thereof; the formation of the interval can obviously increase the liquid infiltration speed of the absorption core body, so that the absorption core body has the advantages of high infiltration speed, good liquid absorption capacity and no top fault, and can ensure that the absorption core body has good air permeability; in some specific embodiments, the width of the gap is, for example, 0.2 to 0.8 of the width of the water barrier layer 1.

According to some preferred embodiments, the coating layer 5 includes an upper coating layer covering the lower surface of the water-blocking layer 1 and a lower coating layer covering the lower surface of the absorption layer 4.

According to some preferred embodiments, the cover layer 5 is made of hydrophilic spunbonded nonwoven and/or wet-strength paper.

According to some preferred embodiments, the water barrier layer 1 is made of a layer of PP wood pulp spunlace or a layer of polyester wood pulp spunlace.

According to some preferred embodiments, in the water barrier layer 1: the PP wood pulp spunlace fabric comprises PP (polypropylene fibers) and wood pulp (wood pulp fibers)) in a mass ratio of (30-50): (70-50) (e.g., 30:70, 35:65, 40:60, 45:55, or 50: 50); the mass ratio of terylene (polyester fiber) contained in the terylene wood pulp spunlace fabric to wood pulp (wood pulp fiber) contained in the terylene wood pulp spunlace fabric is (40-50): (60-50) (e.g., 40:60, 45:55, or 50: 50); in the invention, the reverse osmosis of the absorbent core body can be effectively reduced only by the water-resisting layer formed by matching wood pulp fibers with the polypropylene fibers and/or the polyester fibers, and the dryness performance of the absorbent core body is effectively improved; in the invention, the preferable mass ratio of PP contained in the PP wood pulp spunlace fabric to wood pulp contained in the PP wood pulp spunlace fabric is (30-50): (70-50), wherein the mass ratio of terylene contained in the terylene wood pulp spunlace fabric to wood pulp contained in the terylene wood pulp spunlace fabric is (40-50): (60-50), so more be favorable to obtaining the disposable absorbent core that the reverse osmosis is lower, in this preferred scope, the wood pulp content is higher, it is better to reduce the effect of reverse osmosis, and if the wood pulp content is too high, the gram weight of the material is high, will increase a lot of costs on the one hand, on the other hand reduce the effect of reverse osmosis but also not outstanding; in the present invention, and preferably, in the water-barrier layer 1, the addition amount of the PP is not less than 10g/m²Or the addition amount of the terylene is not less than 18g/m²。

According to some preferred embodiments, the basis weight of the PP wood pulp spunlace fabric and/or the terylene wood pulp spunlace fabric is 33-80 g/m²。

According to some preferred embodiments, in the water-holding layer 2, the mass ratio of the fluff pulp layer 21 to the super absorbent resin layer 22 is (1-4): (3-5) (e.g., 1:3, 1:4, 1:5, 2:3, 2:4, 2:5, 3:3, 3:4, 3:5, 4:3, or 4: 5); in some specific embodiments of the present invention, for example, the water-retaining layer 2 is a mixture of super absorbent resin and fluff pulp structure, wherein the upper layer is a thin fluff pulp layer with a mass of 1-4 g, the lower layer is a super absorbent resin layer, and the addition amount of the super absorbent resin is 3-5 g; the invention has no special requirement on the adopted super absorbent resin, and the super absorbent resin commonly used for sanitary absorbent articles is adopted uniformly; in the present invention, for example, the liquid retention amount of the super absorbent resin used in the super absorbent resin layer 22 is more than 30g/g, the liquid permeability of the super absorbent resin is more than 30mL/min, and the particle size distribution range of the super absorbent resin is 25 to 50 mesh.

The present invention has no particular requirements on the performance of the super absorbent resin used in the disposable absorbent core, and in some specific embodiments, for example, the liquid retention capacity of the super absorbent resin used in the water-guiding layer 3 is greater than 28g/g, the liquid passing capacity of the super absorbent resin is greater than 30mL/min, and the particle size distribution range of the super absorbent resin is 25-50 meshes; in some specific embodiments, such as in the absorbent layer 4, the grammage of the second absorbent layer 42 (superabsorbent resin layer) is 50-200g/m²The liquid retention capacity of the super absorbent resin is more than 31g/g, the liquid passing capacity of the super absorbent resin is more than 10mL/min, and the particle size distribution range of the super absorbent resin is 25-80 meshes.

According to some preferred embodiments, at least one diversion trench is arranged in the water guide layer 3, the high water-absorbent resin is not distributed in the diversion trench, and the elastic spun-bonded non-woven fabric is bonded by hot melt adhesive to form the diversion trench; in the present invention, specifically, the guide groove is formed as follows: and spraying hot melt adhesive in an area where the elastic non-woven fabric correspondingly forms the diversion trench without adding super absorbent resin, and forming the diversion trench by bonding the hot melt adhesive.

According to some preferred embodiments, the shape of the flow guide groove is arc-shaped and/or linear; the width of the diversion trench is 0.5-3.5 cm (for example, 0.5, 1, 1.5, 2, 2.5, 3 or 3.5 cm); the spacing distance between every two adjacent guide grooves is 1-3 cm (such as 1, 1.5, 2, 2.5 or 3 cm); in the present invention, the length of the guide groove may be, for example, 60 to 100% of the length of the water guide layer 3.

According to some preferred embodiments, the coating layer 5 covers the lower surface of the absorption layer 4, the coating layer 5 extends upwards from two sides to form a folded part 51, and the folded part 51 covers the lower surface of the water-resisting layer 1; the waterproof layer 1, the coating layer 5, the water locking layer 2, the water guide layer 3 and the absorption layer 4 are bonded together through hot melt adhesive or are thermally pressed together.

The present invention is not particularly limited in size of each layer included in the disposable absorbent core, and in some preferred embodiments, when the disposable absorbent core is used in an absorbent article such as a diaper, the water-barrier layer and the water-lock layer have the same size as the whole width of the disposable absorbent core, the front end of the water-guide layer is 1 to 7cm, preferably 3 to 5cm, from the front waistline of the disposable absorbent core, the rear end of the water-guide layer is 1 to 5cm, preferably 2 to 3cm, from the rear buttocks of the disposable absorbent core, the width of the water-guide layer is 10 to 20%, preferably 15%, narrower than the whole width of the disposable absorbent core, and/or the front end of the absorbent layer is 1 to 5cm, preferably 1 to 3cm, from the front waistline of the disposable absorbent core, and the rear end of the absorbent layer is 1 to 3cm, from the rear buttocks of the disposable absorbent core, preferably 1-2 cm. In the present invention, "front end" and "rear end" refer to both front and rear ends in the longitudinal direction.

The present invention will be further described with reference to the following examples. These examples are merely illustrative of preferred embodiments of the present invention and the scope of the present invention should not be construed as being limited to these examples.

Example 1

A disposable absorption core body comprises an absorption core body and a coating layerThe absorption core body sequentially comprises a water-resisting layer, a water-locking layer, a water guide layer and an absorption layer from top to bottom; the coating layer covers the lower surface of the absorption layer, two sides of the coating layer extend upwards to form a wrapping and folding part, the wrapping and folding part covers the lower surface of the waterproof layer, a gap is formed between two ends of the wrapping and folding part, the width of the gap accounts for 0.5 of the width of the waterproof layer, and the coating layer is made of wet strength paper; the waterproof layer is made of a layer of PP wood pulp spunlace cloth, and the gram weight of the PP wood pulp spunlace cloth (the weight ratio of the components is 35:65) is 50g/m²(ii) a The water locking layer sequentially comprises a fluff pulp layer (the addition amount is 2.5g) and a high water absorption resin layer (the addition amount is 3.5g) from top to bottom; the water guide layer is composed of super absorbent resin and elastic spun-bonded non-woven fabric wrapping the super absorbent resin, wherein the addition amount of the super absorbent resin is 50g/m²A diversion trench (linear diversion trench) is arranged in the water guide layer, the width of the diversion trench is 2.5cm, and the length of the diversion trench is the same as that of the water guide layer; the flow guide grooves are not distributed with super absorbent resin, and the elastic spun-bonded non-woven fabric is bonded by hot melt adhesive to form the flow guide grooves; the absorption layer sequentially comprises a wet-process super absorbent resin composite paper layer (the gram weight is 70 g/m) from top to bottom²) A super absorbent resin layer (gram weight 200 g/m)²) And a spunbond nonwoven layer.

Example 2

Example 2 is essentially the same as example 1, except that:

the disposable absorbent core in this embodiment does not include the water barrier.

Example 3

Example 3 is essentially the same as example 1, except that:

the disposable absorption core in the embodiment comprises a water guide layer without a guide groove, wherein the water guide layer is of a three-layer composite core structure and sequentially comprises a dust-free paper layer and a high water absorbent resin layer (with a gram weight of 300 g/m) from top to bottom²) And a hot air non-woven fabric layer.

Example 4

Example 4 is essentially the same as example 1, except that:

the waterproof layer is made of a layer of polyester wood pulp spunlace fabric, and the gram weight of the polyester wood pulp spunlace fabric (the weight ratio of components is 50:50) is 50g/m²。

Example 5

Example 5 is essentially the same as example 1, except that:

the waterproof layer is made of a layer of PP wood pulp spunlace cloth, and the gram weight of the PP wood pulp spunlace cloth (the weight ratio of the components is 50:50) is 50g/m²。

Example 6

Example 6 is essentially the same as example 1, except that:

the waterproof layer is made of a layer of PP wood pulp spunlace fabric, wherein the gram weight of the PP wood pulp spunlace fabric (the weight ratio of components is 70:30) is 50g/m²。

Example 7

Example 7 is essentially the same as example 1, except that:

the waterproof layer is made of a layer of wood pulp spunlace fabric, and the gram weight of the wood pulp spunlace fabric is 50g/m²。

Comparative example 1

The disposable absorbent core of the present comparative example comprises a first absorbent layer and a second absorbent layer, the first absorbent layer being smaller in size than the second absorbent layer, the first absorbent layer having a length, width and thickness that are each smaller than the corresponding length, width and thickness of the second absorbent layer; the first absorption layer is formed by mixing fluff pulp and super absorbent resin, wherein the fluff pulp accounts for 30% of the dosage of the fluff pulp in the whole absorption core body, the dosage is 4g, and the super absorbent resin accounts for 60% of the dosage of the super absorbent resin in the whole absorption core body, and the dosage is 6 g; the second absorption layer is formed by mixing fluff pulp and super absorbent resin, wherein the fluff pulp accounts for 70% of the dosage of the fluff pulp in the whole absorption core body, the dosage is 9.3g, and the super absorbent resin accounts for 40% of the dosage of the super absorbent resin in the whole absorption core body, and the dosage is 4 g.

Comparative example 2

Comparative exampleThe disposable absorption core body in the disposable absorption core body is a composite absorption core body with a five-layer structure, and sequentially comprises a dust-free paper layer, a super absorbent resin layer, a fluffy non-woven fabric layer, a super absorbent resin layer and a dust-free paper layer from top to bottom, wherein the gram weight of each layer of super absorbent resin is 300g/m²。

Comparative example 3

The disposable absorbent core of this comparative example was made by mixing fluff pulp with superabsorbent resin, wherein the fluff pulp was used in an amount of 12g and superabsorbent resin was used in an amount of 9 g.

Comparative example 4

The disposable absorption core comprises an absorption core body and a coating layer, wherein the absorption core body sequentially comprises a water locking layer, a first wood pulp fiber layer, a water guide layer, a second wood pulp fiber layer and an absorption layer from top to bottom, and the water locking layer, the water guide layer and the absorption layer are all formed by mixing wood pulp fiber with high-water-absorption resin (the mass ratio of the wood pulp fiber to the high-water-absorption resin is 4: 3); the coating layer comprises an upper coating layer and a lower coating layer, the upper coating layer is arranged above the water locking layer, the lower coating layer is arranged below the absorption layer, and the upper coating layer and the lower coating layer are both made of wet strength paper; the thickness of lock water layer does absorb 20% of core body thickness, the thickness of water guide layer does absorb 35% of core body thickness, the thickness of absorbed layer does absorb 40% of core body thickness, first wood pulp fiber layer with the thickness on second wood pulp fiber layer is absorb 2.5% of core body thickness.

Comparative example 5

Comparative example 5 is substantially the same as example 1 except that:

the coating covers the lower surface of absorbed layer, the coating upwards extends by both sides and forms package folding portion, package folding portion cover in the upper surface of water barrier, the interval has between the both ends of package folding portion, spaced width accounts for 0.5 of the width of water barrier, the coating adopts wet strength paper to make.

The disposable absorbent cores of examples 1-7 and comparative examples 1-5 were subjected to performance testing, and the results of the performance testing are shown in table 1.

The test method comprises the following steps: adding liquid into the metal ring by using a funnel, taking 80mL three parts of 0.9% saline, adding liquid at 0min, 10min and 35min respectively, and recording the time for completing absorption each time as the absorption speed in unit s; recording the diffusion length of the saline on the lower surface of the disposable absorption core body in cm after 0.9 percent of saline is absorbed each time; after adding the solution for 5min, the reverse osmosis is measured by applying a pressure of 3.5kg and a pressure of 3min with filter paper, the temperature of 0.9% saline is 25 ℃, and the unit g is measured.

Table 1: the performance indexes of the disposable absorbent cores of examples 1 to 7 and comparative examples 1 to 5.

From the results in table 1, it can be seen that the absorption speed of examples 1-2 and comparative example 5 is significantly faster than that of other products, which is related to the absorbent core structures of examples 1-2 and comparative example 5, the water-locking layer, the water-guiding layer and the absorbent layer arranged in the absorbent core are matched with each other, and the water-guiding grooves arranged in the water-guiding layer can significantly accelerate the liquid infiltration and increase the absorption speed of the absorbent core.

The invention has not been described in detail in order to avoid obscuring the invention, and it is well known to those skilled in the art that such may be routinely selected based on actual needs or particular circumstances.

It is to be expressly understood that in the present application, the terms "upper", "lower", etc., indicate an orientation or positional relationship based on that shown in fig. 1, which is for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referenced components must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A disposable absorption core body comprises an absorption core body and a coating layer, and is characterized in that:

the absorption core body sequentially comprises a waterproof layer, a water locking layer, a water guide layer and an absorption layer from top to bottom;

the waterproof layer is made of PP wood pulp spunlace cloth and/or polyester wood pulp spunlace cloth;

the water locking layer sequentially comprises a fluff pulp layer and a high water absorption resin layer from top to bottom;

the water guide layer is composed of high water absorption resin and elastic spun-bonded non-woven fabric wrapping the high water absorption resin;

the absorption layer sequentially comprises a first absorption layer, a second absorption layer and a third absorption layer from top to bottom, the first absorption layer is a super absorbent resin composite paper layer, the second absorption layer is a super absorbent resin layer, and the third absorption layer is at least one of a wet strength paper layer, a dust-free paper layer and a non-woven fabric layer.

2. The disposable absorbent core according to claim 1, wherein:

the water-resisting layer is located above the coating layer.

3. The disposable absorbent core according to claim 1, wherein:

the coating layer covers the lower surface of the absorption layer, the coating layer extends upwards from two sides to form a wrapping part, and the wrapping part covers the lower surface of the waterproof layer; or

The coating covers the lower surface of water barrier, the coating is by both sides downwardly extending formation package turn-ups portion, package turn-ups portion cover in the lower surface of absorbed layer.

4. The disposable absorbent core according to claim 3, wherein:

and a space is arranged between the two ends of the folding part.

5. The disposable absorbent core according to claim 1, wherein:

the coating layer comprises an upper coating layer covering the lower surface of the water-resisting layer and a lower coating layer covering the lower surface of the absorbing layer.

6. The disposable absorbent core according to any one of claims 1 to 5, characterized in that:

the coating is made of hydrophilic spun-bonded non-woven fabric and/or wet-strength paper.

7. The disposable absorbent core according to any of claims 1 to 5, wherein in the water barrier:

the PP wood pulp spunlace fabric comprises PP and wood pulp, wherein the mass ratio of the PP to the wood pulp is (30-50): (70-50);

the mass ratio of terylene contained in the terylene wood pulp spunlace fabric to wood pulp contained in the terylene wood pulp spunlace fabric is (40-50): (60-50).

8. The disposable absorbent core according to any one of claims 1 to 5, characterized in that:

in the water-retaining layer, the mass ratio of the fluff pulp layer to the high water-absorbing resin layer is (1-4): (3-5).

9. The disposable absorbent core according to any one of claims 1 to 5, characterized in that:

set up at least one guiding gutter in the water conservancy diversion layer, not distribute super absorbent resin in the guiding gutter, the elasticity is spun-bonded the non-woven fabrics and is formed the guiding gutter through the hot melt adhesive bonding.

10. The disposable absorbent core according to claim 9, wherein:

the diversion trench is arc-shaped and/or linear;

the width of the diversion trench is 0.5-3.5 cm;

the spacing distance between every two adjacent guide grooves is 1-3 cm.