CN112603663A - Composite absorption structure - Google Patents

Composite absorption structure Download PDF

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Publication number
CN112603663A
CN112603663A CN202011509473.6A CN202011509473A CN112603663A CN 112603663 A CN112603663 A CN 112603663A CN 202011509473 A CN202011509473 A CN 202011509473A CN 112603663 A CN112603663 A CN 112603663A
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China
Prior art keywords
absorbent resin
super absorbent
layer
composite
paper
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CN202011509473.6A
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Chinese (zh)
Inventor
荣敏杰
李长泳
田春兰
许永升
于庆华
荣帅帅
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Nuo Chen Co.,Ltd.
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Shandong Luyue Sanitary Products Co ltd
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Priority to CN202011509473.6A priority Critical patent/CN112603663A/en
Publication of CN112603663A publication Critical patent/CN112603663A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
    • A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
    • A61F13/53713—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15463—Absorbency
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
    • A61F2013/15544—Permeability
    • A61F2013/15552—Air permeability
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

本发明涉及一种复合吸收结构，所述复合吸收结构包括芯体结构，所述芯体结构自上而下依次包括表层、第一高吸水树脂层、中间层、第二高吸水树脂层和底层；所述表层由高吸水树脂复合纸制成；所述芯体结构上设置有至少一条从所述表层贯穿至所述底层的导流凹槽，所述导流凹槽内填充有由绒毛浆和高吸水树脂混合而成的吸收材料。本发明中的复合吸收结构，最突出的特点是表面干爽性好、透气性好、吸收量大、吸收速度快、更加柔软，该结构适用于作为纸尿裤、卫生巾、成裤等卫生用品的吸收芯体，尤其适用于作为尿裤的吸收芯体。

Figure 202011509473

The present invention relates to a composite absorbent structure. The composite absorbent structure includes a core structure. The core structure includes a surface layer, a first superabsorbent resin layer, a middle layer, a second superabsorbent resin layer and a bottom layer in order from top to bottom. ; the surface layer is made of superabsorbent resin composite paper; the core structure is provided with at least one diversion groove penetrating from the surface layer to the bottom layer, and the diversion groove is filled with fluff pulp Absorbent material mixed with superabsorbent resin. The composite absorption structure in the present invention has the most prominent features of good surface dryness, good air permeability, large absorption capacity, fast absorption speed, and more softness. The core is particularly useful as an absorbent core for diapers.

Figure 202011509473

Description

Composite absorption structure
Technical Field
The invention belongs to the technical field of absorption cores, and particularly relates to a composite absorption structure.
Background
Common disposable absorbent articles in the market at present comprise baby diapers, sanitary napkins of female sanitary products, adult incontinence products, adult pants and the like. The absorbent core of such disposable absorbent articles has mostly a similar structure: one is a core structure and the other is a fluff pulp structure. The advantages and the disadvantages of the two structures are very obvious, the core body structure has good dryness and stability, and the product is ultrathin but has poorer air permeability; the fluff pulp structure has good air permeability, but the absorbent body has poor stability and poor dryness.
However, no absorbent core structure has been reported that can combine the advantages of both structures.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a composite absorption structure. The invention aims to improve the absorption capacity of the absorption core body by improving the structure of the absorption core body, so that the downward-permeated liquid is quickly absorbed by the core body, the air permeability of the core body is increased, and the dryness and the stability of the core body can be ensured. The composite absorption structure is a novel absorption structure with good surface dryness, high absorption speed, good air permeability and softness.
The invention provides a composite absorption structure, which comprises a core body structure, wherein the core body structure sequentially comprises a surface layer, a first high-water-absorption resin layer, a middle layer, a second high-water-absorption resin layer and a bottom layer from top to bottom; the surface layer is made of super absorbent resin composite paper; the core body structure is provided with at least one flow guide groove penetrating from the surface layer to the bottom layer, and the flow guide groove is filled with an absorption material formed by mixing fluff pulp and super absorbent resin.
Preferably, the shape of the diversion groove is strip-shaped or oval.
Preferably, the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through wet papermaking, and each layer of the super absorbent resin composite paper is composed of two raw paper layers and a super absorbent resin layer sandwiched between the two raw paper layers.
Preferably, the gram weight of the super absorbent resin composite paper is 50-200 g/m2。
Preferably, the gram weight of the first high water absorbent resin layer and/or the second high water absorbent resin layer is 30-200 g/m2。
Preferably, the mesh number of the super absorbent resin in which the mesh number of the super absorbent resin contained in the first super absorbent resin layer is 70% or more is distributed in the range of 25 to 50 meshes; and/or the mesh number of the super absorbent resin in which the mesh number of the super absorbent resin contained in the second super absorbent resin layer is 80% or more is distributed in the range of 35 to 80 mesh.
Preferably, the intermediate layer is made of a bulky nonwoven fabric.
Preferably, the bottom layer is made of non-woven fabric or dust-free paper.
Preferably, the nonwoven fabric is a through-air nonwoven fabric, a spunbond nonwoven fabric or a spunlace nonwoven fabric.
Preferably, the gram weight of the non-woven fabric is 8-50 g/m2(ii) a And/or
The gram weight of the dust-free paper is 20-60 g/m2。
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a composite absorption structure, wherein the surface layer of a core body structure in the composite absorption structure is made of super absorbent resin composite paper, and the super absorbent resin composite paper contains super absorbent resin and has the capability of absorbing liquid, so that residual moisture on the surface can be completely treated, and the surface is ensured to be dry and comfortable.
(2) The invention breaks through the convention, and according to the advantages of good conductivity, good air permeability and the like of the fiber of the fluff pulp, the flow guide groove is embedded in the core body structure of the composite absorption structure and is filled with the fluff pulp as flow guide, the core body structure can quickly conduct away liquid after absorbing the liquid by utilizing the characteristic of good conductivity of the fluff pulp, the air permeability of the core body structure is good under the action of the fluff pulp, and a certain amount of super absorbent resin is mixed in the fluff pulp to absorb the residual moisture in the fluff pulp and improve the integral dryness and comfort of the core body structure.
(3) The composite absorption structure has the most prominent characteristics of good surface dryness, good air permeability, large absorption capacity, high absorption speed and higher softness, and is suitable for being used as an absorption core body of sanitary products such as paper diapers, sanitary towels, adult pants and the like, particularly suitable for being used as the absorption core body of the paper diapers.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the proportions of the respective parts in the drawings are not necessarily in accordance with actual products.
FIG. 1 is a schematic cross-sectional structure view of a composite absorbent structure in accordance with an embodiment of the present invention.
Fig. 2 is a schematic distribution diagram of the flow guiding grooves provided in the core structure in embodiment 1 of the present invention.
Fig. 3 is a schematic distribution diagram of the flow guiding grooves provided in the core structure in embodiment 2 of the present invention.
In the figure: 1: a surface layer; 11: a raw paper layer; 12: a super absorbent resin layer; 2: a first superabsorbent resin layer; 3: an intermediate layer; 4: a second superabsorbent resin layer; 5: a bottom layer; 6: a flow guide groove; 61: fluff pulp; 62: a super absorbent resin.
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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 composite absorption structure, which is a multi-layer structure and comprises a core body structure; for example, as shown in fig. 1, the core structure comprises a surface layer 1, a first high water absorbent resin layer 2, a middle layer 3, a second high water absorbent resin layer 4 and a bottom layer 5 in sequence from top to bottom; the surface layer 1 is made of high water absorbent resin composite paper, and the surface layer 1, the first high water absorbent resin layer 2, the middle layer 3, the second high water absorbent resin layer 4 and the bottom layer 5 are sequentially paved from top to bottom to form a frame (core body structure) of the composite absorption structure; the core body structure is provided with at least one flow guide groove 6 penetrating from the surface layer 1 to the bottom layer 5, the flow guide groove 6 penetrates from the upper surface of the surface layer 1 to the lower surface of the bottom layer 5, for example, and the flow guide groove 6 is filled with an absorption material formed by mixing fluff pulp 61 and super absorbent resin 62; in the invention, the diversion groove 6 is formed by cutting the first layer to the fifth layer of the core structure, the first layer to the fifth layer of the core structure are cut from top to bottom, and the diversion groove 6 is of a straight-in groove-shaped structure. In the invention, the flow guide groove 6 is filled with a mixture of fluff pulp fibers with flow guide effect and super absorbent resin with absorption function, which can effectively conduct liquid, increase the air permeability of the core body and ensure the dryness of the core body structure, and the filling amount is suitable for the volume of the flow guide groove 6; in the invention, the diversion groove 6 is filled with the fluff pulp, the fluff pulp board has longer fibers and the fibers have good strength, when the fluff pulp product is produced, the fluff pulp board is easy to be dissociated into single fibers on a fluff raising machine, and the dust generated during the processing of fluff is less; the fluff pulp has good water absorption and rapid diffusion; the fluff pulp has high fiber whiteness, soft fiber, certain elasticity, better core cushion integrity and accordance with the specified sanitary index, the production raw materials are needle wood, broad leaf wood, non-wood fiber and the like, and meanwhile, the fluff pulp has loose fiber and good air permeability; in some preferred embodiments, the fluff pulp employed is wood pulp.
In the invention, the surface layer 1 is the surface layer of the super absorbent resin composite paper made of the super absorbent resin composite paper, so that the infiltration liquid can quickly infiltrate into the core body at the lower layer, the residual moisture on the surface can be absorbed, and the dryness of the surface layer is ensured; the first super absorbent resin layer 2 can absorb part of the penetrated liquid and conduct the residual unabsorbed liquid to the lower layer, so that the absorbed liquid can be firmly locked in the super absorbent resin, and the dryness of the upper layer (namely the surface layer) of the super absorbent resin layer is ensured; the middle layer is preferably a fluffy non-woven fabric layer made of fluffy non-woven fabrics, is positioned between the two high water-absorbent resin layers, can play a role in fixing the upper and lower high water-absorbent resins, plays a role in conducting liquid and increasing the bulkiness of the core body, and the first high water-absorbent resin layer 2 and the second high water-absorbent resin layer 4 are uniformly laid on the upper and lower surfaces of the fluffy non-woven fabric layer; the second super absorbent resin layer 4 is capable of absorbing the upper layer of unabsorbed liquid; the bottom layer 5 can be made of different materials according to the actual requirements on the overall softness, thickness and the like of the core structure, for example, the bottom layer is made of dust-free paper, hot air non-woven fabric, spun-bonded non-woven fabric, spunlace non-woven fabric and the like, and the function of fixing the second super absorbent resin layer 4 is achieved.
The core structure breaks through the conventional principle, the flow guide groove 6 is cut from top to bottom, fluff pulp 61 with absorption and flow guide effects (conduction capacity) and super absorbent resin 62 with absorption functions and water retention capacity are arranged in the flow guide groove 6, the core structure can quickly conduct away liquid after absorbing liquid by utilizing the characteristic of good conductivity of the fluff pulp, the air permeability of the core structure is good under the action of the fluff pulp, a certain amount of super absorbent resin is mixed in the fluff pulp to absorb residual moisture in the fluff pulp, the dryness of the surface of the flow guide groove is ensured, and the integral dryness of the core structure is improved; in the invention, the air permeability of the flow guide groove 6 is good and is also marked as an air permeability flow guide groove; the ventilating and flow guiding groove is of a groove-shaped structure penetrating through the whole core body structure, and plays a role in flow guiding and ventilating.
The composite absorption structure is a novel absorption structure with good surface dryness, high absorption speed, good air permeability and softness, solves the problem of poor air permeability of a single core body structure or the problems of poor dryness, low absorption speed and poor stability of a single fluff pulp structure in the prior art, and realizes the comprehensive embodiment of the advantages of the two structures.
According to some preferred embodiments, the mass ratio of the fluff pulp 61 to the super absorbent resin 62 filled in the flow guide grooves 6 is (0.5-2: 1) (e.g. 0.5:1, 0.8:1, 1:1, 1.5:1 or 2: 1). In some preferred embodiments of the present invention, the particle size of the super absorbent resin filled in the flow guide groove 6 is 25 to 50 mesh, and the gram weight is 100 to 300g/m2。
According to some preferred embodiments, the shape of the flow guide groove 6 is a strip (long bar) or an ellipse (oval), and the shape of the flow guide groove 6 refers to a sectional shape along the length direction of the core structure, for example, as shown in fig. 2 and 3; the flow guide grooves 6 are integrally embedded in the core body structure, and the number of the flow guide grooves 6 can be one or more (two or more); when the number of the flow guide grooves 6 is one, the flow guide grooves 6 are arranged in the middle of the width of the core body structure, and when the number of the flow guide grooves 6 is multiple, the flow guide grooves 6 are uniformly distributed in the core body structure; the width of the flow guide groove 6 is not particularly limited, and for example, the width of the flow guide groove 6 can be freely adjusted according to the number of the flow guide grooves 6 and the width of the core body structure; in the invention, the width of the core body structure can be 8-15 cm, and the width of the flow guide groove 6 can be 0.5-4 cm.
According to some preferred embodiments, the super absorbent resin composite paper is a super absorbent resin composite paper formed by uniformly distributing super absorbent resin between two raw paper layers 11 made of wood pulp by wet papermaking, each of which is composed of two raw paper layers 11 and a super absorbent resin layer 12 sandwiched between the two raw paper layers 11, for example, as shown in fig. 1; in some preferred embodiments of the present invention, the particle size of the super absorbent resin in the super absorbent resin composite paper is 30 to 100 mesh, and the gram weight is 100 to 300g/m2。
In the present invention, the wet papermaking process disclosed in chinese patent application CN201710966882.0 may be adopted, for example, and the specific forming process may be: (1) respectively carrying out net-surfing molding on the surface sizing agent and the bottom sizing agent to prepare wet surface layer base paper and wet bottom layer base paper; the relative water content of the wet surface layer base paper and the wet bottom layer base paper is 50-80%; (2) respectively spraying the wet surface layer base paper and the wet bottom layer base paper prepared in the step (1) with super absorbent resin, and compounding the wet surface layer base paper and the wet bottom layer base paper which are respectively sprayed with the super absorbent resin to prepare wet raw paper; (3) and (3) sequentially squeezing and drying the wet raw paper sheet prepared in the step (2) to prepare the super absorbent resin composite paper.
In some preferred embodiments of the present invention, the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through wet papermaking, and the super absorbent resin is added into the super absorbent resin composite paper formed in the wet papermaking manner at the early stage of forming the wood pulp paper layer, and since the super absorbent resin is compounded with paper fibers at the early stage of forming the paper, the super absorbent resin is completely embedded in the paper fibers, the contact area between the super absorbent resin and the fibers is greatly increased, and the conductivity of the paper fibers and the super absorbent resin to liquid is also enhanced, so that the liquid absorption capacity and the liquid absorption speed of the super absorbent resin composite paper obtained by forming are greatly increased.
According to some preferred embodiments, the grammage of the super absorbent resin composite paper is 50 to 200g/m2。
According to some preferred embodiments, the grammage of the first and/or second superabsorbent resin layer 2, 4 is 30-200 g/m2。
According to some preferred embodiments, the mesh number of the super absorbent resin in which the mesh number of the super absorbent resin contained in the first super absorbent resin layer is 70% or more is distributed in the range of 25 to 50 mesh, that is, D of the super absorbent resin in the first super absorbent resin layer 27025-50 meshes; and/or the second super absorbent resin layer has a mesh number distribution of 35 to 80 mesh, that is, D is the number of meshes of the super absorbent resin in the second super absorbent resin layer 4, wherein the mesh number of the super absorbent resin in which the mesh number of the super absorbent resin in the second super absorbent resin layer is 80% or more80Is 35 to 80 mesh. In the present invention, it is preferable that the first height isThe water-absorbent resin layer 2 is made of super absorbent resin particles with relatively large particle size, the particle size distribution range is concentrated in 25-50 meshes, and D of the super absorbent resin70The particle size of the super absorbent resin particles is 25-50 meshes, namely more than 70% of the super absorbent resin particles are in the range of 25 meshes to 50 meshes or any sub-range of the super absorbent resin particles, so that liquid can be quickly transmitted to a lower layer, the residual liquid can be absorbed, and the dryness and the smoothness of the surface of the core body structure are guaranteed; and preferably, the second super absorbent resin layer 4 is formed by selecting super absorbent resin particles with fine particle size and close arrangement, the particle size distribution range is concentrated in 35-80 meshes, wherein D of the super absorbent resin is80The particle size of the super absorbent resin particles is 35-80 meshes, namely more than 80% of the super absorbent resin particles are in the range from 35 meshes to 80 meshes or any sub-range of the super absorbent resin particles, so that redundant liquid conducted from the upper layer to the lower layer can be better absorbed into the super absorbent resin particles, the liquid is completely absorbed, and the phenomenon of liquid leakage is avoided.
According to some preferred embodiments, the intermediate layer 3 is made of a bulky nonwoven fabric, i.e. the intermediate layer 3 is a bulky nonwoven fabric layer; preferably, the fiber denier of the fibers selected for the fluffy non-woven fabric layer is 2-6 denier, and the gram weight of the fluffy non-woven fabric layer is 25-60 g/m2。
According to some preferred embodiments, the bottom layer 5 is made of non-woven fabric or dust-free paper.
According to some preferred embodiments, the nonwoven is a through-air nonwoven, a spunbond nonwoven or a spunlace nonwoven.
According to some preferred embodiments, the nonwoven fabric has a grammage of 8 to 50g/m2(ii) a And/or the gram weight of the dust-free paper is 20-60 g/m2。
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 composite absorbent structure comprising a core structure, comprising in order from top to bottom:
surface layer 1, gram weight 80g/m2Wherein, the surface layer 1 is made of a layer of super absorbent resin composite paper, and the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two layers of raw paper layers made of wood pulp through wet papermaking;
a first super absorbent resin layer 2 with a grammage of 150g/m2D of the contained super absorbent resin particles7025-50 meshes;
middle layer 3 (fluffy non-woven fabric layer) with gram weight of 40g/m2；
A second super absorbent resin layer 4 with a grammage of 150g/m2D of the contained super absorbent resin particles8035-80 meshes;
bottom layer 5 (dust-free paper layer) with a gram weight of 40g/m2；
As shown in fig. 2, an elliptical flow guide groove 6 penetrating from the surface layer 1 to the bottom layer 5 is formed in the core structure, and an absorbent material formed by mixing fluff pulp and super absorbent resin is filled in the flow guide groove 6; the mass ratio of the fluff pulp to the super absorbent resin filled in the flow guide groove 6 is 1: 1.
Example 2
A composite absorbent structure comprising a core structure, as shown in figure 1, comprising in sequence from top to bottom:
surface layer 1, gram weight 100g/m2Wherein, the surface layer 1 is made of a layer of super absorbent resin composite paper, and the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two layers of raw paper layers made of wood pulp through wet papermaking;
a first super absorbent resin layer 2 with a grammage of 160g/m2D of the contained super absorbent resin particles7025-50 meshes;
middle layer 3 (fluffy non-woven fabric layer) with a gram weight of 35g/m2；
A second super absorbent resin layer 4 with a grammage of 130g/m2D of the contained super absorbent resin particles8035-80 meshes;
the bottom layer 5 (spunlace nonwoven fabric layer) has a gram weight of 28g/m2；
As shown in fig. 3, the core structure is provided with two strip-shaped flow guide grooves 6 penetrating from the upper surface of the surface layer 1 to the lower surface of the bottom layer 5, and the flow guide grooves 6 are filled with an absorbing material formed by mixing fluff pulp and super absorbent resin; the mass ratio of the fluff pulp to the super absorbent resin filled in the flow guide groove 6 is 1: 1.
Comparative example 1
A core structure sequentially comprises from top to bottom:
a spunlaced nonwoven surface layer with the gram weight of 85g/m2；
A first super absorbent resin layer with a grammage of 150g/m2D of the contained super absorbent resin particles7025-50 meshes;
a fluffy non-woven fabric layer with the gram weight of 45g/m2；
A second super absorbent resin layer with a grammage of 150g/m2，D8035-80 meshes;
a spunlaced nonwoven bottom layer with a gram weight of 28g/m2。
Comparative example 2
A core structure sequentially comprises from top to bottom:
surface layer with a grammage of 85g/m2Wherein, the surface layer is made of a layer of super absorbent resin composite paper, and the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two layers of raw paper layers made of wood pulp through wet papermaking;
a first super absorbent resin layer with a grammage of 150g/m2D of the contained super absorbent resin particles7025-50 meshes;
a fluffy non-woven fabric layer with the gram weight of 45g/m2；
A second super absorbent resin layer with a grammage of 150g/m2D of the contained super absorbent resin particles8035-80 meshes;
a spunlaced nonwoven bottom layer with a gram weight of 28g/m2。
Comparative example 3
Comparative example 3 is substantially the same as example 1 except that: the core body structure is provided with an oval diversion groove which penetrates from the upper surface of the surface layer to the lower surface of the first super absorbent resin layer, and the diversion groove is filled with an absorption material formed by mixing fluff pulp and super absorbent resin; the mass ratio of the fluff pulp to the super absorbent resin filled in the diversion groove is 1: 1.
Comparative example 4
Comparative example 4 is substantially the same as example 1 except that: the core body structure is provided with an oval diversion groove which penetrates from the upper surface of the second super absorbent resin layer to the lower surface of the bottom layer, and the diversion groove is filled with an absorption material formed by mixing fluff pulp and super absorbent resin; the mass ratio of the fluff pulp to the super absorbent resin filled in the diversion groove is 1: 1.
Comparative example 5
Comparative example 5 is substantially the same as example 1 except that:
the flow guide groove 6 is not filled with any material.
Comparative example 6
A core body structure is formed by wrapping fluff pulp and high-water-absorption resin with sanitary lining paper, wherein the mass ratio of the fluff pulp to the high-water-absorption resin is 1: 1.
The performance test of the absorption structures manufactured in examples 1 to 2 and comparative examples 1 to 6 was performed, and the performance test results are shown in table 1.
The test method comprises the following steps: at normal temperature, 0.9% physiological saline is adopted, 300g of metal ring is adopted for liquid adding at 0min, 10min and 20min respectively, the liquid adding amount is 80mL each time, and the time for completing the absorption each time is recorded as the absorption speed in unit of s; and the reverse osmosis is that after the absorption structure absorbs 80mL of 0.9% physiological saline, 5-30 g of filter paper is placed on the absorption structure, the filter paper is pressed for 3min by using a 3.5kg weight, and the gram weight increased by the filter paper is weighed, wherein the unit g is the reverse osmosis.
Figure BDA0002845948960000111
In table 1, the absorption rate corresponding to the liquid addition at 0min is recorded as the first absorption rate, the reverse osmosis measured after the completion of the absorption is recorded as the first reverse osmosis, the absorption rate corresponding to the liquid addition at 10min is recorded as the second absorption rate, the reverse osmosis measured after the completion of the absorption is recorded as the second reverse osmosis, the absorption rate corresponding to the liquid addition at 20min is recorded as the third absorption rate, and the reverse osmosis measured after the completion of the absorption is recorded as the third reverse osmosis.
From the experimental data in table 1, it can be seen that the composite absorption structure in the embodiments 1-2 of the present invention has an obvious effect compared with a core body of a common structure, and especially has an effect of accelerating absorption and preventing side leakage for the absorption speed of liquid. The composite absorption structure has the advantages of good surface dryness, good air permeability, large absorption capacity, high absorption speed, higher softness and the like, and is suitable for being used as an absorption core body of sanitary products such as paper diapers, sanitary towels, adult pants and the like, particularly suitable for being used as the absorption core body of the diaper.
The invention has not been described in detail and is in part known to those of skill in the art.
It is to be specifically noted that, in the present invention, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of describing the present invention and simplifying the description.
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 (10)

1. A composite absorbent structure comprising a core structure characterized by:
the core structure sequentially comprises a surface layer, a first high-water-absorption resin layer, a middle layer, a second high-water-absorption resin layer and a bottom layer from top to bottom; the surface layer is made of super absorbent resin composite paper;
the core body structure is provided with at least one flow guide groove penetrating from the surface layer to the bottom layer, and the flow guide groove is filled with an absorption material formed by mixing fluff pulp and super absorbent resin.
2. The composite absorbent structure of claim 1, wherein:
the shape of the diversion groove is strip-shaped or oval.
3. The composite absorbent structure of claim 1 or 2, characterized in that:
the super absorbent resin composite paper is formed by uniformly distributing super absorbent resin between two raw paper layers made of wood pulp through wet papermaking, and each layer of the super absorbent resin composite paper consists of two raw paper layers and a super absorbent resin layer sandwiched between the two raw paper layers.
4. The composite absorbent structure of claim 1 or 2, characterized in that:
the gram weight of the super absorbent resin composite paper is 50-200 g/m2。
5. The composite absorbent structure of claim 1 or 2, characterized in that:
the grammage of the first super absorbent resin layer and/or the second super absorbent resin layer is 30-200 g/m2。
6. The composite absorbent structure of claim 1 or 2, characterized in that:
the mesh number of the super absorbent resin with the mesh number of more than 70 percent of the super absorbent resin contained in the first super absorbent resin layer is distributed in the range of 25-50 meshes; and/or
The second super absorbent resin layer contains super absorbent resin with the mesh number of more than 80 percent, and the mesh number of the super absorbent resin is distributed in the range of 35-80 meshes.
7. The composite absorbent structure of claim 1 or 2, characterized in that:
the middle layer is made of fluffy non-woven fabrics.
8. The composite absorbent structure of claim 1 or 2, characterized in that:
the bottom layer is made of non-woven fabrics or dust-free paper.
9. The composite absorbent structure of claim 8, wherein:
the non-woven fabric is a hot air non-woven fabric, a spun-bonded non-woven fabric or a spunlace non-woven fabric.
10. The composite absorbent structure of claim 8, wherein:
the gram weight of the non-woven fabric is 8-50 g/m2(ii) a And/or
The gram weight of the dust-free paper is 20-60 g/m2。
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