CN107625583A

CN107625583A - Composite absorption core body made from a kind of method and this method for manufacturing composite absorption core body

Info

Publication number: CN107625583A
Application number: CN201710790938.1A
Authority: CN
Inventors: 荣敏杰; 田云; 许永升; 于庆华; 荣帅帅
Original assignee: Shandong Nuoer Biological Technology Co Ltd
Current assignee: Nuo Chen Co.,Ltd.
Priority date: 2016-09-10
Filing date: 2017-09-05
Publication date: 2018-01-26
Anticipated expiration: 2037-09-05
Also published as: WO2018045939A1; CN109199701B; CN107397628A; CN109551043A; CN106361506A; CN107625583B; CN109568012A; CN107397628B; CN109568012B; CN208447937U; CN109199701A; CN109551043B

Abstract

The invention discloses a kind of method for preparing composite absorption core body and composite absorption core body obtained by this method.Methods described includes：(1) in the tack coat of upper side sprayed coating first of bottom；(2) the first imbibition intumescent material for water accepting layer under formation is sprinkled with the bottom upper side of the tack coat of sprayed coating first, then absorbent central layer is laid on lower water accepting layer top；(3) tack coat of sprayed coating second and it is sprinkled with the second imbibition intumescent material of the water accepting layer in formation on the downside on top layer；(4) material that step (3) obtains is covered on the absorbent central layer for the material that step (2) obtains by the downward mode in upper water accepting layer side；(5) it is compacted, so as to obtain composite absorption core body.The composite absorption core body made from the inventive method have the advantages that it is dry-ness it is good, not stick together, not discontinue, expansion are not hardened, it is fast that diffusion velocity is blended under liquid and it is few to return milliosmolarity.

Description

Composite absorption core body made from a kind of method and this method for manufacturing composite absorption core body

Technical field

The present invention relates to composite absorption core body field, and in particular to it is a kind of manufacture composite absorption core body method and by the party Composite absorption core body made from method.

Background technology

In the prior art, during composite absorption core body generally comprises top layer, bottom and is arranged between top layer and bottom Interbed, and absorbent material is fixed on the surface in intermediate layer by modes such as bondings.When composite absorption core body touches liquid During body, liquid reaches intermediate layer by top layer, and the absorbent material being fixed on intermediate layer absorbs and kept, and plays absorption The effect of liquid.Therefore, the amount of absorptive core fluid-absorbing is determined by the amount and absorbent properties of absorbent material.This In structure, because absorbent material is typically distributed between top layer and intermediate layer and between bottom and intermediate layer.But at this In kind structure, longtitudinal dispersion speed of the liquid from top layer to bottom and the horizontal proliferation speed along composite absorption core surface Relatively slow, solution causes liquid excessive in local accumulation and causes side leakage or flood stain.

In order to solve the problems, such as that longtitudinal dispersion speed is partially slow, CN201310359556.5 discloses a kind of composite absorbent core Body, including top layer, bottom and the absorbent central layer being arranged between the top layer and the bottom, open on the absorbent central layer Provided with multiple longitudinal direction perforation, hydroscopic high-molecular resin is filled with the longitudinal direction perforation.But this composite absorption core body is still It is so no to solve the problems, such as that liquid horizontal proliferation speed is partially slow.

CN201310393117.6 discloses a kind of composite absorption core body and paper diaper that function is inhaled with wink, described compound Absorptive core absorbs water macromolecule layer, the middling speed water suction wood pulp cotton mixed layer and macromolecule layer that quickly absorbs water by full water conservancy diversion top layer, at a slow speed Sequentially form.But the full water conservancy diversion top layer of this composite absorption core body is also the longtitudinal dispersion speed of accelerating liquid.

The amenities such as baby paper diaper is widely used at present, including compound core body this kind of paper diaper due to It is ultra-thin, not discontinue, therefore the market share is also constantly expanding, but the absorption system of the prior art for including composite absorption core body Following defect also be present in product such as paper diaper：(1) the multiple infiltration rate of existing composite absorption core body type baby paper diaper is slow, There is leakage of urine phenomenon；(2) existing composite absorption core body type paper diaper are after urine is absorbed, due to be multilayer dust-free paper and Non-woven fabrics forms, and absorbent central layer expands after urine is absorbed can make composite absorption core body be hardened.

The content of the invention

(1) technical problems to be solved

The technical problem to be solved in the present invention is that solve that composite absorption core body infiltration rate is slow, swollen after more, imbibition of returning milliosmolarity It is swollen to be hardened and expand the problems such as causing to wear to caused by user.

(2) technical scheme

First aspect present invention provides a kind of method for preparing composite absorption core body, the composite absorption core body from upper and Under include top layer, upper water accepting layer, absorbent central layer, lower water accepting layer and bottom successively, it is characterised in that methods described include it is as follows Step：

(1) in the tack coat of upper side sprayed coating first of bottom；

(2) the first imbibition dilatancy for water accepting layer under formation is sprinkled with the bottom upper side of the tack coat of sprayed coating first Material, then lay absorbent central layer on lower water accepting layer top；

(3) on the downside on top layer the tack coat of sprayed coating second and be sprinkled with the water accepting layer in formation the second imbibition expansion Property material；

(4) material that step (3) obtains is covered in the material that step (2) obtains by the downward mode in upper water accepting layer side Absorbent central layer on；

(5) it is compacted, so as to obtain the composite absorption core body.

In some preferred embodiments, first tack coat and second tack coat independently are hot melt structure Glue-line.

, can the first bottom on the upper side of bottom in the tack coat of sprayed coating first in other preferred embodiment First baffle is placed along its length in slice width degree centre position；And/or before the tack coat of sprayed coating second, can be first under top layer Second baffle is placed along its length in side upper epidermis width centre position.

The shape of the first baffle and the second baffle can be preferably independently strip, Z with identical or different Shape, S-shaped shape or groined type.The quantity of the first baffle and the second baffle can be with identical or different, preferably independently Ground is 1 to 4.In the case where the full width of the composite absorption core body is 8 to 15cm, the first baffle and described second The width of baffle plate is independently 1 to 4cm.

, can bottom layer width centre position be along its length only on the upper side of bottom in some preferred embodiments Place first baffle.

In some embodiments, the first imbibition intumescent material and the second imbibition intumescent material can phases It is same or different, and it independently is hydroscopic high-molecular resin particle.In some preferred embodiments, second imbibition Intumescent material is the hydroscopic high-molecular resin of 20-120 mesh.In other preferred embodiment, first imbibition Intumescent material is the hydroscopic high-molecular resin of 20-120 mesh；Or the D of the second imbibition intumescent material₅₀For 25-50 mesh, And/or the D of the first imbibition intumescent material₈₀For 30-100 mesh.

The top layer and/or bottom are for square grammes per square metre 10-90g spun-bonded non-woven fabrics or dust-free paper or by polyethylene fiber One or more of warps in dimension, polypropylene fibre, polyvinyl chloride fibre, polyester fiber, natural or synthetic cotton or cellulose fibre Cross hot blast, hot rolling, spun lacing, acupuncture, spunbond or air web and be molded the non-woven fabrics to be formed or textile cloth；And/or the centre Absorbed layer is loft non-woven cloth of square grammes per square metre in 15-80g.

In some embodiments, the line of the first imbibition intumescent material and the second imbibition intumescent material is swollen Swollen coefficient independently is 20 to 100.

The pressurization under 0.7psi pressure of the first imbibition intumescent material and the second imbibition intumescent material Uptake independently is not less than 10g/g；

The swirl method infiltration rate of the first imbibition intumescent material and the second imbibition intumescent material is independently For less than 85 seconds；And/or

16 hours leachable contents of the first imbibition intumescent material and the second imbibition intumescent material are independent Ground is less than 15%.

Centrifugation of the centrifuge retention amount of the second imbibition intumescent material higher than the first imbibition intumescent material is protected Water, and the liquid absorption rate of the second imbibition intumescent material is slower than the liquid of the first imbibition intumescent material Infiltration rate.

The present invention provides the composite absorption core body as made from the method described in first aspect present invention in second aspect.

(3) beneficial effect

Compared with prior art, had the following advantages that using composite absorption core body made from the inventive method：It is dry-ness It is good, do not rise and stick together, not discontinue, do not expand and be hardened and to return milliosmolarity few.Because the liquid-conveying ducts of imbibition self-expanding are provided with, therefore There are significant guide functions after imbibition, so liquid infiltration rate is fast, diffusion is also significantly better than general composite absorption Core body, can apply to various absorbent articles, especially amenities, particularly disposable sanitary articles, for example, sanitary napkin or For example ultra-thin baby paper diaper of person's paper diaper, baby diaper etc..

Brief description of the drawings

Fig. 1 is the process chart in the specific embodiment of the present invention.

Fig. 2 is the structural representation of one embodiment of the composite absorption core body of the present invention, and wherein composite absorption core body is State before imbibition, and the position of liquid-conveying ducts is only may be seen indistinctly.

Fig. 3 is the profile of the composite absorption core body shown in Fig. 2.

Fig. 4 is the structural representation of another embodiment of the composite absorption core body of the present invention, wherein composite absorption core body For state before imbibition, but the width of liquid-conveying ducts is bigger than the width of the composite absorption core body in Fig. 2.

Fig. 5 be Fig. 2 composite absorption core body imbibition after hydroscopic high-molecular resin expansion so as to forming obviously drain Passage.

Fig. 6 is the profile of the composite absorption core body in Fig. 5.

Fig. 7 to 12 is to be placed with a strip baffle plate parallel to bottom layer length direction respectively, perpendicular to bottom layer length One strip baffle plate, multiple (3) strip baffle plate, S rows baffle plate, Z baffle plates and groined type baffle plates perpendicular to bottom layer length And the schematic diagram of the bottom upper surface of sprayed coating hot melt structure adhensive.

In figure：1：Top layer；2：Upper water accepting layer；3：Absorbent central layer；4：Lower water accepting layer；5：Bottom；6：Liquid-conveying ducts；7：It is empty White area (region corresponding with liquid-conveying ducts for not being distributed hydroscopic high-molecular resin)

Embodiment

To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is The part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.

First aspect present invention provides a kind of method for preparing composite absorption core body, the composite absorption core body from upper and Under include top layer, upper water accepting layer, absorbent central layer, lower water accepting layer and bottom successively, it is characterised in that methods described include it is as follows Step：(1) in the tack coat of upper side sprayed coating first of bottom；(2) it is sprinkled with use on the bottom upper side of the tack coat of sprayed coating first Absorbent central layer is laid in the first imbibition intumescent material for forming lower water accepting layer, then on lower water accepting layer top；(3) on top layer The tack coat of sprayed coating second and the second imbibition intumescent material for forming upper water accepting layer is sprinkled with downside；(4) by step (3) Obtained material is covered on the absorbent central layer for the material that step (2) obtains by the downward mode in upper water accepting layer side；(5) press It is real, so as to obtain the composite absorption core body.Technological process in one specific embodiment of the method for the present invention can be with Referring to Fig. 1.

In some other embodiments, the method for preparing the composite absorption core body described in first aspect present invention also may be used To comprise the following steps：

(1) glue sprayer sprayed coating the first hot melt structure glue-line is used on the downside of top layer；

(2) the width centre position in the absorbent central layer on the upper side of absorbent central layer places first along its length Baffle plate, then it is sprinkled with the first imbibition intumescent material for forming upper water accepting layer；

(3) the first hot melt structure glue-line is bonded in the upper side for being sprinkled with the first imbibition intumescent material of absorbent central layer On, take out first baffle and be compacted；

(4) glue sprayer sprayed coating the second hot melt structure glue-line is used on bottom upper side；

(5) the width centre position in the absorbent central layer on the downside of absorbent central layer places second along its length Baffle plate, then it is sprinkled with the second imbibition intumescent material for forming lower water accepting layer；

(6) the second hot melt structure glue-line is bonded in the downside for being sprinkled with the second imbibition intumescent material of absorbent central layer On, take out second baffle and be compacted.

Methods described might not be carried out according to sequence described above.Such as：

Step (1) and step (2) can be carried out simultaneously, can also successively be carried out or be carried out in reverse order；

Step (4) and step (5) can be carried out simultaneously, can also successively be carried out or be carried out in reverse order；

Step (1) and step (4) can be carried out simultaneously, can also successively be carried out or be carried out in reverse order；

Step (2) and step (5) can successively be carried out or carried out in reverse order；

Step (1) and step (5) can be carried out simultaneously, can also successively be carried out or be carried out in reverse order；

Step (2) and step (4) can be carried out simultaneously, can also successively be carried out or be carried out in reverse order；

On condition that step (3) must be carried out after step (1) and step (2), and step (6) must be in step (4) Carried out with after step (5).

Second imbibition intumescent material of the first imbibition intumescent material of water accepting layer and/or the lower water accepting layer of formation in formation Can be by least one material blanking roller blanking.

Furthermore it is possible in area corresponding to liquid-conveying ducts predeterminated position before top layer downside sprayed coating the first hot melt structure glue-line Place third baffle and/or corresponded on bottom upper side before the second hot melt structure of sprayed coating glue-line in liquid-conveying ducts predeterminated position in domain Region place fourth gear plate to form corresponding non-sprayed coating hot melt structure adhensive region, and will non-sprayed coating hot melt structure adhensive region Correspondingly it is aligned and is adhered by with first baffle and/or second baffle.

Composite absorption core body has water conservancy diversion effect made from the method for the invention, can be five-layer structure, from top to bottom Respectively top layer, upper water accepting layer, absorbent central layer, lower water accepting layer and bottom；The upper water accepting layer and/or lower water accepting layer are in view picture The middle part of composite absorption core body width is provided with liquid-conveying ducts.

The present invention has no particular limits to the shape and size of obtained composite absorption core body, can as needed and Form different shapes and there is required size.For example, for shape, composite absorption core body can be such as cylinder Body, square, cuboid are designed to tool and are of a variety of shapes according to being actually needed.For the ease of description, if Without there is special instruction, will be hereafter described by taking rectangle sheet material as an example.Thickness, width and the length of sheet material can be as needed To design.

Top layer and bottom on the composite absorption core body, do not indicate conversely such as, top layer is composite absorption core body The layer of side is penetrated into positioned at liquid, bottom is composite absorption core body positioned at the layer with the top layer opposite side.For paper diaper Composite absorption core body exemplified by, top layer be close to body side layer, bottom be away from body side layer.

The present invention has no particular limits to the full width of the composite absorption core body, can as needed set, cut out Cut or splice.In some embodiments, the composite absorption core body full width is 8cm to 15cm, and for example, 8cm is extremely 12cm, for example, 8,9,10,11,12,13 or 14cm.

The top layer can be woven cloths or non-woven cloth.In some preferred embodiments, the woven cloths or The material of person's non-woven cloth can be made up of fiber, and the fiber is selected from fine by polyethylene fibre, polypropylene fibre, polyvinyl chloride The group that dimension, polyester fiber, cellulose fibre, natural fiber or staple fibre form.The non-woven cloth can for example use The fiber is made for hot blast processing, hot rolling treatment, spunbond processing, spun lacing processing or air web moulding process；The weaving Cloth can be for example made up of method for weaving using the fiber.

The material of the bottom can be polyethylene film or polyvinyl chloride film.Preferably, the material of the bottom Material is ventilated membrane, for example, the polyethylene breathable film doped with particles of inorganic material or polyvinyl chloride ventilated membrane.

The absorbent central layer can be woven cloths or non-woven cloth.It is described to knit in some preferred embodiments Making the material of cloth or non-woven cloth can be made up of fiber, and the fiber is selected from by polyethylene fibre, polypropylene fibre, polychlorostyrene The group that vinyl fiber, polyester fiber, cellulose fibre, natural fiber or staple fibre form.The non-woven cloth for example may be used So that the fiber to be made using hot blast processing, hot rolling treatment, spunbond processing, spun lacing processing or air web moulding process；Institute Woven cloths are stated can be for example made up using the fiber of method for weaving.

In other preferred embodiment, the top layer and/or bottom are that square grammes per square metre is 10g/m²To 90g/m² (such as 10,20,30,40,50,60,70 or 80g/m²Such as 10g/m²To 50g/m²), preferably 35g/m²To 55g/m²'s Spun-bonded non-woven fabrics or dust-free paper, or by polyethylene fibre, polypropylene fibre, polyvinyl chloride fibre, polyester fiber, natural or people The one or more made in cotton or cellulose fibre are molded to be formed by hot blast, hot rolling, spun lacing, acupuncture, spunbond or air web Non-woven fabrics or textile cloth.

In other embodiments, the absorbent central layer is square grammes per square metre in 15g/m²To 80g/m²(such as 15,20, 25th, 30,35,40,45,50,55,60,65,70 or 75g/m²) loft non-woven cloth, be, for example, square grammes per square metre in 35g/m²Extremely 50g/m²Loft non-woven cloth.In the case where absorbent central layer is loft non-woven cloth, the SAP for forming water accepting layer can before imbibition To be partially or entirely embedded in loft non-woven cloth, and tightly can be embedded in after imbibition expansion in loft non-woven cloth, So as to maintain the shape of composite absorption core body after imbibition, inhaled like that rather than composite absorption core body of the prior art Because SAP particles occur to reunite because of reasons such as weight changes and tomography after liquid.The composite absorption core body of the present invention is after imbibition It is able to maintain that the performance of shape is especially beneficial in the case where it is used for paper diaper, because if the reunion or tomography occurs Words can cause the discomfort of user to result even in compressing or friction with physical contact part

In some preferred embodiments, the upper water accepting layer be 20 mesh to 120 mesh (be, for example, 20,40,60,80, 100 or 120 mesh) hydroscopic high-molecular resin (Super AbsorbentPolymer, SAP)；And/or the lower water accepting layer is 20 Mesh to 120 mesh (be, for example, 20,40,60,80,100 or 120 mesh) hydroscopic high-molecular resin.

Hydroscopic high-molecular resin used in this application is all known, and the present invention does not have to the SAP that water accepting layer uses Special limitation, as long as can expand after absorption of liquid and form liquid-conveying ducts in no distribution SAP region.Example The hydroscopic high-molecular resin of various performances can be such as bought from Nore Bioisystech Co., Ltd of freezing as needed.

In other preferred embodiments, square grammes per square metre of the upper water accepting layer and/or lower water accepting layer can be 80g/m²To 300g/m²(it is, for example, 80,100,150,200,250 or 300g/m²).Also it is preferred that the upper water accepting layer The mesh number of SAP particles is that the mesh number of more than 50% particle is distributed (D₅₀) in 25 mesh to 50 mesh scopes；The SAP of the lower water accepting layer The particle mesh number that the mesh number of particle is more than 80% is distributed (D₈₀) in 30 mesh to 100 mesh scopes.If the macromolecule water uptake tree The particle of fat is excessive, then it is strong to be likely to result in amenities granular sensation, uncomfortable；As fruit granule is too small, amenities produced Cheng Zhonghui produces more airborne dust.

Preferably, after the imbibition of SAP particles and imbibition before particle diameter ratio (linear expansion coefficient) can be 20 to 100 (such as For 20,30,40,50,60,70,80,90 or 100).If for example, SAP particle of the height of liquid-conveying ducts equivalent to 5 80 mesh The diameter sum of (particle diameter be about 0.180mm, expansion rate 50), then the height of liquid-conveying ducts is about 0.90mm before imbibition, imbibition Height afterwards is about 45mm, and 50 times are improved equivalent to drain effect.Therefore, liquid-conveying ducts of the invention are imbibition self-expanding Liquid-conveying ducts, it between such as water accepting layer and intermediate layer with setting liquid-conveying ducts without utilizing absorbing material imbibition expansion Characteristic is come to expand the situation of liquid-conveying ducts be dramatically different, because the liquid-conveying ducts of latter event do not have imbibition self expandable Ability, otherwise the then large-sized liquid-conveying ducts of initial designs, thus sacrifice globality, the bulk strength of composite absorption core body With it is attractive in appearance, or be the less liquid-conveying ducts of initial setting up, so as to cause drain positive effect insufficient.

In some preferred embodiments, the pressurizing absorption amount under SAP 0.7psi pressure can be not less than 10g/ G, for example, 10g/g to 26g/g, for example, 10,15,20,25g/g.

In some preferred embodiments, SAP D₅₀For 25 mesh to 50 mesh, (particle diameter of i.e. 50% particle is in 25 mesh To the scope of 50 mesh) or its any subrange, the mesh of for example, 25,30,35,40,45 or 50.In the preferable embodiment party of other In formula, SAP D₈₀For 30 mesh to 100 mesh (particle diameter of i.e. 80% particle is in 30 mesh to the scope of 100 mesh) or its anyon Scope, the mesh of for example, 30,35,40,45,50,55,60,65,70,75,80,85,90,95 or 100.It is in the particle size range Interior SAP particles can cause composite absorption core body preferably to form liquid-conveying ducts after absorbing liquid volume expansion.

In some preferred embodiments, SAP swirl method infiltration rate can be less than 85 seconds, be, for example, less than 85, 60th, 45,20 seconds.The method of testing of swirl method infiltration rate is as follows：In the 100mL beakers with rotor, load 0.9% life 50.0 ± 0.5g of salt solution is managed, beaker is placed on temperature constant magnetic stirring machine, is stirred with 600 revs/min of speed, accurately weighed 2.00g macromolecule, puts into whirlpool, while starts timing with stopwatch, when whirlpool disappear, when liquid level turns into horizontality, As terminal, its time (second) is recorded.3 sample tests are taken, take the average value of 3 samples to be accurate to one small as measurement result Number.Wherein, the temperature of physiological saline is 25 ± 2 DEG C；Beaker is flat bottom beaker；The a diameter of 8mm of magnetic stirring bar, length are 30mm。

In some preferred embodiments, SAP 16 hours leachable contents are less than 15%, be, for example, less than 14%, 13%th, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2% or 1%.The survey of 16 hours leachable contents Method for testing is as follows：200mL physiological saline is weighed with graduated cylinder, is poured into 250mL beakers or conical flask；About 1g SAP are weighed, are put into In conical flask, record weighs SAP weight m_s；The physiological saline for filling SAP is stirred 1 under 250 ± 50 revs/min of rotating speed Hour；Another is filled into 200mL it is not added with SAP physiological saline and do same stir process, as blank sample；Stop stirring, make The macromolecule of gel sinks to bottom of a cup (placing 10 minutes) completely, filters about 100mL supernatants；50mL blank samples and sample are measured respectively The filtrate of product, it is 10 to be titrated to pH value with standard NaOH solution, and it is 2.7 to be then titrated to pH value with standard hydrochloric acid solution, record The volume of standard liquid used.The amount n of carboxylic acid material_COOHCalculate：n_COOH=(V_NaOH,s–V_NaOH,b)c_NaOH；V_NaOH,sFor by sample Filtrate is titrated to the volume that pH is 10 standard NaOH solutions needed；V_NaOH,bIt is needed for 10 for blank filtrate is titrated into pH The volume of standard NaOH solution；c_NaOHFor the substance withdrawl syndrome of NaOH standard liquids；The amount n of whole carboxylate radical materials_totMeter Calculate：n_tot=(V_HCl,s–V_HCl,b)c_HCl；V_HCl,sFrom pH to be that 10 to be titrated to pH be standard HCl used in 2.7 molten by sample filtrate The volume of liquid；V_HCl,bFor by blank filtrate from pH be 10 volumes for being titrated to that pH is the standard HCl solution used in 2.7；c_HClFor The substance withdrawl syndrome of HCl standard liquids；The amount of PAA material is calculated as follows：n_COONa=n_tot–n_COOH；Acrylic acid and third The quality m of olefin(e) acid sodium_COOHAnd m_COONaIt is calculated as follows：m_COOH=n_COOH×M_COOH×Fdl；m_COONa=n_COONa×M_COONa×Fdl； M_COOHFor the molal weight of acrylic acid, equal to 72g/mol；M_COONaFor the molal weight of PAA, equal to 94g/mol；Fdl is Index is diluted, equal to 200/50=4；Solubles content w is expressed as with mass fraction：W=(m_COOH+m_COONa)/m_s×100；m_s For the quality of testing SA P samples.Two samples of parallel testing are averaged.

In some preferred embodiments, the SAP of the different index of at least 2 classes is used.For example, upper water accepting layer Pressurizing absorption amounts of the SAP under 0.7psi pressure is higher than 10g/g, and the particle size distribution range of more than 50% particle is 25 mesh to 50 Mesh；Lower water accepting layer SAP swirl method infiltration rate is less than 85 seconds, and the size distribution ranges of 80% particle are 30 mesh to 100 mesh, SAP 16 hours leachable contents are less than 15%.

In other particularly preferred embodiment, hydroscopic high-molecular resin used in the upper water accepting layer from Heart moisture-holding capacity is higher than the centrifuge retention amount of the lower water accepting layer, and hydroscopic high-molecular resin used in the upper water accepting layer Liquid absorption rate is slower than the liquid absorption rate of the lower water accepting layer.SAP groups as upper water accepting layer and the use of lower water accepting layer During conjunction, the liquid after imbibition can be significantly reduced and return milliosmolarity.

In some embodiments, the upper water accepting layer is fixed on the downside on the top layer by hot melt structure glue-line； And/or the lower water accepting layer is fixed on the upper side of the bottom by hot melt structure glue-line.

On the set location of the liquid-conveying ducts, in other embodiment, the upper water accepting layer and it is described under Water accepting layer is provided with liquid-conveying ducts in the approximate mid-section or medium position of view picture composite absorption core body width.Implement in other In mode, the upper water accepting layer is provided with liquid-conveying ducts at the middle part of view picture composite absorption core body width, and in the lower water accepting layer In be not provided with liquid-conveying ducts.In some preferred embodiments, the lower water accepting layer is in view picture composite absorption core body width Middle part be provided with liquid-conveying ducts, and liquid-conveying ducts are not provided with water accepting layer on described.

The present invention has no particular limits to the quantity of the liquid-conveying ducts, such as can be 1 to 4, and for example, 1,2,3 Or 4.

The present invention also has no particular limits to the shapes of the liquid-conveying ducts, if can allow absorption liquid more rapidly Spread on ground.For example, the shape of the liquid-conveying ducts can be strip, Z-shaped shape, S-shaped shape or groined type.Certainly, these Region can also have other shapes, be oozed as long as can allow the liquid to spread rapidly and reduce to return.It is excellent at some In the embodiment of choosing, from the point of view of liquid horizontal proliferation speed, preferably strip or groined type.

The present invention has no particular limits to the shape of the inner chamber of the liquid-conveying ducts, for example, the horizontal stroke of the liquid-conveying ducts Cross sectional shape is V-shaped, trapezoidal, square, rectangle, semicircle or ellipse.

The present invention is not also limited especially the width (i.e. the width of clear area) of the liquid-conveying ducts of the composite absorption core body System.In the case where the composite absorption core body is used for paper diaper, the width of liquid-conveying ducts is preferably 0.5cm to 4cm, is, for example, 0.5th, 1,2,3 or 4cm.Then, the width of baffle plate can be 1 to 4cm.If baffle plate is too narrow, can not obtain under optimal liquid Infiltration rate degree；If baffle plate is too wide, guide layer both sides macromolecule can be caused blocked up, and the liquid absorption area of water accepting layer diminishes.

In some embodiments, before liquid is not absorbed, the liquid-conveying ducts of composite absorption core body are in a thickness direction Size (i.e. height) is less than 1cm, for example, less than 0.9,0.8,0.7,0.6,0.5,0.4,0.3,0.2 or 0.1cm, or even It is smaller.Therefore, so shallow liquid-conveying ducts be can't see at all from the appearance, and not even carefully pressing, which does not touch, even feels Less than the presence of liquid-conveying ducts.On the contrary, in the case of using same amount SAP, if the height of liquid-conveying ducts is set into excessive, meeting Cause the thickness of composite absorption core body excessive, influence globality, bulk strength and the outward appearance of composite absorption core body.

It is understandable to be, although such height of liquid-conveying ducts ensure that the globality of composite absorption core body, entirety are strong Degree and outward appearance, but if liquid-conveying ducts are less than 1cm before and after imbibition anterior and posterior height imbibition, then such height It is likely to limit the drain ability of liquid-conveying ducts.

However, the water accepting layer (upper water accepting layer and/or lower water accepting layer) of the composite absorption core body of the present invention, which uses, has imbibition The SAP particles of high level expansion are formed afterwards, and the liquid-conveying ducts of composite absorption core body are arranged in water accepting layer, and in water accepting layer The relevant position of middle arrangement liquid-conveying ducts is not distributed absorbent material such as SAP.That is, liquid-conveying ducts are the area without distribution SAP Domain, for convenience of purpose is described, such region is referred to as clear area in the present invention.Due to SAP particles after imbibition high level expansion, So that the height (size of composite absorption core body in a thickness direction) of liquid-conveying ducts can significantly increase after imbibition, so as to aobvious Improve the drain effect of liquid-conveying ducts with writing.In other words, after the liquid-conveying ducts of composite absorption core body of the invention have imbibition Self expandable characteristic, it is a kind of self-expanding liquid-conveying ducts.So as to both ensure that composite absorption core body (such as product pin before imbibition Sell the stage) globality, bulk strength and outward appearance, in turn ensure that has enough imbibition water conservancy diversion effects after imbibition.

The present invention provides the composite absorption core body as made from the method for the present invention in second aspect.The composite absorbent core Body can be used for manufacturing absorbent article, and the absorbent article includes the composite absorption core body described in first aspect present invention.One In a little preferred embodiments, the absorbent article is disposable sanitary articles.It is described in further preferred embodiment Disposable sanitary articles are sanitary napkin or paper diaper.

By the absorbent article be paper diaper in case of, the paper diaper in addition to the composite absorption core body, Other parts can use the structure of prior art.For example, paper diaper can include the composite absorption core body being clipped in it In innermost layer and outermost layer, both ends with Velcro patch elastic waistline, both sides stereoscopic leakproof pad and can be with institute State Attacking Midfielder's veneer that Velcro patch is used cooperatively.

In some preferred embodiments, the composite absorption core body is used for paper diaper, and liquid-conveying ducts are length Bar shaped, more preferably perpendicular to the length and/or the strip of width for meeting absorptive core sheet material so that SAP absorbs urine Being formed after expansion can be along the drain formed perpendicular to the length of sheet material and/or the strip liquid-conveying ducts of width, sheet material Passage is front and rear and/or bends right and left or folds.Bent along the liquid-conveying ducts perpendicular to sheet width relative to body bilateral In the case of, it is possible to reduce because expanding to the extruding or friction on the inside of both legs after composite absorption core body absorption urine, so as to eliminate Or reduce and meet discomfort caused by absorptive core expands；Along the feelings bent before and after the liquid-conveying ducts of sheet length Under condition, it is possible to reduce composite absorbent core volume expansion causes uncomfortable caused by obvious front and rear bulging or unsightly.It is more excellent at some In the embodiment of choosing, the liquid-conveying ducts are shaped as strip, and composite absorption core body after imbibition can left and right from It is no more than 60 ° by the angle formed after bending.

The present invention is further detailed below in reference to accompanying drawing.

Reference picture 2, a kind of composite absorption core body with water conservancy diversion effect made from the inventive method is illustrated therein is, this is multiple Conjunction absorptive core is five-layer structure, from top to bottom respectively top layer 1, upper water accepting layer 2, absorbent central layer 3, lower water accepting layer 4 and bottom Layer 5.The lower water accepting layer 4 is provided with liquid-conveying ducts 6 at the middle part of view picture composite absorption core body width.

The full width of the composite absorption core body is 8-15cm, for example, 8-12cm.The lower water accepting layer 4 is answered in view picture The middle part for closing absorptive core width is provided with the wide liquid-conveying ducts 6 of such as 0.5-4cm.The width of liquid-conveying ducts can be set as needed Meter, can be with more relatively small (as shown in Figure 3), can also be somewhat larger (as shown in Figure 4).

Fig. 3 is the profile of the composite absorption core body shown in Fig. 2；Fig. 4 is another of the composite absorption core body of the present invention The structural representation of embodiment, wherein composite absorption core body are state before imbibition, but the width of liquid-conveying ducts is than answering in Fig. 2 The width for closing absorptive core is big；Fig. 5 be Fig. 2 composite absorption core body imbibition after hydroscopic high-molecular resin expansion so as to being formed very Obvious liquid-conveying ducts；Fig. 6 is the profile of the composite absorption core body in Fig. 5.

Reference picture 3, Fig. 3 are the profiles of the composite absorption core body shown in Fig. 2.In water swelling it can be seen from Fig. 3 Before, composite absorption core body is in the cross-sectional area very little of liquid-conveying ducts 6, opening position of the composite absorption core body at the place of liquid-conveying ducts 6 Thickness and adjacent position (referring to Fig. 2 to 3) thickness difference very little, be millimeter rank, equivalent to several or dozens of macromolecule Diameter sum before water absorbing resin particle expansion, does not interfere with composite absorption core body or includes the absorbent article of composite absorption core body Packaging and attractive in appearance.When the water accepting layer water swelling being made up of macromolecule resin, liquid-conveying ducts opening position is not due to being distributed Hydroscopic high-molecular resin, and the hydroscopic high-molecular resin imbibition on side expands, therefore form cross-sectional area and significantly increase So as to play the liquid-conveying ducts of significant water conservancy diversion effect (reference picture 5 and Fig. 6).

The present invention will be hereafter further detailed by way of embodiment, but protection scope of the present invention is not It is limited to embodiment.

Embodiment 1

Top layer uses width as 9cm, grammes per square metre 10g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 140g/m², 20 mesh height Molecule water-absorbing resin, absorbent central layer use grammes per square metre 35g/m²Hot blast loft non-woven cloth, lower water accepting layer uses grammes per square metre 140g/m²、 The hydroscopic high-molecular resin of 40 mesh, bottom use width as 9cm, grammes per square metre 10g/m²Dust-free paper；Preparation process is：

1) the wide strip baffle plates of 1cm are placed along its length in the middle part of the upper side bottom layer width of bottom, then use glue sprayer Sprayed coating 0.5g/m²Hot melt structure glue-line；

2) lower water accepting layer is sprinkled with the bottom upper side of sprayed coating hot melt structure glue-line, then in the laying of lower water accepting layer top Between absorbed layer；

3) with glue sprayer sprayed coating hot melt structure glue-line and it is sprinkled with water accepting layer on the downside of top layer；

4) the upper water accepting layer side of step 3) is covered in downwards the absorbent central layer top of step 2), takes out strip baffle plate The composite absorption core body with water conservancy diversion effect can be obtained after compacting.

Embodiment 2

Top layer uses width as 10cm, grammes per square metre 30g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 140g/m², 25 mesh height Molecule water-absorbing resin, absorbent central layer use grammes per square metre 45g/m²Hot blast loft non-woven cloth, lower water accepting layer uses grammes per square metre 140g/m²、 The hydroscopic high-molecular resin of 80 mesh, bottom use width as 10cm, grammes per square metre 30g/m²Dust-free paper；Preparation process is：

1) the wide strip baffle plates of 2.5cm are placed along its length in the middle part of the upper side bottom layer width of bottom, then use glue spraying Machine sprayed coating 1g/m²Hot melt structure glue-line；

Embodiment 3

Top layer uses width as 11cm, grammes per square metre 50g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 140g/m², 32 mesh height Molecule water-absorbing resin, absorbent central layer use grammes per square metre 50g/m²Hot blast loft non-woven cloth, lower water accepting layer uses grammes per square metre 140g/m²、 The hydroscopic high-molecular resin of 120 mesh, bottom use width as 11cm, grammes per square metre 50g/m²Dust-free paper；Preparation process is：

1) the wide strip baffle plates of 4cm are placed along its length in the middle part of the upper side bottom layer width of bottom, then use glue sprayer Sprayed coating 1.5g/m²Hot melt structure glue-line；

Embodiment 4

Top layer uses width as 12cm, grammes per square metre 20g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 140g/m², 34 mesh height Molecule water-absorbing resin, absorbent central layer use grammes per square metre 38g/m²Hot blast loft non-woven cloth, lower water accepting layer uses grammes per square metre 140g/m²、 The hydroscopic high-molecular resin of 120 mesh, bottom use width as 12cm, grammes per square metre 20g/m²Dust-free paper；Preparation process is：

1) along the baffle plate for placing the wide Z-shaped shapes of 3cm in the middle part of the upper side bottom layer width of bottom, then with glue sprayer sprayed coating 1.8g/m²Hot melt structure glue-line；

Embodiment 5

Top layer uses width as 8cm, grammes per square metre 30g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 110g/m², 33 mesh height Molecule water-absorbing resin, absorbent central layer use grammes per square metre 38g/m²Hot blast loft non-woven cloth, lower water accepting layer uses grammes per square metre 140g/m²、 The hydroscopic high-molecular resin of 108 mesh, bottom use width as 12cm, grammes per square metre 20g/m²Dust-free paper；Preparation process is：

1) along the baffle plate for placing the wide S-shaped shapes of 2cm in the middle part of the upper side bottom layer width of bottom, then with glue sprayer sprayed coating 1.6g/m²Hot melt structure glue-line；

In above-described embodiment, place strip baffle plate, make bottom upper middle position leave space position do not spill it is lower Water accepting layer.When absorptive core absorbs liquid, the hydroscopic high-molecular resin expansion of the upper absorbed layer and the absorbed layer is formed, So as to form liquid-conveying ducts 6 in the opening position for not spilling lower water accepting layer, it is possible thereby to shorten the fluid seepage time, and compared with The diffusion length of composite absorption core body is improved well.

Comparative example 1

Composite absorption core body (i.e. normal core body) is prepared in the essentially identical method of embodiment 1, is led the difference is that not formed Liquid passage (i.e. groove).

Core body made from above-described embodiment 1 and 2 is cut into 38X 10cm specifications, tests the composite absorbent core of the present invention Body, and control is used as using comparative example 1.

Method of testing for the present invention composite absorption core body among put stainless steel annulus (internal diameter 50mm, external diameter 60mm, Weight is 320g, cylinder heights 5cm), physiological saline 80ml is added every time, is spaced 10 minutes, and common liquid feeding body is three times；30th point Clock test, which is returned, oozes (a diameter of 10cm of compression weight, weight 12kg, filter paper is neutral Medium speed filter paper).As a result referring to table 1 below.

Table 1

By data above as can be seen that the composite absorption core body of the invention with liquid-conveying ducts oozes in infiltration rate and returning Aspect has a clear superiority.

Embodiment 6

Composite absorption core body is prepared in a manner of substantially the same manner as Example 1, unlike：It is 3.5cm's to form width Liquid-conveying ducts；Top layer uses grammes per square metre as 40g/m²Dust-free paper, upper water accepting layer uses grammes per square metre 140g/m², particle diameter be 20 mesh to 50 mesh Water-absorbing resin；Lower water accepting layer uses grammes per square metre as 140g/m², particle diameter be 20 mesh to 50 mesh hydroscopic high-molecular resin；Bottom is adopted It is 40g/m with grammes per square metre²Dust-free paper；Glue sprayer sprayed coating 1.5g/m in step 1)²Hot melt structure glue-line.Comparative example 2

Composite absorption core body (i.e. normal core body) is prepared in the essentially identical method of embodiment 6, is led the difference is that not formed Liquid passage (i.e. groove).

Absorption of the composite absorption core body to liquid obtained by measurement embodiment 6 and comparative example 2, spread and return and ooze performance. Measurement uses 4 liquid feeding methods.Concrete operations are as follows.

1st liquid feeding starts timing, and the time is designated as 0, and liquid volume added is each 60mL physiological saline, 23 DEG C ± 2 DEG C of temperature, and 4 minutes measurement liquid diffusion lengths, are measured with graduated scale.The 2nd liquid feeding is carried out within 5th minute, is carried out the 2nd time within the 9th minute Diffusion length measures, and carries out within the 10th minute returning for the first time oozing measurement.The 3rd liquid feeding is carried out within 12nd minute, carries out the 3rd within the 21st minute The measurement of secondary diffusion length, carry out within the 22nd minute the 2nd time and return to ooze measurement.The 4th liquid feeding is carried out within 24th minute, carries out the 4th within 33 minutes The measurement of secondary diffusion length, carry out within the 34th minute the 3rd time and return to ooze measurement.Liquid feeding method is perpendicular with 2.4 centimetres of an internal diameter is provided with Straight liquid-feeding tube, bottom are that flat board, flat board both sides are respectively pressed with the liquid-adding device of counterweight and carry out liquid feeding, each counterweight weight 0.6kg, liquid feeding Device adds counterweight gross weight 2kg, infiltration rate, i.e., oozes the time that time i.e. liquid oozes down completely after liquid feeding down, returns the test oozed Method is pressed 1 minute for filter paper to be pressed in the paper diaper surface after imbibition with 1.25kg counterweights, weighs the matter of filter paper before and after pressure counterweight Amount difference is to return milliosmolarity.As a result referring to table 2 below.

Table 2

Note：Each time point with start test for 0min minute timing；Soak time is to fully absorb the required time (s)；Diffusion length is the distance (cm) in the diffusion of testing time point liquid；Return milliosmolarity and return the amount (g) oozed for testing time point.

Embodiment 7 and 8

Embodiment 7 and 8 forms upper water accepting layer with except the SAP particles that pressurizing absorption amount is respectively 10 and 20 are respectively adopted Outside water accepting layer, other are carried out in the same manner as in example 6.

Embodiment 9 and 10

Embodiment 9 and 10 forms upper water suction except the SAP particles that swirl method infiltration rate is respectively 85 and 60 are respectively adopted Outside layer and lower water accepting layer, other are carried out in the same manner as in example 6.

Embodiment 11 and 12

Embodiment 11 and 12 forms upper water suction except the SAP particles that leachable content is respectively 15% and 10% are respectively adopted Outside layer and lower water accepting layer, other are carried out in the same manner as in example 6.

Embodiment 13 to 16

Embodiment 15 to 16 is except being respectively adopted particle mesh number (D₅₀) it is respectively that 20 and 120 SAP particles form water suction Outside layer and lower water accepting layer, other are carried out in the same manner as in example 6.

Embodiment 17 to 20

Embodiment 17 to 20 forms upper water suction except the SAP particles that expansion rate is respectively 10,20,100 and 150 are respectively adopted Outside layer and lower water accepting layer, other are carried out in the same manner as in example 6.

To measure the composite absorbent core obtained by embodiment 17 to 20 and comparative example 1 with identical method described in embodiment 6 Diffusion length (cm) that infiltration rate that body measures in 24min (the time required to oozing down completely (s)), 33min are measured and What 34min was measured returns milliosmolarity (g), and it is required to calculate oozing down completely for the core body of each embodiment of core body relative to comparative example 1 Time, which reduces percentage (%), diffusion length increase percentage (%) and returns milliosmolarity, reduces percentage (%).Pressurizing absorption amount is Pressurizing absorption amount under 0.7psi pressure.As a result referring to table 3 below.

Table 3

Surveyed with measuring the core body obtained by each embodiment and comparative example 2 with identical method described in embodiment 6 in 24min Returning of measuring of infiltration rate (ooze down completely the time required to (s)), the diffusion lengths (cm) that measure of 33min and 34min Milliosmolarity (g), and the required time of oozing down completely for calculating the core body of each embodiment of core body relative to comparative example 2 reduces percentage (%), diffusion length, which increase percentage (%) and return milliosmolarity, reduces percentage (%).In addition, the pressurizing absorption amount generation shown in table Pressurizing absorption amount under table 0.7psi pressure；Expansion rate is particle diameter and suction of the SAP particles after saturated absorption physiological saline The ratio of particle diameter before receipts.Leachable content represents 16 hours leachable contents.Detection method is as mentioned before.

As can be seen from the above table, it is obviously improved using the composite absorption core body obtained by the preferred embodiment of the present invention Liquid infiltration rate, infiltration rate can lift 50% to 90%；Meanwhile the diffusion length of liquid can improve 10% to 30% left side It is right；In addition, 10% to 80% or so can be reduced by returning milliosmolarity.

Embodiment 21 to 23

In addition to content shown in table 4 below and table 5, composite absorption core body is prepared in a manner of substantially the same manner as Example 6, Then paper diaper are fabricated to, the paper diaper include the composite absorption core body being clipped in innermost layer and outermost layer therein, both ends The stereoscopic leakproof pad of elastic waistline, both sides with Velcro patch and the Attacking Midfielder that can be used cooperatively with Velcro patch Veneer.Wherein, the SAP of used three types is purchased from Shandong Nuoer Biological Technology Co., Ltd., their relevant performance Referring to table 5 below.SAP infiltration rate can represent that the time is shorter with liquid surface static or stationary rotor time, and infiltration rate is got over It hurry up.As shown in table 5,511 type SAP infiltration rate is most slow, and 610S types SAP infiltration rate is most fast, 610 type SAP absorption speed Degree is placed in the middle.In addition, 511 type SAP centrifuge retention amount is of a relatively high, higher than 610S types and 610 type SAP, both rear centrifugations are protected Water is identical.These paper diaper are tested to absorbent properties, diffusion according to the method described in embodiment 6 and returns and oozes performance, are tied Fruit see the table below 6.

Table 4

Table 5

SAP models	Infiltration rate-liquid surface static (s)	Infiltration rate-stationary rotor (s)	Centrifuge retention amount
				NR511	32	62	34
NR610	24	46	30
				NR610S	20	34	30

Table 6

Time point and test event	Embodiment 21	Embodiment 22	Embodiment 23
				Core body quality (g)	23.63	23.21	23.17
0min absorptions/s	7	7	8
				5min absorptions/s	30	12	11
12min absorptions/s	38	12	10
				24min absorptions/s	33	12	9
4min diffusions/cm	20.0	21.0	21.1
				9min diffusions/cm	20.0	23.5	24.0
21min diffusions/cm	23.5	24.8	27.0
				33min diffusions/cm	26.5	29.0	31.0
10min, which is returned, oozes/g	0.10	0.09	0.15
				22min, which is returned, oozes/g	1.63	0.87	2.66
34min, which is returned, oozes/g	5.68	2.83	7.84

Comparing embodiment 21 and 22 is as can be seen that be equally that upper water accepting layer uses 511 type SAP, lower water accepting layer uses 610S The embodiment 21 and 22 of this combination of type SAP, there is the liquid of the composite absorption core body obtained by the embodiment 22 of liquid-conveying ducts Infiltration rate faster (soak time (second (s)), refers to oozing the time under liquid, the time is shorter, and infiltration rate is faster), diffusion length Spend longer, while it is lower to return milliosmolarity.

Comparing embodiment 22 and 23 can be seen that in the case of liquid-conveying ducts are provided with, when the SAP of upper water accepting layer suction The SAP that speed is slower than lower water accepting layer is received, and the SAP of upper water accepting layer centrifuge retention amount is higher than the SAP of lower water accepting layer centrifugation It is low using paper diaper finished product reverse osmosis amount made of such composite absorbent core body during moisture-holding capacity, it is dry-ness good (such as embodiment 22 Data are shown)；If upper water accepting layer and lower water accepting layer all using fast and centrifuge retention amount as infiltration rate as many 610 During type SAP, although the SAP of upper water accepting layer infiltration rate be faster than embodiment 22 used in SAP, returning milliosmolarity on the contrary can be relatively It is high.

The composite absorption core body prepared using the inventive method is had the following advantages that：It is dry-ness good, do not rise and stick together, not discontinue, Because having guide functions, liquid infiltration rate is fast, and diffusion is also superior to general composite absorption core body.It can apply to Various absorbent articles, such as amenities such as sanitary napkin idol paper diaper, particularly ultra-thin baby paper diaper, baby diaper Deng.

Claims

1. a kind of method for preparing composite absorption core body, the composite absorption core body includes top layer, upper water suction successively from top to bottom Layer, absorbent central layer, lower water accepting layer and bottom, it is characterised in that methods described comprises the following steps：

(1) in the tack coat of upper side sprayed coating first of bottom；

(2) the first imbibition dilatancy material for water accepting layer under formation is sprinkled with the bottom upper side of the tack coat of sprayed coating first Material, then lay absorbent central layer on lower water accepting layer top；

(3) tack coat of sprayed coating second and it is sprinkled with the second imbibition dilatancy material of the water accepting layer in formation on the downside on top layer Material；

(4) material that step (3) obtains is covered in the material that step (2) obtains by the downward mode in upper water accepting layer side Between on absorbed layer；

(5) it is compacted, so as to obtain the composite absorption core body.

2. according to the method for claim 1, it is characterised in that first tack coat and second tack coat are independently For hot melt structure glue-line.

3. method according to claim 1 or 2, it is characterised in that：

In the tack coat of sprayed coating first, first first baffle is placed in bottom layer width centre position along its length on the upper side of bottom； And/or before the tack coat of sprayed coating second, second is first placed along its length in the downside upper epidermis width centre position on top layer Baffle plate.

4. according to the method for claim 3, it is characterised in that：

The first baffle is identical or different with the shape of the second baffle, is preferably independently strip, Z-shaped shape, S-shaped Shape or groined type；

The first baffle is identical or different with the quantity of the second baffle, is preferably independently 1 to 4；And/or

The composite absorption core body full width is 8 to 15cm, and the width of the first baffle and the second baffle is only It is on the spot 1 to 4cm.

5. according to the method for claim 4, it is characterised in that the bottom layer width centre position edge only on the upper side of bottom Its length places first baffle.

6. according to the method for claim 1, it is characterised in that the first imbibition intumescent material and second imbibition Intumescent material is identical or different, and independently is hydroscopic high-molecular resin particle；

Preferably, the second imbibition intumescent material be 20-120 mesh hydroscopic high-molecular resin, and/or it is described first inhale Liquid intumescent material is the hydroscopic high-molecular resin of 20-120 mesh；Or the D of the second imbibition intumescent material₅₀For 25-50 Mesh, and/or the D of the first imbibition intumescent material₈₀For 30-100 mesh.

7. composite absorption core body according to any one of claim 1 to 6, it is characterised in that：

Spun-bonded non-woven fabrics or dust-free paper that the top layer and/or bottom are square grammes per square metre 10-90g or by polyethylene fibre, poly- It is one or more of through overheat in tacryl, polyvinyl chloride fibre, polyester fiber, natural or synthetic cotton or cellulose fibre Wind, hot rolling, spun lacing, acupuncture, spunbond or air web are molded the non-woven fabrics to be formed or textile cloth；And/or the intermediate absorption Layer is loft non-woven cloth of square grammes per square metre in 15-80g.

8. method according to any one of claim 1 to 7, it is characterised in that：

The linear expansion coefficient of the first imbibition intumescent material and the second imbibition intumescent material independently be 20 to 100；

The pressurizing absorption under 0.7psi pressure of the first imbibition intumescent material and the second imbibition intumescent material Amount independently is not less than 10g/g；

The swirl method infiltration rate of the first imbibition intumescent material and the second imbibition intumescent material independently is small In 85 seconds；And/or

16 hours leachable contents of the first imbibition intumescent material and the second imbibition intumescent material are independently small In 15%.

9. method according to any one of claim 1 to 8, it is characterised in that：

The centrifuge retention amount of the second imbibition intumescent material is higher than the centrifuge retention amount of the first imbibition intumescent material, And the liquid absorption rate of the second imbibition intumescent material is slower than the liquid absorption of the first imbibition intumescent material Speed.

10. the composite absorption core body as made from the method any one of claim 1 to 9.