CN111202632A

CN111202632A - Three-dimensional absorption core of 3D

Info

Publication number: CN111202632A
Application number: CN202010068957.5A
Authority: CN
Inventors: 邱金彪; 谢绍明
Original assignee: Quanzhou Youlijia New Material Co ltd
Current assignee: Quanzhou Youlijia New Material Co ltd
Priority date: 2020-01-21
Filing date: 2020-01-21
Publication date: 2020-05-29

Abstract

The invention relates to the field of disposable hygienic products, in particular to a 3D (three-dimensional) three-dimensional absorption core body which comprises a body, an upper coating layer and a lower coating layer, wherein the lower coating layer extends upwards from two sides to form a folding part, the folding part covers the upper coating layer, the body comprises a main absorption core layer, a fluffy non-woven fabric layer or a diversion non-woven fabric layer, a lower high-absorption resin layer and a bottom wood pulp fiber layer which are sequentially stacked from top to bottom, the main absorption core layer at least comprises an upper wood pulp fiber layer, a wood pulp fiber and high-absorption resin mixing layer and a lower wood pulp fiber layer which are sequentially arranged from top to bottom, a left row and a right row of diversion trenches are arranged on the body, each row of diversion trenches consists of a plurality of diversion trenches, the folding part and the upper coating layer sink at the positions of the diversion trenches, and the. The technical problem that the transverse diffusion effect and ventilation are difficult to improve when the existing multi-layer composite absorption core body absorbs more than two times is solved.

Description

Three-dimensional absorption core of 3D

Technical Field

The invention relates to the field of disposable hygienic products, in particular to a 3D (three-dimensional) absorption core body.

Background

The applicant is to: CN201810863864.4 discloses a panty-shape diapers absorb core, include the body and cover in the upper cover of body upper surface, cover in the lower coating of body lower surface, the lower coating upwards extends by both sides and forms the involution portion, the involution portion covers on the upper cover, the body is including the complex number layer wood pulp fiber layer that stacks gradually from top to bottom, the first layer of mixing, is equipped with the second between each wood pulp fiber layer and mixes the layer, be equipped with the guiding gutter that runs through on the body, the involution portion, the upper cover sink on the position of guiding gutter, and involution portion and lower coating bonding. It has solved the not good, easy reverse osmosis of absorption effect that exists among the prior art, the disconnected cotton technical problem of easy lump that rises. On the basis of this, the present applicant has found that it is difficult for the core in the domestic industry to spread the absorption site more greatly when absorbing urine and body fluid once, that is, after the absorption at each level is stable, and absorbing more than twice. This results in that the absorption coverage after one absorption defines the absorption site of the absorbent core, which reduces the utilization of the absorbent core. Therefore, how to improve the lateral and longitudinal diffusion effects at the time of the second and above absorption is the direction of research of the present applicant.

Disclosure of Invention

Therefore, aiming at the problems, the invention provides a 3D stereoscopic absorbing core body, which solves the technical problem that the transverse diffusion effect is difficult to improve when the existing multilayer composite absorbing core body absorbs for more than two times, and the utilization rate of the core body is low and cannot reach a high utilization rate level, such as more than 80%.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a three-dimensional absorption core of 3D, includes the body and covers in the upper coating layer of body upper surface, cover in the lower coating layer of body lower surface, the lower coating layer upwards extends by both sides and forms the package book portion, package book portion covers on the upper coating layer, the body is including the main absorption sandwich layer that stacks gradually from top to bottom, fluffy non-woven fabrics layer or water conservancy diversion non-woven fabrics layer, high absorption resin layer, bottom wood pulp fiber layer down, the main absorption sandwich layer is at least including upper wood pulp fiber layer, wood pulp fiber and the high absorption resin layer that set gradually from top to bottom, lower floor's wood pulp fiber layer, be equipped with about the body and two guiding gutters, each guiding gutter comprises a plurality of water conservancy diversion short troughs, package book portion, upper coating layer are sunken in the position of guiding short trough, and package book portion and lower coating layer have the.

Furthermore, each short diversion groove is formed in a hot pressing mode or an adhesive mode or an ultrasonic pressing mode, a plurality of hot pressing areas are arranged at the bottom of each short diversion groove, and each hot pressing area is arranged in a staggered mode from left to right in sequence along the length direction of the body.

Furthermore, a connecting part for connecting two sides of each flow guide short groove is formed between adjacent hot pressing areas on each flow guide short groove.

Furthermore, a middle wood pulp fiber layer is arranged in the wood pulp fiber and high-absorption resin mixed layer.

Furthermore, SAP particles are uniformly embedded in the fluffy non-woven fabric layer or the flow guide non-woven fabric layer.

Further, the upper coating layer and/or the lower coating layer are/is non-woven fabric or expanded paper.

Furthermore, the wrapping and folding part extends into the upper coating layer in the area between the two diversion trenches, and the end part of the wrapping and folding part is bonded with the upper coating layer.

Further, the upper wood pulp fiber layer is mixed with polytetrafluoroethylene fiber to form a mixed layer, and the weight ratio of the mixture is 20-50: 1, the polytetrafluoroethylene fiber is spiral crimped short fiber.

By adopting the technical scheme, the invention has the beneficial effects that:

1. the body is including the main absorbent core layer, fluffy non-woven fabrics layer or water conservancy diversion non-woven fabrics layer, lower high absorbent resin layer, the bottom wood pulp fibre layer that stack gradually from top to bottom, the main absorbent core layer is at least including upper wood pulp fibre layer, wood pulp fibre and the high absorbent resin who sets gradually from top to bottom mix layer, lower floor's wood pulp fibre layer, be equipped with about on the body two guiding gutter, such setting can be so that realize wood pulp fibre and high absorbent resin when once absorbing and mix the layer and realize quick, a large amount of absorption, and the low high absorbent resin layer realizes that the part absorbs. And when the second absorption is performed after a lapse of time, the absorption mode of the liquid is changed after the absorption tends to be stable. The first mode is given down high absorbent resin layer and lower floor's wood pulp fiber layer by the rapid diffusion of guiding gutter, and lower floor's wood pulp fiber layer has better lateral diffusion effect, can be with liquid diffusion to almost whole body this time, then upwards conduct here and give down high absorbent resin layer to realize the purpose of quick absorption, lock water. The second mode is from top to bottom through upper wood pulp fibrous layer, wood pulp fibre and high absorbent resin mix the layer, lower floor's wood pulp fibrous layer reaches fluffy non-woven fabrics or water conservancy diversion non-woven fabrics layer, then oozes down once more, is absorbed by low high absorbent resin, and this kind of mode is when going on, can also play certain horizontal diffusion effect owing to upper wood pulp fibre, lower floor's wood pulp fibre's effect to can realize the improvement of the utilization ratio of body. Compared with the existing absorption core, the upper layer wood pulp fiber of the absorption core is plant fiber, and can effectively absorb SAP residual monomers, the SAP residual monomers mainly refer to residual acrylic acid monomers which are not polymerized in SAP or generated in the later period, acrylic acid has irritation to skin, if too much residual monomers in SAP can cause damage to skin of an infant, and if the infant wears a paper diaper for a long time, too much residual monomers can cause red buttocks.

2. Each row of diversion trenches consists of a plurality of diversion trenches, so that the agglomeration of the core body after absorption is reduced, and the diversion trenches can effectively realize the rapid diffusion and absorption matched with the lower wood pulp fiber layer and the lower high absorption resin layer during secondary absorption.

3. Each water conservancy diversion short trough adopts the mode shaping of hot pressing or sticky or ultrasonic wave pressfitting, be equipped with a plurality of hot nips on each water conservancy diversion short trough bottom, each hot nip is along body length direction dislocation set about in proper order, just so can make the week edge of hot nip have formed the bonding position of package portion of rolling over and lower coating, this kind of purpose that does not pierce through completely, it is feasible, lie in on each water conservancy diversion short trough and form the connecting portion that are used for connecting water conservancy diversion short trough both sides between the adjacent hot nip, liquid will be along connecting portion diffusion everywhere in water conservancy diversion short trough department like this, thereby make the rapid diffusion ability of body strengthen, air permeability improves, and the liquid at body middle part can be up to diffusion down, will be to both sides diffusion when lower wood pulp fiber layer middle part, thereby realize a better transverse diffusion effect.

4. Still be equipped with one deck middle level wood pulp fiber layer in wood pulp fiber and the high absorption resin mixed layer, set up like this and can be favorable to the increase of lateral diffusion effect, also be favorable to preventing reverse osmosis. The middle wood pulp fiber layer is isolated from the upper part and the lower part, so that the water locking part can not be gathered on the lower end surface of the upper wood pulp fiber layer.

5. The SAP particles are embedded in the fluffy non-woven fabric layer or the diversion non-woven fabric layer in an evenly distributed mode, a better drainage effect can be achieved due to the arrangement of the SAP particles, liquid can have the tendency of rapid permeation from top to bottom, and therefore absorption of the liquid is facilitated, and the comfort level of wearing can be improved due to the fluffy non-woven fabric layer or the diversion non-woven fabric layer. When in molding, the SAP particles are uniformly scattered on the fluffy non-woven fabric layer or the diversion non-woven fabric layer, and then the SAP particles are embedded into the fluffy non-woven fabric layer or the diversion non-woven fabric layer in a high-frequency oscillation mode. Thereby forming an intermediate layer which can realize effective ventilation, has high softness and can improve the infiltration effect.

6. The wrapping and folding part extends into the region of the upper coating layer between the two diversion trenches, and the end part of the wrapping and folding part is bonded with the upper coating layer, so that the non-attachment of the wrapping and folding part and the diversion trenches is reduced, the air existing due to the gap between the wrapping and folding part and the upper coating layer is reduced, and the diversion effect is reduced;

7. the upper wood pulp fiber layer is mixed with polytetrafluoroethylene fiber to form a mixed layer, and the weight ratio of the mixture is 20-50: 1, the polytetrafluoroethylene fiber is spiral crimped short fiber. By the arrangement, the upper wood pulp fiber layer has certain hydrophobic property, but the hydrophobic property can improve the infiltration speed of liquid, reduce the retention time of the liquid, enlarge the air permeability of the upper wood pulp fiber layer and reduce the reverse osmosis of the liquid. Meanwhile, the SAP dissolved matter can be well contacted with the skin, and the probability of red buttocks is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view taken at A-A in FIG. 1;

FIG. 3 is a schematic structural diagram of a short diversion trench;

FIG. 4 is a schematic view of the structure of the lofty nonwoven layer layout;

FIG. 5 is a schematic structural view of the arrangement of the lower high absorbent resin layer and the bottom wood pulp fiber layer;

fig. 6 is a schematic cross-sectional view of the portion without the short diversion trench in fig. 1.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 6, the present embodiment provides a 3D absorbent core, which includes a body, an upper covering layer 1 covering the upper surface of the body, and a lower covering layer 2 covering the lower surface of the body, wherein the upper covering layer 1 and/or the lower covering layer 2 are non-woven fabrics or bulked paper, and both the upper covering layer 1 and the lower covering layer 2 are non-woven fabrics. Lower coating 2 is upwards extended by both sides and is formed folding portion 21, folding portion 21 covers on upper coating 1, the body is including the main absorbent core layer that stacks gradually from top to bottom, fluffy non-woven fabrics layer 4, lower high absorbent resin layer 5, bottom wood pulp fiber layer 6, the main absorbent core layer is at least including upper wood pulp fiber layer 31, wood pulp fiber and the high absorbent resin layer 32 that set gradually from top to bottom, lower floor's wood pulp fiber layer 33, upper wood pulp fiber layer 31 is sneaked into polytetrafluoroethylene fiber and is formed the mixture layer, and the weight ratio of mixture is 20 ~ 50: 1, the mixing ratio in this example is about 30: 1, it does not have very accurate numerical value, and the error only needs in certain extent, and the technical staff in this field can increase and decrease according to actual need. The polytetrafluoroethylene fiber is spiral crimped short fiber. A middle wood pulp fiber layer 34 is also arranged in the wood pulp fiber and high absorption resin mixed layer 32. SAP particles 41 are uniformly embedded in the fluffy non-woven fabric layer 4, in the embodiment, the fluffy non-woven fabric layer 4 is selected as a carrier of the SAP particles 41, and the fluffy non-woven fabric layer can be replaced by a flow guide non-woven fabric. When the molding is carried out, the SAP particles are uniformly scattered on the fluffy non-woven fabric layer, and then the SAP particles are embedded into the fluffy non-woven fabric layer in a high-frequency oscillation mode.

The body is provided with a left guide groove and a right guide groove, each guide groove is composed of a plurality of guide short grooves 7, the wrapping and folding part 21 and the upper coating layer 1 sink at the positions of the guide short grooves 7, and the wrapping and folding part 21 and the lower coating layer 2 are mutually adhered. Each short diversion groove 7 is formed by hot pressing or gluing or ultrasonic pressing, in the embodiment, the hot pressing is adopted, a plurality of hot pressing areas 71 are arranged at the bottom of each short diversion groove 7, and each hot pressing area 71 is arranged along the length direction of the body in a staggered manner from left to right in sequence. The connection parts 72 for connecting the two sides of the diversion short troughs are formed on each diversion short trough between the adjacent hot pressing areas 71. The wrapping and folding part 21 extends into the upper wrapping layer 1 in the area between the two diversion trenches, and the end part of the wrapping and folding part 21 is bonded with the upper wrapping layer 1.

The above-mentioned forming method of the body has no too many specific features, which is a conventional technique in the field and will not be described herein. Only the fluffy non-woven fabric is embedded with SAP particles through a special process, and the SAP particles are uniformly scattered on the fluffy non-woven fabric layer during forming and then are embedded into the fluffy non-woven fabric layer in a high-frequency oscillation mode.

The diversion grooves can also be arc-shaped, that is, the diversion short grooves can be arc-shaped, and of course, other shapes can also be adopted. The diversion short grooves can be arranged at intervals, and under the limit condition, the diversion short grooves are connected with each other to form a whole.

The hot nip can be perforated or not, i.e. the area of the hot nip is not perforated, but forms a trough by pressing. When the liquid is penetrated, the body fluid can flow downwards and then flows leftwards and rightwards, and the aim of better left-right diffusion can be fulfilled.

The SAP particles 41 on the bulky nonwoven fabric layer 4 are distributed to avoid the flow guide grooves, that is, the SAP particles 41 are not distributed in the areas formed by the flow guide grooves, so that an avoiding strip-shaped area 42 for avoiding the flow guide grooves is formed, as shown in fig. 4. Avoiding the stripe-like region 42 portion can be advantageous for improvement of air permeability, and even after the SAP particles 41 absorb urine, there can be a certain space for air permeability.

The lower high absorbent resin layer 5 may be laid over the bottom wood pulp fiber layer 6, or as shown in fig. 5, a void portion 61 may be formed in each short flow guide groove. Alternatively, a blank portion may be formed at each guide groove, as in a similar structure shown in fig. 4.

The arrows shown in fig. 2 and fig. 6 are the diffusion diagrams of liquid during absorption, the middle part of the lower wood pulp fiber layer is often high in content due to the fact that the moisture absorption speed is high, the content tends to be high, the lower wood pulp fiber layer tends to diffuse to the periphery, and after the diffusion, the lower wood pulp fiber layer can be upwards absorbed by the lower high-absorbent resin layer, so that a diffusion guiding process is formed, the absorption speed of the absorbent core can be higher, and the utilization rate is higher.

In absorption, there are two main aspects of absorption. The first mode is given down high absorbent resin layer and lower floor's wood pulp fiber layer by the rapid diffusion of guiding gutter, and lower floor's wood pulp fiber layer has better lateral diffusion effect, can be with liquid diffusion to almost whole body this time, then upwards conduct here and give down high absorbent resin layer to realize the purpose of quick absorption, lock water. The second mode is from top to bottom through upper wood pulp fibrous layer, wood pulp fibre and high absorbent resin mix the layer, lower floor's wood pulp fibrous layer reaches fluffy non-woven fabrics or water conservancy diversion non-woven fabrics layer, then oozes down once more, is absorbed by low high absorbent resin, and this kind of mode is when going on, can also play certain horizontal diffusion effect owing to upper wood pulp fibre, lower floor's wood pulp fibre's effect to can realize the improvement of the utilization ratio of body.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a three-dimensional absorption core of 3D, includes the body and covers in the upper cover layer of body upper surface, cover in the lower coating layer of body lower surface, the lower coating layer is by both sides upwards extension formation package folding portion, package folding portion covers on the upper cover layer, its characterized in that: the body is including the main absorbent core layer, fluffy non-woven fabrics layer or water conservancy diversion non-woven fabrics layer, lower high absorbent resin layer, bottom wood pulp fibre layer that stack gradually from top to bottom, the main absorbent core layer is at least including upper wood pulp fibre layer, wood pulp fibre and the high absorbent resin layer that sets gradually from top to bottom, lower floor's wood pulp fibre layer, be two guiding gutters about being equipped with on the body, each is listed as the guiding gutter and comprises a plurality of water conservancy diversion short slots, the position department of package portion of folding, upper coating in the water conservancy diversion short slot is sunken, and package portion of folding and lower coating exist the position of mutual bonding.

2. A 3D volumetric absorbent core according to claim 1, characterized in that: each diversion short groove is formed by adopting a hot pressing mode or an adhesive mode or an ultrasonic pressing mode, a plurality of hot pressing areas are arranged at the bottom of each diversion short groove, and each hot pressing area is arranged along the length direction of the body in a staggered mode in sequence from left to right.

3. A 3D volumetric absorbent core according to claim 2, characterized in that: and a connecting part for connecting two sides of each short diversion groove is formed between the adjacent hot pressing areas on each short diversion groove.

4. A 3D volumetric absorbent core according to claim 1, 2 or 3, characterized in that: and a middle wood pulp fiber layer is also arranged in the wood pulp fiber and high-absorption resin mixed layer.

5. A 3D volumetric absorbent core according to claim 1, 2 or 3, characterized in that: SAP particles are uniformly embedded in the fluffy non-woven fabric layer or the flow guide non-woven fabric layer.

6. A 3D volumetric absorbent core according to claim 1, 2 or 3, characterized in that: the upper coating layer and/or the lower coating layer are/is non-woven fabric or expanded paper.

7. A 3D volumetric absorbent core according to claim 1, 2 or 3, characterized in that: the wrapping and folding part extends into the upper coating layer in the area between the two diversion trenches, and the end part of the wrapping and folding part is bonded with the upper coating layer.

8. A 3D volumetric absorbent core according to claim 1, 2 or 3, characterized in that:

the upper wood pulp fiber layer is mixed with polytetrafluoroethylene fiber to form a mixed layer, and the weight ratio of the mixture is 20-50: 1, the polytetrafluoroethylene fiber is spiral crimped short fiber.