CN215020557U - Absorption inner core and absorption core - Google Patents

Abstract

The utility model discloses an absorption inner core, which comprises a first base layer, a plurality of first absorbers, a second base layer and a plurality of second absorbers, wherein the first absorbers are transverse strip absorbers, and the second absorbers are longitudinal strip absorbers; a plurality of first absorbers are fixed on the first base layer to form a first pre-inner core; a plurality of second absorbers are fixed on the second base layer to form a second pre-inner core; the first pre-inner core and the second pre-inner core are compounded into a whole, and the plurality of first absorbers and the plurality of second absorbers are transversely and longitudinally arranged in a staggered mode in sequence. The absorber in the absorption core is reasonably distributed, liquid is reasonably dredged and drained, and the conduction performance is good. The utility model also discloses an absorb the core, the absorption rate is fast, and the reverse osmosis volume is low, and the conductivity is strong, and material utilization is high, can not appear in the use the fault play the phenomenon of sticking together.

Description

Absorption inner core and absorption core

Technical Field

The utility model relates to a health supplies technical field especially relates to an absorb inner core, absorb core and absorb preparation method and application of core.

Background

Disposable absorbent sanitary articles are generally composed of several layers with different functions, such as an upper top layer, a lower bottom layer and an absorbent core between them, and even other interlaminar structures. Of these layered structures, the most important structure is the absorbent core. The absorption cores of disposable absorption sanitary products on the market at present mainly comprise the following types: the first type is an absorption core formed by mixing wood pulp fibers and high-molecular water-absorbing resin, and the absorption core has good repeated absorption performance and good diffusion performance; the second type is a composite absorption core mixed by wet strength paper, hot air fluffy cloth and high polymer water-absorbent resin, which is thinner than the first type, and meanwhile, the paper diaper does not have the situation of lump-forming fault in the use process; and the third type is a three-dimensional wrapping and forming core body, which is an absorption core formed by compounding high-molecular water-absorbing resin and non-woven fabric through hot melt adhesive, and the thickness of the absorption core is thinner than that of the second type absorption core.

However, the three existing types of absorbent cores have the following drawbacks:

(1) the first type of absorption core is a mixture of wood pulp fiber and macromolecular water-absorbing resin, so that the disposable sanitary product is thicker, is relatively moist and stuffy in the using process and has a lump-forming fault in the using process;

(2) the second type of absorption core has poor multiple absorption capacity and insufficient diffusion length, so that the utilization rate of the high-molecular water-absorbent resin is low;

(3) in the third type of absorbent core, the first absorption rate is relatively poor, and there is a risk of liquid leakage when applied to disposable sanitary products.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an absorption inner core, the absorption body in the absorption inner core is reasonably distributed, the liquid is reasonably dredged and drained, and the conductivity is good.

A second object of the utility model is to provide an absorb core, rational in infrastructure, the absorption rate is fast, and the reverse osmosis volume is low, and the conductivity is strong, and material utilization is high, the phenomenon that the fault, play to stick together can not appear in the use.

The third purpose of the utility model is to provide a preparation method of the absorption core body, which has simple and convenient process flow and is suitable for industrial production.

The fourth purpose of the utility model is to use the absorbing core body in the sanitary articles.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

an absorption inner core comprises a first base layer, a plurality of first absorbers, a second base layer and a plurality of second absorbers, wherein the first absorbers are transverse strip absorbers, and the second absorbers are longitudinal strip absorbers; a plurality of first absorbers are fixed on the first base layer to form a first pre-inner core; a plurality of second absorbers are fixed on the second base layer to form a second pre-inner core; the first pre-inner core and the second pre-inner core are compounded into a whole up and down, and the plurality of first absorbers and the plurality of second absorbers are arranged in a staggered mode in the transverse direction and the longitudinal direction.

Furthermore, both ends of the first base layer in the length direction are provided with first wrapping folding parts, and the first wrapping folding parts are folded downwards to completely cover the bottom surface of the second base layer; or, a bottom portion of the second base layer is covered by the first wrap fold; the first wrap fold and an end of the second base layer form a closed loop end.

Further, the first absorbent has an absorbency rate that is not equal to the absorbency rate of the second absorbent.

Further, along the length direction of the first base layer, the first base layer is divided into a left side area, a middle area and a right side area; a plurality of first absorbers are arranged on the left area, the middle area and the right area; the first absorbers are arranged in a plurality of rows on the left side area, and the number of the first absorbers on each row is more than or equal to 1; the first absorbers are arranged in a plurality of rows on the right side area, and the number of the first absorbers on each row is more than or equal to 1; the first absorbers are arranged in a plurality of rows in the middle area, and the number of the first absorbers in each row is 1;

dividing the second base layer into an upper side area, a central area and a lower side area along the width direction of the second base layer; a plurality of second absorbers are arranged on the upper side area and the lower side area; a plurality of the second absorbers are arranged in a plurality of rows on the upper side area, and the number of the second absorbers in each row is greater than or equal to 1; a plurality of the second absorbers are arranged in a plurality of rows on the lower side region, and the number of the second absorbers in each row is greater than or equal to 1.

Further, for the first base layer, two adjacent columns of first absorbers on the left side area are provided, wherein the number of the first absorbers in one column is recorded as A, the number of the first absorbers in the other column is recorded as B, and A is equal to or not equal to B; two columns of first absorbers adjacent to each other on the right side area, wherein the number of the first absorbers in one column is marked as C, the number of the first absorbers in the other column is marked as D, and C is equal to or not equal to D;

for the second base layer, two adjacent rows of second absorbers on the upper side region, wherein the number of the second absorbers in one row is marked as E, the number of the second absorbers in the other row is marked as F, and E is equal to or not equal to F; and two adjacent rows of second absorbers on the lower side area, wherein the number of the second absorbers in one row is marked as G, the number of the second absorbers in the other row is marked as H, and G is equal to or not equal to H.

Further, the first absorber and the second absorber are each composed of polymer resin particles.

The second purpose of the utility model is realized by adopting the following technical scheme:

an absorption core body comprises the absorption core, a flow guide layer, a conductive layer and a base material; the flow guide layer, the absorption inner core, the conduction layer and the base material are sequentially stacked up and down.

Furthermore, both ends of the base material in the length direction are provided with second wrapping folding parts, and the second wrapping folding parts are folded upwards to completely cover the top surface of the absorption inner core; alternatively, a top surface portion of the absorbent core is covered by the second wrapper fold; the second wrapper fold forms a closed loop end with an end of the absorbent core.

Further, the flow guide layer is a fluffy non-woven fabric layer or a foam layer; the conducting layer is a wood pulp fiber layer; the base material is hydrophilic non-woven fabric; for the absorption inner core, the first base layer and the second base layer are both hydrophilic non-woven fabrics, and the first absorber and the second absorber are both composed of polymer resin particles.

Further, the width of the conductive layer is less than or equal to that of the absorption inner core, and more preferably, the width of the conductive layer does not exceed that of the polymer resin layer.

Further, the conducting layer is arranged in a tiled structure or a longitudinal strip arrangement structure. That is, the conducting layer can be a wood pulp fiber flat-laying structure or a wood pulp fiber longitudinal strip-shaped structure.

The third purpose of the utility model is realized by adopting the following technical scheme:

a method of making an absorbent core comprising:

the manufacturing method of the absorption inner core comprises the following steps: fixing a plurality of first absorbers on the first base layer to form a first pre-inner core; fixing a plurality of second absorbers on the second base layer to form a second pre-inner core; combining the first pre-inner core and the second pre-inner core into a whole up and down, so that the plurality of first absorbers and the plurality of second absorbers are sequentially staggered and arranged in the transverse direction and the longitudinal direction; the left end and the right end of the first base layer in the length direction are wrapped and folded towards the second pre-inner core to form an absorption inner core;

a composite molding step: arranging a conducting layer on the base material, placing the absorption inner core on the conducting layer, and wrapping and folding the left end and the right end of the base material in the length direction towards the absorption inner core to form a pre-absorption core body; and arranging a flow guide layer on the pre-absorption core body to obtain the composite material.

The fourth purpose of the utility model is realized by adopting the following technical scheme:

the utility model discloses general absorb the core and use in the health supplies, including infant's panty-shape diapers, pull-up diaper, sanitary towel, menstrual period trousers, adult's panty-shape diapers, incontinence trousers and urine pad.

Compared with the prior art, the beneficial effects of the utility model reside in that:

(1) the utility model provides an absorb inner core, including first absorber and second absorber, first absorber and second absorber are horizontal, vertically crisscross distribution, and the distribution mode is reasonable, and liquid can carry out mediation, drainage, the conduction of liquid wherein along the fixed point distribution of absorber, and then progressively is absorbed. Gaps are formed between two adjacent absorbers and can be used as a liquid guide channel, so that the liquid absorption speed is further improved.

(2) The upper layer of the absorption core body provided by the utility model is the diversion layer, which has high diversion speed; the middle layer is an absorption inner core, and the absorbers of the absorption inner core are transversely and longitudinally staggered, so that liquid can be continuously and gradually absorbed in the absorption inner core; the lower layer material is a conducting layer, can promote the horizontal longitudinal diffusion performance of urine in the use process of the absorption core body, and can uniformly diffuse, thereby improving the utilization rate of the absorption core body. The conducting layer is not added with the macromolecular water-absorbent resin, and the phenomena of fault and lump rise can not occur in the wearing and using process. The absorption core body has reasonable structure, high liquid absorption speed and strong conduction capability, liquid can not concentrate on the infiltration initial point, and the liquid is uniformly diffused and has low rewet capacity.

(3) The preparation method of the absorption core body provided by the utility model has simple and convenient process flow and is suitable for industrial production.

Drawings

Fig. 1 is an overall schematic view of an absorbent core according to an embodiment of the present invention;

fig. 2 is a schematic view of a first pre-core provided in an embodiment of the present invention;

fig. 3 is a schematic view of a second pre-core provided in an embodiment of the present invention;

fig. 4 is a schematic diagram of the first pre-inner core and the second pre-inner core after being combined according to the embodiment of the present invention;

fig. 5 is a schematic view of an absorbent core provided in an embodiment of the present invention;

figure 6 is a schematic view of an absorbent core according to the invention provided in comparative example 3.

In the figure: 10. a first base layer; 11. a first wrap fold; 20. a second base layer; 30. an intermediate absorbent layer; 31. a first absorbent; 32. a second absorbent body; 33. an absorbent core; 40. a flow guiding layer; 50. a conductive layer; 60. a substrate; 61. a second wrap fold; 101. a first hydrophilic polymer water-absorbent resin fixing layer; 102. a first high molecular water-absorbent resin layer; 103. a second high molecular water-absorbing resin layer; 104. a second hydrophilic polymer water-absorbent resin fixing layer; 1041. wrapping the folded part.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict. The raw materials, equipments and the like used in the following examples are commercially available unless otherwise specified.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly. In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

In addition, the transverse direction in the embodiment of the present invention is the width direction, and the longitudinal direction is the length direction. Taking the application of the absorbent core or the absorbent core in the diaper as an example, the direction from the front waist portion to the rear waist portion of the diaper is the length direction, and the direction between the two leg-passing holes is the width direction.

As shown in fig. 1 to 4, an absorbent core 33 comprises a first base layer 10, a plurality of first absorbers 31, a second base layer 20 and a plurality of second absorbers 32, wherein the plurality of first absorbers 31 are transverse strip-shaped absorbers, and the plurality of second absorbers 32 are longitudinal strip-shaped absorbers; a plurality of first absorbers 31 are fixed on the first base layer 10 to form a first pre-inner core; a plurality of second absorbents 32 fixed to the second base layer 20 to form a second pre-core; the first pre-inner core and the second pre-inner core are compounded into a whole up and down, and the plurality of first absorbers 31 and the plurality of second absorbers 32 are arranged in a staggered mode in the transverse direction and the longitudinal direction.

As shown in fig. 2, which is a schematic plan view of the first pre-core, the first absorbers 31 distributed in a transverse strip shape are fixedly arranged on the first base layer 10; fig. 3 is a plan view of a second pre-core, with longitudinally oriented strips of second absorbent 32 fixedly arranged on the second substrate 20. During manufacturing, hot melt adhesive can be applied to the first base layer 10, and then the first absorber 31 is fixed on the first base layer 10 according to a preset arrangement mode to form a first pre-inner core; then, applying hot melt adhesive on the second base layer 20, and fixing the second absorber 32 on the second base layer 20 according to a preset arrangement mode to form a second pre-inner core; next, the first pre-core and the second pre-core can be compounded into a whole by hot melt adhesive, and since the first absorber 31 and the second absorber 32 are arranged in a staggered manner, as shown in fig. 1 and 4, after the first pre-core and the second pre-core are compounded, the first absorber 31 and the second absorber 32 can be staggered and do not overlap with each other, i.e. the first absorber 31 and the second absorber 32 together form an intermediate absorber layer 30, and the intermediate absorber layer 30 is clamped between the first base layer 10 and the second base layer 20. Meanwhile, gaps are formed between the absorption body and the absorption body, and the gaps can be used as flow guide channels of liquid.

The embodiment of the utility model provides an absorb inner core 33 includes first absorber 31 and second absorber 32, and first absorber 31 and second absorber 32 are horizontal, vertically crisscross distribution, and the distribution mode is reasonable, and liquid can carry out mediation, drainage, the conduction of liquid wherein along the fixed point distribution of absorber, and then progressively is absorbed. Gaps are formed between two adjacent absorbers and can be used as a liquid guide channel, so that the liquid absorption speed is further improved.

Further, as shown in fig. 1, both ends of the first base layer 10 in the length direction are provided with first wrapping folded portions 11, and the first wrapping folded portions 11 are folded downwards to completely cover the bottom surface of the second base layer 20; alternatively, the bottom surface portion of the second base layer 20 is covered by the first wrap fold 11; the first wrap fold 11 forms a closed loop end with the end of the second substrate 20. During manufacturing, the first wrapping folding part 11 on the first base layer 10 can be wrapped and folded towards the second base layer 20 through the wrapping and folding mechanism to form a closed loop structure, namely, the closed loop process treatment is carried out on the peripheral edge of the absorption core, so that the first absorption body 31 and the second absorption body 32 clamped between the first absorption body and the second absorption body are prevented from leaking outwards, the three-dimensional folding wrapping absorption core structure is formed, and the overall stability is high. As shown in fig. 1, the first wrapper folded portion 11 is folded down to completely cover the bottom surface of the second base layer 20, which can prevent leakage of the absorbent body and save materials. Of course, the second wrapping folded portion 61 may be extended to completely wrap the bottom surface of the second base layer 20, so that the wrapping ability is further improved in the fully wrapped manner, and the absorber is prevented from leaking to the outside to the maximum extent. And the ends of the first wrapper fold 11 and the second substrate 20 adopt a closed loop process that can act as a last barrier to liquid absorption and prevent spillage.

Further, the water absorption rate of the first absorbent 31 is not equal to the water absorption rate of the second absorbent 32. Preferably, the first absorbent 31 absorbs water at a rate greater than that of the second absorbent 32, that is, the transverse stripes absorb water at a rate greater than that of the longitudinal stripes. As shown in fig. 4, for the middle absorbent layer 30, the central region is a transverse strip-shaped absorbent, and the absorbent in the middle region can still maintain a certain absorption amount in multiple times of liquid absorption; meanwhile, liquid can be diffused towards the longitudinal direction at the initial liquid infiltration point under the action of pressure, as shown in fig. 4, the longitudinal strip-shaped absorbers are arranged on the upper side and the lower side of the transverse strip-shaped absorber in the middle area, and the transverse strip-shaped absorbers are arranged on the left end and the right end.

Further, as shown in fig. 2, the first base layer 10 is divided into a left region, a middle region and a right region along the length direction of the first base layer 10; a plurality of first absorbers 31 are arranged on the left area, the middle area and the right area; the plurality of first absorbers 31 are arranged in a plurality of columns on the left side area, two adjacent columns of the first absorbers 31 are provided, wherein the number of the first absorbers 31 in one column is marked as A, the number of the first absorbers 31 in the other column is marked as B, and A is equal to or not equal to B; the plurality of first absorbents 31 are arranged in a plurality of columns on the right side region, the adjacent two columns of first absorbents 31 are provided, wherein the number of the first absorbents 31 in one column is marked as C, the number of the first absorbents 31 in the other column is marked as D, and C is equal to or not equal to D; the plurality of first absorbers 31 are arranged in a plurality of rows in the central region, and the number of the first absorbers 31 in each row is 1. For example, 15 rows of first absorbers 31 may be provided in the left side area of the first base layer 10, only one first absorber 31 may be provided in the 1 st row near the endmost portion, 4N absorbers may be provided in the adjacent second row, 3N absorbers may be provided in the adjacent third row, and then the following rows may be sequentially provided in accordance with 4N and 3N absorbers; 16 rows of first absorbers 31 may be provided in the right side area of the first base layer 10, only one first absorber 31 may be provided in the 1 st row near the endmost portion, 4M absorbers may be provided in the adjacent second row, 3M absorbers may be provided in the adjacent third row, and then the next rows may be sequentially provided in accordance with 4M and 3M absorbers in turn; n and M are integers of 1 or more. While the number of the absorbent bodies in each row is 1 in the middle region of the first base layer 10, after absorbing liquid, the liquid first infiltrates downward at the first absorbent bodies 31 in the middle region and then rapidly spreads in the left and right directions. The arrangement of the first absorbers 31 on the first base layer 10 is just an example, the number of the rows of the first absorbers 31 on the left side region, the middle region and the right side region is only an example, and the number of the first absorbers 31 on each row needs to be set according to actual conditions. The first absorber 31 is preferably a rectangular absorber, and the length and width thereof are set according to actual conditions.

As shown in fig. 3, the second base layer 20 is divided into upper, central and lower side regions along the width direction of the second base layer 20; a plurality of second absorbent bodies 32 are arranged on the upper side area and the lower side area; the plurality of second absorbents 32 are arranged in a plurality of rows on the upper side region, two adjacent rows of the second absorbents 32 are arranged, wherein the number of the second absorbents 32 in one row is denoted as E, the number of the second absorbents 32 in the other row is denoted as F, and E is equal to or different from F; the plurality of second absorbents 32 are arranged in a plurality of rows on the lower side area, and two adjacent rows of the second absorbents 32 are arranged, wherein the number of the second absorbents 32 in one row is denoted by G, the number of the second absorbents 32 in the other row is denoted by H, and G is equal to or different from H. For example, 4 rows of second absorbers 32 may be provided in the upper region of the second base layer 20, only one second absorber 32 may be provided in the 1 st row near the topmost, 13X absorbers may be provided in the adjacent second row, 7X absorbers may be provided in the adjacent third row, and then the next rows may be provided in order of 4X and 3X absorbers; it is possible to arrange 4 rows of second absorbers 32 in the lower region of the second base layer 20, only one second absorber 32 in the 1 st row near the end, 13Y absorbers in the adjacent second row, 7Y absorbers in the adjacent third row, and then the next rows are arranged in order of 13Y and 7Y absorbers; x and Y are integers of 1 or more. The second absorbent members 32 are disposed on the second base layer 20 only by way of example, the number of the second absorbent members 32 disposed on the upper, central and lower regions is set according to the actual situation. The second absorber 32 is preferably a rectangular absorber, and the length and width thereof are set according to actual conditions.

The embodiment of the utility model provides an absorb inner core 33, because the imbibition speed of first absorber 31 will be greater than the imbibition speed of second absorber 32, after absorbing liquid, liquid is at first in the regional first absorber 31 department infiltration in the middle of first basic unit 10, liquid then rapidly toward the diffusion of the first absorber 31 department of left and right both sides direction, and the second absorber 32 that is located both sides about, the imbibition speed is slower, can make more preceding back both sides direction conduction absorption of liquid, make the middle part region keep certain dry and comfortable.

Further, the first absorber 31 and the second absorber 32 are each composed of polymer resin particles. That is, the first absorbent 31 is a first SAP absorbent, the second absorbent 32 is a second SAP absorbent, and the polymer resin particles can be obtained by purchase. The first SAP absorber has a water absorption rate higher than that of the second SAP absorber, and the first SAP absorber 31 and the second SAP absorber 32 may be made of polymer resins obtained from different manufacturers, or polymer resins of the same manufacturer and different types may be obtained. Alternatively, the first absorbent 31 and the second absorbent 32 may be made different in composition by adjusting the components thereof, respectively, so as to achieve the effect of different water absorption rates. In the manufacturing, the first SAP absorber may be transferred onto the first base layer 10 and the second SAP absorber may be transferred onto the second base layer 20 by a roll-to-roll transfer process, and the absorbers and the base layers may be fixed by a hot melt adhesive. In actual manufacturing, the intermediate absorbing layer 30 of the absorbing core 33 is divided into two layers for transfer, namely, the first absorbing body 31 is transferred through one roller to form a first pre-core, the second absorbing body 32 is transferred through the other roller to form a second pre-core, and then the first pre-core and the second pre-core are compounded into a whole. The grammage of the first absorbent 31 and the second absorbent 32 can be set between 100-300gsm, within which the product is absorbent and soft and comfortable.

As a preferred embodiment, the first base layer 10 and the second base layer 20 are configured as hydrophilic nonwoven fabrics, specifically, may be configured as hydrophilic spun-bonded nonwoven fabrics, and for the purpose of improving production efficiency, the first base layer 10 nonwoven fabrics and the second base layer 20 nonwoven fabrics are configured as at least 15gsm or more, which also can ensure good product quality.

As shown in fig. 5, an absorbent core comprises an absorbent core 33, and further comprises a conductive layer 40, a conductive layer 50 and a substrate 60; the flow guide layer 40, the absorbent core 33, the conductive layer 50, and the base material 60 are sequentially stacked one on another. After the absorbent core absorbs liquid, the liquid passes through the flow guide layer 40, then passes through the absorbent core 33 and then enters the conductive layer 50, and the liquid is gradually absorbed and diffused.

Further, as shown in fig. 5, both ends of the base material 60 in the length direction are provided with second wrapping folded portions 61, and the second wrapping folded portions 61 are folded upward to completely cover the top surface of the absorbent core 33; alternatively, the top surface portion of the absorbent core 33 is covered with the second wrapper fold 61; the second wrapper fold 61 forms a closed loop end with the end of the absorbent core 33. The second wrapping and folding portion 61 wraps the conductive layer 50 and the absorbing core 33, so that the stability of the structure is ensured. I.e., the substrate layer is a fixed wrapping of the conductive layer 50 and the absorbent core 33.

Further, the flow guide layer 40 is a fluffy non-woven fabric layer or a cotton-padded layer, the flow guide layer 40 needs to have a certain thickness, the thickness needs to be kept larger than 1mm under the pressure of 50N, and it is ensured that discomfort can not be caused to infants due to granular sensation of the high molecular water absorbent resin in the use process of the crotch and the flatus of infants and disposable hygienic products. Specifically, the flow guide layer 40 may be a hot air fluffy nonwoven fabric layer, and the hot air nonwoven fabric may be fluffed by a fluffy process.

In a preferred embodiment, the conductive layer 50 is a layer of wood pulp fibers, which have good liquid storage and diffusion properties. The wood pulp fiber layer is not mixed with high molecular resin, so that the phenomena of lump rise and fault occurrence in the use process can be avoided. The width of the wood pulp fiber conducting layer 50 should not exceed the width of the middle absorbing layer 30 of the absorbing inner core 33, if the width of the wood pulp fiber conducting layer 50 exceeds the width of the high polymer water-absorbent resin layer, liquid in the wood pulp fiber can be squeezed out under the action of pressure to cause moisture, and the problem can be avoided if the width of the wood pulp fiber conducting layer 50 is smaller than the width of the high polymer resin layer. Preferably, the gram weight of the wood pulp fiber is 80-120 g/square meter, so that the product has good liquid absorption and storage capacity and is soft and comfortable. In addition, the conductive layer 50 may be disposed in a flat structure or a longitudinal strip arrangement structure, that is, the conductive layer 50 may be a flat structure of wood pulp fibers or a longitudinal strip structure of wood pulp fibers.

In a preferred embodiment, the substrate 60 is a hydrophilic nonwoven fabric, and specifically, a material such as a spunbond nonwoven fabric or a through-air nonwoven fabric can be selected. As for the absorbent core 33, the first base layer 10 and the second base layer 20 are both hydrophilic nonwoven fabrics, and the first absorber 31 and the second absorber 32 are both composed of polymer resin particles.

A method of making an absorbent core comprising:

the manufacturing step of the absorbent core 33 is as follows: fixing a plurality of first absorbers 31 on the first base layer 10 to form a first pre-inner core; securing a plurality of second absorbents 32 to the second base layer 20 to form a second pre-core; the first pre-inner core and the second pre-inner core are compounded into a whole up and down, so that the plurality of first absorbers 31 and the plurality of second absorbers 32 are sequentially staggered and arranged in the transverse direction and the longitudinal direction; wrapping and folding the left end and the right end of the first base layer 10 in the length direction towards the second preliminary inner core to form an absorption inner core 33;

a composite molding step: arranging a conducting layer 50 on a base material 60, placing an absorption inner core 33 on the conducting layer 50, and wrapping and folding the left end and the right end of the base material 60 in the length direction towards the absorption inner core 33 to form a pre-absorption core body; and arranging a flow guide layer 40 on the pre-absorption core body.

As a preferred embodiment, the absorbent core is laminated between the materials mainly by means of hot melt adhesive bonding. Firstly, crushing wood pulp sheets into wood pulp fibers by a crushing device, then passing the wood pulp fibers through a forming drum device, forming a wood pulp fiber layer structure by utilizing negative pressure adsorption, and transferring the wood pulp fiber layer structure to a base material 60 which is sprayed with glue by hot melt glue through a transfer device; then, the pre-absorbent core is formed by wrapping the absorbent core 33. Finally, the pre-absorbent core is bonded to the upper fluid-conducting layer 40 by means of a hot melt adhesive.

The embodiment of the utility model provides an use the absorption core in the health supplies, including infant's panty-shape diapers, pull-up diaper, sanitary towel, menstrual period trousers, adult's panty-shape diapers, incontinence trousers and urine pad.

Example 1

As shown in fig. 5, an absorbent core comprises a fluid conducting layer 40, an absorbent core 33, a conductive layer 50 and a substrate 60. The flow guide layer 40 is a hot air fluffy cloth layer; the absorption inner core 33 comprises a first hydrophilic base layer, a second hydrophilic base layer and an intermediate absorption layer 30 clamped between the first hydrophilic base layer and the second hydrophilic base layer, the second hydrophilic base layer is wrapped at two end parts of the first hydrophilic base layer and forms a closed loop structure with the end parts of the second hydrophilic base layer, the intermediate absorption layer 30 consists of polymer resin strips which are transversely and longitudinally staggered, specifically, the central area is a polymer resin strip which is transversely distributed in a strip shape, the left side and the right side of the central area are polymer resin strips which are transversely distributed in a strip shape, the upper side and the lower side of the central area are polymer resin strips which are longitudinally distributed in a strip shape, and the water absorption speed of the transverse strip-shaped polymer resin strips is greater than the absorption speed of the longitudinal strip-shaped polymer resin strips; the conductive layer 50 is a wood pulp fiber layer; the base material 60 is a hydrophilic fiber layer, and two ends of the base material 60 are bent upwards to wrap the conducting layer 50 and the absorbing inner core 33, and form a closed loop structure with the end of the conducting layer 50 and the end of the absorbing inner core 33. The absorbent core of example 1 was prepared as follows:

crushing and defibrating wood pulp raw materials into wool pulp fibers, and arranging the wool pulp fibers on a base material 60 which is glued by hot melt glue; then respectively carrying out hot melt adhesive gluing on the first hydrophilic base layer and the second hydrophilic base layer, fixing the transverse high-molecular water-absorbing resin on the first hydrophilic base layer, fixing the longitudinal high-molecular water-absorbing resin on the second hydrophilic base layer, and then coating and folding the hydrophilic base layers through a folding mechanism to form an absorption inner core 33; then, arranging the absorption core 33 on the conducting layer 50, and wrapping and folding two ends of the base layer to form a pre-absorption core; and finally, gluing the pre-absorber by a hot melt adhesive gun, and arranging the diversion layer 40 on the pre-absorption core body to form the final absorption core body.

Specific examples of the materials used in example 1 are shown in table 1 below.

Table 1 example 1 material table for absorbent core

Note: the transverse polymer resin and the longitudinal polymer resin come from different manufacturers, and the water absorption speeds of the transverse polymer resin and the longitudinal polymer resin are different.

Comparative example 1

A composite core comprises a six-layer structure from top to bottom: the hot-air fluffy cloth comprises a first layer of dust-free paper, a first layer of high-molecular water-absorbent resin, hot-air fluffy cloth, a second layer of high-molecular water-absorbent resin, a second layer of dust-free paper and a hydrophilic wrapping and fixing layer, wherein the six layers of structures are compounded into a whole through hot melt adhesive. The specific material information table is shown in table 2 below.

Table 2 table of materials for the absorbent core of comparative example 1

Comparative example 2

A traditional core body sequentially comprises a two-layer structure from top to bottom: the hot-air hydrophilic packaging layer comprises a first hot-air hydrophilic packaging layer, a second high-molecular water-absorbent resin layer and a wood pulp fiber mixing layer, and the two-layer structure is compounded into a whole through hot melt adhesive. The specific material information table is shown in table 3 below.

Table 3 table of materials for the absorbent core of comparative example 2

Comparative example 3

As shown in fig. 6, a three-dimensional wrapped core body sequentially comprises four layers from top to bottom: a first hydrophilic high molecular water absorbent resin fixing layer 101, a first high molecular water absorbent resin layer 102, a second high molecular water absorbent resin layer 103 and a second hydrophilic high molecular water absorbent resin fixing layer 104, wherein wrapping folding parts 1041 are formed at two end parts of the second hydrophilic high molecular water absorbent resin fixing layer 104; the four-layer structure is compounded into a whole through hot melt adhesive. The specific material information table is shown in table 4 below.

Table 4 table of materials for the absorbent core of comparative example 3

Effect testing

Rectangular test pieces 400mm long by 100mm wide were cut from the absorbent cores obtained in example 1 and comparative examples 1 to 3, respectively, and the center line was used as the liquid injection point. A hollow cylindrical glass tube having an inner diameter of 60mm (outer diameter of 70mm, height of 100mm) was placed at the injection point, 80ml of 0.9% physiological saline was injected at 0min and 5min, respectively, and the time taken for the liquid in the hollow cylinder to be absorbed by the absorbent core was recorded as the 1 st absorption rate and the 2 nd absorption rate, respectively. And measuring the diffusion distance of the liquid in the core body along the length direction of the core body at the 4 th min and the 11 th min respectively; after 10min, 20g of filter paper (diameter 110mm) was weighed and placed on the injection site, and a 1.2kg (diameter 90mm) weight was placed on the filter paper, and the filter paper was weighed to increase the weight by the amount of rewet after 1min of pressurization. The test results are shown in table 5 below.

Table 6 table of results of performance test of absorbent cores in example 1 and comparative examples 1 to 3

Item	Example 1	Comparative example 1	Comparative example 2	Comparative example 3
					Absorption Rate 1/sec	10.24	12.16	11.14	23.04
2 nd absorption Rate/second	12.37	12.34	31.16	8.15
					Reverse osmosis amount/g	0.21	1.83	4.24	0.24
1 st diffusion length/mm	276	207	172	282
					2 nd diffusion length/mm	307	220	204	323

As can be seen from the table 6, the absorbent core of example 1 exhibited good effects in the indices of absorption rate, reverse osmosis amount and diffusion length, which are superior to those of comparative examples 1, 2 and 3. The absorbent core product of embodiment 1 has reasonable overall structure arrangement, high liquid absorption speed and excellent conduction performance. The specific analysis is as follows:

the absorption core body provided by the embodiment 1 adopts the hot air fluffy non-woven fabric as an upper layer structure, so that a certain stiffness can be kept under the action of applied pressure, and the liquid back-seepage amount is greatly reduced; compared with the traditional composite core, the reverse osmosis amount after 3 times of liquid adding can be reduced by more than 50 percent. The high molecular water-absorbing resin in the absorption inner core 33 is transversely and longitudinally staggered, and can continuously absorb liquid gradually therein. The macromolecule water-absorbing resin with different water absorption rates can still keep a certain absorption capacity in multiple absorption of the macromolecule in the middle area; meanwhile, under the action of pressure, liquid can be diffused longitudinally at the initial liquid infiltration point, and more liquid can be absorbed by the front side and the rear side due to the slow longitudinal polymer absorption speed, so that the middle area is kept dry and comfortable to a certain extent. The wood pulp fiber conducting layer 50 can promote the urine transverse and longitudinal diffusion performance of the absorption core body in the using process, and even diffusion is achieved, the diffusion length of the absorption core body is increased by 10% compared with that of a traditional composite core body after 3 times of liquid adding, and then the utilization rate of the absorption core body is improved. The absorbent core of example 1 absorbs liquid more readily after liquid acquisition during use and subsequent to liquid insult due to the tendency of the wood pulp fibers to absorb swelling, and liquid preferentially reaches the lower layer of wood pulp fibers. Meanwhile, in the absorbent core of embodiment 1, when the liquid passes through the region of the polymeric absorbent resin layer, the liquid preferentially reaches the lower wood pulp fiber layer due to the capillary phenomenon of the lower wood pulp fiber layer, so as to perform diffusion conduction. And after the wood pulp fibers on the lower layer are absorbed, the liquid is soaked and damaged at the same time, the surface potential energy of the polymer is destroyed, the polymer water-absorbent resin begins to absorb the liquid, and finally the utilization rate of the whole absorption core body is improved. Also, the lower wood pulp fiber layer will have a softer hand than a conventional composite core having wet strength paper as the bottom layer. The wood pulp fiber layer is not added with the macromolecular water-absorbent resin, and the fibers are fixed only by the hot melt adhesive. Therefore, the phenomena of fault and lump rise can not occur in the wearing and using process.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (9)

1. An absorption inner core is characterized by comprising a first base layer, a plurality of first absorbers, a second base layer and a plurality of second absorbers, wherein the first absorbers are transverse strip-shaped absorbers, and the second absorbers are longitudinal strip-shaped absorbers; a plurality of first absorbers are fixed on the first base layer to form a first pre-inner core; a plurality of second absorbers are fixed on the second base layer to form a second pre-inner core; the first pre-inner core and the second pre-inner core are compounded into a whole up and down, and the plurality of first absorbers and the plurality of second absorbers are arranged in a staggered mode in the transverse direction and the longitudinal direction.

2. The absorbent core of claim 1, wherein both ends of the first substrate in the length direction are provided with first wrapping folds, and the first wrapping folds are folded downwards to completely cover the bottom surface of the second substrate; or, a bottom portion of the second base layer is covered by the first wrap fold; the first wrap fold and an end of the second base layer form a closed loop end.

3. The absorbent core of claim 1, wherein said first substrate is divided into a left region, a middle region, and a right region along the length of said first substrate; a plurality of first absorbers are arranged on the left area, the middle area and the right area; the first absorbers are arranged in a plurality of rows on the left side area, the adjacent two rows of the first absorbers, the number of the first absorbers in one row is marked as A, the number of the first absorbers in the other row is marked as B, and A is equal to or not equal to B; the first absorbers are arranged in a plurality of columns on the right side area, two adjacent columns of the first absorbers are arranged, the number of the first absorbers in one column is marked as C, the number of the first absorbers in the other column is marked as D, and C is equal to or not equal to D; the first absorbers are arranged in a plurality of rows in the middle area, and the number of the first absorbers in each row is 1;

dividing the second base layer into an upper side area, a central area and a lower side area along the width direction of the second base layer; a plurality of second absorbers are arranged on the upper side area and the lower side area; the second absorbers are arranged in a plurality of rows on the upper side area, the second absorbers in two adjacent rows are arranged, the number of the second absorbers in one row is marked as E, the number of the second absorbers in the other row is marked as F, and E is equal to or not equal to F; and a plurality of second absorbers are arranged on the lower side area in a plurality of rows, the number of the second absorbers in each adjacent row is marked as G, the number of the second absorbers in the other row is marked as H, and G is equal to or not equal to H.

4. The absorbent core according to any of claims 1 to 3, wherein each of the first absorbent and the second absorbent is composed of polymer resin particles.

5. An absorbent core comprising the absorbent core of any of claims 1-3, further comprising a conductive layer, and a substrate; the flow guide layer, the absorption inner core, the conduction layer and the base material are sequentially stacked up and down.

6. The absorbent core of claim 5 wherein said substrate is provided with second wrapper folds at both longitudinal ends, said second wrapper folds being folded upwardly to completely cover the top surface of said absorbent core; alternatively, a top surface portion of the absorbent core is covered by the second wrapper fold; the second wrapper fold forms a closed loop end with an end of the absorbent core.

7. The absorbent core of claim 5 wherein said flow-directing layer is a lofty nonwoven layer or a foam layer; the conducting layer is a wood pulp fiber layer; the base material is hydrophilic non-woven fabric; for the absorption inner core, the first base layer and the second base layer are both hydrophilic non-woven fabrics, and the first absorber and the second absorber are both composed of polymer resin particles.

8. An absorbent core as claimed in claim 5, wherein said conductive layer has a width equal to or less than the width of the absorbent core.

9. An absorbent core as claimed in claim 5, wherein said conductive layers are arranged in a tiled arrangement or said conductive layers are arranged in a longitudinal stripe arrangement.

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