CN212015964U - Quick flow guide body and absorption article - Google Patents

Abstract

The utility model provides a quick baffle, include: the three-dimensional network-shaped structure matrix is formed by winding or bonding a plurality of first fibers, at least one part of the first fibers extends in a first direction through the matrix, the cross section of the first fibers is in a multi-leaf shape and comprises a plurality of branches which radially extend outwards and a plurality of groove parts which are embedded between the branches, the groove part penetrates the first fiber extending direction, on one hand, continuous pores are easily formed in the groove part, on the other hand, since the groove portion penetrates the first direction so that the pores will penetrate the pair of opposite side surfaces of the base, the pores can be more easily contacted with the body fluid, and, in three aspects, because the outstanding of branch portion for in the base member by the extrusion in-process, branch portion will form the supporting effect to ditch groove portion, and ditch groove portion still can keep for continuous pore, and the body fluid still can be quick flows and spreads along the pore that ditch groove portion formed, the utility model discloses still provide the absorption articles for use of this quick baffle simultaneously.

Description

Quick flow guide body and absorption article

Technical Field

The utility model relates to a disposable hygienic articles field, concretely relates to quick baffle and applied this quick baffle's absorption articles for use.

Background

With the improvement of living standard of people and the development of sanitary material technology, disposable absorption articles are widely applied. The disposable absorption articles usually comprise products such as sanitary towels, paper diapers, sanitary pads, breast pads and the like, and usually comprise a liquid-permeable surface layer, a liquid-impermeable bottom layer and a core body which is clamped between the surface layer and the bottom layer, consists of fluff pulp and has the capability of absorbing and storing liquid, and body liquid is absorbed and fixed by the core body after penetrating through the surface layer.

Because body fluids tend to stain the body of the user when they stay on the surface of the absorbent article, it is desirable that the body fluids be absorbed and immobilized by the core as quickly as possible, and for this reason, ADL (Acquisition Distribution Layer) materials have been developed that are spongy, have a fluffy and porous morphology, have good absorption and diffusion properties, and allow the body fluids to be rapidly diffused along the surface of the ADL when reaching the ADL Layer, so that the core can absorb the body fluids over a larger area, thereby increasing the absorption rate.

However, while the conventional ADL is generally developed for urine-like body fluids and is not effective for body fluids having a higher viscosity such as menstrual blood and breast milk, the absorbent article is squeezed by the body after wearing, and when the ADL is squeezed or squeezed, the gaps are compressed, and body fluids having a higher viscosity such as menstrual blood and breast milk are not easily flowed between the gaps, and the diffusion effect is further deteriorated.

Disclosure of Invention

The present invention provides a fast flow guiding body to solve the above technical problems.

A fast flow conductor comprising: the matrix of three-dimensional network column structure that constitutes by a plurality of first fibre winding or bonding, the matrix include first direction, at least some first fibrous extending direction link up the first direction of matrix, first fibrous cross-section is multilobal shape, includes a plurality of branches that are radial outside and a plurality of groove portion of inlaying between the branch portion, groove portion link up first fibrous extending direction.

Furthermore, the base body is in a cuboid shape and comprises a length direction, a width direction and a height direction, the first direction is parallel to the length direction, the first fibers comprise core parts, the branch parts radially extend outwards from the core parts, and the cross sections of the first fibers are in a trefoil shape and comprise three branch parts and three groove parts.

Further, when the distance between the top ends of the branches and the center of the core is a, the distance between the bottom ends of the grooves and the center of the core is b, and the width of the branches is c, a-b is 10 μm or more.

Further, there are: the ratio of (a-b)/c is more than or equal to 1 and less than or equal to 4.

Further, the mass ratio of the first fibers penetrating in the first direction to the first fibers constituting the matrix is 10% or more.

Further, the matrix also comprises second fibers, at least one part of the second fibers are wound or bonded with the first fibers, and the second fibers are round fibers.

Further, the mass ratio of the second fibers to the matrix is 2-30%.

Furthermore, a diversion trench is arranged on the base body, the diversion trench comprises a length direction, and the length direction of the diversion trench extends along the first direction.

The utility model discloses still provide an absorption articles for use simultaneously, absorption articles for use include the surface course of liquidity, the bottom of imperviousness liquid, press from both sides the absorption core of establishing between surface course and bottom and as above-mentioned quick baffle, quick baffle set up between the surface course and absorption core.

Has the advantages that: the embodiment of the utility model provides a quick baffle, include: a matrix of a three-dimensional network structure formed by winding or bonding a plurality of first fibers, wherein the matrix comprises a first direction, the extending direction of at least one part of the first fibers penetrates through the matrix in the first direction, the cross section of the first fibers is in a multi-leaf shape and comprises a plurality of branches which radially extend outwards and a plurality of groove parts which are embedded between the branches, the groove parts penetrate through the extending direction of the first fibers, on one hand, continuous pores are easily formed in the groove parts, and body fluid can easily flow and diffuse along the pores, on the other hand, because the groove parts penetrate through the first direction, the pores penetrate through a pair of opposite side surfaces of the matrix, so that the pores can more easily contact with the body fluid, the body fluid can flow and diffuse along the pores 12, on the other hand, because of the protrusions of the branches, the branches can form a supporting effect on the groove parts even in the process that the matrix is extruded, so that the groove part can still maintain continuous pores, and body fluid can still rapidly flow and diffuse along the pores formed by the groove part.

Drawings

Fig. 1 illustrates a schematic view of a fast flow guide provided in an embodiment of the present invention.

Fig. 2 first schematic fiber view.

Fig. 3 is a schematic diagram of a three-dimensional network-like structure formed by winding a first fiber.

Fig. 4-5 are schematic diagrams of different configurations of first filament winding.

FIG. 6 is a schematic view of the winding of a first fiber with a second fiber.

Fig. 7 is a schematic view of an absorbent article according to an embodiment of the present invention.

Description of the graphical notation:

a base body 10;

a diversion trench 101;

first fibers 11, 21;

a core 110;

a branch portion 111;

a groove portion 112;

the apertures 12, 22;

a second fiber 23;

a face layer 20;

an absorbent core 30;

a superabsorbent material 31;

a bottom layer 40.

Detailed Description

The embodiment of the utility model provides a quick baffle is arranged in absorbing the articles for use usually to improve absorption articles for use absorption, diffusion rate to the body fluid, quick baffle include base member 10.

Referring to fig. 1, the substrate 10 is substantially in a block shape and includes a first direction, in one embodiment, the substrate 10 is in a rectangular parallelepiped shape and includes a longitudinal direction, a width direction and a height direction, and as shown in fig. 1, the longitudinal direction of the substrate 10 is a left-right direction, the width direction is a front-back direction, and the height direction is an up-down direction. In other embodiments, the substrate 10 may be in other block shapes, such as a cylinder, the cylindrical substrate 10 includes an axial direction and a height direction along the end surface, and the first direction may be the axial direction or the height direction.

The matrix 10 is formed by winding or bonding a plurality of first fibers 11 to form a coherent three-dimensional network structure, a plurality of pores 12 are distributed among the three-dimensional network structure, body fluid is absorbed and diffused through the pores 12, and at least a part of the first fibers 11 extend in a first direction through the matrix 10, so that at least one continuous pore 12 structure is formed in the first direction.

The wrapping may be formed by needle punching, hydroentangling, and the like, and the bonding may include, but is not limited to, chemical bonding and thermal bonding, such as hot rolling or bonding by a hot air stream.

Referring to fig. 2-5, the cross section of the first fiber 11 is multi-lobal, and includes a core 110, a plurality of branches 111 extending radially outward from the core 110, and a plurality of grooves 112 embedded between the branches 111, wherein the grooves 112 penetrate the extending direction of the first fiber 11, in the embodiment, the cross section of the first fiber 11 is tri-lobal, and has three branches 111 extending outward and three grooves 112 embedded between the branches 111. Of course, in other embodiments, the first fiber 11 may have a four-leaf shape, a five-leaf shape, a six-leaf shape or other number of leaf shapes, and when the first fiber 11 has a four-leaf shape, it has four branches 111 and four grooves 112.

The first fibers 11 are made of a thermoplastic polymer, which may be a polyolefin, a polyester, an ethylene copolymer, a propylene copolymer, a butylene copolymer, and combinations thereof, but may also include natural fibers (such as wood, cotton, or rayon) in combination with thermoplastic fibers.

Suitable polyolefins can be used in the present invention and may specifically include polyethylene, polypropylene, copolymers of ethylene with butene, hexene or octene, copolymers of polypropylene and ethylene. The polyolefin may comprise a homopolymer or a copolymer (e.g., a propylene-alpha-olefin copolymer). Preferably, the first fibers 11 are a polyolefin material comprising a propylene-alpha-olefin copolymer and a propylene homopolymer.

Further, the first fibers 11 are formed of polyethylene homopolymer or polypropylene homopolymer, copolymer thereof, mixture of polyethylene and polypropylene, polyester copolymer and/or polyester mixture.

Specifically, a homopolymer or a copolymer of a propylene group or a vinyl group is used. In the case of propylene-based polymers, the polymers may include comonomer derived units selected from ethylene and C4-C10 alpha-olefins. In the case of vinyl polymers, the polymer may include comonomer derived units selected from C3 to C10 alpha olefins. Suitable examples of polyolefin materials include propylene homopolymers, ethylene homopolymers, propylene copolymers and ethylene copolymers, such as Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE) and Low Density Polyethylene (LDPE).

Suitably, the polyester can be an aliphatic polyester (such as polylactic acid) or an aromatic polyester (such as polyethylene terephthalate (PET) and polytrimethylene terephthalate (PTT)).

Further, the first fibers 11 may also include additives including heat stabilizers, light stabilizers, slip agents, waxes, and additives to make the fabric hydrophilic or hydrophobic,

further, the first fibers 11 used in this embodiment may be monocomponent fibers or multicomponent fibers (e.g., bicomponent fibers). When the first fibers 11 are bicomponent fibers, the limbs 111 will be made of one type of polymer and the core 110 to which the limbs 111 are connected will be made of another type of polymer. Most preferred are core-sheath bicomponent fibers comprising polyethylene and polypropylene, but any other combination of other suitable polymers is possible, such as a combination of polyester and polyolefin. The bicomponent fibers may comprise different types of polypropylene. More preferably, the bicomponent fiber has a core of polypropylene with a higher melting point and lobes of polypropylene with a lower melting point. In another embodiment, the bicomponent fiber comprises two polypropylenes that differ in melt temperature or melt flow.

The first fibers 11 can be made according to spinning techniques well known in the art. Most conveniently, a spunbond process is used by which the nonwoven fabric can be formed directly.

Specifically, spunbond fibers are typically produced by extruding a molten polymer through a relatively large spinneret (having thousands of holes per linear meter) or by extruding a molten polymer from a cylinder of a relatively small spinneret (e.g., containing as few as 40 holes). After exiting the spinneret, the molten fibers were quenched by a cross-flow air quench system, then pulled away from the spinneret and attenuated by high velocity air. The laying down of the filaments to form the non-woven layer occurs on a permeable conveyor belt. Spunbond fibers are generally continuous and have fiber diameters between about 10 and 100 microns.

Further, in order to improve the ability of the substrate 10 to absorb and diffuse body fluids, the substrate 10 may also be locally treated to make the substrate 10 hydrophilic or hydrophobic, such as by treating the surface of the substrate 10 with a hydrophilic surfactant or treating the substrate 10 with a fluorocarbon or silicon material.

It is understood that the first fibers 11 are generally drawn into a long strip shape, including an extending direction which is a length direction of the long strip, when a plurality of first fibers 11 are wound or bonded to form the matrix 10, since the branches 111 protrude relatively, the grooves 112 are recessed relative to the branches 111, so that the pores 12 are formed in the grooves 112, further, when a part of the fibers penetrate through the first direction, the grooves 112 on the part of the first fibers 11 penetrate through the first direction, so that on one hand, continuous pores 12 are easily formed in the grooves 112, and the body fluid can easily flow and diffuse along the pores 12, on the other hand, since the grooves 112 penetrate through the first direction, so that the pores 12 penetrate through a pair of opposite sides of the matrix 10, such as the upper side and the lower side, the left side and the right side, the front side and the back side, and the like, so that the pores 12 can more easily contact the body fluid, or the absorbent core is communicated, so that the body fluid flows and diffuses along the pores 12 and is guided into the absorbent core, and on the other hand, due to the protrusion of the branches 111, even in the process that the matrix 10 is squeezed, the branches 111 will have a supporting effect on the groove 112, so that the groove 112 can still be maintained as a continuous pore 12, that is, even if squeezed, the body fluid can still rapidly flow and diffuse along the pores 12 formed by the groove 112.

In addition, it is known that a capillary phenomenon is a main factor that a porous material such as paper and an absorbent article can absorb water. The capillary phenomenon is a phenomenon in which a liquid rises along a thin tube against the gravitational force due to the difference between the surface tension and the adhesion force of the liquid in the thin tube. The capillary phenomenon follows the following formula:

。

in the above formula, h represents the height of the liquid rise, γ represents the surface tension, θ represents the contact angle, ρ represents the liquid density, g represents the gravitational acceleration, and r represents the tubule radius, and in the same environment, the surface tension γ, the contact angle θ, the liquid density ρ, and the gravitational acceleration g in the above formula can be regarded as constants, that is, the height of the liquid rise depends on the radius of the tubule, and the smaller the tubule radius, the higher the liquid rise.

When the principle of the capillary phenomenon is applied to an absorbent article, the radius r of the tubule is the size of the pores 12 of the absorbent article, and the smaller the pores 12 are, the more easily the capillary phenomenon occurs, that is, when the matrix 10 is squeezed, the smaller the pores 12 can be, and the absorption and diffusion rates can be further increased.

Further, in order to enable the substrate 10 to have better absorption and diffusion effects, the substrate 10 is further provided with a diversion trench 101, that is, a groove is pressed on the substrate 10 by an external force, so that the substrate 10 corresponding to the region of the groove is compressed, the pores 12 in the region are reduced, and the capillary action in the region is increased.

Further, the base 10 includes a length direction, the first direction is parallel to the length direction of the base 10, the guiding groove 101 includes a length direction, and the length direction of the guiding groove 101 extends along the first direction. This makes the extending direction of the aperture 12 formed by the groove portion 112 substantially parallel to the extending direction of the guide groove 101, on the one hand, the branch portion 111 is not easily collapsed, and the aperture 12 is blocked, on the other hand, the body fluid can easily contact the guide groove 101 area, and the body fluid is diffused along the length direction of the guide groove 101.

Furthermore, the flow guide grooves 101 include an even number of flow guide grooves, and half of the flow guide grooves 101 and the other half of the flow guide grooves 101 are symmetrically arranged along the width direction of the substrate 10.

Furthermore, the number of the guide grooves 101 is two, the two guide grooves 101 are arc-shaped, and the distance between the two guide grooves 101 gradually increases from the middle of the substrate 10 to the edge of the substrate 10.

Further, since the plurality of first fibers 11 are entangled or bonded to form pores 12 in the groove portion 112, and the shallower the depth of the groove portion 112, the other first fibers 11 are likely to form a plug in the groove portion 112 and affect the flow and diffusion of the body fluid, when the distance between the top end of the branch portion 111 and the center of the core portion 110 is a and the distance between the bottom end of the groove portion 112 and the center of the core portion 110 is b, a-b is not less than 10 μm, and more preferably a-b is not less than 20 μm.

Further, when the branch parts 111 are made thinner, the more easily the bending and collapsing action occurs when being pressed, and the voids 12 formed in the groove parts 112 are blocked by the collapsed branch parts 111, and therefore, if the width of the branch parts 111 is c at the same time, a/c is not more than 5, and the width of the branch parts 111 means the average distance between the two opposite sides (outer sides) of the single branch part 111.

Further, in order to make the groove portion 112 easily form the pores 12 and prevent the branch portion 111 from easily collapsing by the pressing action, there are: 1. ltoreq. a-b)/c. ltoreq.4, more preferably 1.5. ltoreq. a-b)/c. ltoreq.3.

Further, in order to provide the matrix 10 with better absorption and diffusion effects, the mass ratio of the first fibers 11 penetrating the first direction to the first fibers 11 constituting the matrix 10 is 10% or more, more preferably 12% or more, and when the first direction is the length direction of the matrix 10, a second portion of the first fibers 11 penetrating the width direction of the matrix 10 and/or a third portion of the first fibers 11 penetrating the thickness direction of the matrix 10 are provided, wherein the second portion of the first fibers 11 accounts for 5% or more of the matrix 10, and the third portion of the first fibers 11 accounts for 5% or more of the matrix 10. However, the mass ratio of the second part of the first fibers 11 and the third part of the fibers in the matrix 10 should be less than or equal to 30% to avoid rapid absorption and diffusion of body fluid.

In addition, referring to fig. 6, the matrix further includes second fibers 23, at least a portion of the second fibers 23 are entangled or bonded with the first fibers 21, the second fibers 23 are round fibers, and since the round fibers can better fit with the groove portion, relatively smaller pores 22 are formed in the groove portion, and according to the above-mentioned capillary action mechanism, the relatively smaller pores 12 have a better capillary action, so as to increase the absorption and diffusion rate of the matrix as a whole. The mass ratio of the second fibers 23 to the matrix is preferably 2% to 30% in order to reduce the second fibers 23 from being embedded in the grooves and causing clogging of the grooves while increasing the absorption and diffusion rates. More preferably, the mass ratio of the second fibers 23 to the matrix is 5% to 15%.

Further, the second fibers 23 may be spunbond fibers, or other fibers, such as wood pulp fibers, or a mixture of wood pulp fibers and spunbond fibers.

Preferably, the substrate 10 has a basis weight of at least 8 gsm (g/m 2) and less than 80 gsm, preferably the basis weight of the substrate 10 is in the range of 12-55 gsm, more preferably in the range of 15-45 gsm.

Further, the rapid flow conductor may further include a composite layer disposed above or below the substrate 10, the composite layer may be an additional fiber layer, the composite layer may be the same as or different from the substrate 10, and the composite layer may include one or more spunbond layers (S) and one or more meltblown layers (M), such as SMS, SMMS, SSMMS, etc., which are adhered. In some embodiments, the composite layer may be fabricated separately from or simultaneously with the substrate 10, and the absorption and diffusion rates of the fast flow conductors are further enhanced by the provision of the composite layer.

Referring to fig. 7, further, the present invention further provides an absorbing article, which uses the fast flow guiding body provided by the embodiment of the present invention. Suitably, the absorbent article according to the invention is a disposable sanitary absorbent article which may be a diaper, a sanitary napkin, a panty liner or a breast pad or the like.

The absorption article comprises a liquid-permeable surface layer, a liquid-impermeable bottom layer 40 and an absorption core body 30 clamped between the surface layer and the bottom layer 40, wherein the rapid flow guide body is arranged between the surface layer and the absorption core body 30.

In some embodiments, it may be desirable to use the absorbent core 30 also as a fast flow conductor, if extremely fast absorption is desired, i.e., a fast flow conductor is also used as the absorbent core 30 in such applications.

Further, the absorbent article may be further provided with other accessories, such as a super absorbent material 31 disposed in the absorbent core 30, a flap for fixing the absorbent article, a hook and loop fastener, a back adhesive, etc.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (9)

1. The utility model provides a quick baffle, its characterized in that, quick baffle include the base member of the three-dimensional network column structure who constitutes by a plurality of first fibre windings or bonding, the base member include first direction, the first direction of base member is link up to the extending direction of at least partly first fibre, first fibrous cross-section is multileaf shape, includes a plurality of branches that are radial outside stretching out and a plurality of groove portion of establishing between branches, groove portion link up first fibre extending direction.

2. The flow leader according to claim 1, wherein the substrate has a rectangular parallelepiped shape including a longitudinal direction, a width direction and a height direction, the first direction being parallel to the longitudinal direction, the first fibers comprise a core, the branches radially extend outward from the core, and the first fibers have a trilobal cross-section comprising three branches and three grooves.

3. Fast flow conductor according to claim 2, wherein if the distance between the top of the branches and the center of the core is a, the distance between the bottom of the grooves and the center of the core is b, and the width of the branches is c, then a-b ≧ 10 μm.

4. The fast flow conductor of claim 3, wherein there are: the ratio of (a-b)/c is more than or equal to 1 and less than or equal to 4.

5. The rapid flow conductor of claim 4, wherein a mass ratio of the first fibers extending through the first direction to the first fibers forming the matrix is 10% or greater.

6. The fast flow conductor of claim 2 wherein the matrix further comprises second fibers, at least a portion of the second fibers being entangled with or bonded to the first fibers, the second fibers being round fibers.

7. The rapid flow conductor of claim 6, wherein the second fiber to matrix mass ratio is between 2% and 30%.

8. The fast flow conductor of any one of claims 2-7 wherein the substrate has channels formed therein, the channels including a length direction, the channel length direction extending in a first direction.

9. An absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, an absorbent core sandwiched between the topsheet and the backsheet, and the rapid flow conductor of any of claims 1-8 disposed between the topsheet and the absorbent core.

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