Detailed description of the invention
Shown in Fig. 1 and Fig. 2, the absorbent article 10 that first preferred embodiment of the present invention provides, it comprises the liquid permeable top sheet 11 stacked gradually from top to bottom along absorbent article 10 thickness direction, absorptive core 12 and opaque liquid egative film 13, described absorptive core 12 has two surfaces, a upper surface in the face of liquid permeable top sheet 11, a lower surface in the face of opaque liquid egative film 13, described absorptive core 12 is provided with the through hole 14 that multiple longitudinal direction runs through absorptive core 12, described through hole 14 has the upper end being positioned at this absorptive core 12 upper surface and the lower end being positioned at this absorptive core 12 lower surface, the aperture, upper end of described through hole 14 is less than aperture, lower end.
Described liquid permeable top sheet 11 selects transparent liquid material of good performance, and preferably punch film material, and described punching film material refers to a kind ofly have material porose on the film of Mono direct percolation effect, as punching PE material, perforated non-woven fabric.
Described absorptive core 12 is for absorbing the liquid permeated from described liquid permeable top sheet 11, and it is folded between liquid permeable top sheet 11 and opaque liquid egative film 13.In the present invention, the material forming described absorptive core 12 does not have special restriction, as long as to can be used in absorbent article 10 and can form the material with absorption function all may be used in the present invention.
Described opaque liquid egative film 13 is for stopping that the liquid in described absorptive core 12 oozes out, as long as the material forming described opaque liquid egative film 13 can stop that the liquid of absorptive core 12 continues the material of infiltration downwards.
In the present embodiment, described absorptive core 12 is provided with the through hole 14 that multiple longitudinal direction runs through absorptive core 12, described through hole 14 has the upper end being positioned at this absorptive core 12 upper surface and the lower end being positioned at this absorptive core 12 lower surface.When absorbent article 10 is at absorption thick liquid, during as menses, thick liquid infiltrates on absorptive core 12 after through liquid permeable top sheet 11, the through hole 14 of absorptive core 12 is run through owing to absorptive core 12 being provided with multiple longitudinal direction, the absorbent article of through hole is not set in prior art, then can not naturally be flowed in described through hole 14 by the thick liquid that absorptive core 12 surface sponges completely.Described absorptive core 12 is stacked settings with opaque liquid egative film 13, be positioned at the lower end in contact opaque liquid egative film 13 of the through hole 14 of absorptive core 12 lower surface, the space of formation one upper end open lower end closed like this, that is, the through hole 14 that the longitudinal direction that described absorptive core 12 is arranged runs through absorptive core 12 provides a liquid-retaining volume to the thick liquid be not completely absorbed, described liquid-retaining volume relatively increases the contact area of thick liquid and absorptive core 12, make the viscous solution physical ability absorbing material touching absorptive core 12 more, so can accelerate the absorption of absorptive core 12 pairs of thick liquids.
In the present embodiment, described through hole 14 is designed to the structure that aperture, upper end is less than aperture, lower end, and the aperture, upper end of described through hole 14 is in the scope of 0.1mm to 2mm, and aperture, lower end is in the scope of 0.2mm to 3mm.The through hole 14 of design like this has following two advantages:
The first, reduce bleeding back of thick liquid.When thick liquid accumulates in the through hole 14 of so design, because the aperture, upper end of described through hole 14 is less than lower end aperture, even if when absorbent article 10 is squeezed, also be not easy to make to accumulate in through hole 14 thick liquid that do not absorb or do not absorb completely and bleed back surface to absorbent article 10 in a large number by the aperture that upper end is less, so reduce bleeding back of thick liquid.
The second, accelerate the absorption of absorbent article 10 pairs of thick liquids further.Because the thick liquid accumulated in through hole 14 not easily bleeds back, also the holdup time of thick liquid in described through hole 14 is relatively increased while minimizing thick liquid bleeds back, make it to be absorbed by absorptive core 12 more fully, accelerate the absorption of absorbent article 10 pairs of thick liquids so further.
Known, the central region of absorbent article 10 be liquid mainly flow to region, in order to allow absorbent article 10 absorbing fluid faster, described through hole 14 is in the intensive setting of absorptive core 12 central region in the present embodiment, arranging away from central region is loose, and described through hole 14 is " work " shape in the intensive setting of described absorptive core 12 central region.
Refer to shown in Fig. 3, in the present embodiment, described through hole 14 is formed by the mode of acupuncture or mold compresses absorptive core 12, preferably, forms described through hole 14 by pricker acupuncture on absorptive core 12.When adopting acupuncture mode, described pricker can extrude the absorbing material on absorptive core 12, so, absorbing material near through hole 14 is fine and close compared to the absorbing material away from through hole 14, that is, absorbing material near through hole 14 can form compact area 15, and the absorbing material away from through hole 14 forms non-densified regions 16, and the fiber capillary caliber of described compact area 15 is little compared to the fiber capillary caliber of non-densified regions 16.When thick liquid enters in through hole 14, thick liquid is energy rapid diffusion in the compact area 15 near through hole 14, is then diffused into non-densified regions 16 at leisure, so, accelerates the absorption of absorbent article 10 pairs of thick liquids further.
Refer to shown in Fig. 4, the absorbent article 20 that second preferred embodiment of the present invention provides, it comprises the liquid permeable top sheet 21 stacked gradually from top to bottom along absorbent article 20 thickness direction, absorptive core 22 and opaque liquid egative film 23, described absorptive core 22 comprises two straton absorbed layers of stacked setting, described two straton absorbed layers comprise the upper straton absorbed layer 221 and lower straton absorbed layer 222 that stack gradually from top to bottom along absorptive core 22 thickness direction, every straton absorbed layer all has two surfaces, a upper surface in the face of liquid permeable top sheet 11, a lower surface in the face of opaque liquid egative film 13, described upper straton absorbed layer 221 is provided with the upper strata through hole 241 that multiple longitudinal direction runs through straton absorbed layer 221, described lower straton absorbed layer 222 is provided with lower floor's through hole 242 that multiple longitudinal direction runs through lower straton absorbed layer 222, described upper strata through hole 241 has the upper end being positioned at straton absorbed layer 221 upper surface and the lower end being positioned at straton absorbed layer 221 lower surface, described lower floor through hole 242 has the upper end being positioned at lower straton absorbed layer 222 upper surface and the lower end being positioned at lower straton absorbed layer 222 lower surface, wherein, the aperture, upper end of described upper strata through hole 241 is less than aperture, lower end, the aperture, upper end of described lower floor through hole 242 is greater than aperture, lower end, and upper strata through hole 241 and lower floor's through hole 242 are oppositely arranged one by one.
In the present embodiment, the aperture, upper end of described upper strata through hole 241 is in the scope of 0.1mm to 2mm, and aperture, lower end is in the scope of 0.2mm to 3mm.Described upper strata through hole 241, in the intensive setting of upper straton absorbed layer 221 central region, is being arranged away from central region is loose, and described upper strata through hole 241 on described the intensive setting of straton absorbed layer 221 central region in " work " shape.
The aperture, upper end of described lower floor through hole 242 is in the scope of 0.2mm to 3mm, and aperture, lower end is in the scope of 0.1mm to 2mm.Described lower floor through hole 242, in the intensive setting of lower straton absorbed layer 222 central region, arranging, and described lower floor through hole 242 is " work " shape in the intensive setting of described lower straton absorbed layer 222 central region away from central region is loose.
In the present embodiment, described upper strata through hole 241 and lower floor's through hole 242 are oppositely arranged one by one, that is, the lower end of described upper strata through hole 241 and the upper end one_to_one corresponding of lower floor's through hole 242 and be interconnected, both common structures forming the similar drum closed up in two ends broad in the middle, when thick liquid enters into this drum organization, thick liquid is more difficult bleeds back phenomenon, improves absorptive core 22 so further and absorbs and hold the ability of thick liquid.
Bleed back in order to the ability further improving the absorption thick liquid of absorptive core 22 also reduces, the quantity of described lower floor through hole 242 is more than or equal to 1:1 with the ratio of the quantity of upper strata through hole 241.
In the present embodiment, upper strata through hole 241 and lower floor's through hole 242 also can being formed by the mode of acupuncture or mold compresses as the first preferred embodiment.
Understandable, the lower straton absorbed layer 222 in two straton absorbed layers of described absorptive core 22 being also provided with the lower floor's through hole 242 longitudinally running through lower straton absorbed layer 222, is to allow viscous solution physical ability fully be sponged by absorbent article 20 quickly.Position relationship between described upper strata through hole 241 and lower floor's through hole 242 does not affect the ability that absorbent article 20 absorbs thick liquid fast, position relationship is between the two not limited to the position relationship be oppositely arranged one by one in the present invention second preferred embodiment, in other embodiments, according to product needed, both can be set to other position relationship, the position relationship be such as crisscross arranged, one by one position relationship that is relative and that be crisscross arranged exist jointly.
When thick liquid arrives lower straton absorbed layer 222 place through upper straton absorbed layer 221, if to accumulate in lower floor's through hole 242 not by the thick liquid that sponges in time when being squeezed, reverse osmosis phenomenon may be there is in thick liquid, owing to being also folded with straton absorbed layer 221 on one deck between lower straton absorbed layer 222 and liquid permeable top sheet 21, lower straton absorbed layer 222 is away from liquid permeable top sheet 21, even if occur reverse osmosis also can not directly reverse osmosis to the surface of liquid permeable top sheet 21, but reverse osmosis is in upper strata through hole 241, as long as upper strata through hole 241 is set to the shape that aperture, upper end is less than aperture, lower end, reverse osmosis to the thick liquid in upper strata through hole 241 when being squeezed hardly again reverse osmosis to the surface of liquid permeable top sheet 21.
Understandable, the shape of the lower floor's through hole 242 on described lower straton absorbed layer 222 is not limited to the shape of the present invention second preferred embodiment, in other embodiments, can design different rules or irregular shape as required, such as aperture, upper end is greater than the shape etc. in aperture, lower end.
In sum, when the absorptive core of described absorbent article is the structure of two straton absorbed layers, be not limited to the structure in the second preferred embodiment in the present invention, also can be designed to other various different structure.Refer to Fig. 5, the absorbent article 30 of the present invention the 3rd preferred embodiment, its lower floor's through hole is designed to aperture, upper end and is less than aperture, lower end, and upper strata through hole and lower floor's through hole are crisscross arranged.Refer to Fig. 6, the absorbent article 40 of the present invention the 4th preferred embodiment, the aperture, upper end of its lower floor's through hole equals aperture, lower end, and the position relationship of upper strata through hole and lower floor's through hole is for being oppositely arranged one by one and being crisscross arranged two kinds.
Understandable, the absorptive core of absorbent article of the present invention can also be set to the sub-absorbed layer of more than three layers or three layers stacked settings, every straton absorbed layer all has two surfaces, a upper surface in the face of liquid permeable top sheet, a lower surface in the face of opaque liquid egative film, the sub-absorbed layer of described more than three layers or three layers has a through hole absorbed layer being provided with and longitudinally running through this sub-absorbed layer at least, described through hole has the upper end being positioned at this sub-absorbed layer upper surface and the lower end being positioned at this sub-absorbed layer lower surface, wherein at least one straton absorbed layer being provided with through hole, aperture, upper end near the through hole on the sub-absorbed layer of liquid permeable top sheet is less than aperture, lower end.
Understandable, absorbent article of the present invention is arranged on the basis of through hole on absorptive core, and some conventional modes also can be adopted to improve absorption rate further, as arranged the guide layer of ADL material between liquid permeable top sheet and absorptive core; In absorptive core, High hydrophilous resin etc. is set.
Compared with prior art, absorbent article of the present invention, by the absorptive core in absorbent article being provided with the through hole that multiple longitudinal direction runs through absorptive core, a liquid-retaining volume is provided to thick liquid, and relatively increase the contact area of thick liquid and absorbent article, make thick liquid can touch absorbing material in absorptive core more, thus sponged fast by absorbing material; In addition, through hole is set to the structure that aperture, upper end is less than aperture, lower end, the thick liquid accumulating in so design through hole cannot easily penetrate the less bore in upper end and bleeds back to absorbent article surface in a large number, while minimizing allow liquids, also relatively increase the holdup time of liquid at through hole, liquid can further be absorbed by absorptive core fully.
In addition, those skilled in the art can also do other change in spirit of the present invention.Therefore these changes done according to the present invention's spirit, all should be included within the present invention's scope required for protection.