Absorbent sheet and disposable wearing article including the same
阅读说明:本技术 吸收片和包含吸收片的一次性穿着物品 (Absorbent sheet and disposable wearing article including the same ) 是由 巢山润之介 于 2018-08-24 设计创作,主要内容包括:[课题]本发明提供一种吸收片,该吸收片能够提高在所应用的穿着物品的所期望的区域、例如一次性尿片的裆部的吸收能力。[解决手段]在位于第1片(1)与第2片(2)之间、周围被划定的第1空间区域(10)的内部设有吸收聚合物,在上述第1空间区域(10)形成有通过第1片(1)与第2片(2)的接合所产生的阻挡部(4),上述阻挡部(4)提高了吸收聚合物在上述第1空间区域(10)内的重力移动的阻力。([ problem ] to provide an absorbent sheet that can improve the absorption capacity in a desired region of a wearing article to which the absorbent sheet is applied, for example, the crotch portion of a disposable diaper. [ solution ] an absorbent polymer is provided in a 1 st space region (10) located between and defined around a 1 st sheet (1) and a 2 nd sheet (2), a barrier section (4) generated by joining the 1 st sheet (1) and the 2 nd sheet (2) is formed in the 1 st space region (10), and the barrier section (4) increases the resistance to gravitational movement of the absorbent polymer in the 1 st space region (10).)
1. An absorbent sheet characterized in that an absorbent polymer is provided inside a 1 st space region defined between and around a 1 st sheet and a 2 nd sheet,
a barrier created by the joining of the 1 st and 2 nd sheets is formed in the 1 st space region, the barrier increasing the resistance to gravitational movement of the absorbent polymer in the 1 st space region.
2. An absorbent sheet according to claim 1, wherein the blocking portion is linear or dotted at an angle intersecting the 1 st direction in plan view.
3. The absorbent sheet according to claim 1, wherein two or more barrier portions in a linear or dotted line shape intersecting the 1 st direction in a plan view are provided at intervals in the 1 st direction to form a barrier portion row,
in the 1 st space region, barrier rows are formed to be separated in a 2 nd direction intersecting the 1 st direction.
4. The absorbent sheet according to claim 3, wherein one end of the barrier of one barrier row and the opposite other end of the barrier of the other barrier row are arranged alternately in the 1 st direction, and a spacer through which the absorbent polymer can pass is provided between the end of the barrier of the one barrier row and the other end portion of the barrier of the other barrier row.
5. An absorbent sheet according to claim 3, wherein a spacer through which an absorbent polymer can pass is provided between the barrier in the barrier row and the delimiting part of the 1 st space region.
6. Absorbent sheet according to claim 3, wherein the blocking parts in the row of blocking parts have hooks at their ends.
7. The absorbent sheet according to claim 1, wherein two or more of the 1 st space regions are formed at intervals in the 2 nd direction intersecting the 1 st direction in which the absorbent polymer moves by gravity in the 1 st space region.
8. The absorbent sheet according to claim 7, wherein a 2 nd space region defined therearound is formed at the 2 nd-direction spacing portion of the 1 st space region group, two or more 2 nd space regions are defined in the 1 st direction, and an absorbent polymer is provided in each of the defined regions.
9. The absorbent sheet according to claim 1, wherein a surrounding member for definition is provided between the 1 st sheet and the 2 nd sheet, and the member for definition is defined as a 1 st space region of the absorbent polymer in the member for definition, and the 1 st sheet and the 2 nd sheet are bonded to each other with the member for definition interposed therebetween.
10. A disposable wearing article characterized in that the absorbent sheet according to claim 1 is disposed between a liquid-permeable sheet and a liquid-impermeable sheet.
11. The disposable wearing article according to claim 10, wherein said barrier portion is linear or dotted at an angle intersecting with the front-rear direction of the wearing article in a plan view.
Technical Field
The present invention relates to an absorbent sheet comprising an absorbent polymer and a sheet, and to disposable wearing articles such as various disposable diapers comprising the absorbent sheet.
Background
Superabsorbent polymers, i.e., polymers commonly referred to as SAP, are used in various types of disposable diapers such as panties, loop fasteners, pads, and the like, sanitary napkins, light incontinence sheets, and the like.
The SAP is combined with the sheet in addition to being dispersed in the pulp layer or disposed on the surface.
That is, the absorbent sheet has an upper surface sheet, a lower surface sheet, and an absorbent polymer positioned therebetween, and has a plurality of pockets whose peripheries are surrounded by joined portions and which have a shape having a major axis direction and a minor axis direction in a plan view, and the absorbent polymer is movably arranged in the major axis direction of the pockets.
However, the structure of
Disclosure of Invention
Problems to be solved by the invention
Therefore, a main object of the present invention is to improve the absorption capacity by suppressing the excessive concentration (bias) of the absorption capacity of the entire target region when applied to a product.
Means for solving the problems
The absorbent sheet of the present invention for solving the above problems comprises an absorbent polymer disposed in a 1 st space region defined between and around a 1 st sheet and a 2 nd sheet,
a barrier portion is formed in the 1 st space region by joining the 1 st sheet and the 2 nd sheet, and the barrier portion increases resistance to gravitational movement of the absorbent polymer in the 1 st space region.
Since the stopper portion formed by joining the 1 st sheet and the 2 nd sheet in the 1 st space region increases the resistance to the gravitational movement of the absorbent polymer in the 1 st space region, when the absorbent sheet is applied to a wearing article, even if the absorbent polymer moves by the gravitational force due to the posture of the wearer, the resistance to the gravitational movement of the polymer can be increased by the stopper portion, and therefore, the polymer can be prevented from being concentrated on the side on the lower side of the gravitational movement, and the body fluid can be absorbed in a state where the polymer is dispersed as the entire 1 st space region, and thus, the absorption capacity can be prevented from being lowered.
For example, when the front-back direction of the disposable diaper is applied as the direction of gravitational movement of the absorbent polymer, the polymer tends to concentrate in the crotch portion due to gravitational movement in a standing posture, but since the stopper portion increases the resistance to gravitational movement of the polymer, the entire absorbent sheet can absorb body fluid, and a desired absorption capacity can be exhibited.
The barrier portions may be linear or dotted lines that cross the 1 st direction in a plan view, and two or more barrier portions may be provided at intervals in the 1 st direction to form a barrier portion row.
By providing more than two blocking portions, the blocking effect is increased.
The barrier column may also form a plurality of columns. That is, barrier rows that are divided into pairs in the 2 nd direction intersecting the 1 st direction may be formed in the 1 st space region.
In this aspect, the one end of the barrier of the one barrier row and the opposite other end of the barrier of the other barrier row are alternately arranged in the 1 st direction, and a spacer through which the absorbent polymer can pass may be formed between the end of the barrier of the one barrier row and the other end of the barrier of the other barrier row.
As a result, the absorbent polymer moves downward along the barrier section of one barrier section row, then transfers to the barrier section of the other barrier section row, and moves downward along the barrier section of the other barrier section row. This is repeated, moving in the direction of the action of gravity.
By changing the direction of movement in this manner alternately, the blocking effect by the blocking portion is increased, and the effect of preventing the polymer from being concentrated is improved.
Between the above-mentioned barrier in the barrier row and the delimiting part of the 1 st space region, a spacer through which the absorbent polymer can pass may be formed.
The side of the 1 st space region in the barrier on the demarcated portion side is likely to become a dead zone in the movement of the absorbent polymer.
However, if the spacer through which the absorbent polymer can pass is formed between the barrier and the 1 st space region, the absorbent polymer can be moved while suppressing the generation of dead space.
If a hook is formed at the end of the stopper, the hook can suppress the movement of the absorbent polymer.
When two or more 1 st space regions are formed at an interval in the 2 nd direction intersecting the 1 st direction in which the absorbent polymer moves by gravity in the 1 st space region, the barrier property of the entire absorbent sheet is improved.
That is, by forming many small spaces and forming the barriers in these small spaces, barrier properties as the whole absorbent sheet are improved, as compared with the case where the barriers are provided in the large spaces.
The present invention includes, in addition to the case of directly joining the 1 st sheet and the 2 nd sheet, the following cases and the like: a surrounding member for delimiting is provided between the 1 st sheet and the 2 nd sheet, and the 1 st sheet and the 2 nd sheet are joined with the member for delimiting being sandwiched therebetween, with the member for delimiting being a 1 st space region of the absorbent polymer in the member for delimiting.
In consideration of the manufacturing method, for example, the absorbent polymer may be spread on the 1 st sheet and then covered with the 2 nd sheet to realize the bonding for scribing. In this case, the absorbent polymer may be interposed between the 1 st sheet and the 2 nd sheet, which may make the joining difficult, whereas the following advantages can be expected if a member for definition is interposed: the 1 st space region of the absorbent polymer can be defined by the defining member, and the 1 st sheet and the 2 nd sheet can be easily and reliably bonded to each other.
The absorbent sheet may be disposed between a liquid-permeable sheet and a liquid-impermeable sheet to constitute a disposable wearing article.
In this case, if the front-back direction of the wearing article, for example, the disposable diaper, is aligned with the gravity movement direction of the absorbent polymer, the absorbent polymer can be moved to the crotch region where higher absorption capacity is desired, and therefore the absorption capacity as the wearing article can be improved.
ADVANTAGEOUS EFFECTS OF INVENTION
As described above, according to the present invention, when applied to a product, the occurrence of excessive concentration of the absorption capacity as the whole target region can be suppressed, and thereby the absorption capacity can be improved.
Drawings
FIG. 1 shows the whole absorbent sheet, (a) is a plan view showing the barrier section through the 1 st sheet, (b) is a schematic longitudinal sectional view, and (c) is a cross-sectional view.
Fig. 2 is a plan view of the spatial area of the absorbing sheet.
Fig. 3 is a plan view of the spatial area of the absorbing sheet.
Fig. 4 is a plan view of the spatial region of the absorbing sheet.
Fig. 5 is a plan view of the spatial region of the absorbing sheet.
Fig. 6 is a plan view of the spatial region of the absorbing sheet.
Fig. 7 is a plan view of the spatial region of the absorbing sheet.
Fig. 8 shows another embodiment, in which (a) is a plan view of the sizing member and (b) is a cross-sectional view of the absorbent sheet with the sizing member interposed therebetween.
Fig. 9 is a plan view showing the front side of the disposable diaper in the developed state in the outer (outer) inner set type.
Fig. 10 is a plan view of the back side showing the developed state of the disposable diaper with the outer-article-setting type.
Fig. 11 is a sectional view a-a of fig. 9.
Fig. 12 is a B-B sectional view of fig. 9.
Fig. 13 is a cross-sectional view C-C of fig. 9.
Detailed Description
AS shown in fig. 1 and 2, in a specific example of the absorbent sheet AS of the present invention in which the above-described problems are solved, an absorbent polymer is provided in a 1
In the 1
In the 1
That is, the
Thus, alternately flows down through the
The
As a result, even when the absorbent sheet is applied to a wearing article, even if the absorbent polymer moves by gravity in accordance with the posture of the wearer, the resistance to the movement by gravity of the polymer is increased by the stopper portion, and therefore the polymer can be prevented from being concentrated on the side on the lower side of the movement by gravity, and therefore, the absorbent polymer can be absorbed in a dispersed state without being excessively concentrated on the entire 1
For example, when the front-back direction of a disposable diaper is applied as the gravitational movement direction (direction 1 (1)) of the absorbent polymer (front-back direction BF in fig. 1), the polymer tends to concentrate in the crotch portion due to gravitational movement in a standing posture, but the
As shown in the drawing, the
By providing two or
The barrier rows may be formed in two or more. That is, for example, as shown in fig. 1, a pair of left and right barrier rows may be formed in the 1
In this embodiment, referring to fig. 1 and 2, one end of the
As a result, the absorbent polymer moves downward along the
By changing the direction of movement alternately in this way, the blocking effect by the
As shown in fig. 3 (b), a space S2 through which the absorbent polymer can pass may be formed between the
On the 1
However, if the spacing portion S2 through which the absorbent polymer can pass is formed between the
As shown in fig. 3 (c), when the hook portion 4a is formed at the tip of the
As shown in fig. 3 (d), the inclination angle of the
The shape of the stopper may be appropriately selected, and may be, for example, a mountain-shaped
The number of the
That is, by forming many small spaces and forming the
If necessary, two or more 1
In fig. 5, two or more 1
The 2 nd
In fig. 5, although the absorption capacity in the 1
Further, as shown in fig. 1, when a disposable article including an absorbent sheet is worn and the absorbent sheet repeats a case where one end portion side of the 1 st direction (1) faces downward and a case where the other end portion side faces downward by the movement of the wearer, when the direction of the
This phenomenon can be applied. For example, as shown in fig. 6, the absorbent polymer is made larger at the center C of the absorbent sheet and the end in the 1 st direction (1) is made smaller, but in the case where it is desired to prevent excessive concentration at the center C, the embodiment shown in fig. 6 is preferable.
That is, the following phenomenon occurs when the absorbent sheet is worn with the crotch of the wearer positioned at the center C of the absorbent sheet.
In the group of the 1
The barrier portion of the present invention may be in the form of a dotted line as shown on the right side of fig. 7, in addition to being in the form of a line. The interval of the dots can be appropriately selected.
At least one of the 1
In order to improve the mobility of the absorbent polymer, a nonwoven fabric having a smooth surface using long fibers, such as a spunbond method, is preferable, and a nonwoven fabric having a rough surface using short fibers, such as a through-air method, is preferable in order to suppress the mobility.
The absorbent polymer of the present embodiment is preferably in a granular form so as to be freely movable in the 1
The amount of the
As the absorbent polymer, various known absorbent polymers used for absorbent articles can be used. Examples of the polymer include sodium polyacrylate, acrylic acid-vinyl alcohol copolymer, crosslinked sodium polyacrylate, starch-acrylic acid graft polymer, isobutylene-maleic anhydride copolymer and saponified product thereof, potassium polyacrylate, and cesium polyacrylate.
As a joining method for joining the 1
As a bonding method, for example, after the absorbent polymer is scattered on the 1
In this joining method, the absorbent polymer may be interposed between the 1
That is, in addition to the case where the 1
When the
As a method of bonding the barrier, for example, ultrasonic embossing, hot embossing, an adhesive (e.g., a hot melt adhesive), or the like can be used. Ultrasonic embossing is particularly preferred.
The absorbent sheet of the present invention can be disposed between a liquid-permeable sheet and a liquid-impermeable sheet to constitute a disposable wearing article.
In this case, if the front-back direction of the wearing article, for example, the disposable diaper, is aligned with the gravity movement direction of the absorbent polymer, the absorbent polymer can be moved to the crotch region where higher absorption capacity is desired, and therefore the absorption capacity as the wearing article can be improved.
Examples of wearing articles to which the absorbent sheet of the present invention is applied include extended disposable diapers such as tape disposable diapers, disposable underpant diapers, sanitary napkins, pantiliners, and incontinence pads. Further, the present invention can be suitably used for an outer-side-article-mounting type (pad type) disposable diaper which is used by being mounted on the inner surface of an outer-side article such as a diaper or a disposable diaper.
A structural example of the disposable diaper of the inside-outer-article set type (pad type) will be described.
Fig. 9 to 13 show a disposable diaper (hereinafter referred to as "pad diaper") 200 of the in-outer-body set type (pad diaper "). The
The
On the back side of the absorbent sheet AS, a liquid-
The outer surface (back surface) of the liquid-
The
The front surface side of the absorbent sheet AS is covered with the liquid-permeable top sheet 22. In the illustrated embodiment, the absorbent sheet AS partially protrudes from the side edge of the liquid-permeable top sheet 22, but the width of the top sheet 22 may be increased so that the side edge of the
The
The liquid-
The portions other than the end flap portions EF and the side flap portions SF in which the absorbent body is interposed constitute a main body portion for holding excrement.
As the material of the
The
In both the
As shown in fig. 10 to 13, the pressure-
In the illustrated example, the fixing portions are provided continuously in the front-rear direction, but may be provided on the abdomen-side portion F1 and the back-side portion B1, or may be provided only on either side. In the case where a plurality of fixing portions are provided, at least one is preferably provided in each of the ventral portion F1 and the dorsal portion B1.
Description of the symbols
AS … absorbent sheet, 1 … 1 st sheet, 2 … nd sheet, 2
- 上一篇:一种医用注射器针头装配设备
- 下一篇:短裤型一次性尿布