JP2009082484A - Disposable diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper which is appropriate for infants, especially premature or low-weight infants, and disrupts no treatment or no nursing care in medical facilities including hospitals. <P>SOLUTION: This disposable diaper comprises an absorbent body 10 extending so as to cover from the back through the crotch to the abdomen, belt parts 20 protruding toward the horizontal direction from both sides of the back-side part of the absorbent body 10, and a self-adhesive layer 31 attachably and detachably connecting a part 21 protruding one side of the absorbent body 10 of the belt part 20 and a part 22 protruding from the other side; and does not comprise a means that the belt parts 20 catch the absorbent body 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article suitable for use in infants, particularly premature infants and low birth weight infants, in medical facilities such as hospitals.

Premature babies and low birth weight babies are raised in incubators in the neonatal intensive care unit (NICU). And even in such premature babies and the like, as in other newborn babies, a normal tape-type disposable diaper (see, for example, Patent Documents 1 and 2) is currently used.
However, premature babies and low birth weight babies have a problem that treatment and nursing are hindered with ordinary tape-type paper diapers because a medical instrument such as a drip tube is attached to the part where the diaper is worn. In addition, since the locking means attached to the left and right flaps are used and locked individually to the diaper main body, the diaper replacement and the excretion state cannot be confirmed quickly. Furthermore, ordinary tape-type diapers are provided with adhesive or hook-and-loop fastener locking means, and in particular there is no risk of sticking to the skin of the wearer, and a hook-and-loop fastener-type diaper is less likely to decrease the fastening force even after repeated attachment and detachment. However, in the case of a hook-and-loop fastener type, if you wear it quickly, the male material will be caught by the cloth-like non-woven fabric used for the exterior sheet, and it will not be possible to change diapers quickly. there were.
JP 2006-136702 A Japanese Patent Laid-Open No. 2005-287871

  Therefore, a main object of the present invention is to provide a disposable diaper that is suitable for use by infants, particularly premature infants and low-weight infants, in medical facilities such as hospitals and does not interfere with treatment and nursing.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
An absorbent main body extending from the dorsal side to the ventral side through the crotch, and
An outer layer sheet made of a nonwoven fabric covering the outermost layer of the absorbent main body,
A belt portion projecting from the back side portion of the absorbent main body to both sides in the width direction;
A connecting means for detachably connecting a portion protruding from one side of the absorbent main body and a portion protruding from the other side of the belt portion in the belt portion;
No means for locking the belt portion to the exterior sheet,
A disposable diaper characterized by that.

(Function and effect)
In the disposable diaper of the present invention, a premature baby or the like is placed on the absorbent main body, the portions protruding from both sides of the absorbent main body in the belt portion are wound around the waist and the legs and removably connected, and then from the back side It can be worn by applying an absorbent main body so as to cover the ventral side through the crotch. After the belt part is connected to each other by wrapping around the waist, the absorbent body can be put between the belt part and the body. Therefore, an absorptive main body can be held in a predetermined position (position which receives excrement) to a body, and it is hard to shift. Therefore, the excrement is prevented from being scattered and the local area is not exposed, so that the guardian can be reassured. Moreover, since the belt portion is not locked to the absorbent main body, the absorbent main body can be easily opened and does not hinder treatment or nursing.

<Invention of Claim 2>
The belt portion has a portion that overlaps the back surface of the absorbent main body, and a portion that protrudes to one side and the other side in the width direction, and the width direction of the portion that overlaps the absorbent main body in the belt portion. The disposable diaper of Claim 1 by which only the intermediate part of is joined to the back surface of the said absorptive main body.

(Function and effect)
With such a structure, when the belt part and the absorber body are joined at a part of the overlapping part instead of the entire overlapping part, the movable range of the belt part with respect to the absorbent main body (degree of freedom of movement) Is preferable because it can be used in various ways.

<Invention of Claim 3>
The disposable diaper according to claim 2, wherein a joint portion between the belt portion and the absorbent main body has a circular shape, an elliptical shape, an inverted triangular shape, a diamond shape, a cross shape, or a linear shape.

(Function and effect)
It is preferable that the belt portion and the absorber main body are joined in such a planar shape because the movable range (degree of freedom of movement) of the belt portion with respect to the absorbent main body is widened and can be used in various forms of use.

<Invention of Claim 4>
The connecting means includes a male material of an adhesive layer or a hook-and-loop fastener provided in a portion protruding from one side of the absorbent main body in the belt portion, and a portion protruding from the other side of the absorbent main body in the belt portion. The disposable diaper of any one of Claims 1-3 comprised by the part which the male material of the said adhesive layer or a hook_and_loop | surface fastener latches among them.

(Function and effect)
By employing such a connecting means, the belt portion can be connected in an annular and detachable manner. A hook-and-loop fastener that does not stick to the skin is particularly suitable for premature babies and the like.

<Invention of Claim 5>
The connecting means includes a first cut extending from an upper end to a lower end side of a portion of the belt portion that protrudes from one side of the absorbent main body, and a protrusion from the other side of the absorbent main body of the belt portion. The disposable diaper of any one of Claims 1-3 comprised by the 2nd cut extended toward the upper end side from the lower end of the part to do.

(Function and effect)
In this connection means, the belt portion can be connected in an annular and detachable manner by meshing the first cut and the second cut. This form has the advantage that it is easy to manufacture because only the cut is provided, and it is low cost because it does not require another material.

<Invention of Claim 6>
The connecting means is provided at a tip insertion portion of a portion protruding from one side of the absorbent main body in the belt portion and a tip difference provided at a portion of the belt portion protruding from the other side of the absorbent main body. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is configured by a through portion into which the insertion portion is inserted.

(Function and effect)
In this connecting means, the belt portion can be connected in an annular and detachable manner by inserting the leading end insertion portion on one side of the belt portion into the penetrating portion on the other side. Since this form only provides an insertion part and a penetration part, there is an advantage that it is easy to manufacture and low cost because it does not require another material.

<Invention of Claim 7>
When a position 50 to 80 mm away from the front-rear direction center of the absorbent main body is the first position, and a position 50 to 80 mm away from the front-rear center of the absorbent main body is the second position The elastic elastic member is continuously fixed from the first position to the second position of the absorbent main body in a state of 150 to 250% extending along the front-rear direction, and the front-rear center of the absorbent main body The disposable diaper according to any one of claims 1 to 6, wherein a stretch rate of the elastic stretch member on the front side in the front-rear direction of the absorbent main body is higher than a stretch rate of the elastic stretch member on the rear side.

(Function and effect)
By having such an elastic expansion and contraction member, the absorbent main body can be bent in an arc shape along the portion from the back side through the crotch portion to the abdomen side, and the state can be maintained elastically. Therefore, the absorptive main body can be easily opened for treatment and nursing, and can be automatically or easily returned to the original state.

  As described above, according to the present invention, there are advantages such as being able to be worn on the body but not hindering treatment and nursing.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 to 3 show a disposable diaper 1 according to the present invention. The disposable diaper 1 includes an absorbent main body 10 that extends from the back side through the crotch portion to cover the abdominal side, and a belt portion 20 that protrudes from the back side portion of the absorbent main body 10 to both sides in the width direction. Although it has a basic configuration and is characteristically provided with a connecting means for detachably connecting a portion protruding from one side of the absorbent main body 10 and a portion protruding from the other side of the belt body 20, the belt Means for locking the portion 20 to the absorbent main body 10 is not provided.

The absorptive main body 10 is basically rectangular and has a shape in which corners are trimmed into arcs. Such a shape has an advantage that the peripheral edge portion does not have an acute corner portion, and thus the skin is hardly damaged during use. The dimensions of the absorbent main body 10 can be, for example, about 10 to 300 mm in length 10L and about 50 to 150 mm in width 10W. The thickness of the absorbent main body 10 having the absorbent body 4 is preferably, for example, a thickness To (initial thickness) of 2 to 5 mm, particularly 3 to 4 mm at a pressure of 0.5 g / cm ² . The thickness Tm (absolute thickness) at 50 g / cm ² ) is preferably 0.5 to 3 mm, particularly preferably 1 to 2 mm. Moreover, it is preferable that the bending rigidity in the front-back direction of the absorptive main body 10 is 1-25 cN / 50mm. Within this range, the bulge and warpage of the article described later can be easily achieved. Note that To and Tm are measured by a compression test using a KES-FB3-AUTO-A automated compression tester based on KES (Kawabata's Evaluation System for Fabrics). Measurements between steel plates with circular plane of compression area 2 cm ^2, the sample was compressed from 0 gf / cm ² to a maximum compressive load 50 gf / cm ^2, carried out between undo. The initial thickness To is the thickness of the sample at a pressure of 0.5 gf / cm ² . The absolute thickness Tm is the thickness of the sample at a pressure of 50 gf / cm ² . The bending stiffness (rigidity) is measured by the following method in accordance with JIS K 7171 (Plastic—Bending stiffness test method). For the measurement, a tensilon tester (curvature radius R1 = 5.0 ± 0.1 mm at the tip of the indenter, curvature radius R2 = 5.0 ± 0.2 mm at the tip of the support plate) is used, and the portion where the absorber 4 exists Measure the bending stiffness in the front-rear direction of the diaper. The test piece is prepared by removing the elastic elastic member that affects the measurement from the diaper and cutting it into a rectangle having a diaper longitudinal direction of 80 mm and a diaper width direction of 50 mm. 50 mm in the unit of the flexural rigidity value is the length of the short side of the test piece, and is the width of the test piece bent with the indenter at the time of the test. On the pair of support plates each having a tip portion having an arcuate cross-section, the interval between the tips (upper ends) of both tip portions being 50 mm, arranged in parallel with each other and the height positions of both tip portions being aligned, The test piece is placed so that its longitudinal direction is directed in a direction perpendicular to each plate, and the tip of the indenter is arranged so as to slightly touch the test piece. A load-deflection curve is obtained by lowering the indenter under conditions of a load cell of 5 kg (range 196 cN) and a speed of 30 mm / min. Let the maximum value of the obtained bending stress be a bending rigidity value (cN / 50 mm).

As can be seen from the cross section of FIG. 3, the absorbent main body 10 is interposed between the liquid-permeable surface sheet 2 positioned on the skin side, the liquid-impermeable back sheet 3 positioned on the outer surface side, and the liquid-permeable surface sheet 2. A planar article having an absorbent body 4. The top sheet 2 and the back sheet 3 are bonded to each other at the peripheral edge 5, and the absorber 4 is accommodated in a space surrounded by the bonding portion. The absorber 4 is bonded to the back sheet 3. The joining method is not particularly limited, but it is preferable to join with hot-melt adhesives 5b and 4b because the joining portion is hardened by heat sealing or ultrasonic sealing. An exterior sheet made of a material such as a non-woven cloth is provided on the outer surface of the back sheet 3, but it is a target tape for fastening such as a general tape-type paper diaper, or a gap such as a sanitary napkin. There is no fixing means such as an adhesive for stopping or a release paper covering the same.
As materials for these parts, known materials can be appropriately used. For example, as the surface sheet 2, in addition to various non-woven fabrics having a basis weight of about 15 to 35 g / m ² , a perforated film having a large number of holes can be used. Antioxidants that suppress oxidative deterioration, skin care ingredients such as animal and vegetable oils and fats and emollients and humectants such as glycerin fatty acid esters that retain moisture in the stratum corneum of the skin and soften the skin can be contained. The nonwoven fabric is not particularly limited, such as air-through, point bond, and spun bond. However, when the skin care component is applied to the top sheet 2 at the raw material stage (raw cotton), a short fiber nonwoven fabric is preferable, and the skin care component is applied on the product production line. If processed, a spunbonded nonwoven fabric with high surface smoothness is preferred.

As the back sheet 3, a non-breathable film or a breathable porous film made of a polyethylene film or the like can be used. As the exterior sheet, various nonwoven fabrics having a basis weight of about 10 to 40 g / m ² , particularly laminated nonwoven fabrics such as an SMS nonwoven fabric and an SMMS nonwoven fabric can be suitably used from the viewpoint of achieving both strength and flexibility.
As the absorbent body 4, it is possible to use a laminate of pulp fibers, an aggregate of filaments such as cellulose acetate, or a nonwoven fabric, and a mixture obtained by mixing and fixing a superabsorbent polymer as necessary. . The absorber 4 is preferably formed by an airlaid method in order to reduce the thickness. The fiber basis weight in the absorbent body 4 is preferably about 80 to 150 g / m ² , and the polymer basis weight is preferably about 90 to 160 g. As the superabsorbent polymer used for the absorber 4, an antibacterial polymer is preferable. The absorbent body 4 has a shape such as a rectangle or an hourglass, and can be packaged with a liquid-permeable sheet such as thin paper as necessary.
Moreover, in the absorptive main body 10 of the illustrated form, the elastic elastic member 6 extends in the front-rear direction between the peripheral edge 2e of the topsheet 2 and the peripheral edge 3e of the backsheet 3 on both sides in the width direction. It is fixed. The elastic elastic member 6 is fixed by a hot melt adhesive that joins the peripheral edge 2e of the top sheet 2 and the peripheral edge 2e of the back sheet 3.

The elastic elastic member 6 is preferably an elongated member such as rubber thread as in the illustrated example, but a sheet-like or net-like member can be used. The thread rubber preferably has a thickness of 470 dtex or more, and the material may be either synthetic or natural.
The elastic expansion / contraction member 6 is preferably provided in the peripheral portion 5 that does not have the absorber 4 as in the illustrated embodiment, but can also be provided between the topsheet 2 and the absorber 4, and in this case, the width of the absorber 4 It can also be provided along both sides in the direction or along the center in the width direction of the absorber 4.
The elastic elastic member 6 has a first position that is 50 to 80 mm away from the front-rear center of the absorbent main body 10 and a second position that is 50 to 80 mm away from the front-rear center of the absorbent main body 10. When the position is 2, it extends continuously in a range 6L from the first position to the second position of the absorbent main body and is fixed in a state of 150 to 250% extending along the front-rear direction. Is preferred. Further, the stretch rate of the elastic stretch member on the front side in the front-rear direction of the absorbent main body 10 is about 20 to 80%, preferably 40-60, than the stretch rate of the elastic stretch member on the back side from the center in the front-rear direction of the absorbent body 10. It is more preferable that it is made higher by about%. In addition, as a method of making the elastic expansion / contraction member different in the front and back, one elastic expansion / contraction member may be fixed so that the expansion ratio is different between the front and rear, but two elastic expansion / contraction members having different expansion ratios may be used. May be provided separately on the front side and the rear side.
When such an elastic elastic member 6 is provided, the absorbent main body 10 reaches the abdominal side from the back side through the crotch part as shown in FIG. 4 due to the contraction force of the elastic elastic member 6 acting. The absorbent main body 10 can be bent in an arc along the portion, and the state can be maintained elastically. Therefore, the absorptive main body 10 can be easily opened during treatment or nursing, and can be automatically or easily returned to the original state.

On the other hand, the belt portion 20 is a belt-like member having a portion 23 that overlaps the back surface of the absorbent main body 10 and portions 21 and 22 that protrude to one side and the other side in the width direction. Of the overlapping portion 23, only the intermediate portion 23 c in the width direction is bonded to the back surface of the absorbent main body 10. The portions 21 and 22 protruding from both sides in the width direction of the absorbent main body 10 in the belt portion 20 are formed by an integral belt-like member as shown in the figure, and are formed separately and attached to the absorbent main body 10 individually. You can also.
Although the raw material of the belt part 20 can be determined suitably, nonwoven fabrics, such as a spun bond nonwoven fabric and an SMS nonwoven fabric, are suitable, and it is preferable that a basic weight is 13-35 g / m < ² > from a viewpoint of ensuring intensity | strength. It is also preferable that the belt part 20 has the elasticity of the width direction. For this purpose, in addition to using a so-called stretchable nonwoven fabric as the material of the belt portion 20, a plurality of nonwoven fabrics are bonded together, and an elastic stretchable member such as rubber thread or rubber sheet is fixed in a stretched state in the width direction therebetween. It is also possible to use a belt-like member formed of When a plurality of non-woven fabrics are laminated, it is preferable that the total basis weight does not exceed 50 g / m ² .
The dimensions of the belt portion 20 may be determined as appropriate, but the total length (length in the diaper width direction in the unfolded state) is about 300 to 400 mm, and the width (length in the diaper front and rear direction in the unfolded state) is 15 to 40 mm. Is appropriate.

Although the joining method of the belt part 20 and the back surface of the absorptive main body 10 is not particularly limited, the joining part is hardened by heat sealing or ultrasonic sealing. Further, if the joining portion between the belt portion 20 and the back surface of the absorbent main body 10 is only the intermediate portion 23c in the width direction of the portion 23 overlapping the absorbent main body 10 in the belt portion 20 as shown in the drawing, the absorbent portion is obtained. The range of motion (degree of freedom of movement) of the belt portion 20 with respect to the main body 10 is widened, which is preferable because it can be used in various forms of use. Specifically, it is appropriate that the intermediate portion 23c has a width of 3 to 40 mm, particularly 5 to 20 mm, and a length in the front-rear direction of 15 to 40 mm, particularly 20 to 30 mm. It can also be all the part 23 which overlaps with the absorptive main body 10 in the belt part 20. FIG.
The shape of the joint portion 23c between the belt portion 20 and the back surface of the absorbent main body 10 can be determined as appropriate. In addition to being circular as shown in FIG. 8 (a), it may be elliptical or shown in FIG. 8 (b). As shown in FIG. 8C, a diamond shape, a rectangle (not shown), a cruciform shape, or a linear shape (not shown) is used. )can do. It is preferable that the belt portion 20 and the absorbent body 10 are joined in such a planar shape because the movable range of the belt portion 20 with respect to the absorbent main body 10 (particularly, the degree of freedom of operation in the crotch direction) is widened. In addition to continuously joining the whole of the joining portion 23c, the joining portion 23c can be joined intermittently like a dotted shape, or only the peripheral portion can be joined continuously or intermittently.
The connection means for connecting the belt portion 20 in an annular and detachable manner is not particularly limited. As shown in FIG. 9A, an adhesive layer 31 is provided on an outer surface (or an inner surface) of a portion 21 protruding from one side of the absorbent main body 10 in the belt portion 20, and this adhesive layer 31 is absorbed. You may comprise so that it may connect by making it adhere to the inner surface (The opposite outer surface when providing an adhesive layer in the inner surface of the belt part 20) of the part 22 which protrudes from the other side of the adhesive main body 10. FIG. In this case, it is preferable to attach a target film suitable for adhesion of the pressure-sensitive adhesive layer 31 to the inner surface of the portion 22 protruding from the other side. When the adhesive material layer 31 adheres to the skin, it is easy to damage the skin when it is peeled off. In addition, during storage, the adhesive layer 31 is covered with a cover sheet that has been subjected to a release treatment, or a release treatment layer is provided adjacent to the adhesive material layer 31 on the belt portion 20, At the time of storage, the portion provided with the pressure-sensitive adhesive layer 31 is folded back and bonded to the release treatment layer.

A male material of a hook-and-loop fastener can be used instead of the adhesive layer 31. In this case, a female material of the hook-and-loop fastener can be attached instead of the target film. It is preferable to comprise a non-woven fabric that can be easily engaged. If it does so, size adjustment at the time of connecting belt part 20 annularly can be performed freely. Moreover, it is preferable that an exterior sheet does not engage with the male material of a hook_and_loop | surface fastener, or weakens an engaging force. If it does so, a male material will not be caught by an exterior sheet at the time of wearing. Specifically, the engagement force between the male material and the belt portion 20 is preferably 60 gf / 20 mm or more, particularly preferably 100 gf / 20 mm or more, and the engagement force between the male material and the exterior sheet is 40 gf / 20 mm or less, particularly 25 gf / 20 mm. It is preferable that: In addition, the measuring method of this engagement force is measured as follows. First, a male material of a hook-and-loop fastener is cut out from the belt portion 20 so as to be 20 mm or more in the vertical direction of the diaper and 20 mm or more in the width direction of the diaper to obtain a male material sample. Two cloth tapes of width 50 mm × length 100 mm are woven in the width direction to form a double-fold cloth tape of width 25 mm × 100 mm, and an end corresponding to the base side in the diaper of the male sample is formed on one end of the cloth tape. Affix firmly. At this time, the male material of the hook-and-loop fastener is positioned outside the tip of the cloth tape. On the other hand, a female material of a hook-and-loop fastener as a sample is attached to a stainless steel flat plate with a double-sided adhesive tape with the engaged surface as the upper surface. Furthermore, both ends are fixed with craft tape. Next, after the male material and the female material are brought into contact with each other, they are reciprocated once from the cloth tape side with a roller having a mass of 2 kg to be pressure-bonded. Further, a weight of 1 kg is suspended from the end of the cloth tape opposite to the side where the male material is applied for 10 seconds to apply a shearing force to the crimped portion, thereby ensuring the locking of the male material and the female material. Thereafter, the end of the cloth tape opposite to the male material application side and the stainless steel plate are chucked with a jig of a tensile tester. At this time, with respect to the stainless steel flat plate, the tension direction of the jig for chucking the end of the cloth tape opposite to the male material application side is set to 90 °. Thus, after setting the jig on the tensile tester so that the final peel angle is 90 °, the crimped part is peeled off at 300 mm / min, and the uneven weight average value measured at that time is used as the engaging force. The measured value is an average of 3 to 10 effective measured values. In addition, the sample is placed in the measurement so that the measurement is performed in the width direction of the diaper. A tensile tester (AUTOGRAPH AGS-G100N manufactured by SHIMADZU) can be used for the engagement force test. In addition, when the dimension of the male material used as a sample is smaller than 20 mm, it measures with the sample of the dimension below it, and calculates engagement force by proportional calculation.
The male material of the hook-and-loop fastener is less likely to damage the skin than the adhesive layer, but it is more preferable to use a soft type male material that is softer than a normal material. For example, a male material formed from a resin in which polypropylene and polyethylene are mixed is flexible and suitable, and among them, a material having a higher ratio of polyethylene is more preferable. The shape of the male material is preferably a shape close to a circle without corners, such as a chamfered rectangle, rather than a square with corners.

These pressure-sensitive adhesive layers 31 and the like are relatively strong connecting means and are also used in general tape-type diapers, so there is an advantage that the threshold is low in use, but premature babies and the like have little movement, Means that are easier to attach and detach can also be used.
For example, as shown in FIG. 9B, a slit-shaped first notch 32 extending in the vertical direction from the upper end to the lower end side of the portion 21 protruding from one side of the absorbent main body 10 in the belt portion 20 is formed. A slit-like second notch 33 extending in the vertical direction from the lower end of the portion 22 projecting from the other side toward the upper end side is provided, and the first notch 32 and the second notch 33 are shown in the right figure. As shown in Fig. 5, a form of coupling by meshing is also preferable. Since this form only provides the notches 32 and 33, it has the advantage that it is easy to manufacture and does not require another material, and is low cost. A plurality of the first and second cuts 32 and 33 may be provided in the longitudinal direction (diaper width direction) of the belt portion 20, and the connection position can be adjusted by changing the cuts to be engaged.

Moreover, as shown in FIG.9 (c), the front-end | tip part of the part 21 which protrudes from the one side of the absorptive main body 10 in the belt part 20 is made into the insertion part 34, and the insertion part is inserted in the part 22 which protrudes from the other side. It is also preferable to form a through portion 35 into which 34 is inserted and to connect by inserting the leading end insertion portion 34 on one side of the belt portion 20 into the through portion 35 on the other side. This form also has an advantage that it is easy to manufacture because it only forms the insertion part 34 and the penetration part 35 and is low in cost because it does not require another material.
Although the dimensional shape of the insertion part 34 and the penetration part 35 can be determined suitably, it is preferable that the penetration part 35 has a slit shape or a hole shape along the vertical direction. It is preferable to have the latching part 34a wider than the direction width 35w. When inserting the insertion part 34 into the penetration part 35, if the latching part 34 a is bent and inserted into the penetration part 35, the latching part 34 a is latched to the penetration part 35. The opposite is true when removing. In particular, when the both side edges (upper and lower edges) are wave-like or zigzag like the insertion part 34 in the illustrated form, and a plurality of hooking parts 34a are formed in the longitudinal direction (diaper width direction) of the belt part 20, the connecting position Can be adjusted.
In the present invention, in addition to these, known connection means such as buttons and hooks can be used.

  The disposable diaper 1 configured in this way is not limited by the form of use. For example, as shown in FIG. 5, a premature baby or the like is placed on the absorbent main body 10 and both sides of the absorbent main body 10 in the belt portion 20. After the portions 21 and 22 protruding from the body are wrapped around the waist and detachably connected, the absorbent main body 10 can be attached by covering the back to the abdomen through the crotch. Therefore, the absorptive main body 10 can be hold | maintained with respect to a body in the predetermined position (position which receives excrement), and it is hard to shift | deviate. Therefore, the excrement is prevented from being scattered and the local area is not exposed, so that the guardian can be reassured. And since the belt part 20 is not latched to the absorptive main body 10, the absorptive main body 10 can be opened easily and does not become a hindrance to treatment and nursing.

  Premature infants and low-weight infants have limited body movements, so they do not open without locking the absorbent main body 10 with the belt part 20, but as shown in FIG. The front end portion of the sex body 10 may be sandwiched between the belt portion 20 wound around the waist and the body. Even if it mounts | wears in this way, the absorptive main body 10 can be opened easily. As an operation for opening the absorbent main body 10, the absorbent main body 10 may be opened by being pulled out between the belt portion 20 and the body. In this case, the absorbent main body 10 is opened as compared with the embodiment shown in FIG. It is a little troublesome. In such a case, if the absorbent main body 10 is opened while being sandwiched, the absorbent main body 10 is not fixed by the belt portion 20, so that the protruding portions 21 and 22 of the belt portion 20 slide downward. As shown in FIG. 7, the absorbent main body 10 can be easily opened. In this case, the absorbent main body 10 can be opened to the lower abdomen or the local part. When the absorbent main body 10 is closed, the position of the belt portion 20 may be simply corrected. In the case of such use, it is preferable that the belt portion 20 has a stretchability in the width direction as described above, and the absorbent main body so that the movable range of the belt portion 20 is widened as described above. It is preferable that the exterior sheet has an average friction coefficient (MIU) measured by a surface property test based on the KES method of 0.25 or less, particularly 0.18 or less. For measurement of the average coefficient of friction (MIU), a friction tester, KES-SE (manufactured by Kato Tech) is used. In the measurement, a friction piece for surface friction having a width of 5 mm is set by bundling 10 contacts in which a 0.5 mm diameter piano wire is bent in a U-shape by setting the sample on the sample stage so as not to sag. The sample surface is brought into contact with the weight under a load of 50 gf, and the sample stage is moved 2 cm in the horizontal direction at a constant speed of 0.1 cm / sec under the condition of sensitivity 25 gf / v. The average value of the friction coefficient of the moving region at this time is taken as the MIU value.

  INDUSTRIAL APPLICABILITY The present invention is suitable for disposable diapers used for infants, particularly premature infants and low-weight infants, in medical facilities such as hospitals.

It is an unfolding state (a part of belt part 20 is folded in the width direction central side) which shows the inner surface side of the disposable diaper concerning the present invention. FIG. 3 is a plan view showing the outer surface side of the disposable diaper according to the present invention (a part of the belt portion 20 is folded to the center in the width direction). It is AA sectional drawing of FIG. It is a side view which shows the state bent by the elastic elastic member. It is a front view which shows a 1st mounting state. It is a front view which shows a 2nd mounting state. It is a front view which shows a 3rd mounting state. It is a top view which shows various junction part shapes. It is a principal part enlarged plan view which shows various connection means.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Disposable diaper, 1A ... Front end side part, 1B ... Base end side part, 2 ... Top sheet, 3 ... Liquid impervious back sheet, 4 ... Absorber, 5 ... Peripheral part, 6 ... Elastic elastic member, 10 ... Absorbent body, 20 ... belt portion, 31 ... adhesive layer.

Claims (7)

An absorbent main body extending from the dorsal side to the ventral side through the crotch, and
An outer layer sheet made of a nonwoven fabric covering the outermost layer of the absorbent main body,
A belt portion projecting from the back side portion of the absorbent main body to both sides in the width direction;
A connecting means for detachably connecting a portion protruding from one side of the absorbent main body and a portion protruding from the other side of the belt portion in the belt portion;
No means for locking the belt portion to the exterior sheet,
A disposable diaper characterized by that.   The belt portion has a portion that overlaps the back surface of the absorbent main body, and a portion that protrudes to one side and the other side in the width direction, and the width direction of the portion that overlaps the absorbent main body in the belt portion. The disposable diaper of Claim 1 by which only the intermediate part of is joined to the back surface of the said absorptive main body.   The disposable diaper according to claim 2, wherein a joint portion between the belt portion and the absorbent main body has a circular shape, an elliptical shape, an inverted triangular shape, a diamond shape, a cross shape, or a linear shape.   The connecting means includes a male material of an adhesive layer or a hook-and-loop fastener provided in a portion protruding from one side of the absorbent main body in the belt portion, and a portion protruding from the other side of the absorbent main body in the belt portion. The disposable diaper of any one of Claims 1-3 comprised by the part which the male material of the said adhesive layer or a hook_and_loop | surface fastener latches among them.   The connecting means includes a first cut extending from an upper end to a lower end side of a portion of the belt portion that protrudes from one side of the absorbent main body, and a protrusion from the other side of the absorbent main body of the belt portion. The disposable diaper of any one of Claims 1-3 comprised by the 2nd cut extended toward the upper end side from the lower end of the part to do.   The connecting means is provided at a tip insertion portion of a portion protruding from one side of the absorbent main body in the belt portion and a tip difference provided at a portion of the belt portion protruding from the other side of the absorbent main body. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is configured by a through portion into which the insertion portion is inserted.   When a position 50 to 80 mm away from the front-rear direction center of the absorbent main body is the first position, and a position 50 to 80 mm away from the front-rear center of the absorbent main body is the second position The elastic elastic member is continuously fixed from the first position to the second position of the absorbent main body in a state of 150 to 250% extending along the front-rear direction, and the front-rear center of the absorbent main body The disposable diaper according to any one of claims 1 to 6, wherein the elastic stretch member on the front side in the front-rear direction of the absorbent main body has a higher stretch rate than the elastic stretch member on the rear side.

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