TW201929818A - Disposable diaper for low-body-weight infant - Google Patents

Abstract

This disposable diaper (1) for low-body-weight infant is provided with an absorbent core (2) having a narrow part in the central part in the longitudinal direction. With the diaper (1), which is folded in two, unfolded and stretched in the longitudinal direction, after being pressed against the upper surface of a base with the skin-facing surface facing downwards, and a plate and weight placed thereupon, achieving a natural state, the absorbent core (2) has a first region (S1) which follows the upper surface and a second region (S2) which is separated upwards from the upper surface, and a separate folding line (FLa) which forms the boundary between the first region (S1) and the second region (S2) is formed.

Description

Disposable diapers for low weight infants

The present invention relates to a disposable diaper for low-weight infants.

Low birth weight babies who are born with low birth weight often spend time lying on their stomachs. Also, for low-weight babies, there is a desire to reduce the number of touches in order to avoid touching the body as much as possible. Patent Document 1 discloses a paper diaper having a cutting line for cutting a part of the hook and loop fastener. According to such a diaper, it is possible to avoid touching the body of a low-weight child when changing. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2016-120077

[Problems to be Solved by the Invention]

The shape of the absorptive core provided in the paper diaper of patent document 1 is a substantially rectangular shape seen from the top. Even in the case of an absorptive core having a narrow width for a low-weight child, a narrow portion having a narrower width than the end portion may be provided in the central portion in the longitudinal direction. In this way, low-weight children tend to move their feet. In addition, when the low-weight child stomps his or her feet, it is possible to suppress the pressure on the skin of the low-weight child with the rigid absorbent core.

On the other hand, if a narrow part is provided in an absorbent core, the length of the sheet part from the side end of an absorptive core to the side end of a paper diaper becomes long. If the diaper is loosely installed so that the thin part of the body touches the foot of the low-weight child, the absorbent core will rise from the intercondylar part and buttocks of the low-weight child when the thin part of the thin part is sandwiched between the foot Concerns.

Here, the object of the present invention is to provide a disposable diaper for a low-weight child who can easily move his feet and improve the fit of the absorbent core to the low-weight child. [Means for solving problems]

The main invention for achieving the above-mentioned object is a disposable diaper for low-weight infants. The disposable diaper has a long-side direction and a wide-side direction, and is provided with an absorptive core at the center of the long-side direction. It has a narrower part with a narrower width than the end part. The width of the center of the absorptive core in the long side direction is 15 mm or more and 45 mm or less. In the packaging state, it is folded low according to the fold line along the wide side direction. The disposable diaper for weight children is characterized in that the side of the disposable diaper that is folded in half is stretched and extended toward the long side, and the side of the skin is pressed down on the table. Then, a full-size board covering the disposable paper diaper is placed on the disposable paper diaper, and a weight of 1 kg is placed on the board and left for 2 minutes. When the weight and the board are brought into a natural state on the upper surface, the absorbent core includes a first region along the upper surface and a second region distant from the upper surface to form an upper surface. Said additional fold line and the boundary of the first region to the second region.其他 Other features of the present invention will be apparent from the description of this specification and the drawings. [Effect of the invention]

According to the present invention, it is possible to provide a disposable diaper for a low-weight child who can easily move the legs of the low-weight child and improve the fit of the absorbent core to the low-weight child.

[Form for Implementing Invention]

At least the following matters are understood from the description in this manual and the attached drawings. Disposable disposable diaper for low-weight infants, having a long side direction and a wide side direction, and an absorbent core. The central portion in the long side direction has a narrower width than the end portion. The width of the center of the absorptive core in the longitudinal direction is 15 mm or more and 45 mm or less. In the packaging state, the disposable paper for low-weight children is folded in half according to the fold line along the width direction. The diaper is characterized in that: the folded disposable diaper is stretched toward the long side and stretched, and the side of the skin is pressed down on the table, and the disposable diaper is covered. A full-size board of a paper diaper is placed on the disposable diaper, and a weight of 1 kg is placed on the board and left for 2 minutes, and then the weight and the board are removed and placed on the board. When the upper surface is in a natural state, the absorptive core has a first region along the upper surface and a second region distant from the upper surface and formed with edges forming the first region and the second region. Other polylines in the world.

According to such a disposable diaper for a low-weight child, the narrow part of the absorbent core makes it easy for the low-weight child to move his feet. Moreover, since the absorptive core is bend | folded in the several position in which a longitudinal direction differs, it is easy to bend along a curved hip. Therefore, the fit of the absorptive core to a low-weight child can be improved.

In such a disposable diaper for low weight infants, the other fold lines are formed on both sides of the fold line in the longitudinal direction.

According to such a disposable diaper for a low-weight child, the absorptive core has many bending start points, and the absorptive core can be easily moved along the buttocks.

In such a disposable diaper for low weight infants, the rigidity in the wide side direction of the absorbent core 2 in the area including the fold line is 1.1 N or less.

According to such a disposable diaper for a low-weight child, when the low-weight child stamps his or her feet, it is possible to suppress the pressure on the skin of the low-weight child due to the absorbent core. Moreover, it is easy to form other fold lines other than the fold line at the time of packaging.

In such a disposable paper diaper, the density of the absorbent core is less than 0.0155 g / cm ³ .

According to such a disposable paper diaper, the absorbent core is soft, and it is easy to form a fold line other than the fold line at the time of packaging.

In such a disposable paper diaper, after the disposable diaper is unfolded and stretched in the direction of the long side, the skin side is placed on the upper surface of the table in a natural state and is perpendicular to the upper surface. The height of the aforementioned disposable paper diaper is less than 70 mm.

According to such a disposable paper diaper, it is not easy to fold the paper diaper in half at the folding line during packaging, and it is easy to install the paper diaper along the absorbent core along the intercondylar portion and the buttocks of a low-weight child. Therefore, the fit of the absorptive core to a low-weight child can be improved.

In such a disposable paper diaper, the folded disposable diaper is folded in the state of being stretched toward the long side and stretched, and the skin side is pressed down on the upper surface of the table and covered. The full-size board of the disposable paper diaper is placed on the disposable paper diaper, a 1 kg weight is placed on the board, and the weight is removed for 2 minutes. When the board is brought into a natural state on the upper surface, the height of the disposable diaper in a direction perpendicular to the upper surface is 60 mm or less.

According to such a disposable paper diaper, even a nurse or the like who takes measures such as rubbing a paper diaper before installation can recognize the good adhesion of the absorbent core to a low-weight child.

In such a disposable paper diaper, the length from the center of the absorbent core to one end of the narrow portion in the longitudinal direction is 22% or more of the length of the absorbent core in the longitudinal direction. length.

According to such a disposable paper diaper, the foot of a low-weight child can be easily pulled up by the narrow portion extending in the long side direction.

In such a disposable disposable diaper, the length from the center of the absorbent core to the other end of the narrow portion in the longitudinal direction is 22% of the length of the absorbent core in the longitudinal direction. Above the length.

According to such a disposable paper diaper, when a paper diaper is usually installed, when it is installed backwards and forwards, it is also possible to easily pull up the foot of a low-weight child by a narrow portion extending in the long side direction.

In such a disposable paper diaper, both ends of the narrow side in the wide-side direction have linear portions along the long-side direction.

According to such a disposable paper diaper, the width of the absorbent core can be narrowed in a wider range in the longitudinal direction, and the feet of a low-weight child can be easily pulled up.

Such a disposable paper diaper has a pair of hook-and-loop fasteners extending from the waist portion on one side in the longitudinal direction to both sides in the wide side direction, and the disposable diaper is directed toward In a state where the long-side direction is unfolded and stretched, the length from the end on the other side in the long-side direction of the disposable diaper to the end on the other side in the long-side direction of the narrow portion is the length. The length in the side direction is equal to or greater than the length in the long-side direction from the one end in the long-side direction of the disposable diaper to the other end in the long-side direction of the hook-and-loop fastener.

According to such a disposable paper diaper, the approximate locking position of the hook-and-loop fastener is not exceeded, that is, the narrow part is not provided beyond the position where the foot of the low-weight child is pulled up, so the narrow part is not unnecessary. Long to ensure the absorbency of the absorbent core.

In such a disposable disposable diaper, in the narrow portion, the first bend induction portion, the second bend induction portion, and the first bend induction portion that induce the bend of the absorbent core in the direction of the broad side are provided. The 3 bend induction portions are arranged in an array in the longitudinal direction.

According to such a disposable paper diaper, when a diaper is usually installed, and when it is installed upside down, the paper diaper can be three-dimensionally deformed to fit a low-weight child who assumes a posture in the womb.

In such a disposable paper diaper, the first bend induction portion is disposed on one side of the long side direction than the second bend induction portion, and the third bend induction portion is more than the second second induction portion. The bending inducing portion is further disposed on the other side in the longitudinal direction, and at least one of the first bending inducing portion and the third bending inducing portion is disposed in a width of the absorbent core in the narrow portion. Narrow the starting area.

According to such a disposable paper diaper, the paper diaper can be bent at the root of the foot on the ventral side of the foot pulled up by the low-weight child, and fit to the body of the low-weight child. Moreover, in a wider range in the long side direction, the width of the absorbent core can be narrowed, and the feet of a low-weight child can be easily pulled up.

In such a disposable paper diaper, the absorbent core has a symmetrical shape in the longitudinal direction.

According to such a disposable paper diaper, a paper diaper can be usually installed, or it can be installed upside down.

In such a disposable paper diaper, a pair of three-dimensional hem portions are arranged on both sides of the wide edge direction of the disposable diaper, and the three-dimensional hem portions are arranged on the long sides. The elastic member for the three-dimensional hemming part that can be stretched in the direction can stand up to the skin side, compared with the expansion and contraction of the elastic member for the three-dimensional hemming part in a state where the disposable diaper is deployed and extended in the long side direction The length of the portion is longer in the longitudinal direction of the narrow portion.

According to such a disposable paper diaper, the elastic member for the three-dimensional hemming portion can be arranged in the narrow portion, and the standing height of the three-dimensional hemming portion can be secured.

=== Implementation Mode === 后 Disposable disposable diapers for low-weight infants are diapers intended for infants up to 3,000 g (particularly under 2500 g). In the following, as an example of the disposable diaper for low weight infants, an adhesive tape type disposable diaper mounted on a low weight infant with a hook and loop tape will be described as an example. However, the disposable diaper for low-weight infants is not limited to an adhesive tape type. For example, the disposable diaper may be provided in the form of a pad without a hook-and-loop fastener.

<<< Structure of adhesive tape type disposable diaper 1> Figure 1 View from the skin side and expands to the long side direction and expands, and it is an adhesive tape type disposable diaper 1 (hereinafter referred to as (A "diaper"). FIG. 2A is a schematic cross-sectional view of the first waistline portion 1A, and FIG. 2B is a schematic cross-sectional view of the lower crotch portion 1B.

The paper diaper 1 has a long side direction and a wide side direction. In the paper diaper 1, a first waistline portion 1A, a lower crotch portion 1B, and a second waistline portion 1C are arranged in the longitudinal direction. As shown in FIG. 2A, the direction in which the members constituting the paper diaper 1 are laminated is referred to as a thickness direction. In the thickness direction, the side in contact with the wearer is called the skin side, and the opposite side is called the non-skin side.

The paper diaper 1 includes: an absorbent core 2 that absorbs excretion liquid; a liquid-permeable top sheet 3 that is arranged on the skin side more than the absorbent core 2; Transmissive leak-proof sheet 4; the outer sheet 5 which is disposed on the non-skin side than the leak-proof sheet 4 to form the outer shape of the paper diaper 1, and is widened from both sides in the widthwise direction of the top sheet 3 A pair of side sheets 6 extending outward in the lateral direction.

The absorbent core 2 can be exemplified by those in which a superabsorbent polymer (so-called SAP) is contained in liquid absorbent fibers such as pulp fibers into a predetermined shape, and the SAP layer is attached to a hydrophilic sheet. Sheets, air-formed sheets in which liquid-absorbent fibers are formed into sheets by an air-form method. The absorbent core 2 may be covered with a core cladding sheet 2A such as a liquid-permeable tissue paper or a non-woven fabric.

A pair of three-dimensional hem portions 8 and a pair of leg circumference elastic members 10 that extend and contract in the longitudinal direction along the legs of the wearer are disposed on both sides of the diaper 1 in the width direction. The three-dimensional hemming part 8 is a part of the side sheet 6 standing up to the skin side by the three-dimensional hemming part elastic member 9 which expands and contracts in the longitudinal direction. Excretion is blocked by the three-dimensional hem portion 8.

The leg circumference elastic member 10 is a starting point for setting up the three-dimensional hemming portion 8 in the wider side direction (the side sheet 6 is attached to the inner side end in the width side direction of the adhesive (not shown) of the top sheet 3). Outside on the wide side. With the leg circumference elastic member 10, the paper diaper 1 is fitted to the leg circumference of the wearer, and leakage of excretion is suppressed.

Examples of the elastic member 9 for the three-dimensional hemming portion and the elastic elastic member 10 for the legs include a thread-like elastic member such as a silk rubber. However, it is not limited to this, and it may be a sheet-like elastic member such as a stretchable film.

In addition, the elastic member 9 for three-dimensional hemming portions and the leg elastic member 10 each have a stretchable portion (effectively long portion) capable of generating stretchability in the longitudinal direction. The elastic member 9 for the three-dimensional hemming part and the leg elastic member 10 are fixed to the sheet in a state of being extended in the longitudinal direction, and become a stretchable part. Only the telescopic part is shown in the drawing.

The paper diaper 1 includes a pair of hook-and-loop fasteners 7 extending from the first waistline portion 1A (the waistline portion on one side in the longitudinal direction) to both outer sides in the widthwise direction. The hook and loop tape 7 includes a tape base material 7A and a hook material 7B. The strip base material 7A is formed in a substantially rectangular shape that is long in the width direction. The hook material 7B is a male member of a flat fastener, for example, and is provided on the skin side of the belt base material 7A.

When the paper diaper 1 is installed, the paper diaper 1 in the unfolded state is folded in half in the approximate center of the longitudinal direction while being attached to the wearer. Next, the both sides of the width direction of the 1st waistline part 1A are turned inward. Finally, the hook material 7B of the hook-and-loop fastener 7 is locked on the non-skin side of the second waistline portion 1C.

The diaper 1 is intended for low-weight children. Therefore, the length (product length L1) of the paper diaper 1 in a state where the paper diaper 1 is stretched and extended in the longitudinal direction (product length L1) may be set to about 175 mm to 330 mm. Specifically, the product length L1 for a person weighing less than 2500 g is set to 310 mm, the product length L1 for a person weighing less than 1500 g is set to 270 mm, and the product length L1 for a person weighing less than 1000 g is set to about 230 mm.

The waist size of the paper diaper 1 may be set to about 160 to 295 mm. Specifically, the size of the waist for a person weighing less than 2500 g may be set to about 273.5 mm, and the size of the waist for a person weighing less than 1500 g may be set to about 220 mm. The size of the waist is a state in which the front end of the one side of the hook-and-loop fastener 7 is aligned with the end on the root side of the hook-side member 7B of the other hook-and-loop fastener 7 in the width-wise direction, and the product is directed toward the broad side. The direction is extended to a size without wrinkles.

<<< Paper diaper 1 is installed upside down >> FIGS. 3A to 3C are explanatory diagrams of the installation state of the paper diaper 1. Among the low-weight babies, especially those born under 2,500 grams, there is a desire to spend time lying on their stomachs. The posture in the fetus refers to a state in which the back is rolled into a C shape as shown in FIG. 3A, while the feet are opened in an M shape as shown in FIG. 3C, and both knees are pulled close to the abdomen. . Hereinafter, such a posture is also referred to as a "curved lying posture".

In addition, there is a desire to reduce the number of touches as much as possible without touching the body of a low-weight child.

Therefore, during the replacement of the diaper 1, the low-weight child is not allowed to lie on his back, but the diaper 1 is passed between the feet of the low-weight child who is lying down, and the low-weight child who is lying down performs the diaper. 1 Replacement case. Therefore, as shown in FIG. 3A, the usual installation is not only installed so that the 1st waistline part 1A provided with the hook-and-loop fastener 7 covers the back side, but as shown in FIG. 3B, the 1st waistline part 1A covers the abdomen Side-by-side installation. When installed backwards and forwards, there is no need to put a hand into the belly of a lying low-weight child to engage and remove the hook-and-loop fastener 7.

Further, the paper diaper 1 may be provided with a cutting line 11 for cutting a part of the first waistline portion 1A to which the hook and loop fastener 7 is fixed. In this way, it is easy to remove the diaper 1 from a low-weight child.

<<< Characteristics of the paper diaper 1 for low-weight children >> FIG. 4A and FIG. 4B are explanatory diagrams of the packaging method of the paper diaper 1. FIG. Fig. 4C is an explanatory view of an installed state of the paper diaper 1 'of the comparative example. FIG. 5 is a plan view of the absorbent core 2. 6A and 6B are explanatory diagrams of the product length L1. 7A and 7B are explanatory diagrams of the viewing product length L2 and the viewing height H2. 6A and 7A are schematic perspective views of the paper diaper 1 during measurement, and FIGS. 6B and 7B are schematic cross-sectional views of the paper diaper 1 during measurement.

The paper diaper 1 is folded in half in the packed state by the fold line FL along the wide side direction. Specifically, as shown in FIG. 4A, after both sides of the wide diaper direction of the paper diaper 1 are folded inward in the wide wise direction, as shown in FIG. 4B, The folding line FL is packed in a state of being folded in half.

Here, "product length L1", "view product length L2", and "view height H2" of the diaper 1 are defined. "Product length L1" refers to the length L1 of the longitudinal direction of the paper diaper 1 in a state where the folded paper diaper 1 is extended in the longitudinal direction (see Figs. 1, 6A, and 6B). "Looking product length L2" refers to the long side direction of the natural diaper 1 after the paper diaper 1 is unfolded and stretched in the long side direction, and the skin side of the paper diaper 1 is placed downward on the table. Length L2 (see FIGS. 7A and 7B). "Viewing height H2" refers to the height of the paper diaper 1 in a direction perpendicular to the upper surface of the table under the above-mentioned natural state (Figs. 7A and 7B).

The state in which the paper diaper 1 is unfolded in the longitudinal direction refers to a state in which the paper diaper 1 is folded open at the time of packaging. The state in which the paper diaper 1 is extended in the longitudinal direction means a state in which the paper diaper 1 is extended in the longitudinal direction to such an extent that the wrinkles generated by the paper diaper 1 are substantially invisible. Specifically, the length of each member (for example, the side sheet 6 and the like) constituting the paper diaper 1 is extended to a length that is equal to or close to the size of the longitudinal direction of the member alone, and The diaper 1 is in an extended state.

As a measurement method of the product length L1, the viewing product length L2, and the viewing height H2, the following methods can be exemplified. First, the folded paper diaper 1 is taken out from the packaging bag. And the center of the width direction of the both ends 1a and 1b of the longitudinal direction of the paper diaper 1 is marked with the marks M1 and M2, respectively.

Next, the paper diaper 1 is extended and extended in the longitudinal direction, and is fixed to the upper surface 30a (horizontal surface) of the test stand 30 (see FIG. 6A). At this time, the non-skin side surface 1c of the paper diaper 1 faces upward, and the skin side 1d of the paper diaper 1 faces downward (opposing the test stand 30). The longitudinal direction of the paper diaper 1 is aligned with the X direction of the upper surface 30 a of the test stand 30. In this state, the length in the X direction (the length in the longitudinal direction of the paper diaper 1) of the one end 1a (imprint M1) to the other end 1b (imprint M2) in the longitudinal direction of the paper diaper 1 is measured. Let the measured length be "product length L1".

Next, the state of elongation in the longitudinal direction is released from the state described above, and the paper diaper 1 is brought into a natural state (see FIG. 7A). The paper diaper 1 has the elastic member 9 for three-dimensional hems, and the leg periphery elastic member 10. Moreover, the paper diaper 1 has the folding line FL at the time of packaging. Therefore, in the natural state of the paper diaper 1, the two elastic members 9, 10 are contracted, and the central portion in the longitudinal direction of the paper diaper 1 is raised like a mountain. In this state, the length in the X direction (the length in the longitudinal direction of the paper diaper 1) of the one end 1a (imprint M1) to the other end 1b (imprint M2) in the longitudinal direction of the paper diaper 1 is measured. The measured length is referred to as "view product length L2". Moreover, the length from the upper surface 30a to the vertex 1e of the paper diaper 1 in the direction orthogonal to the upper surface 30a of the test stand 30 was set as "viewing height H2."

The product length L2 is smaller than the product length L1. The value of the product length L2 divided by the product length L1 (L2 / L1) becomes smaller, which refers to the height of the mountain in the center of the long side of the diaper 1 (viewing). The height H2) becomes higher. That is, it refers to a case where the diaper 1 is easily folded in half in a natural state.

On the contrary, the value of the product length L2 divided by the product length L1 (L2 / L1) becomes larger, which means that the height of the mountain (viewing height H2) in the central part of the longitudinal direction of the paper diaper 1 becomes low, and it is easy to maintain A state where the paper diaper 1 is extended in the longitudinal direction.

Here, the shape of the absorbent core 2 of the paper diaper 1 of this embodiment is demonstrated. As shown in FIG. 5, the absorptive core 2 has the narrow part 2A narrower than the end part in the center part of a longitudinal direction. The width W1 of the center CL of the absorptive core 2 in the longitudinal direction (the center CL that bisects the absorptive core 2 in the longitudinal direction) is 15 mm or more and 45 mm or less.

In the case of the absorptive core 2 of the present embodiment, a pair of cutout portions 22b are arranged at the center CL in the longitudinal direction (the details will be described later). Therefore, the length W1 in the width direction between the vertexes of the pair of notches 22b is 15 mm or more and 45 mm or less. In addition, the width W2 of the absorptive core 2 near the notch portion 22b is also 15 mm or more and 45 mm or less.

Setting the width W1 (W2) of the center CL of the absorptive core 2 in the longitudinal direction to 15 mm or more can ensure the absorptive capacity of the absorptive core 2 and prevent urine leakage. On the other hand, a narrow portion 2A is provided on the absorbent core 2 and the width W1 (W2) of the center CL in the longitudinal direction of the absorbent core 2 is set to 45 mm or less so as to be in contact with the intercondylar portion of a low-weight child. The width of the absorbent core 2 is narrowed. Therefore, low-weight children tend to move their feet. In addition, when the low-weight child stands on his or her feet, it is possible to suppress the skin of the low-weight child from being pressed by the highly rigid absorbent core 2.

However, if a narrow portion 2A is provided in the absorbent core 2, as shown in FIG. 1, the sheet portion (back sheet 5, side) of the leg periphery of the absorbent core 2 in the wide side direction to the side end of the paper diaper 1 The length W3 of the sheet 6 and the like becomes longer. Since the length W3 of the sheet portion around the legs is long, the height of the three-dimensional folded portion 8 can be secured. However, if the paper diaper 1 is loosely installed so that the thin portion of the leg circumference touches the foot of the low-weight child, the absorbent core 2 will move from the low-weight child when the thin portion of the leg circumference is sandwiched between the low-weight foot Concerns floating around the hips and hips.

Therefore, it is sufficient to increase the value (L2 / L1) of the aforementioned product length L2 divided by the product length L1. If the value of the product length L2 divided by the product length L1 (L2 / L1) is reduced, if it is easy to fold the paper diaper 1 in half at the folding line FL at the time of packaging, it is easy to install the absorbent core 2 in a state where it is floating from a low birth weight Set up paper diapers.

This is because nurses who place paper diapers on low-weight infants lay paper diapers under the low-weight babies or pass the paper diapers between the feet of the low-weight babies lying on their backs. The case where the diaper is momentarily folded in half. As a result, the absorbent core 2 cannot easily be installed along the intercondylar portion and hips of a low-weight child, as shown in FIG. 4C, with the folding line FL folded toward the paper diaper 1 'during packaging. That is, the absorptive core 2 is installed in the state which floated from a low-weight child.

Table 1 shows the results of evaluating the fit of the absorbent core 2 to low-weight children by changing the product length L2 divided by the product length L1 (L2 / L1).

Try 5 types of samples 1-5. The product length L1 and the viewing product length L2 of each of the samples 1 to 5 were measured, and 値 (L2 / L1) of the viewing product length L2 divided by the product length L1 was calculated. In addition, the subjects actually mounted each of the samples 1 to 5 on a puppet imitating a low-weight child and evaluated the fit.

The specifications of samples 1 to 5 are described below. The elongation magnification of the elastic member 9 for the three-dimensional hemming part is 1.99 times that of the sample 1, 1.85 times for the sample 2, 1.55 times for the sample 3, and 1.46 times for the sample 4. By. In addition, the elongation factor is the elongation width when the natural length of the elastic member is set to 1, and the strength of expansion and contraction of the elastic member is displayed. The rigidity of the absorptive core in the long-side direction is one in which samples 1 to 3 are high (hard) and samples 4 to 5 are low (soft). In addition, samples 1 to 4 were prepared with leg circumference elastic members 10, and samples 5 were not provided with leg circumference elastic members 10. The product length L1 is 240mm for samples 1 to 3 and 230mm for samples 4 to 5.

The applicability was evaluated by visually observing the puppets installed with each of the samples 1 to 5, or touching the puppet's hips from the samples. The test subject evaluated the sample that felt "the absorptive core 2 floated from the puppet small and had good fit" as "○", and felt that "the absorptive core 2 floated large from the puppet, and The sample with poor adhesion was evaluated as "×".

From the results in Table 1, it can be seen that when samples 1 and 2 whose product length L2 divided by product length L1 is 0.52 and 0.69 are observed, the absorptive core 2 has poor adhesion to low-weight children. On the other hand, it can be seen that when samples 3 to 5 whose product length L2 divided by product length L1 is 0.72, 0.79, and 1 are observed, the absorptive core 2 has good adhesion to low-weight children.

Here, in the paper diaper 1 of this embodiment for low-weight children, the value of the product length L2 divided by the product length L1 is set to 0.7 or more and 1 or less (0.7 ≦ L2 / L1 ≦ 1).

This makes it difficult to fold the paper diaper 1 in half with the fold line FL at the time of packaging, and it is easy to maintain the state where the paper diaper 1 is unfolded in the longitudinal direction. Therefore, when the paper diaper 1 is installed, a caregiver or the like lays the paper diaper 1 under a low-weight child, passes the paper diaper 1 between the feet of a lying low-weight child, and releases the hand, which is likely to become a paper diaper. 1The state of spreading toward the long side. Therefore, it is easy to install the paper diaper 1 with the absorptive core 2 along the intercondylar part and the buttocks of a low-weight child. Therefore, even if the length W3 (refer to FIG. 1) of the sheet portion of the leg circumference is long, it is possible to suppress the absorptive core 2 from floating from the intercondylar portion and the buttocks of a low-weight child, and to allow the absorbent core 2 to prevent Improved fit.

In this way, the floating of the absorbent core 2 is suppressed, and the skin which does not pass urine to a low-weight child can be absorbed in the absorbent core 2. Therefore, it is possible to suppress the irritation of the skin of low-weight children due to excretion of urine.

In addition, the curved lying position peculiar to the low-weight child is aligned with the position of the base of the foot of the low-weight child at the position of the buttocks of the low-weight child estimated from the outside of the diaper 1. Therefore, as shown in FIG. 4C, when the absorptive core 2 floats from the buttocks of the low-weight child, the lifting of the foot of the low-weight child becomes insufficient. Therefore, the lifting of the absorbent core 2 can be suppressed, and the feet of a low-weight child can be pulled up to a proper position.

In addition, because it is easy to maintain the state of the diaper 1 deployed in the longitudinal direction, the diaper 1 can be smoothly passed through the diaper 1 between the feet of a low-lying child who is lying down during the installation of the diaper 1. good. In addition, a nurse or the like lays the diaper 1 under a low-weight child, or passes the diaper 1 between the feet of a lying low-weight child. After releasing the hand, the diaper 1 is not easily folded in half instantly. Therefore, it is possible to prevent the folded paper diaper 1 from irritating the skin of a low-weight child.

Table 2 shows the results of evaluating the fit of the absorbent core 2 to low-weight infants by changing the viewing height H2. Four types of samples 6 to 9 were made, and the viewing height H2 was measured. Then, the subjects actually mounted each sample 6 to 9 on a puppet imitating a low-weight child, and evaluated the fit.

The specifications of samples 6 to 9 are described below. The elongation ratio of the elastic member 9 for the three-dimensional hemming part is 1.99 times that of the sample 6, 2.17 times that of the sample 7, 2.10 times that of the sample 8, and 1.46 times that of the sample 9. In addition, the rigidity of the absorbent core 2 in the long-side direction is one in which samples 6 to 7 are high (hard) and samples 8 to 9 are low (soft). The product length L1 is 240mm for samples 6, 8, 175mm for sample 7, and 230mm for sample 9. In addition, all the samples 6 to 9 were prepared with leg circumference elastic members 10.

The evaluation of the adhesiveness was the same as the evaluation method of Table 1. That is, the subject performs two-stage evaluation by visually observing the puppets equipped with the samples 6 to 9 or touching the puppet's hips from the samples.

From the results in Table 2, it can be seen that in the samples 6 to 7 with viewing heights H2 of 81.7 mm and 70 mm, the adherence of the absorbent core 2 to low-weight children is not good. On the other hand, it can be seen that the samples 8 to 9 having a viewing height H2 of 51 mm and 45 mm have good adhesion of the absorptive core 2 to low-weight infants.

Here, in the paper diaper 1 for low-weight children, it is sufficient to set the viewing height H2 to less than 70 mm (H2 <70 mm). The low viewing height H2 means that it is not easy to fold the paper diaper 1 in half with the fold line FL during packaging. When the paper diaper 1 is installed, the absorbent core 2 is easy to install the paper diaper along the intercondylar portion and hip of the low-weight child 1. Therefore, the fit of the absorbent core 2 to a low-weight child can be improved.

Further, in the paper diaper 1 for a low-weight child, the expansion ratio of the elastic member 9 for the three-dimensional hem portion can be made smaller than the expansion ratio of the leg circumference elastic member 10.

The paper diaper 1 is in a natural state, and the side of the skin is bent inward by the contraction of the two elastic members 9 and 10. Compared with the leg circumference elastic member 10, the elastic member 9 for a three-dimensional hemming part located in the widthwise direction has a greater influence on the bending deformation of the paper diaper 1. Therefore, by setting the above-mentioned elongation ratio, the bending of the paper diaper 1 can be suppressed, and the folding line FL paper diaper 1 during packaging is not easily folded in half.

In addition, if the longitudinal rigidity of the absorbent core 2 is high, and the elongation ratio of the elastic member 9 for the three-dimensional hemming portion is high, the state shown in FIG. 7A is adopted. This makes the viewing height H2 higher. Therefore, as shown in the results of Tables 1 and 2, the rigidity of the absorptive core 2 in the longitudinal direction can be reduced, the absorptive core 2 can be made soft, and the elongation ratio of the elastic member 9 for the three-dimensional hemming portion can be reduced. In this way, increasing the value of the product length L2 divided by the product length L1 (L2 / L1) can reduce the viewing height H2 and make the diaper 1 difficult to fold in half.

Specifically, the expansion ratio of the elastic member 9 for a three-dimensional hemming portion may be set to 1.3 times or more and 2.1 times or less. When the elongation ratio is reduced to less than 2.1 times, the paper diaper 1 becomes difficult to fold in half. On the other hand, setting the elongation ratio to 1.3 times or more allows the three-dimensional hemming portion 8 to stand up and suppresses leakage of excrement.

Moreover, by setting the elongation ratio to 2.1 times or less, the standing of the three-dimensional hemming portion 8 can be appropriately suppressed. In this way, even if the paper diaper 1 is comfortably installed to such an extent that the three-dimensional hem portion 8 contacts the low-weight child, it is possible to prevent the absorbent core 2 from rising from the low-weight child.

The measurement of the elongation ratios of the elastic members 9 and 10 may be performed by a known method. For example, in the paper diaper 1 in the natural state, the length H0 in the long-side direction of the stretchable portion (the portion fixed to the sheet in the stretched state) of the elastic member to be measured is measured. Next, the paper diaper 1 was extended to the state of the longitudinal direction so that the wrinkle which generate | occur | produced in the paper diaper 1 could not be recognized visually, and the length H1 of the longitudinal direction of the expansion-contraction part of the elastic member was measured. Then, the length H1 divided by the length H0 is taken as the elongation ratio (elongation ratio = H1 / H0).

<<< Easing the fold line FL at the time of packaging >> FIG. 8A and FIG. 8C are explanatory drawings which imitate the behavior of a caregiver etc. and the following diaper 1. FIG. 8A and 8B are schematic perspective views of the paper diaper 1, and FIG. 8C is a schematic cross-sectional view of the paper diaper 1. FIGS. 9A and 9B are explanatory diagrams of other fold lines FLa formed on the paper diaper 1, and are schematic cross-sectional views of the paper diaper 1.

As described above, when the diaper 1 is easily folded in half with the folding line FL at the time of packaging, the absorbent core 2 easily rises from a low-weight child. In addition, even if the folding habit of the fold line FL at the time of packaging is strong, the absorbent core 2 easily rises from a low-weight child. If the folding habit is strong, as shown in the paper diaper 1 'of the comparative example of Fig. 4C, the fold line FL of the paper diaper 1 is folded at an acute angle and protrudes outward. Therefore, the absorbent core 2 does not easily float along the curved hips.

However, in a hospital or the like, a caregiver or the like takes out the paper diaper 1 for a low-weight child from a packaging bag, and then unfolds the paper diaper 1 in a long direction to confirm adhesion of garbage. In addition, the nurse or the like rubs the paper diaper 1 before the installation with hands to make the paper diaper 1 soft. At this time, the folding habit of the fold line FL at the time of packaging is eased.

In the paper diaper 1 according to the present embodiment, when a caregiver or the like rubs the paper diaper 1 or the like, the paper diaper 1 forms a fold line FLa other than the fold line FL at the time of packaging.

The following actions are performed on the diaper 1 by imitating the actions of a nurse or the like. First, as shown in FIG. 8A, the folded paper diaper 1 taken out of the packaging bag is extended in the longitudinal direction and stretched, and is pressed against the upper surface 30 a of the test stand 30. At this time, the non-skin side surface 1c of the diaper 1 is directed upward, and the skin side surface 1d is directed downward. Then, a board 31 covering the entire surface of the paper diaper 1 is placed on the paper diaper 1, and a weight 32 of 1 kg is placed on the board 31 and left for 2 minutes. Then, the weight 32 and the board 31 are removed, and the paper diaper 1 is brought into a natural state on the upper surface 30a of the test stand 30 (FIG. 8B and FIG. 8C).

In its natural state, as shown in FIG. 9A, the absorbent core 2 has a first region S1 along the upper surface 30 a of the test bed 30 and a second region S2 that is spaced upward from the upper surface 30 a of the test bed 30. . Further, in the paper diaper 1, another polyline FLa is formed so as to form a boundary between the first region S1 and the second region S2. The other folding line FLa is a folding line that folds the absorbent core 2 in the wide-side direction in the same manner as the folding line FL during packaging.

In addition, the absorptive core 2 is along the upper surface 30a of the test stand 30, and refers to the case where the so-called absorptive core 2 contacts the upper surface 30a of the test stand 30 via the top sheet 3 or the like. Therefore, when the paper diaper stands up at an acute angle by folding the folding line FL at the time of packaging, that is, only in the area where the absorbent core 2 exists, and the borders of the sheet portions 3, 4, and 5 further outside in the long side direction are formed. Not included if there are other polylines.

The paper diaper 1 on which the fold line FL and other fold lines FLa at the time of packaging are formed is mounted on a low-weight child, and the absorbent core 2 is folded along the broad side direction with a plurality of fold lines FL and FLa. In other words, the absorptive core 2 is bent at a plurality of different positions in the longitudinal direction. Therefore, the paper diaper 1 'of the comparative example as shown in FIG. 4C can prevent the fold line FL from protruding only when it is packed, and the absorbent core 2 can be bent along the curved hips. Therefore, the fit of the absorbent core 2 to a low-weight child can be improved.

By improving the conformability of the absorbent core 2, the excretion of urine does not reach the skin of the low-weight child, and the irritation of the skin of the low-weight child can be suppressed. In addition, when performing a posture specific to a low-weight child, align the position of the root of the foot with the correct hip position of the low-weight child and pull the foot to an appropriate position.

Taken together, the paper diaper 1 of this embodiment has an absorptive core 2 having a narrow portion 2A, and the length W3 (see FIG. 1) of the sheet portion around the legs is long. When a low-weight child is stomping, the absorptive core 2 is formed. Floating concerns. However, since the other fold line FLa is formed in the paper diaper 1, the absorptive core 2 can easily follow the buttocks of a low-weight child, and the absorptive core 2 can be suppressed from floating from a low-weight child.

As shown in FIG. 9A, after the diaper 1 after imitating the behavior of a nurse or the like (FIG. 8A), other fold lines FLa may be formed on both sides of the mountain folded by the fold line FL during packaging. In addition, as shown in FIG. 9B, the mountain bent by the folding line FL at the time of packaging is inclined toward one side, and the absorptive core 2 on the side opposite to the side inclined by the mountain is moved away from the upper surface 30a of the test stand 30, or may On the side of the mountain slope, another polyline FLa is formed.

However, as shown in FIG. 9A, it is preferable that other polylines FLa are formed at two places. The absorptive core 2 has a lot of bending starting points, so the absorptive core 2 is easier to follow the hip with a curve, and the fit of the absorptive core 2 to a low-weight child is improved.

Further, another method of forming the folded line FLa in the paper diaper 1 may reduce the rigidity of the absorbent core 2 and make the absorbent core 2 soft. Specifically, the rigidity in the long-side direction and the wide-side direction of the absorbent core 2 may be set to 1.1 N or less. In this way, it is easy to form another fold line FLa in the paper diaper 1.

Table 3 shows the change in the rigidity of the wide diaper 1 of the paper diaper 1 to evaluate the ease of lifting of the feet of a low-weight child. Four types of samples 10 to 13 were made, and the central portion in the longitudinal direction of the paper diaper 1 was measured, that is, the rigidity in the widthwise direction of the region across the fold line FL at the time of packaging was measured. In addition, the subjects actually mounted each of the samples 10 to 13 on a puppet imitating a low-weight child, and evaluated the ease of lifting when lifting the puppet's feet.

The specifications of samples 10 to 13 are described below. The absorptive core of Sample 10 is a laminate of two layers of air-formed sheets, and has a width of 25 mm. The absorptive core of Sample 11 is a laminate of two layers of air-formed sheets, and has a width of 40 mm. The absorptive core of Sample 12 was a single layer of air-formed sheet, and the width was 35 mm. The absorptive core of Sample 13 was a laminate of pulp fibers and had a width of 35 mm.

The testees evaluated the ease of lifting the feet in three stages. Specifically, the sample that felt "the feet of the doll are not easy to lift and exert a strong force on the doll from the paper diaper" was evaluated as "×", and the feeling of "easy to lift the feet of the doll was not found. The sample of the diaper which exerts a strong force on the puppet was evaluated as "○", and the sample that felt "easy to lift the feet of the puppet and hardly exerted force on the puppet from the diaper" was evaluated as "◎".

From the results in Table 3, it can be seen that samples 10 to 11 having a rigidity of 1.145N and 1.103 in the broad side direction are difficult to lift the feet of the doll. On the other hand, it can be seen that the sample 12 having a rigidity of 0.861N in the wide side direction is prone to lift the feet of the doll. In addition, it can be seen that the sample 13 having a rigidity of 0.298N in the wide side direction is very easy to lift the feet of the doll.

Here, the rigidity of the width direction of the absorptive core 2 in the area including the folding line FL at the time of packaging may be set to 1.1 N or less. In this way, when the feet of the low-weight child with the paper diaper 1 installed are lifted, it is possible to suppress the situation where the absorbent core 2 with high rigidity presses the skin of the low-weight child. At the same time, in the paper diaper 1 provided with the absorbent core 2 having low rigidity, it is easy to form a fold line FLa other than the fold line at the time of packaging. Therefore, it is easier for the absorptive core 2 to follow the curved hips, and the fit of the absorptive core 2 to a low-weight child is improved.

The rigidity of the absorbent core 2 may be measured by a known method, and the following methods can be exemplified. First, the side of the absorptive core 2 in the wide-side direction is folded in a state in which the paper diaper 1 is expanded and extended in the long-side direction. Furthermore, the side end part of the absorptive core 2 was extended from the test stand. Moreover, the terminal of the digital lateral force meter is provided so that it may contact the center part of the longitudinal direction of the side end of the absorptive core 2 (namely, the area | region which crosses the folding line FL at the time of packaging). Then, the terminal of the digital lateral force meter was moved toward the inside of the widthwise direction of the paper diaper 1 by about 5 mm. The maximum value (compressive force) when the terminal is pushed into the absorbent core 2 is set as the rigidity value of the absorbent core 2 in the width direction.

The density of the absorbent core 2 may be less than 0.0155 g / cm ³ . As a result, the absorbent core 2 becomes soft. Therefore, the nurse or the like rubs the paper diaper 1 to easily form another fold line FLa on the paper diaper 1 (absorptive core 2), so that the absorbent core 2 can easily follow the curved hips.

In particular, the density of the center CL in the longitudinal direction of the absorptive core 2, that is, the density of the portion of the absorptive core 2 where the fold line FL at the time of packaging is formed may be less than 0.0155 g / cm ³ . As a result, the folding habit of the fold line FL at the time of packaging cannot easily adhere to the absorbent core 2. In addition, a nurse or the like rubs the paper diaper 1 to ease the folding habit. Therefore, the fold line FL at the time of packaging such as the paper diaper 1 'of the comparative example of FIG. 4C can be prevented from protruding, and the absorptive core 2 can be made to follow the hip which has a curve easily.

The measurement of the density of the absorptive core 2 should just be performed by a well-known method. For example, the measurement target portion is cut out from the absorbent core 2 and the basis weight (g / cm ² ) and the thickness (cm) are measured. The basis weight (g / cm ² ) is divided by the thickness (cm) to calculate the density (g / cm ³ ). The thickness measurement is an example. For example, a method such as using a dial thickness gauge ID-C1012C made by Mitutoyo Corporation or the equivalent, and setting the contact pressure to 3gf / cm ² to pressurize the target part to measure is performed. .

Although described in detail later, the absorptive core 2 is provided with a plurality of bending induction portions 21a to 21c at different positions in the longitudinal direction, and the absorptive core 2 is induced to bend in the wide-side direction. A pair of notches 2a to 22c).

Therefore, the nurse or the like rubs the paper diaper 1 or the like, easily bends the absorbent core 2 at the bending induction portions 21a to 21c, and easily forms the fold line FLa other than the fold line FL when the paper diaper 1 is packed. Therefore, the absorptive core 2 is easy to follow a hip which has a curve.

Furthermore, suppose that when a nurse or the like rubs the paper diaper 1 or the like, the samples 6 to 9 of Table 2 are placed on the paper diaper 1 in the same manner as described above, and the viewing height H3 after the measurement is measured. Then, the subjects actually mounted each sample 6 to 9 on a puppet imitating a low-weight child, and evaluated the fit.

The evaluation of the fit is a two-stage evaluation performed by the test subject by visually observing the puppets installed with each of the samples 6-9, or touching the hips of the puppets from the samples. However, the evaluation of the viewing height H3 after placing the weight 32 (adhesion evaluation 2 in Table 2), if the paper diaper 1 is kneaded and installed, the tester will perform the evaluation of the viewing height H2 more strictly (Table Evaluation of adhesion of 2) 1).

From the results in Table 2, in all the samples 6 to 9, the viewing height H3 after placing the weight 32 was smaller than the viewing height H2. That is, if the folding habit of the fold line FL at the time of packaging is relaxed, it can be seen that the diaper 1 becomes difficult to fold in half.

In addition, from the results in Table 2, it can be seen that in samples 6 to 7 with viewing heights H3 of 73 mm and 62 mm, the absorptive core 2 has poor adhesion to low-weight children. On the other hand, it can be seen that the samples 8 to 9 having a height H3 of 48 mm and 25 mm have a good adhesion of the absorbent core 2 to low-weight infants.

Here, in the paper diaper 1 for a low-weight child, the folded paper diaper 1 is extended and extended in a long side direction, and the skin side is pressed down on the upper surface of the table, and the board 31 and the weight 32 are placed on After being left on the diaper 1 for 2 minutes, the viewing height H3 in the natural state may be 60 mm or less (H3 ≦ 60 mm).

In this way, even a nurse or the like who takes measures to knead the paper diaper 1 before installation can recognize that the absorptive core 2 has good adhesion to low-weight children, and can attach the paper diaper 1 Sexual satisfaction and use.

<<< Shape of Absorptive Core 2 >> The paper diaper 1 for low birth weight children has the following characteristics. However, the absorptive core 2 is not limited to the one described below as long as it includes the narrow portion 2A.

As shown in FIG. 5, the length L5 from the center CL of the absorbent core 2 to one end 2A1 of the narrow portion 2A (the end 2A1 on the non-belt side opposite to the hook-and-loop tape 7 side) in the longitudinal direction is the absorbent core A length of 22% or more of the length L4 in the longitudinal direction of 2 is sufficient (L5 ≧ L4 × 0.22).

In the longitudinal direction, the narrowed portion 2A may extend to the outside in the longitudinal direction from the center CL of the absorptive core 2 and the center CL2 of one end 2b of the non-strip side of the absorptive core 2.

In this way, as shown in FIG. 3A, when the second waistline portion 1C on the non-belt side is installed so as to cover the ventral side, the low weight is easily pulled up by the narrow portion 2A extending toward the non-belt side. Children's feet. In other words, the narrowed portion 2A is formed in the intercondylar portion of a low-weight child whose foot is pulled toward the non-belt side. Therefore, when the feet of the low-weight child are lifted, it is possible to suppress the skin of the low-weight child from being pressed by the rigid absorbent core 2. Assuming that the length L5 is less than 22% of the length L4, the narrow part 2A cannot be translocated in the intercondylar part of a low-weight child who has raised his or her feet.

Similarly, the length L6 from the center CL of the absorptive core 2 to the other end 2A2 of the narrow portion 2A (which is the end 2A2 on the side of the strap on the side of the hook-and-loop fastener 7) is the lengthwise direction of the absorptive core 2. A length of 22% or more of the length L4 is sufficient (L6 ≧ L4 × 0.22).

In the longitudinal direction, the narrowed portion 2A may extend to the outside in the longitudinal direction from the center CL of the absorptive core 2 and the center CL3 of the other end 2c on the strip side of the absorptive core 2.

In this way, as shown in FIG. 3B, even if the first waistline portion 1A on the belt side is installed upside down to cover the ventral side, the narrow portion 2A extending toward the belt side is easily pulled up. Feet of low birth weight infants. In other words, the narrow part 2A is formed in the intercondylar part of a low-weight child who pulls his foot toward the belt side. Therefore, when the feet of the low-weight child are lifted, it is possible to suppress the skin of the low-weight child from being pressed by the rigid absorbent core 2. Assuming that the length L6 is less than 22% of the length L4, the narrow part 2A cannot be translocated in the intercondylar part of a low-weight child who has raised his or her feet.

Further, as shown in FIG. 5, both side ends 2 a in the wide-side direction of the narrow portion 2A may have a straight portion 2A 3 along the long-side direction. At this time, for example, the width of the absorptive core 2 can be narrowed over a wider range in the long-side direction than when the side ends of the absorptive core 2 have an arc shape convex toward the inside in the wide-side direction. Specifically, the width of the absorptive core 2 can be set to 15 mm or more and 45 mm or less, not only at the center CL in the longitudinal direction of the absorptive core 2 but also at the straight portion 2A3. Therefore, it is easy to pull up the feet of a low-weight child. In addition, when the feet of a low-weight child are lifted, it is possible to suppress the pressure on the skin of the low-weight child with the absorbent core 2.

The absorptive core 2 of this embodiment is provided with straight portions 2A3 on both sides in the longitudinal direction with respect to the center CL in the longitudinal direction. Therefore, even when the paper diaper 1 is usually installed, it is easy to pull up the feet of a low-weight child when installed backwards.

In addition, by growing the narrowed portion 2A, the indicator 12 that changes color due to urination may be collected in the narrowed portion 2A. In the narrow portion 2A, the indicator portion 12 easily reacts. Therefore, even if the low-weight child has a small amount of urine, the indicator portion 12 can be made to react, and it is easy to know the replacement time of the paper diaper 1.

Further, in the narrow portion 2A, the length W3 of the sheet portion from the side end of the absorbent core 2 in the wide side direction to the side end of the paper diaper 1 is long (see FIG. 1), and the three-dimensional hem portion 8 can be secured. Standing height. Here, as shown in FIGS. 1 and 5, the length L9 of the expansion and contraction portion of the elastic member 9 for the three-dimensional hem portion in a state where the diaper 1 is extended and extended in the longitudinal direction is longer than the length of the narrow portion 2A. The length L10 in the lateral direction is sufficient (L9 <L10).

In this way, the narrow part 2A can be arranged across the long range of the expansion and contraction part of the elastic member 9 for the three-dimensional hemming part, and the three-dimensional hemming part 8 can be surely stood up. Therefore, excretory fluid can be blocked in the three-dimensional hemming portion 8.

However, the length of the narrowed portion 2A can be set to the following in a state diagram state (FIG. 1) in which the paper diaper 1 is stretched and extended in the longitudinal direction. In the longitudinal direction, the length L7 from the end 1a on the non-strip side (the other side) of the diaper 1 to the end 2A1 on the non-strip side of the narrow portion 2A is the end from the strip side (one side) of the diaper 1 The length from 1b to the non-belt-side end 7a of the hook-and-loop fastener 7 is greater than or equal to L8 (L7 ≧ L8).

Generally, when the paper diaper 1 is installed, the approximate locking position of the end 7a of the hook and loop tape 7 in the second waistline portion 1C is from the end 1a on the non-tape side of the paper diaper 1 to the center CL side in the longitudinal direction. A position p1 away from the length L8 (see FIGS. 1 and 3C). The foot of the low-weight child is not pulled up to the locking position p1 of the hook and loop fastener 7 and is located outside in the longitudinal direction. Therefore, the end 2A1 of the narrow portion 2A may be disposed on the center CL side in the longitudinal direction more than the position p1. In this way, the narrow portion 2A is not increased unnecessarily, and the absorption capacity of the absorbent core 2 can be secured.

As shown in FIG. 5, in the narrow portion 2A, the first bend inducing portion 21 a and the second bend inducing portion are arranged in a line in the longitudinal direction to align the absorptive core 2 in a curved direction. 21b and the third bending induction portion 21c.

In detail, the 2nd bending induction part 21b is arrange | positioned in the center part of the narrow part 2A in the longitudinal direction. The 1st bending induction part 21a is arrange | positioned on the strip side (one side) of a longitudinal direction rather than the 2nd bending induction part 21b. The 3rd bending induction part 21c is arrange | positioned on the non-belt side (the other side) of a longitudinal direction rather than the 2nd bending induction part 21b.

In the absorptive core 2 of this embodiment, in the first to third bending induction portions 21a to 21c, one of the two sides of the narrow portion 2A in the wide-side direction is provided with a convex portion formed inward in the wide-side direction. The pair of notches 22a to 22c. The pair of cutout portions 22a to 22c are symmetrically arranged with respect to a center line (not shown) that divides the absorbent core 2 in the broad side direction, and are arranged symmetrically. In addition, the cutout portions 22a to 22c are not limited to the mountain shape shown in FIG. 5, and may be, for example, rectangular or tangent.

In the cutout portions 22 a to 22 c, the basis weight (g / cm ² ) of a member (liquid-absorbent fiber or the like) constituting the absorbent core 2 is lower than that of the surrounding area, or a member constituting the absorbent core 2 does not exist. Therefore, at the portion where the absorptive core 2 of the pair of notches 22a to 22c is provided, the absorptive core 2 is easily bent in the broad direction due to the poor rigidity with the surrounding area.

As shown in FIG. 3C, the intercondylar portion of the low-weight child with the raised leg abuts on a portion offset to one side from the central portion in the longitudinal direction of the paper diaper 1. Therefore, with respect to a low-weight child who lays on his back with his feet raised, the starting point (F1) of the diaper 1 can be raised from the position where the buttocks touch the floor. Further, at the position (F2) at which the root on the ventral side of the foot is pulled up, there may be a bending start point of the diaper 1. In this way, the portion (F1 to F2) of the paper diaper 1 that abuts the intersacral part of a low-weight child becomes the bottom, and the paper diaper 1 is easily three-dimensionally deformed. Therefore, the paper diaper 1 is easy to follow the low-weight child who pulls up a leg, and it improves adhesiveness.

A portion between the second bend induction portion 21b and the third bend induction portion 21c is adhered to the intercondylar portion of a low-weight child in which the diaper 1 is usually installed. In addition, the second bending inducing portion 21b and the third bending inducing portion 21c are bent along the low-weight child who pulls the foot toward the non-belt side to deform the diaper 1 three-dimensionally and fit the body of the low-weight child. .

Similarly, the inter-condylar portion of a low-weight child with the paper diaper 1 installed on the front and back, and the portions between the first bend induction portion 21a and the second bend induction portion 21b are bonded together. In addition, the first bending inducing portion 21a and the second bending inducing portion 21b are bent along the low-weight child who pulls up the foot toward the belt side, so that the diaper 1 is three-dimensionally deformed and fits the body of the low-weight child.

In this manner, the bending induction portions 21a to 21c are provided at three places in the longitudinal direction of the absorbent core 2. When the paper diaper 1 is normally installed, and when it is installed upside down, it is also suitable for taking a posture unique to a low-weight child. The body of a low birth weight infant.

In addition, the absorbent core 2 has a plurality of bend inducing portions 21a to 21c and a plurality of bend starting points, and can ease the folding of the fold line FL of the paper diaper 1 during packaging. Therefore, as shown in the paper diaper 1 'of the comparative example of FIG. 4C, the fold line FL at the time of packaging of the paper diaper 1 can be prevented from protruding to the outside, and the paper diaper 1 can be easily bent along the intercondylar portion and the buttocks of a low-weight child. Therefore, it is possible to further suppress the absorptive core from floating from the intercondylar part and the buttocks of a low-weight child.

The absorptive core 2 according to the present embodiment has the first bend induction portion 21a and the third bend induction portion 21c at the ends in the longitudinal direction of the narrow portion 2A, that is, is disposed on the absorbent core. 2 where the width starts to narrow. Therefore, the notch portion 22a of the first bend induction portion 21a and a part of the notch portion 22c of the third bend induction portion 21c are formed by the outline line 2A4 inclined toward the inner side in the width direction of the narrow portion 2A.

Therefore, the paper diaper 1 can be bent at the root of the foot (F2 in FIG. 3C) on the ventral side of the pulled up foot, and the paper diaper 1 can be fitted to the body of a low-weight child. In addition, the inclination of the outline line 2A4 inclined toward the inner side in the width direction of the narrow portion 2A can be made steeper. In addition, in a wider range in the longitudinal direction, the width of the absorbent core 2 can be narrowed, and the feet of a low-weight child can be easily pulled up. In addition, when the feet of a low-weight child are lifted, it is possible to suppress the pressure on the skin of the low-weight child with the absorbent core 2.

The first to third bending induction portions 21a to 21c are not limited to the cutout portions 22a to 22c. For example, in the manufacturing process, a bending process of bending the absorptive core 2 in the broad side direction may be applied, or the basis weight of the members constituting the absorptive core 2 may be reduced in the broad side direction, or The first to third bending induction portions 21a to 21c are formed so that a slit in the wide side direction is formed in the central portion in the wide side direction.

As described above, the absorptive core 2 of this embodiment has a symmetrical shape with respect to the center CL in the longitudinal direction. Therefore, a bending induction portion (21a, 21c) or a straight portion 2A3 of the absorptive core 2 is provided on both sides in the longitudinal direction with respect to the center CL of the absorptive core 2 in the long-side direction. Therefore, the paper diaper 1 can be installed normally, and it can also be installed upside down, and the same effect can be acquired in any installation.

Although the embodiments of the present invention have been described above, the embodiments described above are intended to facilitate the understanding of the present invention, and are not intended to limit the interpretation of the present invention. In addition, the present invention can be changed and improved as long as it does not deviate from the gist thereof, and it goes without saying that the present invention also includes equivalents thereof.

1‧‧‧diapers (disposable disposable diapers for low weight infants)

1A‧‧‧The first waistline

1B‧‧‧ 胯 Lower

1C‧‧‧The second waist

1a, 1b ‧‧‧ both ends of the long side of the diaper

1c‧‧‧Non-skin side

1d‧‧‧Skin side

1e‧‧‧ Vertex

2‧‧‧ Absorbent core

2A‧‧‧Narrow part

2A3‧‧‧Straight line

21a‧‧‧1st bend induction unit

21b‧‧‧ 2nd bending induction unit

21c‧‧‧3rd bend induction unit

22a ～ 22c‧‧‧Notch

3‧‧‧ top sheet

4‧‧‧Leak-proof sheet

5‧‧‧ Exterior sheet

6‧‧‧ side sheet

7‧‧‧ Velcro

8‧‧‧Three-dimensional hem

9‧‧‧ Elastic member for three-dimensional hem

10‧‧‧ Leg circumference elastic member

11‧‧‧ cut line

12‧‧‧ Instruction

30‧‧‧test bench (set)

30a‧‧‧above

31‧‧‧board

32‧‧‧ weight

FL‧‧‧ Polyline

L1‧‧‧Product length

L2‧‧‧Watch Product Manager

H2, H3‧‧‧‧viewing height

S1‧‧‧Area 1

S2‧‧‧Zone 2

FLa‧‧‧ Other Polylines

M1, M2 ‧‧‧mark

[Fig. 1] A plan view of the paper diaper 1 stretched and extended in the longitudinal direction viewed from the skin side. [FIG. 2] FIG. 2A is a schematic cross-sectional view of the first waistline portion 1A, and FIG. 2B is a schematic cross-sectional view of the lower portion 1B. [Fig. 3] Figs. 3A to 3C are explanatory diagrams of an installed state of the paper diaper 1. [Fig. [Fig. 4] Figs. 4A and 4B are explanatory diagrams of a packaging method of the paper diaper 1, and Fig. 4C is an explanatory diagram of an installation state of the paper diaper 1 'of a comparative example. [Fig. 5] is a plan view of the absorbent core 2. [Fig. 6] Figs. 6A and 6B are explanatory diagrams of the product length L1. [Fig. 7] Figs. 7A and 7B are explanatory diagrams of the viewing product length L2 and the viewing height H2. [FIG. 8] FIGS. 8A and 8B are explanatory diagrams of the behavior of imitating the behavior of a nurse or the like and the subsequent diaper 1. [FIG. [FIG. 9] FIGS. 9A and 9B are explanatory diagrams of other fold lines FLa formed in the paper diaper 1. As shown in FIG.

Claims (14)

A disposable diaper for low-weight infants, having a long side direction and a wide side direction, and having an absorbent core. The central part in the long side direction has a narrower width than the ends. The width of the center of the absorptive core in the long-side direction is 15 mm or more and 45 mm or less. In the packaging state, disposable paper for low-weight children that is folded in half according to the fold line along the wide-side direction. A diaper is characterized in that: The previously-used disposable diaper is folded in the state of being extended and extended in the direction of the long side, and the side of the skin is pressed down on the table to cover the aforementioned disposable. A full-size board of a paper diaper is placed on the disposable diaper, and a weight of 1 kg is placed on the board and left for 2 minutes, and then the weight and the board are removed and placed on the board. When the upper surface is in a natural state, the absorbent core has a first region along the upper surface and a second region distant from the upper surface upward; There are other fold line to be a boundary of the first region and the second region. The disposable diaper for low weight infants according to item 1 of the scope of patent application, wherein the other fold lines are formed on both sides of the fold line in the long-side direction. The disposable diaper for low-weight infants according to item 1 or item 2 of the scope of patent application, wherein the rigidity in the widthwise direction of the absorptive core 2 in the region including the fold line is 1.1 N or less . The disposable diaper for low weight infants according to any one of claims 1 to 3, wherein the density of the absorbent core is less than 0.0155 g / cm ³ . The disposable diaper for low weight infants according to any one of claims 1 to 4, wherein: after the disposable diaper is unfolded and extended in the direction of the long side, In a natural state where the skin is placed on the upper surface of the table with the side of the skin facing down, the height of the disposable diaper in a direction perpendicular to the upper surface is less than 70 mm. The disposable paper diaper for a low-weight child as described in any one of claims 1 to 5, wherein: the previously-used disposable paper diaper which is folded in half is opened toward the aforementioned long side and In the stretched state, after pressing the skin side down on the table, place a full-size board covering the disposable diaper on the disposable diaper, and put a 1kg weight on it. After placing the code on the board for 2 minutes, remove the weight and the board to make it natural on the upper surface, and the height of the disposable diaper perpendicular to the upper surface. Below 60mm. The disposable paper diaper for low-weight infants as described in any one of claims 1 to 6, wherein extends from the center of the absorbent core to one end of the narrow portion in the long-side direction. The length of the length is 22% or more of the length in the longitudinal direction of the absorbent core. The disposable diaper for low birth weight infants according to item 7 of the scope of patent application, wherein the length from the center of the absorptive core to the other end of the narrow portion in the longitudinal direction is the absorbent A length of 22% or more of the length in the longitudinal direction of the core. The disposable paper diaper for a low-weight child according to any one of claims 1 to 8, wherein both ends of the narrow side in the wide side direction have a direction along the long side. Straight section. The disposable diaper for low-weight infants according to any one of claims 1 to 9 in the patent application scope, wherein the cymbal has both outer sides from the waist portion on one side in the long side direction to the outer side in the wide side direction. The extended pair of hook-and-loop fasteners, in a state where the disposable diaper is unfolded and extended in the direction of the long side, from the other side in the longitudinal direction of the disposable diaper, The length in the long-side direction from the end in the long-side direction to the other side in the long-side direction of the narrow portion is from the one-side end in the long-side direction of the disposable diaper to the hook-and-loop fastener. The length on the other side of the long-side direction is greater than the length in the long-side direction. The disposable paper diaper for a low-weight child as described in any one of claims 1 to 10, wherein the absorbent core is bent in the narrow part and bent along the broad side The first bend induction portion, the second bend induction portion, and the third bend induction portion to be induced are arranged in an array in the longitudinal direction. The disposable diaper for low-weight infants according to item 11 of the scope of patent application, wherein the first bend induction portion is disposed on one side of the long side direction than the second bend induction portion. The third bend induction portion is disposed on the other side of the long-side direction than the second bend induction portion, and at least one of the first bend induction portion and the third bend induction portion is in the foregoing The narrow portion is arranged at a portion where the width of the absorbent core starts to narrow. The disposable diaper for low-weight infants according to any one of claims 1 to 12, wherein the absorbent core has a symmetrical shape in the longitudinal direction. The disposable paper diaper for low-weight infants according to any one of claims 1 to 13, wherein the is disposed on both sides of the wide edge direction of the disposable paper diaper. There are a pair of three-dimensional hem portions. The three-dimensional hem portion can stand up to the skin side by the elastic member for three-dimensional hem portion that expands and contracts in the long side direction. Compared to the use of the disposable diaper, The length of the elastic portion of the elastic member for three-dimensional hemming portion in a state of being stretched and extended in the longitudinal direction is longer in the longitudinal direction of the narrow portion.