TW201607519A - Disposable diaper - Google Patents

Abstract

A disposable diaper for children with body weights of 3000 g or less, the disposable diaper comprising: side flaps; a pair of fastening tapes provided on the side flaps; and a target region capable of fastening to the fastening tapes. The pair of fastening tapes can be fastened by overlaying one of the fastening tapes on the other fastening tape. If the fastening force between the target region and one of the fastening tapes is P1 and the fastening force between the one fastening tape and the other fastening tape is P2, the relationship P1 > P2 > 0.1 N/10 mm holds. When the paired fastening tapes are overlaid with the centers of the fastening tapes in the tape width direction aligned, the upper fastening tape can fasten to the target region at the two sides that straddle the end of the lower fastening tape in the tape width direction.

Description

Disposable diapers

The present invention relates to a disposable diaper.

In the past, unfolded disposable diapers have been widely used. In the unfolded disposable diaper, a Velcro strip is disposed on the side flap, and a affixed strip that is engaged with the adhesive strip is disposed on the front portion (the ventral portion, also referred to as the front waist portion). Such an unfolded disposable diaper is particularly widely used in newborns and infants in view of ease of handling and the like.

[Previous Technical Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2013-212212

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2013-138702

[Patent Document 3] Japanese Laid-Open Patent Publication No. 2013-230256

[Patent Document 4] Japanese Laid-Open Patent Publication No. 2013-158573

[Patent Document 5] International Patent Publication No. 2013/077360

In the case of an infant weighing less than 3,000 g (hereinafter referred to as a low-weight child), it is considered from the viewpoint of minimizing the treatment, and there is a case where it is required to avoid touching the baby as much as possible. Therefore, for the adhesive tape of the disposable diaper used for low-weight children, "easy to remove" is required.

On the other hand, especially in the case of low birth weight children, it is necessary not only to prevent leakage of excrement, but also to prevent the falling adhesive tape from coming into contact with the baby, and suppressing stress such as discomfort or pain. Therefore, the adhesive tape of the disposable diaper used for low-weight children is also required to be "not easy to fall off".

In this way, the adhesive tape of the disposable diaper used in low-weight children is required to be both positive and negative ("easy to remove" and "not easy to fall off").

The present invention aims to achieve the coexistence of the positive and negative functions of the fastening tape.

The main invention for achieving the above object is a disposable diaper for use in an infant weighing less than 3,000 g, characterized in that it is provided with: a side flap, a pair of gussets disposed on the side flap, and a viscous bond The buckled area of the buckle is overlapped by the adhesive tape on one side of the pair of fastening tapes on the other side When the fastening tape is engaged and the engaging force of the above-mentioned adhesive labeling area and the one of the above-mentioned fastening tapes is P1, and the engaging force of the one of the fastening tapes and the other fastening tape is P2 In the state where P1>P2>0.1N/10 mm, and the center of the width direction of the fastening tape is aligned, when the pair of fastening tapes are overlapped, the upper fastening tape may be facing the above The direction of the bandwidth spans both sides of the end of the lower end of the fastening tape, and is engaged with the above-mentioned area to be adhered.

Other features of the present invention will be apparent from the description of the specification and the accompanying drawings.

According to the present invention, it is possible to achieve the coexistence of the positive and negative functions of the fastening tape ("easy to remove" and "not easy to fall off").

1‧‧‧ disposable diapers

3‧‧‧ front

5‧‧‧ lower hip

7‧‧‧ Rear

12‧‧‧Central strip area

14‧‧‧Flanking

15‧‧‧Thigh hem

16‧‧‧Thigh side hem

18‧‧‧ Waist hem

21‧‧‧Acceptor

22‧‧‧Surface

23‧‧‧ leakproof sheets

24‧‧‧Back sheet (outer sheet)

25‧‧‧Flex film

26‧‧‧ Skin side sheet

26A‧‧‧Interface

27‧‧‧Flexible components

28‧‧‧Waist ruffle film

29‧‧‧Buckled belt

30‧‧‧Buckle belt

32‧‧‧Substrate sheet

34‧‧‧ hook sheet

36‧‧‧Buckled sheets

A‧‧‧ base area

B‧‧‧Intermediate area

C‧‧‧Hook sheet area (engagement area)

D‧‧‧ front end area

[Fig. 1] Fig. 1 is a plan view showing the disposable disposable diaper 1 used for low-weight children.

[Fig. 2] Fig. 2A to Fig. 2C are exploded explanatory views of the respective portions of the disposable diaper 1 used for low birth weight infants. Fig. 2A is an exploded explanatory view of the front portion 3. Fig. 2B is an exploded view of the lower portion 5 of the buttocks. Fig. 2C is an exploded explanatory view of the rear portion 7.

[Fig. 3] Figs. 3A and 3B, showing the buckle of the present embodiment An illustration of the belt 30.

[Fig. 4] Fig. 4A is an explanatory view showing a state in which the other fastening tape 30 is superposed on one of the fastening tapes 30. Fig. 4B is a comparative explanatory view of a case where one pair of the fastening tapes 30 are fixed to each other.

[Fig. 5] Fig. 5 is an explanatory diagram of measurement of the engagement force.

[Fig. 6] Fig. 6A is an explanatory view showing a case where the lower side of the fastening tape 30 is fixedly adhered to the tape 29 to be adhered. Fig. 6B is an explanatory view showing the attachment of the other fastening tape 30 to the fastening tape 30 of Fig. 6A.

[Fig. 7] Figs. 7A and 7B are explanatory views of the shape of the fastening tape 30 of the comparative example.

[Fig. 8] Figs. 8A and 8B are explanatory views of a first modification of the shape of the fastening tape 30.

[Fig. 9] Figs. 9A and 9B are explanatory views of a second modification of the shape of the fastening tape 30.

[Fig. 10] Fig. 10 is an explanatory view of the pattern of the tape 29 to be affixed, and the pattern of the affixed sheet 36 of the fastening tape 30.

[Fig. 11] Fig. 11 is an explanatory view of a guide pattern formed on the tape 29 to be adhered.

[Fig. 12] Fig. 12 is an explanatory diagram of a posture.

[Fig. 13] Figs. 13A and 13B are explanatory diagrams showing the positional relationship of the foot and the fastening tape.

[Formation for carrying out the invention]

At least the following matters will be apparent from the description of the patent specification and the accompanying drawings.

A disposable diaper for use in an infant having a weight of 3000 g or less, characterized in that: a side flap, a pair of gusset strips disposed on the side flaps, and a shackle that can be engaged with the sling strip In the target area, the adhesive tape on one side of the pair of fastening tapes is overlapped and the other fastening tape is engaged, and the engaging force of the above-mentioned adhesive labeling area and the one of the above-mentioned one fastening tapes is taken as P1. When the engagement force of the one of the above-mentioned fastening tapes and the other of the above-mentioned fastening tapes is P2, the relationship is P1>P2>0.1N/10 mm, and the center of the above-mentioned fastening tape in the width direction is matched. When the pair of fastening tapes are overlapped, the upper fastening tape can be engaged with the adhesive-bonded area at both sides of the end of the lower fastening tape in the direction of the bandwidth.

According to the disposable diaper, the positive and negative functions of the fastening tape ("easy to remove" and "not easy to fall off" can be achieved.

The fastening tape includes an engagement region that engages with the region of the adhesive label, such that an end portion of the upper fastening tape is fitted to the side of the engagement region of the lower fastening tape When the pair of fastening tapes are overlapped in a state in which the center of the end portion of the fastening tape is aligned in the state in which the end portions are aligned, the upper fastening tape crosses in the direction of the bandwidth. It is preferable that the side of the end of the side of the adhesive tape can be engaged with the above-mentioned area to be adhered. According to the disposable diaper used in this way, the front and back functions of the fastening tape can be sought ("easy to remove" and "Could not fall off" coexist.

The fastening tape is provided with an engagement region that is engaged with the region of the adhesive label, and the width of the end portion of the side of the engagement region is larger than the width of the end portion of the fastening tape More ideal. Thereby, when the pair of fastening tapes are overlapped, the upper fastening tape can be engaged with the above-mentioned adhered area at both ends of the end portion of the lower fastening tape in the direction of the bandwidth.

The fastening tape is provided with a affixed sheet which can be engaged with the other fastening tape, and a common pattern is preferably applied to the surface of the affixed label and the surface of the affixed sheet. Thereby, the textures of the two members are common, more beautiful, and the pattern pairs of the two members can be naturally guided and engaged.

A stripe pattern composed of concavities and convexities is applied to the surface of the label to be bonded and the surface of the sheet to be adhered, and the unevenness is preferably arranged alternately along the belt length direction of the fastening tape. Thereby, it is easy to bend the fastening tape toward the belt length, and it is not easy to bend in the direction of the bandwidth.

Forming a guiding pattern for guiding the engaging position of the fastening tape in the area of the label to be adhered, wherein the dimension of the product in the width direction of the guiding pattern is the same as the dimension of the product in the width direction of the absorbent body; Or smaller than it is ideal. Thereby, the engaging position of the fastening tape is guided to the central portion, and as a result, the pair of fastening tapes can be guided to overlap.

===This embodiment === <About the unique problem of low birth weight children>

For infants weighing less than 3000g (hereinafter referred to as low birth weight infants), especially for low birth weight infants weighing less than 2500g, as shown in Figure 12, there will be a requirement to keep the baby bent back into a C shape. The situation in which the foot is bent into an M-shaped posture. This posture is a posture that is close to the baby in the mother's body, and is a posture that is easy to make the baby quiet. In the following description, the posture shown in Fig. 12 is referred to as a "position posture". Further, in Fig. 12, although the posture of the crouching state is shown, there are cases of lateral or upward tilting.

In addition, in the case of low birth weight children, there is a case where it is required to be as close as possible to the body and no pressure is applied to the baby (hereinafter referred to as "minimum treatment"). In this miniaturization process, for example, it is required not only that the excrement is not leaked from the disposable diaper, but also that the baby is not touched as much as possible when the diaper is replaced.

According to the idea of minimal treatment, the disposable diapers used in low-weight children are easy to wear. If the adhesive tape is not easily removed when the diaper is replaced, there will be a burden on the baby due to the force of the adhesive tape being detached, so the adhesive tape of the disposable diaper used in the low-weight child will be required. "Easy to remove."

On the other hand, as shown in Fig. 13B, when the foot is moved in a posture in which the foot is bent into an M-shape, the foot moves in a state in which the foot is extended as shown in Fig. 13A. In the case of comparison, the force of turning up the adhesive tape from the vicinity of the baby's squirrel portion is large, so that the adhesive tape is easily detached. However, once the adhesive tape is detached, it will cause leakage of excrement, and the detached adhesive tape will give the baby if it is in contact with the baby. Stress such as sensation or pain, and violates the minimum treatment. Therefore, the adhesive tape of disposable diapers used in low-weight children will be required to be "not easy to fall off".

In other words, for the adhesive tape of the disposable diaper used for low-weight children, the coexistence of the functions of "easy to remove" and "not easy to fall off" is required.

<Summary shape of disposable diaper 1>

The disposable diaper 1 of the present embodiment is a disposable diaper for use in a low-weight infant having a body weight of 3000 g or less, and is particularly suitable for use in a low birth weight infant having a body weight of less than 2500 g. Also, in low birth weight infants, not only low birth weight infants (under 2500g), but also very low birth weight infants (under 1500g) or ultralow birth weight infants (under 1000g).

Fig. 1 is a developed plan view of the disposable disposable diaper 1 used for low birth weight infants. 2A to 2C are exploded explanatory views of the respective portions of the disposable diaper 1 used for low-weight children. Fig. 2A is an exploded explanatory view of the front portion 3. Fig. 2B is an exploded view of the lower portion 5 of the buttocks. Fig. 2C is an exploded explanatory view of the rear portion 7.

The disposable diaper 1 of the present embodiment is a so-called unfolded disposable diaper, and as shown in Fig. 1, the front portion 3, the lower buttocks 5, and the rear portion 7 are provided. The front portion 3 is a portion that is located at the front (ventral side, front waist) of the wearer. Further, the rear portion 7 is a portion that is located at the rear portion (back side, rear waist circumference) of the wearer. Lower part of the buttocks 5, To be a portion between the front portion 3 and the rear portion 7.

In the following description, as shown in Fig. 1, each direction is defined. That is, the direction from the front portion 3 toward the rear portion 7 is referred to as "product longitudinal direction L", and the direction orthogonal to the product longitudinal direction L is referred to as "product width direction W". Further, as shown in Fig. 2, the direction orthogonal to the product longitudinal direction L and the product width direction W is referred to as "thickness direction", the side of the wearer's skin is referred to as "skin side", and the opposite side is referred to as "non- Skin side".

The disposable diaper 1 is provided with a central belt-like region 12, side flaps 14, a thigh side hem 16, and a waist hem 18. A fastening tape 30 is attached to each of the pair of side wings 14, respectively.

The center strip-shaped region 12 is a strip-shaped region located at the center portion of the product width direction W formed by the front portion 3, the hip lower portion 5, and the rear portion 7 (see Fig. 1). The central strip region 12 is a portion that absorbs and retains liquid. The central strip-shaped region 12 is provided with a vertically long shape (a shape along the product longitudinal direction L) including the liquid-repellent absorbent body 21. The center strip-shaped region 12 mainly includes an absorber 21, a surface sheet 22, a leakage preventing sheet 23, and a back sheet 24 (see FIGS. 2A to 2C).

The absorber 21 is disposed across the front portion 3, the lower hip portion 5, and the rear portion 7. The area of the hatching of Fig. 1 shows the area occupied by the absorber 21. The absorber 21 is provided with an hourglass shape which is widened in the center portion of the longitudinal direction L of the product. However, the shape of the absorber 21 is not limited to the shape shown in Fig. 1, and may be a simple rectangle. Further, the absorbent body 21 may be provided at least in the lower part 5 of the buttocks. The absorber 21 is sandwiched between The surface sheet 22 and the leakage preventing sheet 23 are disposed.

The surface sheet 22 is a liquid permeable member disposed on the skin side (upper side in the drawing) of the absorber 21 . The leakage preventing sheet 23 is a liquid-impermeable member disposed on the non-skin side (lower side in the drawing) of the absorbent body 21. The back sheet 24 is a member (outer sheet) that constitutes a non-skin side of the disposable diaper 1 and is composed of a non-woven fabric. A back sheet 24 is disposed on the non-skin side of the leakage preventing sheet 23 .

A stretch film 25 is disposed between the absorber 21 and the back sheet 24 in the lower hip portion 5 of the center strip region 12. The stretch film 25 is a member that imparts stretchability to the center strip region 12 of the lower hip portion 5.

The side flaps 14 are located at both side edges of the product width direction W. The side flaps 14 are formed across the front portion 3, the lower hip portion 5, and the rear portion 7 (see Fig. 1). The width of the side flaps 14 located at the lower portion 5 of the buttocks is narrower than the width of the side flaps 14 located at the front portion 3 and the rear portion 7. Further, the side flaps 14 may not be disposed over the entire area of the product longitudinal direction L, and may be provided only at the rear portion 7, for example. The pair of side flaps 14 are respectively provided with thigh hem 15 (leg-surrounding and contracting portion) that expands and contracts along the longitudinal direction L of the product.

The side flaps 14 are mainly composed of the skin side sheet 26 and the back sheet 24 (see FIGS. 2A to 2C). The skin side sheet 26, the front portion 3, the gluteal lower portion 5, and the rear portion 7 are formed by spanning the member on the skin side, and the nonwoven fabric is formed. The skin side sheet 26 is also a member constituting the thigh side hem 16 (three-dimensional hem), and the outer side portion of the skin side sheet 26 (the portion outside the thick broken line portion 26A of FIG. 1) constitutes the side flap 14 .

An elastic member 27 is disposed between the skin side sheet 26 and the back sheet 24 in the lower hip portion 5 of the side flap 14. The elastic member 27 is a belt-shaped member that expands and contracts along the longitudinal direction L of the product. The elastic member 27 is configured to provide the thigh hem 15 by the stretchability of the skin side sheet 26 and the back sheet 24 applied to the lower buttock portion 5. The elastic member 27 is made of a stretchable nonwoven fabric, but may be made of a thread rubber or the like.

The thigh side hem 16 is a three-dimensional hem that prevents liquid from leaking out of the gap around the foot. A pair of thigh side hem 16 is formed along the product longitudinal direction L across the front portion 3, the hip lower portion 5, and the rear portion 7 (see Fig. 1). The thigh side hem 16 is formed so that the inner side of the side flap 14 covers both edges of the central strip-shaped region 12.

The thigh side hem 16 is mainly composed of a portion inside the skin side sheet 26 (see Fig. 2). The inner edge of the skin side sheet 26 of the lower buttocks 5 is stretchable by a line rubber or the like. The skin side sheet 26 is joined along the product longitudinal direction L at the joint portion 26A between the center strip region 12 and the side flaps 14 (the thick broken line in Fig. 1). The thigh side hem 16 (three-dimensional hem) is formed in a region on the inner side of the joint portion 26A of the skin-side sheet 26 with the joint portion 26A as a fulcrum.

The waist hem 18 is a waist stretchable portion that is disposed along the product width direction W of the rear portion 7 (see Fig. 1). In the rear portion 7, a waist hem film 28 is disposed between the absorber 21 and the back sheet 24 (see FIG. 2C). The waist gather film 28 is a belt-shaped stretch member that expands and contracts along the product width direction W. The waist gather film 28 is formed into a waist gather 18 by imparting stretchability to the back sheet 24 or the like. Waist ruffle film The length of the product 28 in the width direction W is longer than that of the absorbent body 21. Therefore, the waist hem 18 is also formed to protrude from the absorber 21 toward the outside in the product width direction W. Further, the waist hem 18 may not be provided.

The fastening tape 30 is a side flap 14 attached to the rear portion 7 (refer to Fig. 1). The fastening tape 30 is attached by sandwiching a part of the fastening tape 30 between the skin side sheet 26 and the back sheet 24 constituting the side flap 14 (see FIG. 2C).

In the front portion 3, a tape 29 to be adhered is provided (refer to Fig. 1). The adhesive tape 29 is a non-skin side of the back sheet 24 disposed on the front portion 3 (see FIG. 2A). The adhesive tape 29 is a member that can be engaged with the fastening tape 30 and is formed of a non-woven fabric. The tape 29 to be affixed constitutes a fastening region for engaging the fastening tape 30. Further, instead of arranging the tape 29 to be adhered to the non-skin side of the back sheet 24, the non-woven fabric of the outermost layer of the back sheet 24 may be formed with a region to be adhered.

The disposable diaper 1 can be worn by engaging the adhesive tape 30 with the tape 29 to be affixed. Further, as will be described later, the fastening tape 30 may be engaged with the other fastening tape 30.

In the disposable diaper 1 of the disposable diaper 1 of the present embodiment, the product length in the product longitudinal direction L (the size in which the product is stretched without creases) is in the range of 210 to 330 mm. For example, a disposable diaper 1 for a low birth weight infant weighing less than 2500 g has a product length of 310 mm, and a disposable diaper 1 for a very low birth weight infant weighing less than 1500 g After use of an ultra-low birth weight infant with a length of 270 mm and a weight of less than 1000 g The product length of the disposable diaper 1 was 230 mm.

Moreover, the waist size of the disposable diaper 1 used in the low-weight child of the present embodiment is in the range of 160 to 295 mm. Further, in the state in which the end portion of one of the fastening tapes 30 is joined to the end portion on the side of the side flap 14 of the hook sheet region C of the other fastening tape 30, the waist length is extended without creases. The state (for example, the state in which the waist hem 18 is elongated in the product width direction W when the waist hem 18 is formed). For example, the disposable diaper 1 for low birth weight infants has a waist size of 273.5 mm, and the disposable diaper 1 for very low birth weight infants weighing less than 1500 g has a waist size of 220 mm.

<Composition of the fastening tape 30>

3A and 3B are explanatory views of the fastening tape 30 of the present embodiment. Fig. 3A is a view as seen from the side of the hook sheet 34 of the fastening tape 30. FIG. 3B is a cross-sectional view of the periphery of the fastening tape 30.

As shown in FIG. 3A, the fastening tape 30 can be divided into a base end area A, an intermediate area B, a hook sheet area C, and a front end area D. Further, as shown in FIG. 3B, the fastening tape 30 is provided with a base sheet 32, a hook sheet 34, and a sheet 36 to be adhered.

The base end region A is a region joined to the side flaps 14. The proximal end region A is sandwiched between two sheets (the skin side sheet 26 and the back sheet 24) constituting the side flaps 14, and both sides of the proximal end region A are joined to the side flaps 14. Further, the proximal end region A is joined to the non-skin side surface of the side flap 14, and only one of the proximal end regions A may be joined to the side flap 14. Base region The regions other than A (the intermediate region B, the hook sheet region C, and the front end region D) are arranged to protrude from the side flaps 14 of the rear portion 7 toward the outside in the product width direction W.

The intermediate portion B is a region between the base end region A and the sheet region C. The hook sheet region C is a region where the hook sheet 34 is provided, and is a region (engagement region) that is engaged with the tape 29 to be stuck. Since there is no hook sheet 34 in the intermediate portion B, the bending rigidity of the intermediate portion B is smaller than that of the hook region, and the intermediate portion B is easily bent. Further, in the product shipping stage, as long as the intermediate portion B is bent and the hook sheet 34 is engaged with the side flap 14, the engaging surface of the hook sheet 34 is not exposed, which is preferable. The front end region D is a region outside the hook sheet 34. The front end region D functions as a "ear pick" that is pinched by the finger when the fastening tape 30 is attached or detached. Further, the region X of the third drawing is the region of the side flaps 14.

The base sheet 32 is a sheet which becomes a base material of the fastening tape 30. The base sheet 32 is composed of a non-woven fabric or a sheet laminated with a nonwoven fabric. Further, the base material sheet 32 is constituted by one sheet or a sheet in which a plurality of sheets are stacked (a nonwoven fabric or a sheet in which a nonwoven fabric is laminated with a film). The base sheet 32 is disposed over the entire area from the base end region A of the adhesive tape 30 to the front end region D.

The hook sheet 34 is a sheet that is engaged with the region to be adhered (here, the tape 29 to be affixed). The hook sheet 34 can also be engaged with the other fastening strip 30. A plurality of engaging hooks (not shown) are provided on the surface of the hook sheet 34 (the surface opposite to the side of the base sheet 32), and the hooking tape is hooked in the fastening region, so that the fastening tape 30 is stuck. Combined with the label With 29. The hook sheet 34 is bonded to the base sheet 32. The bonding of the hook sheet 34 to the base sheet 32 is carried out by using a hot-melt adhesive, but the joining method is not limited thereto. For example, the hook sheet 34 may be joined to the base sheet 32 by heat sealing or the like.

The affixed sheet 36 is a sheet of hook sheet 34 that can be snapped onto the other side of the fastening strip 30. The sheet 36 to be adhered is composed of one sheet or a sheet of non-woven fabric in which a plurality of sheets are overlapped. The sheet 36 to be bonded is bonded to the base sheet 32 on the side opposite to the hook sheet 34.

The adhered sheet 36 is disposed at least in the hook sheet region C and the front end region D. The adhered sheet 36 in the drawing is a part disposed on the proximal end region A (a portion on the intermediate portion B side of the proximal end region A), the intermediate portion B, the hook sheet region C, and the distal end region D. Thus, as long as the affixed sheet 36 is disposed from the base end region A to the front end region D, and the affixed sheet 36 is joined to the flank 14 at the base end region A together with the substrate sheet 32, the other side is When the fastening tape 30 is attached or detached, the sheet 36 to be adhered is not easily peeled off from the base sheet 32, which is preferable.

The adhered sheet 36 is not provided in a part of the base end region A (a portion on the opposite side from the intermediate portion B side). A waist gather film 28 is disposed in a region where the sheet 36 to be adhered is not provided (see FIG. 2C). That is, between the base end region A and the back sheet 24, the end portions of the adhered sheet 36 and the end portions of the waist gather film 28 are not sandwiched therebetween. Thereby, the step between the base end region A of the base sheet 32 and the back sheet 24 can be reduced, and the both the adhered sheet 36 and the waist gather film 28 can be easily sandwiched.

Further, the sheet 36 to be bonded may be disposed in the entire region from the base end region A to the front end region D in the same manner as the base sheet 32. Further, the sheet 36 to be adhered may not be disposed in the base end region A or the intermediate portion B. Moreover, as long as the engaging force (0.1 N/10 mm or more) described later can be achieved, the sheet 36 to be bonded can be omitted, and the base sheet 32 can be engaged with the other fastening tape 30.

Fig. 4A is an explanatory view showing a state in which the other fastening tape 30 is superposed on one of the fastening tapes 30.

As shown in FIG. 4A, in the case where a pair of fastening tapes 30 are overlapped, the lower fastening tape 30 is first engaged with the central portion of the front-loaded tape 29 of the front portion 3, and then the adhesive is applied. The buckle 30 is engaged with the other fastening tape 30. Therefore, a pair of fastening strips 30 will naturally be located in the central portion of the front portion 3 of the wearer. As a result, the portion of the fastening tape 30 that extends from the side flaps 14 (the intermediate portion B, the hook sheet region C, and the front end region D) is more away from the wearer's groin than the case shown in Fig. 13B. position. Thereby, even if the foot moves the foot in a posture in which it is bent into an M shape, compared with the case shown in Fig. 13B, the fastening tape 30 becomes less susceptible to being turned up from the groin. the power of.

Moreover, even if the fastening tape 30 cannot be engaged with the fastening tape 30, the fastening tape 30 can be fixed by fixing the pair of fastening tapes 30 to each other as shown in FIG. 4B. The position to leave from the squirrel of the wearer. However, in this case, as shown in Fig. 4B, there is a gap or skew in the disposable diaper 1 after use, and there is a possibility that the excrement leaks out, or the baby's movement is impeded to give the baby pressure, which is a violation of the low body Minimize the treatment of the child.

On the other hand, in the case where a pair of fastening tapes 30 are overlapped, as shown in Fig. 4A, there is a point that the disposable diaper 1 is not easily used to cause a gap or skew.

<Resistance of the fastening tape 30>

In order to fix the adhesive tape 30 (specifically, the hook sheet 34 of the fastening tape 30), the fastening force of the fastening tape 30 must be 0.1 N/10 mm or more. Further, if the engaging force of the fastening tape 30 is smaller than 0.1 N/10 mm, even if the fastening tape 30 can be engaged, the fastening tape 30 can be detached by an external force, and the adhesive tape 30 can be fixedly adhered. insufficient. Here, the engagement with a clamping force of 0.1 N/10 mm or more is referred to as "fixed adhesion".

The fastening tape 30 is an adhesively adhered area (in the labeled tape 29) that is fixedly adhered to the front portion 3. Therefore, when the engaging force of the fastening tape 30 (hook sheet 34) and the adhered tape 29 of the front portion 3 is P1 (unit: N/10 mm), P1 is required to be 0.1 N/10 mm or more.

Furthermore, the fastening tape 30 of the present embodiment is also fixedly adhered to the adhered sheet 36 of the other fastening tape 30. Therefore, when the engaging force of the fastening tape 30 (hook sheet 34) and the adhesive-bonded sheet 36 of the other fastening tape 30 is P2 (unit: N/10 mm), P2 is required to be 0.1 N/10 mm or more.

On the other hand, in order to easily remove the fastening tape 30, the fastening force of the fastening tape 30 is preferably 0.5 N/10 mm or less. Therefore, if the engaging force of the fastening tape 30 exceeds 0.5 N/10 mm, the fastening tape 30 will change. It is not easy to remove, and the force of the baby is removed by peeling off the adhesive tape 30, which is a violation of the minimum treatment for low birth weight children. Therefore, the engaging force of the fastening tape 30 is preferably in the range of 0.1 to 0.5 N/10 mm.

Further, in the present embodiment, the engagement force between the fastening tape 30 and the adhered tape 29 of the front portion 3 is taken as P1, and the fastening tape 30 and the adhesive sheet 30 of the other fastening tape 30 are bonded. When the engaging force is P2, it is the relationship of P1>P2. The relationship is such that the rigidity of the fastening strip 30 must be suppressed even if the fastening strip is in contact with the wearer to inhibit the pressure on the wearer due to the material or thickness of the affixed sheet 36 of the fastening strip. There are restrictions. Here, P1 is 0.5 to 0.7 N/30 mm (a value of 1/3 when the unit is N/10 mm), and P2 is 0.8 to 1.1 N/30 mm.

The engagement force of the fastening tape 30 was measured using an Auto Graph tester (AG-X10plus) manufactured by Shimadzu Corporation. Specifically, in order to prepare a piece of the hook tape region C from the measuring object, the hook sheet region C is cut out into a rectangular shape as wide as possible. Similarly, a piece of the adhered object (the adhered tape 29 or the adhered sheet 36) from which the fastener tape 30 is engaged is prepared, and a sample larger than the hook sheet 34 is cut out.

Next, a 700 g roller (85 mm in diameter and 45 mm in width) was moved at a speed of 5 mm/min along the loading and unloading direction of the main fastening tape 30, and two samples were pressed. The next two samples will be pressed and placed in the above Auto Graph tester, and the tensile speed is measured at 300 mm/min. The clamping force of the two samples is then converted into the width of the original width of the sample, and the value is used as the engaging force (unit: N/10 mm). At this time, as shown in Fig. 5, the stretching direction is set so as to be 135 degrees with respect to the surface to be bonded (the jig surface on which the sample of the object to be bonded is placed). The peeling direction of the hook sheet is the main loading and unloading direction when the adhesive tape 30 is handled (loaded and unloaded).

<Status of overlapping adhesive tapes 30>

Fig. 6A is an explanatory view showing a state in which the adhesive tape 30 which is the lower side is fixedly adhered to the tape 29 to be adhered. Fig. 6B is an explanatory view showing the adhesion of the other fastening tape 30 to the fastening tape 30 of Fig. 6A.

As shown in FIG. 6B, when the pair of fastening tapes 30 are overlapped in a state in which the center of the adhesive tape 30 in the direction of the width of the adhesive tape 30 is overlapped, the upper fastening tape 30 is a fastener which is directed to the lower side in the direction of the bandwidth. The ends of the straps 30 are fixedly adhered to the straps 29 that are adhered to the sides of the span. In the figure, the adhesive tape 30 (hook sheet 34) on the upper side is fixedly adhered to the area of the tape 29 to be adhered with a hatching.

As described above, the engagement force P1 with the adhesive tape 29 is larger than the engagement force P2 of the other fastening tape 30 (P1 > P2). In such a case, the adhesive tape 30 on the upper side of the embodiment is engaged with the tape to be adhered in the region of the hatching of the sixth drawing, so that it is engaged only with the lower fastening tape 30. In comparison, the clamping force will be higher.

In addition, the root end side (the side of the side flap 14) of the fastening tape 30 is located closer to the groin than the end portion, so the root end side of the fastening tape 30, if and the end portion Than, will be subject to greater upturn. However, in the present embodiment, on the root end side of the fastening tape 30 (the portion subjected to a large upward force), the upper fastening tape 30 is fixedly adhered to the adhered label by the adhesive tape 30 on the lower side. The belt 29 (refer to the hatching of Fig. 6B) has a high engagement force on the root end side of the fastening tape 30, so that the fastening tape 30 is not easily peeled off.

On the other hand, the adhesive tape 30 on the upper side spans the end portion of the lower end of the fastening tape 30 in the direction of the bandwidth, and conversely, the end of the upper fastening tape 30 becomes only on the lower side. The structure above the fastening strip 30. The end portion of the upper fastening tape 30 has a lower clamping force than the root end side of the tape to be bonded to the label. Therefore, grasping the end of the fastening tape 30 makes it easy to remove the fastening tape 30.

As described above, in the present embodiment, the fastening tape 30 can coexist with the front and back functions of "easy to remove" and "not easy to fall off". Since the fastening tape 30 is easily detached, the adhesive tape 30 can be peeled off without stressing the baby. Therefore, the disposable diaper 1 of the present embodiment is suitable for a low-weight child (weight) requiring minimal treatment. Infants under 3000g). On the other hand, even when the foot is moved in the M-shaped state, the fastening tape 30 is not easily peeled off. Therefore, the disposable diaper 1 of the present embodiment is suitable for requiring a low posture. Weight.

In the present embodiment, as shown in FIG. 6B, in the state where the end portion of the hook sheet region C on the side of the side flap 14 of the lower side of the fastening tape 30 is brought together, the end portion of the upper side of the fastening tape 30 is brought together. Further, in a state where the center of the adhesive tape 30 in the width direction is matched, the pair of fastening tapes 30 overlap each other. Then, when one of the pair of the fastening tapes 30 is overlapped, In the embodiment, the adhesive tape 30 on the upper side is fixedly adhered to the adhesive tape 29 across the ends of the adhesive tape 30 on the lower side in the direction of the bandwidth. Further, in the present embodiment, since the waist size of the design of the disposable diaper 1 is used, the end portion of one of the fastening tapes 30 is flanked by the hook sheet region C of the other fastening tape 30. The state of the end portion of the 14 side is the reference. Therefore, under the design standard, the upper side of the adhesive tape 30 can be fixed to the side of the end of the lower side of the fastening tape 30 in the direction of the bandwidth, and is fixedly adhered to the adhesive. Buckle belt 29. However, the position of the fastening tape 30 on the upper side of the lower fastening tape 30 is not limited to the position shown in FIG. 6B. If the upper fastening tape 30 is staggered to the left or right than the position shown in FIG. 6B, only the end portions of the fastening tape 30 that straddle the lower side in the direction of the bandwidth are fixedly adhered to the adhesive tape. 29, the engaging force on the root end side of the fastening tape 30 becomes higher, and the fastening tape 30 is less likely to fall off.

Further, in the present embodiment, the width (the dimension in the width direction) of the end portion on the side of the side flap 14 of the hook sheet region C is larger than the width of the end portion of the fastening tape 30. By forming the fastening tape 30 into such a shape, when the pair of fastening tapes 30 are overlapped in a state in which the center of the adhesive tape 30 is aligned in the width direction, the upper fastening tape 30 can be spanned in the direction of the bandwidth. The two ends of the lower end of the fastening tape 30 are fixedly adhered to the tape 29 to be adhered.

7A and 7B are explanatory views of the shape of the hook sheet region C of the fastening tape 30 of the comparative example. In the comparative example, contrary to the present embodiment, the width of the end portion of the hook sheet region C on the side of the side flap 14 is smaller than the width of the end portion of the fastening tape 30 (see Fig. 7A). Its knot In the comparative example, the end portions of the upper adhesive tape 30 are all fixedly adhered to the adhesive tape 29, and the engaging force at the end of the upper adhesive tape 30 becomes larger, and becomes upper. The fastening strip 30 is not easy to remove. Further, in the comparative example, the engaging force on the root end side of the upper side of the fastening tape 30 is small, and when the foot bent in the M-shaped state moves, the force from the squirrel portion is received, and the upper side of the fastening tape 30 is received. Will become easy to fall off.

<Modification of the shape of the fastening tape 30>

8A and 8B are explanatory views of a first modification of the shape of the fastening tape 30. In the first modification, the size of the fastening tape 30 in the width direction is smaller as the end portion is smaller. Moreover, in the first modification, the size of the hook sheet 34 in the width direction is also smaller as the closer the end portion is.

In the first modification, when the pair of fastening tapes 30 are overlapped in a state in which the center of the adhesive tape 30 is aligned in the width direction, the upper fastening tape 30 can be passed over the lower side of the fastening tape 30 in the width direction. The end of the band 30 is fixedly adhered to the tape 29 to be adhered at both sides of the crossing. Therefore, in the first modification, the fastening tape 30 can also coexist with the front and back functions of "easy to remove" and "not easy to fall off".

Moreover, in the first modification, the size of the fastening tape 30 in the width direction is smaller as the end portion is smaller. Therefore, in the first modification, even at the position of the end portion on the side of the side flap 14 of the hook sheet region C of the lower side of the fastening tape 30, the end of the hook sheet region C is not the end portion of the upper side of the fastening tape 30. In a state in which the side portion (the side of the side flap 14 and the end portion on the opposite side) are combined, the hook sheet 34 of the upper side of the fastening tape 30 may also cross the lower side in the direction of the bandwidth. The two sides of the adhesive tape 30 are fixedly adhered to the adhesive tape 29.

Figs. 9A and 9B are explanatory views of a second modification of the shape of the fastening tape 30. In the fastening tape 30 of the second modification, since the center portion has a concave waist, the bandwidth is not as small as the end portion. However, in the second modification, when the pair of fastening tapes 30 are overlapped in a state in which the center of the fastening tape 30 in the width direction is matched, the upper fastening tape 30 may also cross the lower side in the width direction. The ends of the fastening tape 30 are fixedly adhered to the tapes 29 to be adhered on both sides of the tape. Therefore, in the second modification, the fastening tape 30 can also coexist with the front and back functions of "easy to remove" and "not easy to fall off".

<pattern of the affixed label>

Fig. 10 is an explanatory view of the pattern of the tape 29 to be affixed, and the pattern of the affixed sheet 36 of the fastening tape 30.

A stripe pattern composed of concavities and convexities is applied to the surface of the tape 29 to be adhered. This unevenness is formed by a non-woven fabric constituting the outermost layer of two or more kinds of non-woven fabrics of the tape-attached tape 29, and is formed by interlacing a groove having a large amount of fibers with a groove having a small amount of fibers.

A stripe pattern composed of concavities and convexities is also applied to the surface of the adhesive-bonded sheet 36 of the fastening tape 30. The unevenness of the sheet 36 to be adhered is also formed by the non-woven fabric of the outermost layer of the sheet 36 to be bonded, by the ridges having a large amount of fibers, and the grooves having a small amount of fibers. In the present embodiment, since the engaging force P2 of the fastening tape 30 and the fastening tape 30 must be 0.1 N/10 mm or more, the adhesive-bonded sheet 36 composed of the non-woven fabric is relatively thick, so that the unevenness can be realized. shape to make.

In the present embodiment, the width or interval of the unevenness on the surface of the tape-attached tape 29 is substantially the same as the width or interval of the unevenness on the surface of the adhesive-bonded sheet 36 of the fastening tape 30. That is, in the present embodiment, a common uneven pattern is applied to the surface of the adhered tape 29 and the adhered sheet 36. Thus, by making the pattern of the adhesive tape 29 and the fastening tape 30 the same, the texture of the two members will be the same, and the texture of the two members will not be changed, so that it is more beautiful. Moreover, the belts 29 of the adhesive label and the pattern of the fastening tape 30 can be naturally guided and engaged, so that the extreme skew of the fastening tape 30 with respect to the adhesive tape 29 can be suppressed.

Further, the concave-convex pattern common to the surface of the adhered tape 29 and the surface of the adhered sheet 36 may not be completely the same. For example, the embossed tape 29 having the embossed pattern may be embossed, and the embossed sheet 36 having the embossed pattern may be embossed. Even in such a case, as long as the concave-convex patterns are common, the texture will be the same, and the pattern of the adhered tape 29 and the fastening tape 30 can be guided and engaged. Further, the pattern common to the surface of the adhered tape 29 and the surface of the adhered sheet 36 is not limited to the concave-convex pattern, and may be other patterns. Further, the pattern common to the surface of the adhered tape 29 and the surface of the adhered sheet 36 is not limited to a pattern of the same size, and may be a pattern of a similar shape having a different size.

Further, in the present embodiment, the ridges or grooves constituting the uneven pattern of the fastening tape 30 are formed along the width direction, and the unevenness is along the belt length. Configure to interactive. Therefore, the fastening tape 30 is easily bent toward the belt length direction and is not easily bent in the direction of the bandwidth. Since it is easy to bend toward the belt length, the fastening tape 30 can be easily removed. On the other hand, since it is not easy to bend in the direction of the bandwidth, the fastening tape 30 can have rigidity with respect to the force from the groin portion (force from below).

Fig. 11 is an explanatory view of a guide pattern formed on the tape 29 to be adhered.

The guiding pattern is a pattern for guiding the engaging position of the fastening tape 30. Here, the guide pattern is a pattern in which the range of the rectangle is colored. Further, the guide pattern is not limited to this, and the guide pattern may be formed by a rectangular outline line or four L-shaped patterns of four corners of a rectangular area, or by drawing characters in a rectangular area. , numbers, symbols, patterns, styling characters, etc. to form a guide pattern. Further, the guide pattern is not limited to a rectangle, and may be an ellipse.

As shown in Fig. 11, the dimension of the product in the width direction W of the guide pattern is the same as or smaller than the dimension of the product width direction W of the absorbent body 21. That is, the dimension of the product in the width direction W of the guide pattern is equal to or less than the dimension of the product width direction W of the absorbent body 21. Thereby, the engaging position of the fastening tape 30 can be guided to the central portion of the front portion 3, and as a result, the other fastening tape 30 can be guided over the lower fastening tape 30 to be engaged. .

By the way, since the absorber 21 is a relatively thick member (see FIG. 2), the force can be absorbed (mitigated) when the wearer moves in the posture. Therefore, as long as the fastening tape 30 is engaged with the specific absorbent body 21 is further inward of the product width direction W, and even if the wearer in the posture is moved, the force is not easily transmitted to the fastening tape 30, and the fastening tape 30 becomes less likely to fall off. Therefore, the size of the product width direction W of the guide pattern is equal to or less than the dimension of the product width direction W of the absorbent body 21, so that the effect that the fastening tape 30 is not easily peeled off can be obtained.

Further, in the present embodiment, the region to which the label is adhered (here, the tape 29 to be adhered) is wider than the guide pattern. Therefore, even if the fastening tape 30 is exposed from the guiding pattern, the fastening tape 30 can be engaged with a sufficient engaging force.

===Other ===

The above embodiments are intended to facilitate the understanding of the invention and are not intended to limit the invention. The present invention is of course changed and improved without changing the essence, and it is needless to say that the equivalent is contained in the present invention.

29‧‧‧Buckled belt

30‧‧‧Buckle belt

34‧‧‧ hook sheet

Claims (6)

A disposable diaper which is a disposable diaper for use in an infant weighing less than 3000 g, characterized in that: a flank, a pair of gussets disposed on the flank, and a viscous bond The affixed area of the buckle is overlapped by the adhesive tape on one side of the pair of fastening tapes, and the other fastening tape is engaged, and the affixed area is adhered to the one side. When the engaging force of the buckle is P1, and the engaging force of the one of the above-mentioned fastening tapes and the other fastening tape is P2, the relationship is P1>P2>0.1N/10 mm, and the fastening tape is provided. When the center of the bandwidth direction is matched, when the pair of the fastening tapes are overlapped, the upper fastening tape can be engaged at both sides of the end portion of the lower fastening tape in the direction of the bandwidth. The area marked above. The disposable diaper according to claim 1, wherein the fastening tape has an engaging area that is engaged with the area of the affixed label, and the end of the upper side of the fastening tape is provided. The pair of fasteners are in a state in which the center of the end portion of the engagement region of the lower side of the fastening tape is in the state of the end of the side of the side of the adhesive tape When the belts are overlapped, the upper side of the fastening tape can be engaged with the above-mentioned quilt at both sides of the end of the lower end of the fastening tape in the direction of the above-mentioned width. The area of the label. The disposable diaper according to claim 1 or 2, wherein the fastening tape is provided with an engaging area that is engaged with the area of the adhered label, and the side of the flank of the engaging area The width of the end portion is larger than the width of the end portion of the above-mentioned fastening tape. The disposable diaper according to any one of claims 1 to 3, wherein the fastening tape is provided with a affixed sheet which can be engaged with the other fastening tape. A common pattern is applied to the surface of the above-mentioned label and the surface of the above-mentioned sheet to be adhered. The disposable diaper according to the fourth aspect of the invention, wherein the embossed area and the surface of the affixed sheet are provided with a stripe pattern formed by the unevenness, wherein the unevenness is Interacting along the length of the belt of the above-mentioned fastening tape. The disposable diaper according to any one of claims 1 to 5, wherein a guide pattern for guiding an engagement position of the fastening tape is formed in the region of the affixed label, The dimension of the product of the above-mentioned guiding pattern in the width direction is the same as or smaller than the dimension of the above-mentioned product of the absorbent body in the width direction.