JP4429039B2 - Disposable paper diapers - Google Patents

Description

  In consideration of the relationship between the stretchability of the fastening member and the stretchability of the back waist part, the present invention regulates the stress at the time of extension, thereby improving the wearing feeling according to the age of the baby, etc. The present invention relates to a disposable paper diaper that prevents body fluid from leaking.

  As shown in FIG. 4, a tape-type paper diaper conventionally provided on the market is provided with fastening members 50, 50 on both sides of the back body of the paper diaper for mounting. Polyethylene and the like attached to the surface of the liquid-impervious backsheet 1A on the outer surface of the paper diaper after bringing the fastening members 50 and 50 to the ventral side after the body and the back body are respectively applied to the wearer's body The paper diaper is fixed by being fixed to a front target tape 51 made of a plastic material.

In addition, a plurality of elastic elastic members 52, 52,... Are arranged along the waist circumference direction at least on the waist part (preferably including the waist portion) on the back side. The back side waist portion is expanded and contracted in the waist direction so as to fit the wearer well (for example, see Patent Documents 1 and 2 below). The fastening means for the fastening member includes a tape having an adhesive layer and a tape having mechanical fastener means, and the example shown in FIG. 4 is the former example. In the case of the latter mechanical fastener means, a mechanically engageable sheet is stuck on the stomach side, or the outer surface of the paper diaper is made of non-woven fabric, and the fastening member mechanical fastener means (male hook) ) Can be engaged at any position.
Japanese Patent Laid-Open No. 10-137292 Japanese Patent Laid-Open No. 10-211236

  However, in this type of disposable diaper, the one that defines the stress at the time of extension of the fastening member 50 has been known so far, but the relationship between the stretchability of the fastening member 50 and the stretchability of the back side waist portion is known. There was no one that specified the stress at the time of stretching in consideration of the properties.

  For this reason, there is no interlocking between the elasticity of the fastening member and the elasticity of the back waist part, and it is easy to shift, or the stress at the time of extension of the fastening member is too strong, which puts a burden on the wearer's abdomen However, it is difficult to wear, and conversely, the stress at the time of extension of the back waist portion is too strong, and the wearer moves easily and the problem is that it is easily displaced. Also, even if you say a baby, it varies depending on your age, from infants who can't walk, toddlers to babies who can move around actively. The wearing feeling cannot be improved.

  Therefore, the main problem of the present invention is to consider the relationship between the stretchability of the fastening member and the stretchability of the back waist part, and to regulate the stress at the time of extension, so that it corresponds to the age of the baby, etc. An object of the present invention is to provide a disposable paper diaper which improves the wearing feeling and prevents body fluid from leaking.

In order to solve the above-mentioned problem, the present invention according to claim 1 is provided with a fastening member that protrudes laterally and has elasticity on both sides of the back side of the paper diaper, and the fastening member is provided on the ventral surface of the paper diaper. The disposable diaper is attached to the body by being fastened to the body, and at the back waist part, an elastic elastic member is disposed along the waist direction so that the back waist part can be stretched in the waist direction. And a disposable paper diaper in which a three-dimensional gather standing on the surface side is formed on both sides of the paper diaper by a side gather nonwoven fabric made of a nonwoven fabric,
The paper diaper has an absorbent body interposed between a liquid-permeable top sheet and a back sheet nonwoven fabric made of a nonwoven fabric and covering the outer surface side of the paper diaper, and at least between the absorbent body and the back sheet nonwoven fabric. A waterproof film is disposed in a range from the ventral side edge to the back side edge, covering the entire area of the absorbent body , and at least on the back side of the paper diaper, the backsheet nonwoven fabric, the waterproof film, and the liquid-permeable topsheet are It is a structure that extends together and has an end flap part that does not have an absorber ,
One or a plurality of elastic elastic members in the back waist part are arranged in the waist direction with respect to the end flap part so that they do not overlap with the fastening members over almost the entire area between the fastening members on both sides. The longitudinal dimension of the diaper in the stretchable region of the back waist part is 25 mm or more,
On both sides of the paper diaper, side flap portions are formed by the backsheet nonwoven fabric and the side gather nonwoven fabric,
The fastening member is composed of an attachment part to a paper diaper and a fastening main body part protruding sideways, and the attachment part to the paper diaper is between a backsheet nonwoven fabric and a gather sheet nonwoven fabric of the side flap part. fixed Rutotomoni, the arrangement area and the attachment to the disposable diaper of the resilient and elastic members of the back waist section is disposed so as to have a margin overlap in the longitudinal direction of the disposable diaper,
Both the fastening member and the back waist portion have a 50% elongation stress of 50 to 500 gf / 25 mm, and the fastening member 50% elongation stress and the back waist portion 50% elongation stress are substantially the same. A disposable paper diaper characterized by being set to be provided.

  According to the first aspect of the present invention, the fastening member and the back waist portion both have a 50% elongation stress of 50 to 500 gf / 25 mm, and the fastening member has a 50% elongation stress. Since the stress at the time of 50% elongation of the back side waist portion is set to be substantially the same, when the fastening member is pulled to the abdomen side and fastened, the stretchability of the fastening member and the stretchability of the back side waist portion are Since it is synchronized, the waist side and back side can be evenly extended, and there is no bias in stretchability, making it difficult for the paper diaper to shift and effectively preventing side leakage and back leakage. Will be able to prevent.

As the invention of claim 2, wherein, disposable diapers according to claim 1 Symbol placement total stretch allowance of the fastening member and the back-side waist portion is 40~150mm is provided. The wearer's (the size of the baby's waist is subject to fluctuations of about 20 to 75 mm in the presence / absence of meals, sitting, and high / high movements, so the total expansion / contraction allowance of the fastening member and the back waist part is 40 It is desirable to be set to ˜150 mm.

As a third aspect of the present invention, there is provided the disposable paper diaper according to any one of the first and second aspects, wherein at least one of the fastening member and the back waist portion has an elongation rate exceeding 100%. It is desirable that at least one member has an elongation rate exceeding 100% from the viewpoint of wearability and followability of body shape change.

  As described above in detail, according to the present invention, considering the relationship between the stretchability of the fastening member and the stretchability of the back waist portion, by defining the stress at the time of elongation, the age and behavior of the baby can be adjusted. In addition, since the stretchability of each part is set, it is possible to truly improve the feeling of wearing and to effectively prevent leakage of body fluids.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partially broken development view of a disposable diaper according to the present invention, and FIG.

  In FIG. 1, the disposable paper diaper is made of a perforated or non-porous nonwoven fabric or a perforated plastic sheet and the like, a liquid-permeable top sheet 2 that covers the use surface side, and a nonwoven fabric that covers the outer surface side of the paper diaper. Then, it consists of the back sheet nonwoven fabric 1 which comprises the side flap part SF with the side gather nonwoven fabric 4 mentioned later, and the cotton-like pulp etc. which were interposed between the said liquid-permeable top sheet 2 and the back sheet nonwoven fabric 1, for example, an hourglass The absorbent body 3 having a certain degree of rigidity (or rectangular shape or the like) and polyethylene or the like disposed between the absorbent body 3 and the backsheet nonwoven fabric 1 so as to cover at least the entire area of the absorbent body 3. The waterproof film 9 and a three-dimensional gather BS standing on the surface side are formed on both sides of the paper diaper. Side gather nonwoven fabric 4 for constituting side flap portion SF together with sheet nonwoven fabric 1, fastening members 6 and 6 for wearing paper diapers provided on both sides of the back side, and the fastening provided on the stomach side surface It is mainly composed of a front target tape 10 for fastening the member 6.

  Further, the back sheet nonwoven fabric 1, the waterproof film 9 and the liquid permeable top sheet 2 extend together on the abdomen and the back side of the paper diaper to form an end flap portion EF in which the absorbent body 3 does not exist, and the end flap portion With respect to EF, one or a plurality of elastic elastic members 8, 8,... Specifically, in the illustrated example, three elastic elastic members 8, 8,... Are disposed on the abdominal waist portion, and nine elastic elastic members 8, 8,. The waist is stretchable. In this case, it is desirable to secure a width (dimension longitudinal dimension) of the stretchable region of the back side waist portion of 25 mm or more. In the illustrated example, in the back waist portion, the stretchable region does not cross the absorber 3, but the width of the region where the elastic stretchable members 8, 8. You may cross. Further, the elastic member that crosses the absorbent body 3 and extends in the direction around the waist may be processed so that the elastic member loses its elasticity by being cut or cut off on the absorbent body 3.

  As the elastic expansion / contraction member 8, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, and polyester that are usually used can be used. In addition, the elastic elastic member 8 may be a sheet-like or ribbon-like composite material in which the above-mentioned material is combined with a nonwoven fabric or paper.

  In this invention, it replaces with the liquid-impermeable backsheet by polyethylene etc. which are normally used in order to cover the outer surface of a diaper, and the backsheet which consists of a nonwoven fabric is used, and between the absorber 3 and the backsheet nonwoven fabric 1 is used. Although a waterproof film 9 made of polyethylene or the like is interposed between the two, a paper diaper in which a liquid-impervious back sheet is provided on the outer surface and the waterproof film 9 is omitted as in the related art.

The waterproof film 9 has an hourglass shape similar to that of the absorber 3, and both side edges are formed to extend slightly laterally from the side edges of the absorber 3 (this portion is referred to as a side extending portion K _S ). .), it is fixed by such liquid-pervious top sheet 2 and the hot melt adhesive in this side extending portion K _S. The waterproof film 9 may have any shape such as a rectangle as long as it can cover the absorber 3 larger than the side edges and upper and lower ends of the absorber 3.

  Moreover, the said back sheet nonwoven fabric 1 is laminated | stacked on the outer surface side of the said waterproof film 9, is extended to the position which comprises the outline of a paper diaper, and forms the side flap part SF with the side gather nonwoven fabric 4 mentioned later.

  In recent years, a film having moisture permeability is preferably used as the waterproof film 9 from the viewpoint of preventing stuffiness. This water and moisture permeable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then centrifuging in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.

On the other hand, side gathers nonwoven 4, the width direction intermediate portion in the region spanning absorber 3 side edges from lateral extending portion K _S is fixed along a substantially longitudinal direction of the paper diaper, the side than the fixing portion The extending nonwoven fabric sheet portion together with the backsheet nonwoven fabric 1 constitutes a side flap SF. In the side flap portion SF, a plurality of elastic stretch members 7, 7 in the illustrated example are disposed between the side gather nonwoven fabric 4 and the back sheet nonwoven fabric 1 in the longitudinal direction of the paper diaper. GK is formed. This flat gather GK holds the paper diaper tightly around the legs when worn, thereby improving fit and preventing the paper diaper from shifting. In addition, when the paper diaper is held tightly, the three-dimensional gather BS is mounted upright along the legs without turning over.

  On the other hand, a three-dimensional gather BS standing on the surface side is formed by the nonwoven fabric sheet portion on the inner side of the fixed portion of the side gather nonwoven fabric 4. This three-dimensional gather BS has a standing end near the side edge of the absorbent body 3, and its tip is folded back twice along the longitudinal direction of the paper diaper, and one elastic elastic rubber 5 is placed inside the folded portion. If necessary, a plurality of elastic elastic rubbers are provided, and the three-dimensional gather BS is erected using the elastic force. As the elastic elastic rubber 5, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, and the like that are usually used can be used.

  Examples of the material fibers constituting the back sheet nonwoven fabric 1, the liquid-permeable top sheet 2, and the side gather nonwoven fabric 4 include olefin-based, polyester-based, and amide-based synthetic fibers such as polyethylene or polypropylene, rayon, cupra, and the like. Non-woven fabric obtained by an appropriate processing method such as a spunbond method, a thermal bond method, a melt blown method, a needle punch method, etc. can be used. As the side gather nonwoven fabric 4 and the back sheet nonwoven fabric 1 constituting the part SF, it is preferable to use a nonwoven fabric excellent in air permeability by suppressing the basis weight of rice in order to eliminate the feeling of stickiness and prevent stuffiness.

  In this disposable paper diaper, the side flap portion SF is made of a non-woven fabric, so that the portion has liquid permeability, but the liquid permeability is reduced as much as possible to prevent the passage of body fluids and to prevent fogging. In order to improve the touch to the skin (dry feeling), it is desirable to use a water-repellent non-woven fabric coated with a silicon-based, paraffin metal-based, alkylchromic croid-based water repellent or the like.

  On the other hand, the fastening member 6 for fixing the paper diaper to the body is inserted firmly between the back sheet nonwoven fabric 1 and the gather sheet nonwoven fabric 4 and firmly fixed by a hot melt adhesive or the like. Yes. Moreover, the back sheet nonwoven fabric outer surface (clothing surface side) and the inner end side of the base material may be joined by heat sealing or ultrasonic bonding. The said fastening member 6 is attached to the substantially continuous position so that it may interlock | cooperate with the elastic expansion-contraction member 8,8 ... arrange | positioned at the back side waist part.

  A surface fastener sheet 11 having male / female mechanical fastener means on its surface is attached to the inner surface side of the fastening member 6 and has a female / male mechanical fastener function attached to the ventral surface of the paper diaper. A paper diaper is attached to the body by being fastened to the front target tape 10 provided.

  In the present paper diaper, the fastening member 6 is provided with stretchability in the protruding direction of the tape, that is, the waist circumference direction. In order to give stretchability to the substrate, for example, a stretchable laminate sheet obtained by melt-laminating a thermoplastic resin to a nonwoven fabric, a stretchable laminate sheet obtained by point-bonding an elastomer film and a nonwoven fabric, and a nonwoven fabric / Examples thereof include a stretchable laminated sheet having a three-layer structure composed of an elastomer film / nonwoven fabric and point-bonding each layer at discontinuous joining points. Here, the nonwoven fabric needs to be stretchable in the direction of elongation. For example, it has a spunlace nonwoven fabric that has excellent extensibility because it does not have a joining point or a fusion point, or has a fusion point but a gap between each fusion point. A spunbonded nonwoven fabric or the like that has been given stretchability by shrinking or the like is suitable. The fastening member 6 shown in FIG. 3 is an example of a stretchable laminated sheet having a three-layer structure composed of a nonwoven fabric 12 / elastomer film 13 / nonwoven fabric 12, and since the front and back surfaces are both nonwoven fabrics, the contact with the skin is soft. More preferable than other stretchable laminated sheets. Moreover, in order to give the nonwoven fabric a high extensibility, a large number of perforations may be formed in the nonwoven fabric, or a number of perforated cuts may be formed in a direction perpendicular to the elongation direction.

  In the present invention, the stretchability imparting patterns of the fastening member 6 and the back waist portion are diversified to improve the wearability of the disposable diaper corresponding to the baby's age. Therefore, the following three patterns are mentioned as a combination of the expansion / contraction force of the fastening member 6 and the back waist portion and the magnitude relationship thereof. The expansion / contraction performance of the fastening member 6 and the back waist portion is evaluated on the basis of 50% elongation stress. For this 50% elongation stress, a sample with a width of 25 mm was prepared, the sample was fixed to an elongation tester with an integrating device so that the distance between chucks was 100 mm, and then the fixed sample was fastened at a speed of 300 mm / min. The stress when stretched 50%.

[First pattern]
In the first pattern, both the fastening member 6 and the back waist portion are subjected to 50% elongation stress for the purpose of mainly improving the interlocking property between the fastening member 6 and the back waist portion. The stress at the time of 50% elongation of the fastening member and the stress at the time of 50% elongation of the back side waist portion are set to be substantially the same. If the stress at the time of 50% elongation of the fastening member 6 or the back waist part is less than 50 gf / 25 mm, the stretching force is too weak and the fitting property is lost, so that leakage and misalignment of the paper diaper are likely to occur. . On the other hand, if the stress at the time of 50% elongation of the fastening member 6 and the back waist part exceeds 500 gf / 25 mm, there arises a problem that the pressure applied to the wearer's abdomen is increased, and the absorbent body 3 is excessive on the back side. A problem such as the occurrence of twisting in the absorber 3 due to the application of force occurs.

  Advantages of the disposable paper diaper according to the first pattern are (1) It is possible to take a large stretch allowance at the time of wearing, the fastening member 6 is easy to stop, (2) the paper diaper is difficult to slip, (3) the side part Leakage and backside leakage can be effectively prevented. That is, in the first pattern, since the 50% elongation stress of the fastening member and the 50% elongation stress of the back waist portion are set to be substantially the same, the fastening member 6 is pulled to the abdomen to fasten. At this time, since the stretchability of the fastening member 6 and the stretchability of the back waist part are synchronized with each other, the waist side and the back side can be evenly stretched, so that the stretch allowance can be increased. Easy to install. In addition, in order to give the uniform elastic force of the entire waist, the elastic force of the fastening member 6 and the elastic force of the back waist part are interlocked with the movement, so that displacement can be effectively prevented. In addition, side leakage and backside leakage can be effectively prevented.

[Second pattern]
In this pattern, the stress at 50% elongation of the fastening member 6 is 50 to 500 gf / 25 mm and the stress at 50% elongation of the back waist portion mainly for the purpose of reducing the burden on the stomach of the wearer of the disposable diaper. Is set to be 200 to 1000 gf / 25 mm so that the stress at the time of 50% elongation of the fastening member 6 is smaller than the stress at the time of 50% elongation of the back waist portion. When the stress at the time of 50% elongation of the fastening member 6 is less than 50 gf / 25 mm, a slippage tends to occur on the stomach side of the paper diaper, and when the stress at the time of 50% elongation of the dorsal waist portion is less than 200 gf / 25 mm. However, misalignment of paper diapers is likely to occur. On the other hand, if the stress at the time of 50% elongation of the fastening member 6 exceeds 500 gf / 25 mm, the pressure applied to the abdomen of the wearer becomes strong and difficult to wear, and the stress at the time of 50% elongation of the back waist part is 1000 gf / 25 mm. Excessive force will be applied to the absorbent body 3 and it will not be able to function effectively and the absorbent body 3 will not function effectively. A feeling of wearing comes to be impaired.

  Advantages of disposable paper diapers according to the second pattern are (1) easy attachment of fastening members when worn, (2) effective prevention of backside leakage, and (3) low pressure on the abdomen. is there. That is, since the stress at the time of 50% elongation of the fastening member 6 is set to be smaller than the stress at the time of 50% elongation of the back waist portion, the fastening member 6 can be greatly extended and fastened to a predetermined place. . In addition, it is possible to reduce the burden on the baby's abdomen by setting the expansion / contraction force of the fastening member 6 to be weak, and the back side part is highly fit to the body, thus effectively preventing back side leakage. become able to. Therefore, it can be a disposable disposable diaper particularly suitable for infants or young babies.

[Third pattern]
In this pattern, the stress at the time of 50% elongation of the fastening member is 200 to 1000 gf / 25 mm and the stress at the time of 50% elongation of the back side waist portion is mainly for the purpose of making it difficult for diaper displacement during exercise to occur. The stress at 50% elongation of the fastening member 6 is set to be greater than the stress at 50% elongation of the back waist portion. When the stress of the fastening member 6 is less than 200 gf / 25 mm, the paper diaper is easily displaced on the belly side of the diaper. Even when the stress at the time of 50% elongation of the back waist portion is less than 50 gf / 25 mm, the back of the paper diaper is likely to be displaced. On the other hand, if the stress at the time of 50% elongation of the fastening member 6 exceeds 1000 gf / 25 mm, the burden on the wearer's abdomen becomes strong and the wearing feeling is impaired. On the other hand, if the stress at the time of 50% elongation of the back waist part exceeds 500 gf / 25 mm, an excessive force is applied to the absorbent body 3 and the twist is likely to occur, and the absorbent body 3 cannot function effectively.

  Advantages of disposable paper diapers according to this third pattern are (1) easy to fasten fastening members when worn, (2) improved fit of leg base and abdomen where local body shape changes are seen. The subsequent followability and adhesion are improved, and the effect of preventing misalignment is high. That is, since the stress at the time of 50% elongation of the fastening member is set to be larger than the stress at the time of 50% elongation of the dorsal waist portion, the followability to the baby's movement becomes good and the movement of the body It can be a disposable diaper that does not slip easily. Therefore, it is particularly suitable for a baby who is about 1.5 to 5 years old and can move around actively.

[Expansion allowance of the fastening part and the back waist part]
By the way, as a result of investigations and examinations by the present inventors, it becomes clear that the size of the wearer (baby) around the waist fluctuates by about 20 to 75 mm in the presence or absence of a meal or sitting / high / high movement. It is clear that when the mother or the like wears the disposable diaper, the fastening member 6 is pulled with a force of 200 to 500 gf and is fastened to the front target tape 10 on the stomach side.

  Further, after pulling the fastening member 6 with the above power, it has also been found that the total of the expansion / contraction allowance of the back waist portion and the fastening member 6 is desirably 20 mm or more so as to absorb the wearer's body shape fluctuation. is doing. Accordingly, the total expansion / contraction allowance of the back side waist portion and the fastening member 6 is determined by changing the wearer's body shape after applying appropriate stretching force (the fastening member 6 and the back side waist portion are extended by a certain distance). In order to follow, about 20-75 mm is required as a fluctuation margin, and it is desirable that it is about 40-150 mm. At the same time, the expansion / contraction allowance is set to be larger than about 20 to 75 mm necessary for tracking the body shape change, so that the fastening member 6 can be easily stopped at the target position even when the wearer moves unexpectedly at the time of wearing. Become.

  Furthermore, when there is a difference in stress at the time of elongation between the back waist portion and the fastening member 6 as in the second pattern and the third pattern, the expansion / contraction allowance of the portion where the stress at the time of elongation is small is made larger than the other. Thus, the wearability can be improved.

  In addition, both the back waist part and the fastening member 6 have an elongation rate exceeding 50% (extends exceeding 50%), and at least one of them in terms of wearability and followability to system changes. It is desirable to have an elongation rate exceeding 100%.

[About setting of stress at elongation]
In the first pattern to the third pattern, in consideration of the relationship between the stretchability of the fastening member 6 and the stretchability of the back waist portion, by defining the stress at the time of extension, the baby's age, etc. Although it is intended to improve the wearing feeling and prevent leakage of body fluid, the setting of the stretchability of the fastening member 6 and the stretchability of the back waist part is unambiguous because various factors overlap. It is difficult to make a decision. Therefore, in the case where the set stress at the time of extension is extremely set on the lower limit side and the case where the set stress is set on the upper limit side, the operation will be described including the limitation of numerical values. Therefore, when taking an intermediate value between these numerical ranges, the value is set in consideration of the balance between the two.

  First, regarding the point where the stress at 50% elongation is 50 gf / 25 mm as the lower limit, as described above, the stretching force is too weak and the fitting property is lacking, so that leakage and misalignment of the paper diaper are likely to occur. This is because the upper limit of 50% elongation stress is 1000 gf / 25 mm, as described above, when the feeling of pressure on the abdomen increases or the wearer's body shape changes. This is because, etc. remain.

  In the case of the second pattern and the third pattern, which provide a difference in elongation stress between the fastening member 6 and the back waist portion,

(1) When the elongation stress of one side member is 200 gf / 25 mm or more and the elongation stress of the other side member is less than 200 gf / 25 mm (numerical basis of 200 gf / 25 mm)
Since the stress at the time of extension of the other side member is set lower than the lower limit (200 gf) of the force that the wearer (the person wearing the diaper) pulls the fastening member 6, the expansion / contraction allowance is sufficiently used at the time of wearing, Easy to install. Moreover, since the stress at the time of expansion | extension of one side member is set more strongly than the stress at the time of expansion | extension of the other side member, an expansion / contraction allowance remains after mounting | wearing and can follow a wearer's body shape change. (The emphasis is on wearability).

(2) When the elongation stress of one side member is 500gf / 25mm or more and the other side member is less than 500gf / 25mm (Numerical basis of 500gf / 25mm)
Since the stress on the other side of the member is set lower than the upper limit (500 gf) of the force that the wearer (the person wearing the diaper) pulls the fastening member 6, it can be easily worn using the expansion / contraction allowance at the time of wearing. it can. In addition, since the stress at the time of extension of the one side member is set to be stronger than the stress at the time of extension of the other side member, a sufficient amount of expansion and contraction remains even after wearing, and it can follow the wearer's large body shape well. It becomes possible (the emphasis is placed on the followability after wearing).

It is a partially broken developed view of the paper diaper according to the present invention. It is the II partial enlarged view. 3 is a cross-sectional view of the fastening member 6. FIG. It is a figure which shows the mounting state of the conventional tape type paper diaper.

  DESCRIPTION OF SYMBOLS 1 ... Back sheet nonwoven fabric, 2 ... Liquid-permeable top sheet, 3 ... Absorber, 4 ... Side gather nonwoven fabric, 6 ... Fastening member, 5,7,8 ... Elastic elastic member, 9 ... Waterproof film, 10 ... Front target Tape, 11 ... Hook fastener sheet

Claims (3)

A fastening member that protrudes laterally and has elasticity is provided at both end portions on the back side of the paper diaper, and the paper diaper is attached to the body by fastening the fastening member to the ventral surface of the paper diaper. The elastic elastic members are arranged on the side waist part along the waist direction, so that the back waist part can be stretched in the waist direction, and the side gathered nonwoven fabric made of nonwoven fabric is used on both sides of the paper diaper. A disposable paper diaper in which a three-dimensional gather standing on the side is formed,
The paper diaper has an absorbent body interposed between a liquid-permeable top sheet and a back sheet nonwoven fabric made of a nonwoven fabric and covering the outer surface side of the paper diaper, and at least between the absorbent body and the back sheet nonwoven fabric. A waterproof film is disposed in a range from the ventral side edge to the back side edge, covering the entire area of the absorbent body , and at least on the back side of the paper diaper, the backsheet nonwoven fabric, the waterproof film, and the liquid-permeable topsheet are It is a structure that extends together and has an end flap part that does not have an absorber ,
One or a plurality of elastic elastic members in the back waist part are arranged in the waist direction with respect to the end flap part so that they do not overlap with the fastening members over almost the entire area between the fastening members on both sides. The longitudinal dimension of the diaper in the stretchable region of the back waist part is 25 mm or more,
On both sides of the paper diaper, side flap portions are formed by the backsheet nonwoven fabric and the side gather nonwoven fabric,
The fastening member is composed of an attachment portion to a paper diaper and a fastening main body portion protruding sideways, and the attachment portion to the paper diaper is between a backsheet nonwoven fabric and a gather sheet nonwoven fabric of the side flap portion. fixed Rutotomoni, the arrangement area and the attachment to the disposable diaper of the resilient and elastic members of the back waist section is disposed so as to have a margin overlap in the longitudinal direction of the disposable diaper,
Both the fastening member and the back waist portion have a 50% elongation stress of 50 to 500 gf / 25 mm, and the fastening member 50% elongation stress and the back waist portion 50% elongation stress are substantially the same. Disposable paper diapers characterized by being set to. Disposable diapers according to claim 1 Symbol placement total stretch allowance of the fastening member and the back-side waist portion is 40～150Mm. Wherein among the fastening members and the back-side waist portion, at least one disposable diapers according to any one of claims 1-2, which has an elongation of greater than 100%.

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