JP2009034547A - Disposable paper diaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve both of aesthetic appearance and fitting property of a product. <P>SOLUTION: A disposable paper diaper is formed with a waist opening part WO and left/right leg opening parts LO in a use state; and, a girth part T consisting of a waist part W including a waist opening edge, and a lumbar lower part U extending from the lower end of the waist part W to the leg opening part starting end, has multiple elastic members disposed along the circumferential direction at spaced intervals in the vertical direction, and a semirigid absorbing core extending along the vertical direction to the lumbar lower part. The elastic member is disposed at an interval of 7.0 mm or less over the length of 60% or more of the girth part T, the elastic member of the lumbar lower part U is disposed on the left/right sides excluding the central part of the lumbar lower part U, and the disposition interval of the elastic member of the lumbar lower part U is equal to or shorter than the disposition interval of the elastic member of the waist part W, its thickness is 620 dtex or less and its elongation rate is 150-350%. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a disposable paper diaper, in particular, a waist opening and left and right leg openings are formed in a used state, and at least along the circumferential direction in a waist part of a length range from the waist opening edge to the leg opening start end, and The present invention relates to a disposable paper diaper such as a form having a large number of elastic members spaced in the vertical direction.

In recent years, pants-type disposable paper diapers have been widely used. In this case, the elastic member is usually made of rubber thread, particularly around the waist, and this thread rubber is unevenly distributed on the waist opening edge side of the waist part (the area in the length range from the waist opening edge to the leg opening start end). It arrange | positions to the perimeter of the made area | region, and an arrangement | positioning space | interval is 10 mm or more. Usually, the arrangement interval of the waist opening is small, and the arrangement interval of the lower waist (the crotch side portion from the waist opening) is increased in order to prevent excessive compression of the abdomen.
On the other hand, in order to prevent slipping off when the product is mounted, the thickness of each rubber thread is increased and the contraction force is increased.

  However, the biggest drawback of the conventional one is that it has a bad appearance. That is, in the non-wearing stage, as shown in FIG. 1, wrinkles generated as the rubber thread G contracts occur in a form extending from one to the other of the adjacent rubber threads G, and the uneven wrinkles are formed in the circumferential direction. Generate iteratively. Further, the wrinkles between adjacent thread rubbers G and the wrinkles between adjacent ones of the thread rubbers G are generated in an independent tendency without being continuous.

  These ridges have longer ridges or valleys corresponding to the distance between them, and the pitch of the unevenness in the circumferential direction is larger as the arrangement interval between the rubber threads G is larger. Therefore, since a large wrinkle is randomly generated as a whole on the outer surface of the product, the outer surface of the product becomes “momokomoko”, giving a feeling far away from the pant garment.

  Furthermore, since each thread rubber G is thick and has a large contraction force, for example, when one ridge is taken as an example, the valley on the thread rubber G side of the mountain becomes deep, and the existence of the thread rubber G is clear. Become. In addition, since the peaks or valleys are large and the contraction force acts strongly, complex gavel is randomly generated in the peaks or valleys.

  On the other hand, since the presence of the thick rubber thread G is clear, the consumer has a fear that the wearer's skin will be strongly tightened by the thick rubber thread G, and the willingness to consume is reduced. In fact, it has been found that in the side portions where the absorbent core does not exist, the contraction force of the thick rubber thread G acts strongly, and that portion may remain as rubber marks on the skin. In addition, the sliding of the product is prevented mainly by the friction between the inner surface of the product and the skin at the part where each thread rubber hits the skin, but since the number of thread rubber per unit area is small, the product must have a very large shrinkage force. There is a risk of slipping off.

  Therefore, the main problem of the present invention is that the wrinkles are not noticeable and give a refreshing feeling, that is, the outer surface of the product does not `` mokomoko '' and is a fine wrinkle even if it is visible, and the overall outer surface of the flat surface is It is to provide a disposable paper diaper that is presented and excellent in appearance. Another problem is that the surface is pressed against the skin, so there is no local excessive pressure on the skin, so there is no generation of rubber marks and the friction between the inner surface of the product and the skin as a whole. Furthermore, the close contact makes it possible to provide good fit and prevent the product from slipping off.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
In the state of use, a waist opening and left and right leg openings are formed, and a waist part including a waist opening edge, and a waist part that extends from a lower end of the waist part to a lower end of the leg opening, A disposable paper diaper having a semi-rigid absorbent core having a number of elastic members arranged along the longitudinal direction and spaced apart and extending to the lower waist along the longitudinal direction,
The elastic member is disposed in a state where the distance is 7.0 mm or less over a length range of 60% or more of the waistline portion,
The elastic members of the lower waist are arranged on the left and right side portions excluding the central portion of the lower waist,
The arrangement interval of the elastic members at the lower waist is the same as or shorter than the arrangement interval of the elastic members at the waist, and the thickness is 620 dtex or less, and the elongation rate is 150 to 350%.
A disposable paper diaper characterized by that.

(Function and effect)
In the present invention, the thickness of the elastic member existing over a length range of 60% or more around the trunk of the length range from the waist opening edge to the leg opening start end is set to 620 dtex or less, and the arrangement is set to 7.0 mm or less. The
As a result, as schematically shown in FIG. 2, the generated wrinkles are narrow in the circumferential direction, short in the vertical direction (direction perpendicular to the circumferential direction), and in which the wrinkles are substantially continuous in the vertical direction. Generate with And the concave or convex of each ridge is very small. Moreover, there is almost no constriction at the thread rubber g portion, and it is difficult to determine the presence of the thread rubber g when the color of the sheet constituting the outer surface and the color of the thread rubber g are the same color.

  As a result, even if it is not visible and visible, it is fine with fine grain, and it has a flat outer surface as a whole. Become. And by making it press against the skin as a surface, there is no generation of rubber marks because there is no local excessive pressure on the skin, and the friction between the inner surface of the product and the skin reaches the whole, The close contact provides good fit and prevents the product from falling off.

  When the product is viewed, the conspicuous part is the central part (the central part in the circumferential direction). In this embodiment, the elastic members are present only on the left and right side parts excluding the central part, so that the appearance of the product is excellent.

  Under the configuration in which the semi-rigid absorbent core is arranged along the vertical direction, the elastic members are present only on the left and right side portions excluding the central portion. Since the absorbent core is semi-rigid as compared with the flexible sheet, it is less likely to be deformed or wrinkled by the contraction force transmitted by the elastic member. As a result, the center portion that is conspicuous as a product is not deformed or wrinkled, so that the product is excellent in appearance. In the center of the product, a character design is applied, but this part is not deformed or wrinkled, so that the design can be clearly seen without breaking. In addition, the tightening force in the circumferential direction of the product mainly acts on the side part of the waist part and is attenuated toward the center of the absorbent core by the frictional force with the skin. The tightening force in the direction is small, and the stomach is not over-pressed.

<Invention of Claim 2>
In the use state, a waist opening and left and right leg openings are formed, and a waistline portion including a waist opening edge and a waist portion extending from the lower end of the waist portion to the leg opening start end, along the circumferential direction. A disposable paper diaper having a number of elastic members arranged at intervals in the vertical direction and having a semi-rigid absorbent core extending to the lower waist along the vertical direction,
The elastic member is disposed in a state where the distance is 7.0 mm or less over a length range of 60% or more of the waistline portion,
The elastic members of the lower waist are arranged on the left and right side portions excluding the central portion of the lower waist,
The arrangement interval of the elastic members at the lower waist is the same as or shorter than the arrangement interval of the elastic members at the waist,
The stretching stress and the cross-sectional outer diameter of the stretchable member disposed at the lower waist are smaller than the stretching stress and the cross-sectional outer diameter of the stretchable member disposed at the waist, and the stretch rate is 150 to 350%.
A disposable paper diaper characterized by that.

<Invention of Claim 3>
The disposable paper diaper according to claim 1 or 2, wherein at least a part of the stretchable members arranged at the lower waist is arranged at 5 or more adjacently with an interval of 5.0 mm or less.

<Invention of Claim 4>
An outer sheet that constitutes an outer surface of the product, the outer sheet on which the elastic member is disposed, and an absorbent main body that is fixed to the inner surface side of the outer sheet and has an absorbent core, and at least an intermediate part in the front-rear direction of the crotch part The disposable paper diaper according to any one of claims 1 to 3, wherein a width of the outer sheet is narrower than a width of the absorbent main body.

<Invention of Claim 5>
The disposable paper diaper according to any one of claims 1 to 4, wherein the stretchable member disposed at least in the lower waist is a mesh-like stretchable member composed of a circumferential yarn and a longitudinal yarn.

(Function and effect)
Even if the stretchable member is a mesh-like stretchable member, the same effect is obtained.

<Invention of Claim 6>
The said elastic member is attached with respect to the external sheet which comprises the outer surface of a paper diaper, The color of the external sheet which comprises the said outer surface, and the said elastic member is the same color in any one of Claims 1-5. The disposable disposable diaper described.

(Function and effect)
When there is almost no constriction at the thread rubber portion and the color of the sheet constituting the outer surface and the color of the thread rubber are the same color, it is difficult to determine the presence of the thread rubber.
As a result, even if it is not visible and visible, it is fine with fine grain, and it has a flat outer surface as a whole. Become.

<Invention of Claim 7>
The disposable member according to any one of claims 1 to 6, wherein an extension rate of the elastic member disposed in the lower waist is 150 to 350%, and an extension stress is in a range of 4 to 17 g when 150% is extended. Diapers.

(Function and effect)
When the numerical range is limited, the operational effects in the present invention become clearer.

<Invention of Claim 8>
The elastic member disposed in the waist part of the length range from the waist opening edge to the leg opening start end is a position within 30 mm in the vertical direction from the waist opening edge, and a position within 10 mm from the leg opening start end to the waist opening edge side. The disposable paper diaper according to any one of claims 1 to 7, wherein the disposable paper diaper is attached over a length range up to.

(Function and effect)
When the numerical range is limited, the operational effects in the present invention become clearer.

  As described above, according to the present invention, there is an advantage that the wrinkles are not conspicuous, the appearance of the product is clean, and the fitting property is excellent.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.
Hereinafter, the embodiment of the present invention will be described in detail by first taking an example of a pants-type disposable diaper, and then when the diaper is used (when worn), the left and right sides on the back side are brought into the left and right sides on the abdomen. An example of application to a so-called tape-type paper diaper of a type in which a tape fastener (including an adhesive tape fastener and a hook-and-loop fastener) is joined will also be described.

("Explanation of terms of the present invention" and a first embodiment of a pants-type disposable diaper)
The pants-type disposable diaper according to the first embodiment will be described with reference to FIG. 4 and FIG. 5 while explaining the terms related to the site and direction of the present invention mainly with reference to FIG.
As shown in FIGS. 3 and 4, the pants-type disposable diaper according to the first embodiment is fixed to the flexible outer sheet 1 and the inner surface of the outer sheet 1, and has a longitudinal direction centered on the crotch 4 ( The main component is an absorption main body 10 extending in the front-rear direction.

  The outer sheet 1 is formed by laminating and fixing two or three or more breathable / water-repellent nonwoven fabrics. At the final stage of the manufacturing process after the outer sheet 1 and the absorbent main body 10 are superposed, By joining the entire longitudinal direction of both side edges with the back body B by means such as ultrasonic sealing or heat melting (this joint is denoted by reference numeral 30), a waist opening as shown in FIG. WO and a pair of left and right leg openings LO are formed.

  In the code | symbol of FIG. 3, "vertical direction" means the direction which connects an abdominal side and a back side, and "circumferential direction" means the direction orthogonal to the said vertical direction. “Waist opening edge” means the edge of the waist opening WO, and “Leg opening edge” means the edge of the leg opening LO. The “leg opening start end” means a position where the leg opening edge of the leg opening LO intersects with the joint portion 30, and means a starting position of the leg opening edge. "Torso circumference part" T means the whole area | region of the length range from a waist opening edge to a leg opening start end. The waistline portion T can be conceptually divided into a “waist portion” W and a “lower waist” U. These longitudinal lengths vary depending on the size of the product, but the waist portion W is 15 to 40 mm and the lower waist portion U is 65 to 120 mm. “Crotch” L means the entire region of the length range that forms the leg opening LO. Further, the “center portion” means an intermediate region excluding the side portion including the center line of the product. The “side portions” mean both side portions of the waistline portion T.

  As shown in FIG. 5, the absorbent main body 10 is mainly composed of a rectangular liquid-permeable top sheet 11 made of a nonwoven fabric or the like that directly touches the wearer's skin and cotton-like pulp, and has a certain degree of rigidity (semi-rigid). ) Absorber AB composed of a rectangular absorbent core 13 and a rectangular crepe paper 14 wrapped around the upper and lower surfaces thereof, and a rectangle composed of a polyethylene plastic film etc. reaching the vicinity of both side edges on the back surface of the absorber AB. The liquid-permeable top sheet 11 wraps around the side edges of the absorber AB and reaches the back surface, and is superimposed on the liquid-impermeable back sheet 12. These elements are integrated by bonding with a hot-melt adhesive (indicated by * in the figure is the bonding portion). If necessary, a liquid-permeable second sheet 11S can be interposed between the liquid-permeable top sheet 11 and the crepe paper 14 as illustrated. The absorbent main body 10 is integrated by adhering the entire back surface to the outer sheet 1 with a hot melt adhesive.

  Standing cuffs C and C around the legs projecting to the use surface side are formed on both sides of the absorbent main body 10, respectively. The standing cuffs C include a standing sheet 40 that is substantially continuous in the width direction, an elastic member, for example, It is composed of one elastic rubber member 50, 50 ... as shown in the figure.

  In more detail, the standing cuff C is formed by doubling the standing sheet 40 and wrapping each of the elastic members 50, 50... With a hot melt adhesive or the like. The standing sheet 40 forming each standing cuff C, C is preferably not liquid-permeable but liquid-permeable or hydrophobic. Moreover, you may make it become a property which repels a liquid by a silicon process etc. with respect to liquid-permeable sheets, such as a nonwoven fabric. Furthermore, it is desirable to have air permeability or vapor permeability.

The inner surfaces of the double upright sheets 40 go around the back surfaces of the absorber AB and the liquid-impermeable back sheet 12 and are fixed by a hot melt adhesive or the like. As a result, the fixed start end of the double upright sheet 40 forms the upright end of the upright cuff C.
The tip side from the standing end is a free part that is not fixed to the product body.

  On the other hand, at the front and rear end portions in the longitudinal direction, the free portion is fixed to the article, specifically to the outer surface of the liquid-permeable top sheet 11, with the tip thereof toward the center side of the article by hot melt adhesive or the like. Yes.

  Further, the basic configuration is that at least one of the elastic members 50, 50... Is in the free part, but in particular, the elastic member 50 is preferably at the tip of the free part, and is further shown in FIG. As shown, it is preferable to have the elastic member 50 also on the base side. It is further desirable to have a plurality of tip portions as shown in the figure.

  FIG. 4 shows a state in which the paper diaper is expanded in the longitudinal direction. When the paper diaper is attached, the paper diaper is attached to the body in a boat shape, and the contraction force of each of the elastic members 50, 50. The standing cuff C is erected by the contraction force of each of the elastic members 50, 50. At this time, the side portion of the absorbent main body 10 is deformed and lifted, and the absorbent core 13 is also slightly lifted while being deformed to form a deep pocket space.

  The space surrounded by the left and right standing cuffs C, C forms a urine or soft stool confinement space. When urinating into this space, the urine is absorbed into the absorbent body AB through the liquid-permeable top sheet 11, and the standing cuff C becomes a barrier for the solid matter of loose stool, and the overpass is prevented. The

  On the other hand, at the longitudinal ends of the front body F and the back body B, between the nonwoven fabrics of the outer sheet 1 in the waist W, the gap is parallel to the edge of the waist opening WO in order to enhance the fit around the waist. The waist elastic members 20F and 20B made of thin thread rubber are placed and fixed under extension so that they extend. Although the space | interval and the number of waist elastic members 20F and 20B in the waist part W can be determined suitably, for example, about 4-8 mm is preferable as an interval, and about 4-10 is preferable as the number.

  And under such a configuration, the lower abdomen of the front body F and the buttocks of the back body B in the lower waist U which is the region between the waist part W and the crotch L of the front body F and the back body B according to the present invention, Lower waist elastic members 21F and 21B are provided along the circumferential direction. The lower waist elastic members 21F and 21B are the left and right sides of the product excluding almost the entire absorbent core 13 in the part from the joint part 30 on one side to the joint part 30 on the other side in the front body F and the back body B, respectively. It is provided on the side.

  In the illustrated example, as the lower waist elastic members 21F and 21B, thin rubber threads, specifically, elastic members having a thickness of 620 dtex or less are used. In both the front body F and the back body B, the vertical spacing is provided. Is set to 7.0 mm or less, and 15 to 40 pieces are arranged and fixed between the nonwoven fabrics of the outer sheet 1 in parallel. The mutual interval between the lower waist elastic members 21F and 21B is preferably the same as or shorter than the interval between the waist elastic members 20F and 20B.

  Further, the rubber thread used as the lower waist elastic members 21F and 21B has a tensile stress and a cross-sectional outer diameter smaller than or substantially the same as the thin rubber rubber used as the waist elastic members 20F and 20B. It can be. As the thin rubber thread used here, specifically, one having a tensile stress in the range of 4 to 17 g, particularly in the range of 5 to 10 g at 150% elongation is preferably used.

  On the other hand, in the first embodiment, the crotch elastic member 23 is also provided in the left and right parts excluding the central part in the crotch part L. As for the crotch elastic member 23, similarly to the lower waist elastic members 21F and 21B, an elastic member having a thickness of 620 dtex or less can be disposed and fixed between the nonwoven fabrics with a vertical interval of 7.0 mm or less.

(Second embodiment of a pants-type disposable diaper)
The second embodiment shown in FIGS. 7 and 8 is different from the first embodiment in that the crotch L is not provided with the crotch elastic member 23, and the lower waist elastic members 21F and 21B are absorbent. 10 is arranged and fixed between the nonwoven fabrics continuously in the circumferential direction across 10.

(Third embodiment of a pants-type disposable diaper)
FIG. 9 is different from the first embodiment in that the crotch portion L is not provided with the crotch elastic member 23, and the waist elastic members 20F and 20B are not provided in the center but only on the side portions. FIG. 4 shows a structure in a developed state similar to FIG. 3. FIG. 10 shows the state of use.

(Fourth embodiment of a pants-type disposable diaper)
In FIG. 11, the outer shape sheet 1 is configured by a center sheet 1A in the width direction and side sheets 1B and 1B on both sides, and thread rubber is fixed in a mesh shape, for example, a lattice shape, between the nonwoven fabrics as the side sheets 1B and 1B. Things are used. Then, the side sheets 1B and 1B on both sides are joined to the center sheet 1A in the width direction, and the side sheets 1B and 1B are expanded and contracted in the circumferential direction and the front-rear direction. In this case, the rubber thread in the circumferential direction forms elastic members for the waist part W and the lower waist part U.

(Supplementary explanation about each form of pants-type disposable diapers and other embodiments)
The above first to fourth embodiments are conceptually summarized as shown in (A) to (D) of FIG. As can be estimated by comparing these, the waist elastic members 20F and 20B and the lower waist elastic members 21F and 21B are arranged and fixed continuously in the circumferential direction across the absorbent main body 10, and the absorbent core 13 It is possible to selectively take a form in which the arrangement is fixed only at the left and right side portions of the product, which does not exist in the central portion where the product is located. Further, the presence or absence of the crotch elastic member 23 can be selected. Furthermore, the arrangement | positioning form of an expansion-contraction member can also be made to differ between the front body F and the back body B. FIG. Therefore, as shown in FIG. 12E as another embodiment, the waist elastic members 20F and 20B and the lower waist elastic members 21F and 21B are not present in the central portion where the absorbent core 13 is located. Waist elastic members 20F and 20B, and lower waist as shown in FIG. 12 (F) as another embodiment in which the arrangement is fixed only on the left and right side parts of the product and the crotch elastic member 23 is not provided. A configuration in which the elastic members 21F and 21B do not exist in the central portion where the absorbent core 13 is located, is arranged and fixed only at the left and right side portions of the product, and a crotch elastic member 23 is provided. Thus, it is added that the arrangement form of the elastic members is appropriate. When the lower waist elastic member 21F, 21B or the crotch elastic member 23 does not exist in the central portion where the absorbent core 13 is located and is arranged and fixed only on the left and right side portions of the product, the lower waist elastic member 21F , 21B end, or the case where the end of the crotch elastic member 23 overlaps the side edge of the absorbent core 13 and the case where the end does not reach the side edge of the absorbent core 13 and is separated.

  In the above example, the rectangular absorbent main body 10 is joined to the substantially hourglass-shaped outer sheet 1, but a liquid-permeable top sheet 11 having the same shape as the outer sheet 1 is provided, and the absorbent body AB is interposed between them. May be provided. Furthermore, the external sheet 1 and the absorbent main body 10 may be integrated with no boundary.

  In the above example, the sheet constituting the outer surface of the product is obtained by laminating and fixing two or more breathable / water-repellent nonwoven fabrics, but it may be a single nonwoven fabric, in which case the nonwoven fabric is used. An elastic member can be joined to the side. Furthermore, a plastic sheet can be interposed between the laminated nonwoven fabrics, or can be bonded to the use surface side of the backside nonwoven fabric.

  The lower waist elastic member 21F or the lower waist elastic member 21B may be arranged in a lattice network. One example of this is the form shown in FIG. Even in this type of configuration, the elastic elastic member has an interval in the longitudinal direction defined by the present invention.

  Further, according to the present invention, at least the waist elastic member 20F and the lower waist elastic member 21F of the front body F are 60% or more, preferably 70% or more of the waist part T in the length range from the waist opening edge to the leg opening start end. More preferably, as long as it exists over a length range of 90% or more, it is sufficient to have the prescribed thickness and interval. Therefore, in the maximum 40% region, the lower waist elastic member 21F is defined by the present invention. Even if it does not have the thickness or interval to be used, the overall clean feeling is not impaired.

  More specifically, as shown in an enlarged view in FIG. 13, the length a of the waist elastic members 20F, 20F... With a spacing of 7 mm or less and the arrangement of the lower waist elastic members 21F, 21F. The ratio of the total length of the length ranges b and c of 7 mm or less to the length of the waist portion T (ie, (a + b + c) / T) is 60% or more, excluding the length range portion exceeding 7 mm. It prescribes that there is.

  On the other hand, as shown in FIG. 14, a design such as a character can be applied on the back side of the liquid-impermeable back sheet 12 by, for example, printing, in the center of the product (substantially the entire area of the absorbent core). This design portion has an absorption core 13 having a certain degree of rigidity, and the outer shape sheet 1 does not deform or cause wrinkles according to the present invention, so that the design can be clearly seen without breaking. It becomes. Also, as shown in FIG. 14, if the front and back of the character are applied corresponding to the front and back of the product, anyone can distinguish the front and back at a glance, making changing diapers fun and pleasing to the wearer. It will be a thing. A design design sheet that has been designed may be interposed between outer sheets. In addition, design printing can be performed on the outer sheet 1.

By the way, in order to fit the crotch part or the crotch part, the outer sheet 1 can be provided with an elastic member in various forms.
In FIG. 15, the crotch elastic members 24, 24 are fixed between the nonwoven fabrics of the outer sheet 1 from the end of the front side to the end of the back side almost parallel to the leg opening edge of the crotch L. Is. In this embodiment, the crotch elastic member 24 contracts the leg opening LO to prevent the leakage of body fluid. In order to clearly indicate the crotch elastic members 24, 24, the absorbent main body 10 is indicated by a virtual line.

  FIG. 16 shows the crotch and crotch elastic members 25F, extending from the end of the left side part to the end of the right side part so as to cross the crotch part in the front body F and the back body B, respectively. 25B is fixed between the nonwoven fabrics of the outer sheet 1. Further, in this example, the crotch / crotch lower part elastic members 25F and 25B on the front body F side and the back body B side partially intersect.

  FIG. 17 shows the front and rear body parts F and 26B extending from the left side part to the right side part so as to cross the crotch part. 26B is fixed between the nonwoven fabrics of the outer sheet 1. In this example, the crotch / crotch elastic members 26F and 26B are parallel to each other in the crotch without intersecting.

  On the other hand, as shown in FIG. 18, the width of the outer sheet 1 may be narrower than the width of the absorbent main body 10, particularly the absorbent core 13, in the crotch portion. In the form of FIG. 18 and the above-described form, the outer shape sheet 1 that protrudes outward from the side edge of the absorbent core 13 tends to flicker, which is a problem when trying to obtain a clean feeling for the entire product. Therefore, similarly to the crotch elastic member 23 of the first form, the shaping elastic member 27 is provided between the nonwoven fabrics of the outer sheet 1 on both sides of the crotch L, and the protruding outer sheet 1 is moved to the center side. The feeling of fluttering can be eliminated. In this case, the outer end portion of the shaping elastic member 27 group is fixed by the seal line 28 made of hot melt adhesive, thereby preventing the outer end portion of the shaping elastic member 27 group from being pulled into the center side.

  Similarly, in order to eliminate the flickering feeling in FIG. 19, in the front body F and the back body B, from the end of the left side to the end of the right side so as to cross the crotch, The shaping elastic members 29 and 29 are respectively fixed between the nonwoven fabrics of the outer sheet 1. In this form, the intermediate circumferential direction portion of the shaping elastic member 29 moves the outer sheet 1 that protrudes outward from the side edge of the absorbent core 13 to the center side, so that the flickering feeling can be eliminated, Since the end part of the shaping elastic member 29 extends to the end part of the side part, it acts to lift the crotch part toward the waist part T side, and the slackness of the abdomen and buttocks is eliminated, resulting in a more refreshing feeling.

(First embodiment of tape-type paper diaper)
As described above, the present invention covers not only pants-type disposable diapers but also tape-type paper diapers. This first embodiment is shown in FIGS. In this example, upright sheets 41, 41 are provided on both sides, and elastic members 51, 51 are provided at the distal end portions of these free upright portions to constitute upright cuffs C, C. The standing sheet 41 is joined to the back sheet 1 similar to the outer sheet. 42 is a tape fastener for bringing the left and right sides on the back side into the left and right sides on the abdomen and joining them. In this example, between the nonwoven fabrics of the outer sheet (back sheet) 1 in the waist W at the longitudinal ends of the front body F and the back body B, in order to improve the fit around the waist, the waist opening WO Waist elastic members 20F and 20B made of thin rubber thread are arranged and fixed under extension so as to expand and contract with an interval parallel to the edge. Further, lower waist elastic members 21F and 21B are provided along the circumferential direction on the side of the lower abdomen of the front body F and the buttocks of the rear body B except for the central part.

(Second embodiment of tape-type paper diaper)
A second embodiment is shown in FIGS. This form is an example which does not have a standing cuff. And the elastic members 52 and 52 are being fixed between the liquid-permeable top sheet 11 and the back seat | sheet 12 along the vertical direction at the flap part of the outer side of the absorption core 13. As shown in FIG. Also in this example, waist elastic members 20F and 20B and lower waist elastic members 21F and 21B are provided.

(About elastic members)
As the elastic member, in addition to materials such as natural rubber and synthetic rubber, elastic elastic materials such as urethane can be used. A thin elastic band or a sheet having a large area can also be used. Examples of these include a band such as urethane, a film or a sheet. A non-porous film or a perforated film can be selected as the film, and a mesh-like sheet can be selected as the sheet. An arrangement example of the non-porous film 60 is shown in FIG. Moreover, the example of arrangement | positioning of the mesh-like film 61 was shown in FIG. Also in these forms, it is important that the region where the elastic member is attached to the outer sheet 1 of the product exists over a length range of 60% or more of the waist portion.

(Example)
Table 1 shows the state of wrinkles generated on the outer surface of the obtained product after variously changing the thickness and arrangement interval of the elastic members at the lower waist.

  From this result, both the thickness of the elastic member and the vertical spacing are involved in the generation of wrinkles, and even if the wrinkles are generated only in the range specified in the present invention, they have a fine grain and an excellent appearance. It can be seen that

Other reference examples and their effects are shown below.
<Reference Example 1>
In use, a waist opening and left and right leg openings are formed, and at least a number of lengths around the waist extending from the waist opening edge to the leg opening start end along the circumferential direction and having a number of intervals in the vertical direction. A disposable paper diaper having an elastic member,
At least in the front body, a region where the elastic member having a thickness of 620 dtex or less is attached to a sheet constituting the outer surface of the product in a state where the distance is 7.0 mm or less is 60% of the waist portion. % Over a length range of over,
A disposable paper diaper characterized by that.

(Function and effect)
In this reference example, the thickness of the stretchable member existing over a length range of 60% or more around the waist of the length range from the waist opening edge to the leg opening start end is set to 620 dtex or less, and the arrangement is 7.0 mm or less. Is done.
As a result, as schematically shown in FIG. 2, the generated wrinkles are narrow in the circumferential direction, short in the vertical direction (direction perpendicular to the circumferential direction), and in which the wrinkles are substantially continuous in the vertical direction. Generate with And the concave or convex of each ridge is very small. Moreover, there is almost no constriction at the thread rubber g portion, and it is difficult to determine the presence of the thread rubber g when the color of the sheet constituting the outer surface and the color of the thread rubber g are the same color.

  As a result, even if it is not visible and visible, it is fine with fine grain, and it has a flat outer surface as a whole. Become. And by making it press against the skin as a surface, there is no generation of rubber marks because there is no local excessive pressure on the skin, and the friction between the inner surface of the product and the skin reaches the whole, The close contact provides good fit and prevents the product from falling off.

<Reference Example 2>
In use, a waist opening and left and right leg openings are formed, and at least a number of lengths around the waist extending from the waist opening edge to the leg opening start end along the circumferential direction and having a number of intervals in the vertical direction. A disposable paper diaper having an elastic member,
At least in the front body, a region where the elastic member having a thickness of 620 dtex or less is attached to a sheet constituting the outer surface of the product in a state where the distance is 7.0 mm or less is 60% of the waist portion. % Over the length range and exists only on the left and right sides excluding the center,
A disposable paper diaper characterized by that.

(Function and effect)
When the product is viewed, the conspicuous part is the central part (the central part in the circumferential direction). In this embodiment, the elastic members are present only on the left and right side parts excluding the central part, so that the appearance of the product is excellent.

<Reference Example 3>
In use, a waist opening and left and right leg openings are formed, and at least a number of lengths around the waist extending from the waist opening edge to the leg opening start end along the circumferential direction and having a number of intervals in the vertical direction. A disposable paper diaper having an elastic member and having a semi-rigid absorbent core along the longitudinal direction,
At least in the front body, a region where the elastic member having a thickness of 620 dtex or less is attached to a sheet constituting the outer surface of the product in a state where the distance is 7.0 mm or less is 60% of the waist portion. % Over the length range and exists only on the left and right sides excluding the center,
A disposable paper diaper characterized by that.

(Function and effect)
Under the configuration in which the semi-rigid absorbent core is arranged along the vertical direction, the elastic members are present only on the left and right side portions excluding the central portion. Since the absorbent core is semi-rigid compared to a flexible sheet, it is less likely to be deformed or wrinkled due to the transmission of contraction force by the elastic member. As a result, the center portion that is conspicuous as a product is not deformed or wrinkled, so that the product is excellent in appearance. In the center of the product, a character design is applied, but this part is not deformed or wrinkled, so that the design can be clearly seen without breaking. In addition, the tightening force in the circumferential direction of the product mainly acts on the side part of the waist part and is attenuated toward the center of the absorbent core by the frictional force with the skin. The tightening force in the direction is small, and the stomach is not over-pressed.

<Reference Example 4>
In use, a waist opening and left and right leg openings are formed, and at least a number of lengths around the waist extending from the waist opening edge to the leg opening start end along the circumferential direction and having a number of intervals in the vertical direction. A disposable paper diaper having an elastic member,
At least in the front body, a region where the elastic member having a thickness of 620 dtex or less is attached to a sheet constituting the outer surface of the product in a state where the distance is 7.0 mm or less is 60% of the waist portion. % Over the length range and only in the left and right side portions excluding the central portion, and only in the left and right portions excluding the central portion of the crotch portion of the length range forming the leg opening,
A disposable paper diaper characterized by that.

(Function and effect)
By providing elastic members in the left and right parts except the center part of the crotch part, the left and right parts of the sheet constituting the outer surface of the product do not peel off and fit toward the wearer's skin and look good Become.

<Reference Example 5>
An absorbent main body having an absorbent core is disposed over the front body and the back body on the inner surface side of the outer sheet composed of a plurality of layers constituting the outer surface of the product, and a waist opening and left and right leg openings are formed in use, at least A disposable paper diaper having a number of elastic members along the circumferential direction and in the longitudinal direction at the waist circumference of the length range from the waist opening edge to the leg opening starting end,
At least in the front body, a region where the elastic member having a thickness of 620 dtex or less is attached to a sheet constituting the outer surface of the product in a state where the distance is 7.0 mm or less is 60% of the waist portion. % Over a range of lengths,
A disposable paper diaper characterized by that.

(Function and effect)
The outer surface of the product can be constituted by a multi-layer outer sheet, and an absorbent main body having an absorbent core can be arranged on the inner surface side of the front body and the back body.

<Reference Example 6>
The disposable diaper according to any one of Reference Example 1 to Reference Example 5, in which the stretch rate of the stretchable member is 150 to 350%, and the stretch stress is in the range of 4 to 17 g when stretched by 150%.

(Function and effect)
When the numerical range is limited, the operational effects in Reference Examples 1 to 5 are further clarified.

<Reference Example 7>
Among the waist part of the length range from the waist opening edge to the leg opening start edge, the elastic member is located at a position within 30 mm in the vertical direction from the waist opening edge to a position within 10 mm on the waist opening edge side from the leg opening start edge. The disposable paper diaper according to any one of Reference Examples 1 to 6, which is attached over a length range.

(Function and effect)
When the numerical range is limited, the operational effects in Reference Examples 1 to 6 are further clarified.

<Reference Example 8>
The disposable paper diaper according to any one of Reference Examples 1 to 7, in which five or more elastic members having a thickness of 620 dtex or less are arranged adjacent to each other with an interval of 7.0 mm or less.

(Function and effect)
When five or more elastic members are arranged adjacent to each other, the flattened region is clarified, and the effects in Reference Examples 1 to 7 are further clarified.

<Reference Example 9>
A disposable paper diaper having a waist opening and left and right leg openings in use, and having an elastic member along a circumferential direction at least in a waist part extending from the waist opening edge to the leg opening start end. ,
The stretchable member is a mesh-like stretchable member, and at least in the front body, the area where the mesh-like stretchable member is attached to the sheet constituting the outer surface of the product has a length range of 60% or more of the waist portion. Exist over the
A disposable paper diaper characterized by that.

(Function and effect)
Even if the stretchable member is a mesh-like stretchable member, the same effect is obtained.

<Reference Example 10>
A disposable paper diaper having a waist opening and left and right leg openings in use, and having an elastic member along a circumferential direction at least in a waist part extending from the waist opening edge to the leg opening start end. ,
The stretchable member is a non-porous or perforated film-like stretchable member, and at least in the front body, the region where the film-like stretchable member is attached to the sheet constituting the outer surface of the product is the waistline portion. Exists over a length range of 60% or more,
A disposable paper diaper characterized by that.

(Function and effect)
A non-porous or perforated film-like elastic member can be used as the elastic member.

It is a generation | occurrence | production situation schematic diagram of the conventional product. It is a generation | occurrence | production status schematic diagram of the wrinkle of this invention product. It is a top view from the expansion | deployment state use surface side of 1st Embodiment for the vocabulary description of this invention. It is a top view from the deployment state use surface side of a 1st embodiment. It is the 5-5 line arrow directional view. It is a perspective view of 1st Embodiment product. It is a top view from the deployment state use surface side of a 2nd embodiment. It is a perspective view of 2nd Embodiment product. It is a top view from the deployment state use surface side of a 3rd embodiment. It is a perspective view of 3rd Embodiment product. It is a top view from the deployment state use surface side of a 4th embodiment. It is explanatory drawing of the arrangement | positioning form of an expansion-contraction member. It is explanatory drawing regarding the arrangement | positioning ratio of an expansion-contraction member. It is a figure which shows the example of a design of the front and back of a product. It is a top view from the deployment state use surface side of another embodiment. It is a top view from the deployment state use surface side of other embodiments. It is a top view from the expansion | deployment state use surface side of another embodiment. It is a top view from the expansion | deployment state use surface side of the form which provided the shaping expansion-contraction member. It is a top view from the expansion state use surface side of another form which provided the shaping expansion-contraction member. It is a top view from the expansion | deployment state use surface side of 1st Embodiment of a tape-type paper diaper. It is a 5-5 line equivalent position arrow line view. It is a top view from the expansion | deployment state use surface side of 2nd Embodiment of a tape-type paper diaper. It is a 5-5 line equivalent position arrow line view. It is a top view from the expansion | deployment state use surface side of embodiment provided with another expansion-contraction member. It is a top view from the expansion | deployment state use surface side of embodiment provided with the other expansion-contraction member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Outer sheet, 4 ... Inseam, 10 ... Absorption main body, 12 ... Back sheet, 13 ... Absorption core, AB ... Absorber, C ... Barrier cuff, 20F, 20B ... Waist elastic member, 21F, 21B ... Lower waist elastic member , 23 ... Crotch elastic member, T ... waist circumference, U ... lower waist, L ... crotch, W ... waist, WO ... waist opening, LO ... leg opening.

Claims (8)

In the state of use, a waist opening and left and right leg openings are formed, and a waist part including a waist opening edge, and a waist part that extends from a lower end of the waist part to a lower end of the leg opening, A disposable paper diaper having a semi-rigid absorbent core having a number of elastic members arranged along the longitudinal direction and spaced apart and extending to the lower waist along the longitudinal direction,
The elastic member is disposed in a state where the distance is 7.0 mm or less over a length range of 60% or more of the waistline portion,
The elastic members of the lower waist are arranged on the left and right side portions excluding the central portion of the lower waist,
The arrangement interval of the elastic members at the lower waist is the same as or shorter than the arrangement interval of the elastic members at the waist, and the thickness is 620 dtex or less, and the elongation rate is 150 to 350%.
A disposable paper diaper characterized by that. In the use state, a waist opening and left and right leg openings are formed, and a waistline portion including a waist opening edge and a waist portion extending from the lower end of the waist portion to the leg opening start end, along the circumferential direction. A disposable paper diaper having a number of elastic members arranged at intervals in the vertical direction and having a semi-rigid absorbent core extending to the lower waist along the vertical direction,
The elastic member is disposed in a state where the distance is 7.0 mm or less over a length range of 60% or more of the waistline portion,
The elastic members of the lower waist are arranged on the left and right side portions excluding the central portion of the lower waist,
The arrangement interval of the elastic members at the lower waist is the same as or shorter than the arrangement interval of the elastic members at the waist,
The stretching stress and the cross-sectional outer diameter of the stretchable member disposed at the lower waist are smaller than the stretching stress and the cross-sectional outer diameter of the stretchable member disposed at the waist, and the stretch rate is 150 to 350%.
A disposable paper diaper characterized by that.   The disposable paper diaper according to claim 1 or 2, wherein at least a part of the stretchable members arranged at the lower waist is arranged at 5 or more adjacently with an interval of 5.0 mm or less.   An outer sheet that constitutes an outer surface of the product, the outer sheet on which the elastic member is disposed, and an absorbent main body that is fixed to the inner surface side of the outer sheet and has an absorbent core, and at least an intermediate part in the front-rear direction of the crotch part The disposable paper diaper according to any one of claims 1 to 3, wherein a width of the outer sheet is narrower than a width of the absorbent main body.   The disposable paper diaper according to any one of claims 1 to 4, wherein the stretchable member disposed at least in the lower waist is a mesh-like stretchable member composed of a circumferential yarn and a longitudinal yarn.   The said elastic member is attached with respect to the external sheet which comprises the outer surface of a paper diaper, The color of the external sheet which comprises the said outer surface, and the said elastic member is the same color in any one of Claims 1-5. The disposable disposable diaper described.   The disposable member according to any one of claims 1 to 6, wherein an extension rate of the elastic member disposed in the lower waist is 150 to 350%, and an extension stress is in a range of 4 to 17 g when 150% is extended. Diapers.   The elastic member disposed in the waist part of the length range from the waist opening edge to the leg opening start end is a position within 30 mm in the vertical direction from the waist opening edge, and a position within 10 mm from the leg opening start end to the waist opening edge side. The disposable paper diaper according to any one of claims 1 to 7, wherein the disposable paper diaper is attached over a length range up to.

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