JP6532235B2 - Pants type disposable diaper - Google Patents

Description

  The present invention relates to a pants-type disposable diaper.

  In the pants-type disposable diaper, an elastic stretchable material is used around the waist to fit the wearer's body shape. As an elastic stretchable material to be used, in addition to elastic stretchable members such as thread rubber, non-woven fabrics and films having elastic stretchability also exist.

  However, the wearer of the diaper may have a swollen belly, and in particular, a child and the like may often move around without worrying about the diaper being slipped or the like in addition to the belly being swollen. Therefore, even if the elastic stretchable material is used around the waist, when the wearer moves around or excretes, the belly of the diaper may slip off. If this slippage is left as it is, the entire diaper slips off, which is not only bad in appearance but also causes leakage.

  In this respect, in order to prevent slippage, it is conceivable to strengthen the stretchability of the elastic stretchable material around the waist, but if the stretchability of the elastic stretchable material is strengthened, marks or rashes on the wearer's skin may occur. It causes it to occur. With regard to this point and rash, it has also been proposed to form vents by cutting out both sides of an exterior body (exterior sheet) forming a front body or a rear view, and thereby to prevent stuffiness (for example, patent documents 1, Patent Document 2 etc.). However, if the stretchability of the elastic elastic material around the waist is increased to prevent slippage, the air permeability does not improve so much, and it is impossible to prevent marking.

JP, 2006-314771, A JP, 2012-232102, A

  Therefore, a main object of the present invention is to provide a pants-type disposable diaper capable of preventing slippage without causing marks or blurring on the skin of a wearer.

The present invention which solved the above-mentioned subject is as follows.
< Reference Invention>
A side seal portion is formed by joining the both sides of the exterior body forming the front body extending from the crotch to the ventral side and the both sides of the exterior body forming the back body extending from the crotch to the back A pants-type disposable diaper having a waist opening for passing a trunk of a wearer and a pair of left and right leg openings for passing a leg, and an interior body including an absorber inside the exterior body. And
A longitudinal direction region having the side seal portion of at least one of the exterior body forming the front body and the exterior body forming the rear body is configured to elastically stretch in the width direction.
And a shift preventing opening is provided in the iliac crest abutting region which is the longitudinal direction region and abuts against the iliac crest region of the wearer.
Pants type disposable diaper characterized by.

(Action effect)
A longitudinal region having a side seal portion of at least one of the exterior body forming the front body and the exterior body forming the back body is configured to be elastically stretchable in the width direction, and the vertical area If the shift stop is provided in the iliac crest contact area that abuts on the iliac crest area of the wearer, the iliac crest area of the wearer fits in the shift stop and the shift is stopped The exterior body on the side of the waist opening from the opening is caught in the iliac crest region of the wearer. That is, for example, when the trouser is tightened and the belt is tightened, the belted portion of the trouser is caught on the iliac crest region of the wearer, which is in the same state as the trouser does not slip off. Therefore, the slippage of the diaper can be prevented without increasing the elastic stretchability in the longitudinal direction area.

<Invention according to claim 1>
In the above reference invention,
A cutout is formed in the exterior body forming the front body, and the cutout serves as the anti-slip opening.
The anti-slip opening has an elongated shape having a longitudinal direction and a width direction,
The crotch side is inclined to the ventral side, and the waist side is inclined to the dorsal side,
Pants type disposable diaper characterized by.
(Action effect)
A pant type disposable diaper in which a cutout is formed in an outer body forming a front body and this cutout is a gap preventing opening can be obtained without changing the manufacturing process of the side seal portion while having the above-mentioned operation and effect. it can.
The slippage of the diaper can be more reliably prevented if the slippage prevention opening has an elongated shape having a longitudinal direction and a width direction, and the crotch side is inclined to the ventral side and the waist side is inclined to the dorsal side.
<Invention according to claim 2>
The tensile force during elastic deformation in the width direction of the exterior body forming the front body is 3.0 to 16.0 N,
And, the longitudinal length of the shift preventing opening is 20 to 80 mm,
The pants-type disposable diaper according to claim 1.

(Action effect)
If the tensile force during elastic deformation in the width direction of the exterior body that forms the front body is 3.0 to 16.0 N, and the longitudinal length of the slippage prevention opening is 20 to 80 mm, the elastic stretch force The slippage of the diaper can be reliably prevented while restraining the area of the diaper to a range that does not cause marks or blurring on the wearer's skin.

< Second invention to be a reference >
In the above reference invention,
The outer body forming the front body is formed with notches extending from both sides toward the center in the width direction, and the notches serve as the anti-slip opening.
Pas Ntsutaipu disposable diapers.

(Action effect)
The underpants type disposable diaper in which the notch which extends toward the cross direction center from the both sides is formed in the exterior body which makes the front body, and this notch is made into the gap prevention opening has the above-mentioned effect. Can be obtained without changing the manufacturing process of the side seal portion.

<Invention according to claim 3 >
In the above reference invention,
In the longitudinal direction region having the side seal portion of the exterior body, (the width of the exterior body forming the front body) <(the width of the exterior body forming the rear body),
Further, in the side seal portion, at least a part of the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or is not attached at the time of attachment.
When the attaching / detaching portion is opened at the time of the attachment, the anti-slip opening portion is formed.
Pants type disposable diaper characterized by .

(Action effect)
In the longitudinal region having the side seal portion of the exterior body, (the width of the exterior body forming the front body) <(width of the exterior body forming the back body), the side seal portion becomes the front body at the time of wearing Located on the ventral side. Therefore, in the side seal portion, at least a partial region in the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or a non-bonding portion at the time of mounting. When the opening is configured to be the slippage preventing opening, the above-described effects can be obtained only by changing the bonding method of the side seal portion without providing a new manufacturing step such as a cutting step or a notching step. be able to.

<Invention according to claim 4 >
In the above reference invention,
In the longitudinal direction region having the side seal portion of the exterior body, ((tensile force during elastic deformation of exterior body forming the front body))> (tension during elastic deformation of the exterior body forming the rear body),
Further, in the side seal portion, at least a part of the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or is not attached at the time of attachment.
When the attaching / detaching portion is opened at the time of the attachment, the anti-slip opening portion is formed.
Pants type disposable diaper characterized by .

(Action effect)
In the longitudinal direction region having the side seal portion of the exterior body, ((tensile force during elastic deformation of the exterior body forming the front body))> (tensile force during elastic deformation of the exterior body forming the rear body) The side seal portion is located on the front side (ventral side) when worn. Therefore, in the side seal portion, at least a partial region in the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or a non-bonding portion at the time of mounting. When the opening is configured to be the slippage preventing opening, the above-described effects can be obtained only by changing the bonding method of the side seal portion without providing a new manufacturing step such as a cutting step or a notching step. be able to.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes the pants type disposable diaper which can prevent slippage without producing a trace, rash, etc. on a wearer's skin.

It is a top view in the state where a diaper was developed which shows the inside of a pants type disposable diaper. It is a top view in the state where a diaper was developed showing the outer surface of a pants type disposable diaper. It is the 3-3 sectional drawing of FIG. It is 4-4 sectional drawing of FIG. It is 5-5 sectional drawing of FIG. It is the top view in the state which developed the diaper which shows only the principal part of a pants type disposable diaper. It is sectional drawing which shows only the principal part of a pants type disposable diaper. It is a perspective view of a pants type disposable diaper. It is explanatory drawing of the underpants type disposable diaper of a cutting type. It is explanatory drawing of a notched type underpants type disposable diaper. It is explanatory drawing of the pants type disposable diaper of a side seal part utilization type. It is an example (1) (2) and arrangement | positioning explanatory drawing (3) of a slip prevention opening part. It is rocking explanatory drawing of a slender elastic elastic member. FIG. 7 is a view showing the shape of the displacement prevention opening according to Embodiment 1 and the swinging shape of the elongated elastic stretchable member. It is a figure which shows the shape of the slip prevention opening part which concerns on Example 2, and the rocking | fluctuation shape of an elongate elastic elastic member. It is a figure which shows the shape of the slip prevention opening part which concerns on Example 3, and the rocking | fluctuation shape of an elongate elastic elastic member. It is a figure which shows the shape of the slip prevention opening which concerns on Example 4, and the rocking | fluctuation shape of an elongate elastic elastic member. It is a figure which shows the shape of the slip prevention opening part which concerns on Example 5, and the rocking | fluctuation shape of an elongate elastic elastic member. It is a photograph of the left side of the pants type disposable diaper concerning Example 1, and the front. It is a photograph of the left side of the pants type disposable diaper concerning Example 2, and the front. It is a photograph of the left side of the pants type disposable diaper concerning Example 3, and the front. It is a photograph of the left side of the pants type disposable diaper concerning Example 4, and the front. It is a photograph of the left side of the pants type disposable diaper concerning Example 5, and the front.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.
The pants-type disposable diaper of the present embodiment is a longitudinal region (T) having a side seal portion of at least one of the exterior body forming the front body and the exterior body forming the back body, and is the intestine of the wearer It is characterized in that an anti-slip opening (indicated by reference numeral 300 etc.) described later is provided in the iliac crest abutting region which abuts on the bony region. When the slippage prevention opening is provided, the iliac crest region of the wearer fits into the slippage prevention opening, and the exterior body (12) on the waist opening (WO) side from the slippage prevention opening is the intestine of the wearer It gets stuck in the bone area. Therefore, the slip-off of the diaper can be prevented without strengthening the elastic stretchability in the longitudinal direction region (T) of the exterior body, and the urine leakage and the like caused by the slip-off can be prevented. In addition, since it is not necessary to increase the elastic stretching force in the longitudinal direction region (T) of the exterior body, it is possible to expect a function as a vent in the slippage prevention opening.

  The anti-slip opening can be provided by forming a "cut-out" or "notch" in the outer package, or by forming a partial area of the side seal as a mounting separation. Therefore, in the following, in order to clarify the advantages, differences, and the like of these forms, first, elements common to all the forms will be described, and then elements that are features of various forms will be described.

<Basic explanation>
1 to 8 show an example 100 of a shorts-type disposable diaper. In addition, in these figures, in order to make it easy to recognize each element, although the slippage prevention opening part is abbreviate | omitted, the pants type disposable diaper of this form has a slippage prevention opening part mentioned later.

  The underpants type disposable diaper 100 is comprised from the exterior body 12 which makes a product outer surface (back surface), and the interior body 200 affixed on the inner surface of the exterior body 12. As shown in FIG. The symbol Y indicates the total length of the diaper in the unfolded state (longitudinal length from the edge of the waist opening WO of the front part F to the edge of the waist opening WO of the back part B), and the symbol X indicates the full width of the diaper in the unfolded state Is shown.

  The interior body 200 is a portion that absorbs and holds excrement such as urine, and the exterior body 12 is a portion for supporting the interior body 200 with respect to the wearer's body. The dotted portions in the cross-sectional view indicate adhesives as joining means for joining the respective constituent members, and by using a solid such as a hot melt adhesive, a bead, a curtain, a summit or spiral application, etc. The fixed portion is formed by application to the outer peripheral surface of an elastic stretchable member such as a comb gun or a sure wrap application instead or together with this. As bonding means for bonding the respective constituent members, welding means such as heat seal or ultrasonic seal can be used.

(Interior body)
The inner body 200 can have any shape, but is rectangular in the illustrated form. As shown in FIGS. 3 to 5, the inner body 200 is provided with a surface sheet 30 on the body side, a liquid impermeable sheet 11, and an absorbent element 50 interposed therebetween. Yes, it is the main part that carries the absorption function. Reference numeral 40 denotes an intermediate sheet (also referred to as a “second sheet”) provided between the top sheet 30 and the absorbent element 50 in order to rapidly transfer the liquid having permeated through the top sheet 30 to the absorbent element 50. In the figure, reference numeral 60 denotes a solid gather 60 provided on both sides of the inner body 200 to prevent excrement from leaking to both sides of the inner body 200. It shows.

(Front sheet)
The top sheet 30 has a property of transmitting liquid, and can be exemplified by a non-porous or non-porous non-woven fabric, a porous plastic sheet, and the like. Moreover, among these non-woven fabrics, the raw material fibers are not particularly limited. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. For example, if flexibility and drape are required, the spun bond method and spun lace method require bulkiness and softness, and the air through method, point bond method and thermal bond method are preferable processing methods. .

  Further, the top sheet 30 may be formed of one sheet or may be formed of a laminated sheet obtained by bonding two or more sheets. Similarly, the surface sheet 30 may be a single sheet or two or more sheets in the plane direction.

  When the solid gathers 60 are provided, both sides of the top sheet 30 pass between the liquid impermeable sheet 11 and the solid gathers 60 and turn to the back side of the absorbent element 50 to prevent penetration of the liquid. It is preferable to adhere to the impermeable sheet 11 and the three-dimensional gather 60 by a hot melt adhesive or the like.

(Intermediate sheet)
In order to rapidly transfer the liquid having permeated through the surface sheet 30 to the absorber, an intermediate sheet 40 can be provided, which has a faster liquid permeation rate than the surface sheet 30. This intermediate sheet 40 not only allows the liquid to be rapidly transferred to the absorber to enhance the absorption performance by the absorber, but also prevents the phenomenon of "reversion" from the absorber of the absorbed liquid, and always dries on the top sheet 30 It can be in a state of The intermediate sheet 40 can be omitted.

As the intermediate sheet 40, materials similar to those of the surface sheet 30, spun lace, spun bond, SMS, pulp nonwoven fabric, mixed sheet of pulp and rayon, point bond or crepe paper can be exemplified. In particular, an air through non-woven fabric is preferable because it is bulky. It is preferable to use a core-sheath composite fiber as the air-through nonwoven fabric. In this case, the resin used for the core may be polypropylene (PP) but polyester (PE) having high rigidity is preferable. Basis weight is preferably ^{20~80g / m 2, 25~60g / m} 2 is more preferable. The thickness of the non-woven material fiber is preferably 2.2 to 10 dtex. In order to make the nonwoven fabric bulky, it is also preferable to use eccentric fibers having no core in the center, hollow fibers, eccentric and hollow fibers as mixed fibers of all or part of the raw material fibers.

  The intermediate sheet 40 illustrated in FIG. 3 is disposed shorter than the width of the absorbent body 56 in the center, but may be provided over the entire width. The longitudinal length of the intermediate sheet 40 may be the same as the length of the absorber 56, or may be within a short length range centered on the liquid receiving area.

(Liquid impervious sheet)
The material of the liquid impermeable sheet 11 is not particularly limited. For example, a plastic film made of an olefin resin such as polyethylene or polypropylene, a laminated non-woven fabric having a plastic film on the surface of a non-woven fabric, or a plastic film A laminated sheet etc. which overlapped and joined a nonwoven fabric etc. can be illustrated. For the liquid impermeable sheet 11, it is preferable to use a liquid-impervious and moisture-permeable material that is preferably used in recent years from the viewpoint of preventing bleeding. As a plastic film having moisture permeability, a microporous plastic film obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction Is widely used. In addition, non-woven fabric using microdenier fibers, reinforcement of leakproofness by reducing the voids of the fibers by applying heat and pressure, and methods of coating highly water-absorbent resin or hydrophobic resin or water repellent agent Thus, a sheet which is made liquid impermeable without using a plastic film can also be used as the liquid impermeable sheet 11.

  The liquid-impervious sheet 11 has a width that fits on the back side of the absorbent element 50 as shown, and the side of the top sheet 30 of the absorbent element 50 is wound around both sides of the absorbent element 50 to enhance leakproofness. It can also be extended to both sides of the The width of the extension portion is suitably 5 to 20 mm respectively on the left and right.

  In addition, on the inner side of the liquid impermeable sheet 11, in particular, on the side surface of the absorber 56, it is possible to provide an excretion indicator whose color changes due to absorption of the liquid content.

(3D gather)
The three-dimensional gather 60 is a strip-shaped member extending along the both sides of the inner body 200 in the front-rear direction, and blocks urine or loose stool moving laterally on the surface sheet 30 to prevent side leakage. Provided for The three-dimensional gather 60 of the present embodiment is provided to stand up from the side portion of the inner body 200, and the portion on the root side stands obliquely toward the central side in the width direction, and the portion on the tip side from the middle portion has a width It stands diagonally outward in the direction.

  More specifically, the three-dimensional gather 60 folds a band-shaped gather sheet 62 having a length equal to the longitudinal length of the inner body 200 in the width direction and folds it into two, and A plurality of elongated elastic stretchable members 63 are fixed in a stretched state along the longitudinal direction at intervals in the width direction. The base end of the solid gather 60 opposite to the tip (the end opposite to the sheet-folded portion in the width direction) is a mounting portion 65 fixed to the back of the side edge of the interior body 200, The portion other than the mounting portion 65 is a projecting portion 66 (portion on the folded portion side) protruding from the mounting portion 65. Further, the protruding portion 66 is composed of a root side portion toward the center in the width direction and a tip side portion folded back outward in the width direction from the tip of the root side portion. This form is a surface contact type solid gatherer, but a line contact type solid gatherer (not shown) which is not folded back in the width direction can also be adopted. Further, the hot melt adhesive (in place of or in addition to this, fixing means by material welding such as heat sealing, ultrasonic sealing, etc. to the side surface of the surface sheet 30 with the both ends in the front and rear direction of the projecting portion 66 being in a laid down state Can also be used as the front and rear fixed portion 67 fixed by the front and rear direction fixed portion 67, while the front and rear direction intermediate portion located between them is The elastic member 63 is fixed in an extended state.

The gather sheet 62 is a flexible non-woven fabric excellent in softness, uniformity and concealability such as spunbond non-woven fabric (SS, SSS, etc.), SMS non-woven fabric (SMS, SSMMS, etc.), melt-blown non-woven fabric, etc. The treated one can be suitably used, and the fiber basis weight is preferably 10 to 30 g / m ² . A rubber thread or the like can be used as the elongated elastic stretchable member 63. When spandex thread rubber is used, the thickness is preferably 470 to 1240 dtex, and more preferably 620 to 940 dtex. 150 to 350% is preferable and 200 to 300% of the elongation rate at the time of fixation is more preferable. The term "extension rate" means a value when the natural length is 100%. Also, as shown, a waterproof film 64 can be interposed between the two-folded gather sheet.

  The number of the elongated elastic stretchable members 63 provided in the free portion of the solid gather 60 is preferably 2 to 6, and more preferably 3 to 5. The arrangement interval 60d is suitably 3 to 10 mm. With this configuration, the skin can be easily hit in the area where the elongated elastic stretchable member 63 is disposed. The elongated elastic stretchable member 63 may be disposed not only on the distal end side but also on the root side.

  An object to which the mounting portion 65 of the solid gather 60 is fixed can be an appropriate member such as the surface sheet 30 in the interior body 200, the liquid impermeable sheet 11, and the absorbent element 50.

  In the three-dimensional gather 60 thus configured, although the contraction force of the elongated elastic elastic member 63 acts to bring the both ends in the back and forth direction closer, the both ends of the projecting portion 66 are fixed so as not to stand up. On the other hand, since the space between them is a non-fixed free part, only the free part stands up to abut on the body side as shown in FIG. In particular, when the mounting portion 65 is positioned on the back side of the interior body 200, the solid gathers 60 stand upright so as to open outward in the width direction at the crotch and its vicinity, It will come in contact and the fit will be improved.

  The dimensions of the solid gather 60 can be determined as appropriate, but in the case of an infant paper diaper, for example, as shown in FIG. 7, the standing height of the solid gather 60 (length in the width direction of the projecting portion 66 in the unfolded state) W6 is It is preferably 15 to 60 mm, in particular 20 to 40 mm. In addition, it is preferable that the separation distance W3 between the folds positioned at the innermost side in the flat folded state so as to be parallel to the surface of the surface sheet 30 is 60 to 190 mm, particularly 70 to 140 mm.

  It should be noted that, unlike the illustrated embodiment, solid gathers can be provided double (two rows) on each of the left and right sides of the interior body 200.

(Absorbent element)
The absorbent element 50 has an absorbent body 56 and a packaging sheet 58 which wraps the whole of the absorbent body 56. The packaging sheet 58 can also be omitted.

(Absorber)
The absorber 56 can be formed by an assembly of fibers. As this fiber assembly, a filament assembly obtained by opening as needed a fiber (a fiber bundle) of synthetic fibers such as cellulose acetate in addition to those obtained by stacking short fibers such as cotton-like pulp and synthetic fibers Can also be used. The fiber weight may be, for example, 100 to 300 g / m ² in the case of stacking cotton-like pulp or short fibers, and in the case of filament aggregate, for example, 30 to 120 g / m ^2. . The fineness in the case of a synthetic fiber is, for example, 1 to 16 dtex, preferably 1 to 10 dtex, and more preferably 1 to 5 dtex. In the case of a filament assembly, the filaments may be non-crimped fibers, but are preferably crimped fibers. The degree of crimp of the crimped fiber can be, for example, 5 to 75, preferably 10 to 50, and more preferably 15 to 50 per inch (2.54 cm). In addition, crimped fibers which are uniformly crimped are often used. It is preferable that the superabsorbent polymer particles be dispersed and held in the absorbent body 56.

  The absorber 56 may have a rectangular shape, but as illustrated in FIG. 1, an hourglass having a front end, a rear end, and a narrow portion located between them and narrower than the front end and the rear end. The shape is preferable because the fit around the legs of the absorber 56 itself and the three-dimensional gather 60 is improved.

  Although the size of the absorber can be determined as appropriate, it is preferable that the absorber extends in the front-rear direction and the width direction to the peripheral portion of the inner body or in the vicinity thereof. The reference numeral 56X in FIG. 6 indicates the width of the absorber 56.

(Superabsorbent polymer particles)
The absorbent body 56 may contain superabsorbent polymer particles in part or all thereof. The superabsorbent polymer particles include "powder" in addition to "particles". As the superabsorbent polymer particles, those used for absorbent articles of this type can be used as they are, for example, sieved by sieving (shake for 5 minutes) using a standard sieve of 500 μm (JIS Z8801-1: 2006) The proportion of particles remaining on the top is preferably 30% by weight or less, and the proportion of particles remaining on the sieve by sieving (shake for 5 minutes) using a standard sieve of 180 μm (JIS Z8801-1: 2006) is 60 weight% or more is desirable.

  The material of the superabsorbent polymer particles can be used without particular limitation, but a material having a water absorption amount (JIS K 7223-1996 “Method of testing water absorption of highly water-absorbent resin”) of 40 g / g or more is preferable. Examples of the superabsorbent polymer particles include starch-based, cellulose-based and synthetic polymer-based particles, such as starch-acrylic acid (salt) graft copolymer, saponified starch-acrylonitrile copolymer, and crosslinked sodium carboxymethyl cellulose. A thing, an acrylic acid (salt) polymer, etc. can be used. The shape of the superabsorbent polymer particles is preferably in the form of commonly used powdery particles, but other shapes may also be used.

  As the superabsorbent polymer particles, those having a water absorption rate of 70 seconds or less, particularly 40 seconds or less are suitably used. If the water absorption rate is too slow, so-called reversion in which the liquid supplied into the absorber 56 returns out of the absorber 56 tends to occur.

  Further, as the superabsorbent polymer particles, those having a gel strength of 1000 Pa or more are suitably used. Thereby, even in the case of the bulky absorber 56, it is possible to effectively suppress the sticky feeling after liquid absorption.

The basis weight of the superabsorbent polymer particles can be appropriately determined in accordance with the absorption required for the application of the absorber 56. Therefore, although it can not generally say, it can be 50-350 g / m < ² >. If the basis weight of the polymer is less than 50 g / m ² , it will be difficult to secure the absorption amount. When it exceeds 350 g / m ² , the effect is saturated.

  If necessary, the superabsorbent polymer particles can adjust the spray density or the spray amount in the planar direction of the absorber 56. For example, it is possible to increase the spray amount of the fluid excretory site from other sites. When considering gender differences, males can increase the spray density (amount) on the front side, and females can increase the spray density (amount) in the center. In addition, it is possible to provide a portion where no polymer is present locally (for example, in the form of a spot) in the planar direction of the absorber 56.

(Packaging sheet)
When the packaging sheet 58 is used, tissue paper, in particular, crepe paper, non-woven fabric, polylaminated non-woven fabric, a sheet with small holes, or the like can be used as the material. However, it is desirable that it is a sheet from which the superabsorbent polymer particles can not escape. When non-woven fabric is used instead of crepe paper, hydrophilic SMS non-woven fabric (SMS, SSMMS, etc.) is particularly preferable, and polypropylene, polyethylene / polypropylene composite material, etc. can be used as its material. The coating weight is preferably 5 to 40 g / m ² , particularly 10 to 30 g / m ² .

  The packaging form of the packaging sheet 58 can be determined as appropriate, but from the viewpoint of ease of manufacture and prevention of leakage of superabsorbent polymer particles from the front and rear edges, a cylinder is used to surround the front and back and both sides of the absorber 56. It is preferable that the sheet is wound in a shape and the front and rear edges thereof are ejected from the front and back of the absorber 56, and the extruded part is crushed in the front and back direction and joined by joining means such as a hot melt adhesive.

(Exterior body)
The exterior body 12 has a portion forming a front body F extending from the center in the front-rear direction to the ventral side, and a portion forming a back body B extending from the center in the front-rear direction to the back side. As shown in FIG. 8, the waist opening WO for passing the torso of the wearer and the left and right for passing the legs are formed, as shown in FIG. A pair of leg openings LO are formed.

  The exterior body 12 has a waist portion T defined as a longitudinal range (a longitudinal range from the waist opening WO to the upper end of the leg opening LO) having the side seal portion 12A, and a longitudinal range of a portion forming the leg opening LO It has a longitudinal direction region having the side seal portion 12A of the front body F and an intermediate portion L defined between the longitudinal direction region having the side seal portion 12A of the rear body B). The waist T can be divided into a “waist edge” W that conceptually forms an edge of a waist opening and a “waist lower portion” U that is a lower portion of the waist edge. Generally, in the case where there is a boundary in the waist portion T at which the stretching stress in the width direction changes (for example, the thickness and the extension rate of the elastic stretch member change), the waist opening WO side has a waist edge than the boundary at the waist opening WO most When there is no such boundary, the waist opening WO side becomes the waist edge W side than the absorber 56 or the inner body 200. The length in the longitudinal direction varies depending on the size of the product, and can be determined as appropriate. For example, the waist edge W can be 15 to 40 mm, and the lower waist portion U can be 65 to 120 mm. On the other hand, both side edges of the middle portion L are narrowed along the circumference of the adherend's leg, and this is a site into which the wearer's leg is inserted. As a result, the exterior body 12 is generally shaped like an hourglass. The degree of constriction of the exterior body 12 can be determined as appropriate, and it may be made narrower than the width of the interior body 200 in the narrowest portion in order to have a clean appearance as in the embodiment shown in FIGS. Although it is preferable, the width may be determined to be equal to or greater than the width of the inner body 200 even in the narrowest portion.

  The exterior body 12 is formed by laminating two sheets of sheet materials 12S and 12H with an adhesive such as a hot melt adhesive as shown in FIGS. Although 12H extends only to the edge of the waist opening WO, the outer sheet material 12S wraps around the waist side edge of the inner sheet material 12H and is folded back inside, and this folded portion 12r is the interior body 200. It extends so as to cover up to the waist side end of.

As the sheet materials 12S and 12H, any sheet material can be used without particular limitation, but it is preferable to be a non-woven fabric. The non-woven fabric is not particularly limited as to its raw material fiber. For example, synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, regenerated fibers such as rayon and cupra, natural fibers such as cotton, etc., mixed fibers of which two or more are used, composite fibers Etc. can be illustrated. Furthermore, the non-woven fabric may be produced by any processing. Examples of the processing method include known methods such as spun lace method, spun bond method, thermal bond method, melt blown method, needle punch method, air through method, point bond method and the like. When using a nonwoven fabric, it is preferable to make the fabric weight into 10-30 g / m < ² >.

The total basis weight of the package 12 is preferably 20 to 60 g / m ² , and the total light transmittance defined by JIS K 7105 of the package 12 is 40% or more, particularly 50% or more. Is preferred.

  And, in order to improve the fit to the circumference of the body, or to carry out the “side seal part separation mold: second example” described later, the exterior body 12 may be provided with thread rubber or the like between both sheet materials 12S and 12H. Elongated elastic stretchable members 15 to 19 are provided at a predetermined elongation rate. As the elongated elastic stretchable members 15 to 19, either synthetic rubber or natural rubber may be used. To bond the two sheet materials 12S and 12H of the outer package 12 and to fix the elongated elastic stretchable members 15 to 19 sandwiched therebetween, hot melt adhesion, heat seal or ultrasonic adhesion by various application methods may be used. it can. It is not preferable to firmly fix the entire surface of the exterior body 12 because the texture of the sheet is impaired. It is preferable that these be combined and the adhesion of the elongated elastic stretchable members 15 to 19 be strong, and that the other parts be not adhered or be adhered weakly.

  It should be noted that instead of providing the elongated elastic stretchable members 15 to 19 between both sheet materials 12S and 12H, or together with this, elastic stretchable materials such as stretchable non-woven fabric and stretchable film are used as both sheet materials 12S and 12H etc. You can also

As an example, between the inner surface of the inner sheet material 12H at the waist edge W of the back body B and the front body F and the outer surface of the folded portion 12r of the outer sheet material 12S, the entire width direction is continuous. A plurality of waist edge elastic stretchable members 17 are fixed in a state of being spaced apart in the vertical direction, and being stretched along the width direction at a predetermined stretch rate. In addition, one or more of the waist edge elastic and elastic members 17 disposed in the area adjacent to the lower waist portion U may overlap the interior body 200 or have a width overlapping the interior body 200. It may be provided on both sides in the width direction except for the central portion in the direction. The waist edge elastic stretch member 17 has a thickness of 155 to 1880 dtex, preferably 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1). .0Mm ^2. the rubber thread), 3 to 22 present at intervals of 4 to 12 mm, respectively elongation from 150% to 400%, preferably fixed in particular from 220 to 320%. Further, the waist edge elastic stretch member 17 does not have to have the same thickness and elongation rate at all, for example, the thickness and the elongation rate of the elastic stretch member may be different between the upper portion and the lower portion of the waist edge W .

  Further, between the outer surface of the inner sheet material 12H and the inner surface of the outer sheet material 12S in the lower waist portion U of the front body F and the rear body B, except for the widthwise central portion overlapping with the inner body 200, A plurality of waist lower elastic elastic members 15 and 19 made of elongated elastic elastic members are vertically spaced from each other at upper and lower sides at predetermined intervals. It is fixed in a state of being stretched along the width direction at a stretching rate.

The waist lower elastic elastic members 15 and 19 have a thickness of 155 to 1880 dtex, preferably 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 20). Preferably, 5 to 30 yarn rubbers of 1.0 mm ² ) are fixed at an interval of 1 to 15 mm, particularly 3 to 8 mm, at an elongation of 200 to 350%, especially 240 to 300%.

  Further, between the outer surface of the inner sheet material 12H and the inner surface of the outer sheet material 12S in the middle portion L of the front body F and the rear body B, except for the width direction central portion overlapping with the inner body 200, the width A plurality of intermediate elastic stretchable members 16 and 18 formed of elongated elastic stretchable members are vertically spaced from each other on both sides of the direction at a predetermined elongation rate so as to be continuous over the entire width direction. It is fixed in a stretched state along the direction.

The middle elastic elastic members 16 and 18 have a thickness of 155 to 1880 dtex, particularly 470 to 1240 dtex (in the case of synthetic rubber. In the case of natural rubber, a cross-sectional area of 0.05 to 1.5 mm ² , particularly 0.1 to 1). .0Mm ^2. the rubber thread), 5 to 40 mm, in particular 2 to 10 present at intervals of 5 to 20 mm, respectively elongation 150-300%, preferably fixed in particular 180 to 260%.

  As illustrated, the lower waist elastic and elastic members 15, 19, 16, 18 are provided on both sides in the width direction except for a part or all of the portion overlapping the interior body 200. In this case, the inner body 200 does not shrink more than necessary in the width direction, and the appearance does not deteriorate and the absorbability does not decrease. In this embodiment, in addition to the configuration in which the elastic stretchable members exist only on both sides in the width direction, the elastic stretchable members exist across the interior body 200 from one side to the other side in the width direction. The elastic stretchable member is finely cut in part or all of the portion, and no contraction force acts (substantially equivalent to the absence of the elastic stretchable member), and only both sides in the width direction thereof are acting as a contraction force acting portion The form comprised is also included. Of course, the arrangement form of the lower waist elastic stretchable members and the middle elastic stretchable members 15, 19, 16, 18 is not limited to the above example, and the stretch force acts over the entire width direction including the portion overlapping the interior body 200. As a result, a part or all of the waist lower portion elastic stretchable member and the intermediate portion elastic stretchable members 15, 19, 16, 18 may be provided across the inner body 200 from one side to the other side in the width direction.

  When a rubber containing titanium oxide is used as the elongated elastic stretchable members 15 to 19, it is preferable to use one having a low content of titanium oxide (for example, 2% or less) or one not containing titanium oxide. .

(Exterior body division structure)
In the above-mentioned example, the front body F to the back body B are continuously covered by the integral outer package 12, but the outer package is a belly side outer package that covers the belly side of the wearer's waist and the back The front end portion of the inner body is connected to the inner surface in the width direction central portion of the ventral outer body by a hot melt adhesive or the like, and the widthwise center of the back outer body is divided. Use a form in which the rear end of the inner body is connected to the inner surface of the inner body by a hot melt adhesive or the like, and the ventral exterior body and the dorsal exterior body are not continuous on the crotch side and are separated. Can. This separation distance can be 150 to 250 mm. In this case, the back of the liquid-impervious sheet in the interior body covers the entire back surface of the interior body, or the entire exposed portion between the ventral exterior body and the dorsal exterior body. It is also possible to fix a part exterior body. As the crotch outer package, the same material as that used for the above-described package can be used. The crotch outer package also corresponds to the package of the present invention.

<Cutout type>
Next, an embodiment of the slippage prevention opening will be described.
The (1)-(3) of FIG. 9 showed the underpants-type disposable diaper 100 which belongs to a cut-out type | mold. In the present diaper 100, a cutout is formed in the exterior body 12 in which the inner sheet material 12H and the outer sheet material 12S are laminated, and this cutout serves as the anti-slip opening 300. The anti-slip opening 300 is a longitudinal region having the side seal portion 12A of the exterior body 12 and in the iliac crest abutment region which abuts on the iliac crest region of the wearer, in the illustrated example, around the waist of the exterior body 12 It is provided in part T. The anti-slip opening 300 is an opening into which the iliac crest region called the hip bone portion etc. of the wearer fits, and it is a front body F of the exterior body 12 so that a pair is symmetrical about the widthwise center line. Provided in

  In this embodiment, the iliac crest region of the wearer fits in the cut-off opening 300, and the exterior body 12 on the waist opening WO side (usually the waist edge W) from the opening 300 Gets caught in the wearer's iliac crest area. Therefore, the slip-off of the diaper can be prevented without strengthening the elastic stretchability at the waist T of the exterior body 12 forming the front body F and the exterior body 12 forming the rear body B. Moreover, in this embodiment, the shape of the slippage prevention opening 300 can be easily changed, and the fit of the wearer to the iliac crest region can be enhanced by devising the shape of the slippage prevention opening 300 it can. Furthermore, in this embodiment, unlike the case of the “side seal portion utilizing type” described later, the above-described effects can be obtained without changing the manufacturing process of the side seal portion 12A.

  In this embodiment, when the elongated elastic stretchable member is used around the waist, the elongated elastic stretchable member positioned on the front body rather than the shift prevention opening 300 is pivoted to avoid the shift prevention opening 300. Arrange it. By arranging the elongated elastic stretchable member by swinging, the non-existing portion of the elongated elastic stretchable member positioned on the front body side of the shift preventing opening 300 can be eliminated, and the elastic stretchability is reduced. You can prevent.

  1-15 mm is preferable and, as for nearest distance with the slip prevention opening part 300 of the elongate elastic elastic member to rock | fluctuate, 5-10 mm is more preferable. The arrangement interval of the swinging elongated elastic stretchable members can be 1 to 20 mm, preferably 4 to 10 mm.

  The swinging elongated elastic stretchable member may overlap with the elastic stretchable member.

  Here, in the present embodiment, the elastic deformation tensile force in the width direction of the exterior body 12 forming the front body F can be suppressed to, for example, 3.0 to 16.0 N, preferably 5.0 to 14.0 N. Further, the tensile force during elastic deformation of the exterior body 12 forming the back body B in the width direction can be similarly suppressed, for example, to 3.0 to 16.0 N, preferably 5.0 to 14.0 N. In this respect, when the tensile force during elastic deformation of the exterior body 12 forming the front body F and the rear face B in the elastic deformation direction is less than 3.0 N, the iliac crest region is easily detached from the anti-slip opening 300 and the diaper is worn. The fall prevention effect may be insufficient. In addition, the fit of the present diaper 100 may be insufficient. On the other hand, if the tensile force during elastic deformation in the width direction of the exterior body 12 forming the front body F and the back garnish B exceeds 16.0 N, there is a risk that marks or blurring may occur on the wearer's skin. In this respect, for example, in Japanese Patent Application Laid-Open No. 11-021702, there is a proposal that "an opening is provided to allow a finger to be put in order to lift the diaper" and in Japanese Patent Application Laid-Open No. 2004-267335 It has been proposed that the fingertip of the hand is hooked in the opening to pull up the pants-type diaper. However, the anti-slip opening 300 of the present embodiment is an opening into which the iliac crest region of the wearer fits, and from the viewpoint that the iliac crest region fits, attention needs to be paid to the tensile force at the time of elastic deformation. Therefore, it can be said that the tensile force at the time of elastic deformation can be considered as a study in the direction in which it becomes difficult for a finger to be caught in the slip prevention opening 300, and the above prior application can not be referred to.

  Each shift preventing opening 300 can have a distance 300X from the front end edge of the exterior body 12 in the longitudinal direction, for example, 10 to 80 mm, preferably 20 to 50 mm, more preferably 20 to 30 mm. In addition, each displacement preventing opening 300 can have a distance 300Y from the widthwise side edge of the exterior body 12 of, for example, 5 to 80 mm, preferably 15 to 70 mm, and more preferably 20 to 50 mm. Furthermore, each displacement preventing opening 300 can have a length 300L in the front-rear direction of, for example, 20 to 80 mm, preferably 40 to 70 mm, and more preferably 50 to 60 mm. In addition, each shift preventing opening 300 can have a length 300 W in the width direction of, for example, 5 to 80 mm, preferably 10 to 60 mm, and more preferably 30 to 50 mm.

  Each anti-slip opening 300 may have an appropriate shape so as to fit in the iliac crest region, for example, a circular shape, a vertically-long oval shape, a horizontally-long oval shape, a square, a vertically-long rectangular shape, a horizontally-long rectangular shape, any And the like. Further, as shown in the enlarged view in (2) of FIG. 9, when the elongated elastic stretchable members 17 and 19 provided with the exterior body 12 are arranged in a rocking manner in accordance with these shapes, The fit is improved and both the anti-slip effect and the fit are improved.

  However, the shape, size, and position of the slip prevention opening 300 or the swing (swing shape), arrangement, and the like of the elongated elastic stretchable members 17 and 19 provided on the outer package 12 are particularly as follows. It becomes desirable.

  First, the shape of the anti-slip opening 300 is a slender shape having a longitudinal direction and a width direction, preferably an elliptical shape as shown in (1) of FIG. 12, and the lower end side (crotch side) is forward (abdominal side) It is preferable that the upper end side (waist W side) be inclined rearward (back side B) to F). In this respect, the iliac crest region of the wearer, when viewed from the side, is generally shaped such that the lower end is inclined forward and the upper end is inclined backward. Therefore, by making the shape of the anti-slip opening 300 elliptical and inclining as described above, the iliac crest region of the wearer can be fitted more easily, and the slippage prevention effect is achieved. Improve.

  In addition, the inclination angle α of the slippage prevention opening 300 is 50 to 85 ° when the exterior sheet 12 is stretched to be 170% of the length in the natural state (100%). It is preferable to design to be 60 to 70 °. According to various investigations conducted by the present inventors, the iliac crest region of the wearer is usually inclined at an inclination angle of 50 to 85 °, which is in line with this inclination.

  Next, when the size of the slippage prevention opening 300 is such that the exterior sheet 12 is 170% of the length in the natural state (100%), the longitudinal length R1 is It is preferable to design so that it may be 40-100 mm, and it is more preferable to design so that it may be 50-70 mm. In addition, when the exterior sheet 12 is pulled to be 170% of the length in the natural state (100%), the length R2 in the width direction is designed to be 20 to 70 mm. Preferably, it is more preferably designed to be 30 to 50 mm. When the size of the slippage prevention opening 300 is in the above range, combined with the expansion and contraction of the exterior sheet 12, it becomes suitable for many wearers.

  Furthermore, when the shape of the anti-slip opening 300 can be designed in more detail, as shown in FIG. 12 (2), the upper end side is more than the lower end side (crotch side) on the premise of the above inclination. It is preferable that the width R2 of the anti-slip opening 300 be expanded in the (waist W side) direction. More specifically, it is preferable to design the reverse raindrop shape (inverted egg shape) with a swell angle β of 30 to 60 ° at the lower end side, and a reverse raindrop shape of 40 ° at the swell angle β of the lower end It is more preferable to design as follows. This shape is more in line with the shape of the iliac crest region of the wearer, and the anti-slip effect is further improved.

  Here, "reverse raindrop shape (inverted egg shape)" is not an elliptical shape in which the upper and lower lines are line symmetrical, but is, for example, a shape in which eggs are inverted or raindrops are inverted. It is an elliptical shape in which the upper end side bulges (spreads) compared to the lower end side. In addition, this shape means the shape in the state which the exterior | packing sheet 12 extended completely.

  The swelling angle β on the lower end side is as shown in (2) of FIG. 12 when the exterior sheet 12 is stretched to be 170% of the length in the natural state (100%). This means the angle at the intersection of two tangents Ry in contact at an intermediate point Rx in the longitudinal direction of the anti-rotation opening 300. Further, the length R1 in the longitudinal direction and the length R2 in the width direction of the anti-shear-drop-shaped anti-slip opening 300 are the same as the anti-slip opening 300 in the elliptical shape ((1) in FIG. 12) described above. Is preferred.

  Here, as shown in (3) of FIG. 12, the formation position of the anti-slip opening 300 is preferably such that the length S1 from the upper end edge to the waist W is 20 to 80 mm and 40 to 60 mm. More preferable. Moreover, it is preferable that it is 5-30 mm, and, as for length S2 from the back side edge to the side seal part 12A, it is more preferable that it is 10-20 mm. According to various investigations by the present inventors, the iliac crest region of the wearer is usually located 40 mm below the navel and 10 mm from the outermost edge. Therefore, by setting the formation position in the above range, the anti-slip effect can be reliably achieved.

  Next, the swinging shape, the arrangement, and the like of the elongated elastic stretchable members 17 and 19 provided on the exterior body 12 around the shift preventing opening 300 will be described.

  As shown in (1) of FIG. 13, the elongated elastic stretchable members 17 and 19 are arranged to swing so as to avoid the shift preventing opening 300. As described above, by arranging the elongated elastic stretchable members 17 and 19 so as to swing, it is possible to eliminate the non-existing portion of the elongated elastic stretchable members 17 and 19 and to prevent the decrease in elastic stretchability. . As shown in (2) of FIG. 13, the swaying arrangement of the elongated elastic stretchable members 17 and 19 includes three positions of the elongated elastic stretchable members 17 and 19 in the area Za, the area Zb, and the area Zc. It is preferable that division be performed so that the elongated elastic stretchable members 17 and 19 swing along the respective regions Za, Zb and Zc. According to this embodiment, not only the elastic stretchability of the exterior sheet 12 is balanced but also the ease of manufacture is excellent.

Here, each of the regions Za, Zb, and Zc is more preferable as follows.
First, the region Za is located on the back side B 10 to 40 mm above the upper end edge (waist W side) of the upper end edge of the shift preventing opening 300, the swing angle γa is 45 to 85 °, and the peripheral edge of the shift stopping opening 300 Swing to the lower side (crotch side), and reach the ventral side F.

  Next, the area Zb is located on the back side B below the area Za (crotch side) and the swing angle γb is 30 to 60 ° along the periphery of the anti-rotation opening 300 (the waist W Swings to the ventral side F).

  Finally, the region Zc is located on the back side B below the region Zb (crotch side), preferably below the center point of the anti-slip opening 300, and the swing angle γc is 15 to 45 ° Swing to the lower side (the crotch side) along the peripheral edge of the anti-displacement opening 300 and reach the ventral side F.

  In addition, the description regarding the above rocking | fluctuation does not mean that the starting point at the time of arrange | positioning the elongate elastic elastic members 17 and 19 is the back side B. FIG. The placement start point may be the ventral side F or the simultaneous placement on the dorsal side B and the ventral side F as long as the rocking shape is as described above.

<Notch type>
The pants type disposable diaper 100 which belongs to a notch type was shown to (1)-(3) of FIG. In the present diaper 100, a notch is formed in the exterior body 12 in which the inner sheet material 12H and the outer sheet material 12S are stacked, and this notch is used as the anti-slip opening 400. Although the anti-slip opening 400 is provided in the iliac crest contact area (in the illustrated example, the waist T) in the same manner as the above-described cutout type, both sides of the exterior body 12, that is, the side seal 12A It extends toward the widthwise center. The anti-slip opening 400 is also an opening into which the iliac crest region of the wearer fits, and is provided so that the pair is line-symmetrical on the front body F of the exterior body 12 across the center line in the width direction. . However, as shown in (3) of FIG. 10, the main anti-slip opening 400 extends from one side seal 12A to the other side seal 12A, that is, a pair of left and right anti-slip openings 400. May be in a continuous form.

  Also in this embodiment, it is possible to prevent the diaper from slipping off without strengthening the elastic stretchability at the waist T of the exterior body 12 forming the front body F and the exterior body 12 forming the rear body B. In this respect, the iliac crest region may be slightly displaced in the width direction depending on the wearer, but according to the present embodiment, it is not affected by the displacement, and in this point, the anti-slip effect is more excellent than the above-described cutout die. Further, also in the present embodiment, the above-described effects can be obtained without changing the manufacturing process of the side seal portion 12A. Furthermore, in the present embodiment, by appropriately devising the extension length of the slippage prevention opening 400, the function of the slippage prevention opening 400 as a vent can be greatly expected.

  In this embodiment, the tensile force during elastic deformation of the exterior body 12 forming the front body F in the width direction is, for example, 3.0 to 16.0 N, preferably 5.0 to 14.0 N, as in the case of the cutout die. Can be reduced to Further, the tensile force during elastic deformation of the exterior body 12 forming the back body B in the width direction can be similarly suppressed, for example, to 3.0 to 16.0 N, preferably 5.0 to 14.0 N. In this respect, when the tensile force during elastic deformation in the width direction of the exterior body 12 forming the front body F and the rear face B is less than 3.0 N, the iliac crest region is easily detached from the anti-slip opening 400, and the diaper is worn. The fall prevention effect may be insufficient. In addition, the fit of the present diaper 100 may be insufficient. On the other hand, if the tensile force during elastic deformation in the width direction of the exterior body 12 forming the front body F and the back garnish B exceeds 16.0 N, there is a risk that marks or blurring may occur on the wearer's skin.

  Each shift preventing opening 400 can have a distance 400X from the front end edge of the exterior body 12 in the longitudinal direction, for example, 10 to 80 mm, preferably 20 to 50 mm, more preferably 20 to 30 mm. In addition, each displacement prevention opening 400 can have a length 400L in the front-rear direction of, for example, 20 to 80 mm, preferably 40 to 70 mm, and more preferably 50 to 60 mm, as in the case of the cutout type. Further, each shift preventing opening 400 can have a length 400 W in the width direction of, for example, 5 to 120 mm, preferably 10 to 80 mm, and more preferably 30 to 60 mm.

  Although the slippage prevention opening 400 in the illustrated example is formed in a band shape, for example, the length 400L in the front-rear direction may be appropriately changed.

<Side seal part type: first example>
Next, an embodiment in which the shift preventing opening is provided by utilizing the side seal portion 12A will be described.
The side seal part utilization (peeling) type | mold (1st example) pants type disposable diaper 100 was shown in (1) of FIG. In the diaper 100, at least a partial region in the longitudinal direction in the side seal portion 12A is a non-bonding attachment disengaging portion 12Ax having a relatively weak bonding force or a non-joining region as compared to other regions. Further, in the longitudinal direction region having the side seal portion 12A of the exterior body 12, in the present embodiment, in the waist T, (the width Xf of the exterior body 12 forming the front body F) <(the exterior body 12 forming the rear body B) The width is Xb). In this embodiment, as shown in (3) of FIG. 11, the mounting separation portion 12Ax is opened at the time of mounting, and this opening becomes the anti-slip opening portion 500. Since (width Xf of the exterior body 12 forming the front body F) <(width Xb of the exterior body 12 forming the back body B), the anti-slip opening 500 is positioned on the ventral side of the wearer. Therefore, it is possible to obtain the same function and effect as the above-described cutout die and notch die only by changing the joining method of the side seal portion without providing a new manufacturing step such as the cutout step and the notch step.

  Each mounting separation portion 12Ax can set the distance 500X from the front end edge of the side seal portion 12A in the front-rear direction to, for example, 10 to 80 mm, preferably 20 to 50 mm, and more preferably 20 to 30. In addition, each mounting separation portion 12Ax can have a length 500L in the front-rear direction of, for example, 20 to 80 mm, preferably 40 to 70 mm, and more preferably 50 to 60 mm.

  When attaching each separation part 12Ax at the time of non-joining, welding, adhesion, etc. should not be performed. On the other hand, when joining strength is relatively weak, for example, spacing is provided in the front-rear direction A plurality of rows of the spot-like welded portions are arranged in the width direction, and the side seal portion 12A is formed in a dot pattern having non-welded portions over the entire width direction on both sides in the longitudinal direction of each welded portion. A method is conceivable in which the separation portion 12Ax is set as a loose welding area and the other area 12Ay is set as a dense welding area at the time of mounting. The details of this method can be referred to, for example, Japanese Patent Application Laid-Open No. 2013-146419. In addition, on the premise that the above-mentioned dot pattern is used, a method may be considered in which the mounting separation 12Ax is a weak welding area and the other area 12Ay is a strong welding area. That is, the welding power is made to be strong and weak while keeping the welding pattern the same.

<Side seal part usage type: second example>
The side seal part utilization (peeling) type | mold (2nd example) pants type disposable diaper 100 was shown in (2) of FIG. Also in the present diaper 100, in the side seal portion 12A, at least a partial region in the longitudinal direction is set as a non-attached wearing portion 12Ax, which has a relatively weak bonding strength or a non-bonding portion as compared with other regions. On the other hand, unlike the first example, in the waist T, the width of the exterior body 12 forming the front body F and the width of the exterior body 12 forming the back body B are the same, and The tensile force Pb at the time of elastic deformation of the outer package body 12)> (the tensile force Pb at the time of elastic deformation of the outer package body 12 forming the back body B).

  Also in this embodiment, as shown in (3) of FIG. 11, the mounting separation portion 12Ax is opened at the time of mounting, and this opening becomes the shift preventing opening portion 600. Further, (the tensile force Pf during elastic deformation of the outer body 12 forming the front body F)> (the tensile force Pb during elastic deformation of the outer body 12 forming the rear body B) in the width direction 600 is located on the ventral side of the wearer. Therefore, it is possible to obtain the same function and effect as the above-described cutout die and notch die only by changing the joining method of the side seal portion without providing a new manufacturing step such as the cutout step and the notch step.

  The distance 500X from the front end edge of the side seal portion 12A in the front-rear direction of the side seal portion 12A and the length 500L in the front-rear direction of each mounting separation portion 12Ax can be the same as in the first example. Moreover, the method of making each mounting | wearing separation part 12Ax into non-joining, and the method of making bonding strength relatively weak are the same as that of a 1st example.

  The elastic deformation tensile force Pf can be, for example, 5.5 to 16.0 N, preferably 6.0 to 13.5 N. On the other hand, the elastic deformation tensile force Pb can be Pb <Pf, for example 3.0 to 14.0 N, preferably 3.5 to 11.5 N.

  The elastic deformation tensile force Pf and the elastic deformation tensile force Pb are, for example, the elongation of the elongated elastic stretchable members 15 to 19 and the thickness (in the case of synthetic rubber. Cross section in the case of natural rubber). ), The number of arrangement, the arrangement interval, etc. can be adjusted.

<Glossary>
The following terms in the specification have the following meanings unless otherwise indicated in the specification.
"Longitudinal (longitudinal) direction" means a direction connecting the ventral side (front side) and back side (rear side), and "width direction" means a direction (horizontal direction) orthogonal to the longitudinal direction.
"Stretch rate" means the value when natural length is 100%.
"Gel strength" is measured as follows.
Artificial urine (urea: 20 wt%, salt: 8 wt%, calcium chloride dihydrate: 0.3 wt%, magnesium oxide heptahydrate: 0.8 wt%, pure water: 70.01 wt%) to 49.0 g, Add 1.0 g of superabsorbent polymer and stir with a stirrer. The formed gel is left in a constant temperature and humidity chamber at 40 ° C. × 60% RH for 3 hours and then returned to normal temperature, and the gel strength is measured with a curd meter (manufactured by I. techno Engineering: Curdmeter-MAX ME-500).
・ "Age" is measured as follows.
After pre-drying the sample or test piece, it is left in a test room or apparatus under standard conditions (the test place is at a temperature of 20 ± 5 ° C. and a relative humidity of 65% or less) to be in a constant weight state. Pre-drying means making a sample or a test piece constant weight in an environment not exceeding a relative humidity of 10 to 25% and a temperature of 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture percentage is 0.0%. A sample of 200 mm × 250 mm (± 2 mm) in size is cut out from a test piece in a constant weight state using a rice-based board (200 mm × 250 mm, ± 2 mm). The weight of the sample is measured, multiplied by 20, the weight per square meter is calculated, and taken as the basis weight.
- "thickness" is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 10 gf / cm ^2, and the pressure area: automatically measured under the conditions of 2 cm ^2.
The amount of water absorption is measured according to JIS K 7223-1996 “Test method of water absorption of highly water-absorbent resin”.
-Water absorption rate is defined as "time to end point" when JIS K 7224-1996 "Water absorption rate test method for super absorbent polymer" using 2 g of highly absorbent polymer and 50 g of physiological saline. .
-"Elastic deformation tensile force" means the tensile force (N) at 200% elongation when the natural length is 100%, and the side seal of the paper diaper is torn, and the front or back body The width direction both ends of this were grasped with a tension tester, and it is the value which carried out the tension test at the tension speed of 300 mm / min.

Next, an embodiment of the present invention will be described.
First, with regard to the cutout-type underpants type diaper described above, a plurality of shapes in which the shape of the anti-slip opening 300 and the swinging shapes of the elongated elastic stretchable members 17 and 19 are variously prepared are prepared. Next, these pant type diapers were worn on dummy dolls, and the fit of each pant type diaper to the dummy dolls was visually evaluated.

  The elongated elastic stretchable members 17 and 19 were fixed to the exterior sheet so as to have a length of 270% of the length in the natural state (100%). In addition, the arrangement interval was 5 mm. Furthermore, one having a fineness of 470 dt was used.

  The shape of the displacement prevention opening 300 and the swinging shape of the elongated elastic stretchable members 17 and 19 are shown in FIGS. As shown in FIG. 14, in the first embodiment, the shape of the anti-slip opening 300 is a reverse raindrop shape (reverse egg shape). The elongated elastic stretchable members 17 and 19 are not arranged in the above-mentioned area Za. The narrow elastic elastic members 17 and 19 in the region Zb have the above-mentioned rocking angle γb of 30 °, and are located above the central point of the anti-displacement opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zc have the above-mentioned swing angle γc of 15 °, and are positioned lower than the center point of the shift preventing opening 300 on both the back side B and the ventral side F Placed in

  As shown in FIG. 15, in the second embodiment, the shape of the anti-slip opening 300 is circular. The slender elastic stretchable members 17 and 19 in the region Za have the above-mentioned swing angle γa of 45 °, and on the back side B are located on the upper side of the center point of the anti-slip opening 300, It arrange | positions so that it may be located below the central point of the gap stop 300. As shown in FIG. The narrow elastic elastic members 17 and 19 in the region Zb have the above-mentioned rocking angle γb of 30 °, and are located above the central point of the anti-displacement opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zc have the above-mentioned swing angle γc of 15 °, and are positioned lower than the center point of the shift preventing opening 300 on both the back side B and the ventral side F Placed in

  As shown in FIG. 16, in the third embodiment, the shape of the anti-slip opening 300 is an inclined elliptical shape. The slender elastic stretchable members 17 and 19 in the region Za have the above-mentioned swing angle γa of 45 °, and on the back side B are located on the upper side of the center point of the anti-slip opening 300, It arrange | positions so that it may be located below the central point of the gap stop 300. As shown in FIG. The narrow elastic elastic members 17 and 19 in the region Zb have the above-mentioned rocking angle γb of 30 °, and are located above the central point of the anti-displacement opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zc have the above-mentioned swing angle γc of 15 °, and are positioned lower than the center point of the shift preventing opening 300 on both the back side B and the ventral side F Placed in

  As shown in FIG. 17, in the fourth embodiment, the shape of the anti-slip opening 300 is a reverse raindrop shape (reverse egg shape). The slender elastic stretchable members 17 and 19 in the region Za have the above-mentioned swing angle γa of 45 °, and on the back side B are located on the upper side of the center point of the anti-slip opening 300, It arrange | positions so that it may be located below the central point of the gap stop 300. As shown in FIG. The narrow elastic elastic members 17 and 19 in the region Zb have the above-mentioned rocking angle γb of 30 °, and are located above the central point of the anti-displacement opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zc have the above-mentioned swing angle γc of 15 °, and are positioned lower than the center point of the shift preventing opening 300 on both the back side B and the ventral side F Placed in

  As shown in FIG. 18, in the fifth embodiment, the shape of the anti-slip opening 300 is a reverse raindrop shape (reverse egg shape). The slender elastic stretchable members 17 and 19 in the region Za have the above-mentioned rocking angle γa of 30 °, and are positioned above the central point of the shift preventing opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zb have the above-mentioned rocking angle γb of 30 °, and are located above the central point of the anti-displacement opening 300 on both the back side B and the ventral side F Placed. The narrow elastic elastic members 17 and 19 in the region Zc have the above-mentioned swing angle γc of 15 °, and are positioned lower than the center point of the shift preventing opening 300 on both the back side B and the ventral side F Placed in

  The pants type diaper of each example was photographed from the left side and the front in a state of being put on a dummy doll, and listed as FIGS.

(Evaluation)
The best fit was in Example 4 in which the shapes of the ilium and the anti-slip opening 300 were similar. On the other hand, in Examples 2 and 3 in which the shapes of the ilium and the anti-slip opening 300 were different, the fit was slightly reduced. From this, it is understood that the fit is improved when the shapes of the ilium and the anti-slip opening 300 are similar.

  However, even when the shapes of both are identical, the peripheral portion of the slippage prevention opening 300 is slightly floated if the elongated elastic stretchable members 17 and 19 are not disposed on the ventral side F as in the first embodiment. Was found to be In addition, even if the elongated elastic stretchable members 17 and 19 are disposed on the ventral side F of the slippage prevention opening 300 as in the fifth embodiment, the fit property is degraded if there is a wide area not disposed. I also understood that.

  The present invention can be used for the pants-type disposable diaper as described above.

  11: Liquid impermeable sheet, 12: Outer body, 12A: side seal portion, 12r: folded portion, 12H: inner sheet material, 12S: outer sheet material, 15-19: elongated elastic elastic member, 30: surface sheet , 40: middle sheet (second sheet), 50: absorption element, 56: absorption body, 58: packaging sheet, 60: solid gather, 62: gather sheet, 63: elongated elastic elastic member, 65: attachment portion, 66: ... Protruding part, 67: front and back fixed part, 68: free part, 100: pants type disposable diaper, 200: interior body, 300, 400, 500, 600: shift preventing opening, B: rear end, F: front body, LO ... leg opening, T ... waist part, U ... lower waist part, W ... waist edge, WO ... waist opening, Za, Zb, Zc ... area.

Claims (4)

A side seal portion is formed by joining the both sides of the exterior body forming the front body extending from the crotch to the ventral side and the both sides of the exterior body forming the back body extending from the crotch to the back A pants-type disposable diaper having a waist opening for passing a trunk of a wearer and a pair of left and right leg openings for passing a leg, and an interior body including an absorber inside the exterior body. And
A longitudinal direction region having the side seal portion of at least one of the exterior body forming the front body and the exterior body forming the rear body is configured to elastically stretch in the width direction.
And, wherein the longitudinal regions in a in the iliac crest region of the wearer in contact with the iliac crest contact regions, dislocation-preventing opening provided et al is,
A cutout is formed in the exterior body forming the front body, and the cutout serves as the anti-slip opening.
The anti-slip opening has an elongated shape having a longitudinal direction and a width direction,
The crotch side is inclined to the ventral side, and the waist side is inclined to the dorsal side,
Pants type disposable diaper characterized by. The tensile force during elastic deformation in the width direction of the exterior body forming the front body is 3.0 to 16.0 N,
And, the longitudinal length of the shift preventing opening is 20 to 80 mm,
The pants-type disposable diaper according to claim 1. A side seal portion is formed by joining the both sides of the exterior body forming the front body extending from the crotch to the ventral side and the both sides of the exterior body forming the back body extending from the crotch to the back A pants-type disposable diaper having a waist opening for passing a trunk of a wearer and a pair of left and right leg openings for passing a leg, and an interior body including an absorber inside the exterior body. And
A longitudinal direction region having the side seal portion of at least one of the exterior body forming the front body and the exterior body forming the rear body is configured to elastically stretch in the width direction.
And an anti-slip opening is provided in the iliac crest abutting region which is the longitudinal region and abuts on the iliac crest region of the wearer.
In the longitudinal direction region having the side seal portion of the exterior body, (the width of the exterior body forming the front body) <(the width of the exterior body forming the rear body),
Further, in the side seal portion, at least a part of the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or is not attached at the time of attachment.
When the attaching / detaching portion is opened at the time of the attachment, the anti-slip opening portion is formed.
Pants type disposable diaper characterized by . A side seal portion is formed by joining the both sides of the exterior body forming the front body extending from the crotch to the ventral side and the both sides of the exterior body forming the back body extending from the crotch to the back A pants-type disposable diaper having a waist opening for passing a trunk of a wearer and a pair of left and right leg openings for passing a leg, and an interior body including an absorber inside the exterior body. And
A longitudinal direction region having the side seal portion of at least one of the exterior body forming the front body and the exterior body forming the rear body is configured to elastically stretch in the width direction.
And an anti-slip opening is provided in the iliac crest abutting region which is the longitudinal region and abuts on the iliac crest region of the wearer.
In the longitudinal direction region having the side seal portion of the exterior body, (the tensile force during elastic deformation of the exterior body forming the front body)> (tensile force during elastic deformation of the exterior body forming the rear body) And
Further, in the side seal portion, at least a part of the longitudinal direction is a bonding portion which is relatively weaker in bonding strength than the other regions, or is not attached at the time of attachment.
When the attaching / detaching portion is opened at the time of the attachment, the anti-slip opening portion is formed.
Pants type disposable diaper characterized by .