JP2018153309A - Disposable diaper - Google Patents

Abstract

Disclosed is a disposable diaper having excellent fit to a wearer's waist. A disposable diaper 1 having a belt member 11 attached to one side and the other side in the width direction x on the outer surface side of a diaper body 2, wherein the belt member 11 includes a front side fixing region 12 and a rear side fixing region 13. And a belt intermediate region 14 that is located between them and is not fixed to the diaper main body 2. A front boundary 15 between the front fixed region 12 and the belt intermediate region 14 is inward in the width direction x and outside in the front-rear direction y. The rear boundary line 16 between the rear fixed region 13 and the belt intermediate region 14 extends inward in the width direction x and outward in the front-rear direction y. The length L1 in the front-rear direction y from the front end of the front boundary line 15 to the rear end of the rear boundary line 16 is 50% of the length L2 of the diaper body 2 in the front-rear direction y. More than 95% is formed. [Selection] Figure 2

Description

  The present invention relates to a disposable diaper.

  Conventionally, various types of disposable diapers are known, and these disposable diapers are usually located between a front abdomen that is applied to the wearer's abdomen and a back part that is applied to the wearer's back and the wearer. The crotch part is applied to the crotch, and an absorber is provided in the crotch part. As a disposable diaper, for example, a pair of fastening members are provided on the left and right sides of the back portion, and a tape-type disposable diaper formed into a pants shape when worn by the fastening member, or the front and back portions are joined. A pants-type disposable diaper having a waist opening and a pair of leg openings is widely known. In addition to these, Patent Documents 1 to 3 disclose disposable diapers in which the front and back portions of the diaper main body are connected by a belt member. The disposable diapers disclosed in Patent Documents 1 to 3 are formed so that the front side edge and the rear side edge of the diaper main body include an inclined side portion extending outward in the width direction of the diaper and inward in the front-rear direction, Belt members are attached to the inclined sides of the front side edge and the rear side edge. By forming the disposable diaper in this way, the belt member can be positioned on the outer surface side of the diaper main body, or the belt member can be positioned around the waist of the wearer when wearing the diaper. It has become.

Japanese Patent Laid-Open No. 9-10261 JP-A-9-290003 JP 2004-236850 A

  Disposable diapers are required to prevent leakage of urine excreted from the wearer as a basic characteristic. Therefore, the disposable diaper is required to have an appropriate fit with respect to the wearer's crotch and waistline when worn. However, the disposable diapers disclosed in Patent Documents 1 to 3 have room for improvement in that respect.

  The present invention has been made in view of the above circumstances, and its purpose is a disposable diaper formed by connecting a front abdomen and a back part of a diaper body with a belt member, and has excellent fit to a wearer. It is to provide disposable diapers.

  The disposable diaper of the present invention capable of solving the above problems is a diaper body having a front abdomen and a back part in the front-rear direction and a crotch part positioned therebetween, and an absorber provided in the crotch part. A disposable diaper having a belt member attached to one side and the other side in the width direction on the outer surface side of the diaper body, the belt member being fixed to the front abdomen and the rear part And a belt intermediate region that is positioned between them and is not fixed to the diaper body. The front fixing region and the belt intermediate region are separated by a front boundary line, and the rear fixing region and the belt intermediate region are separated from each other. The region is divided by a rear boundary line, and the front boundary line is formed including a front inclined line extending inward in the width direction and outward in the front-rear direction, and the rear boundary line is formed in the width direction. In the front and back direction The length in the front-rear direction from the front end of the front boundary line to the rear end of the rear boundary line is 50% or more and 95% of the length in the front-rear direction of the diaper body. It has the following features.

  The disposable diaper of the present invention can cover a wide range from the abdomen side to the back side of the diaper body including the crotch of the wearer, and a belt intermediate region which is a non-fixed part of the belt member to the diaper body is a diaper body. Since the length is shorter than the length in the front-rear direction, the fit of the wearer around the waist can be improved. For example, in the disposable diapers disclosed in Patent Documents 1 to 3, the belt member is easily formed excessively long with respect to the length of the diaper main body in the front-rear direction, and there is a possibility that the diaper may shift around the waist of the wearer. In the disposable diaper of the present invention, since the belt member can appropriately fit around the waist of the wearer, when the diaper is worn, the disposable diaper is suitably held around the wearer's waist, and leakage of urine etc. It can be hard to happen.

  In the disposable diaper, when the angle formed by the front inclined line with respect to the front-rear direction is an angle α and the angle formed by the rear inclined line with respect to the front-rear direction is an angle β, both the angle α and the angle β are 45 °. It is preferably formed so as to be super 75 ° or less. If the belt member is attached to the diaper main body in this way, the belt member is formed to extend obliquely upward from the diaper main body when the diaper is worn. It is supported and the end part of the front-and-rear direction of a diaper main body becomes difficult to bend back to the outer surface side of a diaper.

  The front end of the front boundary line is located at least 10 mm inward in the front-rear direction from the front edge of the diaper body, and the rear end of the rear boundary line is at least 10 mm inward in the front-rear direction from the rear edge of the diaper body. Preferably it is located. If the belt member is attached to the diaper main body in this way, the length in the front-rear direction from the front end of the front boundary line to the rear end of the rear boundary line while balancing the front-rear position of the diaper main body. It becomes easy to form the diaper body to 95% or less of the length in the front-rear direction of the diaper body.

  It is preferable that the front side edge and / or the rear side edge of the diaper main body include a straight portion extending in the width direction, and the straight portion has 50% or more of the length in the width direction of the diaper main body. If the diaper main body is formed in this manner, the diaper main body can widely cover the wearer's belly side at the front side end portion or can widely cover the wearer's back side at the rear side end portion. In addition, the front fixing region and the rear fixing region of the belt member can be provided in a wider area, and the belt member can be firmly fixed to the diaper main body.

  The front fixing region and / or the rear fixing region of the belt member is preferably formed such that the length in the front-rear direction is longer on the outer side than the inner side in the width direction. The outer side in the width direction of the belt member is easily affected by the movement of the wearer's leg when the diaper is worn. Therefore, the length of the front side fixing region and / or the rear side fixing region in the front-rear direction is formed longer on the outer side in the width direction, and the front side fixing region and / or the rear side fixing region is formed on the outer side in the width direction. By forming the diaper so as to have a wider area, the belt member is less likely to peel from the diaper body when the diaper is worn.

  It is preferable that the absorbent body is provided so as to extend from the crotch portion to the front abdomen and / or the back portion, and the front boundary line and / or the rear boundary line overlap with the absorbent body. If the disposable diaper is formed in this way, the rigidity at the front boundary line and the rear boundary line of the diaper body is increased, and the diaper body is worn by the belt member at the front boundary line and the rear boundary line when wearing the diaper. Even if it is pulled, the diaper main body is not easily bent at the front boundary line or the rear boundary line.

  The belt member is preferably stretchable. By forming the belt member in this way, it becomes easier to improve the fit around the waist of the disposable diaper.

  The disposable diaper of the present invention can cover a wide range from the abdomen side to the back side of the diaper body including the wearer's crotch, and the belt member connecting the front and back parts of the diaper body to the diaper body Since the belt intermediate region which is a non-fixed region is formed with a length shorter than the length of the diaper body in the front-rear direction, it is possible to improve the fit of the wearer around the waist. Therefore, when the diaper is worn, the disposable diaper is suitably held around the wearer's waist, and leakage of urine and the like hardly occurs.

The front perspective view of the use condition of the disposable diaper of this invention is represented. The top view which looked at the disposable diaper from the back seat | sheet side in the state which cut | disconnected the belt member of the disposable diaper shown in FIG. 1, and expand | deployed planarly is represented. The top view which looked at the disposable diaper from the back seat | sheet side in the state which moved the belt member of the disposable diaper shown in FIG. 1 to the outer surface side of the diaper main body is represented. The top view which looked at the disposable diaper shown in FIG. 3 from the top sheet side is represented. The VV sectional view of the disposable diaper shown in Drawing 3 and Drawing 4 is expressed.

  The configuration of the disposable diaper according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments shown in the drawings. FIG. 1 shows a front perspective view of a disposable diaper in use, and FIG. 2 shows the disposable diaper viewed from the back sheet side in a state where the belt member of the disposable diaper shown in FIG. FIG. 3 is a plan view of the disposable diaper viewed from the back sheet side in a state where the front and back of the belt member of the disposable diaper shown in FIG. 1 is reversed and moved to the outer surface side of the diaper body. 4 shows a plan view of the disposable diaper shown in FIG. 3 as viewed from the top sheet side, and FIG. 5 shows a VV cross-sectional view of the disposable diaper shown in FIGS. 3 and 4. In the drawings of the present application, the arrow x represents the width direction, the arrow y represents the front-rear direction, and the direction perpendicular to the plane formed by the arrows x and y represents the thickness direction z. 2 to 4, the upper side of the drawing corresponds to the front side of the diaper, and the lower side of the drawing corresponds to the rear side of the diaper.

  The disposable diaper 1 has a diaper main body 2 and a belt member 11. The diaper main body 2 is a part that is worn so as to cover the crotch of the wearer when wearing the diaper, and the belt member 11 is a part that is worn so as to cover the left and right waists of the wearer when wearing the diaper. It is.

  The disposable diaper 1 and the diaper main body 2 have a front-rear direction y and a width direction x. The front-rear direction y corresponds to a direction extending in the front-rear direction of the wearer's crotch when the diaper is worn. The width direction x means a direction that is on the same plane as the disposable diaper 1 (particularly the diaper body 2) and is orthogonal to the front-rear direction y, and corresponds to the left-right direction of the wearer when wearing the diaper. The disposable diaper 1 also has a skin surface side and an outer surface side. The skin side means the side facing the wearer's skin when the diaper is worn, and the outer side means the side facing away from the wearer when the diaper is worn.

  The diaper main body 2 has a front abdomen P, a crotch R, and a back part Q with respect to the front-rear direction y. The front abdomen P corresponds to a portion applied to the wearer's stomach when wearing a diaper, and the back portion Q corresponds to a portion applied to the wearer's back when wearing a diaper. Moreover, the part which is located between the front part P and the back part Q, and hits a wearer's crotch is called the crotch part R. When the diaper body 2 is divided into three in the front-rear direction y, the front abdomen P, the crotch part R, and the back part Q are included in the front part P and the back part Q when the belt member 11 is fixed. A portion between the belt member 11 and the back portion Q where the belt member 11 is not fixed can be a crotch portion R.

  The diaper main body 2 is provided with an absorber 5 at the crotch R. The absorbent body 5 may be provided at least in the crotch portion R, and is preferably provided so as to extend from the crotch portion R to the front abdomen P and / or the back portion Q. In the diaper main body 2, the absorbent body 5 is preferably disposed between the top sheet 3 and the back sheet 4 with respect to the thickness direction z. The top sheet 3 is a sheet positioned on the wearer side when the diaper is worn, and is disposed on the skin surface side of the absorbent body 5. The top sheet 3 is preferably liquid permeable. The back sheet 4 is a sheet located on the opposite side to the wearer when the diaper is worn, that is, on the outer side, and is disposed on the outer surface side of the absorbent body 5. The backsheet 4 is preferably liquid-impermeable. Urine or the like excreted from the wearer passes through the top sheet 3 and is accommodated by the absorber 5, and the back sheet 4 prevents excrement from leaking to the outside.

  Examples of the liquid-permeable top sheet 3 include non-woven fabrics formed from hydrophilic fibers such as cellulose, rayon, and cotton, polyolefins (eg, polypropylene, polyethylene), polyesters (eg, PET), polyamides (eg, nylon). ), Etc., and the surface of the hydrophobic fiber is made hydrophilic by a surfactant, etc. can be used. Further, as the top sheet 3, a woven fabric, a knitted fabric, a perforated plastic film, or the like may be used.

  As the liquid-impermeable back sheet 4, a non-woven fabric formed from hydrophobic fibers such as polyolefin (for example, polypropylene, polyethylene), polyester (for example, PET), polyamide (for example, nylon), a plastic film, or the like is used. be able to. The back sheet 4 may be composed of a laminate of two or more sheets. For example, a laminate of a nonwoven fabric and a plastic film may be used. In this case, it suffices that at least one sheet constituting the laminated body is liquid-impermeable, and each sheet constituting the laminated body may be the same size or a different size. Liquid impermeability includes the meaning of water repellency.

  The absorber 5 will not be specifically limited if it contains the absorptive material which can absorb excrement, such as urine. As the absorbent body 5, for example, a molded body obtained by molding an absorbent material into a predetermined shape can be used. The absorbent body 5 may be covered with a covering sheet such as a paper sheet (for example, tissue paper or thin paper) or a liquid-permeable nonwoven fabric. Examples of the absorbent material include hydrophilic fibers such as pulp fibers, and water-absorbing resins such as polyacrylic acid, polyaspartic acid, cellulose, and starch / acrylonitrile. The water-absorbing material may include polyolefin fibers such as polyethylene and polypropylene, polyester fibers such as PET, and heat-fusible fibers such as polyamide fibers. These heat-fusible fibers may be hydrophilized with a surfactant or the like in order to increase the affinity with urine or the like.

  It is preferable that an absorptive material contains a hydrophilic fiber from the point which improves the absorption speed | rates, such as urine. Moreover, it is preferable that an absorptive material contains a water absorbing resin from the point which raises absorption capacity. Therefore, it is preferable that an absorber contains a hydrophilic fiber (especially pulp fiber) and a water absorbing resin. In this case, it is preferable to use, for example, a mixture of hydrophilic fibers mixed or dispersed in an aggregate of hydrophilic fibers.

  The absorber 5 may be a sheet-like absorber. Examples of the sheet-like absorber include those formed so as to have a water-absorbing resin between nonwoven fabrics and have no pulp fibers. Since the sheet-like absorbent body thus formed has a water-absorbing resin between the nonwoven fabrics, a high absorption capacity can be realized. Moreover, since a sheet-like absorber does not have pulp fibers between nonwoven fabrics, it can be formed thin without being bulky.

  The sheet-like absorber may be one using water-absorbing fibers as an absorbent material. Also in this case, the sheet-like absorbent body is not bulky and is formed thin. Examples of the water-absorbing fiber include a fiber containing a protonated or salt-formed carboxyl group. For example, a water-absorbing fiber can be obtained by hydrolyzing an acrylic fiber and converting a nitrile group contained in the acrylic fiber into a carboxyl group. At this time, it is preferable that the carboxyl group contained in the water-absorbing fiber forms an alkali metal salt or an ammonia salt. Moreover, a water absorbing fiber can be manufactured by immersing a hydrophilic fiber in acrylic acid and precipitating acrylic acid on the fiber surface.

  The shape (planar shape) of the absorber 5 is not particularly limited. What is necessary is just to determine the shape of the absorber 5 suitably according to a use, for example, a rectangle, an hourglass shape, a battledore shape etc. are mentioned. In addition, the absorber 5 is formed in the hourglass shape, ie, the shape where the intermediate part of the front-back direction y is constricted from the point which becomes difficult to distort even if it is pinched | interposed into a wearer's thigh and pressed in the width direction x. Is preferred.

  Rising flaps 6 are preferably provided on both sides in the width direction x of the top sheet 3 (see FIG. 5). By providing the rising flap 6, side leakage of excrement such as urine can be prevented. For example, the rising flap 6 joins side sheets 7 extending in the front-rear direction y to both sides of the top sheet 3 in the width direction x, and the rising elastic member 8 is disposed on the inner side of the side sheet 7 in the width direction x. It can be formed by providing. By providing the side seat 7 and the standing elastic member 8 in this way, the inner side in the width direction x of the side seat 7 rises toward the wearer's skin due to the contraction force of the standing elastic member 8, and the rising flap 6 is It is formed. The rising flap 6 or the side sheet 7 can be made of a sheet material that can be used for the back sheet 4, and is preferably made of a liquid-impermeable plastic film, a liquid-impermeable nonwoven fabric, or the like.

  The rising flap 6 (that is, the inner side in the width direction x of the side seat 7) may have the inner surface of the end portion in the front-rear direction y joined on the top sheet 3, thereby outward of the front-rear direction y of urine or the like. Leakage is prevented.

When using a nonwoven fabric as each sheet material demonstrated above, it is preferable to use a spun bond nonwoven fabric, an air through nonwoven fabric, a point bond nonwoven fabric, a melt blown nonwoven fabric, an airlaid nonwoven fabric, an SMS nonwoven fabric, etc. as a nonwoven fabric. Mass per unit area of each sheet is preferably from 10 g / ^{m 2} or more, 12 g / ^{m 2} or more, and also preferably 40 g / ^{m 2} or less, 30 g / ^{m 2} or less is more preferable.

  Leg elastic members extending in the front-rear direction y may be provided on both sides of the crotch portion R of the diaper main body 2 in the width direction x (not shown). By providing the leg elastic members, gathers can be formed around the legs of the wearer to improve the fit around the legs and to prevent side leakage. The leg elastic member is preferably provided so that at least a part thereof is positioned outward in the width direction x from the absorbent body 5.

  As an elastic member provided in the disposable diaper 1, an elastic stretchable material used for a normal disposable diaper such as a polyurethane thread, a polyurethane film, or natural rubber can be used. The elastic member is preferably attached in a stretched state using a known joining means such as an adhesive (for example, hot melt adhesive) or welding (for example, ultrasonic welding). For example, polyurethane yarn having a fineness of 40 to 1,240 dtex is stretched and arranged at a magnification of 1.1 to 5.0 times and fixed. As the joining means, a rubber-based hot melt adhesive is preferably used. The magnification is 1.0 in the non-expanded state.

  The shape (planar shape) of the diaper main body 2 is not particularly limited. Examples of the shape of the diaper main body 2 include a rectangle, an hourglass shape, and a battledore shape. The diaper main body 2 has an hourglass shape, that is, the crotch portion R is narrower than the front abdomen P and the back portion Q from the point that the diaper main body 2 is sandwiched between the thighs of the wearer and pressed in the width direction x. It is preferable to be formed.

  2 to 4, the diaper main body 2 includes a straight portion in which the front edge 9 and / or the rear edge 10 extend in the width direction x, and the straight portion is the length of the diaper main body 2 in the width direction x. It is preferable to have 50% or more of the thickness. If the diaper main body 2 is formed in this way, when the belt member 11 is attached to the outer surface side of the diaper main body 2 as described later, the front fixing region 12 and the rear fixing region 13 of the belt member 11 are wider. The belt member 11 can be firmly fixed to the diaper main body 2. The straight portion extending in the width direction x included in the front edge 9 and / or the rear edge 10 of the diaper body 2 preferably has a length of 60% or more of the length of the diaper body 2 in the width direction x. % Or more is more preferable, and 80% or more is more preferable. The front side edge 9 and / or the rear side edge 10 of the diaper main body 2 may all be formed from a straight line portion extending in the width direction x. The diaper body 2 also preferably has both the front edge 9 and the rear edge 10 having the straight portions. In addition, the length of the linear part demonstrated here means the length which a linear part extends continuously. Moreover, it is preferable that a linear part is formed so that the center of the width direction x of the diaper main body 2 may be passed.

  In the present invention, various lengths, positions, and angles of the disposable diaper are in a state in which the elastic member provided in the disposable diaper (when the elastic member is provided in the disposable diaper) is fully extended, that is, the elastic member is removed. Or it measures in the state which cut | disconnects an elastic member finely and does not express the contractile force of an elastic member.

  Belt members 11 are attached to the outer surface side of the diaper main body 2 on one side and the other side in the width direction x, respectively. Specifically, the right belt member 11 </ b> A and the left belt member 11 </ b> B are attached to the outer surface side of the diaper main body 2. In the disposable diaper 1 shown in the drawings, the outer surface side of the diaper main body 2 is composed of a back sheet 4, and a belt member 11 is attached to the back sheet 4. The belt member 11 is attached so as to connect the front abdomen P and the back part Q of the diaper main body 2, and a waist opening for passing the wearer's torso by the front abdomen P, the back part Q, the right belt member 11A and the left belt member 11B. A leg opening for allowing the wearer's leg to pass through can be formed by the crotch R and the right belt member 11A or the left belt member 11B.

  The belt member 11 has one side in the front-rear direction y fixed to the front abdomen P and the other side in the front-rear direction y fixed to the back part Q. The belt member 11 includes a front side fixing region 12 fixed to the front abdomen P, a rear side fixing region 13 fixed to the back portion Q, and a belt intermediate region 14 positioned between them and not fixed to the diaper body 2. The front fixed region 12 and the belt intermediate region 14 are separated by a front boundary line 15, and the rear fixed region 13 and the belt intermediate region 14 are separated by a rear boundary line 16. In FIG. 3, the front side fixing region 12 and the rear side fixing region 13 are indicated by cross hatching. The front boundary line 15 is formed so as to include an inclined line that extends inward in the width direction x and outward in the front-rear direction y (hereinafter, the inclined line is referred to as “front inclined line”). The side boundary line 16 is formed so as to include an inclined line that extends inward in the width direction x and outward in the front-rear direction y (hereinafter, the inclined line is referred to as “rear-side inclined line”). By attaching the belt member 11 to the diaper main body 2 as described above, the belt member 11 is positioned on the outer surface side of the diaper main body 2 (back sheet 4) as shown in FIG. 3, or the belt member 11 is shown in FIG. The belt member 11 can be positioned around the waist of the disposable diaper 1 as shown in FIG. 1 and FIG. As shown in FIG. 3, the disposable diaper 1 can be easily manufactured by attaching the belt member 11 so as to overlap the outer surface side of the diaper main body 2 at the time of manufacture.

  The belt member 11 may be made of a sheet material that can be used for the top sheet 3 and the back sheet 4. The belt member 11 may be stretchable. In this case, the belt member 11 may be provided with an elastic member (belt elastic member), or the belt member 11 may be formed of an elastic sheet. In the former case, the belt member 11 is configured by, for example, an elastic member disposed between nonwoven fabrics.

  The front side fixing region 12 and the rear side fixing region 13 of the belt member 11 are regions where the belt member 11 is fixed to the diaper body 2, and the belt member 11 may be fixed to the diaper body 2 by a known joining means. . The front side fixing region 12 and the rear side fixing region 13 of the belt member 11 may be adhered to the diaper main body 2 with an adhesive, for example, or may be welded to the diaper main body 2 by heat sealing or ultrasonic welding. These may be used in combination. On the other hand, the belt intermediate region 14 is located between the front side fixing region 12 and the rear side fixing region 13 of the belt member 11, and the belt member 11 is not fixed to the diaper main body 2 in this region.

  In the front side fixing region 12 and the rear side fixing region 13, the belt member 11 may be joined to the diaper main body 2 over the entire area, and the belt member 11 is partially (for example, in a predetermined joining pattern) the diaper main body. 2 may be joined. When the belt member 11 is joined to the diaper main body 2 with an adhesive, the adhesive may be applied to the entire surface in the front side fixing region 12 and the rear side fixing region 13, or a predetermined shape such as a net shape, a line shape, or a dotted shape may be used. It may be applied in a pattern. For example, when the adhesive is applied in a linear adhesive pattern, the linear adhesive pattern may be linear or curved (for example, meandering linear or spiral). A combination of these may be used.

  The front fixed region 12 is formed so that the rear edge of the front-rear direction y defines the front boundary line 15, and the rear fixed region 13 is formed such that the front edge of the front-rear direction y defines the rear boundary line 16. It is formed. The front boundary line 15 is formed including a front inclined line extending inward in the width direction x and outward in the front-rear direction y, and the belt member 11 is formed so as to be able to be folded back along the front inclined line. The rear boundary line 16 is formed including a rear inclined line extending inward in the width direction x and outward in the front-rear direction y, and the belt member 11 is formed to be foldable along the rear inclined line. When the belt member 11 is not folded back at the front and rear slope lines, the belt intermediate region 14 is arranged so as to overlap the crotch portion R of the diaper body 2 and is folded along the front slope line and the rear slope line. Thus, the belt intermediate region 14 can be positioned around the waist of the disposable diaper 1. In order to facilitate the folding of the belt member 11, it is preferable that the front boundary line 15 is formed by 70% or more of the front inclined line, and the ratio is more preferably 80% or more, and 90%. The above is more preferable. As shown in FIGS. 2 and 3, the front boundary line 15 is particularly preferably formed entirely from a front inclined line. Similarly, it is preferable that 70% or more of the total length of the rear boundary line 16 is formed from the rear inclined line, and the ratio is more preferably 80% or more, and further preferably 90% or more. As shown in FIGS. 2 and 3, the rear boundary line 16 is particularly preferably formed entirely from a rear inclined line. In terms of facilitating formation of the front boundary line 15 and the rear boundary line 16 in a desired shape including the front inclined line or the rear inclined line, the belt member is formed by the front boundary line 15 and the rear boundary line 16. It is preferable that 11 is welded to the diaper main body 2.

  The front side fixing region 12 is preferably provided to extend to the front side edge of the belt member 11 or the vicinity thereof. Therefore, the front side edge of the front side fixing region 12 is preferably within a region within 15 mm from the front side edge of the belt member 11, more preferably within 10 mm, and even more preferably within 5 mm. Moreover, it is preferable that the whole front side edge of the front side fixed area | region 12 exists in such an area | region. The rear side fixing region 13 is preferably provided so as to extend to the rear side edge of the belt member 11 or the vicinity thereof. Accordingly, the rear side edge of the rear side fixing region 13 is preferably in a region within 15 mm from the rear side edge of the belt member 11, more preferably within 10 mm, and further preferably within 5 mm. Further, it is preferable that the entire rear edge of the rear fixing region 13 is in such a region.

  The length of the front fixed region 12 in the front-rear direction y is 5 mm or more longer than the length of the front boundary line 15 in the front-rear direction y (length in the front-rear direction y from the front end to the rear end of the front boundary line 15). It is preferably 10 mm or more, more preferably 15 mm or more. Similarly, the length in the front-rear direction y of the rear fixed region 13 is the length in the front-rear direction y of the rear boundary line 16 (the length in the front-rear direction y from the front end to the rear end of the rear boundary line 16). ) Is preferably 5 mm or more, more preferably 10 mm or more, and even more preferably 15 mm or more. Thus, if the front side fixing region 12 and the rear side fixing region 13 are provided, the belt member 11 is easily fixed firmly to the diaper main body 2. On the other hand, the upper limit of the length in the front-rear direction y of each of the front side fixing region 12 and the rear side fixing region 13 is not particularly limited, but may be, for example, 250 mm or less, or 200 mm or less. Further, the length in the width direction x of each of the front side fixing region 12 and the rear side fixing region 13 is preferably 70% or more of the length in the width direction x of the belt member 11, more preferably 80% or more, 90% or more is more preferable.

The belt intermediate region 14 is a portion formed in the belt member 11 so as to be movable with respect to the diaper main body 2 with the front boundary line 15 and the rear boundary line 16 as a base point. When the disposable diaper 1 is worn, It is used so that it may be located around the waist of a person. In the disposable diaper 1, the length in the front-rear direction y of the belt intermediate region 14 is shorter than the length in the front-rear direction y of the diaper body 2, specifically, from the front end of the front boundary line 15 to the rear boundary. The length L ₁ in the front-rear direction y to the rear end of the line 16 is formed to be 95% or less of the length L _{2 in} the front-rear direction y of the diaper body 2. By configuring the disposable diaper 1 in this way, the diaper body 2 covers a wide range from the abdomen side to the back side including the wearer's crotch, and is shorter than the length of the diaper body 2 in the front-rear direction y. The belt intermediate region 14 formed in this way can enhance the fit around the waist of the wearer. Therefore, when the diaper is worn, the disposable diaper 1 is suitably held between the wearer's crotch and around the waist, and leakage of urine and the like is less likely to occur. The length L ₁ in the front-rear direction y from the front end of the front boundary line 15 to the rear end of the rear boundary line 16 is preferably 93% or less of the length L _{2 in} the front-rear direction y of the diaper body 2, and 90% The following is more preferable, and 87% or less is more preferable. On the other hand, the length L ₁ in the front-rear direction y from the front end of the front boundary line 15 to the rear end of the rear boundary line 16 from the point of securing the waist length of the disposable diaper ₁ is The length L _{2 in} the front-rear direction y is preferably 50% or more, more preferably 60% or more, still more preferably 70% or more, and even more preferably 75% or more. The length in the front-rear direction y from the front end of the front boundary line 15 to the rear end of the rear boundary line 16 is the distance from the foremost part of the rear side edge of the front side fixed area 12 to the front side edge of the rear side fixed area 13. It means the length to the last part.

When the disposable diaper 1 is configured as described above, the belt member 11 is positioned such that the front end of the front boundary line 15 is inward (that is, rearward) in the front-rear direction y with respect to the front edge 9 of the diaper body 2, The rear end of the rear boundary line 16 is positioned on the inner side (that is, the front side) in the front-rear direction y with respect to the rear edge 10 of the diaper main body 2, or is attached to the diaper main body 2 so as to satisfy both of them. . Preferably, the belt member 11 is attached to the diaper main body 2 so as to satisfy both of them. If the belt member 11 is attached to the diaper main body 2 in this way, from the front end of the front boundary line 15 to the rear end of the rear boundary line 16 while balancing the position of the diaper main body 2 in the front-rear direction y. It is easy to form the length L ₁ in the front-rear direction y to 95% or less of the length L _{2 in} the front-rear direction y of the diaper body 2. In this case, the front side edge of the front boundary line 15 is located 10 mm or more inward in the front-rear direction y than the front edge 9 of the diaper body 2 (more preferably 20 mm or more, more preferably 30 mm or more inward). It is preferable that the rear end of the rear boundary line 16 is 10 mm or more inward in the front-rear direction y from the rear edge 10 of the diaper body 2 (more preferably 20 mm or more inward, more preferably 30 mm or more inward. ). In addition, the length from the front edge 9 of the diaper body 2 of the front boundary of the front boundary line 15 described here is a straight line extending in the front-rear direction y starting from the front edge of the front boundary line 15. This means the length of the straight line until the edge 9 is reached. Similarly, the length of the rear end of the rear boundary line 16 from the rear edge 10 of the diaper body 2 is a straight line extending in the front-rear direction y starting from the rear end of the rear boundary line 16. This means the length of the straight line until the rear edge 10 is reached.

  The front boundary line 15 and / or the rear boundary line 16 are preferably formed so as to overlap the absorber 5. If the front boundary line 15 and / or the rear boundary line 16 are thus formed, the rigidity of the diaper body 2 at the front boundary line 15 and the rear boundary line 16 is increased. Therefore, even when the diaper body 2 is pulled by the belt member 11 at the front boundary line 15 or the rear boundary line 16 when the diaper is worn, the diaper body 2 is not easily bent at the front boundary line 15 or the rear boundary line 16. , The feeling of wearing diapers is improved. Preferably, both the front boundary line 15 and the rear boundary line 16 are formed so as to overlap the absorber 5. Further, from the viewpoint of stably fixing the belt member 11 to the diaper main body 2, the front side fixing region 12 and / or the rear side fixing region 13 is preferably formed so as to overlap the absorber 5. More preferably, both side fixing regions 13 are formed so as to overlap the absorber 5.

  The belt member 11 is preferably provided such that, for example, the rear end of the rear boundary line 16 is positioned inward in the front-rear direction y of the diaper body 2 with respect to the front end of the front boundary line 15. In this case, the separation distance from the rear edge 10 of the diaper body 2 at the rear end of the rear boundary line 16 is longer than the separation distance from the front edge 9 of the diaper body 2 at the front end of the front boundary line 15. Will be. In addition, the said separation distance means the separation distance with respect to the front-back direction y, and the case where a separation distance is 0 mm is also included. If the belt member 11 is attached to the diaper main body 2 in this manner, when the diaper is worn, the back side of the wearer is more easily covered by the diaper main body 2 than the abdomen side of the wearer. Therefore, when the wearer takes a forward bending posture, the diaper body 2 is less likely to be disturbed on the wearer's ventral side, and when the wearer is sleeping in the supine position, Leakage of excrement is less likely to occur.

  The belt member 11 may be provided such that the front end of the front boundary line 15 is positioned inward in the front-rear direction y of the diaper body 2 with respect to the rear end of the rear boundary line 16. In this case, the separation distance from the front edge 9 of the diaper body 2 at the front end of the front boundary line 15 is longer than the separation distance from the rear edge 10 of the diaper body 2 at the rear end of the rear boundary line 16. Will be. Thus, if the belt member 11 is attached to the diaper main body 2, the front abdominal part P of the diaper main body 2 will be pulled up along the ridge part, and the adhesiveness to the wearer's stomach side of the diaper main body 2 will be improved. It becomes easy. Therefore, the diaper main body 2 is not easily disturbed on the stomach side of the wearer, and the wearer can easily move the leg.

  The front side fixing region 12 and / or the rear side fixing region 13 is preferably formed such that the length in the front-rear direction y is longer on the outer side than the inner side in the width direction x. The outer side in the width direction x of the belt member 11 is easily affected by the movement of the wearer's leg when the diaper is worn. Therefore, the length in the front-rear direction y of the front side fixing region 12 and / or the rear side fixing region 13 is formed longer on the outer side in the width direction x so that the front side fixing region 12 and / or the rear side fixing region 13 has a width. By forming so that it may become a larger area on the outer side in the direction x, the belt member 11 can be made difficult to peel from the diaper body 2 when the diaper is worn. Preferably, both the front side fixed region 12 and the rear side fixed region 13 are formed such that the length in the front-rear direction y is longer on the outer side than the inner side in the width direction x.

  The rear fixed region 13 is preferably formed with a larger area than the front fixed region 12. In the disposable diaper 1, when the wearer takes a bending posture toward the front side, the back side portion is stretched, and in this case, the force with which the belt member 11 peels from the diaper main body 2 easily acts on the rear side fixing region 13. Become. This tends to be a greater force than the peeling force that acts on the front fixed region 12 when the wearer takes a posture of leaning back. Therefore, by providing the rear side fixing region 13 with a larger area than the front side fixing region 12, the belt member 11 can be stably fixed to the diaper main body 2 in a stable manner.

  The belt member 11 is preferably attached to the diaper body 2 so that the belt intermediate region 14 extends obliquely upward when the diaper is worn. Specifically, the angle formed by the front inclined line of the front boundary line 15 with respect to the front-rear direction y is an angle α, and the angle formed by the rear inclined line of the rear boundary line 16 with respect to the front-rear direction y is an angle β. In this case, it is preferable that both the angle α and the angle β are more than 45 ° and 75 ° or less. If the belt member 11 is attached to the diaper main body 2 in this manner, when the diaper is worn, the end portion in the front-rear direction y of the diaper main body 2 (in the diaper main body 2 than the front boundary line 15 and the rear boundary line 16 The portion located outside in the front-rear direction y) is supported by the belt member 11, and the end of the diaper body 2 in the front-rear direction y is less likely to be folded back to the outer surface side of the diaper. Moreover, the diaper main body 2 becomes a form suspended by the belt member 11, and when the diaper is worn, the diaper is less likely to slip off. Furthermore, it becomes easy to form a leg opening formed by the crotch portion R of the diaper main body 2 and the belt member 11 in a large size. Angle α and angle β are more preferably 48 ° or more, further preferably 50 ° or more, more preferably 70 ° or less, and further preferably 65 ° or less.

  The angle α and the angle β may be the same or different. For example, when the angle α is larger than the angle β, the leg opening of the disposable diaper 1 is more easily formed on the front side than the rear side, and the wearer can easily move the leg when wearing the diaper. In addition, since the front abdomen P of the diaper body 2 is pulled up along the throat part, the diaper body 2 is easily brought into close contact with the abdomen of the wearer. Makes it easier for the wearer to move the legs. On the other hand, when the angle β is larger than the angle α, the back portion Q of the diaper main body 2 is pulled up along the buttock, so that the diaper main body 2 is easily brought into close contact with the buttock of the wearer. Therefore, the leakage of excrement from the back side of the diaper can be made difficult to occur.

  The belt member 11 is preferably stretchable from the viewpoint of improving the fit around the waist of the disposable diaper 1. In this case, the belt member 11 preferably has elasticity in the front-rear direction y at least in the belt intermediate region 14. In order to form the belt member 11 in this manner, it is preferable to provide a belt elastic member extending in the front-rear direction y in at least the belt intermediate region 14 of the belt member 11.

  When the belt member 11 is provided with a belt elastic member and the leg elastic member is provided on both sides in the width direction x of the diaper main body 2, the belt elastic member is provided with a stronger contraction force than the leg elastic member. Is preferred. By providing the elastic member for the belt and the elastic member for the leg in this manner, when the diaper is worn, the fit around the waist of the wearer is enhanced, and the elastic member for the leg is hard to hit strongly around the wearer's leg. It can improve the wearing feeling of diapers. In addition, the contraction force of each elastic member is measured as follows. First, the elastic member attached to the disposable diaper is stretched, and the stretched length L of the elastic member is measured with the disposable diaper fully expanded as shown in FIG. Next, the contraction force of the elastic member is obtained by measuring the contraction force when the elastic member is removed from the disposable diaper and extended to the length L. When a plurality of elastic members are provided, the contraction force of the plurality of elastic members is obtained.

  The length of the belt member 11 in the front-rear direction y is preferably formed to be the same as or shorter than the length of the diaper body 2 in the front-rear direction y. When the belt member 11 has stretchability, it is preferable that the length in the front-rear direction y in a state where the belt member 11 is extended is formed in this way.

  The length in the width direction x of the belt member 11 (the length in the width direction x of each of the right belt member 11A and the left belt member 11B) is preferably 50% or less of the length in the width direction x of the diaper body 2. The right belt member 11A and the left belt member 11B are preferably provided in the diaper body 2 so as not to overlap each other. The right belt member 11 </ b> A and the left belt member 11 </ b> B are also preferably provided to be separated by 3% or more of the length of the diaper body 2 in the width direction x. If the belt member 11 is thus provided, the diaper main body 2 is pulled in the width direction x by the belt member 11 when the diaper is worn, and the diaper main body 2 is in the width direction x on the wearer's belly side or back side. It becomes easy to spread. The length of the belt member 11 in the width direction x is preferably 20% or more of the length of the diaper body 2 in the width direction x, more preferably 30% or more, and even more preferably 35% or more. Further, the separation distance between the right belt member 11A and the left belt member 11B is more preferably 5% or more of the length of the diaper body 2 in the width direction x, preferably 50% or less, and more preferably 40% or less. 30% or less is more preferable. The separation distance between the right belt member 11A and the left belt member 11B described here means a separation distance at a portion where the right belt member 11A and the left belt member 11B are closest to each other in the width direction x.

  The belt member 11 is preferably formed in a rectangular shape, for example. In this case, the production of the disposable diaper 1 can be simplified. The belt member 11 is also formed in a shape in which the inner edge in the width direction x of the belt intermediate region 14 swells outward in the width direction x with the belt intermediate region 14 positioned on the outer surface side of the diaper body 2. It is also preferable. In this case, the belt intermediate region 14 is formed so as to include, for example, a portion where the inner edge in the width direction x is curved outward in the width direction x. The inner edge of the belt intermediate region 14 in the width direction x forms the upper edge of the belt member 11 around the waist of the wearer when the diaper is worn, so by forming the belt intermediate region 14 in this way, When the diaper is worn, the upper edge of the belt member 11 is less likely to be bent downward, and the wearing feeling of the diaper can be improved.

1: Disposable diaper 2: Diaper body 3: Top sheet 4: Back sheet 5: Absorbent body 11: Belt member, 11A: Right side belt member, 11B: Left side belt member 12: Front side fixing area 13: Rear side fixing area 14: Belt Intermediate area 15: Front boundary 16: Rear boundary

Claims (7)

A diaper body having a front abdomen and a back part in the front-rear direction and a crotch part located between them, and an absorber provided in the crotch part,
A disposable diaper having a belt member attached to one side and the other side in the width direction of the outer surface side of the diaper body,
The belt member has a front side fixing region fixed to the front abdomen, a rear side fixing region fixed to the back part, and a belt intermediate region located between them and not fixed to the diaper body. The front fixed region and the belt intermediate region are separated by a front boundary line, and the rear fixed region and the belt intermediate region are separated by a rear boundary line,
The front boundary line is formed including a front inclined line extending inward in the width direction and outward in the front-rear direction,
The rear boundary line is formed including a rear inclined line extending inward in the width direction and outward in the front-rear direction,
The length in the front-rear direction from the front end of the front boundary line to the rear end of the rear boundary line is not less than 50% and not more than 95% of the length in the front-rear direction of the diaper body. Disposable diapers.   When the angle formed by the front inclined line with respect to the front-rear direction is an angle α and the angle formed by the rear inclined line with respect to the front-rear direction is an angle β, both the angle α and the angle β are 45 °. The disposable diaper according to claim 1, wherein the disposable diaper is super 75 ° or less. The front end of the front boundary line is located 10 mm or more inward in the front-rear direction than the front edge of the diaper body,
The disposable diaper according to claim 1 or 2, wherein a rear end of the rear boundary line is located inward by 10 mm or more in the front-rear direction with respect to a rear edge of the diaper main body.   The front side edge and / or the rear side edge of the diaper body includes a straight part extending in the width direction, and the straight part has 50% or more of the length of the diaper body in the width direction. The disposable diaper as described in any one item.   The front side fixing region and / or the rear side fixing region of the belt member are formed such that the length in the front-rear direction is longer on the outer side than the inner side in the width direction. The disposable diaper as described in any one of.   The absorbent body is provided so as to extend from the crotch portion to the front abdomen and / or the back portion, and the front boundary line and / or the rear boundary line overlap with the absorbent body. The disposable diaper as described in any one of -5.   The disposable diaper according to any one of claims 1 to 6, wherein the belt member is stretchable.

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