JP2018153310A - Folded disposable diaper and production method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable diaper in which a preabdomen part and a back part of a diaper body are connected with a belt member, which allows a user to use easily.SOLUTION: There is provided a folded disposable diaper 1, in which the disposable diaper 1 is configured so that, on an outer surface side of a diaper body 2, each flexible belt member 11 jointed to a preabdomen part P and a back part Q is provided on each of one side and the other side in a width direction x of the diaper body 2, the diaper body 2 is configured so that the preabdomen part P, a crotch part R, and the back part Q are arranged in a cross direction y and in the state, both side parts in the width direction x are folded in a state in which a skin surface side is inside, and both side parts are folded to the cross direction y in a state in which the skin surface side is inside.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a folded disposable diaper and a method for manufacturing the same.

  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 at least on 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 body are connected via 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, A stretchable belt member is attached to the inclined side portions 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

  The disposable diapers disclosed in Patent Documents 1 to 3 can be easily manufactured by attaching the belt member to the outer surface side of the diaper body during manufacture. However, the disposable diaper formed in this way is significantly different in shape from the disposable diaper in the actual use state, so how to use the disposable diaper when packing the disposable diaper as a product etc. It is desirable to fold it so that it can be easily understood. This invention is made | formed in view of the said situation, The objective is a disposable diaper with which the front part and back part of the diaper main body were connected via the belt member, Comprising: A user can use it easily. Disclosed is a disposable diaper folded and a manufacturing method thereof.

  The disposable diaper of the present invention that has solved the above-mentioned problems is a folded disposable diaper; the disposable diaper has a front part, a back part, and a crotch part located between them in the front-rear direction. A stretchable belt member joined to the front and back portions of the main body is provided on one side and the other side in the width direction of the diaper main body; A fixed front side fixing region; a rear side fixing region fixed to the back portion; and a belt intermediate region positioned between them and not fixed to the diaper body, wherein the front fixing region and the belt intermediate region are front side boundaries. 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. Is; The side boundary line is formed including a rear slant line extending inward in the width direction and outward in the front-rear direction; the diaper body is deployed with the front, abdomen, crotch, and back portion aligned in the front-rear direction In this state, both sides in the width direction are folded back with the skin side facing inward, and are further folded between the front boundary line and the rear boundary line with the skin side facing inward in the front-rear direction. Have.

  The disposable diaper of the present invention is configured by attaching an elastic belt member joined to the front abdomen and the back part on the outer surface side of the diaper body, and the diaper body includes the front part, the crotch part and the back part in front and back. Since both sides in the width direction are folded back with the skin side inside, and folded back with the skin side inward in the front-rear direction, the disposable diaper is folded. It can be easily transformed into a use state. When the contraction force of the belt member acts strongly in the state where the disposable diaper is folded, the belt middle region of the belt member is not positioned so as to overlap the folded diaper body, but in the width direction of the folded diaper body. By shifting so as to be located outward, the disposable diaper can be stably folded. Therefore, the disposable diaper of the present invention is excellent in handleability.

  It is preferable that the diaper main body is folded at both fold lines at a fold line that intersects the front boundary line and / or the rear boundary line. In this case, since the belt member is folded back in the width direction together with the diaper main body, the belt member is easily held by the folded diaper main body. Therefore, when the disposable diaper is folded, the belt member does not protrude greatly from the diaper main body, and the handleability of the folded disposable diaper is improved.

  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 thus formed, the disposable diaper is easily folded into a substantially rectangular shape, and the handleability of the folded disposable diaper is improved.

  The angle α and the angle β are both 40 ° or more and 75 ° or less when the angle formed by the front inclined line with respect to the front-rear direction is the angle α and the angle formed by the rear inclined line with respect to the front-rear direction is the angle β. It is preferable that If the belt member is attached to the diaper body in this way, the belt intermediate region is formed so as to extend substantially horizontally or obliquely upward when the diaper is worn, and when the diaper is worn, This makes it easier for diapers to be held stably.

  It is preferable that the diaper main body is provided with an absorbent body extending from the crotch part to the front abdomen and / or the back part, 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, even when the belt member contracts in the front-rear direction when folding the disposable diaper, the diaper main body is not easily bent at the front boundary line or the rear boundary line, and the disposable diaper is folded. It becomes easy.

  The present invention also provides a method of manufacturing a folded disposable diaper. The method for producing a folded disposable diaper according to the present invention includes: a disposable diaper is arranged on the outer surface side of a diaper main body having a front part, a back part, and a crotch part located between them in the front-rear direction; A joined elastic belt member is provided on one side and the other side of the diaper body in the width direction; the belt member is fixed to the front abdomen, and the belt member is fixed to the back part A side fixing region 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 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 inward in the width direction and front-rear. Heading out of the direction The diaper main body is developed with the front abdomen, the crotch part, and the back part aligned in the front-rear direction, and the belt intermediate region of the belt member is superimposed on the outer surface side of the diaper main body. A first folding step in which both sides of the diaper main body in the width direction are folded with the skin side inward; after the first folding step, the diaper main body is placed between the front boundary line and the rear boundary line. And a second folding step of folding the skin side inward in the front-rear direction. According to the manufacturing method of the disposable diaper of this invention, the folded disposable diaper of this invention can be manufactured easily.

  The disposable diaper of the present invention is configured by attaching an elastic belt member joined to the front abdomen and the back part on the outer surface side of the diaper body, and the diaper body includes the front part, the crotch part and the back part in front and back. Since both sides in the width direction are folded back with the skin side inside, and folded back with the skin side inward in the front-rear direction, the disposable diaper is folded. The disposable diaper can be easily deformed from a folded state to a used state. Therefore, the disposable diaper of the present invention is excellent in handleability. Moreover, according to the manufacturing method of the disposable diaper of this invention, the folded disposable diaper of this invention can be manufactured easily.

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 top view of the diaper which showed the folding | turning position at the time of folding the disposable diaper shown in FIG. 3 is represented. The top view of the state which folded the disposable diaper shown in FIG. 6 into three in the width direction is represented. An example of the top view of the state which folded the disposable diaper shown in FIG. 7 further in the front-back direction is represented. The other example of the top view of the state which folded the disposable diaper shown in FIG. 7 further in the front-back direction is represented.

  The present invention relates to a folded disposable diaper, and more specifically, a disposable diaper in which a front abdomen and a back part of a diaper main body are connected via a belt member is folded at a predetermined folding line. The present invention relates to a folded disposable diaper.

  First, the structure of the disposable diaper used by this invention is demonstrated with reference to 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 body 2 is preferably provided with an absorbent body 5 at the crotch portion R, and more preferably, the absorbent body 5 extends 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, it is preferable that the absorber 5 is formed in the hourglass shape 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. That is, it is preferable that the absorber 5 has a front side part, a rear side part, and an intermediate part between them in the front-rear direction y, and the intermediate part is formed narrower than the front side part and the rear side part.

  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. In addition, it is preferable that the diaper main body 2 is formed in the hourglass shape 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. That is, the crotch portion R is preferably formed narrower than the front abdomen P and the back portion Q.

  On the outer surface side of the diaper main body 2, belt members 11 are provided 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 provided on 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 joined to the front abdomen P and the back part Q of the diaper main body 2 and is connected to the front part P and the back part Q. A waist opening for passing the wearer's torso can be formed by the front abdomen P, the back part Q, the right belt member 11A and the left belt member 11B, and the crotch R and the right belt member 11A or the left belt member 11B. The leg opening for passing the wearer's leg can be formed.

  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 as shown in FIG. 3, or the belt member 11 is moved from the state 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.

  The belt member 11 has stretchability, which can enhance the fit of the disposable diaper 1 around the waist. The stretchable belt member 11 can be formed, for example, by arranging an elastic member on the sheet material or by constituting the belt member 11 from an elastic sheet. As the sheet material, a sheet material usable for the top sheet 3 and the back sheet 4 can be used. The belt member 11 only needs to be stretchable in the front-rear direction y at least in the belt intermediate region 14. For example, the belt member 11 is formed by providing at least a belt elastic member extending in the front-rear direction y in the belt intermediate region 14. What is necessary is just to form.

  When leg elastic members are provided on both sides of the diaper body 2 in the width direction x, the belt elastic member is preferably provided with a stronger contraction force than the leg elastic member. 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. The length in the front-rear direction y of the belt member 11 means the length in a state where the belt member 11 is extended.

  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 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. The belt member 11 is preferably attached to the diaper body 2 so that the belt intermediate region 14 extends substantially horizontally or 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 40 ° or more and 75 ° or less. If the belt member 11 is attached to the diaper main body 2 in this way, the diaper is easily held stably around the wearer's waist when the diaper is worn. The belt member 11 is preferably attached so that the belt intermediate region 14 extends obliquely upward when the diaper is worn, whereby the diaper main body 2 is suspended by the belt member 11, and the disposable diaper 1 is worn by the wearer. It becomes easy to be stably held between the crotch. Moreover, it becomes easy to form the leg opening part formed of the crotch part R of the diaper main body 2 and the belt member 11 large. In this case, the angle α and the angle β are preferably larger than 45 °, more preferably 48 ° or more, further preferably 50 ° or more, more preferably 70 ° or less, and further preferably 65 ° or less. Angle α and angle β may be the same or different.

  In the present invention, various lengths, positions and angles of the disposable diaper are contracted in a state in which the elastic member provided in the disposable diaper is completely extended, that is, in a state where the elastic member is removed or the elastic member is finely cut. Measure in the absence of force.

  As shown in FIG. 3, the disposable diaper 1 formed as described above can be easily manufactured by attaching the belt member 11 so as to overlap the outer surface side of the diaper body 2 at the time of manufacture. For example, the conveyance direction of the diaper main body 2 when the diaper main body 2 is manufactured (including the conveyance direction of the top sheet 3 and the back sheet 4), and the conveyance direction of the belt member 11 when the belt member 11 is attached to the diaper main body 2. By making these coincide, it is possible to simplify the manufacturing equipment. However, since the shape of the disposable diaper in the state shown in FIG. 3 is greatly different from the disposable diaper in the used state as shown in FIG. 1, the disposable diaper is changed from the manufacturing state to the state of the product (for example, packed state). It is desirable to make the disposable diaper as close to the shape of use as possible while folding it compactly. By folding the disposable diaper in this way, the user can easily use the disposable diaper, and the handleability of the disposable diaper can be improved.

  Therefore, in the present invention, the disposable diaper is folded in three in the width direction, and further folded in the front-rear direction, thereby improving the handleability of the disposable diaper. This will be described with reference to FIGS. 6 shows a plan view of the diaper showing the folding position when the disposable diaper is folded, taking the disposable diaper shown in FIG. 3 as an example, and FIG. 7 folds the disposable diaper shown in FIG. 6 in the width direction. 8 and 9 show plan views of the disposable diaper shown in FIG. 7 that is further folded in the front-rear direction. 6-9, the front side fixed area | region 12 and the rear side fixed area | region 13 are shown by cross hatching.

  As shown in FIG. 6, the disposable diaper 1 is developed such that the diaper main body 2 is arranged such that the front abdomen P, the crotch R, and the back part Q are aligned in the front-rear direction y, and the belt member 11 is disposed on the outer surface side of the diaper main body 2. In the state where the belt intermediate region 14 is overlapped, as shown in FIG. 7, both side portions of the diaper body 2 in the width direction x are folded back with the skin surface side inward (first folding step). Specifically, when the diaper main body 2 is divided into three in the width direction x and divided into both side portions in the width direction x and a central portion therebetween, the diaper main body 2 is unfolded (that is, the front abdomen P and the crotch portion). With the R and the back portion Q deployed in this order so as to be aligned in the front-rear direction y), both side portions of the diaper body 2 in the width direction x are folded back with the skin surface side inward and overlapped with the central portion. At this time, in the diaper main body 2, one of both side portions in the width direction x is folded along the first fold line F1, and the other side portion in the width direction x is folded along the second fold line F2. In the diaper main body 2, the outer portions in the width direction x from the first fold line F1 or the second fold line F2 are both side portions, and the portion between the first fold line F1 and the second fold line F2 is the central portion. Become. Next, as shown in FIG. 7, the disposable diaper 1 has the diaper body 2 folded back between the front boundary line 15 and the rear boundary line 16 with the skin surface side inward in the front-rear direction y (second folding process). . At this time, the diaper main body 2 is folded back in the front-rear direction y along the third fold line F3 between the front boundary line 15 and the rear boundary line 16. The disposable diaper 1 folded in this way is folded as shown in FIGS. 8 and 9. As shown in FIG. 8, the disposable diaper 1 may be folded so that the belt member 11 is folded along with the diaper main body 2 at the third fold line F3 and this state is maintained. Or when the contraction force of the belt member 11 acts strongly in the state where the disposable diaper 1 is folded, as shown in FIG. 9, when the diaper main body 2 is folded back at the third fold line F3, the belt member 11 is moved back and forth. By contracting to y, the belt intermediate region 14 may be displaced so as to be located outward in the width direction x of the diaper body 2, and the disposable diaper 1 may be folded in this way. At this time, the belt intermediate region 14 located outside the width direction x of the diaper main body 2 may be partly reversed by the contraction force of the belt member 11, and as shown in FIG. The region 14 may be located outside the diaper main body 2 in the width direction x without being turned upside down.

  The folded disposable diaper 1 formed as described above includes a diaper main body 2 having both front and rear crotch portions R and a rear portion Q deployed in the front-rear direction y. Is folded with the skin side facing inward, and further folded between the front boundary line 15 and the rear boundary line 16 with the skin side facing inward in the front-rear direction y. The disposable diaper 1 folded in this way is in a state in which both sides in the width direction x of the front abdomen P of the diaper body 2 and both sides in the width direction x of the back portion Q are folded with the skin surface side inward. The outer surface side of both sides in the width direction x of the front abdomen P and the outer surface side of both sides in the width direction x of the back portion Q are folded so as to face each other.

  The disposable diaper 1 folded as shown in FIGS. 8 and 9 is such that the front abdomen P and the back part Q are spread apart from each other, and the folding of both side portions in the width direction x of the diaper body 2 is further expanded. The disposable diaper 1 in a use state as shown in FIG. 1 can be easily deformed. As shown in FIG. 8, even when the disposable diaper 1 is folded in a state where the belt member 11 is folded along the third fold line F3 together with the diaper body 2, the belt member 11 is folded because it is stretchable. While the disposable diaper 1 is expanded as described above, the belt member 11 contracts in the front-rear direction y, and the belt intermediate region 14 moves outward in the width direction x of the diaper main body 2, so that the disposable diaper 1 in use is used. You can get closer to nature.

  The first fold line F1 and the second fold line F2 are preferably formed so as to extend to the front abdomen P, the crotch part R, and the back part Q of the diaper body 2, and from the front edge 9 of the diaper body 2 to the rear. It is preferable that the side edges 10 are formed continuously. The first fold line F1 and the second fold line F2 only have to be formed so as to extend substantially in the front-rear direction y. At this time, the first fold line F1 and the second fold line F2 are ± 10 with respect to the front-rear direction y. It is preferable to extend at an angle within ±, and more preferably within ± 5 °. If the first fold line F1 and the second fold line F2 are thus formed, the disposable diaper 1 can be easily folded into a substantially rectangular shape, and the handleability of the folded disposable diaper 1 is improved.

  The first fold line F1 and the second fold line F2 are preferably formed so as to overlap the absorber 5 at least in the front part P and the back part Q as shown in FIG. Thus, if the 1st fold line F1 and the 2nd fold line F2 are formed, the shape retention property of the folded disposable diaper 1 will improve, and the handleability of the disposable diaper 1 in the folded state will improve. The first fold line F1 and the second fold line F2 may be formed so as to overlap the absorber 5 also in the crotch portion R, or may be provided so as to cross the entire absorber 5 in the front-rear direction y. . Alternatively, in at least a part of the crotch portion R, along the outer edge of the absorbent body 5 in the width direction x, the outer side thereof (for example, from the outer edge of the absorbent body 5 in the width direction x to the outer side in the width direction x). The first fold line F1 and the second fold line F2 may be formed in a portion within 10 mm).

  The first fold line F1 and the second fold line F2 are preferably formed so as to intersect the front boundary line 15 and / or the rear boundary line 16. That is, it is preferable that the diaper main body 2 has its both side portions folded back at a fold line that intersects the front boundary line 15 and / or the rear boundary line 16. In this case, the belt member 11 is folded together with the diaper main body 2 at the first fold line F1 and the second fold line F2, so that the belt member 11 is easily held by the folded diaper main body 2. Therefore, when the disposable diaper 1 is folded, the belt member 11 does not protrude greatly from the diaper main body 2, and the handleability of the folded disposable diaper 1 is improved. Preferably, the first fold line F1 and the second fold line F2 are formed so as to intersect with both the front boundary line 15 and the rear boundary line 16.

  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 preferably has 50% or more of the length of the diaper main body 2 in the width direction x. If the diaper main body 2 is formed in this manner, the disposable diaper 1 is easily folded into a substantially rectangular shape, and the handleability of the folded disposable diaper 1 is improved. Moreover, the shape retention property in the front side edge 9 and / or the rear side edge 10 of the folded disposable diaper 1 improves. 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. Moreover, it is also preferable that the front side edge 9 and / or the rear side edge 10 of the diaper main body 2 is formed from a straight line portion in which the entire portion between the first fold line F1 and the second fold line F2 extends in the width direction x. . Furthermore, 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.

  The diaper main body 2 is provided with an absorber 5 extending from the crotch R to the front abdomen P and / or the back portion Q, and the front boundary line 15 and / or the rear boundary line 16 overlap with the absorber 5. Preferably it is formed. 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 belt member 11 contracts in the front-rear direction y when the disposable diaper 1 is folded, the diaper main body 2 is not easily bent at the front boundary line 15 or the rear boundary line 16, and the disposable diaper 1 can be easily folded. . Moreover, the belt member 11 is easily fixed stably to the diaper main body 2, and the belt member 11 is easily held by the diaper main body 2 in a state where the disposable diaper 1 is folded. Preferably, the absorbent body 5 is provided so as to extend from the crotch R to the front abdominal part P and the back part Q, and both the front boundary line 15 and the rear boundary line 16 overlap with the absorbent body 5.

  The folded disposable diaper 1 is preferably folded only in the first fold line F1 and the second fold line F2 in the width direction x. The length in the width direction x of the folded disposable diaper 1 is preferably 40% or more of the length in the width direction x of the disposable diaper 1 before folding, more preferably 50% or more, and 70% or less. Preferably, 65% or less is more preferable, and 60% or less is more preferable.

  The third fold line F3 only needs to be formed between the front boundary line 15 and the rear boundary line 16 so as to extend substantially in the width direction x, and the third fold line F3 is ± 10 with respect to the width direction x. It is preferable to extend at an angle within ±, and more preferably within ± 5 °. If the third fold line F3 is thus formed, the disposable diaper 1 is easily folded into a substantially rectangular shape, and the handleability of the folded disposable diaper 1 is improved. When the diaper main body 2 is folded back at the third fold line F3, the diaper main body 2 whose both sides in the width direction x are folded back is folded in two in the front-rear direction y.

  The third folding line F3 is 30% to 70% of the front-rear direction y of the diaper body 2 when the front edge 9 is 0% and the rear edge 10 is 100% as a relative position in the front-rear direction y of the diaper body 2. The position is preferably 40% to 60%, and more preferably 45% to 55%. Although not shown in the drawings, the disposable diaper 1 may be folded back in the front-rear direction y after being folded in the front-rear direction y at the third fold line F3, thereby making the disposable diaper 1 more compact. Can be folded into

  The disposable diaper 1 is preferably formed such that 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 main body 2. Specifically, the length in the front-rear direction y from the front end of the front boundary line 15 of the diaper body 2 to the rear end of the rear boundary line 16 is 95% or less of the length of the diaper main body 2 in the front-rear direction y. It is preferable that it is formed so that. The belt member 11 has elasticity in order to enhance the fit around the waist when the disposable diaper 1 is worn, but if the contraction force of the belt member 11 is too strong, the disposable diaper 1 can be folded neatly. It becomes difficult to become difficult. However, 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 of the diaper body 2 is 95% or less of the length of the diaper body 2 in the front-rear direction y. If it is formed, it becomes possible to enhance the waist fit without excessively strengthening the contraction force of the belt member 11, and the disposable diaper 1 can be easily folded. Furthermore, the diaper main body 2 can also be formed so as to cover a wide range from the abdomen to the back including the wearer's crotch. 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 preferably 93% or less of the length of the diaper body 2 in the front-rear direction y, more preferably 90% or less. 87% or less is more preferable. On the other hand, 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 from the point of securing the waist length of the disposable diaper 1 is the front-rear direction of the diaper body 2 It is preferably 50% or more of the length of y, 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.

  The belt member 11 is preferably attached to the diaper body 2 so that the front end of the front boundary line 15 is positioned inward in the front-rear direction y with respect to the front edge 9 of the diaper body 2. Moreover, it is preferable that the belt member 11 is attached to the diaper main body 2 so that the rear end of the rear boundary line 16 is located inward in the front-rear direction y with respect to the rear edge 10 of the diaper main body 2. . Thus, if the belt member 11 is attached to the diaper main body 2, the front part P and the back part Q of the diaper main body 2 can cover a wearer's belly side and back side widely. The front end of the front boundary line 15 may be located 10 mm or more inward (more preferably 25 mm or more, more preferably 50 mm or more inward) in the front-rear direction y of the front edge 9 of the diaper body 2. preferable. The rear end of the rear boundary line 16 is located 10 mm or more inward in the front-rear direction y (more preferably 20 mm or more, more preferably 30 mm or more inward) from the rear edge 10 of the diaper body 2. It is preferable to do. 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 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. If the belt member 11 is attached to the diaper main body 2 in this way, the belt member 11 is peeled off from the diaper main body 2 even when a load is applied to the belt member 11 when the both sides of the diaper main body 2 in the width direction x are folded back. It becomes difficult. 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. When the first fold line F1 and the second fold line F2 are formed so as to intersect with the front boundary line 15 and / or the rear boundary line 16, the front side fixing region 12 and / or the rear side fixing region 13 are arranged in the front-rear direction. The length of y is greater on the outer side in the width direction x of the first fold line F1 and the second fold line F2 than on the inner side in the width direction x of the first fold line F1 and the second fold line F2. It is preferable that it is formed long.

  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 provided in this manner, the belt member 11 can be easily attached to the diaper main body 2 when the disposable diaper 1 is manufactured. Further, when the disposable diaper 1 is folded or when the folded disposable diaper 1 is expanded, both the right belt member 11A and the left belt member 11B are easily moved outward in the width direction x of the diaper body 2, and the disposable diaper It becomes easy to bring 1 close to the shape in use. 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, for example, a substantially rectangular shape, whereby the disposable diaper 1 can be easily manufactured. 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.

  In the disposable diaper 1 shown in the drawings, the front edge 9 and the rear edge 10 of the diaper main body 2 are formed from straight portions extending in the width direction x, and the front boundary line 15 and the rear boundary line 16 of the belt member 11 are Although the disposable diaper of this invention was formed so that it might be located inward of the front-back direction y from the front side edge 9 and the rear side edge 10 of the diaper main body 2, the front side edge and rear side edge of a diaper main body are the width | variety of a diaper Even if the belt member is attached to the diaper main body along the inclined side portions of the front side edge and the rear side edge, the inclined side portions are formed to extend outward in the direction and inward in the front-rear direction. Good.

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 region 15: Front boundary line 16: Rear boundary line F1: First folding line F2: Second folding line F3: Third folding line

Claims (6)

A folded disposable diaper,
The disposable diaper has an elastic belt member joined to the front abdomen and the back part on the outer surface side of the diaper main body having a front part and a back part in the front-rear direction and a crotch part located between them. The diaper body is configured to be provided on one side and the other side in the width direction,
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 diaper main body is folded with the front side part, the crotch part, and the back part being deployed side by side in the front-rear direction with both side parts in the width direction facing the skin side inward, and the front boundary A disposable diaper characterized in that it is folded between the line and the rear boundary line with the skin surface side inward in the front-rear direction.   The disposable diaper according to claim 1, wherein the diaper main body is folded at a fold line that intersects the front boundary line and / or the rear boundary line.   The front side edge and / or 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 in the width 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 40 °. The disposable diaper according to any one of claims 1 to 3, wherein the disposable diaper is 75 ° or less.   The diaper main body is provided with an absorber extending 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 absorber. The disposable diaper as described in any one of Claims 1-4. A method for producing a folded disposable diaper,
The disposable diaper has an elastic belt member joined to the front abdomen and the back part on the outer surface side of the diaper main body having a front part and a back part in the front-rear direction and a crotch part located between them. The diaper body is configured to be provided on one side and the other side in the width direction,
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,
In the state in which the front part, the crotch part, and the back part of the diaper body are deployed in the front-rear direction, and the belt intermediate region of the belt member is overlapped on the outer surface side of the diaper body, A first folding step of folding the widthwise sides of the diaper body with the skin side facing inward,
After the first folding step, the diaper main body includes a second folding step of folding the diaper body between the front boundary line and the rear boundary line with the skin surface side inward in the front-rear direction. To make folded disposable diapers.

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