JP5577906B2 - Absorbent article sheet manufacturing method, absorbent article sheet and absorbent article - Google Patents

Description

  The present invention relates to a method for manufacturing a sheet for absorbent articles, a sheet for absorbent articles, and an absorbent article. More specifically, a plurality of ridges and grooves extending from one end to the other end are formed on the surface. Absorbent that can produce a sheet for absorbent articles with good touch and absorbency, and can produce a sheet for absorbent articles with a production facility that is easier to maintain and manage than conventional production equipment The present invention relates to an article sheet manufacturing method, an absorbent article sheet manufactured by the manufacturing method, and an absorbent article.

  Conventionally, absorbent articles absorb disposable diapers that absorb excreted fluid such as urine (for example, tape-type disposable diapers, pants-type disposable diapers, urine pads, etc.), sanitary napkins that absorb menstrual blood, and vaginal discharge. It is used as a sheet of cage. As these absorbent articles, an absorbent body, a top sheet that is arranged to cover the surface of the absorbent body, at least partially made of a liquid-permeable material, and a back surface of the absorbent body are arranged. And a back sheet made of a liquid-impermeable material.

  According to such an absorbent article, the excrement of the wearer passes through the liquid-permeable portion of the top sheet and is absorbed by the absorbent body, and by the back sheet made of a liquid-impermeable material. Leakage to the outside is prevented and the excrement is retained.

  And since a top sheet touches a wearer's skin directly, it is requested | required that the touch should be favorable. In addition, if excrement remains on the top sheet for a long time, that is, if the absorbability of the top sheet is poor, it causes stuffiness and the like. Therefore, the top sheet is required to have good absorbability.

  Therefore, a top sheet (absorbent article sheet) formed so that the convex portions are arranged in a substantially staggered pattern on one surface side is known (for example, see Patent Document 1). .

JP 2009-50538 A

  However, since the sheet for absorbent articles described in Patent Document 1 is required to form convex portions having a complicated pattern (substantially zigzag) in the manufacturing method thereof, the convex portions are formed. The structure of the convex roll is also complicated. For this reason, there is a problem that maintenance and management are troublesome (specifically, dust and the like are easily collected between the convex portions of the convex roll, and it is very troublesome to remove the accumulated dust and the like).

  The present invention has been made in view of such problems of the prior art, and a plurality of ridges and grooves are formed on the surface from one end to the other end to provide a good touch and absorbability. The manufacturing method of the sheet for absorbent articles which can manufacture the sheet for absorbent articles and can manufacture the sheet for absorbent articles with a manufacturing facility that is easier to maintain and manage than conventional manufacturing equipment, An absorbent article sheet and an absorbent article produced by the production method are provided.

  As a result of intensive studies to solve the above problems, the present inventor is sufficiently good if the sheet has a plurality of ridges and grooves formed from one end to the other end on at least one of the front and back surfaces. It has been found that it has a good touch and absorbency, and has completed the present invention. According to this invention, the manufacturing method of the sheet | seat for absorbent articles shown below, the sheet | seat for absorbent articles, and an absorbent article are provided.

[1] A top sheet material made of a liquid-permeable material, a first uneven roll in which a plurality of annular recesses and a plurality of annular projections are alternately formed on the surface, a plurality of annular recesses on the surface, and By sandwiching between the second concavo-convex roll in which a plurality of annular convex portions are alternately formed, the top sheet material is formed on both the front surface side and the back surface side with a plurality of concave grooves along the flow direction. A plurality of protrusions of the surface sheet material formed into a corrugated shape in a state of maintaining a shape of the surface sheet material formed into a corrugated shape, and a molding step for forming the corrugated shape in which the plurality of protrusions are alternately formed. A bonding step of obtaining a long adhesive body by adhering a top portion of the strip formed on the back surface side and a surface of a back sheet material made of a liquid permeable material; and Absorption to obtain multiple sheets for absorbent articles by cutting at length A method of manufacturing an absorbent article for sheet and a sheet producing step for articles, as each of the topsheet material and the backsheet material, used after subjected to a hydrophilic treatment to a nonwoven fabric made of thermoplastic resin The manufacturing method of the sheet | seat for absorbent articles .

[2] In the bonding step, a third concavo-convex roll having a plurality of annular recesses and a plurality of annular projections alternately formed on the surface thereof, and a plain roll having no recesses and projections formed on the surface thereof Between the top sheet and the back sheet material by sandwiching a laminate obtained by superposing the top sheet material and the back sheet material formed into a corrugated shape, and pressing the plain roll while heating The manufacturing method of the sheet | seat for absorbent articles as described in said [1] which adhere | attaches the surface and obtains the said elongate adhesive body.

[3] As said 1st uneven | corrugated roll and said 2nd uneven | corrugated roll, the cross-sectional shape of the top part of the said cyclic | annular convex part is circular arc shape, or the bottom face of the cyclic | annular said recessed part is concave shape, or these The manufacturing method of the sheet | seat for absorbent articles as described in said [1] or [2] using what is both.

[4] In any one of the above [1] to [3], the first concavo-convex roll and the second concavo-convex roll each having the same width of the annular convex portion and the annular concave portion are used. The manufacturing method of the sheet | seat for absorbent articles of description.

[5] An absorbent article sheet manufactured by the method for manufacturing an absorbent article sheet according to any one of [1] to [4].

[6] An absorbent body, a top sheet that is at least partially made of a liquid-permeable material and arranged to cover the surface of the absorbent body, and a liquid-impermeable material that covers the back surface of the absorbent body And at least a part of the top sheet is manufactured by the method for manufacturing an absorbent article sheet according to any one of [1] to [4]. The absorbent sheet is an article sheet, and the absorbent article sheet is disposed such that a surface in which the plurality of concave grooves and the plurality of ridges are alternately formed contacts the wearer when worn. Goods.

  The manufacturing method of the sheet | seat for absorbent articles of this invention is the 1st uneven | corrugated roll by which the some cyclic | annular recessed part and the some cyclic | annular convex part were alternately formed in the surface, and the some cyclic | annular recessed part and plural in the surface By sandwiching between the second convex and concave rolls in which the annular convex portions are alternately formed, that is, by using a concave and convex roll having a simple structure as compared with the concave and convex roll as described in Patent Document 1. In order to form a surface sheet material into a waveform in which a plurality of grooves and a plurality of ridges are alternately formed along the flow direction on both the front surface side and the back surface side, conventional manufacturing equipment (particularly unevenness) The sheet for absorbent articles can be produced by a production facility (particularly a concave-convex roll) that is easier to maintain and manage than the roll. That is, when a concave / convex roll having a complicated structure is used as in a conventional manufacturing facility (for example, see Patent Document 1) (particularly, a concave / convex roll having a concave portion formed so as to be orthogonal to the flow direction of the surface sheet material). In addition, dust and the like are easily accumulated in the recesses formed on the uneven roll, particularly the recesses formed so as to be orthogonal to the flow direction of the surface sheet material, and it takes time and effort to remove the dust and the like. On the other hand, according to the manufacturing method of the present invention, a concavo-convex roll having a simple structure as compared with such a conventional manufacturing facility (a concavo-convex portion having an annular convex portion and a concave portion formed along the flow direction of the surface sheet material). Since a roll is used, dust or the like hardly accumulates on the convex portion of the uneven roll, and even if dust or the like accumulates, it can be easily removed. Moreover, the some protruding item | line and the ditch | groove are formed in the sheet | seat for absorbent articles manufactured by the manufacturing method of this invention. Therefore, an absorbent article sheet having a good touch and absorbency can be obtained. And the absorbent article which used such a sheet | seat for absorbent articles as at least one part of a top sheet has favorable touch and absorbency.

It is explanatory drawing which shows typically the sheet | seat manufacturing apparatus for absorbent articles used in one Embodiment of the manufacturing method of the sheet | seat for absorbent articles of this invention. It is sectional drawing which shows typically the A-A 'cross section shown in FIG. It is a figure which shows a part of end surface at the time of cut | disconnecting a corrugated surface sheet material by A-A 'shown in FIG. It is sectional drawing which shows the B-B 'cross section shown in FIG. 1 typically. It is a top view which shows typically the sheet | seat for absorbent articles manufactured in one Embodiment of the manufacturing method of the sheet | seat for absorbent articles of this invention. It is sectional drawing which shows typically the C-C 'cross section shown in FIG. It is a figure corresponding to FIG. 3 which shows the corrugated surface sheet material obtained in other embodiment of the manufacturing method of the sheet | seat for absorbent articles of this invention. It is a figure corresponding to FIG. 3 which shows the corrugated surface sheet material obtained in other embodiment of the manufacturing method of the sheet | seat for absorbent articles of this invention. It is a perspective view showing typically one embodiment of an absorptive article of the present invention.

  Hereinafter, although the form for implementing this invention is demonstrated, this invention is not limited to the following embodiment. That is, it is understood that modifications and improvements as appropriate to the following embodiments are also within the scope of the present invention based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. Should be.

[1] Method for producing sheet for absorbent article:
As one embodiment of the method for producing a sheet for absorbent articles of the present invention, a surface sheet material made of a liquid-permeable material has a plurality of annular recesses and a plurality of annular projections alternately formed on the surface. By sandwiching between the first concavo-convex roll and the second concavo-convex roll in which a plurality of annular recesses and a plurality of annular projections are alternately formed on the surface thereof, the surface sheet material is provided on the surface side and the back surface thereof. On both sides, in the state of maintaining the shape of the surface sheet material formed into a corrugated shape, the forming step for forming the corrugated shape in which a plurality of concave grooves and a plurality of ridges are alternately formed along the flow direction, A bonding step of obtaining a long adhesive body by bonding a top portion of a plurality of protrusions of the surface sheet material formed on the back surface side and a surface of the back sheet material made of a liquid permeable material, and obtained Multiple absorption by cutting a long adhesive body at a predetermined length Absorbent article sheet producing step of obtaining an article sheet, a method comprising a.

  According to such a method for manufacturing a sheet for absorbent articles, a first unevenness in which a plurality of annular recesses and a plurality of annular projections are alternately formed on the surface of a surface sheet material made of a liquid-permeable material. By being sandwiched between a roll and a second concavo-convex roll in which a plurality of annular concave portions and a plurality of annular convex portions are alternately formed on the surface thereof, that is, the concavo-convex roll as described in Patent Document 1 By using a concavo-convex roll having a simple structure as compared with the surface sheet material, a plurality of concave grooves and a plurality of ridges were alternately formed along the flow direction on both the front surface side and the back surface side. Since it only has to be formed into a corrugated shape, the absorbent article sheet can be produced by a production facility (particularly a concave-convex roll) that is easier to maintain and manage than conventional production equipment (particularly a concave-convex roll). That is, when a concavo-convex roll having a complicated structure (for example, the concavo-convex roll described in Patent Document 1) is used as in a conventional manufacturing facility (particularly, it has a recess formed so as to be orthogonal to the flow direction of the surface sheet material). When a concave-convex roll is used), dust or the like tends to accumulate in a concave portion orthogonal to the flow direction of the surface sheet material, and it takes time and effort to remove the dust. On the other hand, according to the manufacturing method of the present invention, since the uneven roll formed with the annular protrusions and recesses (that is, the uneven roll not formed with the recesses orthogonal to the flow direction of the surface sheet material) is used, It is difficult for dust or the like to collect in the concave portion of the roll, and even if dust or the like is collected, it can be easily removed. Moreover, since the several protrusion and the ditch | groove are formed in the sheet | seat for absorbent articles manufactured by the manufacturing method of this invention, this sheet | seat for absorbent articles has favorable touch and absorbency. And the absorbent article which used such a sheet | seat for absorbent articles as at least one part of a top sheet has favorable touch and absorbency.

  FIG. 1 is an explanatory view schematically showing an absorbent article sheet manufacturing apparatus 100 used in an embodiment of a method for manufacturing an absorbent article sheet of the present invention. An absorbent article sheet manufacturing apparatus 100 shown in FIG. 1 sandwiches a first supply roll 23 that supplies a surface sheet material 11 made of a liquid-permeable material, and the surface sheet material 11 that is supplied from the first supply roll 23. The surface sheet material 11 is formed into a waveform in which a plurality of concave grooves 14a, 14b and a plurality of convex strips 13a, 13b are alternately formed along the flow direction on both the front surface side and the back surface side (corrugated waveform). A forming roll 25 having a first concavo-convex roll 25a and a second concavo-convex roll 25b (forming the top sheet material 15), a second supply roll 27 supplying a back sheet material 17 made of a liquid-permeable material, and a plurality of surfaces on the surface. The annular recess 43a and the plurality of annular protrusions 43b are alternately formed, and the third uneven roll 29a and the plain roll 29b on which the recesses and protrusions are not formed, A pressing roll 29 that forms the long adhesive body 19, an adhesive coating portion 31 disposed between the pressing roll 29 and the second supply roll 27, and the long adhesive body 19 with a predetermined length in the longitudinal direction. The cutting part 33 cut | disconnected by this and makes it the sheet | seat 21 for absorbent articles, and the conveyance roll 35 which sends out the sheet | seat 21 for absorbent articles are provided. The first concavo-convex roll 25a of the forming roll 25 has a plurality of annular concave portions 37a and a plurality of annular convex portions 37b formed alternately on the surface thereof in the roll axis direction. A plurality of annular recesses 39a and a plurality of annular projections 39b are formed alternately on the surface in the roll axis direction. And the 1st uneven | corrugated roll 25a and the 2nd uneven | corrugated roll 25b are the recessed part 37a of the 1st uneven | corrugated roll 25a, and the convex part 39b of the 2nd uneven | corrugated roll 25b can pinch | interpose the surface sheet material 11 The projections 37b of the first concavo-convex roll 25a and the recesses 39a of the second concavo-convex roll 25b are arranged so as to fit via the surface sheet material 11 (see FIG. 2). The annular convex portion 37b of the first uneven roll 25a has a flat surface at the top, and the annular concave portion 39a of the second uneven roll 25b has a flat surface at the bottom.

  Between the first supply roll 23 and the forming roll 25, a dancer roll 43 for detecting the tension of the sheet is disposed. The dancer roll 43 is composed of two intermediate rolls 43b and 43b and a displacement roll 43a provided between the intermediate rolls 43b and 43b so as to be movable up and down. When the tension acting on the surface sheet material 11 changes, According to the change, the displacement roll 43a is displaced up and down. For this reason, the tension acting on the top sheet material 11 can be kept constant by adjusting the feed amount of the top sheet material 11 so that the vertical position of the displacement roll 43a is kept constant.

  Also, a dancer roll 44 (displacement roll 44a, intermediate rolls 44b, 44b) is arranged between the pressing roll 29 and the second supply roll 27, and the tension of the back sheet material 17 is detected by the dancer roll 44, Based on the detected signal, the feed amount of the back sheet material 17 is controlled so as to keep the tension acting on the back sheet material 17 constant.

  A touch roll 53 is disposed so as to abut against the first supply roll 23, and a touch roll 55 is disposed so as to abut against the second supply roll 27. The touch rolls 53 and 55 are separately provided with a driving roll (not shown), and the touch rolls 53 and 55 are rotated via a belt or the like to rotate the first supply roll 23 or the second supply roll 27. A sheet can be sent out from each supply roll. Reference numeral 57 denotes a guide roll for guiding the feeding direction of the top sheet material 11, and reference numeral 59 denotes a guide roll for guiding the feeding direction of the back sheet material 17.

[1-1] Molding process:
The forming step includes a surface sheet material made of a liquid-permeable material, a first uneven roll in which a plurality of annular recesses and a plurality of annular projections are alternately formed on the surface, and a plurality of annular recesses on the surface. And a plurality of concave grooves along the flow direction on both the front surface side and the back surface side by sandwiching between the second uneven roll formed alternately with the plurality of annular convex portions. This is a step of forming a waveform in which a plurality of ridges are alternately formed. In this step, a concave-convex roll having a simpler structure than a conventional concave-convex roll is used, so that the maintenance can be easily performed, and the surface sheet material is formed into a corrugated shape by this step, so that the manufactured absorbent article A plurality of ridges and grooves extending from one end to the other end are formed on at least the surface of the sheet for use. Therefore, the sheet | seat for absorbent articles which has favorable touch and absorbency can be manufactured.

  FIG. 2 is a cross-sectional view schematically showing the A-A ′ cross section shown in FIG. 1. As shown in FIG. 2, in this step, a first uneven roll 25 a in which a plurality of annular recesses 37 a and a plurality of annular protrusions 37 b are alternately formed in the roll axis direction on the surface, and the surface Between the first concavo-convex roll 25a and the second concavo-convex roll 25b, using the second concavo-convex roll 25b in which a plurality of annular concave portions 39a and a plurality of annular convex portions 39b are alternately arranged in the roll axis direction. By sandwiching the surface sheet material 11, the surface sheet material 11 supplied from the first supply roll 23 is formed into a corrugated surface sheet material 15. Here, the “annular convex portion” is a raised portion formed so as to go around the outer circumference of the concave and convex roll (each of the first concave and convex roll and the second concave and convex roll). And a groove formed so as to go around the outer periphery of the concavo-convex roll (the first concavo-convex roll and the second concavo-convex roll). A plurality of such annular convex portions and annular concave portions are formed on the first concave and convex rolls, and these are alternately formed in the roll axis direction.

Specific examples of the surface sheet material include a woven fabric, a nonwoven fabric, and a porous film. Among these, polypropylene, polyethylene, polyester, nylon Ru used after subjected to a hydrophilic treatment to a nonwoven fabric consisting of (R) thermoplastic resin such as. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The thickness of the surface sheet material is not particularly limited, but can be 0.1 to 2.0 mm.

  The width | variety of a surface sheet material can be suitably set according to the kind of absorbent article. And it is preferable that the width | variety of this surface sheet material is wider than the width | variety of the sheet | seat for absorbent articles produced. That is, since a plurality of ridges and grooves are formed on the surface sheet material, it is preferable that the surface sheet material is wide by an amount corresponding to the ridges and grooves (as much as necessary for forming the ridges). In addition, after supplying a surface sheet material from the 1st supply roll 23, after aligning with a guide (not shown) etc., that is, after preparing a part without dubbing, the 1st uneven | corrugated roll 25a. It is preferable to be introduced between the second uneven roll 25b.

  “Waveforms in which a plurality of grooves and ridges are alternately formed along the flow direction” means that the cross-section cut perpendicularly to the flow direction has a shape having a polygonal line and a curved waviness. Specifically, examples of the shape having a polygonal wave shape include an arc shape and a mountain shape, and examples of the shape having a curved wave shape include a wave shape. it can. Among these, the arc shape and the wave shape are preferable from the viewpoint that the touch is further improved. Here, FIG. 3 is an example showing the “arc-shaped” surface sheet material 15. 7 is an example showing a “mountain shape” surface sheet material 115, and FIG. 8 is an example showing a “wave shape” surface sheet material 215. FIG. 3 is a view showing a part of the end face when the corrugated surface sheet material is cut by A-A ′ shown in FIG. 1. FIG. 7 is a view corresponding to FIG. 3 showing a corrugated surface sheet material obtained in another embodiment of the method for producing an absorbent article sheet of the present invention, and FIG. 8 is for the absorbent article of the present invention. It is a figure corresponding to FIG. 3 which shows the corrugated surface sheet material obtained in other embodiment of the manufacturing method of a sheet | seat.

  The “arc-shaped” top sheet material 15 shown in FIG. 3 has a concave groove 14 a having a mountain-shaped cross section on the front surface side and a concave groove 14 b having a semicircular cross section on the back surface side. The concave groove 14a is a space surrounded by a plane passing through the apex portions h1 and h2 of the adjacent convex strips 13a on the front surface side and the surface of the surface sheet material 15, and the concave groove 14b is an adjacent convex strip 13b on the rear surface side. Is a space surrounded by a plane passing through the apex portions r1 and r2 and the back surface of the top sheet material 15. The “mountain shape” surface sheet material 115 shown in FIG. 7 has a trapezoidal concave groove 114 a on the front side and a trapezoidal concave groove 114 b on the back side. A “wave-like” surface sheet material 215 shown in FIG. 8 is formed with a groove 214a having a tongue-shaped cross section on the front surface side and a groove 214b having a tongue-shaped cross section on the back surface side.

  In this step, as long as the corrugated surface sheet material can be formed, the shape of the concave and convex portions of the first concave and convex rolls and the second concave and convex rolls is not particularly limited, but as the first concave and convex rolls and the second concave and convex rolls, The cross-sectional shape of the top of the annular convex portion (the shape in the cross section cut through the central axis of the concave-convex roll) is an arc shape, or the bottom surface of the annular concave portion is concave (the concave-convex roll on the bottom surface of the annular concave portion) It is preferable to use one having a circular arc shape in a cross section cut so as to pass through the central axis or both of them. In other words, the first concavo-convex roll is such that the cross-sectional shape of the top of the annular convex portion is an arc shape, the bottom surface of the annular concave portion is a concave surface, or both (that is, the annular convex shape) It is preferable that the cross-sectional shape of the top of the part is an arc and the bottom of the annular recess is concave. And it is preferable that a 2nd uneven | corrugated roll is the said shape similarly to a 1st uneven | corrugated roll. When such a concavo-convex roll (first concavo-convex roll and second concavo-convex roll) is used, the shape of the convex portion 13 of the surface sheet material to be obtained becomes an arc shape or a wave shape. The surface sheet material can be formed.

  Further, in this step, as the first concavo-convex roll and the second concavo-convex roll, respectively, the width of the annular convex portion (indicated by reference sign “K” in FIG. 2) and the width of the annular concave portion (reference sign “ It is preferable to use those having a ratio of 1: 2 to 4: 1 and more preferably those having the same width. That is, as long as the corrugated surface sheet material can be formed, the shapes of the concave and convex portions of the first concave and convex rolls and the second concave and convex roll are not particularly limited, but the annular convex portions formed on the first concave and convex roll are not limited. The width and the width of the annular recess preferably satisfy the above conditions, and the width of the annular protrusion formed on the second uneven roll and the width of the annular recess preferably satisfy the above conditions. In other words, when the concavo-convex roll has a flat surface on the top of the annular convex portion (see FIG. 2), the width of the flat surface (reference numeral “K” in FIG. 2) and the flat surface It is preferable that the distance between the surfaces (symbol “M” in FIG. 2) satisfies the above condition.

[1-2] Adhesion process:
The adhering step maintains the shape of the corrugated surface sheet material (the corrugated surface sheet material), and the top portion and liquid of the corrugated surface sheet material formed on the back side of the plurality of ridges In this process, a long adhesive body is obtained by bonding the surface of a back sheet material made of a permeable material. In this step, the shape of the corrugated surface sheet material is maintained even in the obtained long adhesive body in order to adhere the surface sheet material and the surface of the back surface sheet material while maintaining the shape of the corrugated surface sheet material. Will be. That is, since a plurality of ridges and grooves are formed on the surface side of the long adhesive body, it is possible to produce an absorbent article sheet having good touch and good absorbability.

Specific examples of the back sheet material include woven fabric, non-woven fabric, and porous film. Among these, polypropylene, polyethylene, polyester, nylon Ru used after subjected to a hydrophilic treatment to a nonwoven fabric consisting of (R) thermoplastic resin such as. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The thickness of the back sheet material is not particularly limited. Moreover, the width | variety of a back surface sheet material can be suitably set according to the kind of absorbent article.

  Examples of means for bonding the top sheet material 15 and the back sheet material 17 include a hot melt adhesive, a heat seal, and an ultrasonic wave. Among these, a hot melt adhesive is preferable because it can be applied continuously in the flow direction of the sheet. As described above, the sheet manufacturing apparatus 100 for absorbent articles shown in FIG. 1 includes the adhesive coating portion 31, and the adhesive coating portion 31 allows hot melt bonding to a predetermined portion of the back sheet material 17. The agent 41 is applied. Here, the “predetermined portion” is a portion that is overlapped with the top of what is formed on the back side of the plurality of protrusions of the top sheet material. The hot melt adhesive 41 may be applied to at least a part of the portion overlapped with the top, for example, may be applied to the entire area in the flow direction of the back sheet material 17 (in a solid line shape) You may apply intermittently (in broken line shape) to a part of direction. In FIG. 1, the hot melt adhesive 41 is applied only to the back sheet material 17, but the hot melt adhesive is applied only to the top sheet material 15 or both the top sheet material 15 and the back sheet material 17. 41 may be applied in the form of a solid line or a broken line. Moreover, it is preferable that the width | variety of the hot-melt-adhesive 41 is the same as the width | variety of the top part of the said protruding item | line.

  Moreover, it is preferable that a laminated body adhere | attaches a surface sheet material and a back surface sheet material also in a both-sides edge part besides adhere | attaching the top part of the said protruding item | line and the surface of a back surface sheet material. And the means to adhere | attach a surface sheet material and a back surface sheet material can mention a hot-melt-adhesive agent, a heat seal, an ultrasonic wave etc., for example. FIG. 4 shows an example in which the hot-melt adhesive 42 is applied at both side edges of the laminate, and the top sheet material 15 and the back sheet material 17 are bonded.

  As described above, the absorbent article sheet manufacturing apparatus 100 shown in FIG. 1 includes the pressing roll 29 having the third uneven roll 29a and the plain roll 29b. And the 3rd uneven | corrugated roll 29a is the same uneven | corrugated roll as the 1st uneven | corrugated roll 25a mentioned above, and the plain roll 29b is a cylindrical roll in which the recessed part and convex part are not formed in the surface. As described above, when the third uneven roll 29a and the plain roll 29b are prepared and the laminated body is sandwiched between them, when obtaining a long adhesive body, the top sheet material and the back sheet material are excellent. This is preferable because it can be adhered. When the laminate is sandwiched between the third concavo-convex roll 29a and the plain roll 29b, the shape of the surface sheet material is not destroyed by the third concavo-convex roll and the plain roll 29b (specifically, So that the ridges are not crushed). In the absorbent article sheet manufacturing apparatus 100, the same concave-convex roll as the first concave-convex roll 25a is used as the third concave-convex roll 29a, but the shape of the surface sheet material is not collapsed when the laminate is sandwiched, The structure of the third uneven roll 29a is not particularly limited as long as the top sheet material and the back sheet material can be bonded.

  FIG. 4 shows that in the bonding step, a laminated body obtained by superposing the corrugated top sheet material 15 and the back sheet material 17 is sandwiched between the third uneven roll 29a and the plain roll 29b, and the plain roll 29b is heated. By pressing while pressing, the top t of the ridge (see FIG. 3) and the front surface 17a (see FIG. 1) of the back sheet material 17 are bonded to obtain a long adhesive body 19 (see FIG. 1). ing. 4 is a cross-sectional view schematically showing a B-B ′ cross section shown in FIG. 1.

[1-3] Absorbent article sheet manufacturing process:
The absorbent article sheet manufacturing step is a step of manufacturing the plurality of absorbent article sheets 21 by cutting the manufactured long adhesive body 19 at a predetermined length in the longitudinal direction.

  The absorbent article sheet manufacturing apparatus 100 shown in FIG. 1 includes a cutting portion 33 that cuts the long adhesive body 19 at a predetermined length in the longitudinal direction to form the absorbent article sheet 21, and this cutting is performed. Specifically, the part 33 is a cutter or the like. The “predetermined length” can be appropriately set according to the type of the absorbent article.

  The absorbent article sheet 21 as shown in FIGS. 5 and 6 can be produced by the method for producing an absorbent article sheet of the present invention. The absorbent article sheet 21 shown in FIGS. 5 and 6 has a corrugated shape made of a liquid-permeable material in which a plurality of grooves 24 and a plurality of ridges 23 are alternately formed from one end 21a to the other end 21b. A top sheet 49 and a back sheet 47 made of a liquid-permeable material superimposed on the top sheet 49 are provided, and the top sheet 49 and the back sheet 47 are bonded and fixed to each other by an adhesive portion 51. Since such a sheet | seat 21 for absorbent articles has the several convex 23 on the surface side, when it wears, the surface of the contact area of a wearer and the sheet | seat 21 for absorbent articles is flat. It is smaller than the one and the touch is good. Moreover, since excretory fluids, such as urine, are easy to spread | diffuse along the several ditch | groove 24, if this absorbent article sheet is used, the absorbent article which has the outstanding absorptivity can be obtained. FIG. 5 is a plan view schematically showing a sheet for absorbent articles manufactured in one embodiment of the method for manufacturing a sheet for absorbent articles of the present invention, and FIG. 6 is a CC view shown in FIG. 'A cross-sectional view schematically showing a cross section.

  The number of the plurality of ridges formed on the surface sheet (the surface of the absorbent article sheet) can be appropriately set according to the type of the absorbent article and the width of the ridges, and is not particularly limited as long as it is a plurality. Absent. Moreover, it is preferable that the space | interval (pitch) (width | variety of a ditch | groove) of a protruding item | line is 3-7 mm.

  Moreover, although the height H (refer FIG. 6) of the protruding item | line formed in a surface sheet can be suitably set according to the number of the said protruding item | line etc., specifically, it may be 2-5 mm. preferable. Further, the height H of the ridge is preferably 50 to 150% with respect to the width of the ridge.

  The produced absorbent article sheet 21 is sent out by the transport roll 35. The structure of the transport roll 35 is not particularly limited as long as it does not crush the ridges 23 of the absorbent article sheet 21. The sheet manufacturing apparatus 100 for absorbent articles shown in FIG. 1 is an example in which a roll having the same structure as the pressing roll 29 is used.

[2] Absorbent article sheet:
The sheet | seat for absorbent articles of this invention is a sheet | seat manufactured with the manufacturing method of the sheet | seat for absorbent articles of this invention mentioned above. Such a sheet for absorbent articles has a good touch because a plurality of ridges are formed on one surface side. And since several ditch | groove is formed, excretion fluids, such as urine, spread | diffuse easily through this ditch | groove. Therefore, when the absorbent article sheet of the present invention is used as a top sheet of an urine pad or the like (absorbent article), a urine pad (absorbent article) having good absorbability can be obtained.

  The absorbent article sheet of the present invention can be used as a sheet constituting the absorbent article as described above. Specifically, the urine pad top sheet and the disposable diaper top sheet (in particular, the top sheet). Can be used as a center sheet disposed at the center of the sheet.

[3] Absorbent articles:
The absorbent article of the present invention is composed of an absorbent body, a top sheet at least partly made of a liquid-permeable material, and arranged to cover the surface of the absorbent body, and a liquid-impermeable material. A back sheet disposed so as to cover the back surface, and at least a part of the top sheet is an absorbent article sheet manufactured by the above-described method for manufacturing an absorbent article sheet. When the article sheet is worn, the surface on which the plurality of concave grooves and the plurality of ridges are alternately formed contacts with the wearer. Therefore, the touch is good. And excretion fluids, such as urine, are easy to diffuse through a plurality of ditch | grooves, and absorptivity is good.

  Specific examples of the absorbent article of the present invention include a urine pad and a disposable diaper.

  The urine pad is a liquid that is disposed so as to cover the absorber, the top sheet that is disposed so as to cover the surface of the absorber, and at least partly made of a liquid-permeable material, and the back surface of the absorber. And a backsheet made of an impermeable material, and when the absorbent article of the present invention is applied as a urine pad, the absorbent article manufactured by the method for manufacturing an absorbent article sheet of the present invention The sheet for use is used as at least a part of the top sheet.

  Moreover, as a disposable diaper, there are a tape type and a pants type, and the absorbent article of the present invention can be applied to any type. When the absorbent article of the present invention is applied to a disposable diaper, the entire top sheet may be constituted by the absorbent article sheet produced by the method for producing an absorbent article sheet of the present invention. A center sheet disposed in the center of the center sheet and a side sheet of a breathable and water-repellent material disposed on the outer peripheral portion (side flap portion) of the center sheet and exhibiting resistance to liquid permeation. In this case, the center sheet may be constituted by the absorbent article sheet produced by the method for producing an absorbent article sheet of the present invention.

  FIG. 9 is a perspective view schematically showing one embodiment of the absorbent article of the present invention. A tape-type disposable diaper 200 shown in FIG. 9 is composed of an absorbent body 22 and a liquid-permeable material, and the absorbent body. A top sheet 18 disposed so as to cover the surface of 22, and a back sheet 20 made of a liquid-impermeable material and disposed so as to cover the back surface of the absorber 22. It consists of the sheet | seat for absorbent articles manufactured by the manufacturing method of the sheet | seat for absorbent articles of this invention. Since such a tape-type disposable diaper is arranged so that a surface on which a plurality of ridges are alternately formed comes into contact with the wearer, the touch when worn is good. And excretion fluids, such as urine, are easy to diffuse through a plurality of ditch | grooves, and absorptivity is good. FIG. 9 shows the top sheet 18 with a part cut away.

  The tape-type disposable diaper 200 is further arranged so as to extend from the left and right side edges 6a, 6b of the back body 6, and includes a fastening tape 26 for fixing the front body 2 and the back body 6, and a repellent A three-dimensional gather 36 made of an aqueous sheet and disposed on both sides of the absorbent body 22 and various elastic materials (not shown) disposed for the purpose of preventing urine leakage by being positioned around the legs and the waist when worn. I have.

  The "front body" is the portion that covers the wearer's ventral side (front of the body) when worn on the wearer, and the "rear body" is the back side of the wearer when worn on the wearer. It shall mean the part covering (back of the body).

  An absorber is a member for absorbing and holding a wearer's urine etc., and is comprised with an absorptive material. And as an absorptive material which comprises an absorber, a fluff pulp, a superabsorbent polymer (Super Absorbent Polymer), a hydrophilic sheet, etc. can be mentioned, for example. Examples of the liquid-impermeable material constituting the back sheet include a liquid-impermeable film made of a resin such as polyethylene.

  The top sheet is made of a liquid-permeable material and is disposed so as to cover the surface of the absorbent body. In the absorbent article of the present invention, at least a part of the top sheet is a book. It consists of the sheet | seat for absorbent articles manufactured by the manufacturing method of the sheet | seat for absorbent articles of invention. As described above, the top sheet may be composed of the absorbent article sheet, and the center sheet of the top sheet may be composed of the absorbent article sheet.

  A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in the side far from a wearer's skin at the time of wear of a diaper) may be coat | covered. Since the backsheet needs to prevent the wearer's urine from leaking outside the diaper, the backsheet is made of a liquid-impermeable material.

  The three-dimensional gather is made of a water-repellent sheet, and is arranged in at least a pair arranged on both sides of the absorbent body. As this three-dimensional gather, those used in conventional disposable diapers and other absorbent articles can be appropriately employed. A tape-type disposable diaper 200 shown in FIG. 9 forms a three-dimensional gather 36 by separately attaching a water-repellent sheet for a three-dimensional gather to the back sheet 20. As described above, the three-dimensional gather may be separately attached to the back sheet 20, but may be formed by a part of the sheet material constituting the diaper.

  The fastening member of the fastening tape may be an adhesive fastener that is fixed by an adhesive, but a mechanical fastener (planar fastener) that is fixed by mechanical coupling is preferably used. The number of fastening tapes is not particularly limited, and an appropriate number of fastening tapes may be attached according to the dimensions of the wearer's body shape (specifically, around the waist, around the legs, etc.). In general, a pair of disposable diapers for infants (one each on the left and right) is attached, and a pair of disposable diapers for adults (two on the left and two on the left) are attached.

  As various elastic materials, elastic materials around the legs and elastic materials around the waist, and elastic materials that have been used in conventional disposable diapers and other absorbent articles can be suitably used.

  The absorbent article of the present invention may further include a second sheet disposed between the top sheet and the absorbent body in addition to the above members.

  About the manufacturing method of the absorbent article of this invention, the case where the tape-type disposable diaper 200 shown in FIG. 9 is manufactured is demonstrated to an example.

  First, an absorbent article sheet is produced by the method for producing an absorbent article sheet of the present invention. Next, the manufactured absorbent article sheet is disposed so as to cover one surface side of the absorbent body 22, and this absorbent article sheet is used as the top sheet 20. At this time, it arrange | positions so that the surface (surface in which the several protruding item | line was formed) of the sheet | seat for absorbent articles may be located in the other side. That is, the absorbent article sheet is disposed so that the surface of the absorbent article sheet (top sheet 20) on which the plurality of ridges are formed contacts the wearer when worn. In this way, a laminate composed of the top sheet 20 and the absorber 22 is obtained.

  Then, on the back sheet material made of a liquid-impermeable material, the obtained laminate is placed with the absorbent body facing the back sheet material, and the adhesion that has been applied to the surface of the back sheet material in advance. The absorbent article sheet (top sheet 20) and the back sheet material are bonded to each other at the periphery of the absorbent body 22 by the agent. At this time, various stretchable materials are disposed at predetermined positions of the backsheet material. Thereafter, a three-dimensional gather 36 and a fastening tape 26 which are formed in advance at a predetermined position of the back sheet material are attached. Next, the tape-type disposable diaper 200 shown in FIG. 9 can be manufactured by cutting the back sheet material.

  The manufacturing method of the sheet | seat for absorbent articles of this invention can manufacture the sheet | seat which comprises an absorbent article, and is specifically suitable as a method for manufacturing a top sheet (especially center sheet). Moreover, the sheet | seat for absorbent articles of this invention can be utilized as a top sheet | seat of a urine pad, a top sheet of a disposable diaper (especially center sheet arrange | positioned in the center part of a top sheet), etc. The absorbent article of the present invention can be used for absorbent articles such as disposable diapers and urine pads for infants or adults such as the elderly and persons with disabilities who need care.

2: front body, 6: back body, 6a, 6b: side edge, 11: surface sheet material, 13a, 13b, 113a, 23, 113b, 213a, 213b: ridge, 14a, 14b, 24, 114a, 114b, 214a, 214b: concave grooves, 15, 115, 215: corrugated surface sheet material, 17: back sheet material, 17a: surface of back sheet material, 18: top sheet, 19: long adhesive body, 20: back sheet, 21: Absorbent article sheet, 21a: one end, 21b: the other end, 22: absorber, 23: first supply roll, 25: molding roll, 25a: first uneven roll, 25b: second uneven roll, 27: 2nd supply roll, 26: Fastening tape, 29: Press roll, 29a: 3rd uneven | corrugated roll, 29b: Plain roll, 31: Adhesive coating part, 33: Cutting part, 35: Conveyance roll, 36: Body gather, 37a, 39a, 43a: recess, 37b, 39b, 43b: protrusion, 41, 42: hot melt adhesive, 43, 44: dancer roll, 43b, 43b, 44b, 44b: intermediate roll, 47: back surface Sheet, 49: Surface sheet, 51: Adhesive part, 53, 55: Touch roll, 57, 59: Guide roll, 100: Absorbent article sheet manufacturing apparatus, 200: Absorbent article, h1, h2, r1, r2: Apex, t: apex.

Claims (6)

A surface sheet material made of a liquid-permeable material, a first uneven roll having a plurality of annular recesses and a plurality of annular protrusions alternately formed on the surface, and a plurality of annular recesses and a plurality of rings on the surface Are sandwiched between the second concavo-convex rolls on which the convex portions are alternately formed, whereby the top sheet material is provided on both the front surface side and the back surface side along the flow direction with a plurality of concave grooves and a plurality of convex portions. A molding process for forming a wavy shape in which strips are alternately formed;
In a state where the shape of the surface sheet material formed into a corrugated shape is maintained, the surface sheet material formed into a corrugated shape is composed of a top portion of the plurality of protrusions formed on the back surface side and a liquid permeable material. Bonding process to obtain a long adhesive body by bonding the surface of the back sheet material,
An absorbent article sheet manufacturing step comprising cutting the obtained long adhesive body with a predetermined length to obtain a plurality of absorbent article sheets, and a method for producing an absorbent article sheet comprising :
The manufacturing method of the sheet | seat for absorbent articles which uses what gave the hydrophilic treatment to the nonwoven fabric which consists of thermoplastic resins as each of the said surface sheet material and the said back surface sheet material .   In the bonding step, between a third uneven roll having a plurality of annular recesses and a plurality of annular protrusions alternately formed on the surface thereof, and a plain roll having no recesses and protrusions formed on the surface thereof. The top sheet and the surface of the back sheet material are sandwiched between the top sheet material and the back sheet material formed into a corrugated shape, and pressed while heating the plain roll. The manufacturing method of the sheet | seat for absorbent articles of Claim 1 which makes it adhere | attach and obtains the said elongate adhesive body.   As said 1st uneven | corrugated roll and said 2nd uneven | corrugated roll, the cross-sectional shape of the top part of the said cyclic | annular convex part is circular arc shape, or the bottom face of the cyclic | annular said recessed part is concave shape, or both. The manufacturing method of the sheet | seat for absorbent articles of Claim 1 or 2 using a thing.   The absorptivity as described in any one of Claims 1-3 using what the width | variety of the said cyclic | annular convex part and the said cyclic | annular recessed part is the same as a said 1st uneven | corrugated roll and a said 2nd uneven | corrugated roll, respectively. A method for producing an article sheet.   The sheet | seat for absorbent articles manufactured by the manufacturing method of the sheet | seat for absorbent articles as described in any one of Claims 1-4. An absorber, at least partly made of a liquid-permeable material, a top sheet arranged to cover the surface of the absorber, and a liquid-impermeable material so as to cover the back surface of the absorber A backsheet disposed,
At least a part of the top sheet is an absorbent article sheet produced by the method for producing an absorbent article sheet according to any one of claims 1 to 4.
The absorbent article sheet is an absorbent article that is arranged such that the surface on which the plurality of concave grooves and the plurality of ridges are alternately formed contacts the wearer when worn.

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