JP5775250B2 - Method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to an absorbent article and a method for producing the absorbent article, and more particularly to an absorbent article having good fit and improved wearing feeling and a method for producing the 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. Among these, for example, as a tape-type disposable diaper, it is composed of each part of the front body, the crotch part, and the back body, and at least a part of the absorbent body and the surface of the absorbent body are disposed. A top sheet made of a liquid-permeable material, a back sheet made of a liquid-impermeable material arranged so as to cover the back surface of the absorber, and at least one on each of the left and right side edges of the back body, Examples include a fastening tape that fixes the back body and the front body, and a fastening area that is formed on the front body and fastens the fastening tape.

  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. Since leakage to the outside is prevented, excrement can be held inside the diaper.

  Examples of the absorbent body include those that are easy to bend in response to changes in the wearer's body shape and posture, and that have a groove formed along the longitudinal direction thereof, and those that have through holes formed in order to improve fit. (For example, see Patent Documents 1 to 3).

Japanese Patent No. 3616077 Japanese Patent No. 3746706 Japanese Utility Model Publication No. 2-84623

  However, the absorbent articles described in Patent Documents 1 to 3 have a problem that the wearing feeling is deteriorated due to the grooves and through holes formed in the absorbent body in order to improve the fit. That is, the absorber has a large step due to the groove and the through-hole, and when this step is pressed against the skin, the groove or the opening of the through-hole can easily be traced due to the step. There was also a problem of feeling pain. Furthermore, when the wearer is an adult, he / she spends a lot of time in the same posture in addition to being heavier than a child, so the effect of the above problem is significant and may cause bed slipping. there were.

  This invention is made | formed in view of the problem which such a prior art has, and provides the manufacturing method of the absorbent article which a fitting property is favorable, and a wear feeling is improved, and an absorbent article. is there.

  According to the present invention, the following absorbent article and method for manufacturing the absorbent article are provided.

[ 1 ] An absorbent body formed into a shape having a groove part that forms an opening on one surface, and a non-woven fabric that is arranged so as to cover the one surface of the absorbent body and at least a part thereof is a liquid-permeable material And a back sheet made of a liquid-impermeable material , and a method for producing an absorbent article , comprising: a top sheet comprising: the absorber in said recess of a mold recess having an inverted shape is formed in the shape, by depositing the absorbent material, the first obtaining an absorbent having a groove you form an opening on one side And a component comprising a long top sheet made of a nonwoven fabric that is the liquid permeable material and the obtained absorbent body on a long back sheet made of a liquid impermeable material, and the absorbent body , The one surface of the absorber The laminate having the long topsheet disposed on the surface and the long backsheet disposed on the other surface side is obtained, the obtained laminate is cut at a predetermined position, and the topsheet And a second step of obtaining an absorbent article by sealing the backsheet with a peripheral edge of the absorber, and the depression of the mold used in the first step is the absorber. An inner peripheral surface having a shape matching the outer peripheral shape of the absorbent body, and a bottom surface having a shape complementary to the shape of the surface on the side where the top sheet of the absorber is disposed, and the bottom surface has a plurality of through holes. Formed by a suction region capable of sucking the absorbent material, and a non-suction region that does not suck the absorbent material, and is formed of a convex portion having a tapered slope. The inner wall surface of the groove portion in the thickness direction of the absorber In the cross-section obtained by cutting the absorber in the width direction orthogonal to the longitudinal direction of the absorber, the opening width in the orthogonal surface is a slope that continuously decreases from the one surface toward the other surface, The opening width is configured to be continuously reduced from the one surface toward the other surface, and the shape of the opening of the groove portion has a long side along the longitudinal direction of the absorber. A manufacturing method of an absorbent article (first manufacturing method of an absorbent article) in which the groove is formed with an opening only on the one surface.

[ 2 ] An absorbent body formed into a shape having a groove part that forms an opening on one surface, and a non-woven fabric that is disposed so as to cover the one surface of the absorbent body and at least a part thereof is a liquid-permeable material And a back sheet made of a liquid-impermeable material . The bottom surface of the absorbent article includes: a top sheet comprising: groove part of the absorbent material is aspirated into said recesses of the mold that is formed recess projecting, by depositing the absorbent material into said recess, you form an opening in one side of A step of obtaining an absorbent body having a portion, and a constituent member including a long top sheet made of a nonwoven fabric which is the absorbent body and the liquid permeable material on the long back sheet made of a liquid impermeable material. Arrange the absorber, the absorbent A laminated body having the long top sheet disposed on the one surface side of the body and the long back sheet disposed on the other surface side is obtained, and the obtained laminated body is placed at a predetermined position. Cutting and sealing the top sheet and the back sheet at the periphery of the absorber to obtain an absorbent article, and the absorbent material as the mold in the step A A suction region for suction, a non-suction region that does not suck the absorbent material , and is formed between the suction region and the non-suction region. A low suction region having a low suction force of the absorbent material, and a plurality of through holes are formed in the suction region and the low suction region. Through hole formed in the suction area The opening diameter is smaller than the through-hole formed in the suction region, or the number per unit area of the through-hole formed in the low suction region is formed in the suction region. The inner wall surface of the groove portion of the obtained absorber has an opening width in a plane perpendicular to the thickness direction of the absorber from the one surface to the other surface. In the cross section obtained by cutting the absorber in the width direction orthogonal to the longitudinal direction of the absorber, the opening width is changed from the one surface to the other surface. The shape of the opening of the groove part is an elongated shape whose long side is formed along the longitudinal direction of the absorber, and the groove part is On one side Method of manufacturing an absorbent article and forms a viewing opening (second method for producing the absorbent article).

  The absorptive article of the present invention has the effect that fitting nature is good and a feeling of wear is improved.

  The method for producing an absorbent article of the present invention has an effect that an absorbent article having good fit and improved wearing feeling can be produced.

It is a plan view partially cutaway showing an embodiment of the intake Osamusei article is a diagram showing a state viewed absorbent article from the top sheet side. It is a general | schematic expanded sectional view which shows the cross section which cut | disconnected the absorbent article shown in FIG. 1 along the A-A 'line. It is a partially notched top view which shows another embodiment of an absorbent article, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a general | schematic expanded sectional view which shows the cross section which cut | disconnected the absorbent article shown in FIG. 3 along the B-B 'line. It is a partially notched top view which shows another embodiment of an absorbent article, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a general | schematic expanded sectional view which shows the cross section which cut | disconnected the absorbent article shown in FIG. 5 along the C-C 'line. It is a partially notched top view which shows another embodiment of an absorbent article, and is a figure which shows the state which looked at the absorbent article from the top sheet side. It is a general | schematic expanded sectional view which shows the cross section which cut | disconnected the absorbent article shown in FIG. 7 along the D-D 'line. Is a plan view partially cutaway showing the tape-type diaper which is another embodiment of the intake Osamusei article expand tape type diaper is a diagram showing a state viewed from the top sheet side. It is a schematic perspective view showing a pants-type diaper which is another embodiment of the intake Osamusei article is a diagram showing a state viewed pant diaper from the front. It is a schematic view showing an example of a manufacturing step of the method of manufacturing the intake Osamusei article. It is a perspective view which shows the forming drum part shown in FIG. It is a principal part expanded sectional view which shows the cross section which cut | disconnected the forming drum shown in FIG. 11 along the E-E 'line. Illustrates another example of steps of the method of manufacturing the intake Osamusei article is an enlarged sectional view corresponding to FIG. 13. Illustrates another example of steps of the method of manufacturing the intake Osamusei article is a perspective view corresponding to FIG. 12. It is a principal part expanded sectional view corresponding to FIG. 13 of the forming drum shown in FIG.

  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] Absorbent article:
An embodiment of the intake Osamusei article, as the absorbent article 10a shown in FIG. 1, an absorber 22a having a groove 17a having an opening 14a is formed on one surface 23a, one surface of the absorber 22a 23a is disposed so as to cover the top sheet 18 made of at least a part of a liquid permeable material and the other surface 23b of the absorber 22a (see FIG. 2), and is a liquid impermeable material. As shown in FIG. 2, the groove portion 17a has an opening width in a plane orthogonal to the thickness direction of the absorber 22a (T direction shown in FIG. 2) from one surface 23a to the other. It becomes smaller as it goes to the surface 23b. Since the absorbent article comprised in this way has a groove part in an absorber, it is easy to bend according to a wearer's body shape and a change of a posture, and fit property is favorable. In addition, when the groove portion is one in which openings are formed on one surface and the other surface (that is, a groove penetrating the absorber (through groove)), there is an advantage that the absorber is hardly distorted. Furthermore, since the groove width formed in order to improve the fitting property has a smaller opening width in a surface perpendicular to the thickness direction of the absorber, the groove portion is formed. The problem (for example, a large level | step difference hits skin and it feels a pain) does not arise easily, and the feeling of wear is improved.

Incidentally, FIG. 1 is a plan view partially cutaway showing an embodiment of the intake Osamusei article shows a state viewed absorbent article 10a from the top sheet 18 side, FIG. 2, FIG. 1 It is a schematic sectional drawing which shows the cross section which cut | disconnected the absorbent article 10a shown to along AA 'line. In addition, in FIGS. 1-16, the same code | symbol is attached | subjected to the same component.

  The absorbent article 10a shown in FIG. 1 can be used, for example, as a sanitary napkin that absorbs menstrual blood, a sheet of cage that absorbs cage, and the like. Examples of the absorbent article of the present invention include disposable diapers that absorb excrement such as urine (for example, tape-type diapers, pants-type diapers, urine pads, etc.) in addition to the sanitary napkins and vaginal sheets. be able to.

[1-1] Absorber:
The absorber is a member made of an absorbent material in order to absorb and hold the wearer's urine. As shown in FIG. 2, the absorber 22a is interposed between the top sheet 18 and the back sheet 20. Has been placed. And as above-mentioned, this absorber 22a has the groove part 17a by which the opening was formed in at least one surface 23a (surface by which the top sheet 18 is arrange | positioned), and this groove part 17a is the absorber 22a. The opening width in the surface orthogonal to the thickness direction is reduced from one surface 23a toward the other surface 23b. By providing the absorbent body having such a configuration, it is possible to obtain an absorbent article that has good fit as described above and improves the feeling of wearing.

  Examples of the absorbent material constituting the absorber include fluff pulp, super absorbent polymer (hereinafter referred to as “SAP”), a hydrophilic sheet, and the like. As the fluff pulp, it is preferable to use wood pulp or non-wood pulp defibrated into cotton, and as SAP, it is preferable to use sodium polyacrylate. And as a hydrophilic sheet | seat, it is preferable to use the tissue, the absorbent paper, and the nonwoven fabric which performed the hydrophilic treatment.

  When using fluff pulp and SAP as materials, the SAP content is preferably about 10 to 500 parts by mass with respect to 100 parts by mass of fluff pulp. In addition, SAP may be mixed uniformly in each mat | matte of fluff pulp, and may be arrange | positioned at the layer form between the layers of the multilayer fluff pulp.

  Here, in the present specification, “the opening width in the surface perpendicular to the thickness direction of the absorber is reduced from one surface to the other surface” specifically means that the inner wall surface of the groove is It means a slope or a stepped surface, and more specifically, a slope like the inner wall surface 15a shown in FIG. 2 or a stepped surface like the inner wall surface 15b shown in FIG. Can do.

The inner wall surface of the groove, the opening width in the plane perpendicular to the thickness direction of the absorber Ru slope der as continuously decreases as toward the other side from the one surface. Such a slope has a flat surface where the wearer's skin comes into contact, and therefore, unlike conventional absorbent articles, it is difficult to cause inconveniences such as a large step hitting the skin and feeling pain. Is further improved.

  For example, in the absorbent body 22a of the absorbent article 10a shown in FIG. 1, the opening width in the surface orthogonal to the thickness direction (T direction in FIG. 2) of the absorbent body 22a is directed from one surface 23a to the other surface 23b. It is an example provided with the groove part 17a which has the inner wall surface 15a which consists of a slope which becomes small continuously according to this.

In addition, as a reference example, the inner wall surface of the groove portion may have a stepped shape in which the opening width in the surface orthogonal to the thickness direction of the absorber gradually decreases from one surface to the other surface. Can be mentioned . Compared to the case where a large step is formed as in the groove portion of the absorbent body of the conventional absorbent article, since the stepped shape is larger, the wearer's skin is in contact with the skin. Such force is distributed. For this reason, it is difficult to cause problems such as pain when the step hits the skin, and the wearing feeling is further improved.

  For example, the absorbent body 22b of the absorbent article 10b shown in FIG. 3 has an opening 14b on one surface 23a, and an opening on a surface orthogonal to the thickness direction (T direction in FIG. 4) of the absorbent body 22b. This is an example including a groove portion 17b having a step-like inner wall surface 15b whose width gradually decreases from one surface 23a toward the other surface 23b.

  In addition, when the inner wall surface of a groove part is the said step shape, if the said conditions are satisfy | filled, there will be no restriction | limiting in particular, The number of steps may be two steps like the absorbent article 10b shown in FIG. One stage or three or more stages may be used.

The shape of the opening of the groove, if example embodiment, elongated, mention may be made of a shape such as a substantially rectangular shape having a circular, curved sides. In the present invention, Ru elongated der whose long sides are formed along the longitudinal direction of the absorbent body. Such an elongated shape has the advantage that the fit of the absorbent article is further improved because the absorbent body is easily bent in the longitudinal direction. For example, the absorbent article 10a shown in FIGS. 1 and 2 has an absorbent body 22a having a bottomed groove portion 17a that forms an elongated opening 14a whose long side is formed along the longitudinal direction of the absorbent body 22a. This is an example. Note that in the case of a groove portion having an elongated shape, the pair of inner wall surfaces (for example, the inner wall surface 15a shown in FIGS. 1 and 2) extending in the longitudinal direction are preferably inclined surfaces.

  When it has the groove part 17a which forms the elongate opening 14a like the absorber 22a of the absorbent article 10a shown in FIG. 1, the width | variety of the said opening (it shows with the code | symbol d1 in FIG. 1) is 5-50 mm. The thickness is preferably 10 to 40 mm. When the said width | variety is too narrow, there exists a possibility that the fitting property at the time of wear may fall. In addition, it becomes difficult to sufficiently incline the inner wall surface of the opening, and the wearing feeling may not be sufficiently improved. On the other hand, when the said width | variety is too wide, there exists a possibility that the absorptive power of an absorber may fall. Moreover, there exists a possibility that an absorber may tear from a groove part.

  In addition, when it is an elongate opening, it is not limited to linear form like the absorbent article 10a shown in FIG. 1, A curved shape (namely, substantially square shape which has a curved side) may be sufficient.

In the present invention, has a plurality of grooves for forming the opening, the plurality of grooves, Ru are arranged along the longitudinal direction of the absorbent body. Having such a plurality of grooves has an advantage that, in addition to having a good fit, urine flowing into the grooves is suppressed from flowing along the grooves. Moreover, in the case of a through groove, since the movement of the pulp and SAP which comprise an absorber is restrict | limited, there exists an advantage that an absorber is hard to bend. For example, the absorbent body 22c of the absorbent article 10c shown in FIGS. 5 and 6 has four groove portions 17c that form circular openings 14c, and these four groove portions 17c extend along the longitudinal direction of the absorbent body 22c. An example is shown. Note that the inner wall surface 15c of the groove portion 17c is a slope whose opening width (diameter) in a surface orthogonal to the thickness direction of the absorber 22c continuously decreases from one surface to the other surface . The intake absorbent body, a plurality of grooves for forming the opening of the elongated shape, are arranged along the longitudinal direction of the absorbent body, that form a groove so as to constitute a dashed across multiple grooves.

  Note that the plurality of circular openings may all have the same size as the openings 14c of the absorbent article 10c shown in FIG. 5 or may have different sizes.

  Further, the number and position of the circular openings (that is, the number and position of the groove portions) are not particularly limited as long as the above conditions are satisfied, and can be set as appropriate.

The groove is intended to form an opening only on the surface of the hand (i.e., those not penetrate the absorber) Ru der. As a reference example, one having openings on one side and the other side (ie, penetrating the absorber) can be mentioned . When the groove portion does not penetrate the absorbent body (that is, a hole having a bottom surface), the absorbent article easily bends in the groove portion, and when excrement such as urine enters the groove portion, Since an absorber absorbs the said excretion, generation | occurrence | production of a leak can be prevented. On the other hand, when the groove portion penetrates the absorbent body (that is, a through-hole), there is an advantage that the absorbent article is more easily bent in the groove portion, and the fitting property is further improved. Moreover, since the movement of the pulp and SAP which comprise an absorber is restrict | limited, there exists an advantage that an absorber is hard to twist.

  For example, the absorbent body 22a of the absorbent article 10a shown in FIG. 1 and FIG. 2 shows an example having a groove portion 17a that forms an opening 14a only on one surface 23a. Further, for example, an absorbent body 22d of the absorbent article 10d shown in FIGS. 7 and 8 shows an example having groove portions 17d that form openings 14d1 and 14d2 on both surfaces of one surface 23a and the other surface 23b.

  In addition, when the groove part is a through-hole, it may be formed from one end edge 24a to the other end edge 24b of the absorber 22d as in the groove part 17d shown in FIG. That is, the absorber may be divided into a plurality by the groove. The inner wall surface 15d of the groove 17d has an opening width (distance between the adjacent absorber 22d1 and absorber 22d2) in a plane orthogonal to the thickness direction of the absorber 22d (22d1, 22d2) from one surface. The slope is such that it continuously decreases toward the other surface.

  Although there is no restriction | limiting in particular in the inclination of the inner wall face of a groove part, For example, it is preferable that it is 10-60 degrees, and it is still more preferable that it is 20-45 degrees. If the inclination is less than 10 °, the width of the non-suction portion may be too large. On the other hand, if it exceeds 60 °, the feeling of wearing may be deteriorated.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional absorbent article, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

[1-2] Top sheet:
The top sheet is a sheet that is at least partially made of a liquid-permeable material and is located on the skin side of the wearer when the absorbent article is used.

  At least a part (all or a part) of the top sheet is made of a liquid-permeable material so that the absorbent body disposed on the back sheet side can absorb the wearer's urine. Usually, at least near the surface of the absorber, it is made of a liquid-permeable material that can permeate the wearer's urine and body fluid. As long as at least a part is made of the liquid permeable material, the entire top sheet is not necessarily made of the liquid permeable material.

The liquid-permeable material forming the topsheet, can be mentioned nonwoven fabric. Among, polypropylene, polyethylene, polyester, nylon be those subjected to hydrophilization treatment nonwoven fabric made of (R) thermoplastic resin and the like are preferable. 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.

[1-3] Backsheet:
The back sheet is made of a liquid-impermeable material disposed on one surface side of the top sheet, and is a sheet positioned on the wearer's clothing side when the absorbent article is used.

  The back sheet is made of a liquid-impermeable material in order to prevent the wearer's urine from leaking outside the absorbent article. The arrangement method is not particularly limited, and for example, a configuration in which the back sheet is arranged so as to coincide with the top sheet can be employed. In addition, from the viewpoint of preventing leakage of urine absorbed by the absorber, it is preferable to arrange a back sheet made of a liquid-impermeable material at least in a portion where the absorber exists.

  Examples of the liquid-impermeable material constituting the back sheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, it is preferable to use a microporous polyethylene film. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid-impermeable but has moisture permeability, so it is possible to prevent stuffiness inside the absorbent article. There is an advantage.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the touch (feel).

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Among these, it is preferable to use a dry nonwoven fabric and a wet nonwoven fabric made of a thermoplastic resin such as polyethylene, polypropylene, and polyester.

[1-4] Other sheets:
The absorbent article of the present invention can include, for example, a liquid permeable sheet, a second sheet, and the like as the other sheets in addition to the top sheet and the back sheet described above. When the liquid permeable sheet is arranged, the liquid permeable sheet once holds and diffuses excrement such as urine that could not be absorbed by the absorber, so that the entire absorber can be used effectively, There is an advantage that the excretion absorption rate is improved.

  Examples of the material constituting the liquid permeable sheet include tissue paper, woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

  The liquid permeable sheet is preferably disposed at least between the absorber and the top sheet and between the absorber and the back sheet. For example, in the absorbent article 10a shown in FIGS. 1 and 2, the upper liquid permeable sheet 25 is disposed between the absorbent body 22a and the top sheet 18, and the lower liquid permeable sheet is interposed between the absorbent body 22a and the back sheet 20. The example which arrange | positioned the property sheet | seat 26, and adhere | attached these both side edges mutually is shown.

  As the second sheet, the same as the second sheet described later can be used.

[2] Disposable diapers:
Next, as already described above, the absorbent article of the present invention can be applied to disposable diapers such as tape-type diapers, pants-type diapers, and urine pads. And in a tape type diaper and a pants type diaper, there are a 1 piece type and a 2 piece type, respectively, and the absorbent article of the present invention can be applied to any type.

  In the present specification, the “tape-type diaper” means, for example, an absorbent body 22e and one surface side of the absorbent body 22e as in the tape-type diaper 100 shown in FIG. A top sheet 18 made of a liquid permeable material and a back sheet 20 made of a liquid impermeable material disposed on the other surface side of the absorber 22e, and a front body 2, a crotch part 4 and a back body 6 Disposable further comprising a fastening tape 7 configured to extend from the left and right side edges 6a, 6b of the back body 6, and for fixing the back body 6 to the front body 2 It is a diaper. As shown in FIG. 9, the absorbent body 22e has a bottomed groove portion 17e that forms an elongated opening 14e.

  Further, in the present specification, the “pants-type diaper” means, for example, a joint portion by joining corresponding side edges of the front body 2 and the back body 6 like the pants-type diaper 110 shown in FIG. 8. A diaper having a waist opening 9 and a pair of leg openings 12a and 12b formed in advance and configured in a pants shape. As shown in FIG. 10, the absorber 22f has a bottomed groove portion 17f that forms an elongated opening 14f.

  The “one-piece type” includes a top sheet, a back sheet, and an absorbent body. An absorbent body that has an absorption / holding function is interposed (built in) between the top sheet and the back sheet, so that the mounting function is provided. It is a type of diaper that is configured integrally with a top sheet and / or a back sheet.

  “Two-piece type” means an absorbent main body that functions to absorb and retain the excrement of the wearer (absorption / holding function) and an exterior member that functions to encapsulate the wearer's body (mounting function) And a diaper of the type in which an absorbent main body is disposed inside the exterior member.

  The said absorptive main body is a member provided with an absorber, a top sheet, and a back sheet as a component, and manufactures by inserting an absorber between a top sheet and a back sheet, and sealing the peripheral part of an absorber. be able to. An absorptive main body is comprised by the size which covers at least the crotch part of a diaper. However, in order to ensure the effect of preventing leakage, it is preferable to have a size that covers not only the crotch part but also a part of the front body and the back body. The absorptive main body can be fixed to the exterior member using, for example, a hot melt adhesive.

  The exterior member is a member having a mounting function for encapsulating the wearer's body, and specifically, is a sheet-like member that forms the front body, the crotch portion, and the back body. The two-piece diaper absorbs and retains the excretion fluid of the wearer, and the absorption / retention function is exclusively performed by the absorbent main body. Therefore, the liquid-impermeable material is used as the material for the exterior member. There is no need to use. Examples of the material constituting the exterior member include a nonwoven fabric composed of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins.

  In this specification, “front body” refers to the portion that covers the abdomen (front of the body) of the wearer when the diaper is worn on the wearer, and “inseam” refers to the wearer wearing the diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

  Hereinafter, a 1 piece type tape type diaper (tape type diaper of this embodiment) is explained.

  Although the top sheet used for the tape type diaper of this embodiment may be constituted by a single sheet material, it may be constituted by a plurality of sheet materials. For example, the form which comprises the top sheet arrange | positioned at the upper surface side of an absorber and the top sheet arrange | positioned at the part of the side flap of a diaper by a different sheet | seat is also utilized frequently. The tape-type diaper 100 shown in FIG. 9 has a top sheet 18 (center sheet 18a) made of a liquid-permeable material at the center of the diaper, and the side flap 5 portion of the diaper is resistant to liquid permeation. It is the example which has arrange | positioned the top sheet 18 (side sheet 18b) which consists of ventilation water-repellent material which shows.

  Moreover, what was comprised so that it might correspond with the external shape of a diaper may be used for a back sheet | seat, and a sheet | seat material (cover sheet | seat) may be bonded together on the outer surface side of a back sheet | seat. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet. In addition, in the tape-type diaper 100 shown in FIG. 9, the example which has arrange | positioned the backsheet 20 of the shape corresponding to the external shape of a diaper is shown. Also, the back sheet only needs to be arranged in a range covering at least the absorber, but the back sheet is arranged in a range slightly larger than the absorber, and the side flap portion corresponding to the side of the wearer is configured by the cover sheet and the side sheet. Then, it can be set as the disposable diaper which was more excellent in breathability. You may comprise the said side flap part with a separate nonwoven fabric etc.

[2-1] Solid gather:
The tape type diaper of this embodiment is provided with a three-dimensional gather to prevent side leakage of urine excreted by the wearer. The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather serves as a breakwater, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure currently used for the conventional absorbent article can be employ | adopted for the structure of a three-dimensional gather. For example, a stretchable material (three-dimensional gather stretchable material 36 (36a, 36b) shown in FIG. 9) is arranged on a part of the water-repellent sheet material, and the three-dimensional gather stretchable material forms a gather (gutter) on the sheet material. Etc. can be used suitably.

  The three-dimensional gather may be formed of a sheet material that is completely different from the top sheet and the back sheet, but may be formed by folding back a top sheet such as a center sheet or a side sheet.

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, in the tape-type diaper 100 shown in FIG. 9, a pair of three-dimensional gathers 26 (26a, 26b) are continuously formed from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. An example is shown. Note that at least one pair of solid gathers must be formed, but two or more pairs may be formed.

  The three-dimensional gather may be an inversion gather that tilts toward the inside of the diaper, or may be an outside gather that tilts toward the outside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction. For example, the tape-type diaper 100 shown in FIG. 9 is an example in which the three-dimensional gather 26 (26a, 26b) is inverted and gathered.

[2-2] Fastening tape:
A fastening tape is a tape for making a wearer wear a tape type diaper. There are no particular restrictions on the shape and structure of the diaper so long as it can be attached to the wearer by fixing the back and abdomen of the diaper to a pant-type diaper.

  A tape-type diaper 100 shown in FIG. 9 is one in which two pairs of fastening tapes 7 are arranged on both side edges of the back body 6. These fastening tapes 7 are configured to be capable of being attached to a front patch 11 disposed on the outer surface of the front body 2. By sticking the fastening tape 7 to the front patch 11, the back body 6 and the front body 2 of the diaper are fixed to each other, and the diaper can be attached to the wearer.

  In addition, although the tape-type diaper 100 shown in FIG. 9 is provided with two pairs of fastening tapes 7, the same effect can be obtained even if the fastener tape 7 is provided with only one pair or three or more pairs. be able to.

  As the fastening tape, any one of an adhesive tape, a mechanical fastener and the like may be used. Mechanical fasteners are, for example, convex members (hook members) having a large number of protrusions (such as hooks, mushrooms, hooks, etc.) formed on the surface and loop fibers disposed on the surface, or short fibers A combination of a configured groove member (loop material) such as a non-woven fabric is often used. In this fastener, the hook material is superimposed on the surface of the loop material, and a large number of protrusions of the hook material are engaged with the surface of the loop material, so that both members can be peeled and firmly fixed. It can be done.

[2-3] Various elastic materials:
In the tape-type diaper of this embodiment, it is preferable to arrange a leg-surrounding elastic material and a waist-circular elastic material.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented. Further, when the leg stretchable material is disposed, the leg stretchable material contracts on both sides of the absorbent body when the diaper is changed. For this reason, urine and bodily fluid accumulate in the groove, and the diaper can be easily replaced without spilling urine or bodily fluid.

  For example, a tape-type diaper 100 shown in FIG. 9 is an example in which leg gathers are formed by arranging two leg elastic members 40 linearly along the longitudinal direction of the diaper. The leg-around elastic member 40 is made of rubber thread. In addition, it is not necessary to arrange | position the leg periphery elastic material linearly, for example, you may arrange | position in a curve along the curve of the leg periphery opening part of a diaper.

  The leg stretchable material is preferably formed with a leg stretchable material 40 in a portion outside the upright line 46 of the three-dimensional gather 26, for example, like a tape-type diaper 100 shown in FIG. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  Note that the tape-type diaper 100 shown in FIG. 9 shows an example in which the shape, arrangement position, number of arrangements, and the like of the leg-surrounding elastic member 40 are bilaterally symmetric. You may arrange | position so that the material 40 may become asymmetrical. In the tape-type diaper 100 shown in FIG. 9, an example in which two leg elastic members 40 are arranged on one side is shown, but only one piece may be arranged on one side, or three or more pieces may be arranged on one side. May be. In addition, when a plurality of leg elastic members are used, their thickness, stretch rate, and the like can be appropriately set according to the purpose.

  Next, the waist elastic material is an elastic material disposed along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, and urine leakage from around the waist can be prevented. Moreover, the fitting property of the diaper to a wearer becomes favorable and can prevent the diaper slipping down.

  The tape-type diaper 100 shown in FIG. 9 is an example in which a band-shaped waist-circular stretchable material 42 is disposed along the edge of the body 6 after that. The belt-shaped waist elastic member 42 can be formed of a stretchable foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side).

  For these stretchable materials, it is possible to determine the constituent material, the elongation rate of the material, the stretched state at the time of fixation, etc. in consideration of the degree of gather contraction and the like.

  As said elastic material, the elastic material currently used for the conventional absorbent article can be used. Specific examples include thread rubber made of an elastic material such as natural rubber and synthetic rubber (urethane rubber, etc.), flat rubber, stretchable net, stretchable film, stretchable foam (urethane foam, etc.), and the like.

  The stretchable material is preferably fixed in an expanded state in order to exert a sufficient stretch force. For example, when the elastic material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 120 to 400%, and more preferably fixed in a stretched state of 200 to 300%. By fixing in the extended state in such a range, a sufficient stretching force can be applied.

  Further, the stretchable material can be fixed to other constituent members of the diaper by an adhesive or other means. Examples of the fixing method include an adhesive method using a hot melt adhesive and other highly fluid adhesives, a heat sealing method including heat sealing, and a method using welding using ultrasonic waves.

[3] Method for producing first absorbent article:
The manufacturing method of the 1st absorptive article of the present invention is a manufacturing method of an absorptive article which obtains the absorptive article of the present invention mentioned above, and is the mold in which the hollow which has the shape of reversal of the shape of an absorber was formed. A first step of obtaining an absorbent body having a plurality of grooves forming openings in at least one surface by depositing an absorbent material in the recess; and the obtained absorbent body on the long backsheet; and Laminate having a constituent member including a long topsheet and having an absorbent body, a long topsheet disposed on one surface side of the absorbent body, and a long backsheet disposed on the other surface side And a second step of obtaining an absorbent article by cutting the obtained laminate at a predetermined position. By providing such a process, it is possible to manufacture an absorbent article having good fit and improved wearing feeling.

[3-1] First step:
In the first method for producing an absorbent article, first, an absorbent material is deposited in a recess of a mold having a recess having an inverted shape of the absorber, thereby opening an opening on at least one surface. A first step of obtaining an absorber having a plurality of grooves to be formed is performed. By providing this process, the absorber which has the groove part mentioned above can be obtained easily.

  In this step, for example, an absorbent body manufacturing apparatus 200 as shown in FIG. 11 can be used. The absorbent body manufacturing apparatus 200 is disposed on the outer peripheral surface of the forming drum 50 (molding die) having a plurality of (four) recess portions 55 (recesses) formed on the outer peripheral surface of the forming drum 50. A pulp laminator 51 and a SAP injection nozzle 52 are provided. As shown in FIG. 12, the forming drum 50 has a recess 55 having a reverse shape of the desired absorber shape on the outer peripheral surface thereof. That is, the recess 55 has a shape complementary to the shape of the inner peripheral surface 31 having a shape that matches the outer peripheral shape of the desired absorber and the shape of one surface of the absorber (the surface on which the top sheet is disposed). And a bottom surface 32. The bottom surface 32 is formed with a plurality of through holes 35 (see FIG. 13), a suction region capable of sucking the absorbent material, and a slope 36a of a convex portion 45a having a tapered slope 36a. . The convex portion 45a is a non-suction region that does not suck the absorbent material. And the convex part 45a is being fixed to the bottom face 32 with the flat head screw 65. FIG. In addition, when the said convex part 45a is used, the absorber 22a of a shape as shown in FIG.1 and FIG.2 can be manufactured. FIG. 13 is a partial cross-sectional view showing a cross section cut along line E-E ′ of FIG. 11.

  In addition, in the manufacturing method of this absorbent article, the shape of a convex part can be suitably selected according to the shape of a desired groove part. For example, when manufacturing the absorber 22b as shown in FIG. 3 and FIG. 4, it is preferable to use one having a stepped surface 36b like the convex portion 45b shown in FIG. FIG. 14 is a cross-sectional view showing a cross section corresponding to FIG.

  Further, as shown in FIG. 11, in the absorbent body manufacturing apparatus 200, the long back sheet 29 is sent in the Y direction shown in FIG. 11, and the constituent members including the absorbent body 22 a are arranged on the long back sheet 29. Is done. The long back sheet 29 is supplied from a back sheet roll (not shown).

  The absorptive material used in this step can be the same as the absorptive material constituting the absorber described above.

  In order to deposit the absorbent material in the depression in this step, for example, pulp (absorption) is formed from the pulp laminator 51 in the depression 55 on the outer peripheral surface of the forming drum 50 that continuously rotates in the X direction shown in FIG. For example, by supplying the SAP from the charging nozzle 52. At this time, by forming the inside of the forming drum 50 with a negative pressure by, for example, a suction pump, the absorbent material is sucked into the recess 55 through the through hole 35 formed in the suction region 61 shown in FIG. An absorbent material can be deposited in the recess 55. Thus, the some absorber 10a (refer FIG. 11) can be obtained.

  In addition, although the forming drum 50 shown in FIG.11 and FIG.12 is the example which formed the hollow part 55 corresponding to the planar shape of a some absorber at the fixed space | interval along the circumferential direction, it is not restricted to this, A continuous hollow portion (a hollow portion having a shape obtained by continuously forming the hollow portion 55 without a gap) is formed along the circumferential direction of the forming drum, and the forming drum is formed in the continuous hollow portion. A ring-shaped convex part (for example, a ring-shaped convex part having a tapered slope) that is continuous along the circumferential direction is arranged, and the absorbent body is continuously formed by this forming drum, and then the predetermined length is obtained. A plurality of absorbers may be formed by cutting. The forming drum 150, which will be described later, also has a continuous depression as described above, and an absorbent body is continuously formed by disposing continuous ring-shaped convex portions, and then cut into a predetermined length. A plurality of absorbers may be formed.

[3-2] Second step:
Next, in the first absorbent article manufacturing method, a constituent member including the obtained absorbent body and the long top sheet is disposed on the long back sheet, and the absorbent body, one surface of the absorbent body A laminated body having a long top sheet disposed on the side and a long back sheet disposed on the other surface side is obtained, and the obtained laminated body is cut at a predetermined position to obtain an absorbent article. Two steps are performed.

  The long back sheet is a long back sheet, and is used to constitute the above-described back sheet. Further, the long top sheet is a long top sheet, and is for constituting the above-described top sheet.

  In addition to the absorber and the long top sheet, examples of the constituent members constituting the laminate include a long second sheet (long second sheet), a liquid permeable sheet, and the like, which are materials for the second sheet. . The second sheet is a sheet that is disposed on one surface side of the absorber (for example, between the absorber and the top sheet) and diffuses liquid such as urine and body fluid. By providing this second sheet, the absorption rate of urine, body fluids, etc. is reduced even when a sufficient space is not formed between the top sheet and the absorber due to the posture of the wearer and the like. It is difficult to prevent leakage of urine, body fluid, and the like due to a decrease in absorption rate.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used. As a liquid-permeable sheet, the same thing as the liquid-permeable sheet mentioned above can be illustrated.

  Furthermore, when manufacturing a disposable diaper as an absorbent article, in addition to the absorbent body, the long top sheet, and the long second sheet, the above-described various stretchable materials and the like are disposed as constituent members. Specifically, the absorbent body 22e, the leg elastic member 40, and the waist elastic member 42 are placed on the long back sheet so as to have a structure like the tape-type diaper 100 shown in FIG. Thereafter, a long top sheet is placed. In this way, a laminate (diaper laminate) is obtained.

  In addition, the said laminated body is formed by mutually bonding the laminated | stacked long topsheet and long backsheet. The joining method of the long top sheet and the long back sheet can be performed by a conventionally known method. For example, a method using a hot melt adhesive or the like can be mentioned.

  The method for cutting the laminate can be performed by a conventionally known method. For example, the method using a cutter, a cutting roll, etc. can be mentioned.

  When manufacturing a tape-type diaper as an absorbent article, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (R cut) to form the opening around the leg. Then, a tape-type diaper can be obtained by attaching a fastening tape and cutting it into individual diapers at a predetermined interval.

  In addition, FIG. 11 has shown typically the process for obtaining the absorbent article further provided with a liquid-permeable sheet other than an absorber, a top sheet, and a back sheet as a structural member which comprises a laminated body. . This will be specifically described below.

  First, the absorbent body 10 a obtained in the first step is placed on the long lower liquid-permeable sheet 43 supplied from the lower liquid-permeable sheet roll 56. Then, while arrange | positioning the elongate upper liquid permeable sheet 44 so that the surface on the opposite side to the side which arrange | positioned the elongate lower liquid permeable sheet 43 of the absorber 10a may be coat | covered, the 1st adhesive roll 48 may be provided. Thus, the long lower liquid permeable sheet 43 and the long upper liquid permeable sheet 44 are bonded to each other. Note that an adhesive is applied to the long upper liquid-permeable sheet 44 in advance by an adhesive application unit 47.

  Next, the long back sheet 29 is disposed so as to cover the outer surface of the long lower liquid permeable sheet 43 and the long top sheet so as to cover the outer surface of the upper liquid permeable sheet 44. 30 and the long back sheet 29 and the long top sheet 30 are bonded to each other by the second adhesive roll 49. The long back sheet 29 is preliminarily coated with an adhesive by an adhesive coating unit (not shown). In this way, an absorbent article continuum is obtained. Next, a plurality of absorbent articles can be obtained by cutting the obtained continuous absorbent article at predetermined positions.

[4] Method for producing second absorbent article:
The manufacturing method of the 2nd absorptive article of the present invention is a manufacturing method of the absorptive article which obtains the absorptive article of the present invention mentioned above, and is in the hollow of the forming die in which the dent in which a part of the bottom was projected was formed. A step of obtaining an absorbent body having a plurality of grooves forming openings on at least one surface by sucking the absorbent material and depositing the absorbent material in the depression, on the long backsheet, The structural member including the obtained absorbent body and the long top sheet is disposed, the absorbent body, the long top sheet disposed on one surface side of the absorbent body, and the long disposed on the other surface side. A step of obtaining a laminate having a length back sheet and cutting the obtained laminate at a predetermined position to obtain an absorbent article, and a suction region for sucking the absorbent material as a mold in the step A And a part of the bottom surface protrudes and absorbs A method using a non-suction region that does not suck material, and a recess formed between the suction region and the non-suction region, and a low suction region in which the suction force of the absorbent material is lower than that of the suction region. is there. According to such a process, the absorptive article which has good fit nature and a feeling of wear can be manufactured.

[4-1] Step A:
In the second method for manufacturing an absorbent article, first, the absorbent material is sucked into a depression of a molding die in which a depression with a part of the bottom surface is formed, and the absorbent material is deposited in the depression. Then, step A is performed to obtain an absorber having a plurality of grooves that form openings on at least one surface. And as a shaping | molding die in this process, it is the suction area | region which attracts | sucks an absorptive material, the part which said part of the bottom face protruded, a non-suction area | region which does not attract | suck an absorptive material, and a suction area | region and a non-suction area | region. A thing in which the hollow which has the low suction area | region located in between and the suction force of an absorptive material lower than a suction area | region is formed is used. By providing this process, the absorber which has the groove part mentioned above can be obtained easily.

  In this step, for example, an absorbent body manufacturing apparatus including a forming drum 150 (molding die) as shown in FIG. 15 can be used. As this absorber manufacturing apparatus, the thing similar to the absorber manufacturing apparatus 200 shown in FIG. 11 except having the forming drum 150 can be used.

  As shown in FIG. 15, the forming drum 150 has a plurality of indentations 155 (indentations) having a bottom surface 32 on the outer peripheral surface thereof. As shown in FIG. 16, each recess 155 is a suction region 61 b that sucks the absorbent material, and a part of the bottom surface of the recess 155 protrudes, and does not suck the absorbent material. It has the area | region 62 and the low attraction | suction area | region 61a located between the attraction | suction area | region 61b and the non-attraction | suction area | region 62, and the attraction | suction force of an absorptive material is lower than the attraction | suction area | region 61b. A plurality of through holes 35 are formed in the suction region 61b and the low suction region 61a. Further, as shown in FIG. 16, the through hole 35a (35) formed in the low suction region 61a has a smaller opening diameter than the through hole 35b (35) formed in the suction region 61b. . And the non-suction area | region 62 is formed of the convex part 45c of square pillar shape as shown in FIG. When such a forming drum 150 is used, a groove portion having an inclined surface (inner wall surface) whose opening width in a surface orthogonal to the thickness direction of the absorber decreases from the one surface toward the other surface is formed. An absorber (see, for example, FIGS. 3 and 4) can be obtained. 16 is a cross-sectional view showing a cross section corresponding to FIG.

  The absorptive material used in this step can be the same as the absorptive material constituting the absorber described above.

  In this step, an absorbent body having a predetermined shape is formed by depositing the absorbent material in the depression while sucking the absorbent material into the depression of the molding die in which a depression with a part of the bottom surface is formed. obtain. Specifically, first, the inside of the forming drum 150 is set to a negative pressure by, for example, a suction pump so that the absorbent material can be sucked into the recess of the mold. Next, the forming drum 150 is continuously rotated in the X direction shown in FIG. Thereafter, pulp (absorbent material) is supplied from the pulp laminating machine 51 into the recess 155 on the outer peripheral surface of the forming drum 150, and SAP is further supplied from the charging nozzle 52. In this way, the absorbent material is deposited in the recess 155. At this time, since the through hole 35a of the low suction region 61a has a smaller opening diameter than the through hole 35b of the suction region 61b, the suction force of the low suction region 61a is weaker than the suction force of the suction region 61b. Yes. Therefore, the thickness of the absorbent material deposited on the low suction region 61a is smaller than the thickness of the absorbent material deposited on the suction region 61b. Therefore, the absorber having the desired shape can be obtained.

  In addition, as a method of making the suction force of the low suction region 61a weaker than the suction force of the suction region 61b, in addition to the method described above (that is, a method of changing the opening diameter of the through hole), the low suction region 61a A method of reducing the density of through-holes in, that is, the number of through-holes formed in the bottom surface per unit area compared to the density of the through-holes in the suction region 61b can be exemplified.

[4-2] Step B:
Next, in the method for producing the second absorbent article, the constituent member including the obtained absorbent body and the long top sheet is disposed on the long back sheet, and the absorbent body, one surface of the absorbent body A laminated body having a long top sheet disposed on the side and a long back sheet disposed on the other surface side is obtained, and the obtained laminated body is cut at a predetermined position to obtain an absorbent article B Perform the process. This step can be performed in the same manner as in the second step, using the same components as those in the second step described above.

  The absorptive article of the present invention can be used conveniently as a diaper for infants or adults such as elderly people and persons with disabilities who need care. Moreover, the manufacturing method of the absorbent article of this invention can be employ | adopted as a manufacturing method of diapers for adults, such as an elderly person and a disabled person for infants or those who require nursing care.

2: Front body, 4: Crotch part, 5: Side flap, 6: Rear body, 6a, 6b: Side edge, 7: Fastening tape, 8: Joint part, 9: Opening around waist, 10a, 10b, 10c, 10d: Absorbent article, 11: Front patch, 12a, 12b: Leg opening, 14a, 14b, 14c, 14d1, 14d2, 14e, 14f: Opening, 15a, 15b, 15c, 15d: Inner wall surface, 17a, 17b 17c, 17d, 17e, 17f: Groove, 18: Top sheet, 18a: Center sheet, 18b: Side sheet, 20: Back sheet, 22a, 22b, 22c, 22d, 22d1, 22d2, 22e, 22f: Absorber, 23a: one surface, 23b: the other surface, 24a: one edge, 24b: the other edge, 26, 26a, 26b: solid gather, 2 : Upper liquid permeable sheet, 26: Lower liquid permeable sheet, 29: Long back sheet, 30: Long top sheet, 31: Inner peripheral surface, 32: Bottom surface, 36, 36a, 36b: Three-dimensional gather stretchable material , 35, 35a, 35b: through-hole, 36a: slope, 36b: stepped surface, 40: elastic material around leg, 42: elastic material around waist, 43: long lower liquid permeable sheet, 44: long Upper liquid permeable sheet, 45a, 45b, 45c: convex portion, 46: standing line, 47: adhesive application portion, 48: first adhesive roll, 49: second adhesive roll, 50, 150: forming drum, 51: Pulp laminating machine, 52: Input nozzle, 55, 155: Recessed part, 56: Lower liquid-permeable sheet roll, 61, 61b: Suction area, 61a: Low suction area, 62: Non-suction area, 65: Dish Screw, 100: Tape type Mutsu, 110: pant diaper, 200: absorbent body production device, d1: width.

Claims (2)

An absorbent body formed into a shape having a groove portion that forms an opening on one surface, and a top made of a non-woven fabric that is arranged so as to cover the one surface of the absorbent body and at least a part of which is a liquid-permeable material A sheet and a backsheet that is arranged so as to cover the other surface of the absorbent body and is made of a liquid-impermeable material .
Wherein the absorber in the shape of inverted in shape the recess of the mold which is formed with a recess, by depositing the absorbent material, the obtaining absorber with a groove you form an opening on one side One process,
On the long backsheet made of a liquid-impermeable material, a constituent member including the obtained absorbent body and a long topsheet made of a nonwoven fabric that is a liquid-permeable material is disposed, and the absorbent body and the absorbent body A laminate having the long topsheet disposed on the one surface side and the long backsheet disposed on the other surface side is obtained, and the obtained laminate is cut at a predetermined position. And a second step of obtaining the absorbent article by sealing the top sheet and the back sheet at the periphery of the absorber,
The hollow of the mold used in the first step is complementary to the shape of the inner peripheral surface of the shape that matches the outer peripheral shape of the absorber and the shape of the surface on the side where the top sheet of the absorber is disposed. A bottom surface having a general shape, the bottom surface comprising a suction region in which a plurality of through-holes are formed and capable of sucking the absorbent material, and a convex portion having a tapered slope. A non-suction area that does not suction, and
The inner wall surface of the groove portion of the obtained absorbent body is a slope whose opening width in a surface perpendicular to the thickness direction of the absorbent body continuously decreases from the one surface toward the other surface, In the cross section obtained by cutting the absorber in the width direction orthogonal to the longitudinal direction of the absorber, the opening width is configured to be continuously reduced from the one surface toward the other surface, and the shape of the opening of the grooves, the long side is an elongated shape is formed along the longitudinal direction of the absorbent body, the groove, the which forms an opening only on one side absorbent Article manufacturing method. An absorbent body formed into a shape having a groove portion that forms an opening on one surface, and a top made of a non-woven fabric that is arranged so as to cover the one surface of the absorbent body and at least a part of which is a liquid-permeable material A sheet and a backsheet that is arranged so as to cover the other surface of the absorbent body and is made of a liquid-impermeable material .
The absorbent material is aspirated into said mold recess portion of the bottom surface is projected is formed depressions, by depositing the absorbent material into said recess, you form an opening on one side and a step of obtaining an absorbent having a groove,
On the long backsheet made of a liquid-impermeable material, a constituent member including the obtained absorbent body and a long topsheet made of a nonwoven fabric that is a liquid-permeable material is disposed, and the absorbent body and the absorbent body A laminate having the long topsheet disposed on the one surface side and the long backsheet disposed on the other surface side is obtained, and the obtained laminate is cut at a predetermined position. And B step for sealing the top sheet and the back sheet at the periphery of the absorber to obtain an absorbent article,
As the mold in the step A, a suction region that sucks the absorbent material, a non-suction region that does not suck the absorbent material, and a suction region that is formed by a convex part from which a part of the bottom surface protrudes, Using the depression formed between the non-suction region and the low suction region having a lower suction force of the absorbent material than the suction region,
A plurality of through holes are formed in the suction region and the low suction region, and the through hole formed in the low suction region has an opening diameter compared to the through hole formed in the suction region. Or the number per unit area of the through holes formed in the low suction region is smaller than the density of the through holes formed in the suction region,
The inner wall surface of the groove portion of the obtained absorbent body is a slope whose opening width in a surface perpendicular to the thickness direction of the absorbent body continuously decreases from the one surface toward the other surface, In the cross section obtained by cutting the absorber in the width direction orthogonal to the longitudinal direction of the absorber, the opening width is configured to be continuously reduced from the one surface toward the other surface, and the shape of the opening of the grooves, the long side is an elongated shape is formed along the longitudinal direction of the absorbent body, the groove, the which forms an opening only on one side absorbent Article manufacturing method.

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