JP4141398B2 - Method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to an absorbent article and a method for producing the same, and more particularly, to an absorbent article including an outer layer sheet that is flexible and excellent in texture and a method for producing the same.

  The disposable diaper generally uses a nonwoven fabric excellent in flexibility, breathability and the like for the outer layer sheet. The outer layer sheet is less likely to directly touch the skin of the wearer wearing the diaper, but is more flexible because it often touches the skin of a person other than the wearer, such as when holding the wearer. What has an excellent texture is desired.

Until now, the technique of the following patent document 1 and the following patent document 2 is proposed regarding the sheet | seat which uses a nonwoven fabric and is used for an absorbent article. In these techniques, slits and holes are formed in a nonwoven fabric or a multilayered nonwoven fabric to impart stretchability and elasticity to the properties of the nonwoven fabric. However, these sheets can be expected to have an improvement effect on stretchability and elasticity, but can hardly expect an improvement effect on the texture.
Moreover, regarding the sheet used for the absorbent article, a technique has been proposed in which a sheet provided with a large number of holes described in Patent Document 3 below is used as a surface material of the absorbent article. However, when assembling a sheet in which these holes are arranged as an absorbent article, when bonding with an adhesive such as hot melt, it is bonded from the hole portion to the surface side, that is, the skin side. The agent may ooze out, giving it a sticky, unpleasant feel, or inhibiting absorption.

JP 9-512504 gazette JP 11-291372 A Japanese Patent Laid-Open No. 10-80445

  Therefore, an object of this invention is to provide the absorbent article which can eliminate the above-mentioned inconvenience which the absorbent article of a prior art has, and its manufacturing method.

  In the present invention, after arranging a large number of holes in a zigzag array in a band-shaped base sheet, tension is applied to the base sheet so as to widen the holes, and the peripheral part of the holes is undulated. An adhesive is applied to the convex portion on one side of the base sheet formed with the undulation of the substrate to produce a continuous sheet, and the continuous sheet is supplied to the absorbent article production line to obtain the absorbent article. The object is achieved by providing a method for manufacturing an absorbent article to be manufactured.

  In the present invention, an adhesive is applied to one side of a sheet provided with a large number of holes while the die head of a coating apparatus is in contact with the sheet, and the sheet is supplied to a production line for absorbent articles. The object is achieved by providing a method for manufacturing an absorbent article for manufacturing an absorbent article.

  Further, the present invention is an absorbent article provided with an outer layer sheet, wherein the outer layer sheet has a plurality of holes arranged in a staggered arrangement in the base sheet, and the base sheet is formed so that the holes are widened. An absorbent article in which a tension is applied and the peripheral portion of the hole is undulated, and an adhesive is applied to a convex portion on one side of the base sheet formed along with the undulation of the peripheral portion. By providing the above, the above object is achieved.

ADVANTAGE OF THE INVENTION According to this invention, the flexible absorbent article excellent in the texture and its manufacturing method are provided.
Further, according to the present invention, there is provided a method for producing an absorbent article having excellent tactile sensation without causing bleeding of the adhesive.

  Hereinafter, the present invention will be described as a preferred embodiment based on an embodiment applied to a disposable diaper with reference to the drawings.

  FIG.1 and FIG.2 shows the disposable diaper of 1st Embodiment of this invention. In FIG. 1, the code | symbol 1 has shown the disposable diaper.

  As shown in FIG. 1, the diaper 1 has a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3 and an absorbent body 4 interposed between the two sheets 2 and 3, and is substantially vertically long. Is formed.

  The diaper 1 includes a crotch part B and an abdominal part C and a back part A that extend from the crotch part B back and forth. The back part A is a part located on the wearer's back side when using the diaper. The ventral part C is a part located on the wearer's ventral side when using the diaper.

  An outer layer sheet 7 is disposed on the outer surface (opposite the absorber side) of the back sheet 3. The outer layer sheet 7 forms the outer edge of the diaper 1.

  Fastening tapes 8 and 8 are attached to the left and right edges of the back side A. A landing tape 9 is attached to the outer layer sheet 7 of the ventral side C. The fastening tape 8 is fastened to the landing tape 9 when the diaper is worn.

  The absorber 4 is sandwiched between the top sheet 2 and the back sheet 3 and is fixed to the back sheet 3 with an adhesive 31 (see FIG. 2). The absorbent body 4 is configured such that the periphery of the absorbent core 41 is covered with a covering material 42.

  In the diaper 1, the waist parts 5 and 5 extending in the front-rear direction from the front and rear end edges of the absorber 4 and the leg parts 6 and 6 extending in the lateral direction from the left and right side edges are worn by the diaper wearer. A waist elastic member 51 and a leg elastic member 61 are provided to fit the person.

  Moreover, as shown in FIG. 2, the three-dimensional guard 21 is formed in the left-right both sides of the longitudinal direction in the surface sheet 2 side of the diaper 1, respectively. A three-dimensional guard elastic member 22 is disposed at the free end of the three-dimensional guard 21 to form a gather.

  In the diaper 1 of the present embodiment, as shown in FIG. 3, the outer layer sheet 7 is provided with a large number of holes 71 in the base sheet 70. In the peripheral part of each hole 71 of the base sheet 70, there are provided undulations having a joining part 71a with the top sheet 2 or the back sheet, and a standing part 71b that stands without being joined to the top sheet or the back sheet 3. ing. The outer layer sheet 7 is tensioned on the base material sheet 70 so that the holes 71 widen, the peripheral part of the hole 71 is undulated, and the convex shape on one side of the base material sheet 70 formed along with the undulation of the peripheral part. An adhesive 72 is applied to the portion, and the outer layer sheet 7 is bonded to the top sheet 2 or the back sheet 3 via the adhesive 72. The non-coated side of the adhesive 72 of the outer layer sheet 7 is directed outward. A large number of holes 71 are arranged in a staggered pattern (alternately).

  As a result, on the surface of the outer layer sheet 7 (the outer surface of the diaper 1), upright portions 71b formed with the undulation of the peripheral portion are shaped as pleated or pile-like convex portions. And the softness | flexibility and texture peculiar to the outer layer sheet 7 are show | played by these convex parts.

  As shown in I of FIG. 3, the undulating state of the peripheral portion of the hole 71 is formed by bonding portions 71a between the holes 71 and bonded with an adhesive 72, and both peripheral portions of the holes 71 become standing portions 71b. In some cases, as shown in FIG. 3 II, the peripheral edge portion of one hole 71 becomes a joint portion 71a and is bonded by an adhesive 72, and the other portion becomes a standing portion 71b.

  The material of the base sheet 70 is appropriately set according to the feel and appearance. Examples of the material of the base sheet 70 include a nonwoven fabric, a synthetic resin sheet, a pulp sheet, a woven fabric, a woven fabric, and a knitted fabric.

  As the nonwoven fabric used for the base sheet 70, heat roll nonwoven fabric, spunbond nonwoven fabric, nonwoven fabric combining spunbond (S) and meltblown (M) (SM, SMS, SMMS, SSMMS, etc.), air-through nonwoven fabric, A general nonwoven fabric such as spunlace can be used without particular limitation. Among these, an air-through non-woven fabric is particularly preferable from the viewpoint of obtaining a soft feel, a fluffy raised feeling, and a touch feeling like a towel.

  The fibers constituting the nonwoven fabric are preferably polyolefin fibers such as polyethylene, polypropylene, or a resin mainly composed of a propylene-ethylene random copolymer, polyethylene terephthalate fibers, or polyamide fibers. Among these, polyolefin fibers Is preferred. The fiber structure may be a single fiber, a core-sheath fiber, or a side-by-side fiber, and the use of a composite fiber or a mixed fiber is preferable for further improving the texture and touch. Fibers using a propylene-ethylene random copolymer, core-sheath fibers in which polyethylene terephthalate is a core, polyethylene is a sheath, and core-sheath fibers in which polypropylene is a core and polyethylene is a sheath, especially the texture and the touch are further improved. Preferred above. The fiber diameter is preferably 0.5 to 3.0 dtex, particularly 0.5 to 2.0 dtex from the viewpoint of texture. From the viewpoint of imparting leakage prevention to the nonwoven fabric, the fibers are preferably hydrophobic.

  Examples of the synthetic resin sheet used for the base sheet 70 include polyolefin films such as polyethylene and polypropylene, polyolefin copolymer films such as EVA, polyamide films, and polyester films.

The basis weight (basis weight before applying the tension) of the base sheet 70 has a good texture and flexibility, has sufficient strength in use, and realizes it at an economical cost. Is preferably 5 to 100 g / m ² , particularly preferably 5 to 50 g / m ² .

  The thickness of the base material sheet 70 (thickness before applying the tension) can be appropriately set according to the use and purpose. However, from the viewpoint of obtaining a tactile feel like a towel and a fluffy raised feeling, 0.01 ˜5.0 mm, particularly preferably 0.02 to 2.0 mm.

  The MD breaking strength of the base material sheet 70 (before the numerous holes 71 are arranged in a staggered arrangement) is 10 to 10 in terms of stretch opening properties, ruggedness uprightness, and stretch sheet workability. It is preferably 100 N / 50 mm, particularly 15 to 75 N / 50 mm. Here, the breaking strength is measured as follows by the tensile test mode of the universal testing apparatus, for example, as shown below.

<MD breaking strength test method>
A rectangular test piece of 200 mm in the machine flow direction (MD) and 50 mm in the direction perpendicular to the machine flow (CD) is prepared. This is measured at a measurement environment of 20 ° C., 65% RH, with a tensile speed of 300 mm / min and a distance between measurements of 150 mm in the tensile test mode of the universal testing device.

The number per unit area of the holes 71 provided in the base sheet 70 before applying the tension is appropriately set according to the number per unit area of the standing part of the surface of the outer layer sheet 7. The number is 1 to 50 pieces / cm ² , particularly 1 to 25 pieces / cm ² , from the viewpoint of obtaining easiness of standing parts, soft touch of the outer layer sheet 7, softness of appearance, and raising feeling. It is preferable that

  The form of the hole 71 disposed in the base sheet 70 (form before applying the tension) is not particularly limited as long as the undulation can be provided. Examples of the shape of the hole 71 include a slit shape, a circular shape, an elliptical shape, an oval shape, a convex lens shape, a rectangular shape, a rhombus shape, and a polygonal shape. A slit-like form and an axially symmetric form having a line-symmetrical axis (hereinafter referred to as a symmetric axis) are preferable from the viewpoints of further enhancing the stretch openability and raising the standing part. In particular, the slit-like hole is preferable in that the standing part of the peripheral part can be enlarged in a pleat shape or a pile shape when tension is applied.

  The length of one hole 71 before the tension is applied (if the hole is slit-shaped, the length is the same; if the hole is axially symmetric, it is the maximum length on the axis of symmetry) L1 (see FIG. 4) Is appropriately set according to the type, material, thickness, and basis weight of the first sheet. The length L1 is preferably set to 0.5 to 10 mm, particularly 1 to 5 mm from the viewpoint of obtaining the size of the fold-like or pile-like standing portion, the touch feeling like a towel, and the fluffy raising feeling.

  The numerous holes 71 provided in the base sheet 70 only need to be able to form standing parts by tension, and the manner of arrangement of the holes can be arbitrarily selected. From the viewpoint of easy formation of the upright portions and the ability to form a uniform upright portion, it is preferable that the holes form a line in a straight line intersecting the direction F in which the tension is applied. In particular, it is more preferable that the holes in each row are shifted in the direction F with respect to the holes formed in the adjacent rows, and a staggered arrangement in which the hole portions and the non-hole portions are alternately arranged. .

  The interval L2 (see FIG. 4) between the holes 71 in one row before applying the tension is appropriately set according to the type and material of the base sheet. The distance is 0.5 to 10 mm, especially 1 to 5 in consideration of the ease of forming a fold-like or pile-like standing portion, the sheet breakage at the time of stretch opening, stretch pore opening property, ease of stretching, and the like. 5 mm is preferable.

  Before applying the tension, an interval between adjacent rows of holes 71 (an interval between adjacent portions of adjacent holes) L3 (see FIG. 4) is appropriately determined according to the type and material of the base sheet 70. Is set. The distance is 0.5 to 10 mm, especially 1 to 5 in consideration of the ease of forming a fold-like or pile-like standing portion, the sheet breakage at the time of stretch opening, stretch pore opening property, ease of stretching, and the like. 5 mm is preferable.

  Before applying the tension, the holes 71 arranged in adjacent rows of the base sheet 70 are preferably arranged in positions that overlap each other when projected onto one of the rows. By setting it as such an arrangement | positioning form, the base material sheet 70 becomes easy to expand | extend and the standing part 71b of the peripheral part of the hole 71 can be enlarged in the shape of a pleat or a pile. A length L4 (see FIG. 4) where the holes overlap each other is appropriately set according to the type and material of the base sheet. The length L4 is in the range of 0 to 4.5 mm, particularly 0, considering the ease of forming a pleated or pile-like standing portion, the sheet breakage at the time of stretch opening, stretch pore opening property, ease of stretching, and the like. It is preferable to be set to ˜2 mm.

  Before applying the tension, the length direction of the holes 71 (in the case of a slit-like hole, the length direction thereof, in the case of an axially symmetric form, the symmetric axis direction) is aligned with the row direction R. However, as indicated by a one-dot chain line in FIG. 4, it may have a predetermined angle with respect to the direction R of the row, or a combination thereof. The angle θ (see FIG. 4) formed with the length direction of the hole 71 is appropriately set according to the type and material of the base sheet. The angle is preferably within ± 10 degrees in consideration of uniform stretch-opening property and ease of forming pleated or pile-like undulations.

  Before applying the tension, it is preferable that the direction R of the row of the holes 71 is aligned in a direction substantially orthogonal to the direction F (see FIG. 4) in which the tension is applied. By aligning the holes 71 in such a direction, the holes 71 can be easily extended, and a fold-like or pile-like standing portion can be formed. It should be noted that the row direction R can also be provided so as to intersect the direction F of applying the tension at an angle α within a range not impairing the effects of the present invention. The angle α is preferably 80 to 100 degrees.

  The material of the adhesive 72 is particularly preferably a hot-melt adhesive from the viewpoint that the drying time is short and the workability is good, and the adhesive is performed regardless of the material of the sheet.

Examples of the hot melt adhesive include rubber hot melt adhesives based on styrene elastomers and olefin hot melt adhesives based on amorphous polyalphaolefins (APAO).
Examples of the styrene elastomer include styrene / butadiene rubber (SBR), styrene / butadiene / styrene block copolymer (SBS), styrene / isoprene / styrene block copolymer (SIS), styrene / ethylene / butylene / styrene block copolymer. Examples thereof include a polymer (SEBS) and a styrene / ethylene / propylene / styrene block copolymer (SEPS).

  A conventionally well-known thing can be used for the other member which comprises the above-mentioned diaper 1 in the said technical field. For example, the surface sheet 2 is preferably a liquid-permeable sheet that allows permeation to pass through the absorbent body 4 and has a touch close to underwear. Examples of such a liquid-permeable sheet include a hydrophilic woven sheet. Examples thereof include cloth, nonwoven fabric, perforated nonwoven fabric, and perforated film. Examples of the back sheet 3 include a liquid-impermeable film with moisture permeability that allows a vapor to permeate and is stretched by adding a thermoplastic resin filler such as polyolefin. The absorbent core 41 is preferably a pile of fluff pulp as hydrophilic fibers and superabsorbent polymer particles, and is obtained by heat-treating a mixture of thermoplastic resin, cellulose fiber and superabsorbent polymer, What is generally called a polymer sheet is preferable. The superabsorbent polymer is preferably in the form of particles having a retention property capable of absorbing and retaining a liquid 20 times or more of its own weight and having a gelling property. Examples of such a superabsorbent polymer include starch. -Acrylic acid (salt) graft polymer, a saponified product of starch-acrylonitrile copolymer, a crosslinked product of sodium carboxymethyl cellulose, an acrylic acid (salt) polymer, and the like are preferable. Examples of the waist elastic member 51, the leg elastic member 61, and the three-dimensional guard elastic member 22 include thread rubber, flat rubber, film type rubber, stretchable nonwoven fabric, foamed polyurethane, and the like. Also good. Moreover, it is preferable that the strength at 150% elongation of each elastic member is 30 to 100 cN, and it is more preferable to use a plurality of low-efficiency elastic members so that the abdomen is not marked. The three-dimensional guard 21 is preferably a sheet having water repellency and air permeability, and is a thin film having a good texture, preferably a non-woven fabric.

Next, 1st Embodiment of the manufacturing method of the absorbent article of this invention is described based on the manufacturing method of the said diaper 1. FIG.
FIG. 5 schematically shows a continuous sheet manufacturing apparatus for the outer layer sheet 7 of the diaper 1. As shown in FIG. 5, the manufacturing apparatus 10 includes a perforating unit 11, a stretching unit 12, and an adhesive coating unit 13.

  The perforating means 11 includes a pair of rollers 111 and 112. The roller 111 is provided with a blade corresponding to the hole 71 on the peripheral surface portion. When using the raw sheet of the outer layer sheet 7 provided with the holes 71 in advance, the hole punching means 11 is not necessary.

  The stretching means 12 includes a pair of two rollers 121 and 122. In the stretching means 12, the speed of the downstream roller 122 is set to be faster than the speed of the upstream roller 121, and a predetermined tension is applied to the base sheet 70 by this speed difference.

  The adhesive coating means 13 is preferably a die coater type coating apparatus. The die coater type coating apparatus is configured to bring a die head (gun head) 131 of a die coater into contact with the convex portion on one side of the base sheet 70, and to apply the adhesive 72 discharged from the discharge port of the die head 131 to the base sheet. Apply directly to 70. In each of the die heads 131, a tip portion located downstream of the discharge port in the flow direction of the base sheet 70 is formed in a planar shape substantially parallel to the base sheet 70. Since this die coater type coating apparatus can be applied while the discharge port of the die head is in contact with the sheet, the adhesive is applied only to the portion in contact with the discharge port of the die head, that is, only the convex portion. Thereby, the base sheet 70 and the back sheet 3 to which the absorber 4 described later is fixed are partially joined at the convex portion, and the three-dimensional shape of the upright portion 71b is not crushed. Moreover, the softness | flexibility is excellent by joining in this way partially. Furthermore, since the adhesive is not applied to the opening of the hole 71, it is possible to prevent the adhesive from seeping out to the opposite side of the base sheet 70 from the joint with the back sheet 3, and blocking the product. It does not occur and can provide a comfortable touch without stickiness.

[Manufacturing process of outer layer sheet]
In the manufacturing method of the outer layer sheet 7 by the manufacturing apparatus 10, first, the base sheet 70 is fed out from the raw roll 700 and continuously supplied to the punching machine 11. That is, the base sheet 70 is continuously supplied from the original roll 700 to a composite sheet production line using an original supply mechanism (not shown) having a known feeding mechanism. A large number of the holes 71 are arranged in a staggered arrangement through the base sheet 70 between the pair of rollers 111 and 112.

  Next, the base sheet 70 in which a large number of holes 71 are arranged is supplied to the stretching machine 12 so that the holes 71 are widened in the base sheet 70 in which a large number of holes 71 are arranged in a staggered arrangement. Then, tension is applied in the length direction of the sheet to undulate the peripheral portion of the hole 71.

  The tension applied to the base sheet 70 is set according to the material of the base sheet 70 and the form, arrangement, and dimensions of the holes 71 provided in the base sheet 70. The tension is 0.5 to 10 N / 50 mm, particularly 0.75 to 5 N / 50 mm, taking into account the ease of forming a fold-like or pile-like standing portion, the sheet breakage at the time of stretch opening, and the stretch opening property. It is preferable that

Further, the stretching ratio in the direction of applying the tension of the base sheet 70 when the tension is applied is the use, purpose, material of the base sheet 70, the form of the holes 71 disposed in the base sheet 70, It is set according to the arrangement and dimensions. The stretching ratio is preferably 1 to 100%, particularly preferably 5 to 50%, taking into account the ease of forming a fold-like or pile-like standing portion, the sheet breakage during stretch opening, and the stretch opening property. . Here, the stretching ratio is, for example, the roll of the pair two pairs of stretching machine 12, the speed ratio [(V ₁₂₂ / V peripheral speed V ₁₂₂ of the peripheral velocity V ₁₂₁ in the first draw roll 121 the second stretching roll 122 _121-1 ) × 100].

  Next, the base material sheet 70 is supplied to the adhesive coating means 13. And the adhesive agent 72 is applied to the said convex-shaped part formed in the single side | surface of the base material sheet 70 by the adhesive agent coating means 13, and the continuous sheet for outer-layer sheets is produced.

The coating amount of the adhesive 72 is appropriately set according to the type, material, combination, type of adhesive, and the like of each sheet. Coating application amount, the adhesive strength, softness, texture, considering exudation, 0.5 to 5.0 g / m ^2, particularly preferably a 0.5 to 2.5 g / m ^2. The adhesive 72 is preferably applied to all the convex portions, but may not be partially applied as long as the effect of the present invention is not affected.

  Next, the obtained continuous sheet of the outer layer sheet 7 is supplied to the conveying line of the outer layer sheet 7 in the production line of the diaper 1 to manufacture the diaper 1.

  FIG. 6 schematically shows a part of the production line for the diaper 1. In FIG. 6, the arrangement steps of the elastic members 51 and 61, the fastening tape 8, the landing tape 9, the three-dimensional guard 21, and the three-dimensional guard elastic member 22 are omitted for convenience. This manufacturing method is a so-called longitudinal flow method in which the longitudinal direction of the absorbent body 4 is set in a direction orthogonal to the transport direction.

[Arrangement process of back sheet and absorber]
First, as shown in FIG. 6, a continuous body 34 in which the absorbent body 4 is fixed to the continuous sheet 30 of the back sheet 3 is supplied to the joining means 14, and the back sheet 3 and the absorbent body 4 from the continuous body 34 by the rotary cutter 140. Are separated and joined to the continuous sheet conveyance line of the outer layer sheet 7. And these are pinched | interposed between the joining drum 141 and the joining roll 142, and the back surface sheet 3 and the absorber 4 are adhere | attached and fixed to the approximate center part of the continuous sheet of the outer layer sheet 7 at predetermined intervals.

[Surface sheet placement process]
Next, the continuous sheet of the top sheet 2 is supplied to the top sheet joining means 15 downstream of the arrangement process of the back sheet 3 and the absorber 4 and joined to the continuous sheet conveyance line of the outer layer sheet 7. And these are pinched | interposed between the rolls 150 of the joining means 15, and the surface sheet 2 and the outer layer sheet | seat 7 are joined so that the absorber 4 may be coat | covered with the surface sheet 2. FIG.

[Leg hole formation process]
Next, the continuous body of the outer layer sheet 7 to which the top sheet 2 is bonded is supplied between the punching rolls 160 of the leg hole forming means 16 to form the semicircular recess 60 for the leg hole for the leg portion 6. , A diaper 1 continuum.

  Finally, the diaper 1 continuum is passed between the rotary cutters 170 of the cutting means 17 and separated into individual diapers 1.

  The diaper 1 manufactured in this way includes the outer layer sheet 7 and is flexible and excellent in texture.

  FIG. 7 shows a disposable diaper according to a second embodiment of the present invention. In FIG. 7, reference numeral 1 'denotes a diaper. In FIG. 7, the same reference numerals are given to portions common to FIG. 1, and description thereof is omitted. Therefore, the description of the diaper of the first embodiment is appropriately applied to a portion that is not particularly described.

The diaper 1 ′ of the present embodiment has a large number of holes partially disposed in the outer layer sheet and partially provided with undulations.
In the diaper 1 ′ of the present embodiment, a large number of holes 71 are arranged in a staggered arrangement only in the central portion of the outer layer sheet 7, and no holes 71 are arranged in both side portions. The hole 71 of the outer layer sheet 7 is provided so that its length direction is along the longitudinal direction of the diaper 1 ′. Then, the undulating portion is provided only in the central portion to give a soft and soft feel, and a desired strength is given to the side flap portions on both sides.

  Like the diaper 1 ′ of the present embodiment, by arranging a large number of holes partially and providing the undulation part partially, the undulation part is provided only in the part where the touch is required, and the other parts are provided. A desired strength can be imparted.

  The diaper 1 'of this embodiment can be manufactured in the same manner as the manufacturing method of the first embodiment except that the manufacturing method of the outer layer sheet is different. The outer layer sheet is also arranged in a staggered array of slit-like holes along the longitudinal direction (in the sheet flow direction) only in the center of the base sheet, and stretched in a direction substantially perpendicular to the flow by the meshing roll. Except for performing the above, it can be manufactured in the same manner as the outer layer sheet manufacturing method in the manufacturing method of the first embodiment.

Next, 2nd Embodiment of the manufacturing method of the absorbent article of this invention is described, referring drawings.
FIG. 8 schematically shows some steps of the second embodiment of the method for manufacturing an absorbent article of the present invention. In FIG. 8, reference numeral 18 denotes a nip roller. Further, the same reference numerals are given to the portions common to FIG. 5, and the description thereof is omitted.

  As shown in FIG. 8, in the manufacturing method of the absorbent article of the present embodiment, the discharge port of the die head 131 in the die coater type coating apparatus is provided on one side of the sheet 2 ′ in which a large number of holes 21 are arranged. The adhesive 22 is applied while being in contact with the sheet 2 ′, and the sheet 2 ′ is supplied as a top sheet to an absorbent article production line to produce the absorbent article. For the manufacturing process of the absorbent article after the sheet 2 ′ is supplied as the top sheet, a known method for manufacturing an absorbent article can be employed.

  As the sheet 2 ', a sheet provided with a large number of holes conventionally used for a surface sheet of an absorbent article can be used without particular limitation. Examples of the sheet include a net-like sheet and a sheet such as a three-dimensionally open nonwoven fabric. As in the present embodiment, the sheet may have the holes 21 disposed entirely or partially disposed. In the case of partial arrangement, for example, a hole is provided only in the central part of the top sheet of the disposable diaper, so that the absorbability and soft stool uptake can be improved.

  In the second embodiment, the die head 131 of the die coater of the coating apparatus 13 is brought into contact with one side of the sheet 2 ′, and the adhesive 22 discharged from the discharge port of the die head 131 is directly applied to the sheet 2 ′. In each of the die heads 131, the front end portion located on the downstream side in the flow direction of the sheet 2 'from the discharge port is formed in a planar shape substantially parallel to the sheet 2'. Thereby, it is possible to prevent the adhesive from oozing out from the hole 21 to the surface side, that is, the skin side, and to provide a comfortable feeling without stickiness.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not restricted to the above-mentioned embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably.

  In the said embodiment, although demonstrated based on the expansion | deployment type diaper 1, this invention is also various absorbent articles, such as disposable diapers (for example, underpants type diaper) other than a expansion | deployment type, and a sanitary napkin, and its manufacturing method. Can be applied.

  Moreover, the manufacturing method of the absorbent article of the present invention preferably supplies the continuous sheet to the absorbent article manufacturing line as an outer layer sheet or a surface sheet of the absorbent article, as in the above embodiments. A continuous sheet can also be supplied to the production line of an absorbent article as a sublayer between the absorber and the outer layer sheet or between the absorber and the top sheet.

It is the partial fracture | rupture top view seen from the outer layer sheet | seat side which shows typically 1st Embodiment which applied the absorbent article of this invention to the disposable diaper. It is XX arrow sectional drawing of the disposable diaper of the said embodiment. It is a principal part expanded sectional view which shows the arrangement | positioning state of the outer layer sheet | seat of the disposable diaper of the said embodiment. It is an enlarged plan view which shows typically the base material sheet of the outer layer sheet in the disposable diaper of the embodiment. It is a perspective view which shows typically the manufacturing process of the outer layer sheet in 1st Embodiment which applied the manufacturing method of the absorbent article of this invention to manufacture of the disposable diaper of the said embodiment. It is a perspective view which shows typically a part of manufacturing process of the disposable diaper by the said 1st Embodiment. It is the partial fracture | rupture top view (FIG. 1 equivalent view) seen from the outer layer sheet | seat side which shows typically 2nd Embodiment which applied the absorbent article of this invention to the disposable diaper. It is a perspective view which shows typically the manufacturing process of the surface sheet of the absorbent article in 2nd Embodiment of the manufacturing method of the absorbent article of this invention.

Explanation of symbols

1, 1 'disposable diaper (absorbent article)
2, 2 'Top sheet 21 Hole 22 Adhesive 3 Back sheet 4 Absorber 5 Waist part 6 Leg part 7 Outer layer sheet 71 Hole 71a Joint part 71b Standing part 72 Adhesive 8 Fastening tape 9 Landing tape 13 Coating means (Coating apparatus)
131 Die head

Claims (8)

  After arranging a large number of holes in the band-shaped base sheet, the base sheet was tensioned so as to widen the holes, and undulations were formed in the peripheral part of the holes. Manufacture of an absorbent article in which an adhesive is applied to a convex portion on one side of the base sheet to produce a continuous sheet, and the continuous sheet is supplied to an absorbent article production line to produce an absorbent article. Method.   The method for manufacturing an absorbent article according to claim 1, wherein the plurality of holes are arranged in a staggered arrangement.   The manufacturing method of the absorbent article of Claim 2 arrange | positioned in the position which the said hole arrange | positioned to the adjacent row | line | column mutually overlaps when it projects with respect to one side of this row | line | column.   The manufacturing method of the absorbent article in any one of Claims 1-3 which provide the said hole in slit shape.   The manufacturing method of the absorbent article in any one of Claims 1-4 which apply the said tension | tensile_strength in the length direction of the said base material sheet.   The absorbent article according to any one of claims 1 to 5, wherein the adhesive is applied while a die head of a coating apparatus is brought into contact with a convex portion on one side of the base sheet. Method.   The manufacturing method of the absorbent article in any one of Claims 1-6 in which the said continuous sheet comprises the outer layer sheet | seat of an absorbent article. An absorbent article provided with an outer layer sheet, wherein the outer layer sheet is provided with a plurality of holes in the base sheet, and tension is applied to the base sheet so that the holes are widened. The absorbent article is provided with an undulation, and an adhesive is applied to a convex portion on one side of the base sheet formed along with the undulation of the peripheral portion.

Images