WO2015129367A1 - Production method for absorbent body - Google Patents
Production method for absorbent body Download PDFInfo
- Publication number
- WO2015129367A1 WO2015129367A1 PCT/JP2015/052149 JP2015052149W WO2015129367A1 WO 2015129367 A1 WO2015129367 A1 WO 2015129367A1 JP 2015052149 W JP2015052149 W JP 2015052149W WO 2015129367 A1 WO2015129367 A1 WO 2015129367A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slit
- absorber
- absorbent
- absorbent body
- precursor
- Prior art date
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/15642—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres by depositing continuous layers or pads of fibrous material on single sheets or webs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/533—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/53409—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad having a folded core
Definitions
- This invention relates to the manufacturing method of the absorber used for an absorbent article.
- Patent Document 1 describes an absorber in which a large number of through holes penetrating the back surface are formed on the absorber surface.
- the absorber surface is formed by disposing a hole forming roll having a large number of protrusions on the roll surface and an anvil roll having a recess at a position corresponding to the protrusions, and allowing the absorber to pass between both rolls. It is manufactured by forming a through-hole.
- Patent Document 2 an elastic body that is fixed to the absorber side in the central region in the short direction of the product and applies a contracting force with respect to the arrangement direction, and an absorber in the vicinity of a region where the contracting action of the elastic body works.
- Absorbent products having slits formed are described.
- This slit uses a roller cutter provided with blades arranged parallel to each other on the outer periphery of the roller, or is provided with blades arranged non-parallel so as to approach and separate from each other on the outer periphery of the roller. It is formed by using a roller cutter.
- the present invention is a method for producing an absorber having a slit by making an incision in the thickness direction of the absorber precursor while conveying the absorber precursor in one direction.
- the absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor.
- a softening step of softening the compressed portion by deforming.
- FIG.1 (a) is a top view which shows the skin opposing surface side (surface sheet side) of the sanitary napkin as an example of the absorbent article provided with the absorber manufactured according to this invention
- FIG.1 (b) FIG. 3 is an extraction plan view showing only the absorbent body of the sanitary napkin.
- FIG. 2 is a schematic cross-sectional view taken along the line II-II in FIG.
- FIG. 3 is a perspective view schematically showing an apparatus used for manufacturing the absorbent body shown in FIG.
- FIG. 4 is an enlarged cross-sectional view showing the main part of the cutter roll in the apparatus shown in FIG.
- FIG. 5 is a schematic view of the apparatus shown in FIG. 3 as viewed from the side.
- FIG. 6 is a schematic diagram (corresponding to FIG.
- FIG. 8A to FIG. 8D are schematic views showing the arrangement of the winding portions of the bending means in the embodiment.
- the present inventors use a slitting device having a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll to push the slit into the absorber. It was found that when the width of the cutting blade is widened from the viewpoint of durability or the like, a compressed portion is easily formed around the slit. If such a compressed portion exists around the slit of the absorbent body, the rigidity around the slit increases, and the advantages of providing the slit in the absorbent body may not be fully exhibited.
- an object of the present invention relates to an absorber manufacturing method and a manufacturing apparatus that can eliminate the above-described drawbacks of the prior art.
- the sanitary napkin 1 which is an example of the absorbent article which has the absorber manufactured by this invention is demonstrated.
- the sanitary napkin 1 includes a liquid-retaining absorbent body 4, a surface sheet 2 disposed on the skin facing surface side of the absorbent body 4, and a non-skin facing surface of the absorbent body 4. It has an absorptive main body 5 having a back sheet 3 disposed on the side, and has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal thereto.
- a skin opposing surface is a surface which faces a wearer's skin side at the time of wear of an absorbent article in an absorbent article or its structural member (for example, absorbent main body 5), and is a non-skin opposing surface Is the surface of the absorbent article or its component that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn.
- the longitudinal direction X coincides with the longitudinal direction of the absorbent article (absorbent body, absorbent body), and the lateral direction Y is perpendicular to the width direction (longitudinal direction) of the absorbent article (absorbent body, absorbent body).
- the absorptive main body 5 is disposed on the abdomen (front side) of the wearer relative to the excretion part facing part B disposed opposite to the wearer's liquid excretion part (such as the vaginal opening) when worn and the excretion part facing part B when worn.
- the front portion A and the rear portion C arranged on the back side (rear side) of the wearer rather than the excretory portion facing portion B at the time of wearing are provided in the vertical direction X.
- the napkin 1 further includes a pair of wing portions 7, 7 extending outward in the lateral direction Y from both side portions along the vertical direction X of the excretory portion facing portion B of the absorbent main body 5. have.
- the top sheet 2 covers the whole area of the skin-facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4.
- the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 to be described later.
- a side flap portion 6 is formed.
- the back sheet 3 and the side sheet 10 are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal, and the like at the extended portions from both side edges along the longitudinal direction X of the absorber 4.
- the top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive.
- the absorbent body 4 has a laminated structure in which a main body absorbent sheet 401 and a central absorbent sheet 402 are laminated as shown in FIG. 2, and as shown in FIGS. B has a multilayer portion 42.
- the multilayer part 42 is a part where the number of laminated absorbent sheets 401 and 402 constituting the absorbent body 4 is larger than the part located around the multilayered part 42.
- the multilayer part 42 in this embodiment is thicker than the part located in the circumference
- the absorbent body 4 includes a main absorbent body 40 that forms the outer shape of the absorbent body 4, and an auxiliary absorbent body 41 that is smaller than the main absorbent body 40 that is arranged on a part of the main absorbent body 40. Yes.
- the auxiliary absorber 41 is located at least in the excretory part facing part B.
- the absorbent body 4 is preferably composed only of a laminated structure of absorbent sheets 401 and 402.
- the absorbent body 4 has a thin thickness, a high absorbent capacity, stability of folding processing, and freedom of shape deformation. From the point of view, it is preferable to use an absorbent sheet in which particles of a superabsorbent polymer are held between fiber layers.
- the main absorbent body 40 has a folded structure of a main body absorbent sheet 401 containing pulp. Specifically, the main absorbent body 40 is formed by folding the main body absorbent sheet 401 inwardly at positions of folding lines 401 a and 401 b extending along the vertical direction X. That is, the main body absorbent sheet 401 is folded at both ends. At this time, the positions of the folding lines 401a and 401b are adjusted so that the inwardly folded portions of the main body absorbent sheet 401 partially overlap each other. Therefore, the main absorbent body 40 has a laminated structure of two layers and three layers made of the main body absorbent sheet 401.
- the auxiliary absorbent body 41 has a folded structure of the central absorbent sheet 402 containing pulp. Specifically, the auxiliary absorbent body 41 folds the central absorbent sheet 402 inward along a fold line 402a extending along the longitudinal direction X at a portion located outward from the fold line 402a. Next, along the fold line 402b, the part located outward from the fold line 402b is folded inward toward the part that is folded first.
- the fold lines 402a and 402b are formed at positions that divide the length in the lateral direction Y of the central absorbent sheet 402 into approximately three equal parts. As a result, the central absorbent sheet 402 is in a folded state with three windings. Therefore, the auxiliary absorbent body 41 has a three-layer structure composed of the central absorbent sheet 402.
- the central absorbent sheet 402 that is in a folded state with three windings is disposed inside the main body absorbent sheet 401 that is in a folded state with both ends folded. That is, the main body absorbent sheet 401 and the central absorbent sheet 402 have a nested folding structure. As a result, in the laminated structure of the main body absorbent sheet 401 and the central absorbent sheet 402, it extends outward from at least a part of the peripheral edge of the central absorbent sheet 402, specifically from the entire region of the peripheral edge. A main body absorbent sheet 401 is laminated.
- the center absorbent sheet 402 which comprises this auxiliary
- Each layer of the absorbent sheet laminated in five layers in the multilayer portion 42 and three layers in the portions other than the multilayer portion 42 is an “absorbent layer” in the present invention.
- the main absorbent body 40 having a folded structure of the main body absorbent sheet 401 has a substantially rectangular shape with rounded corners in plan view, and extends from the front part A to the rear part C via the excretory part facing part B.
- the auxiliary absorbent body 41 having a folded structure of the central absorbent sheet 402 has a substantially rectangular shape in plan view, and is arranged from the excretory part facing part B to the rear part C in the vicinity thereof.
- the auxiliary absorbent body 41 is laminated on the skin facing surface side of the main body absorbent sheet 401 constituting the main absorbent body 40, instead of being disposed inside the main absorbent body 40 composed of the folded main body absorbent sheet 401. Alternatively, it may be laminated on the non-skin facing surface side.
- a pair of side sheets 10, 10 are arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 5.
- the pair of side sheets 10 and 10 are each a linear first joining line 11 located in the excretory part facing part B, and the longitudinal direction X of the first joining line 11 (front part A and rear part C). It joins to the absorptive main body 5 (surface sheet 2) with the linear 2nd joining line 12 located in this.
- the first joining line 11 has a curved shape that protrudes outward in the lateral direction Y in plan view
- the second joining line 12 has a linear shape (zigzag line shape) that extends in the longitudinal direction in plan view.
- the side sheet 10 is made of a water-repellent nonwoven fabric.
- the side flap portions 6 project greatly outward in the lateral direction Y at the excretory portion-facing portion B, whereby a pair of side flap portions 6 are provided on both the left and right sides along the longitudinal direction X of the absorbent main body 5.
- the wing portions 7, 7 are extended.
- the top sheet 2 and the back sheet 3 extend outward in the longitudinal direction X from the front end and the rear end in the longitudinal direction X of the absorbent body 4.
- the end seal portion is formed by bonding to each other by a known bonding means such as an agent, heat sealing, ultrasonic sealing or the like.
- the wing part 7 is used by being folded back to the non-skin facing surface side of the crotch part of clothes such as shorts.
- the wing portion 7 has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is positioned on the side of the absorbent main body 5 in a plan view.
- a wing part adhesive part (not shown) for fixing the wing part 7 (napkin 1) to clothing (not shown) such as shorts is formed.
- the wing portion 7 that is folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhered and fixed to the crotch portion by the adhesive portion.
- the main body adhesion part (not shown) for fixing the absorptive main body 5 to clothes, such as shorts, is also formed in the non-skin opposing surface of the absorptive main body 5.
- the boundary line between the absorbent main body 5 and the wing portion 7 is a straight line (not shown) that connects the roots in the longitudinal direction X of the wing portion 7.
- the surface sheet 2 and the absorber 4 are dented integrally on the skin opposing surface (skin opposing surface of the surface sheet 2) of the absorptive main body 5 toward the back surface sheet 3 side.
- the linear groove is formed so as to extend in the horizontal direction Y in the vertical groove 51 extending in the vertical direction X in the excretory part facing part B and in the front part A and the rear part C, respectively.
- the first and second lateral grooves 52 and 53 are formed.
- channel can be formed in accordance with a conventional method by embossing, such as a pressing process (what is called embossing) with or without heat (what is called embossing), or ultrasonic embossing.
- the surface sheet 2 and the absorber 4 are not shown in the figure, but are bonded by an adhesive or integrated by thermal fusion or the like.
- the absorbent body 4 is formed with a plurality of longitudinal slits 43 along the longitudinal direction X dispersed in the excretory part facing part B.
- the vertical slits 43 are formed in a state of being distributed in both the vertical direction X and the horizontal direction Y.
- the vertical slit 43 is formed by cutting the absorber 4 in the thickness direction, and penetrates the laminated structure of the absorbent sheets 401 and 402 constituting the absorber 4. It is preferable.
- the vertical slits 43 are preferably not formed in the top sheet 2 and the back sheet 3 disposed above and below the absorber 4.
- Each vertical slit 43 is individually independent, and a non-slit portion 43 ′ is located between adjacent vertical slits 43.
- Each vertical slit 43 is surrounded by a non-slit portion 43 ′ around the entire periphery.
- the vertical slit 43 is formed by cutting the absorber 4 in the thickness direction, and is formed from a cut having substantially no width, or preferably 1.5 mm. It has the following narrow space.
- the width means the length of the vertical slit 43 in a direction orthogonal to the direction in which the vertical slit 43 extends.
- the absorbent body 4 has a plurality of rear slits 45 extending in the rear part C located behind the excretory part facing part B so as to have a longitudinal direction in a direction intersecting the longitudinal direction X of the napkin 1.
- the rear slit 45 is a plane in which the position of the central portion 45a in the longitudinal direction of the slit 45 is located on the front portion A side with respect to the positions of both end portions 45b and 45b in the longitudinal direction. It has a view shape, and more preferably has a plan view shape that is convexly curved toward the front portion A side.
- the back slit 45 is formed in multiple numbers at intervals in the longitudinal direction X of the absorbent article.
- FIG. 3 schematically shows an apparatus for manufacturing the absorbent body 4 in the sanitary napkin 1 described above.
- the absorbent body of the sanitary napkin 1 described above or the slit forming step using the cutting device 60 and the softening step using the softening means 70 are used.
- the continuous body 4 is manufactured.
- the cutting device 60 used in the slit forming step includes a cutter roll 61 having cutting blades 63 and 64 on the peripheral surface, and an anvil roll 62 that receives the cutting blades 63 and 64 of the cutter roll 61.
- the cutting blades 63 are cutting blades for forming the vertical slits 43, and a plurality of cutting blades 63 are formed in the circumferential direction and the axial length direction of the cutter roll 61.
- the cutting blade 64 is a cutting blade for forming the rear slit 45, and a plurality of cutting blades 64 are formed at intervals in the circumferential direction of the cutter roll 61.
- the cutter roll 61 and the anvil roll 62 are arranged so that their axial centers 61 'and 62' are parallel to each other. A clearance is provided between the cutter roll 61 and the anvil roll 62, or both rolls are in contact with each other.
- the cutting blades 63 and 64 positioned on the peripheral surface of the cutter roll 61 are formed and arranged so as to coincide with the shape and arrangement of the slits 43 and 45 formed in the target absorbent body 4.
- An absorber precursor 4a (hereinafter also referred to as “precursor 4a” for the sake of simplicity), which is a precursor of an absorbent body having a laminated structure of a main body absorbent sheet and a central absorbent sheet, is shown by an arrow R in FIG. And is supplied between the cutter roll 61 and the anvil roll 62 in the cutting device 60.
- the state of the cross section in the thickness direction of the precursor 4a before being supplied between the two rolls 61 and 62 is shown in a circle indicated by I in FIG. In the precursor 4a before being supplied between the two rolls 61 and 62, the absorbent sheets 401 and 402 are not joined.
- the cutting blade 63 provided on the peripheral surface of the cutter roll 61 by the sandwiching pressure by the both rolls 61 and 62 extends along the thickness direction of the precursor 4a. Proceeds into the precursor 4a. Thereby, the vertical slit 43 and the back slit 45 are formed in the precursor 4a.
- the state of the cross section in the thickness direction of the precursor 4a after the vertical slit 43 is formed is shown in a circle indicated by II in FIG.
- the respective absorbent sheets 401 and 402 are consolidated due to the progress of the cutting blade 63, so that the absorbent sheets 401 and 402 (absorption absorbed) stacked around the vertical slit 43.
- a pressure-bonding portion 43a (squeezed portion) between the layers is formed.
- a crimping part 43a (pressing part) in which the laminated absorbent sheets 401 and 402 (absorbing layers) are crimped is also formed around the rear slit 45.
- surroundings may have the crimping
- FIG. 4 shows an enlarged cross-sectional view of the tip portion of the cutting blade 63 provided in the cutter roll 61.
- the left-right direction of the paper surface in the figure coincides with the axial direction of the cutter roll 61.
- the direction orthogonal to the paper surface in the figure is a direction parallel to the conveyance direction of the precursor 4a.
- the cutting blade 63 has its tip angle changed in two stages. Specifically, the cutting blade 63 forms a first tip angle ⁇ 1 by two hypotenuses L1, L1 at the most tip position. Further, the cutting blade 63 is at a position slightly closer to the base from the position of the most distal end (above the cutting blade 63 in FIG.
- the first tip angle ⁇ 1 is larger than the second tip angle ⁇ 2.
- the first tip angle ⁇ 1 is preferably 40 degrees or more, particularly 60 degrees or more, and preferably 100 degrees or less, particularly 90 degrees or less.
- the first tip angle ⁇ 1 is preferably 40 degrees or more and 100 degrees or less, and particularly preferably 60 degrees or more and 90 degrees or less.
- the second tip angle ⁇ 2 is smaller than the first tip angle ⁇ 1, it is preferably 30 degrees or more, particularly 50 degrees or more, and preferably 90 degrees or less, particularly 70 degrees or less.
- the second tip angle ⁇ 2 is preferably 30 degrees or greater and 90 degrees or less, and particularly preferably 50 degrees or greater and 70 degrees or less.
- the absorber precursor 4 ′ in which the slits 43 and 45 are formed in the slit forming process (hereinafter, also referred to as “precursor with slit 4 ′” for the sake of simplicity).
- the softening process is performed using the softening means 70 including one roll 71 (winding portion).
- the 1st roll 71 is a winding part which can wind the precursor 4 'with a slit.
- “winding” means that the precursor 4 ′ with slit is not in contact with the first roll 71 at a point when viewed from the axial direction of the first roll 71, but on the peripheral surface of the first roll 71. A state of contact along the line. That is, it means that the precursor 4 ′ with slit is conveyed to the first roll 71 while having a certain holding angle.
- the softening means 70 in the present embodiment includes, in addition to the first roll 71, a second roll 72 disposed on the upstream side in the conveying direction of the precursor 4 ′ with slit. And a third roll 73 disposed on the downstream side in the transport direction.
- the first to third rolls 71 to 73 are arranged such that their axis centers 71 ′, 72 ′, and 73 ′ are parallel to each other. Further, a clearance is provided between the first roll 71 and the second roll 72, and a clearance is also provided between the second roll 72 and the third roll 73.
- Each of the first to third rolls is a flat roll having a flat surface.
- the first roll 71 is disposed so that a part of the first roll 71 enters the space between the second roll 72 and the third roll 73, and more specifically, the lower half of the roll 71. Has entered.
- transformed into circular arc shape other than a roll are mentioned.
- the slitted precursor 4 ′ to be softened by the softening means 70 is transported by a known transport means (not shown) such as a belt conveyor, and as shown in FIG. After being introduced onto the circumferential surface of the first roll 71 and then onto the circumferential surface of the third roll 73, the circumferential surface of the third roll 73. Then, it is transferred to a known conveying means (not shown) such as a belt conveyor and further conveyed downstream. As shown in FIG. 5, the slit-attached precursor 4 ′ is deformed into a circular arc shape that is convex toward the first surface “a” on the peripheral surface of the second roll 72.
- the slitted precursor 4 ′ passes through the first to third rolls 71 to 73 while being deformed into a shape along the peripheral surfaces of the first to third rolls 71 to 73.
- the first to third rolls 71 to 73 themselves may be drive rolls provided with drive means (not shown) such as a servo motor, or may be free rolls that do not have drive. good.
- a drive roll (not shown) is provided in the immediate vicinity of the downstream side of the third roll 73 so that the transportability of the slitted precursor 4 ′ is not impaired by the winding by the first to third rolls 71 to 73.
- a circle indicated by III represents the state of the cross section in the thickness direction of the absorbent body 4 after the flexible processing by the first to third rolls 71 to 73.
- the precursor 4 ′ with slit is conveyed while being sequentially deformed into shapes along the peripheral surfaces of the second roll 72, the first roll 73, and the third roll 73.
- the absorbent sheets 401 and 402 (absorbing layers) that have been bonded to each other are peeled off and separated, and the absorbent sheets 401 and 402 return to the non-bonded state before the slit is formed.
- the continuous body 4 of the target absorbent body in which the crimping part 43a (pressing part) formed around the slits 43 and 45 is softened can be successfully obtained.
- the continuous body 4 of the absorbent body is cut to the size of the absorbent body of the individual absorbent article by a known cutting means to become the absorbent body 4 having the dimensions of the absorbent body of the sanitary napkin 1 described above.
- the first surface a is a surface located on the cutter roll 61 side during slit formation
- the second surface b is a surface located on the anvil roll 62 side during slit formation. is there.
- the winding portion of the bending means used in the present invention may be such that, as with the first roll 71, the precursor 4 ′ with slit is curved toward the first surface a side, and the second and second 3, the slit precursor 4 ′ may be curved to the second surface b side, but the bending means used in the present invention is the slit precursor 4 ′.
- a roll (winding portion) that is bent toward the first surface a side and a roll (winding portion) that is bent toward the second surface b side and the bending processing means 70 used in this embodiment.
- a total of three rolls that is, two rolls (winding portions) that bend the precursor 4 ′ with slits to the one surface a side and one roll (winding portion) that bends to the other surface b side. More preferably, the above rolls are provided.
- the precursor 4 ′ with slit in the portion delivered from the second roll 72 to the first roll 71, has a cross-sectional shape along the transport direction R. Even in a portion that is bent so as to form an S shape and is transferred from the first roll 71 to the third roll 73, the cross-sectional shape of the precursor 4 ′ with slits along the transport direction R is S. It is bent to form a letter shape.
- the slit precursor 4 ′ is preferably bent so that a length of 100 cm or less in the conveying direction forms an S shape in a portion that is transferred from roll to roll. Note that the S-shape referred to in this specification includes an inverted S-shape in which left and right are reversed.
- the holding angle ⁇ 11 of the first roll 71 having the largest holding angle of the precursor 4 ′ with slit is preferably 10 degrees or more, more preferably 40 degrees or more. Also, it is preferably 180 degrees or less, more preferably 90 degrees or less, and preferably 10 degrees or more and 180 degrees or less, more preferably 40 degrees or more and 90 degrees or less.
- the holding angle of the precursor 4 ′ with slit in the first roll 71 is the cross section obtained by cutting the first roll 71 and the precursor 4 ′ with slit in a plane orthogonal to the axis 71 ′ of the roll.
- the radius of the first roll 71 is preferably 10 mm or more, more preferably 15 mm or more, preferably 50 mm or less, more preferably 20 mm or less, and preferably 10 mm or more and 50 mm or less, more preferably It is 15 mm or more and 20 mm or less.
- Each of the second roll 72 and the third roll 73 has a holding angle ⁇ 12, ⁇ 13 of the precursor 4 ′ with a slit of preferably 10 degrees or more, more preferably 20 degrees or more, and preferably 180 degrees. Hereinafter, it is more preferably 45 degrees or less, preferably 10 degrees or more and 180 degrees or less, more preferably 20 degrees or more and 45 degrees or less.
- the second roll 71 and the third roll 73 each have a radius of preferably 10 mm or more, more preferably 15 mm or more, and preferably 50 mm or less, more preferably 20 mm or less. Is from 10 mm to 50 mm, more preferably from 15 mm to 20 mm.
- the first to third rolls 71 to 73 have a radius of at least one roll in the conveying direction of the slit-formed precursor 4 ′ from the viewpoint of softening the compressed portion around the slit 43.
- the radius of two or more rolls is preferably 4 times or less of the length of the slit 43, and the radius of all the rolls is less than 4 times the length of the slit 43.
- the length is preferably 4 times or less of the length.
- the length of the slit here is the total length in the longitudinal direction of the slit when the slit is formed in parallel with the transport direction like the slit 43 shown in FIG. 3, and the slit is parallel to the transport direction. If it is not formed, the length in the conveyance direction between the front edge and the rear edge of the slit in the conveyance direction is set.
- the slit to be softened in the softening step has a length in the transport direction defined as described above of preferably 2 mm or more, more preferably 5 mm or more, and preferably 100 mm or less, more preferably 50 mm or less, Further, it is preferably 2 mm or more and 100 mm or less, more preferably 5 mm or more and 50 mm or less. Note that the radius of curvature when the winding portion is a cylindrical roll is the same as the radius of the roll.
- the winding portion is not a roll
- the winding portion is a portion of the belt conveyor that is bent by the roll and deformed into a cross-section arc shape
- the belt deformed into the cross-section arc shape it is preferable that the curvature radius of is 4 times or less the length in the conveyance direction of the precursor 4 ′ with slit.
- the softening process in the present invention can provide a further excellent softening effect for the slits formed in a straight line extending in the transport direction.
- FIG. 6 is a diagram showing another embodiment of the present invention.
- the cutter roll 81 having the cutting blade 83 is formed after the slit precursor 4 ′ is formed from the absorber precursor 4 ⁇ / b> A using the cutting device 60 having the same configuration as the cutting device 60 described above.
- an anvil roll 82 that receives the cutter blade 83 of the cutter roll, the slit-cured precursor 4 'is cut into the size of each absorber 4 and the single-wafer slit-cured precursor 4 is cut.
- the first bend processing means 70A provided with a transfer roll 75 (winding portion) provided with a suction hole on the outer peripheral surface thereof is used for the single-wafer slit precursor 4 ′.
- the transfer roll 75 is separated from the outer peripheral surface in a range P3 from a position in front of the receiving portion P1 of the sheet precursor 4 ′ with slit to a position exceeding the delivery portion P2 to the belt conveyor 79. Suction is possible.
- the sheet-shaped slit precursor 4 ′ is deformed into a shape along the peripheral surface of the transfer roll 75 while performing suction from the outer peripheral surface. Also with the precursor 4 ′, it is possible to efficiently soften the pressure-bonding portion 43a (squeezing portion) around the slit while preventing the precursor 4 ′ with slit from lifting from the outer peripheral surface of the roll.
- the continuous sheet 76 having a strip shape is joined to the sheet-formed precursor 4 ′, and then the continuous sheet 76.
- a second softening process is performed using the second bending means 70B on the laminated body 77 composed of the sheet-shaped precursor 4 ′ with slits intermittently arranged on one side of the continuous sheet 76. ing.
- the second bending means 70B has the same configuration as the bending means 70 described above, except that the first roll 71A includes a suction mechanism. A plurality of suction holes are opened on the peripheral surface of the first roll 71A, and portions other than the opening are flat.
- the first roll 71A has an intake passage that communicates the opening on the circumferential surface with the opening provided on the side surface, and the opening provided on the side surface and an arcuate suction device disposed opposite to the side surface While the two are overlapped, suction from the peripheral surface is performed. Also in the second softening step by the second bending means 70B, the laminated body 77 is shaped along the peripheral surface of the first roll 71A while performing suction from the peripheral surface of the first roll 71A. By deforming to the above, it is possible to efficiently soften the pressure-bonding portion 43a (pressing portion) around the slit in the single-sheet precursor 4 ′ with slit included in the laminate 77.
- the slitting precursor 4 ′ is subjected to the softening step by the front end and the rear end in the conveying direction R of the sheet precursor 4 ′ with slits, and the cutting blade 64.
- the attached rear slit 45 has an advantage of suppressing processing defects such as phase shift, bending, and kinking due to being caught by the second bending processing means 70B.
- the suction range P4 of the first roll 71A is the same as the contact range of the precursor 4 ′ with slit, and it is possible to suck and hold only while the laminated body 77 is bent on the first roll 71A. This is preferable from the viewpoint of preventing the attached precursor 4 'from being lifted.
- belt-shaped continuous sheet 76 the sheet
- belt-shaped original fabric of the surface sheet which consists of a nonwoven fabric which has air permeability can be used.
- the top sheet 2 and the back sheet 3 various materials conventionally used in the technical field can be used without any particular limitation.
- the surface sheet 2 for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used.
- a liquid-impermeable material or a water-repellent material can be used.
- the liquid-impermeable material a resin film, a resin film having fine pores and moisture permeability, a laminate material of a resin film and a nonwoven fabric, and the like can be used.
- a superabsorbent polymer is sprayed on wet paper or nonwoven fabric, and the paper or nonwoven fabric is superimposed thereon, and then dried and integrated.
- an absorbent sheet for example, an absorbent sheet described in JP-A-8-246395 can be used.
- This absorbent sheet can be cut into a predetermined shape and used as a sheet-like absorber.
- the thickness per absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, particularly preferably 0.3 mm or more and 1.5 mm or less.
- the napkin 1 may not have the wing part 7.
- you may have a back flap part which spreads and fixes to the inner surface of shorts in the both sides in the back part of the absorptive main body 5.
- FIG. Further, only the longitudinal slit 43 may be formed in the absorber without forming the rear slit 45. Moreover, in the manufacturing method of the absorber shown in FIG.
- the 1st softening process using the transfer roll 75 may be abbreviate
- the second softening step may be omitted.
- a slit inclined with respect to both the transport direction and the direction perpendicular thereto may be formed.
- the absorber manufactured does not have the multilayer part 42, but the lamination
- the number of laminated absorbent sheets in the multilayer portion 42 in the case where the multilayer portion 42 is provided is not limited to the number shown in FIG. 2, and the difference in the number of laminated absorbent sheets between the multilayer portion 42 and other portions is also illustrated. It is not limited to the number shown in 2.
- the main body absorbent sheet 401 and the central absorbent sheet 402 constituting the absorbent body 4 are each folded to form a laminated structure composed of a plurality of layers.
- a laminate of a plurality of absorbent sheets may be used.
- the absorbent sheet can be folded in various ways.
- the auxiliary absorbent body 41 has the central absorbent sheet 402 folded as shown in FIGS. 8 (a) to 8 (d). It may be folded.
- the absorbent body to be manufactured in the present invention is not limited to such a form, and may be another form, for example, a pile pile of pulp fibers and a water-absorbing polymer. In this case, by passing through the first and / or second softening step, the pulp fibers in the crimping portion 43 are peeled apart and separated, and the distance between the pulp fibers is widened to obtain the effect of softening. .
- this invention absorbs absorbers, such as a disposable diaper, an incontinence pad, a panty liner, etc. of other absorbent articles. The same applies to the manufacture of the body.
- This invention discloses the manufacturing method and manufacturing apparatus of the following absorber further regarding embodiment mentioned above.
- ⁇ 1> While conveying the absorber precursor in one direction, making a cut in the thickness direction of the absorber precursor, and manufacturing a absorber having a slit, The absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor.
- the manufacturing method of an absorber which comprises the softening process which softens the said crimping
- the absorber has a laminated structure having a plurality of absorption layers, In the slit forming step, as the pressure-bonding portion, a pressure-bonding portion in which a plurality of absorption layers are pressure-bonded is formed.
- the softening step at least one absorption layer in the pressure-bonding portion is separated, and the pressure-bonding portion.
- the bending means includes at least one roll as the winding portion, and the holding angle of the absorber precursor in which the slit is formed is 10 degrees or more and 180 degrees or less.
- the winding portion has a plurality of suction holes on the surface, and deforms the absorber precursor in which the slit is formed while being held on the surface by suction. ⁇ 1> to ⁇ 3> The manufacturing method of the absorber of description.
- the bending means includes a plurality of the winding portions and bends the absorber precursor in which the slit is formed into an S-shaped cross section.
- the absorber precursor or the absorber has a multilayer portion at a portion disposed in the excretory portion facing portion of the absorbent article, and the multilayer portion is the number of laminated absorbent sheets constituting the absorber.
- the multilayer portion is thicker than the portion located around it, and forms a raised portion that protrudes toward the topsheet side of the absorbent article at a portion disposed in the excretory part facing portion of the absorbent article.
- ⁇ 8> The method for producing an absorbent body according to any one of ⁇ 1> to ⁇ 7>, wherein the absorbent body is composed only of a laminated structure of absorbent sheets.
- the absorber precursor or the absorber is composed of an absorbent sheet having a single layer or a multilayer structure, and the absorbent sheet sprays a superabsorbent polymer on wet paper or non-woven fabric, on which paper
- ⁇ 11> In the absorbent body precursor or the absorbent body, a plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in a dispersed state at a portion disposed in the excretory part facing portion of the absorbent article. ⁇ 1>- ⁇ 10> The manufacturing method of the absorber as described in any one of ⁇ 10>. ⁇ 12> In the absorbent body precursor or the absorbent body, longitudinal slits along the longitudinal direction X of the absorbent article are formed in a state dispersed in both the longitudinal direction X and the transverse direction Y of the absorbent article, ⁇ 1> to ⁇ 10 The manufacturing method of the absorber of any one of>.
- a longitudinal slit along the longitudinal direction X of the absorbent article is formed by cutting the absorber precursor in the thickness direction, and the longitudinal slit penetrates the laminated structure of the absorbent sheet constituting the absorber.
- a plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in the absorber precursor or the absorber, each longitudinal slit is individually independent, and between adjacent longitudinal slits
- the absorbent body has a plurality of rear slits extending in the rear part located behind the excretory part facing part of the absorbent article so as to have a longitudinal direction in a direction intersecting the longitudinal direction of the absorbent article.
- the rear slit has a shape in plan view in which the position of the central portion in the longitudinal direction of the slit is located closer to the front portion side of the absorbent article than the positions of both end portions in the longitudinal direction, preferably the front portion side
- the manufacturing method of the absorber as described in ⁇ 15> which has the shape of planar view curved convex toward the surface.
- the said back slit is a manufacturing method of the absorber as described in ⁇ 15> or ⁇ 16> currently formed in multiple numbers at intervals in the longitudinal direction X of an absorbent article.
- the cutting blade has a first tip angle ⁇ 1 formed by two hypotenuses L1, L1 at the most tip position, and is connected to each hypotenuse L1 at a position slightly closer to the base from the tip end position.
- ⁇ 1> to ⁇ 16> which has a second tip angle ⁇ 2 formed by the hypotenuses L2 and L2, and the first tip angle ⁇ 1 is larger than the second tip angle ⁇ 2.
- the first tip angle ⁇ 1 is preferably 40 ° or more, particularly preferably 60 ° or more, and is preferably 100 ° or less, particularly preferably 90 ° or less, and the first tip angle ⁇ 1 is 40 ° or more and 100 ° or less,
- the second tip angle ⁇ 2 is preferably 30 ° or more, particularly 50 ° or more, preferably 90 ° or less, particularly preferably 70 ° or less, provided that the second tip angle ⁇ 2 is smaller than the first tip angle ⁇ 1.
- the surface located on the cutter roll side at the time of slit formation is the first surface a
- the surface located on the anvil roll side at the time of slit formation is the second.
- the bending means includes, as the winding portion, a roll that curves the precursor with slit to the first surface a side, or a roll that curves the second surface b side, Alternatively, the method for producing an absorbent body according to any one of ⁇ 1> to ⁇ 20>, comprising both a roll that is bent toward the first surface a and a roll that is bent toward the second surface b.
- the precursor with slit which is the absorber precursor forming the slit
- the surface located on the cutter roll side at the time of slit formation is the first surface a
- the surface located on the anvil roll side at the time of slit formation is the second.
- the bending processing means causes the precursor with a slit to bend to one surface side of the first surface a and the second surface b and to bend to the other surface side 1
- ⁇ 23> The method for producing an absorbent body according to any one of ⁇ 1> to ⁇ 22>, wherein the slit has a length in the transport direction of the absorbent body precursor of 2 mm to 100 mm.
- ⁇ 24> The method for manufacturing an absorbent body according to any one of ⁇ 1> to ⁇ 23>, wherein a radius of curvature of the winding portion is not more than four times the length of the slit in the transport direction of the absorbent body precursor.
- ⁇ 25> The absorber according to any one of ⁇ 1> to ⁇ 24>, wherein an inter-axis distance of each roll of the winding portion is not more than four times the length of the slit in the transport direction of the absorber precursor. Manufacturing method.
- ⁇ 26> The method for producing an absorbent body according to any one of ⁇ 1> to ⁇ 25>, wherein the absorbent body is an absorbent body of an absorbent article.
- the absorbent article is a sanitary napkin, a disposable diaper, an incontinence pad, or a panty liner.
- the said slit is not formed in the surface sheet and back surface sheet of an absorbent article which are distribute
- a method for producing an absorbent article comprising a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body, A method for producing an absorbent article, wherein the absorbent body is produced by the method according to any one of ⁇ 1> to ⁇ 28>.
- Example 1 Using the following absorbent sheet (absorbing layer) as the absorbent sheets 401 and 402, a strip-shaped absorber precursor 4a having a cross-sectional structure shown in FIGS. 1 and 2 was produced.
- the strip-shaped absorber precursor 4a was subjected to the formation of the vertical slits 43 and the softening process for the precursor with slits using the apparatus shown in FIGS. 3 and 5 to obtain an absorber with slits.
- the diameters of the first to third rolls were all 37 mm, and the arrangement was as shown in Table 1 and FIG.
- the length of the linear slit 43 extending in the conveying direction of the precursor with slit was 20 mm, and was a length corresponding to 1.08 times the radius (curvature radius) of each roll.
- Absorbent sheet Cross-linked cellulose fiber, softwood pulp, and superabsorbent polymer supplied in an air stream were deposited at a weight ratio of 5: 2: 3, and then solidified with PVA (2.4% by weight) as an adhesive A dry sheet was used.
- the main body absorbent sheet 401 has a basis weight of 75 g / m 2 and a thickness of 0.45 mm
- the central absorbent sheet 402 has a basis weight of 80 g / m 2 and a thickness of 0.50 mm.
- the basis weight was measured according to the method described in JIS-P8124, and the thickness was measured according to JIS-P8118: 1998.
- Example 2 the thickness was measured using a peacock-made desk thickness gauge, and a thickness of 2.5 cm / cm 2 was measured by placing a 5 cm ⁇ 5 cm measuring plate.
- Example 4 the arrangement of the first to third rolls was changed.
- Example 4 the arrangement of the first to third rolls and the introduction position of the absorber precursor 4a to the first roll were changed. Except that, an absorber with a slit was obtained in the same manner as in Example 1.
- Example 2 is shown in Table 1 and FIG. 8B
- Example 3 is shown in Table 1 and FIG. 8C
- Example 4 is shown in FIG. 1 and as shown in FIG.
- the obtained absorbent body with a slit is placed on the support table of the handometer so that the longitudinal center of the multilayer portion of the absorbent body is located at the center of the concave groove, and the absorbent body in the width direction.
- the bending stiffness when bent was evaluated.
- an absorber having a flexible slit can be efficiently manufactured.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
A method for producing an absorbent body (4) having slits (43, 45) as a result of having an absorbent body precursor (4a) being conveyed in a direction (R) and cuts being inserted in the thickness direction. The method has a step in which the absorbent body precursor (4a) is pressed between a cutter roll (61) having cutting blades (63, 64) on the peripheral surface thereof and an anvil roll (62), and slits (43, 45) are formed. A compressed section that sometimes forms around the slits is made flexible by winding and deforming the absorbent body precursor (4') having the slits (43, 45) formed therein on to a winding section (71) of a bending means (70).
Description
本発明は、吸収性物品に用いられる吸収体の製造方法に関する。
This invention relates to the manufacturing method of the absorber used for an absorbent article.
生理用ナプキンやパンティライナ、使い捨ておむつ等の吸収性物品に用いられる吸収体に、細幅のスリットないし溝を設け、該吸収性物品の各種の性能を向上させる技術が知られている。例えば特許文献1には、吸収体面に、裏面に貫通する多数の貫通穴を形成した吸収体が記載されている。この吸収体は、ロール表面に多数の突起を有する穴加工ロールと、突起に対応する位置に凹部を有するアンビルロールとを対向配置し、両ロールの間に吸収体を通過させることにより、吸収体面に貫通穴を形成することで製造される。
A technique is known in which narrow slits or grooves are provided in an absorbent body used for absorbent articles such as sanitary napkins, panty liners, and disposable diapers to improve various performances of the absorbent article. For example, Patent Document 1 describes an absorber in which a large number of through holes penetrating the back surface are formed on the absorber surface. The absorber surface is formed by disposing a hole forming roll having a large number of protrusions on the roll surface and an anvil roll having a recess at a position corresponding to the protrusions, and allowing the absorber to pass between both rolls. It is manufactured by forming a through-hole.
特許文献2には、製品の短手方向の中央領域において、吸収体側に固定され、配置方向に関して収縮する力を付与する弾性体と、弾性体の収縮作用が働く領域の近傍において、吸収体に形成されたスリットとを有する吸収性製品が記載されている。このスリットは、ローラの外周に互いに平行に配置された刃が設けられているローラカッターを用いたり、あるいはローラの外周に互いに接近,離間するように非平行に配置された刃が設けられているローラカッターを用いたりすることで形成される。
In Patent Document 2, an elastic body that is fixed to the absorber side in the central region in the short direction of the product and applies a contracting force with respect to the arrangement direction, and an absorber in the vicinity of a region where the contracting action of the elastic body works. Absorbent products having slits formed are described. This slit uses a roller cutter provided with blades arranged parallel to each other on the outer periphery of the roller, or is provided with blades arranged non-parallel so as to approach and separate from each other on the outer periphery of the roller. It is formed by using a roller cutter.
本発明は、吸収体前駆体を一方向に向けて搬送させながら、該吸収体前駆体の厚み方向に向けて切り込みを入れて、スリットを有する吸収体を製造する方法である。周面に切断刃を有するカッターロールと、該カッターロールの該切断刃を受けるアンビルロールとで吸収体前駆体を挟圧し、該切断刃を該吸収体前駆体の厚み方向に沿って該吸収体前駆体内に進行させることにより、該吸収体前駆体に周囲に圧搾部を有するスリットを形成するスリット形成工程と、前記スリットを形成した吸収体前駆体を、屈曲加工手段の巻き掛け部に巻き掛けて変形させることにより前記圧搾部を柔軟化させる柔軟化工程とを具備する。
The present invention is a method for producing an absorber having a slit by making an incision in the thickness direction of the absorber precursor while conveying the absorber precursor in one direction. The absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor. A slit forming step of forming a slit having a squeezed portion around the absorber precursor by being advanced into the precursor, and the absorber precursor having the slit formed thereon is wound around a winding portion of a bending means. And a softening step of softening the compressed portion by deforming.
本発明者らは、上述した従来技術のように、周面に切断刃を有するカッターロールと、カッターロールの切断刃を受けるアンビルロールとを有するスリット加工装置を用いて、吸収体にスリットを押し切りで形成する場合、切断刃の幅を、その耐久性等の観点等から広めにすると、スリットの周囲に圧搾した部分が形成されやすいことを知見した。吸収体のスリットの周囲に、このような圧搾部分が存在すると、スリットの周囲の剛性が増加し、吸収体にスリットを設けたことによる利点が十分に発揮されない場合がある。
As in the prior art described above, the present inventors use a slitting device having a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll to push the slit into the absorber. It was found that when the width of the cutting blade is widened from the viewpoint of durability or the like, a compressed portion is easily formed around the slit. If such a compressed portion exists around the slit of the absorbent body, the rigidity around the slit increases, and the advantages of providing the slit in the absorbent body may not be fully exhibited.
したがって本発明の課題は、前述した従来技術が有する欠点を解消し得る吸収体の製造方法及び製造装置に関する。
Therefore, an object of the present invention relates to an absorber manufacturing method and a manufacturing apparatus that can eliminate the above-described drawbacks of the prior art.
以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。まず、本発明によって製造される吸収体を有する吸収性物品の一例である生理用ナプキンについて説明する。図1及び図2に示すように、生理用ナプキン1は、液保持性の吸収体4並びに該吸収体4の肌対向面側に配置された表面シート2及び該吸収体4の非肌対向面側に配置された裏面シート3を具備する吸収性本体5を備え、着用者の前後方向に相当する縦方向Xとこれに直交する横方向Yとを有する。
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. First, the sanitary napkin which is an example of the absorbent article which has the absorber manufactured by this invention is demonstrated. As shown in FIGS. 1 and 2, the sanitary napkin 1 includes a liquid-retaining absorbent body 4, a surface sheet 2 disposed on the skin facing surface side of the absorbent body 4, and a non-skin facing surface of the absorbent body 4. It has an absorptive main body 5 having a back sheet 3 disposed on the side, and has a longitudinal direction X corresponding to the wearer's front-rear direction and a lateral direction Y orthogonal thereto.
なお、本明細書において、肌対向面は、吸収性物品又はその構成部材(例えば吸収性本体5)における、吸収性物品の着用時に着用者の肌側に向けられる面であり、非肌対向面は、吸収性物品又はその構成部材における、吸収性物品の着用時に肌側とは反対側(着衣側)に向けられる面である。また、縦方向Xは、吸収性物品(吸収性本体、吸収体)の長手方向に一致し、横方向Yは、吸収性物品(吸収性本体、吸収体)の幅方向(長手方向に直交する方向)に一致する。
In addition, in this specification, a skin opposing surface is a surface which faces a wearer's skin side at the time of wear of an absorbent article in an absorbent article or its structural member (for example, absorbent main body 5), and is a non-skin opposing surface Is the surface of the absorbent article or its component that is directed to the side opposite to the skin side (clothing side) when the absorbent article is worn. Further, the longitudinal direction X coincides with the longitudinal direction of the absorbent article (absorbent body, absorbent body), and the lateral direction Y is perpendicular to the width direction (longitudinal direction) of the absorbent article (absorbent body, absorbent body). Direction).
吸収性本体5は、着用時に着用者の液***部(膣口等)に対向配置される***部対向部Bと、着用時に***部対向部Bよりも着用者の腹側(前側)に配される前方部Aと、着用時に***部対向部Bよりも着用者の背側(後側)に配される後方部Cとを縦方向Xに有している。
ナプキン1は、吸収性本体5に加えて更に、吸収性本体5における***部対向部Bの縦方向Xに沿う両側部それぞれから横方向Yの外方に延出する一対のウイング部7,7を有している。 The absorptivemain body 5 is disposed on the abdomen (front side) of the wearer relative to the excretion part facing part B disposed opposite to the wearer's liquid excretion part (such as the vaginal opening) when worn and the excretion part facing part B when worn. The front portion A and the rear portion C arranged on the back side (rear side) of the wearer rather than the excretory portion facing portion B at the time of wearing are provided in the vertical direction X.
In addition to the absorbentmain body 5, the napkin 1 further includes a pair of wing portions 7, 7 extending outward in the lateral direction Y from both side portions along the vertical direction X of the excretory portion facing portion B of the absorbent main body 5. have.
ナプキン1は、吸収性本体5に加えて更に、吸収性本体5における***部対向部Bの縦方向Xに沿う両側部それぞれから横方向Yの外方に延出する一対のウイング部7,7を有している。 The absorptive
In addition to the absorbent
図2に示すように、表面シート2は、吸収体4の肌対向面の全域を被覆し、更に吸収体4の縦方向Xに沿う両側縁から横方向Yの外方に延出している。一方、裏面シート3は、吸収体4の非肌対向面の全域を被覆し、更に吸収体4の縦方向Xに沿う両側縁から横方向Yの外方に延出して、後述するサイドシート10とともにサイドフラップ部6を形成している。裏面シート3とサイドシート10とは、吸収体4の縦方向Xに沿う両側縁からの延出部において、接着剤、ヒートシール、超音波シール等の公知の接合手段によって互いに接合されている。表面シート2及び裏面シート3それぞれと吸収体4との間は接着剤によって接合されていてもよい。
As shown in FIG. 2, the top sheet 2 covers the whole area of the skin-facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4. On the other hand, the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 to be described later. In addition, a side flap portion 6 is formed. The back sheet 3 and the side sheet 10 are joined to each other by known joining means such as an adhesive, heat seal, ultrasonic seal, and the like at the extended portions from both side edges along the longitudinal direction X of the absorber 4. The top sheet 2 and the back sheet 3 may be bonded to the absorber 4 with an adhesive.
吸収体4は、図2に示すように、本体吸収性シート401及び中央吸収性シート402が複数層積層されてなる積層構造を有し、図1及び図2に示すように、***部対向部Bに多層部42を有している。多層部42は、図2に示すように、吸収体4を構成する吸収性シート401,402の積層枚数が、その周囲に位置する部分より多い部分である。本実施形態における多層部42は、その周囲に位置する部分よりも厚みも厚く、***部対向部Bに、表面シート2側(ナプキン1の肌対向面側)に突出した***部を形成している。また、吸収体4は、吸収体4の外形を形成する主吸収体40と、主吸収体40の一部に重ねて配された主吸収体40より小型の補助吸収体41とを有している。補助吸収体41は、少なくとも***部対向部Bに位置している。
The absorbent body 4 has a laminated structure in which a main body absorbent sheet 401 and a central absorbent sheet 402 are laminated as shown in FIG. 2, and as shown in FIGS. B has a multilayer portion 42. As shown in FIG. 2, the multilayer part 42 is a part where the number of laminated absorbent sheets 401 and 402 constituting the absorbent body 4 is larger than the part located around the multilayered part 42. The multilayer part 42 in this embodiment is thicker than the part located in the circumference | surroundings, and forms the protruding part which protruded in the excretion part opposing part B to the surface sheet 2 side (skin opposing surface side of the napkin 1). Yes. The absorbent body 4 includes a main absorbent body 40 that forms the outer shape of the absorbent body 4, and an auxiliary absorbent body 41 that is smaller than the main absorbent body 40 that is arranged on a part of the main absorbent body 40. Yes. The auxiliary absorber 41 is located at least in the excretory part facing part B.
吸収体4は、吸収性シート401,402の積層構造のみから構成されていることが好ましく、該吸収体4は、厚みの薄さと、高吸収力、また折り加工の安定性や形状変形の自由度の点から、高吸収性ポリマーの粒子が繊維層間に保持された吸収性シートを用いることが好ましい。
The absorbent body 4 is preferably composed only of a laminated structure of absorbent sheets 401 and 402. The absorbent body 4 has a thin thickness, a high absorbent capacity, stability of folding processing, and freedom of shape deformation. From the point of view, it is preferable to use an absorbent sheet in which particles of a superabsorbent polymer are held between fiber layers.
主吸収体40は、パルプを含む本体吸収性シート401の折り畳み構造からなる。詳細には、主吸収体40は、本体吸収性シート401を、縦方向Xに沿って延びる折り線401a,401bの位置で内折りして形成されている。つまり本体吸収性シート401は、両端折りの折り畳み状態になっている。このとき、本体吸収性シート401のうち、内折りされた部位が互いに一部重なるように、折り線401a,401bの位置を調整する。したがって主吸収体40は、本体吸収性シート401からなる2層及び3層の積層構造になっている。
The main absorbent body 40 has a folded structure of a main body absorbent sheet 401 containing pulp. Specifically, the main absorbent body 40 is formed by folding the main body absorbent sheet 401 inwardly at positions of folding lines 401 a and 401 b extending along the vertical direction X. That is, the main body absorbent sheet 401 is folded at both ends. At this time, the positions of the folding lines 401a and 401b are adjusted so that the inwardly folded portions of the main body absorbent sheet 401 partially overlap each other. Therefore, the main absorbent body 40 has a laminated structure of two layers and three layers made of the main body absorbent sheet 401.
一方、補助吸収体41は、パルプを含む中央吸収性シート402の折り畳み構造からなる。詳細には、補助吸収体41は、中央吸収性シート402を、縦方向Xに沿って延びる折り線402aに沿って、該折り線402aよりも外方に位置する部位を内折りする。次に、折り線402bに沿って、該折り線402bよりも外方に位置する部位を、先に折られている部位の側に向けて内折りする。折り線402a及び402bは、中央吸収性シート402の横方向Yの長さを略三等分する位置に形成される。これによって中央吸収性シート402は、巻き三つ折りの折り畳み状態となる。したがって補助吸収体41は、中央吸収性シート402からなる3層の積層構造になっている。
On the other hand, the auxiliary absorbent body 41 has a folded structure of the central absorbent sheet 402 containing pulp. Specifically, the auxiliary absorbent body 41 folds the central absorbent sheet 402 inward along a fold line 402a extending along the longitudinal direction X at a portion located outward from the fold line 402a. Next, along the fold line 402b, the part located outward from the fold line 402b is folded inward toward the part that is folded first. The fold lines 402a and 402b are formed at positions that divide the length in the lateral direction Y of the central absorbent sheet 402 into approximately three equal parts. As a result, the central absorbent sheet 402 is in a folded state with three windings. Therefore, the auxiliary absorbent body 41 has a three-layer structure composed of the central absorbent sheet 402.
図2に示すとおり、巻き三つ折りの折り畳み状態となっている中央吸収性シート402は、両端折りの折り畳み状態になっている本体吸収性シート401の内部に配置されている。つまり、本体吸収性シート401と中央吸収性シート402とは、入れ子の折り畳み構造になっている。その結果、本体吸収性シート401と中央吸収性シート402との積層構造においては、中央吸収性シート402の周縁の少なくとも一部、具体的には該周縁の全域から外方に延出するように本体吸収性シート401が積層されている。なお、補助吸収体41は、上述のとおり***部対向部Bに位置しているので、該補助吸収体41を構成する中央吸収性シート402も***部対向部Bに位置していることになる。
多層部42においては5層、多層部42以外の部分においては3層に積層された吸収性シートの各層が、本発明における「吸収層」である。 As shown in FIG. 2, the centralabsorbent sheet 402 that is in a folded state with three windings is disposed inside the main body absorbent sheet 401 that is in a folded state with both ends folded. That is, the main body absorbent sheet 401 and the central absorbent sheet 402 have a nested folding structure. As a result, in the laminated structure of the main body absorbent sheet 401 and the central absorbent sheet 402, it extends outward from at least a part of the peripheral edge of the central absorbent sheet 402, specifically from the entire region of the peripheral edge. A main body absorbent sheet 401 is laminated. In addition, since the auxiliary | assistant absorber 41 is located in the excretion part opposing part B as above-mentioned, the center absorbent sheet 402 which comprises this auxiliary | assistant absorber 41 is also located in the excretion part opposing part B. .
Each layer of the absorbent sheet laminated in five layers in themultilayer portion 42 and three layers in the portions other than the multilayer portion 42 is an “absorbent layer” in the present invention.
多層部42においては5層、多層部42以外の部分においては3層に積層された吸収性シートの各層が、本発明における「吸収層」である。 As shown in FIG. 2, the central
Each layer of the absorbent sheet laminated in five layers in the
本体吸収性シート401の折り畳み構造からなる主吸収体40は、平面視において角が丸みを帯びた略矩形形状でかつ前方部Aから***部対向部Bを経て後方部Cにわたって延びている。一方、中央吸収性シート402の折り畳み構造からなる補助吸収体41は、平面視において略矩形形状であり、***部対向部Bからその近傍の後方部Cにわたって配されている。主吸収体40の一部に補助吸収体41を配することで、吸収体4の一部の吸収容量を容易かつ効率的に増大させることができる。補助吸収体41は、折り畳まれた本体吸収性シート401からなる主吸収体40の内部に配置するのに代えて、主吸収体40を構成する本体吸収性シート401の肌対向面側に積層してもよいし、非肌対向面側に積層してもよい。
The main absorbent body 40 having a folded structure of the main body absorbent sheet 401 has a substantially rectangular shape with rounded corners in plan view, and extends from the front part A to the rear part C via the excretory part facing part B. On the other hand, the auxiliary absorbent body 41 having a folded structure of the central absorbent sheet 402 has a substantially rectangular shape in plan view, and is arranged from the excretory part facing part B to the rear part C in the vicinity thereof. By arranging the auxiliary absorber 41 in a part of the main absorber 40, the absorption capacity of a part of the absorber 4 can be easily and efficiently increased. The auxiliary absorbent body 41 is laminated on the skin facing surface side of the main body absorbent sheet 401 constituting the main absorbent body 40, instead of being disposed inside the main absorbent body 40 composed of the folded main body absorbent sheet 401. Alternatively, it may be laminated on the non-skin facing surface side.
吸収性本体5の肌対向面(表面シート2の肌対向面)における縦方向Xに沿う両側部には、図2に示すように、平面視において吸収体4の縦方向Xに沿う左右両側部に重なるように、一対のサイドシート10,10が吸収性本体5の縦方向Xの略全長にわたって配されている。一対のサイドシート10,10は、それぞれ、***部対向部Bに位置する線状の第1接合線11と、該第1接合線11の縦方向Xの前後(前方部A及び後方部C)に位置する線状の第2接合線12とで吸収性本体5(表面シート2)に接合されている。第1接合線11は、平面視において横方向Yの外方に向けて凸の曲線状であり、第2接合線12は、平面視において縦方向に交差するように延びる線状(ジグザグ線状)である。サイドシート10は、撥水性の不織布からなる。このように、サイドシート10が接合線11,12にて吸収性本体5の肌対向面(表面シート2)に接合されていると、図2に示すように、接合線11,12よりも横方向Yの内方に、サイドシート10と表面シート2とで画成される空間部Pが形成される。この空間部Pは、吸収性本体5の横方向Yの中央に向けて開口しているので、横方向Yの中央から外方へ流れる経血等の***液は空間部Pに収容されるようになり、結果として***液の漏れが効果的に防止される。
On both sides along the vertical direction X of the skin facing surface of the absorbent main body 5 (skin facing surface of the topsheet 2), as shown in FIG. A pair of side sheets 10, 10 are arranged over substantially the entire length in the longitudinal direction X of the absorbent main body 5. The pair of side sheets 10 and 10 are each a linear first joining line 11 located in the excretory part facing part B, and the longitudinal direction X of the first joining line 11 (front part A and rear part C). It joins to the absorptive main body 5 (surface sheet 2) with the linear 2nd joining line 12 located in this. The first joining line 11 has a curved shape that protrudes outward in the lateral direction Y in plan view, and the second joining line 12 has a linear shape (zigzag line shape) that extends in the longitudinal direction in plan view. ). The side sheet 10 is made of a water-repellent nonwoven fabric. Thus, when the side sheet 10 is joined to the skin facing surface (surface sheet 2) of the absorbent main body 5 by the joining lines 11 and 12, as shown in FIG. A space P defined by the side sheet 10 and the top sheet 2 is formed inward in the direction Y. Since the space P is open toward the center in the lateral direction Y of the absorbent main body 5, excretion fluid such as menstrual blood flowing outward from the center in the lateral direction Y seems to be accommodated in the space P. As a result, the leakage of excretory fluid is effectively prevented.
サイドフラップ部6は、図1に示すように、***部対向部Bにおいて横方向Yの外方に向かって大きく張り出しており、これにより吸収性本体5の縦方向Xに沿う左右両側に、一対のウイング部7,7が延設されている。また、表面シート2及び裏面シート3は、図1に示すように、吸収体4の縦方向Xの前端及び後端それぞれから縦方向Xの外方に延出し、それらの延出部において、接着剤、ヒートシール、超音波シール等の公知の接合手段によって、互いに接合されてエンドシール部を形成している。
As shown in FIG. 1, the side flap portions 6 project greatly outward in the lateral direction Y at the excretory portion-facing portion B, whereby a pair of side flap portions 6 are provided on both the left and right sides along the longitudinal direction X of the absorbent main body 5. The wing portions 7, 7 are extended. Further, as shown in FIG. 1, the top sheet 2 and the back sheet 3 extend outward in the longitudinal direction X from the front end and the rear end in the longitudinal direction X of the absorbent body 4. The end seal portion is formed by bonding to each other by a known bonding means such as an agent, heat sealing, ultrasonic sealing or the like.
ウイング部7は、ショーツ等の着衣のクロッチ部の非肌対向面側に折り返されて用いられるものである。ウイング部7は、図1に示すように、平面視において、下底(上底よりも長い辺)が吸収性本体5の側部側に位置する略台形形状を有している。ウイング部7の非肌対向面には、該ウイング部7(ナプキン1)をショーツ等の着衣(図示せず)に固定するウイング部粘着部(図示せず)が形成されており、このウイング部粘着部によって、使用時に、着衣のクロッチ部の非肌対向面(外面)側に折り返されたウイング部7を、該クロッチ部に粘着固定できるようになされている。また、吸収性本体5の非肌対向面にも、吸収性本体5を、ショーツ等の着衣に固定するための本体粘着部(図示せず)が形成されている。なお、ナプキン1においては、吸収性本体5とウイング部7との境界線は、ウイング部7の縦方向Xの両付け根を結ぶ直線(図示せず)である。
The wing part 7 is used by being folded back to the non-skin facing surface side of the crotch part of clothes such as shorts. As shown in FIG. 1, the wing portion 7 has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is positioned on the side of the absorbent main body 5 in a plan view. On the non-skin facing surface of the wing part 7, a wing part adhesive part (not shown) for fixing the wing part 7 (napkin 1) to clothing (not shown) such as shorts is formed. The wing portion 7 that is folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhered and fixed to the crotch portion by the adhesive portion. Moreover, the main body adhesion part (not shown) for fixing the absorptive main body 5 to clothes, such as shorts, is also formed in the non-skin opposing surface of the absorptive main body 5. In the napkin 1, the boundary line between the absorbent main body 5 and the wing portion 7 is a straight line (not shown) that connects the roots in the longitudinal direction X of the wing portion 7.
図1及び図2に示すように、吸収性本体5の肌対向面(表面シート2の肌対向面)には、表面シート2及び吸収体4が裏面シート3側に向かって一体的に凹陥してなる線状溝が形成されており、該線状溝は、***部対向部Bにおいて縦方向Xに延びる縦溝51と、前方部A及び後方部Cにおいて、それぞれ横方向Yに延びるように形成された第1及び第2の横溝52,53とを含む。線状溝は、熱を伴うか又は伴わない圧搾加工(いわゆるエンボス加工)、あるいは超音波エンボス等のエンボス加工により常法に従って形成することができる。線状溝においては、表面シート2及び吸収体4との間が、図示しないが、接着剤を介して圧着されるか、あるいは熱融着等により一体化している。
As shown in FIG.1 and FIG.2, the surface sheet 2 and the absorber 4 are dented integrally on the skin opposing surface (skin opposing surface of the surface sheet 2) of the absorptive main body 5 toward the back surface sheet 3 side. The linear groove is formed so as to extend in the horizontal direction Y in the vertical groove 51 extending in the vertical direction X in the excretory part facing part B and in the front part A and the rear part C, respectively. The first and second lateral grooves 52 and 53 are formed. A linear groove | channel can be formed in accordance with a conventional method by embossing, such as a pressing process (what is called embossing) with or without heat (what is called embossing), or ultrasonic embossing. In the linear groove, the surface sheet 2 and the absorber 4 are not shown in the figure, but are bonded by an adhesive or integrated by thermal fusion or the like.
図1に示すように、吸収体4には、その***部対向部Bに、縦方向Xに沿う縦スリット43が複数、分散した状態に形成されている。縦スリット43は、縦方向X及び横方向Yの両方向に分散した状態に形成されている。縦スリット43は、図2に示すように、吸収体4をその厚み方向に向けて切り込むことで形成されており、吸収体4を構成する吸収性シート401,402の積層構造を貫通していることが好ましい。縦スリット43は、吸収体4の上下に配される表面シート2及び裏面シート3には、形成されていないことが好ましい。
As shown in FIG. 1, the absorbent body 4 is formed with a plurality of longitudinal slits 43 along the longitudinal direction X dispersed in the excretory part facing part B. The vertical slits 43 are formed in a state of being distributed in both the vertical direction X and the horizontal direction Y. As shown in FIG. 2, the vertical slit 43 is formed by cutting the absorber 4 in the thickness direction, and penetrates the laminated structure of the absorbent sheets 401 and 402 constituting the absorber 4. It is preferable. The vertical slits 43 are preferably not formed in the top sheet 2 and the back sheet 3 disposed above and below the absorber 4.
各縦スリット43は個々に独立しており、隣り合う縦スリット43どうしの間には非スリット部43’が位置している。そして、各縦スリット43は、その周囲の全域が非スリット部43’によって囲まれている。
Each vertical slit 43 is individually independent, and a non-slit portion 43 ′ is located between adjacent vertical slits 43. Each vertical slit 43 is surrounded by a non-slit portion 43 ′ around the entire periphery.
縦スリット43は、上述のとおり、吸収体4をその厚み方向にわたって切り込みを入れて形成されたものであり、実質的に幅を有していない切り込みから形成されているか、又は好ましくは1.5mm以下の細幅の空間となっている。縦スリット43が幅を有している場合、当該幅とは、縦スリット43の延びる方向と直交する方向における該縦スリット43の長さのことを言う。
As described above, the vertical slit 43 is formed by cutting the absorber 4 in the thickness direction, and is formed from a cut having substantially no width, or preferably 1.5 mm. It has the following narrow space. When the vertical slit 43 has a width, the width means the length of the vertical slit 43 in a direction orthogonal to the direction in which the vertical slit 43 extends.
吸収体4は、***部対向部Bより後方に位置する後方部Cに、ナプキン1の縦方向Xと交差する方向へ長手方向を有するように延びる複数本の後方スリット45を有する。この後方スリット45は、図1(b)に示すように、スリット45の長手方向の中央部45aの位置が、該長手方向の両端部45b,45bの位置よりも前方部A側に位置する平面視形状を有しており、より好ましくは、前方部A側に向かって凸に湾曲した平面視形状を有している。また、後方スリット45は、吸収性物品の縦方向Xに間隔を開けて複数本形成されている。
The absorbent body 4 has a plurality of rear slits 45 extending in the rear part C located behind the excretory part facing part B so as to have a longitudinal direction in a direction intersecting the longitudinal direction X of the napkin 1. As shown in FIG. 1B, the rear slit 45 is a plane in which the position of the central portion 45a in the longitudinal direction of the slit 45 is located on the front portion A side with respect to the positions of both end portions 45b and 45b in the longitudinal direction. It has a view shape, and more preferably has a plan view shape that is convexly curved toward the front portion A side. Moreover, the back slit 45 is formed in multiple numbers at intervals in the longitudinal direction X of the absorbent article.
図3には、上述した生理用ナプキン1における吸収体4の製造装置が模式的に示されている。本発明の好ましい実施態様においては、図3に示すように、切断装置60を用いたスリット形成工程、及び柔軟化手段70を用いた柔軟化工程を経て、上述した生理用ナプキン1の吸収体又はその連続体4を製造する。
スリット形成工程に用いる切断装置60は、切断刃63,64を周面に有するカッターロール61と、該カッターロール61の切断刃63,64を受けるアンビルロール62とを備えている。切断刃63は、縦スリット43を形成するための切断刃であり、カッターロール61の周方向及び軸長方向に分散させて複数形成されている。切断刃64は、後方スリット45を形成するための切断刃であり、カッターロール61の周方向に間隔を設けて複数形成されている。 FIG. 3 schematically shows an apparatus for manufacturing theabsorbent body 4 in the sanitary napkin 1 described above. In a preferred embodiment of the present invention, as shown in FIG. 3, the absorbent body of the sanitary napkin 1 described above or the slit forming step using the cutting device 60 and the softening step using the softening means 70 are used. The continuous body 4 is manufactured.
The cuttingdevice 60 used in the slit forming step includes a cutter roll 61 having cutting blades 63 and 64 on the peripheral surface, and an anvil roll 62 that receives the cutting blades 63 and 64 of the cutter roll 61. The cutting blades 63 are cutting blades for forming the vertical slits 43, and a plurality of cutting blades 63 are formed in the circumferential direction and the axial length direction of the cutter roll 61. The cutting blade 64 is a cutting blade for forming the rear slit 45, and a plurality of cutting blades 64 are formed at intervals in the circumferential direction of the cutter roll 61.
スリット形成工程に用いる切断装置60は、切断刃63,64を周面に有するカッターロール61と、該カッターロール61の切断刃63,64を受けるアンビルロール62とを備えている。切断刃63は、縦スリット43を形成するための切断刃であり、カッターロール61の周方向及び軸長方向に分散させて複数形成されている。切断刃64は、後方スリット45を形成するための切断刃であり、カッターロール61の周方向に間隔を設けて複数形成されている。 FIG. 3 schematically shows an apparatus for manufacturing the
The cutting
カッターロール61及びアンビルロール62は、それらの軸心61’,62’が平行になるように配置されている。カッターロール61とアンビルロール62との間にはクリアランスが設けられているか、又は両ロールは当接状態になっている。カッターロール61の周面に位置する切断刃63,64は、目的とする吸収体4に形成する各スリット43,45の形状や配置と一致するように形成・配置されている。
The cutter roll 61 and the anvil roll 62 are arranged so that their axial centers 61 'and 62' are parallel to each other. A clearance is provided between the cutter roll 61 and the anvil roll 62, or both rolls are in contact with each other. The cutting blades 63 and 64 positioned on the peripheral surface of the cutter roll 61 are formed and arranged so as to coincide with the shape and arrangement of the slits 43 and 45 formed in the target absorbent body 4.
本体吸収性シートと中央吸収性シートとの積層構造からなる吸収体の前駆体である吸収体前駆体4a(以下、簡便のため「前駆体4a」とも言う。)は、図3中、矢印Rで示される一方向に向けて搬送されて、切断装置60におけるカッターロール61とアンビルロール62との間に供給される。両ロール61,62の間に供給される前の前駆体4aの厚み方向の断面の状態が、図3中、Iで示す円内に表されている。両ロール61,62の間に供給される前の前駆体4aでは、各吸収性シート401,402の間は非接合状態になっている。
An absorber precursor 4a (hereinafter also referred to as “precursor 4a” for the sake of simplicity), which is a precursor of an absorbent body having a laminated structure of a main body absorbent sheet and a central absorbent sheet, is shown by an arrow R in FIG. And is supplied between the cutter roll 61 and the anvil roll 62 in the cutting device 60. The state of the cross section in the thickness direction of the precursor 4a before being supplied between the two rolls 61 and 62 is shown in a circle indicated by I in FIG. In the precursor 4a before being supplied between the two rolls 61 and 62, the absorbent sheets 401 and 402 are not joined.
両ロール61,62の間に前駆体4aが供給されると、両ロール61,62による挟圧によってカッターロール61の周面に設けられた切断刃63が前駆体4aの厚み方向に沿って該前駆体4a内に進行する。これにより、前駆体4aに縦スリット43及び後方スリット45が形成される。縦スリット43が形成された後の前駆体4aの厚み方向の断面の状態が、図3中、IIで示す円内に表されている。
スリット形成工程においては、各吸収性シート401,402が、切断刃63の進行に起因して圧密化されることによって、縦スリット43の周囲には、積層された吸収性シート401,402(吸収層間)間が圧着された圧着部43a(圧搾部)が形成される。同様に、後方スリット45の周囲にも、積層された吸収性シート401,402(吸収層間)間が圧着された圧着部43a(圧搾部)が形成される。「周囲に圧搾部を有するスリット」は、スリットの長手方向に沿う一対のスリット隣接部の一方又は双方のみに圧着部43a(圧搾部)を有していても良いし、スリットの全周に亘って圧着部43a(圧搾部)を有していても良い。 When theprecursor 4a is supplied between both the rolls 61 and 62, the cutting blade 63 provided on the peripheral surface of the cutter roll 61 by the sandwiching pressure by the both rolls 61 and 62 extends along the thickness direction of the precursor 4a. Proceeds into the precursor 4a. Thereby, the vertical slit 43 and the back slit 45 are formed in the precursor 4a. The state of the cross section in the thickness direction of the precursor 4a after the vertical slit 43 is formed is shown in a circle indicated by II in FIG.
In the slit forming step, the respective absorbent sheets 401 and 402 are consolidated due to the progress of the cutting blade 63, so that the absorbent sheets 401 and 402 (absorption absorbed) stacked around the vertical slit 43. A pressure-bonding portion 43a (squeezed portion) between the layers is formed. Similarly, a crimping part 43a (pressing part) in which the laminated absorbent sheets 401 and 402 (absorbing layers) are crimped is also formed around the rear slit 45. "The slit which has a pressing part in the circumference | surroundings" may have the crimping | compression-bonding part 43a (squeezing part) only in one or both of a pair of slit adjoining part along the longitudinal direction of a slit, and it covers the perimeter of a slit. And may have a crimping part 43a (squeezing part).
スリット形成工程においては、各吸収性シート401,402が、切断刃63の進行に起因して圧密化されることによって、縦スリット43の周囲には、積層された吸収性シート401,402(吸収層間)間が圧着された圧着部43a(圧搾部)が形成される。同様に、後方スリット45の周囲にも、積層された吸収性シート401,402(吸収層間)間が圧着された圧着部43a(圧搾部)が形成される。「周囲に圧搾部を有するスリット」は、スリットの長手方向に沿う一対のスリット隣接部の一方又は双方のみに圧着部43a(圧搾部)を有していても良いし、スリットの全周に亘って圧着部43a(圧搾部)を有していても良い。 When the
In the slit forming step, the respective
図4には、カッターロール61に備えられた切断刃63の先端部を拡大して示す断面図が示されている。同図における紙面の左右方向は、カッターロール61の軸心方向と一致する。また同図における紙面と直交する方向は、前駆体4aの搬送方向と平行な方向である。同図に示すとおり、切断刃63は、その先端角が2段階に変化している。具体的には切断刃63は、その最も先端の位置において、2つの斜辺L1,L1によって第1先端角θ1をなしている。また切断刃63は、その最も先端の位置から若干基部寄り(図4では切断刃63の上方側)の位置で、各斜辺L1に連なる別の斜辺L2,L2によって第2先端角θ2をなしている。第1先端角θ1は、第2先端角θ2よりも大きくなっている。切断刃63の先端角を2段に変化させ、かつ第1先端角θ1を第2先端角θ2よりも大きくすることで、幅の狭いスリットを形成しつつ、切断刃63の摩耗を抑制することができるという有利な効果が奏される。
FIG. 4 shows an enlarged cross-sectional view of the tip portion of the cutting blade 63 provided in the cutter roll 61. The left-right direction of the paper surface in the figure coincides with the axial direction of the cutter roll 61. Moreover, the direction orthogonal to the paper surface in the figure is a direction parallel to the conveyance direction of the precursor 4a. As shown in the figure, the cutting blade 63 has its tip angle changed in two stages. Specifically, the cutting blade 63 forms a first tip angle θ1 by two hypotenuses L1, L1 at the most tip position. Further, the cutting blade 63 is at a position slightly closer to the base from the position of the most distal end (above the cutting blade 63 in FIG. 4) and forms a second distal end angle θ2 by the other oblique sides L2 and L2 connected to each oblique side L1. Yes. The first tip angle θ1 is larger than the second tip angle θ2. By changing the tip angle of the cutting blade 63 in two steps and making the first tip angle θ1 larger than the second tip angle θ2, wear of the cutting blade 63 is suppressed while forming a narrow slit. There is an advantageous effect that it is possible.
以上の有利な効果を一層顕著なものとする観点から、第1先端角θ1は40度以上、特に60度以上であることが好ましく、また100度以下、特に90度以下であることが好ましい。例えば第1先端角θ1は、40度以上100度以下、特に60度以上90度以下であることが好ましい。一方、第2先端角θ2は、第1先端角θ1よりも小さいことを条件として、30度以上、特に50度以上であることが好ましく、また90度以下、特に70度以下であることが好ましい。例えば第2先端角θ2は、30度以上90度以下、特に50度以上70度以下であることが好ましい。
第1先端角θ1が、第2先端角θ2よりも大きいと、スリット43,45の周囲に、圧着部43a(圧搾部)が一層生じ易くなる。 From the viewpoint of making the above advantageous effects more remarkable, the first tip angle θ1 is preferably 40 degrees or more, particularly 60 degrees or more, and preferably 100 degrees or less, particularly 90 degrees or less. For example, the first tip angle θ1 is preferably 40 degrees or more and 100 degrees or less, and particularly preferably 60 degrees or more and 90 degrees or less. On the other hand, on the condition that the second tip angle θ2 is smaller than the first tip angle θ1, it is preferably 30 degrees or more, particularly 50 degrees or more, and preferably 90 degrees or less, particularly 70 degrees or less. . For example, the second tip angle θ2 is preferably 30 degrees or greater and 90 degrees or less, and particularly preferably 50 degrees or greater and 70 degrees or less.
When the first tip angle θ1 is larger than the second tip angle θ2, a crimpingportion 43a (squeezing portion) is more likely to be generated around the slits 43 and 45.
第1先端角θ1が、第2先端角θ2よりも大きいと、スリット43,45の周囲に、圧着部43a(圧搾部)が一層生じ易くなる。 From the viewpoint of making the above advantageous effects more remarkable, the first tip angle θ1 is preferably 40 degrees or more, particularly 60 degrees or more, and preferably 100 degrees or less, particularly 90 degrees or less. For example, the first tip angle θ1 is preferably 40 degrees or more and 100 degrees or less, and particularly preferably 60 degrees or more and 90 degrees or less. On the other hand, on the condition that the second tip angle θ2 is smaller than the first tip angle θ1, it is preferably 30 degrees or more, particularly 50 degrees or more, and preferably 90 degrees or less, particularly 70 degrees or less. . For example, the second tip angle θ2 is preferably 30 degrees or greater and 90 degrees or less, and particularly preferably 50 degrees or greater and 70 degrees or less.
When the first tip angle θ1 is larger than the second tip angle θ2, a crimping
縦スリット43や後方スリット45の周囲に、圧着部43a(圧搾部)が存在すると、吸収体に当該スリットを設けたことによる利点が十分に発揮されなくなる恐れがある。例えば、着用者に身体形状に対するフィット性を高めるために設けたスリットであるにもかかわらず、吸収体の柔軟性を十分に高めることがでず、フィット性の向上効果が十分には得られなかったり、着用者の動きに対する追従性を高めるために設けたスリットであるにもかかわらず、着用者の動きに対する追従性を十分に高められなかったりする。
If there is a crimping part 43a (pressing part) around the vertical slit 43 and the rear slit 45, there is a possibility that the advantage of providing the slit in the absorber is not sufficiently exhibited. For example, although it is a slit provided for the wearer to improve the fit to the body shape, the flexibility of the absorber cannot be sufficiently increased, and the effect of improving the fit cannot be sufficiently obtained Even though the slit is provided to improve the followability to the wearer's movement, the followability to the wearer's movement may not be sufficiently improved.
そこで本実施態様においては、以下に述べるとおり、スリット形成工程後に、この圧搾部を柔軟化させる柔軟化工程を行う。
Therefore, in this embodiment, as described below, after the slit forming process, a softening process is performed to soften the compressed portion.
本実施態様における柔軟化工程においては、スリット形成工程においてスリット43,45を形成した吸収体前駆体4’(以下、簡便のため「スリット付前駆体4’」とも言う。)に対して、第1のロール71(巻き掛け部)を備えた柔軟化手段70を用いて柔軟化加工を行う。第1のロール71は、スリット付前駆体4’を、巻き掛け可能な巻き掛け部である。ここで、「巻き掛け」とは、スリット付前駆体4’が第1のロール71の軸方向からみて、第1のロール71と点で接するのではなく、第1のロール71の周面に沿うように接触した状態のことをいう。すなわち、スリット付前駆体4’が第1のロール71にある程度の抱き角を有しながら搬送されることをいう。
In the softening process according to the present embodiment, the absorber precursor 4 ′ in which the slits 43 and 45 are formed in the slit forming process (hereinafter, also referred to as “precursor with slit 4 ′” for the sake of simplicity). The softening process is performed using the softening means 70 including one roll 71 (winding portion). The 1st roll 71 is a winding part which can wind the precursor 4 'with a slit. Here, “winding” means that the precursor 4 ′ with slit is not in contact with the first roll 71 at a point when viewed from the axial direction of the first roll 71, but on the peripheral surface of the first roll 71. A state of contact along the line. That is, it means that the precursor 4 ′ with slit is conveyed to the first roll 71 while having a certain holding angle.
本実施態様における柔軟化手段70は、図3及び図5に示すように、第1のロール71に加えて、スリット付前駆体4’の搬送方向における上流側に配された第2のロール72と、同搬送方向における下流側に配された第3のロール73とを備えている。第1~第3のロール71~73は、それらの軸心71’,72’,73’が互いに平行になるように配置されている。また、第1のロール71と第2のロール72との間にはクリアランスが設けられており、第2のロール72と第3のロール73との間にもクリアランスが設けられている。第1~第3のロールは、何れも、表面が平坦なフラットロールである。
第1のロール71は、第2のロール72と第3のロール73との間の空間内に一部が入り込むように配置されており、より具体的には、ロール71の下側の半分程度が入り込んでいる。
なお、本発明における巻き掛け部としては、ロールのほか、ベルトコンベアにおける、ベルトがロールによって折り返されて断面円弧状に変形した部分等が挙げられる。 As shown in FIGS. 3 and 5, the softening means 70 in the present embodiment includes, in addition to thefirst roll 71, a second roll 72 disposed on the upstream side in the conveying direction of the precursor 4 ′ with slit. And a third roll 73 disposed on the downstream side in the transport direction. The first to third rolls 71 to 73 are arranged such that their axis centers 71 ′, 72 ′, and 73 ′ are parallel to each other. Further, a clearance is provided between the first roll 71 and the second roll 72, and a clearance is also provided between the second roll 72 and the third roll 73. Each of the first to third rolls is a flat roll having a flat surface.
Thefirst roll 71 is disposed so that a part of the first roll 71 enters the space between the second roll 72 and the third roll 73, and more specifically, the lower half of the roll 71. Has entered.
In addition, as a winding part in this invention, the part etc. which the belt | belt conveyor bent by the roll and deform | transformed into circular arc shape other than a roll are mentioned.
第1のロール71は、第2のロール72と第3のロール73との間の空間内に一部が入り込むように配置されており、より具体的には、ロール71の下側の半分程度が入り込んでいる。
なお、本発明における巻き掛け部としては、ロールのほか、ベルトコンベアにおける、ベルトがロールによって折り返されて断面円弧状に変形した部分等が挙げられる。 As shown in FIGS. 3 and 5, the softening means 70 in the present embodiment includes, in addition to the
The
In addition, as a winding part in this invention, the part etc. which the belt | belt conveyor bent by the roll and deform | transformed into circular arc shape other than a roll are mentioned.
柔軟化手段70により柔軟化加工を施す対象のスリット付前駆体4’は、ベルトコンベア等の公知の搬送手段(図示せず)により搬送されて、図5に示すように、第2のロール72の周面上に導入され、次いで第1のロール71の周面上へと受け渡され、更に第3のロール73の周面上へと受け渡された後、第3のロール73の周面から、ベルトコンベア等の公知の搬送手段(図示せず)に受け渡されて、更に下流へと搬送される。
スリット付前駆体4’は、図5に示すように、第2のロール72の周面上においては、第1面a側に凸の断面円弧状の形状に変形され、第1のロール71の周面上においては、第2面b側に凸の断面円弧状の形状に変形され、更に第3のロール73の周面上においては、第2面b側に凸の断面円弧状の形状に変形される。スリット付前駆体4’は、第1~第3のロール71~73の周面に沿う形状に変形させられつつ、第1~第3のロール71~73を通過する。なお、第1~第3のロール71~73は、それ自体がサーボモータ等の駆動手段(図示せず)を備えた駆動ロールであっても良いし、駆動を持たないフリーロールであっても良い。この場合、第1~第3のロール71~73による巻き掛けによってスリット付前駆体4’の搬送性が損なわれないよう、第3のロール73の下流側の直近において駆動ロール(図示せず)を設けることが好ましい。図3中、IIIで示す円内には、第1~第3のロール71~73による柔軟加工後の、吸収体4の厚み方向の断面の状態が表されている。
スリット付前駆体4’は、第2のロール72、第1のロール73及び第3のロール73の周面に沿う形状に順次変形させられながら搬送されることで、圧着部43’において、それまで接合されていた各吸収性シート401,402(吸収層)間が引き剥がされて分離し、各吸収性シート401,402が、スリットが形成される前の状態の非接合状態に戻る。 Theslitted precursor 4 ′ to be softened by the softening means 70 is transported by a known transport means (not shown) such as a belt conveyor, and as shown in FIG. After being introduced onto the circumferential surface of the first roll 71 and then onto the circumferential surface of the third roll 73, the circumferential surface of the third roll 73. Then, it is transferred to a known conveying means (not shown) such as a belt conveyor and further conveyed downstream.
As shown in FIG. 5, the slit-attachedprecursor 4 ′ is deformed into a circular arc shape that is convex toward the first surface “a” on the peripheral surface of the second roll 72. On the peripheral surface, it is deformed into a circular arc shape that is convex toward the second surface b side, and further, on the peripheral surface of the third roll 73, it is formed into a circular arc shape that is convex toward the second surface b side. Deformed. The slitted precursor 4 ′ passes through the first to third rolls 71 to 73 while being deformed into a shape along the peripheral surfaces of the first to third rolls 71 to 73. The first to third rolls 71 to 73 themselves may be drive rolls provided with drive means (not shown) such as a servo motor, or may be free rolls that do not have drive. good. In this case, a drive roll (not shown) is provided in the immediate vicinity of the downstream side of the third roll 73 so that the transportability of the slitted precursor 4 ′ is not impaired by the winding by the first to third rolls 71 to 73. Is preferably provided. In FIG. 3, a circle indicated by III represents the state of the cross section in the thickness direction of the absorbent body 4 after the flexible processing by the first to third rolls 71 to 73.
Theprecursor 4 ′ with slit is conveyed while being sequentially deformed into shapes along the peripheral surfaces of the second roll 72, the first roll 73, and the third roll 73. The absorbent sheets 401 and 402 (absorbing layers) that have been bonded to each other are peeled off and separated, and the absorbent sheets 401 and 402 return to the non-bonded state before the slit is formed.
スリット付前駆体4’は、図5に示すように、第2のロール72の周面上においては、第1面a側に凸の断面円弧状の形状に変形され、第1のロール71の周面上においては、第2面b側に凸の断面円弧状の形状に変形され、更に第3のロール73の周面上においては、第2面b側に凸の断面円弧状の形状に変形される。スリット付前駆体4’は、第1~第3のロール71~73の周面に沿う形状に変形させられつつ、第1~第3のロール71~73を通過する。なお、第1~第3のロール71~73は、それ自体がサーボモータ等の駆動手段(図示せず)を備えた駆動ロールであっても良いし、駆動を持たないフリーロールであっても良い。この場合、第1~第3のロール71~73による巻き掛けによってスリット付前駆体4’の搬送性が損なわれないよう、第3のロール73の下流側の直近において駆動ロール(図示せず)を設けることが好ましい。図3中、IIIで示す円内には、第1~第3のロール71~73による柔軟加工後の、吸収体4の厚み方向の断面の状態が表されている。
スリット付前駆体4’は、第2のロール72、第1のロール73及び第3のロール73の周面に沿う形状に順次変形させられながら搬送されることで、圧着部43’において、それまで接合されていた各吸収性シート401,402(吸収層)間が引き剥がされて分離し、各吸収性シート401,402が、スリットが形成される前の状態の非接合状態に戻る。 The
As shown in FIG. 5, the slit-attached
The
これにより、スリット43,45の周囲に形成された圧着部43a(圧搾部)が柔軟化した、目的とする吸収体の連続体4が首尾よく得られる。吸収体の連続体4は、公知の切断手段により個々の吸収性物品の吸収体の寸法に切断されて、上述した生理用ナプキン1の吸収体の寸法の吸収体4となる。
Thereby, the continuous body 4 of the target absorbent body in which the crimping part 43a (pressing part) formed around the slits 43 and 45 is softened can be successfully obtained. The continuous body 4 of the absorbent body is cut to the size of the absorbent body of the individual absorbent article by a known cutting means to become the absorbent body 4 having the dimensions of the absorbent body of the sanitary napkin 1 described above.
スリット付前駆体4’において、第1面aは、スリット形成時に、カッターロール61側に位置した面であり、第2面bは、スリット形成時に、アンビルロール62側に位置していた面である。
本発明に用いる屈曲加工手段の巻き掛け部は、第1のロール71のように、スリット付前駆体4’を、第1面a側に湾曲させるものであっても良いし、第2及び第3のロール72,73のように、スリット付前駆体4’を、第2面b側に湾曲させるものであっても良いが、本発明に用いる屈曲加工手段は、スリット付前駆体4’を、第1面a側に湾曲させるロール(巻き掛け部)と、第2面b側に湾曲させるロール(巻き掛け部)との両者を備えることが好ましく、本実施態様に用いた屈曲加工手段70のように、スリット付前駆体4’を、一方の面a側に湾曲させる2つのロール(巻き掛け部)と、他方の面b側に湾曲させる1つのロール(巻き掛け部)の合計3本以上のロールを備えることが更に好ましい。 In theprecursor 4 ′ with slit, the first surface a is a surface located on the cutter roll 61 side during slit formation, and the second surface b is a surface located on the anvil roll 62 side during slit formation. is there.
The winding portion of the bending means used in the present invention may be such that, as with thefirst roll 71, the precursor 4 ′ with slit is curved toward the first surface a side, and the second and second 3, the slit precursor 4 ′ may be curved to the second surface b side, but the bending means used in the present invention is the slit precursor 4 ′. It is preferable to include both a roll (winding portion) that is bent toward the first surface a side and a roll (winding portion) that is bent toward the second surface b side, and the bending processing means 70 used in this embodiment. As above, a total of three rolls, that is, two rolls (winding portions) that bend the precursor 4 ′ with slits to the one surface a side and one roll (winding portion) that bends to the other surface b side. More preferably, the above rolls are provided.
本発明に用いる屈曲加工手段の巻き掛け部は、第1のロール71のように、スリット付前駆体4’を、第1面a側に湾曲させるものであっても良いし、第2及び第3のロール72,73のように、スリット付前駆体4’を、第2面b側に湾曲させるものであっても良いが、本発明に用いる屈曲加工手段は、スリット付前駆体4’を、第1面a側に湾曲させるロール(巻き掛け部)と、第2面b側に湾曲させるロール(巻き掛け部)との両者を備えることが好ましく、本実施態様に用いた屈曲加工手段70のように、スリット付前駆体4’を、一方の面a側に湾曲させる2つのロール(巻き掛け部)と、他方の面b側に湾曲させる1つのロール(巻き掛け部)の合計3本以上のロールを備えることが更に好ましい。 In the
The winding portion of the bending means used in the present invention may be such that, as with the
本実施態様においては、図5に示すように、第2のロール72から第1のロール71へと受け渡される部分においては、スリット付前駆体4’が、その搬送方向Rに沿う断面形状がS字状をなすように屈曲しており、第1のロール71から第3のロール73へと受け渡される部分においても、スリット付前駆体4’が、その搬送方向Rに沿う断面形状がS字状をなすように屈曲している。スリット付前駆体4’は、ロールからロールへと受け渡される部分において、その搬送方向の長さ100cm以下の範囲がS字状をなすように屈曲されることが好ましい。なお、本明細書にいうS字状には、左右を反転した逆S字状も含まれる。
In the present embodiment, as shown in FIG. 5, in the portion delivered from the second roll 72 to the first roll 71, the precursor 4 ′ with slit has a cross-sectional shape along the transport direction R. Even in a portion that is bent so as to form an S shape and is transferred from the first roll 71 to the third roll 73, the cross-sectional shape of the precursor 4 ′ with slits along the transport direction R is S. It is bent to form a letter shape. The slit precursor 4 ′ is preferably bent so that a length of 100 cm or less in the conveying direction forms an S shape in a portion that is transferred from roll to roll. Note that the S-shape referred to in this specification includes an inverted S-shape in which left and right are reversed.
第1~第3のロール71~73のうち、スリット付前駆体4’の抱き角が最も大きい第1のロール71の抱き角θ11は、好ましくは10度以上、より好ましくは40度以上であり、また、好ましくは180度以下、より好ましくは90度以下であり、また、好ましくは10度以上180度以下、より好ましくは40度以上90度以下である。
第1ロール71におけるスリット付前駆体4’の抱き角とは、ロールの軸心71’と直交する平面で第1ロール71及びスリット付前駆体4’を切断した断面において、スリット付前駆体4’が第1ロール71と当接する領域における最上流を第1接点P(図示せず)とし、同領域における最下流を第2接点P’(図示せず)とした時、第1接点Pと軸心71’を結ぶ直線(線分)と、第2接点P’と軸心71’を結ぶ直線(線分)とのなす角度をいう。なお、第2ロール72及び第3ロール73におけるスリット付前駆体4’の抱き角についても同様に、第1接点Pと軸心72’又は軸心73’を結ぶ直線(線分)と、第2接線P’と軸心72’又は軸心73’を結ぶ直線(線分)とのなす角度をいう。
また、第1のロール71の半径は、好ましくは10mm以上、より好ましくは15mm以上であり、また、好ましくは50mm以下、より好ましくは20mm以下であり、また好ましくは10mm以上50mm以下、より好ましくは15mm以上20mm以下である。 Of the first tothird rolls 71 to 73, the holding angle θ11 of the first roll 71 having the largest holding angle of the precursor 4 ′ with slit is preferably 10 degrees or more, more preferably 40 degrees or more. Also, it is preferably 180 degrees or less, more preferably 90 degrees or less, and preferably 10 degrees or more and 180 degrees or less, more preferably 40 degrees or more and 90 degrees or less.
The holding angle of theprecursor 4 ′ with slit in the first roll 71 is the cross section obtained by cutting the first roll 71 and the precursor 4 ′ with slit in a plane orthogonal to the axis 71 ′ of the roll. When the uppermost stream in the region where 'is in contact with the first roll 71 is the first contact P (not shown) and the most downstream in the region is the second contact P' (not shown), An angle formed by a straight line (line segment) connecting the axis 71 ′ and a straight line (line segment) connecting the second contact P ′ and the axis 71 ′. Similarly, with respect to the holding angle of the precursor 4 ′ with slit in the second roll 72 and the third roll 73, a straight line (line segment) connecting the first contact P and the axis 72 ′ or the axis 73 ′, The angle formed by the two tangent lines P ′ and a straight line (line segment) connecting the axis 72 ′ or the axis 73 ′.
The radius of thefirst roll 71 is preferably 10 mm or more, more preferably 15 mm or more, preferably 50 mm or less, more preferably 20 mm or less, and preferably 10 mm or more and 50 mm or less, more preferably It is 15 mm or more and 20 mm or less.
第1ロール71におけるスリット付前駆体4’の抱き角とは、ロールの軸心71’と直交する平面で第1ロール71及びスリット付前駆体4’を切断した断面において、スリット付前駆体4’が第1ロール71と当接する領域における最上流を第1接点P(図示せず)とし、同領域における最下流を第2接点P’(図示せず)とした時、第1接点Pと軸心71’を結ぶ直線(線分)と、第2接点P’と軸心71’を結ぶ直線(線分)とのなす角度をいう。なお、第2ロール72及び第3ロール73におけるスリット付前駆体4’の抱き角についても同様に、第1接点Pと軸心72’又は軸心73’を結ぶ直線(線分)と、第2接線P’と軸心72’又は軸心73’を結ぶ直線(線分)とのなす角度をいう。
また、第1のロール71の半径は、好ましくは10mm以上、より好ましくは15mm以上であり、また、好ましくは50mm以下、より好ましくは20mm以下であり、また好ましくは10mm以上50mm以下、より好ましくは15mm以上20mm以下である。 Of the first to
The holding angle of the
The radius of the
第2のロール72及び第3のロール73は、それぞれ、スリット付前駆体4’の抱き角θ12、θ13が、好ましくは10度以上、より好ましくは20度以上であり、また、好ましくは180度以下、より好ましくは45度以下であり、また、好ましくは10度以上180度以下、より好ましくは20度以上45度以下である。
また、第2のロール71及び第3のロール73は、それぞれの半径は、好ましくは10mm以上、より好ましくは15mm以上であり、また、好ましくは50mm以下、より好ましくは20mm以下であり、また好ましくは10mm以上50mm以下、より好ましくは15mm以上20mm以下である。 Each of thesecond roll 72 and the third roll 73 has a holding angle θ12, θ13 of the precursor 4 ′ with a slit of preferably 10 degrees or more, more preferably 20 degrees or more, and preferably 180 degrees. Hereinafter, it is more preferably 45 degrees or less, preferably 10 degrees or more and 180 degrees or less, more preferably 20 degrees or more and 45 degrees or less.
In addition, thesecond roll 71 and the third roll 73 each have a radius of preferably 10 mm or more, more preferably 15 mm or more, and preferably 50 mm or less, more preferably 20 mm or less. Is from 10 mm to 50 mm, more preferably from 15 mm to 20 mm.
また、第2のロール71及び第3のロール73は、それぞれの半径は、好ましくは10mm以上、より好ましくは15mm以上であり、また、好ましくは50mm以下、より好ましくは20mm以下であり、また好ましくは10mm以上50mm以下、より好ましくは15mm以上20mm以下である。 Each of the
In addition, the
また、第1~第3のロール71~73は、スリット43の周辺の圧搾部の柔軟化の観点から、少なくとも一つのロールの半径が、スリット43の、スリット付前駆体4’の搬送方向における長さの4倍以下であることが好ましく、二つ以上のロールの半径が、該スリット43の前記長さの4倍以下であることが好ましく、総てのロールの半径が、該スリット43の前記長さの4倍以下であることが好ましい。
ここでいう、スリットの長さは、図3に示すスリット43のように、スリットが搬送方向と平行に形成されている場合は、そのスリットの長手方向の全長であり、スリットが搬送方向と平行に形成されていない場合には、搬送方向におけるスリットの前端縁と後端縁との間の搬送方向の長さとする。 The first tothird rolls 71 to 73 have a radius of at least one roll in the conveying direction of the slit-formed precursor 4 ′ from the viewpoint of softening the compressed portion around the slit 43. Preferably, the radius of two or more rolls is preferably 4 times or less of the length of the slit 43, and the radius of all the rolls is less than 4 times the length of the slit 43. The length is preferably 4 times or less of the length.
The length of the slit here is the total length in the longitudinal direction of the slit when the slit is formed in parallel with the transport direction like theslit 43 shown in FIG. 3, and the slit is parallel to the transport direction. If it is not formed, the length in the conveyance direction between the front edge and the rear edge of the slit in the conveyance direction is set.
ここでいう、スリットの長さは、図3に示すスリット43のように、スリットが搬送方向と平行に形成されている場合は、そのスリットの長手方向の全長であり、スリットが搬送方向と平行に形成されていない場合には、搬送方向におけるスリットの前端縁と後端縁との間の搬送方向の長さとする。 The first to
The length of the slit here is the total length in the longitudinal direction of the slit when the slit is formed in parallel with the transport direction like the
柔軟化工程で柔軟化させるスリットは、このように定義される搬送方向における長さが、好ましくは2mm以上、より好ましくは5mm以上であり、また好ましくは100mm以下、より好ましくは50mm以下であり、また好ましくは2mm以上100mm以下、より好ましくは5mm以上50mm以下である。
なお、巻き掛け部が円筒状のロールである場合の曲率半径は、ロールの半径と同じである。 The slit to be softened in the softening step has a length in the transport direction defined as described above of preferably 2 mm or more, more preferably 5 mm or more, and preferably 100 mm or less, more preferably 50 mm or less, Further, it is preferably 2 mm or more and 100 mm or less, more preferably 5 mm or more and 50 mm or less.
Note that the radius of curvature when the winding portion is a cylindrical roll is the same as the radius of the roll.
なお、巻き掛け部が円筒状のロールである場合の曲率半径は、ロールの半径と同じである。 The slit to be softened in the softening step has a length in the transport direction defined as described above of preferably 2 mm or more, more preferably 5 mm or more, and preferably 100 mm or less, more preferably 50 mm or less, Further, it is preferably 2 mm or more and 100 mm or less, more preferably 5 mm or more and 50 mm or less.
Note that the radius of curvature when the winding portion is a cylindrical roll is the same as the radius of the roll.
他方、巻き掛け部がロールではない場合、例えば、巻き掛け部が、ベルトコンベアにおける、ベルトがロールによって折り返されて断面円弧状に変形した部分である場合には、その断面円弧状に変形したベルトの曲率半径が、スリット付前駆体4’の搬送方向における長さの4倍以下であることが好ましい。
また、本発明における柔軟化工程は、搬送方向に延びる直線状に形成されたスリットに対して一層優れた柔軟化効果が得られる。 On the other hand, when the winding portion is not a roll, for example, when the winding portion is a portion of the belt conveyor that is bent by the roll and deformed into a cross-section arc shape, the belt deformed into the cross-section arc shape. It is preferable that the curvature radius of is 4 times or less the length in the conveyance direction of theprecursor 4 ′ with slit.
Moreover, the softening process in the present invention can provide a further excellent softening effect for the slits formed in a straight line extending in the transport direction.
また、本発明における柔軟化工程は、搬送方向に延びる直線状に形成されたスリットに対して一層優れた柔軟化効果が得られる。 On the other hand, when the winding portion is not a roll, for example, when the winding portion is a portion of the belt conveyor that is bent by the roll and deformed into a cross-section arc shape, the belt deformed into the cross-section arc shape. It is preferable that the curvature radius of is 4 times or less the length in the conveyance direction of the
Moreover, the softening process in the present invention can provide a further excellent softening effect for the slits formed in a straight line extending in the transport direction.
図6は、本発明の他の実施態様を示す図である。
図6に示す実施態様においては、上述した切断装置60と同一構成の切断装置60を用いて、吸収体前駆体4Aからスリット付前駆体4’を形成した後、切断刃83を有するカッターロール81と、カッターロールの切断刃83を受けるアンビルロール82とを備えたエンドカット装置80で、スリット付前駆体4’を、個々の吸収体4の寸法に切断して枚葉のスリット付前駆体4’とし、その枚葉のスリット付前駆体4’に対して、外周面に吸引孔を備えたトランスファーロール75(巻き掛け部)を備えた第1の屈曲加工手段70Aを用いて、第1の柔軟化工程を行っている。トランスファーロール75は、その回転方向において、枚葉のスリット付前駆体4’の受領部P1より手前の位置から、ベルトコンベア79への受け渡し部P2を超える位置までの範囲P3において、外周面からの吸引が可能となっている。前記の範囲P3において、外周面からの吸引を行いつつ、枚葉のスリット付前駆体4’を、トランスファーロール75の周面沿った形状に変形させることで、非連続体である枚葉のスリット付前駆体4’についても、スリット付前駆体4’の、ロール外周面からの浮き上がりを防止しつつ、スリットの周囲の圧着部43a(圧搾部)を効率よく柔軟化させることができる。 FIG. 6 is a diagram showing another embodiment of the present invention.
In the embodiment shown in FIG. 6, thecutter roll 81 having the cutting blade 83 is formed after the slit precursor 4 ′ is formed from the absorber precursor 4 </ b> A using the cutting device 60 having the same configuration as the cutting device 60 described above. And an anvil roll 82 that receives the cutter blade 83 of the cutter roll, the slit-cured precursor 4 'is cut into the size of each absorber 4 and the single-wafer slit-cured precursor 4 is cut. The first bend processing means 70A provided with a transfer roll 75 (winding portion) provided with a suction hole on the outer peripheral surface thereof is used for the single-wafer slit precursor 4 ′. We are conducting a softening process. In the rotational direction, the transfer roll 75 is separated from the outer peripheral surface in a range P3 from a position in front of the receiving portion P1 of the sheet precursor 4 ′ with slit to a position exceeding the delivery portion P2 to the belt conveyor 79. Suction is possible. In the above-mentioned range P3, the sheet-shaped slit precursor 4 ′ is deformed into a shape along the peripheral surface of the transfer roll 75 while performing suction from the outer peripheral surface. Also with the precursor 4 ′, it is possible to efficiently soften the pressure-bonding portion 43a (squeezing portion) around the slit while preventing the precursor 4 ′ with slit from lifting from the outer peripheral surface of the roll.
図6に示す実施態様においては、上述した切断装置60と同一構成の切断装置60を用いて、吸収体前駆体4Aからスリット付前駆体4’を形成した後、切断刃83を有するカッターロール81と、カッターロールの切断刃83を受けるアンビルロール82とを備えたエンドカット装置80で、スリット付前駆体4’を、個々の吸収体4の寸法に切断して枚葉のスリット付前駆体4’とし、その枚葉のスリット付前駆体4’に対して、外周面に吸引孔を備えたトランスファーロール75(巻き掛け部)を備えた第1の屈曲加工手段70Aを用いて、第1の柔軟化工程を行っている。トランスファーロール75は、その回転方向において、枚葉のスリット付前駆体4’の受領部P1より手前の位置から、ベルトコンベア79への受け渡し部P2を超える位置までの範囲P3において、外周面からの吸引が可能となっている。前記の範囲P3において、外周面からの吸引を行いつつ、枚葉のスリット付前駆体4’を、トランスファーロール75の周面沿った形状に変形させることで、非連続体である枚葉のスリット付前駆体4’についても、スリット付前駆体4’の、ロール外周面からの浮き上がりを防止しつつ、スリットの周囲の圧着部43a(圧搾部)を効率よく柔軟化させることができる。 FIG. 6 is a diagram showing another embodiment of the present invention.
In the embodiment shown in FIG. 6, the
図6に示す実施態様においては、トランスファーロール75を用いた第1の柔軟化工程後に、枚葉のスリット付前駆体4’に、帯状の連続シート76を合流させ、その後、連続シート76と、連続シート76の片面上に間欠的に配置された枚葉のスリット付前駆体4’とからなる積層体77に対して、第2の屈曲加工手段70Bを用いて第2の柔軟化工程を行っている。
第2の屈曲加工手段70Bは、第1のロール71Aが、吸引機構を備えている点を除いて、上述した屈曲加工手段70と同様の構成を有している。
第1のロール71Aの周面には、複数の吸引孔が開口しており、開口部以外の部分は平坦となっている。第1のロール71Aは、周面の開口部と側面に設けた開口部とを連通する吸気路を有しており、側面に設けた開口部と該側面に対向配置した円弧状の吸引装置とが重なっている間、周面からの吸引が行われる。
第2の屈曲加工手段70Bによる第2の柔軟化工程においても、第1のロール71Aの周面からの吸引を行いつつ、前記の積層体77を、第1のロール71Aの周面沿った形状に変形させることで、積層体77に含まれる枚葉のスリット付前駆体4’における、スリットの周囲の圧着部43a(圧搾部)を効率よく柔軟化させることができる。
帯状の連続シート77と積層した状態で、スリット付前駆体4’に柔軟化工程を行うことは、枚葉のスリット付前駆体4’の搬送方向Rにおける前端及び後端と、切断刃64によって付けられた後方スリット45が、第2の屈曲加工手段70Bに引っ掛かる事による位相ずれや折れ曲がり、捲れ等の加工不良を抑止する利点がある。第1のロール71Aの吸引範囲P4は、スリット付前駆体4’の接触する範囲と同じにして、第1のロール71A上で積層体77が曲げられている間のみ吸引保持することが、スリット付前駆体4’の浮き上がり防止の観点から好ましい。
また、帯状の連続シート76としては、通気性を有するシートが好ましく、例えば、通気性を有する不織布からなる表面シートの帯状原反を用いることができる。 In the embodiment shown in FIG. 6, after the first softening step using thetransfer roll 75, the continuous sheet 76 having a strip shape is joined to the sheet-formed precursor 4 ′, and then the continuous sheet 76. A second softening process is performed using the second bending means 70B on the laminated body 77 composed of the sheet-shaped precursor 4 ′ with slits intermittently arranged on one side of the continuous sheet 76. ing.
The second bending means 70B has the same configuration as the bending means 70 described above, except that thefirst roll 71A includes a suction mechanism.
A plurality of suction holes are opened on the peripheral surface of thefirst roll 71A, and portions other than the opening are flat. The first roll 71A has an intake passage that communicates the opening on the circumferential surface with the opening provided on the side surface, and the opening provided on the side surface and an arcuate suction device disposed opposite to the side surface While the two are overlapped, suction from the peripheral surface is performed.
Also in the second softening step by the second bending means 70B, thelaminated body 77 is shaped along the peripheral surface of the first roll 71A while performing suction from the peripheral surface of the first roll 71A. By deforming to the above, it is possible to efficiently soften the pressure-bonding portion 43a (pressing portion) around the slit in the single-sheet precursor 4 ′ with slit included in the laminate 77.
In the state of being laminated with the belt-likecontinuous sheet 77, the slitting precursor 4 ′ is subjected to the softening step by the front end and the rear end in the conveying direction R of the sheet precursor 4 ′ with slits, and the cutting blade 64. The attached rear slit 45 has an advantage of suppressing processing defects such as phase shift, bending, and kinking due to being caught by the second bending processing means 70B. The suction range P4 of the first roll 71A is the same as the contact range of the precursor 4 ′ with slit, and it is possible to suck and hold only while the laminated body 77 is bent on the first roll 71A. This is preferable from the viewpoint of preventing the attached precursor 4 'from being lifted.
Moreover, as the strip | belt-shapedcontinuous sheet 76, the sheet | seat which has air permeability is preferable, For example, the strip | belt-shaped original fabric of the surface sheet which consists of a nonwoven fabric which has air permeability can be used.
第2の屈曲加工手段70Bは、第1のロール71Aが、吸引機構を備えている点を除いて、上述した屈曲加工手段70と同様の構成を有している。
第1のロール71Aの周面には、複数の吸引孔が開口しており、開口部以外の部分は平坦となっている。第1のロール71Aは、周面の開口部と側面に設けた開口部とを連通する吸気路を有しており、側面に設けた開口部と該側面に対向配置した円弧状の吸引装置とが重なっている間、周面からの吸引が行われる。
第2の屈曲加工手段70Bによる第2の柔軟化工程においても、第1のロール71Aの周面からの吸引を行いつつ、前記の積層体77を、第1のロール71Aの周面沿った形状に変形させることで、積層体77に含まれる枚葉のスリット付前駆体4’における、スリットの周囲の圧着部43a(圧搾部)を効率よく柔軟化させることができる。
帯状の連続シート77と積層した状態で、スリット付前駆体4’に柔軟化工程を行うことは、枚葉のスリット付前駆体4’の搬送方向Rにおける前端及び後端と、切断刃64によって付けられた後方スリット45が、第2の屈曲加工手段70Bに引っ掛かる事による位相ずれや折れ曲がり、捲れ等の加工不良を抑止する利点がある。第1のロール71Aの吸引範囲P4は、スリット付前駆体4’の接触する範囲と同じにして、第1のロール71A上で積層体77が曲げられている間のみ吸引保持することが、スリット付前駆体4’の浮き上がり防止の観点から好ましい。
また、帯状の連続シート76としては、通気性を有するシートが好ましく、例えば、通気性を有する不織布からなる表面シートの帯状原反を用いることができる。 In the embodiment shown in FIG. 6, after the first softening step using the
The second bending means 70B has the same configuration as the bending means 70 described above, except that the
A plurality of suction holes are opened on the peripheral surface of the
Also in the second softening step by the second bending means 70B, the
In the state of being laminated with the belt-like
Moreover, as the strip | belt-shaped
以上の実施形態のナプキン1における各部の形成材料について説明すると、表面シート2及び裏面シート3としては、当該技術分野において従来用いられている各種のものを特に制限なく用いることができる。表面シート2としては、例えば、親水化処理が施された各種不織布や開孔フィルム等の液透過性のシートを用いることができる。また、裏面シート3としては、液不透過性の材料や撥水性の材料を用いることができる。液不透過性の材料としては、樹脂フィルムや、微細孔を有し、透湿性を有する樹脂フィルム、樹脂フィルムと不織布等とのラミネート材等を用いることができ、撥水性の材料としては、スパンボンド・メルトブローン・スパンボンド等からなる多層構造の複合不織布、スパンボンド不織布、ヒートボンド不織布、エアスルー不織布等を用いることができる。
The material for forming each part of the napkin 1 according to the above embodiment will be described. As the top sheet 2 and the back sheet 3, various materials conventionally used in the technical field can be used without any particular limitation. As the surface sheet 2, for example, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to a hydrophilic treatment can be used. Moreover, as the back sheet 3, a liquid-impermeable material or a water-repellent material can be used. As the liquid-impermeable material, a resin film, a resin film having fine pores and moisture permeability, a laminate material of a resin film and a nonwoven fabric, and the like can be used. A composite nonwoven fabric having a multilayer structure composed of bond, meltblown, spunbond, or the like, a spunbond nonwoven fabric, a heat bond nonwoven fabric, an air-through nonwoven fabric, or the like can be used.
吸収体4を構成する吸収性シート401,402としては、湿潤した紙や不織布上に高吸収性ポリマーを散布し、その上に紙や不織布を重ね合わせた後、乾燥して一体化させた吸収性シートを用いることができる。
このような吸収性シートとしては、例えば、特開平8-246395号公報に記載の吸収性シートを用いることもできる。
この吸収性シートは、一枚を所定形状に裁断してシート状吸収体として用いることができる。吸収性シート1枚あたりの厚みとしては、好ましくは0.1mm以上、特に0.3mm以上であり、また2mm以下、特に1.5mm以下であることが好ましい。より具体的には、0.1mm以上2mm以下、特に0.3mm以上1.5mm以下であることが好ましい。 As the absorbent sheets 401 and 402 constituting the absorbent body 4, a superabsorbent polymer is sprayed on wet paper or nonwoven fabric, and the paper or nonwoven fabric is superimposed thereon, and then dried and integrated. Can be used.
As such an absorbent sheet, for example, an absorbent sheet described in JP-A-8-246395 can be used.
This absorbent sheet can be cut into a predetermined shape and used as a sheet-like absorber. The thickness per absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, particularly preferably 0.3 mm or more and 1.5 mm or less.
このような吸収性シートとしては、例えば、特開平8-246395号公報に記載の吸収性シートを用いることもできる。
この吸収性シートは、一枚を所定形状に裁断してシート状吸収体として用いることができる。吸収性シート1枚あたりの厚みとしては、好ましくは0.1mm以上、特に0.3mm以上であり、また2mm以下、特に1.5mm以下であることが好ましい。より具体的には、0.1mm以上2mm以下、特に0.3mm以上1.5mm以下であることが好ましい。 As the
As such an absorbent sheet, for example, an absorbent sheet described in JP-A-8-246395 can be used.
This absorbent sheet can be cut into a predetermined shape and used as a sheet-like absorber. The thickness per absorbent sheet is preferably 0.1 mm or more, particularly 0.3 mm or more, and preferably 2 mm or less, particularly 1.5 mm or less. More specifically, it is preferably 0.1 mm or more and 2 mm or less, particularly preferably 0.3 mm or more and 1.5 mm or less.
以上、本発明をその好ましい実施形態に基づき説明したが、本発明は前記実施形態に制限されない。例えば、ナプキン1は、ウイング部7を有しないものであっても良い。また、吸収性本体5の後方部における両側に、ショーツの内面に広げて固定する後方フラップ部を有するものであっても良い。また、吸収体には、後方スリット45を形成せず、縦スリット43のみを形成しても良い。また、図6に示す吸収体の製造方法においては、トランスファーロール75を用いた第1柔軟化工程を省略しても良く、第2の屈曲加工手段71Aを用いた、帯状の連続シートの積層や第2柔軟化工程を省略しても良い。搬送方向と平行な縦スリットに代えて、搬送方向及びその直交する方向の両方向に対して傾斜したスリットを形成しても良い。また、製造する吸収体は、多層部42を有さず、全域に亘って吸収性シートの積層数が同じであっても良い。また、多層部42を設ける場合の多層部42における吸収性シートの積層数は、図2に示す枚数に限られず、多層部42とそれ以外の部分との吸収性シートの積層枚数の差も図2に示す枚数に限られない。
As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, the napkin 1 may not have the wing part 7. Moreover, you may have a back flap part which spreads and fixes to the inner surface of shorts in the both sides in the back part of the absorptive main body 5. FIG. Further, only the longitudinal slit 43 may be formed in the absorber without forming the rear slit 45. Moreover, in the manufacturing method of the absorber shown in FIG. 6, the 1st softening process using the transfer roll 75 may be abbreviate | omitted, the lamination | stacking of a strip | belt-shaped continuous sheet using the 2nd bending process means 71A, The second softening step may be omitted. Instead of the vertical slit parallel to the transport direction, a slit inclined with respect to both the transport direction and the direction perpendicular thereto may be formed. Moreover, the absorber manufactured does not have the multilayer part 42, but the lamination | stacking number of an absorbent sheet may be the same over the whole region. Further, the number of laminated absorbent sheets in the multilayer portion 42 in the case where the multilayer portion 42 is provided is not limited to the number shown in FIG. 2, and the difference in the number of laminated absorbent sheets between the multilayer portion 42 and other portions is also illustrated. It is not limited to the number shown in 2.
上述した実施形態においては、吸収体4を構成する本体吸収性シート401及び中央吸収性シート402は、それぞれ折り畳まれて複数層からなる積層構造となっていたが、これに代えて、枚葉の吸収性シートを複数枚積層したものでも良い。また、吸収性シートの折り畳み方も多様な折り畳み方を採用でき、例えば、補助吸収体41は、中央吸収性シート402を、図8(a)~図8(d)に示すような折り畳み方で折り畳んだものであっても良い。
本発明の製造の対象となる吸収体はこのような形態のものに限られず、他の形態、例えばパルプ繊維と吸水性ポリマーとの積繊堆積体であってもよい。この場合、第1及び/又は第2の柔軟化工程を通過する事で圧着部43におけるパルプ繊維間が引き剥がされて分離し、パルプの繊維間距離が広がる事によって柔軟化の効果が得られる。 In the embodiment described above, the main bodyabsorbent sheet 401 and the central absorbent sheet 402 constituting the absorbent body 4 are each folded to form a laminated structure composed of a plurality of layers. A laminate of a plurality of absorbent sheets may be used. In addition, the absorbent sheet can be folded in various ways. For example, the auxiliary absorbent body 41 has the central absorbent sheet 402 folded as shown in FIGS. 8 (a) to 8 (d). It may be folded.
The absorbent body to be manufactured in the present invention is not limited to such a form, and may be another form, for example, a pile pile of pulp fibers and a water-absorbing polymer. In this case, by passing through the first and / or second softening step, the pulp fibers in the crimpingportion 43 are peeled apart and separated, and the distance between the pulp fibers is widened to obtain the effect of softening. .
本発明の製造の対象となる吸収体はこのような形態のものに限られず、他の形態、例えばパルプ繊維と吸水性ポリマーとの積繊堆積体であってもよい。この場合、第1及び/又は第2の柔軟化工程を通過する事で圧着部43におけるパルプ繊維間が引き剥がされて分離し、パルプの繊維間距離が広がる事によって柔軟化の効果が得られる。 In the embodiment described above, the main body
The absorbent body to be manufactured in the present invention is not limited to such a form, and may be another form, for example, a pile pile of pulp fibers and a water-absorbing polymer. In this case, by passing through the first and / or second softening step, the pulp fibers in the crimping
また前記実施形態は、本発明を生理用ナプキンの吸収体の製造に適用した例であるが、本発明は、他の吸収性物品の吸収体、例えば使い捨ておむつ、失禁パッド、パンティライナ等の吸収体の製造にも同様に適用できる。
Moreover, although the said embodiment is an example which applied this invention to manufacture of the absorber of a sanitary napkin, this invention absorbs absorbers, such as a disposable diaper, an incontinence pad, a panty liner, etc. of other absorbent articles. The same applies to the manufacture of the body.
上述した実施形態に関し、本発明は更に以下の吸収体の製造方法及び製造装置を開示する。
<1>
吸収体前駆体を一方向に向けて搬送させながら、該吸収体前駆体の厚み方向に向けて切り込みを入れて、スリットを有する吸収体を製造する方法であって、
周面に切断刃を有するカッターロールと、該カッターロールの該切断刃を受けるアンビルロールとで吸収体前駆体を挟圧し、該切断刃を該吸収体前駆体の厚み方向に沿って該吸収体前駆体内に進行させることにより、該吸収体前駆体に周囲に圧着部を有するスリットを形成するスリット形成工程と、
前記スリットを形成した吸収体前駆体を、屈曲加工手段の巻き掛け部に巻き掛けて変形させることにより前記圧着部を柔軟化させる柔軟化工程とを具備する、吸収体の製造方法。
<2>
前記吸収体は、複数の吸収層を有する積層構造を有しており、
前記スリット形成工程においては、前記圧着部として、複数の吸収層間が圧着された圧着部を形成し、前記柔軟化工程においては、該圧着部における少なくとも一つの吸収層間を分離させて、該圧着部を柔軟化させる、<1>記載の吸収体の製造方法。
<3>
前記屈曲加工手段は、前記巻き掛け部として、少なくとも一本のロールを備えており、少なくとも一本のロールは、前記スリットを形成した吸収体前駆体の抱き角が10度以上180度以下である、<1>又は<2>記載の吸収体の製造方法。
<4>
前記巻き掛け部は、表面に複数の吸引孔を有し、前記スリットを形成した吸収体前駆体を、吸引により該表面に保持しつつ変形させる、<1>~<3>の何れか1に記載の吸収体の製造方法。
<5>
前記屈曲加工手段は、前記巻き掛け部を複数有しており、前記スリットを形成した吸収体前駆体を、断面S字状に屈曲させる、<1>~<4>の何れか1に記載の吸収体の製造方法。
<6>
前記吸収体前駆体又は前記吸収体は、吸収性物品の***部対向部に配される部位に多層部を有しており、該多層部は、該吸収体を構成する吸収性シートの積層枚数が、その周囲に位置する部分より多い部分である、<1>~<5>の何れか1に記載の吸収体の製造方法。
<7>
前記多層部は、その周囲に位置する部分よりも厚みも厚く、吸収性物品の***部対向部に配される部位に、吸収性物品の表面シート側に突出する***部を形成している、<6>に記載の吸収体の製造方法。
<8>
前記吸収体は、吸収性シートの積層構造のみから構成されている、<1>~<7>の何れか1に記載の吸収体の製造方法。
<9>
前記吸収体前駆体又は前記吸収体は、単層又は多層構造とされた吸収性シートからなり、該吸収性シートは、湿潤した紙や不織布上に高吸収性ポリマーを散布し、その上に紙や不織布を重ね合わせた後、乾燥して一体化させたものである、<1>~<8>の何れか1に記載の吸収体の製造方法。
<10>
前記スリットは、前記吸収体前駆体の搬送方向に延びる直線状に形成される、<1>~<9>の何れか1に記載の吸収体の製造方法。
<11>
前記吸収体前駆体又は前記吸収体には、吸収性物品の***部対向部に配される部位に、該吸収性物品の縦方向Xに沿う縦スリットが複数、分散した状態に形成されている、<1>~<10>の何れか1に記載の吸収体の製造方法。
<12>
吸収体前駆体又は前記吸収体に、吸収性物品の縦方向Xに沿う縦スリットを、吸収性物品の縦方向X及び横方向Yの両方向に分散した状態に形成する、<1>~<10>の何れか1に記載の吸収体の製造方法。
<13>
吸収性物品の縦方向Xに沿う縦スリットを、前記吸収体前駆体をその厚み方向に向けて切り込むことで形成し、該縦スリットは、前記吸収体を構成する吸収性シートの積層構造を貫通している、<1>~<12>の何れか1に記載の吸収体の製造方法。
<14>
前記吸収体前駆体又は前記吸収体に、吸収性物品の縦方向Xに沿う複数の縦スリットが形成されており、各縦スリットは個々に独立しており、隣り合う縦スリットどうしの間には非スリット部が位置しており、縦スリットは、その周囲の全域が非スリット部によって囲まれている、<1>~<13>の何れか1に記載の吸収体の製造方法。
<15>
前記吸収体は、吸収性物品の***部対向部より後方に位置する後方部に、吸収性物品の縦方向と交差する方向へ長手方向を有するように延びる複数本の後方スリットを有する、<1>~<13>の何れか1に記載の吸収体の製造方法。
<16>
前記後方スリットは、スリットの長手方向の中央部の位置が、該長手方向の両端部の位置よりも吸収性物品の前方部側に位置する平面視形状を有し、好ましくは、該前方部側に向かって凸に湾曲した平面視形状を有している、<15>に記載の吸収体の製造方法。
<17>
前記後方スリットは、吸収性物品の縦方向Xに間隔を開けて複数本形成されている、<15>又は<16>に記載の吸収体の製造方法。
<18>
前記切断刃は、その最も先端の位置に、2つの斜辺L1,L1によって形成される第1先端角θ1を有し、その最も先端の位置から若干基部寄りの位置に、各斜辺L1に連なる別の斜辺L2,L2によって形成される第2先端角θ2を有し、第1先端角θ1は、第2先端角θ2よりも大きくなっている、<1>~<16>の何れか1に記載の吸収体の製造方法。
<19>
第1先端角θ1は40度以上、特に60度以上であることが好ましく、また100度以下、特に90度以下であることが好ましく、また第1先端角θ1は、40度以上100度以下、特に60度以上90度以下であることが好ましい、<18>の何れか1に記載の吸収体の製造方法。
<20>
第2先端角θ2は、第1先端角θ1よりも小さいことを条件として、30度以上、特に50度以上であることが好ましく、また90度以下、特に70度以下であることが好ましく、また第2先端角θ2は、30度以上90度以下、特に50度以上70度以下であることが好ましい、<18>又は<19>に記載の吸収体の製造方法。
<21>
前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面a、スリット形成時に前記アンビルロール側に位置していた面を第2面bとしたときに、
屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、第1面a側に湾曲させるロールを備えるものであるか、第2面b側に湾曲させるロールを備えるものであるか、又は、第1面a側に湾曲させるロールと第2面b側に湾曲させるロールとの両者を備えるものである、<1>~<20>の何れか1に記載の吸収体の製造方法。
<22>
前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面a、スリット形成時に前記アンビルロール側に位置していた面を第2面bとしたときに、
屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、第1面a及び第2面bのうちの一方の面側に湾曲させる2つのロールと、他方の面側に湾曲させる1つのロールの合計3本以上のロールを備えている、<1>~<21>の何れか1に記載の吸収体の製造方法。 This invention discloses the manufacturing method and manufacturing apparatus of the following absorber further regarding embodiment mentioned above.
<1>
While conveying the absorber precursor in one direction, making a cut in the thickness direction of the absorber precursor, and manufacturing a absorber having a slit,
The absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor. A slit forming step of forming a slit having a pressure-bonding portion around the absorber precursor by proceeding into the precursor;
The manufacturing method of an absorber which comprises the softening process which softens the said crimping | compression-bonding part by winding the absorber precursor in which the said slit was formed around the winding part of a bending process means, and making it deform | transform.
<2>
The absorber has a laminated structure having a plurality of absorption layers,
In the slit forming step, as the pressure-bonding portion, a pressure-bonding portion in which a plurality of absorption layers are pressure-bonded is formed. In the softening step, at least one absorption layer in the pressure-bonding portion is separated, and the pressure-bonding portion. The manufacturing method of the absorber as described in <1> which softens.
<3>
The bending means includes at least one roll as the winding portion, and the holding angle of the absorber precursor in which the slit is formed is 10 degrees or more and 180 degrees or less. The manufacturing method of the absorber as described in <1> or <2>.
<4>
The winding portion has a plurality of suction holes on the surface, and deforms the absorber precursor in which the slit is formed while being held on the surface by suction. <1> to <3> The manufacturing method of the absorber of description.
<5>
<1> to <4>, wherein the bending means includes a plurality of the winding portions and bends the absorber precursor in which the slit is formed into an S-shaped cross section. Manufacturing method of absorber.
<6>
The absorber precursor or the absorber has a multilayer portion at a portion disposed in the excretory portion facing portion of the absorbent article, and the multilayer portion is the number of laminated absorbent sheets constituting the absorber. The method for producing an absorbent body according to any one of <1> to <5>, wherein is a portion larger than a portion located around the periphery.
<7>
The multilayer portion is thicker than the portion located around it, and forms a raised portion that protrudes toward the topsheet side of the absorbent article at a portion disposed in the excretory part facing portion of the absorbent article. The manufacturing method of the absorber as described in <6>.
<8>
The method for producing an absorbent body according to any one of <1> to <7>, wherein the absorbent body is composed only of a laminated structure of absorbent sheets.
<9>
The absorber precursor or the absorber is composed of an absorbent sheet having a single layer or a multilayer structure, and the absorbent sheet sprays a superabsorbent polymer on wet paper or non-woven fabric, on which paper The method for producing an absorbent body according to any one of <1> to <8>, wherein the nonwoven fabric and the nonwoven fabric are superposed and then dried and integrated.
<10>
The method for manufacturing an absorbent body according to any one of <1> to <9>, wherein the slit is formed in a linear shape extending in a transport direction of the absorbent body precursor.
<11>
In the absorbent body precursor or the absorbent body, a plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in a dispersed state at a portion disposed in the excretory part facing portion of the absorbent article. <1>-<10> The manufacturing method of the absorber as described in any one of <10>.
<12>
In the absorbent body precursor or the absorbent body, longitudinal slits along the longitudinal direction X of the absorbent article are formed in a state dispersed in both the longitudinal direction X and the transverse direction Y of the absorbent article, <1> to <10 The manufacturing method of the absorber of any one of>.
<13>
A longitudinal slit along the longitudinal direction X of the absorbent article is formed by cutting the absorber precursor in the thickness direction, and the longitudinal slit penetrates the laminated structure of the absorbent sheet constituting the absorber. The method for producing an absorbent body according to any one of <1> to <12>.
<14>
A plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in the absorber precursor or the absorber, each longitudinal slit is individually independent, and between adjacent longitudinal slits The method for producing an absorbent body according to any one of <1> to <13>, wherein the non-slit portion is located, and the vertical slit is surrounded by the non-slit portion.
<15>
The absorbent body has a plurality of rear slits extending in the rear part located behind the excretory part facing part of the absorbent article so as to have a longitudinal direction in a direction intersecting the longitudinal direction of the absorbent article. The method for producing an absorbent body according to any one of> to <13>.
<16>
The rear slit has a shape in plan view in which the position of the central portion in the longitudinal direction of the slit is located closer to the front portion side of the absorbent article than the positions of both end portions in the longitudinal direction, preferably the front portion side The manufacturing method of the absorber as described in <15> which has the shape of planar view curved convex toward the surface.
<17>
The said back slit is a manufacturing method of the absorber as described in <15> or <16> currently formed in multiple numbers at intervals in the longitudinal direction X of an absorbent article.
<18>
The cutting blade has a first tip angle θ1 formed by two hypotenuses L1, L1 at the most tip position, and is connected to each hypotenuse L1 at a position slightly closer to the base from the tip end position. <1> to <16>, which has a second tip angle θ2 formed by the hypotenuses L2 and L2, and the first tip angle θ1 is larger than the second tip angle θ2. Method for manufacturing the absorber.
<19>
The first tip angle θ1 is preferably 40 ° or more, particularly preferably 60 ° or more, and is preferably 100 ° or less, particularly preferably 90 ° or less, and the first tip angle θ1 is 40 ° or more and 100 ° or less, The method for producing an absorbent body according to any one of <18>, in particular, preferably from 60 degrees to 90 degrees.
<20>
The second tip angle θ2 is preferably 30 ° or more, particularly 50 ° or more, preferably 90 ° or less, particularly preferably 70 ° or less, provided that the second tip angle θ2 is smaller than the first tip angle θ1. The method for producing an absorbent body according to <18> or <19>, wherein the second tip angle θ2 is preferably 30 degrees or more and 90 degrees or less, particularly preferably 50 degrees or more and 70 degrees or less.
<21>
In the precursor with slit, which is the absorber precursor forming the slit, the surface located on the cutter roll side at the time of slit formation is the first surface a, and the surface located on the anvil roll side at the time of slit formation is the second. When it is set as surface b,
The bending means includes, as the winding portion, a roll that curves the precursor with slit to the first surface a side, or a roll that curves the second surface b side, Alternatively, the method for producing an absorbent body according to any one of <1> to <20>, comprising both a roll that is bent toward the first surface a and a roll that is bent toward the second surface b.
<22>
In the precursor with slit, which is the absorber precursor forming the slit, the surface located on the cutter roll side at the time of slit formation is the first surface a, and the surface located on the anvil roll side at the time of slit formation is the second. When it is set as surface b,
The bending processing means, as the winding part, causes the precursor with a slit to bend to one surface side of the first surface a and the second surface b and to bend to the other surface side 1 The method for producing an absorbent body according to any one of <1> to <21>, comprising a total of three or more rolls of one roll.
<1>
吸収体前駆体を一方向に向けて搬送させながら、該吸収体前駆体の厚み方向に向けて切り込みを入れて、スリットを有する吸収体を製造する方法であって、
周面に切断刃を有するカッターロールと、該カッターロールの該切断刃を受けるアンビルロールとで吸収体前駆体を挟圧し、該切断刃を該吸収体前駆体の厚み方向に沿って該吸収体前駆体内に進行させることにより、該吸収体前駆体に周囲に圧着部を有するスリットを形成するスリット形成工程と、
前記スリットを形成した吸収体前駆体を、屈曲加工手段の巻き掛け部に巻き掛けて変形させることにより前記圧着部を柔軟化させる柔軟化工程とを具備する、吸収体の製造方法。
<2>
前記吸収体は、複数の吸収層を有する積層構造を有しており、
前記スリット形成工程においては、前記圧着部として、複数の吸収層間が圧着された圧着部を形成し、前記柔軟化工程においては、該圧着部における少なくとも一つの吸収層間を分離させて、該圧着部を柔軟化させる、<1>記載の吸収体の製造方法。
<3>
前記屈曲加工手段は、前記巻き掛け部として、少なくとも一本のロールを備えており、少なくとも一本のロールは、前記スリットを形成した吸収体前駆体の抱き角が10度以上180度以下である、<1>又は<2>記載の吸収体の製造方法。
<4>
前記巻き掛け部は、表面に複数の吸引孔を有し、前記スリットを形成した吸収体前駆体を、吸引により該表面に保持しつつ変形させる、<1>~<3>の何れか1に記載の吸収体の製造方法。
<5>
前記屈曲加工手段は、前記巻き掛け部を複数有しており、前記スリットを形成した吸収体前駆体を、断面S字状に屈曲させる、<1>~<4>の何れか1に記載の吸収体の製造方法。
<6>
前記吸収体前駆体又は前記吸収体は、吸収性物品の***部対向部に配される部位に多層部を有しており、該多層部は、該吸収体を構成する吸収性シートの積層枚数が、その周囲に位置する部分より多い部分である、<1>~<5>の何れか1に記載の吸収体の製造方法。
<7>
前記多層部は、その周囲に位置する部分よりも厚みも厚く、吸収性物品の***部対向部に配される部位に、吸収性物品の表面シート側に突出する***部を形成している、<6>に記載の吸収体の製造方法。
<8>
前記吸収体は、吸収性シートの積層構造のみから構成されている、<1>~<7>の何れか1に記載の吸収体の製造方法。
<9>
前記吸収体前駆体又は前記吸収体は、単層又は多層構造とされた吸収性シートからなり、該吸収性シートは、湿潤した紙や不織布上に高吸収性ポリマーを散布し、その上に紙や不織布を重ね合わせた後、乾燥して一体化させたものである、<1>~<8>の何れか1に記載の吸収体の製造方法。
<10>
前記スリットは、前記吸収体前駆体の搬送方向に延びる直線状に形成される、<1>~<9>の何れか1に記載の吸収体の製造方法。
<11>
前記吸収体前駆体又は前記吸収体には、吸収性物品の***部対向部に配される部位に、該吸収性物品の縦方向Xに沿う縦スリットが複数、分散した状態に形成されている、<1>~<10>の何れか1に記載の吸収体の製造方法。
<12>
吸収体前駆体又は前記吸収体に、吸収性物品の縦方向Xに沿う縦スリットを、吸収性物品の縦方向X及び横方向Yの両方向に分散した状態に形成する、<1>~<10>の何れか1に記載の吸収体の製造方法。
<13>
吸収性物品の縦方向Xに沿う縦スリットを、前記吸収体前駆体をその厚み方向に向けて切り込むことで形成し、該縦スリットは、前記吸収体を構成する吸収性シートの積層構造を貫通している、<1>~<12>の何れか1に記載の吸収体の製造方法。
<14>
前記吸収体前駆体又は前記吸収体に、吸収性物品の縦方向Xに沿う複数の縦スリットが形成されており、各縦スリットは個々に独立しており、隣り合う縦スリットどうしの間には非スリット部が位置しており、縦スリットは、その周囲の全域が非スリット部によって囲まれている、<1>~<13>の何れか1に記載の吸収体の製造方法。
<15>
前記吸収体は、吸収性物品の***部対向部より後方に位置する後方部に、吸収性物品の縦方向と交差する方向へ長手方向を有するように延びる複数本の後方スリットを有する、<1>~<13>の何れか1に記載の吸収体の製造方法。
<16>
前記後方スリットは、スリットの長手方向の中央部の位置が、該長手方向の両端部の位置よりも吸収性物品の前方部側に位置する平面視形状を有し、好ましくは、該前方部側に向かって凸に湾曲した平面視形状を有している、<15>に記載の吸収体の製造方法。
<17>
前記後方スリットは、吸収性物品の縦方向Xに間隔を開けて複数本形成されている、<15>又は<16>に記載の吸収体の製造方法。
<18>
前記切断刃は、その最も先端の位置に、2つの斜辺L1,L1によって形成される第1先端角θ1を有し、その最も先端の位置から若干基部寄りの位置に、各斜辺L1に連なる別の斜辺L2,L2によって形成される第2先端角θ2を有し、第1先端角θ1は、第2先端角θ2よりも大きくなっている、<1>~<16>の何れか1に記載の吸収体の製造方法。
<19>
第1先端角θ1は40度以上、特に60度以上であることが好ましく、また100度以下、特に90度以下であることが好ましく、また第1先端角θ1は、40度以上100度以下、特に60度以上90度以下であることが好ましい、<18>の何れか1に記載の吸収体の製造方法。
<20>
第2先端角θ2は、第1先端角θ1よりも小さいことを条件として、30度以上、特に50度以上であることが好ましく、また90度以下、特に70度以下であることが好ましく、また第2先端角θ2は、30度以上90度以下、特に50度以上70度以下であることが好ましい、<18>又は<19>に記載の吸収体の製造方法。
<21>
前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面a、スリット形成時に前記アンビルロール側に位置していた面を第2面bとしたときに、
屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、第1面a側に湾曲させるロールを備えるものであるか、第2面b側に湾曲させるロールを備えるものであるか、又は、第1面a側に湾曲させるロールと第2面b側に湾曲させるロールとの両者を備えるものである、<1>~<20>の何れか1に記載の吸収体の製造方法。
<22>
前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面a、スリット形成時に前記アンビルロール側に位置していた面を第2面bとしたときに、
屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、第1面a及び第2面bのうちの一方の面側に湾曲させる2つのロールと、他方の面側に湾曲させる1つのロールの合計3本以上のロールを備えている、<1>~<21>の何れか1に記載の吸収体の製造方法。 This invention discloses the manufacturing method and manufacturing apparatus of the following absorber further regarding embodiment mentioned above.
<1>
While conveying the absorber precursor in one direction, making a cut in the thickness direction of the absorber precursor, and manufacturing a absorber having a slit,
The absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor. A slit forming step of forming a slit having a pressure-bonding portion around the absorber precursor by proceeding into the precursor;
The manufacturing method of an absorber which comprises the softening process which softens the said crimping | compression-bonding part by winding the absorber precursor in which the said slit was formed around the winding part of a bending process means, and making it deform | transform.
<2>
The absorber has a laminated structure having a plurality of absorption layers,
In the slit forming step, as the pressure-bonding portion, a pressure-bonding portion in which a plurality of absorption layers are pressure-bonded is formed. In the softening step, at least one absorption layer in the pressure-bonding portion is separated, and the pressure-bonding portion. The manufacturing method of the absorber as described in <1> which softens.
<3>
The bending means includes at least one roll as the winding portion, and the holding angle of the absorber precursor in which the slit is formed is 10 degrees or more and 180 degrees or less. The manufacturing method of the absorber as described in <1> or <2>.
<4>
The winding portion has a plurality of suction holes on the surface, and deforms the absorber precursor in which the slit is formed while being held on the surface by suction. <1> to <3> The manufacturing method of the absorber of description.
<5>
<1> to <4>, wherein the bending means includes a plurality of the winding portions and bends the absorber precursor in which the slit is formed into an S-shaped cross section. Manufacturing method of absorber.
<6>
The absorber precursor or the absorber has a multilayer portion at a portion disposed in the excretory portion facing portion of the absorbent article, and the multilayer portion is the number of laminated absorbent sheets constituting the absorber. The method for producing an absorbent body according to any one of <1> to <5>, wherein is a portion larger than a portion located around the periphery.
<7>
The multilayer portion is thicker than the portion located around it, and forms a raised portion that protrudes toward the topsheet side of the absorbent article at a portion disposed in the excretory part facing portion of the absorbent article. The manufacturing method of the absorber as described in <6>.
<8>
The method for producing an absorbent body according to any one of <1> to <7>, wherein the absorbent body is composed only of a laminated structure of absorbent sheets.
<9>
The absorber precursor or the absorber is composed of an absorbent sheet having a single layer or a multilayer structure, and the absorbent sheet sprays a superabsorbent polymer on wet paper or non-woven fabric, on which paper The method for producing an absorbent body according to any one of <1> to <8>, wherein the nonwoven fabric and the nonwoven fabric are superposed and then dried and integrated.
<10>
The method for manufacturing an absorbent body according to any one of <1> to <9>, wherein the slit is formed in a linear shape extending in a transport direction of the absorbent body precursor.
<11>
In the absorbent body precursor or the absorbent body, a plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in a dispersed state at a portion disposed in the excretory part facing portion of the absorbent article. <1>-<10> The manufacturing method of the absorber as described in any one of <10>.
<12>
In the absorbent body precursor or the absorbent body, longitudinal slits along the longitudinal direction X of the absorbent article are formed in a state dispersed in both the longitudinal direction X and the transverse direction Y of the absorbent article, <1> to <10 The manufacturing method of the absorber of any one of>.
<13>
A longitudinal slit along the longitudinal direction X of the absorbent article is formed by cutting the absorber precursor in the thickness direction, and the longitudinal slit penetrates the laminated structure of the absorbent sheet constituting the absorber. The method for producing an absorbent body according to any one of <1> to <12>.
<14>
A plurality of longitudinal slits along the longitudinal direction X of the absorbent article are formed in the absorber precursor or the absorber, each longitudinal slit is individually independent, and between adjacent longitudinal slits The method for producing an absorbent body according to any one of <1> to <13>, wherein the non-slit portion is located, and the vertical slit is surrounded by the non-slit portion.
<15>
The absorbent body has a plurality of rear slits extending in the rear part located behind the excretory part facing part of the absorbent article so as to have a longitudinal direction in a direction intersecting the longitudinal direction of the absorbent article. The method for producing an absorbent body according to any one of> to <13>.
<16>
The rear slit has a shape in plan view in which the position of the central portion in the longitudinal direction of the slit is located closer to the front portion side of the absorbent article than the positions of both end portions in the longitudinal direction, preferably the front portion side The manufacturing method of the absorber as described in <15> which has the shape of planar view curved convex toward the surface.
<17>
The said back slit is a manufacturing method of the absorber as described in <15> or <16> currently formed in multiple numbers at intervals in the longitudinal direction X of an absorbent article.
<18>
The cutting blade has a first tip angle θ1 formed by two hypotenuses L1, L1 at the most tip position, and is connected to each hypotenuse L1 at a position slightly closer to the base from the tip end position. <1> to <16>, which has a second tip angle θ2 formed by the hypotenuses L2 and L2, and the first tip angle θ1 is larger than the second tip angle θ2. Method for manufacturing the absorber.
<19>
The first tip angle θ1 is preferably 40 ° or more, particularly preferably 60 ° or more, and is preferably 100 ° or less, particularly preferably 90 ° or less, and the first tip angle θ1 is 40 ° or more and 100 ° or less, The method for producing an absorbent body according to any one of <18>, in particular, preferably from 60 degrees to 90 degrees.
<20>
The second tip angle θ2 is preferably 30 ° or more, particularly 50 ° or more, preferably 90 ° or less, particularly preferably 70 ° or less, provided that the second tip angle θ2 is smaller than the first tip angle θ1. The method for producing an absorbent body according to <18> or <19>, wherein the second tip angle θ2 is preferably 30 degrees or more and 90 degrees or less, particularly preferably 50 degrees or more and 70 degrees or less.
<21>
In the precursor with slit, which is the absorber precursor forming the slit, the surface located on the cutter roll side at the time of slit formation is the first surface a, and the surface located on the anvil roll side at the time of slit formation is the second. When it is set as surface b,
The bending means includes, as the winding portion, a roll that curves the precursor with slit to the first surface a side, or a roll that curves the second surface b side, Alternatively, the method for producing an absorbent body according to any one of <1> to <20>, comprising both a roll that is bent toward the first surface a and a roll that is bent toward the second surface b.
<22>
In the precursor with slit, which is the absorber precursor forming the slit, the surface located on the cutter roll side at the time of slit formation is the first surface a, and the surface located on the anvil roll side at the time of slit formation is the second. When it is set as surface b,
The bending processing means, as the winding part, causes the precursor with a slit to bend to one surface side of the first surface a and the second surface b and to bend to the other surface side 1 The method for producing an absorbent body according to any one of <1> to <21>, comprising a total of three or more rolls of one roll.
<23>
前記スリットは、前記吸収体前駆体の搬送方向における長さが2mm以上100mm以下である、<1>~<22>の何れか1に記載の吸収体の製造方法。
<24>
前記巻き掛け部の曲率半径は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、<1>~<23>の何れか1に記載の吸収体の製造方法。
<25>
前記巻き掛け部の各ロールの軸間距離は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、<1>~<24>の何れか1に記載の吸収体の製造方法。 <23>
The method for producing an absorbent body according to any one of <1> to <22>, wherein the slit has a length in the transport direction of the absorbent body precursor of 2 mm to 100 mm.
<24>
The method for manufacturing an absorbent body according to any one of <1> to <23>, wherein a radius of curvature of the winding portion is not more than four times the length of the slit in the transport direction of the absorbent body precursor.
<25>
The absorber according to any one of <1> to <24>, wherein an inter-axis distance of each roll of the winding portion is not more than four times the length of the slit in the transport direction of the absorber precursor. Manufacturing method.
前記スリットは、前記吸収体前駆体の搬送方向における長さが2mm以上100mm以下である、<1>~<22>の何れか1に記載の吸収体の製造方法。
<24>
前記巻き掛け部の曲率半径は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、<1>~<23>の何れか1に記載の吸収体の製造方法。
<25>
前記巻き掛け部の各ロールの軸間距離は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、<1>~<24>の何れか1に記載の吸収体の製造方法。 <23>
The method for producing an absorbent body according to any one of <1> to <22>, wherein the slit has a length in the transport direction of the absorbent body precursor of 2 mm to 100 mm.
<24>
The method for manufacturing an absorbent body according to any one of <1> to <23>, wherein a radius of curvature of the winding portion is not more than four times the length of the slit in the transport direction of the absorbent body precursor.
<25>
The absorber according to any one of <1> to <24>, wherein an inter-axis distance of each roll of the winding portion is not more than four times the length of the slit in the transport direction of the absorber precursor. Manufacturing method.
<26>
前記吸収体は、吸収性物品の吸収体である、<1>~<25>の何れか1に記載の吸収体の製造方法。
<27>
吸収性物品は、生理用ナプキン、使い捨ておむつ、失禁パッド又はパンティライナである、前記<26>に記載の吸収体の製造方法。
<28>
前記スリット形成工程においては、前記吸収体の上下に配される、吸収性物品の表面シート及び裏面シートに前記スリットを形成しない、<26>又は<27>に記載の吸収体の製造方法。
<29>
液保持性の吸収体並びに該吸収体の肌対向面側に配置された表面シート及び該吸収体の非肌対向面側に配置された裏面シートを具備する吸収性物品の製造方法であって、
前記吸収体を、前記<1>~<28>の何れか1に記載の方法により製造する、吸収性物品の製造方法。 <26>
The method for producing an absorbent body according to any one of <1> to <25>, wherein the absorbent body is an absorbent body of an absorbent article.
<27>
The absorbent article according to <26>, wherein the absorbent article is a sanitary napkin, a disposable diaper, an incontinence pad, or a panty liner.
<28>
In the said slit formation process, the said slit is not formed in the surface sheet and back surface sheet of an absorbent article which are distribute | arranged above and below the said absorber, The manufacturing method of the absorber as described in <26> or <27>.
<29>
A method for producing an absorbent article comprising a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body,
A method for producing an absorbent article, wherein the absorbent body is produced by the method according to any one of <1> to <28>.
前記吸収体は、吸収性物品の吸収体である、<1>~<25>の何れか1に記載の吸収体の製造方法。
<27>
吸収性物品は、生理用ナプキン、使い捨ておむつ、失禁パッド又はパンティライナである、前記<26>に記載の吸収体の製造方法。
<28>
前記スリット形成工程においては、前記吸収体の上下に配される、吸収性物品の表面シート及び裏面シートに前記スリットを形成しない、<26>又は<27>に記載の吸収体の製造方法。
<29>
液保持性の吸収体並びに該吸収体の肌対向面側に配置された表面シート及び該吸収体の非肌対向面側に配置された裏面シートを具備する吸収性物品の製造方法であって、
前記吸収体を、前記<1>~<28>の何れか1に記載の方法により製造する、吸収性物品の製造方法。 <26>
The method for producing an absorbent body according to any one of <1> to <25>, wherein the absorbent body is an absorbent body of an absorbent article.
<27>
The absorbent article according to <26>, wherein the absorbent article is a sanitary napkin, a disposable diaper, an incontinence pad, or a panty liner.
<28>
In the said slit formation process, the said slit is not formed in the surface sheet and back surface sheet of an absorbent article which are distribute | arranged above and below the said absorber, The manufacturing method of the absorber as described in <26> or <27>.
<29>
A method for producing an absorbent article comprising a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body,
A method for producing an absorbent article, wherein the absorbent body is produced by the method according to any one of <1> to <28>.
以下、実施例により本発明を更に詳細に説明する。
〔実施例1〕
以下に示す吸収性シート(吸収層)を、吸収性シート401,402として用いて、図1及び図2に示す断面構造の帯状の吸収体前駆体4aを製造した。
この帯状の吸収体前駆体4aに対して、図3及び図5に示す装置を用いて、縦スリット43の形成及びそのスリット付前駆体に対する柔軟化加工を行い、スリット付の吸収体を得た。
第1~第3のロールの直径は、何れも37mmとし、配置は、表1及び図8(a)に示す通りとした。スリット付前駆体の搬送方向に延びる直線状のスリット43の長さは、20mmであり、各ロールの半径(曲率半径)の1.08倍に相当する長さであった。 Hereinafter, the present invention will be described in more detail with reference to examples.
[Example 1]
Using the following absorbent sheet (absorbing layer) as the absorbent sheets 401 and 402, a strip-shaped absorber precursor 4a having a cross-sectional structure shown in FIGS. 1 and 2 was produced.
The strip-shapedabsorber precursor 4a was subjected to the formation of the vertical slits 43 and the softening process for the precursor with slits using the apparatus shown in FIGS. 3 and 5 to obtain an absorber with slits. .
The diameters of the first to third rolls were all 37 mm, and the arrangement was as shown in Table 1 and FIG. The length of thelinear slit 43 extending in the conveying direction of the precursor with slit was 20 mm, and was a length corresponding to 1.08 times the radius (curvature radius) of each roll.
〔実施例1〕
以下に示す吸収性シート(吸収層)を、吸収性シート401,402として用いて、図1及び図2に示す断面構造の帯状の吸収体前駆体4aを製造した。
この帯状の吸収体前駆体4aに対して、図3及び図5に示す装置を用いて、縦スリット43の形成及びそのスリット付前駆体に対する柔軟化加工を行い、スリット付の吸収体を得た。
第1~第3のロールの直径は、何れも37mmとし、配置は、表1及び図8(a)に示す通りとした。スリット付前駆体の搬送方向に延びる直線状のスリット43の長さは、20mmであり、各ロールの半径(曲率半径)の1.08倍に相当する長さであった。 Hereinafter, the present invention will be described in more detail with reference to examples.
[Example 1]
Using the following absorbent sheet (absorbing layer) as the
The strip-shaped
The diameters of the first to third rolls were all 37 mm, and the arrangement was as shown in Table 1 and FIG. The length of the
吸収性シート:気流に乗せて供給した架橋セルロース繊維と針葉樹パルプ、高吸水性ポリマーを重量比5:2:3で堆積させた後、接着剤としてPVA(重量比2.4%)で固めた乾式シートを使用した。本体吸収性シート401は坪量75g/m2、厚み0.45mm、中央吸収性シート402は坪量80g/m2、厚み0.50mmである。なお、坪量はJIS-P8124に記載の方法に準じて測定し、厚みはJIS-P8118:1998に準じて測定した。但し、厚みの測定にはピーコック製卓上厚みゲージを用い、5cm×5cmの測定用プレートを載せて2.5g/cm2荷重下の厚みを測定した。
〔実施例2~4〕
実施例2,3については、第1~第3のロールの配置、実施例4については、第1~第3のロールの配置及び第1のロールへの吸収体前駆体4aの導入位置を代えた以外は、実施例1と同様にして、スリット付の吸収体を得た。なお、第1~第3ロールの配置については、実施例2が表1及び図8(b)に示す通り、実施例3が表1及び図8(c)に示す通り、実施例4が表1及び図8(d)に示す通りとした。 Absorbent sheet: Cross-linked cellulose fiber, softwood pulp, and superabsorbent polymer supplied in an air stream were deposited at a weight ratio of 5: 2: 3, and then solidified with PVA (2.4% by weight) as an adhesive A dry sheet was used. The main bodyabsorbent sheet 401 has a basis weight of 75 g / m 2 and a thickness of 0.45 mm, and the central absorbent sheet 402 has a basis weight of 80 g / m 2 and a thickness of 0.50 mm. The basis weight was measured according to the method described in JIS-P8124, and the thickness was measured according to JIS-P8118: 1998. However, the thickness was measured using a peacock-made desk thickness gauge, and a thickness of 2.5 cm / cm 2 was measured by placing a 5 cm × 5 cm measuring plate.
[Examples 2 to 4]
For Examples 2 and 3, the arrangement of the first to third rolls was changed. For Example 4, the arrangement of the first to third rolls and the introduction position of theabsorber precursor 4a to the first roll were changed. Except that, an absorber with a slit was obtained in the same manner as in Example 1. Regarding the arrangement of the first to third rolls, Example 2 is shown in Table 1 and FIG. 8B, Example 3 is shown in Table 1 and FIG. 8C, and Example 4 is shown in FIG. 1 and as shown in FIG.
〔実施例2~4〕
実施例2,3については、第1~第3のロールの配置、実施例4については、第1~第3のロールの配置及び第1のロールへの吸収体前駆体4aの導入位置を代えた以外は、実施例1と同様にして、スリット付の吸収体を得た。なお、第1~第3ロールの配置については、実施例2が表1及び図8(b)に示す通り、実施例3が表1及び図8(c)に示す通り、実施例4が表1及び図8(d)に示す通りとした。 Absorbent sheet: Cross-linked cellulose fiber, softwood pulp, and superabsorbent polymer supplied in an air stream were deposited at a weight ratio of 5: 2: 3, and then solidified with PVA (2.4% by weight) as an adhesive A dry sheet was used. The main body
[Examples 2 to 4]
For Examples 2 and 3, the arrangement of the first to third rolls was changed. For Example 4, the arrangement of the first to third rolls and the introduction position of the
〔比較例1〕
屈曲加工を行わない以外は、実施例1と同様にして、スリット付の吸収体を得た。 [Comparative Example 1]
Except not performing a bending process, it carried out similarly to Example 1, and obtained the absorber with a slit.
屈曲加工を行わない以外は、実施例1と同様にして、スリット付の吸収体を得た。 [Comparative Example 1]
Except not performing a bending process, it carried out similarly to Example 1, and obtained the absorber with a slit.
〔評価〕
実施例及び比較例で得られた吸収体について、下記方法により、多層部の長手方向中央部における曲げ剛性を測定して、その結果を表1に示した。
〔曲げ剛性の測定方法〕
JIS L-1096(一般織物試験方法)に準じて、吸収体曲げ剛性の評価を行った。評価装置は、大栄科学精器製作所社製のハンドロメーター(型式:HOM-3)を用いた。ハンドロメーターの凹溝の幅は20mmに設定した。
得られたスリット付の吸収体を、上記ハンドロメーターの支持台上に、吸収体の多層部の長手方向中心部が凹溝の中央に位置するように載置し、吸収体を幅方向で曲げた時の曲げ剛性の評価を行った。 [Evaluation]
About the absorber obtained by the Example and the comparative example, the bending rigidity in the longitudinal direction center part of a multilayer part was measured with the following method, and the result was shown in Table 1.
[Measurement method of bending stiffness]
The absorber bending stiffness was evaluated according to JIS L-1096 (General Textile Testing Method). As an evaluation device, a handometer (model: HOM-3) manufactured by Daiei Scientific Instruments Co., Ltd. was used. The width of the groove of the handometer was set to 20 mm.
The obtained absorbent body with a slit is placed on the support table of the handometer so that the longitudinal center of the multilayer portion of the absorbent body is located at the center of the concave groove, and the absorbent body in the width direction. The bending stiffness when bent was evaluated.
実施例及び比較例で得られた吸収体について、下記方法により、多層部の長手方向中央部における曲げ剛性を測定して、その結果を表1に示した。
〔曲げ剛性の測定方法〕
JIS L-1096(一般織物試験方法)に準じて、吸収体曲げ剛性の評価を行った。評価装置は、大栄科学精器製作所社製のハンドロメーター(型式:HOM-3)を用いた。ハンドロメーターの凹溝の幅は20mmに設定した。
得られたスリット付の吸収体を、上記ハンドロメーターの支持台上に、吸収体の多層部の長手方向中心部が凹溝の中央に位置するように載置し、吸収体を幅方向で曲げた時の曲げ剛性の評価を行った。 [Evaluation]
About the absorber obtained by the Example and the comparative example, the bending rigidity in the longitudinal direction center part of a multilayer part was measured with the following method, and the result was shown in Table 1.
[Measurement method of bending stiffness]
The absorber bending stiffness was evaluated according to JIS L-1096 (General Textile Testing Method). As an evaluation device, a handometer (model: HOM-3) manufactured by Daiei Scientific Instruments Co., Ltd. was used. The width of the groove of the handometer was set to 20 mm.
The obtained absorbent body with a slit is placed on the support table of the handometer so that the longitudinal center of the multilayer portion of the absorbent body is located at the center of the concave groove, and the absorbent body in the width direction. The bending stiffness when bent was evaluated.
表1に示す結果の比較から、本発明の方法によれば、スリットの周縁部が柔軟で、全体としても柔軟性に優れた吸収体を効率よく製造することが判る。
From the comparison of the results shown in Table 1, it can be seen that according to the method of the present invention, the peripheral portion of the slit is flexible, and an absorber having excellent flexibility as a whole is efficiently produced.
本発明によれば、柔軟なスリットを有する吸収体を効率よく製造することができる。
According to the present invention, an absorber having a flexible slit can be efficiently manufactured.
Claims (29)
- 吸収体前駆体を一方向に向けて搬送させながら、該吸収体前駆体の厚み方向に向けて切り込みを入れて、スリットを有する吸収体を製造する方法であって、
周面に切断刃を有するカッターロールと、該カッターロールの該切断刃を受けるアンビルロールとで吸収体前駆体を挟圧し、該切断刃を該吸収体前駆体の厚み方向に沿って該吸収体前駆体内に進行させることにより、該吸収体前駆体に周囲に圧搾部を有するスリットを形成するスリット形成工程と、
前記スリットを形成した吸収体前駆体を、屈曲加工手段の巻き掛け部に巻き掛けて変形させることにより前記圧搾部を柔軟化させる柔軟化工程とを具備する、吸収体の製造方法。 While conveying the absorber precursor in one direction, making a cut in the thickness direction of the absorber precursor, and manufacturing a absorber having a slit,
The absorber precursor is sandwiched between a cutter roll having a cutting blade on the peripheral surface and an anvil roll that receives the cutting blade of the cutter roll, and the absorber is cut along the thickness direction of the absorber precursor. A slit forming step of forming a slit having a squeezed portion around the absorber precursor by proceeding into the precursor;
The manufacturing method of an absorber which comprises the softening process which softens the said pressing part by winding the absorber precursor in which the said slit was formed around the winding part of a bending process means, and making it deform | transform. - 前記吸収体は、複数の吸収層を有する積層構造を有しており、
前記スリット形成工程においては、前記圧搾部として、複数の吸収層間が圧着された圧着部を形成し、前記柔軟化工程においては、該圧着部における少なくとも一つの吸収層間を分離させて、該圧着部を柔軟化させる、請求項1に記載の吸収体の製造方法。 The absorber has a laminated structure having a plurality of absorption layers,
In the slit forming step, a pressure-bonding portion in which a plurality of absorption layers are pressure-bonded is formed as the pressing portion, and in the softening step, at least one absorption layer in the pressure-bonding portion is separated, and the pressure-bonding portion The manufacturing method of the absorber of Claim 1 which softens. - 前記屈曲加工手段は、前記巻き掛け部として、少なくとも一本のロールを備えており、少なくとも一本のロールは、前記スリットを形成した吸収体前駆体の抱き角が10度以上180度以下である、請求項1又は2に記載の吸収体の製造方法。 The bending means includes at least one roll as the winding portion, and the holding angle of the absorber precursor in which the slit is formed is 10 degrees or more and 180 degrees or less. The manufacturing method of the absorber of Claim 1 or 2.
- 前記巻き掛け部は、表面に複数の吸引孔を有し、前記スリットを形成した吸収体前駆体を、吸引により該表面に保持しつつ変形させる、請求項1~3の何れか1項に記載の吸収体の製造方法。 The wound portion has a plurality of suction holes on a surface thereof, and deforms the absorber precursor formed with the slits while being held on the surface by suction. Method for manufacturing the absorber.
- 前記屈曲加工手段は、前記巻き掛け部を複数有しており、前記スリットを形成した吸収体前駆体を、断面S字状に屈曲させる、請求項1~4の何れか1項に記載の吸収体の製造方法。 The absorption according to any one of claims 1 to 4, wherein the bending means has a plurality of the winding portions, and bends the absorber precursor in which the slit is formed into an S-shaped cross section. Body manufacturing method.
- 前記吸収体前駆体又は前記吸収体は、吸収性シートが複数層積層されてなる積層構造を有し、吸収性物品の***部対向部に配される部位に多層部を有しており、該多層部は、前記吸収性シートの積層枚数が、その周囲に位置する部分より多い部分である、請求項1~5の何れか1項に記載の吸収体の製造方法。 The absorber precursor or the absorber has a laminated structure in which a plurality of layers of absorbent sheets are laminated, and has a multilayer portion at a portion disposed in the excretory portion facing portion of the absorbent article, The method for producing an absorbent body according to any one of claims 1 to 5, wherein the multilayer part is a part in which the number of laminated absorbent sheets is larger than a part located around the absorbent sheet.
- 前記多層部は、その周囲に位置する部分よりも厚みも厚く、吸収性物品の***部対向部に配される部位に、吸収性物品の表面シート側に突出する***部を形成している、請求項6に記載の吸収体の製造方法。 The multilayer portion is thicker than the portion located around it, and forms a raised portion that protrudes toward the topsheet side of the absorbent article at a portion disposed in the excretory part facing portion of the absorbent article. The manufacturing method of the absorber of Claim 6.
- 前記吸収体は、吸収性シートの積層構造のみから構成されている、請求項1~7の何れか1項に記載の吸収体の製造方法。 The method for producing an absorbent body according to any one of claims 1 to 7, wherein the absorbent body is composed only of a laminated structure of absorbent sheets.
- 前記吸収体前駆体又は前記吸収体は、単層又は多層構造とされた吸収性シートからなり、該吸収性シートは、湿潤した紙又は不織布上に高吸収性ポリマーを散布し、その上に紙又は不織布を重ね合わせた後、乾燥して一体化させたものである、請求項1~8の何れか1項に記載の吸収体の製造方法。 The absorber precursor or the absorber is composed of an absorbent sheet having a single layer or a multilayer structure, and the absorbent sheet spreads a superabsorbent polymer on wet paper or non-woven fabric, on which paper is formed. The method for producing an absorbent body according to any one of claims 1 to 8, wherein the nonwoven fabrics are laminated and then dried and integrated.
- 前記スリットは、前記吸収体前駆体の搬送方向に延びる直線状に形成される、請求項1~9の何れか1項に記載の吸収体の製造方法。 The method of manufacturing an absorbent body according to any one of claims 1 to 9, wherein the slit is formed in a linear shape extending in a transport direction of the absorbent body precursor.
- 前記吸収体前駆体又は前記吸収体には、吸収性物品の***部対向部に配される部位に、該吸収性物品の縦方向に沿う縦スリットが複数、分散した状態に形成されている、請求項1~10の何れか1項に記載の吸収体の製造方法。 In the absorbent body precursor or the absorbent body, a plurality of longitudinal slits along the longitudinal direction of the absorbent article are formed in a dispersed state at a portion disposed in the excretory part facing portion of the absorbent article. The method for producing an absorbent body according to any one of claims 1 to 10.
- 吸収体前駆体又は前記吸収体に、吸収性物品の縦方向に沿う縦スリットを、吸収性物品の縦方向及び横方向の両方向に分散した状態に形成する、請求項1~10の何れか1項に記載の吸収体の製造方法。 11. The absorbent body precursor or the absorbent body, wherein longitudinal slits along the longitudinal direction of the absorbent article are formed in a state dispersed in both the longitudinal direction and the lateral direction of the absorbent article. The manufacturing method of the absorber as described in a term.
- 前記スリット形成工程において、吸収性物品の縦方向に沿う縦スリットを、前記吸収体前駆体をその厚み方向に向けて切り込むことで形成し、該縦スリットは、前記吸収体を構成する吸収性シートの積層構造を貫通している、請求項1~12の何れか1項に記載の吸収体の製造方法。 In the slit forming step, a longitudinal slit along the longitudinal direction of the absorbent article is formed by cutting the absorbent body precursor in the thickness direction, and the longitudinal slit forms the absorbent sheet. The method for producing an absorbent body according to any one of claims 1 to 12, which penetrates the laminated structure.
- 前記吸収体前駆体又は前記吸収体に、吸収性物品の縦方向に沿う複数の縦スリットが形成されており、各縦スリットは個々に独立しており、隣り合う縦スリットどうしの間には非スリット部が位置しており、縦スリットは、その周囲の全域が非スリット部によって囲まれている、請求項1~13の何れか1項に記載の吸収体の製造方法。 A plurality of longitudinal slits along the longitudinal direction of the absorbent article are formed in the absorber precursor or the absorber, each longitudinal slit is individually independent, and there is no non-interval between adjacent longitudinal slits. The method for manufacturing an absorbent body according to any one of claims 1 to 13, wherein the slit portion is located, and the entire periphery of the vertical slit is surrounded by the non-slit portion.
- 前記吸収体は、吸収性物品の***部対向部より後方に位置する後方部に、吸収性物品の縦方向と交差する方向へ長手方向を有するように延びる複数本の後方スリットを有する、請求項1~13の何れか1項に記載の吸収体の製造方法。 The absorbent body has a plurality of rear slits extending in the rear part located behind the excretory part facing part of the absorbent article so as to have a longitudinal direction in a direction intersecting the longitudinal direction of the absorbent article. 14. The method for producing an absorbent body according to any one of 1 to 13.
- 前記後方スリットは、スリットの長手方向の中央部の位置が、該長手方向の両端部の位置よりも吸収性物品の前方部側に向かって凸に湾曲した平面視形状を有している、請求項15に記載の吸収体の製造方法。 The rear slit has a plan view shape in which the position of the center portion in the longitudinal direction of the slit is curved more convexly toward the front portion side of the absorbent article than the positions of both end portions in the longitudinal direction. Item 16. A method for producing an absorbent body according to Item 15.
- 前記後方スリットは、吸収性物品の縦方向Xに間隔を開けて複数本形成されている、請求項15又は16に記載の吸収体の製造方法。 The method of manufacturing an absorbent body according to claim 15 or 16, wherein a plurality of the rear slits are formed at intervals in the longitudinal direction X of the absorbent article.
- 前記切断刃は、その最も先端の位置に、2つの斜辺によって形成される第1先端角を有し、その最も先端の位置から若干基部寄りの位置に、各該斜辺に連なる別の斜辺によって形成される第2先端角を有し、該第1先端角は、該第2先端角よりも大きくなっている、請求項1~16の何れか1項に記載の吸収体の製造方法。 The cutting blade has a first tip angle formed by two hypotenuses at the most tip position, and is formed by another hypotenuse connected to each hypotenuse at a position slightly closer to the base from the tip end position. The method for manufacturing an absorbent body according to any one of claims 1 to 16, wherein the first tip angle is larger than the second tip angle.
- 前記第1先端角は40度以上100度以下である、請求項18に記載の吸収体の製造方法。 The method for manufacturing an absorbent body according to claim 18, wherein the first tip angle is not less than 40 degrees and not more than 100 degrees.
- 前記第2先端角は、前記第1先端角よりも小さく、且つ30度以上90度以下である、請求項18又は19に記載の吸収体の製造方法。 The method for manufacturing an absorbent body according to claim 18 or 19, wherein the second tip angle is smaller than the first tip angle and not less than 30 degrees and not more than 90 degrees.
- 前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面、スリット形成時に前記アンビルロール側に位置していた面を第2面としたときに、
前記屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、前記第1面側に湾曲させるロールを備えるものであるか、前記第2面側に湾曲させるロールを備えるものであるか、又は、前記第1面側に湾曲させるロールと前記第2面側に湾曲させるロールとの両者を備えるものである、請求項1~20の何れか1項に記載の吸収体の製造方法。 In the precursor with slit, which is the absorber precursor that has formed the slit, the surface located on the cutter roll side during slit formation is the first surface, and the surface located on the anvil roll side during slit formation is the second surface And when
Whether the bending means includes, as the winding portion, a roll that curves the precursor with slit to the first surface side or a roll that curves the second surface side. The method for producing an absorbent body according to any one of claims 1 to 20, further comprising both a roll that is bent toward the first surface and a roll that is bent toward the second surface. - 前記スリットを形成した吸収体前駆体であるスリット付前駆体における、スリット形成時に前記カッターロール側に位置した面を第1面、スリット形成時に前記アンビルロール側に位置していた面を第2面としたときに、
前記屈曲加工手段は、前記巻き掛け部として、前記スリット付前駆体を、前記第1面及び前記第2面のうちの一方の面側に湾曲させる2つのロールと、他方の面側に湾曲させる1つのロールの合計3本以上のロールを備えている、請求項1~21の何れか1項に記載の吸収体の製造方法。 In the precursor with slit, which is the absorber precursor that has formed the slit, the surface located on the cutter roll side during slit formation is the first surface, and the surface located on the anvil roll side during slit formation is the second surface And when
The bending means, as the winding portion, causes the precursor with slit to bend to two rolls for bending one of the first surface and the second surface and to the other surface. The method for producing an absorbent body according to any one of claims 1 to 21, comprising a total of three or more rolls of one roll. - 前記スリットは、前記吸収体前駆体の搬送方向における長さが2mm以上100mm以下である、請求項1~22の何れか1項に記載の吸収体の製造方法。 The method for manufacturing an absorber according to any one of claims 1 to 22, wherein the slit has a length in the transport direction of the absorber precursor of 2 mm or more and 100 mm or less.
- 前記巻き掛け部の曲率半径は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、請求項1~23の何れか1項に記載の吸収体の製造方法。 The method for manufacturing an absorbent body according to any one of claims 1 to 23, wherein a radius of curvature of the winding portion is not more than four times the length of the slit in the transport direction of the absorbent body precursor.
- 前記巻き掛け部の各ロールの軸間距離は、前記スリットの前記吸収体前駆体の搬送方向における長さの4倍以下である、請求項1~24の何れか1項に記載の吸収体の製造方法。 The distance between the axes of each roll of the winding portion is not more than four times the length of the slit in the conveyance direction of the absorber precursor. Production method.
- 前記吸収体は、吸収性物品の吸収体である、請求項1~25の何れか1項に記載の吸収体の製造方法。 The method for producing an absorbent body according to any one of claims 1 to 25, wherein the absorbent body is an absorbent body of an absorbent article.
- 吸収性物品は、生理用ナプキン、使い捨ておむつ、失禁パッド又はパンティライナである、請求項26に記載の吸収体の製造方法。 The absorbent article according to claim 26, wherein the absorbent article is a sanitary napkin, a disposable diaper, an incontinence pad or a panty liner.
- 前記スリット形成工程においては、前記吸収体の上下に配される、吸収性物品の表面シート及び裏面シートに前記スリットを形成しない、請求項26又は27に記載の吸収体の製造方法。 28. The method for manufacturing an absorbent body according to claim 26 or 27, wherein, in the slit forming step, the slit is not formed on a top sheet and a back sheet of an absorbent article disposed above and below the absorbent body.
- 液保持性の吸収体並びに該吸収体の肌対向面側に配置された表面シート及び該吸収体の非肌対向面側に配置された裏面シートを具備する吸収性物品の製造方法であって、
前記吸収体を、請求項1~28の何れか1項に記載の方法により製造する、吸収性物品の製造方法。 A method for producing an absorbent article comprising a liquid-retaining absorbent body, a top sheet disposed on the skin facing surface side of the absorbent body, and a back sheet disposed on the non-skin facing surface side of the absorbent body,
A method for producing an absorbent article, wherein the absorbent body is produced by the method according to any one of claims 1 to 28.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201580008713.5A CN106029025B (en) | 2014-02-28 | 2015-01-27 | The manufacturing method of absorber |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2014-039997 | 2014-02-28 | ||
JP2014039997A JP6359292B2 (en) | 2014-02-28 | 2014-02-28 | Absorber manufacturing method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015129367A1 true WO2015129367A1 (en) | 2015-09-03 |
Family
ID=54008693
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/052149 WO2015129367A1 (en) | 2014-02-28 | 2015-01-27 | Production method for absorbent body |
Country Status (3)
Country | Link |
---|---|
JP (1) | JP6359292B2 (en) |
CN (1) | CN106029025B (en) |
WO (1) | WO2015129367A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108778207A (en) * | 2016-06-03 | 2018-11-09 | 花王株式会社 | Physiology absorbent commodity |
WO2020159979A1 (en) * | 2019-01-28 | 2020-08-06 | Attends Healthcare Products, Inc. | Absorbent articles having absorbent laminates and high-bulk, low shear topsheets |
US11672710B2 (en) | 2014-02-28 | 2023-06-13 | Attends Healthcare Products, Inc. | Absorbent article with multi-layer folded absorbent core |
US11744748B2 (en) | 2018-05-28 | 2023-09-05 | Attends Healthcare Products, Inc. | Dryness layer laminate for absorbent articles |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6990517B2 (en) * | 2017-03-24 | 2022-01-12 | 花王株式会社 | Absorber |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003521947A (en) * | 1998-02-20 | 2003-07-22 | ザ、プロクター、エンド、ギャンブル、カンパニー | Method for forming a split or particulate absorbent material |
JP2010142367A (en) * | 2008-12-17 | 2010-07-01 | Kao Corp | Absorbent article |
JP2012115390A (en) * | 2010-11-30 | 2012-06-21 | Daio Paper Corp | Absorptive article |
JP2013126527A (en) * | 2011-11-15 | 2013-06-27 | Kao Corp | Method for producing underpants-type wearing article |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0844062A1 (en) * | 1996-11-21 | 1998-05-27 | The Procter & Gamble Company | Thermal joining of webs |
US7351297B2 (en) * | 2004-09-21 | 2008-04-01 | Tredegar Film Products Corp. | Composite elastic web |
JP4683957B2 (en) * | 2005-02-25 | 2011-05-18 | 花王株式会社 | Non-woven |
-
2014
- 2014-02-28 JP JP2014039997A patent/JP6359292B2/en active Active
-
2015
- 2015-01-27 CN CN201580008713.5A patent/CN106029025B/en active Active
- 2015-01-27 WO PCT/JP2015/052149 patent/WO2015129367A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003521947A (en) * | 1998-02-20 | 2003-07-22 | ザ、プロクター、エンド、ギャンブル、カンパニー | Method for forming a split or particulate absorbent material |
JP2010142367A (en) * | 2008-12-17 | 2010-07-01 | Kao Corp | Absorbent article |
JP2012115390A (en) * | 2010-11-30 | 2012-06-21 | Daio Paper Corp | Absorptive article |
JP2013126527A (en) * | 2011-11-15 | 2013-06-27 | Kao Corp | Method for producing underpants-type wearing article |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11672710B2 (en) | 2014-02-28 | 2023-06-13 | Attends Healthcare Products, Inc. | Absorbent article with multi-layer folded absorbent core |
CN108778207A (en) * | 2016-06-03 | 2018-11-09 | 花王株式会社 | Physiology absorbent commodity |
US11744748B2 (en) | 2018-05-28 | 2023-09-05 | Attends Healthcare Products, Inc. | Dryness layer laminate for absorbent articles |
WO2020159979A1 (en) * | 2019-01-28 | 2020-08-06 | Attends Healthcare Products, Inc. | Absorbent articles having absorbent laminates and high-bulk, low shear topsheets |
Also Published As
Publication number | Publication date |
---|---|
JP6359292B2 (en) | 2018-07-18 |
JP2015164476A (en) | 2015-09-17 |
CN106029025A (en) | 2016-10-12 |
CN106029025B (en) | 2019-09-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5019906B2 (en) | Absorber manufacturing method | |
WO2015129367A1 (en) | Production method for absorbent body | |
WO2008072675A1 (en) | Absorbent article | |
JPH02291857A (en) | Preparation of constitutional member for wearing article | |
JP6137589B2 (en) | Absorbent articles | |
JP5996448B2 (en) | Absorbent article manufacturing apparatus and absorbent article manufacturing method | |
JP2007130274A (en) | Absorptive article | |
JP6205244B2 (en) | Disposable diapers | |
JP5508060B2 (en) | Method for manufacturing absorbent article | |
JP3746706B2 (en) | Continuous production method for absorbent laminates | |
JP6138903B1 (en) | Method for manufacturing absorbent article | |
JP6422128B2 (en) | Absorbent article and manufacturing method thereof | |
JP5822380B2 (en) | Absorber manufacturing method | |
JP4953735B2 (en) | Absorbent article and manufacturing method thereof | |
JP6073539B1 (en) | Method for manufacturing absorbent article | |
JPWO2014208364A1 (en) | Absorbent article with wing and manufacturing method thereof | |
JP4508861B2 (en) | Sanitary napkin | |
JP6356980B2 (en) | Absorbent manufacturing method and manufacturing apparatus | |
JP6737106B2 (en) | Absorbent article and manufacturing method thereof | |
WO2015194375A1 (en) | Method for manufacturing absorbent article | |
JP2018117866A (en) | Absorbent article | |
JP4953734B2 (en) | Absorbent article and manufacturing method thereof | |
JP6591279B2 (en) | Absorbent article, packaging structure for absorbent article, and method for manufacturing absorbent article packaging structure | |
CN109561996B (en) | Absorbent body and method for manufacturing absorbent article | |
JP2022069288A (en) | Manufacturing method of absorber |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15755181 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15755181 Country of ref document: EP Kind code of ref document: A1 |