WO2015093303A1 - 吸収体の製造方法 - Google Patents

吸収体の製造方法 Download PDF

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Publication number
WO2015093303A1
WO2015093303A1 PCT/JP2014/082120 JP2014082120W WO2015093303A1 WO 2015093303 A1 WO2015093303 A1 WO 2015093303A1 JP 2014082120 W JP2014082120 W JP 2014082120W WO 2015093303 A1 WO2015093303 A1 WO 2015093303A1
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WO
WIPO (PCT)
Prior art keywords
width
edge
coating
absorber
manufacturing
Prior art date
Application number
PCT/JP2014/082120
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English (en)
French (fr)
Japanese (ja)
Inventor
浩志 丸山
康泰 木崎
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201480064637.5A priority Critical patent/CN105792784B/zh
Publication of WO2015093303A1 publication Critical patent/WO2015093303A1/ja

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    • 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
    • A61F13/1565—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres by depositing continuous layers of fibrous material between webs, e.g. wrapping layers of fibrous material
    • 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
    • A61F13/539—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 characterised by the connection of the absorbent layers with each other or with the outer layers
    • 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
    • A61F2013/5349—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 being a tissue-wrapped core

Definitions

  • the present invention relates to a method for producing an absorbent for use in absorbent articles such as disposable diapers, sanitary napkins, and incontinence pads.
  • an absorber used for an absorbent article such as a disposable diaper
  • an absorbent core made of a fiber material such as pulp fiber or a water-absorbing polymer
  • a covering sheet such as a covering sheet.
  • a concave portion on the outer peripheral surface thereof has a suction part and a non-suction part, and the depth of the non-suction part is made shallower than the depth of the suction part. It is listed.
  • Patent Document 2 describes a technique in which a hot melt adhesive is interposed between thin paper and an absorbent mat in which fibrous materials are accumulated to heat-treat the absorbent mat.
  • the present invention relates to a method for producing an absorbent body in which an absorbent core having grooves at least in the product longitudinal direction is wrapped with a covering sheet, wherein an adhesive is applied to the inner surface of the covering sheet surrounding the absorbent core. Wrapping the adhesive core to overlap the both sides of the covering sheet and wrap the absorbent core, and the both sides are overlapped and joined on the surface side of the absorbent core where the grooves are arranged A packaging step, and in the adhesive coating step, an outer edge of the adhesive coating region from the edge on the side of the both sides where the edge is in contact with the absorbent core A manufacturing method of an absorbent body, wherein the adhesive is applied while detecting the position of the edge and calculating the width of the non-coating region so that the width of the non-coating region is kept constant. provide.
  • (A) is the top view seen from the 1st surface side
  • (B) was seen from the 2nd surface side. It is a plan view
  • (C) is an enlarged cross-sectional view showing a cross-section taken along the line CC of (A).
  • (A) is the expanded sectional view of the absorber which wraps the absorptive core of FIG. 1 with a covering sheet
  • (B) is the top view which showed the packaging process which wraps an absorptive core with a covering sheet.
  • (A) is explanatory drawing which showed typically the coating process of the hot-melt-type adhesive agent to the both sides in FIG. 3
  • (B) is an enlarged plan view of a sensor area
  • (C) is a coating sheet. It is a figure which shows the state in which the edge of is in the center position (appropriate reference position) of a sensor area
  • (D) is the inner side of the width direction rather than the center position (appropriate reference position) of a sensor sheet
  • (E) is a figure which shows the state which the edge of a coating sheet exists in the width direction outer side rather than the center position (appropriate reference position) of a sensor area
  • It is sectional drawing which showed the cross section of the recessed part in the rotating drum outer peripheral surface used for the manufacturing apparatus of FIG. It is the flowchart which showed the process of test
  • Some absorbent bodies use an absorbent core having grooves at least in the longitudinal direction from the viewpoint of air permeability and softness when incorporated in absorbent articles such as diapers.
  • the groove portion serves as an air passage for the absorber and serves as a flexible portion of the absorber.
  • the absorbent core having a groove portion is excellent in flexibility, but the integrity is weakened during liquid absorption and may be partially separated. If the absorbent core breaks, liquid leakage may occur from it. Therefore, it is necessary that the absorbent core is firmly fixed to the covering sheet while maintaining flexibility.
  • an adhesive is applied to the covering sheet to wrap the absorbent core, and both sides of the covering sheet are overlapped and joined on the surface side having the groove portion of the absorbent core There is.
  • non-coating regions dry edges
  • the absorbent core is not fixed to the covering sheet at that portion. If the width of the non-coating region is too wide, the absorbing portion between the grooves cannot be fixed, and it may be partially separated during liquid absorption.
  • the width of the non-coating region is too narrow, the adhesive protrudes during coating, which may hinder continuous production.
  • the absorber is stably continuously manufactured with a suitable width of the non-coating region.
  • the position of the covering sheet has been adjusted using a meandering correction machine that keeps the conveyance of the long covering sheet at a fixed position.
  • this is position adjustment on the upstream side of the adhesive coating process. Therefore, more reliable management of the non-coating region is desired in the adhesive coating process on the downstream side.
  • the present invention grasps the width of the non-coated region of the covering sheet in a timely and accurate manner in the continuous production of the absorbent body, ensures the fixing property of the absorbent core to the covering sheet, and maintains the shape.
  • the present invention relates to a method for producing an absorbent body, which can stably produce an absorbent body having excellent properties.
  • the width of the non-coated area of the covering sheet is accurately grasped in a timely manner, and the fixing property of the absorbent core to the covering sheet is ensured.
  • An absorber excellent in shape retention can be stably produced.
  • the absorbent body obtained by the production method of the present invention has a function of being incorporated in an absorbent article and absorbing and retaining excretory fluids.
  • the absorbent article widely includes various forms that are worn along the wearer's crotch along the abdomen and dorsal side to absorb excretory fluids, such as disposable diapers, sanitary napkins, incontinence pads, Includes panty liners.
  • the absorbent body 10 is formed by wrapping a liquid-retaining absorbent core in a hydrophilic covering sheet.
  • the absorptive core is a fiber assembly obtained by stacking fiber materials as described later.
  • FIG. 1 shows an example of an absorbent core.
  • the absorptive core 1 shown in FIG. 1 has a vertically long planar shape, and its outer shape is constricted at the central portion in the longitudinal direction, and the width expands toward both front and rear ends. As shown in FIG.
  • the absorbent core 1 has a first surface 1A and a second surface 1B, and a plurality of grooves (vertical grooves) 11 are formed in the first surface 1A in the longitudinal direction. ing. Further, a plurality of groove portions (lateral groove portions) 12 are formed in the width direction orthogonal to the longitudinal direction. These groove portions 11 and 12 are concave portions that are recessed in the thickness direction from the surface of the first surface 1A of the absorbent core 1, and are opposite to the first surface 1A as shown in FIGS. 1 (B) and (C). It does not penetrate the second surface 1B side of the surface.
  • a portion of the absorbent core 1 that is surrounded by the grooves 11 and 12 and protrudes toward the first surface 1A is called a protruding absorption portion 15 and is located on the second surface 1B side where the grooves 11 and 12 remain without penetrating. This portion is referred to as a thin skin absorbing portion 16.
  • the first surface 1A of the absorbent core 1 is an uneven surface, and the second surface 1B is a flat surface.
  • the groove portions 11 and 12 in the absorbent core 1 serve as ventilation paths in the absorbent body, and have an effect of reducing stuffiness when the absorbent core 1 is incorporated and attached to the absorbent article.
  • the groove 11 is effective in preventing stuffiness because moisture that tends to stay in the crotch is moved along the longitudinal direction and discharged to the outside.
  • the grooves 11 and 12 serve as a liquid diffusion path.
  • the groove 11 diffuses the liquid in the longitudinal direction and enables liquid absorption in a wide area of the absorbent core 1, which is effective in preventing side leakage of the liquid.
  • the absorbent core 1 can be softly deformed with the grooves 11 and 12 as flexible shafts.
  • the groove 11 in the longitudinal direction enables deformation that can cope with pressure from the outside in the width direction in the crotch.
  • the groove 12 in the width direction enables deformation that can fit complex undulations of the body when the absorbent core 1 is incorporated into an absorbent article and is stretched from the crotch toward the abdomen and back.
  • the groove part which the absorptive core 1 has is not limited to the thing of this embodiment mentioned above, What is necessary is just to have a groove part of a longitudinal direction at least.
  • the number and length of the grooves can be arbitrarily set.
  • the groove is not limited to a linear shape as shown in FIG. 1, and may be a curved shape as long as it extends in the longitudinal direction.
  • the arrangement of the grooves may not be parallel to the center axis in the width direction connecting both ends of the absorbent core 1 in the longitudinal direction. For example, there may be one formed so as to have an inclination angle left and right from the central portion toward both front and rear end portions with respect to the central axis.
  • the groove portion is not limited to the non-penetrating one as in the present embodiment, and may be one that penetrates in the thickness direction from the first surface 1A to the second surface 1B without leaving the thin skin absorbing portion 16.
  • the external shape of the absorptive core 1 is not limited to the shape shown in FIG. 1, A rectangular shape, an ellipse shape, etc. may be sufficient.
  • the absorbent core 1 is wrapped and wrapped by a single cover sheet 2 so that both side portions 21 and 22 of the cover sheet 2 overlap each other.
  • the second surface 1B side of the absorbent core 1 is covered with the central portion 28 in the width direction (X direction) of the covering sheet 2, and both side portions 21 and 22 extending outward in the width direction are wound up to It is folded back alternately on the first surface 1A side.
  • Both side portions 21 and 22 are overlapped and joined on the first surface (uneven surface) 1A side where the groove portion of the absorbent core 1 is arranged.
  • the laminated part 29 of the both side parts 21 and 22 of the coating sheet 2 is arrange
  • one side portion 21 of the covering sheet 2 is folded inward from the other side portion 22, and an edge thereof is in contact with the first surface 1 ⁇ / b> A having the groove portion of the absorbent core 1. Since the covering sheet 2 covers the entire area of the first surface, the second surface, and the side surfaces of the absorbent core 1 as described above, the covering sheet 2 has a width that is at least twice the length of the absorbent core 1 in the width direction (X direction). Have.
  • the side portions 21 and 22 of the covering sheet 2 are portions that are folded back from the second surface side 1B of the absorbent core 1 toward the first surface side 1A in this packaging form.
  • the center part 28 is a part which covers the 2nd surface side 1B of the absorptive core 1, and is a part except the side parts 21 and 22 in the width direction of a coating sheet. Note that in the cross-sectional view of FIG. 2A, the constituent members are shown with an interval in order to easily identify the constituent members. Therefore, in practice, each component is in contact or bonded.
  • the absorbent body 10 of the present embodiment includes an absorbent core 1 having a first surface 1A that is an uneven surface and a second surface 1B that is a flat surface.
  • the absorbent body 10 is a surface where the both side portions 21 and 22 of the covering sheet 2 do not overlap, and the surface on which the second surface 1B of the absorbent core 1 is disposed is incorporated into the absorbent article as a skin contact surface. Thereby, the joint of the covering sheet 2 becomes the non-skin contact surface side and does not hinder the permeation of the liquid. Further, when the thin skin absorbing portion 16 is on the skin contact surface side, the liquid can be diffused in the groove portion on the first surface side 1A away from the skin while receiving the liquid widely on the flat second surface 1B of the absorbent core 1.
  • the liquid return to the skin side is suppressed, and the liquid absorption performance is excellent.
  • positioning to the absorbent article of the absorber 10 it is not limited to the said form.
  • the surface where the side portions 21 and 22 do not overlap may be the non-skin contact surface, and the surface where the side portions 21 and 22 overlap may be the skin contact surface.
  • the skin contact surface is a surface directed toward the wearer's skin when the absorbent article is worn, and the non-skin contact surface is a surface directed toward the opposite clothing side.
  • the cover sheet 2 is coated with an adhesive for fixing the absorbent core 1 to the inner surface 2 ⁇ / b> A enclosing the absorbent core 1.
  • an adhesive for fixing the absorbent core 1 to the inner surface 2 ⁇ / b> A enclosing the absorbent core 1.
  • a hot melt type adhesive is used, and the side portions 21 and 22 and the central portion 28 are separately applied.
  • an adhesive is applied in a spiral coating pattern with a low coating density so as not to impede liquid permeability on the second surface 1B side of the absorbent core 1 serving as a liquid receiving surface.
  • the adhesive of the central portion 28 is also referred to as an adhesive 28S.
  • the adhesive is applied in a stripe-like coating pattern having a dense coating density (hereinafter, the adhesives on both side portions 21 and 22 are applied). Also referred to as adhesives 21S and 22S, respectively).
  • the both sides 21 and 22 are provided with adhesive non-coating regions (dry edge regions) 25 and 26 with a predetermined width H1 from the respective end edges 23 and 24 from the viewpoint of preventing the adhesive from protruding. These non-coating regions 25 and 26 constitute a part of the above-described laminated portion 29.
  • the non-coating region 25 of the side portion 21 entering the inside is not bonded to the absorbent core 1 while being in contact with the first surface (uneven surface) 1 ⁇ / b> A side where the groove portion of the absorbent core 1 is arranged. is there.
  • the width H1 of the inner non-coating region 25 is preferably a moderately suppressed length for fixing the protruding absorbing portion 15 between the groove portions. That is, the width H ⁇ b> 1 is preferably within a distance from the vertical groove portion 11 to another adjacent vertical groove portion 11. Specifically, it is preferable that the length H2 in the width direction of the longitudinal groove portion 11 of the absorbent core 1 and the length H3 in the width direction of the protruding absorption portion 15 (H2 + H3) be shorter (H1 ⁇ H2 + H3), and the protrusion. It is more preferable that the absorption portion 15 is shorter than the length H3 in the width direction (H1 ⁇ H3).
  • the width H1 of the non-coating region 25 is shorter than the length H3 in the width direction of the protrusion absorbing portion 15 (H1 ⁇ H3), so that even if the shape and arrangement of the longitudinal groove portion 11 are various modes, the protrusion absorption The part 15 and the covering sheet 2 can be joined. That is, by appropriately suppressing the width H ⁇ b> 1 of the non-coating region 25, the protruding absorbing portion 15 that overlaps the laminated portion 29 can be fixed with the adhesives 21 ⁇ / b> S and 22 ⁇ / b> S of the side portion 21 and the side portion 22.
  • a preferable numerical value of the width H1 of the non-coating region 25 is determined by the lengths of the longitudinal groove portion 11 and the protruding absorbent portion 15, and varies depending on the size and use of the absorbent body and the absorbent article to be incorporated.
  • the length H2 of the longitudinal groove 11 is 2 mm and the length H3 of the protruding absorber 15 is 10 mm
  • it is preferably 11 mm or less, more preferably 10 mm or less, and further 8 mm or less.
  • a protrusion part can be fixed reliably.
  • the lower limit is preferably 1 mm or more, more preferably 3 mm or more, and still more preferably 5 mm or more. Thereby, it can process stably, without protruding at the time of adhesive agent 22S coating.
  • the coating pattern of the adhesive in the central portion 28 is not limited to the spiral shape of the present embodiment, and various patterns having a low coating density that does not impair liquid permeability can be employed. For example, there are dot shape, omega ( ⁇ ) character shape, and meander shape.
  • the adhesive coating pattern on both side portions 21 and 22 is not limited to the stripe shape of the present embodiment, and various coating patterns having a dense coating density can be employed. For example, there is a surface shape.
  • FIG. 3 a coating part 50 for applying a hot-melt adhesive to the covering sheet 2, and a stacking part 60 for stacking pulp fibers and a water-absorbing polymer to form the absorbent core 1.
  • the absorbent core 1 is placed on the covering sheet 2 and has a packaging portion 70 that wraps the covering sheet 2 by folding both sides. Furthermore, it has the cutting part 80 cut
  • a pressurizing part and other components may be optionally included.
  • the coating unit 50 includes the side coating device 51 that applies the adhesive to the both side portions 21 and 22 in the width direction of the covering sheet 2 and the central coating device that applies the adhesive to the central portion 28. 58.
  • a hot melt gun can be used as each coating apparatus.
  • the adhesive coating is continuously applied to the side portions 21 and 22 and the central portion 28 with respect to the long strip-shaped covering sheet 2 continuously drawn out from the raw roll (not shown).
  • the central coating device 58 has a coating head 59 that performs pattern control by an air flow and applies an adhesive in a non-contact state. Thereby, as above-mentioned, an adhesive agent can be apply
  • the side coating apparatus 51 includes coating heads 53 and 54 that are brought into contact with both sides of the covering sheet 2 and coat the adhesive closely. Further, an edge detection sensor is provided on the coating head 53 disposed on the side portion 21 disposed on the inner side when folded back in a subsequent process, on both sides 21 and 22 of the covering sheet 2 via a support portion 55.
  • the part 31 is joined and integrated. In this embodiment, from the viewpoint of shape retention of the absorbent core, the edge detection sensor 31 is installed only on the side portion 21 that is folded inward.
  • the edge detection sensor unit 31 is a width sensor that detects a region having a predetermined width.
  • the edge detection sensor part 31 is installed in the coating head 53 so as to detect the edge 23 of the side part 21. With this installation, the hot melt application position and the center position of the edge detection sensor unit 31 are determined, and accurate non-coating area (dry edge) management that cannot be realized by a conventional meandering correction device can be performed. This point will be described in detail below.
  • the edge detection sensor unit 31 includes a sensor region 32 having a predetermined length S1 extending in the width direction of the cover sheet 2 as shown in FIG.
  • the sensor region 32 is disposed so as to overlap the edge 23 of the side portion 21 of the cover sheet 2 and detects the position of the edge 23. Thereby, the position fluctuation
  • region 32 (refer FIG.4 (B)).
  • the center position 321 of the length S1 of the sensor region 32 is set as the appropriate reference position ST of the edge 23 (see FIG. 4B).
  • the width direction is a direction (CD; Cross Direction) orthogonal to the machine flow direction (MD; Machine Direction). This coincides with the width direction (X direction) orthogonal to the longitudinal direction (Y direction) when the absorbent body 10 is formed.
  • the coating head 53 integrated with the edge detection sensor unit 31 is disposed inward in the width direction of the covering sheet 2 with respect to the edge detection center unit 31. Thereby, the application position of the adhesive to the side part 21 is determined.
  • the adhesive coating head 53 is appropriate.
  • the arrangement position is determined. In this state, the length in the width direction (CD) between the edge 23 of the coating sheet 2 and the coating outer edge 53A in the width direction of the coating head 53 is set as an appropriate setting width HT of the non-coating region 25. The setting is made (see FIG. 4C).
  • a control unit 40 is connected to the edge detection sensor unit 31.
  • the control unit 40 receives the detected position information of the edge 23 together with the detection time information 23T, and calculates the width H1 of the non-coating area as needed.
  • the calculated value is stored in time series in the control unit 40 together with the detection time information. For example, when position information SN of the edge 23 of the cover sheet 2 is detected on the inner side of the center position 321 of the sensor region 32 included in the edge detection sensor unit 31 (see FIG. 4D), the position information SN Is received by the control unit 40 together with the detection time information 23T.
  • the control unit 40 determines as follows.
  • the deviation width is calculated as a plus difference “+ SW”. That is, it is determined that the edge 23 is away from the coating outer edge 53 ⁇ / b> A of the coating head 53.
  • the stacking unit 60 is a component that forms the absorbent core 1, and includes a defibrating device 61 that defibrates a pulp sheet fed from a pulp raw roll (not shown) to obtain pulp fibers, and a defibrating device 61. It has a duct 62 serving as a path for carrying the drawn pulp fiber in an air stream, a water-absorbing polymer supply unit 63 provided in the duct, and a rotating drum 64 as a fiber stacker.
  • the rotating drum 64 has a plurality of recesses 641 for depositing raw materials (fiber materials) of the absorbent core 1 such as pulp fibers and water-absorbing polymers on the outer peripheral surface thereof (see FIG. 5). As shown in FIG.
  • the concave portion 641 is formed by laminating and fixing a porous plate 643 and a pattern forming plate 644 in a through-hole of a cylindrical frame body 642 made of a metal rigid body.
  • a pattern forming plate 644 On the pattern forming plate 644, crosspieces 645 for forming grooves are arranged in a pattern.
  • the crosspiece 645 has a height shorter than the depth of the concave portion 641 and is arranged close to the frame body 642 side.
  • An intake fan (not shown) is connected to the space B, and the space B is maintained at a negative pressure by driving the intake fan. Thereby, an air flow is generated in the duct 62.
  • the space D is maintained at a positive pressure by a pressurizing means (not shown).
  • the space C may be maintained at a negative pressure in order to convey the absorbent core 1 in which the fiber material is deposited while being stably held. In that case, the space C is preferably maintained at a lower level of negative pressure than the space B.
  • the bottom of the recess may be cleaned by maintaining the pressure equal to the atmospheric pressure or by air blowing (not shown) from the inside of the drum.
  • the fiber stacking unit 60 when the fiber material is supplied to the rotating drum 64 while riding in the air current in the duct 62, the fiber material is deposited in the rotating recess 641 so as to avoid the crosspiece 645.
  • the absorptive core 1 which consists of a groove part, the protrusion absorption part 15, and the thin skin absorption part 16 is formed.
  • the part of the crosspiece 645 of the concave portion 641 becomes a groove, and the fiber material is deposited in a space without the crosspiece 645 to form the protruding absorption section 15.
  • the formed absorbent core 1 is released at the position of the space D and transferred to the cover sheet 2 that is conveyed. This mold release and transfer are performed by positive pressure in the space D and suction from the vacuum conveyor 71 side described later.
  • the packaging unit 70 includes a vacuum conveyor 71 corresponding to the space D in the rotary drum 64 of the stacking unit 60, and a folding means 72 that folds the side portions 21 and 22 of the covering sheet 2 in order. Thereby, both sides are folded and folded as shown in FIG. 2B, and the entire circumference in the width direction of the absorbent core 1 is covered with the covering sheet 2 and packaged. At this time, the 2nd surface 1B of the absorptive core 1 is joined and fixed with the center part 28 of the coating sheet 2 with the rough
  • both side portions 21 and 22 overlap on the first surface 1A of the absorbent core 1 to form a laminated portion 29.
  • the adhesive 21 ⁇ / b> S and the adhesive 22 ⁇ / b> S are overlapped in the thickness direction and the both side portions 21 and 22 are joined, thereby sealing the absorbent core 1.
  • the cutting unit 80 cuts the covering sheet 2 with a cutting means (not shown) such as a cutter roll at a portion where the absorbent core 1 is not provided, and has a length corresponding to one absorbent body 10.
  • the manufacturing apparatus 100 described above is used.
  • the manufacturing method includes an adhesive coating process 201 (side coating process 202 and a central coating process 203) in the coating part 50, a stacking process 204 in the stacking part 60, and a packaging part. 70 has a packaging step 205.
  • the absorber of predetermined length is obtained by the cutting process 206 in the cutting part 80 after that.
  • the rolls 101A to 101E are rotated to continuously feed the long strip-shaped covering sheet 2 from an upstream raw roll (not shown).
  • the coating of the adhesive described above in the coating unit 50 is continuously performed on the covered cover sheet 2.
  • the side coating process 202 and the central coating process 203 are performed in this order.
  • the order of both coating processes is not necessarily limited to this, For example, the order of the center coating process 203 and the side part coating process 202 may be sufficient.
  • the coating heads 53 and 54 of the coating part 51 are brought into contact with both side parts 21 and 22 in the width direction of the covering sheet 2 to perform dense coating.
  • coating is performed with a stripe pattern.
  • the edge detection sensor part 31 integrated with one coating head 53 via the support part 55 continues to detect the position of the edge 23 of the one side part 21 of the covering sheet 2. That is, in the side part coating process 202, the application of the adhesive to the both side parts 21 and 22 of the covering sheet 2 and the detection of the position of the edge 23 of the side part 21 are continued simultaneously.
  • the control unit 40 connected to the edge detection sensor unit 31 continues to calculate the width H1 of the non-coating region 25 in the side part 21.
  • the calculated width H1 and detection time information 23T at which the position of the edge 23 is detected are stored in time series. This point will be described in more detail with reference to FIG.
  • the center position 321 in the width direction in the sensor region 32 of the edge detection sensor unit 31 is set in advance as the appropriate reference position ST of the edge 23 of the cover sheet 2 (step S1). Further, an appropriate setting width HT of the non-coating region 25 is set from the appropriate reference position ST (Step S1). If necessary, an upper limit value ⁇ and a lower limit value ⁇ of an allowable range of the deviation width from the appropriate setting width HT are set (step S1). Further, in the manufacturing apparatus 100, the conveyance speed SP of the cover sheet 2 and the distance SK from the edge detection sensor unit 31 to the position of the absorbent body discharge sorting process (not shown) taken as a unit after cutting are set. (Step S1).
  • This distance SK is basic information for setting how many sheets after the defect is detected should be discharged.
  • the appropriate setting width HT is determined from the viewpoints of securing the fixing force of the absorbent core 1 and preventing the adhesive from protruding. As described above, it is preferable to set the distance within a distance from the vertical groove portion 11 of the absorbent core 1 to another adjacent vertical groove portion 11. Specifically, it is preferable to set the width (H1 ⁇ H2 + H3) shorter than the sum of the length H2 in the width direction of the longitudinal groove portion 11 of the absorbent core 1 and the length H3 in the width direction of the protruding absorption portion 15.
  • the width (H1 ⁇ H3) shorter than the length H3 in the width direction of the protrusion absorbing portion 15.
  • the position of the outer edge 53A is set.
  • the width from the center position 321 of the sensor region 321 (that is, the appropriate reference position ST of the edge) to the coating outer edge 53A in the width direction of the coating head 53 is set.
  • the edge detection sensor unit 31 detects the position of the edge 23 of the side portion 21 of the covering sheet 2 in the sensor region 32
  • the position information is transmitted to the control unit 40 together with the detection time information 23T.
  • This information is received and stored by the control unit 40 (step S2).
  • the width H1 of the non-coating area calculated in this way is stored in time series together with the detection time information 23T (step S3).
  • the control unit 40 determines a deviation (H1 ⁇ HT or H1> HT) from the appropriate setting width, and determines that the width H1 of the non-coating region where the deviation has occurred is defective.
  • the upper limit ⁇ is preferably set within a distance from the vertical groove 11 of the absorbent core 1 to another adjacent vertical groove 11. Further, the control unit detects the detection time information 23T corresponding to the width H1 of the non-coating area determined to be defective, the conveying speed SP of the covering sheet 2 set in advance, and the discharge detection sorting step of the absorber from the edge detection sensor unit 31 ( Based on the distance SK up to (not shown), it is possible to determine how many sheets should be discharged after detecting a defect and to identify the defective absorber 10.
  • the width H1 of the non-coating region 23 can be inspected simultaneously with the application of the adhesive from the detected and calculated numerical values, and the suitability can be monitored timely.
  • the width H1 of the non-coating area calculated by the control unit 40 can be displayed on another monitor and confirmed. Thereby, it is useful for quality control in manufacture of an absorber and an absorbent article incorporating the same.
  • the defect signal (alarm) 40X may be displayed on the monitor or an alarm sound may be generated.
  • a display for specifying the absorber 10 determined to be defective may be displayed on the monitor.
  • the position of the cover sheet 2 may be returned to the proper position by the adjusting means by feedback control from the deviation width ( ⁇ SN, + SW).
  • the position adjusting means (not shown) of the covering sheet 2 installed in the previous process of the HM coating process controls the position of the covering sheet 2 according to the detection value of the end detection sensor unit 31 by feedback control. By doing so, the width of the dry edge can always be controlled within the standard.
  • the adhesives 21S and 22S are continuously applied to the both side portions 21 and 22 of the covering sheet 2 while the width H1 of the non-coating region 23 of the side portion 21 is constantly monitored.
  • the coating head 59 of the coating part 58 is brought into a non-contact state with respect to the central part 28 of the covering sheet 2, and the adhesive 28S is applied in a sparse pattern.
  • coating is performed with a spiral pattern.
  • the covering sheet 2 reaches the position of the vacuum conveyor 71 of the packaging unit 70.
  • the fiber stacking process 204 in the fiber stacking section 60 described above is performed separately. That is, the absorptive core 1 which has the groove part, the protrusion absorption part, and the thin skin absorption part by which the predetermined pattern arrangement was carried out is produced continuously.
  • a packaging process 205 in the packaging unit 70 is executed.
  • the absorbent core 1 created in the fiber stacking process 204 is transferred to the central portion 28 of the covering sheet 2.
  • the 2nd surface 1B of the absorptive core 1 is joined and fixed to the center part 28 of the coating sheet 2 with the adhesive agent 28S.
  • the folding means 72 is continuously folded and joined so that both side portions of the covering sheet 2 overlap the first surface 1A side where the groove portion of the absorbent core 1 is located, thereby forming the laminated portion 29 of the both side portions 21 and 22. Is done.
  • the adhesives 21S and 22S on the both side portions 21 and 22 are joined to each other in the thickness direction, and the absorbent core 1 is thereby sealed. Further, the first surface 1 ⁇ / b> A of the absorbent core 1 is bonded and fixed to the entire side portions 21 and 22 including the laminated portion 29 by the adhesives 21 and 22. In this state, it is conveyed to the position of the cutting part 80 by the belt conveyor 81, and the cutting process 206 is performed. That is, what wrapped the absorptive core 1 with the coating sheet 2 is cut
  • the absorber obtained by the method for producing an absorbent body of the present invention is preferably used as an absorbent body of an absorbent article as described above.
  • the absorbent article typically includes a basic structure in which the absorbent body is disposed and bonded between a liquid-permeable top sheet and a liquid-impermeable back sheet. Further, another member may be combined.
  • the absorbent core 1 and the covering sheet 2 constituting the absorbent body 10 are used without particular limitation.
  • the fiber material constituting the absorbent core 1 pulp fibers such as defibrated pulp, short fibers of cellulosic fibers such as rayon fibers and cotton fibers, and short fibers of synthetic fibers such as polyethylene are used. These fibers can be used alone or in combination of two or more.
  • a water-absorbing polymer may be introduced into the duct 4 as a raw material for the absorber 3.
  • a fibrous water-absorbing polymer can be used alone or in combination with the fiber material.
  • a deodorant, an antibacterial agent, etc. can be supplied with a fiber material etc. as needed.
  • the material of the covering sheet 2 include thin paper (tissue paper) and hydrophilic nonwoven fabric.
  • the present invention further discloses the following method for producing an absorbent body, an absorbent body obtained by this production method, and an absorbent article using the absorbent body with respect to the above-described embodiments and embodiments.
  • a method for producing an absorbent body in which an absorbent core in which grooves are disposed at least in a product longitudinal direction is wrapped with a covering sheet, An adhesive coating step of applying an adhesive to the inner surface of the covering sheet that wraps the absorbent core, and folding the covering sheet so as to overlap both sides of the covering sheet, wrapping the absorbent core, and absorbing the both sides And a packaging step of overlapping and bonding on the surface side where the groove portion of the conductive core is arranged, In the adhesive coating step, the non-coating region from the edge to the outer end of the adhesive coating region at the side of the both sides where the edge abuts the absorbent core.
  • the manufacturing method of the absorber which coats the adhesive while detecting the position of the edge and calculating the width of the non-coating region so that the width is kept constant.
  • ⁇ 2> The method for producing an absorbent body according to ⁇ 1>, wherein the grooves of the absorbent core are also disposed in the product width direction.
  • the manufacturing method of the absorber as described in said ⁇ 1> or ⁇ 2> which divides
  • ⁇ 4> The method for producing an absorbent body according to ⁇ 3>, wherein the hot melt adhesive is applied in a planar or striped pattern on both side portions.
  • ⁇ 5> The method according to ⁇ 3> or ⁇ 4>, wherein one side of the absorbent core is fixed with a hot-melt adhesive applied to the central portion, and the other surface is fixed with the hot-melt adhesive on both sides.
  • Method for manufacturing the absorber ⁇ 6> The method for producing an absorbent body according to any one of ⁇ 1> to ⁇ 5>, wherein the covering sheet is folded back so that the hot-melt adhesives coated on both side portions overlap each other.
  • ⁇ 7> The width of the non-coating region from the edge of the covering sheet to the outer end of the adhesive coating region is extended from the longitudinal groove portion of the absorbent core to another adjacent longitudinal groove portion.
  • ⁇ 1> to ⁇ 6> The manufacturing method of the absorber as described in any one of ⁇ 6>.
  • ⁇ 8> Any of the above ⁇ 1> to ⁇ 7>, which outputs a warning signal when the width of the non-coating area calculated by detecting the position of the edge of the covering sheet is outside the set range
  • ⁇ 9> ⁇ 1> to ⁇ 8> for controlling the traveling position of the covering sheet so that the width of the non-coating area calculated by detecting the position of the edge of the covering sheet is maintained within a set range.
  • the defective absorber is identified and excluded from ⁇ 1> to ⁇ 9
  • the position of the edge of the covering sheet is detected using an apparatus in which an edge detection sensor unit and an adhesive coating unit are integrated. Any one of ⁇ 1> to ⁇ 10> The manufacturing method of the absorber of description.
  • ⁇ 12> The method for manufacturing an absorbent body according to ⁇ 11>, wherein the edge detection sensor unit is a width sensor that detects a region having a predetermined width.
  • the edge detection sensor unit is a width sensor that detects a region having a predetermined width.
  • ⁇ 13> In the above ⁇ 11> or ⁇ 12>, which determines an appropriate arrangement position of the coating head of the adhesive in a state where the edge of the covering sheet overlaps the center position of the sensor region of the edge detection sensor unit.
  • ⁇ 14> The method for manufacturing an absorbent body according to any one of ⁇ 11> to ⁇ 13>, wherein a control unit is connected to the edge detection sensor unit.
  • ⁇ 15> The method for manufacturing an absorbent body according to ⁇ 14>, wherein the control unit receives position information of the detected edge together with detection time information, and calculates the width of the non-coated region as needed.
  • the control unit receives position information of the detected edge together with detection time information, and calculates the width of the non-coated region as needed.
  • the calculated value is stored in time series together with detection time information in the control unit.
  • the control unit receives the position information SN together with the detection time information.
  • the negative difference “ ⁇ SN” is added to the appropriate setting width HT of the non-coating region, and the non-coating region width H1 at the time of detection is calculated and stored as ⁇ 17>.
  • ⁇ 21> The absorbent core according to any one of ⁇ 1> to ⁇ 20>, wherein the absorbent core has a first surface and a second surface, and a plurality of longitudinal grooves are formed in the first surface in a longitudinal direction.
  • the longitudinal groove portion is a recess recessed in the thickness direction from the surface of the first surface of the absorbent core 1, and does not penetrate the second surface 1B side opposite to the first surface 1A.
  • ⁇ 23> The method for manufacturing an absorbent body according to ⁇ 21> or ⁇ 22>, wherein the first surface of the absorbent core is an uneven surface, and the second surface is a flat surface.
  • ⁇ 24> The method for manufacturing an absorbent body according to ⁇ 21>, wherein the longitudinal groove portion penetrates in the thickness direction from the first surface 1A to the second surface 1B.
  • ⁇ 25> The absorbent core according to any one of ⁇ 1> to ⁇ 24>, wherein the absorbent core is wrapped and wrapped by a single cover sheet so that both side portions of the cover sheet overlap.
  • the absorbent body includes an absorbent core having a first surface that is an uneven surface and a second surface that is a flat surface, and the absorbent body overlaps both sides of the covering sheet.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Manufacturing & Machinery (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2014/082120 2013-12-18 2014-12-04 吸収体の製造方法 WO2015093303A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3335681A4 (en) * 2015-08-12 2019-04-03 Sumitomo Seika Chemicals Co. Ltd. DEVICE FOR PREPARING A SUCTIONABLE BODY

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201213266D0 (en) * 2012-07-26 2012-09-05 Univ Gent Membranes, azeotropic & catalytic components
CN110179584A (zh) * 2019-04-16 2019-08-30 广东中科鑫雁科技有限公司 卫生用品芯体复合机联线包覆折叠装箱机组与生产工艺

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009155061A (ja) * 2007-12-27 2009-07-16 Kao Corp シートの接合方法
JP2010136900A (ja) * 2008-12-11 2010-06-24 Kao Corp 吸収性物品及びその製造方法
JP2012147997A (ja) * 2011-01-20 2012-08-09 Unicharm Corp 吸収体の厚さを薄くする装置、及び方法
JP2012166165A (ja) * 2011-02-16 2012-09-06 Kao Corp 吸収性物品の製造方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4790233B2 (ja) * 2004-06-28 2011-10-12 大王製紙株式会社 吸収体
KR101283921B1 (ko) * 2005-03-23 2013-07-16 가오 가부시키가이샤 흡수성 물품
JP5822381B2 (ja) * 2010-06-10 2015-11-24 花王株式会社 吸収体の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009155061A (ja) * 2007-12-27 2009-07-16 Kao Corp シートの接合方法
JP2010136900A (ja) * 2008-12-11 2010-06-24 Kao Corp 吸収性物品及びその製造方法
JP2012147997A (ja) * 2011-01-20 2012-08-09 Unicharm Corp 吸収体の厚さを薄くする装置、及び方法
JP2012166165A (ja) * 2011-02-16 2012-09-06 Kao Corp 吸収性物品の製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3335681A4 (en) * 2015-08-12 2019-04-03 Sumitomo Seika Chemicals Co. Ltd. DEVICE FOR PREPARING A SUCTIONABLE BODY
US11376167B2 (en) 2015-08-12 2022-07-05 Sumitomo Seika Chemicals Co., Ltd. Apparatus for manufacturing absorbent body

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TWI634877B (zh) 2018-09-11
JP5946817B2 (ja) 2016-07-06
CN105792784A (zh) 2016-07-20
CN105792784B (zh) 2019-07-23
JP2015116338A (ja) 2015-06-25
TW201526882A (zh) 2015-07-16

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