WO2023063143A1 - 使い捨て着用物品の吸収性コアの製造装置および製造方法 - Google Patents

使い捨て着用物品の吸収性コアの製造装置および製造方法 Download PDF

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Publication number
WO2023063143A1
WO2023063143A1 PCT/JP2022/036954 JP2022036954W WO2023063143A1 WO 2023063143 A1 WO2023063143 A1 WO 2023063143A1 JP 2022036954 W JP2022036954 W JP 2022036954W WO 2023063143 A1 WO2023063143 A1 WO 2023063143A1
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WO
WIPO (PCT)
Prior art keywords
drum
transfer
peripheral speed
fibers
area
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/036954
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English (en)
French (fr)
Japanese (ja)
Inventor
洋佑 岩村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zuiko Corp
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Zuiko Corp
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 Zuiko Corp filed Critical Zuiko Corp
Priority to JP2023554410A priority Critical patent/JP7610026B2/ja
Priority to US18/700,077 priority patent/US20250114251A1/en
Priority to EP22880839.0A priority patent/EP4410253B1/en
Priority to CN202280068280.2A priority patent/CN118076326A/zh
Publication of WO2023063143A1 publication Critical patent/WO2023063143A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • A61F13/15772—Control
    • 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
    • A61F13/15626—Making fibrous pads without 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15634—Making fibrous pads between 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
    • A61F13/15617—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
    • A61F13/15747—Folding; Pleating; Coiling; Stacking; Packaging
    • 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
    • A61F13/15764—Transferring, feeding or handling devices; Drives
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/736—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres
    • 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
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15934—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven
    • A61F2013/15943—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for making non-woven by air-laid technique

Definitions

  • the present invention relates to an apparatus and method for manufacturing absorbent cores for disposable wearing articles.
  • Patent Document 2 a thick core is fitted into a hole formed in a thin core to produce an absorbent core having a portion with a large thickness
  • Patent No. 2,541,558 (Fig. 1) WO 2020/209006 A1 (front page)
  • the thicker portion has a smaller area than the thinner portion. Therefore, the stacking area on the drum corresponding to the portion having a large thickness is small, and the flow rate of the air flowing toward the drum is also small. In this case, in the defibrator that pulverizes pulp to produce fibers, the low flow rate causes an unnecessary temperature rise, and there is a problem that the fibers are likely to burn (burn).
  • the portion having a large thickness is partially provided with respect to the entire absorbent core. Therefore, the fiber stacking area corresponding to this portion is provided intermittently and in a small size on the outer peripheral surface of the entire drum, and the ratio of the area to the entire drum is small, and uneven fiber stacking is likely to occur. As a result, unevenness tends to occur in the absorbent core.
  • the device of the present invention is an absorbent core C manufacturing device for manufacturing an absorbent core C by combining a first core portion C1 and a second core portion C2 in a disposable wearing article, a supply device 3 that has a defibrator 33 that produces fibrous pulverized fibers F and that supplies the fibers F; a first drum 1 having a first area ⁇ 1 for stacking the fibers F by adsorbing them on the outer peripheral portion 10, and for stacking the first core portion C1 in the first area ⁇ 1; A plurality of second areas ⁇ 2 smaller than the first area ⁇ 1 are formed by adsorbing and stacking the fibers F on the outer peripheral portion 20, and the second core portion C2 stacked in each of the second areas ⁇ 2 is formed as described above.
  • a second drum 2 for successively transferring to the first drum 1;
  • the second drum 2 is rotated at a high first peripheral speed V1, and after the transfer, during the non-transfer until the next transfer, the A variable speed driving device 5 for rotating the second drum 2 at a second peripheral speed V2 lower than the first peripheral speed V1 is provided.
  • the method of the present invention is a method for manufacturing an absorbent core C in a disposable wearing article, in which an absorbent core C is manufactured by combining a first core portion C1 and a second core portion C2, a supply device 3 that has a defibrator 33 that produces fibrous pulverized fibers F and that supplies the fibers F; a first drum 1 having a first area ⁇ 1 for stacking the fibers F by adsorbing them on the outer peripheral portion 10, and for stacking the first core portion C1 in the first area ⁇ 1; A second core portion C2 having a plurality of second areas ⁇ 2 smaller than the first area ⁇ 1 by adsorbing and stacking the fibers F on the outer peripheral portion 20, and stacked in each of the second areas ⁇ 2, Using a second drum 2 that sequentially transfers to the first drum 1, a step of stacking the first core portion C1 in the first area ⁇ 1; a step of stacking the second core portion C2 in the second area ⁇ 2; a step of
  • the second drum that forms the second core portion rotates at the low second peripheral speed V2 during non-transfer. Therefore, the transferred second core portion has a larger pitch on the first drum, and is in a so-called re-pitched state. Therefore, the second areas can be densely formed on the second drum.
  • the second area for the second core portion can be densely provided in the second drum, and therefore the flow rate of the air is increased, and the temperature rise in the defibrator 33 can be suppressed. As a result, burnt deposits are less likely to occur on the fibers.
  • the second areas are densely provided on the second drum, unevenness in stacking the fibers is less likely to occur.
  • FIG. 1A is a conceptual side view showing Example 1 of the present manufacturing apparatus and method
  • FIG. 1B is a developed view showing the area of the second drum
  • FIG. 1C is a perspective view of the absorbent core
  • 2A and 2B are conceptual side views showing two drums in transfer and non-transfer states, respectively.
  • FIG. 3A is a conceptual side view showing Example 2 of the present manufacturing apparatus and method
  • FIG. 3B is a developed view showing the area of the first drum
  • FIG. 3C is a plan view of the absorbent core.
  • 4A and 4B are conceptual side views showing two drums in transfer and non-transfer states, respectively.
  • 5(a) and 5(b) are velocity diagrams of the first drum and the second drum, respectively.
  • the speed change driving device 5 comprises a servomotor 50 for rotating the second drum 2 and a control device 51 for controlling the rotation of the servomotor 50 . In this case, it becomes easier to control the periodic shift.
  • control device 51 controls the servomotor 50 so that the high first peripheral speed V1 of the second drum 2 during transfer becomes the same speed as the peripheral speed of the first drum 1. Control rotation.
  • the second drum 2 is preferably rotated such that the high first peripheral speed V1 of the second drum 2 during transfer is the same as the peripheral speed of the first drum 1. be.
  • peripheral speeds of the two drums during transfer are equal to each other, so that problems such as deformation of the second core portion during transfer are less likely to occur.
  • the high-speed first peripheral velocity V1 during the transfer is a constant peripheral velocity
  • the rotation of the second drum 2 is decelerated from the first peripheral speed V1 to the low second peripheral speed V2 after the transfer, and before the next transfer, the low second speed so as to accelerate the rotation of the second drum 2 from the peripheral speed V2 to the high first peripheral speed V1,
  • the controller 51 controls rotation of the servo motor 50 .
  • the high first peripheral velocity V1 during the transfer be a constant peripheral velocity
  • the rotation of the second drum 2 is decelerated from the first peripheral speed V1 to the low second peripheral speed V2 after the transfer, and before the next transfer, the second peripheral speed at the low speed is reduced.
  • the rotation of the servomotor 50 is controlled so that the rotation of the second drum 2 is accelerated from the speed V2 to the high first peripheral speed V1.
  • the second drum is accelerated and decelerated during non-transfer, and the second drum rotates at a constant speed during transfer. , the second drum can be cyclically shifted.
  • the supply device 3 has a single defibrator 33, a first duct portion 31 for pneumatically conveying the fibers F produced by the single defibrator 33 to the first drum 1; A second duct portion 32 for pneumatically conveying the fibers F produced by the single defibrator 33 to the second drum 2 may be provided.
  • the step of gas-conveying the fibers F produced by the single defibrator 33 to the first drum 1 through the first duct portion 31; A step of pneumatically conveying the fibers F generated by the single defibrator 33 to the second drum 2 through the second duct portion 32 may be further included.
  • Absorbent cores manufactured by this manufacturing apparatus are used, for example, as cores for incontinence pads in addition to disposable pants and diapers, and may have, for example, an hourglass shape in plan view.
  • FIG. 1A, 2A and 2B show Example 1.
  • the manufacturing apparatus comprises a feeding device 3, first and second drums 1, 2, and the like.
  • the supply device 3 includes a tubular case 30 and a defibrator 33 .
  • the defibrator 33 defibrates (pulverizes) the pulp supplied from the upstream into fibers to generate fluff pulp (fibers).
  • Fluff pulp fills the case 30 and passes through the first and second ducts 31 and 32 to set the suction chambers (not shown) of the first and second drums 1 and 2 to negative pressure.
  • the fibers are stacked on the outer peripheral portions 10, 20 of the first and second drums 1, 2.
  • Such defibration and stacking are well-known techniques, and are disclosed, for example, in JP2009-112438A.
  • particles of a polymer compound having a high absorption capacity called SAP superabsorbent polymer particles
  • the first and second drums 1, 2 are generally cylindrical and formed of a plurality of segments (not shown) in a known manner.
  • the first and second drums 1 and 2 are provided corresponding to the first and second duct portions 31 and 32, respectively.
  • These drums 1 and 2 rotate continuously in the circumferential direction R to direct the fibers F supplied from the supply device 3 from the outer peripheral portions 10 and 20 of the drums 1 and 2 toward the inner suction chamber (not shown).
  • the fibers F are continuously piled up on the outer peripheral portions 10, 20 of the predetermined first or second areas ⁇ 1, ⁇ 2.
  • the suction chamber is arranged in a predetermined suction section T1 in the circumferential direction R of the drums 1 and 2, and is connected to a negative pressure source (not shown) so that the pressure inside the suction chamber becomes negative.
  • Each suction chamber is arranged close to the inner peripheral side of the outer peripheral portions 10, 20 of the drums 1, 2. Therefore, in the suction section T1, the fibers are stacked on the drums 1, 2 and held by suction. be.
  • each drum 1, 2 is provided with a non-suction section T2 in which the outer peripheral portions 10, 20 of the drum do not face the suction chamber.
  • the first area ⁇ 1 of the first drum 1 is continuous in the circumferential direction R of the first drum 1 in this example.
  • the second areas ⁇ 2 of the second drum 2 are intermittently provided at regular intervals in the circumferential direction R of the second drum 2 .
  • Each of the areas ⁇ 1 and ⁇ 2 usually serves as a fiber stacking concave portion.
  • the basic and specific structures of these recesses and the drum are well known and disclosed in, for example, Japanese Patent Nos. 2,541,558, 4,312,112 and 3,153,060.
  • the second area ⁇ 2 is provided so as to be included in the first area ⁇ 1.
  • the intermittently provided second areas ⁇ 2 are smaller in both the circumferential direction R and the width direction D than the continuously provided first areas ⁇ 1, and are included.
  • the region of the outer peripheral portion 20 other than the second area ⁇ 2 is an inhibition area ⁇ 4 where the stacking of the fibers F is inhibited.
  • the first area ⁇ 1 may have, for example, an hourglass shape and be discontinuous when developed on a plane.
  • a thin portion (an example of a first core portion) C1 shown in FIG. 1C is formed in the first area ⁇ 1 shown in FIG. 1B.
  • a thick portion (an example of a second core portion) C2 shown in FIG. 1C is formed in the second area ⁇ 2 shown in FIG. 1B.
  • the first and second duct portions 31 and 32 of FIG. 1A are connected to the case 30 of the feeding device 3, and feed the fibers F from the feeding device 3 to the outer peripheral portion 10 of the first drum 1 and the outer peripheral portion 20 of the second drum 2, respectively. lead. Parts of the outer peripheral portions 10 and 20 of the first and second drums 1 and 2 face the ends of the first and second duct portions 31 and 32, respectively.
  • At least part of the suction section T1 of each drum 10, 20 faces the opening at the end of each duct portion 31, 32.
  • Domes 31D and 32D extending along the drum may be formed at the end of each duct portion.
  • the thick portion C2 is bulkier and thicker than the thin portion C1. Such a difference in thickness between the thin portion C1 and the thick portion C2 can be obtained, for example, by varying the magnitude of the negative pressure in the suction chamber and the suction period.
  • the first drum 1 and the second drum 2 are in contact with each other at the delivery point P via the thick portion C2.
  • the first drum 1 is set in the suction section T1
  • the second drum 2 is set in the non-suction section T2. Even if the first drum 1 and the second drum 2 are not in contact with each other through the thick portion C2, they are close enough to pass the thick portion C2 from the second drum 2 to the first drum 1.
  • a first web W1 (carrier web) for transporting the absorbent core C formed of the thin portion C1 and the thick portion C2 is transported.
  • 1 transport section 41 is provided downstream of the first conveying section 41.
  • a second conveying section 42 for conveying the second web W2 sandwiching the absorbent core C with the first web W1. Note that the first conveying section 41 conveys the first web W1 along the first drum 1 so that the absorbent core C is sandwiched between the first web W1 and the first drum 1 .
  • each of the conveying units 41 and 42 may be provided with unwinding rollers for unwinding the web and anvil rolls for conveying and cutting the absorbent core C sandwiched between a pair of webs. good.
  • the web may be water absorbent and water permeable.
  • the transfer point P described above is provided between the first duct portion 31 and the second duct portion 32, the first drum 1 and the second drum 2 are in contact with each other via the thick portion C2, and the second area ⁇ 2 is formed. This is the point at which the stacked thick portion C2 is transferred from the second drum 2 to the area on the first drum 1 where the thin portion C1 is not formed.
  • the supply device 3 comprises a single defibrator 33 .
  • the first duct portion 31 pneumatically conveys the fibers F produced by the single defibrator 33 to the first drum 1 .
  • the second duct portion 32 pneumatically transports the fibers F generated by the single defibrator 33 to the second drum 2 .
  • the variable speed drive device 5 includes a servomotor 50 that rotates the second drum 2 and a control device 51 that controls the rotation of the servomotor 50. As shown in FIG. The controller 51 controls the rotation of the servomotor 50 so that the high first peripheral speed V1 of the second drum 2 during transfer becomes the same speed as the peripheral speed of the first drum 1 .
  • the variable speed driving device 5 controls the rotation of the servomotor 50 so that the high first peripheral velocity V1 at the time of transfer (during transfer) in FIG. 5B becomes a constant peripheral velocity.
  • the controller 51 in FIG. 2B controls the rotation of the servomotor 50 so as to decelerate from the first peripheral speed V1 to the low second peripheral speed V2 after the transfer at the time of non-transfer shown in FIG. 5B. And, before the next transfer, it is accelerated from the low second peripheral velocity V2 to the high first peripheral velocity V1.
  • the peripheral speed of the first drum 1 in FIG. 5(a) may be high and maintained at a constant peripheral speed V1.
  • some of the fibers F produced by a single defibrator 33 are pneumatically conveyed to the outer peripheral portion 10 of the first drum 1 through the first duct portion 31 .
  • Another part of the fibers F generated by the single defibrator 33 is gas-conveyed to the outer peripheral portion 20 of the second drum 2 through the second duct portion 32 .
  • the fibers F produced by the supply device 3 are piled up in the second area ⁇ 2, and thus are deposited on the outer peripheral portion 20 of the second drum 2.
  • Thick portions C2 are stacked at regular intervals. The thick portion C2 is conveyed to the transfer point P while being attracted to the second area ⁇ 2 of the second drum 2. As shown in FIG.
  • the thick portion C2 is transferred from the second drum 2 onto the first area ⁇ 1 of the first drum 1 . That is, at the transfer point P, the second drum 2 is set in the non-suction section T2, while the first drum 1 is set in the suction section T1. Therefore, the thick portion C2 on the second drum 2 is transferred to a part of the first area ⁇ 1 of the first drum 1 and arranged.
  • the thick portion C2 is arranged (transferred) by being attracted to a part of the first area ⁇ 1 while the fibers F are not stacked in the first area ⁇ 1.
  • the second drum 2 rotates at a high first peripheral speed V1 during transfer (during transfer). That is, the second drum 2 is rotated such that the first peripheral speed V1 of the second drum 2 is the same as the peripheral speed of the first drum 1 . On the other hand, the second drum 2 is rotated at a second peripheral speed V2 which is lower than the first peripheral speed V1 during non-transfer.
  • the second drum 2 maintains a constant peripheral speed from the high first peripheral speed V1 during transfer (during transfer).
  • the rotation of the servo motor 50 is controlled so as to be decelerated to the peripheral speed V2 and accelerated from the low second peripheral speed V2 to the high first peripheral speed V1 before the next transfer.
  • the second drum 2 shown in FIGS. 2A and 2B is cyclically shifted, so that the interval S between the adjacent thick portions C2 on the second drum 2 becomes the interval after the transfer onto the first drum 1.
  • Spread as indicated by L That is, the thick portions C2 on the second drum 2 can be arranged with a small pitch. Therefore, the second areas ⁇ 2 can be densely arranged on the second drum 2 .
  • the fibers F generated by the supply device 3 are stacked in the first area ⁇ 1.
  • a continuous thin portion C1 is generated around the thick portion C2.
  • some of the fibers F may also be piled up in the thick portion C2 of the first area ⁇ 1.
  • the absorbent core C in which the thin portion C1 is continuous along the outer peripheral portion 10 of the first drum 1 is formed in the step of forming the thin portion C1.
  • the absorbent core C shown in FIG. 1C is formed on the outer peripheral portion 10 of the first drum 1 .
  • the formed absorbent core C is transferred and conveyed onto the first web W1 guided by the first conveying portion 41 in the non-sucking section T2.
  • the absorbent core C is sandwiched between the second web W2 and the first web W1 conveyed by the second conveying section 42, the absorbent core C is cut into individual wearing article units.
  • the surface of the thick portion C2 is formed to project from the surface of the thin portion C1.
  • FIG. 3A-4B show Example 2.
  • FIG. Regarding the second embodiment the differences from the first embodiment will be mainly described.
  • the first drum 1 is provided with an inhibition area ⁇ 3 in which stacking of the fibers F is inhibited in addition to the first area ⁇ 1.
  • Inhibition area ⁇ 3 may be set such that the porosity of the mesh of outer peripheral portion 10 is small so that the suction due to the negative pressure is weakened.
  • the first drum 1 and the second drum 2 are in contact with each other at the transfer point P under the following conditions.
  • the thin portion C1 is stacked on the first drum 1 in the first area ⁇ 1 other than the inhibition area ⁇ 3 where the stacking of the fibers F is inhibited, and the fibers F are not stacked in the inhibition area ⁇ 3.
  • Both drums come into contact with each other at the transfer point P so that the thick portion C2 stacked on the second drum 2 is transferred from the second drum 2 to the inhibition area ⁇ 3 of the first drum 1 .
  • the thin portion C1 having a lower basis weight than the thick portion C2 is placed on the first drum 1 in areas other than the inhibition area ⁇ 3 where the stacking of the fibers F is inhibited in the first area ⁇ 1. Form. At this time, the fibers F may not be stacked in the inhibition area ⁇ 3.
  • the second drum 2 stacks the fibers F from the supply device 3 on the second area ⁇ 2 to form the thick portion C2.
  • the thick portion C2 is formed on the second drum 2 so as to match the planar shape of the inhibition area ⁇ 3 of the first drum 1 .
  • the thick portion C2 on the second drum 2 is arranged in the inhibition area ⁇ 3 of the first drum 1, and the thick portion C2 is fitted to the thin portion C1.
  • the absorbent core C shown in FIG. 3C is produced, and the continuous absorbent core C sandwiched between the pair of webs W1 and W2 is produced in the same manner as in Example 1 described above.
  • the second drum 2 when the second drum 2 is transferring each thick portion C2 (during transfer), the second drum 2 is rotated at the high first peripheral speed V1. After transfer, the second drum 2 rotates at a second peripheral speed V2 lower than the first peripheral speed V1 during non-transfer until the next transfer.
  • the pitches of the thick portions C2 are small on the second drum 2 and large on the first drum 1 . That is, the pitch of the second areas ⁇ 2 of the second drum 2 can be small and dense.
  • peripheral speed of the first drum 1 is constant in each of the above-described embodiments, the peripheral speed may be decelerated or accelerated after the transfer and before the next transfer, that is, during non-transfer.
  • the absorbent core may be formed by forming a thin, uniform first core section with a first drum and overlaying the first core section with a discontinuous second core section formed with a second drum.
  • the absorbent core may contain a sap.
  • the absorbent cores C may be discontinuously formed on the drum in the circumferential direction R. Accordingly, such changes and modifications are intended to be within the scope of the invention as defined by the appended claims.
  • the present invention can be used to manufacture absorbent cores for disposable wearing articles.
  • First drum 10 Peripheral part 2: Second drum 20: Peripheral part 3: Supply device 31: First duct part 32: Second duct part 31D, 32D: Dome 33: Defiberization machine 41: First conveying part 42: Second conveying part 5: Variable speed drive Device 50: Servo motor 51: Control device C: Absorbent core C1: Thin portion (an example of the first core portion) C2: Thick portion (an example of the second core portion) D: Width direction P: Delivery point F: Fiber R: Circumferential direction S, L: interval T1: suction section T2: non-suction section ⁇ 1: first area ⁇ 2: second area ⁇ 3: inhibition area ⁇ 4: inhibition area

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)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2022/036954 2021-10-15 2022-10-03 使い捨て着用物品の吸収性コアの製造装置および製造方法 Ceased WO2023063143A1 (ja)

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JP2023554410A JP7610026B2 (ja) 2021-10-15 2022-10-03 使い捨て着用物品の吸収性コアの製造装置および製造方法
US18/700,077 US20250114251A1 (en) 2021-10-15 2022-10-03 Apparatus and method for manufacturing absorbent core for disposable wearable articles
EP22880839.0A EP4410253B1 (en) 2021-10-15 2022-10-03 Apparatus and method for manufacturing absorbent core for disposable wearable articles
CN202280068280.2A CN118076326A (zh) 2021-10-15 2022-10-03 一次性穿着物品的吸收性芯的制造装置以及制造方法

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JP2541558B2 (ja) 1986-05-28 1996-10-09 ザ、プロクタ−、エンド、ギャンブル、カンパニ− 複数の要素を有するエアレイドファイバ・ウェブの形成装置および形成方法
JP3153060B2 (ja) 1993-11-29 2001-04-03 花王株式会社 繊維の積繊方法及び積繊装置
JP2002516191A (ja) * 1998-05-28 2002-06-04 エススィーエイ ハイジーン プロダクツ エイビー 空気吹込繊維吸収材コアを形成するための方法および装置
JP2009112438A (ja) 2007-11-05 2009-05-28 Kao Corp 吸収性物品及びその製造方法
JP4312112B2 (ja) 2004-07-01 2009-08-12 花王株式会社 積繊体製造装置
JP2010227543A (ja) * 2009-03-02 2010-10-14 Uni Charm Corp 吸収体成型転写機構及び吸収性物品の製造方法
WO2020209006A1 (ja) * 2019-04-10 2020-10-15 株式会社瑞光 使い捨て着用物品の吸収性コアの製造装置および製造方法

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US9668923B2 (en) * 2012-05-18 2017-06-06 Kimberly-Clark Worldwide, Inc. Apparatus for attaching discrete web segments
US10441475B2 (en) * 2016-06-01 2019-10-15 Zuiko Corporation Placement device, placement system and placement method

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Publication number Priority date Publication date Assignee Title
JP2541558B2 (ja) 1986-05-28 1996-10-09 ザ、プロクタ−、エンド、ギャンブル、カンパニ− 複数の要素を有するエアレイドファイバ・ウェブの形成装置および形成方法
JP3153060B2 (ja) 1993-11-29 2001-04-03 花王株式会社 繊維の積繊方法及び積繊装置
JP2002516191A (ja) * 1998-05-28 2002-06-04 エススィーエイ ハイジーン プロダクツ エイビー 空気吹込繊維吸収材コアを形成するための方法および装置
JP4312112B2 (ja) 2004-07-01 2009-08-12 花王株式会社 積繊体製造装置
JP2009112438A (ja) 2007-11-05 2009-05-28 Kao Corp 吸収性物品及びその製造方法
JP2010227543A (ja) * 2009-03-02 2010-10-14 Uni Charm Corp 吸収体成型転写機構及び吸収性物品の製造方法
WO2020209006A1 (ja) * 2019-04-10 2020-10-15 株式会社瑞光 使い捨て着用物品の吸収性コアの製造装置および製造方法

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EP4410253A4 (en) 2024-12-25
JP7610026B2 (ja) 2025-01-07
EP4410253A1 (en) 2024-08-07
CN118076326A (zh) 2024-05-24
EP4410253C0 (en) 2025-07-16
EP4410253B1 (en) 2025-07-16
US20250114251A1 (en) 2025-04-10

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