WO2020209006A1 - 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
WO2020209006A1
WO2020209006A1 PCT/JP2020/011312 JP2020011312W WO2020209006A1 WO 2020209006 A1 WO2020209006 A1 WO 2020209006A1 JP 2020011312 W JP2020011312 W JP 2020011312W WO 2020209006 A1 WO2020209006 A1 WO 2020209006A1
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WO
WIPO (PCT)
Prior art keywords
drum
area
fibers
thick portion
thin
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/JP2020/011312
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English (en)
French (fr)
Japanese (ja)
Inventor
梅林　豊志
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
Original Assignee
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 US17/600,583 priority Critical patent/US11850129B2/en
Priority to CN202080020507.7A priority patent/CN113556995B/zh
Priority to EP20788234.1A priority patent/EP3954350B1/en
Priority to JP2021513532A priority patent/JP7348272B2/ja
Publication of WO2020209006A1 publication Critical patent/WO2020209006A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • 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
    • A61F2013/15926—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for vacuum forming
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2501/00—Wearing apparel
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2509/00—Medical; Hygiene
    • D10B2509/02—Bandages, dressings or absorbent pads
    • D10B2509/026—Absorbent pads; Tampons; Laundry; Towels

Definitions

  • the present invention relates to a manufacturing apparatus and a manufacturing method for an absorbent core (core) of a disposable worn article.
  • an absorbent article such as a diaper
  • two fiber drums drums
  • one absorbent drum is used as a first absorbent layer.
  • a second absorption layer having a smaller area than the first absorption layer is formed by the other stacking drum, and by superimposing these two absorption layers, absorption having a part having a large thickness is formed.
  • Patent No. 2,541,558 (Fig. 1)
  • the two absorbing layers are simply overlapped, and the positions of the two absorbing layers are likely to shift during transportation of the absorbent article or when the absorbent article is used.
  • An object of the present invention is to provide a method and an apparatus for manufacturing an absorbent core having portions having different thicknesses, which does not cause deviation of the portions having different thicknesses.
  • the first method for producing an absorbent core is A supply device 3 for supplying the crushed fiber F and A first drum 1 provided with a first area (area) ⁇ 1 for adsorbing and stacking the fibers on the outer peripheral portion 10 and The fibers are adsorbed on the outer peripheral portion 20 and stacked, and a second drum 2 provided with a second area ⁇ 2 smaller than the first area ⁇ 1 is used. A step of stacking the fibers F from the supply device 3 in the second area ⁇ 2 to form a thick portion C2 on the second drum 2.
  • the area ⁇ 1 is provided with a step of forming the thin portion C1.
  • the thick portion C2 laminated on the second drum 2 is transferred onto the first drum 1, and then the thin portion C1 is stacked on the first drum 1. Therefore, the thin-walled portion C1 is stacked around the thick-walled portion C2, and the thin-walled portion C1 and the thick-walled portion C2 are unlikely to be displaced from each other.
  • the second method of manufacturing the absorbent core is The supply device 3 that supplies the crushed fiber F and A first drum 1 provided with a first area ⁇ 1 for adsorbing and stacking the fibers F on the outer peripheral portion 10 and The fibers F are adsorbed on the outer peripheral portion 20 and stacked, and a second drum 2 provided with a second area ⁇ 2 smaller than the first area ⁇ 1 is used. A step of stacking the fibers F from the supply device 3 in the second area ⁇ 2 to form a thick portion C2 on the second drum 2.
  • 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 into the thin portion C1.
  • the thin-walled portion C1 is formed on the first drum 1, and the thick-walled portion C2 on the second drum 2 is transferred to the inhibition area ⁇ 3 where the thin-walled portion C1 is not formed, so that the thick-walled portion C2 is formed. It fits into the thin portion C1. Therefore, the thin-walled portion C1 is arranged around the thick-walled portion C2, and the thin-walled portion C1 and the thick-walled portion C2 are unlikely to be displaced from each other.
  • the apparatus of the present invention includes a supply device 3 that supplies crushed fibers F and A first drum 1 that forms a thin-walled portion C1 in a first area ⁇ 1 in which the fibers F are adsorbed on the outer peripheral portion 10 and stacked.
  • a second drum 2 that adsorbs the fiber F to the outer peripheral portion 20 and stacks the fibers to form a thick portion C2 in a second area ⁇ 2 that is smaller than the first area ⁇ 1.
  • a first duct portion 31 that guides the fiber F from the supply device 3 to the outer peripheral portion 10 of the first drum 1.
  • a second duct portion 32 that guides the fiber F from the supply device 3 to the outer peripheral portion 20 of the second drum 2.
  • the thick portion C2 piled up in the above is provided with a point P for passing the thick portion C2 from the second drum 2 to an area on the first drum 1 where the thin portion C1 is not formed.
  • the thick portion C2 formed on the second drum 2 is arranged on the first drum 1 in which the thin portion C1 is not formed. Therefore, the thin-walled portion C1 is in a state of being stacked around the thick-walled portion C2, and the thin-walled portion C1 and the thick-walled portion C2 are unlikely to be displaced from each other.
  • FIG. 1A is a conceptual side view showing Example 1 of the manufacturing apparatus and method
  • FIG. 1B is a developed view showing an area of a drum
  • FIG. 1C is a perspective view of an absorbent core
  • FIG. 2A is a conceptual side view showing Example 2 of the manufacturing apparatus and method
  • FIG. 2B is a developed view showing an area of a drum
  • FIG. 2C is a plan view of an absorbent core.
  • the thick portion C2 on the second drum 2 is the first of the first drum 1 in a state where the fibers F are not stacked in the first area ⁇ 1. It is adsorbed and arranged in the area ⁇ 1.
  • the thick portion C2 on the second drum 2 is adsorbed on the first area ⁇ 1 of the first drum 1, the thick portion C2 is less likely to be displaced.
  • the thick portion is matched with the planar shape of the inhibition area ⁇ 3 of the first drum 1. C2 is formed.
  • the thick portion C2 whose shape matches the inhibition area ⁇ 3 can be transferred to the inhibition area ⁇ 3.
  • the fibers F may not be stacked in the inhibition area ⁇ 3.
  • the continuous absorbent core C is cut into units of individual worn items.
  • the absorbent core C is formed so that the surface of the thick portion C2 protrudes from the surface of the thin portion C1.
  • the thick portion C2 is laminated on the second drum 2 in a state where the thin portion C1 is not stacked on the first drum 1.
  • the second drum 2 comes into contact with the first drum 1 via the thick portion C2 at the point P so that is delivered from the second drum 2 to the first drum 1.
  • the thin-walled portion C1 is stacked on the first drum 1 in the first area ⁇ 1 other than the inhibition area ⁇ 3 in which the stacking of fibers F is inhibited.
  • the thick portion C2 stacked on the second drum 2 is formed from the second drum 2 to the first drum 1 in a state where the fibers F are not stacked in the inhibition area ⁇ 3.
  • the second drum 2 comes into contact with the first drum 1 via the thick portion C2 so as to be delivered to the inhibition area ⁇ 3.
  • the absorbent core manufactured by this manufacturing apparatus is used as a core of an incontinence pad in addition to disposable pants and diapers, for example, and may have an hourglass-shaped shape in a plan view, for example.
  • FIG. 1 shows Example 1.
  • the manufacturing apparatus includes a supply 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 defibrate (crushes) pulp supplied from the upstream into fibers to produce fluff pulp (fibers).
  • the fluff pulp fills the case 30, and the suction chambers (not shown) of the stacking drums 1 and 2 are set to a negative pressure through the first and second duct portions 31 and 32.
  • the fibers are stacked on the outer peripheral portions 10 and 20 of the fiber stacking drums 1 and 2.
  • Such defibration and stacking is a well-known technique and is disclosed, for example, in JP2009-112438A.
  • granules (super absorbent polymer particles) of a polymer compound having a high absorbency so-called SAP, may be added.
  • the first and second drums 1 and 2 are substantially cylindrical, and as is well known, they are formed of a plurality of segments (not shown).
  • the first and second drums 1 and 2 are provided corresponding to the first and second duct portions 31 and 32.
  • These drums 1 and 2 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) while continuously rotating in the circumferential direction R.
  • the fibers F are continuously stacked on the outer peripheral portions 10 and 20 of the predetermined first or second areas ⁇ 1 and ⁇ 2 by suction.
  • 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 suction chamber has a negative pressure.
  • Each suction chamber is arranged close to the inner peripheral side of the outer peripheral portions 10 and 20 of the drums 1 and 2, and therefore, in the suction section T1, fibers are stacked and sucked and held in the drums 1 and 2.
  • each drum 1 and 2 is provided with a non-suction section T2 in which the outer peripheral portions 10 and 20 of the drum do not face the suction chamber.
  • the first area ⁇ 1 of the first drum 1 is continuous with the circumferential direction R of the first drum 1.
  • the second area ⁇ 2 of the second drum 2 is intermittently provided at regular intervals in the circumferential direction R of the second drum 2.
  • the portions of the areas ⁇ 1 and ⁇ 2 are usually recesses for stacking fibers.
  • the basic or specific structures of these recesses and drums are well known and are disclosed, for example, in Japanese Patent Nos. 2,541,558, 4,312,112, 3,153,060 and the like.
  • the second area ⁇ 2 is provided so as to be included in the first area ⁇ 1.
  • the second area ⁇ 2 provided intermittently is smaller and included in both the circumferential direction R and the width direction D with respect to the first area ⁇ 1 provided continuously. It is provided in.
  • the region of the outer peripheral portion 20 other than the second area ⁇ 2 is the inhibition area ⁇ 4 in which the stacking of fibers F is inhibited.
  • the first area ⁇ 1 may have an hourglass-shaped shape developed in a plane and may be discontinuous.
  • the thin portion C1 of FIG. 1C is formed in the first area ⁇ 1 of FIG. 1B.
  • the thick portion C2 of FIG. 1C is formed in the second area ⁇ 2 of FIG. 1B.
  • the first and second duct portions 31 and 32 of FIG. 1A are connected to the case 30 of the supply device 3, and the fibers F are transferred from the supply 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.
  • each drum 10 and 20 faces the opening at the end of each duct portion 31 and 32.
  • Domes 31D and 32D extending along the drum may be formed at the end of each duct portion.
  • the thick part C2 is bulkier and thicker than the thin part C1. Such a difference in thickness between the thin portion C1 and the thick portion C2 can be obtained by, for example, changing the magnitude of the negative pressure in the suction chamber and the adsorption period.
  • the first drum 1 and the second drum 2 are in contact with each other via the thick portion C2 at the delivery point P.
  • the first drum 1 is set in the suction section T1
  • the second drum 2 is set in the non-suction section T2.
  • the first drum 1 and the second drum 2 are close enough to pass the thick portion C2 from the second drum 2 to the first drum 1 even if they are not in contact with each other via the thick portion C2. You may.
  • a first web (web) W1 (carrier web) for transporting the absorbent core C formed of the thin portion C1 and the thick portion C2 is transported downstream of the first drum 1.
  • a transport unit 41 is provided. Further downstream of the first transport unit 41, a second transport unit 42 for transporting the second web W2 that sandwiches the absorbent core C with the first web W1 is provided.
  • the first transport unit 41 transports 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 transporting units 41 and 42 is provided with a guide roller (roller), a winding roller for unwinding the web, and an anvil roll (anvil roll) for transporting and cutting the absorbent core C sandwiched between the pair of webs.
  • the web may have water absorption and water permeability.
  • the above-mentioned delivery point P is provided between the first duct portion 31 and the second duct portion 32, and 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 This is a point at which the thick portion C2 piled up in the above is passed from the second drum 2 to the area on the first drum 1 where the thin portion C1 is not formed.
  • the fibers F generated by the supply device 3 are stacked in the second area ⁇ 2, whereby the outer peripheral portion on the second drum 2 is stacked.
  • the thick portion C2 is attracted to 20 at regular intervals and is conveyed to the delivery point P.
  • 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 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 arranged in the first area ⁇ 1 of the first drum 1.
  • the thick portion C2 is adsorbed and arranged (transferred) to the first area ⁇ 1 in a state where the fibers F are not stacked in the first area ⁇ 1.
  • the fibers F generated by the supply device 3 are stacked in the first area ⁇ 1.
  • a continuous thin-walled portion C1 is generated in a portion around the thick-walled portion C2.
  • the fibers F may be slightly stacked at the portion of the thick portion C2 in the first area ⁇ 1.
  • the thin-walled portion C1 forms a continuous absorbent core C along the outer peripheral portion 10 of the first drum 1.
  • 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 exits the dome 31D of the first duct portion 31, it is transferred and transported on the first web W1 guided to the first transport portion 41 in the non-suction section T2.
  • the absorbent core C is sandwiched between the second web W2 and the first web W1 transported by the second transport unit 42, and then the absorbent core C is cut into units of individual worn articles. As shown in FIG. 1C, the surface of the thick portion C2 is formed in the absorbent core C so as to protrude from the surface of the thin portion C1.
  • FIG. 2 shows Example 2.
  • the second embodiment will be mainly described with respect to the parts different from the first embodiment.
  • the first drum 1 is provided with an inhibition area ⁇ 3 in which the stacking of fibers F is inhibited in addition to the first area ⁇ 1.
  • the inhibition area ⁇ 3 for example, the pore ratio of the mesh of the outer peripheral portion 10 may be set small so that suction due to negative pressure is weakened.
  • the first drum 1 and the second drum 2 are in contact with each other at the delivery point P in the following states.
  • a thin portion C1 having a lower basis weight than the thick portion C2 is placed on the first drum 1 in an area other than the inhibition area ⁇ 3 in the first area ⁇ 1 where the fibers of the fibers F are inhibited. Form. At this time, the fibers F do not have to be stacked in the inhibition area ⁇ 3.
  • the fibers F from the supply device 3 are stacked in 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 of FIG. 2C is generated, and a continuous absorbent core C sandwiched between the pair of webs W1 and W2 is generated as in the above-described first embodiment.
  • the duct portions 31 and 32 may be connected to separate defibrators.
  • the absorbent core C may be formed on the drum in a state of being discontinuous in the circumferential direction R. Therefore, such changes and amendments are construed as being within the scope of the invention as defined by the claims.
  • the present invention can be used to manufacture an absorbent core for disposable wear articles.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Textile Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2020/011312 2019-04-10 2020-03-14 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 WO2020209006A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US17/600,583 US11850129B2 (en) 2019-04-10 2020-03-14 Apparatus and method for manufacturing absorbent core used in disposable wearable article
CN202080020507.7A CN113556995B (zh) 2019-04-10 2020-03-14 一次性穿着物品的吸收性芯的制造装置及制造方法
EP20788234.1A EP3954350B1 (en) 2019-04-10 2020-03-14 Apparatus and method for production of absorbent core used in disposable wearing article
JP2021513532A JP7348272B2 (ja) 2019-04-10 2020-03-14 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

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-074625 2019-04-10
JP2019074625 2019-04-10

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WO2020209006A1 true WO2020209006A1 (ja) 2020-10-15

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US (1) US11850129B2 (https=)
EP (1) EP3954350B1 (https=)
JP (1) JP7348272B2 (https=)
CN (1) CN113556995B (https=)
WO (1) WO2020209006A1 (https=)

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JPWO2023063143A1 (https=) * 2021-10-15 2023-04-20

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CN113556995B (zh) * 2019-04-10 2022-11-29 株式会社瑞光 一次性穿着物品的吸收性芯的制造装置及制造方法

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