WO2016121985A1 - Article absorbant comportant une section élastique dans le sens de la largeur et procédé de production d'un article absorbant - Google Patents

Article absorbant comportant une section élastique dans le sens de la largeur et procédé de production d'un article absorbant Download PDF

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Publication number
WO2016121985A1
WO2016121985A1 PCT/JP2016/052815 JP2016052815W WO2016121985A1 WO 2016121985 A1 WO2016121985 A1 WO 2016121985A1 JP 2016052815 W JP2016052815 W JP 2016052815W WO 2016121985 A1 WO2016121985 A1 WO 2016121985A1
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WIPO (PCT)
Prior art keywords
sheet layer
sheet
stretchable
elastic film
width direction
Prior art date
Application number
PCT/JP2016/052815
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English (en)
Japanese (ja)
Inventor
藤田　雅也
Original Assignee
大王製紙株式会社
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
Priority claimed from JP2015017498A external-priority patent/JP5980355B2/ja
Priority claimed from JP2015195468A external-priority patent/JP6099161B1/ja
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2016121985A1 publication Critical patent/WO2016121985A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • A61F13/45—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 shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B29C66/81429—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83415—Roller, cylinder or drum types the contact angle between said rollers, cylinders or drums and said parts to be joined being a non-zero angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to an absorbent article having a stretchable part in the width direction, in which a stretchable stretchable sheet having a first sheet layer and a second sheet layer sandwiching an elastic film is disposed along the width direction, and a method for producing the same.
  • a stretchable stretchable sheet having a first sheet layer and a second sheet layer sandwiching an elastic film is disposed along the width direction
  • a method for producing the same in particular, it relates to disposable diapers.
  • an absorbent article for example, a disposable diaper
  • stretchability in order to improve fit to the body surface, it is common to impart stretchability to appropriate places such as around the legs, around the waist or around the waist.
  • a method for imparting stretchability conventionally, a method of fixing an elongated elastic stretchable member such as rubber thread in a stretched state in the longitudinal direction has been widely adopted, but it is desired to impart stretchability to a certain width. In such a case, a mode is adopted in which the rubber thread is fixed in a state of being arranged side by side with an interval in the width direction.
  • Patent Document 1 discloses that a stretchable sheet is disposed around the waist to form a waist stretchable portion.
  • a nonwoven fabric / elastomer film / nonwoven fabric as a material that presses against a surface strip to give stretchability and takes the touch into consideration.
  • the stretchable sheet is flexible, the suction force by the vacuum means is superior, and the stretched sheet cannot be maintained in the stretched state.
  • the elastic sheet is made by sandwiching rubber thread between urethane foam and non-woven fabric, it is highly breathable and, as a result, is limited to those with low elastic stress, and the desired shrinkage force (clamping force) around the waist. ) Is not obtained.
  • Patent Document 2 supplies an elastic film that expands and contracts in a continuous MD direction having a higher melting point or no melting point between the first outer layer and the second outer layer, and the first outer layer and the second outer layer at a predetermined position.
  • the two outer layers are directly bonded by welding, and then a pulling force in the CD direction is applied to form a through-hole penetrating the entire first outer layer, elastic film, and second outer layer at the bonding site.
  • the stretchable sheet according to Patent Document 1 is intended for continuous production, the pattern of the raised portions in the heat bonding roller forming the joint is uniform in the width direction and the circumferential direction. Even if the position in the width direction is different, the stretching stress is uniform. Therefore, even if this stretchable sheet is applied as the seat around the waist, it is presumed that the same problem as the stretchable sheet is caused by its flexibility.
  • JP 2014-233553 A Japanese Patent No. 4562391
  • a main problem of the present invention is to provide an absorbent article having an expansion / contraction part in the width direction, for example, a disposable diaper having an expansion / contraction part extending and contracting around the waist, and a method for manufacturing the same.
  • the present invention that has solved the above problems is as follows.
  • the stretchable sheet is bonded to another material along the width direction of the article and has a stretchable part.
  • the stretchable sheet is formed by laminating the elastic film that can be stretched at least in the width direction between a first sheet layer having no stretchability and a second sheet layer, and the first sheet layer and the second sheet layer.
  • the second sheet layer is joined directly or via an elastic film with a large number of spaced joints, and the first sheet layer and the second sheet layer remain in the joint,
  • the stretchable sheet is contracted by the contraction force of the elastic film, and can be expanded when an external force is applied in the width direction.
  • the joint area ratio occupied by the total area of the joints included in a unit area is different between the first region and the second region adjacent thereto in the width direction,
  • the stretch stress of the first region is large and the stretch stress of the second region is small or the second region is not stretched, and the stretch sheet has a predetermined size, and other materials in the second region, that is, It is combined with other materials constituting the article.
  • the first region is configured to expand and contract.
  • the elastic film can be stretched at least in the width direction, it may be a two-way stretchable film that can be stretched in an orthogonal direction perpendicular to the width direction.
  • the first sheet layer and the second sheet layer remain in the joint portion. That is, a hole penetrating the first sheet layer and the second sheet layer is not formed.
  • This point is different from the stretchable sheet shown in FIG. 5 or 7 of Japanese Patent No. 4562391.
  • the hole formed according to Japanese Patent No. 4562391 exhibits great air permeability. Even if this stretchable sheet is applied to a stretchable sheet placed along the width direction of the article as in the present invention, it exhibits a large air permeability, so it is difficult to place it using the aforementioned vacuum means. I can guess.
  • the first sheet layer and the second sheet layer remain in the joint portion, and an elastic film is interposed therebetween, so that a suction force is applied by the vacuum means. Even if it is allowed to be sucked, it can be sufficiently sucked.
  • the first sheet layer and the second sheet layer remain in the joint portion, and no hole penetrating the first sheet layer and the second sheet layer is formed.
  • a hole is formed in a part of the elastic film.
  • an elastic film stretchable in at least the width direction is laminated between the first sheet layer that does not have stretchability and the second sheet layer that does not have stretchability, and The first sheet layer and the second sheet layer are joined and formed through a through hole formed in the elastic film at a number of spaced joints, and the first sheet layer and The second sheet layer remains, and the through hole is formed at a boundary portion between the joint portion and the elastic film.
  • region are the longitudinal directions of an elastic sheet, and are formed along the width direction of articles
  • the first region and the second region may be formed along the front-rear direction of the article in the width direction of the stretchable sheet. Even in the latter case, the first region can be configured to be located on both outer sides in the front-rear direction (of the article) of the second region.
  • a joining form there exists the following example of a joining form, for example.
  • the through holes do not need to be formed in all the joints, and exhibit air permeability even if formed in some of the joints.
  • the through hole may have a shape extending in the expansion / contraction direction from the edge of the joint portion, or the through hole may have a shape extending in both directions from the edge of the joint portion, and may have an annular shape around the joint portion in some cases.
  • the area of the joint portion in the stretchable region is 0.14 to 3.5 mm 2
  • the area of the opening of the through hole in the natural length state is 1 to 1 of the area of the joint portion.
  • the area ratio of the joint in the stretchable region is 1.8 to 22.5%.
  • the “area ratio” means the ratio of the target portion to the unit area, and the total area of the target portion (for example, joints and openings of through holes) in the target region (for example, the stretchable region) is the area of the target region.
  • the “joint area ratio” means the area ratio in a state of being stretched to the elastic limit in the stretching direction.
  • the area of the opening of the through hole means a value in a state in which the stretchable structure is in a natural length, and the area of the opening of the through hole is not uniform in the thickness direction, such as different between the front and back of the elastic film. Means the minimum value.
  • the joint area ratio in the present specification can be selected by selecting the size, shape, separation interval, arrangement pattern in the roll length direction and roll circumferential direction, etc. of the protrusions of the anvil roll described later.
  • “Elongation stress” is measured by a tensile test according to JIS K7127: 1999 “Plastics—Test method for tensile properties—” with an initial chuck interval (distance between marked lines) of 50 mm and a tensile speed of 300 mm / min. It means “stress when stretched to 50% of elastic limit (N / 35 mm)”.
  • the test piece is created with a width that can be cut out, and the measured value is set to a value converted into a width of 35 mm. If the target area is small and sufficient specimens cannot be collected, a comparatively small specimen can be compared at least if it is a comparison of stretching stress.
  • the absorbent article of the present invention can be produced, for example, by the following method.
  • a thermal melting energy is applied to the elastic film by a plurality of thermal melting portions spaced by a melting device, the elastic film is melted, and the first sheet layer and the second sheet layer are directly or via an elastic film.
  • a joining step of joining in a state where the first sheet layer and the second sheet layer remain in the joined portion by a large number of joined portions, Manufacturing a stretchable sheet including: Bonding the strip of the stretchable sheet to another material along the width direction of the article; The manufacturing method of the absorbent article characterized by including this.
  • the elastic film is passed through a nip roll step in which a pair of opposing nips are arranged in the front-rear direction, and the elastic speed is increased by increasing the peripheral speed of the front nip roll step relative to the peripheral speed of the rear nip roll step between the front and rear nip roll steps.
  • a method is provided for feeding a film to the feeding step in a stretched state. Another method may be to pass only a pair of nip rolls while winding the elastic film around the drive roll in, for example, an S shape.
  • the heat melting apparatus has an anvil roll and an ultrasonic horn, and the anvil roll has a plurality of protrusions formed on the outer surface thereof spaced apart in the roll length direction and the outer peripheral direction.
  • the aspect which comprises the said thermal fusion part with an ultrasonic horn is provided.
  • the ultrasonic heat melting apparatus other heat melting means may be used.
  • the melting point of the elastic film is lower than the melting point of the first sheet layer made of nonwoven fabric and the melting point of the second sheet layer made of nonwoven fabric, higher than this melting point, and lower than the melting points of the first sheet layer and the second sheet layer.
  • the melting energy corresponding to the temperature is applied, the elastic film is melted by heat, while the first sheet layer and the second sheet layer are not melted at all or are partially melted. As a result, holes are formed in the entire joint region. The first sheet layer and the second sheet layer remain. However, the line speed at the time of manufacturing the elastic sheet is high.
  • the elastic film preferably has a melting point of about 80 to 145 ° C.
  • the first sheet layer and the second sheet layer preferably have a melting point of about 85 to 190 ° C., particularly about 130 to 190 ° C.
  • the difference between the melting points of the first sheet layer and the second sheet layer and the melting point of the elastic film 30 having a lower melting point is preferably about 50 to 80 ° C.
  • the melting point of the elastic film is 95 to 125 ° C.
  • the melting point of the first sheet layer is more than 125 ° C. to 160 ° C., more preferably 130 to 160 ° C.
  • the melting point of the second sheet layer is 125. More than 160 ° C. to 160 ° C., more preferably 130 to 160 ° C.
  • an existing method can be used as a method not described.
  • a component constituting an absorbent article for example, a disposable diaper is formed.
  • an absorbent body is formed by laminating absorbent materials.
  • An original sheet of an elastic sheet is formed and cut individually to form an elastic sheet.
  • various materials such as an exterior sheet, an elastic sheet, a back sheet, an absorber, a top sheet, and a tape are combined.
  • the legs are cut or cut into individual articles. Thereby, an absorbent article can be manufactured.
  • an absorbent article having a stretchable part in the width direction for example, a disposable diaper having a stretchable part that stretches around the waist can be obtained.
  • FIG. It is a top view of the example of a tape type disposable diaper.
  • FIG. It is a 21-21 line arrow directional view. It is a 22-22 line arrow directional view. It is a top view which shows the various arrangement
  • the absorbent article of the present invention means a product that absorbs and retains body fluids such as disposable diapers, sanitary napkins, and absorbent pads.
  • the absorbent article has at least a stretchable portion that can be stretched in the front-rear direction. In addition to the front-rear direction, it is also possible to extend and contract in a direction perpendicular to this (in the disposable diaper, the waist direction (product width direction)).
  • the stretchable portion is formed between a first sheet layer 21 made of, for example, a non-woven fabric that does not have stretchability, and a second sheet layer 22 made of, for example, a non-woven fabric that does not have stretchability.
  • the elastic film 30 that can be expanded and contracted in the front-rear direction is laminated, and the first sheet layer 21 and the second sheet layer 22 are directly or via the elastic film 30 with a large number of intervals. 40 is joined.
  • “the first sheet layer 21 and the second sheet layer 22 are not stretchable” does not mean that the first sheet layer 21 and the second sheet layer 22 are not stretched at all. It means not.
  • the first sheet layer 21, the elastic film 30, and the second sheet are disposed between the anvil roll 60 having the protrusions 60 a formed in a predetermined pattern on the outer surface and the ultrasonic horn 61.
  • the sheet layer 22 is supplied, and ultrasonic melting energy is applied by the ultrasonic horn 61.
  • the elastic film 30 is mainly melted to join the first sheet layer 21 and the second sheet layer 22.
  • it explains in full detail later.
  • the elongation rate in the manufacturing process of the elastic film 30 (based on a natural state length of 100%) is, for example, that the peripheral speed of the anvil roll 60 that is driven to rotate is made faster than the peripheral speed of the rear drive roll 62. It can be set by selecting the speed difference between the rolls. 63 is a guide roller.
  • FIG. 6 schematically shows a cross section of the stretchable sheet after joining in the stretched state.
  • the stretchable sheet contracts due to the contraction force of the elastic film 30 and can be stretched by applying an external force in the front-rear direction (left-right direction in FIG. 7). Therefore, when the expansion / contraction direction of this stretchable sheet is matched with, for example, the front / rear direction of the disposable diaper, the disposable diaper can be expanded / contracted in the front / rear direction.
  • an elastic sheet can be manufactured with a predetermined area, when it is desired to apply a contracting force to the entire desired area, the elastic sheet cut into the desired area may be applied.
  • conventional disposable diapers it is generally performed by fixing a plurality of thread rubbers in parallel to the sheet, but this reduces quality due to deterioration of thread rubber and hot melt adhesive for fixing to the sheet, In addition, it is inferior in terms of stable productivity during production.
  • the first sheet layer 21 and the second sheet layer 22 are joined by melting the elastic film 30.
  • the bonding mode between the layers is not limited to these examples.
  • the first sheet layer 21 and the second sheet layer 22 are joined directly, that is, without interposing an elastic film.
  • the above aspects (1) to (3) are cases where the melting point of the elastic film 30 is lower than the melting points of the first sheet layer 21 and the second sheet layer 22, but the melting point of the elastic film 30 is the first sheet layer. 21 and / or higher than the melting point of the second sheet layer 22.
  • the elastic film 30 side surface portion of the first sheet layer 21 and / or the second sheet layer 22 is activated or melted and joined to the elastic film 30.
  • the elastic film 30 may be partly melted, and the first sheet layer 21 and / or the second sheet layer 22 may be joined by melting.
  • the 1st sheet layer 21 and / or the 2nd sheet layer 22 are nonwoven fabrics, and the fiber may have a core-sheath structure. In this case, for example, only the sheath component of the fiber can be melted and contribute to the joining.
  • the stretchable sheet is bonded to another material along the width direction of the article and has a stretchable part.
  • the joint area ratio occupied by the total area of the joints included in the unit area is different between the first region and the second region adjacent thereto.
  • a suitable applied absorbent article of the present invention is a disposable diaper and can be applied as an elastic sheet around the waist.
  • the joint area ratio is a percentage of the total area of the joints 40, 40... Included in the unit area S.
  • the unit area S in this case is desirably set to a size that includes at least 10 joints (it is difficult to compare the stretching stress with a small number).
  • 13 joint portions are included.
  • the external shape which defines unit area S may be other shapes, such as a rectangle and a circle, besides a square.
  • An example of the joint 40 is a circle shown in FIG. Of course, the shape may be an ellipse or a rectangle. In FIG.
  • Lm is an arrangement interval length in the machine direction
  • Lc is an arrangement interval length in an orthogonal direction (cross direction) orthogonal to the machine direction
  • Pm is a machine direction (pitch length of MD (, and Pc is an orthogonal direction (cross direction: CD)). ) Pitch length.
  • the expansion stress is in the relationship of A> B by setting the joint area ratio to A ⁇ B.
  • the case A when the pitch length Pm and the pitch length Pc are long and A is compared with the case B when the pitch length Pm and the pitch length Pc are short, the case A (when the joint area ratio is low) is long.
  • the pitch length Pm ⁇ Pc when the pitch length Pm ⁇ Pc is short, the elongation ratio is larger than that in B (when the joint area ratio is high).
  • the stretching stress has a relationship of A> B.
  • the form of FIG. 2 differs in the extensional stress in the lateral direction of FIG.
  • the region A having a large stretching stress is made to correspond to the intermediate region in the width direction of the absorbent article.
  • the B region having a small expansion / contraction stress is made to correspond to both outer sides of the A region.
  • FIG. 3 shows an example in which B and B regions having small stretching stress are arranged before and after the A region in the middle in the width direction.
  • the front and rear B regions and B regions can be made to correspond to, for example, the end portions in the width direction of disposable diapers. Since the expansion and contraction stress is small at the end portions in the width direction, the shape stability is not only good. In addition, since the air permeability is low or absent, there is a suction force resistance by the vacuum means, and it can be gripped well.
  • the difference in the joint area ratio can be achieved by changing the joint area in addition to the density of the arrangement pattern.
  • FIG. 4 shows an example in which a large number of small junctions are arranged in the region C so as to have the same junction area as the region D.
  • the elastic film in the present invention may be stretchable only in the front-rear direction, but may be a two-way stretchable film that stretches in the orthogonal direction.
  • the elastic film Physical properties such as thickness, material, strain / stress characteristics, melting point, etc. of the elastic film can be selected as appropriate. By selecting the relationship between this elastic film, the ultrasonic melting energy applied thereto, and the elongation rate of the elastic film at the time of manufacturing the stretchable sheet, as shown in FIG. 31 can be formed.
  • the first sheet layer 21 and the second sheet layer 22 are formed of, for example, a nonwoven fabric
  • the nonwoven fabric exhibits air permeability.
  • the air permeability is considered to be lower than that of the stretchable sheet according to Japanese Patent No. 4562391.
  • the reason why the ventilation through hole 31 is formed is not necessarily clear, but the elastic film 30 is melted by the ultrasonic melting energy, and the connecting portion 40 is thinned by the pressing by the projection 60 a of the anvil roll 60. At this time, the elastic film 30 is also thinned, the peripheral portion of the joint portion 40 reaches the breaking strength, the breakage is started by the stretching stress acting on the stretched elastic film 3, shrinks to the balanced portion, and opens. it is conceivable that.
  • FIG. 10 schematically shows an example of forming the through hole 31 in the case of a circular through hole.
  • a substantially crescent-shaped through hole 31 is formed on both sides of the connecting portion 40 in the machine direction (extension direction).
  • the connecting part can be formed in a long shape in a direction (cross direction: CD direction) orthogonal to the machine direction (extension direction).
  • a semicircular through hole 31 having a large opening can be formed.
  • the through holes 31 it is not essential for the through holes 31 to be formed in all the coupling portions. If it is required to reliably form the through-hole 31 or to open a large hole, the technique shown in FIG. 12 can be adopted. That is, as shown in FIG. 12B, the stretchable sheet in which the coupling portion 40 is formed is passed between a pair of rolls 64 having ridges or protrusions 64a, and between adjacent protrusions 64a and 64a of one roll 64.
  • the through-hole 31 can be formed by biting the protrusion 64a of the other roll 64 and applying a deformation force to the stretchable sheet.
  • the stretchable sheet formed as described above can be applied as an exterior sheet having the stretchable sheet 1 along the width direction at the back side end of the tape-type disposable diaper TD.
  • the first elastic region A in the center region in the width direction and the second elastic region B at both ends are made to have different expansion ratios, that is, The one stretchable region A has a large stretchability and exhibits a stretchable function.
  • the second stretchable region B is made difficult to stretch or does not stretch, and in the second stretchable region B, it is bonded to another sheet, for example, the liquid-impermeable back sheet 10 and / or the exterior sheet 11 by, for example, a hot melt adhesive. .
  • the first elastic region A expands and contracts freely.
  • the stretching stress can be made different between the first stretchable area A on the edge side of the paper diaper and the second stretchable area B on the center side. it can.
  • the joint area ratio if the relationship of the second stretchable region B> the first stretchable region A> the both side portions is maintained, the stretchability increases toward the outside, and the fit to the wearer is increased. It will be expensive.
  • the stretchable sheet may extend over almost the entire width of the diaper.
  • the fixed portion indicated by the symbol B is less likely to be located outside the central inner edge of the three-dimensional gather or hardly impedes the standing property of the three-dimensional gather.
  • the disposable diaper TD may be of a so-called “fundoshi” type in which the front body is wrapped with a long tape Ta.
  • leg extension / contraction parts 1 and 1 are formed on both outer sides of the extension / contraction sheet 1. These leg-hole stretchable parts 1 and 1 are formed on the inner side of the side edges, and do not impair the shape retention of the exterior sheet.
  • the stretchable sheet 1 having a stretchable part that can be stretched along the width direction of the article.
  • the stretchable sheet 1 is formed between a first sheet layer 21 made of, for example, a non-woven fabric that does not have stretchability, and a second sheet layer 22 made of, for example, a non-woven fabric that does not have stretchability.
  • the elastic film 30 is interposed between the first sheet layer 21 and the second sheet layer 22 in the stretched state, and the first sheet layer 21 and the second sheet layer 22 are From the outside, heat elastic energy is applied to the elastic film 30 by a plurality of heat melting portions spaced by a heat melting device, the elastic film is melted, and the first sheet layer 21 and the second sheet layer 22 are
  • a stretchable sheet is manufactured.
  • such a stretchable sheet flowing along the line direction is appropriately cut, the belt-like body of the stretchable sheet 1 is rotated 90 degrees, chucked by a known vacuum means (not shown), and flown along the line direction. It includes a bonding step in which the other material is positioned along the width direction of the article and bonded by a hot melt adhesive or a heat melting means.
  • the stretchable sheet 1 has different stretch ratios between the first stretchable area A and the second stretchable area B in the central region in the width direction of the stretchable sheet 1 as shown in FIGS. 17 and 19. Can be made. In this case, it is possible to easily chuck the second stretchable areas B, B at both ends of the stretchable sheet 1 by the vacuum means.
  • the stretch ratio can be made different between the first stretchable area A on the edge side of the paper diaper and the second stretchable area B on the center side. Also in this example, both ends of the elastic sheet 1A can be chucked by the vacuum means.
  • a disposable diaper having an absorbent element on the use surface side is optimal.
  • the absorbent body an absorbent body mainly composed of cotton-like pulp, or an absorbent body containing a high-molecular-weight absorbent polymer in the cotton-like pulp layer can be used. It is desirable that it is 2 mm or more. In the case of an absorber of less than 2 mm, the absorption capacity is not sufficient. In the case of an absorbent body having a thickness of less than 2 mm, or a cover-type disposable diaper that does not have an absorbent body, the shape retention tends to be poor.
  • Absorbers to be used are known ones such as pulp fiber stacks, aggregates of filaments such as cellulose acetate, or non-woven fabrics as basic elements. What mixed an adsorbent polymer, adhering, etc. can be used.
  • This absorbent body can be packaged with a packaging sheet having liquid permeability and liquid retention, such as crepe paper, if necessary, for holding the shape and polymer.
  • the shape of the absorbent body can be formed in an almost hourglass shape having a narrowed portion narrower than the front and rear sides at the crotch portion, and can also have an appropriate shape such as a rectangular shape.
  • FIGS. 19 to 22 show an example of a tape-type disposable diaper.
  • This disposable diaper has an absorbent body between the inner surface of the back elastic sheet 1 forming the back surface and the liquid-permeable top sheet 2. 3 is interposed.
  • the liquid-impermeable back elastic sheet 1 extends outside the periphery of the absorber 3 and blocks movement of excrement absorbed by the absorber 3 to the back side.
  • a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness.
  • a back sheet 11 made of a nonwoven fabric or the like is provided on the back side of the liquid-impermeable back sheet 10 made of a sheet of polyethylene or the like.
  • the outer peripheral edge of the diaper extends to the outer peripheral edge of the diaper.
  • a spunbond nonwoven fabric is suitable.
  • top sheet As the top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used.
  • synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and amides, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used.
  • processing method of a nonwoven fabric well-known methods, such as the spunlace method, the spun bond method, the SMS method, the thermal bond method, the melt blown method, the needle punch method, the air through method, the point bond method, can be used.
  • the fiber basis weight of the nonwoven fabric used for the liquid-permeable top sheet 2 is preferably 15 to 30 g / m 2 , and the thickness is preferably 0.05 to 1 mm.
  • the top sheet 2 extends outside the periphery of the absorbent body 3, and a portion extending outside the side edge of the absorbent body 3 is fixed to the liquid-impermeable back sheet 10 by, for example, a hot melt adhesive. Yes.
  • the dot pattern in a figure represents the adhering part.
  • a three-dimensional gather around the legs can be provided, and an example of the form is shown.
  • the three-dimensional gather sheet around the legs can be made of various non-woven fabrics (spunbond non-woven fabrics are suitable), plastic films similar to those used for the back sheet, or stretchable sheets thereof. In this respect, a nonwoven fabric subjected to a water repellent treatment is preferable.
  • the projecting portion on the center side in the width direction of the three-dimensional gather sheet around the legs is fixed to the inner surface of the article (in the illustrated form, the top sheet 2 surface) by means such as hot melt adhesive at the both ends in the front-rear direction, and is used as a lying portion.
  • the intermediate part in the front-rear direction between them is a non-fixed free part, and the end part of this free part (end part on the center side in the width direction in the unfolded state) is elongated such as rubber thread.
  • the elastic elastic member 4G is fixed with a hot-melt adhesive or the like in a state of extending along the front-rear direction.
  • a plurality of the elongated elastic elastic members 4G are provided with a predetermined interval, but one may be used.
  • this free part is a three-dimensional gather G around the leg that stands on the use surface of the diaper (the surface of the top sheet 2 in the illustrated embodiment).
  • Fastening tapes T that protrude from the side edges are attached to the side flaps of the back part B, and a front target tape 6 is attached to the waist part surface of the abdomen part F along the width direction.
  • the fastening tape T on both sides is turned from each side of the waist to the abdomen outer surface and fastened to the front target tape 6 via the hook material 5.
  • the front target tape 6 can be omitted.
  • the fastening tape T is directly hooked and fixed to the nonwoven fabric on the outer surface of the diaper.
  • Reference numeral 7 denotes a dividing perforation.
  • the constituent material of the 1st sheet layer 21 and the 2nd sheet layer 22 can be used without a limitation especially if it is a sheet form, it is preferable to use a nonwoven fabric from a viewpoint of air permeability and a softness
  • the nonwoven fabric is not particularly limited as to what the raw fiber is.
  • synthetic fibers such as olefins such as polyethylene and polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, natural fibers such as cotton, and mixed fibers and composite fibers using two or more of them. Etc. can be illustrated.
  • the nonwoven fabric may be manufactured by any processing.
  • the processing method examples include known methods such as a spunlace method, a spunbond method, a thermal bond method, a melt blown method, a needle punch method, an air through method, and a point bond method.
  • the basis weight is preferably about 10 to 25 g / m 2 .
  • each joint part 40 and the through-hole 31 is arbitrary, such as a perfect circle, an ellipse, polygons, such as a rectangle (including a linear or rounded thing), a star shape, a cloud shape, etc. It can be made into the shape.
  • the size of each joint 40 may be determined as appropriate, but if it is too large, the effect of the hardness of the joint 40 on the feel will increase, and if it is too small, the joint area will be small and the materials will not be sufficiently bonded together. Therefore, in general, the area of each joint 40 is preferably about 0.14 to 3.5 mm 2 .
  • the opening area of each through-hole 31 may be equal to or greater than the joint because the joint is formed through the through-hole 31, but is preferably about 1 to 1.5 times the area of the joint.
  • middle can also be formed.
  • the area and the area ratio of each joint 40 in each region are preferably set as follows.
  • Non-stretchable area Area of the joint 40: 0.14 to 3.5 mm 2 (especially 0.25 to 1.0 mm 2 ) Area ratio of the joint 40: 16 to 45% (especially 25 to 45%) (Main elastic sheet 1) Area of the joint 40: 0.14 to 3.5 mm 2 (particularly 0.14 to 1.0 mm 2 ) Area ratio of the joint 40: 1.8 to 19.1% (particularly 1.8 to 10.6%) (Transition expansion / contraction part) Area of the joint 40: 0.14 to 3.5 mm 2 (especially 0.25 to 1.0 mm 2 ) Area ratio of the joint 40: 8 to 22.5% (especially 12.5 to 22.5%)
  • the plane arrangement of the joints 40 and the through-holes 31 can be determined as appropriate, but a plane arrangement that is regularly repeated is preferable, such as an oblique lattice shape as shown in FIG. 23 (a), or as shown in FIG. 23 (b). Hexagonal lattice shape (these are also called staggered shapes), square lattice shape as shown in FIG. 23 (c), rectangular lattice shape as shown in FIG. 23 (d), and parallel shape as shown in FIG. 23 (e). Body lattice (in the form shown in the figure, two groups are provided so that a large number of groups of parallel diagonal rows cross each other), etc.
  • the group of joints 40 (group unit arrangement may be regular or irregular, and may be a pattern or a character shape) is repeated regularly. You can also.
  • the arrangement form of the joint portion 40 and the through hole 31 may be the same in the main stretchable sheet 1, the transition stretchable portion, and the non-stretchable region, or may be different.
  • the elastic film 30 is not particularly limited, and can be used without particular limitation as long as it is a resin film having its own elasticity.
  • a styrene-based elastomer, an olefin-based elastomer, a polyester-based elastomer, a polyamide-based elastomer, and a polyurethane-based film can be used.
  • a product obtained by processing one or two or more blends of thermoplastic elastomers such as elastomers into a film by extrusion molding such as a T-die method or an inflation method can be used.
  • the elastic film 30 in addition to a non-porous film, a film in which a large number of holes and slits are formed for ventilation can be used.
  • the tensile strength in the stretching direction is 8 to 25 N / 35 mm
  • the tensile strength in the direction perpendicular to the stretching direction is 5 to 20 N / 35 mm
  • the tensile elongation in the stretching direction is 450 to 1050%
  • the direction perpendicular to the stretching direction is preferable.
  • the tensile strength and tensile elongation (breaking elongation) were determined according to JIS K7127 except that a tensile tester (for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU) was used and the test piece was rectangular with a width of 35 mm and a length of 80 mm.
  • a tensile tester for example, AOUTGRAPHAGS-G100N manufactured by SHIMADZU
  • the thickness of the elastic film 30 is not particularly limited, but is preferably about 20 to 40 ⁇ m.
  • the basis weight of the elastic film 30 is not particularly limited, but is preferably about 30 to 45 g / m 2 , particularly preferably about 30 to 35 g / m 2 .
  • Elongation rate means a value when the natural length is 100%.
  • Weight is measured as follows. After the sample or test piece is pre-dried, it is left in a test room or apparatus in a standard state (the test place is temperature 20 ⁇ 5 ° C. and relative humidity 65% or less) to obtain a constant weight. Pre-drying refers to making a sample or test piece constant in an environment where the relative humidity is 10 to 25% and the temperature does not exceed 50 ° C. In addition, it is not necessary to perform preliminary drying about the fiber whose official moisture content is 0.0%.
  • a sample with a size of 200 mm ⁇ 250 mm ( ⁇ 2 mm) is cut out from the test piece in a constant weight using a rice-basis plate (200 mm ⁇ 250 mm, ⁇ 2 mm). Measure the weight of the sample, multiply it by 20, calculate the weight per square meter, and use it as the basis weight.
  • - "thickness” is used automatic thickness measuring instrument (KES-G5 Handy Compression measurement program), load: 10 gf / cm 2, and the pressure area: automatically measured under the conditions of 2 cm 2.
  • the test and measurement shall be performed in a test room or equipment in the standard condition (test location is temperature 20 ⁇ 5 °C, relative humidity 65% or less). .
  • the present invention can be used for a wide variety of absorbent articles having a stretchable structure such as various disposable diapers such as tape type and pad type, sanitary napkins, etc. in addition to the pants type disposable diapers as in the above examples.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (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)

Abstract

L'invention concerne un article absorbant qui utilise un voile élastique et comporte une section élastique dans le sens de la largeur. L'invention concerne donc un article absorbant comportant une section élastique dans laquelle un voile élastique (1) est relié à un autre matériau dans le sens de la largeur de l'article absorbant au niveau d'au moins une extrémité de l'article absorbant dans le sens longitudinal. Le voile élastique comporte un film élastique (30), qui est capable de s'étirer au moins dans le sens longitudinal et qui est pris en sandwich entre une première couche de voile (21) qui ne s'étire pas et une seconde couche de voile (22), la première couche de voile (21) et la seconde couche de voile (22) étant reliées directement ou avec le film élastique (30) entre elles par l'intermédiaire d'un grand nombre de joints (40) qui sont espacés les uns des autres. Le voile élastique (1) se contracte en raison de la force contractile du film élastique (30), et peut être étiré par application d'une force extérieure dans le sens de la largeur de l'article. Le rapport de surface des joints, qui représente la superficie totale des joints (40) à l'intérieur d'une unité de surface, d'une première zone (A) diffère de celui d'une seconde zone (B) adjacente à la première zone (A) dans le sens de la largeur.
PCT/JP2016/052815 2015-01-30 2016-01-29 Article absorbant comportant une section élastique dans le sens de la largeur et procédé de production d'un article absorbant WO2016121985A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015017498A JP5980355B2 (ja) 2015-01-30 2015-01-30 吸収性物品の伸縮構造、及びこれを用いたパンツタイプ使い捨ておむつ
JP2015-017498 2015-01-30
JP2015-195468 2015-09-30
JP2015195468A JP6099161B1 (ja) 2015-09-30 2015-09-30 幅方向に伸縮部を有する吸収性物品及びその製造方法

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05228177A (ja) * 1992-02-24 1993-09-07 Nippon Kiyuushiyuutai Gijutsu Kenkyusho:Kk 新規な弾性複合体を伸縮部に備えたパンツ状生理用品
JP2004532758A (ja) * 2001-06-21 2004-10-28 ザ プロクター アンド ギャンブル カンパニー 弾性のある積層ウェブ
JP4508885B2 (ja) * 2005-01-20 2010-07-21 花王株式会社 吸収性物品
JP2012051301A (ja) * 2010-09-02 2012-03-15 Three M Innovative Properties Co 伸縮性積層シート
JP4934835B2 (ja) * 2007-04-10 2012-05-23 株式会社瑞光 積層伸縮シートの製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05228177A (ja) * 1992-02-24 1993-09-07 Nippon Kiyuushiyuutai Gijutsu Kenkyusho:Kk 新規な弾性複合体を伸縮部に備えたパンツ状生理用品
JP2004532758A (ja) * 2001-06-21 2004-10-28 ザ プロクター アンド ギャンブル カンパニー 弾性のある積層ウェブ
JP4508885B2 (ja) * 2005-01-20 2010-07-21 花王株式会社 吸収性物品
JP4934835B2 (ja) * 2007-04-10 2012-05-23 株式会社瑞光 積層伸縮シートの製造方法
JP2012051301A (ja) * 2010-09-02 2012-03-15 Three M Innovative Properties Co 伸縮性積層シート

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