WO2016121984A1 - Article absorbant ayant des régions élastiques - Google Patents

Article absorbant ayant des régions élastiques Download PDF

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Publication number
WO2016121984A1
WO2016121984A1 PCT/JP2016/052814 JP2016052814W WO2016121984A1 WO 2016121984 A1 WO2016121984 A1 WO 2016121984A1 JP 2016052814 W JP2016052814 W JP 2016052814W WO 2016121984 A1 WO2016121984 A1 WO 2016121984A1
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WO
WIPO (PCT)
Prior art keywords
stretchable
sheet
rear direction
sheet layer
region
Prior art date
Application number
PCT/JP2016/052814
Other languages
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 JP2015195467A external-priority patent/JP6052747B1/ja
Application filed by 大王製紙株式会社 filed Critical 大王製紙株式会社
Publication of WO2016121984A1 publication Critical patent/WO2016121984A1/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 region, typically a disposable diaper, provided with a stretchable sheet in which a first sheet layer and a second sheet layer sandwich an elastic film.
  • 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 and around the trunk.
  • a method for imparting stretchability conventionally, a method of fixing an elongated elastic member such as rubber thread in a state of being stretched in the longitudinal direction has been widely adopted.
  • an elongated elastic member such as rubber thread
  • Patent Document 1 an elastic film that expands and contracts in a continuous MD direction having a higher melting point or no melting point is supplied between the first outer layer and the second outer layer, and the first outer layer at a predetermined position. And a second outer layer are directly bonded by welding, and then a pulling force is applied to the CD direction to form a through hole penetrating the first outer layer, the elastic film, and the entire second outer layer at the bonding site. is there.
  • a main problem of the present invention is to provide an absorbent article having a stretchable region in which the stretching stress differs depending on the position in the stretchable region.
  • the present invention that has solved the above problems is as follows.
  • the absorbent article of the present invention is provided with a stretchable sheet that can be stretched in the front-rear direction.
  • an elastic film that is stretchable in the front-rear direction is laminated between a first sheet layer made of, for example, a non-woven fabric that does not have stretchability, and a second sheet layer, made of, for example, a non-woven fabric that does not have stretchability.
  • the first sheet layer and the second sheet layer are joined at a large number of joints that are spaced apart, either directly or via an elastic film.
  • the stretchable sheet contracts due to the contraction force of the elastic film, and can expand when an external force is applied in the front-rear direction.
  • the joint area ratio occupied by the total area of the joints included in the unit area is different between the intermediate region and the both side regions in the width direction of the stretchable sheet.
  • the stretching stress in the front-rear direction is different between them.
  • the arrangement pattern of the joint is not limited.
  • One example is a staggered arrangement that exhibits a good appearance.
  • Disposable diapers are fixed around the waist with tape, and generally are not provided with a member that fits the entire front and back bodies. That is, because it does not follow the movement of the waist well, when the wearer gets up or bends, the front and back of the diaper may be lifted (separated) from the body surface, or may be displaced in the front-rear direction. , So-called leakage before and after.
  • the wearer is provided with a stretchable sheet that is stretchable at least in the front-rear direction and has a stretchable region at least in the intermediate region in the width direction.
  • the intermediate region of the tape-type disposable diaper expands and contracts in the front-rear direction, so that the front and rear are lifted (separated) from the body surface Alternatively, it is possible to prevent the wearer from shifting in the front-rear direction, and to suppress front-rear leakage. Furthermore, especially when the stretchable sheet constitutes the outer shape sheet, since the stretchable region is formed in the intermediate region in the width direction, wrinkles or irregularities are formed by contraction in the front-rear direction, so when the wearer of the diaper gets up from the supine state, Since it has a non-slip function, it has the advantage of preventing longitudinal displacement.
  • Another aspect of the absorbent article of the present invention is that, in the region of the stretchable region, the joint area ratio occupied by the total area of the joints included in the unit area is the intermediate region and both sides in the width direction of the stretchable sheet. It is an absorbent article in which the stretching stress in the front-rear direction is different between the width directions by being different in the region and also in the intermediate region.
  • Another aspect of the absorbent article of the present invention is capable of stretching at least in the front-rear direction, the first stretchable region in the front-rear direction intermediate region of the widthwise intermediate region, and the second stretchable in the front-rear direction of the front-rear direction intermediate region.
  • An absorbent article comprising a stretchable sheet having a region, The stretchable sheet is formed by laminating the elastic film that is stretchable at least in the front-rear direction between the first sheet layer having no stretchability and the second sheet layer, and the first sheet layer and the second sheet layer The second sheet layer is joined at a large number of spaced joints, either directly or via an elastic film, The stretchable sheet contracts due to the contraction force of the elastic film, and is extensible when an external force is applied in the front-rear direction.
  • the joint area ratio occupied by the total area of the joints included in the unit area is different in the front-rear direction intermediate region and both side regions of the width-direction intermediate region of the stretchable sheet, so that the front-rear direction between the width directions
  • the absorbent article has a configuration in which the stretching stress in the front-rear direction is different due to the difference in stretching stress between the front-rear direction intermediate region and the front-rear region.
  • a further different aspect of the absorbent article of the present invention is an absorbent article that includes an elastic sheet that can be expanded and contracted in the front-rear direction and the width direction, and that has at least an elastic region in the intermediate region in the width direction of the elastic sheet,
  • the stretchable sheet is formed by laminating the elastic film that is stretchable at least in the front-rear direction between the first sheet layer having no stretchability and the second sheet layer, and the first sheet layer and the second sheet layer
  • the second sheet layer is joined at a large number of spaced joints, either directly or via an elastic film,
  • the stretchable sheet contracts due to the contraction force of the elastic film, and is extensible when an external force is applied in the front-rear direction.
  • the joint area ratio occupied by the total area of the joints included in the unit area is different between the intermediate region and both side regions in the width direction, so that the stretching stress in the front-rear direction is different between the width directions. It is an absorptive article of the composition which is.
  • the expansion / contraction of the expansion / contraction region that can be expanded / contracted not only in the front / rear direction but also in the width direction contributes to improving the fit around the waist or around the waist particularly in the case of a diaper.
  • the difference in elastic film strength occurs between the joined part and the non-joined part. Therefore, after the stretched state of the stretch sheet holding the extension is once released and contracted to obtain a product; or after the stretch sheet holding the stretch is combined with another member, the stretched state is once released and contracted.
  • the product is stretched mechanically or manually in the expansion / contraction direction, breakage occurs at the boundary between the joined portion and the non-joined portion. As a result, a through hole is formed.
  • the absorbent article includes an elastic sheet that can be stretched at least in the front-rear direction and has a stretchable region at least in the intermediate region in the width direction. In the stretchable region, the stretchable sheet has stretchability.
  • An elastic film that can be stretched at least in the front-rear direction is laminated between the first sheet layer that does not stretch and the second sheet layer that does not have stretchability, and the first sheet layer and the second sheet layer.
  • 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 has a shape extending in the front-rear direction from the edge of the joint.
  • the elastic film can be expanded and contracted in both the front-rear direction or the MD direction and the direction perpendicular to the MD direction (for example, the CD direction)
  • the through-hole has a shape extending in both directions from the edge of the joint, and sometimes around the joint May have an annular shape.
  • the elastic film of the present invention can be stretched in the front-rear direction (for example, the MD direction), and can be stretched in the front-rear direction and the orthogonal direction (for example, the CD direction).
  • the following form is obtained.
  • It is an absorbent article that can be stretched in the front-rear direction and the width direction, and has a stretchable region at least in the intermediate region in the width direction
  • an elastic film stretchable in the front-rear direction and the width direction is laminated between a first sheet layer that does not have stretchability and a second sheet layer that does not have stretchability, and The first sheet layer and the second sheet layer are formed by being joined through through holes formed in the elastic film, with a large number of spaced joints.
  • the stretchable region is contracted by the contraction force of the elastic film, and can be expanded by applying an external force in the front-rear direction.
  • the joint area ratio occupied by the total area of the joints included in the unit area is different between the intermediate region and both side regions in the width direction, so that the stretching stress in the front-rear direction is different between the width directions.
  • the joint is provided with a configuration in which the length in the orthogonal direction (width direction: CD direction) is longer than the length in the front-rear direction.
  • the stretchable sheet that can be stretched in the front-rear direction can be manufactured, for example, by the following method.
  • the elastic film is interposed between the first sheet layer and the second sheet layer, and is spaced from the outside of the first sheet layer and the second sheet layer by a heat melting device.
  • the elastic film is provided with heat melting energy by a large number of heat melting portions opened to melt the elastic film, and the first sheet layer and the second sheet layer can be directly connected to the elastic film through the elastic film.
  • Joining process of joining with, Including the stretchable region is formed in which no hole is formed in the entire joint region and the first sheet layer and the second sheet layer remain.
  • 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.
  • 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 present invention it is possible to expand and contract in the front-rear direction, and have an expansion / contraction region in the intermediate region in the width direction of the expansion / contraction sheet.
  • a sex product can be obtained.
  • the followability to the wearer's movement is improved, and effects such as prevention of leakage are exhibited.
  • FIG. 1 It is a top view for description of the formation example of the through-hole which differs in an aspect. It is a top view for description of the example of formation of a through hole. It is an expanded state outline top view of the tape type disposable diaper of the 1st example. It is an expansion state outline top view of a tape type disposable diaper of the 2nd example. It is an expansion state outline top view of a tape type disposable diaper of the 3rd example. It is an expansion state outline top view of a tape type disposable diaper of the 4th example. It is an expansion state outline top view of a tape type disposable diaper of the 5th example. It is an expansion state outline top view of a tape type disposable diaper of the 6th example. It is a top view of the example of a tape type disposable diaper.
  • 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 region 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 region 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 bonding portions. 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 the length of the natural state being 100%) is, for example, that the peripheral speed of the driving anvil roll 60 is faster than the peripheral speed of the rear driving 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 main feature of the present invention is that the width direction intermediate region has a stretchable region, and the width direction is different between the middle region and both side regions, so that the stretch stress between the width direction is different. It is.
  • the ratio of the total area of the joints included in the unit area of the region to the unit area, that is, the joint area ratio is selected.
  • the present invention provides a high effect or advantage when applied to a disposable diaper, particularly a tape-type disposable diaper. Let's assume that this is applied to a tape-type disposable diaper. For example, when the side edge region of the diaper also exhibits elasticity, the shape and flatness of the side edge region are not determined, and it is difficult to wear the diaper to the wearer.
  • the bonding area ratio of the side edge region is higher than that of the intermediate region, and is difficult to deform if necessary.
  • 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 10 or more 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 (MD pitch length
  • 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.
  • region A having a large stretching stress is made to correspond to the intermediate region in the width direction of the absorbent article.
  • region where expansion / contraction stress is small is made to respond
  • the B region having a small expansion and contraction stress is arranged before and after the intermediate region A in the front-rear direction.
  • the front and rear B regions and the B region can correspond to, for example, front and rear end portions of the disposable diaper. Since the stretching stress is small at the front and rear end portions, the shape stability is good. It becomes easy to attach to.
  • 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 the use of the two-way stretchable film that stretches in the direction orthogonal to the waist is used around the waist or the waist especially in the case of a disposable diaper. Since expansion and contraction is imparted, there are advantages such as enhancing fit. In this case, as described above, if the bonding area ratio of the side edge region is set higher than that of the intermediate region, the shape retaining property of the diaper is not substantially impaired even if the intermediate region expands and contracts in the width direction.
  • the thickness, material, strain / stress characteristics, and melting point of the elastic film can be selected as appropriate.
  • 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.
  • Through-holes 31 can be formed around the periphery.
  • the nonwoven fabric exhibits air permeability. Therefore, for example, when used as an outer sheet or an outer sheet of a disposable diaper, the air permeability is good.
  • 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 a stretchable region 84 in the intermediate region in the width direction of the tape-type disposable diaper TD.
  • This has many advantages. That is, when the wearer gets up or bends, the front and back of the diaper may be lifted (separated) from the body surface or may be displaced in the front-rear direction. However, in the embodiment, there is no such problem and leakage can be prevented.
  • the stretch rate differs between the intermediate portion 84B as the first stretchable region and the front and back portion 84A as the second stretchable region
  • the front and rear portions 84A are difficult to stretch (for example, the elongation rate is 200% or less), and the intermediate portion 84B can be easily stretched.
  • the wearer since the front and rear regions do not extend excessively and there is resistance to elongation, the wearer has good wearability.
  • the stretch rate differs between the front and rear portions 84A and 84B, and the length in the width direction of the front and back portions 84A that are difficult to stretch is easily stretched. It can be larger than the width of 84B.
  • the expansion / contraction rate can be made different between the width direction outer portion 84a and the center portion 84b in the expansion / contraction region 84 of the intermediate region in the width direction.
  • the area ratio of the joint portion is such that the central portion 84b> the outer portion 84a> both side portions, a cross-sectional bay shape along the wearer's surface is obtained, and the fitting property is high.
  • 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 areas 83 and 83 are formed on both outer sides of the extension / contraction area 84. These leg-surrounding stretchable regions 83, 83 are formed on the inner side from both side edges, and do not impair the shape retention of the exterior sheet.
  • a cover-type disposable diaper that does not have an absorbent element on the use surface side is particularly suitable for a disposable diaper.
  • an extensible sheet can be used as an exterior sheet, and an absorbent element can be provided on the use surface side.
  • an absorbent body mainly composed of cotton-like pulp or an absorbent body containing a polymer-absorbing polymer in a cotton-like pulp layer can be used. Is preferably less than 2 mm. In the case of an absorbent body of 2 mm or more, wrinkles and twists are generated in the absorbent body due to the shrinkage of the exterior sheet, which is liable to cause side leakage.
  • the basis weight of the absorber is 200 g / m 2 or less, more desirably 150 g / m 2 or less.
  • the absorbent body is not provided, or if the absorbent body is thin and the absorbent capacity is small, it is desirable that through holes are not formed or few in the elastic film.
  • the melting point of the elastic film 30 is set higher than the melting points of the first sheet layer 21 and / or the second sheet layer 22, but the joining portion is formed, but the through hole is not formed.
  • 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.
  • tape-type disposable diapers 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 laminated back sheet 1 forming the back surface and the liquid-permeable top sheet 2. 3 is interposed.
  • the liquid-impermeable laminated back sheet 1 extends outward from the periphery of the absorbent body 3 and blocks movement of excrement absorbed by the absorbent body 3 to the back surface side.
  • a sheet having moisture permeability can be used without impairing water shielding from the viewpoint of preventing stuffiness.
  • the entire back surface of the laminated back sheet 1 is covered with a nonwoven fabric layer (the first sheet layer 21 or the second sheet layer 22 described above), and both sheets 1 and 2 are covered.
  • the outer peripheral edge of the diaper extends to the outer peripheral edge of the diaper.
  • a spunbonded nonwoven fabric is suitable as the nonwoven fabric layer.
  • top sheet As the top sheet 2, a perforated or non-porous nonwoven fabric or a perforated plastic sheet is used.
  • material fiber constituting the nonwoven fabric synthetic fibers such as polyethylene or polypropylene, synthetic fibers such as polyester and amide, 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 outward from the periphery of the absorber 3, and a portion extending outward from the side edge of the absorber 3 is fixed to the laminated back sheet 1 with, for example, a hot melt adhesive.
  • the dot pattern in a figure represents the adhering part.
  • the leg gathering three-dimensional gather sheets 4 and 4 can use various non-woven fabrics (preferably spunbond non-woven fabrics), plastic films similar to those used for back sheets, or these stretchable sheets. From the viewpoint of the touch, 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.
  • region materials are being fixed with the hot-melt-adhesive agent etc. in the state extended
  • a plurality of the elongated elastic elastic members 4G are provided with a predetermined interval, but one may be used. As shown in FIG.
  • this free portion is formed by a three-dimensional gathering around the legs that stands on the use surface of the diaper (the surface of the top sheet 2 in the illustrated embodiment). Constitute.
  • 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 first sheet layer 21 and the second sheet layer 22 can be used without particular limitation as long as it is a sheet, but it is preferable to use a nonwoven fabric from the viewpoint of air permeability and flexibility.
  • 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 (particularly 0.25 to 1.0 mm 2 ) Area ratio of the joint 40: 16 to 45% (especially 25 to 45%)
  • Main stretchable region 84 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 stretch region Area of the joint 40: 0.14 to 3.5 mm 2 (particularly 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 intersect each other), etc.
  • the group of joints 40 (in which these are inclined at an angle of less than 90 degrees with respect to the expansion / contraction direction)
  • group of joints 40 (group unit arrangement may be regular or irregular, and may be a pattern, a character shape, etc.) shall be regularly repeated. You can also.
  • the arrangement form of the joint 40 and the through holes 31 may be the same in the main stretchable region 84, the transition stretchable region, 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 the thing in which many holes and slits were formed for ventilation other than a non-porous thing can also 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 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 a rectangular shape having 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 has been pre-dried, it is left in a test room or apparatus in a standard state (test location is temperature 20 ⁇ 5 ° C., 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 automatically measured using an automatic thickness measuring instrument (KES-G5 handy compression measurement program) under the conditions of load: 10 gf / cm 2 and pressure area: 2 cm 2 . ⁇ If there is no description about the environmental conditions in the test and measurement, 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 an elastic structure, such as a pants-type disposable diaper as in the above example, various disposable diapers such as a tape type and a pad type, and sanitary napkins.

Abstract

L'invention concerne un article absorbant ayant des régions élastiques, la contrainte d'étirement différant selon l'emplacement dans les régions élastiques. L'invention concerne un article absorbant ayant une feuille élastique (1), la feuille élastique (1) ayant un film élastique (30), qui est capable de s'étirer dans au moins la direction longitudinale, stratifiée entre une première couche de feuille (21) et une seconde couche de feuille (22) qui ne s'étirent pas, et la première couche de feuille (21) et la seconde couche de feuille (22) sont reliées directement ou avec le film élastique (30) entre elles par l'intermédiaire d'un certain nombre de joints (40) qui sont espacés à certains intervalles ; la feuille élastique (1) se contracte en raison de la force de contraction du film élastique (30), et peut être étirée par application d'une force externe dans la direction longitudinale ; et la contrainte d'étirement dans la direction longitudinale est différente entre la région centrale et les régions latérales dans la direction de largeur de la feuille élastique (1) en raison de différences de rapports de surface de joint, qui représentent l'aire totale occupée par les joints (40) contenus dans une unité de surface.
PCT/JP2016/052814 2015-01-30 2016-01-29 Article absorbant ayant des régions élastiques WO2016121984A1 (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
JP2015195467A JP6052747B1 (ja) 2015-09-30 2015-09-30 伸縮領域を有する吸収性物品
JP2015-195467 2015-09-30

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Citations (6)

* 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
JP2004000465A (ja) * 2002-03-22 2004-01-08 Kao Corp 吸収性物品
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 (6)

* 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
JP2004000465A (ja) * 2002-03-22 2004-01-08 Kao Corp 吸収性物品
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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