WO2016103435A1 - Feuille de stratification et appareil et procédé pour sa fabrication - Google Patents

Feuille de stratification et appareil et procédé pour sa fabrication Download PDF

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Publication number
WO2016103435A1
WO2016103435A1 PCT/JP2014/084460 JP2014084460W WO2016103435A1 WO 2016103435 A1 WO2016103435 A1 WO 2016103435A1 JP 2014084460 W JP2014084460 W JP 2014084460W WO 2016103435 A1 WO2016103435 A1 WO 2016103435A1
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WO
WIPO (PCT)
Prior art keywords
sheet
concave
roll
bulging
sheets
Prior art date
Application number
PCT/JP2014/084460
Other languages
English (en)
Japanese (ja)
Inventor
誠司 渡邊
忠 川上
Original Assignee
新興機械株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新興機械株式会社 filed Critical 新興機械株式会社
Priority to JP2016565790A priority Critical patent/JPWO2016103435A1/ja
Priority to PCT/JP2014/084460 priority patent/WO2016103435A1/fr
Publication of WO2016103435A1 publication Critical patent/WO2016103435A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—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
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • 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
    • 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
    • A61F13/51—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 outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary

Definitions

  • the present invention relates to a laminated sheet composed of two stretchable sheets, a production apparatus and a production method for the laminated sheet.
  • a laminated sheet of the present invention is suitably used for a portion that comes into contact with the human body, and the present invention is suitable for the production of such a laminated sheet. .
  • an absorbent body including superabsorbent polymer particles is covered with a plurality of sheets.
  • a top sheet also referred to as a top sheet or an upper layer sheet
  • a second sheet intermediate sheet, or intermediate sheet
  • a lower sheet is also provided
  • an exterior sheet also referred to as a back sheet or a main body sheet
  • the top sheet and the second sheet are required to be liquid-permeable
  • the exterior sheet is required to be non-liquid-permeable.
  • the second sheet also has a backflow prevention function.
  • a large number of bulging portions are formed on the top sheet on the contact side with the human body (skin).
  • an embossing roll comprising a concave roll having a plurality of concave portions on the peripheral surface and a convex roll having a plurality of convex portions corresponding to the concave portions on the peripheral surface.
  • the top sheet contracts when released from the pressing force (pressing force) between the embossing rolls and the tension (tensile load) at the time of supply.
  • the plurality of bulges formed on the top sheet in one step contracts (deforms) individually in the recesses of the embossing roll, so that they may be crushed (that is, abnormally deformed) or dropped from the recesses. It tends to be easier.
  • the second sheet may be stuck in the second stage, and the absorptivity and touch uniformity may be impaired.
  • Patent Document 3 in order to prevent the embossing roll from falling off from the concave portion, a structure in which the bulging portion of the top sheet is brought into close contact with the concave portion of the embossing roll by air suction must be added.
  • the first sheet (top sheet) and the second sheet (second sheet) are overlapped and simultaneously embossed so that the second sheet bulge is located inside the bulge of the top sheet. Fits in without gaps. In this manner, by integrating both the bulging portions and thus both the sheets, it is possible to prevent the bulging portions from falling off (separation), simplify the process, and the like.
  • the bulging part of the top sheet and the bulging part of the second sheet are integrated, the thickness increases, and the absorbability and the touch may be deteriorated.
  • JP 2014-188129 A Japanese Patent No. 5329806 Japanese Patent No. 4711943 Japanese Patent No. 5524792 Japanese Patent No. 5065037
  • An object of the present invention is to provide a laminated sheet that is excellent in buffering performance and heat retaining performance and has good tactile sensation. Moreover, the other subject of this invention is providing the manufacturing apparatus and manufacturing method for manufacturing such a lamination sheet easily and cheaply.
  • the laminated sheet of the present invention is A laminate sheet composed of two (for example, non-woven fabric) sheets having elasticity, Among these two sheets, the first sheet located on one side in the stacking direction is formed with a plurality of first bulging portions that bulge in a hollow shape only on one side, and on the other side in the stacking direction.
  • a plurality of second bulge portions that bulge in a hollow shape only on one side are formed in the second sheet positioned, and the first flat portion of the first sheet is around the first bulge portion and A plurality of spot joints that join the two sheets in a dotted, linear, or planar manner around the second bulging portion and an overlapping area with the second flat portion of the second sheet Formed,
  • the first bulge portion formed on the first sheet and the second bulge portion formed on the second sheet (for example, having a similar shape to each other) are arranged on the base end side of the first bulge portion.
  • the second bulging portion is fitted inside, and a predetermined gap is provided between the first bulging portion and the second bulging portion at least on the tip top side.
  • Such a laminated sheet is a double air layer between a gap formed between the first bulging portion and the second bulging portion of the two sheets and a hollow second bulging portion of the second sheet. It has excellent cushioning performance (double cushion function) and heat retention performance (double blanket function), and the tactile sensation is also improved.
  • the laminated sheet of the present invention is It consists of two sheets (for example, made of nonwoven fabric) having stretchability and liquid permeability, and is a laminated sheet used for an article for absorbing body fluid,
  • the first sheet that is located on one side in the laminating direction and contacts the human body is formed with a plurality of first bulging portions that bulge in a hollow shape only on one side
  • the second sheet located on the other side of the direction is also formed with a plurality of second bulging portions that bulge in a hollow shape only on one side, and is around the first bulging portion
  • Two sheets are joined in a dotted, linear, or planar shape to the overlapping area between the first flat portion and the second bulging portion and the second flat portion of the second sheet.
  • a plurality of spot joints are formed,
  • the first bulge portion formed on the first sheet and the second bulge portion formed on the second sheet (for example, having a similar shape to each other) are arranged on the base end side of the first bulge portion.
  • the second bulging portion is fitted inside, and a predetermined gap is provided between the first bulging portion and the second bulging portion at least on the tip top side.
  • Such a laminated sheet is a double air layer between a gap formed between the first bulging portion and the second bulging portion of the two sheets and a hollow second bulging portion of the second sheet. And exhibits excellent buffer performance (double cushion function) and heat retention performance (double blanket function) to improve the tactile sensation. Further, since the first bulging portion and the second bulging portion are not overlapped by forming the gap, the absorbability of the body fluid absorbing article is also improved.
  • the laminated sheet of the present invention when used for an article for absorbing body fluids such as disposable diapers and sanitary napkins, the first sheet is applied as a top sheet and the second sheet is applied as a second sheet.
  • the porous or non-porous nonwoven fabric mainly comprised by an elastomer fiber, a porous plastic sheet, etc. can be used, for example.
  • the gap is such that the minimum dimension CL in the laminating direction is equal to or greater than the total thickness t of the first sheet and the second sheet, and the average bulge of the first bulge and the second bulge. It can be in the range of height H or less (t ⁇ CL ⁇ H).
  • the manufacturing apparatus of the lamination sheet of this invention is the following.
  • An apparatus for producing a laminated sheet composed of two (for example, non-woven fabric) sheets having elasticity, A first concave roll having a plurality of concave portions on the peripheral surface and a second convex roll having a plurality of convex portions corresponding to the concave portions on the peripheral surface are arranged to be rotatable and supplied between both rolls.
  • Embossed molding parts for embossing each of a plurality of bulging parts that bulge in a hollow shape inside the recesses with respect to two sheets; A point-like shape with respect to the overlap region of the supplied two sheets disposed opposite the first concave roll at a position a predetermined distance away from the second convex roll on the downstream side in the rotation direction of the first concave roll A fixing portion for forming a plurality of spot joint portions that are joined in a linear or planar manner,
  • a predetermined radial force i.e., pressing force
  • the predetermined tensions i.e., pressing force
  • the second bulging portion formed on the second sheet to be in contact with each other has a similar shape, and is simultaneously and integrally molded in a form in which the latter is fitted inside the former,
  • the convex part of the second convex roll is retracted from the concave part of the first concave roll.
  • the protruding portions are released from the pressing force and the tension, respectively, and are deformed by contraction in the moving direction while rotating together with the first concave roll.
  • the amount of contraction in the moving direction of the second sheet is the first amount.
  • a predetermined gap is formed at least on the tip top side between the first bulge portion and the second bulge portion, In the fixing portion, the first bulging portion being contracted and deformed while forming the gap, the first flat portion of the first sheet, and the second bulging portion.
  • a plurality of the spot joints for fixing two sheets are formed in an overlapping region with the second flat portion of the second sheet.
  • the manufacturing method of the lamination sheet of the present invention A method for producing a laminated sheet comprising two (for example, non-woven fabric) sheets having elasticity, A first concave roll having a plurality of concave portions on the peripheral surface and a second convex roll having a plurality of convex portions corresponding to the concave portions on the peripheral surface are arranged to be rotatable and supplied between both rolls.
  • each of the first concave rolls has a predetermined radial force (that is, pressing force) while the convex part of the second convex roll enters the concave part of the first concave roll.
  • the second bulge portion formed on the second sheet in contact with the convex portion has a similar shape to each other, and is simultaneously and integrally embossed in a form in which the latter is fitted inside the former,
  • the shrinking step on the discharge side of the embossed molded part the first bulging part accommodated inside the concave part and the convex part of the second convex roll are retracted from the concave part of the first concave roll, and
  • Each of the second bulging portions is released from the pressing force and the tension, and is deformed by contraction in the moving direction while rotating together with the first concave roll.
  • the contraction amount in the moving direction of the second sheet is reduced.
  • a predetermined gap is formed at least on the top end side between the first bulging portion and the second bulging portion,
  • the first bulging part is being contracted and deformed while forming the gap, and the first flat part of the first sheet and the second bulging part.
  • a plurality of spot joining portions for fixing two sheets are formed in an overlapping area with the second flat portion of the second sheet.
  • the first bulge formed on the first sheet when the pressing force acting between the two rolls and the tension applied to each supply sheet are released.
  • the second bulging portion formed on the portion and the second sheet contracts and deforms from the overlapping state in the concave portion of the first concave roll, and a gap is formed between the bulging portions.
  • these bulging parts are not easily crushed (abnormal deformation) or fall off from the recesses, so there is no hindrance to the formation of spot joints, and buffer performance and heat retention performance (in body fluid absorbing articles) Does not particularly impair the uniformity of touch and absorbency.
  • the shrinkage amount of the second sheet is larger than the shrinkage amount of the first sheet, the gap constituting the double air layer can be easily and inexpensively formed on the laminated sheet.
  • the tension of the second sheet is set to be larger than the tension of the first sheet among the two sheets to be supplied.
  • a heating element for forming is incorporated only in the first concave roll among the first concave roll and the second convex roll.
  • the shape of the first sheet (of the first bulging portion) is quickly stabilized by heating during embossing, so the contraction of the first sheet (of the first bulging portion) when the pressing force and tension are released.
  • the amount can be made relatively small.
  • the difference in the amount of contraction (of the bulging portion) between both sheets is enlarged, and the formation of a gap is facilitated.
  • the diameter of the first concave roll is larger than the diameter of the second convex roll.
  • the first bulging portion is held on the bottom side of the concave portion of the large-diameter first concave roll, and is difficult to move or come off to the opening side of the concave portion.
  • the second bulging portion located on the opening side in the recess tends to contract in the recess when the pressing force and tension are released.
  • the difference in the amount of contraction (of the bulging portion) between both sheets is enlarged, and the formation of a gap is facilitated.
  • the diameter of the first concave roll is larger than the diameter of the second convex roll, the degree of freedom of the shape, size, number of arrangement, layout, and the like of the bulging portion and the spot joint portion is increased.
  • a smooth roll having a flat peripheral surface and containing a heating element for bonding is disposed so as to be opposed to the first concave roll across the first sheet and the second sheet.
  • the first concave roll is formed with a plurality of protrusions that rise in a step shape from the peripheral surface at a position corresponding to the spot joint portion around the concave portion, A spot joint is formed by heating the first sheet and the second sheet by the first concave roll and the smooth roll.
  • both sheets can be fixed in a short time in a gap-formed state and during shrinkage deformation.
  • One or more smooth rolls can be installed according to the sheet material, thickness, shape, size, number of arrangements, layout, etc. of the spot joints, and smooth rolls according to the formation status of the spot joints. You can also adjust the number of running.
  • the fixing unit is an ultrasonic vibration unit for bonding, which is disposed to face the first concave roll with the first sheet and the second sheet interposed therebetween, and the ultrasonic wave of the second sheet by the ultrasonic vibration unit A spot junction is formed by vibration.
  • the ultrasonic wave is applied to the second sheet by the heating element and the ultrasonic vibration part built in the first concave roll, and the overlapping region between the first flat part and the second flat part is fused to be plural.
  • both sheets can be fixed in a short time in a gap formation state and during shrinkage deformation.
  • FIG. 2 is a cross-sectional explanatory view taken along line AA in FIG. 1.
  • Explanatory drawing which expands the B section of FIG. 1 and shows the planar structure of a lamination sheet.
  • the front view which shows an example of the lamination sheet manufacturing apparatus which concerns on this invention.
  • Explanatory drawing which expands the D section of FIG. 5 and shows with the manufacturing process of a lamination sheet.
  • Explanatory drawing which expands the F section of FIG. 5 and shows with the manufacturing process of a lamination sheet.
  • the front view which shows the modification of a lamination sheet manufacturing apparatus instead of FIG.
  • Explanatory drawing which shows the deformation
  • FIG. 1 to FIG. 4 show specific examples when the laminated sheet according to the present invention is used in a disposable diaper.
  • the disposable diaper 9 shown in FIG.1 and FIG.2 is an example of what is called a bodily fluid absorption article, and is also called “tape type paper diaper”.
  • the absorbent body 7 located substantially at the center of the disposable diaper 9 is formed into various shapes such as a flat plate shape containing superabsorbent polymer particles, and the periphery is covered with a plurality of sheets.
  • a top sheet (hereinafter referred to as a first sheet) 1 that is in direct contact with the skin on the human body side (that is, a body fluid absorption side) of the absorbent body 7 or a second sheet positioned between the first sheet 1 and the absorbent body 7.
  • a sheet (hereinafter referred to as a second sheet) 2 is provided, and an exterior sheet 6 having a fastening tape 8 is provided on the side opposite to the human body (that is, the body fluid non-absorbing side).
  • These sheets 1, 2, 6 are made of a stretchable nonwoven fabric, the first sheet 1, the second sheet 2 are liquid permeable, and the exterior sheet 6 is non-liquid permeable.
  • the first sheet 1 and the second sheet 2 constitute a laminated sheet 5 and are arranged so that the first sheet 1 is located on the contact side with the human body.
  • seat 1 is formed with many 1st bulging parts 1a which bulge in hollow shape only from one side (human body side) from the flat 1st flat part 1b.
  • the second sheet 2 is also formed with a number of second bulging portions 2a that bulge in a hollow shape only on one side (the human body side) from the flat second flat portion 2b.
  • the two sheets 1 and 2 are numerous.
  • the first bulging portion 1a and the second bulging portion 2a are configured such that the second bulging portion 2a is fitted inside the first bulging portion 1a on the base end side, and the first bulging portion is on the distal end top portion side. There is a gap 4 between the protruding portion 1a and the second bulging portion 2a.
  • FIG. 3 shows an example of the planar structure of the laminated sheet 5, and the bulging portions 1a and 2a associated with each other overlap in a hat shape, and the overlapping structure of such bulging portions 1a and 2a is staggered (obliquely crossed) Arranged). Moreover, the spot junction part 3 is arranged in the position which divides the circumference into six equal parts with respect to the overlapping structure of the bulging parts 1a and 2a. Since the two sheets 1 and 2 are fixed only at these spot joint portions 3, the internal space of the gap 4 adjacent to each other and the second bulging portion 2a adjacent to each other is the same as that of the flat portions 1b and 2b. Communication is possible by a non-bonding overlap region or the like.
  • FIG. 4 shows an example of the cross-sectional structure of the laminated sheet 5, and the outer first bulging portion 1 a has a cylindrical shape in which the tip top portion side is closed with a semi-ellipsoid that halves the rugby ball or the fruit of the insulator.
  • the inner second bulging portion 2a is also formed in a similar shape.
  • the lamination sheet 5 has a double air layer of the clearance gap 4 formed between the 1st bulging part 1a and the 2nd bulging part 2a, and the hollow 2nd bulging part 2a.
  • Excellent cushioning performance double cushion function
  • thermal insulation performance double blanket function
  • the absorptivity of the disposable diaper 9 also improves.
  • FIG. 5 shows an example of a laminated sheet manufacturing apparatus according to the present invention.
  • a laminated sheet manufacturing apparatus 100 shown in FIG. 5 simultaneously embosses a plurality of bulging portions 1a and 2a (see FIG. 6) on two sheets 1 and 2 supplied simultaneously (embossing).
  • the first sheet 1 pulled out from the first sheet supply reel 101a is given a predetermined tension by the first tension adjuster 101b and is continuously supplied to the embossing forming unit 10, and is supplied from the second sheet supply reel 102a.
  • the pulled-out second sheet 2 is given a predetermined tension by the second tension adjuster 102 b and is continuously supplied to the embossed molding unit 10.
  • both the sheets 1 and 2 are joined by the fixing unit 20, and are continuously wound around the take-up reel 103 as the laminated sheet 5.
  • Both the first sheet 1 and the second sheet 2 have stretchability and liquid permeability, and are made of, for example, a nonwoven fabric having the same material and the same thickness.
  • the laminated sheet 5 is cut into an appropriate length and used for a disposable diaper 9 (see FIGS. 1 and 2).
  • the embossing part 10 has a plurality of recesses 11a on the peripheral surface and a first concave roll 11 positioned below, and a plurality of convex portions 12a corresponding to the recesses 11a on the peripheral surface and a second protrusion positioned above.
  • the embossing roll which consists of the roll 12 is provided, and both the rolls 11 and 12 are arrange
  • Each of the tension adjusters 101 b and 102 b is set so that the tension of the second sheet 2 out of the two sheets 1 and 2 supplied to the embossing forming unit 10 is larger than the tension of the first sheet 1.
  • the first concave roll 11 has a main heater 11h (heating element for forming, heating element for bonding) built therein.
  • the main heater 11h mainly heats the first sheet 1 when the supply sheets 1 and 2 are pressed by the embossing rolls 11 and 12, so that the first sheet 1 (particularly the first bulging portion 1a) has an early embossed shape. To stabilize and suppress deformation. Therefore, the amount of contraction of the first sheet 1 (particularly, the first bulging portion 1a) after mold pressing (that is, when the pressing force and tension are released) is relatively small.
  • the main heater 11h cooperates with the first fusing heater 21h (or the second fusing heater 22h) incorporated in the first smoothing roll 21 (or the second smoothing roll 22), which will be described later, and both sheets 1, 2. And a plurality of spot joints 3 are formed by fusing.
  • the diameter of the outer peripheral surface of the first concave roll 11 is larger than the diameter of the outer peripheral surface of the second convex roll 12.
  • the diameter of the first concave roll 11 is larger than the diameter of the second convex roll 12, the shape, size, number of arrangement, and layout of the bulging portions 1a and 2a and the spot joint portion 3 (see FIG. 4). Etc.
  • the degree of freedom increases. For example, since the small-diameter second convex roll 12 can be disposed above the large-diameter first concave roll 11, the bulging heights H1, H2 (see FIG. 4), etc., depending on the material and thickness of the sheets 1, 2 When changing, it may be sufficient to replace the lightweight second convex roll 12.
  • the fixing unit 20 shown in FIG. 5 is the same as the first smooth roll 21 located about 90 ° away from the second convex roll 12 on the downstream side in the rotation direction of the first concave roll 11 and the second smooth roll 21 located about 180 ° apart.
  • Each of the rolls 21 and 22 is disposed so as to be rotatable facing the first concave roll 11 with the first sheet 1 and the second sheet 2 interposed therebetween.
  • Each of the smooth rolls 21 and 22 has a flat outer peripheral surface having substantially the same diameter, and incorporates fusion heaters 21h and 22h (joining heating elements) and has substantially the same structure.
  • the main heater 11h and the first fusion heater 21h (or A plurality of spot joint portions 3 are formed by fusion on both sheets 1 and 2 heated by the second fusion heater 22h) (see FIG. 7 (or FIG. 8)).
  • the diameter of the outer peripheral surface of the first smooth roll 21 (or the second smooth roll 22) is smaller than the diameter of the outer peripheral surface of the first concave roll 11 and larger than the diameter of the outer peripheral surface of the second convex roll 12.
  • the first concave roll 11 is formed with a plurality of protrusions 11b that rise in steps from the peripheral surface of the first concave roll 11 at a position corresponding to the spot joining portion 3 in the periphery (periphery) of the concave portion 11a. ing.
  • protrusions 11b are pressed by the outer peripheral surface of the first smooth roll 21 (or the second smooth roll 22) in the fixing unit 20, they are the surfaces of the first sheet 1 (first flat portion 1b) and spot bonded.
  • a dent 1b1 (a kind of trace) is formed at a position corresponding to the portion 3.
  • Example of laminated sheet manufacturing method 6 to 8 show an example of a method for producing a laminated sheet according to the present invention, and show a process for producing the laminated sheet shown in FIGS. 3 and 4 using the laminated sheet producing apparatus shown in FIG.
  • the 1st bulging part 1a is formed in the 1st sheet
  • the 2nd bulging part 2a is formed in the 2nd sheet
  • the first bulging portion 1a and the second bulging portion 2a are similar to each other (in the figure, a bottomed cylindrical shape), and the second bulging portion 2a is fitted inside the first bulging portion 1a. It is simultaneously and integrally molded inside the recess 11a.
  • the second bulge portion 2a is more than the first bulge portion 1a.
  • the gap 4 is further reduced, and a gap 4 is formed between the first bulging portion 1a and the second bulging portion 2a on the top end side.
  • the gap 4 between the bulging portions 1 a and 2 a according to the difference in shrinkage between the sheets 1 and 2 (in this embodiment, it is also the tension difference during the embossing process). Gradually expands.
  • ⁇ Second joining step> (See FIGS. 5 and 8)
  • the two sheets 1 and 2 supplied between the first concave roll 11 and the second smooth roll 22 are heated again by the main heater 11h and the second fusing heater 22h, and the first flat portion 1b and the second flat roll 1b.
  • Spot joints 3 and dents 1b1 (see FIG. 4) are replenished and formed in regions that are overlapped with the flat part 2b and are not joined or insufficiently joined in the first joining step.
  • the second joining step in this embodiment complements the first joining step.
  • the laminated sheet 5 shown in FIGS. 3 and 4 can be manufactured through the above-described steps.
  • the laminated sheet 5 having a double air layer between the gap 4 formed between the first bulging portion 1a and the second bulging portion 2a and the hollow second bulging portion 2a. Can be manufactured easily and inexpensively.
  • first joining step first smoothing roll 21
  • second joining step second smoothing roll 22
  • the time during which the sheets 1 and 2 continue to contract is not constant depending on various conditions. There may be a case where the process continues until after the second bonding process, or a case where the spot bonding part 3 continues until the temperature reaches room temperature.
  • FIG. 9 shows a modification of the laminated sheet manufacturing apparatus.
  • an ultrasonic vibration unit 121 for bonding is provided instead of the first smooth roll 21 in FIG. 5, and the second smooth roll 22 is not provided.
  • the ultrasonic vibration unit 121 is disposed to face the first concave roll 11 with the first sheet 1 and the second sheet 2 interposed therebetween, and forms the spot bonding unit 3 by ultrasonically vibrating the second sheet 2.
  • the main heater 11h and the ultrasonic vibration unit 121 built in the first concave roll 11 impart ultrasonic vibration to the second sheet 2, and the overlapping region of the first flat portion 1b and the second flat portion 2b.
  • the spot joint 3 By forming the spot joint 3 by fusing the two, the sheets 1 and 2 can be fixed in a short time in a state where the gap 4 is formed and during shrinkage deformation.
  • FIG. 10 shows a modified example of the laminated sheet.
  • the first bulging portion 1 a has a small amount of contraction compared to FIG.
  • the second bulging portion 2a has a larger amount of contraction than that of FIG. 4
  • the tip top portion contracts in a hemispherical shape, and a gap 4 is also formed between the peripheral surface of the first bulging portion 1a.
  • the laminated sheet used for the disposable diaper and the production apparatus and production method for the laminated sheet have been described, but the laminated body used for other purposes as well as articles for absorbing body fluid other than the disposable diaper.
  • the present invention can also be carried out on sheets.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention est caractérisée en ce que, du côté d'éjection d'une section de moulage de gaufrage (immédiatement après une étape de gaufrage), tandis que des parties convexes 12a d'un deuxième rouleau convexe 12 sont retirées de parties concaves 11a d'un premier rouleau concave 11, chaque partie parmi des premières parties 1a de dilatation et des deuxièmes parties 2a de dilatation immédiatement après avoir subi un moulage de gaufrage et avoir été logées à l'intérieur des parties concaves 11a dans un état de recouvrement est libérée d'une force de pression et d'une force de traction. À cet instant, le degré de contraction d'une deuxième feuille 2 dans un sens de mouvement est supérieur à celui d'une première feuille 1. Par conséquent, les deuxièmes parties 2a de dilatation deviennent encore plus petites que les premières parties 1a de dilatation, des écarts 4 étant alors formés entre les premières parties 1a de dilatation et les deuxièmes parties 2a de dilatation du côté des sommets de leurs pointes. Ainsi, une feuille de stratification dotée d'excellentes performances d'absorption des chocs et d'excellentes propriétés de rétention de la chaleur, et qui est douce au toucher, est réalisée. De plus, un appareil et un procédé pour la fabrication facile et économique d'une telle feuille de stratification sont décrits.
PCT/JP2014/084460 2014-12-26 2014-12-26 Feuille de stratification et appareil et procédé pour sa fabrication WO2016103435A1 (fr)

Priority Applications (2)

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JP2016565790A JPWO2016103435A1 (ja) 2014-12-26 2014-12-26 積層シート、その製造装置及び製造方法
PCT/JP2014/084460 WO2016103435A1 (fr) 2014-12-26 2014-12-26 Feuille de stratification et appareil et procédé pour sa fabrication

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JPH04312431A (ja) * 1991-04-09 1992-11-04 Kao Corp 研磨用シート及びその製造方法
JPH06255006A (ja) * 1992-12-29 1994-09-13 Kimberly Clark Corp ストレッチによってピロー部を形成した嵩のある積層材料及びその製造方法
JPH08216310A (ja) * 1995-02-17 1996-08-27 Nippon Kyushutai Gijutsu Kenkyusho:Kk 多孔性溶結複合体シート及びその製造法
JPH11286863A (ja) * 1998-04-06 1999-10-19 Mitsui Chem Inc 立体賦形不織布
JP2000271170A (ja) * 1999-03-25 2000-10-03 Uni Charm Corp 表面構造体を有する吸収性物品
JP2001517564A (ja) * 1997-09-19 2001-10-09 ザ、プロクター、エンド、ギャンブル、カンパニー はり合わせ繊維構造体およびその製造方法
JP2008155602A (ja) * 2006-12-26 2008-07-10 Kao Corp 複合シートの製造方法
JP2008161526A (ja) * 2006-12-28 2008-07-17 Kao Corp 吸収性物品用の表面シート
JP2009118920A (ja) * 2007-11-12 2009-06-04 Kao Corp 吸収性物品の表面シート
JP2013248012A (ja) * 2012-05-30 2013-12-12 Daio Paper Corp 吸収性物品用表面材の製造方法
JP2014034145A (ja) * 2012-08-08 2014-02-24 Kao Corp 複合シートの製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04312431A (ja) * 1991-04-09 1992-11-04 Kao Corp 研磨用シート及びその製造方法
JPH06255006A (ja) * 1992-12-29 1994-09-13 Kimberly Clark Corp ストレッチによってピロー部を形成した嵩のある積層材料及びその製造方法
JPH08216310A (ja) * 1995-02-17 1996-08-27 Nippon Kyushutai Gijutsu Kenkyusho:Kk 多孔性溶結複合体シート及びその製造法
JP2001517564A (ja) * 1997-09-19 2001-10-09 ザ、プロクター、エンド、ギャンブル、カンパニー はり合わせ繊維構造体およびその製造方法
JPH11286863A (ja) * 1998-04-06 1999-10-19 Mitsui Chem Inc 立体賦形不織布
JP2000271170A (ja) * 1999-03-25 2000-10-03 Uni Charm Corp 表面構造体を有する吸収性物品
JP2008155602A (ja) * 2006-12-26 2008-07-10 Kao Corp 複合シートの製造方法
JP2008161526A (ja) * 2006-12-28 2008-07-17 Kao Corp 吸収性物品用の表面シート
JP2009118920A (ja) * 2007-11-12 2009-06-04 Kao Corp 吸収性物品の表面シート
JP2013248012A (ja) * 2012-05-30 2013-12-12 Daio Paper Corp 吸収性物品用表面材の製造方法
JP2014034145A (ja) * 2012-08-08 2014-02-24 Kao Corp 複合シートの製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112172186A (zh) * 2019-07-05 2021-01-05 石家庄顺美生活用纸科技有限公司 一种一次性卫生用品生产线上超声凸凹膜材料成型装置

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