WO2013094591A1 - Article porté de type sous-vêtement - Google Patents

Article porté de type sous-vêtement Download PDF

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Publication number
WO2013094591A1
WO2013094591A1 PCT/JP2012/082760 JP2012082760W WO2013094591A1 WO 2013094591 A1 WO2013094591 A1 WO 2013094591A1 JP 2012082760 W JP2012082760 W JP 2012082760W WO 2013094591 A1 WO2013094591 A1 WO 2013094591A1
Authority
WO
WIPO (PCT)
Prior art keywords
pants
side seal
width direction
layer sheet
wearing article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/082760
Other languages
English (en)
Japanese (ja)
Inventor
潤一 山下
晃央 森田
小林　賢司
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kao Corp
Original Assignee
Kao Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kao Corp filed Critical Kao Corp
Priority to CN201280063760.6A priority Critical patent/CN104010612B/zh
Publication of WO2013094591A1 publication Critical patent/WO2013094591A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/496—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs
    • A61F13/4963—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 specially adapted to be worn around the waist, e.g. diapers, nappies in the form of pants or briefs characterized by the 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
    • 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
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8215—Tensile tests
    • 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
    • B29C66/01—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
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/431—Joining the articles to themselves
    • 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
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/70—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
    • B29C66/72941—Non woven mats, e.g. felt coated
    • 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
    • B29C66/71—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 composition of the plastics material of the parts to be joined
    • 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 a pants-type wearing article.
  • the pant-type wearing article of the present invention is particularly preferably used as a pant-type absorbent article such as a pant-type disposable diaper or a pant-type sanitary short.
  • the side seal portion of the pants-type disposable diaper is required to maintain a strong bond when the article is worn, and is required to be easily peelable when discarded. In addition, it is also required to improve the softness of the side seal part while maintaining strong bonding.
  • the present invention comprises an abdominal part, a crotch part, and a dorsal part having an outer packaging material composed of an inner layer sheet located on the side close to the wearer's body and an outer layer sheet located on the side far from the wearer's body.
  • the present invention relates to a pants-type wearing article.
  • a plurality of elastic members extending in the width direction are arranged on the outer packaging material in the abdominal side and the back side, and both side edges of the abdomen and the back side It has a pair of side seal parts formed by superimposing and joining both side edges.
  • the side seal portion is formed by intermittently ultrasonically joining the side edge portions along the longitudinal direction of the article, and the elastic member is an adhesive between the outer layer sheet and the inner layer sheet.
  • the elastic member is fixed by the adhesive at both end regions of the elastic member, and the region to which the adhesive is applied is inward from the outer side edge in the width direction of the side seal portion.
  • the elastic member is in a non-joined state with the outer layer sheet and the inner layer sheet at a position between the both end regions.
  • FIG. 1 is a perspective view of a pants-type disposable diaper that is an embodiment of the present invention.
  • FIG. 2 is a developed plan view of the pants-type disposable diaper shown in FIG. 1 expanded and viewed from the absorbent main body side.
  • FIG. 3 is a cross-sectional view of the diaper shown in FIG. 1 when the side seal portion and the vicinity thereof are cut along the line II.
  • FIG. 4 is a schematic diagram showing a positional relationship between a bonding portion and an existing region of the adhesive in the side seal portion and its vicinity in the diaper shown in FIG.
  • FIG. 5 is an explanatory diagram of the dimensions of the joint portion in the side seal portion.
  • FIG. 6 is a schematic diagram showing the arrangement relationship of joints between joint rows in the side seal part.
  • FIG. 7 is a schematic diagram (corresponding to FIG. 4) showing the positional relationship between the bonding area and the adhesive existing region in the side seal portion and the vicinity thereof in another embodiment of the present invention.
  • FIG. 8 is an expanded plan view of a state in which a diaper according to another embodiment of the present invention is expanded and stretched as viewed from the absorbent main body side.
  • FIG. 1 and 2 show a pant-type disposable diaper as an embodiment of the pant-type wearing article of the present invention.
  • the pants-type disposable diaper 1 shown in these drawings has a plurality of elastic members 8 extending in the width direction of the diaper 1 at its abdominal side A and back side B. And it has a pair of side seal parts 7 and 7 formed by joining both side edge parts 6a and 6a of the ventral side part A and both side edge parts 6b and 6b of the back side part B.
  • the diaper 1 is formed symmetrically with respect to the longitudinal center line CL. Accordingly, in the following description, only one of the symmetrical parts will be mainly described.
  • the “Y” direction shown in each figure is the longitudinal direction of the diaper 1 connecting the ventral side A and the back side B, and this direction is parallel to the longitudinal center line CL.
  • the “X” direction shown in each figure is the width direction of the diaper 1 orthogonal to the longitudinal direction, and this direction is the direction orthogonal to the vertical center line CL.
  • the diaper 1 will be described in detail.
  • the diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable (including water-repellent) back sheet 3, and an absorbent body 4 interposed between both sheets 2 and 3. It has a substantially vertically long absorbent main body 5 and an outer packaging material 6 disposed on the side of the back sheet 3 of the absorbent main body 5 and bonded and fixed to the absorbent main body 5.
  • the outer packaging material 6 is composed of an outer layer sheet 61 and an inner layer sheet 62, the absorbent main body 5 is disposed on the inner layer sheet in the outer packaging material 6.
  • the diaper 1 has an abdominal part A, a crotch part C, and a dorsal part B in this order along the longitudinal direction (Y direction).
  • the ventral side A of the diaper 1 is a part located on the ventral side of the wearer when worn.
  • the back side part B is a part located on the wearer's back side.
  • the crotch part C is a part located in the wearer's crotch region.
  • the absorbent body 4 has a rectangular shape that is long in the longitudinal direction Y.
  • the top sheet 2 and the back sheet 3 are also rectangular, and are joined to each other at the portions extending from both end edges in the longitudinal direction Y of the absorber 4, and are also joined to each other at portions extending from both end edges in the width direction X. Has been. By joining in this way, a vertically long rectangular absorbent main body 5 is formed.
  • the outer packaging material 6 extends over the entire outer area of the absorbent main body 5, and is bound toward the inner side in the width direction X in the central area in the longitudinal direction Y. Then, the inner surfaces of both side edges 6a, 6a of the ventral side A of the outer packaging material 6 and the inner surfaces of both side edges 6b, 6b of the back side B are overlapped with each other and joined in a palm shape to form a pair of side seals
  • a pant-type diaper 1 having a waist opening WO and a pair of leg openings LO and LO is formed.
  • the outer packaging material 6 is formed of an outer layer sheet 61 and an inner layer sheet 62 as shown in FIG.
  • the inner layer sheet 62 is located on the side close to the wearer's body.
  • the outer layer sheet 62 is located on the side far from the wearer's body.
  • the outer layer sheet 61 constitutes the outermost surface of the diaper 1.
  • a plurality of elastic members 8 extending in the width direction of the diaper 1 are arranged between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer packaging material 6.
  • a waist elastic member 81, a waist elastic member 82 and a leg elastic member 83, which are elastic members 8, are arranged between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer packaging material 6, and
  • Each of the side edges 6a, 6a, 6b, 6b of A and the back side B has a waist elastic region (waist gather), a waistline elastic region (waistline gather), and a pair of leg elastic regions (leg gathers) that are annular. Is formed.
  • the waist elastic region (waist gather) is formed by intermittently arranging a plurality of waist elastic members 81 outward in the longitudinal direction (Y direction) from the absorbent main body 5 and fixing them in an extended state. ing.
  • the waistline elastic region (waistline gather) is arranged with a plurality of waistline elastic members 82 intermittently in the longitudinal direction (Y direction) at a position between the waist elastic member 81 and the constriction of the outer packaging material 6. It is formed by fixing in an extended state.
  • the waist elastic member 81 When viewed along the width direction X of the diaper 1, the waist elastic member 81 is disposed at a portion that does not overlap the absorbent main body 5. Specifically, the waist elastic member 81 is disposed between the longitudinal edge of the absorbent main body 5 and the waist opening end of the diaper 1. On the other hand, the waistline elastic member 82 is disposed in a portion overlapping the absorber 4 when viewed along the width direction X of the diaper 1.
  • the waistline elastic member 82 is disposed so as not to cross the absorber 4.
  • the waistline elastic member 82 preferably has an outer end portion in the width direction X that terminates inward in the width direction of the diaper 1 rather than the side seal portion 7. At the same time, the end inward in the width direction X terminates at the position of the side edge along the longitudinal direction Y of the absorbent body 4 or outside the side edge, or slightly exceeds the side edge. , Located below the absorber 4.
  • the leg elastic region has a plurality of leg elastic members 83 in the ventral side A, from one side edge 6a of the ventral side A (left side in FIG. 2) to one of the ventral side A ( 2 is fixed along the constriction on the left side of FIG. 2, crosses in the X direction in the center region in the Y direction of the crotch C, and the other side of the ventral side A along the constriction of the other side of the ventral side A (right side of FIG. 2). It is formed by being fixed in a stretched state until reaching the side edge 6a (right side in FIG. 2), and cutting at the center of the crotch C (part including the longitudinal center line CL).
  • leg elastic region in the back side portion B, a plurality of leg elastic members 83 are connected to the back side portion B from one side edge portion 6b of the back side portion B (left side in FIG. 2). 2 (the left side in FIG. 2) is fastened, crosses in the X direction at the center region in the Y direction of the crotch C, and the back side part along the other side (the right side in FIG. 2) It is fixed in an extended state until reaching the other side edge 6b of B (the right side in FIG. 2) and cut at the center of the crotch C.
  • the end portion of the diaper 1 that is closer to the outside in the width direction X terminates at a position that is inward of the side seal portion 7.
  • each side seal portion 7 includes a plurality of first joining portions 70 a formed by intermittently joining the side edge portions 6 a and 6 b along the longitudinal direction Y of the diaper 1. And a second joint row 71b composed of a plurality of second joint portions 70b.
  • the first joint portion row 71 a and the second joint portion row 71 b extend along the longitudinal direction Y of the diaper 1 and are disposed over the width direction X of the diaper 1.
  • columns 71a and 71b from a viewpoint of the intensity
  • FIG. 3 shows a cross-sectional view of the side seal portion 7 and the vicinity thereof in the diaper 1 shown in FIG. 1 cut along the line II in FIG. .
  • the side seal portion 7 includes a side edge portion 6a of the outer packaging material 6 constituting the ventral side portion A and a side edge portion 6b of the outer packaging material 6 constituting the back side portion B. 6 are overlapped so that the inner layer sheets 62 face each other, and are joined by joining portions 70a and 70b.
  • the waist elastic member 81, the waistline elastic member 82 and the leg elastic member 83 respectively disposed on the abdominal part A and the back side part B are disposed between the outer layer sheet 61 and the inner layer sheet 62 constituting the outer packaging material 6. Has been.
  • the end portions of the waist elastic member 81, the waistline elastic member 82, and the leg elastic member 83 that are closer to the outer side in the width direction of the diaper 1 are terminated at a position inward than the side seal portion 7. . That is, the end portions of the elastic members 81, 82, 83 that are closer to the outside in the width direction X of the diaper 1 do not exist in the side seal portion 7. Further, these elastic members 81, 82, 83 are fixed to these sheets 61, 62 only by the adhesive 9 between the outer layer sheet 61 and the inner layer sheet 62. That is, these elastic members 81, 82, 83 are not fixed to the outer layer sheet 61 and the inner layer sheet 62 by fixing means other than the adhesive 9.
  • these adhesives 9 are fixed at both end regions of these elastic members 81 and 82 as shown in FIG.
  • the elastic members 81, 82 are not joined to the outer layer sheet 61 and the inner layer sheet 62.
  • the non-bonded state large wrinkles and wrinkles are generated in the outer packaging material 6, so that a good wearing state can be obtained, and the side seal portion 7 and the bonded portions 70 a and 70 b are less noticeable and have a good appearance. Can be obtained.
  • the junction part which fixes the outer layer sheet 61 and the inner layer sheet 62 between the elastic members 81 and 82 adjacent in the longitudinal direction Y is this elastic member 81,82.
  • a plurality are provided so as not to pass (not shown).
  • the shape of the ridges and ridges of the outer packaging material 6 can be adjusted by the arrangement pattern of the joint portions.
  • FIG. 4 schematically shows a portion where the above-described adhesive 9 is applied.
  • the adhesive 9 is applied to the region D located inward from the side edge closer to the outer side in the width direction of the side seal portion 7.
  • region D which gave the adhesive agent 9 forms in the inner position of the width direction X of the diaper 1 rather than the inward side edge in the width direction of the side seal part 7.
  • the adhesive is not present. That is, the adhesive is not present between the outer layer sheet 61 and the inner layer sheet 62 constituting the side seal portion 7 and between one inner layer sheet 62 and the other inner layer sheet 62.
  • the adhesive 9 is applied to a substantially rectangular region D extending in the width direction X and the longitudinal direction Y of the diaper 1.
  • the adhesive 9 does not reach the side edge of the absorbent main body.
  • the adhesive 9 is applied at least in a region between the upper and lower ends of the side seal portion 7.
  • the region D includes all or part of the end regions of the elastic members 81 and 82.
  • the adhesive 9 is applied to the entire area of the outer layer sheet 61 and the inner layer sheet 62. “Applied to the entire area” does not need to be a solid coating, and includes, for example, the case where the adhesive 9 is applied in a spiral pattern or an ⁇ -shaped pattern.
  • ultrasonic bonding is employed in the present embodiment.
  • the side seal portion is often formed by fusion by heat embossing or adhesion by an adhesive, but unlike this, ultrasonic bonding is an essential means in this embodiment.
  • objects are bonded by frictional heat generated by ultrasonic vibration of a horn. Therefore, forming the side seal portion 7 by ultrasonic bonding has an advantage that the side seal portion 7 can be effectively prevented from exhibiting a hard feel.
  • the fibers are easily damaged by heat.
  • Employing ultrasonic bonding when bonding objects is effective because it can effectively prevent the side seal portion 7 from becoming hard while securing sufficient bonding strength.
  • a single resin fiber refers to a fiber having a uniform resin composition in the cross section of the fiber. Therefore, a single resin fiber includes not only a fiber composed of one kind of resin but also a fiber composed of a blend of two kinds of resins. However, composite fibers such as core-sheath type composite fibers and side-by-side type composite fibers are not included.
  • Non-woven fabrics composed only of single resin fibers include spunbond nonwoven fabrics, meltblown nonwoven fabrics, spunlace nonwoven fabrics, air-through nonwoven fabrics, needle punched nonwoven fabrics composed only of fibers such as polypropylene, polyethylene, and a blend of polypropylene and polyethylene. Etc. In particular, it is effective to employ ultrasonic bonding when a non-woven fabric composed only of polypropylene is used as the inner layer sheet 62.
  • junction parts 70a and 70b are intermittently formed along the longitudinal direction Y of the diaper 1, when forming the continuous junction part along the longitudinal direction Y of the diaper 1, In comparison, it can be reduced that the side seal portion 7 becomes hard. Forming the joint portions 70a and 70b formed intermittently is particularly effective when the inner layer sheet 62, which is the joint surface of the side seal portion 7, is made of a nonwoven fabric composed of only single resin fibers. .
  • the joining portions 70a and 70b are intermittently formed by employing ultrasonic joining, there is an advantage that the fiber located between the joining portions adjacent in the longitudinal direction Y of the diaper 1 is hardly damaged due to joining. is there. There is also an advantage that the seal strength of the side seal portion 7 can be improved.
  • the side seal portion 7 does not have an end region of the elastic member, the number of members constituting the side seal portion 7 can be reduced accordingly. Further, it is possible to prevent the side seal portion 7 from being bent and a corner from rising due to the contraction of the elastic member. Also by these, it can prevent effectively that the side seal part 7 exhibits a hard touch.
  • the absence of the end region of the elastic member in the side seal portion 7 is advantageous in that the elastic member does not receive damage caused by external force or heat applied when the side seal portion 7 is formed.
  • the use of ultrasonic bonding for forming the side seal portion 7 has various advantages as described above.
  • the stain of the adhesive at the time of bonding There are cases where dashi occurs and hinders joining. Therefore, in the present embodiment, the region where the side seal portion 7 is to be formed is an adhesive non-existing region to prevent bleeding of the adhesive during ultrasonic bonding. Moreover, it can prevent effectively that the side seal part 7 becomes hard by that the adhesive agent does not exist in the side seal part 7.
  • the side seal portion 7 is formed only by ultrasonic bonding.
  • this does not mean that only the ultrasonic bonding is employed for the formation of the side seal portion 7, and for example, the combined use of ultrasonic bonding and hot embossing is not hindered.
  • the seal strength of the side seal portion 7 can be improved. From the viewpoint of making this effect even more prominent, as shown in FIG. 5, in the joint row 71 arranged along the longitudinal direction Y of the diaper 1, the length of the joint portion 70 in the longitudinal direction Y is set to L1. When the distance between the adjacent joints 70 in the longitudinal direction Y is L2, it is preferable that the joints 70 are arranged so that the value of L1 / (L1 + L2) has the following relationship.
  • the value of L1 / (L1 + L2) is preferably 0.1 or more, more preferably 0.15 or more, preferably 0.35 or less, and preferably 0.25 or less.
  • the length L1 of the joint portion 70 in the longitudinal direction Y is preferably 0.2 mm or more, more preferably 0.3 mm or more from the viewpoint of arranging a plurality of joint portions 70 on the side seal portion 7 and obtaining sufficient strength. Moreover, 2 mm or less is preferable and 1.5 mm or less is still more preferable. Specifically, 0.2 mm or more and 2 mm or less are preferable, and 0.3 mm or more and 1.5 mm or more are more preferable.
  • the length L3 of the joint portion 70 in the width direction X is preferably 0.5 mm or more, preferably 1 mm or more, and 10 mm or less from the viewpoint of obtaining sufficient strength and the balance that the side seal portion 7 occupies in the diaper 1. 7 mm or less is more preferable. Specifically, it is preferably 0.5 mm or more and 10 mm or less, and more preferably 1 mm or more and 7 mm or less.
  • the value of L1 is constant along the width direction X, but the value of L1 is When the shape is not constant along the width direction X, the value of L1 is defined as the largest value among the values of L1 of the joint portion 70 measured along the width direction X. .
  • the value of L2 is defined as the smallest value among the values of L2 between the joints 70 measured along the width direction X.
  • the value of L3 is defined as the value having the largest value among the values of L3 of the joint portion 70 measured along the longitudinal direction Y.
  • two rows of joining portion rows 71 a and 71 b are formed in the side seal portion 7 along the longitudinal direction of the diaper 1.
  • the value of / (L1 + L2) is preferably satisfied by at least one of the two rows of joint sections 71a and 71b, and more preferably by both joint sections 71a and 71b.
  • the joint portions 70a and 70b are arranged so that non-overlapping portions are formed between the joint portions 70a and 70b between the rows 71a and 71b.
  • the joints 70 a and 70 b are arranged so that the joints 70 a and 70 b do not overlap at all between the joint rows 71 a and 71 b.
  • FIG. 7 shows another embodiment of the present invention.
  • the embodiment shown in the figure is different from the above-described embodiment in the area D where the adhesive 9 for fixing the elastic members 81 and 82 is applied.
  • the adhesive 9 was applied to the inner position in the width direction X of the diaper 1 than the side edge closer to the inner side of the side seal portion 7, but in this embodiment, A side edge portion D1 of the diaper 1 in the width direction X in the region D where the adhesive 9 is applied partially overlaps with the side seal portion 7.
  • the side edge portion D1 of the region D is located between the first joint portion row 71a and the second joint portion row 71b formed in the side seal portion 7.
  • the side seal portion 7 includes a part of the region where the adhesive 9 is present.
  • the adhesive 9 does not exist over the entire area of the side seal portion 7.
  • the inward side edge D ⁇ b> 2 in the width direction X in the region D is located on the inner side in the width direction X than the end portions of the elastic members 81 and 82.
  • an adhesive can be applied between the outer layer sheet 61 and the inner layer sheet 62 in either one or both of the ventral side A and the back side B.
  • the adhesive 9 is not present between the inner layer sheet 62 on the ventral side A and the inner layer sheet 62 on the back side B.
  • sufficient bonding strength is obtained by the second bonding portion row 71b, and the tearability of the side seal portion 7 when the adhesive 9 positioned on the side seal portion 7 is discarded is improved. It is advantageous in that it contributes to And since the area
  • FIG. 8 shows yet another embodiment of the present invention.
  • the outer packaging material is divided into a ventral outer packaging material and a back outer packaging material. That is, in the present embodiment, the pant-type diaper 1A includes an abdominal outer packaging material 63 disposed on the wearer's belly side, a back outer packaging material 64 disposed on the wearer's back side, and an abdominal outer packaging material. 63 and a longitudinally long absorbent main body 5 that is fixed over the backside outer packaging material 64. There is no outer packaging material in the crotch C.
  • both-sides edge part 6a of the back side outer packaging material 64 and the both-side edge parts 6b of the abdominal side outer packaging material 63 are joined by the aspect similar to previous embodiment, and the underpants type diaper 1A which has a pair of side seal part is provided. Is formed.
  • the description regarding the above-described embodiment is appropriately applied.
  • the top sheet 2, the back sheet 3 and the absorbent body 4 are usually used for absorbent articles such as disposable diapers, respectively. If there is, it can be used without any particular limitation.
  • the surface sheet 2 for example, a hydrophilic and liquid-permeable nonwoven fabric can be used.
  • the back sheet 3 for example, a liquid-impermeable or water-repellent resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used.
  • the resin film may have moisture permeability.
  • an aggregate of fibers such as pulp fibers (may be a non-woven fabric) or an absorbent core in which particles of a superabsorbent polymer are held, a core made of water-permeable thin paper or non-woven fabric is used. Those covered with a wrap sheet can be used.
  • the outer layer sheet 61 and the inner layer sheet 62 constituting the outer packaging material 6 can be used without particular limitation as long as they are usually used for absorbent articles such as disposable diapers.
  • a water-repellent nonwoven fabric or the like can be used as the outer layer sheet 61 and the inner layer sheet 62.
  • the waist elastic member 81, the waistline elastic member 82, and the leg elastic member 83 can be used without particular limitation as long as they are usually used in absorbent articles such as disposable diapers.
  • a thread-like stretchable material made of natural rubber, polyurethane, polystyrene-polyisoprene copolymer, polystyrene-polybutadiene copolymer, polyethylene- ⁇ olefin copolymer such as ethyl acrylate-ethylene, or the like can be used.
  • the adhesive 9 can be used without particular limitation as long as it is usually used for absorbent articles such as disposable diapers, and for example, a hot-melt adhesive can be used.
  • the elastic member 8 has an end on the outer side in the width direction of the diaper 1 that terminates inward in the width direction of the diaper 1 than the side seal portion 7.
  • the elastic member 8 may not be terminated at the inner side in the width direction of the diaper 1 than the side seal portion 7, and the end portion may exist at the position of the side seal portion 7.
  • the adhesive agent 9 was given to the whole region of the outer layer sheet 61 and the inner layer sheet 62 in the area
  • the waist elastic member 81 and the waist elastic member 82 may be joined to the outer layer sheet 61 and the inner layer sheet 62 by directly applying to the waist elastic member 82.
  • the adhesive 9 is partially applied to a portion that becomes a joining portion of each elastic member, and the adhesive applied to each elastic member is located inward in the width direction of the diaper 1 rather than the side seal portion 7. Collectively, this is area D.
  • the pants-type wearing articles of the present invention are other articles such as pants-type absorbent articles such as pants-type sanitary napkins and pants-type incontinence pads, and absorbent articles. It can also be applied to sanitary shorts, disposable underwear, etc. that do not have a main body or absorber.
  • the waist elastic member 81 and the waistline elastic member 82 are fixed to the outer layer sheet 61 and the inner layer sheet 62 for one or more of them. You may carry out in the whole region of a member.
  • column formed in the side seal part 7 was two rows, the 1st junction part row
  • the waistline elastic member 82 is disposed so as not to cross the absorber 4, but the waistline elastic member 82 may cross the absorber 4.
  • junction part formed in the side seal part 7 was a rectangle which has a side parallel to the width direction and longitudinal direction of the diaper 1, it replaced with this, a triangle, an inverted triangle, circular Or you may form the junction part of the shape which consists of an ellipse, or those arbitrary combinations.
  • the present invention further discloses the following pants-type wearing article.
  • An abdominal part, a crotch part, and a dorsal part having an outer packaging composed of an inner layer sheet positioned on the side closer to the wearer's body and an outer layer sheet positioned on the side far from the wearer's body.
  • a plurality of elastic members extending in the width direction are arranged on the outer packaging material in the abdominal side portion and the back side portion, and both side edge portions of the abdominal side portion and both side edge portions of the back side portion are overlapped with each other.
  • a pants-type wearing article having a pair of side seal portions formed by joining together,
  • the side seal portion is formed by intermittently ultrasonically joining the side edge portions along the longitudinal direction of the article,
  • the elastic member is fixed to these sheets with an adhesive between the outer layer sheet and the inner layer sheet, Fixing of the elastic member with the adhesive is performed at both end regions of the elastic member, The region where the adhesive is applied is located inward from the outer side edge in the width direction of the side seal portion,
  • the pants-type wearing article in which the elastic member is in a non-bonded state with the outer layer sheet and the inner layer sheet in the region between the both end regions.
  • ⁇ 2> The pants-type wearing article according to ⁇ 1>, wherein the region to which the adhesive has been applied is located inward from a side edge closer to the inner side in the width direction of the side seal portion.
  • ⁇ 3> The elastic member according to ⁇ 1> or ⁇ 2>, in which an end portion on the outer side in the width direction terminates inward in the width direction of the pants-type wearing article than the side seal portion. Pants-type wearing article.
  • ⁇ 4> A plurality of joints formed by intermittently ultrasonically joining the side edges are arranged in a line along the longitudinal direction of the article, When the length of the joint in the longitudinal direction is L1, and the distance between the joints adjacent in the longitudinal direction is L2, the value of L1 / (L1 + L2) is 0.1 or more and 0.35 or less.
  • the pants-type wearing article according to any one of ⁇ 1> to ⁇ 3>, wherein each joint portion is arranged as described above.
  • ⁇ 5> In each side seal portion, a plurality of rows of the joint portions are provided across the width direction of the article, and when viewed along the width direction of the article, the joint portions are arranged between the rows.
  • each joint portion is disposed so that a non-overlapping portion is generated.
  • each joint surface in the both side edge portions is made of a nonwoven fabric composed of only single resin fibers.
  • ⁇ 7> The pants-type wearing article according to ⁇ 6>, wherein the fiber is a fiber made only of polypropylene.
  • ⁇ 8> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 7>, wherein the side seal portion is formed only by ultrasonic bonding.
  • ⁇ 9> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 8>, wherein an absorbent main body including an absorbent is disposed on the inner layer sheet in the outer packaging material.
  • the elastic member is a waist elastic member and a waistline elastic member.
  • ⁇ 11> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 10>, wherein the adhesive is not present in the side seal portion.
  • ⁇ 12> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 11>, wherein the region to which the adhesive is applied includes all or part of an end region of the elastic member.
  • the adhesive is applied to the entire area of the outer layer sheet and the inner layer sheet in the region where the adhesive is applied.
  • ⁇ 14> The pants according to any one of ⁇ 1> to ⁇ 12>, wherein the adhesive is directly applied to the elastic member to join the elastic member, the outer layer sheet, and the inner layer sheet. Mold wearing article.
  • the outer wrapping material is divided into an abdominal wrapping material and a back wrapping material, and includes the abdominal wrapping material and a vertically long absorbent main body that is fixed over the back wrapping material.
  • the underpants-type wearing article according to any one of ⁇ 1> to ⁇ 14>.
  • the value of L1 / (L1 + L2) is preferably 0.1 or more. 0.15 or more, more preferably 0.35 or less, further preferably 0.25 or less, specifically 0.1 or more and 0.35, and particularly 0.15 or more and 0.25 or less.
  • the pants-type wearing article according to any one of the above items ⁇ 1> to ⁇ 15>.
  • L1 is preferably 0.2 mm or more, preferably 0.3 mm or more, more preferably 2 mm or less, and even more preferably 1.5 mm or less, Specifically, the pants-type wearing article according to any one of ⁇ 1> to ⁇ 16>, preferably 0.2 mm to 2 mm, and more preferably 0.3 mm to 1.5 mm.
  • L3 is preferably 0.5 mm or more, preferably 1 mm or more, preferably 10 mm or less, more preferably 7 mm or less, specifically
  • a plurality of joint rows are provided across the width direction, and there is no gap between the joint rows when viewed along the width direction of the wearing article.
  • ⁇ 20> Said ⁇ 1>, ⁇ 3> thru
  • ⁇ 21> In the side seal portion, a plurality of the joint portions formed by intermittently ultrasonically joining the both side edge portions are arranged in a row along the longitudinal direction of the article, A plurality of rows of the joint portions are provided across the width direction of the article, and a side edge portion on the outer side in the width direction of the region where the adhesive is applied is different from one row of the joint portions. ⁇ 1>, ⁇ 3> thru
  • a plurality of the joint portions formed by intermittently ultrasonically joining the both side edge portions are arranged in a row along the longitudinal direction of the article,
  • ⁇ 24> The pants-type wearing article according to any one of ⁇ 1> to ⁇ 22>, wherein the pants-type wearing article is a sanitary short or a disposable underwear that does not include an absorbent main body or an absorbent body.
  • Example 1 A laminated sample sheet for measuring the seal strength was produced.
  • Four spunbond nonwoven fabrics having a basis weight of 17 g / m 2 were stacked and subjected to ultrasonic bonding having the dimensions shown in Table 1 below.
  • the spunbond nonwoven fabric one formed of fibers (fiber diameter of about 15 ⁇ m) made of only single resin polypropylene was used.
  • an ultrasonic oscillator manufactured by BRANSON was used, and ultrasonic bonding was performed under the condition of 20 kHz.
  • the joint formed by joining had a rectangular shape.
  • the Y direction which is the length direction of L1 and L2 shown in FIG. 5 described above, was matched with the CD direction of the nonwoven fabric.
  • the X direction which is the length direction of L3 was made to correspond with MD direction of a nonwoven fabric.
  • the region where a plurality of joints are arranged in the Y direction was 100 mm, and was provided within 10 mm from the end of the nonwoven fabric in the X direction.
  • the ultrasonically bonded laminate was cut to a length of 30 mm in the Y direction to obtain three laminate sample sheets having a size of 50 mm in the X direction and 30 mm in the Y direction. This operation was also carried out on 12 separately produced laminates, and a total of 36 laminated sample sheets were prepared. About these lamination
  • Examples 2 to 4 A laminated sample sheet was produced in the same manner as in Example 1 except that the dimensions of the joint were as shown in Table 1. About the produced lamination sample sheet, it carried out similarly to Example 1, and measured the seal strength. The average value of the obtained seal strength is shown in Table 1.
  • Example 1 A laminated sample sheet was prepared in the same manner as in Example 2 except that the adhesive was applied between the first and second sheets of the four nonwoven fabrics and between the third and fourth sheets.
  • the adhesive is a hot melt type adhesive (styrene-based) that is wider than the area where the joint is formed (in the X direction, the area from the end to 30 mm inward in the X direction, in the Y direction) Continuously) using a coater at a basis weight of 15 g / m 2 , and a joint portion was formed in the applied region.
  • the laminated sample sheets of Examples 1 to 4 have significantly improved sealing strength as compared with the laminated sample sheet of Comparative Example 1, and the side of the pants-type wearing article It can be seen that sufficient strength can be obtained when applied to the seal portion.
  • the joint portion is soft and the hardness is not worrisome.
  • Comparative Example 1 although the joint portion is soft, it has a hard feel compared to Examples 1 to 4. This was confirmed by several panelists.

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

Abstract

L'invention concerne une pluralité d'éléments (81, 82) élastiques s'étendant dans le sens de la largeur (X) agencés sur un élément enveloppant (6) sur une partie ventrale (A) et une partie dorsale (B), avec existence d'une paire de parties (7) d'étanchéité latérales formées par le chevauchement et l'assemblage mutuels des bords bilatéraux (6a) de la partie ventrale (A) et des bords bilatéraux (6b) de la partie dorsale (B). Les parties (7) d'étanchéité latérales sont formées par assemblage par ultrasons intermittents des bords bilatéraux (6a, 6b) le long du sens longitudinal (Y). Les éléments (81, 82) élastiques sont fixés à une feuille externe (61) et à une feuille interne (62) de l'élément enveloppant (6) uniquement à l'aide d'un agent adhésif (9) entre les feuilles. L'agent adhésif (9) fixe les éléments (81, 82) élastiques au niveau des deux zones d'extrémité des éléments (81, 82) élastiques. Une région à laquelle l'agent adhésif (9) est appliqué est située de manière plus interne que les bords latéraux des parties (7) d'étanchéité latérales vers l'extérieur dans le sens de la largeur.
PCT/JP2012/082760 2011-12-20 2012-12-18 Article porté de type sous-vêtement Ceased WO2013094591A1 (fr)

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JP2011-278025 2011-12-20
JP2011278025 2011-12-20
JP2012-273908 2012-12-14
JP2012273908A JP6103752B2 (ja) 2011-12-20 2012-12-14 パンツ型着用物品

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EP3358071A4 (fr) * 2015-09-29 2019-05-08 Nitto Denko Corporation Procédé de production d'article en couches
WO2019031124A1 (fr) * 2017-08-08 2019-02-14 ユニ・チャーム株式会社 Article absorbant à remonter
JP2019030551A (ja) * 2017-08-08 2019-02-28 ユニ・チャーム株式会社 パンツ型吸収性物品
JP7408268B2 (ja) 2017-08-08 2024-01-05 ユニ・チャーム株式会社 パンツ型吸収性物品
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WO2023022000A1 (fr) * 2021-08-19 2023-02-23 花王株式会社 Article absorbant de type sous-vêtement
JP2023029256A (ja) * 2021-08-19 2023-03-03 花王株式会社 パンツ型吸収性物品
JP7350946B2 (ja) 2021-08-19 2023-09-26 花王株式会社 パンツ型吸収性物品

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