EA018634B1 - And method of manufacturing a disposable diaper - Google Patents

And method of manufacturing a disposable diaper Download PDF

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Publication number
EA018634B1
EA018634B1 EA201070286A EA201070286A EA018634B1 EA 018634 B1 EA018634 B1 EA 018634B1 EA 201070286 A EA201070286 A EA 201070286A EA 201070286 A EA201070286 A EA 201070286A EA 018634 B1 EA018634 B1 EA 018634B1
Authority
EA
Eurasian Patent Office
Prior art keywords
sheet
front
elastic elements
sheet member
elements
Prior art date
Application number
EA201070286A
Other languages
Russian (ru)
Other versions
EA201070286A1 (en
Inventor
Сюнсукэ Такино
Йуки Маеда
Хиройуки Тандзи
Original Assignee
Юни-Чарм Корпорейшн
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to JP2007230709A priority Critical patent/JP5268046B2/en
Priority to JP2007230639A priority patent/JP5270126B2/en
Priority to JP2007230710A priority patent/JP5225637B2/en
Priority to JP2007230640A priority patent/JP5383018B2/en
Priority to JP2007232015A priority patent/JP5225640B2/en
Application filed by Юни-Чарм Корпорейшн filed Critical Юни-Чарм Корпорейшн
Priority to PCT/JP2008/065904 priority patent/WO2009031592A1/en
Publication of EA201070286A1 publication Critical patent/EA201070286A1/en
Publication of EA018634B1 publication Critical patent/EA018634B1/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F13/15585Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A61F13/15593Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F13/15699Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F13/15707Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15723Partitioning batts; Cutting
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F13/15804Plant, e.g. involving several steps
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs

Abstract

The aim of the invention is a method of manufacturing a disposable diaper in which the position of an absorption core does not become misaligned from the center of a pair of leg elastic members. The method includes a sheet member manufacturing process (P1), a joining process (P2), and a cutting process (P3). In the sheet member manufacturing process (P1), elastic members are joined, while being stretched, to sheets continuously supplied in the machine direction (MD), and this forms belly side and back side sheet members (20, 30). In the joining process (P2), absorptive panels (4) are joined to the belly side and back side sheet members (20, 30) at constant intervals. Each absorptive panel (4) has a pair of crotch elastic members (42) mounted, while being stretched, on the absorptive panel (4) so as to extend along opposite long sides of a rectangular shape of the absorptive panel (4), and also has the absorption core (5) joined to the absorptive panel (4) so as to be symmetrical about an imaginary center line bisecting the distance between the pair of crotch elastic members. In the cutting process (P3), the belly side and back side sheets to which the absorptive panels are joined are cut.

Description

The present invention relates to a method of manufacturing a disposable diaper.

A disposable diaper along areas of contact with the waist and legs of the wearer, as a rule, is equipped with elastic elements surrounding the waist and elastic elements surrounding the legs. For example, Patent Document 1 discloses a method for manufacturing a disposable diaper, as shown in FIG. 7, comprising a step 8-1, in which the first fabric 115 and the second fabric 116, to which the elastic elements 124 surrounding the waist are pre-attached, and the elastic elements 125 surrounding the legs, are fed in the machine direction, step 8-2, in which the first and second fabrics 115, 116 attach elastic elements 124 surrounding the waist, after which the first and second fabrics 115, 116 are attached to each other, and step 8-3, in which the absorbent pad 103 containing the absorbent core 128 is attached to the first fabric 115, placing it between two elastic elements 12 5, surrounding the legs.

Patent documents

Patent document 1: Japanese Patent Application Laid-Open No. 2002-358465 (paragraphs 0028-0035, FIG. 5).

DISCLOSURE OF INVENTION

In a conventional production line disclosed in Patent Document 1, a long sheet, such as the first fabric 115, is fed in a machine direction, and elastic elements, such as elastic elements 124 surrounding the waist, are attached in a stretched state to such a long sheet. As a consequence, the long sheet is stretched in a direction opposite to the machine direction, and in case of a temporary stopping of the production line for any reason, at the time of such a temporary stopping of the production line, the long sheet inevitably moves from the place on the production line in the opposite direction of the machine direction. If the manufacture of the diaper is resumed without taking this displacement into account, the position of the absorbent pad 103 will be offset relative to the middle between each pair of elastic elements surrounding the legs in each of the diapers manufactured thereafter.

Thus, the production line will produce diapers that do not meet technical requirements, in each of which the absorbent core 128 is placed asymmetrically relative to the imaginary central axis, passing in the middle of the distance between the two elastic elements 125 surrounding the legs, and as a result, a pair of elastic elements 125 and / or the absorbent core 128 cannot be properly positioned in the user's crotch area. To eliminate this drawback, according to a known method, it is necessary to restore the orientation of the long sheet relative to the position in which the absorbent pad 103 should be attached to the long sheet by manual operation.

In view of the above disadvantage, the main objective of the present invention is to provide a method for manufacturing a diaper improved so as to eliminate the displacement of the absorbent core relative to the middle between the two elastic elements surrounding the legs, even in the case of a temporary stop of the production line.

The solution of this problem

The method of manufacture of the disposable disposable diaper comprises the steps of: in the first machine direction parallel to each other in the stretched state, elastic elements for the front sheet element and elastic elements for the rear sheet element are continuously fed; these elastic elements are attached to the sheet blanks of the specified front and rear sheet elements accordingly, continuously fed in the first machine direction, thus forming said front sheet ele The ent, having a constant width in the direction perpendicular to the first machine direction, and the specified rear sheet member, also having a constant width, so that the front and rear sheet members can continuously move parallel to each other and at a distance from each other, are fed at equal intervals to the absorbent pad fitted along the opposite long sides with two elastic elements for the perineal region, attached to it in the stretched state, and an absorbent core attached to the non symmetrically with respect to the imaginary central axis dividing the distance between two elastic elements for the crotch area in half to the front and rear sheet elements moving in the machine direction, place and attach an absorbent pad on the front and rear sheet elements, so that a pair of elastic elements for the perineal area runs perpendicularly to the elastic members for the front sheet member and to the elastic members for the rear sheet member, and the front and rear foxes are cut marketing elements having an absorbent pad attached thereto, substantially in the middle between each pair of adjacent absorbent pads for diapers individual.

According to one preferred embodiment of the invention, the method comprises the steps of: in a second machine direction, a moisture-permeable sheet is continuously supplied;

- 1 018634 sheet and a pair of elastic elements for the crotch area, serves an absorbent core at equal intervals symmetrically relative to the imaginary central axis, passing in the middle of the distance between the two elastic elements for the crotch area, attach elastic elements for the perineal region in a stretched state to at least one of moisture-permeable sheets and moisture-proof sheets, attach the absorbent core between the moisture-permeable sheet and the moisture-proof sheet and cut into The lid-permeable sheet and the moisture-proof sheet are substantially midway between each pair of adjacent absorbent cores in a direction perpendicular to the second machine direction, to form separate absorbent pads.

The proposed method of manufacturing a disposable diaper contains other preferred embodiments described below.

The step of forming sheet elements comprises the step of attaching the elastic elements of the front sheet element and the elastic elements of the rear sheet element in a stretched state to the front sheet element and the rear sheet element, respectively, so that the front sheet element can be reduced more significantly than the rear sheet element when the front elastic elements and rear leaf elements are not stretched. In another embodiment, the step of forming sheet elements comprises the step of selecting a tensile stress in which the elastic members of the front sheet member are attached to the front sheet member exceeding the tensile stress, in which the elastic members of the rear sheet member are attached to the rear sheet member.

The method may also comprise the step of manufacturing the elastic elements of the back sheet element inelastic, at least in the area of overlapping of these elastic elements with an absorbent core.

In addition, the attachment step may comprise the step of attaching the absorbent pad to the front sheet member and the rear sheet member, so that the longitudinal dimension, on which the absorbent core overlaps the front sheet member, is larger than the longitudinal dimension, on which the absorbent core overlaps the rear sheet member.

Technical result

According to the proposed method of manufacturing a diaper, the absorbent pad is pre-equipped with an absorbent core attached to it so that a pair of elastic elements for the crotch region can be placed symmetrically with respect to this absorbent core. This measure reliably prevents the absorbent core from moving relative to the middle between the two elastic elements surrounding the legs. In addition, the proposed method allows to obtain a diaper that does not have any offset absorbent pads relative to the front and rear sheet elements, because the design of the front and rear sheet elements is constant when viewed in the first machine direction.

In addition, the use of two separate sheet blanks for forming the front sheet element and the rear sheet element allows you to exclude from the production process of diapers the stage of cutting a solid sheet billet into two parts and the stage of moving these parts apart. Thus, a more accurate position of the front and rear sheet elements during the production of diapers is achieved. In addition, the constant width of the front and rear sheet elements allows for a constant tensile stress along the entire length of each sheet element.

Brief Description of the Drawings

FIG. 1 shows a plan view of a flat unfolded diaper;

in fig. 2 shows a section taken along the line-ΙΙ shown in FIG. one;

in fig. 3 shows a perspective view of a pant diaper;

in fig. 4 is a schematic diagram illustrating a method of making a diaper;

in fig. 5 shows the front view of the diaper from the side of the abdominal belt;

in fig. 6 shows the rear view of the diaper from the side of the dorsal girdle;

in fig. 7 shows a schematic diagram illustrating a known method of making a diaper.

Designations in the drawings

- A disposable diaper,

- a belt of the front waist,

- belt of the back waist area,

- absorbent pad

- absorbent core

- hole for the waist,

- leg openings,

9a - sheet blank,

9b - sheet blank,

- 2,018,634

- sheet element for the front waist,

- opposite side edges for the front waist,

- opposite side edges for the rear waist,

- leaf element for the back waist,

- opposite side edges for the crotch area,

- elastic elements for the perineal region,

- elastic elements for the front waist,

- elastic elements for the back waist,

C - imaginary central axis,

M - longitudinal central axis,

ΜΌ1 - the first machine direction,

P1 - the stage of formation of the sheet element,

P2 - the stage of attachment

P3 - cutting stage.

Detailed description of preferred embodiments of the invention.

The proposed diaper 1 is described below with reference to FIG. 1-3. FIG. 1 shows a plan view of a flat unfolded diaper from the side of the diaper facing the user's skin, FIG. 2 shows a section taken along the line-ΙΙ shown in FIG. 1, and in FIG. 3 shows a perspective view with a local incision of a diaper 1 formed into a pant.

The diaper 1 comprises a rectangular waistband 2 of the front waist region, extending in the transverse direction indicated by an arrow X, a rectangular waistband 3 of the rear waist region located at a distance and extending parallel to the waistband 2 in the transverse direction, and a rectangular absorbent pad 4 extending in the longitudinal direction indicated arrow Υ, placed flat and fastened together with belt 2, as well as with belt 3, connecting these two belts 2, 3 with each other. Absorbent pad 4 has a smaller transverse size than the lateral dimensions of the belt 2 and belt 3, and contains an absorbent core 5. The diaper 1 has an essentially ’-like structure that is substantially symmetrical about the longitudinal central axis M, passing in the middle of the transverse the size of the diaper 1. Absorbent pad 4 is attached to the belts 2, 3 approximately in their middle areas, so that the absorbent pad 4 is also symmetrical about the longitudinal center axis M.

Belt 2 and belt 3 contain the top sheet 11 and the back sheet 12, having the same shape and size, between which elastic elements 61 of belt 2 or elastic elements 62 of belt 3 are placed, which are attached to them at intervals in the stretched state in the transverse direction X by hot melt (not shown). Belt 2 and belt 3 run parallel to each other and perpendicular to the longitudinal central axis M. Elastic elements 61 and elastic elements 62 contain rubber threads placed at equal intervals from each other in the longitudinal direction Υ over the entire area of the respective belts 2, 3. It is clear to specialists that the top sheet 11 of the user-fitted diaper 1 faces the wearer's skin, and the back sheet is facing the wearer's skin.

The rectangular absorbent pad 4 comprises a rectangular water-absorbing sheet 43 and a rectangular moisture-proof sheet 44, which are wider than at least the transverse part of the rectangular absorbent core 5, the absorbent core 5 is placed between the sheets 43, 44, elastic members 42 extending in the longitudinal direction along opposite side edges edges 41, 41 of the perineal region, formed by the opposite side edges of the rectangular absorbent pad 4, are attached at intervals to sheets 43, 44. Elastic elements Nty 42 on both lateral edges of the crotch area are attached to the sheets 43, 44 by hot melt (not shown). In this embodiment of the invention, rubber threads are used as elastic elements 42 on both lateral edges of the crotch area. Obviously, when the diaper is worn, the moisture-permeable sheet 43 faces the user's skin, and the moisture-proof sheet 44 faces away from the user's skin.

The absorbent core 5 is placed inside the absorbent pad 4 symmetrically with respect to the imaginary central axis C extending midway between the elastic members 42 extending along the opposite lateral edges of the crotch region. The imaginary central axis C coincides with the longitudinal central axis when the absorbent pad 4 is attached to the belt 2 and the belt 3. In this case, it is obvious that when the diaper 1 is worn, the moisture-permeable sheet 43 faces the user's skin, and the moisture-proof sheet 44 is turned away from the user's skin.

Preferably, the absorbent core 5 is attached to the belt 2 and the belt 3, so that the longitudinal distance along which the absorbent core 5 overlaps the belt 2 is longer than the longitudinal distance along which the absorbent core 5 overlaps the belt 3, as can be seen from FIG. 1. Thus, the effective area of the absorbent core 5 to cover the front crotch region of the user, passing laterally towards the belt 2, is sufficient to ensure effective absorption.

- 3,018,634

Absorbent pad 4 is flat and attached to the belt 2 and belt 3, so as to overlap the corresponding areas of these belts 2, 3, in which there are elastic elements 61, 62. As a consequence, the elastic elements 61 of belt 2, elastic elements 62 of belt 3 and elastic elements 42 for the crotch area overlap each other in areas in which the absorbent pad 4 overlaps the belt 2 and the belt 3, as can be seen from FIG. 2

The elastic elements 61 of the belt 2 and the elastic elements 62 of the belt 3 are attached to the corresponding belts 2, 3 by hot melt (not shown), and the elastic elements 42 for the crotch area are attached to the absorbent pad 4. This means that the elastic elements 42 for the crotch area are connected to elastic elements 61 belts of the front waist region and elastic elements 62 belts of the back waist region by means of the top sheet 11 and the moisture-proof sheet 44. As a result, the tensile force applied to any of these groups elastic members, causes a reaction of the elastic members of other groups to such stretching force and tensile.

The material for the moisture-permeable sheet 43 and the moisture-proof sheet 44 constituting the absorbent pad 4 can be appropriately selected, taking into account the required properties, such as moisture permeability, air permeability and softness, from various types of fibrous nonwoven material and / or film used for disposable a diaper and a thermoplastic synthetic resin. For the absorbent core 5, a known material that absorbs bodily fluid containing fluff pulp can be used. Absorbent core 5 is covered with papyrus paper (not shown) and attached to a moisture-permeable sheet 43 and a moisture-proof sheet 44.

The topsheet 11 and the backsheet 12 constituting the belt 2 and belt 3 can also be appropriately selected from various types of fibrous nonwoven material and / or film made on the basis of a thermoplastic synthetic resin. The material for the top sheet 11 may be the same or different from the material for the back sheet 12. In addition, one sheet may be folded in half, so that one half forms the top sheet 11, and the other half forms the back sheet 12.

The elastic elements 42 for the perineal region and the elastic elements 61, 62 surrounding the waist can be made in the form of rubber threads, tape-like vulcanized rubber, thermoplastic elastomer, elasticized nonwoven material or resin film. The attachment of the respective sheets, the respective elastic members and the absorbent members for the absorption of the bodily fluid can be carried out using a method well known in the field of disposable diapers, for example, hot melt or heat sealing.

By attaching the opposite side edges 21, 21 of the belt 2, extending in the longitudinal direction, to the opposite side edges 22, 22 of the belt 3, extending in the longitudinal direction, so that the belt 2 and the belt 3 can be bent to form a ring, the pant-type diaper is molded as shown in FIG. 3. According to alternative methods (not shown), the opposite side edges of the belt 2 can be connected to the opposite side edges 22, 22 of the belt 3 by not attaching these side edges, as shown in FIG. 3, and by means of a so-called mechanical fastener comprising a hook element and a looped element, or by means of adhesive tape based on contact adhesive.

A pant-type diaper 1A as shown in FIG. 3, has a hole for waist 7, formed by belt 2 and belt 3, ring-connected together, and a pair of leg openings 8 formed by belt 2, belt 3 and absorbent pad 4 attached to these belts 2, 3. More specifically, as shown in fig. 1, a pair of leg openings 8 are formed by the inner edge 13 of the belt 2 and the inner edge 14 of the belt 3, passing in the transverse direction and placed opposite each other through the absorbent pad 4, cooperating with opposite side edges 41 of the absorbent pad 4, i.e. perineal region. The outer edge of the opening for the waist formed by the outer edge 15 of the belt 2 and the outer edge of the belt 3, passing in the transverse direction parallel to the corresponding inner edges 13, 14.

As described above, the elastic elements 42 are connected to the elastic elements 61 of the waist belt of the front region and the elastic elements 62 of the waist belt of the waist. In addition, the elastic elements 61 of the belt 2 and the elastic elements 62 of the belt 3 are also connected to each other, since belt 2 and belt 3 are annularly connected to each other. Thus, in the diaper 1A, the elastic elements 61 of the waist front region, passing near the inner edge 13 of the waist belt, the elastic elements 62 of the waist waist belt, passing near the inner edge of the waist waist, and a pair of elastic elements 42 for the perineal region are annular are connected to each other along the leg openings 8 and function as elastic members 81 surrounding the legs.

Absorbent core 5 is placed in the absorbent pad 4 symmetrically with respect to the imaginary central axis C, passing in the middle between the elastic elements 42, which are part of the elastic elements 81, surrounding the legs. As a consequence, the absorbent core 5 can be placed midway between the two elastic elements 81 surrounding the legs, regardless

- 4 018634 This is how the absorbent pad 4 is attached to the belt 2 and the belt 3. In other words, by equipping the absorbent pad 4 with two elastic elements 42 for the crotch area, which are part of the elastic elements 81 surrounding the legs, the absorbent core 5 is permanently oriented midway between the elastic elements 81 surrounding the legs.

The following describes the proposed method of manufacturing a diaper 1 with reference to FIG. 4, which shows a schematic diagram illustrating the steps performed to manufacture a target product.

In accordance with an embodiment of the invention shown in FIG. 4, in the step P1 of forming sheet members, the sheet stock 9a for forming the sheet member 20 of the front waist region and the sheet stock 9b for forming the sheet member 30 of the back waist region are continuously fed in the first machine direction 1. These sheet blanks 9a, 9b, respectively, are coated with hot melt using coating devices (not shown), and then elastic elements 61, 62 of the front and rear belts, continuously fed in the first machine direction at a given tension, are attached to each of the sheet blanks 9a, 9b approximately half of their width, if you look in the direction (indicated by the arrow of the solar cell). perpendicular to the first machine direction. The elastic elements 61, 62 of the front and rear belts may respectively contain rubber threads, and the rubber threads may be placed at equal or unequal intervals from each other.

Then, the sheet blanks 9a, 9b are folded in half, so that their surfaces with the elastic elements 61, 62 of the front and rear belts applied to them form the inner surfaces. Thus, a sheet element 20 having a constant transverse size and equipped with elastic elements 61, and a sheet element 30 having a constant transverse size and equipped with elastic elements 62 are obtained. Thus, the sheet element 20 and the sheet element 30, respectively, have a constant structure when viewed in the first machine direction. It should be noted that the transverse dimensions of the sheet elements 20, 30 may be different. The lateral dimensions of these sheet members 20, 30 can be selected from a range of 50 to 250 mm. The sheet elements 20, 30 thus formed are placed at a distance from each other and parallel to each other in the transverse direction and are fed in this position to the attachment step P2.

At the attachment stage, the absorbent pads 4, each of which contains an absorbent core 5, are supplied at equal intervals towards the sheet elements 20, 30 running in the first machine direction, and attached to these sheet elements 20, 30. To supply the absorbent pads 4 to equal intervals can be shared between the roller 91 with a variable angle and the pressing roller 92, as described in Japanese application No. 2004-33549, published in the bulletin of published patent applications of Japan. More specifically, the absorbent pad is rotated 90 ° using a roller 91 and is overlapped on the front sheet member 20 and the back sheet member 30 by elastic members 42, 42 of the perineal region of the absorbent pad 4, extending perpendicular to the elastic members 61, 62 of the belts of the front and rear waist, respectively . Preferably, the absorbent pad 4 is attached to the front and rear sheet members 20, 30, so that the longitudinal size of the absorbent pad 4 overlapping the sheet member 20 is larger than the longitudinal size of the absorbent pad 4 overlapping the sheet member 30. Sheet members 20, 30 having an absorbent pad 4 attached to them, served in this way on the stage P3 cutting. However, before a detailed description of the cutting stage P3, the stage P4 of forming the absorbent structure will be described.

The step P4 of forming absorbent pads 4 is not a continuation of the step P1 of forming sheet elements and the step P2 of attachment, but is essentially a separate step. The step P4 of forming the absorbent pads 4 can be performed between the stages P1 and P2, or the absorbent pads 4 formed in the step P4 can be supplied at equal intervals to the sheet elements 20, 30.

In step P4 of forming the absorbent pad, a moisture-permeable sheet 45 and a moisture-proof sheet 46, continuously fed in a second machine direction indicated by arrow ΜΌ2, are coated with hot-melt adhesive on one of their opposite surfaces with a coating device (not shown), then a pair of elastic elements 42, 42 for the perineal region, running parallel to each other, is continuously fed in the stretched state in the second machine direction to the surface of the sheet 45 or 46, coated with hot melt, and absorbing with The cores 5 are served with equal intervals for placement between each pair of elastic elements 42 for the crotch area.

Then, the absorbent core 5 and each pair of elastic elements 42 for the perineal region are fixed with glue between the moisture-permeable sheet 45 and the moisture-proof sheet 46 under pressure produced by a roller or similar means, and then cut, essentially, along a line running midway between each pair of absorbent cores 5, in the direction perpendicular to the second machine direction, to obtain separate rectangular absorbed

- 5 018634 inlays 4. Each pair of elastic elements 42 for the crotch area runs along the opposite long sides of the rectangular absorbent pad 4.

The absorbent core 5 is attached between the moisture-permeable sheet 45 and the moisture-proof sheet 46 symmetrically with respect to the imaginary central axis C, passing in the middle of the distance between the two elastic elements 42 for the crotch area. Thus, the possibility of displacement of the absorbent core 5 relative to the middle between the two elastic elements 81, surrounding the legs, regardless of how the absorbent pad 4 is attached to the sheet elements 20, 30, and regardless of whether or not there is a temporary production line. It should be noted that the essential requirement for the elastic members 42 is the arrangement along the opposite long sides of the rectangular absorbent pad 4, and it is not essential for these elastic members 42 to be attached to both the moisture-permeable sheet 45 and the moisture-proof sheet 46. More specifically, the elastic members 42 can be attached to moisture-permeable sheet 45 or to a waterproof sheet 46.

At the cutting stage P3, following the attachment stage P2, a set of known cutting rollers 93 can be used, having upper and lower cutting blades and cutting the sheet elements 20, 30 at equal intervals. More specifically, the sheet members 20, 30 are cut substantially midway between two adjacent absorbent pads 4 in the transverse direction to form separate diapers 1. In the diaper 1, the sheet members 20, 30 form a belt 2 and a belt 3. Opposite side edges 21, 21 The belts 2 are attached to the opposite side edges 22, 22 of the belts 3 in order to obtain a pant-type diaper 1. Opposite side edges 21, 21 and opposite side edges 22, 22, as described above, can also be equipped with tape fasteners, by means of which the front and rear waist areas can be connected to each other to obtain a pant diaper 1.

In the case of stopping the production line at these stages as a result of stretching the elastic elements 61, 62 of the belts 2, 3, not attached to the front and rear sheet elements 20, 30, the sheet elements 20, 30 stretch in the direction opposite to the first machine direction. As a result, the area B, in which the absorbent pad 4 must be attached to the sheet element, and the imaginary cut line O. along which the sheet elements 20, 30 are to be cut, are displaced in the direction opposite to the first machine direction by the same distance.

After the resumption of the production line, diapers 1 are made on the basis of the new attachment area B and the new imaginary cutting line O- differing from the attaching area B and the imaginary cutting line O to a temporary stop of the production line, resulting in a diaper 1, the absorbent pad 4 of which is not displaced in relation to the sheet elements 20, 30, since the structure of the sheet elements 20, 30 is constant when viewed in the first machine direction.

In the event of any displacement of the absorbent pad 4 with respect to the front and rear sheet members during the application of the proposed method, this displacement is limited to the area in which the absorbent pad 4 is attached to the sheet member at step P2 and is not cut off at step P3. Thus, the possibility of obtaining diapers 1 is excluded, in each of which the absorbent pad 4 and the absorbent core 5 are offset from the usual positions, which is the case when using known methods of manufacturing diapers.

In addition, even in the event of any displacement of the absorbent pad 4 with respect to the front and rear sheet elements, it should not be feared that there could be any displacement of the absorbent core 5 with respect to the elastic members 81 surrounding the legs, as was the case using known methods for making diapers. When the production line is temporarily stopped, the sheet elements 20, 30 can be securely fixed between the roller 91 and the roller 92 at the attachment stage P2, as well as between the two cutting rollers 93 at the cutting stage to prevent these sheet elements 20, 30 from moving in the opposite direction to the first machine direction, and thus to prevent the absorbent pad 4 from moving relative to the sheet members 20, 30. Thus, the undesirable release of the diaper 1 having the absorbent pad offset 4 can be prevented aschen

Although the step P1 of forming the sheet element is described above in accordance with a typical embodiment of the invention, according to which the sheet elements 20, 30 are formed from two sheet blanks 9a, 9b, the stage P1 can be carried out as follows: after attaching the rubber threads in the stretched state to the solid sheet blank supplied in the first machine direction, the sheet blank is folded in half, covering these rubber threads, then the folded sheet blank is continuously cut in the direction parallel to SG first machine direction to obtain a sheet-shaped members 20, 30 which are arranged at a distance from each other in the transverse direction by moving them in parallel. Step P1 can also be carried out as follows: a pair of sheet blanks, prepared respectively for forming sheet elements 20, 30, placed at a distance from each other in the transverse direction, are fed parallel to each other in the first machine direction, rubber threads are attached to the stretched condition to the corresponding sheet blanks, and then a pair of separately fed sheet blanks are placed respectively on sheet blanks, equipped with rubber threads attached to them, covering this and rubber thread, and thus form sheet metal members 20, 30.

Regardless of the choice of implementation of the stage 1 of forming sheet elements 20, 30, it is necessary to secure the elastic elements 61, 62 of the front and rear sheet elements in the stretched state, so that the sheet element 20 cuts more significantly than the sheet element 30 when the elastic elements 61 of the belt 2 and the elastic elements 62 of the belt 3 are released from stretching. The configuration of the diaper 1A, obtained by attaching the elastic elements 61, 62 of the belts of the waist area, is schematically shown in FIG. 5 and 6. In FIG. 5 shows a view of the diaper 1A from the side of the belt 2, and FIG. 6 shows a view of the diaper 1A from the side of the belt 3.

In diaper 1A, belt 2 is reduced more significantly than belt 3, since the sheet member 20 is reduced more substantially than the sheet member 30. As a result, the visible width A1 of the absorbent pad 4 of the diaper 1A near the border between the absorbent pad 4 and the belt 2 is less than the visible width A2 of the absorbent pad 4 near the border between the absorbent pad 4 and the belt 3.

This configuration of the absorbent pad 4, in which its apparent width gradually decreases from the belt 3 to the belt 2, advantageously provides the diaper 1 with a wide area of the user's buttocks and prevents the user from feeling discomfort while wearing the diaper because the sheets have sufficient width in the crotch user area. In addition, a pair of leg openings formed by the absorbent pad 4 and the annularly attached belts 2, 3 extend somewhat forward to improve the fit of the diaper 1 around the user's feet.

One of the ways for the sheet element 20 to contract more significantly than the sheet element 30 is to install such a tensile stress of the elastic elements 61 of the belt, in which these elastic elements 61 are attached to the sheet element 20 that exceeds the tensile stress of the elastic elements 62 of the belt, in which elastic members 62 are attached to the sheet member 30. More specifically, the amount of stretching at which the elastic members 61 are attached to the sheet member 20 is set more stretching it bigger value at which elastic members 62 are attached to the sheet member 30, when it is considered that the elastic members 61, 62 have the same quality of material as well as configuration. Alternatively, the elastic members 61 of the sheet member 20 can be formed by a much larger number of rubber threads than the number of rubber threads constituting the elastic members 62 of the sheet member 30. It is also possible to change the material quality and / or the configuration of the rubber threads of the elastic members 61 of the sheet member 20 and elastic elements 62 sheet element 30 to achieve the desired effect.

Alternatively, an elastic film is used as the elastic elements 61, 62 of the front and rear sheet elements, and the width and / or thickness of the elastic elements 61 of the sheet element 20 may be different from the width and / or thickness of the elastic elements 62 of the sheet element 30 to achieve the desired effect .

As another method of causing a more substantial reduction of the sheet element 20, as compared with the sheet element 30, a step of manufacturing elastic elements 62 attached to the sheet element 30 may be proposed to be non-elastic. The elastic elements 62 of the sheet element 30 can be made inelastic by known methods, such as cutting, heat treatment or chemical processing of elastic elements 62.

Claims (6)

  1. CLAIM
    1. A method of manufacturing a disposable diaper, comprising the steps of: in the feed direction parallel to each other in a stretched state, a web is continuously supplied to form a front sheet member and a web to form a back sheet member and elastic members for said front and back sheet webs, attach these elastic elements to each of the canvases of the specified front and rear sheet elements approximately half the width of each of these each of these canvases is folded, covering said elastic members and forming said front sheet member having a constant width in the direction perpendicular to the feed direction, and said rear sheet member also having a constant width so that said front and rear sheet members are continuously move parallel to each other at a distance from each other;
    an absorbent pad is supplied through equal distances, having on opposite long sides a pair of elastic elements for the perineal region attached to it in the stretched state, with an absorbent core attached to it symmetrically relative to the imaginary
    - 7 018634 tempered central axis dividing the distance between the specified pair of elastic elements for the crotch area in half to the front and rear sheet elements moving in the feed direction, place and attach said absorbent pad to said front and rear sheet elements, so that the specified pair of elastic elements for the crotch region, it runs perpendicularly to said elastic elements of the front sheet member and to said elastic elements of the rear sheet member, and connect with them;
    cut said front and back sheet members having said absorbent pad attached thereto substantially midway between said two adjacent absorbent pad to form separate diapers.
  2. 2. The method according to claim 1, comprising the step of producing an absorbent pad, for which a moisture-permeable sheet, a moisture-proof sheet and a pair of elastic elements for the perineum region are continuously supplied in the feed direction, the absorbent core is supplied at equal distances symmetrically relative to the imaginary central axis passing midway between the two elastic elements for the crotch area;
    attaching elastic members to the perineal region in the stretched state to at least one of the moisture-permeable sheets and moisture-proof sheets; attaching an absorbent core between the moisture-permeable sheet and the moisture-proof sheet;
    cutting a moisture-permeable sheet and a moisture-proof sheet, substantially midway between each pair of adjacent absorbent cores in a direction perpendicular to the feed direction, to obtain separate absorbent pads.
  3. 3. The method according to claim 1 or 2, wherein the elastic elements of the front sheet member and the elastic members of the rear sheet member are attached in a stretched state to the front sheet member and the rear sheet member, respectively, so that the front sheet member can be reduced more significantly than the back sheet member element, when the elastic elements of the front and rear sheet elements, respectively, not stretched.
  4. 4. The method according to claim 1, in which the tensile stress, in which the elastic elements of the front sheet member are attached to the front sheet member, is chosen to be greater than the tensile stress, in which the elastic members of the rear sheet member are attached to the rear sheet member.
  5. 5. The method according to claims 1-4, in which the elastic elements of the rear sheet element is performed with a non-elastic section, at least in the area of overlapping of these elastic elements with an absorbent core.
  6. 6. The method according to claims 1-5, in which the front sheet element and the rear sheet element is chosen so that the longitudinal dimension, on which the absorbent core overlaps the front leaf element, is larger than the longitudinal dimension, on which the absorbent core overlaps the rear leaf element.
EA201070286A 2007-09-05 2008-09-03 And method of manufacturing a disposable diaper EA018634B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2007230709A JP5268046B2 (en) 2007-09-05 2007-09-05 Wearing article
JP2007230639A JP5270126B2 (en) 2007-09-05 2007-09-05 Disposable diaper manufacturing method
JP2007230710A JP5225637B2 (en) 2007-09-05 2007-09-05 Disposable pants-type body fluid absorbent wearing article
JP2007230640A JP5383018B2 (en) 2007-09-05 2007-09-05 Disposable diapers
JP2007232015A JP5225640B2 (en) 2007-09-06 2007-09-06 Absorbent articles
PCT/JP2008/065904 WO2009031592A1 (en) 2007-09-05 2008-09-03 Disposable absorptive wearing article and method of manufacturing the same

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EA201070286A1 EA201070286A1 (en) 2011-02-28
EA018634B1 true EA018634B1 (en) 2013-09-30

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EA201070286A EA018634B1 (en) 2007-09-05 2008-09-03 And method of manufacturing a disposable diaper

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EA (1) EA018634B1 (en)
EG (2) EG27155A (en)
MX (1) MX2010002607A (en)
WO (1) WO2009031592A1 (en)
ZA (1) ZA201007316B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5777271B2 (en) * 2009-03-25 2015-09-09 ユニ・チャーム株式会社 wearing article
US8753466B2 (en) * 2009-10-23 2014-06-17 Kimberly-Clark Worldwide, Inc. Method of making disposable absorbent garments employing elastomeric film laminate body panels
US8622983B2 (en) * 2009-12-31 2014-01-07 Kimberly-Clark Worldwide, Inc. Method of incorporating leg elastics in a pant-like disposable absorbent garment, and garment made thereby
JP5984368B2 (en) * 2011-01-31 2016-09-06 ユニ・チャーム株式会社 Disposable wearing items
JP2017537726A (en) * 2014-12-25 2017-12-21 ザ プロクター アンド ギャンブル カンパニー Wearable article having an elastic belt
WO2018020676A1 (en) * 2016-07-29 2018-02-01 ユニ・チャーム株式会社 Absorbent article

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JPH03176053A (en) * 1989-12-04 1991-07-31 Zuikou:Kk Manufacture of briefs type disposable diaper
JP2000189462A (en) * 1991-03-01 2000-07-11 Kao Corp Absorptive article
JP2002306534A (en) * 2001-04-12 2002-10-22 Uni Charm Corp Disposable briefs type diaper
JP2004141640A (en) * 2002-08-30 2004-05-20 Uni Charm Corp Absorptive article with decoration element
JP2004329873A (en) * 2002-12-13 2004-11-25 Zuiko Corp Production method for article
WO2006017718A1 (en) * 2004-08-05 2006-02-16 The Procter & Gamble Company Disposable pull-on garment

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Publication number Priority date Publication date Assignee Title
JPH03176053A (en) * 1989-12-04 1991-07-31 Zuikou:Kk Manufacture of briefs type disposable diaper
JP2000189462A (en) * 1991-03-01 2000-07-11 Kao Corp Absorptive article
JP2002306534A (en) * 2001-04-12 2002-10-22 Uni Charm Corp Disposable briefs type diaper
JP2004141640A (en) * 2002-08-30 2004-05-20 Uni Charm Corp Absorptive article with decoration element
JP2004329873A (en) * 2002-12-13 2004-11-25 Zuiko Corp Production method for article
WO2006017718A1 (en) * 2004-08-05 2006-02-16 The Procter & Gamble Company Disposable pull-on garment

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EG27155A (en) 2015-08-16
EA201070286A1 (en) 2011-02-28
ZA201007316B (en) 2011-08-31
EG27154A (en) 2015-08-16
MX2010002607A (en) 2010-06-01
WO2009031592A1 (en) 2009-03-12
CO6280459A2 (en) 2011-05-20

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