WO2012108331A1 - 粒状体の配置方法および装置 - Google Patents
粒状体の配置方法および装置 Download PDFInfo
- Publication number
- WO2012108331A1 WO2012108331A1 PCT/JP2012/052372 JP2012052372W WO2012108331A1 WO 2012108331 A1 WO2012108331 A1 WO 2012108331A1 JP 2012052372 W JP2012052372 W JP 2012052372W WO 2012108331 A1 WO2012108331 A1 WO 2012108331A1
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- WIPO (PCT)
- Prior art keywords
- carrier web
- suction
- air
- web
- area
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—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 absorbing medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
-
- 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
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—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 absorbing medium
- A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/5323—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
-
- 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
- A61F13/53—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 absorbing medium
- A61F2013/530481—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/53051—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged
- A61F2013/530547—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
- A61F2013/530562—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 absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers being arranged in discontinuous pattern
Definitions
- the present invention relates to a technique for arranging an aggregate group of granular materials in a predetermined pattern on a breathable carrier web.
- Disposable wearing articles such as disposable diapers, pants or feminine sanitary products have an absorbent main body that absorbs body fluids.
- Such an absorbent main body is a sandwich structure in which an absorbent core is sandwiched between two webs.
- Patent Document 1 a large number of granular aggregate groups are arranged separately in the vertical and horizontal directions, and two webs are sealed (joined) between the aggregate groups to arrange the aggregate groups. Holds the pattern.
- an object of the present invention is to provide a method and an apparatus for arranging granular materials that can prevent some granular materials from protruding from a predetermined area when an aggregate group of granular materials is arranged in a predetermined pattern. is there.
- the method of the present invention is a method in which a plurality of granules are arranged in each of a plurality of arrangement areas partitioned from each other in a predetermined pattern, and the first surface of a carrier web having air permeability. Holding the carrier web on the transport surface of the transport device, transporting the carrier web along a predetermined transport path, and placing the granular material on the second surface opposite to the first surface of the carrier web being transported Supplying each of the suction areas corresponding to the suction holes on the second surface of the carrier web by sucking the first air from the plurality of suction holes formed on the transport surface through the carrier web.
- the remaining part of the plurality of granules on the area is scattered toward at least one suction area, and the granules are arranged on the carrier web in the predetermined pattern for each arrangement area.
- a step of performing is performed.
- the apparatus of the present invention comprises a transport device for transporting the carrier web along a predetermined transport path while holding the first surface of the air-permeable carrier web on the transport surface, and the carrier web being transported.
- a suction device including a supply device for supplying the granular material on a second surface opposite to the first surface; and a plurality of suction holes formed in the transport surface;
- a suction device for sucking a part of the plurality of granular materials for each suction area corresponding to each suction hole on the second surface of the carrier web, and the plurality of the transport surface Including a second air discharge hole that opens in a non-suction area between one suction hole and another suction hole of the suction holes, in a state where the suction of the first air, From the discharge hole of the carrier web
- the second air that has passed through the carrier web from the second surface causes the remaining one of the plurality of granules on the non-suction area to be discharged.
- the first air is sucked into the plurality of suction holes formed on the conveying surface via the carrier web, whereby the granular material is held on the carrier web according to the pattern, and the second air is also sucked into the carrier web.
- the particulate matter is scattered in the non-suction area of the carrier web.
- the scattered granular material is sucked into a suction area corresponding to a suction hole on the carrier web, and the granular material is arranged in a predetermined pattern on the carrier web.
- FIG. 1 is a plan view of a wearing article according to Example 1 of the present invention.
- FIG. 2 is an exploded perspective view of the absorbent main body of the wearing article.
- 3A is a partially enlarged plan view of the same absorbent main body
- FIG. 3B is a sectional view thereof
- FIG. 3C is an enlarged plan view showing one arrangement area
- FIG. 3D is an enlarged plan view showing another example of the suction area.
- 4A is a side view showing an apparatus for manufacturing an absorptive main body, which is an arrangement device for granular materials
- FIG. 4B is a plan view showing an airflow deflector.
- FIG. 5 is an enlarged vertical sectional view taken along line VV in FIG. FIG.
- FIG. 6 is an enlarged cross-sectional view of the arrangement device in the upstream portion of the airflow deflector.
- FIG. 7 is an enlarged cross-sectional view of the downstream portion of the airflow deflector.
- FIG. 8 shows another example of the placement device, and is an enlarged longitudinal sectional view of the placement device.
- FIG. 9 is an enlarged cross-sectional view of the arrangement device in the upstream portion of the transport path.
- FIG. 10 is an enlarged cross-sectional view of the downstream portion of the transport path.
- FIG. 11A and FIG. 11B are plan views showing other examples of the arrangement pattern and the seal pattern, respectively.
- a sandwich structure is produced by covering the second surface of the carrier web and the granules with a cover web.
- the cover is formed to generate a sandwich structure in which the cover web covers the second surface of the carrier web and the granular material in the state of suction and discharge.
- An introduction device for introducing a web into the conveyance path, and the granular material in each of the arrangement areas arranged in the predetermined pattern move from one arrangement area to another arrangement area of the plurality of arrangement areas.
- the apparatus further includes a joining device for joining the carrier web and the cover web at a portion corresponding to the non-suction area.
- the bonding may be performed by using an adhesive in addition to welding, but in a further preferred embodiment of the method of the present invention, the bonding step is performed by welding the two webs together.
- the bonding may be performed by using an adhesive in addition to welding, but in a further preferred embodiment of the apparatus of the present invention, the bonding apparatus is a welding apparatus for welding the two webs together.
- the webs When joining both webs with an adhesive, the webs can be joined to each other even if a small amount of particulate matter remains between the two webs in the non-suction area. Remaining granular materials that are foreign matter in the non-suction area significantly reduce the bonding reliability. Therefore, when the two webs are welded together and joined, the effect of the method of the present invention becomes remarkable.
- the air flow deflector facing the second surface of the carrier web causes flow in a direction along the second surface of the carrier web to at least part of the first air.
- the method further includes the step of applying a component, moving the granular material in the non-suction area on the carrier web toward the suction area, and arranging the granular material on the carrier web in the predetermined pattern.
- the apparatus is provided on the upstream side of the transport path of the carrier web with respect to the introduction device, facing the second surface of the carrier web, and at least of the first air
- An airflow deflector that imparts a flow component in a direction along the second surface of the carrier web to a part thereof is further provided.
- the airflow deflector facing the second surface of the carrier web prevents the first air from flowing in the normal direction perpendicular to the second surface. Therefore, a component of the flow in the direction along the second surface is given to a part of the 1 air. This flow component moves the particulates in the non-suction area on the carrier web along the second surface of the carrier web toward the suction area.
- a plurality of granular materials can be arranged in the predetermined pattern for each arrangement area, and the granular material can be prevented from protruding from the suction area of the predetermined pattern.
- Example 1 Embodiment 1 of the present invention will be described below with reference to the drawings.
- 1 to 7 show a first embodiment.
- the wearing article 100 of this example includes an absorbent main body (diaper main body) 200, a front waistline portion 301, and a rear waistline portion 302.
- the absorbent main body 200 includes a front portion 201 that covers the wearer's front torso, a back portion 202 that covers the wearer's rear torso, and a crotch portion 203 that covers the crotch between the front portion 201 and the back portion 202.
- the absorbent main body 200 includes a front portion 201 that covers the wearer's front torso, a back portion 202 that covers the wearer's rear torso, and a crotch portion 203 that covers the crotch between the front portion 201 and the back portion 202.
- the crotch portion 203 is connected to the front portion 201 and the back portion 202 and extends in the vertical direction perpendicular to the waistline direction.
- the front waistline part 301 and the back waistline part 302 may be joined together at the time of wearing, or may be joined beforehand before wearing.
- the absorbent main body 200 may be provided with a three-dimensional gather (not shown). Moreover, you may form in the absorptive main body 200 the leg periphery part constricted along the wearer's leg part.
- an elastic member for fitting the worn article 100 to the wearer may be provided on a portion around the leg of the absorbent main body 200.
- this elastic member for example, a material including a plurality of thread rubbers, flat rubbers, films, or thermoplastic resins can be employed.
- these materials may be provided in the front part 201 and the back part 202 as an elastic member for fitting the wearing article 100 to a wearer.
- the absorbent main body 200 includes a top sheet 21 that contacts the skin surface of the wearer, a cover sheet 22 that does not contact the skin surface, and an absorbent core 23.
- the top sheet 21 and the cover sheet 22 shown in FIG. 3B (welded portion) are welded to each other along lattice-like welding lines L and L extending vertically and horizontally as shown in FIG. 3A and sandwiching the core 23 therebetween.
- the core 23 is surrounded by a top sheet 21 and a cover sheet 22 that are welded to each other along the welding lines L and L.
- the welding site is indicated by xx.
- top sheet 21 and the cover sheet 22 in FIG. 3B are formed of a nonwoven fabric that is liquid permeable and breathable.
- a liquid-impermeable back sheet 24 is attached to the back surface of the cover sheet 22 so that the absorbent main body 200 is covered with the back sheet 24.
- the core 23 is composed of a large number of absorbent particles 3.
- the granular material 3 is made of a well-known absorbent polymer, and generally has an average particle size of about 10 ⁇ m to 1,000 ⁇ m before water is absorbed, and swells after water absorption and has a volume several to several hundred times larger. It becomes. In each figure, the granular material 3 is indicated by a large number of dots.
- the core 23 is formed by arranging each set group 30 in which a large number of the granular bodies 3 are arranged in a large number of arrangement areas D.
- the collective groups 30 and 30 are divided and arranged in the arrangement areas D and D defined by the grid-like welding lines L and L extending in the vertical and horizontal directions. That is, the placement areas D and D in which the collective groups 30 and 30 are placed are partitioned by the welding lines L and L.
- each aggregate group 30 is composed of a large number of granular bodies 3, and as shown in FIG. 3A, one group of the aggregate group 30 and another group connect the welding lines L, L. They are lined up in the vertical and horizontal directions. As shown in FIG.
- FIG. 3C shows one arrangement area D among the plurality of arrangement areas D partitioned from each other in a predetermined pattern and its periphery.
- the one arrangement area D is surrounded by a welding line L.
- the arrangement area D indicated by a two-dot chain line is often set in a region that is slightly larger than the suction area 1B where the plurality of granular materials 3 are sucked. That is, as shown in the figure, the area of the arrangement area D and the suction area 1B so that there is a slight clearance between the welding line L surrounding the arrangement area D and the periphery of the adsorption area 1B.
- the suction area 1B is often included in the arrangement area D.
- a space is provided between the welding line L and the adsorption area 1B. Therefore, when a part of the plurality of granular materials 3 arranged in the adsorption area 1B protrudes from the region of the adsorption area 1B, the protruding granular material 3 is located between the adsorption area 1B and the welding line L. By being arranged in the space, it is possible to suppress a part of the granular body from protruding to the welding line L.
- the arrangement area D and the suction area 1B may be set to the same size area. Further, as shown in FIG.
- the circular suction area 1B may be included in the square arrangement area D.
- the welding lines L do not have to be completely continuous, and the welding sites may be continuously formed to such an extent that the granular material 3 of each group 30 is difficult to move to another group 30. That is, the welding lines L and L are formed to such an extent that the granular material 3 in each set group 30 arranged in a predetermined pattern is prevented from moving from one group to another group among the plurality of groups. It may be.
- the group group 30 may be arranged in a predetermined pattern and does not need to be regularly arranged vertically and horizontally. Moreover, the number of the granular materials 3 included in each aggregate group 30 does not need to be equal to each other, and may be a distribution that matches the amount of body fluid excreted.
- the size of the collective group 30 may be a rectangle or a circle of about several mm to 10 mm. Further, the pitch of arrangement of the collective groups 30 and 30 may be about 10 mm to about several tens of mm.
- This arrangement device is arranged around a transport drum (an example of a transport device) 4, a supply device 5, an airflow deflector 6, first, second and third introduction rollers 71, 72, 73 and an ultrasonic horn (an example of a joining device). 81).
- the first, second and third introduction rollers 71, 72 and 73 are rollers for introducing the carrier web 1, the cover web 2 and the film 9 to the outer periphery of the drum 4, respectively.
- the drum 4 holds the carrier web 1 along a predetermined conveyance path as shown in FIG. 4 while adsorbing and holding the first surface 11 of the air-permeable carrier web 1 with the conveyance surface 41.
- Transport. 5 to 7, the carrier web 1 is drawn thicker than actual.
- the said 1st surface 11 of FIG. 5 forms the skin surface which touches a wearer's skin.
- Countless granular materials 3 are fed to the The countless granular materials 3 are supplied intermittently or continuously by a predetermined amount per unit area of the carrier web 1.
- suction holes 40 are formed (opened) on the transport surface 41.
- the suction hole 40 communicates with a suction source (negative pressure source) (not shown), and the first air ⁇ 1 is sucked into the suction hole 40 through the carrier web 1 and is formed on the second surface 12 of the carrier web 1. Hold the body 3.
- the suction hole 40 and the suction source constitute a suction device.
- a discharge hole 42 is formed (opened) in the non-suction area 4 ⁇ / b> A that is not sucked between the suction hole 40 and the suction hole 40 in the transport drum 4.
- the discharge hole 42 opens in the non-suction area 4A of the transport surface 41 and discharges the second air ⁇ 2.
- the discharge hole 42 communicates with a positive air pressure source (not shown), and the second air ⁇ 2 is discharged from the discharge hole 42 toward the second surface 12 of the carrier web 1.
- the granular material 3 is scattered in the non-suction area 1A on the carrier web 1 by the second air ⁇ 2 that has passed through the carrier web 1 from the second surface 12.
- the discharge hole 42 and the positive pressure source constitute a discharge device.
- the airflow deflector 6 is formed of, for example, a punching plate having a large number of through holes 60, is curved along the transport surface 41 of the transport drum 4 in FIG. 6, and is substantially parallel to the transport surface 41. It is arranged close to In other words, the airflow deflector 6 is provided to face the second surface 12 of the carrier web 1, and the flow of the first air ⁇ ⁇ b> 1 in the normal direction Z perpendicular to the second surface 12 of the carrier web 1. By blocking, the flow components ⁇ r and ⁇ s (FIG. 5) in the directions R and S (FIG. 5) along the second surface 12 of the carrier web 1 are applied to at least a part of the first air ⁇ 1.
- the airflow deflector 6 is fixed to a frame that supports the drum 4, and has a relative speed in the circumferential direction R with respect to the drum 4 that rotates in the circumferential direction R.
- the second introduction roller 72 in FIG. 4A covers the second surface 12 (FIG. 7) and the granular material 3 of the carrier web 1 downstream of the airflow deflector 6 in the conveyance path of the carrier web 1.
- the cover web 2 is introduced into the transport path.
- the third introduction roller 73 in FIG. 4A introduces the film 9 covering the cover web 2 into the conveyance path downstream of the second introduction roller 72 in the conveyance path of the carrier web 1.
- the ultrasonic horn 81 cooperates with the anvil (not shown) formed on the conveyance surface 41 of the conveyance drum 4 in the downstream of the conveyance path of the carrier web 1 with respect to the third introduction web 73, and the vibration energy. Is given to both webs 1 and 2. Thereby, the carrier web 1 and the cover web 2 are welded to each other in the non-suction area 1A of FIG.
- welding by ultrasonic vibration, mechanical vibration is transmitted to the horn 81 of FIG. 4A by ultrasonic waves, and the web is passed between the horn 81 and the anvil in a state where the thermoplastic web is pressurized. They are welded together by frictional heat. Therefore, if the granular material 3 that is a foreign substance remains between the webs 1 and 2 in the non-suction area 1A (FIG. 6), a sealing failure is likely to occur.
- the carrier web 1 is introduced into the transport drum 4 by the first introduction roller 71, and the first surface 11 (FIG. 6) of the carrier web 1 is sucked and held by the transport surface 41 of the transport drum 4.
- the web 1 is transported along a predetermined transport path, that is, along the transport surface 41 of the transport drum 4.
- the granular material 3 is placed on the second surface 12 opposite to the first surface 11 of the carrier web 1 in FIG. Supply. As shown in FIG. 6, the supplied granular material 3 forms a layer on the second surface 12.
- the layer of the granular material 3 may be supplied intermittently for each absorbent main body 200 (FIG. 1).
- the layer of the granular material 3 may be thicker at the center in the axial direction of the transport drum 4 than at both ends.
- the thickness of the layer of the granular material 3 may be thin at the periphery of one absorbent main body 200 (FIG. 1), and may be thick at the center or in the vicinity thereof.
- the first air ⁇ ⁇ b> 1 is sucked through the carrier web 1 from the plurality of suction holes 40 formed in the transport surface 41, and the granular material 3 is adsorbed and held on the second surface 12 of the carrier web 1. Is done.
- the second air ⁇ 2 is discharged from the discharge hole 42 opened in the non-suction area 4A of the transport surface 41 toward the second surface 12 of the carrier web 1 while sucking the first air ⁇ 1. .
- the granular material 3 on the non-suction area 1A is caused by the second air ⁇ 2 that has passed through the carrier web 1 from the second surface 12.
- the scattered granular material 3 is sucked toward the suction area 1B above the suction hole 40 by the first air ⁇ 1.
- the carrier web 1 holding the granular material 3 approaches the air flow deflector 6 while simultaneously sucking and discharging the air. Thereafter, the second surface 12 of the carrier web 1 faces the air flow deflector 6, thereby preventing the flow of the first air ⁇ ⁇ b> 1 in the normal direction Z perpendicular to the second surface 12 of the carrier web 1.
- a part of the flow of the first air ⁇ 1 is obstructed by the real part 61 of the airflow deflector 6 and has the flow components ⁇ r and ⁇ s (FIG. 5) and passes through the through hole 60 of the airflow deflector 6. To the suction hole 40. Therefore, a part of the first air ⁇ 1 flows between the airflow deflector 6 and the carrier web 1 along the circumferential direction R of the transport drum 4 and the axial direction S of FIG.
- the conveying surface 41 holding the granular material 3 continues to rotate while facing the airflow deflector 6, Flow components ⁇ r and ⁇ s (FIG. 5) in a direction along the second surface 12 of the carrier web 1 are applied to at least a part of the first air ⁇ 1.
- the granular material 3 in the non-suction area 1A on the carrier web 1 moves to the suction area 1B, and the granular material 3 is arranged on the carrier web 1 in a predetermined pattern. Is done.
- each aggregate group 30 composed of a plurality of granular bodies 3 is arranged on the carrier web 1 for each of the arrangement areas D partitioned from each other in a predetermined pattern.
- the conveying surface 41 is moved away from the airflow deflector 6 and the second surface 12 of the carrier web 1 and the granular material 3 are the second introduction roller 72.
- the sandwich structure 20 is generated by being covered with the cover web 2 introduced by the above and the film 9 introduced by the third introduction roller 73.
- the carrier web 1 and the cover web 2 are ultrasonically welded at a portion corresponding to the non-suction area 1A of FIG. Is done. Thereby, the predetermined pattern of the granular material 3 is held.
- the suction from the suction hole 40 and the discharge from the discharge hole 42 may be stopped.
- the cover web 2 and the film 9 shown in FIG. 3B are also welded. However, the film 9 may be adhered to the cover web 2 with an adhesive after the carrier web 1 and the cover web 2 are welded.
- the sandwich structure 20 is cut into individual worn article units, that is, individual absorbent body 200 units of FIG.
- Example 2 8 to 10 show the second embodiment. As shown in these figures, the airflow deflector is not provided in this embodiment. In the case of this embodiment as well, as in the examples of FIGS. 5 to 7, as shown in FIGS. 8 to 10, the granular material in the non-suction area 1A of the carrier web 1 as the carrier web 1 goes downstream in the conveyance path. 3 tends to gather in the suction area 1B.
- the method of disposing the granular material 3 in the second embodiment on the suction area 1B of the carrier web 1 is the same as in the first embodiment, and the description thereof is omitted.
- the airflow deflector cannot provide the flow of the first air ⁇ 1 with the flow component in the circumferential direction ⁇ r or the axial direction ⁇ s. Therefore, the action of collecting the granular material 3 scattered by the discharge of the second air ⁇ 2 in the suction area 1B will be lower than that in the first embodiment.
- the formation density of the discharge holes 42 may be higher than that of the first embodiment.
- Other configurations are the same as those in the first embodiment, and the same reference numerals are given to the same or corresponding portions, and detailed description thereof is omitted.
- 11A and 11B show another example of the arrangement pattern and the seal pattern of the granular material 3.
- the shape of the aggregate group 30 (arrangement area D) of the granular bodies 3 in the arrangement pattern may be a rectangle in FIG. 11A or a circle in FIG. 11B. Further, the arrangement of the aggregate group 30 of the granular bodies 3 may be the vertical and horizontal arrangement of FIG. 11A or the triangular arrangement of FIG. 11B.
- the seal pattern for dividing the aggregate group 30 (arrangement area D) of the granular material 3 may be the continuous line of FIG. 1 or the intermittent dot shape of FIG. 11A and FIG. 11B. It may be.
- the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily understand various changes and modifications within the obvious scope by looking at the present specification. For example, you may employ
- a joining method of the carrier web 1 and the cover web 2 in addition to ultrasonic welding, for example, a joining method by heat welding such as heat sealing may be used.
- the “plurality of granular materials” in the present invention is a concept including a case where a powdery material is mixed with a plurality of granular materials in addition to a case where the granular materials are only aggregated. Accordingly, such changes and modifications are to be construed as within the scope of the present invention as defined by the claims.
- This invention can be utilized when arrange
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Abstract
Description
また、このような場合、ウエブ同士を接合する際に、シール装置に粒状体が噛みこみ、シール不良となるおそれがある。
したがって、両ウエブを互いに溶着して接合する場合、本発明方法による効果が顕著となる。
以下、本発明の実施例1が図面にしたがって説明される。
図1~図7は実施例1を示す。
図1に示すように、本実施例の着用物品100は、吸収性本体(オムツ本体)200、前胴回り部301および後胴回り部302を備えている。前記吸収性本体200は、着用者の前胴を覆うフロント部201、着用者の後胴を覆うバック部202、ならびに、前記フロント部201とバック部202との間の股間を覆う股部203を有している。
また、吸収性本体200には、着用者の脚部に沿って括れた脚回り部を形成してもよい。
なお、各図において溶着部位はxxで示される。
なお、各図において粒状体3は多数のドットで示される。
換言すれば、前記各集合グループ30は多数の粒状体3の集まりからなり、図3Aに示すように、前記集合グループ30のうちの1つのグループと別のグループとが前記溶着ラインL,Lを挟んで縦横方向に並んでいる。図3Aに示すように、前記各集合グループは縦横方向に多数(3つ以上)並んでいる。
図3Cは所定のパターンで互いに区画された複数の配置エリアDのうちの1つの配置エリアDおよびその周辺を示す。前記1つの配置エリアDは溶着ラインLに囲まれている。
同図に示すように、二点鎖線で示す前記配置エリアDは複数の粒状体3が吸引される吸引エリア1Bよりも一回り大きな領域で設定されている場合が多いだろう。
すなわち、同図に示すように、前記配置エリアDを囲む溶着ラインLと前記吸着エリア1Bの周縁との間には、若干のクリアランスが存在するように前記配置エリアDおよび前記吸引エリア1Bの領域が設定される場合が多いだろう。つまり、前記吸引エリア1Bが前記配置エリアDに包含されている場合が多いだろう。
この場合、前記溶着ラインLと前記吸着エリア1Bとの間にスペースが設けられることになる。
したがって、前記吸着エリア1Bに配置された複数の粒状体3の一部が前記吸着エリア1Bの領域をはみ出した場合、当該はみ出した粒状体3が前記吸着エリア1Bと前記溶着ラインLとの間のスペースに配置されることで、同粒状体の一部が溶着ラインLまではみ出るのを抑制し得る。
なお、前記配置エリアDと前記吸引エリア1Bとが同じ大きさの領域に設定されていてもよい。
また、図3Dに示すように、丸形の前記吸引エリア1Bが方形の前記配置エリアDに包含されていてもよい。
また、各溶着ラインLは完全に連なっている必要はなく、各集合グループ30の粒状体3が他の集合グループ30に移動しにくい程度に溶着部位が継続的に形成されていてもよい。
つまり、所定のパターンで配置された前記各集合グループ30における粒状体3が前記複数のグループのうちの1つのグループから別のグループへ移動するのを抑制する程度に溶着ラインL,Lが形成されていてもよい。
本配置装置は搬送ドラム(搬送装置の一例)4のまわりに、供給装置5、気流偏向体6、第1、第2および第3導入ローラ71,72,73および超音波ホーン(接合装置の一例)81を備える。
図5の前記第1面11は着用者の肌に接する肌面を形成する。
なお、前記気流偏向体6は前記ドラム4を支持するフレームに固定されており、周方向Rに回転するドラム4に対し周方向Rに相対速度を有する。
超音波振動による溶着(シール)では、機械振動を超音波により図4Aのホーン81に伝送し、熱可塑性のウエブを加圧された状態でホーン81とアンビルとの間を通過させることで、ウエブ同士が摩擦熱により溶着される。したがって、非吸引エリア1A(図6)において両ウエブ1,2間に異物である粒状体3が残存しているとシール不良となり易い。
図4Aに示すように、第1導入ローラ71によりキャリアウエブ1を搬送ドラム4に導入しキャリアウエブ1の第1面11(図6)を搬送ドラム4の搬送面41で吸着保持しながら前記キャリアウエブ1を所定の搬送経路つまり前記搬送ドラム4の搬送面41に沿って搬送する。
粒状体3の層の厚さは搬送ドラム4の軸方向の中央が両端よりも厚くてもよい。また、粒状体3の層の厚さは、1つの吸収性本体200(図1)の周縁において薄く、かつ、中央やその近傍において厚くてもよい。
すなわち、前記非吸引エリア1Aにおける一部の粒状体3が前記吸引エリア1Bにおいて吸引保持されているその他の粒状体3に向って移動する。
その結果、図1に示すように、所定のパターンで互いに区画された前記配置エリアDにごとに、複数の粒状体3からなる各集合グループ30がキャリアウエブ1上に配置される。
前記溶着の際に、図3Bのカバーウエブ2とフィルム9も溶着されるが、前記フィルム9はキャリアウエブ1とカバーウエブ2との溶着後に、カバーウエブ2に接着剤により接着されてもよい。
図8~図10は実施例2を示す。
これらの図に示すように、本実施例では気流偏向体が設けられていない。この実施例の場合も、前記図5~図7の例と同様、図8~図10に示すように、キャリアウエブ1が搬送経路の下流に行くに従いキャリアウエブ1の非吸引エリア1Aの粒状体3が吸引エリア1Bに集まり易い。
本実施例2の場合、実施例1と異なり気流偏向体により第1エアα1の流れに周方向αrや軸方向αsの流れの成分を付与する作用が得られない。そのため、第2エアα2の吐出により飛散した粒状体3を吸引エリア1Bに集める作用が実施例1に比べると低下するだろう。
なお、本実施例2の場合、前記実施例1に対して吐出孔42の形成密度を高くしてもよい。
その他の構成は、前記実施例1と同様であり、同一部分または相当部分に同一符号を付して、その詳しい説明を省略する。
たとえば、搬送装置としてドラムではなくコンベヤを採用してもよい。
また、キャリアウエブ1とカバーウエブ2との接合方法として、超音波溶着の他に、たとえばヒートシールなどの熱溶着による接合方法を用いてもよい。
また、本発明における「複数の粒状体」とは、粒状の材料の集合体のみからなる場合の他に、複数の粒状体に粉状の材料が混合されている場合も含む概念である。
したがって、そのような変更および修正は、請求の範囲から定まる本発明の範囲内のものと解釈される。
2:カバーウエブ、20:サンドイッチ構造体。21:トップシート 、22:カバーシート 、23:コア、24:バックシート
3:粒状体、30:集合グループ、D:配置エリア
4:搬送ドラム、4A:非吸引エリア、40:吸引孔、41:搬送面、42:吐出孔
5:供給装置
6:気流偏向体、60:貫通孔、61:実部、62:板材
71:第1導入ローラ、72:第2導入ローラ、73:第3導入ローラ
81:超音波ホーン
9:フィルム
100:着用物品、200:吸収性本体(オムツ本体)、201:フロント部、202:バック部、203:股部、301:前胴回り部、302:後胴回り部
α1:第1エア、α2:第2エア、αr,αs:流れの成分
R:周方向、S:軸方向、Z:法線方向
Claims (8)
- 所定のパターンで互いに区画された複数の各配置エリアごとに複数の粒状体が配置される方法であって、
通気性を有するキャリアウエブの第1面を搬送装置の搬送面で保持しながら前記キャリアウエブを所定の搬送経路に沿って搬送する工程と、
前記搬送中のキャリアウエブの前記第1面とは反対の第2面上に前記粒状体を供給する工程と、
前記搬送面に形成された複数の吸引孔から前記キャリアウエブを通して第1エアを吸引して前記キャリアウエブの第2面上の前記各吸引孔に相当する各吸引エリアごとに前記複数の粒状体の一部を保持する工程と、
前記第1エアの吸引を行っている状態で、
前記搬送面の前記複数の吸引孔のうちの1つの吸引孔と別の1つの吸引孔との間の非吸引エリアにおいて開口する第2エアの吐出孔から前記キャリアウエブの前記第2面に向って前記第2エアを吐出することで、前記第2面から前記キャリアウエブを通過した前記第2エアにより前記非吸引エリア上の前記複数の粒状体のうちの残りの一部を少なくとも1つの前記吸引エリアに向って飛散させて、前記粒状体を前記キャリアウエブ上に前記所定のパターンで前記各配置エリアごとに配置する工程とを備える。 - 請求項1の方法において、前記粒状体を前記所定のパターンで配置する工程の後に、前記キャリアウエブの前記第2面および前記粒状体をカバーウエブで覆ってサンドイッチ構造体を生成する工程と、
前記所定のパターンで配置された前記各配置エリアの前記粒状体が前記複数の配置エリアのうちの1つの配置エリアから別の配置エリアへ移動するのを抑制するために、前記非吸引エリアに相当する部位において前記キャリアウエブと前記カバーウエブとを接合する工程とを更に備える。 - 請求項2の方法において、前記接合する工程が前記両ウエブを互いに溶着することにより実行される。
- 請求項3の方法において、前記キャリアウエブの前記第2面に対面する気流偏向体により、前記第1エアの少なくとも一部に前記キャリアウエブの前記第2面に沿う方向の流れの成分を付与して、前記キャリアウエブ上の前記非吸引エリアの前記複数の粒状体のうちの残りの一部を少なくとも1つの前記吸引エリアに向って移動させて前記粒状体を前記キャリアウエブ上に前記所定のパターンで配置する工程を更に備える。
- 所定のパターンで互いに区画された複数の各配置エリアごとに複数の粒状体が配置される装置であって、
通気性を有するキャリアウエブの第1面を搬送面で保持しながら前記キャリアウエブを所定の搬送経路に沿って搬送するための搬送装置と、
前記搬送中のキャリアウエブの前記第1面とは反対の第2面上に前記粒状体を供給するための供給装置と、
前記搬送面に形成された複数の吸引孔を包含し前記キャリアウエブを通して第1エアを前記吸引孔に吸引して前記キャリアウエブの前記第2面上の前記各吸引孔に相当する各吸引エリアごとに前記複数の粒状体の一部を吸着するための吸引装置と、
前記搬送面の前記複数の吸引孔のうちの1つの吸引孔と別の1つの吸引孔との間の非吸引エリアにおいて開口する第2エアの吐出孔を包含し、前記第1エアの吸引を行っている状態で、前記吐出孔から前記キャリアウエブの前記第2面に向って前記第2エアを吐出することで、前記第2面から前記キャリアウエブを通過した前記第2エアにより前記非吸引エリア上の前記複数の粒状体のうちの残りの一部を飛散させる吐出装置とを備える。 - 請求項5の配置する装置において、前記吸引と吐出を行った状態において前記キャリアウエブの前記第2面および前記粒状体をカバーウエブが覆ったサンドイッチ構造体を生成するために前記カバーウエブを前記搬送経路に導入するための導入装置と、
前記所定のパターンで配置された前記各配置エリアの前記粒状体が前記複数の配置エリアのうちの1つの配置エリアから別の配置エリアへ移動するのを抑制するために、前記非吸引エリアに相当する部位において前記キャリアウエブと前記カバーウエブとを接合するための接合装置とを更に備える。 - 請求項6の配置する装置において、前記接合装置が前記両ウエブを互いに溶着する溶着装置である。
- 請求項7の配置する装置において、前記導入装置よりも前記キャリアウエブの前記搬送経路の上流において、前記キャリアウエブの前記第2面に対面して設けられ、前記第1エアの少なくとも一部に前記キャリアウエブの前記第2面に沿う方向の流れの成分を付与する気流偏向体を更に備える。
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Also Published As
Publication number | Publication date |
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CN103282001B (zh) | 2014-12-10 |
US9034130B2 (en) | 2015-05-19 |
BR112013020105B1 (pt) | 2021-01-26 |
EP2674141B1 (en) | 2018-04-04 |
EP2674141A4 (en) | 2017-04-19 |
US20130284361A1 (en) | 2013-10-31 |
KR101852473B1 (ko) | 2018-04-26 |
CN103282001A (zh) | 2013-09-04 |
JPWO2012108331A1 (ja) | 2014-07-03 |
BR112013020105A2 (pt) | 2016-10-25 |
EP2674141A1 (en) | 2013-12-18 |
KR20130139315A (ko) | 2013-12-20 |
JP5986507B2 (ja) | 2016-09-06 |
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