WO2021117423A1 - Procédé de fabrication et dispositif de fabrication pour feuille composite étirable - Google Patents

Procédé de fabrication et dispositif de fabrication pour feuille composite étirable Download PDF

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Publication number
WO2021117423A1
WO2021117423A1 PCT/JP2020/042685 JP2020042685W WO2021117423A1 WO 2021117423 A1 WO2021117423 A1 WO 2021117423A1 JP 2020042685 W JP2020042685 W JP 2020042685W WO 2021117423 A1 WO2021117423 A1 WO 2021117423A1
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WIPO (PCT)
Prior art keywords
sheet
joining
region
manufacturing
pattern
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PCT/JP2020/042685
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English (en)
Japanese (ja)
Inventor
隆広 飛田
小林　賢司
祐貴 塚本
到 高濱
Original Assignee
花王株式会社
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Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN202080086252.4A priority Critical patent/CN114829115A/zh
Publication of WO2021117423A1 publication Critical patent/WO2021117423A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
    • 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

Definitions

  • the present invention relates to a method and an apparatus for manufacturing an elastic composite sheet.
  • Patent Document 1 a roll in which a first sheet having elasticity and a second sheet having no elasticity are overlapped and conveyed in the sheet conveying direction to form a bonding pattern, and a roll facing the roll are arranged. It has been proposed that the first sheet and the second sheet are bonded together by sandwiching the seal portion with the press member and forming the seal portion along the transport direction.
  • the present invention relates to a method for manufacturing an elastic composite sheet in which an elastic first sheet and a non-elastic second sheet wider than the first sheet are bonded together.
  • the first sheet is overlapped with a part of the second sheet in a state of being extended in one direction, and the second sheet has only the first region and the second sheet having the first sheet and the second sheet.
  • It is provided with a joining step of intermittently joining the first sheet and the second sheet in the sheet transport direction along the one direction with respect to the laminated sheet having the region.
  • a joining portion is formed not only at the first region but also at the boundary between the first region and the second region.
  • the present invention relates to an apparatus for manufacturing an elastic composite sheet in which an elastic first sheet and a non-elastic second sheet wider than the first sheet are bonded together.
  • the first sheet is overlapped with a part of the second sheet in a state of being extended in one direction, and the second sheet has only the first region and the second sheet having the first sheet and the second sheet.
  • It has a joining means for intermittently joining the first sheet and the second sheet in the sheet transport direction along the one direction with respect to the laminated sheet having the region.
  • the joining means forms a joining portion not only at the first region but also at the boundary portion between the first region and the second region.
  • FIG. 1 is a schematic view showing a preferable manufacturing method and manufacturing apparatus of the stretchable composite sheet of the present invention.
  • FIG. 2 is a perspective view of a tooth groove stretching device included in the manufacturing device.
  • FIG. 3 is a perspective view showing a precursor manufacturing process of a stretchable sheet in a preferable manufacturing method of the stretchable composite sheet of the present invention.
  • FIG. 4 is a diagram for explaining the joining means according to the first embodiment of the present invention and the joining pattern of the joining portion by the joining means, and FIG. 4A is an enlarged view showing the configuration and the boundary portion of the joining means. b) is an enlarged view showing a joining pattern.
  • FIG. 5A and 5B are views for explaining the joining means according to the second embodiment of the present invention and the joining pattern of the joining portion by the joining means
  • FIG. 5A is an enlarged view showing the configuration and the boundary portion of the joining means.
  • b) is an enlarged view showing a joining pattern.
  • FIG. 6 is a diagram for explaining the joining means according to the third embodiment of the present invention and the joining pattern of the joining portion by the joining means
  • FIG. 6A is an enlarged view showing the configuration and the boundary portion of the joining means.
  • b) is an enlarged view showing a joining pattern.
  • 7A and 7B are views for explaining the joining means according to the modified example of the present invention and the joining pattern of the joining portion by the joining means, FIG.
  • FIG. 7A is an enlarged view showing the configuration and the boundary portion of the joining means
  • FIG. 7B is an enlarged view. It is an enlarged view which shows the joining pattern.
  • 8A and 8B are views for explaining the joining means according to the modified example of the present invention and the joining pattern of the joining portion by the joining means
  • FIG. 8A is an enlarged view showing the configuration and the boundary portion of the joining means
  • FIG. 8B is an enlarged view.
  • FIG. 9 is a diagram illustrating the relationship between the width of the second region and the width of the joining pattern.
  • FIG. 10 is a diagram showing one form of a stretchable composite sheet product manufactured by the manufacturing method and the manufacturing apparatus according to the present invention.
  • Patent Document 1 a sealing portion is formed by using a joining pattern, but since the sealing portion by the joining pattern does not reach the boundary between the first sheet and the second sheet, the boundary portion that is a non-joining portion is formed. It may be rolled up.
  • the present invention relates to a method and an apparatus for manufacturing an elastic composite sheet that can eliminate the above-mentioned drawbacks of the prior art.
  • FIG. 1 is a diagram showing an outline of a preferable manufacturing method of the stretchable composite sheet 1 and the manufacturing apparatus 100, which is an embodiment of the method of manufacturing the stretchable composite sheet and the manufacturing apparatus of the present invention.
  • the method for manufacturing the stretchable composite sheet 1 shown in FIG. 1 includes a precursor manufacturing step for manufacturing a composite material 2A which is a precursor of the stretchable composite sheet 1 and a stretching process for the composite material 2A to obtain the stretchable sheet 2.
  • the stretchable composite sheet 1 is manufactured by having a stretchability expression treatment step for obtaining the stretchability and a sheet sealing step for laminating and joining a plurality of sheets having different properties.
  • the plurality of sheets referred to here are the stretchable sheet 2 as the first sheet and the non-stretchable sheet 3 as the second sheet.
  • a plurality of elastic filaments 21 are joined to the sheet materials 20 and 20 so as to extend in one direction and in a substantially non-extended state to expand and contract.
  • a composite material 2A which is a precursor of the sex sheet, is obtained. More specifically, while a large number of elastic filaments 21 in a molten state spun from the spinning nozzle 16 are taken up and stretched at a predetermined speed, the elastic filaments 21 do not intersect with each other before the elastic filaments 21 are solidified.
  • the elastic filaments 21 are welded to a sheet containing a fiber material, preferably two sheet materials 20 and 20 made of a non-woven fabric so as to be arranged in one direction.
  • the composite material 2A as a precursor of the elastic sheet in which the plurality of elastic filaments 21 are bonded to the sheet materials 20 and 20 over their entire lengths in a substantially non-extended state is manufactured.
  • the spinning nozzle 16 shown in FIG. 3 is provided on the spinning head 17, and the spinning head 17 is connected to the extruder.
  • the resin can also be supplied to the spinning head 17 via a gear pump.
  • the elastic resin melt-kneaded by the extruder is supplied to the spinning head 17.
  • a large number of spinning nozzles 16 are linearly arranged in a row on the spinning head 17.
  • the spinning nozzles 16 are arranged along the width direction of the two sheet materials 20, 20.
  • the spun molten elastic filament 21 merges with the two sheet materials 20 and 20 unwound from the original fabric at the same speed, and is sandwiched between the two sheet materials 20 and 20 at a predetermined speed. It will be taken over.
  • the elastic filament 21 merges with the two sheet materials 20 and 20 before solidification, that is, in a weldable state. As a result, the elastic filament 21 is welded to the sheet materials 20 and 20 in a state of being sandwiched between the two sheet materials 20 and 20. That is, the elastic filament 21 and the two sheet materials 20 and 20 are welded only by the heat of fusion caused by the elastic filament 21 that can be welded. As a result, the obtained elastic sheet 2 is less likely to have the hardness that occurs when the adhesive is applied to the entire boundary surface of the sheet materials 20 and 20, and is excellent in flexibility as a sheet. When the elastic filaments 21 are merged with the two sheet materials 20, 20, the elastic filaments 21 are arranged in one direction without intersecting each other.
  • an elasticity expression treatment step that makes the sheet material 20 expandable is performed.
  • the sheet materials 20 and 20 are stretched by using the tooth groove stretching device 25.
  • This stretching treatment is a treatment in which the composite material 2A is stretched along the extending direction of the elastic filament 21 to impart extensibility to the sheet materials 20 and 20.
  • the imparting of extensibility here includes a case where the extensibility of the sheet material having some extensibility is greatly improved.
  • the tooth groove stretching device 25 shown in FIG. 2 has teeth that are ridges extending in the axial direction and grooves formed between the teeth and extending in the axial direction alternately in the circumferential direction, and each other. It includes a pair of tooth groove rolls 26 and 27 that mesh with each other.
  • the composite material 2A obtained in the precursor manufacturing step is supplied between the pair of tooth groove rolls 26 and 27, and the composite material 2A is stretched.
  • the stretchable sheet 2 in which the sheet materials 20 and 20 contained in the composite material 2A can be stretched is obtained.
  • As the tooth profile of the tooth groove rolls 26 and 27, a general involute tooth profile and a cycloid tooth profile are used, and those having a narrowed tooth width are particularly preferable.
  • FIG. 1 shows a case where the composite material 2A is wound into a roll shape to form a roll-shaped material 2R, and then the composite material 2A unwound from the roll-shaped material 2R is subjected to a stretching treatment.
  • the produced composite material 2A may be introduced into a tooth groove stretching device using the tooth groove rolls 26 and 27 without being wound into a roll shape.
  • the obtained stretchable sheet 2 is in a state of being stretched in the sheet transport direction MD which is one direction, and is merged with the non-stretchable sheet 3 and laminated under the stretched state to become a laminated sheet 10.
  • the stretchable sheet 2 and the non-stretchable sheet 3 are joined to each other by the ultrasonic sealing device 40 as a joining means, and are bonded to each other to form the stretchable composite sheet 1.
  • a region forming step of superimposing the stretchable sheet 2 and the non-stretchable sheet 3 is performed before the sheet sealing step.
  • the sheet sealing step is a joining step of forming a joining portion 5 according to the joining pattern 6 at the boundary portion 4 between the first region A1 and the second region A2 in addition to the first region A1.
  • the width X2 of the non-stretchable sheet 3 in the width direction CD orthogonal to the sheet transport direction MD is formed wider than the width X1 of the stretchable sheet 2 in the width direction CD.
  • the ends 2a and 2b of the elastic sheet 2 located in the width direction CD extend in the sheet transport direction MD and have a linear shape parallel to each other.
  • the ends 3a and 3b of the non-stretchable sheet 3 located in the width direction CD extend in the sheet transport direction MD and have a linear shape parallel to each other.
  • the stretchable sheet 2 is located at the center of the widthwise CD of the non-stretchable sheet 3. , Laminate so that each end is parallel. Therefore, in the region forming step, the first region A1 and the second region A2 are formed in the width direction CD in the laminated sheet 10. As a result, the stretchable composite sheet 1 includes a first region A1 and a second region A2.
  • the stretchable sheet 2 is overlapped with a part of the non-stretchable sheet 3 in a state of being stretched in one direction, and the first region A1 having the stretchable sheet 2 and the non-stretchable sheet 3 and A laminated sheet 10 having a second region A2 having only the non-stretchable sheet 3 is formed.
  • one direction is the same as the sheet transport direction MD.
  • the laminated sheet 10 provided with the first region A1 and the second region A2 has a boundary portion 4 and a first region A1 formed on both sides of the stretchable sheet 2 and the non-stretchable sheet 3 in the sheet sealing step. Is sealed by means of joining.
  • the boundary portions 4 are formed so as to extend linearly in the sheet transport direction MD.
  • the second region A2 having only the non-stretchable sheet 3 is embossed by a joining means.
  • FIG. 4A the boundary portion 4 and the joint portion 5 on one side are enlarged and shown. That is, in the sheet sealing step, the stretchable sheet 2 and the non-stretchable sheet 3 are intermittently joined to the sheet transport direction MD.
  • any device capable of joining the stretchable sheet 2 and the non-stretchable sheet 3 can be used as the joining means used for the sealing process, and for example, a heat sealing device, an ultrasonic sealing device, and a high frequency sealing device. Etc. can be used.
  • the ultrasonic sealing device 40 is used. As shown in FIG. 1, the ultrasonic sealing device 40 has a support roll 41 having a joining pattern 6 in which the joining convex portions 9 are formed at intervals in the sheet transport direction MD, and an outer peripheral surface 41a of the support roll 41.
  • the stretchable sheet 2 and the non-stretchable sheet 3 [laminated sheet 10] arranged to face each other and transported in the sheet transport direction MD are sandwiched between the outer peripheral surface 41a of the support roll 41 and the joint portion 5 (see FIG. 4).
  • the ultrasonic horn 42 is provided as a press member for forming the above.
  • the joining pattern 6 means an arrangement pattern of joints between the stretchable sheet 2 and the non-stretchable sheet 3, and the joining pattern 6 formed on the support roll 41 is a combination of the stretchable sheet 2 and the non-stretchable sheet 3. It means the arrangement pattern of the convex portion 9 for joining corresponding to the arrangement pattern of the joining portion.
  • the support roll 41 is a support roll that supports the surface of the laminated sheet 10 opposite to the ultrasonic wave application surface directed toward the ultrasonic horn 42 side.
  • a joining pattern 6 forming the joining portion 5 is formed on the tip surface of the ultrasonic horn 42 or the outer peripheral surface 41a of the support roll 41.
  • a large number of bonding convex portions 9 forming a bonding pattern 6 are provided on the outer peripheral surface 41a of the support roll 41 so as to project from the outer peripheral surface 41a.
  • a plurality of these bonding convex portions 9 are arranged on the outer peripheral surface 41a of the support roll 41 so that a desired bonding pattern 6 can be obtained.
  • the bonding convex portion 9 is formed as a cylindrical convex portion.
  • the desired bonding pattern 6 is a pattern that positions the boundary portion 4 at least within the pattern forming region.
  • FIG. 4B shows a partially enlarged view of the joining pattern 6.
  • the joining pattern 6 is arranged so that the joining convex portion 9 is located at least on the boundary portion 4 and the joining portion 5 is formed over the boundary portion 4.
  • the joining pattern 6 is formed so that the joining portion 5 is also formed at the boundary portion 4 between the first region A1 and the second region A2 in addition to the first region A1.
  • the bonding convex portion 9 is formed as a cylindrical convex portion.
  • a large number of bonding protrusions 9 are arranged side by side at predetermined intervals in the sheet transport direction MD and the width direction CD direction. As shown in FIG.
  • the predetermined spacing to the width direction CD is the pitch L between the centers of the joining convex portion 9 and the joining convex portion 9 adjacent to each other in the width direction CD.
  • the predetermined interval to the sheet transport direction MD is the pitch X between the centers of the joining convex portion 9 and the joining convex portion 9 that are adjacent to each other in the sheet transport direction MD (circumferential direction).
  • the joining pattern 6 is formed by arranging a large number of joining convex portions 9 arranged at the center-to-center pitch L and the center-to-center pitch X linearly in the circumferential direction of the support roll 41.
  • the joining pattern 6 is a joining pattern in which convex portions 9 for joining are formed on the CD in the width direction at predetermined intervals. That is, the support roll 41 has a joining pattern 6 in which the joining convex portions 9 are formed at predetermined intervals in the sheet transport direction MD and the circumferential direction. In the present embodiment, the circumferential direction is the same as the sheet transport direction MD.
  • a part of the convex portions 9 for joining of the joining pattern 6 are brought into contact with the CD in the width direction so as to straddle the boundary portion 4 to form the joining portion 5.
  • the joining convex portions 9 are arranged so that a row of joining portions 5 is formed in the sheet conveying direction MD, and the joining pattern 6 is arranged at the boundary portion 4 at predetermined intervals in the sheet conveying direction MD. It is designed to form a joint. That is, the joint portion 5 is formed by gathering together the joint portions formed by one of the convex portions 9 for joining.
  • the joining convex portions 9 intermittently and linearly arranged in the sheet transporting direction MD form an intermittent row of joining portions 5 in the sheet transporting direction MD.
  • a plurality of bonding convex portions 9 arranged in the circumferential direction as an example in the width direction CD
  • a plurality of bonding points can be formed in the sheet transport direction MD and the width direction CD.
  • the boundary portion 4 is located in the joint region formed by the joint pattern 6, and at least one row of the joint portions 5 is formed so as to straddle the boundary portion 4.
  • a joining pattern 6 of a region extending in the sheet transport direction MD and the width direction CD is formed at one time, and a large number of joining portions 5 are formed by the joining pattern 6. That is, in the first embodiment, the line segment ⁇ connecting the centroids of the row of joints 5 which are adjacent patterns in the sheet transport direction MD of the joint pattern 6 is parallel to the sheet transport direction MD.
  • the laminated sheet 10 is sandwiched between the support roll 41 and the ultrasonic horn 42, and ultrasonic waves are applied to the laminated sheet 10 by the ultrasonic horn 42.
  • the sheet material constituting the non-stretchable sheet 3 is melted or softened, and the stretchable sheet 2 and the non-stretchable sheet 3 are partially joined by the joining pattern 6 to form a joint portion 5. It is formed.
  • the ultrasonic wave application surface of the laminated sheet 10 directed toward the ultrasonic horn 42 may be formed of the elastic sheet 2 or the non-stretchable sheet 3, but the ultrasonic horn 42 may be formed of the ultrasonic horn 42. It is preferably formed by the non-stretchable sheet 3 from the viewpoint of damage to the stretchable sheet 2 due to frictional resistance and elasticity at the time of forming the composite sheet.
  • reference numerals 28 and 29 are nip rolls
  • reference numeral 3R is a roll-like material wound around the non-stretchable sheet 3.
  • the support roll 41 may be a rotary drive or a driven roll that is carried around the sheet to be conveyed. Further, a non-rotating support member may be used instead of the support roll 41.
  • the joint portion 5 in the sheet sealing step, in addition to the first region A1, the joint portion 5 is formed so as to straddle the boundary portion 4 between the first region A1 and the second region A2. .. Therefore, since the boundary portion 4 that has not been joined in the past can be joined, it is possible to provide a manufacturing method and a manufacturing apparatus 100 for the stretchable composite sheet 1 in which the boundary portion 4 is not rolled up.
  • the bonding convex portion 9 is formed as a convex portion (bonding convex portion 9) formed at intervals in the width direction CD. Therefore, when the direction in which the elastic filament 21 of the elastic composite sheet 1 extends is the sheet transport direction MD, the joint portion 5 is intermittently formed even in the width direction CD orthogonal to the sheet transport direction MD, and the stretchable composite sheet is formed. It is preferable in that the elasticity and flexibility of the sheet 1 can be improved. Further, in the present embodiment, the joining pattern 6 is formed on the outer peripheral surface 41a of the support roll 41, but the joining pattern is formed by arranging the joining convex portions 9 on the surface of the ultrasonic horn 42 in contact with the laminated sheet 10. You may.
  • the direction in which the elastic filament 21 extends is set as the sheet transport direction MD of the laminated sheet 10, and ultrasonic vibration is applied to the ultrasonic horn 42 to form the joint portion 5 in the sheet transport direction MD of the laminated sheet 10. Then, the laminated sheet 10 in which the joint portion 5 is formed in the direction in which the elastic filament 21 extends is obtained.
  • the joint portion 5 is a seal portion intermittently formed in the direction orthogonal to the direction in which the elastic filament 21 extends, and the joint portion 5 is formed in the direction orthogonal to the direction in which the elastic filament 21 extends, like the elastic composite sheet 1. Is formed, which is preferable from the viewpoint of improving the flexibility of the sheet.
  • the joining pattern formed on the ultrasonic horn 42 means an arrangement pattern of the joining convex portions 9 arranged so as to correspond to the arrangement pattern of the joining portion between the elastic sheet 2 and the non-stretchable sheet 3.
  • the line segment ⁇ connecting the centroids of the row of joints 5 which are adjacent patterns in the sheet transport direction MD of the joint pattern 6 is parallel to the sheet transport direction MD, but the second embodiment.
  • the joining pattern 6A is formed so that the joining portion 5A is formed so as to be inclined with respect to the sheet transport direction MD. That is, in the sheet transport direction MD of the joint pattern 6A, the line segment ⁇ connecting the centroids of the adjacent rows of the joint portions 5 is inclined with respect to the sheet transport direction MD.
  • the bonding convex portions 9 arranged in series with the outer peripheral surface 41a of the support roll 41 are arranged obliquely with respect to the outer peripheral surface 41a of the support roll 41 so as to be inclined with respect to the sheet transport direction MD.
  • the joint portion 5A corresponding to the joint portion 5 described in the first embodiment is formed so as to be inclined with respect to the sheet transport direction MD, so that the joint portion 5A is formed at the boundary portion 4. It is formed so as to straddle diagonally.
  • any one of the joint portions 5A is formed.
  • the convex portion 9 for joining is formed so as to straddle the boundary portion 4. Therefore, it is possible to provide a manufacturing method and a manufacturing apparatus 100 for the stretchable composite sheet 1 in which the boundary portion 4 can be reliably joined by the joining portion 5A even when the sheet meanders and the boundary portion 4 is not rolled up. it can.
  • a joining pattern 6B is formed in which the angle ⁇ of the line segment ⁇ described in the second embodiment is alternately switched with respect to the sheet transport direction MD. ing. That is, it is formed so that the inclined angle ⁇ of the line segment ⁇ changes periodically and symmetrically with respect to the sheet transport direction MD.
  • the joint convex portion 9 arranged in series with the outer peripheral surface 41a of the support roll 41 is inclined symmetrically with respect to the sheet transport direction MD.
  • the support rolls 41 are formed so that their positions are alternately displaced from each other in the circumferential direction and become slanted (zagged).
  • the joint portion 5B is formed in a zigzag pattern with respect to the sheet transport direction MD. Therefore, as shown in FIG. 6, the joint portion 5B is formed so as to diagonally and alternately straddle the boundary portion 4. .. Therefore, it is possible to provide a method and a manufacturing apparatus 100 for the stretchable composite sheet 1 which can join the boundary portion 4 even when the sheet meanders and is more likely to be rolled up at the boundary portion 4. In addition, the appearance of the article manufactured from the stretchable composite sheet 1 can be improved.
  • the present invention is not limited to the specific embodiment, and unless otherwise specified in the above description, the present invention described in the claims.
  • a linear zigzag as shown in FIG.
  • the configuration may include a curved joint portion that periodically changes symmetrically with respect to the sheet transport direction MD.
  • the joint convex portion 9 forming the joint pattern for forming the curved joint portion is periodically changed symmetrically with respect to the sheet transport direction MD with respect to the circumferential direction of the support roll 41. It may be arranged in a changing curve in which the directions alternate. When such a curved joint portion that periodically changes symmetrically with respect to the sheet transport direction MD is formed, it is preferable because it has the same effect as that of the second embodiment.
  • the angle ⁇ is preferably 0.01 ° or more, more preferably 0.3 ° or more, still more preferably 0.5 ° or more, preferably 45 ° or less, more preferably 5 ° or less, still more preferably 1 °. It is preferably 0.01 ° or more and 45 ° or less, more preferably 0.3 ° or more and 5 ° or less, and further preferably 0.5 ° or more and 1 ° or less.
  • the joining patterns 6 to 6B are formed as a dot-like pattern in which a plurality of cylindrical joining convex portions 9 are arranged at intervals in the sheet transport direction MD and the width direction CD, but the joining pattern 6 ⁇ 6B is not limited to the dot-shaped pattern.
  • a line-shaped joining pattern 6C is formed on the outer peripheral surface 41a of the support roll 41 by forming the joining convex portions 9B protruding from the outer peripheral surface 41a and extending in the roll axis direction at intervals in the circumferential direction. be able to.
  • the joining portion is intermittent in the sheet transport direction MD and continuous in the width direction CD. Since 5C can be formed so as to straddle the boundary portion 4, it is preferable because it has the same effect as that of the first embodiment.
  • all the joint portions 5A formed by the dot-shaped joint pattern 6A are formed so as to be inclined in one direction with respect to the sheet transport direction MD.
  • a joint pattern 6D having a different pattern in which the joint portion 5D divided into the inclined region V1 and the non-inclined region V2 can be formed may be formed.
  • a region Y1 in which the convex portion 9 for joining is arranged in a straight line along the sheet transporting direction MD and a region in which the bonding convex portion 9 is arranged in a straight line inclining with respect to the sheet transporting direction MD.
  • the bonding convex portion 9 is arranged so that it is divided into Y2 and these two regions are adjacent to each other and formed on the outer peripheral surface 41a. Then, at least one of the joining convex portions 9 located in any region is arranged so as to be located on the boundary portion 4.
  • the joining portion 5D can be formed so as to straddle the boundary portion 4 by the joining convex portion 9 in any region.
  • the bonding convex portion 9 formed in the inclined region Y1 is opposed to the boundary portion 4 so as to straddle the boundary portion 4.
  • the width A of the second region A2 in the width direction CD and the width B (joint width) of the joint pattern 6 formed in the second region A2 by the ultrasonic sealing device 40 will be described. ..
  • the width B of the bonding pattern 6 formed in the second region A2 by the ultrasonic sealing device 40 is 5% or more of the width A of the second region A2 in the width direction CD. It is set.
  • the bonding pattern 6 is also formed in the second region A2 where only the non-stretchable sheet 3 exists, so that the rigidity of the non-stretchable sheet 3 in the second region A2 is partially increased.
  • the width B of the bonding pattern 6 with respect to the width A of the second region A2 is preferably 5% or more, more preferably 20% or more, still more preferably 50% or more, preferably 100% or less, and more. It is preferably 95% or less, more preferably 90% or less, preferably 5% or more and 100% or less, more preferably 20% or more and 95% or less, still more preferably 50% or more and 90% or less.
  • FIG. 10 shows a diaper 200, which is an example of a pants-type direct-use article manufactured from an elastic composite sheet 1 manufactured by a manufacturing method using the manufacturing apparatus 100 according to the present invention.
  • a rectangular absorber 201 is attached to the elastic composite sheet 1 transported in the sheet transport direction MD with the longitudinal direction in the width direction, and the absorber 201 is sandwiched in the sheet transport direction.
  • Leg holes 202 are formed upstream and downstream.
  • the boundary portion 4 When the boundary portion 4 is formed on the inner surface of the diaper facing the skin, the rolled-up portion comes into contact with the skin, which is not satisfactory in terms of usability, and the boundary portion 4 is located on the outer surface of the diaper. If you do, it will spoil the appearance.
  • the joint portion since the joint portion is formed so as to straddle at least the boundary portion 4 to prevent the sheet from rolling, the boundary portion 4 and the joint portion are located on the inner surface surface of the diaper and the outer surface of the diaper. However, the usability and appearance are not impaired.
  • the diaper 200 shown in FIG. 10 is manufactured from the stretchable composite sheet 1 manufactured by the manufacturing method described in the third embodiment.
  • the joint portion 5B of the boundary portion 4 between the elastic sheet 2 and the non-stretchable sheet 3 is formed in a zigzag manner at the boundary portion 4. Therefore, when the joint portion 5B is located on the inner surface of the diaper in contact with the skin, the boundary portion 4 is prevented from curling, so that the diaper feels good on the skin. Further, when the joint portion is located on the outer surface of the diaper that does not come into contact with the skin, the appearance of the appearance is not impaired because the boundary portion 4 is not curled up.
  • the sheet materials 20 and 20 constituting the stretchable sheet 2 include non-woven fabrics such as air-through non-woven fabric, heat roll non-woven fabric, spunlace non-woven fabric, spunbond non-woven fabric, and melt blown non-woven fabric, respectively. Can be used. These non-woven fabrics can be continuous filament or short fiber non-woven fabrics.
  • the sheet materials 20 and 20 may be of the same type or different types.
  • the term "same type of sheet material” as used herein means a sheet in which the manufacturing process of the sheet material, the type of the constituent fibers of the sheet material, the fiber diameter and length of the constituent fibers, the thickness and the basis weight of the sheet material, etc. are all the same. It means materials. When at least one of these is different, it is a "heterogeneous sheet material".
  • non-stretchable sheet 3 the same sheet materials as those exemplified as the sheet materials 20 and 20 constituting the stretchable sheet 2 can be used.
  • the non-stretchable sheet 3 may be of the same type as or different from one or both of the sheet materials 20 constituting the stretchable sheet 2.
  • the thickness of the non-stretchable sheet 3 in a single state is preferably 0.1 mm or more, more preferably 0.12 mm or more, still more preferably 0.15 mm or more, still more preferably 0.18 mm or more, preferably 1 mm.
  • it is more preferably 0.8 mm or less, still more preferably 0.7 mm or less, still more preferably 0.5 mm or less, and more preferably 0.1 mm or more and 1 mm or less, more preferably 0.12 mm or more and 0.8 mm or less.
  • It is more preferably 0.15 mm or more and 0.7 mm or less, and even more preferably 0.18 mm or more and 0.5 mm or less.
  • the thickness is measured by sandwiching it between flat plates with a load of 0.5 cN / cm 2 and measuring the distance between the flat plates.
  • substantially inelastic inelastic fibers can be used, in which case the sheet materials 20 and 20 are mainly composed of the inelastic fibers.
  • the substantially inelastic inelastic fiber include fibers made of polyester such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), and a polyamide.
  • the constituent fibers may be short fibers or long fibers, and may be hydrophilic or water repellent.
  • core-sheath type or side-by-side type composite fibers can also be used. These fibers may be used alone or in combination of two or more.
  • a preferable example of the constituent fibers of the sheet materials 20 and 20 and the non-stretchable sheet 3 is one composed of two or more components, a low melting point component and a high melting point component.
  • a core-sheath type composite fiber is preferable, and a core having a high melting point PET or PP and a sheath having a low melting point PET, PP or PE is preferable.
  • the elastic filament 21 is made of an elastic resin such as a thermoplastic elastomer or rubber as a raw material.
  • an elastic resin such as a thermoplastic elastomer or rubber
  • melt spinning using an extruder is possible as in the case of a normal thermoplastic resin, and the elastic filament thus obtained is easily heat-sealed, so that it is stretchable.
  • thermoplastic elastomer examples include styrene such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene).
  • SBS styrene-butadiene-styrene
  • SIS styrene-isoprene-styrene
  • SEBS styrene-ethylene-butadiene-styrene
  • SEPS styrene-ethylene-propylene-styrene
  • Examples thereof include olefin-based elastomers (ethylene-based ⁇ -olefin elastomers, propylene-based elastomers obtained by copolymerizing ethylene, butene, octene, etc.), polyester-based elastomers, polyurethane-based elastomers, etc., and one of these may be used alone or. Two or more types can be used in combination.
  • olefin-based elastomers ethylene-based ⁇ -olefin elastomers, propylene-based elastomers obtained by copolymerizing ethylene, butene, octene, etc.
  • polyester-based elastomers polyester-based elastomers
  • polyurethane-based elastomers etc.
  • the present invention further discloses the following method for producing an elastic composite sheet and an apparatus for producing an elastic composite sheet.
  • a joining step of intermittently joining the first sheet and the second sheet in the sheet transport direction along the one direction is provided.
  • a method for producing an elastic composite sheet in which a joining portion is formed not only at a first region but also at a boundary portion between a first region and a second region.
  • a roll having a joining pattern in which convex portions for joining are formed at predetermined intervals in the circumferential direction and a press member arranged to face the outer peripheral surface of the roll are used to join a part of the joining pattern.
  • ⁇ 3> The method for manufacturing an elastic composite sheet according to ⁇ 2>, wherein the joining pattern is a joining pattern in which the joining convex portions are formed at intervals in the width direction.
  • the joining pattern is a joining pattern in which the joining convex portions are formed at intervals in the width direction.
  • ⁇ 4> The method for manufacturing an elastic composite sheet according to ⁇ 3>, wherein the line segment connecting the centroids of adjacent patterns in the sheet transport direction of the joint pattern is inclined with respect to the sheet transport direction.
  • ⁇ 5> The method for manufacturing an elastic composite sheet according to ⁇ 4>, wherein the inclination angle of the line segment changes periodically symmetrically with respect to the sheet transport direction.
  • the width X2 of the second sheet in the width direction orthogonal to the sheet transport direction is formed wider than the width X1 of the first sheet in the width direction, according to any one of ⁇ 1> to ⁇ 8>.
  • Method of manufacturing elastic composite sheet ⁇ 10>
  • the width B of the bonding pattern with respect to the width A of the second region in the width direction is preferably 5% or more, more preferably 20% or more, still more preferably 50% or more, preferably 100% or less, more preferably 100% or less. 95% or less, more preferably 90% or less, preferably 5% or more and 100% or less, more preferably 20% or more and 95% or less, still more preferably 50% or more and 90% or less.
  • a device for manufacturing an elastic composite sheet in which an elastic first sheet and a non-elastic second sheet wider than the first sheet are bonded together.
  • the first sheet is overlapped with a part of the second sheet in a state of being stretched in one direction, and becomes a laminated sheet having a first region having the first sheet and the second sheet and a second region having only the second sheet.
  • it has a joining means for intermittently joining the first sheet and the second sheet in the sheet transport direction along the one direction.
  • the joining means is an apparatus for manufacturing an elastic composite sheet, which forms a joining portion not only at a first region but also at a boundary portion between a first region and a second region.
  • the joining means includes a roll having a joining pattern in which convex portions for joining are formed at predetermined intervals in the circumferential direction, and a press member arranged to face the outer peripheral surface of the roll.
  • Sheet manufacturing equipment. ⁇ 13> The elastic composite sheet manufacturing apparatus according to ⁇ 12>, wherein the joining pattern is formed on the roll as a joining pattern in which the joining convex portions are formed at intervals in the width direction.
  • ⁇ 14> The stretchable composite sheet manufacturing apparatus according to ⁇ 13>, wherein a line segment connecting the centroids of adjacent patterns in the sheet transport direction of the joint pattern is formed so as to be inclined with respect to the sheet transport direction.
  • ⁇ 15> The apparatus for manufacturing an elastic composite sheet according to ⁇ 14>, wherein the joining pattern is formed so that the angle at which the line segment is inclined periodically changes symmetrically with respect to the sheet conveying direction.
  • the width B in the width direction of the joining pattern formed by the joining means in the second region is 5% or more and 100% or less with respect to the width A in the width direction of the second region.
  • a joint is formed not only at the first region but also at the boundary between the first sheet and the second sheet, so that the boundary cannot be rolled up.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Le procédé de fabrication selon la présente invention est un procédé de fabrication d'une feuille composite étirable (1) dans laquelle une première feuille (2) présentant une aptitude à l'étirement et une seconde feuille non étirable (3) ayant une largeur supérieure à celle de la première feuille sont fixées l'une à l'autre, le procédé de fabrication ayant une étape d'assemblage dans laquelle, dans une feuille stratifiée (10) dans laquelle la première feuille (2) est chevauchée par une partie de la seconde feuille (3) dans un état dans lequel la première feuille (2) est étirée dans une direction et qui présente une première région (A1) ayant la première feuille et la seconde feuille et une seconde région (A2) ayant seulement la seconde feuille, la première feuille et la seconde feuille étant assemblées par intermittence dans une direction de transport de feuille (MD) dirigée le long de la première direction ; et dans l'étape d'assemblage, des parties d'assemblage (5) sont également formées sur une partie limite (4) entre la première région et la seconde région, en plus de la première région (A1).
PCT/JP2020/042685 2019-12-13 2020-11-16 Procédé de fabrication et dispositif de fabrication pour feuille composite étirable WO2021117423A1 (fr)

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JP7267498B1 (ja) 2022-07-07 2023-05-01 株式会社瑞光 伸縮積層シートの製造装置及び伸縮積層シートの製造方法

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JP7518055B2 (ja) 2021-11-25 2024-07-17 花王株式会社 複合シートの製造方法

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