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EP4370310A1 - Méthode de production d'un matériau collecté et matériau collecté - Google Patents

Méthode de production d'un matériau collecté et matériau collecté

Info

Publication number
EP4370310A1
EP4370310A1 EP22712574.7A EP22712574A EP4370310A1 EP 4370310 A1 EP4370310 A1 EP 4370310A1 EP 22712574 A EP22712574 A EP 22712574A EP 4370310 A1 EP4370310 A1 EP 4370310A1
Authority
EP
European Patent Office
Prior art keywords
thread
material web
web sections
tool
sealing surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22712574.7A
Other languages
German (de)
English (en)
Inventor
Raquel ROUSSEL-GARCIA
Robin Alexander Bode
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Herrmann Ultraschalltechnik GmbH and Co KG
Original Assignee
Herrmann Ultraschalltechnik GmbH and Co KG
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 claimed from DE102021118030.9A external-priority patent/DE102021118030A1/de
Priority claimed from DE102021118046.5A external-priority patent/DE102021118046A1/de
Application filed by Herrmann Ultraschalltechnik GmbH and Co KG filed Critical Herrmann Ultraschalltechnik GmbH and Co KG
Publication of EP4370310A1 publication Critical patent/EP4370310A1/fr
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/087—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using both a rotary sonotrode and a rotary anvil
    • 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
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons
    • 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
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/006—Preventing damaging, e.g. of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/344—Stretching or tensioning the joint area during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B29C66/81435—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned comprising several parallel ridges, e.g. for crimping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0046—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/4871—Underwear
    • B29L2031/4878—Diapers, napkins

Definitions

  • the present invention relates to a method for producing a gathered or gatherable material. Furthermore, the present invention relates to a corresponding gathered material.
  • the gathered or gatherable material consists of at least two material web sections and at least one thread that is positioned between the material web sections.
  • the two material web sections are connected to one another at at least two connecting surfaces.
  • the thread is arranged between the material web sections and between the two connecting surfaces, so that the thread is fixed between the material web sections in such a way that there is a positive connection between the thread and the material web sections in a first and a second direction, which is aligned perpendicularly to the first direction .
  • the two material web sections can be realized by two material webs, which are connected via the connec tion surfaces. However, it is also possible to fold a material web in such a way that a first material web section of the material web comes to lie opposite a second material web section of the same material web and the thread is arranged between the first and the second material web section.
  • a tool with a sealing surface and a counter-tool with a counter-sealing surface are provided, the tool and the counter-tool being arranged relative to one another in a processing position in such a way that, to produce the gathered or gatherable material, the material web sections and the thread are fed through a be passed through the gap formed by the sealing surface and the counter-sealing surface in a feed direction before.
  • the tool and/or the counter-tool has at least one groove for at least partially receiving the at least one thread, the groove being oriented in the forward feed direction and dividing the sealing surface or the counter-sealing surface into partial sealing surfaces.
  • the groove has a groove base and two side walls adjoining the groove base, the side walls connecting the groove base to the partial seal surfaces.
  • Corresponding methods for producing a gathered or gatherable material with corre sponding tools are known from the prior art.
  • the tool can be, for example, a sonotrode of an ultrasonic processing device or a roller that is thermally heated.
  • the description is based on an ultrasonic machining method. With the method according to the invention, however, other tools can also be operated without ultrasound.
  • the tool In order to process a material with ultrasound, the tool, e.g. the sonotrode of the device, is made to oscillate ultrasonically. This leads to a localized heating of the material that is arranged in the gap between the sealing surface and the counter-sealing surface. The localized heating in turn leads to the different layers of material that are arranged in the gap fusing with one another and thus entering into a firm connection that cannot be detached without being destroyed.
  • a thread is arranged between the two material web sections, which is significantly more elastic than the material web sections themselves.
  • the thread is tensioned and, due to the merging of the material web sections, is clamped between them at least in two spatial directions.
  • the ability of a material to be gathered is therefore largely determined by the friction properties between the thread and material web sections, which in turn are related to the properties of the materials used per se, but also to the tension of the thread during the processing process.
  • the object of the present invention is therefore to provide a method for producing a gathered or gatherable material, with which a material with reproducible and reliable gathering is produced.
  • the object of the present invention is to provide a gatherable or gathered material which can be produced easily and exhibits reliable gathering.
  • this object is achieved by a method for preparing a gathered or gatherable material of the type mentioned at the outset, the method having the following steps: a) providing at least two material web sections and at least one thread which is arranged between the material web sections, b) Providing a processing device with a tool with a sealing surface and a counter-tool with a counter-sealing surface, wherein the tool and the counter-tool are arranged relative to one another in such a way that a gap between the sealing surface and the counter-sealing surface, the tool and/or the counter-tool having at least one groove for at least partially receiving the at least one thread, c) passing the at least two material web sections and the at least one thread through the gap between the sealing surface of the tool and the counter sealing surface in the feed direction, with the thread being guided through the at least one groove of the sealing surface or the counter tool, so that the two material web sections are welded to one another at at least two connecting surfaces, with the thread being arranged between the two connecting surfaces in such
  • the permanent connection of the thread to the material web sections can be effected either by a material connection or by embedding at least one section of the thread or at least one filament of the thread in the material of the material web sections.
  • the material of the material web sections can be melted during welding, a thread section or a thread filament can be added to the melt and the melt can then be solidified again.
  • the fixed connection is therefore non-detachable or detachable only if the material from which the webs of material are made is heated again. A relative movement between the thread and material webs in the direction of the thread is prevented by the fixed connection.
  • the tool is, for example, during step c. subjected to an ultrasonic vibration or thermally heated and ge pressed onto the material to be processed, so that the material web sections and the outer section of the thread merge with one another, ie are firmly connected to one another.
  • This connection can be a material connection.
  • cohesiveness means that the materials to be processed enter into a connection with one another at least in places at the molecular level, which cannot be dissolved without being destroyed. It is essential that the thread in the permanently connected areas can only be moved together with the material web sections. If the thread is in c. tensioned and relaxed after processing, the material web sections gather together because the thread contracts again.
  • connection is made such that in a sectional view perpendicular to the direction of the thread, the thread is only partially connected to the material web sections in the circumferential direction, with the connection preferably being made in such a way that in a sectional view perpendicular to the direction of the thread, the thread is connected to two of each other in the circumferential direction separate sections is connected to the material web sections.
  • the thread is thus not continuously connected to the material web sections in the circumferential direction. It is also not necessary to continuously connect the thread in the longitudinal direction to the material track sections. Rather, in a preferred embodiment, the connection is also made only in sections in the longitudinal direction, i.e. in the direction of the thread.
  • the thread When loosening a gathered material using the method according to the invention, the thread is no longer arranged so that it can move freely between the material web sections, but is also fixed to the material web sections in the feed direction. In this way, the position of the thread in the material web sections can be determined particularly precisely. Due to the different elasticity of the connected materials and the tension of the thread during welding, the material still gathers.
  • the products produced with this method have a high accuracy and reproducible quality, since the threads are reliably arranged at a fixed position between the material web sections.
  • the grooves for receiving the at least one thread and the cross section of the thread are selected such that the cross section of the thread changes during step c. adapts to the shape of the groove. So the thread does not keep its usually circular cross-section, but adapts to the shape of the grooves.
  • the cross section of the thread is chosen such that the cross section of the thread is greater than a depth of the groove when the thread is in a tensioned state.
  • the thread protrudes beyond the groove and is thus processed by the tool at least in an outer section in such a way that a fusion with the material web sections occurs.
  • the tool in step c. stimulated with an ultrasonic vibration. The tool is therefore a sonotrode that transmits an ultrasonic vibration to the material.
  • step c. heated so that the material web sections melt in the areas that come into contact with the sealing surface of the tool and are connected to each other at these connecting surfaces.
  • the groove divides the sealing surface or counter-sealing surface into partial sealing surfaces, with the groove having a groove base and two side walls adjoining the groove base, and with the side walls connecting the groove base with the partial sealing surfaces, with at least one of the partial sealing surfaces in a sectional view perpendicular to the feed direction has at least one flank sloping down to the bottom of the groove, the flank being preferably convexly curved with a radius RF in a sectional view perpendicular to the feed direction.
  • transition between the partial sealing surfaces and the groove is preferably designed in such a way that there are no longer any sharp edges that could make it difficult to change the threads between the grooves or damage the threads.
  • the inventive design of the partial sealing surfaces between the grooves reduces damage to the thread and thus the likelihood of a thread tearing off, on the one hand, and makes it possible for threads to be positioned more easily in the individual grooves, on the other hand. Since the threads slide more easily into the grooves over the flank, it is less common for a thread to be positioned in the area of the partial sealing surfaces, and the risk of the threads becoming welded together is reduced. On the contrary, the security is increased that the thread is welded to the material web sections at the desired point.
  • the radius RF is between 0.01 mm and 0.5 mm and particularly preferably between 0.05 mm and 0.2 mm.
  • flank as a convex curvature
  • the configuration of the flank as a convex curvature offers the advantage that there are no longer any edges between the partial sealing surface and the side wall of the groove, but rather the partial sealing surface merges into the side wall of the groove in a uniform curvature.
  • the thread cannot jam at a corner and thus be welded in the wrong position.
  • the groove base is concavely curved, with the concavely curved groove base preferably directly adjoining the convexly curved flank of the partial sealing surface.
  • convex is understood to mean that a straight line between two freely selectable points of the convexly curved surface runs completely within the tool body or counter-tool body.
  • concave on the other hand, means that a straight line between two freely selectable points on the surface runs completely outside the body.
  • the concave curvature of the groove base and in particular the direct transition from the concavely curved groove base into the convexly curved flank offers the advantage that the groove of the device according to the invention no longer has any corners or edges in which fibers of the material to be processed could collect or adhere where the thread could get stuck. This prevents the grooves from becoming clogged, resulting in insufficient thread guidance, or thread welding at an unwanted point.
  • the groove base is curved concavely in a sectional view perpendicular to the feed direction with a radius R G , with preferably 5 RF > R G > 0.5 RF and particularly preferably 2.5RF > R G > 0.8RF.
  • the selection of the radius of curvature R G of the groove base in relation to the radius of curvature R F of the flank is made in such a way that the partial sealing surfaces have a sufficient width, ie do not taper to a point. This reduces wear on the partial sealing surfaces.
  • the at least one groove is arranged on the sealing surface of the tool.
  • the counter-tool is cylindrical and can be rotated about a first cylinder axis, the counter-tool having a lateral surface on which the counter-sealing surface is arranged, the first cylinder axis being oriented in such a way that the feed direction runs tangentially to the lateral surface.
  • the sealing surface of the tool is essentially planar in the feed direction. This allows the force applied by the tool to the material system to be processed to be evenly distributed.
  • the sealing surface has a rounded edge in a sectional view parallel to the feed direction, at least in a feed direction from which the material is fed, so that the material to be processed falls into the gap on the tool running, is also not damaged by sharp edges of the tool. This minimizes the tearing of threads, which also results in fewer fiber deposits in the grooves.
  • the groove extends completely over an extension of the sealing surface and/or the counter-sealing surface in the feed direction. This is necessary because the thread is guided particularly stably over the entire processing width of the device according to the invention and the thread is not processed unintentionally by the processing device at any point.
  • the tool is cylindrical, the tool being rotatable about a second cylinder axis and having a lateral surface on which the sealing surface is arranged, the at least one groove preferably encircling the lateral surface of the tool in a circle.
  • a cylindrical tool offers the advantage that material damage is prevented and the material can roll over the tool.
  • the sealing surface and/or the counter-sealing surface has a plurality of grooves oriented in the feed direction for at least partially receiving the at least one thread, with the grooves preferably having a spacing of between 0.1 mm and 10 mm and particularly preferably between 0.4 and have 2.5 mm.
  • the distance between two grooves is defined from the center of one groove to the center of the immediately adjacent groove.
  • several grooves are combined in packs of grooves, with the grooves of a pack of grooves preferably having a spacing of between 0.1 and 1 mm, with the packs of grooves preferably having a spacing of between 5 and 300 mm from one another.
  • the distance between the packs of grooves is defined from the center of one pack of grooves to the center of the adjacent pack of grooves.
  • the at least one groove has a depth of between 0.05 mm and 0.8 mm. At this depth, threads can be guided with sufficient accuracy and at the same time the grooves are comparatively easy to produce from a manufacturing point of view. Deeper grooves could lead to instability of the tool, especially if the distance between the grooves is small, so that only narrow partial sealing surfaces remain, but these are located comparatively far away from the bottom of the groove. If both the groove base and the flank are curved, the depth of the groove is preferably determined from the sum of the radius of curvature RF of the flank and the radius of curvature RG of the groove base.
  • the partial sealing surface presents a convex curvature, which preferably has a radius of curvature that corresponds to the radius of curvature of the flanks.
  • the partial sealing surfaces therefore no longer have a flat surface, but are curved at every point. In this way, only a linear welding of the material webs takes place in the feed direction. Undesirable processing of the thread is hereby avoided in a particularly effective manner.
  • a gatherable or shirred material consisting of at least two material web sections and at least one thread that is arranged between the material web sections, the two material web sections being welded to one another at at least two connecting surfaces, wherein the thread is arranged between the two connecting surfaces in such a way that there is a positive connection between the thread and the material web sections in a first and a second direction, with the two directions being aligned perpendicularly to one another, characterized in that the thread is fixed to the both material web sections is connected.
  • the gatherable or gathered material is preferably produced by means of the method described.
  • FIG. 1 shows a sectional view of a detail of a tool which is operated using the method according to the invention.
  • FIG. 2a schematically shows the arrangement of the thread between the webs of material after welding has taken place using methods known from the prior art.
  • FIG. 2b schematically shows the arrangement of the thread according to an embodiment of the method according to the invention.
  • the grooves 3 for receiving the thread 13 are arranged in the sonotrode sealing surface 2 of a sonotrode 1.
  • FIG. The grooves 3 run in the feed direction, which in the sectional view shown in FIG. 1 extends into the plane of the page.
  • the grooves 3 divide the sonotro den sealing surface 2 into several partial sealing surfaces 7.
  • the grooves 3 have a groove base 4 and two side walls 5 , 6 adjoining the groove base, the side walls 5 , 6 connecting the groove base 4 to the partial sealing surfaces 7 .
  • the partial sealing surfaces 7 each have two flanks 8 falling perpendicularly to the feed direction towards the bottom 4 of the groove.
  • the radius Rider curved partial sealing surface 7 corresponds to the radius R G of the concavely curved groove base 4 and is 0.1 mm.
  • the grooves also have a width B of 0.22 mm, the width being measured between the two transition points of the concavely curved groove base 4 and the convexly curved flank 8 .
  • the grooves 3 have a depth T of 0.21 mm.
  • the depth T of the grooves 3 is defined between the deepest point of the groove base 4 and the highest point of the partial sealing surface 7.
  • the distance A between two grooves is 0.42 mm, with the distance A being measured at the deepest point of the groove base 4 in each case.
  • two material webs 11, 12 are arranged between the sonotrode sealing surface 2 of the sonotrode 1 and the counter-sealing surface of a counter-tool (not shown), between which a thread 13 is arranged.
  • the thread 13 is guided in such a way that it runs inside the grooves 3 .
  • Ultrasonic processing of the material web sections 11, 12 occurs only in the area of the partial sealing surfaces 7.
  • a diameter of the thread 13 in a state in which the thread is stretched is selected such that it is smaller than a depth of the groove 3 .
  • the thread 13 is not processed by the sonotrode 1.
  • FIG. 2a The result of such a method using devices known from the prior art, ie using devices whose grooves have sharp edges, is shown in FIG. 2a.
  • the thread 13 is in a cavity between the material web sections 11, 12 of the Material 10 clamped, but can move in the feed direction relative to the material web sections 11, 12 move.
  • the lower material web section 12 has the shape of the grooves, which can be arranged on the sonotrode or the counter-tool or on both.
  • the cross section of the thread 13 is selected in such a way that it is greater than a depth of the groove 3 even in the tensioned state.
  • the result of the method according to the invention is shown in FIG. 2b.
  • the thread 13 is welded in the area of the partial sealing surface 7.
  • the thread 13 is also attached to the material web sections 11, 12 and can no longer be moved in the feed direction.
  • the originally circular cross section of the thread 13 has also adapted to the shape of the groove 3 .
  • the distance between the at least two connecting surfaces during the welding can be selected such that this distance either i) corresponds to the diameter of the thread 13 in a relaxed state or ii) greater than the diameter of the thread 13 in a relaxed state is. Due to the fixed connection according to the invention, it is therefore no longer necessary to select a large diameter of the thread 13 in the relaxed state in order to achieve friction between material web sections 11 and the thread 13 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

L'invention concerne une méthode de production d'un matériau collecté ou d'un matériau (10) qui peut être collecté, comprenant les étapes consistant à : • a. fournir deux sections de bande de matériau (11, 12) et un fil (13) qui est disposé entre les sections de bande de matériau (11, 12), • b. fournir un dispositif de traitement comprenant un outil (1) avec une surface d'étanchéité (2) et un contre-outil doté d'une surface de contre-étanchéité, l'outil (1) et le contre-outil étant disposés l'un par rapport à l'autre de telle sorte qu'un espace est formé entre la surface d'étanchéité (2) et la surface de contre-étanchéité, l'outil (1) et/ou le contre-outil présentant au moins une rainure (3) destinée à recevoir le fil (13), et • c. faire passer les deuxièmes sections de bande de matériau (11, 12) et le fil (13) à travers l'espace entre la surface d'étanchéité (2) de l'outil (1) et la contre-surface dans une direction d'alimentation, le fil (13) étant guidé à travers la rainure (3) de la surface d'étanchéité (2) et/ou le contre-outil de telle sorte que les deux sections de bande de matériau (11, 12) sont soudées ensemble sur deux surfaces de connexion. Le fil (13) est disposé entre les deux surfaces de connexion de telle sorte qu'une connexion par complémentarité de forme est réalisée entre le fil (13) et les sections de bande de matériau (11, 12) dans une première direction et dans une seconde direction perpendiculaire à celle-ci. La section transversale du fil (13) par rapport à une section transversale de la rainure (3) pendant le traitement est sélectionnée de telle sorte que, lors de l'étape c, une section externe du fil (13) est également soudée aux sections de bande de matériau (11, 12) de telle sorte que la section externe du fil (13) est connectée de manière rigide aux deux sections de bande de matériau (11, 12).
EP22712574.7A 2021-07-13 2022-03-10 Méthode de production d'un matériau collecté et matériau collecté Pending EP4370310A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021118030.9A DE102021118030A1 (de) 2021-07-13 2021-07-13 Verfahren zur Herstellung eines gerafften Materials
DE102021118046.5A DE102021118046A1 (de) 2021-07-13 2021-07-13 Vorrichtung und Verfahren zur Herstellung eines gerafften Materials
PCT/EP2022/056234 WO2023285004A1 (fr) 2021-07-13 2022-03-10 Méthode de production d'un matériau collecté et matériau collecté

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EP4370310A1 true EP4370310A1 (fr) 2024-05-22

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EP22712574.7A Pending EP4370310A1 (fr) 2021-07-13 2022-03-10 Méthode de production d'un matériau collecté et matériau collecté
EP22747026.7A Pending EP4370311A1 (fr) 2021-07-13 2022-07-12 Dispositif et procédé de fabrication d'un matériau froncé

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EP22747026.7A Pending EP4370311A1 (fr) 2021-07-13 2022-07-12 Dispositif et procédé de fabrication d'un matériau froncé

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US (2) US20240300187A1 (fr)
EP (2) EP4370310A1 (fr)
JP (2) JP2024526717A (fr)
WO (2) WO2023285004A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2008041639A1 (fr) * 2006-09-29 2008-04-10 Daio Paper Corporation Couche en papier, procédé destiné à former une partie extensible d'un article absorbant, et dispositif destiné à former la partie extensible
EP2105115B1 (fr) * 2006-12-28 2018-03-07 Daio Paper Corporation Couche jetable
US8647319B2 (en) * 2007-11-19 2014-02-11 Hans Een Absorbent article comprising one or several patterns
ITUB20150513A1 (it) * 2015-05-12 2015-08-12 Fameccanica Data Spa Procedimento ed apparecchiatura per la produzione di prodotti sanitari assorbenti e prodotto sanitario assorbente
JP6625126B2 (ja) * 2015-06-22 2019-12-25 株式会社瑞光 複合伸縮部材、着用物品および着用物品の製造方法
JP6926800B2 (ja) * 2017-08-07 2021-08-25 王子ホールディングス株式会社 複合伸縮部材及びその製造装置
US11173072B2 (en) * 2019-09-05 2021-11-16 Curt G. Joa, Inc. Curved elastic with entrapment
DE102019124006A1 (de) * 2019-09-06 2021-03-11 Herrmann Ultraschalltechnik Gmbh & Co. Kg Vorrichtung und Verfahren zur Herstellung eines gerafften oder raffbaren Materials

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US20240300187A1 (en) 2024-09-12
WO2023285450A1 (fr) 2023-01-19
JP2024525765A (ja) 2024-07-12
EP4370311A1 (fr) 2024-05-22
JP2024526717A (ja) 2024-07-19
WO2023285004A1 (fr) 2023-01-19
US20240316875A1 (en) 2024-09-26

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