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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
  • B29C43/28—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0046—Fasteners made integrally of plastics
  • A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0046—Fasteners made integrally of plastics
  • A44B18/0061—Male or hook elements
• • 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
  • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
  • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
  • B29C41/28—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length by depositing flowable material on an endless belt
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
  • B29C43/222—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length characterised by the shape of the surface
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
  • B29C43/30—Making multilayered or multicoloured articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/44—Compression means for making articles of indefinite length
  • B29C43/48—Endless belts
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/001—Combinations of extrusion moulding with other shaping operations
  • B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/001—Combinations of extrusion moulding with other shaping operations
  • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/07—Flat, e.g. panels
  • B29C48/08—Flat, e.g. panels flexible, e.g. films
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/44—Compression means for making articles of indefinite length
  • B29C43/46—Rollers
  • B29C2043/461—Rollers the rollers having specific surface features
  • B29C2043/464—Rollers the rollers having specific surface features having projections or knives, e.g. for cutting-out or for forming local depressions
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/44—Compression means for making articles of indefinite length
  • B29C43/46—Rollers
  • B29C2043/461—Rollers the rollers having specific surface features
  • B29C2043/465—Rollers the rollers having specific surface features having one or more cavities, e.g. for forming distinct products
• • 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
  • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
  • B29C43/32—Component parts, details or accessories; Auxiliary operations
  • B29C43/44—Compression means for making articles of indefinite length
  • B29C43/48—Endless belts
  • B29C2043/486—Endless belts cooperating with rollers or drums
• • 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
  • B29C2791/00—Shaping characteristics in general
  • B29C2791/002—Making articles of definite length, i.e. discrete articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/0009—Cutting out
• • 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
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
  • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/30—Extrusion nozzles or dies
  • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/30—Extrusion nozzles or dies
  • B29C48/35—Extrusion nozzles or dies with rollers
• • 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
  • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
  • B29C48/25—Component parts, details or accessories; Auxiliary operations
  • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
  • B29C48/911—Cooling
  • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
  • B29C48/9145—Endless cooling belts
• • 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
  • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
  • B29K2023/10—Polymers of propylene
  • B29K2023/12—PP, i.e. polypropylene
• • 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
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
  • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
  • B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
• • 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
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
  • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
  • B29K2105/128—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles in the form of a mat
• • 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
  • B29L2031/727—Fastening elements
  • B29L2031/729—Hook and loop-type fasteners

Definitions

• the present invention relates to the field of retaining devices, typically of the self-gripping type.
• the present invention relates to a method of manufacturing a retaining device, in which:
• the application of the support on the base is for example such that the length of the development of the base and the length of the development of the support, in the zone of application of the support on the base, have a difference of less than 10 %, in particular a continuous contact in the longitudinal direction and/or in a transverse direction is made between all or part of the lower surface of the base and the support.
• the product is unmolded, comprising a support and a base secured non-uniformly to the support,
• all or part of a periphery of segments of the base is calendered so as to secure it or confirm its attachment to the base. support and/or for example in order to reduce its thickness.
• the reduced thickness of all or part of a periphery of segments of the base so as to secure it or confirm its attachment to the support may thus not be directly resulting from the formation of the base.
• the preforms are calendered so as to modify the geometry of all or part of the preforms to obtain retaining elements, in particular prior to the cutting step.
• the base is secured to the support in particular by partial penetration of the support into the base, by application of the support to the base downstream of the formation of the base, prior to the joining of the lower face and the base .
• the base and the support are made of different materials, in particular materials of different natures.
• a support having a lower face and an upper face, the support forming a strip extending in a longitudinal direction
• the length of the base development and the length of the support development, in the zone of application of the support on the base present a difference of less than 10%, in particular continuous contact in the direction longitudinal and/or in the transverse direction is made between all or part of the lower surface of the base and the support
• the invention also relates to a device comprising:
• a base extending in the longitudinal direction between a first end and a second end, the base having a lower face facing the upper face of the support, and an upper face, the base having a constant thickness between its lower face and its upper face, in particular over at least 30% of the surface of the base,
• a base (12) extending in the longitudinal direction (MD) between a first end and a second end, the base (12) having a lower face (12B) facing the upper face (22A) of the support ( 22), and an upper face (12A), the base (12) having a constant thickness between its lower face (12B) and its upper face (12A), in particular over at least 30% of the surface of the base,
• the base (12) is secured to the support (22) in a non-uniform manner, and comprises at least one segment secured to the support (S), and at least one portion not secured to the support (P), the support comprises fibers and/or filaments and/or threads on its upper face, for example the support comprises a sheet of material non-woven, the support is calendered by zone prior to its application on the base, the at least one calendered zone of the support, in particular the calendered zones of the support having a thickness lower by at least 10%, preferably by at least 30%, at least one non-calendered zone, typically at least one zone extending continuously in the longitudinal direction, in particular in the non-calendered zones and a surface area greater than 5 mm 2 , in particular at least 15 mm 2 , determining when applying the support at least one zone, in particular zones of greater thickness put under pressure on the base which is secured to the base, and at least one calendered
• the lower face of the support defines
• first set of zones extends along a first plane PI and the second set of zones extends along a second plane P2 distinct from the first plane PI, the first plane PI being closer to the lower face of the base than the second plane P2.
• the first set of zones and the second set of zones each typically comprise one or more zones.
• the base comprises a periphery portion forming an external periphery of the base extending over a maximum distance of 3mm, in particular 2mm, in particular 1mm, in particular 0.5mm, in which at least 3%, in particular at least 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35% or 45% of the surface of the periphery portion is not secured to the support and in particular has a thickness substantially equal to the constant thickness of the base and/or the interior portion of the base.
• the base comprises a periphery portion forming an external periphery of the base extending over a maximum distance of 3mm, in particular 2mm, in particular 1mm, in particular 0.5mm, in which at least 3%, in particular at least 5%, 7%, 10%, 15%, 20%, 25%, 30%, 35% 45%, 50% or 60% of the surface of the periphery portion is secured to the support and has a thickness less than the thickness of a central portion of the base.
• the reduced thickness of all or part of a periphery of the base is typically not directly resulting from the formation of the base.
• the base comprises a periphery portion forming an external periphery of the base extending over a maximum distance of 3mm, in particular 2mm, in particular 1mm, in particular 0.5mm, in which at least 50%, in particular at least 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or 100% of the surface of the periphery portion is not secured to the support and has a thickness less than the thickness of an interior portion of the base, in particular the periphery portion not secured to the support has a thickness substantially equal to the constant thickness of the base and/or the interior portion of the base.
• the base comprises a periphery portion forming an external periphery of the base extending over a maximum distance of 3mm, in particular 2mm, in particular 1mm, in particular 0.5mm, in which at least 50%, in particular at least 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90% or 95% of the surface of the periphery portion is secured to the support and all or part of the periphery portion secured to the support has a thickness less than the thickness of a central portion of the base. Alternatively, 100% of the surface of the periphery portion is secured to the support.
• the reduced thickness of all or part of a periphery of the base is typically not directly resulting from the formation of the base.
• the surface of the base not fixed to the support is a maximum of 25%, 22%, 20%, 18%, or even 15%, of the total surface of the base.
• the support comprises fibers and/or filaments and/or threads on its upper face, for example the support comprises a sheet of non-woven material.
• the support comprises calendered zones and non-calendered zones, the calendered zones of the support having a thickness lower by at least 10%, preferably at least 30%, than the non-calendered zones and a surface greater than 5 mm 2 , in particular at least 15 mm 2 , so that an upper face of the non-calendered zones of the support extends along a non-calendered plane PI' and an upper face of the calendered zones of the support s 'extends along a calendered plane P2' distinct from the non-calendered plane PI', the non-calendered zones of the support being secured to the base and the calendered zones of the support not being secured to the base.
• the support may typically comprise one or more calendered zones and one or more non-calendered zones.
• the base is secured to the support by partial encapsulation of the support in the base.
• the base and the support are made of different materials, in particular materials of different natures.
• the base has a variable width depending on the transverse direction.
• the support comprises at least one notch or cutout formed in a portion of the support distant from the edges of the support, the at least one notch or cutout being able in particular to be formed in the support in periphery of the edge of the base, in particular more or less 3mm from the edge of the base, in particular more or less 2mm from the edge of the base.
• the invention further relates to an absorbent article, for example of the baby diaper type or an adult incontinence diaper, which comprises
• Figure 1 shows an example of a device according to one aspect of the invention.
• Figure 2 represents an example of equipment for producing such a device.
• FIG. 6 Figure 6 schematically illustrates a cutting step.
• Figure 7 shows another example of a device according to one aspect of the invention.
• FIG. 8 shows a detailed view of part of an example of equipment for implementing the invention.
• Figure 9 represents another example of equipment for implementing the invention.
• Figure 10 schematically illustrates an embodiment of a cutting and removal step.
• FIG. 11 Figure 11 schematically illustrates another embodiment of a cutting and removal step.
• Figure 12 schematically illustrates another embodiment of a cutting and removal step.
• Figure 13 schematically illustrates an example of a device.
• Figure 14 schematically illustrates another example of a device.
• Figure 15 schematically illustrates another example of a device.
• FIG. 16 Figure 16 schematically illustrates another example of a device.
• FIG. 17 Figure 17 schematically illustrates another example of a device.
• Figure 18 shows an example of a roller.
• Figure 19 shows another example of a device according to one aspect of the invention.
• Figure 1 shows an example of a device according to one aspect of the invention.
• Figure 1 schematically represents a retaining device 10 comprising a base 12 which has an upper face 12A and a lower face 12B and a plurality of retaining elements 16 extending from the upper face 12A of the base 12.
• continuous base we mean that the base 12 is understood to be continuous in the machine direction MD. In some cases, a continuous base may lack through openings or recesses in areas where there are no retaining elements.
• the base 12 typically has a constant width, the width being measured in the transverse direction CD.
• the base 12 could have a variable width or could for example have a serrated shape.
• the base typically has a density of retaining elements of between 50 and 3000 hooks/cm 2 , or typically between 100 and 800 hooks/cm 2 , or between 50 and 450 hooks/cm 2 , in particular between 100 and 400 hooks/ cm2 , more particularly between 150 and 350 hooks/ cm2 , in certain cases between 230 and 290 hooks/ cm2 .
• a base and retaining elements which retain a residual deformation or remanence after elongation and relaxation (residual deformation also called “permanent set” or “SET") greater than or equal to 20%, preferably greater or equal to 30%, of its initial dimension (before elongation) for an elongation of 100% of its initial dimension, at room temperature (23°C - degree Celsius).
• the base 12 and the retaining elements 16 and/or preform can be formed based on an elastomeric thermoplastic material and/or based on elastomer.
• based on we mean that the majority material in the given composition, for example at least 30%, or even at least 50% of said material.
• the retaining device 10 can be manufactured for example by means of equipment 100 as shown in Figure 2 as well as in Figure 3 which presents a detailed view.
• the apparatus 100 makes it possible to manufacture a ribbon 26 for a retaining device, the ribbon 26 can then be cut or subdivided into a plurality of retaining devices 10.
• the ribbon 26 comprises the base 12 which is here continuous, and a plurality of retaining elements 16.
• the retaining elements 16 are hooks, each hook comprising a rod 18 surmounted by a head 19.
• the apparatus 100 as shown comprises a molding strip 102 positioned on rotational drive means 104 comprising here two rollers 104A, 104B, a material distribution means 106, for example an injector, adapted to produce an injection of molding material, for example thermoplastic.
• a material distribution means 106 for example an injector, adapted to produce an injection of molding material, for example thermoplastic.
• machine direction MD is meant the direction of movement of the molding strip 102 in the apparatus 100 during the manufacture of the retaining device, in accordance with the English acronym for “Machine Direction”, and by transverse direction CD, in accordance with to the English acronym for “Cross Direction”, the direction perpendicular to the MD machine direction.
• the machine direction MD corresponds to the longitudinal direction when the retaining device 10 is in the equipment.
• the product is thus formed defines a strip or ribbon extending in the machine direction MD, and typically has a fixed width in the transverse direction CD.
• the illustrated example comprising two rollers 104A, 104B is not limiting, the number and arrangement of the roller(s) 104 can vary in particular in order to to adapt to the length of the molding strip 102 and to the different positions of the equipment.
• only one of the two rollers can be rotated by motorized means, for example the roller 104A, the other roller 104B being free, that is to say without motorized means, and driven in rotation via the molding strip , itself driven by the roller 104A.
• the molding strip 102 as presented comprises an internal face 102A and an external face 102B, the internal face 102A being in contact with the rotation drive means 104.
• the material distribution means 106 is arranged so as to inject molding material onto the external face 102B of the molding strip 102.
• the material distribution means 106 is arranged facing the molding strip 102, spaced from the molding strip 102 so as to define an air gap “e” indicated in Figure 2.
• the reference At the limit of the material injected on the external face 102B of the molding strip 102, corresponding to the rear front of the material injected on the molding strip 102 relative to the direction of movement of the molding strip 102.
• the cavities 102C are each typically formed so as to define a rod 102C1 extending from the external face 102B towards the internal face 102A of the molding strip 102 and a head 102C2 extending between the rod 102C1 and the face internal 102A of the molding strip 102.
• the molding strip 102 is typically continuous, and typically has a perimeter of between 200 mm and 3000 mm, or typically between 400 mm and 2000 mm.
• the successive cavities 102C are typically spaced regularly according to a transverse interval.
• the successive cavities 102C are typically spaced regularly according to a machine interval.
• said lines are spaced regularly according to a first transverse interval and according to a second transverse interval, the second transverse interval not being an integer multiple of the first transverse interval and the first transverse interval being less than the second transverse interval, and/or said columns are spaced regularly according to a first machine interval and according to a second machine interval, the second machine interval not being an integer multiple of the first machine interval and the first machine interval being less than the second machine interval.
• the retaining elements 16 formed using these cavities 102C are arranged in a column and row arrangement, respectively in a primary direction and a secondary direction, typically corresponding to the machine direction MD and the transverse direction CD.
• the portions of the cavities 102C forming the heads 102C2 typically extend radially or transversely relative to an axis perpendicular to the external face 102B of the molding strip 102, and can have rotational symmetry around this axis perpendicular to the external face 102B of the molding strip 102.
• the portions of the cavities 102C forming the heads 102C2 typically have a substantially frustoconical or hexahedral shape.
• the portions of the cavities 102C forming the heads 102C2 can be linear or curved, for example to form portions curved towards the internal face 102A or towards the external face 102B of the molding strip 102 extending from the portions of the cavities 102C forming the rods 102C1.
• the molding strip may also have a shape such as those described in patent applications WO0213647 A2 and/or WO00050208 A2.
• the portions of the cavities 102C forming the heads 102C2 may have a constant or variable thickness.
• the portions of the cavities 102C forming the heads 102C2 extend radially around the portions of the cavities 102C forming the rods 102C1, and have a general disc shape.
• the molding strip 102 may have on its internal face 102A or on its external face 102B a particular texturing such as grooves, network of grooves or passage network forming a vent or pins, or be substantially smooth.
• the molding strip 102 can be formed by a superposition of several strips, and is therefore not necessarily in one piece or in one material.
• the molding strip 102 may be composed of one or more materials or composites, typically metallic of the Ni, Cu, Stainless steel type, or any other suitable material.
• the material distribution means 106 is typically arranged so as to inject molding material into the molding strip 102 in a section of the molding strip 102 where the latter bears against a roll of drive, in this case the drive roller 104A in the example shown in Figure 2. The drive roller then forms a bottom for the cavities 102C.
• the material distribution means 106 can then comprise a base arranged the other side of the molding strip 102, so that the internal face 102A of the molding strip 102 rests against the base when the injection of material is carried out, the base then forming a bottom for the cavities 102C of the molding strip 102.
• the injection of material against the molding strip 102 and into the cavities 102C makes it possible to obtain a base 12 having a constant or substantially constant thickness, in particular over at least 30% of the surface of the base 12, or over at least 40%, 50%, 60%, 70% or 80% of the base surface.
• the base 12 has a thickness of between 10 and 250 micrometers, in particular between 10 and 120 micrometers, or for example between 25 and 80 micrometers.
• the injection of material against the molding strip 102 is a continuous process of depositing material making it possible to produce a continuous base 12 in the machine direction MD and successive filling of the molding cavities 102C in the machine direction MD.
• constant thickness of the base 12 we expect a thickness of the base 12 which comprises flat or substantially flat lower and upper faces, or even faces which have a particular texturing such as grooves, network of grooves or passage network forming vent or nubs, or be noticeably smooth.
• the base 12 thus typically has a constant thickness over at least 30% of its surface, the surface of the base 12 being measured in the plane defined by the machine direction MD and the transverse direction CD.
• the base 12 thus typically has a constant thickness over at least 40%, 50%, 60%, 70%, 80% of its surface.
• the use of a molding strip 102 is particularly interesting in terms of modularity.
• the molding strip can in fact be easily removed and replaced from the drive means, unlike a massive roller for which the disassembly and reassembly operations are particularly complex to carry out.
• Such an advantage is particularly observed when the two rollers 104A, 104B are fixed to a frame on one and the same side, leaving the end of the other side free to introduce/remove the molding strip.
• a means for guiding the molding strip can also be used to facilitate its insertion and/or removal.
• the cavities 102C in the molding strip 102 can be produced by a chemical etching process or by use of a laser in the places where it is desired to form retaining elements 16. It is also possible to envisage producing the molding strip 102 with cavities 102C distributed uniformly over the entire molding strip 102 and then blocking the cavities 102C in the places where it is desired to form zones 20 devoid of retaining elements 16, so as to form elements retainer 16 in a uniform or localized manner.
• the cavities 102C of the molding strip 102 pass through.
• the equipment can then include an element, such as a doctor blade 110, positioned so as to scrape the internal face 102A of the molding strip 102 to remove excess molding material if necessary.
• injection is meant the continuous action of shaping a molding material in a cavity by melting, for example, distribution, supply, molding, injection, extrusion.
• the apparatus presented and the associated method also present means and a step for associating a support 22, typically made of non-woven (or woven) material, to the base 12.
• a support 22 on a base 12 comprising retaining elements 16 is typically carried out by means of an adhesive, or via fusion of the base or the strip and/or mechanical anchoring.
• the proposed apparatus 100 may comprise means for driving the support 22, adapted to carry out a strip feed and to apply the support 22 against the lower face 12B of the base 12 downstream of the material distribution means 106, in particular continuously in the longitudinal direction MD and/or in the transverse direction CD.
• the equipment as presented comprises support driving means 112, here consisting of two rollers 112A, 112B, configured to provide a supply of support 22 downstream of the distribution means of matter 106.
• the support 22 is typically a layer of non-woven material, a thermoplastic film, an elastic film or a composite film, or even a set of thermally consolidated fibers and/or filaments.
• the support 22 is for example a sheet of fibers and/or filaments.
• the support 22 is represented as being a layer of non-woven material.
• the substrate driving means 112 are configured to supply the equipment with support 22, and apply this support 22 against the lower face 12B of the base 12 downstream of the material distribution means 106, and downstream of the formation of the base 12 by application of the material against the molding strip 102 and in the cavities 102C.
• the substrate driving means 112 are configured so that this application is carried out prior to the solidification of the base 12. Thus, this application results in at least partial penetration of the support 22 beyond a plane defined by the lower face 12B of the base 12. We mark by the reference B in the figures the point of contact between the base 12 and the support 22.
• the lower face 12B of the base 12 is substantially flat, and defines a plane.
• Application of the substrate against this face results in penetration of portions of the support 22, for example fibers and/or filaments of the layer of non-woven material in the case where the support 22 is a layer of non-woven material within of the base 12, thereby passing through the lower face 12B of the base 12.
• the base 12 could be heated by the application of a hot fluid to the lower surface of the base 12 and/or on the upper surface of the support 22 or substrate to allow the fixing of the base 12 and the support 22, for example as described in the document WO2011087752 A2 incorporated by reference to the description and content of which reference may be made.
• substrate or “support” have the same meaning and are equivalent in such a way that they can be interchanged with one another.
• the application of the substrate against the lower face 12B of the base 12 is typically carried out when the lower face 12B of the base 12 has a temperature between melting temperature of the material and the Vicat B softening temperature of the material constituting it minus 30°C (degree Celsius) or between the melting temperature of the material constituting it and the Vicat A softening temperature of the material constituting it.
• the base comprises a material based on polypropylene
• the lower face 12B of the base 12 has a temperature of between 75°C and 150°C, typically of the order of 105°C, this temperature being typically measured using an infrared or laser camera.
• VICAT softening temperature means the temperature obtained according to one of the methods described in the ISO 306 or ASTM D 1525 standards with a heating rate of 50°C/h and a standardized load of 50N for VICAT B and a standardized load of ION for VICAT A.
• PP Polypropylene
• other types of materials than Polypropylene (PP) could be used, for example, another thermoplastic material such as Polyethylene (PE), a PE-PP copolymer, a polyamide (PA), a thermoplastic elastomer, a polyester, a polylactic acid (PLA), a Polybutylene adipate terephthalate (PBAT), these materials can be used independently or in combination.
• connection with the base 12 is also made by penetration into the base 12 of a portion of the fibers and/or filaments of the support 22 .
• the support 22 is a set of consolidated fibers and/or filaments, for example thermally consolidated, a thermoplastic film, an elastic film or a composite film
• a phenomenon may then result from the connection with the base. shrinkage of the base 12 during its cooling, this shrinkage favoring the connection surface between the substrate and the base of the ribbon. This shrinkage has no impact on the visual appearance for the end user.
• the application of the support 22 on the base 12 is typically carried out in such a way that, in the zone of the application of the support 22 on the base 12, the length of a development of the base 12 and the length of a development of the support 22 have a difference of less than 10%, in particular a continuous contact in the longitudinal direction MD and/or in the transverse direction CD is made between all or part of the lower surface of the base 12 and the support 22
• the developed designates the projection on a plane of an element considered, in this case the base 12 and the support 22 on a plane typically parallel to the interior face of the base 12.
• the demolding of the retaining elements is carried out easily even with a non-woven whose weight is less than 80 g/m 2 (mass of material in grams per square meter of nonwoven).
• the weight of non- woven can be between 5 g/m 2 and 120 g/m 2 , or between 25 g/m 2 and 100 g/m 2 , or between 10 g/m 2 and 70 g/m 2 , in certain cases , between 10 g/m 2 and 50 g/m 2 .
• the assembly formed by the base 12, the retaining elements 16 and the support 22 of the retaining device may have a weight of between 30 and 150 g/m 2 , in particular between 40 and 120 g/m 2 of support, more particularly between 45 and 100 g/m 2 of support, the weight value being indicated here in relation to the surface of the support 22.
• the equipment may include a calendering device upstream of the substrate driving means 112, thus making it possible to carry out a calendering step locally or not. of the layer of non-woven material prior to its application against the base 12.
• the support 22 can thus be calendered by zone prior to its application on the base 12, the calendered zones of the support 22 having a thinner thickness of at least 10%, preferably at least 30%, in the zones not calendered and a surface area greater than 5 mm 2 , in particular at least 15 mm 2 .
• these zones of distinct thickness will then determine zones of greater thickness put under pressure on the base 12 which are secured to the base 12, and calendered zones of lower thickness which are not secured to the base 12.
• an upper face of the non-calendered zones of the support 22 extends along an uncalendered plane PI' and an upper face calendered zones of the support 22 extend along a calendered plane P2' distinct from the non-calendered plane PI', the non-calendered zones of the support 22 being intended to be secured to the base 12 and the calendered zones of the support 22 being intended not to not be secured to the base 12.
• the upper face of the calendered zones of the support 22 extending along a calendered plane P2' extends in or substantially in the first plane PI corresponding to the upper face 22A of the substrate 22.
• the upper face of the calendered zones of the support extending along a calendered plane P2' can extend further from the base 22 than the first plane PI corresponding to the lower face 22B of the substrate 22 or vice versa.
• This method of securing a support 22 to a base 12 comprising retaining elements 16 is particularly advantageous in that it does not cause deformation of the base 12, and therefore advantageously allows the shape of the the base 12 obtained during the injection step, and in particular to maintain the straight edges which can be obtained via the method and equipment described above.
• This method of securing a substrate to a ribbon can be applied to a method of forming a ribbon as described above, or more generally to any other method of forming a ribbon comprising retaining elements such as only hooks.
• the application of the support 22 on the base 12 is here carried out in a non-uniform manner, so as to define portions of the base 12 secured to the support 22, and portions of the base 12 not secured to the support 22.
• portion of the base 12 secured or not to the support 22 is meant a portion of the base 12 delimited by a contour on its upper face 12A for which the lower face 12B of the base 12 is secured or not to the support 22, whatever the means of securing used.
• a non-secured portion can for example correspond to a portion for which a recess exists between the base 12 and the support 22 and/or for which the support 22 and the base 12 can be deformed independently of one of them. the other.
• roller 112B which has an irregular surface, for example provided with patterns, thus defining projections and hollows on the surface of the roller 112B. It is understood that the projections will apply a force tending to secure the support 22 to the base 12, while the recesses will not apply a force allowing such attachment.
• roller 112B is shown as having two notches defining hollow areas.
• Figure 18 shows an example of such a roller 112B.
• the roller comprises two pairs of grooves 113 formed on the external surface of the roller 112B, the two pairs of grooves being offset by 180°.
• each groove extends from a lateral end of the roller 112B on less than half of the roll in the transverse direction CD.
• the grooves 113 of each pair of grooves are arranged opposite each other. Thus, a regular or flat central portion is preserved between the grooves 113 of each pair of grooves.
• Such a configuration makes it possible to obtain a discontinuous connection in the machine direction MD, as for example illustrated in Figure 10 or to obtain a continuous connection in the machine direction MD, as for example illustrated in Figure 12.
• the roller 112B can be made of a material such as stainless steel, rubber, polyurethane, composite or a combination of several materials, in particular a combination of several of these materials. Roll 112B may also include one or more rings or envelopes carrying the lamination pattern according to the invention allowing them to be dismantled quickly and easily depending on the pressure zones to be applied. As an alternative embodiment, in the case where the substrate 22 is calendered beforehand, the roller 112B can be smooth.
• the exterior surface of the roller 112B may have a hardness less than or equal to 100 shore A, in particular less than or equal to 90 shore A and/or greater than 40 Shore A, in particular greater than or equal to 60 Shore A , measured according to the ISO 48-4:201 8 or ISO 868:2003 method.
• first set of zones in which the substrate 22 is secured to the base 12, and a second set of zones in which the substrate 22 is not secured to the base 12, the first set of zones extending in the first plane PI, and the second set of zones extending in the second plane P2.
• the second set of zones may in particular include zones not including or no longer including base 12.
• the substrate 22 penetrates at least partially into the base 12.
• the thickness of the substrate 22 extending to the exterior of the base 12 is reduced.
• the total thickness of the substrate 22 (that is to say the cumulative thickness of the substrate extending outside the base 12 and having penetrated into the base 12) in the zones of application of a force by the roller 112B is reduced compared to the initial thickness of the substrate 22.
• initial thickness of the substrate 22 we mean the thickness of the substrate upstream of roll 112B.
• the substrate 22 does not penetrate into the base 12.
• the thickness of the substrate extending outside the base 12 then typically corresponding at the initial thickness or substantially at the initial thickness of the substrate 22.
• the distance between the first plane PI and the second plane P2 is typically greater than 10 micrometers.
• the ratio of the distance between the first plane PI and the second plane P2 on the thickness of the base 12 is typically between 0.01 mm and 3 mm, in particular between 0.01 mm and 1 mm in other cases between 1 mm and 3 mm, in particular between 1 mm and 2.5 mm.
• the upper face 22A of the substrate 22 is in particular shown as being at a distance from the base 12 for purposes of illustration and readability of the figures, but it can be understood that it can rest against the lower face 12B of the base 12, or in the same plane.
• the roller 112B having solid portions adapted to apply a force tending to secure the support 22 to the base 12, and hollowed out areas, configured so as not to apply a force tending to secure the support 22 to the base 12 , includes a maximum exterior perimeter, and all straight lines extending in direction CD and passing through the maximum exterior perimeter intersect at least one point of the roller 112B.
• roller 112B is devoid of a surface cavity extending continuously over the entire width of the roller 112B along a straight line perpendicular to the machine direction MD. Continuous contact is thus not made in a zone where there is the base 12 but in a zone where there is no support 22.
• the connecting portions P can be provided with retaining elements 16 or be devoid of them, as shown respectively in Figures 4 and 5, depending on the configuration of the molding strip 102.
• the discontinuity in appearance of the support 22, in particular a discontinuity in the appearance of the support 22 visually discernible, is materialized by a difference in weight of support 22 and/or surface density of the fibers and/or filaments, and/or d 'thickness.
• “Visually discernible” means visible and visually detectable at a distance of approximately 0.5 meters or more, to the naked eye of an ordinary observer having 20/20 vision, under indoor lighting conditions desktop devices considered suitable for reading printed textual materials.
• connection portions P can be removed, for example during an ablation or weeding step.
• FIG. 2 The equipment presented in Figure 2 illustrates a particular embodiment for carrying out such steps. Alternatively, these steps can be carried out later.
• the intermediate product obtained is then packaged in reels or rolls, and the connecting portions P will then be removed during a subsequent step.
• a cutting device 120 is positioned, adapted to make cuts of the base 12, between each segment and each connecting portion.
• the cutouts are typically made so that all or part of the connecting portions P are separated from the segments S.
• the cutouts are typically made so as not to encompass a part of the segments S.
• the cutouts are made so as not to cross the connection zones between the base 12 and the support 22 which are here symbolized the penetration zones of the support 22 in the base 12.
• a non-zero gap D exists between the periphery of the penetration zones of the support 22 in the base 12 and the cutouts.
• a non-zero gap D exists between the periphery of the force application zones and the cutouts.
• the portions thus cut out are therefore devoid of zones in which the base 12 is secured to the support 22, which in particular makes it possible to avoid tearing or damage to the support 22 when removing the cut parts.
• the product obtained thus comprises a support 22 on which different retaining zones are secured, each retaining zone comprising a base provided with retaining elements. Due to the non-zero gap D between the periphery of the force application zones and the cutouts, it is understood that each retention zone has on all or part of its periphery a border of dimension D which is not secured to the support 22. This border can for example extend over a distance less than 3mm, in particular less than 2mm, less than 1mm or less than 0.5mm from the external periphery of each retention zone.
• the proposed device may have a reference means or element for cutting, for example a marking, a hole, an embossing or an ink layer, which may for example be formed on the upper face 12A of the base 12, so as to form a visual reference to guide the cutting operation or to allow simplified verification of the cuts made.
• a reference means or element for cutting for example a marking, a hole, an embossing or an ink layer, which may for example be formed on the upper face 12A of the base 12, so as to form a visual reference to guide the cutting operation or to allow simplified verification of the cuts made.
• a device comprising a support 22 and a plurality of disjoint segments secured to the support 22.
• These different base segments typically have a constant or substantially constant thickness, as opposed to areas of retaining elements which would be formed by localized deposits of material directly on the support 22 which would have a non-uniform thickness, and in particular which would decrease towards the edges of said zones.
• Figure 7 thus presents an example of the device obtained. Due to the non-zero difference D, it can be observed that the external periphery of the different segments is not secured directly to the support 22, whether by welding, the addition of an adhesive or by partial encapsulation of the support 22 in the base 12. According to one example, D is greater than Omm and less than 3mm, in particular less than 2mm, more particularly in particular less than 1mm, and in particular in particular less than 0.5mm.
• At least 10%, in particular 15%, 20%, 25%, 30%, 35% or 45% of the periphery of the segments can be calendered and/or secured to the support 22.
• At least 50%, in particular 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or 100% of the surface of the portion of periphery is not secured to the support.
• at least 50%, in particular 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90% or 95% of the surface of the periphery portion is secured to the support 22
• 100% of the surface of the periphery portion is secured to the support 22.
• all or part of the periphery portion secured to the support 22 has a thickness less than the thickness of an interior portion of the. basic segment considered.
• the surface of the periphery portion secured to the support 22 may have a decreasing shape whose decrease is oriented towards the outside of the base 12, for example the base 12 has the general shape of a bevel.
• Figure 8 presents a detailed view of the example illustrated in Figure 2.
• the consolidation device 150 is here configured so as to calender an upstream end of a segment and the downstream end of another segment.
• the consolidation device if necessary, crushes the retaining elements 16 present at the periphery of the segments, and carries out a calendering operation and thus reduces the thickness of the base 12 on all or part of the periphery of each segment.
• the calendering operation is typically carried out on all or part of a periphery of each segment, typically including all or part of a periphery of each segment not secured to the base 12, and may also include all or part of 'a periphery of each segment secured to the base 12.
• the thickness of the base 12 can then be reduced by a minimum of 10, 20, 30 or 40%, and a maximum of 50, 60, 70 or 80%.
• the reduced thickness of all or part of the periphery of the base, or each segment of the base typically results from the calendering operation, and not from the formation of the base by injection of material.
• the consolidation device 150 and the calendering that it produces typically makes it possible to secure or confirm or reinforce the securing of the support 22 to the base 12.
• the cutting device 120 and the removal device 130 are here represented as being two rollers placed on either side of the product after demolding.
• a device 125 for calendering preforms which comprises a roller 125 for calendering preforms associated with a second roller 127 forming a calendering support to form retaining elements . It is understood that this example is not limiting, and that any suitable preform calendering device can be used, in particular, the preform calendering device 125 could be arranged before or after the consolidation device 150 and/or before or after the removal device 130 and/or before or after the cutting device 120.
• the consolidation device 150 takes the form of a device comprising a hammer and anvil system designated respectively by the references 150 and 152. It is understood that this embodiment is not limiting, and that the consolidation device can take any form suitable for crushing or calendering all or part of the periphery of the segments, for example a cam movable in translation.
• the consolidation device 150 can be a hot calendering module or even an ultrasonic welding module, for example an ultrasonic welding module with a rotating head.
• the cutting can be carried out simultaneously with the cutting step, according to one example, the cutting can be carried out by an ultrasonic system, advantageously allowing the cut edge to be welded simultaneously.
• Figure 10 schematically represents an example of a device obtained at different stages.
• the retaining device has a ratio of the distance S to the distance P, in the longitudinal direction MD, which is greater than 1, in particular greater than 1.5, in particular greater than 5, in particular greater than 10 and/or less than 2000, in particular less than 1000, more particularly less than 500, in particular less than 200, in particular less than 100, or which is greater than or equal to 0, in particular greater than 0.1, in particular greater than 0.2 and/or less than or equal to 1, in particular less than 0.9, more particularly less than 0.8.
• the retaining device has a ratio of the distance S to the distance P, in the transverse direction CD, which is greater than 1, in particular greater than 1.5, in particular greater than 5, in particular greater than 10 and/or less than 2000, in particular less than 1000, more particularly less than 500, in particular less than 200, in particular less than 100, or which is greater than or equal to 0, in particular greater than 0.1, in particular greater than 0.2 and/or less than or equal to 1, in particular less than 0.9, more particularly less than 0.8.
• This figure shows a device comprising the support 22 on which the base 12 is formed in a continuous manner.
• the base 12 is partially secured to the support 22.
• the connecting segments S are here cut out and removed via cutouts made in the transverse direction CD.
• We thus obtain a product comprising the support 22 and a plurality of disjoint segments secured to the support 22, these segments here retaining their initial width to the extent that in this example, only cuts in the transverse direction CD are made.
• the base 12 typically has a width (measured in the transverse direction CD) strictly less than the width of the support 22.
• the base 12 is thus arranged on the support 22 so that the support 22 has areas devoid of base on either side of base 12 in the transverse direction CD.
• the periphery of the base 12 is at all points at least 3mm distant from the periphery of the support 22.
• the total dimension of the base in the longitudinal direction MD, or the sum of the different base portions in the longitudinal direction MD is strictly smaller than the dimension of the support 22 in the longitudinal direction MD.
• Figure 11 shows another example of a device obtained at different stages.
• FIG. 10 shows a device comprising the support 22 on which the base 12 is formed in a continuous manner.
• the attachment of the support 22 to the base 12 is here carried out so as to define geometric shapes, here having the shape of a portion of a ring or a bean or a peanut or any other shapes with retaining elements such, for example those described in the documents WO2019145646 Al, WO2021116612 Al, WO2021116613 Al.
• the areas secured to the support 22 which thus correspond to the segments are marked by dotted lines.
• the segments S of the base 12 are therefore surrounded here by connecting portions not secured to the support 22.
• the cutouts are made around each segment, and are represented by dotted lines surrounding each segment.
• There material removed from the strip here forms a continuous ribbon with recesses corresponding to the segments S.
• the base 12 may have a single continuous segment extending in the longitudinal direction MD.
• the cuts are then made on either side of this segment in the transverse direction CD.
• Figure 12 schematically represents such a variant. In this embodiment, we see that the cuts have been made on either side of a continuous strip of material extending in the longitudinal direction MD.
• the base 12 obtained at the end of the cutting step is delimited by two parallel straight lines extending in the longitudinal direction MD, the base 12 has a rate occupancy of the area delimited between these two parallel straight lines strictly less than 100%, or for example less than 95% or less than 80%, typically greater than 5%, for example greater than 15%, greater than 35% or greater at 55%.
• the base 12 has retaining elements 16 formed uniformly or substantially uniformly on its upper face 12A. It is understood that these examples are not limiting, and that the retaining elements 16 may only be formed on a part of the upper face 12A of the base 12, for example only on the parts of the upper face 12A corresponding to the segments S , that is to say the parts of the base which are secured to the support 22.
• the segments obtained can form different patterns, depending on the desired technical and visual effect.
• the strips thus obtained can then be cut to obtain retaining devices in order to integrate them into different products or articles.
• the products obtained are typically associated with a complementary device comprising a complementary base provided with complementary elements adapted to cooperate with the retaining elements for form a self-gripping connection.
• the complementary device may then have or not have properties and a structure similar or identical to the device as described.
• the invention as proposed thus makes it possible to produce retaining devices comprising a support 22 on which segments provided with retaining elements secured to the support 22 are arranged. These segments have a constant thickness, where appropriate at the exception of all or part of the periphery which is calendered in order to improve its mechanical strength. The segments obtained are thus more regular and have better homogeneity compared to products obtained by localized deposits of material on the support.
• the proposed invention makes it possible to form a device provided with different segments spaced from each other in the longitudinal direction MD, which is complex to achieve by conventional methods which generally provide differentiation according to the transverse direction CD via methods co-extrusion which are not suitable for such formation of disjoint segments in the longitudinal direction MD. Indeed, conventional processes which generally offer differentiation according to the transverse direction CD only require a change in the shape of the die which is not the case for a device provided with different segments spaced from each other according to the longitudinal direction. MD.
• the method used makes it possible to preserve the support 22 by avoiding tearing or degradation of the support 22 when removing portions of the base 12 while reducing and limiting the quantity of material used to make the base and the retaining elements to the desired function. In other words, it is possible to obtain a product which does not include an oversized base due to constraints linked to the manufacturing process of the base and/or the retaining elements.
• the manufacturing process used also allows recycling of the material of the base 12 which is removed during the process.
• the scraps can therefore be recycled and reinjected into the process, particularly for the formation of the base 12.
• the material injected to form the base can contain between 1 and 80% recycled material, or between 10 and 50% recycled material.
• Figures 13, 14, 15 and 16 show different examples of retaining elements that can be used.
• the retaining elements are hooks having a body having a generally triangular shape, and a head extending from the top of the body towards one side, so as to to form a retaining portion.
• Such types of retainers are typically arranged in pairs with heads extending in two opposite directions.
• FIG. 16 presents retaining elements each comprising a rod, and a head formed by a disk extending from the free end of the rod, the disk extending radially around the rod so as to form gripping portions.
• a head can take the shape of a disc, or more generally any shape adapted so as to form fins extending around the free end of the rod.
• Figure 17 is a variant of Figure 13, in which the retaining elements are of the type described with reference to Figure 16.
• the device can comprise several distinct base portions.
• FIG 19 shows a variant illustrating such an embodiment.
• This figure shows a variant of Figure 11; we find the base 12 provided with retaining elements 16.
• the portions of the base 12 not secured to the support 22 are not provided with retaining elements.
• a portion of the support 22 is secured to a part of the base devoid of retaining elements.
• a device 10 is thus obtained comprising a base 12 provided with retaining elements 16 as already described previously, and also a complementary base 13 devoid of retaining elements, separated from the base 12, and secured to the support 22.
• Such an embodiment makes it possible in particular to define gripping zones.
• the device as presented can in particular be used in the context of an absorbent article, for example of the diaper type for babies or an incontinence diaper for adults, which comprises
• the retaining device comprises a ratio of the surface S to the surface P which is greater than 1, in particular greater than 1.5, in particular greater than 5 and/or less than 2000, in particular less than 1000, more particularly less than 500.
• the retaining device comprises a ratio of the surface S to the surface P which is greater than or equal to 0, in particular greater than 0.1, in particularly greater than 0.2 and/or less than or equal to 1, in particular less than 0.9, more particularly less than 0.8.
• the cutting operation, the material removal operation and the operation of securing to the support 22 are carried out simultaneously, for example with an ultrasonic welding module, for example an ultrasonic welding module with a rotating head.
• the cutting operation, and the operation of securing the base 12 to the support 22 are carried out simultaneously, for example with an ultrasonic welding module, for example an ultrasonic welding module with a rotating head.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Rod-Shaped Construction Members (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
• Air Bags (AREA)
• Buckles (AREA)
• Braking Arrangements (AREA)
• Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
• Moulding By Coating Moulds (AREA)
• Insertion Pins And Rivets (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=84488372

Family Applications (1)

Country Status (5)

Family Cites Families (11)

• 2022
  • 2022-10-11 FR FR2210401A patent/FR3140522B1/fr active Active
• 2023
  • 2023-10-04 WO PCT/FR2023/051535 patent/WO2024079409A2/fr not_active Ceased
  • 2023-10-04 EP EP23794083.8A patent/EP4601849A2/de active Pending
  • 2023-10-04 JP JP2025520885A patent/JP2025533213A/ja active Pending
  • 2023-10-04 CN CN202380072130.3A patent/CN120112402A/zh active Pending

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