Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
  • B32B5/022—Non-woven fabric
• • 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
  • A61F13/49014—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the side panels
  • A61F13/49015—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the side panels the elastic means being elastic panels
• • 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
  • A61F13/56—Supporting or fastening means
  • A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
  • A61F13/5633—Supporting or fastening means specially adapted for diapers or the like open type diaper
  • A61F13/5638—Supporting or fastening means specially adapted for diapers or the like open type diaper adjustable open type diapers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/56—Supporting or fastening means
  • A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
  • A61F13/565—Supporting or fastening means specially adapted for diapers or the like pants type diaper
  • A61F13/5655—Supporting or fastening means specially adapted for diapers or the like pants type diaper adjustable pants type diapers
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F13/00—Bandages or dressings; Absorbent pads
  • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
  • A61F13/56—Supporting or fastening means
  • A61F13/62—Mechanical fastening means ; Fabric strip fastener elements, e.g. hook and loop
  • A61F13/622—Fabric strip fastener elements, e.g. hook and loop
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
  • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
  • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
  • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/02—2 layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/03—3 layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B2262/02—Synthetic macromolecular fibres
  • B32B2262/0223—Vinyl resin fibres
  • B32B2262/023—Aromatic vinyl resin, e.g. styrenic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
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• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2262/062—Cellulose fibres, e.g. cotton
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/51—Elastic
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2307/00—Properties of the layers or laminate
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  • B32B2307/514—Oriented
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
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  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
  • B32B2307/582—Tearability
  • B32B2307/5825—Tear resistant
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
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  • B32B2307/734—Dimensional stability
• • B—PERFORMING OPERATIONS; TRANSPORTING
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  • B32B2555/00—Personal care
  • B32B2555/02—Diapers or napkins

Definitions

• the present invention relates to an elastic laminate intended to be used in the field of hygiene, and in particular for diapers or adult incontinence diapers, the laminate extending along a given width generally corresponding to the CD direction (Cross Direction or Transversal Direction) and a long length generally corresponding to the direction of unwinding during the manufacture of the laminate, called the MD direction (Machine Direction), and comprising a stack of one or more layers of non -tissé and one or more elastic films extending over a width less than or equal to said given width, in particular two lower and upper nonwoven layers sandwiching the elastic film.
• CD direction Cross Direction or Transversal Direction
• MD direction Machine Direction
• These laminates are in particular intended to be used in the manufacture of elastic ears intended to carry hooks and to be fixed to the edges of the central rear part of the waistband of a diaper to cooperate with loop elements originating from the part front of the belt to achieve an elastically adaptable removable closure of the diaper.
• the present invention thus relates, according to a first aspect, to a laminate extending in width, in particular in the direction CD, and in length, in particular in the direction MD, which comprises:
• the layer or layers of nonwoven forming the at least one layer of nonwoven extending over a total width of nonwoven, in particular in the direction CD
• - at least one elastic film of elastomeric material fixed by an upper face, respectively lower, to a lower face, respectively upper, of the at least one layer of nonwoven, the elastic film(s) of elastomeric material forming the at least one elastic film of elastomeric material extending over a total width of elastic
• the ratio equal to the total width of elastic over the total width of nonwoven is between 0.3 and 0.9, preferably between 0.4 and 0.8, in particular between 0.6 and 0.8;
• the SET at 100% elongation of the laminate and/or of the at least one elastic film of elastomeric material, measured, in the width direction, with a sample having a length and a width and in which the elastomeric material extends over the entire length and/or over the entire width, is greater than 6%, in particular greater than 15%, in particular between 6% and 30%, in particular between 15% and 30%.
• the 100% SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 6%, in particular greater than 7%, 8%, 9%, 10%, 1%, in some cases, less than 30%, in particular less than 25%, 20%, 19%, 18%, 17%.
• the elastomer material of the elastic film or films has a Shore A hardness, in particular measured according to the ISO868:20O3 standard, of between 50 and 90, in particular between 60 and 80.
• the SET at 40% elongation of the laminate and/or of the elastic film of elastomeric material, measured with a sample having a length and a width and in which the elastic in elastomeric material forming the at least one elastic film of elastomeric material extending over a total width of elastic extends over the entire length and/or over the entire width is greater than 2.25%, in particular greater than 2, 5%, 2.75%, 3%, 3.25%, in certain cases less than 15%, in particular less than 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7 %, 6%.
• the SET at 60% d the elongation of the laminate and/or of the elastic film of elastomeric material, measured with a sample having a length and a width and in which the elastic extends over the entire length and/or over the entire width is greater than 3, 5%, more particularly greater than 4%, in particular greater than 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, in certain cases less than 20%, in particular less than 15% , 14%, 13%, 12%, 11%, 10%, 9%.
• the SET at 80% elongation of the laminate and/or elastic film of elastomeric material, measured with a sample having a length and a width and in which the elastic extends over the full length and/or over the full width is greater 5%, in particular greater than 6%, 7%, 8%, 9%, 10%, in certain cases less than 25%, in particular less than 20%, 19%, 18%, 17%, 16%, 15% , 14%, 13%.
• the SET at 120% elongation of the laminate and/or of the elastic film of elastomeric material, measured with a sample having a length and a width and in which the elastic extends over the entire length and/or over the entire width is greater than 7%, in particular greater than 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20% in certain cases less than 30%, in particular less than 29%, 28%, 27%, 26%, 25%, 24%.
• elongation between 100% and 120%, measured for the elongations at 40%, 60%, 80% and 100%, during a measurement operation in which a first 40% stretch, a return to 0%, a second stretch to 40%, a return to 0%, a stretch to 60%, a return to 0%, a third stretch to 40%, a return to 0%, a 80% elongation, a return to 0%, a fourth elongation to 40%, a return to 0%, a 100% elongation, a return to 0%, a fifth elongation to 40%, a return to 0% and a elongation to break, the SET of elongations at 40%, 60%, 80% and 100% being calculated respectively at the second, third, fourth and fifth elongation at 40%, or
• a first elongation at 40 is carried out in succession %, a return to 0%, a second stretch to 40%, a return to 0%, a stretch to 60%, a return to 0%, a third stretch to 40%, a return to 0%, a stretch to 80 %, a return to 0%, a fourth elongation to 40%, a return to 0% and an elongation until rupture, the SET of elongations at 40%, 60% and 80% being calculated respectively at the second, third and fourth elongation at 40%, is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20, the elongation being carried out in a direction CD (Cross direction) or MD (Machine Direction).
• the ratio of the laminate has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of the laminate has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of laminate has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of the laminate has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio [SET (in %) / Elongation (in %/100)] of the laminate is between 6 and 22, in particular between 8 and 17 %.
• the SET of the 40% laminate is between 2.5% and 8% and/or the SET of the 60% laminate is between 4% and 15%, in particular between 5% and 10% and /or the SET of the 80% laminate is between 5% and 20%, in particular between 10% and 15% and/or the SET of the 100% laminate is between 7% and 25%, in particular between 15% and 20 % and/or the SET of the 120% laminate is between 7% and 30%, in particular between 10% and 27%, in particular between 20% and 25%.
• the advantage is obtained that the laminate self-adjusts, in particular when it is used in a diaper, in particular at the level of the elastic ears of the waistband of it.
• the SET and/or the high ratio allows the first user to plastically deform the elastic ear of the diaper and enlarge it by stretching it by hand while keeping a minimum of elasticity to adjust it and keep it in place. place on the diaper wearer.
• the laminate comprises a second non-woven fabric placed on the second upper face, respectively lower face, of the at least one elastic film of elastomeric material.
• a first elongation to 40% a return to 0%, a second elongation to 40%, a return to 0%, an elongation at 60%, a return to 0%, a third elongation at 40%, a return to 0%, an elongation at 80%, a return to 0%, a fourth elongation at 40%, a return to 0%, an elongation at 100%, a return to 0%, a fifth elongation at 40%, a return to 0%, an elongation at 120%, a return to 0%, a sixth elongation at 40%, a return to 0% and an elongation until rupture, the SET of the elongations at 40%, 60%, 80%, 100% and 120% being calculated respectively at the second, third, fourth
• elongation between 100% and 120%, measured for the elongations at 40%, 60%, 80% and 100%, during a measurement operation in which a first 40% stretch, a return to 0%, a second stretch to 40%, a return to 0%, a stretch to 60%, a return to 0%, a third stretch to 40%, a return to 0%, a 80% elongation, a return to 0%, a fourth elongation to 40%, a return to 0%, a 100% elongation, a return to 0%, a fifth elongation to 40%, a return to 0% and a elongation to break, the SET of elongations at 40%, 60%, 80% and 100% being calculated respectively at the second, third, fourth and fifth elongation at 40%, or
• a first elongation at 40 is carried out in succession %, a return to 0%, a second stretch to 40%, a return to 0%, a stretch to 60%, a return to 0%, a third stretch to 40%, a return to 0%, a stretch to 80 %, a return to 0%, a fourth elongation to 40%, a return to 0% and an elongation to break, the SET of the elongations at 40%, 60% and 80% being calculated respectively at the second, third and fourth elongation at 40%, is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20, the elongation being carried out in a direction in CD (Cross direction) or in MD (Machine Direction).
• the ratio of at least one elastic film of elastomeric material has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of at least one elastic film of elastomeric material has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of at least one elastic film of elastomeric material has a value which is between 6 and 30, in particular between 8 and 25, in particular between 8 and 20.
• the ratio of the at least one elastic film of elastomeric material has a value which is between 6 and 30, in particular between 8 and 25, especially between 8 and 20.
• the SET of at least one elastic film of elastomeric material at 40% is between 2.5% and 8% and/or the SET of at least one elastic film of elastomeric material at 60% is between 4% and 15%, in particular between 5% and 10%, and/or the SET of at least one elastic film of 80% elastomeric material is between 5% and 20%, in particular between 10% and 15% and/or the SET of the 100% laminate is between 7% and 25%, in particular 15% and 20% and/or the SET of the 120% laminate is between 7% and 30%, in particular between 10% and 27%, in particular between 20% and 25%.
• the SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 2.25% , in particular greater than 2.5%, 2.75%, 3%, 3.25%, in certain cases less than 5%, in particular less than 14%, 13%, 12%, 11%, 10%, 9 %, 8%, 7%, 6%.
• the SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 3.5%, more particularly greater than 4%, in particular greater than 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, in certain cases less than 20%, in particular less than 15%, 14%, 13%, 12%, 11%, 10%, 9%.
• the SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 5%, in particular greater than 6%, 7%, 8%, 9%, 10%, in certain cases less than 25%, in particular less than 20%, 19%, 18%, 17%, 16%, 15%, 14%, 13%.
• the SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 6%, in particular greater than 7%, 8%, 9%, 10 %, 11%, in certain cases less than 30%, in particular less than 25%, 20%, 19%, 18%, 17%.
• the SET of the laminate and/or of the at least one elastic film of elastomeric material is greater than 7%, in particular greater than 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20% in certain cases less than 30%, in particular less than 29%, 28%, 27%, 26%, 25%, 24%.
• the elongation strength of the 100% CD laminate is greater than 7N, in particular greater than 8, 9, 10, 11 N.
• the nonwoven is a nonwoven based on short fibres, in particular a carded nonwoven, for example a Spunlace or a heat-bonded carded nonwoven.
• the thickness of the elastic film of elastomeric material is between 30 and 60 micrometers, in particular between 40 and 60 micrometers, in particular the thickness of the elastic film of elastomeric material is measured in the rest state, before the first elongation.
• an elastic film of elastomeric material is an elastic film which comprises at least 50% by mass of elastomeric material, in particular at least 60% by mass of elastomeric material, more particularly at least 70% by mass of elastomeric material, more particularly at least 80% by mass of elastomeric material and/or up to 100% by mass of elastomeric material, in certain cases less than 99% by mass of elastomeric material, in particular in certain cases less than 98% by mass of elastomeric material.
• the fixing of the at least one film to the at least one layer of nonwoven is carried out by interposing an adhesive, for example glue, along strips or lines of glues s extending lengthwise in the MD direction and spaced apart in the CD direction.
• an adhesive for example glue
• the curve giving the SET of the laminate and/or of the elastic film of elastomeric material as a function of the elongation increases in the range from 40% to 120%, in particular by having a slope greater than 0.10 per % elongation/elongation/stretch, in particular between 0.11 and 0.40 per % elongation/elongation/stretch.
• the present invention also relates to a diaper for babies or an adult incontinence diaper comprising at least one laminate according to the invention, in particular to form the hook tabs coming laterally from the rear waistband of the diaper. panties or incontinence, so that the hooks cooperate with loops from the front face of the waistband of the diaper, to achieve the closure of the diaper or incontinence.
• the present invention also relates to a laminate with hooks, comprising a laminate according to the invention and at least one ply with hooks fixed to the laminate, in particular on the upper nonwoven layer.
• FIG. 1 represents the curves giving the force as a function of the stretching obtained during the so-called measurement operation at 10 cycles + rupture for Example 1 of a laminate of the present invention.
• Figure 2 shows the curves giving the force as a function of stretching obtained during the so-called measurement operation at 10 cycles + rupture for Comparative Example 1.
• Figure 2A shows the curves giving the force as a function of the stretch obtained during the so-called measurement operation at 10 cycles + rupture for Comparative Example 2.
• FIG. 3 represents the parts of the curves of the preceding figures, respectively for Example 1 and Comparative Example 2, relating to the second stretching/elongation/elongation at 40%.
• FIG. 4 represents the parts of the curves of the preceding figures, respectively for Example 1 and Comparative Example 2, relating to the third stretching/elongation/elongation at 40%.
• FIG. 5 represents the parts of the curves of the preceding figures, respectively for Example 1 and Comparative Example 2, relating to the fourth stretching/elongation/elongation at 40%.
• FIG. 6 represents the parts of the curves of the preceding figures, respectively for Example 1 and Comparative Example 2, relating to the fifth stretching/elongation/elongation at 40%.
• FIG. 7 represents the parts of the curves of the preceding figures, respectively for Example 1 and Comparative Example 2, relating to the sixth stretching/elongation/elongation at 40%.
• FIG. 8 represents a table giving, for all the samples of table 1, all the relaxation values (in percentage) and the forces (in newtons) as well as their respective averages
• FIG. 8A represents a table giving all the results of the measurements for all the samples, a summary of these measurements being provided in Table 1.
• Figure 9 is a sectional view of a laminate according to the invention.
• Figure 10 shows a layer comprising elastic ears formed from a laminate according to the invention.
• Figure 11 shows part of the curve of Figure 1 illustrating a way to measure the SET.
• a laminate comprises in succession from top to bottom, a layer 1 of upper nonwoven, two elastic films 2d, 2g of elastomeric material respectively right and left and a layer 3 of lower nonwoven.
• the two elastic films 2d, 2g extend in the direction CD over a distance less than the distance over which the two layers of nonwoven 1 and 3 extend, so that it is formed on the left edges and right of the laminate and in the center two edge regions and a central region without elastic film.
• the upper nonwoven layer 1 and the elastic films 2d, 2g are fixed by interposing between them bands or lines 4d, 4g of adhesive, in particular of glue, which extend in length in the direction MD and are away from each other in the CD direction.
• the lower nonwoven layer 3 and the elastic films 2d, 2g are fixed by interposing between them bands or lines 5d, 5g of adhesive, in particular glue, which extend in length in the direction MD and are spaced apart in the CD direction.
• the two nonwovens 1 and 3 are fixed directly to each other (that is to say without interposition of elastic thread, only adhesive being present between them) by fields 6d, 7d, 6c, 7c, 6g, 7g respectively right, central and left extending in the direction MD and having a width substantially equal to the respective width of the edge and central regions.
• the two lower and upper nonwoven layers extend in the CD direction over the entire width of the laminate.
• This width represents the total nonwoven width.
• the two elastic films 2g, 2d of elastomeric material each extend over a respective width less than half the width of the laminate.
• the sum of the two respective widths over which the two films extend represents the total elastic width.
• the ratio or ratio of the total width of elastic to the total width of nonwoven is here between 0.4 and 0.8, and in particular is equal to about 0.6 in Figure 9.
• an adhesive such as non-reactive hot melt adhesives, for example H2511 from Bostik or XPU18314 from Bostik (PU glue reactive).
• these adhesives will have a chemical nature similar to the elastomeric film.
• one of these adhesives is analyzed with an infrared spectrometer, to identify the chemical functions, or liquid chromatography to separate and quantify the substances, one will preferably find traces of one or more components or their derivatives. material or materials of the elastomeric film.
• these adhesives are based on SIS, SBS, SEBS and SEPS, allowing good affinity with the film by similar chemical materials.
• the adhesive layer has a basis weight of less than 15 g/m 2 , in particular less than 12 g/m 2 , more preferably less than 8 g/m 2 .
• nonwoven means a product obtained after the formation of a sheet of fibers and/or filaments which has been consolidated.
• the consolidation can be mechanical, chemical or thermal and results in the presence of a bond between the fibers and/or the filaments.
• This consolidation can be direct, that is to say made directly between the fibers and/or filaments by welding, or it can be indirect, that is to say via an intermediate layer between the fibers. and/or the filaments, for example a glue layer or a binder layer.
• nonwoven refers to a ribbon-like structure or sheet of fibers and/or filaments which are interwoven in a non-uniform, irregular or random manner.
• a nonwoven can have a single layer structure or a multi-layer structure.
• a nonwoven can be made from various synthetic and/or natural materials.
• Exemplary natural materials are cellulose fibers, such as cotton, jute, pulp, linen, and the like, and may also include re-processed cellulose fibers, such as rayon or viscose (cellulose acetate ).
• Natural fibers for a nonwoven material can be prepared using various processes such as carding.
• Exemplary synthetic materials include, but are not limited to, synthetic thermoplastic polymers, which are known to form fibers and/or filaments which include, but are not limited to, polyolefins, e.g., polyethylene, polypropylene, polybutylene and the like; polyamide, for example polyamide 6, polyamide 6.6, polyamide 10, polyamide 11, polyamide 12 and the like; polyesters, for example polyethylene terephthalates, polybutylene terephthalates, polylactic acids (PLA) or PHA (Polyhydroxyalkanoates) and the like, polycarbonates, polystyrenes, thermoplastic elastomers, vinyl polymers, polyurethanes and mixtures and co-polymers of these.
• synthetic thermoplastic polymers which are known to form fibers and/or filaments which include, but are not limited to, polyolefins, e.g., polyethylene, polypropylene, polybutylene and the like
• polyamide for example polyamide 6, polyamide 6.6, polyamide 10, poly
• Some of these materials can be bio-plastic, for example bio-sourced (for example Bio-PE, PLA, polyamide 11, viscose (cellulose acetate), and the like) and/or biodegradable (PLA and the like).
• bio-sourced for example Bio-PE, PLA, polyamide 11, viscose (cellulose acetate), and the like
• PLA biodegradable
• fibers and filaments differ mainly in their length and in their method of manufacture.
• continuous filaments are meant the individual elements, of very long lengths with respect to the diameter in which their section is inscribed, extruded in a continuous manner to directly form a sheet of nonwoven which can then be consolidated by thermo- binding or any other means to enable the achievement of the desired performance and/or their transport.
• the continuous filaments Preferably, have a length greater than 120mm.
• fiber is meant the generic term to designate a textile material or an element of textile material of reduced length, less than the length of the continuous filaments, and capable of being spun and/or used in the production of nonwovens.
• fibers There are two types of fibers, short fibers formed of discontinuous material of short length less than 50 mm (preferably from 25 mm to 50 mm) and long fibers formed in a discontinuous manner of great length greater than 50 mm (preferably from 60 mm to 120mm).
• the fibers are commonly oriented and organized in a sheet during a carding step well known to those skilled in the art. This sheet can then be consolidated by thermo-bonding or any other means to allow the achievement of the desired performance and/or their transport.
• film is understood to mean a material of sheet or film type, the length and width of which are each much greater than the thickness (for example in a ratio of 10x, 50x or even 1000x or more).
• a film has a thickness of less than 0.7 mm, in particular less than 0.5mm or less.
• a cord or a thread or a set of cords and/or threads are not films.
• an elastomeric thermoplastic material or a mixture comprising such a material can be used, in particular recyclable polyolefin elastomeric type, (for example based on Polypropylene (PP) and Polyethylene (PE), for example the Vistamaxx range from Exxon, or the Infuse, Engage and Versify ranges from Dow Chemical and which can be combined with one another or with other polyolefins depending on the performance envisaged for the application
• a propylene elastomer in particular the "Vistamaxx" range from EXXON MOBIL under the references 6000 and/or 6102 and/or 6102FL and/or 6202 and/or 6202FL and/or 6502, 7050BF and/or 7810, and/or an olefin block copolymer, in particular the “Infuse” range from DOW CHEMICAL under the references 9000 and/or 9007 and/or 9010 and/or 9077 and/or 9100 and/or 9107,
• the laminate according to the invention is possible in particular to manufacture the laminate according to the invention as described in EP-A-1783257, by preparing the elastic film or films by extruding it or them from one or more extrusion dies to obtain, after cooling , a substantially solid film or films, by laminating the substantially solid film or films to a layer of nonwoven by interposing a fixing agent, then, in the case of inelastic or insufficiently elastic nonwovens, by stretching the laminate transversely to break the fibers of the nonwoven(s) and/or the cohesion between them.
• This transverse stretching can in particular be carried out by "activation", i.e.
• Comparative example 1 comprises an elastic film of elastomeric material fixed between two layers of nonwovens via two layers of adhesives.
• the upper nonwoven is a Spunlace nonwoven designated under the reference “Sawasoft” with a basis weight of 30 g/m 2 available from Sandler.
• the lower nonwoven is a heat-bonded carded nonwoven designated under the reference “Sawabond 411 1” with a basis weight of 22 g/m 2 and available from Sandler.
• the elastic film of elastomeric material is made from an SIS material and has a basis weight of 50 g/m 2 .
• the glue based on SIS, has a weight of the order of 4.5 g/m 2 per layer of glue.
• the product is activated using a disc activation block conventionally used in the field.
• Comparative example 2 comprises an elastic film of elastomeric material fixed between two layers of nonwovens via two layers of adhesives.
• the upper nonwoven identical to the lower nonwoven, is a Spunlace nonwoven under the reference “Sawasoft 2626” with a weight of 25 g/m 2 available from the company Sandler.
• the elastic film of elastomeric material is made from an SIS material and has a basis weight of 50 g/m 2 .
• the glue based on SIS, has a weight of the order of 4.5 g/m 2 per layer of glue. The product is not activated.
• Example 1 comprises an elastic film of elastomeric material fixed between two layers of nonwovens via two layers of adhesives.
• the upper nonwoven identical to the lower nonwoven, is a 100% PLA-FLAT Spunlace nonwoven under the reference "15.020.001.0200.01.02” with a weight of 20 g/m 2 available from the company JACOB HOLM INDUSTRIES.
• elastic film in elastomer material comes from a TPE-E under the reference “APINAT DP1888-75CV” available from TRINSEO and extradited at a weight of 60 g/m z .
• the glue has an average weight of the order of 4 g/m 2 per layer of glue and has the reference “XPU 8314” available from the company BOSTIK.
• the glue is applied in full, in the zones without elastic and in the elastic zone near the ends of the elastic, and, in the form of lines or strips, in the other zones.
• the laminate is passed through an activation block composed of two rollers comprising stacked discs and whose interpenetration of the teeth is 3.33 mm without the product being held laterally, for example with central belt(s) and/or or lateral.
• Example 3 is similar to Example 1, with the following differences, the average glue weight is of the order of 3.5 g/m 2 and in that the glue is distributed differently, namely the glue lines and/or glue strips are more spaced from each other in CD in the elastic zone.
• Step 0a The element is conditioned, for example an elastic laminate or an elastic film of elastomeric material, for example a laminate coming directly from a reel or from a layer of a package of layers and in a normal atmosphere, temperature of 23°C (+/- 2° C) and with a relative humidity of 50% (+/- 5%) for a period of 24 hours.
• an elastic laminate or an elastic film of elastomeric material for example a laminate coming directly from a reel or from a layer of a package of layers and in a normal atmosphere, temperature of 23°C (+/- 2° C) and with a relative humidity of 50% (+/- 5%) for a period of 24 hours.
• Step 0b A sample with a dimension of 40mm in width and at least 40mm in height is cut, preferably with a cutter with a circular blade, so as to be able to characterize it over a height of 30mm and a width of 40mm.
• This sample is cut from the laminate so that it has an elastic film of elastomeric material that extends over its entire width and length.
• the product is stretched to the stretch at which it is desired to measure the SET, in particular at 100%, for example at a speed of 508 mm/min, by vertical displacement of the upper jaw, the lower jaw being fixed, then it is hold in the position for 30 seconds, then return to the initial position at constant speed where it is left for 60 seconds (end of the first cycle), then stretch it again to 100%, hold it for 30 seconds and returns to the initial position (end of the second cycle).
• the curve giving the stretching force as a function of the elongation in %, this one presenting a hysteresis which makes it possible to determine the Set by the following calculation formula:
• L0 Point of intersection with the X axis (Elongation in %) at the start of the test, i.e. the start of the first cycle.
• L1 Point of intersection with the X axis (Elongation in %) when starting the second cycle after returning to the original position and waiting for 60 seconds.
• the method described above can also be carried out at a stretch value other than 100%, for example a value of 40%, 60%, 80%, or 120% and provided that the stretch used at which it is desired to measure the SET is not less than a prior stretching of the product / sample.
• a pre-load is carried out up to 0.05N
• the measurements are taken (the results of the measurements are in the form of a curve giving the force applied as a function of the elongation or are deduced from this curve) during lengthening at a speed of 508 mm/min up to 40% elongation without tempo (first elongation/elongation/stretch at 40%).
• Measurements are taken during elongation at a speed of 508mm/min up to 40% elongation and the sample is held for 30 seconds (third elongation/elongation/stretch at 40%).
• a curve (10 cycles + ⁇ rupture) is then obtained at the output, like that obtained for the examples and comparative examples described below and represented in FIG. 1.
• the SETs are then measured on the curve (10 cycles + rupture). for each stretch, respectively at 40%, 60%, 80%, 100% and 120% and they are reported in Table 1 below.
• the curve giving the force as a function of the percentage of elongation is shown.
• the SET is read there directly and corresponds to the value of the elongation for a point of the curve selected in the interval of force between [0.05N - 0.1 N], this point being selected starting from the point with the elongation the stronger and decreases strictly until reaching the point with the weakest force.
• the SET recorded is 4.60%.
• Table 1 shows the results obtained for Comparative Examples 1 and 2 and Examples 1 and 3 above for the test at 6 cycles + rupture and 10 cycles + rupture.
• three samples, M1, M2 and M3, were made for each of the examples and comparative examples and the average of the three was reported. The results for all the samples are shown in the table of Figure 8.

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• 2021
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