WO2016040483A1 - A disposable article including at least one elastic bonded region - Google Patents

A disposable article including at least one elastic bonded region Download PDF

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Publication number
WO2016040483A1
WO2016040483A1 PCT/US2015/049186 US2015049186W WO2016040483A1 WO 2016040483 A1 WO2016040483 A1 WO 2016040483A1 US 2015049186 W US2015049186 W US 2015049186W WO 2016040483 A1 WO2016040483 A1 WO 2016040483A1
Authority
WO
WIPO (PCT)
Prior art keywords
hot melt
melt adhesive
elastic
disposable article
adhesive composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2015/049186
Other languages
English (en)
French (fr)
Inventor
Kristy J. Beckman
David B. Malcolm
Kevin P. Davis
Yuanyan GU
Peter Remmers
Thomas Wittkopf
Mark S. Kroll
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HB Fuller Co
Original Assignee
HB Fuller Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HB Fuller Co filed Critical HB Fuller Co
Priority to EP15766716.3A priority Critical patent/EP3191045B1/en
Priority to CN201580047864.1A priority patent/CN106794093A/zh
Priority to JP2017533171A priority patent/JP6910297B2/ja
Priority to KR1020177005708A priority patent/KR20170051432A/ko
Priority to MX2017002983A priority patent/MX369600B/es
Publication of WO2016040483A1 publication Critical patent/WO2016040483A1/en
Priority to ZA2017/00967A priority patent/ZA201700967B/en
Priority to CONC2017/0002333A priority patent/CO2017002333A2/es
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15699—Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
    • A61F13/15739—Sealing, e.g. involving cutting
    • 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
    • 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
    • A61F13/4902—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material
    • A—HUMAN NECESSITIES
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    • 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
    • A61F13/496—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 in the form of pants or briefs
    • A61F13/4963—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 in the form of pants or briefs characterized by the seam
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • A61F13/51—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 outer layers of the pads
    • A61F13/515—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 outer layers of the pads characterised by the interconnection of the topsheet and the backsheet
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    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/58—Adhesives
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J153/02—Vinyl aromatic monomers and conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
    • C09J153/02—Vinyl aromatic monomers and conjugated dienes
    • C09J153/025—Vinyl aromatic monomers and conjugated dienes modified
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
    • A—HUMAN NECESSITIES
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    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F2013/15821—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing
    • A61F2013/15861—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding
    • A61F2013/1591—Apparatus or processes for manufacturing characterized by the apparatus for manufacturing for bonding via adhesive
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    • 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
    • A61F13/4902—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material
    • A61F2013/49022—Form-fitting, self-adjusting disposable diapers with elastic means characterised by the elastic material being elastomeric sheet
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • 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
    • A61F2013/49042—Form-fitting, self-adjusting disposable diapers with only stretchable part, i.e. part being not elastic but only extensible with not a full recovery of its original length
    • A61F2013/49044—Form-fitting, self-adjusting disposable diapers with only stretchable part, i.e. part being not elastic but only extensible with not a full recovery of its original length being stretchable non-elastic panels
    • A61F2013/49049—Form-fitting, self-adjusting disposable diapers with only stretchable part, i.e. part being not elastic but only extensible with not a full recovery of its original length being stretchable non-elastic panels on the hips
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    • 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
    • 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
    • B32B5/08—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 the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • 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
    • B32B7/05—Interconnection of layers the layers not being connected over the whole surface, e.g. discontinuous connection or patterned connection
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/26—Presence of textile or fabric
    • C09J2400/263—Presence of textile or fabric in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2453/00—Presence of block copolymer

Definitions

  • Adhesives are often used to bond substrates together.
  • hot melt adhesives are commonly used to bond together a wide variety of articles including disposable absorbent articles comprising non-woven substrates e.g. diapers, training paints, surgical garments, swim wear, absorbent underpants, adult incontinence products, sanitary napkins and medical dressings (e.g. wound care products).
  • hot melt adhesives used in the manufacture of a disposable absorbent article.
  • hot melt adhesives are used for construction (e.g. bonding the backsheet to the nonwoven and optionally the absorbent pad), elastic attachment (e.g. bonding the elastic material to the backsheet in for example the leg or waist area), and for core stabilization (e.g. applying a hot melt adhesive to the absorbent core to increa se the strength of the core).
  • Hot melt adhesives can also be used to form elastic composites that are useful in disposable articles.
  • elastic composites are often formed in a 5-layer configuration including the following layers: nonwoven, hot melt adhesive, elastic material, hot melt adhesive, nonwoven.
  • the hot melt adhesive bonds the non adhesive elastic to the nonwoven to form a composite.
  • a hot melt adhesive with elastic properties can replace the elastic material to form simplified composites that can impart stretch to various portions of the disposable article.
  • the invention includes a disposable article including at least two adjacent bonded regions, the first bonded region, including: a first and second substrate; and an elastic hot melt adhesive composition between the first and second substrates thereby bonding the first and second substrates to each other; the elastic hot melt adhesive composition having a viscosity of less than about 15,000 cps at 350°F and a set after 50% hysteresis of no greater than about 20°/»; the second bonded region eomprismg:a first and second substrate; and a hot melt adhesive composition between the first and second substrates thereby bonding the first and second substrates to each other, the second bonded region having properties different from the first.
  • the at least two adjacent bonded regions comprise the same elastic hot melt adhesive applied at different coat weights.
  • the second bonded region comprises a second hot melt adhesive composition different from the elastic hot melt adhesive composition.
  • the two different hot melt adhesives are applied to the substrate using two different application methods.
  • the disposable article is a disposable absorbent article.
  • At least one of the substrates is nonwoven.
  • the nonwoven is aiiiaid, carded and hydroentangied.
  • the nonwoven is extensible to greater than 100% in the cross web direction.
  • the at least two adjacent bonded regions are used in a application selected from the group consisting of fastening ear, waist band, belly band and side panel.
  • three adjacent bonded regions make up the fastening ear; the three adjacent bonded regions comprising an elastic bonded region between two second bonded regions.
  • the disposable article is selected from the group consisting of diaper, absorbent undergarment, feminine hygiene product and medical bandage.
  • the disposable article is an absorbent undergarment including adjacent bonded regions throughout the absorbent undergarment, the adjacent bonded regions comprising elasticized regions alternating with second bonded regions.
  • the elastic hot melt adhesive composition includes about 30% by weight to about 60% by weight of one or more styrene block copolymers wherein the one or more styrene block copolymers has an average styrene content of at least about 30% by weight and an average MFR (200°C/5 kg) of no less than about 20, greater than about 10 % of a plasticizer and, a tackifying agent.
  • the elastic hot melt adhesive composition includes a tackifying agent that is a hydrocarbon resin with about 5% to about 20% by weight of aromatic content, and; a plasticizer that is a naphthenic oil.
  • the average styrene content of the one or more styrene block copolymers is at least about 40% by weight.
  • the one or more styrene block copolymers has an average MFR (200°C/5 kg) of no less than about 30.
  • At least one of the hot melt adhesives is applied to the substrate using an application method selected from the group consisting of slot and non contact coating. In another embodiment, at least one of the hot melt adhesives is applied to the substrate using an application method selected from the group consisting of screen printing, spraying, comb shim slot and gravure roll.
  • the invention claims a disposable article including at least two elastic regions, the elastic regions including: at least one substrate; and an elastic hot melt adhesive composition bonded to the substrate wherein the hot melt adhesive composition provides elasticity to the bonded area; the elastic hot melt adhesive composition having a viscosity of less than about 15,000 cps at 350°F and a set after 50% hysteresis of no more than about 20%.
  • the invention includes a disposable article including at least one layered bonded region, the layered bonded region including: a first substrate, an elastic hot melt adhesive composition coated in a continous coating on the first substrate, a second hot melt adhesive composition coated in a discontinuous manner on the elastic hot melt adhesive, and a second substrate; wherein the second substrate is bonded to the elastic hot melt adhesive composition through the second hot melt adhesive composition; the elastic hot melt adhesive composition having a viscosity of less than about 15,000 cps at 350°F and a set after 50% hysteresis of no more than about 20%.
  • Fig 1 is a top view of a diaper fastening tab comprising three adjacent bonded regions.
  • Fig 2 is an illustration of how three adjacent bonded regions could be applied to a substrate using three different coating heads.
  • Fig 3 is a front view of a absorbent undergarment with adjacent bonded regions present in a vertical stripe pattern throughout undergarment
  • hot melt adhesive compositions that can be used to form elastic regions that are useful in disposable articles (e.g. disposable absorbent articles).
  • the compositions have good elastic recovery and a viscosity of less than about 15,000 cps at 177°C (350°F).
  • the low viscosity makes it possible to apply the hot melt adhesive at a high line speed and register i.e. provide zoned application to only those areas requiring elastic performance.
  • the low viscosity further makes it possible to apply the hot melt adhesive within the disposable article manufacturing line.
  • the low viscosity of the hot melt adhesive composition gives flexibility to the user, resulting in the ability to create elastic bonded regions.
  • the disposable article can comprise at least two bonded regions, the at least two regions can be adjacent to each other.
  • adjacent it is meant that the two bonded regions are side by side.
  • the two adjacent bonded regions can slightly overlap each other.
  • At least one of the adjacent bonded regions is bonded with an elastic hot melt adhesive.
  • the second region can be bonded with an elastic hot melt adhesive or alternatively is bonded with a second hot melt adhesive.
  • the second hot melt adhesive can be used to introduce additional properties into the article e.g. stiffness (i.e. by use an adhesive with a higher modulus as compared to the elastic hot melt adhesive), breathabilitv, lower cost, improved adhesion and/or improved creep resistance.
  • the second hot melt adhesive can be used to control the extent to which the elastic hot melt adhesive can elongate by varying the width of the elastic bonded regions relative to the second bonded regions,
  • the at least two adjacent bonded regions are different from each other, in one embodiment, the same elastic hot melt adhesive applied at two different coat weights is used to construct two adjacent bonded regions,
  • the elastic region can include a first substrate and a hot melt adhesive composition.
  • the hot melt adhesive composition imparts elasticity to the first substrate.
  • the elastic region can include a first substrate, a second substrate and an elastic hot melt adhesive composition.
  • the elastic hot melt adhesive composition is present between the first and second substrate, permanently bonding the substrates to each other and providing elasticity in the bonded area.
  • the invention includes a layered bonded region.
  • the elastic hot melt adhesive can be coated in a continuous film on a first substrate and then a second hot melt adhesive is applied in a discontinous manner directly on top of the elastic hot melt adhesive.
  • the second hot melt can then be used to bond the second substrate to the elastic hot melt adhesive to form a composite with four layers: first substrate, elastic hot melt adhesive film, discontinous coating of a second hot melt adhesive, and second substrate.
  • One of the substrates can be a nonwoven. Any nonwoven can be used.
  • the nonwoven can contain fibers made from one or more polymers (e.g. PET (polyethylene terephthaiate), PBT (poiybutyiene terphthalate), nylon, polypropylene and polyethylene), one or more natural fibers (e.g. rayon cellulose, cotton cellulose, hemp and viscose) or combinations thereof,
  • the nonwoven can be formed by a number of different methods, including e.g. airlaid, wetlaid, spunbond or meltblown.
  • the fibers can be carded (e.g. run through a comb) so that they are oriented in a particular direction.
  • the webs can be bonded together in any manner including e.g, hydroentangled, chemical bonded, needle punched or thermally bonded.
  • the nonwoven is comprised of a blend of polypropylene and polyethylene fibers which are airlaid, carded and hydroentangled.
  • the nonwoven may be a self-elastic. This is accomplished by incorporation of elastic fibers into the nonwoven, or by incorporating absorbed elastic material to improve elasticity. Hot melt adhesives described herein can be used in conjunction with el astic nonwoven to augment the elastic performance of the composite.
  • one of the substrates can be nonwoven and the other can be a polymer film.
  • Any polymer film can be used.
  • the polymer film can be selected from the group consisting of polyethylene, polypropylene, polyethylene copolymers, polypropylene copolymers, and PET.
  • the first and second substrate can be nonwo ven.
  • the nonwoven can have a basis weight of less than 40 gsm (grams per square meter), less than 35 gsm, or even less than about 30 gsm.
  • the nonwoven can be extensible to greater than 100 % in the cross ⁇ web direction, At least one of the substrates is selected from the group consisting of nonwoven and polymer film.
  • Various post treatments such as treatment with grooved rolls i.e. activation can be used to adjust the mechanical properties (e.g. extensibility) of the composite.
  • the elastic hot melt adhesive can be applied to the first and/or second substrate using a variety of applicator methods including slot coating, non-contact coating, comb shim coating, spraying including, e.g., spiral spraying and random spraying, screen printing, foaming (e.g. using chemical foaming agents or a Nordson FoamMelt® Dispensing System), engraved roller, gravure roller, extrusion and meltblown.
  • applicator methods including slot coating, non-contact coating, comb shim coating, spraying including, e.g., spiral spraying and random spraying, screen printing, foaming (e.g. using chemical foaming agents or a Nordson FoamMelt® Dispensing System), engraved roller, gravure roller, extrusion and meltblown.
  • the elastic hot melt adhesive can be applied to one substrate.
  • the elastic hot melt adhesive can be applied to the first substrate and then contacted by the second substrate to form the bonded region. Pressure,tension and/or line speed can be used to aid in forming the bonded region.
  • the bonded regions can be formed within a disposable article manufacturing process. Alternatively, the bonded regions are formed prior to the disposable article manufacturing process.
  • the elastic hot melt adhesive can be a pressure sensitive (i.e. exhibit tack at room temperature) hot melt adhesive.
  • the elastic hot melt adhesive composition can be light in color and can have good thermal stability. In a cooled film, the hot melt adhesive can be clear i.e. translucent or alternatively the hot melt adhesive can be opaque.
  • the elastic hot melt adhesive can have an Initial Molten Gardner Color after manufacturing of less than about 3, or even less than about 2. Alternately, the elastic hot melt adhesive can be pigmented to an opaque color such as e.g. pink, blue, white, gray, etc.
  • the elastic hot melt adhesive composition has low viscosity at application temperature.
  • the viscosity is no greater than about 15,000 cps at around 177°C (350°F), no greater than about 10,000 cps at around 177°C (350° F), no greater than about 7,500 cps at around 177°C (350°F), or even no greater than about 5,000 cps at 177°C (350°F).
  • the elastic hot melt adhesive composition gives a set after 50% hysteresis of no greater than about 20%, no greater than about 12%, no greater than about 10% or even no greater than about 8% when tested according to the 2-Peak Hysteresis Test Method.
  • the elastic hot melt adhesive composition provides good adhesion when tested according to the Peel Force Test Method.
  • the elastic hot melt adhesivecan have a peel adhesion of greater than about 100 grams, greater than about 200 grams, or even greater than about 300 grams.
  • the elastic hot melt adhesive composition can include one or more styrene block copolymers, a tackifying agent, and greater than about 15% by weight of a plasticizer.
  • the elastic hot melt adhesivecomposition can have a viscosity curve with a Viscosity Ratio (i.e. Viscosity @ 149°C(300°F) (cpsVViscosity @ 177°C(350°F ) that is less than about 7, less than about 6, less than about 5, or even less than about 4.
  • Viscosity Ratio i.e. Viscosity @ 149°C(300°F) (cpsVViscosity @ 177°C(350°F ) that is less than about 7, less than about 6, less than about 5, or even less than about 4.
  • a low viscosity ratio can indicate improved machining at high line speeds as the hot melt adhesive does not gain viscosity as quickly as it cools.
  • the elastic hot melt adhesive composition can include a tackifying agent with at least some aromatic content and a plasticizer such as naphtheiiic oil.
  • the elastic hot melt adhesive includes one or more styrene block copolymers.
  • a styrene block copolymer includes an aromatic vinyl polymer block and a conjugated diene polymer block, a hydrogenated conjugated diene polymer block, or a combination thereof.
  • the blocks can be arranged in a variety of configurations including, e.g., linear, branched, radial, star block, and combinations thereof.
  • the aromatic vinyl polymer block can be derived from a variety of aromatic vinyl compounds including, e.g., styrene, alpha-methylstyrene, beta- methylstyrene, 0-, m-, p-methylstyrene, t-butylstyrene, 2,4,6-trimethylstyrene,
  • the diene polymer block can be derived from a variety of diene-containing compounds including, e.g., isoprene, butadiene, hexadiene, 2,3-dimethyl-l ,3-butadiene, 1,3-pentadiene, and hydrogenated versions thereof, and combinations thereof.
  • Useful styrene block copolymers include, e.g., dib!ock, triblock and muitiblock copolymers including, e.g., styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene, styrene-isoprene-styrene, styrene-ethylene/hutene, styrene-ethylene/butene-styrene, styrene- ethylene/propylene, styrene-elhylene/propylene-styrene, styrene-ethylene-ethylene/propylene- styrene, and combinations thereof.
  • the one or more styrene block copolymers have an average styrene content of at least about 30%, at least about 35%, at least about 40%, or even from about 35% to about 45% by weight.
  • a hot melt composition comprises two styrene block copolymers A and B.
  • Polymer A is present at 25 weight % with a styrene content of 35% and polymer B is present at 25 weight % with a styrene content of 45 weight %.
  • the one or more styrene block copolymers have an average Melt Flow Rate (MFR) according to ASTM D 1238 (200°C/5 kg) in dg/min of no less than about 20, no less than about 25, or even no less than about 30.
  • MFR Melt Flow Rate
  • the elastic hot melt adhesivecan include at least one styrene block copolymer with a styrene content of at least about 40% by weight.
  • the composition has a total styrene block copolymer content of greater than 40 % by weight, greater than 45 % by weight, from about 30% to about 60 % by weight, from about 35%» to about 55% by weight, or even from about 40% to about 50 % by weight.
  • the styrene block copolymers can be pure tri-block copolymers containing no di-block. Alternately, the styrene block copolymer can include a portion of di-block. The styrene block copolymer can include diblock content of greater than 30 %.
  • KRATON FG 1901 G Linear, styrene-ethylene/ ' butylene-styrene, 30 wt% styrene, with 1.7% bound maleic anhydride
  • KRATON POLYMERS U.S. LLC Houston, Texas
  • the elastic hot melt adhesivecan include a tackifying agent.
  • the tackifying agent can be fluid or solid at room temperature.
  • Suitable classes of tackifying agents include, e.g., aromatic, aliphatic and cycloaliphatic hydrocarbon resins, mixed aromatic and aliphatic modified hydrocarbon resins, aromatic modified aliphatic hydrocarbon resins, and hydrogenated versions thereof; terpenes, modified terpenes and hydrogenated versions thereof; natural rosins, modified rosins, rosin esters, and hydrogenated versions thereof; low molecular weight polylactic acid; and combinations thereof.
  • Examples of useful natural and modified rosins include gum rosin, wood rosin, tall oil rosin, distilled rosin, hydrogenated rosin, dimerized rosin and polymerized rosin.
  • Examples of useful rosin esters include e.g., glycerol esters of pale wood rosin, glycerol esters of hydrogenated rosin, glycerol esters of polymerized rosin, pentaerythritol esters of natural and modified rosins including pentaerythritol esters of pale wood rosin, pentaerythritol esters of hydrogenated rosin, pentaerythritol esters of tall oil rosin, and phenolic-modified pentaerythritol esters of rosin.
  • Useful tackifying agents are commercially available under a variety of trade designations including, e.g., the ESCOREZ series of trade designations from Exxon Mobil Chemical Company (Houston, Texas) including ESCOREZ 5400 (1% aromatic content), ESCOREZ 5600 (9,8% aromatic content), ESCOREZ 5690 (10% aromatic content), ESCOREZ 5615 (9.9% aromatic content), the EASTOTAC series of trade designations from Eastman Chemical (Kingsport, Tennessee) including EASTOTAC H-100R and EASTOTAC H-I OOL, and the WINGTACK series of trade designations from Cray Valley HSC (Exton, Pennsyl vania) including WINGTACK 86, WINGTACK EXTRA, and WINGTACK 95 and the PICCOTAC and KRISTALEX series of trade designations from Eastman Chemical Company (Kingsport, Tennessee) including, e.g., PICCOTAC 8095 and KRISTALEX 3100.
  • the elastic hot melt adbesivecan be free from end block resin that has a melting point greater than about 130°C.
  • the elastic hot melt adhesivecomposition can include at least one tackifying agent with aromatic content.
  • the tackifying agent can have an aromatic content of greater than 5%, greater than 20%, greater than 50%, from about 5% to about 20% by weight, or even from about 8% to about 15% by weight.
  • the composition can include a tackifying agent with a melt point of less than 100°C, or even less than 95°C.
  • the elastic hot melt adhesivecomposition can include at least about 20 % by weight, at least about 25 % by weight, from about 10 % by weight to about 50 % by weight, from about 15 %> by weight to about 40 % by weight, or even from about 20 % by w r eight to about 37 % by weight tackifying agent.
  • the elastic hot melt adhesivecomposition can include a plasticizer.
  • Suitable plasticizers include, e.g., naphthenic oils, paraffinic oils (e.g., cycloparaffin oils), mineral oils, phthalate esters, adipate esters, olefin oligomers (e.g., oligomers of polypropylene, polybutene, and hydrogenated polyisoprene), polybutenes, polyisoprene, hydrogenated polyisoprene, polybutadiene, benzoate esters, animal oil, plant oils (e.g. castor oil, soybean oil (e.g. high oleic soy oil), derivatives of oils, glycerol esters of fatty acids, polyesters, polyethers, lactic acid derivatives and combinations thereof.
  • paraffinic oils e.g., cycloparaffin oils
  • mineral oils phthalate esters
  • adipate esters e.g., olefin oligo
  • plasticizers include CALSOL 550 naphthenic oil from Calumet Specialty Products Partners, LP (Indianapolis, Indiana), KAYDOL OIL mineral oil from Sonnebom (Tarrytown New York) PARAPOL polvbutene from Exxon Mobil Chemical Company (Houston, Texas), OPPANQL polyisobutylene from BASF (Ludwigsjhafen,
  • the plasticizer can be a naphthenic oil. Alternately, the plasticizer includes aromatic or naphthenic groups.
  • the plasticizer can be present in the elastic hot melt adhesivecomposition in an amount of at least about 10%, at least about 15 % by weight, at least about 18% by weight, from about 10 % to about 30%) by weight, or even from about 15% to about 25% by weight.
  • the elastic hot melt adhesivecomposition can include a wax.
  • Useful classes of wax include, e.g., paraffin waxes, macrocrystalline waxes, high density low molecular weight polyethylene waxes, by-product polyethylene waxes, polypropylene waxes, Fischer-Tropsch waxes, oxidized Fischer-Tropsch waxes, functionalized waxes such as acid, anhydride, and hydroxy modified waxes, animal waxes, vegetable waxes (e.g. soy wax) and combinations thereof.
  • Useful waxes are solid at room temperature and preferably have a Ring and Ball softening point of from 50°C to 170°C.
  • EPOLENE N and C series of trade designations from Westlake Chemical Corporation ( Houston, Texas) including e.g. EPOLENE N-21 and the LICOCENE series of trade designations from Clariant International Ltd. (Muttenz, Switzerland) including e.g. TP
  • the elastic hot melt adhesive composition can include no greater than about 8%» by weight, no greater than about 5% by weight, from about 1% by weight to about 7.5 % by weight, or even from about 1% to about 5% by weight wax.
  • the elastic hot melt adhesive composition optionally includes additional components including but not limited to, e.g., foaming agents, stabilizers, antioxidants, additional polymers (e.g. olefin based polymers (e.g. propylene homopolymers, propylene copolymers, ethylene homopolymers, ethylene copolymers,, functionalized polymers such as acid, anhydride, and hydroxy modified polymers), amorphous poly-alpha olefins, polyethylene copolymers), adhesion promoters, ultraviolet light stabilizers, corrosion inhibitors, odor absorbers/neutralizers, colorants (e.g., pigments (e.g.
  • fillers e.g. na.no particles, calcium carbonate, clay, talc, fumed silica
  • surfactants e.g. na.no particles, calcium carbonate, clay, talc, fumed silica
  • wetness indicators e.g. na.no particles, calcium carbonate, clay, talc, fumed silica
  • surfactants e.g. na.no particles, calcium carbonate, clay, talc, fumed silica
  • wetness indicators e.g. na.no particles, calcium carbonate, clay, talc, fumed silica
  • surfactants e.g
  • the hot melt adhesive comprises from about 0.1 to about 2,0 % by weight pigment, or even from about 0.1 to about 0.5% by weight pigment,
  • Useful antioxidants include, e.g., pentaerythritol tetrakis[3,(3,5-di-tert-butyl-4- hydroxyphenyl)propionate] , 2,2'-methylene bis(4-methyl ⁇ 6-tert-butylphenol), phosphites including, e.g., tris-(p-nonySphenyS)-phosphite (TNPP) and bis(2,4-di-tert ⁇ hutySphenyS)4,4' ⁇ diphenylene-diphosphonite, di-stearyl-3,3'-thiodipropionate (DSTDP), and combinations thereof.
  • TNPP tris-(p-nonySphenyS)-phosphite
  • DSTDP di-stearyl-3,3'-thiodipropionate
  • U seful antioxidants are commercially available under a variety of trade designations including, e.g., the IRGANOX series of trade designations including, e.g., IRGANOX 1010, IRGANOX 565, and IRGANOX 1076 hindered phenolic antioxidants and IRGAFOS 168 phosphite antioxidant, all of which are available from BASF Corporation (Florham Park, New Jersey), and ETHYL 702 4,4'-methylene bis(2,6-di-tert-butylphenol).
  • the elastic hot melt adhesive composition preferably includes from about 0.1 % by weight to about 2 % by weight antioxidant.
  • the bonded regions of this invention can be incorporated into any suitable disposable article including personal care garments, medical garments and industrial worker garments.
  • the bonded regions of this invention are useful in a variety of applications and constructions to improve comfort and fit including e.g., disposable absorbent articles including, e.g., diapers, training paints, swim wear, absorbent undergarments (e.g. adult incontinence products), sanitary napkins, medical dressings (e.g., wound care products and bandages), surgical pads, medical gowns, caps, gloves, drapes, face masks, laboratory coats, coveralls, meat-packing products, and components of absorbent articles including, e.g., an absorbent element, absorbent cores, impermeable layers (e.g., backsheets), tissue (e.g., wrapping tissue), acquisition layers and woven and nonwoven web layers (e.g., top sheets, absorbent tissue).
  • absorbent articles including, e.g., diapers, training paints, swim wear, absorbent undergarments (e.g. adult incontinence products), sanitary napkins, medical dressings (e.g., wound care products and bandages
  • the bonded regions of this invention are useful for elasticizing many areas of disposable absorbent articles including leg cuffs, waist portions, belly bands, side panels and fastening tabs/ears.
  • the el astic composite of this in vention can further be used to ei asticize any portion of the disposable article or even the entire disposable article.
  • the adjacent bonded regions of this invention are useful in elasticizing the fastening tab/ear of a disposable absorbent article.
  • the fastening tab (21) comprises three adjacent bonded regions.
  • Each bonded region comprises a first and second substrate and a hot melt adhesive composition between the first and second substrates thereby bonding the first and second substrates together.
  • the elastic region comprises an elastic hot melt adhesive.
  • the second bonded region can comprise a second hot melt adhesive.
  • the elastic region allows the fastening tab area to stretch while the second bonded regions can add strength to the fastening tab area.
  • the second hot melt adhesive can be stiffer (i.e. have a higher modulus) than the elastic hot melt adhesive.
  • the hot melt adhesives can applied using two or more different coating heads using a slot coating or non-contact coating application to one substrate, forming a series of side by side continuous films that can be used to bond the first and second substrates together and create the bonded regions.
  • three coating heads (42) are used to apply 3 adjacent adhesive regions (44), that slightly overlap each other, to a substrate (49).
  • the adjacent bonded regions of this invention can be useful in creating absorbent undergarments that have the feel and stretch of cotton while being capable of absorbing body fluids.
  • the absorbent undergarment (5) includes adjacent bonded regions that are present in a vertical stripe pattern throughout the absorbent article, elastic regions (7) alternating with second bonded regions (9). These vertical stripes can be more like a pin stripe; alternatively the vertical stripes can be wider. Individual stripes may be of the same or differing widths.
  • the vertical stripes can have a width of from about 1 mm to about 100 mm, from about 1 mm to about 50 mm or even from about 2-25 mm.
  • the second bonded regions can comprise a second hot melt adhesive that introduces certain properties into the disposable absorbent article.
  • the second hot melt adhesive can provide breathability, cohesion, stiffness, and/or lower creep, in one embodiment, breathability is introduced by coating one or both hot melt adhesives in a discontinuous manner.
  • Composition amounts in tables are all in weight %.
  • Viscosity is determined in accordance with ASTM D-3236 entitled, "Standard Test Method for Apparent viscosity of Adhesives and Coating Materials,” (October 31, 1988), using Brookfield Thermosel viscometer Model RVDV 2 and a number 27 spindle, The results are reported in centipoise (cps).
  • the hot melt adhesive is tested (in the molten state) to determine Molten Gardner Color by comparing the color of the sample against the Gardner Col or Standards as set forth in ASTM D-1544. The comparison is made using a Gardner Delta Comparator equipped with an
  • Test laminations were prepared by continuous slot coating the elastic hot melt adhesive composition between two nonwoven* substrates at an application temperature of 177°C(350'T), a nip pressure of 10.5 Newtons/centimeter (N/cms) (6 pounds per linear inch (PL!), and a run speed of at least 6.1 meters/min (m/min) (20 feet/min).
  • Laminations were prepared with an adhesi ve coat w eight of 100 grams per square meter (gsm) and the width of the adhesive was at least 7.6 cms (3 inches).
  • a sufficient amount of laminate was prepared such that at least 1.5 m (60 inches) of representati ve lamination was coll ected for testing.
  • the nonwoven used is carded, hydroentangled and comprises 50/50 (PET/PP). it has a basis weight of
  • Test laminates were prepared by coating elastic hot melt adhesive between two substrate according to the Test Lamination Preparation method above. Peel force is determined using
  • test Method "" with the exception that the test is run at a rate of 30.5 cms per minute ( 12 inches per minute), instead of 25.4 cms per minute (10 in per minute), over a period of 10 seconds, and
  • Test laminates were prepared by coating elastic hot melt adhesive between two substrates according to the Test Lamination Preparation method above. Test samples are prepared by cutting the laminates in cross-web direction, with 1 inch in width and at least 3 inches in length. The test is conducted at least 24 hours after the non- woven laminate is prepared.
  • the strips prepared are extended to a certain strain (e.g. 50%, 100 %, 150% or 200%) and then retracted to their original dimension. Subsequently the specimen goes through a second extension-retraction cycle with the same deformation.
  • the cross head speed is set to 50.8 cms per minute (20 inches per minute). There is no holding time between extension and retraction.
  • the samples are run on an INSTRON type-test instrument with at least 3 replicates.
  • the permanent set after each cycle is determined by the tensile strain on the retraction curve where the tensile stress reduces to 5 gram force. The peak load/stress at maximum deformation and percent energy loss between each cycles are also recorded.
  • Comparative I and 2 are compositions outside of the inventive ranges. Both have a viscosity at 177°C (350°F) of greater than 15,000 cps and would not be expected to apply well on a high speed production line.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Hematology (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Nonwoven Fabrics (AREA)
  • Polymers & Plastics (AREA)
  • Adhesive Tapes (AREA)
  • Medicinal Chemistry (AREA)
  • Details Of Garments (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
PCT/US2015/049186 2014-09-09 2015-09-09 A disposable article including at least one elastic bonded region Ceased WO2016040483A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP15766716.3A EP3191045B1 (en) 2014-09-09 2015-09-09 A disposable article including at least one elastic bonded region
CN201580047864.1A CN106794093A (zh) 2014-09-09 2015-09-09 包括至少一个弹性粘结区域的一次性制品
JP2017533171A JP6910297B2 (ja) 2014-09-09 2015-09-09 少なくとも１つの弾性結合領域を含む使い捨て物品
KR1020177005708A KR20170051432A (ko) 2014-09-09 2015-09-09 적어도 하나의 탄성 접합 영역을 포함하는 일회용 물품
MX2017002983A MX369600B (es) 2014-09-09 2015-09-09 Un articulo desechable que incluye por lo menos una region elastica unida.
ZA2017/00967A ZA201700967B (en) 2014-09-09 2017-02-08 A disposable article including at least one elastic bonded region
CONC2017/0002333A CO2017002333A2 (es) 2014-09-09 2017-03-09 Un artículo desechable que incluye por lo menos una región elástica unida

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US201462048047P 2014-09-09 2014-09-09
US201462048066P 2014-09-09 2014-09-09
US62/048,066 2014-09-09
US62/048,047 2014-09-09
US201562171129P 2015-06-04 2015-06-04
US62/171,129 2015-06-04

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Title
"Standard Test Method for Apparent viscosity of Adhesives and Coating Materials", ASTM D-3236, 31 October 1988 (1988-10-31)

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