WO2016040474A1 - An elastic hot melt adhesive composition and an elastic composite made with the same - Google Patents

An elastic hot melt adhesive composition and an elastic composite made with the same Download PDF

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Publication number
WO2016040474A1
WO2016040474A1 PCT/US2015/049176 US2015049176W WO2016040474A1 WO 2016040474 A1 WO2016040474 A1 WO 2016040474A1 US 2015049176 W US2015049176 W US 2015049176W WO 2016040474 A1 WO2016040474 A1 WO 2016040474A1
Authority
WO
WIPO (PCT)
Prior art keywords
hot melt
melt adhesive
weight
adhesive composition
elastic composite
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/US2015/049176
Other languages
English (en)
French (fr)
Inventor
David B. Malcolm
Kevin P. Davis
Yuanyan GU
Peter Remmers
Thomas Wittkopf
Kristy J. Beckman
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 MX2017002984A priority Critical patent/MX369599B/es
Priority to KR1020177005707A priority patent/KR20170052579A/ko
Priority to CN201580047869.4A priority patent/CN106687082B/zh
Priority to JP2017513060A priority patent/JP6707529B2/ja
Priority to EP15766715.5A priority patent/EP3191044B1/en
Publication of WO2016040474A1 publication Critical patent/WO2016040474A1/en
Priority to ZA2017/00966A priority patent/ZA201700966B/en
Priority to CONC2017/0002335A priority patent/CO2017002335A2/es
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • 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 the core stabilization (e.g. applying a hot melt adhesive to the absorbent core to increase 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 both the elastic material and the adhesive layers to form a simplified 3-layer elastic composite that can impart stretch to various portions of the disposable article.
  • the invention includes an elastic composite including a first and second substrate; and a hot melt adhesive composition between the first and second substrates thereby permanently bonding the first and second substrates to each other and providing elasticity in the bonded area, said hot melt adhesive composition including about 35% 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 15 % of a plasticizer and, a tackifying agent; wherein the hot melt adhesive composition has a viscosity of less than about 15,000 cps at 350°F.
  • the elastic composite includes a hot melt adhesive composition with a viscosity of less than about 10,000 cps at 350°F.
  • the one or more styrene block copolymers have an average styrene content of at least about 35% by weight.
  • the elastic composite includes a hot melt adhesive composition includes from about 25 % by weight to about 40% by weight tackifying agent.
  • the elastic composite includes a hot melt adhesive composition comprises at least one tackifying agent with a melt point of less than 100 °C.
  • elastic composite includes a first and second substrate that are nonwoven.
  • the nonwoven is airlaid, carded and hydroentangled.
  • the nonwoven is extensible to greater than 100% in the cross web direction.
  • the hot melt adhesive of the elastic composite is applied to the substrate using an applicator method selected from the group consisting of slot and non contact coating.
  • the hot melt adhesive is applied to the substrate using an applicator method selected from the group consisting of screen printing, spraying, comb shim slot and gravure roll.
  • a disposable article that includes the elastic composite.
  • the elastic composite is used in an application selected from the group consisting of ear, waist band, belly band and side panel.
  • the disposable article is selected from the group consisting of diaper, adult incontenence product, feminine hygiene product and medical bandage.
  • the invention includes a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 35% 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 35% and an average MFR (200°C/5 kg) of no less than about 20, greater than about 15% plasticizing oil and, a tackifying agent where the adhesive composition has a viscosity of less than about 15,000 cps at 350°F.
  • a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 35% 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 35% and an average MFR (200°C/5 kg) of no less than about 20, greater than about 15% plasticizing oil and, a t
  • the hot melt adhesive composition has a Viscosity Ratio ( Viscosity @ 300°F (cps)/Viscosity @ 350°F) of no greater than about 5.
  • the tackifying agent is a hydrocarbon resin with about 5% to about 20% by weight of aromatic content and the plasticizing oil is a naphthenic oil.
  • the invention includes a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 40% to about 55% 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 35% and an average MFR (200°C/5 kg) of no less than about 20, from about 15% to about 30% of a naphthenic plasticizing oil and, from about 30% to about 40% by weight of an aromatic modified hydrocarbon resin where the adhesive composition has a viscosity of less than about 15,000 cps at 350° F.
  • a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 40% to about 55% 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 35% and an average MFR (200°C/5 kg) of no
  • At least one of the styrene block copolymers has a diblock content of greater than about 30 % by weight.
  • 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
  • the elastic composite includes a substrate, and a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 35% 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 35% and an average MFR (200°C/5 kg) of no less than about 20, greater than about 15% plasticizing oil and, a tackifying agent where the adhesive composition has a viscosity of less than about 15,000 cps at 350°F and wherein the hot melt adhesive provides elasticity to the bonded area.
  • a hot melt adhesive composition that can be used to create a bonded, elasticized region, including from about 35% 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 35% and an average MFR (200°C/5
  • compositions that can be used to form elastic composites that are useful in disposable articles (e.g. disposable absorbent articles).
  • the compositions have good elastic recovery and high peel adhesion and have a viscosity of less than about 15,000 cps at 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 elastic composite can include a first substrate and a hot melt adhesive composition.
  • the hot melt adhesive composition imparts elasticity to the first substrate.
  • the elastic composite can include a first substrate, a second substrate and a hot melt adhesive composition.
  • the 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.
  • At least one of the substrates is selected from the group consisting of nonwoven and polymer film.
  • the nonwoven can be an elastic nonwoven (e.g. core and shell type).
  • the nonwoven can contain fibers made from one or more polymers (e.g. PET (polyethylene terephthalate), PBT (polybutylene 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, spunbound 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 polymer film can be selected from the group consisting of polyethylene, polypropylene, polyethylene copolymers, polypropylene copolymers, and PET.
  • the first and second substrates can be nonwoven.
  • the nonwoven can have a basis weight of less than 40 grams per square meter (gsm), 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.
  • 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 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 Nordson FoamMelt® Dispensing equipment), 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 Nordson FoamMelt® Dispensing equipment), engraved roller, gravure roller, extrusion and meltblown.
  • the hot melt adhesive can be applied to one substrate.
  • the hot melt adhesive can be applied to the first substrate and then contacted by the second substrate to form the composite.
  • Pressure,tension and/or line speed can be used to aid in forming the bonded composite.
  • the composite can be formed within a disposable article manufacturing process. Alternatively, the composite is formed prior to the disposable article manufacturing process.
  • the elastic composite is formed by applying the hot melt adhesive using a discontinuous application method.
  • the hot melt adhesive application method can be selected from the group consisting of comb shim coating and spraying. Alternatively, any other method of coating could be used to give a discontinuous coating.
  • the bonded elastic region alternates with an area free of adhesive in a vertical stripe pattern throught the absorbent article. These vertical stripes can be more like a pin stripe.
  • the bonded elastic region is a 2 to about 10 mm wide stripe and the area free of adhesive is a 0.5 to about 5 mm wide stripe, or even a 0.5 to about 3 mm wide strip. Having areas free of adhesive, or using a discontinuous method of hot melt adhesive application to form the elastic composite can be useful to give breathability to the composite.
  • the hot melt adhesive can be a pressure sensitive adhesive (i.e. have some tack at room temperature).
  • the hot melt adhesive composition can be light in color and can have good thermal stability.
  • the hot melt adhesive can be clear i.e. translucent or alternatively the hot melt adhesive can be opaque.
  • the hot melt adhesive can have an initial Molten Gardner Color after manufacturing of less than about 3, or even less than about 2.
  • the hot melt adhesive can be pigmented to an opaque color such as e.g. pink, blue, white, gray, etc.
  • the hot melt adhesive composition has low viscosity at application temperature.
  • the viscosity can be 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 hot melt adhesive composition gives a set after 50% hysterisis of no more than about 20%, no more than about 12%, no more than about 10% or even no more than about 8% when tested according to the 2- Peak Hysterisis Test Method..
  • the hot melt adhesive composition provides good adhesion when tested according to the Peel Force Test Method.
  • the hot melt adhesive has peel adhesion of greater than about 100 grams/inch, greater than about 200 grams/inch , or even greater than about 300 grams/inch.
  • the hot melt adhesive composition includes one or more styrene block copolymers, a tackfying agent, and greater than about 15% by weight of a plasticizer.
  • the hot melt adhesive composition can have a viscosity curve with a Viscosity Ratio ( Viscosity @149°C(300°F) (cps)/Viscosity @177°C (350°F)) that is no greater than about 7.5, no greater than about 6, no greater than about 5, or even no greater than about 4.
  • Viscosity Ratio Viscosity @149°C(300°F) (cps)/Viscosity @177°C (350°F)
  • a low viscosity ratio can indicate improved machining at high line speeds as the hot melt adhesive gains iscosity more slowly as it cools.
  • the hot melt adhesive composition can include a tackifying agent with at least some aromatic content and a naphthenic oil.
  • the 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, o-, m-, p-methylstyrene, t-butylstyrene, 2,4,6- trimethylstyrene, monofluorostyrene, difluorostyrene, monochlorostyrene, dichlorostyrene, methoxystyrene, 1,3-vinylnaphthalene, vinylanthracene, indene, acenaphthylene, and combinations thereof.
  • aromatic vinyl compounds including, e.g., styrene, alpha- methylstyrene, beta-methylstyrene, o-, 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-1,3- butadiene, 1,3-pentadiene, and hydrogenated versions thereof, and combinations thereof.
  • Useful styrene block copolymers include, e.g., diblock, triblock and multiblock copolymers including, e.g., styrene-butadiene, styrene-butadiene-styrene, styrene-isoprene, styrene-isoprene-styrene, styrene-ethylene/butene, styrene-ethylene/butene-styrene, styrene- ethylene/propylene, styrene-ethylene/propylene-styrene, styrene-ethylene-ethylene/propylene- styrene, farnesene styrene and combinations thereof and hydrogenated or functionalized versions 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
  • 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 dg/min, no less than about 25 dg/min, or even no less than about 30 dg/min.
  • MFR Melt Flow Rate
  • the hot melt adhesive can 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 35% to about 60 % 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 %.
  • the hot melt adhesive includes 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-100L, and the WINGTACK series of trade designations from Cray Valley HSC (Exton, Pennsylvania) 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 hot melt adhesive can be free from end block resin that has a melting point greater than about 110°C, greater than about 120°C, or even greater than about 130°C.
  • the hot melt adhesive composition 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 7.5% to about 15% by weight.
  • the aromatic content is measured by Nuclear Magnetic Resonance (NMR) spectroscopy.
  • the composition can include a tackifying agent with a melt point of less than 100°C, or even less than 95°C.
  • the hot melt adhesive composition 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 weight to about 37 % by weight tackifying agent.
  • PLASTICIZER
  • the hot melt adhesive composition includes 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 oligomers (e
  • plasticizers include CALSOL 550 naphthenic oil from Calumet Specialty Products Partners, LP (Indianapolis, Indiana), KAYDOL OIL mineral oil from Sonneborn (Tarrytown New York) PARAPOL polybutene from Exxon Mobil Chemical Company (Houston, Texas), OPPANOL polyisobutylene from BASF (Ludwigsjhafen, Germany), KRYSTOL 550 mineral oil from Petrochem Carless Limited (Surrey, England), PURETOL 35 and 15 both mineral oils from Petro Canada Lubricants Inc. (Mississauga, Ontario) and PLENISH from Pioneer Dupont.
  • CALSOL 550 naphthenic oil from Calumet Specialty Products Partners, LP (Indianapolis, Indiana), KAYDOL OIL mineral oil from Sonneborn (Tarrytown New York) PARAPOL polybutene from Exxon Mobil Chemical Company (Houston, Texas), OPPANOL polyisobutylene from BASF (Ludwigsj
  • the plasticizer can be a naphthenic oil. Alternately, the plasticizer includes aromatic or naphthenic groups.
  • the plasticizer is present in the hot melt adhesive composition in an amount of 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 hot melt adhesive composition can include a wax.
  • useful classes of wax include, e.g., paraffin waxes, microcrystalline 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 LICOCENE PP 6102.
  • the hot melt adhesive composition can include no greater than about 8.0 % 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 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, etc.), functionalized polymers such as acid, anhydride, and hydroxy modified polymers), amorphous poly-alpha olefins), adhesion promoters, ultraviolet light stabilizers, corrosion inhibitors, odor absorbers/neutralizers, colorants (e.g., pigments (e.g. titanium dioxide, carbon black, and mixtures thereof) and dyes), fragrances, fillers (e.g.
  • foaming agents e.g., foaming agents, stabilizers, antioxidants, additional polymers (e.g. olefin based polymers (e.g. propylene homopolymers, propylene copolymers, ethylene homopoly
  • the hot melt adhesive can comprise from about 0.05 to about 2.0 % by weight pigment, or even from about 0.05 to about 0.5% 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-nonylphenyl)-phosphite (TNPP) and bis(2,4-di-tert-butylphenyl)4,4'- diphenylene-diphosphonite, di-stearyl-3,3'-thiodipropionate (DSTDP), and combinations thereof.
  • TNPP tris-(p-nonylphenyl)-phosphite
  • DSTDP diphenylene-diphosphonite
  • DSTDP di-stearyl-3,3'-thiodipropionate
  • the hot melt adhesive composition preferably includes from about 0.1 % by weight to about 2 % by weight antioxidant.
  • hot melt adhesive compositions and elastic composites of this invention can be incorporated into any suitable article including personal care garments, medical garments and industrial worker garments.
  • the elastic composite of this invention is 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 underpants, 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 underpants, adult incontinence products, sanitary napkins, medical dressings (e.g., wound care products and bandages), surgical pads, medical gowns, caps
  • the elastic composite of this invention is useful for elasticizing many areas of disposable articles including leg cuffs, waist portions, belly bands, side panels and fastening tabs/ears.
  • the elastic composite of this invention can further be use to elasticize any portion of the disposable article, one or more portions of the disposable article, or even the entire disposable article.
  • 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 a Brookfield Thermosel viscometer Model RVDV 2 and a number 27 spindle. The results are reported in centipoise (cps). Molten Gardner Color
  • 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 Color Standards as set forth in ASTM D-1544. The comparison is made using a Gardner Delta Comparator equipped with an Illuminator available from Pacific Scientific (Bethesda, Maryland). Test Lamination Preparation
  • 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(350oF), a nip pressure of 10.5 Newtons/centimeter (N/cms) (6 pounds per linear inch (PLI)), and a run speed of at least 6.1 meters/min (m/min) (20 feet/min).
  • Laminations were prepared with an adhesive coat weight 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 representative lamination was collected for testing.
  • Test laminates were prepared by coating adhesive between two substrates according to the Test Lamination Preparation method above. Peel force is determined using ASTM
  • Test laminates were prepared by coating 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 when 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 1 and 2 are compositions outside of the inventive ranges (Comparative 1 has less than 15% plasticizer and Comparative 2 has a styrene block copolymer with an average MFR of 12 dg/min. Both have a viscosity at 350°F of greater than 15,000 cps). Both would be expected not to apply well on a high speed production line.

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PCT/US2015/049176 2014-09-09 2015-09-09 An elastic hot melt adhesive composition and an elastic composite made with the same Ceased WO2016040474A1 (en)

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MX2017002984A MX369599B (es) 2014-09-09 2015-09-09 Una composicion de adhesivo termofusible elastico y un material compuesto elastico elaborado con esta.
KR1020177005707A KR20170052579A (ko) 2014-09-09 2015-09-09 탄성 핫 멜트 접착제 조성물 및 그로 제조된 탄성 복합재
CN201580047869.4A CN106687082B (zh) 2014-09-09 2015-09-09 弹性热熔粘合剂组合物及用其制备的弹性复合物
JP2017513060A JP6707529B2 (ja) 2014-09-09 2015-09-09 弾性ホットメルト接着剤組成物及びそれと共に製造される弾性複合材料
EP15766715.5A EP3191044B1 (en) 2014-09-09 2015-09-09 An elastic hot melt adhesive composition and an elastic composite made with the same
ZA2017/00966A ZA201700966B (en) 2014-09-09 2017-02-08 An elastic hot melt adhesive composition and an elastic composite made with the same
CONC2017/0002335A CO2017002335A2 (es) 2014-09-09 2017-03-09 Una composición de adhesivo termofusible elástico y un material compuesto elástico elaborado con esta

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PCT/US2015/049186 Ceased WO2016040483A1 (en) 2014-09-09 2015-09-09 A disposable article including at least one elastic bonded region
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CN112236496A (zh) * 2018-06-04 2021-01-15 积水富乐株式会社 热熔组合物
CN112236496B (zh) * 2018-06-04 2022-08-30 积水富乐株式会社 热熔组合物

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EP3191044B1 (en) 2019-11-06
CO2017002335A2 (es) 2017-06-09
US10265225B2 (en) 2019-04-23
WO2016040495A1 (en) 2016-03-17
JP6910297B2 (ja) 2021-07-28
KR20170051432A (ko) 2017-05-11
EP3191045A1 (en) 2017-07-19
CN106687082B (zh) 2021-03-09
MX2017002984A (es) 2017-09-01
ZA201700967B (en) 2019-06-26
EP3191044A1 (en) 2017-07-19
MX369600B (es) 2019-11-13
JP6707529B2 (ja) 2020-06-10
JP2017529210A (ja) 2017-10-05
MX369599B (es) 2019-11-13
JP2017534481A (ja) 2017-11-24
JP2017534413A (ja) 2017-11-24
KR20170052579A (ko) 2017-05-12
US20160067116A1 (en) 2016-03-10
CN106687082A (zh) 2017-05-17
MX2017002983A (es) 2017-05-30
CO2017002333A2 (es) 2017-06-20
MX2017002982A (es) 2017-05-30
EP3191045B1 (en) 2019-11-06
WO2016040483A1 (en) 2016-03-17
US20160068721A1 (en) 2016-03-10
CN106794093A (zh) 2017-05-31
CN107072827A (zh) 2017-08-18
EP3191043A1 (en) 2017-07-19
ZA201700966B (en) 2019-07-31
US20160067117A1 (en) 2016-03-10

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