WO1998029251A1 - Materiau composite elastique ameliore et procede de fabrication - Google Patents

Materiau composite elastique ameliore et procede de fabrication Download PDF

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Publication number
WO1998029251A1
WO1998029251A1 PCT/US1997/023825 US9723825W WO9829251A1 WO 1998029251 A1 WO1998029251 A1 WO 1998029251A1 US 9723825 W US9723825 W US 9723825W WO 9829251 A1 WO9829251 A1 WO 9829251A1
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WO
WIPO (PCT)
Prior art keywords
polymeric material
stress relaxation
composite elastic
facing
length
Prior art date
Application number
PCT/US1997/023825
Other languages
English (en)
Inventor
Oomman P. Thomas
James R. Fitts
Donald V. Willitts
Richard M. Shane
Jack D. Taylor
Original Assignee
Kimberly-Clark Worldwide, Inc.
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 Kimberly-Clark Worldwide, Inc. filed Critical Kimberly-Clark Worldwide, Inc.
Priority to AU57177/98A priority Critical patent/AU734540B2/en
Priority to BR9714298-0A priority patent/BR9714298A/pt
Priority to EP97953427A priority patent/EP0954442A1/fr
Priority to CA002273914A priority patent/CA2273914A1/fr
Publication of WO1998029251A1 publication Critical patent/WO1998029251A1/fr

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/02Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/12Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577Apparatus or processes for manufacturing
    • A61F13/15699Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
    • A61F13/49012Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region the elastic means being elastic panels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent 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
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/49007Form-fitting, self-adjusting disposable diapers
    • A61F13/49009Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49014Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the side panels
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/36Layered products comprising a layer of synthetic resin comprising polyesters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/40Layered products comprising a layer of synthetic resin comprising polyurethanes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/144Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A61F2013/51322Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability being elastomeric or stretchable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/514Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51409Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film
    • A61F2013/51429Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film being elastomeric or stretchable sheet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/726Permeability to liquids, absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2367/00Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2375/00Polyureas; Polyurethanes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00Personal care
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2555/00Personal care
    • B32B2555/02Diapers or napkins

Definitions

  • the present invention relates to a composite elastic material having improved stress relaxation and improved dimensional stability.
  • This invention also relates to a method of manufacturing composite elastic materials that are dimensionally stable and latent and that have improved stress relaxation.
  • the present invention relates to a dimensionally stable and/or latent composite elastic material having improved stress relaxation and creep resistance and laminates thereof.
  • the present invention also relates to a method of manufacturing the same.
  • composite elastic material refers to a multicomponent or multilayer elastic material in which one layer is elastic.
  • a composite elastic material that is “dimensionally stable” is one that retains its dimensions, i.e., length and width, under actual use conditions. Use conditions generally involve body temperature, humidity and heat.
  • a “latent elastic laminate material” refers to a laminate material that has an elasticizable component that is dormant but that can be activated at will, normally using a stimulus such as heat. In other words, a latent elastic laminate material will become elastic when activated.
  • stress relaxation is defined as the load required to hold a constant elongation over a period of time.
  • creep is defined as the loss of shape or dimension of an article due to some irreversible flow or structural breakdown under a constant load or force.
  • creep There are two kinds of creep: (1 ) time-independent, in which the shape changes because of the irreversible flow or structural breakdown under a constant load or force and does not recover when the force is removed; and (2) time-dependent, wherein some of the shape recovers when the force is removed.
  • Composite elastic materials and laminates thereof have a wide variety of uses, especially in the areas of absorbent articles and disposable items.
  • absorbent articles refers to devices which absorb and contain body exudates and, more specifically, refers to devices that are placed against or in proximity to the body of the wearer to absorb and contain the various exudates discharged from the body.
  • absorbent articles is intended to include diapers, training pants, absorbent underpants, incontinence products and the like.
  • dispenser is used herein to describe absorbent articles not intended to be laundered or otherwise restored or reused as an absorbent article.
  • composite elastic material is a continuous filament-type structure in which a layer of continuous, generally parallel, elastic filaments are bonded to at least one facing layer using a heated calender roll and an anvil roll.
  • Continuous filament laminates are disclosed in U.S. Patent No. 5,366,793 to Fitts, Jr. et al. and U.S. Patent No. 5,385,775 to Wright, both of which are incorporated herein by reference in their entirety.
  • the calender roll is patterned in some way so that the resulting laminate material is not bonded across its entire surface.
  • the anvil roll may also be patterned if it is desired.
  • the maximum bond point surface area for a given area of surface on one side of the laminate generally will not exceed about 50% of the total surface area.
  • the percent bonding area varies from about 10% to about 30% of the area of the laminate material.
  • the present invention provides a process for producing a dimensionally stable and/or latent elastic laminate material.
  • the process includes the steps of providing a polymeric material having a first length, stretching the polymeric material to a second length and bonding at least one non-woven facing to the polymeric material in a calender having two smooth- surfaced rolls in order to reduce damage to the structure of the elastic material.
  • the present invention also provides a process wherein 100% of the surface area of the roll contacts the elastic material. The present invention, therefore, produces a single composite elastic material having minimal to negligible damage to the polymeric material by calendering a polymeric material and at least one non-woven facing between smooth-surfaced rolls.
  • the process of the present invention not only overcomes the problems of the prior art, but also provides several advantages. These include: (1 ) a substantial improvement in the performance of the resulting laminate via dimensional stability; (2) a reduced load loss over time under actual use conditions; (3) a possible cost reduction through the use of a lower amount of elastic material in the final laminate; (4) the production of latent and/or heat shrinkable materials; and (5) the use in the resulting laminate of the full potential of the elastic polymer.
  • the present invention also provides a method of manufacturing a low cost elastic non-woven material.
  • Composite elastic laminate materials produced according to the present invention may be used as elastic components of personal care absorbent articles such as, for example, in the side panels of diapers and training pants. They may also be used in the leg elastic and gasketing of diapers, training pants, incontinence devices and the like.
  • FIG. 1 is a schematic drawing of the process for forming a composite elastic material according to the present invention.
  • FIG. 2 is a perspective view of an exemplary disposable garment, in this case training pants, that utilizes the laminate material made according to the present invention.
  • FIG. 3 is a graph of stress relaxation modulus versus time determined during stress relaxation testing of a composite elastic laminate material produced using a pattern roll and testing of a composite elastic laminate material produced using two smooth rolls.
  • the present invention is directed to a dimensionally stable composite elastic material and laminates thereof having improved stress relaxation and improved creep resistance.
  • the present invention also relates to a method for forming composite elastic laminate materials that are dimensionally stable and latent and that have improved stress relaxation properties.
  • an elastic web 12 is unwound from a supply roll 14 and travels in the direction indicated by the arrow associated therewith as the supply roll 14 rotates in the direction of the arrows associated therewith.
  • the physical structure of the elastic web 12 can be a film, a non-woven or strands.
  • the elastic web 12 passes through the nip 16 of the S-roll arrangement formed by the stack rollers 20 and 22.
  • the elastic web 12 may also be formed in a continuous process such as, for example, the process described below, and passed through the nip 16 without being stored on a supply roll.
  • a first gatherable layer 24 is unwound from a supply roll 26 and travels in the direction indicated by the arrow associated therewith as the supply roll 26 rotates in the direction of the arrows associated therewith.
  • a second gatherable layer 28 is unwound from a second supply roll 30 and travels in the direction indicated by the arrow associated therewith as the supply roll 30 rotates in the direction of the arrows associated therewith.
  • the first gatherable layer 24 and the second gatherable layer 28 pass through the nip 32 of the calender roll arrangement 34 formed by the calender roll 36 and 38.
  • the first gatherable layer 24 and/or the second gatherable layer 28 may be formed by extrusion processes such as, for example, meltblowing processes, spunbonding processes or film extrusion processes and passed directly through the nip 32 without first being stored on a supply roll.
  • the elastic web 12 passes through the nip 16 of the S-roll arrangement 18 in a reverse-S path as indicated by the rotation direction arrows associated with the stack rollers 20 and 22. From the S-roll arrangement 18, the elastic web 12 passes through the pressure nip 32 formed by the calender roll arrangement 34. Additional S-roll arrangements (not shown) may be introduced between the S-roll arrangement 18 and the calender roll arrangement 34 to stabilize the stretched material and to control the amount of stretching. Because the peripheral linear speed of the rollers of the S-roll arrangement 18 is controlled so as to be less than the peripheral linear speed of the rollers of the calender roll arrangement 34, the elastic web 12 is tensioned between the S-roll arrangement 18 and the pressure nip of the calender roll arrangement 34.
  • filaments of the elastic web 12 in strand form should run along in the direction that the film is stretched so that the filaments can provide the desired stretch properties in the finished composite material.
  • the elastic web 12 is tensioned so that it stretches a desired amount and is maintained in such stretched condition while the first gatherable layer 24 and the second gatherable layer 28 are joined to the elastic web 12 during their passage through calender rolls 36 and 38 to form a composite elastic material 40.
  • the surfaces of calender rolls 36 and 38 are smooth and patternless.
  • the bond area of the composite elastic material 40 is 100% because both of the calender rolls are smooth-surfaced.
  • the stretched length of the polymeric material is at least about 50% of the original length.
  • the stretched length is up to about 95% of the ultimate elongation of the elastomer. It should be noted that different elastomers have different elongations. Even more preferably, the stretched length should be in the range of about 200% to about 600% where percent elongation is defined according to the following formula:
  • the composite elastic material 40 immediately relaxes upon release of the tensioning force provided by the S- roll arrangement 18 and the bonder roll arrangement 34, whereby the first gatherable layer 24 and the second gatherable layer 28 are gathered in the composite elastic material 40.
  • a permanent elongation length of from about 1.5 times the original length is retained after the stretched film is allowed to relax.
  • the composite elastic material 40 is then wound up on a winder 42.
  • the composite elastic material 40 may be wound under tension or without tension. If wound without tension, the composite elastic material will be stored in the roll in its unstretched state such that the material may be stretched at any time. If wound with tension, the composite elastic material is stored in a stretched condition. The elastic properties of the material stored in the stretched condition can be reactivated using heat or other conditions. Alternatively, the composite elastic material 40 may continue in line for further processing or conversion (not shown).
  • Polymeric materials that are useful in forming the elastic web 12 are generally known as "elastomers.” An elastomer is a rubber elastic material capable of stretching to several times its original, relaxed length and which tends to recover completely its elongation upon release of the stretching, biasing force.
  • the term “recover” refers to a contraction of a stretched material upon termination of a biasing force following the stretching of the material by application of the biasing force. Examples of these materials are indexed as “elastomers” in Bradley et al., Materials Handbook, 284-290 (M c Graw-Hill, Inc. 1991), incorporated herein by reference.
  • the elastomers useful in the present invention may be selected from the group consisting of elastomeric thermoplastic polymers.
  • the physical structure of the elastomer can be strands, cast or blown film, crimped, any non-woven web of fiber of a desired thermoplastic polymer or a combination thereof.
  • Suitable elastomeric thermoplastic polymers include styrene block copolymers such as, for example, those available under the trademark
  • KRATON® from Shell Chemical Company of Houston, Texas.
  • KRATON® block copolymers are available in several different formulations, a number of which are identified in U.S. Patents 4,663,220; 4,323,534; 4,834,738; 5,093,422; and 5,304,599 which are incorporated herein by reference.
  • Other exemplary elastomeric materials that may be used include polyurethane elastomeric materials such as, for example, those available under the trademark PELLATHANE® from Dow Chemical Company of Midland, Michigan or under the trademark ESTANE® from B.F.
  • polyester elastomeric materials such as, for example, those available under the trade designation HYTREL from E.I Dupont de Nemours & Company of Wilmington, Delaware and those known as ARNITEL® which were formerly available from Akzo Plastics of Arnhem, Holland and now available from DSM of Sittard, Holland; and polymers from metallocene-based catalysis which are available under the name ENGAGE® from Dow Chemical Company of Midland, Michigan for polyethylene-based polymers and from Exxon Chemical Company of Baytown, Texas under the trade name ACHIEVE® for polypropylene-based polymers and EXACT® and EXCEED® for polyethylene-based polymers.
  • HYTREL from E.I Dupont de Nemours & Company of Wilmington, Delaware
  • ARNITEL® which were formerly available from Akzo Plastics of Arnhem, Holland and now available from DSM of Sittard, Holland
  • polymers from metallocene-based catalysis which are available under the name ENGAGE
  • the gatherable layers, or facings, 24 and 28 may be fibrous non- woven materials such as, for example, spunbonded webs or meltblown webs.
  • a non-woven web as described herein, means a web having a structure of individual fibers or threads that are interlaid, but not in an identifiable, repeating manner.
  • a plurality of fibrous non-woven facings 24 and 28, as shown in FIG. 1 may also be used depending on the basis weight of the non- woven material used.
  • the gatherable layers 24 and 28 may be formed by a variety of processes including, but not limited to, meltblowing and spunbonding processes.
  • Meltblown fibers are fibers formed by extruding a molten thermoplastic material through a plurality of fine, usually circular, capillaries of a meltblowing die as molten threads or filaments into converging high- velocity, usually hot, gas (e.g., air) streams which are flowing in the same direction as the extruded filaments or threads of the molten thermoplastic material so that the extruded filaments or threads are attenuated, i.e., drawn or extended, to reduce their diameter.
  • gas e.g., air
  • the threads or filaments may be attenuated to microfiber diameter which means the threads or filaments have an average diameter not greater than about 75 microns, generally from about 0.5 microns to about 50 microns, and more particularly from about 2 microns to about 40 microns.
  • the meltblown fibers are carried by the high- velocity gas stream and are deposited on a collecting surface to form a web of randomly disbursed meltblown fibers.
  • the meltblown process is well- known and is described in various patents and publications, including NRL Report 4364, "Manufacture of Super-Fine Organic Fibers" by B.A. Wendt, E.L. Boone and D.D.
  • meltblown fibers are microfibers which may be continuous or discontinuous, are generally smaller than 10 microns in average diameter and are generally tacky when deposited onto a collecting surface.
  • Spunbonded fibers are small diameter fibers that are formed by extruding a molten thermoplastic material as filaments from a plurality of fine, usually circular, capillaries of a spinneret with the diameter of the extruded filaments then being rapidly reduced as by, for example, non-eductive or eductive fluid-drawing or other well-known spunbonding mechanisms.
  • the production of spunbonded non-woven webs is illustrated in patents such as, for example, U.S. Patent No. 4,340,563 to Appel et al.; U.S. Patent No. 3,802,817 to Matsuki et al.; U.S. Patent No. 3,692,618 to Dorschner et al; U.S. Patent No.
  • Spunbonded fibers generally are not tacky when deposited onto a collecting surface.
  • Spunbonded fibers generally are continuous and have average diameters (from a sample of at least 10) larger than 7 microns and, more particularly, from about 10 microns to about 20 microns.
  • the non-woven gatherable layers comprise spunbonded fibers.
  • the total weight of the spunbonded facing material is about 0.4 ounces per square yard.
  • Various techniques may be employed to secure the elastic web 12 onto the non-woven facings 24 and 28 such as, for example, adhesive bonding.
  • adhesive bonding an adhesive such as a hot melt, pressure sensitive adhesive is applied between the polymeric material and the facing to bind the polymeric material and facing together.
  • the adhesive can be applied by, for example, melt spraying, printing or meltblowing.
  • Various types of adhesives are available, including those produced from amorphous polyalphaolefins, ethylene vinyl acetate-based hot melts and KRATON® brand adhesives available from Shell Chemical Company of Houston, Texas.
  • the resulting composite elastic material 40 has elastic properties identical to those of the pure polymeric material.
  • the resulting laminate material suffers no loss of elasticity and provides better body conformance than laminate materials produced using one or more patterned calender rolls.
  • the filaments in the laminate materials of the present invention are also less likely to break.
  • the stress relaxation of the resulting composite elastic material 40 is at least about 1 psi less than the stress relaxation of a thermal, pattern- bonded material of similar composition at a time of about 8 hours.
  • the stress relaxation is at least about 2 psi less than that of a pattern-bonded material at a time of about 8 hours.
  • FIG. 2 there is illustrated a disposable garment 50 incorporating an elastic laminate made according to the present invention.
  • the disposable garment 50 includes waste containment section 52 and two side panels 54 and 56 defining a waist opening 58 and a pair of legs openings 60 and 62.
  • FIG. 2 illustrates the disposable garment 50 fitted on a wearer's torso 64 in dashed lines.
  • Side panel 54 includes stretchable side member 66 and stretchable side member 68 connecting intermediate member 70 which is made of a non-stretchable material.
  • side panel 56 includes stretchable side member 72 and stretchable side member 74 connecting intermediate member 76 which is made of a non-stretchable material.
  • Disposable garment 50 also includes front waist elastic member 78 and rear waist elastic member 80 for providing additional elasticity along waist opening 58.
  • Leg elastics 82 are provided with waist containment section 52 between side panels 54 and 56.
  • the composite elastic material of the present invention may be used to form various portions of the disposable garment 50 and particularly, the side panels 54 and 56.
  • the laminate material may also be used in the leg elastics 82 of the disposable garment 50.
  • a composite elastic material was made using two smooth-surfaced calender rolls according to the present invention.
  • a control material was made using pattern rolls according to the prior art process. Both materials were made from the same polymer blend.
  • FIG. 3 is a graph showing the stress relaxation modulus versus time curves of the composite elastic laminate material produced using a pattern roll (A) and the composite elastic laminate material produced using two smooth rolls (B). The resulting data can be fitted to the following power-law model to obtain the exponent, m:
  • Table I shows the rate of actual load loss, or slope, as calculated using the above-described formula and the actual load loss in 8 hours at 100°F. As can be seen in the Table, the use of the smooth calender rolls decreases the magnitude of the slope and the percent load loss favorably.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

Matériau composite élastique laminé, stable du point de vue dimensionnel et/ou latent. Le procédé de fabrication dudit matériau consiste à fournir un matériau polymère ayant une première longueur, à étirer ce matériau jusqu'à une seconde longueur et à lier au moins une garniture non tissée au matériau dans une calendreuse à deux cylindres de surface lisse, de manière à ne pas endommager la composante élastique ou à ne pas la fragiliser aux fins d'une utilisation dans l'article pour soins personnels auquel le matériau est destiné.
PCT/US1997/023825 1996-12-30 1997-12-22 Materiau composite elastique ameliore et procede de fabrication WO1998029251A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU57177/98A AU734540B2 (en) 1996-12-30 1997-12-22 Improved composite elastic material and process for producing the same
BR9714298-0A BR9714298A (pt) 1996-12-30 1997-12-22 Material elástico composto aperfeiçoado e processo para produção o mesmo
EP97953427A EP0954442A1 (fr) 1996-12-30 1997-12-22 Materiau composite elastique ameliore et procede de fabrication
CA002273914A CA2273914A1 (fr) 1996-12-30 1997-12-22 Materiau composite elastique ameliore et procede de fabrication

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US77750596A 1996-12-30 1996-12-30
US08/777,505 1996-12-30
US85493497A 1997-05-13 1997-05-13
US08/854,934 1997-05-13

Publications (1)

Publication Number Publication Date
WO1998029251A1 true WO1998029251A1 (fr) 1998-07-09

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PCT/US1997/023825 WO1998029251A1 (fr) 1996-12-30 1997-12-22 Materiau composite elastique ameliore et procede de fabrication

Country Status (6)

Country Link
EP (1) EP0954442A1 (fr)
KR (1) KR20000069777A (fr)
AU (1) AU734540B2 (fr)
BR (1) BR9714298A (fr)
CA (1) CA2273914A1 (fr)
WO (1) WO1998029251A1 (fr)

Cited By (29)

* Cited by examiner, † Cited by third party
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WO1999037480A1 (fr) * 1998-01-21 1999-07-29 Kimberly-Clark Worldwide, Inc. Procede et appareil pour la fabrication de voiles elastomeres lamines
WO1999065442A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Articles absorbants munis de boucles de ceinture et d'une ceinture reglable
WO1999065437A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Procede de fabrication d'articles absorbants munis d'une ceinture reglable
WO1999065438A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Articles absorbants jetables prealablement fixes comprenant des liens lateraux passifs et des systemes de fixation reglables
WO2000030581A1 (fr) * 1998-11-24 2000-06-02 Nordson Corporation Couches jetables a elastiques lateraux
WO2000058541A1 (fr) * 1999-03-31 2000-10-05 Kimberly-Clark Worldwide, Inc. Matiere elastique composite resistante au fluage et procede de production associe
US6410129B2 (en) 1999-09-17 2002-06-25 The Procter & Gamble Company Low stress relaxation elastomeric materials
US6503855B1 (en) 1998-10-02 2003-01-07 3M Innovative Properties Company Laminated composites
US6667085B1 (en) 1998-06-19 2003-12-23 Kimberly-Clark Worldwide, Inc. Method of making an absorbent article with prefastened side panels and absorbent articles made by the same
DE102004026070A1 (de) * 2004-05-25 2005-12-22 Sandra Baumgartner Verfahren zur Herstellung von elastischem Bahnmaterial
WO2006118838A2 (fr) 2005-04-29 2006-11-09 Kimberly-Clark Worldwide, Inc. Articles a elasticite latente et leur procede de fabrication
US7326311B2 (en) 2005-04-29 2008-02-05 Kimberly-Clark Worldwide, Inc. Method of producing intermittently elastic webs
WO2008039112A1 (fr) 2006-09-25 2008-04-03 Sca Hygiene Products Ab Sous-vêtement absorbant à ceinture et procédé
WO2008041888A1 (fr) 2006-10-03 2008-04-10 Sca Hygiene Products Ab Article absorbant et procédé de fabrication associé
WO2009082277A1 (fr) 2007-12-20 2009-07-02 Sca Hygiene Products Ab Couture liant l'un à l'autre aux moins deux matériaux de bande
WO2010044715A1 (fr) 2008-10-16 2010-04-22 Sca Hygiene Products Ab Article absorbant avec panneaux latéraux élastiques comprenant des balises
WO2010050854A1 (fr) 2008-10-30 2010-05-06 Sca Hygiene Products Ab Article absorbant jetable comprenant une étiquette imprimée
US7749211B2 (en) 2002-10-18 2010-07-06 Kimberly-Clark Worldwide, Inc. Body conforming absorbent garment and methods for the use and manufacture thereof
US7837665B2 (en) 2002-10-01 2010-11-23 Kimberly-Clark Worldwide, Inc. Three-piece disposable undergarment with folded crotch member
EP2288746A2 (fr) * 2008-05-15 2011-03-02 Kimberly-Clark Worldwide, Inc. Composite à élasticité latente formé avec un film multicouche
US8057457B2 (en) 2006-06-21 2011-11-15 Sca Hygience Products Ab Belted absorbent garment
US8147476B2 (en) 2003-05-30 2012-04-03 Kimberly-Clark Worldwide, Inc. Disposable absorbent article with overlapping absorbent assembly secured to front and back panels
US8197458B2 (en) 2006-07-13 2012-06-12 Sca Hygiene Products Ab Seam joining together at least two web materials
US8323167B2 (en) 2009-06-26 2012-12-04 Sca Hygiene Products Ab Method for manufacturing a pants-type diaper
US8353889B2 (en) 2007-11-08 2013-01-15 Sca Hygiene Products Ab Hygienic article with temporarily attached side panels
US8652113B2 (en) 2008-10-30 2014-02-18 Sca Hygiene Products Ab Disposable absorbent article comprising a printed tag
US8672912B2 (en) 2007-05-21 2014-03-18 Sca Hygiene Products Ab Absorbent article with improved fit
US8852161B2 (en) 2006-06-21 2014-10-07 Sca Hygiene Products Ab Belted absorbent garment
US8945324B2 (en) 2011-04-04 2015-02-03 Kimberly-Clark Worldwide, Inc. Process for making elastomeric absorbent garments to reduce absorbent bunching

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EP0327402A2 (fr) * 1988-02-05 1989-08-09 Tonen Chemical Corporation Feuille composite étanche à l'eau perméable au gaz
EP0330716A2 (fr) * 1988-03-02 1989-09-06 Ipf Interpatent + Franchise Aktiengesellschaft Feuille crêpée par échauffement et procédé et dispositif pour sa mise en forme
WO1990003464A2 (fr) * 1988-09-23 1990-04-05 Kimberly-Clark Corporation Materiau composite elastique unit par etranglement
US4981747A (en) * 1988-09-23 1991-01-01 Kimberly-Clark Corporation Composite elastic material including a reversibly necked material
US5514470A (en) * 1988-09-23 1996-05-07 Kimberly-Clark Corporation Composite elastic necked-bonded material
EP0432763A1 (fr) * 1989-12-15 1991-06-19 Kimberly-Clark Corporation Matériau composite élastique avec étirabilité multidirectionnelle ainsi que sa méthode de production
EP0436878A2 (fr) * 1990-01-10 1991-07-17 SPOHN VERPACKUNGSWERKE GmbH & CO. Stratifié ayant des tissus étirés et non-étirés, et procédé de réalisation d'un tel article

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999037480A1 (fr) * 1998-01-21 1999-07-29 Kimberly-Clark Worldwide, Inc. Procede et appareil pour la fabrication de voiles elastomeres lamines
WO1999065442A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Articles absorbants munis de boucles de ceinture et d'une ceinture reglable
WO1999065437A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Procede de fabrication d'articles absorbants munis d'une ceinture reglable
WO1999065438A1 (fr) 1998-06-19 1999-12-23 Kimberly-Clark Worldwide, Inc. Articles absorbants jetables prealablement fixes comprenant des liens lateraux passifs et des systemes de fixation reglables
US6667085B1 (en) 1998-06-19 2003-12-23 Kimberly-Clark Worldwide, Inc. Method of making an absorbent article with prefastened side panels and absorbent articles made by the same
US6835256B2 (en) 1998-10-02 2004-12-28 3M Innovative Properties Company Laminated composites
US6503855B1 (en) 1998-10-02 2003-01-07 3M Innovative Properties Company Laminated composites
WO2000030581A1 (fr) * 1998-11-24 2000-06-02 Nordson Corporation Couches jetables a elastiques lateraux
WO2000058541A1 (fr) * 1999-03-31 2000-10-05 Kimberly-Clark Worldwide, Inc. Matiere elastique composite resistante au fluage et procede de production associe
GB2363757A (en) * 1999-03-31 2002-01-09 Kimberly Clark Co A creep resistant composite elastic material and method of producing same
DE10084227B3 (de) * 1999-03-31 2013-01-03 Kimberly-Clark Worldwide, Inc. Kriechbeständiges elastisches Verbundmaterial und Verfahren zu seiner Herstellung
GB2363757B (en) * 1999-03-31 2003-07-02 Kimberly Clark Co A creep resistant composite elastic material and method of producing same
US6617016B2 (en) 1999-09-17 2003-09-09 The Procter & Gamble Company Low stress relaxation elastomeric materials
US6410129B2 (en) 1999-09-17 2002-06-25 The Procter & Gamble Company Low stress relaxation elastomeric materials
US8764721B2 (en) 2002-10-01 2014-07-01 Kimberly-Clark Worldwide, Inc. Three-piece disposable undergarment with folded crotch member and method for the manufacture thereof
US7837665B2 (en) 2002-10-01 2010-11-23 Kimberly-Clark Worldwide, Inc. Three-piece disposable undergarment with folded crotch member
US7749211B2 (en) 2002-10-18 2010-07-06 Kimberly-Clark Worldwide, Inc. Body conforming absorbent garment and methods for the use and manufacture thereof
US9433539B2 (en) 2003-05-30 2016-09-06 Kimberly-Clark Worldwide, Inc. Disposable absorbent article with overlapping absorbent assembly secured to front and back panels
US8664469B2 (en) 2003-05-30 2014-03-04 Kimberly-Clark Worldwide, Inc. Disposable absorbent article with overlapping absorbent assembly secured to front and back panels
US8147476B2 (en) 2003-05-30 2012-04-03 Kimberly-Clark Worldwide, Inc. Disposable absorbent article with overlapping absorbent assembly secured to front and back panels
DE102004026070A1 (de) * 2004-05-25 2005-12-22 Sandra Baumgartner Verfahren zur Herstellung von elastischem Bahnmaterial
DE102004026070B4 (de) * 2004-05-25 2006-06-29 Sandra Baumgartner Verfahren zur Herstellung von elastischem Bahnmaterial
KR101265361B1 (ko) * 2005-04-29 2013-05-20 킴벌리-클라크 월드와이드, 인크. 잠재적 탄성 물품 및 그의 제조 방법
AU2006242684B2 (en) * 2005-04-29 2012-01-12 Kimberly-Clark Worldwide, Inc. Latent elastic articles and methods of making thereof
WO2006118838A2 (fr) 2005-04-29 2006-11-09 Kimberly-Clark Worldwide, Inc. Articles a elasticite latente et leur procede de fabrication
WO2006118838A3 (fr) * 2005-04-29 2007-03-01 Kimberly Clark Co Articles a elasticite latente et leur procede de fabrication
US7326311B2 (en) 2005-04-29 2008-02-05 Kimberly-Clark Worldwide, Inc. Method of producing intermittently elastic webs
US7491666B2 (en) 2005-04-29 2009-02-17 Kimberly-Clark Worldwide, Inc. Latent elastic articles and methods of making thereof
JP2008539106A (ja) * 2005-04-29 2008-11-13 キンバリー クラーク ワールドワイド インコーポレイテッド 潜在的弾性物品及びその形成法
US8057457B2 (en) 2006-06-21 2011-11-15 Sca Hygience Products Ab Belted absorbent garment
US8852161B2 (en) 2006-06-21 2014-10-07 Sca Hygiene Products Ab Belted absorbent garment
US8197458B2 (en) 2006-07-13 2012-06-12 Sca Hygiene Products Ab Seam joining together at least two web materials
WO2008039112A1 (fr) 2006-09-25 2008-04-03 Sca Hygiene Products Ab Sous-vêtement absorbant à ceinture et procédé
US7828785B2 (en) 2006-09-25 2010-11-09 Sca Hygiene Products Ab Belted absorbent garment and method for making and testing
WO2008041888A1 (fr) 2006-10-03 2008-04-10 Sca Hygiene Products Ab Article absorbant et procédé de fabrication associé
US8672912B2 (en) 2007-05-21 2014-03-18 Sca Hygiene Products Ab Absorbent article with improved fit
US8353889B2 (en) 2007-11-08 2013-01-15 Sca Hygiene Products Ab Hygienic article with temporarily attached side panels
WO2009082277A1 (fr) 2007-12-20 2009-07-02 Sca Hygiene Products Ab Couture liant l'un à l'autre aux moins deux matériaux de bande
US8449519B2 (en) 2007-12-20 2013-05-28 Sca Hygiene Products Ab Seam joining together at least two web materials
AU2009247715B2 (en) * 2008-05-15 2015-04-02 Kimberly-Clark Worldwide, Inc. Latent elastic composite formed from a multi-layered film
EP2288746A2 (fr) * 2008-05-15 2011-03-02 Kimberly-Clark Worldwide, Inc. Composite à élasticité latente formé avec un film multicouche
US8709191B2 (en) 2008-05-15 2014-04-29 Kimberly-Clark Worldwide, Inc. Latent elastic composite formed from a multi-layered film
EP2288746A4 (fr) * 2008-05-15 2011-10-19 Kimberly Clark Co Composite à élasticité latente formé avec un film multicouche
US9724248B2 (en) 2008-05-15 2017-08-08 Kimberly-Clark Worldwide, Inc. Latent elastic composite formed from a multi-layered film
US8585669B2 (en) 2008-10-16 2013-11-19 Sca Hygiene Products Ab Absorbent article with elastic side panels
WO2010044715A1 (fr) 2008-10-16 2010-04-22 Sca Hygiene Products Ab Article absorbant avec panneaux latéraux élastiques comprenant des balises
US8652113B2 (en) 2008-10-30 2014-02-18 Sca Hygiene Products Ab Disposable absorbent article comprising a printed tag
US9060902B2 (en) 2008-10-30 2015-06-23 Sca Hygiene Products Ab Disposable absorbent article comprising a printed tag
WO2010050854A1 (fr) 2008-10-30 2010-05-06 Sca Hygiene Products Ab Article absorbant jetable comprenant une étiquette imprimée
US8323167B2 (en) 2009-06-26 2012-12-04 Sca Hygiene Products Ab Method for manufacturing a pants-type diaper
US8945324B2 (en) 2011-04-04 2015-02-03 Kimberly-Clark Worldwide, Inc. Process for making elastomeric absorbent garments to reduce absorbent bunching

Also Published As

Publication number Publication date
CA2273914A1 (fr) 1998-07-09
BR9714298A (pt) 2000-04-25
AU5717798A (en) 1998-07-31
EP0954442A1 (fr) 1999-11-10
AU734540B2 (en) 2001-06-14
KR20000069777A (ko) 2000-11-25

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