WO2001000917A1 - Non-tisses resistants multicouches - Google Patents

Non-tisses resistants multicouches Download PDF

Info

Publication number
WO2001000917A1
WO2001000917A1 PCT/US2000/018000 US0018000W WO0100917A1 WO 2001000917 A1 WO2001000917 A1 WO 2001000917A1 US 0018000 W US0018000 W US 0018000W WO 0100917 A1 WO0100917 A1 WO 0100917A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
fibers
nonwoven web
multilayer nonwoven
polymer
Prior art date
Application number
PCT/US2000/018000
Other languages
English (en)
Inventor
Gabriel Hamman Adam
Stephen Michael Campbell
Ryan Clinton Frank
Bryan David Haynes
Matthew Boyd Lake
David Michael Matela
Jeffrey Lawrence Mcmanus
David Craige Strack
Howard Martin Welch
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 MXPA02000572A priority Critical patent/MXPA02000572A/es
Priority to AU62025/00A priority patent/AU6202500A/en
Publication of WO2001000917A1 publication Critical patent/WO2001000917A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/554—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving by radio-frequency heating
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/559—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving the fibres being within layered webs
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter

Definitions

  • Nonwoven fabrics have been used as or in sorbents, wipers, filters, protective fabrics as well as numerous other end-use applications.
  • meltblown fiber webs have been used as pre-moistened or saturated wipes such as described in U.S. Patent No. 4,775,582 to Win et al.
  • abrasive or dual- textured meltblown fiber webs have been used as industrial and household wipers such as described in U.S. Patent No. 4,833,003 to Win et al.
  • Meltblown fiber webs provide a porous fine fiber structure having numerous small interstitial spaces throughout the web.
  • meltblown fiber webs have excellent absorbency and wicking characteristics for oil and, if treated, for aqueous and other liquids.
  • meltblown fiber webs have been used, either alone or in combination with other materials, in various other applications requiring good absorbency such as, for example, absorbent floor mats, oil booms and so forth.
  • nonwoven sorbents are often utilized as floor mats in working areas to absorb oil, grease or other like substances that are spilled on the floor in the course of work. By absorbing the grease and/or oil spilled on the floor it becomes less slippery for workers and thereby provides a safer working environment. In this regard, many sorbents can begin to fray, develop pilling, delaminate or otherwise deteriorate upon exposure to such rigorous treatment.
  • Nonwoven webs having an outer layer of thick fibers that alter or otherwise improve fabric properties are known.
  • a wipe which is sufficiently abrasive to serve as a scrubbing wipe without using added abrasive materials is described in U.S. Patent No. 4,659,609 to Lamers et al.
  • Lamers discloses a layered abrasive web including a supporting layer and a meltblown abrasive layer intimately bonded together.
  • the meltblown abrasive layer generally has a basis weight of from about 5 to about 25 grams per square meter (g/m 2 ) and is formed from fibers having an average fiber diameter of about 40 micrometers or more.
  • g/m 2 grams per square meter
  • U.S. Patent No. 5,639,541 to Adam describes an oil sorbent having improved abrasion resistance and, in one aspect, Adam describes a fine meltblown fiber web having a layer of coarse fibers bonded thereto. The coarse fibers have a fiber size larger than that of the fine meltblown fibers and provide increased abrasion resistance to the fabric. While providing a highly absorbent material with good abrasion resistance, many applications and uses require still greater abrasion resistance and durability.
  • the fabrics In addition to durability, in many wiping or cleaning operations it is often desirable that the fabrics also have improved cloth-like drape and/or a non-abrading surface. This is particularly desirable in many wipes used for cleaning or applying active agents to the skin or other sensitive surfaces. Abrasiveness of the fabric, and thus the amount of skin irritation resulting from use of the wipe, can often be increased by the presence of lint, shot or other irregularities in the web as well as the stiffness or hardness of the fabric itself.
  • nonwoven fabrics can often be improved by increasing inter-fiber bonding such as by the addition of external adhesives or by thermally point bonding the nonwoven fabric.
  • improved abrasion resistance would come at the expense of the overall absorbency and drape of the fabric.
  • the ability to achieve improved durability without sacrificing other desired attributes of the nonwoven fabric has proven difficult.
  • nonwoven fabrics of the present invention comprising a first layer of meltblown fibers and a second layer of meltblown fibers wherein the second layer of fibers comprise a blend of from 0% to about 95% by weight of a crystalline olefin polymer and from 100% to about 5% by weight of an amorphous olefin polymer.
  • the second layer of fibers is autogenously bonded to the first layer of fibers.
  • the multi- layered nonwoven web can have an abrasion resistance in excess of 250 cycles.
  • the amorphous polyolefin comprises between about 5% and about 50% of the fibers of the second layer.
  • the amorphous polyolefin polymer can comprise polymers having a crystallinity below 20% and, as examples, can comprise one or more propylene homopolymers, ethylene-propylene copolymers, propylene-butene copolymers and/or other propylene-alphaolefin copolymers.
  • the amorphous polyolefin polymer comprises a polyolefin elastomer.
  • the first layer of fine fibers desirably can have an average fiber diameter less than about 8 micrometers and the second layer of fibers can comprise fibers having a substantially similar average diameter or, in the alternative, fibers of a larger average fiber diameter.
  • the basis weight ratio of the first layer to the second layer can be about 1 :1 or, in a further aspect, can be about 2:1 or more.
  • the fibers of the first layer desirably comprise a propylene polymer such as, for example, crystalline polypropylene.
  • the fibers of the second layer desirably comprise a blend of a crystalline propylene polymer and an amorphous propylene polymer.
  • a durable multilayer nonwoven web composite material having a first layer of meltblown fibers and a second outermost layer of meltblown fibers autogenously bonded to the first layer and wherein the multilayer nonwoven composite material includes a tertiary material, such as particulate materials and/or short fibrous matter, dispersed within at least one of said first and second layers.
  • the tertiary material can comprise pulp and/or cellulosic fibers and are desirably dispersed throughout each of the layers of the multilayer nonwoven composite material.
  • the fibers of the second layer desirably comprise from 5% to 95% of an amorphous polyolefin and from 5% to 95% of a crystalline polyolefin.
  • the fibers of the first layer desirably comprise a propylene polymer such as, for example, crystalline polypropylene.
  • the fibers of the second layer desirably comprise a blend of crystalline polypropylene and an amorphous propylene polymer.
  • the amorphous polyolefin desirably comprises a propylene elastomer.
  • Figure 1 is a partially broken-away elevated view of a section of a multilayer meltblown fiber web of the present invention.
  • Figure 2 is a schematic diagram of an exemplary apparatus for forming multilayer meltblown fiber webs of the present invention.
  • Figure 3 is a cross-sectional side view of a section of a multilayer meltblown fiber web of the present invention.
  • Figure 4 is a schematic diagram of an exemplary apparatus for forming a multilayer meltblown fiber composite structure of the present invention.
  • nonwoven fabric or web means a web having a structure of individual fibers or threads which are interlaid, but not in an identifiable manner as in a knitted or woven fabric.
  • Nonwoven fabrics or webs have been formed by many processes such as for example, meltblowing processes, spunbonding processes, hydroentangling, air- laying, carded web processes, and so forth.
  • polymer generally includes but is not limited to, homopolymers, copolymers, such as for example, block, graft, random and alternating copolymers, terpolymers, etc. and blends and modifications thereof. Furthermore, unless otherwise specifically limited, the term “polymer” includes all possible spatial configurations of the molecule. These configurations include, but are not limited to isotactic, syndiotactic and random symmetries.
  • machine direction means the direction in which it is produced.
  • cross machine direction means the direction generally perpendicular to the MD.
  • liquid refers to liquids generally regardless of form and includes solutions, emulsions, suspensions and so forth.
  • autonomous bonding refers to inter-fiber bonding between discrete parts and/or surfaces independently of mechanical fasteners or external additives such as latex adhesives, solders and the like.
  • nonwoven web 10 comprises at least two layers including a first layer 12 of meltblown fibers and a second layer 14 of meltblown fibers.
  • the first layer is desirably a relatively thick layer having numerous interstitial spaces throughout the web.
  • the second layer 14 of nonwoven web 10 desirably faces the abrading or compacting force.
  • second layer 14 of nonwoven web 10 desirably faces up when used as a floor mat or faces the surface to be acted upon when used as a wiper or a cleaning implement.
  • the nonwoven web is typically made in the form of a sheet and stored in roll form. The sheet material can then be cut to the desired dimensions and/or shape as needed. Sorbents and wipes are commonly cut into square or rectangular sections.
  • floor mats are often cut into segments having dimensions of approximately 45 cm x 45 cm or more.
  • wipes are commonly cut into segments having dimensions of approximately 12 cm x 12 cm or more.
  • the materials can be converted as desired and specifically tailored to meet the needs of the end user. As particular examples, the materials can be readily converted into floor mats such as those described in U.S. Patent No. 4,609,580 to Rockett et al. or into pre-moistened handheld wipers such as described in U.S. patent 4,778,048 to Kaspar et al.; the entire contents of the aforesaid references are incorporated herein by reference.
  • the multilayer nonwoven web when evaluating the exposed second layer, desirably has a reciprocating abrasion resistance of at least 500 cycles and more desirably has a reciprocating abrasion resistance in excess of about 1000 and still more desirably has a reciprocating abrasion resistance in excess of about 1500 cycles.
  • the present invention provides a meltblown fiber nonwoven web that exhibits excellent abrasion resistance without significantly degrading the strength and/or absorbency of the same.
  • the nonwoven webs of the present invention can have an absorbent capacity for oil of at least about 8 grams and desirably have an absorbent capacity of about 11 grams or more and still more desirably have an absorbent capacity of about 15 grams or more.
  • the sorbent material can have a specific capacity of at least about 8 grams oil per gram substrate and more desirably has a specific capacity of at least about 10 grams oil per gram substrate and still more desirably has a specific capacity of at least about 12 grams oil per gram substrate.
  • the sorbent material also has the ability to retain absorbed fluid. Still further, the sorbent material is re-usable.
  • the sorbent material can be dried, such as with compressive force (e.g. wrung-dry) without disintegrating or substantially degrading the same.
  • the nonwoven web when utilized as a wiper, can provide a durable material that also provides a more pliable sheet and/or a less abrading surface, i.e. a surface that is softer or smoother on the skin, compared to like fabrics.
  • the improved drape and/or compliance of the multilayer nonwoven web can be provided while substantially maintaining the strength and integrity of the multilayer meltblown material.
  • First layer 12 desirably comprises a nonwoven web of fine fibers having an average fiber diameter of less than about 7 micrometers and more desirably having an average fiber diameter between about 1 micrometer and about 6 micrometers.
  • the first layer desirably has a basis weight of at least about 20 grams/square meter (g/m 2 ) and more desirably has a basis weight between about 50 g/m 2 and about 500 g/m 2 .
  • sorbent materials can employ a first layer having a basis weight between about 150 g/m 2 and about 400 g/m 2 and wipes employ a first layer having a basis weight between about 30 and 80 g/m 2 .
  • the first layer of fibers can be made by various methods known in the art and desirably comprises a nonwoven web of meltblown fibers.
  • Meltblown fibers are generally formed by extruding a molten thermoplastic material through a plurality of die capillaries as molten threads or filaments into converging high velocity, usually hot, gas (e.g. air) streams which attenuate the filaments of molten thermoplastic material to reduce their diameter. Thereafter, the meltblown fibers can be carried by the high velocity gas stream and are deposited on a collecting surface to form a web of randomly dispersed meltblown fibers.
  • Meltblown processes are disclosed, for example, in U.S. Patent No. 3,849,241 to Butin et al.; U.S.
  • Patent No. 4,100,324 to Anderson et al. U.S. Patent No. 3,959,421 to Weber et al.
  • U.S. Patent No. 5,652,048 to Haynes et al. U.S. Patent No. 5,271 ,883 to Timmons et al.
  • Meltblown fiber webs having high bulk, such as those described in U.S. Patent No. 5,652,048 to Haynes et al. are particularly well suited for use with the present invention.
  • the entire content of U.S. Patent No. 5,652,048 to Haynes et al. is incorporated herein by reference.
  • the first layer of fine fibers can be formed by a single meltblown die or by consecutive banks of meltblown fiber dies by depositing the fibers on a moving forming surface.
  • layer as used herein and throughout the term "layer”, unless otherwise noted, is used broadly and can comprise one or more sub-layers of like polymeric material.
  • Suitable thermoplastic polymers for forming the first layer of fine fibers include, but are not limited to, polyolefins (e.g., polypropylene and polyethylene), polycondensates (e.g., polyamides, polyesters, polycarbonates, and polyarylates), vinyl polymers, polyols, polydienes, polyurethanes, polyethers, polyacrylates, polycarbonates, polystyrenes, and so forth.
  • suitable polyolefins include, by way of example only, polyethylene, polypropylene, polybutene and copolymers and/or blends thereof.
  • the fibers can comprise propylene and/or ethylene polymers and copolymers thereof and more particularly can comprise copolymers of ethylene and/or propylene with alpha-olefins.
  • Additional examples of polymers suitable for making fine fibers also include poly(1- pentene), poly(2-pentene), poly(3-methyl-1-pentene), poly(4-methyl-1-pentene), nylon, polybutylene, polyethylene terephthalate, polybutylene terephthalate, and so forth.
  • thermoplastic elastomers are also suitable for use with the present invention such as, for example, ethylene-propylene rubbers, styrenic block copolymers, copolyester elastomers, polyamide elastomers and so forth.
  • the first layer of the nonwoven web comprises fibers of crystalline polymers having a crystallinity greater than 20% and still more desirably a crystallinity of about 30% or more and even still more desirably a crystallinity of about 50% or more.
  • the fine fiber web can comprise an inelastic crystalline propylene polymer.
  • the fibers of the second layer can comprise between 5% and 100% amorphous polyolefin.
  • the fibers comprise a composite or blend of two or more olefin polymers.
  • the second layer comprises thermoplastic fibers comprising an amorphous polyolefin and/or a blend of an amorphous polyolefin polymer with a second polyolefin.
  • amorphous polyolefins include those having a crystallinity less than 20%.
  • the amorphous polyolefins have a crystallinity less than about 10% and still more desirably a crystallinity below about 7%.
  • the amorphous polymer is desirably blended with one or more different polyolefins such as those described herein above and, desirably, comprises an ethylene polymer (e.g. liner low-density polyethylene and/or high-density polyethylene) or a crystalline propylene polymer.
  • the amorphous polyolefin desirably comprises between about 5% and about 95% of the polymeric component of the fiber and more desirably comprises between about 10% and about 50% of the polymeric component of the fiber.
  • the amorphous polyolefin desirably comprises between about 5% and about 45% and even more desirably comprises between about 10% and 35% of the polymeric component of the fiber.
  • the amorphous polyolefin desirably comprises between about 10% and about 95% by weight of the fiber and even more desirably comprises between about 10% and 50% by weight of the polymeric component of the fiber.
  • Exemplary amorphous polyolefins include amorphous polyalphaolefins that can comprise, by way of example only, one or more propylene homopolymers, ethylene- propylene copolymers, propylene-butene copolymers, and copolymers of propylene with other alphaolefins.
  • Exemplary commercially available amorphous polyalphaolefins include, by way of example only, the REXTAC family of amorphous polyalphaolefins from Huntsman Corp. and VESTOPLAST polymers from Creanova AKG.
  • a particularly preferred copolymer comprises a copolymer of propylene and 1 -butene under the trade designation REXTAC 2730.
  • the amorphous polyolefin can comprise an elastomer.
  • amorphous olefin elastomers believed suitable for use with the present invention include those available from Huntsman Corporation under the trade name REXFLEX FLEXIBLE POLYOLEFINS.
  • additional amorphous polyolefins believed suitable for use in the present invention include stereoblock polymers.
  • stereoblock polymer refers to polymeric materials with controlled regional tacticity or stereosequencing to achieve desired polymer crystallinity. By controlling the stereoregularity during polymerization, it is possible to achieve atactic-isotactic stereo blocks.
  • the second layer of the nonwoven web can comprise fibers having an average size or denier substantially similar to that of the fibers comprising the first layer.
  • the second layer of the nonwoven web can comprise fibers having a significant number of larger fibers.
  • the first layer can have an average fiber size less than about 7 micrometers and the second layer can have an average fiber size in excess of about 15 micrometers.
  • the fibers of the second layer can have an average fiber diameter between about 10 and about 35 micrometers and still more desirably an average fiber diameter of between about 12 micrometers and about 25 micrometers.
  • the second layer can comprise fibers having an average fiber size at least about 10 micrometers larger than that of the first layer.
  • the second layer desirably comprises a significant number of fibers in excess of about 20 microns and further can have a substantial number of fibers in excess of about 35 microns.
  • the second layer can comprise a relatively homogeneous collection of larger fibers or a mixture or blend of fibers of varying shape and/or thickness.
  • larger fibers can be created wherein smaller individual fibers "rope" or otherwise become length-wise bonded so as to collectively form larger fibers.
  • the second layer of meltblown fibers can have a basis weight similar to that of the first layer. However, the basis weight of the first layer is desirably greater than that of the second layer.
  • the basis weight ratio of the first layer to the second layer is desirably about 2:1 or more and as an example can be between about 4:1 to about 15:1.
  • the second layer desirably has a basis weight of at least about 17 g/m 2 and more desirably has a basis weight between about 20 g/m 2 and about 68 g/m 2 , and still more desirably between about 34 g/m 2 and about 58 g/m 2 .
  • the second layer of fibers can also be made by meltblown processes and, desirably, the fibers are deposited directly onto the first layer of the nonwoven web in a semi-molten state such that the fibers autogenously bond to the first layer.
  • meltblown fibers of larger diameter conventional meltblowing equipment can also be used to produce such fibers by properly balancing the polymer throughput, diameter of the die tip orifice, formation height (i.e. the distance from the die tip to the forming surface), melt temperature and/or draw air pressure.
  • formation height i.e. the distance from the die tip to the forming surface
  • a first series of meltblown banks 22, 23 produce a substantially homogeneous first layer 24 upon forming wire 26 and the process conditions or equipment comprising last meltblown bank 28 in the series of meltblown banks is adjusted such that it deposits a second layer 30 of larger fibers over the newly formed first layer of meltblown fibers 24, and thereby forming multilayer nonwoven 32.
  • larger fibers can be achieved on conventional meltblowing assets by reducing the primary air temperature and pressure as well as lowering the formation height.
  • the thickness or basis weight of the second layer can be increased as desired by increasing the number of consecutive meltblown banks altered to provide such fibers.
  • the multiple layers can, optionally, be further bonded together. If, however, further bonding is desired it is preferred to employ a bond pattern that does not bond more than about 15% of the surface area of the sheet. Desirably the bonded regions of the nonwoven fabric comprise between 0.5% and about 10% of the surface area of the fabric and still more desirably comprises between about 1 % and about 5% of the surface area of the fabric. Utilizing higher bonding areas can significantly reduce the absorbent capacity and/or significantly degrade the strength and/or drape of the nonwoven fabrics.
  • the multilayer laminate can be bonded by continuous or substantially continuous seams and/or discontinuous bonded regions. Preferably the multi-layered sorbent materials are point bonded.
  • point bonded refers to bonding one or more layers of fabric at numerous small, discrete bond points.
  • thermal point bonding generally involves passing one or more layers to be bonded between heated rolls such as, for example, an engraved patterned roll and an anvil roll.
  • the engraved roll is patterned in some way so that the entire fabric is not bonded over its entire surface, and the anvil roll is usually flat.
  • Numerous bond patterns have been developed in order to achieve various functional and/or aesthetic attributes, the particular nature of the pattern is not believed critical to the present invention. Exemplary bond patterns are described in U.S. Patent 3,855,046 to Hansen et al., U.S. Design Patent No. 356,688 to Uitenbroek et al. and U.S. Patent No. 5,620,779 to Levy et al. These and other bond patterns can be modified as necessary to achieve the desired bonding frequency and area.
  • a multilayer nonwoven sheet 40 having a third layer 46 similar or identical in composition to the second layer 44 and that is attached to the opposing side of first layer 42 and thus the first layer 42 of fine fibers is positioned between the second and third layers 44, 46.
  • the third layer desirably comprises fibers having a fiber size substantially similar to either those forming the first or second layer.
  • a highly pliable sorbent and/or wipe is provided having improved durability wherein the fibers of each of the first, second and third layers have an average fiber diameter less than about 7 micrometers and, still more desirably, have an average fiber size less than about 5 micrometers.
  • the nonwoven webs can be made using conventional meltblowing equipment such that, when using a multiple bank system, at least the first and last banks extrude the amorphous polyolefin blends described herein above.
  • the second and third layers can comprise a meltblown fiber web having an average fiber size greater than that of the first layer.
  • the first layer of fine fibers can comprise an inelastic propylene polymer having a crystallinity greater than 50% and the second and third layers of larger fibers can comprise a blend of an amorphous propylene polymer and an inelastic propylene polymer having a crystallinity greater than about 50%.
  • a third layer can be included within the multilayer laminate wherein the third layer of fine fibers is positioned adjacent the first layer of fine fibers and the second layer of larger fibers and further wherein the meltblown fibers of the third layer comprise a polymer composition similar and/or identical to that comprising the second layer.
  • the second to last bank can utilize the same polymer composition as the meltblown bank for forming the second layer wherein the process conditions and/or equipment is adjusted so as to form fine fibers similar to those of the first layer.
  • meltblown fiber web composites can be made incorporating fibrous or particulate materials therein by one or more processes known in the art.
  • meltblown fiber composites can be formed utilizing one or more "coforming" processes. Suitable coforming processes are described, by way of example only, in commonly assigned U.S. Patent 4,818,464 to Lau; U.S. Patent 4,100,324 to Anderson et al.; U.S. Patent 5,284,703 to Everhart et al.; and U.S.
  • coform materials can be made by a process in which one or more meltblown die heads are arranged near a chute through which other materials are added to the web while it is forming.
  • Such other materials may be, for example, pulp, superabsorbent particles, cellulose and/or staple fibers.
  • Meltblown fiber webs incorporating such materials desirably contain between about 30% and about 85% by weight of the fibrous or particulate material and still more desirably contain between about 50% and about 75% by weight of the fibrous or particulate material.
  • a multilayer nonwoven web comprising a first layer of crystalline propylene polymer fibers and a second layer of fibers comprising a blend of an amorphous propylene polymer and a crystalline propylene polymer wherein both layers contain pulp and/or cellulosic fibers dispersed therein.
  • apparatus 50 can be used to make an exemplary absorbent and highly pliable multilayer nonwoven web of the present invention.
  • Picker-roll assembly 52 can be used to generate a stream of short fibers 54, e.g.
  • thermoplastic meltblown fibers 57, 59 Between converging first and second streams of thermoplastic meltblown fibers 57, 59.
  • the first bank of meltblown dies 56 forms the first stream of meltblown fibers 57 and the second bank of meltblown dies 58 forms the second stream of meltblown fibers 59.
  • First and second polymer compositions, as described herein above, can be fed into the first and second meltblown dies 56, 58 respectively.
  • the stream of short fibers 54 is captured within the converging streams of thermoplastic polymer fibers thereby forming an autogenously bonded multilayer meltblown fiber composite material 62 upon forming surface 60.
  • the apparatus and processes for forming such composite structures are more thoroughly described in U.S. Patent 5,350,624 to Georger et al.
  • a composite nonwoven material comprising between about 60 to 70% pulp and wherein the first layer comprises a crystalline propylene polymer and the second layer comprises between about 50% and 90% of a crystalline propylene polymer and between about 10% and 50% of an amorphous propylene polymer.
  • the multilayer nonwoven materials of the present invention can be used alone or as part of a laminate structure in combination with additional materials.
  • the multilayer fabric of the present invention can, optionally, include various additives or topically applied chemicals in order to impart additional or improved characteristics to the nonwoven fabric.
  • additives and/or treatments are known in the art and include, for example, alcohol repellence treatments, anti-static treatments, wetting chemistries (i.e. compositions that make a surface more hydrophilic), fire retardants, disinfectants, antibacterial agents, anti-fungal, germicides, virucides, detergents, cleaners and so forth.
  • suitable additives and/or topical treatments suitable for use with the present invention include, but are not limited to, those described in U.S. Patent Nos.
  • the multi-layered material may be treated with the compositions described in commonly assigned U.S. Patent Application Nos. 09/320324 filed May 36, 1998 and 09/293294 filed April 16, 1999 to Yahiaoui et al., the entire contents of the aforesaid references are incorporated herein by reference.
  • Addition of chemical treatments to the materials of the present invention can be accomplished by various methods known to those skilled in the art. Preferred methods substantially uniformly apply the wetting chemistry throughout the substrate. As examples, the chemical treatments can be topically applied during or post web formation and/or added internally prior to extrusion. When added internally, a subsequent "blooming" step may be needed in order to bring the chemistry to the surface of the fiber.
  • a method for topically treating the porous material includes passing the sorbent sheet or fabric under an applicator, such as a spray boom, wherein an aqueous liquid, containing the desired chemistry, is applied or sprayed onto the porous substrate.
  • a vacuum can, optionally, be positioned under porous substrate in order to help draw aqueous liquid through the web and improve the uniformity of treatment. Thereafter the porous substrate, with the aqueous liquid thereon, is dried. Upon driving off the water, the desired chemistry remains upon or in the substrate.
  • spray booms can be located adjacent each bank or series of meltblown dies in order to spray the blown fibers with the desired chemistry prior to formation of the meltblown web on the forming wire. The heat of the blown fibers causes water or other solvents to flash off. Additional methods of treating substrates are also suitable for use with the present invention such as, for example, "dip and squeeze" processes, brush coating processes and so forth.
  • the wetting agent or other chemical composition generally comprise from about 0.1 % to about 10% of the total weight of the dried nonwoven web. However, the add-on weight of a particular chemistry can vary outside these ranges depending on the particular purpose and function of the same.
  • the multilayer nonwoven webs of the present invention can be used in a variety of materials and applications.
  • the multilayer nonwoven webs of the present invention are well suited for use as wet and/or dry wipes (including personal, medical, industrial, and/or residential uses), absorbent materials and sorbents, liquid delivery products, protective fabrics and so forth.
  • the multilayer nonwoven webs can be utilized in an absorbent floor mat.
  • the multilayer nonwoven webs can be utilized as a pre-moistened personal care wipe.
  • Absorption Capacity a 4-inch by 4-inch specimen is initially weighed. The weighed specimen is then soaked in a pan of test fluid (e.g. paraffin oil) for three minutes. The test fluid should be at least 2 inches (5.08 cm) deep in the pan. The specimen is removed from the test fluid and allowed to drain while hanging in a "diamond" shaped position (i.e. with one corner at the lowest point). The specimen is allowed to drain for 5 minutes. After the allotted drain time the specimen is placed in a weighing dish and then weighed.
  • Reciprocal Abrasion Test involves stroking a sample, usually 5.5 inch by 7 inch (140 mm by 180 mm) of fabric with a silicone rubber abrasive and then evaluating the fabric for pilling, roping and fuzzing.
  • the horizontally reciprocating dual head abrasion tester used herein is the Model no. 8675 from United States Testing Company, Inc. of Hoboken NJ.
  • the abradant, silicone solid rubber fiber glass reinforced material has a rubber surface hardness of 81 A Durometer, a Shore A of 81 ( ⁇ 9) and is 36 inches (914 mm) by 4 inches (102 mm) by 0.005 inches (0.127 mm) thick and is available as catalogue no.
  • the abradant should be conditioned by cycling it over a scrap piece of the material to be tested about 200 times.
  • the test sample should be free of folds, creases etc., mounted in the instrument on cork backing with the outermost second fiber layer facing up and cleaned of residual surface fibers with a camel hair brush.
  • the abradant arm should be lowered and the cycling begun at a total weight of 1180 g with half of the weight on each of the two abradant arms. The cycling of the abradant over the specimen is repeated until formation of extensive fiber piling and surface destruction.
  • Peel Test In peel or delamination testing a laminate is tested for the amount of tensile force which will pull the layers of the laminate apart. Values for peel strength are obtained using a specified width of fabric, usually 4 inches (102 mm), clamp width and a constant rate of extension. The sample is delaminated by hand a sufficient amount to allow it to be clamped into position. The specimen is clamped in, for example, an Instron Model TM, available from the Instron Corporation, 2500 Washington St., Canton, MA 02021, or a Thwing-Albert Model INTELLECT II available from the Thwing-Albert Instrument Co., 10960 Dutton Rd., Philadelphia, PA 19154, which have 3 inch (76 mm) long parallel clamps. The sample specimen is then pulled apart at 180° of separation and the tensile strength recorded.
  • Instron Model TM available from the Instron Corporation, 2500 Washington St., Canton, MA 02021
  • Thwing-Albert Model INTELLECT II available from the Th
  • Crystallinity can be determined is through the use of wide-angle X-ray diffraction (WAXD).
  • Cup Crush The softness of a nonwoven fabric may be measured according to the "cup crush” test.
  • the cup crush test evaluates fabric stiffness by measuring the peak load or "cup crush" required for a 4.5 cm diameter hemispherically shaped foot to crush a 25 cm by 25 cm piece of fabric shaped into an approximately 6.5 cm diameter by 6.5 cm tall inverted cup while the cup shaped fabric is surrounded by an approximately 6.5 cm diameter cylinder to maintain a uniform deformation of the cup shaped fabric. An average of 10 readings is used.
  • the foot and the cup are aligned to avoid contact between the cup walls and the foot which could affect the readings.
  • the peak load is measured while the foot is descending at a rate of 40.6 cm/minute and is measured in grams.
  • cup crush energy is the energy from the start of the test to the peak load point, i.e. the area under the curve formed by the load in grams on one axis and the distance the foot travels in millimeters on the other. Cup crush energy is therefore reported in g-mm. Lower cup crush values indicate a softer or more pliable laminate.
  • a suitable device for measuring cup crush is a Sintech Tensile Tester and 500g load cell using TESTWORKS Software all of which are available from Sintech, Inc. of Research Triangle Park, NO
  • Tensile Strength Tensile strength or peak load measures the maximum load (gram force) before the specimen ruptures.
  • a 4 inch by 6 inch sample is placed in a 1 inch by 1 inch rubber coated clamp or jaws and a 1 inch by 2 inch rubber coated clamp or jaws (with the longer dimension being perpendicular to the load) so that the machine direction (i.e. the direction in which the fabric is made) is parallel with the load.
  • the sample is placed in the jaws such that there is a 3 inch gage length.
  • the test can be performed with an 1130 Instron Tensile Tester (available from Instron Corporation of Canton, MA) and utilizes a cross-head speed of 12 inches/minute and a 10 pound load cell. The load at rupture is reported in grams.
  • Example 1 An 88 g/m 2 meltblown fiber web was made comprising a first layer of 47 g/m 2 fine fiber meltblown and a second layer of 41 g/m 2 larger fiber meltblown.
  • the fine fiber meltblown comprised a crystalline polypropylene, available from Himont USA, Inc. under the designation Polypropylene PF015, and had an average fiber size of approximately 6 micrometers.
  • the larger fiber meltblown comprised a blend of 65% by weight crystalline polypropylene, available from Himont USA, Inc. under the designation Polypropylene PF015, and 35% by weight amorphous polyalphaolefin, available from Huntsman Corporation under the designation REXTAC 2730, and had an average fiber size of approximately 18 micrometers.
  • the resulting meltblown web had an oil absorbency of approximately 8 grams, a specific capacity of 8.3 g/g, a peel strength of 93 g (0.206 lb.), and an abrasion resistance in excess of 1500 cycles (using reciprocal abrasion test).
  • a sorbent material is provided having both excellent absorbency as well as strength and durability.
  • Example 2 An 88 g/m 2 meltblown fiber web was made comprising a first layer of 47 g/m 2 fine fiber meltblown and second layer of 41 g/m 2 larger fiber meltblown.
  • the fine fiber meltblown comprised a crystalline polypropylene, available from Himont USA, Inc. under the designation Polypropylene PF015, and had an average fiber size of approximately 6 micrometers.
  • the larger fiber meltblown comprised a blend of 50% by weight crystalline polypropylene, available from Himont USA, Inc. under the designation Polypropylene PF015, and 50% by weight amorphous polyalphaolefin, available from Huntsman Corporation under the designation REXTAC 2730, and had an average fiber size of approximately 20 micrometers.
  • meltblown web had an oil absorbency of approximately 8 grams, a specific capacity of approximately 8 g/g, a peel strength of 108g (0.239 lb.), and an abrasion resistance in excess of 1500 cycles (using reciprocal abrasion test).
  • a sorbent material is provided having both excellent absorbency as well as strength and durability.
  • Example 3 A 75 g/m 2 multilayer meltblown fiber web composite was formed using angled dual-bank meltblowing equipment and processes as described in US patent No. 5,350,624 to Georger et al. The first bank extruded thermoplastic polymer fibers comprising PF015 polypropylene available from Himont USA, Inc.
  • thermoplastic polymer fibers comprising an amorphous propylene polymer, FPO WL 120 available from Huntsman Corporation.
  • the meltblown fiber composite comprised approximately 65%, by weight, CF405 pulp fibers available from Weyerhaueser Company.
  • the multilayer meltblown fiber composite had a tensile strength of 1250 g in the MD and 1102 g in the CD.
  • the multilayer meltblown composite had cup crush value of 2872 (dry) and 1118 (wet, i.e. 300 weight percent saturation).
  • the multilayer meltblown fiber composite produced lower transepidermal water loss (TEWL) on users over extended and repeated use, i.e. the resulting wipes cause less irritation of the skin and/or degradation of skin barrier function.
  • TEWL transepidermal water loss
  • Example 4 A first meltblown fiber web was formed, in accord with US Patent No.
  • the first meltblown fiber web was thermally point bonded.
  • a 34 g/m 2 second layer was formed directly upon the first meltblown fiber web and comprised 80%, by weight, PFO15 polypropylene and 20%, by weight, of an amorphous propylene elastomer, FPO WL 121.
  • the second layer was formed using an 8 inch forming height, an extrusion temperature of 380°F and with primary air temperature of 380°F at 3 psi.
  • the second layer had fibers having a larger diameter than those of the first layer.
  • the multilayer nonwoven web was point bonded along seams using mechanical compacting pressure. The resulting multilayer laminate had excellent absorbency and abrasion resistance.
  • Example 5 A multilayer meltblown fiber fabric was formed in-line using a multiple bank meltblown system.
  • a first meltblown fiber layer was formed, in accord with US Patent No. 5,811 ,178 to Adam et al., of PFO15 polypropylene fibers and had a basis weight of 348 g/m 2 .
  • the process conditions of the last bank was modified by reducing the forming height and cutting the primary air pressure by 50%, thereby providing a second layer of fibers having a larger average diameter relative to the first layer.
  • the second layer was formed upon the first layer, had a basis weight of 42 g/m 2 and the fibers comprised 70%, by weight, PFO15 polypropylene and 30%, by weight, of an amorphous propylene elastomer, FPO WL 121.
  • the resulting multilayer laminate exhibited excellent abrasion resistance and durability and also had a bulk of 0.17 inches a specific absorbent capacity of 8.8 g/g.

Abstract

L'invention concerne une bande de fibres résistante multicouche produite par soufflage en fusion et possédant une première couche de fibres fines cristallines de polypropylène et une deuxième couche de fibres adhérant directement à la première couche de fibres. La deuxième couche de fibres est obtenue à partir d'un mélange d'une polyoléfine cristalline et d'une polyalphaoléfine amorphe et peut présenter une dimension similaire ou une dimension moyenne plus importante que celle des fibres de la première couche. Ces bandes de fibres multicouches possèdent une durée de vie prolongée, une résistance à l'abrasion effectuée par déplacement alternatif supérieure à 1000 cycles et peuvent également constituer une bande extrêmement pliable présentant un drapé amélioré.
PCT/US2000/018000 1999-06-29 2000-06-29 Non-tisses resistants multicouches WO2001000917A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MXPA02000572A MXPA02000572A (es) 1999-06-29 2000-06-29 Materiales no tejidos de capas multiples durables.
AU62025/00A AU6202500A (en) 1999-06-29 2000-06-29 Durable multilayer nonwoven materials

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US14142999P 1999-06-29 1999-06-29
US60/141,429 1999-06-29
US60706700A 2000-06-29 2000-06-29
US09/607,067 2000-06-29

Publications (1)

Publication Number Publication Date
WO2001000917A1 true WO2001000917A1 (fr) 2001-01-04

Family

ID=26839111

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/018000 WO2001000917A1 (fr) 1999-06-29 2000-06-29 Non-tisses resistants multicouches

Country Status (3)

Country Link
AU (1) AU6202500A (fr)
MX (1) MXPA02000572A (fr)
WO (1) WO2001000917A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043951A2 (fr) * 2000-11-28 2002-06-06 Kimberly-Clark Worldwide Inc Stratifie d'etoffe nontisse, comprenant un voile obtenu par extrusion soufflage, a structure de dimension de fibres variable
WO2002053365A3 (fr) * 2000-12-29 2003-03-06 Kimberly Clark Co Materiau composite semblable a un tissu au toucher
WO2003051251A1 (fr) * 2001-12-14 2003-06-26 Kimberly-Clark Worldwide, Inc. Couches de gestion de fluides a deniers mixtes
WO2003093557A1 (fr) * 2002-04-29 2003-11-13 Kimberly-Clark Worldwide, Inc. Bande de non-tisse absorbante a texture double
WO2004025029A1 (fr) * 2002-09-11 2004-03-25 Kimberly-Clark Worldwide, Inc. Procede perfectionne d'utilisation d'additifs chimiques insolubles dans l'eau avec de la pate et produits fabriques au moyen de ce procede
WO2005066405A1 (fr) * 2003-12-30 2005-07-21 Kimberly-Clark Worldwide, Inc. Bandes non tisses presentant un peluchage et un eboulement reduits
US6926931B2 (en) * 2003-04-07 2005-08-09 Polymer Group, Inc. Dual sided nonwoven cleaning articles
WO2011041575A1 (fr) * 2009-10-02 2011-04-07 Exxonmobil Chemical Patents Inc. Composite multicouche ayant subi une fusion-soufflage et ses procédés de fabrication
US7994079B2 (en) 2002-12-17 2011-08-09 Kimberly-Clark Worldwide, Inc. Meltblown scrubbing product
WO2011112311A1 (fr) * 2010-03-12 2011-09-15 Exxonmobil Chemical Patents Inc. Constructions de stratifiés élastiques extrudés-soufflés et leurs procédés de fabrication
CN103255587A (zh) * 2012-09-16 2013-08-21 仙桃市德兴塑料制品有限公司 高过滤性无纺布自动生产系统及其生产的三m复合无纺布
US9168720B2 (en) 2009-02-27 2015-10-27 Exxonmobil Chemical Patents Inc. Biaxially elastic nonwoven laminates having inelastic zones
US9168718B2 (en) 2009-04-21 2015-10-27 Exxonmobil Chemical Patents Inc. Method for producing temperature resistant nonwovens
US9498932B2 (en) 2008-09-30 2016-11-22 Exxonmobil Chemical Patents Inc. Multi-layered meltblown composite and methods for making same
US10161063B2 (en) 2008-09-30 2018-12-25 Exxonmobil Chemical Patents Inc. Polyolefin-based elastic meltblown fabrics
DE102019000904A1 (de) * 2019-02-08 2020-08-13 Innovatec Microfibre Technology Gmbh & Co. Kg Verfahren zur Herstellung des Mehrschichtmaterials
WO2021173113A1 (fr) * 2020-02-24 2021-09-02 Kimberly-Clark Worldwide, Inc. Composition élastique multicouche non bloquante
WO2023245843A1 (fr) * 2022-06-24 2023-12-28 厦门延江新材料股份有限公司 Lingette de non-tissé et son procédé de fabrication

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659609A (en) * 1986-05-02 1987-04-21 Kimberly-Clark Corporation Abrasive web and method of making same
EP0590307A2 (fr) * 1992-10-05 1994-04-06 Kimberly-Clark Corporation Structure composite non-tissé fibreux résistant à l'abrasion
US5460884A (en) * 1994-08-25 1995-10-24 Kimberly-Clark Corporation Soft and strong thermoplastic polymer fibers and nonwoven fabric made therefrom
US5639541A (en) * 1995-12-14 1997-06-17 Kimberly-Clark Corporation Oil absorbent material with superior abrasive properties
WO1997034037A1 (fr) * 1996-03-14 1997-09-18 Kimberly-Clark Worldwide, Inc. Etoffe stratifiee non tissee, s'adaptant bien au corps
US5811178A (en) * 1995-08-02 1998-09-22 Kimberly-Clark Worldwide, Inc. High bulk nonwoven sorbent with fiber density gradient
WO2000037723A2 (fr) * 1998-12-19 2000-06-29 Kimberly-Clark Worldwide, Inc. Nappes de fibres fines a composants multiples et leurs stratifies

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659609A (en) * 1986-05-02 1987-04-21 Kimberly-Clark Corporation Abrasive web and method of making same
EP0590307A2 (fr) * 1992-10-05 1994-04-06 Kimberly-Clark Corporation Structure composite non-tissé fibreux résistant à l'abrasion
US5460884A (en) * 1994-08-25 1995-10-24 Kimberly-Clark Corporation Soft and strong thermoplastic polymer fibers and nonwoven fabric made therefrom
US5811178A (en) * 1995-08-02 1998-09-22 Kimberly-Clark Worldwide, Inc. High bulk nonwoven sorbent with fiber density gradient
US5639541A (en) * 1995-12-14 1997-06-17 Kimberly-Clark Corporation Oil absorbent material with superior abrasive properties
WO1997034037A1 (fr) * 1996-03-14 1997-09-18 Kimberly-Clark Worldwide, Inc. Etoffe stratifiee non tissee, s'adaptant bien au corps
WO2000037723A2 (fr) * 1998-12-19 2000-06-29 Kimberly-Clark Worldwide, Inc. Nappes de fibres fines a composants multiples et leurs stratifies

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043951A3 (fr) * 2000-11-28 2002-11-07 Kimberly Clark Co Stratifie d'etoffe nontisse, comprenant un voile obtenu par extrusion soufflage, a structure de dimension de fibres variable
WO2002043951A2 (fr) * 2000-11-28 2002-06-06 Kimberly-Clark Worldwide Inc Stratifie d'etoffe nontisse, comprenant un voile obtenu par extrusion soufflage, a structure de dimension de fibres variable
US6936554B1 (en) 2000-11-28 2005-08-30 Kimberly-Clark Worldwide, Inc. Nonwoven fabric laminate with meltblown web having a gradient fiber size structure
US6811638B2 (en) 2000-12-29 2004-11-02 Kimberly-Clark Worldwide, Inc. Method for controlling retraction of composite materials
WO2002053365A3 (fr) * 2000-12-29 2003-03-06 Kimberly Clark Co Materiau composite semblable a un tissu au toucher
US6781027B2 (en) 2001-12-14 2004-08-24 Kimberly-Clark Worldwide, Inc. Mixed denier fluid management layers
WO2003051251A1 (fr) * 2001-12-14 2003-06-26 Kimberly-Clark Worldwide, Inc. Couches de gestion de fluides a deniers mixtes
WO2003093557A1 (fr) * 2002-04-29 2003-11-13 Kimberly-Clark Worldwide, Inc. Bande de non-tisse absorbante a texture double
WO2004025029A1 (fr) * 2002-09-11 2004-03-25 Kimberly-Clark Worldwide, Inc. Procede perfectionne d'utilisation d'additifs chimiques insolubles dans l'eau avec de la pate et produits fabriques au moyen de ce procede
US7994079B2 (en) 2002-12-17 2011-08-09 Kimberly-Clark Worldwide, Inc. Meltblown scrubbing product
US6926931B2 (en) * 2003-04-07 2005-08-09 Polymer Group, Inc. Dual sided nonwoven cleaning articles
WO2005066405A1 (fr) * 2003-12-30 2005-07-21 Kimberly-Clark Worldwide, Inc. Bandes non tisses presentant un peluchage et un eboulement reduits
US10161063B2 (en) 2008-09-30 2018-12-25 Exxonmobil Chemical Patents Inc. Polyolefin-based elastic meltblown fabrics
US9498932B2 (en) 2008-09-30 2016-11-22 Exxonmobil Chemical Patents Inc. Multi-layered meltblown composite and methods for making same
US9168720B2 (en) 2009-02-27 2015-10-27 Exxonmobil Chemical Patents Inc. Biaxially elastic nonwoven laminates having inelastic zones
US9168718B2 (en) 2009-04-21 2015-10-27 Exxonmobil Chemical Patents Inc. Method for producing temperature resistant nonwovens
CN102686395A (zh) * 2009-10-02 2012-09-19 埃克森美孚化学专利公司 多层熔喷复合材料及其制造方法
WO2011041575A1 (fr) * 2009-10-02 2011-04-07 Exxonmobil Chemical Patents Inc. Composite multicouche ayant subi une fusion-soufflage et ses procédés de fabrication
CN102686395B (zh) * 2009-10-02 2015-04-08 埃克森美孚化学专利公司 多层熔喷复合材料及其制造方法
WO2011112311A1 (fr) * 2010-03-12 2011-09-15 Exxonmobil Chemical Patents Inc. Constructions de stratifiés élastiques extrudés-soufflés et leurs procédés de fabrication
CN102791481A (zh) * 2010-03-12 2012-11-21 埃克森美孚化学专利公司 弹性熔喷层压体构造及其制造方法
CN102791481B (zh) * 2010-03-12 2015-07-08 埃克森美孚化学专利公司 弹性熔喷层压体构造及其制造方法
JP2013521168A (ja) * 2010-03-12 2013-06-10 エクソンモービル・ケミカル・パテンツ・インク 弾性メルトブロー積層体構造体およびこれを作製するための方法
TWI580572B (zh) * 2010-03-12 2017-05-01 艾克頌美孚化學專利股份有限公司 熔噴之彈性積層構造及其製造方法
CN103255587A (zh) * 2012-09-16 2013-08-21 仙桃市德兴塑料制品有限公司 高过滤性无纺布自动生产系统及其生产的三m复合无纺布
DE102019000904A1 (de) * 2019-02-08 2020-08-13 Innovatec Microfibre Technology Gmbh & Co. Kg Verfahren zur Herstellung des Mehrschichtmaterials
WO2021173113A1 (fr) * 2020-02-24 2021-09-02 Kimberly-Clark Worldwide, Inc. Composition élastique multicouche non bloquante
GB2608910A (en) * 2020-02-24 2023-01-18 Kimberly Clark Co Non-blocking multilayer elastic composition
WO2023245843A1 (fr) * 2022-06-24 2023-12-28 厦门延江新材料股份有限公司 Lingette de non-tissé et son procédé de fabrication

Also Published As

Publication number Publication date
MXPA02000572A (es) 2002-07-02
AU6202500A (en) 2001-01-31

Similar Documents

Publication Publication Date Title
CA2508110C (fr) Produit de nettoyage jetable
WO2001000917A1 (fr) Non-tisses resistants multicouches
EP1575741B1 (fr) Produit fuse-souffle de nettoyage
EP1697122B1 (fr) Structures composites contenant des bandes de tissus et autres non tisses
EP1504145B1 (fr) Voile non tisse composite tridimensionnel
EP1691660B1 (fr) Article de lavage jetable
AU2004304773B2 (en) Disposable scrubbing product
US20030200991A1 (en) Dual texture absorbent nonwoven web
US20050148264A1 (en) Bimodal pore size nonwoven web and wiper
KR101141403B1 (ko) 습윤- 또는 건조-용도의 생분해성 집진 시트
WO1997023678A1 (fr) Matiere absorbant l'huile dote de proprietes superieures de resistance a l'abrasion
WO2003099517A1 (fr) Tampon nettoyeur composite non tisse
JP2002263043A (ja) ワイピング用不織布
WO2000053835A1 (fr) Torchon
MXPA06006057A (en) Disposable scrubbing product
MXPA06007291A (en) Composite structures containing tissue webs and other nonwovens

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: PA/a/2002/000572

Country of ref document: MX

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP