WO2018184043A1 - Bande non tissée conçue pour être utilisée dans une lingette de salle blanche - Google Patents

Bande non tissée conçue pour être utilisée dans une lingette de salle blanche Download PDF

Info

Publication number
WO2018184043A1
WO2018184043A1 PCT/AT2017/000024 AT2017000024W WO2018184043A1 WO 2018184043 A1 WO2018184043 A1 WO 2018184043A1 AT 2017000024 W AT2017000024 W AT 2017000024W WO 2018184043 A1 WO2018184043 A1 WO 2018184043A1
Authority
WO
WIPO (PCT)
Prior art keywords
nonwoven
nonwoven material
filaments
layers
web
Prior art date
Application number
PCT/AT2017/000024
Other languages
English (en)
Inventor
Tom Carlyle
Mirko Einzmann
Gisela Goldhalm
Malcolm John Hayhurst
Katharina Mayer
Ibrahim SAGERER-FORIC
Original Assignee
Lenzing Ag
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 Lenzing Ag filed Critical Lenzing Ag
Priority to PCT/AT2017/000024 priority Critical patent/WO2018184043A1/fr
Publication of WO2018184043A1 publication Critical patent/WO2018184043A1/fr

Links

Classifications

    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/013—Regenerated cellulose series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-blowing
    • 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
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • 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
    • D04H1/425—Cellulose series
    • D04H1/4258—Regenerated cellulose 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
    • D04H1/42—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
    • D04H1/4374—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 using different kinds of webs, e.g. by layering 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/02—2 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/05—5 or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/04—Cellulosic plastic fibres, e.g. rayon
    • 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
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • 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
    • B32B2307/54—Yield strength; Tensile strength
    • 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
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • B32B2307/726—Permeability to liquids, absorption
    • 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
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • 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
    • B32B2432/00—Cleaning articles, e.g. mops or wipes

Definitions

  • This invention relates to a nonwoven web suitable to be used as the base sheet for a clean room wipe and, more particularly, to an essentially pure cellulose nonwoven web formed from essentially continuous filaments and multibonded by merged filaments, hydrogen bonding and physical
  • this inventive nonwoven web provides biodegradability and sustainability. This invention further relates to additional bonding of this web alone, or to other webs or materials through hydroentangling to enhance these key performance properties needed in a clean room wipe.
  • essentially pure cellulose shall address the fact that cellulosic moulded bodies, e.g. made according to the lyocell process, always contain a small amount of polymers other than cellulose, namely hemicellulose. This does not influence in any way the suitability for the use according to this invention.
  • thermoplastic nonwoven suitable for clean room wipers Canadian 1 ,186,193 describes polyolefin based nonwovens treated to impart hydrophilicity to a hydrophobic web.
  • U.S. 3,811 ,957 describes a hydrophobic meltblown polyolefin nonwoven with low linting, good cleaning, which is also treated to add hydrophilicity.
  • U.S. 6,117,515 describes an absorbent nonwoven laminated between apertured films to provide both surface cleaning and absorbency, U.S.
  • JP 2008060666 describes a low linting nonwoven based on covering both surfaces of the wipe with electro- or melt-spun thermoplastic nanofibers to not only minimize dust but also to capture fine particles on the surface to be cleaned.
  • JP 2008078524 describes a low linting, absorbent nonwoven for clean room wiping applications composed of a meltblown multilayer structure where one layer is a meltspun hydrophilic thermoplastic copolymer of polyethylene glycol and polytetramethylene terephthalate polyester.
  • JP 2005160721 describes a meltspun regenerated cellulose nonwoven with low linting and excellent absorbency for use as a clean room wiper.
  • Staple fiber cellulose based nonwovens provide superior absorbency and surface cleaning, along with low extractables, but linting and dimensional stability are issues.
  • the optimal product would combine properties of both meltspun polyolefins and staple fiber cellulosic nonwovens.
  • JP 2008078524 describes a low linting, absorbent nonwoven for clean room wiping applications composed of a meltblown multilayer structure where one layer is a meltspun hydrophilic thermoplastic copolymer of polyethylene glycol and polytetramethylene terephthalate polyester. JP 2008078524 attempts to address the
  • thermoplastic nonwovens by using novel hydrophilic thermoplastic polymers instead of conventional polyolefins. This still does not solve the surface cleaning issues, and these novel polymers add significant cost and, like most thermoplastic polymers, are not sustainable products.
  • the present invention relates to the use of specially designed nonwoven substrates produced using novel variants of the spunlaid nonwoven process, comprising 100% cellulose polymers.
  • spunlaid cellulose webs There are known methods and products using spunlaid cellulose webs.
  • Clean room wipes can be based on paper, nonwoven, textile, sponge, or even foam substrates. Nonwovens have proven to be especially successful in meeting the stringent and varied needs of this product.
  • a clean room wipe must be low linting or fiber shedding, must have low residual ion content, must have low extractables in both water and various solvents, must be capable of surface cleaning, dry and wet, must be dimensionally stable, dry and wet, must be able to absorb and remove cleaned particulates and contaminants.
  • meltspun polyolefin nonwovens address half of the requirements, while the cellulosic-based nonwovens address a different range of needs.
  • An optimal solution is not available.
  • extractables water and solvents
  • b has good dimensional stability (wet and dry)
  • c) is absorbent
  • d provides excellent surface cleaning
  • e is able to absorb and recover spent or contaminated cleaning liquids from a surface
  • f is biodegradable, compostable and based on renewable resources.
  • the nonwoven material is characterized in that the cellulosic nonwoven web is made from essentially pure cellulose formed of essentially continuous filaments and multibonded by merged filaments, hydrogen bonding and physical intermingling of the filaments.
  • This material is suitable for use in critical cleaning applications such as aerospace manufacturing, paint preparation, window installation & cleaning and metal polishing.
  • This material which is essentially pure cellulose formed from essentially continuous filaments will provide the low linting, dimensional stability, low extractables and low residual ions of a meltspun polyolefin with the
  • the nonwoven material according to the invention is used in a clean room wipe that is designed to be a biodegradable, compostable and sustainable nonwoven with excellent cleanability, high strength, high abrasion resistance, high absorbency, and 100% biodegradability.
  • the nonwoven web which is a 100% continuous filament cellulose nonwoven will provide both high strength/abrasion resistance and high absorbency, and as a sustainable product, produced using an environmentally sound process.
  • the present invention is more absorbent and biodegradable and sustainably produced.
  • the present invention Compared to nonwoven substrates based on cellulosic fibers, the present invention has superior strength and abrasion resistance, with comparable absorbency, biodegradability and sustainability.
  • the present invention Compared to composites, including those of hydroentangied combinations of meltblown polyolefins with cellulose materials, the present invention has equivalent strength, superior cleanability, liquid take up rate, and overall absorbency.
  • the degree of merged filament bonding also results in a range of filament diameters and cross-sections being present. This characteristic enables additional cleanability versus nonwoven webs with a tight range of fiber and/or filament diameters and standard cross sections.
  • the inventive nonwoven material is further processed by
  • hydroentanglement It surprisingly still has acceptable consumer acceptable drape and softness while it still can be loaded with a solution, has high wet strength and abrasion resistance, is absorbent and dispenses absorbed liquids uniformly, and is compostable and based on renewable resources.
  • the first cellulosic nonwoven web is preferably made according to a lyocell process.
  • Cellulosic fibres can be produced by various processes.
  • a lyocell fibre is spun from cellulose dissolved in N-methyl morpholine N-oxide (NMMO) by a meltblown process, in principle known from e.g. EP 1093536 B1 , EP 2013390 B1 and EP 2212456 B1.
  • meltbiown it will be understood that it refers to a process that is similar or analogous to the process used for the production of synthetic thermoplastic fibres (filaments are extruded under pressure through nozzles and stretched to required degree by high velocity/high temperature extension air flowing substantially parallel to the filament direction), even though the cellulose is dissolved in solution (i.e.
  • the web is formed by a spun bonding process, where filaments are stretched via lower temperature air.
  • spunbonded synthetic fibres are longer than meltbiown synthetic fibres which usually come in discrete shorter lengths. Fibres formed by the solution blown lyocell process can be continuous or discontinuous depending on process conditions such as extension air velocity, air pressure, air temperature, viscosity of the solution, cellulose molecular weight and distribution and combinations thereof.
  • the fibres are contacted with a non-solvent such as water (or water/NMMO mixture) by spraying, after extrusion but before web formation.
  • a non-solvent such as water (or water/NMMO mixture)
  • the fibres are subsequently taken up on a moving foraminous support to form a nonwoven web, washed and dried.
  • Freshly-extruded lyocell solution ('solvent spun', which will contain only, for example, 5-15% cellulose) behaves in a similar way to 'sticky' and deformable thermoplastic filaments. Causing the freshly-spun filaments to contact each other while still swollen with solvent and with a 'sticky' surface under even low pressure will cause merged filament bonding, where molecules from one filament mix irreversibly with molecules from a different filament. Once the solvent is removed and coagulation of filaments completed, this type of bonding is impossible. It is another object of the present invention to provide a process for the manufacture of a nonwoven material consisting of essentially continuous cellulosic filaments by:
  • coagulation liquor i.e. a liquid which is able to cause coagulation of the dissolved cellulose; in a lyocell process this preferably is water or a diluted solution of NMMO in water, is applied to control the merged filament bonding.
  • the amount of merged filament bonding is directly dependent on the stage of coagulation of the filaments when the filaments come into contact. The earlier in the coagulation process that the filaments come into contact, the greater the degree of filament merging that is possible. Both placement of the coagulation liquor application and the speed at which the application liquor is applied can either increase, or decrease, the rate of coagulation. Which results in control of the degree (or amount) of merged filament bonding that occurs in the material.
  • the merged filament bonding is further controlled by filament spinning nozzle design and arrangement and the configuration and temperature of filament extension air.
  • the degree of molecular alignment that is present as the solution exits the spinning nozzle has an impact on the coagulation rate. The more aligned the molecules are, the faster the coagulation rate, and conversely, the less aligned the molecules are, the slower the coagulation rate.
  • the spinning nozzle design and arrangement, along with the molecular weight of the cellulosic raw material used will determine the starting coagulation rate at the exit of the spinning nozzle. Additionally, the rate of cooling (temperature decrease) of the solution upon spinning nozzle exit will impact the coagulation rate as well.
  • At least two spinnerets also known as jets
  • spinnerets preferably between two and ten, and further preferred between 2 and 6, each one arranged to form a layer of nonwoven web
  • spinnerets are used to obtain a multilayer nonwoven material.
  • the filaments are spun using a solution of cellulose in an aqueous amine oxide and the coagulation liquor is water, preferably with a content of amine oxide not being able to dissolve cellulose, also referred to as a lyocell process; the manufacture of such a solution is in principle known, e.g. from U.S. 6,358,461 , U.S. 7,067,444, U.S. 8,012,565, U.S. 8,191 ,214, U.S.
  • amine oxide is NMMO.
  • the present invention describes a cellulosic nonwoven web produced via a meltblown or spunbond-type process.
  • the filaments produced are subjected to touching and/or compaction and/or intermingling at various points in the process, particularly before and during initial web formation.
  • Contact between filaments where a high proportion of solvent is still present and the filaments are still swollen with said solvent causes merged filament bonding to occur.
  • the amount of solvent present as well as temperature and contact pressure controls the amount of this bonding.
  • the amount of filament intermingling and hydrogen bonding can be limited by the degree of merged filament bonding.
  • This is the result of a decrease in filament surface area and a decrease in the degree of flexibility of the filaments.
  • the degree of merged filament bonding increase, the amount of overall surface area is decreased, and the ability of cellulose to form hydrogen bonds is directly dependent on the amount of hydroxyl groups present on the cellulosic surface.
  • filament intermingling happens as the filaments contact the forming belt. The filaments are traveling at a faster rate of speed than the forming belt. Therefore, as the filament contacts the belt, it will buckle and sway side to side, and back and forth, just above the forming belt.
  • the filaments will intermingle with neighboring filaments. If the filaments touch and merge prior to the forming belt, this limits the number of neighboring filaments by which it can intermingle with. Additionally, filaments that merge prior to contacting the forming belt with not have the same degree of flexibility as a single filament and this will limit the total area over which the filament will buckle and sway.
  • the nonwoven material is dried prior to subsequent bonding/treatment.
  • the percentage of each type of bonding is controlled using a process with up to two compaction steps, where one of these compaction steps is done after step d. of the inventive process where the spun filaments are still swollen with a solvent, and one of these compaction steps is done before or in step e. of the inventive process where all or most of the solvent has been removed and the web has been wet with water.
  • control of the coagulation of the spun solution is a factor in controlling the degree of merged filament bonding.
  • This preferred embodiment concerns decreasing the coagulation rate to a state where additional compaction steps can be used after filament laydown to further increase the actual amount of merged filament boding that is achievable. It might be helpful to view the maximum achievable filament bonding as the state where we have merged all filaments into an essentially film-like structure.
  • the present invention describes a process and product where merged filament bonding, physical intermingling and hydrogen bonding can be controlled independently.
  • the degree of merged filament bonding can limit the degree of physical intermingling and hydrogen bonding that can occur.
  • process conditions can be adjusted to optimise these bonding mechanisms between layers. This can include modifying ease of delamination of layers, if required.
  • additional bonding/treatment steps may optionally be added. These bonding/treatment steps may occur while the web is still wet with water, or dried (either fully or partially).
  • bonding/treatment steps may add additional bonding and/or other web property modification.
  • These other bonding/treatment steps include hydroentangling or spunlacing, needling or needlepunching, adhesive or chemically bonding.
  • various post- treatments to the web may also be applied to achieve specific product performance.
  • post-treatments it is possible to apply finishes and other chemical treatments directly to the web of this invention during production which will not then be removed, as occurs with, for example, a post-treatment hydroentanglement step.
  • Varying the degree of merged filament bonding provides unique property characteristics for nonwoven cellulose webs with regards to softness, stiffness, dimensional stability and various other properties. Properties may also be modified by altering the degree of physical intermingling before and during initial web formation. It is also possible to influence hydrogen bonding, but the desired effect of this on web properties is minor. Additionally, properties can be adjusted further by including an additional
  • bonding/treatment step such as hydroentangling, needlepunching, adhesive bonding and/or chemical bonding.
  • Each type of bonding/treatment provides benefits to the nonwoven web.
  • hydroentangling can add some strength and soften the web as well as potentially modifying bulk density; needling is typically employed for higher basis weights and used to provide additional strength; adhesive and chemical bonding can add both strength and surface treatments, like abrasive material, tackifiers, or even surface lubricants.
  • the present invention allows independent control of the key web bonding features: merged filaments, intermingling at web formation, hydrogen bonding and optional additional downstream processing. Manipulation of merged filament bonding can be varied to predominantly dictate the properties of the nonwoven web.
  • the nonwoven material contains a second layer, consisting of a celluiosic nonwoven web, which is formed of essentially continuous filaments, pulp fiber or staple fiber, which is formed on top of the first celluiosic nonwoven web, and subsequently both layers are hydroentangled together.
  • a celluiosic nonwoven web which is formed of essentially continuous filaments, pulp fiber or staple fiber, which is formed on top of the first celluiosic nonwoven web, and subsequently both layers are hydroentangled together.
  • the nonwoven material contains a third layer, consisting of a celluiosic nonwoven, which is formed of essentially continuous filaments, pulp fiber or staple fiber, which is formed on top, and subsequently all three layers are hydroentangled together
  • a third layer consisting of a celluiosic nonwoven, which is formed of essentially continuous filaments, pulp fiber or staple fiber, which is formed on top, and subsequently all three layers are hydroentangled together
  • another useful advantage is to have one outer layer as high density for cleaning a surface (“scrubby layers”), another outer layer to have a high surface area for excellent lotion distribution with the center layer designed to have a high absorbent capacity.
  • one or more of the celluiosic nonwoven layers within the nonwoven material, if formed of essentially continuous filaments, are made according to a lyocell process.
  • the lyocell process allows for use of a sustainable raw material (pulp) and provides a final filament with high purity (very low residual chemicals).
  • both layers consist of continuous filaments, made according to a lyocell process, or one layer consist of continuous filaments, made according to a lyocell process, and the second layer consist of pulp fiber.
  • a three-layer material in particularly preferred embodiments of a three-layer material according to the invention either all three layers consist of continuous filaments, made according to a lyocell process, or the two outer layers consist of continuous filaments, made according to a lyocell process, and the middle layer consist of pulp fiber.
  • a 66-gsm fabric product of the invention was compared with a commercial product of the same basis weight comprised of 50 % lyocell and 50 % polyester for water uptake using test method DIN 53923.
  • the product of invention showed a 1.3 times higher water uptake compared to the
  • a 50-gsm fabric product of the invention was compared with a commercial product of the same basis weight comprised of 100 % lyocell for dimensional stability as indicated by stiffness. Fabric stiffness was measured using a 'Handle-o-meter' according to standard method WSP 90.3, with 1 ⁇ 4 inch slot width, stainless steel surface and 1000 g beam. Sample size was 10cm x 10cm. The product of invention showed a 2.7 higher overall stiffness compared to the commercial sample.
  • the product of invention was wetted with water 3 fold (equilibrium time 2 hours). Then it was used in MD for a wiping test, wiping over a glass plate, which was free of visible particles prior to test.
  • the wiping equipment simulates a real wiping movement with 550 g wiping pressure.
  • the product of invention showed no visible wet lint from this test.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne une matière non tissée conçue pour être utilisée en tant que lingette de salle blanche, et contenant au moins une première bande non tissée cellulosique qui (a) présente un faible peluchage, ainsi qu'une faible teneur en ions résiduels et en substances extractibles (eau et solvants), (b) possède une bonne stabilité dimensionnelle (à l'état humide et sec), (c) est absorbante, (d) fournit un excellent nettoyage de surface, (e) est capable d'absorber et de récupérer des liquides de nettoyage utilisés ou contaminés, à partir d'une surface, et (f) est biodégradable, compostable et à base de ressources renouvelables. Cette matière non tissée st caractérisée en ce que la bande non tissée cellulosique est constituée de cellulose essentiellement pure, formée de filaments essentiellement continus et multiliée par des filaments fusionnés, une liaison hydrogène et un enchevêtrement physique des filaments.
PCT/AT2017/000024 2017-04-03 2017-04-03 Bande non tissée conçue pour être utilisée dans une lingette de salle blanche WO2018184043A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/AT2017/000024 WO2018184043A1 (fr) 2017-04-03 2017-04-03 Bande non tissée conçue pour être utilisée dans une lingette de salle blanche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/AT2017/000024 WO2018184043A1 (fr) 2017-04-03 2017-04-03 Bande non tissée conçue pour être utilisée dans une lingette de salle blanche

Publications (1)

Publication Number Publication Date
WO2018184043A1 true WO2018184043A1 (fr) 2018-10-11

Family

ID=59269715

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AT2017/000024 WO2018184043A1 (fr) 2017-04-03 2017-04-03 Bande non tissée conçue pour être utilisée dans une lingette de salle blanche

Country Status (1)

Country Link
WO (1) WO2018184043A1 (fr)

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811957A (en) 1969-07-22 1974-05-21 Exxon Research Engineering Co Battery separators made from polymeric fibers
US3978185A (en) 1968-12-23 1976-08-31 Exxon Research And Engineering Company Melt blowing process
CA1186193A (fr) 1981-01-29 1985-04-30 Stephen M. Englebert Chiffon pour usage en salle blanche
WO1995035400A1 (fr) * 1994-06-22 1995-12-28 Courtaulds Fibres (Holdings) Limited Procede de production d'une fibre de cellulose filee avec solvant
WO1998026122A1 (fr) * 1996-12-10 1998-06-18 Acordis Fibres (Holdings) Limited Procede de fabrication d'un textile non tisse
WO2000037724A2 (fr) * 1998-12-21 2000-06-29 E.I. Du Pont De Nemours And Company Etoffes non-tissees destinees a des applications d'essuyage
US6117515A (en) 1997-01-31 2000-09-12 Kimberly-Clark Worlwide, Inc. Non-particulating and low particulating disposable products for use in clean room environments
US6235392B1 (en) * 1996-08-23 2001-05-22 Weyerhaeuser Company Lyocell fibers and process for their preparation
EP1093536B1 (fr) 1998-06-05 2003-10-01 Tencel Limited Non-Tisse et procede servant a le fabriquer
US20050056956A1 (en) * 2003-09-16 2005-03-17 Biax Fiberfilm Corporation Process for forming micro-fiber cellulosic nonwoven webs from a cellulose solution by melt blown technology and the products made thereby
JP2005160721A (ja) 2003-12-02 2005-06-23 Asahi Kasei Fibers Corp クリーンルーム用ワイパー
WO2006035458A1 (fr) * 2004-09-17 2006-04-06 Birla Research Institute For Applied Sciences Procede de preparation d'une structure cellulosique non- tissee et structure cellulosique non-tissee ainsi preparee
WO2007124522A1 (fr) * 2006-04-28 2007-11-08 Lenzing Aktiengesellschaft Produit non-tisse obtenu par fusion-soufflage
WO2007124521A1 (fr) * 2006-04-28 2007-11-08 Lenzing Aktiengesellschaft Produits hydro-enchevêtrés comprenant des fibres de cellulose
JP2008060666A (ja) 2006-08-29 2008-03-13 Ricoh Co Ltd 画像形成装置、画像形成方法、画像形成プログラム及びコンピュータ読み取り可能な記録媒体
JP2008078524A (ja) 2006-09-25 2008-04-03 Asahi Kasei Fibers Corp ワイパー及びその製造方法
WO2009059342A1 (fr) * 2007-11-07 2009-05-14 Lenzing Aktiengesellschaft Procédé de production d'un produit hydrolié comprenant des fibres de cellulose
US7968480B2 (en) 2006-02-15 2011-06-28 Polymer Group, Inc. Multi-lobal fiber containing nonwoven materials and articles made therefrom
US8012565B2 (en) 2008-03-31 2011-09-06 Weyerhaeuser Nr Company Lyocell nonwoven webs
US8191214B2 (en) 2008-12-31 2012-06-05 Weyerhaeuser Nr Company Method for making lyocell web product
US8263506B2 (en) 2008-06-30 2012-09-11 Weyerhaeuser Nr Company Nonwoven lyocell fiber webs for filtration
US8318318B2 (en) 2008-12-31 2012-11-27 Weyerhaeuser Nr Company Lyocell web product

Patent Citations (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978185A (en) 1968-12-23 1976-08-31 Exxon Research And Engineering Company Melt blowing process
US3811957A (en) 1969-07-22 1974-05-21 Exxon Research Engineering Co Battery separators made from polymeric fibers
CA1186193A (fr) 1981-01-29 1985-04-30 Stephen M. Englebert Chiffon pour usage en salle blanche
WO1995035400A1 (fr) * 1994-06-22 1995-12-28 Courtaulds Fibres (Holdings) Limited Procede de production d'une fibre de cellulose filee avec solvant
US7067444B2 (en) 1996-08-23 2006-06-27 Weyerhaeuser Company Lyocell nonwoven fabric
US6235392B1 (en) * 1996-08-23 2001-05-22 Weyerhaeuser Company Lyocell fibers and process for their preparation
US6358461B1 (en) 1996-12-10 2002-03-19 Tencel Limited Method of manufacture of nonwoven fabric
WO1998026122A1 (fr) * 1996-12-10 1998-06-18 Acordis Fibres (Holdings) Limited Procede de fabrication d'un textile non tisse
US6117515A (en) 1997-01-31 2000-09-12 Kimberly-Clark Worlwide, Inc. Non-particulating and low particulating disposable products for use in clean room environments
EP1093536B1 (fr) 1998-06-05 2003-10-01 Tencel Limited Non-Tisse et procede servant a le fabriquer
WO2000037724A2 (fr) * 1998-12-21 2000-06-29 E.I. Du Pont De Nemours And Company Etoffes non-tissees destinees a des applications d'essuyage
US20050056956A1 (en) * 2003-09-16 2005-03-17 Biax Fiberfilm Corporation Process for forming micro-fiber cellulosic nonwoven webs from a cellulose solution by melt blown technology and the products made thereby
JP2005160721A (ja) 2003-12-02 2005-06-23 Asahi Kasei Fibers Corp クリーンルーム用ワイパー
WO2006035458A1 (fr) * 2004-09-17 2006-04-06 Birla Research Institute For Applied Sciences Procede de preparation d'une structure cellulosique non- tissee et structure cellulosique non-tissee ainsi preparee
US7968480B2 (en) 2006-02-15 2011-06-28 Polymer Group, Inc. Multi-lobal fiber containing nonwoven materials and articles made therefrom
WO2007124522A1 (fr) * 2006-04-28 2007-11-08 Lenzing Aktiengesellschaft Produit non-tisse obtenu par fusion-soufflage
WO2007124521A1 (fr) * 2006-04-28 2007-11-08 Lenzing Aktiengesellschaft Produits hydro-enchevêtrés comprenant des fibres de cellulose
EP2013390B1 (fr) 2006-04-28 2015-08-19 Lenzing Aktiengesellschaft Produits hydro-enchevêtrés comprenant des fibres de cellulose
JP2008060666A (ja) 2006-08-29 2008-03-13 Ricoh Co Ltd 画像形成装置、画像形成方法、画像形成プログラム及びコンピュータ読み取り可能な記録媒体
JP2008078524A (ja) 2006-09-25 2008-04-03 Asahi Kasei Fibers Corp ワイパー及びその製造方法
WO2009059342A1 (fr) * 2007-11-07 2009-05-14 Lenzing Aktiengesellschaft Procédé de production d'un produit hydrolié comprenant des fibres de cellulose
EP2212456B1 (fr) 2007-11-07 2015-07-22 Lenzing Aktiengesellschaft Procédé de production d'un produit hydrolié comprenant des fibres de cellulose
US8012565B2 (en) 2008-03-31 2011-09-06 Weyerhaeuser Nr Company Lyocell nonwoven webs
US8263506B2 (en) 2008-06-30 2012-09-11 Weyerhaeuser Nr Company Nonwoven lyocell fiber webs for filtration
US8191214B2 (en) 2008-12-31 2012-06-05 Weyerhaeuser Nr Company Method for making lyocell web product
US8318318B2 (en) 2008-12-31 2012-11-27 Weyerhaeuser Nr Company Lyocell web product

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Wischtester Fasertucher 2013", TYPE S03003-001, MACH.-NR.: 001, December 2013 (2013-12-01)
HAYHURST M J: "SPUNBOND CELLULOSE", CHEMICAL FIBERS INTERNATIONAL,, vol. 56, no. 6, 1 June 2006 (2006-06-01), pages 386, 388 - 390, 393, XP001503726, ISSN: 0340-3343 *

Similar Documents

Publication Publication Date Title
US11613097B2 (en) Continuous filament cellulose nonwoven made with multiple bonding techniques
US8191214B2 (en) Method for making lyocell web product
US8318318B2 (en) Lyocell web product
KR102270876B1 (ko) 흡수성 적층체 및 그 제조 방법
US20100167029A1 (en) Lyocell Web Product
US20100162541A1 (en) Method for Making Lyocell Web Product
CN115103937B (zh) 复合无纺织物以及用于制造复合无纺织物的方法
WO2018184046A1 (fr) Matériau non tissé conçu pour être utilisé en tant que milieu filtrant
WO2018184048A1 (fr) Bande non tissée conçue pour être utilisée comme substrat de lingettes
US20030232553A1 (en) Nonwoven material and method for its production
WO2018184040A1 (fr) Bande non tissée conçue pour être utilisée dans une lingette de nettoyage et de désinfection
WO2018184049A1 (fr) Matériau non tissé conçu pour être utilisé dans des applications d'hygiène
WO2018184043A1 (fr) Bande non tissée conçue pour être utilisée dans une lingette de salle blanche
WO2018184041A1 (fr) Bande non tissée conçue pour utilisation dans un masque facial de beauté
WO2018184047A1 (fr) Bande non tissée conçue pour être utilisée dans une serviette de soins
WO2018184039A1 (fr) Bande non tissée conçue pour être utilisée comme feuille de séchage
WO2018184042A1 (fr) Bande non tissée conçue pour être utilisée dans une lingette de nettoyage industrielle
WO2018184044A1 (fr) Bande non tissée conçue pour être utilisée dans une lingette de nettoyage de sol humide
CN112041496B (zh) 无纺布及其制造方法
WO2018184050A1 (fr) Bande non tissée conçue pour être utilisée dans un produit de traitement des plaies
JPH10131022A (ja) 拭き布及びその製造方法
EP1516081A1 (fr) Etoffe non tissee et son procede de fabrication
WO2018184045A1 (fr) Bande non tissée conçue pour être utilisée en tant que milieu filtrant d'huile de cuisson à chaud
WO2018184051A1 (fr) Matériau non tissé conçu pour être utilisé dans des structures de cœurs absorbants ayant des capacités d'acquisition/distribution intrinsèques
JPH11100764A (ja) 不織布およびその製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17734625

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17734625

Country of ref document: EP

Kind code of ref document: A1