WO2019193201A1 - Textile non-tissé - Google Patents

Textile non-tissé Download PDF

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Publication number
WO2019193201A1
WO2019193201A1 PCT/EP2019/058806 EP2019058806W WO2019193201A1 WO 2019193201 A1 WO2019193201 A1 WO 2019193201A1 EP 2019058806 W EP2019058806 W EP 2019058806W WO 2019193201 A1 WO2019193201 A1 WO 2019193201A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
fibers
fibrous nonwoven
web
nonwoven web
Prior art date
Application number
PCT/EP2019/058806
Other languages
English (en)
Inventor
Thomas Maier
Rüdiger Irk
Original Assignee
Lenzing Aktiengesellschaft
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 Aktiengesellschaft filed Critical Lenzing Aktiengesellschaft
Priority to EP19715108.7A priority Critical patent/EP3775345A1/fr
Priority to CN201980037331.3A priority patent/CN112204185A/zh
Priority to US17/045,223 priority patent/US20210222335A1/en
Publication of WO2019193201A1 publication Critical patent/WO2019193201A1/fr

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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
    • 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
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/26—Wood pulp
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/492—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/498—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/02—Synthetic cellulose fibres
    • D21H13/08—Synthetic cellulose fibres from regenerated cellulose
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • the present invention relates to a fibrous nonwoven web, a method for its preparation as well as to uses of the novel fibrous nonwoven web.
  • Fibrous nonwoven webs are employed in a wide variety of technical fields, from flushable toilet paper and baby wipes to industrial wipes. These nonwoven fabrics often employ pulps as well as viscose fibers. If a higher mechanical strength is required thermoplastic binders, which may be in powder or fibrous shape as well as reinforcing fibers are employed as it is considered as impossible to ensure the required strength without using these components.
  • US 4,755,421 discloses a nonwoven fibrous web, comprising cellulosic fibers as well as pulp fibers, typically in a weight ratio of (5 to 30):(95 to 70).
  • the web is designed to be employed as flushable toilet paper, i.e. the web is intended to be disintegrated in water under mild agitation conditions.
  • the cellulosic fibers are rayon fibers having a titer of from 3.3 to 6.7. The pulp is not specified any further.
  • US 6,287,419 discloses a water decomposable nonwoven fabric including first and second regenerated cellulosic fibers and a natural fiber. These different fibers are characterized by means of their fiber lengths and the natural fiber preferably is a pulp fiber. If an increase of mechanical properties is desired, US 6,287,419 emphasizes the importance of employing binder resins.
  • EP 2 441 869 discloses a water disintegrable fiber sheet, comprising two different types of pulp, a fibrillated cellulose and a regenerated cellulose fiber. These sheets are intended to be used as simple wipes for one time use and are designed to disintegrate mild agitation conditions, such as the flushing of a toilet, so that they can be easily disposed after use.
  • US 2004/0013859 discloses a fibrous nonwoven web material comprising manmade cellulose fibers, natural cellulose fibers and synthetic binder fibers. Again the web is intended to be disintegrated by mild agitation conditions, such as the flushing of a toilet, so that the wipes produced from this web can be easily disposed after use.
  • These prior art approaches while providing serviceable wipes, often suffer from the drawback that at least three different fiber materials are to be employed, or that synthetic binder materials, such as synthetic fibers are required to provided sufficient mechanical strength. The use of such synthetic fibers has a detrimental effect on the sustainability of the product, as for example petroleum based materials are used as binder materials.
  • WO 201 1 ⁇ 046478 A1 discloses a flushable moist wipe or hygiene tissue.
  • This tissue is a nonwoven material containing pulp fibrous and man-made fibres and ⁇ or natural fibres.
  • WO 2014 ⁇ 092806 A1 discloses a method for production of a hydro-entangled air laid web and products obtained therefrom. The products include natural cellulose fibers by the as well as stable fibers.
  • WO 2013 ⁇ 015735 A1 discloses a flushable moist wipe or hygiene tissue and a method for making it.
  • the tissue comprises pulp fibres as well as poly lactic acid fibres the US 2008 ⁇ 0268205 A1 discloses a disposable nonwoven web having at least 3 layers.
  • WO 2013 ⁇ 067557 A1 discloses disposable nonwoven fabrics comprising pulp and solvent spun cellulosic fibres.
  • the respective measures are in the range of from 50 to 120 g/m 2 and from 10 to 80 N/5cm. With such webs water retention values (WRV) and liquid absorption capacities (LAC) of from 10 to 50% and from 350 to 1000 %, respectively, can be achieved. It is however interesting to note that even the low strength webs, used as baby wipes, do employ synthetic fibers, such as polyester fibers, polyolefin fibers etc. so that even those products for which rather low or intermediate levels of mechanical strength properties are required, are not 100% based on materials produced from renewable sources and introduce synthetic non-biodegradable materials into the waste treatment systems. It therefore seems that the market demands in relation with mechanical properties so far cannot be answered by webs bases exclusively on cellulosic materials.
  • one essential component of the web of the present invention is a pulp.
  • This pulp may be of any origin, as long as the requirements as outlined in claim 1 are met, in particular the fiber length of from 1.5 to 5 mm, preferably from 2 to 5 mm, and in particular from 2.2 to 2.8 mm, such as from 2.4 to 2.6 mm.
  • the pulp may be a bleached or unbleached pulp, and preferably the pulp has a fines content (LWL (%)) of from 1 to 5, preferably 2 to 4, more preferably 2.5 to 3.5.
  • LWL fines content
  • the pulp may have a coarseness (mg/100m) of from 5 to 25, preferably 8 to 20, more preferably from 10 to 15, such as from 12 to 14.
  • a particular preferred pulp material has a fiber length (LWL, mm) of from 2.2 to 2.8 mm, a fiber coarseness of from 10 to 15 and a fines content of from 2.5 to 3.5.
  • Such a pulp is commercially available at low costs and contributes to the overall commercial feasibility of the fibrous web of the present invention.
  • a second essential component of the web of the present invention is a lyocell fiber having a length of from 5 to 25 mm. Preferably the length is from 7 to 20 mm, and in particular from 8 to 15 mm, such as from 10 to 12 mm.
  • the lyocell fiber may be a standard fiber, a fiber containing a matting agent, a fibrillated fiber etc. As long as the fiber has a length as indicated above, the type of the lyocell fiber has no relevant influence on the essential product properties discussed further below.
  • the lyocell fiber has a titer in the range of from 0.9 to 3.3 dtex, more preferably from 1 .15 to 2.5 dtex, most preferably from 1 .3 to 2 dtex, such as 1.4 or 1.7 dtex.
  • a particular suitable lyocell fiber has a fiber length of from 8 to 15 mm and a titer of from 1.3 to 2 dtex.
  • Such fibers are commercially available, for example under the tradename LENZINGTM Lyocell Shortcut from the company Lenzing AG.
  • these two fiber types i.e. pulp and lyocell fiber
  • these two fiber components are the only fibrous components present in the web according to the present invention.
  • these two fiber components amount to 90 wt.-% or more, more preferably 95 wt-% or more, even more preferably 98 wt.-% or more of the web (based on the dry weight of the web).
  • the fibrous nonwoven web according to the present invention contains only pulp and lyocell fibers, and any unavoidable processing additives.
  • the web may also contain additional components, in amounts of typically not exceeding 10 wt.-% in total, such as other types of cellulose based fibers, including viscose fibers, fibers made from cellulose derivatives, such as carboxymethyl cellulose etc., other fibers based on natural and/or renewable resources, such as hemp fibers etc., and in embodiments also synthetic fibers.
  • additional components in amounts of typically not exceeding 10 wt.-% in total, such as other types of cellulose based fibers, including viscose fibers, fibers made from cellulose derivatives, such as carboxymethyl cellulose etc., other fibers based on natural and/or renewable resources, such as hemp fibers etc., and in embodiments also synthetic fibers.
  • the web comprises only fibers based on natural and/or renewable resources, in particular only cellulose based fibers.
  • the product in accordance with the present invention does not compromise poly (lactic acid) fibres It is also prefered if the product in accordance with the present invention is a single layer product, as it is possible to obtain the desired mechanical properties even though using a high proportion of pulp fibres having a small fibre length without requiring the presence of additional layers which in the prior art sometimes are employed in order to strengthen the tissue or wipe product.
  • the weight ratio of pulp to lyocell fiber is as defined in claim 1 , with the pulp fibers amounting to at least 35%, preferably at least 40% and in particular 50% or more, based on the weight of pulp and lyocell fibers.
  • this weight ratio is from 90:10 to 50:50, more preferably from 85: 15 to 55:45.
  • Particularly suitable weight ratios are in the range of from 80:20 to 60:40, in embodiments 70:30.
  • the mixtures of pulp and lyocell enable the preparation of webs with the desired balance of properties, while maintaining cost effectiveness.
  • pulp and lyocell fibers are mixed thoroughly prior to the preparation of the web, to ensure a uniform admixture and uniform web properties.
  • a mixing typically involves mixing in an aqueous medium, preferably in water. Suitable mixing devices and mixing parameters (agitation, shear rate, amount of fibers in the aqueous medium) are known to the skilled person.
  • the fibrous nonwoven web in accordance with the present invention typically has a basis weight in the range of from 25 to 200 gsm, such as from 50 to 175 gsm, preferably from 60 to 150 gsm.
  • basis weights are usual in the field of fibrous webs employed for wipes, but the webs in accordance with the present invention do provide a unique combination of mechanical properties at these basis weights, without requiring the presence of synthetic reinforcing fibers or synthetic binders for high mechanical strength levels, or without requiring the use of mixtures of three or even more types of fibers, for lower mechanical strength levels.
  • Higher strength levels in accordance with the present invention are strength levels represented by tensile strength (MD, dry, N/Scm) of more than 50 and in embodiments up to 150 or more.
  • MD, dry, N/Scm tensile strength
  • the strength levels achieved by the present invention must be considered as extremely surprising, as all the high strength level materials know in the prior art, for similar but still lower strength levels, require the use of reinforcing and/or binder fibers, such as polyolefin or polyester fibers.
  • the present invention provides a fibrous nonwoven web, which is based in fiber materials which are biodegradable and which are furthermore based on natural, i.e. renewable/sustainable raw materials.
  • the use of petrochemical based materials is not required in accordance with the present invention and the lyocell fiber employed in the present invention is produced by a process which reuses to a great extend all chemicals employed, in particular the solvent required for dissolution and spinning, so that an overall green and sustainable product is provided by the present invention.
  • the starting materials pulp and lyocell fiber to be employed in the present invention are standard materials, the overall costs of the novel product can be maintained on a highly competitive level.
  • the present invention may be regarded as providing a module based system which, using only a small number of variables (see above) enables the production of a wide variety of products, without requiring the use of additional components, such as reinforcing fibers, agents to improve biodegradability etc.
  • the fibrous nonwoven web in accordance with the present invention with two- or three-dimensional structures, for example by embossing, by providing perforations etc., using methods known to the skilled person in the field of fibrous nonwoven webs.
  • the webs in accordance with the present invention allow the provision of such structures without detrimental effect on the mechanical properties (strength) of the webs. It has been found, as illustrated in the examples, that the provision of such structures improves other properties, such as oil uptake, so that high strength webs on accordance with the present invention do show promise in the field of industrial wipes, where so far only reinforced wipes have shown sufficient mechanical strength to allow the use in practice.
  • the webs in accordance with the present invention in any case do show very good balance of properties, in particular a good balance of mechanical properties (tensile strength) as well as properties relevant for the use, such as WRV and LAC. Webs in accordance with the present invention do show satisfactory LAC values of clearly above 400, in embodiments exceeding 600, typically in combination with WRV of above 50. This is a balance of use properties roughly equivalent to commercial wipes.
  • Tensile strength values for these webs in accordance with the present invention are typically higher than the values for the commercial wipes, as these typically show tensile strength values (for baby wipes and moist toilet paper) of up to 25 N/5cm (dry, MD) for low strength products and values of up to 80 N/5cm (dry, MD) for medium strength products.
  • the corresponding values for the webs of the present invention are up to 60 N/5cm (dry, MD) for low strength products and values of up to 150 N/5cm (dry, MD) for medium strength products.
  • the present invention enables, simply be employing two standard products (pulp and lyocell fiber) in the defined weight ratios, the provision of fibrous nonwoven webs with an overall improved balance of use (WRV, LAC) and mechanical (tensile strength) properties. This becomes even more pronounced when considering the high strength webs in accordance with the present invention. These again do show use properties similar to the commercial products, such as WRV and LAC, while achieving the required mechanical properties, in particular tensile strength values without requiring the addition of bonder and/or reinforcing fibers.
  • the present invention enables to tailor properties simply by adjusting the weight ratio of pulp to lyocell fiber as well as by adjusting the energy consumption during hydroentangling.
  • higher contents of lyocell fibers increase mechanical properties.
  • high strength webs in accordance with the present invention typically are webs with a higher basis weight, typically of 150 or more, with a weight ratio of pulp to lyocell fiber of from 80:20 to 40:60.
  • Webs with lower basis weights and weight ratios of pulp to lyocell fiber of from 70:30 to 90:10 typically are medium or low strength webs.
  • the use in particular of the lyocell fibers ensures that in combination with the pulp highly cost efficient webs can be provided which can be considered sustainable.
  • the use of the lyocell fibers also unexpectedly serves to increase the mechanical properties, in particular the tensile strength properties of the webs in accordance with the present invention.
  • the inventors have discovered that only the use of lyocell fibers, as for example compared to other regenerated cellulose fibers, such as viscose fibers, ensures the good mechanical properties.
  • Webs produced with viscose fibers instead of lyocell fibers does not enable the production of webs having strength levels achieved with the corresponding webs employing lyocell fibers (under identical production conditions and using otherwise identical mixtures with pulp). Therefore it is evident, that the present invention is based on a specific selection of raw materials, which males the achievement shown possible.
  • the fibrous nonwoven web in accordance with the present invention may be produced using a hydroentangling process. Such processes are known to the skilled person and conventional devices used for such processes may be use to prepare the webs of the present invention.
  • the process first involves the intimate mixing of pulp and lyocell fiber, which can be carried out in a pulper.
  • water is added to this mixture to ensure proper dispersion.
  • concentration such as a mixing chest. This ensures that the mixture can be pumped to the next stages of the process and that in particular that the mixture can be evenly distributed on a web required for forwarding the not yet entangled web to the hydroentangling station.
  • the prepared mixture slurry is provided to a distribution station, which distributes the mixture in the desired amount and width onto a moving belt.
  • the amount provided to the belt is adjusted in particular in relation with the target basis weight of the fibrous nonwoven web to be produced.
  • the belt is typically adapted to allow in particular a dewatering step, so that the distributed slurry yields the so called wet laid material. Additional stations which further remove water, such as vacuum stations, may be provided, which also typically ensure an improved uniformity of wet laid material. Subsequently, in typical processes further drying steps are carried out, for example by using steam heated can dryers or other conventional means for drying.
  • the dried wet laid webs may be wound onto rolls to forward same to the hydroentanglement step, it is however also possible to directly forward the wet laid webs in accordance with procedures known in the art to the hydroentanglement treatment, and of it is of course also possible to omit some or all of the drying steps, when directly forwarding the wet laid webs to the hydroentanglement.
  • a usual continuous process does not include a drying step before the hydroentangling step.
  • a de-watering step typically including a vacuum de-watering step, is usual for such continuous processes.
  • Hydroentanglement may be carried out using water beams or jets, which are arranged either on one side of the web to be entangled or on both sides of the web to be entangled.
  • the number of water beams is not critical but two or more beams are conventional.
  • Processes employing in total four water beams, preferably two on each side of the web, have shown to be highly suitable to produce the fibrous nonwoven webs of the present invention.
  • Process conditions during entanglement may be selected among usual conditions known to the skilled person, such as water pressures, etc.
  • the so called energy consumption (sometimes referred to spunlacing energy consumption) is a good measure to ensure that the desired target values in the fibrous nonwoven webs are achieved.
  • This energy consumption (relating to the water beams) is a theoretical value given in kWh/kg (of dry fibrous nonwoven web) calculated on the basis of water pressure, production speed and basis weight. The calculation can be done based on the principles published in Vliesstoffe, W.AIbrecht, H. Fuchs, W.Kittelmann (Ed.), Wiley-VCH 2000, page 329, equation (23).
  • energy consumption values in the range of from 0.05 to 1 kWh/kg are suitable in the present invention. It should however be understood that higher and/or lower values are not excluded, but that the values given above are typical values, which are given here as means of illustration, taking also the specific conditions as employed in the examples, described below, into account. Suitable ranges for the energy consumption are in particular values of from 0.1 to 0.9 kWh/kg. As already indicated above, an adjustment of energy consumption under due consideration of the basis weight and weight ratio of pulp to lyocell fiber can tailor the mechanical properties of the web produced.
  • tensile strength values (dry, MD) of above 250 N/5cm can be obtained using an energy consumption of 0.3659 kWh/kg.
  • Lower tensile strength values are obtained with lower energy consumption, for example less than 250 N/5cm at 0.1464 kWh/kg.
  • tensile strength values (dry, MD) of about 170 and about 150 N/5cam, respectively can be obtained with a basis weight of 170 gsm but a ration of pulp to lyocell fiber of 80:20.
  • the energy consumption may be adjusted easily by changing production speed (speed of the moving belt moving the wet laid web through the hydroentangling station) and/or by changing the water pressure during hydroentangling.
  • production speed speed of the moving belt moving the wet laid web through the hydroentangling station
  • water pressure during hydroentangling.
  • the webs after having been entangled may be subjected to any desired post processing steps, such as de-watering treatments and drying treatments, employing for example vacuum de-watering units and/or through air drying units etc.
  • the web may then be wound on a roll to be shipped to further processing steps, such as cutting to a desired size, application of additives, such as lotions for cosmetic wipes, etc.
  • the webs in accordance with the present invention may be provided with two- or three-dimensional structures by embossing etc. Such processes are known to the skilled person and the respective process steps may be provided at any suitable stage of the process described above.
  • LAC values were determined according to DIN 53923
  • Pulp (Canfor ECF 90 bleached pulp) having a fiber length of 2.4 to 2.6 mm, a coarseness of 12 to 14 mg/100m and a fines content of 3 wt.-% was mixed in the rations further illustrated below with LENZINGTM Lyocell Shortcut fibers 1 7dtex/10mm bright and 1 4dtex/10mm bright. If the Examples do not specifically identify the lyocell fibers employed those identified above with the titer of 1 4dtex were used.
  • Substrates were laid using a wet laid line of PILL Nassvliestechnik GmbH (1 - harshige Pilo- Schragsiebstrom NVLA-58), dewatered, dried and wound on a roll. This roll was then unwound to deliver the not yet entangled web material to a spunlacing (hydroentangling) line comprising a pre-wetting unit, two water beams on the top side of the web and then two water beams on the bottom side of the web, vacuum boxes for dewatering and a through air dryer for drying the spunlaced material.
  • a spunlacing (hydroentangling) line comprising a pre-wetting unit, two water beams on the top side of the web and then two water beams on the bottom side of the web, vacuum boxes for dewatering and a through air dryer for drying the spunlaced material.
  • the following fibrous nonwoven webs were produced: a.) Basis weight 170 gsm, weight ratio pulp to lyocell fiber 40/60
  • the webs were hydroentangled with different energy consumptions of 0.1464 kWh/kg (a’.)), 0.1746 kWh/kg (b’.)), 0.2614 kWh/kg (c’.)), 0.31 18 kWh/kg (d’.)), 0.3659 kWh/kg (e’.)) and 0.4366 kWh/kg (f .)) respectively.
  • additional webs were prepared according to the following: d.1 ) to d.3.) Basis weight 60 gsm, weight ratio pulp to lyocell fiber 60/40, 70/30 and 80/20 e.1 ) to e.3.) Basis weight 80 gsm, weight ratio pulp to lyocell fiber 60/40, 70/30 and 80/20 f .1 ) to f.3.) Basis weight 100 gsm, weight ratio pulp to lyocell fiber 60/40, 70/30 and 80/20
  • the webs were hydroentangled with an energy consumption of 0.4136 kWh/kg (g’.)).
  • the webs did show a favorable combination of high LAC values and highly satisfactory mechanical properties.
  • additional fibrous nonwoven webs in accordance with the present invention were prepared. These were compared to a high quality industrial wipe with a basis weight of about 95 gsm, tensile strength values of about 96 N/5cm (dry as well as wet, due to the high content of PET fibers in thin industrial wipe a negligible difference between dry and wet state is to be expected). This wipe did show an oil uptake value of approximately 800%.
  • the fibrous nonwoven webs of the present invention were evaluated in relation with their oil uptake capability.
  • the fibrous nonwoven webs of the present invention did show oil uptakes of more than 800%, with values of about 900% for the embossed webs and values of about 1 100% for the perforated webs. These values are even higher than those measured for the high quality commercial industrial wipe, again proving the unexpected superiority of the present invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne un textile non-tissé, un procédé pour sa préparation ainsi que des utilisations de la nouvelle bande de non-tissé fibreux.
PCT/EP2019/058806 2018-04-06 2019-04-08 Textile non-tissé WO2019193201A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19715108.7A EP3775345A1 (fr) 2018-04-06 2019-04-08 Textile non-tissé
CN201980037331.3A CN112204185A (zh) 2018-04-06 2019-04-08 纤维非织造网
US17/045,223 US20210222335A1 (en) 2018-04-06 2019-04-08 Fibrous nonwoven web

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18166170.3 2018-04-06
EP18166170.3A EP3550062A1 (fr) 2018-04-06 2018-04-06 Bande non tissée fibreuse

Publications (1)

Publication Number Publication Date
WO2019193201A1 true WO2019193201A1 (fr) 2019-10-10

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ID=61913028

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Application Number Title Priority Date Filing Date
PCT/EP2019/058806 WO2019193201A1 (fr) 2018-04-06 2019-04-08 Textile non-tissé

Country Status (4)

Country Link
US (1) US20210222335A1 (fr)
EP (2) EP3550062A1 (fr)
CN (1) CN112204185A (fr)
WO (1) WO2019193201A1 (fr)

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US20210222335A1 (en) 2021-07-22
CN112204185A (zh) 2021-01-08
EP3550062A1 (fr) 2019-10-09

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