EP3580382B1 - Matériau non tissé dispersible multicouche - Google Patents

Matériau non tissé dispersible multicouche Download PDF

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Publication number
EP3580382B1
EP3580382B1 EP18706289.8A EP18706289A EP3580382B1 EP 3580382 B1 EP3580382 B1 EP 3580382B1 EP 18706289 A EP18706289 A EP 18706289A EP 3580382 B1 EP3580382 B1 EP 3580382B1
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EP
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Prior art keywords
nonwoven
fabric material
nonwoven fabric
embossing
fibers
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EP18706289.8A
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German (de)
English (en)
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EP3580382A1 (fr
Inventor
Avinav G. Nandgaonkar
Pramod U. Shanbhag
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Suominen Oyj
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Suominen Corp
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    • 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
    • D04H1/42—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
    • D04H1/4282—Addition polymers
    • D04H1/4309—Polyvinyl alcohol
    • 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
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/435—Polyesters
    • 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
    • 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
    • D04H1/48—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 in combination with at least one other method of consolidation
    • D04H1/49—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 in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • 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
    • D04H1/54—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
    • 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

Definitions

  • the present invention relates to products which are flushable, that is disposable through a water closet system without risk of clogging sewer pipes. More particularly, the present invention relates to a nonwoven material having sufficient strength to be used in a pre-moistened state but also having dispersibility properties which allow the product to be flushed.
  • Ordinary toilet paper is designed for use in the dry state, and when flushed down the toilet it is readily disperses so as to flow down a properly draining sewer system without causing any blockage.
  • a moist tissue such as products used for e.g. baby care and personal hygiene must necessarily have further properties in order to be useful in the wet state in which they are delivered. These products must also be maintained in their pre-moistened state for a considerable time between manufacture and use. However, for obvious reasons it is often desirable to dispose of used wet wipes by flushing them down the toilet.
  • a wet strength agent is often added. Such agents may be a cause of insufficient disintegration properties. Though wet strength agents and water soluble adhesives at some point dissolve in water, the dispersibility of the product may not be fast enough to eliminate blockage risks.
  • Another approach to dispersability is the use of various fiber length compositions. Short fibers may provide good dispersability but do not provide the desired surface and "feel" characteristics that are required in wipes. Long fibers again are prone to accumulating on screens and the like in sewer systems, again leading to blockage problems.
  • EP 0 904 933 is disclosed a water-disintegratable wiping sheet comprising two webs both containing pulp fibers but of different composition, one web comprising water-swellable binder.
  • EP 2 627 229 is disclosed a moist wipe or hygiene tissue which has good strength properties and is readily dispersible.
  • the product comprises a hydraulically entangled nonwoven material impregnated with a wetting composition and has a defined composition of pulp and man-made and/or natural fibers; and it comprises at least two plies of nonwoven material held together by frictional forces without mechanical bonding or adhesive.
  • EP 2 148 950 is disclosed a dispersible nonwoven web having at least three layers of specified compositions of short and long fibers, and comprising a triggerable binder, the binder being one that is not soluble in the wetting composition but is dispersible or soluble in the aqueous conditions encountered in the flushing situation.
  • a dispersible wet wipe comprising at least a first layer which is preferably an uncreped air dried tissue web, and a second layer which may be a nonwoven web.
  • the material further comprises a triggerable binder and a wetting composition.
  • a dispersible absorbent product having a mechanically weakened multi-layered structure comprising at least two layers joined together in a staggered manner such that the mechanically weakened regions are not directly superimposed over each other.
  • the layers may be joined by applying pressure and/or heat, using adhesives or e.g. using ultrasonic bonding.
  • a nonwoven web comprising man-made fibers and pulp fibers, the former having a given proportion of fibers of a given length; and the web is weakened by providing compressed regions forming lines of weakness, causing the web to fail when subjected to defined stresses.
  • EP 1320458 also discloses the use of bicomponent fibers. These bicomponent fibers are hydroentangled first with wood pulp and synthetic fibers and then thermally fused at elevated temperature to increase the strength.
  • moist toilet tissue materials were designed to have sufficient wet strength for use and for dispensing.
  • the material may include synthetic fibers.
  • those fibers are longer in length as compared to wood pulp which causes problem of clogging, inefficient dispersion, and takes a longer time for full dispersion apart from the higher cost of those fibers.
  • Ion-sensitive water dispersible polymer provides in-use strength and disperses in water.
  • the dispersion of binder is highly dependent on the water hardness and temperature.
  • salt sensitive lotion and binder can be harmful to the skin.
  • the present invention provides a dispersible nonwoven material which avoids the use of binder and oil -based synthetic fiber.
  • the material comprises at least two nonwoven webs, at least one of which is hydroentangled.
  • Each of the individual webs comprise 50%-95% wood pulp and 5%-50% of short cut man-made fibers and/or natural fibers and has a basis weight of 20-100 gsm.
  • Each individual nonwoven web is highly dispersible because of its low basis weight.
  • the nonwoven webs are joined together by thermal or mechanical embossing, or a combination of these. When the at least two nonwoven webs are joined together by thermal and/or mechanical embossing, the collective wet strength of the joined nonwoven web is higher than that of the individual nonwoven webs.
  • the embossed, joined webs separate into individual webs after flushing and are again highly dispersible.
  • the material of the invention comprises at least two individual nonwoven web layers formed separately. At least one, preferably several of the webs is/are hydroentangled.
  • the hydroentanglement is carried out using wet laid technology with a composition of 50%-95% wood pulp and 5%-50% short cut fibers and/or natural fibers.
  • the short cut fibers of flushable wipes are man-made fibers which are non-thermoplastic.
  • Non-limiting examples of short-cut man-made fibers useful in the dispersible nonwoven material of the invention are regenerated cellulose, lyocell, viscose rayon, polylactic acid and polyvinyl alcohol.
  • the present invention avoids the use of any glass fiber and oil-based synthetic fibers such as polyester, nylon, polypropylene, polycarbonates, polyethylene, polyvinyl chloride, aramid, polyacrylate, and combinations thereof.
  • the natural fibers might be cotton, hemp, flax, linen, bamboo, sisal, jute, kapok, etc.
  • the fiber length of the short cut man-made fibers and/or natural fibers useful in the dispersible nonwoven material of the invention is in the range of 5mm to 15mm.
  • Each individual nonwoven web has a basis weight of 20 gsm to 100 gsm.
  • Each individual nonwoven web preferably has a wet strength of 100 g/50mm to 600 g/50mm.
  • the two nonwoven webs are dried (using e.g. drying cans) and then joined together by thermal or mechanical embossing.
  • the thermal/mechanical embossing holds the two nonwoven webs together in the presence of the wetting solution.
  • the composite web has a significantly higher strength than the individual webs.
  • the joined embossed fabric material provides sufficient in-use and dispensing strength to the product, but splits into its component webs and disperses fast after flushing down with mild agitation in water.
  • the dispersibility of the subject material is according to GD 3 guidelines; 50 to 100 % pass through after 5 min.
  • the final basis weight for the nonwoven material according to the present invention is in the range 40 to 120 gsm.
  • the wet strength in the conditions of use of the nonwoven according to the present invention is greater than 250 g/50mm.
  • Thermal embossing for the purpose of the present invention may advantageously be carried out at a pressure in the range of 40 to 90 N/mm 2 , using an embossing bonding area of 5% to 33% with continuous or discontinuous pattern, and a temperature range of 140 °C to 180 °C.
  • the embossing pressure may be about 60 N/mm 2 , and the temperature about 160 °C.
  • the bonding area is greater than 5%.
  • Embossing without elevated temperature can advantageously be carried out for the present invention with a pressure of 60 to 160 N/mm 2 and embossing bonding area of 5% to 33% with a continuous/discontinuous pattern.
  • the nonwoven fabric material according to the present invention is treated with a wetting liquid.
  • the wetting liquid may comprise about 98% water and about 2% preservative, for example Lonza Geogard 221.
  • wetting liquid is used in an amount not exceeding 2,5 times the weight of the dry nonwoven material per unit area.
  • the wetting liquid may further comprise additional agents such as emollients, viscosity modifier, natural or synthetic oil and fats, surfactants, antimicrobial agents, particulates, alcohol, salts, organic solvents, pharmaceutical agents such as dimethyl sulfoxide; odor control agents, detergents, silicones, fragrance, pH control agents, whitening agents and surface feel modifiers.
  • additional agents such as emollients, viscosity modifier, natural or synthetic oil and fats, surfactants, antimicrobial agents, particulates, alcohol, salts, organic solvents, pharmaceutical agents such as dimethyl sulfoxide; odor control agents, detergents, silicones, fragrance, pH control agents, whitening agents and surface feel modifiers.
  • Fig. 1 is a schematic representation of an embodiment of a process for preparing a nonwoven according to the present invention.
  • Stock is prepared in a headbox 1 and a first web 2 is laid wet according to procedures known to the person skilled in the art.
  • the web is laid on a plastic wire running at a speed of 2 to 4 m/s (400 - 800 feet/min) and transferred to the hydroentangling station where the fibrous structure is entangled using high pressure water jets 3.
  • the web is hydroentangled by 3 to 5 different consecutive nozzles with a water jet pressure of 2,75 - 5,5MPa (400-800 psi) and laid on top of a second wet laid web 4 prepared in an analogous manner using second headbox 5 and high pressure water jets 6 but not necessarily using identical parameters.
  • the combined web passes through drying station 7 and thermal or mechanical embossing station 8.
  • the wet laid webs 2, 4 have a composition of 50 - 95 % wood pulp fibers and 5 - 50 % shortcut fibers. The proportion of shortcut fiber to wood pulp fiber depends on the type of shortcut fiber used.
  • shortcut fibers are of flat cross-section and of short length, then a higher proportion of shortcut fiber is required, and if the fiber is of round cross -section and of long length, then the proportion of shortcut fiber will be low. Preferably, at least 20 % of shortcut fiber is used.
  • An example of wood pulp fiber which may be used in a nonwoven according to the invention is Grande Prairie ECF Northern Bleached Softwood.
  • An example of shortcut fiber which may be used in a nonwoven according to the invention is Danufil 1.7 dtex 8 mm from Kelheim Fibres GmbH, Germany. Cotton fiber is a further alternative to be used as shortcut fiber.
  • Figure 2 shows another embodiment of a process for preparing a nonwoven web according to the present invention.
  • the equipment shown includes headbox 9 and high pressure water jets 10, as well as drying station 11 and thermal or mechanical embossing station 12.
  • a wet laid and hydroentangled web 13 is laid on another web 14 which is unwound from reel 15, being previously formed and entangled and pre-wound.
  • the combined web is dried and embossed to form a nonwoven according to the present invention.
  • two preformed and pre-entangled webs may be unwound and embossed to form a nonwoven material according to the present invention.
  • Prototype samples were prepared using two hydroentangled sheets produced separately at 30 and 40 gsm each with entanglement pressure of 400, 400, and 500 psi which are then thermally joined together at a temperature of 160°C and a pressure of 60 N/mm 2 , with a continuous pattern having embossing bonding area of 24.4 %.
  • Table 1 shows the composition and ID (corresponding to fig. 3 ) of the samples prepared.
  • Table 1 Various nonwoven webs with different fiber composition and basis weights Composition Sample ID 20% Short Cut Fiber, 80% Wood - 30 gsm A1 20% Short Cut Fiber, 80% Wood - 40 gsm A2 30% Short Cut Fiber, 70% Wood - 30 gsm B1 30% Short Cut Fiber, 70% Wood - 40 gsm B2 20% Short Cut Fiber, 80% Wood - 60 gsm C 30% Short Cut Fiber, 70% Wood - 60 gsm D 20% Short Cut Fiber, 80% Wood - 40 gsm-No Entanglement E 100% Wood Pulp - No Entanglement 35 gsm
  • Figure 3 are shown the wet MD and CD strength profiles of various combinations of the webs of Table 1 joined together by thermal embossing.

Claims (7)

  1. Matériau de tissu non tissé évitant l'utilisation de liant et de fibre synthétique à base d'huile, ledit matériau comprenant au moins deux couches de voile non tissé, couches parmi lesquelles au moins l'une est hydroenchevêtrée, où chaque couche individuelle de voile non tissé a un grammage de 20 à 100 gsm et chaque couche individuelle de voile non tissé a une composition de 50 % à 95 % de pâte de bois et 5 % à 50 % de fibres synthétiques coupées courtes et/ou de fibre naturelle ayant une longueur dans la plage de 5 mm à 15 mm ; et où les au moins deux couches de voile non tissé ont été assemblées par gaufrage thermique, gaufrage mécanique ou une combinaison de ceux-ci, la zone de liage dans le gaufrage étant dans la plage de 5 % à 33 %.
  2. Matériau de tissu non tissé selon la revendication 1, dans lequel les fibres synthétiques coupées courtes sont choisies dans le groupe constitué de cellulose régénérée, de lyocell, de rayonne viscose, d'acide polylactique et d'alcool polyvinylique.
  3. Matériau de tissu non tissé selon la revendication 1, dans lequel les fibres naturelles sont choisies dans le groupe constitué de coton, de chanvre, de lin, de fil de lin, de bambou, de sisal, de jute et de kapok.
  4. Matériau de tissu non tissé selon la revendication 1, dans lequel la zone de liage dans le gaufrage est supérieure à 5 %.
  5. Matériau de tissu non tissé selon la revendication 1, comprenant en outre un liquide mouillant.
  6. Matériau de tissu non tissé selon la revendication 1, comprenant un liquide mouillant en une quantité ne dépassant pas 2,5 fois le poids du matériau non tissé sec par unité de surface.
  7. Matériau de tissu non tissé selon la revendication 1, dans lequel la résistance à l'état mouillé du matériau de tissu est supérieure à 250 g/50 mm.
EP18706289.8A 2017-02-08 2018-02-08 Matériau non tissé dispersible multicouche Active EP3580382B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762456196P 2017-02-08 2017-02-08
PCT/FI2018/050090 WO2018146384A1 (fr) 2017-02-08 2018-02-08 Matériau non tissé dispersible multicouche

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EP3580382A1 EP3580382A1 (fr) 2019-12-18
EP3580382B1 true EP3580382B1 (fr) 2020-11-25

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US (1) US20180223461A1 (fr)
EP (1) EP3580382B1 (fr)
WO (1) WO2018146384A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP3690136A1 (fr) * 2019-02-04 2020-08-05 Wepa Hygieneprodukte GmbH Matériau non tissé de fibres
EP3959367B1 (fr) * 2019-04-24 2024-04-10 Monosol, LLC Article non tissé hydrodispersable de conditionnement de dose unitaire
CN110373812A (zh) * 2019-08-06 2019-10-25 深圳全棉时代科技有限公司 一种气刺生产功能非织造布的方法
CN111893639B (zh) * 2020-08-11 2021-07-20 湖南工程学院 一种木棉油茶饼粕洗洁巾制备方法

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AU708587B2 (en) * 1996-06-13 1999-08-05 Kimberly-Clark Worldwide, Inc. Water-dispersible wet wipe
JP3566044B2 (ja) 1997-09-24 2004-09-15 ユニ・チャーム株式会社 水解性の繊維シート及びそれが重ねられた拭き取り用シート
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US20180223461A1 (en) 2018-08-09
EP3580382A1 (fr) 2019-12-18
WO2018146384A1 (fr) 2018-08-16

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