WO2020079083A1 - Non tissé biodégradable contenant de la pâte à papier et procédé de production d'un tel non tissé - Google Patents

Non tissé biodégradable contenant de la pâte à papier et procédé de production d'un tel non tissé Download PDF

Info

Publication number
WO2020079083A1
WO2020079083A1 PCT/EP2019/078089 EP2019078089W WO2020079083A1 WO 2020079083 A1 WO2020079083 A1 WO 2020079083A1 EP 2019078089 W EP2019078089 W EP 2019078089W WO 2020079083 A1 WO2020079083 A1 WO 2020079083A1
Authority
WO
WIPO (PCT)
Prior art keywords
biodegradable
fibers
woven fabric
wet
binder
Prior art date
Application number
PCT/EP2019/078089
Other languages
English (en)
Inventor
Henning RÖTTGER
Original Assignee
Glatfelter Gernsbach Gmbh
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=63878544&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2020079083(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Glatfelter Gernsbach Gmbh filed Critical Glatfelter Gernsbach Gmbh
Priority to EP19787262.5A priority Critical patent/EP3867435B1/fr
Priority to US17/286,374 priority patent/US20210340700A1/en
Priority to CN201980080916.3A priority patent/CN113227480B/zh
Priority to ES19787262T priority patent/ES2949666T3/es
Priority to CA3116792A priority patent/CA3116792A1/fr
Priority to PL19787262.5T priority patent/PL3867435T3/pl
Priority to RU2021113308A priority patent/RU2769362C1/ru
Publication of WO2020079083A1 publication Critical patent/WO2020079083A1/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
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B5/00—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating
    • D06B5/12—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through materials of definite length
    • D06B5/22—Forcing liquids, gases or vapours through textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing impregnating through materials of definite length through fabrics
    • 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
    • D04H1/44—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
    • D04H1/488—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 in combination with bonding agents
    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • 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
    • D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/04—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by applying or incorporating chemical or thermo-activatable bonding agents in solid or liquid form
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents
    • D21H21/20—Wet strength agents
    • 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 biodegradable non-woven fabric, a method for producing a biodegradable non-woven fabric and wipes or tissues comprising the biodegradable non-woven fabric.
  • the biodegradable non-woven fabric may be a plastic-free, entirely compostable non-woven fabric or substrate suitable for disposable applications, such as wipes or tissues.
  • Disposable wipes such as wet toilet wipes or personal care wipes like baby wipes, facial wipes etc. are very popular for cleaning the skin of human bodies or facilities in the household because of their comfort for consumers and efficacy in cleaning.
  • increasing concerns about plastic contamination of the environment create an increasing demand for plastic-free and fully
  • compostable/biodegradable substrates for disposable wipes and similar products for disposable wipes and similar products.
  • Spunlacing (which may also be referred to as hydroentanglement) and needle punching are technologies conventionally used for producing non-woven fabric or substrates suitable as wipes.
  • Spunlacing is a bonding process for wet or dry fibrous webs where fine, high pressure jets of water penetrate the fibrous web and cause an entanglement of fibers, thereby providing fabric integrity.
  • Needle punching is a bonding process where fibers are mechanically intertwined by needles.
  • Spunlace technology only using compostable fibers made of regenerated cellulose like Viscose/Rayon, Tencel or Cellulose Acetate or natural fibers like cotton provide a technical solution for plastic-free and
  • compostable/biodegradable disposable wipes but is challenged by the significant increase of material cost by replacing PET fibers commonly used in disposable wipe substrates (e.g. baby wipes) by compostable fibers at an up to 50% increase of material cost. Due to the too high material cost, such products so far have only been used in a niche premium segment but could not replace standard volume products like baby wipes.
  • Linting of pulp fibers results from the lack of integration of pulp fibers by bonding points to the matrix of the non-woven material resulting in fibers falling off the wipe during converting and use when the web is exposed to mechanical stress (bending, stretching, crunshing).
  • the loss of pulp fibers when using a wipe for cleaning purposes is limiting the field of potential applications and is considered by users as a product deficiency.
  • the present invention aims at overcoming the above described problems and drawbacks.
  • mechanical properties (such as strength and/or resiliency) of a non-woven fabric made by mechanically entangling a blend of pulp fibers and biodegradable fibers may be improved by (i) adding a biodegradable binder potentially including softening agents like glycerol after formation of an entangled textile structure from biodegradable fibers and pulp fibers, by (ii) adding a preferably
  • compostable wet-strength agent prior to the head box before formation of a textile structure from biodegradable fibers and pulp fibers, and/or by (iii) blending biodegradable binder fibers (in particular biodegradable thermobonding fibers) to a fiber blend comprising biodegradable fibers and pulp fibers, these objects can be solved.
  • biodegradable binder fibers in particular biodegradable thermobonding fibers
  • biodegradable thermobonding fibers in particular biodegradable thermobonding fibers
  • a pulp-web-structure may be formed which is integrated into (or embedded in) the structure of entangled biodegradable fibers such that a structure is created where the pulp fibers may not substantially move within the entangled fiber structure even after exposure to a liquid, such as water, and crumpling the web or applying mechanical strength to the web.
  • a liquid such as water
  • biodegradable fibers and pulp fibers as well as the content of wet-strength agent, binder and/or binder fiber, it may be possible to properly adjust the material properties in a wide range and to avoid pulp fibers moving and clumping after exposing the substrate to liquid/water and tailoring the desired web-strength and resiliency. This may allow the design of wipe substrates with similar properties like spunlace materials also in the wet state and replacing a high content of compostable fibers by much lower cost pulp fibers.
  • the present invention relates to a biodegradable non-woven fabric comprising biodegradable fibers and pulp fibers, wherein at least a part of the biodegradable fibers is entangled with each other (at least partly entrapping pulp fibers), and wherein at least a part of the pulp fibers is covalently bonded (fixed, adhered) to each other (together) by at least one of the group consisting of a biodegradable binder, a biodegradable wet-strength agent and a biodegradable binder fiber (thereby forming a pulp-web-structure integrated into the structure of entangled biodegradable fibers such that a structure is created where the pulp fibers form an integrated structure themselves and/or may not substantially individually move within the entangled fiber structure even after exposure to a liquid, such as water).
  • the present invention further relates to a method for producing a biodegradable non-woven fabric, comprising the steps of (a) forming a fibrous web from a fiber blend comprising biodegradable fibers and pulp fibers or forming a layer of biodegradable fibers on a tissue carrier, (b) entangling at least a part of the biodegradable fibers with each other (thereby enclosing at least a part of the pulp fiber) by subjecting the fibrous web (or layer of tissue/fibers) to a water-jet treatment, and (c) drying the entangled fibrous web (at a temperature sufficient to cure applied binders), wherein the method further comprises at least one (such as one, any two or all three) of the following steps: (i) applying a biodegradable binder to the entangled fibrous web prior to the drying step (c),
  • the present invention relates to a biodegradable non-woven fabric obtainable by a method for producing a biodegradable non-woven fabric as described herein.
  • the present invention relates to a wipe or tissue comprising or consisting of the biodegradable non-woven fabric as described herein.
  • the present invention relates to the use of a biodegradable binder, a biodegradable wet-strength agent and/or a biodegradable binder fiber for imparting resiliency to a wipe or tissue comprising a biodegradable non-woven fabric.
  • Figure 1 shows photographs of a reference sample subjected to a crumpling test wherein the photograph on the left-hand side illustrates a flat moistened sample prior to crumpling, the photograph in the middle illustrates the sample crumpled in a fist and the photograph on the right-hand side illustrates the sample after crumpling.
  • Figure 2 shows photographs of a sample of a biodegradable non-woven fabric according to an embodiment of the invention subjected to a crumpling test wherein the photograph on the left-hand side illustrates a flat moistened sample prior to crumpling, the photograph in the middle illustrates the sample crumpled in a fist and the photograph on the right-hand side illustrates the sample after crumpling.
  • Figure 3 illustrates an exemplary set-up for the 2-point bending stiffness measurements.
  • Figure 4 illustrates an exemplary set-up for the Circular Bend Force
  • the expression “comprising”, as used herein, includes not only the meaning of “comprising”, “including” or “containing”, but may also encompass “consisting essentially of” and “consisting of”. Unless specifically stated otherwise, the expression “at least a part of”, as used herein, may mean at least 5 % thereof, in particular at least 10 % thereof, in particular at least 15 % thereof, in particular at least 20 % thereof, in particular at least 25 % thereof, in particular at least 30 % thereof, in particular at least 35 % thereof, in particular at least 40 % thereof, in particular at least 45 % thereof, in particular at least 50 % thereof, in particular at least 55 % thereof, in particular at least 60 % thereof, in particular at least 65 % thereof, in particular at least 70 % thereof, in particular at least 75 % thereof, in particular at least 80 % thereof, in particular at least 85 % thereof, in particular at least 90 % thereof, in particular at least 95 % thereof, in particular at least 98 % thereof, and
  • the present invention relates to a biodegradable non-woven fabric.
  • non-woven fabric may in particular mean a web of individual fibers which are at least partially intertwined, but not in a regular manner as in a knitted or woven fabric.
  • biodegradable (which may also be referred to as “compostable”), as used herein, may in particular mean that the material concerned, such as the biodegradable non-woven fabric, the biodegradable fibers, the biodegradable binder fiber, the biodegradable wet-strength agent, the biodegradable binder and the like, complies at least with the requirements for industrial compostability, for instance in accordance with EN 13432, and preferably also with the requirements for home compostability and is most preferred also marine biodegradable.
  • marine biodegradable as used herein, may in particular mean that the material biodegrades by more than 90% by weight within 12 month storage in sea water at min. 15 °C and exposure to daylight.
  • the biodegradable non-woven fabric comprises biodegradable fibers and pulp fibers.
  • the biodegradable fibers comprise cellulosic fibers.
  • the term "cellulosic fibers”, as used herein, may in particular denote fibers based on cellulose, in particular modified or regenerated cellulose fibers, such as fibers prepared from cellulose, or cellulose derivates, such as ethyl cellulose, cellulose acetate and the like.
  • regenerated cellulose fibers as used herein, may in particular denote manmade cellulose fibers obtained by a solvent spinning process.
  • the regenerated cellulose fibers may be selected from the group consisting of viscose (rayon) or lyocell (tencel).
  • Viscose is a type of solvent spun fiber produced according to the viscose process typically involving an intermediate dissolution of cellulose as cellulose xanthate and subsequent spinning to fibers.
  • Lyocell is a type of solvent spun fiber produced according to the aminoxide process typically involving the dissolution of cellulose in N-methylmorpholine N- oxide and subsequent spinning to fibers.
  • the biodegradable fibers may have an average fiber length of from 1 mm to 100 mm, for instance an average fiber length of from 3 mm to 80 mm, for instance an average fiber length of from 5 to 70 mm, for instance an average fiber length of from 10 to 65 mm, for instance an average fiber length of from 15 to 60 mm, for instance an average fiber length of from 18 to 50 mm, such as an average fiber length of from 20 to 40 mm.
  • the biodegradable fibers may have an average fiber length of from 1 mm to 12 mm, in particular of from 3 mm to 10 mm. This may be advantageous, in particular when the non-woven fabric is prepared by an airlaid process. In an embodiment, the biodegradable fibers may have an average fiber length of from 1 mm to 12 mm, in particular of from 3 mm to 8 mm. This may be advantageous, in particular when the non-woven fabric is prepared by a wetlaid process.
  • the biodegradable fibers may have an average fiber length of from 10 mm to 100 mm, in particular of from 10 mm to 80 mm. This may be advantageous, in particular when the non-woven fabric is prepared by an airlay process.
  • the biodegradable fibers may have an average fiber length of from 15 mm to 60 mm. This may be advantageous, in particular when the non- woven fabric is prepared by a carding process.
  • the biodegradable fibers may have a fiber coarseness of from 0.5 to 10 dtex, in particular from 0.5 to 4.0 dtex or from 1.0 to 10 dtex, such as from 1.0 to 2.5 dtex.
  • the biodegradable fibers may be comprised in an amount of from 10 to 80 wt.-%, such as in an amount of from 15 to 70 wt.-%, such as in an amount of from 20 to 60 wt.-%, such as in an amount of from 25 to 50 wt.- %, such as in an amount of from 30 to 40 wt.-%, based on the total weight of the non-woven fabric.
  • the pulp fibers may be natural pulp fibers, in particular pulp fibers of natural origin, such as softwood pulp fibers or hardwood pulp fibers.
  • Pulp may in particular denote a (lignocellulosic) fibrous material prepared by chemically or mechanically separating cellulose fibers from wood or the like, such as by a kraft process (sulfate process).
  • the pulp fibers may have an average fiber length of from 1.0 mm to 4.0 mm, for instance from 1.5 mm to 3.5 mm, such as from 2.0 mm to 3.2 mm.
  • the pulp fibers may have a fiber coarseness of from 0.3 to 3.5 dtex, such as from 0.6 to 2.5 dtex.
  • the pulp fibers may be comprised in an amount of from 20 to 90 wt.-%, such as in an amount of from 30 to 85 wt.-%, such as in an amount of from 40 to 80 wt.-%, such as in an amount of from 50 to 75 wt.-%, such as in an amount of from 60 to 70 wt.-%, based on the total weight of the non-woven fabric.
  • At least a part of the biodegradable fibers is entangled with each other.
  • at least a part of the biodegradable fibers may be entangled with each other such that at least a part of the pulp fibers is entrapped (with)in the entangled biodegradable fibers.
  • biodegradable fibers are at least partly intertwined with each other, thereby imparting strength, such as tear strength or tensile strength, to the non-woven fabric.
  • Entangling of the biodegradable fibers might in particular be achieved by a treatment of a fibrous web with water jets, as will be explained in further detail below, which may also be referred to as “hydroentanglement” or “spunlacing” and the entangled fibers may thus also be referred to as “hydroentangled fibers” or “spunlaced fibers”.
  • entangling of the biodegradable fibers might be achieved by needle punching where the biodegradable fibers are mechanically intertwined by means of needles.
  • the layer of biodegradable fibers may also be formed on top of a layer of tissue using carding or airlay or airlaid technology and then be fed into the spunlacing unit which is disintegrating the tissue forming a web of at least partially entangled biodegradable fibers enclosing at least part of the pulp fibers.
  • the pulp fibers is covalently bonded (fixed, adhered) to each other (thereby forming an integrated pulp layer within the biodegradable spunlaced fiber structure) by at least one of the group consisting of a biodegradable binder, a biodegradable wet-strength agent and a biodegradable binder fiber.
  • a pulp-web-structure may be formed which is integrated into (or embedded in) the structure of entangled
  • biodegradable fibers such that a structure is created where the pulp fibers may not substantially move within the entangled fiber structure even after exposure to a liquid, such as water. Moreover, a clumping of pulp fibers may be
  • the bonding of the pulp fibers is preferably initiated by application of heat after entangling the biodegradable fibers by means of hydroentangling or needle punching.
  • At least one of the group consisting of a biodegradable binder, a biodegradable wet-strength agent and a biodegradable binder fiber may optionally, but not necessarily, also bond the biodegradable fibers, in particular the entangled biodegradable fibers, together and may optionally, but not necessarily, also bond pulp fibers to the
  • biodegradable fibers in particular to the entangled biodegradable fibers.
  • the (large) majority of the at least one of the group consisting of a biodegradable binder, a biodegradable wet-strength agent and a biodegradable binder fiber bonds the pulp fibers together (rather than bonding to the biodegradable fibers) thereby forming a pulp-web-structure which may also (but does need to) bond to the structure of entangled biodegradable fibers.
  • the increase in bulkiness due to the formation of a pulp-web-structure and the resulting integration or embedding thereof within the structure of entangled biodegradable fibers is believed sufficient (even without bonding to the biodegradable fibers) for substantially limiting a free movement of the pulp within the entangled fiber structure even after exposure to a liquid, such as water, and for substantially avoiding extraction and/or clumping.
  • the formation of a layer of inter-bonded pulp fibers within the structure of entangled biodegradable fibers may increase the resiliency of the material.
  • the pulp fibers is bonded to each other by a biodegradable binder fiber.
  • the term "binder fiber”, as used herein, may in particular denote a fiber that is able to bind (e.g. by thermobonding, by forming covalent bonds, by ionic interactions or the like) to each other or to other fibers.
  • the biodegradable binder fiber is a biodegradable thermobonding (or thermally activatable) fiber.
  • the biodegradable binder fiber may in particular be a biodegradable thermoplastic fiber.
  • thermoplastic fibers may in particular denote fibers that soften and/or partly melt when exposed to heat and are capable to bind with each other or to other non- thermoplastic fibers, such as cellulose fibers, upon cooling and resolidifying.
  • the biodegradable binder fiber comprises a multicomponent fiber, in particular a bicomponent fiber, such as bicomponent fibers of the sheath-core type.
  • Bicomponent fibers are composed of two sorts of polymers having different physical and/or chemical characteristics, in particular different melting characteristics.
  • a bicomponent fiber of the sheath-core type typically has a core of a higher melting point component and a sheath of a lower melting point component.
  • the biodegradable binder fiber may comprise polylactic acid (PLA), polybutylene succinate (PBS), polybutyratadipate terephthalate (polybutylene adipate terephthalate, PBAT), and other biodegradable thermoplastic polymers. Combinations of two or more thereof may also be applied.
  • the biodegradable binder fiber may be comprised in an amount of from 0.1 to 30 wt.-%, such as in an amount of 0.2 to 20 wt.-%, such as in an amount of from 0.2 to 10 wt.-%, such as in an amount of from 0.2 to 7.5 wt.-%, such as in an amount of from 0.35 to 5 wt.-%, such as in an amount of from 0.5 to 4 wt.-%, based on the total weight of the non-woven fabric.
  • At least a part of the pulp fibers is bonded to each other by a biodegradable wet-strength agent.
  • the term "wet-strength agent”, as used herein, may in particular denote an agent that improves the tensile strength of the non-woven web in the wet state, for instance by forming covalent bonds.
  • the wet-strength agent is biodegradable.
  • biodegradability/compostability which may significantly increase the wet tensile strength of the non-woven fabric.
  • the biodegradable wet-strength agent may be selected from the group consisting of chitosan, modified starch, cellulose derivatives and others. Combinations of two or more thereof may also be applied.
  • cellulosic derivatives as used herein, may in particular denote chemically modified (for instance methylated, ethylated, hydroxypropylated, acetylated and/or
  • carboxylated cellulose compounds may in particular include cellulose ethers and cellulose esters, such as methylcellulose, ethylcellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose or cellulose acetate.
  • the biodegradable wet-strength agent may be comprised in an amount of from 0.1 to 3 wt.-%, such as in an amount of from 0.2 to 2 wt.-%, such as in an amount of from 0.35 to 1.5 wt.-%, such as in an amount of from 0.5 to 1 wt.-%, based on the total weight of the non-woven fabric.
  • the biodegradable non-woven fabric may comprise a further wet-strength agent, in particular a non-biodegradable wet-strength agent.
  • a further wet-strength agent may include an epichlorhydrine resin, such as a polyamine-polyamide-epichlorohydrine resin.
  • at least a part of the pulp fibers is bonded to each other by a biodegradable binder.
  • the term "binder”, as used herein, may in particular denote a chemical compound that is able to bind (e.g. by forming covalent bonds, by ionic interactions or the like) to two or more fibers, thereby
  • the biodegradable binder may be selected from the group consisting of:
  • biodegradable binders consisting of chitosan, modified starch, cellulose derivatives, in particular blends of carboxymethylcellulose and citric acid, protein based binders, such as casein, and others. Combinations of two or more thereof may also be applied. Further suitable biodegradable binders are disclosed in WO 2014/117964 Al, the disclosure of which is incorporated herein by reference.
  • the biodegradable binder may be comprised in an in amount of from 0.05 to 5 wt.-%, such as in an amount of from 0.1 to 4 wt.-%, such as in an amount of from 0.25 to 3 wt.-%, such as in an amount of from 0.5 to 2 wt.- %, based on the total weight of the non-woven fabric.
  • the biodegradable binder further comprises an additive, such as glycerol, (configured for) acting as softening agent improving the flexibility and drapability of the (dried treated) non-woven fabric.
  • an additive such as glycerol, (configured for) acting as softening agent improving the flexibility and drapability of the (dried treated) non-woven fabric.
  • glycerol or similar softening additives may be added to the biodegradable binder or wet- strength agent in order to improve the flexibility and drapability of the dried treated non-woven fabric.
  • a wet-strength agent within the meaning of the present application and a binder within the meaning of the present application may in particular be distinguished by the time of its application.
  • a wet-strength agent is typically added to a fiber blend prior to formation of a fibrous web or textile structure.
  • a wet- strength agent may be applied into or prior to a head box of a paper-making machine.
  • a binder is typically applied after formation of a fibrous web or textile structure, and may even be applied after entanglement of the fibrous web.
  • a binder may be applied or added to an entangled fibrous web, but preferable prior to drying the entangled web. It is also feasible to apply the binder after drying the hydroentangled web but this would be less efficient due to the necessity of drying the web twice.
  • a binder fiber may be added to the blend of the other fibers prior to formation of a fibrous web or textile structure.
  • At least a part of the pulp fibers may be bonded to each other by a biodegradable wet-strength agent and/or by a biodegradable binder, and optionally further by a biodegradable binder fiber.
  • At least a part of the pulp fibers may be bonded to each other only by a biodegradable wet- strength agent; at least a part of the pulp fibers may be bonded to each other only by a biodegradable binder; at least a part of the pulp fibers may be bonded to each other by a biodegradable wet-strength agent and by a biodegradable binder; at least a part of the pulp fibers may be bonded to each other by a biodegradable wet-strength agent and by a biodegradable binder fiber; at least a part of the pulp fibers may be bonded to each other by a biodegradable binder and by a biodegradable binder fiber; and/or at least a part of the pulp fibers may be bonded to each other by a biodegradable binder, by a biodegradable wet- strength agent and by a biodegradable binder fiber.
  • substantially all fibers comprised in the biodegradable non- woven fabric may be biodegradable fibers, in particular substantially all fibers comprised in the biodegradable non-woven fabric may be the biodegradable fibers, the pulp fibers and optionally the biodegradable binder fiber described herein.
  • the biodegradable non-woven fabric does substantially not comprise any other fibers than biodegradable fibers, in particular no other fibers than the biodegradable fibers, the pulp fibers and optionally the biodegradable binder fiber described herein.
  • other fibers than biodegradable fibers may still be present in relatively minor amounts of up to 10, up to 5, up to 3, up to 2, or up to 1 wt.-% based on the total weight of the non-woven fabric.
  • the biodegradable non-woven fabric may have a grammage or basis weight of from 20 to 150 g/m 2 , such as from 30 to 125 g/m 2 , such as from 40 to 100 g/m 2 , such as from 50 to 80 g/m 2 .
  • the non-woven fabric is non-dispersible in water, rather than dispersible.
  • the term "dispersible” may in particular denote the property of a non-woven fabric to be capable of disintegrating or decomposing in water by applying a relatively low mechanical energy, such as a situation that typically occurs in a toilet upon flushing.
  • a dispersible non-woven fabric may be no longer intact, for instance a certain amount of individual fibers or of fiber aggregates may be released from the fabric and/or the fabric may break to several pieces.
  • non-dispersible may accordingly denote the property of the non-woven fabric to be capable of resisting to disintegration in water upon applying a relatively low mechanical energy, such as a situation that typically occurs in a toilet upon flushing.
  • the non-woven fabric may be treated (impregnated) with a liquid or a lotion.
  • the non-woven fabric may further comprise a liquid or a lotion.
  • the non-woven fabric may in particular represent a wet wipe or wet tissue.
  • the liquid or the lotion is not particularly limited, and any liquid or lotion customary in the field of wet wipes or wet tissues may be applied.
  • the liquid or the lotion may comprise a solvent, such as water, an alcohol, or mixtures thereof, surfactants or detergents, skin care agents, emollients, humectants, perfumes, preservatives etc. depending on the intended use.
  • the biodegradable non-woven fabric shows an increase of material resiliency characterized by a Circular Bend Stiffness Force determined in accordance with modified ASTM D 4032-94 as described further below of more than 25%, preferably more than 50% and most preferably more than 75%, compared to a non-woven fabric without any one of a biodegradable binder fiber, a biodegradable wet-strength agent and a biodegradable binder.
  • the biodegradable non-woven fabric shows an increase of material resiliency characterized by a bending stiffness in machine direction (MD) and/or in cross direction (CD) determined in accordance with modified ISO 5628 (DIN 53 121) as described further below of more than 25%, preferably more than 50% and most preferably more than 75%, compared to a non-woven fabric without any one of a biodegradable binder fiber, a biodegradable wet-strength agent and a biodegradable binder.
  • MD machine direction
  • CD cross direction
  • the present invention relates to a method for producing a biodegradable non-woven fabric, in particular of a biodegradable non-woven fabric as described herein.
  • the method comprises the steps of:
  • the method further comprises at least one (such as one, any two or all three) of the following steps:
  • the fibrous web may be prepared for instance by a conventional wet- laid process using a wet-laid machine, such as an inclined wire or flat wire machine, or a dry-forming air-laid non-woven manufacturing process.
  • a wet-lay process is described for instance in US 2004/0129632 Al, the disclosure of which is incorporated herein by reference.
  • a suitable dry- forming air-laid non-woven manufacturing process is described for instance in US 3,905,864, the disclosure of which is incorporated herein by reference.
  • the fibrous web may be formed for instance by a wet-laid process or an air-laid process.
  • the fibrous web is formed by a wet-laid process. In another embodiment, the fibrous web is formed by an air-laid process. Also a
  • combination of a carding process or an airlay process combined with an airlaid process is suitable for forming a layer of biodegradable fibers combined with a layer of pulp fibers.
  • the pulp fibers can also be fed into the process as a tissue/paper layer getting combined with the fiber layer prior to entering the hydroentangling section where the tissue/pulp get disintegrated and blended with the biodegradable fibers.
  • the fiber blend used for forming the fibrous web comprises biodegradable fibers and pulp fibers and may optionally further comprise a biodegradable binder fiber and/or a biodegradable wet-strength agent.
  • step (b) at least a part of the biodegradable fibers are entangled with each other by subjecting the fibrous web to a water-jet treatment.
  • at least a part of the biodegradable fibers may be entangled with each other such that at least a part of the pulp fibers may be enclosed (with)in the entangled biodegradable fibers (the entangled fibrous web of biodegradable fibers).
  • water-jet treatment may in particular mean a process of mechanically entangling fibers by giving the fibrous web an impact with jets of water.
  • Water-jet treatment may also be referred to as
  • Water-jet treatment typically involves the ejection of fine, high pressure jets of water from a plurality of nozzles on a fibrous web provided on a conveyor belt or forming-wire.
  • the water jets penetrate the web, hit the belt where they may be reflected and pass again the web causing the fibers to entangle.
  • the fibers are entangled, in particular hydroentangled.
  • a biodegradable binder may be applied to the entangled fibrous web.
  • the biodegradable binder may be applied in the form of a solution or dispersion to the entangled fibrous web.
  • the biodegradable binder may be applied by spraying or other means of liquid application like a size-press, foulard or other. It may be favorable to remove excessive water prior to application of the binder especially in case of spray application by application of vacuum, pressure or other removing excessive water to avoid dilution of the binder.
  • a softening agent like glycerol is added to the biodegradable binder providing an enhanced flexibility/drapeability (reduced stiffness) of the finished non-woven especially in the dry state.
  • step (c) the drying of the entangled fibrous web may preferably be carried out such that the biodegradable binder fiber softens and/or partly melts, in particular is thermally activated, and/or that the biodegradable wet-strength agent and/or the biodegradable binder is cured, in particular undergoes a chemical reaction.
  • the drying is preferably carried out at a
  • thermodegradable binder fiber sufficiently high temperature to thermally activate the biodegradable binder fiber and/or to cause a chemical reaction of the biodegradable wet-strength agent and/or the biodegradable binder, for instance at a temperature of more than 80 °C, such as more than 100 °C, such as more than 120 °C, such as more than 140°C, such as more than 180°C, depending on the specific biodegradable binder fiber, biodegradable wet-strength agent and/or biodegradable binder used.
  • the present invention relates to a biodegradable non-woven fabric obtainable by a method for producing a biodegradable non-woven fabric as described herein.
  • a biodegradable non-woven fabric obtainable by a method for producing a biodegradable non-woven fabric as described herein may have any of the properties or features of a biodegradable non-woven fabric according to the first aspect, as described in the foregoing.
  • the present invention relates to a wipe or tissue comprising or consisting of the biodegradable non-woven fabric as described herein.
  • the non-woven fabric according to the present invention may be usable as a wipe or a tissue.
  • the wipe or tissue may be a dry wipe or dry tissue. Dry wipes may be particularly suitable for use as kitchen tissue/towel, shop floor towel and paper towel, enabling the soakage of liquids.
  • the wipe or tissue may be a wet wipe or wet tissue.
  • the wet wipe may be treated with a liquid or a lotion, as described in further detail above.
  • Wet wipes may be particularly suitable for personal care applications cleaning the skin of a human body, including the private parts thereof.
  • wet wipes may be particularly suitable for personal care use such as facial wipes or baby wipes.
  • the wipe is selected from the group consisting facial wipes, cosmetic wipes, baby wipes, sanitary wipes, kitchen towel, paper towel, handkerchiefs (facial tissue), cleaning tissue, cleansing tissue, floor mop and hard surface cleaning wipe.
  • the present invention relates to the use of a biodegradable binder, a biodegradable wet-strength agent and/or a biodegradable binder fiber for imparting resiliency to a wipe or tissue comprising a biodegradable non- woven fabric (or for increasing resiliency of a wipe or tissue comprising a biodegradable non-woven fabric).
  • biodegradable binder, the biodegradable wet-strength agent and/or the biodegradable binder fiber may be in particular those exemplified above.
  • the present inventors have found that by using a biodegradable binder, a biodegradable wet-strength agent and/or a
  • resiliency may in particular denote a property of a textile like structure, such as an elasticity or capability of at least partly reverting to an original shape after crumpling.
  • the resiliency may be characterized for instance by a Circular Bend Stiffness Force determined in accordance with modified ASTM D 4032-94 and/or a bending stiffness in machine direction (MD) and/or in cross direction (CD) determined in accordance with modified ISO 5628 (DIN 53 121) as described in further detail below.
  • a blend of 20 wt.-% of viscose fibers and 80 wt.-% of natural pulp fibers have been processed on an inclined wire machine with a basis weight of 60 g/m 2 and hydroentangled by application of water jets and dried as described in the patent EP 2 985 375 Bl .
  • the substrate is used as "base substrate” to demonstrate the effect of different binder applications. Due to the lack of binder the substrate can get “reactivated” by application of the aqueous binder system simulating an in-line process.
  • This layer of entangled fibers has been treated in 3 different ways: a) An aqueous solution of carboxymethyl cellulose (0.4 wt.%), citric acid (0.1 wt.%) and sodium dihydrogenphosphate (0.06 wt.%) is sprayed at room temperature (25°C) on the surface of the base substrate described above so that the solution is evenly distributed on the surface of base substrate and gets sucked into the material by capillary force. The sample is dried in a lab oven at 120°C without direct contact to a hot surface (air drying). The amount of aqueous solution of carboxymethyl cellulose and citric acid is chosen to achieve the following material composition after drying of the material to constant weight at 120°C
  • the measurement of the 2-point bending stiffness is used to characterize the resiliency of the material describing the capability of a material to resist to get crumpled up.
  • the 2-point bending stiffness has been measured according to a modified ISO 5628 (DIN 53 121) test.
  • Fig. 3 illustrates an exemplary set-up for the sample measurements. This can be done either by measuring the force needed to bend a test piece to a predetermined angle, or by measuring and determining the bending stiffness, which is an elastic property of the material.
  • test piece 38 mm x 50 mm
  • the clamp turns slowly to move the free end of the test piece in contact with the load cell.
  • the test piece is bent to the selected angle of 30°. The instrument records the force throughout the
  • the clamp then returns to the start position and the test piece can be released.
  • the bending stiffness Sb 3o-i has been computed using the corresponding formula: Bending force x Bending length L 2 x 60
  • Circular Bend Force The measurement of the Circular Bend Force is used to characterize the resiliency of the material describing the capability of a material to recover after getting crumpled up.
  • Circular Bend Stiffness Force has been measured according to a modified ASTM D 4032-94 test.
  • Fig. 4 illustrates an exemplary set-up for the Circular Bend Force measurements (not to scale).
  • Circular Bend Stiffness Force is measured as the force required to push a sample (38 mm x 38 mm) with a moisture content of 200 wt.% positioned on top of an orifice into the orifice with a piston at a defined penetration distance (see Fig. 3).
  • the piston is made of smoothly polished stainless steel with a length of 72 mm and a diameter of 6.3 mm having tip shaped as a round-nose with a radius of 3 mm and is used to push the sample into an orifice in a smoothly polished stainless-steel plate of the dimensions 102 mm x 102 mm x 6.4 mm with a diameter of 18.75 mm.
  • the lap edge of the orifice is at a 45° angel to a depth of 4.8 mm.
  • the force required to push the sample lying flat of the surface of the orifice with the piston positioned central on top of the orifice into the orifice is measured using a load cell positioned between the piston and a drive moving the piston into the orifice.
  • a Zwick Z.2.5/TN1S has been used to move the piston and to measure the force.
  • the Circular Bend Stiffness Force is defined as the max. force measured when pushing the sample with the piston at a speed of 500 mm/min into the orifice to a depth of 6.4 mm. The measurement is repeated 5 times and the mean value of these measurements is used.
  • Examples contain a water content of 200 wt.%
  • the data in table 1 show an increasing value of resilience of the web against mechanical deformation measured both by the bending stiffness and the circular bend stiffness force.
  • the positive effect of adding a wet-strength agent (sample c)) is also evident as reflected by the increased values at similar binder content. Comparing both the bending stiffness and the Circular Bend Stiffness Force (dry) of the reference material and sample a) reveal the significant increase of material stiffness of the dry material after application of the binder and the softening effect of addition of glycerol reducing the material stiffness which is of importance for the application as dry wipe. For applications as wet-wipe the added solution/lotion is functioning as a wetting agent, so that the addition of glycerol may not be required.
  • Figure 1 shows photographs of a reference sample subjected to a crumpling test wherein the photograph on the left-hand side illustrates a flat moistened sample prior to crumpling, the photograph in the middle illustrates the sample crumpled in a fist and the photograph on the right-hand side illustrates the sample after crumpling.
  • Figure 2 shows photographs of a sample of a biodegradable non-woven fabric according to an embodiment of the invention subjected to a crumpling test wherein the photograph on the left-hand side illustrates a flat moistened sample prior to crumpling, the photograph in the middle illustrates the sample crumpled in a fist and the photograph on the right-hand side illustrates the sample after crumpling.
  • the simple crumpling test demonstrates the substantially increased resiliency of the hydroentangled blend of biodegradable fibers and pulp fibers by adding a binder after hydroentanglement which bonds the pulp fibers together forming a layer with integrity within the structure of the entangled biodegradable fibers.

Landscapes

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

Abstract

La présente invention concerne un non tissé biodégradable, un procédé de production d'un non tissé biodégradable et une lingette ou un mouchoir. Le non tissé biodégradable comprend des fibres biodégradables et des fibres de pâte à papier. Au moins une partie des fibres biodégradables sont enchevêtrées les unes avec les autres. Au moins une partie des fibres de pâte à papier sont liées de manière covalente les unes aux autres par au moins un élément du groupe constitué d'un liant biodégradable, d'un agent de résistance à l'état humide biodégradable et d'une fibre liante biodégradable.
PCT/EP2019/078089 2018-10-17 2019-10-16 Non tissé biodégradable contenant de la pâte à papier et procédé de production d'un tel non tissé WO2020079083A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP19787262.5A EP3867435B1 (fr) 2018-10-17 2019-10-16 Tissu non-tissé biodégradable contenant de la pâte et son procédé de production
US17/286,374 US20210340700A1 (en) 2018-10-17 2019-10-16 Pulp-containing biodegradable non-woven fabric and method for producing the same
CN201980080916.3A CN113227480B (zh) 2018-10-17 2019-10-16 含纸浆的生物可降解非织造织物及其生产方法
ES19787262T ES2949666T3 (es) 2018-10-17 2019-10-16 Tela no tejida biodegradable que contiene pulpa y método para producir la misma
CA3116792A CA3116792A1 (fr) 2018-10-17 2019-10-16 Non tisse biodegradable contenant de la pate a papier et procede de production d'un tel non tisse
PL19787262.5T PL3867435T3 (pl) 2018-10-17 2019-10-16 Biodegradowalna włóknina zawierająca masę celulozową oraz sposób jej wytwarzania
RU2021113308A RU2769362C1 (ru) 2018-10-17 2019-10-16 Биоразлагаемый нетканый материал, содержащий древесную массу, и способ его изготовления

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18200989.4 2018-10-17
EP18200989 2018-10-17

Publications (1)

Publication Number Publication Date
WO2020079083A1 true WO2020079083A1 (fr) 2020-04-23

Family

ID=63878544

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/078089 WO2020079083A1 (fr) 2018-10-17 2019-10-16 Non tissé biodégradable contenant de la pâte à papier et procédé de production d'un tel non tissé

Country Status (8)

Country Link
US (1) US20210340700A1 (fr)
EP (1) EP3867435B1 (fr)
CN (1) CN113227480B (fr)
CA (1) CA3116792A1 (fr)
ES (1) ES2949666T3 (fr)
PL (1) PL3867435T3 (fr)
RU (1) RU2769362C1 (fr)
WO (1) WO2020079083A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3854923A1 (fr) * 2020-01-22 2021-07-28 Glatfelter Gernsbach GmbH Tissu non-tissé biodégradable et son procédé de production
EP3910102A1 (fr) * 2020-05-12 2021-11-17 Glatfelter Gernsbach GmbH Étoffe non tissée contenant un agent de désinfection et son procédé de production
CN113756015A (zh) * 2021-08-11 2021-12-07 杭州萧山凤凰纺织有限公司 一种高吸水环保无纺布
WO2021246940A1 (fr) * 2020-06-04 2021-12-09 Essity Hygiene And Health Aktiebolag Procédé de consolidation d'un matériau fibreux avec un polymère liant à base biologique, matériau fibreux consolidé et solution aqueuse de liant
WO2022069689A1 (fr) 2020-10-02 2022-04-07 Teknoweb Materials S.R.L. Bande composite hydroliée comprenant des fibres discontinues, des fibres absorbantes courtes et un liant
US11485849B2 (en) 2021-03-04 2022-11-01 Balena Ltd. Composite biodegradable polymeric based material, a product and a method of making same
EP3867435B1 (fr) 2018-10-17 2023-05-03 Glatfelter Gernsbach GmbH Tissu non-tissé biodégradable contenant de la pâte et son procédé de production

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114000374A (zh) * 2021-10-14 2022-02-01 余姚大发化纤有限公司 一种废旧纺织品回收制备的生物可降解无纺布片材、制备方法和用途
CN115089041A (zh) * 2022-04-13 2022-09-23 中国制浆造纸研究院有限公司 一种湿厕巾基材及其制备方法

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905864A (en) 1972-09-09 1975-09-16 Kroyer St Annes Ltd Karl Multi-ply fibrous sheets
JPH03241050A (ja) * 1990-02-16 1991-10-28 Agency Of Ind Science & Technol 分解性不織布シート及びその製造方法
EP0602881A1 (fr) * 1992-12-15 1994-06-22 The Dexter Corporation Essuie-tout humide
WO1996008601A1 (fr) * 1994-09-16 1996-03-21 Sca Hygiene-Paper Gmbh Agent de traitement de papier mousseline, procede de fabrication de papier mousseline au moyen de cet agent de traitement et son utilisation
EP0945536A2 (fr) * 1998-01-16 1999-09-29 Uni-Charm Corporation Méthode de fabrication d'un matériau non-tissé désintégrable dans l'eau et matériau non-tissé désintégrable dans l'eau
WO2000039389A1 (fr) * 1998-12-29 2000-07-06 Weyerhaeuser Company Fibres de cellulose carboxylees
US6436234B1 (en) * 1994-09-21 2002-08-20 Kimberly-Clark Worldwide, Inc. Wet-resilient webs and disposable articles made therewith
US20030106195A1 (en) * 2000-01-17 2003-06-12 Gerold Fleissner Method and device for production of composite non-women fibre fabrics by means of hydrodynamic needling
US20040129632A1 (en) 2002-07-11 2004-07-08 Yves Le Brech Heatsealable filter material
EP2108676A1 (fr) 2008-04-03 2009-10-14 Organoclick AB Polysacharides hétérogènes réticulés
WO2012059847A1 (fr) * 2010-11-05 2012-05-10 Arjowiggins Palalda Enveloppe de stérilisation biodégradable
WO2013015735A1 (fr) * 2011-07-26 2013-01-31 Sca Hygiene Products Ab Chiffon humide ou serviette hygiénique rinçable et procédé pour les fabriquer
CN103361880A (zh) * 2012-04-11 2013-10-23 上海杰事杰新材料(集团)股份有限公司 一种可完全降解的高抗冲击复合材料及其制备方法与应用
EP2692923A1 (fr) * 2012-07-31 2014-02-05 Suominen Corporation Tissus non-tissés contentant acide polylactique
WO2014117964A1 (fr) 2013-01-31 2014-08-07 Glatfelter Gernsbach Gmbh & Co. Kg Système de réticulation/de fonctionnalisation pour bande de papier ou bande non tissée
WO2015156713A1 (fr) * 2014-04-08 2015-10-15 Sca Hygiene Products Ab Chiffon ou tissu d'hygiène humide hydrolié jetable dans les toilettes
EP2985375A1 (fr) 2014-08-12 2016-02-17 Glatfelter Gernsbach GmbH Tissu non tissé dispersible et son procédé de production
WO2016200299A1 (fr) * 2015-06-10 2016-12-15 Sca Hygiene Products Ab Lingette ou papier hygiénique humide hydroenchevêtré(e) désintégrable et son procédé de production

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002171A (en) * 1975-03-17 1977-01-11 Personal Products Company Water-dispersible ionic polyurethane binder for nonwoven fabrics
US5308663A (en) 1989-06-20 1994-05-03 Kanai Juyo Kogyo Company Limited Biodegradable nonwoven fabric and its molding vessel
US5264269A (en) * 1989-09-21 1993-11-23 Kao Corporation Water-disintegratable cleaning article in laminated sheet form
US5500281A (en) * 1994-02-23 1996-03-19 International Paper Company Absorbent, flushable, bio-degradable, medically-safe nonwoven fabric with PVA binding fibers, and process for making the same
US5656367A (en) 1994-04-29 1997-08-12 National Starch And Chemical Investment Holding Corporation Poly(hydroxybutyrate/hydroxyvalerate) copolymers for fiber bonding
SE503606C2 (sv) 1994-10-24 1996-07-15 Moelnlycke Ab Nonwovenmaterial innehållande en blandning av massafibrer och långa hydrofila växtfibrer samt förfarande för framställning av nonwovenmaterialet
JPH093757A (ja) 1995-06-14 1997-01-07 New Oji Paper Co Ltd 吸水性不織布
US5916678A (en) * 1995-06-30 1999-06-29 Kimberly-Clark Worldwide, Inc. Water-degradable multicomponent fibers and nonwovens
EP0801172B1 (fr) * 1995-10-13 2003-01-02 Uni-Charm Corporation Voile biodegradable et hydrolysable
JP2001098489A (ja) 1999-09-30 2001-04-10 Uni Charm Corp 水不溶性カルボキシメチルセルロースを含有する水解性の繊維シート
US6670521B2 (en) * 2000-04-20 2003-12-30 The Procter & Gamble Company Dispersible absorbent products and methods of manufacture and use
US7732357B2 (en) * 2000-09-15 2010-06-08 Ahlstrom Nonwovens Llc Disposable nonwoven wiping fabric and method of production
AU2003239178A1 (en) 2002-04-25 2003-11-10 Weyerhaeuser Company Method for making tissue and towel products containing crosslinked cellulosic fibers
JP2007190531A (ja) 2006-01-23 2007-08-02 Kanai Juyo Kogyo Co Ltd エアフィルタ用濾材およびフィルタユニット
US8907155B2 (en) * 2010-11-19 2014-12-09 Kimberly-Clark Worldwide, Inc. Biodegradable and flushable multi-layered film
CN106906573B (zh) * 2012-01-04 2019-08-27 宝洁公司 具有不同密度的多个区域的含活性物质纤维结构
GB2513124B (en) 2013-04-15 2018-12-12 Welland Medical Ltd Flushable wipe
RU2696642C1 (ru) 2015-11-20 2019-08-05 Эссити Хайджин Энд Хелт Актиеболаг Впитывающий материал
CN105463703B (zh) * 2015-12-25 2018-02-16 常熟市飞龙无纺机械有限公司 可冲散可降解混合纤维水剌无纺布及其制备方法
DK179100B1 (en) 2016-07-06 2017-10-30 Ellepot As Use of an air permeable composite sheet material for propagation plugs for organic production
ES2866893T3 (es) 2016-08-24 2021-10-20 Organoclick Ab Composiciones de complejo de polielectrolito bioderivado con elevada hidrofobia que comprenden compuestos grasos
SE1651136A1 (en) 2016-08-24 2018-02-25 Organoclick Ab Bio-based pec compositions as binders for fiber based materials, textiles, woven and nonwoven materials
US20210054548A1 (en) 2018-01-31 2021-02-25 Georgia-Pacific Nonwovens LLC Modified Cellulose-Based Natural Binder for Nonwoven Fabrics
CN113227480B (zh) 2018-10-17 2023-04-11 格拉特菲尔特盖恩斯巴赫股份有限公司 含纸浆的生物可降解非织造织物及其生产方法

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905864A (en) 1972-09-09 1975-09-16 Kroyer St Annes Ltd Karl Multi-ply fibrous sheets
JPH03241050A (ja) * 1990-02-16 1991-10-28 Agency Of Ind Science & Technol 分解性不織布シート及びその製造方法
EP0602881A1 (fr) * 1992-12-15 1994-06-22 The Dexter Corporation Essuie-tout humide
WO1996008601A1 (fr) * 1994-09-16 1996-03-21 Sca Hygiene-Paper Gmbh Agent de traitement de papier mousseline, procede de fabrication de papier mousseline au moyen de cet agent de traitement et son utilisation
US6436234B1 (en) * 1994-09-21 2002-08-20 Kimberly-Clark Worldwide, Inc. Wet-resilient webs and disposable articles made therewith
EP0945536A2 (fr) * 1998-01-16 1999-09-29 Uni-Charm Corporation Méthode de fabrication d'un matériau non-tissé désintégrable dans l'eau et matériau non-tissé désintégrable dans l'eau
WO2000039389A1 (fr) * 1998-12-29 2000-07-06 Weyerhaeuser Company Fibres de cellulose carboxylees
US20030106195A1 (en) * 2000-01-17 2003-06-12 Gerold Fleissner Method and device for production of composite non-women fibre fabrics by means of hydrodynamic needling
US20040129632A1 (en) 2002-07-11 2004-07-08 Yves Le Brech Heatsealable filter material
EP2108676A1 (fr) 2008-04-03 2009-10-14 Organoclick AB Polysacharides hétérogènes réticulés
WO2012059847A1 (fr) * 2010-11-05 2012-05-10 Arjowiggins Palalda Enveloppe de stérilisation biodégradable
WO2013015735A1 (fr) * 2011-07-26 2013-01-31 Sca Hygiene Products Ab Chiffon humide ou serviette hygiénique rinçable et procédé pour les fabriquer
CN103361880A (zh) * 2012-04-11 2013-10-23 上海杰事杰新材料(集团)股份有限公司 一种可完全降解的高抗冲击复合材料及其制备方法与应用
EP2692923A1 (fr) * 2012-07-31 2014-02-05 Suominen Corporation Tissus non-tissés contentant acide polylactique
WO2014117964A1 (fr) 2013-01-31 2014-08-07 Glatfelter Gernsbach Gmbh & Co. Kg Système de réticulation/de fonctionnalisation pour bande de papier ou bande non tissée
WO2015156713A1 (fr) * 2014-04-08 2015-10-15 Sca Hygiene Products Ab Chiffon ou tissu d'hygiène humide hydrolié jetable dans les toilettes
EP2985375A1 (fr) 2014-08-12 2016-02-17 Glatfelter Gernsbach GmbH Tissu non tissé dispersible et son procédé de production
WO2016200299A1 (fr) * 2015-06-10 2016-12-15 Sca Hygiene Products Ab Lingette ou papier hygiénique humide hydroenchevêtré(e) désintégrable et son procédé de production

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Technical specialties, nonwoven products, long fiber papers, wet wipes, adhesive tapes from Glatfelter Composite Fibers", INTERNET CITATION, GLATFELTER, 16 October 2018 (2018-10-16), pages 1 - 1, XP055876692, Retrieved from the Internet <URL:https://web.archive.org/web/20181016134443/http://www.glatfelter.com/products/technical_specialties/default.aspx> [retrieved on 20220106]
DATABASE WPI Week 199149, Derwent World Patents Index; AN 1991-358583, XP002792120 *
DATABASE WPI Week 201402, Derwent World Patents Index; AN 2014-A26337, XP002788532 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3867435B1 (fr) 2018-10-17 2023-05-03 Glatfelter Gernsbach GmbH Tissu non-tissé biodégradable contenant de la pâte et son procédé de production
EP3854923A1 (fr) * 2020-01-22 2021-07-28 Glatfelter Gernsbach GmbH Tissu non-tissé biodégradable et son procédé de production
WO2021148498A1 (fr) * 2020-01-22 2021-07-29 Glatfelter Gernsbach Gmbh Tissu non tissé biodégradable contenant de la pâte à papier et procédé de production d'un tel tissu non tissé
EP3910102A1 (fr) * 2020-05-12 2021-11-17 Glatfelter Gernsbach GmbH Étoffe non tissée contenant un agent de désinfection et son procédé de production
WO2021228868A1 (fr) * 2020-05-12 2021-11-18 Glatfelter Gernsbach Gmbh Non-tissé contenant un agent désinfectant et son procédé de production
WO2021246940A1 (fr) * 2020-06-04 2021-12-09 Essity Hygiene And Health Aktiebolag Procédé de consolidation d'un matériau fibreux avec un polymère liant à base biologique, matériau fibreux consolidé et solution aqueuse de liant
WO2021246924A1 (fr) * 2020-06-04 2021-12-09 Essity Hygiene And Health Aktiebolag Procédé de consolidation d'un matériau fibreux avec un liant à base biologique, matériau fibreux consolidé et solution aqueuse de liant
WO2022069689A1 (fr) 2020-10-02 2022-04-07 Teknoweb Materials S.R.L. Bande composite hydroliée comprenant des fibres discontinues, des fibres absorbantes courtes et un liant
US11485849B2 (en) 2021-03-04 2022-11-01 Balena Ltd. Composite biodegradable polymeric based material, a product and a method of making same
CN113756015A (zh) * 2021-08-11 2021-12-07 杭州萧山凤凰纺织有限公司 一种高吸水环保无纺布

Also Published As

Publication number Publication date
RU2769362C1 (ru) 2022-03-30
EP3867435A1 (fr) 2021-08-25
EP3867435B1 (fr) 2023-05-03
CA3116792A1 (fr) 2020-04-23
CN113227480A (zh) 2021-08-06
US20210340700A1 (en) 2021-11-04
ES2949666T3 (es) 2023-10-02
CN113227480B (zh) 2023-04-11
PL3867435T3 (pl) 2023-08-28

Similar Documents

Publication Publication Date Title
EP3867435B1 (fr) Tissu non-tissé biodégradable contenant de la pâte et son procédé de production
CN106687633B (zh) 可分散的无纺织物及其制备方法
US10745836B2 (en) Multistrata nonwoven material
JP5599544B2 (ja) 少なくとも１つの吸収シートを含む美容用及び／または皮膚科用のパーソナルケア及び／またはクレンジング吸収製品
EP2627229B1 (fr) Lingette ou produit d&#39;hygiène en papier tissu humide pouvant être jetés dans les toilettes
RU2534534C2 (ru) Ламинированный нетканый материал с высоким содержанием целлюлозы
US20140189970A1 (en) Flushable moist wipe or hygiene tissue and a method for making it
EP2968033A1 (fr) Matériau non-tissé à strates multiples
EP2488684A1 (fr) Lingette ou tissu d&#39;hygiène humide jetable dans les toilettes
AU2014356113B2 (en) Multi-purpose tough stain removal articles
US20110020618A1 (en) Nowoven webs with visible compressed sites
EP2313545A1 (fr) Films non-tissés avec sites comprimés visibles
EP3402584B1 (fr) Substrat de nettoyage non-tissé
KR20210058851A (ko) 일체형 부직포 재료
US20230060026A1 (en) Biodegradable non-woven fabric and method for producing the same

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: 19787262

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
ENP Entry into the national phase

Ref document number: 3116792

Country of ref document: CA

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019787262

Country of ref document: EP

Effective date: 20210517