EP3580382B1 - Mehrlagiges dispergierbares vlies - Google Patents
Mehrlagiges dispergierbares vlies Download PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- nonwoven
- fabric material
- nonwoven fabric
- embossing
- fibers
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 239000000463 material Substances 0.000 title claims description 31
- 239000000835 fiber Substances 0.000 claims description 51
- 238000004049 embossing Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 13
- 238000009736 wetting Methods 0.000 claims description 10
- 229920001131 Pulp (paper) Polymers 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000004745 nonwoven fabric Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 229920002994 synthetic fiber Polymers 0.000 claims description 5
- 239000012209 synthetic fiber Substances 0.000 claims description 5
- 239000003921 oil Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 244000198134 Agave sisalana Species 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 244000146553 Ceiba pentandra Species 0.000 claims description 2
- 235000003301 Ceiba pentandra Nutrition 0.000 claims description 2
- 240000000491 Corchorus aestuans Species 0.000 claims description 2
- 235000011777 Corchorus aestuans Nutrition 0.000 claims description 2
- 235000010862 Corchorus capsularis Nutrition 0.000 claims description 2
- 241000219146 Gossypium Species 0.000 claims description 2
- 240000006240 Linum usitatissimum Species 0.000 claims description 2
- 235000004431 Linum usitatissimum Nutrition 0.000 claims description 2
- 229920000433 Lyocell Polymers 0.000 claims description 2
- 244000082204 Phyllostachys viridis Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 235000009120 camo Nutrition 0.000 claims description 2
- 235000005607 chanvre indien Nutrition 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- 229920000747 poly(lactic acid) Polymers 0.000 claims description 2
- 239000004626 polylactic acid Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 239000004627 regenerated cellulose Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000002023 wood Substances 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004148 curcumin Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003974 emollient agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000008177 pharmaceutical agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
Images
Classifications
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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
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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
- D04H1/40—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
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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
- D04H1/40—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.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nonwoven Fabrics (AREA)
Claims (7)
- Vliesstoffmaterial, das die Verwendung eines Bindemittels und einer ölbasierten synthetischen Faser vermeidet, wobei das Material mindestens zwei Vlieslagen umfasst, wobei von den beiden Lagen mindestens eine wasserstrahlverfestigt ist, wobei jede einzelne Vlieslage ein Grundgewicht von 20-100 gsm aufweist und jede einzelne Vlieslage eine Zusammensetzung von 50%-95% Holzpulpe und 5%-50% abgebrochene künstliche Fasern und/ oder Naturfaser aufweist, die eine Länge im Bereich von 5 mm bis 15 mm aufweisen; und wobei die mindestens zwei Vlieslagen durch thermisches Prägen, mechanisches Prägen oder einer Kombination derselben miteinander verbunden worden sind, wobei der Bindungsbereich beim Prägen im Bereich von 5% bis 33% liegt.
- Vliesstoffmaterial nach Anspruch 1, wobei die abgebrochenen künstlichen Fasern aus der Gruppe ausgewählt sind, die aus regenerierter Zellulose, Lyocell, Viskose, Polymilchsäure und Polyvinylalkohol besteht.
- Vliesstoffmaterial nach Anspruch 1, wobei die Naturfasern aus der Gruppe ausgewählt sind, die aus Baumwolle, Hanf, Flachs, Leinen, Bambus, Sisal, Jute und Kapok besteht.
- Vliesstoffmaterial nach Anspruch 1, wobei der Bindungsbereich beim Prägen größer als 5% ist.
- Vliesstoffmaterial nach Anspruch 1, weiter eine benetzende Flüssigkeit umfassend.
- Vliesstoffmaterial nach Anspruch 1, eine benetzende Flüssigkeit in einer Menge umfassend, die 2,5 Mal das Gewicht des Vliesstoffmaterials je Einheitsbereich nicht übersteigt.
- Vliesstoffmaterial nach Anspruch 1, wobei die Nassfestigkeit des Stoffmaterials größer als 250g/50mm ist.
Applications Claiming Priority (2)
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US201762456196P | 2017-02-08 | 2017-02-08 | |
PCT/FI2018/050090 WO2018146384A1 (en) | 2017-02-08 | 2018-02-08 | Multi-ply dispersible nonwoven material |
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EP3580382A1 EP3580382A1 (de) | 2019-12-18 |
EP3580382B1 true EP3580382B1 (de) | 2020-11-25 |
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EP18706289.8A Active EP3580382B1 (de) | 2017-02-08 | 2018-02-08 | Mehrlagiges dispergierbares vlies |
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US (1) | US20180223461A1 (de) |
EP (1) | EP3580382B1 (de) |
WO (1) | WO2018146384A1 (de) |
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EP3690136A1 (de) * | 2019-02-04 | 2020-08-05 | Wepa Hygieneprodukte GmbH | Nichtgewebtes faservliesstoffmaterial |
US20220228305A1 (en) * | 2019-04-24 | 2022-07-21 | Monosol, Llc | Nonwoven water dispersible article for unit dose packaging |
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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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69715618T2 (de) * | 1996-06-13 | 2003-05-08 | Kimberly Clark Co | Wasserdispergierbares feuchttuch |
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 |
AU2001290859C1 (en) | 2000-09-15 | 2006-10-26 | Ahlstrom Windsor Locks Llc | Disposable nonwoven wiping fabric and method of production |
EP1372950A2 (de) * | 2000-11-01 | 2004-01-02 | The Procter & Gamble Company | Mehrschichtige unterlage mit kontrollierter feuchtigkeitsabgabe für vorbefeuchtete wischtücher |
WO2002085272A1 (en) | 2001-04-20 | 2002-10-31 | The Procter & Gamble Company | Dispersible absorbent products having a multi-layered structure and methods of manufacture and use |
US7670971B2 (en) * | 2004-12-22 | 2010-03-02 | The Procter + Gamble Company | Pre-moistened nonwoven webs with visible compressed sites |
JP4540470B2 (ja) * | 2004-12-27 | 2010-09-08 | 花王株式会社 | 水解性清拭物品 |
US8389427B2 (en) * | 2006-11-29 | 2013-03-05 | Sca Hygiene Products Ab | Hydroentangled nonwoven material |
US7585797B2 (en) | 2007-04-30 | 2009-09-08 | Kimberly-Clark Worldwide, Inc. | Layered dispersible substrate |
MX2013004052A (es) * | 2010-10-13 | 2013-06-05 | Sca Hygiene Prod Ab | Toallita o papel higienico humedo o degradable. |
US9005738B2 (en) | 2010-12-08 | 2015-04-14 | Buckeye Technologies Inc. | Dispersible nonwoven wipe material |
US8257553B2 (en) | 2010-12-23 | 2012-09-04 | Kimberly-Clark Worldwide, Inc. | Dispersible wet wipes constructed with a plurality of layers having different densities and methods of manufacturing |
US9394637B2 (en) * | 2012-12-13 | 2016-07-19 | Jacob Holm & Sons Ag | Method for production of a hydroentangled airlaid web and products obtained therefrom |
US10113254B2 (en) * | 2013-10-31 | 2018-10-30 | Kimberly-Clark Worldwide, Inc. | Dispersible moist wipe |
-
2018
- 2018-02-08 EP EP18706289.8A patent/EP3580382B1/de active Active
- 2018-02-08 US US15/891,411 patent/US20180223461A1/en active Pending
- 2018-02-08 WO PCT/FI2018/050090 patent/WO2018146384A1/en unknown
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US20180223461A1 (en) | 2018-08-09 |
EP3580382A1 (de) | 2019-12-18 |
WO2018146384A1 (en) | 2018-08-16 |
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