CN104884703A - Substrates comprising frothed benefit agents for enhanced substrate benefits - Google Patents

Substrates comprising frothed benefit agents for enhanced substrate benefits Download PDF

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Publication number
CN104884703A
CN104884703A CN201380063287.6A CN201380063287A CN104884703A CN 104884703 A CN104884703 A CN 104884703A CN 201380063287 A CN201380063287 A CN 201380063287A CN 104884703 A CN104884703 A CN 104884703A
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CN
China
Prior art keywords
base material
additives
compositions
present
woven
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.)
Pending
Application number
CN201380063287.6A
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Chinese (zh)
Inventor
秦建
F·P·阿布托
D·J·凯尔沃特斯
K·M·德赛
Y·L·哈蒙兹
J·F·朱若那
C·D·克拉特科拉莫
A·R·洛伊德
S·E·肖弗
D·E·沃尔德鲁普
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Kimberly Clark Worldwide Inc
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Kimberly Clark Worldwide Inc
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Filing date
Publication date
Priority claimed from US13/718,709 external-priority patent/US20130157012A1/en
Application filed by Kimberly Clark Worldwide Inc filed Critical Kimberly Clark Worldwide Inc
Publication of CN104884703A publication Critical patent/CN104884703A/en
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D04H1/413—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 containing granules other than absorbent substances
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—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
    • D04H1/64—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 the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • 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
    • D04H13/00—Other non-woven fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/12—Processes in which the treating agent is incorporated in microcapsules

Abstract

The present invention provides a nonwoven substrate comprising a fibrous web defining a surface; and a layer of a benefit agent wherein said benefit agent is selected from an additive composition, an enhancement component and combinations thereof; wherein said benefit agent is frothed and bonded to the fibrous web surface through a creping process and wherein said nonwoven substrate demonstrates improvements selected from enhanced tactile feel, enhanced printing, a decrease in hysteresis, an increase in bulk, an increase in elasticity/extensibility, an increase in retractability, a reduction in rugosities and combinations thereof when compared to an untreated substrate.

Description

The base material of beneficial agent that comprise the base material benefit for strengthening, that foam
the cross reference of related application
The application is the part continuation of the U.S. Patent Application No. 13/330440 in submission on December 19th, 2011, and it is again the part continuation of the U.S. Patent Application No. 12/979852 in submission on December 28th, 2010.
Technical field
The present invention relates to the wrinkling non-woven substrate comprising foamable polymer and additional flexibilizing agent, this non-woven substrate, when comparing with untreated base material, represents the sense of touch of enhancing, the printing of enhancing, delayed minimizing, the increase of volume, the increase of elasticity/extendability, the increase of regracting, the reduction of fold and other useful products and uses benefit.
Background technology
Absorbent non-woven product such as paper towel, paper handkerchief, diaper, and other similar products are designed to have the volume of aspiration level, pliability and intensity.Such as, in some tissue products, strengthen pliability by the outer surface (one or more) of the compositions of additives such as softening agent to paper handkerchief fibre web that add local.Such compositions of additives can be bonding agent, and it is applied to base material, such as nonwoven fabric separately or in conjunction with wrinkling operation local.Wrinkling can be the part of nonwoven manufacturing techniques, and wherein paper handkerchief adheres to the hot surface of rotating drying cylinder cylinder by compositions of additives.Dry paper handkerchief and compositions of additives are wiped off from drying cylinder cylinder through doctor assemblies.The wrinkling volume adding tissue substrate sheet material, it increases the pliability by hand feel measurement conversely.Other performances are also affected, such as intensity, pliability, fold etc.Typically, compositions of additives can spray on the drying cylinder cylinder of yankee (Yankee) drying cylinder.But due to the waste of the compositions of additives that the boundary layer of air near dryer surface causes with relative high dryer temperature, spraying coating process has low chemical quality level of efficiency (40% to 70%).As required, applicator distance dryer surface about 4 inches (101.6mm) usually.Due to high drying cylinder rotating speed, the boundary layer of air near dryer surface, by pulled forward, produces the pressure barrier suppressing sprayed particle to arrive dryer surface.
In addition, by additive agent modified limited to a certain extent with the additional solid particle and staple fibre that comprise the overall bulk softness improving base material arbitrarily.The many additional particle that can strengthen the final feel of base material needs to be mixed to be sprayed onto in the dispersion of drying cylinder.Because these particles many are larger than spray nozzle, spray nozzle clogging is the problem stoping additive dispersions to be applied appropriately to dryer surface.Therefore, need such method, its softening particle that is compositions of additives is independent or combination enhancing is applied to dryer surface and final base material, to provide the base material of the pliability with improvement.
summary of the invention
The invention provides a kind of non-woven substrate, it comprises the fibrous web of defining surface; With beneficial agent layer, wherein said beneficial agent is selected from compositions of additives, strengthens component and its combination; Wherein said beneficial agent is foaming and is bonded to fibrous web surface by creping, and wherein said non-woven substrate is when comparing with untreated base material, represents and being selected from following improvement: the increase of the sense of touch of enhancing, the printing of enhancing, delayed minimizing, volume, the increase of elasticity/extendability, the increase of regracting, the reduction of fold and its combination.
brief description of drawings
For the purpose of illustrating the invention, drawings show exemplary form; But it should be understood that the present invention is not limited to the accurate layout and structure illustrated.
Fig. 1 is the schematic diagram of the method step of a kind of embodiment for generation of foaming according to the present invention.
Fig. 2 shows the SEM figure of the untreated spinning building of the ink with printing.
Fig. 3 shows the SEM figure of a kind of embodiment of the present invention, and wherein spinning building is used as according to process of the present invention and the base material being printed with ink.
Fig. 4 show according to the elastic strain of the embodiment of the hydroknit material of process of the present invention and the comparison data of untreated base material to the diagram of additional strain.
Fig. 5 show according to the elastic strain of the embodiment of the spinning building material of process of the present invention and the comparison data of untreated base material to the diagram of additional strain.
Fig. 6 is a series of SEM photos, shows the structure change of the towel material after by embodiment of the present invention process.
Fig. 7 shows according to operating direction (MD) elastic strain of the embodiment of the paper handkerchief base material of the process of the present invention comparison data to additional strain and untreated paper handkerchief base material.
Fig. 8 shows according to transverse direction (CD) elastic strain of the embodiment of the paper handkerchief base material of the process of the present invention comparison data to additional strain and untreated paper handkerchief base material.
Fig. 9 shows the SEM figure of untreated control film.
A () shows the SEM figure of the side of untreated control film.
B () shows the SEM figure of the offside of untreated control film.
C () shows the SEM figure of the cross-sectional view of untreated control film.
D () shows untreated control film and schemes with the SEM of the cross-sectional view of the 5X multiplication factor of Fig. 9 (c).
Figure 10 shows the SEM figure of the foam rete subsided of a kind of embodiment according to beneficial agent of the present invention, and wherein such embodiment comprises dispersion.
A () shows the SEM figure of the side of the foam rete subsided.
B () shows the SEM figure of the offside of the foam rete subsided.
C () shows the SEM figure of the cross-sectional view of the foam rete subsided.
D () shows the foam rete subsided and schemes close to the SEM of the cross-sectional view of 2X multiplication factor with Figure 10 (c).
E () shows the foam rete subsided and schemes close to the SEM of the cross-sectional view of 7X multiplication factor with Figure 10 (c).
F () shows the foam rete subsided and schemes with the SEM of the cross-sectional view of the 25X multiplication factor of Figure 10 (c).
detailed Description Of The Invention
Although to particularly point out and to know, description requires that claim of the present invention terminates, think and will understand the present invention better by following description.
Except as otherwise noted, all percentage, number and ratio are all based on the gross weight of composition of the present invention.Except as otherwise noted, because they are subordinated to listed component, all such weight is all based on its activity level, and therefore, such weight does not comprise may be included in solvent in commercially available material or accessory substance.Term " percentage by weight " may be expressed as " wt.% " in this article.Except occurring in the instantiation of actual measured value, the numerical value mentioned herein should be considered to be limited by word " about ".
As used herein, " comprising " refers to add other step and other composition of not affecting final result.This term comprise term " by ... composition " and " substantially by ... form ".The compositions and methods of the invention/process can comprise following content, be made up of and be substantially made up of following content following content: requisite item of the present invention as herein described and restriction, and arbitrary that add or optional member, component, step or restriction described herein.
As used herein, " compositions of additives " refers to the chemical addition agent (being sometimes referred to as chemicals, chemical composition, Chemical composition that and supplementary element (add-on)) being applied to base material partly.Apply to occur in dry run according to the local of method of the present invention, or in conversion process.Any base material (as paper handkerchief or nonwoven fabric) can be applied to according to compositions of additives of the present invention and polymeric dispersions, polymer solution or its mixture can be included, but are not limited to.
As used herein, " air-flow method fibre web " uses air forming method to make, the fubril bundle (bundle) wherein will with the general length of about 3 to about 52 millimeters (mm) is separated and carries secretly in air-source, then usually deposits on forming screens under the help vacuumized.Then, such as hot blast or spraying binder is used to be bonded to each other by the fiber of random deposition.Document defines the production of air-flow method film/nonwoven composites well and records in the prior art.Example includes but not limited to, as Laursen etc. people's and transfer the Dan Web method described in the U.S. Patent number 4,640,810 of Scan Web of North America Inc.; As the U.S. Patent number 4,494 people such as Kroyer, the Kroyer method described in 278; With transfer the U.S. Patent number 5,527 of Niro Separation a/s, the method described in 171 Soerensen's; And Appel etc. people's and transfer the method for the U.S. Patent number 4,375,448 of Kimberly-Clark Corporation, or other similar method.
" beneficial agent " provides composition as benefits such as pliability, smoothness, humidity, fragrance or component to the whole base material processed.Beneficial agent of the present invention includes but not limited to " compositions of additives " and " enhancing component ".
" bonded carded web " or " BCW " refers to the nonwoven web formed by carding process well known by persons skilled in the art, and at such as U.S. Patent number 4,488, further describe in 928, with the degree consistent with the present invention, its content is incorporated herein by reference.In carding process, the blend of staple fibre, viscose fibre and other possible adhesion component such as adhesive can be used.These components formed through combing or the large ball that otherwise processed, to produce basic uniform basic weight.These fibre webs are heated or are otherwise processed, and to activate any adhesive component, produce overall, senior non-woven material.
As used in this article, " being shaped altogether " is spray fusing polymeric material, and fiber or other component can add described spray fusing polymeric material to.In most of basic concepts, the spray fusing die head can settled near skewed slot by least one that is shaped altogether is carried out, and is added other material when fibre web is formed by this skewed slot to spray fusing material.These " other materials " can be natural fabric, particulate superabsorbent, natural polymer fibers (as artificial silk) and/or synthetic polymeric fibers (such as polypropylene or polyester).These fibers can be fibre fixed-lengths.Altogether moulding material can comprise by weight about 10% to by weight about 80% cellulosic material, such as by weight about 30% to by weight about 70%.Such as, in one embodiment, can produce containing by weight about 40% to by weight about 60% the common moulding material of paper pulp fiber.
As defined herein, " wrinkling ", at use blade, such as, occurs when the fibre web adhering to dryer surface wiped off by scraping blade.
" enhancing component " of the present invention is the beneficial agent as annexing ingredient, and described annexing ingredient can join compositions of additives, and with that give other senses of touch or additional benefit, this benefit can not be realized by compositions of additives individually.This enhancing component includes but not limited to particulate, expandable microballoon, fiber, additional polymeric dispersions, flavouring agent, antiseptic, humectant, medicine and placebo, etc.
As herein defined, " foam (froth) " is liquid foam.According to the present invention, when when dryer surface heating foamable composition of the present invention, said composition can not form solid foam structure.On the contrary, when this foamable composition is applied to through heating surperficial time, described foamable composition becomes continuous print film substantially, in this film, have air bubble.
" water thorn is wound around fibre web (hydroentangled web) " according to the present invention refers to the fibre web that the fluid column standing to cause web fibers to be wound around is sprayed.Water thorn is carried out to fibre web and is wound around the intensity generally increasing fibre web.In an aspect, paper pulp fiber can be wound in continuous print wire material, such as " spunbond fibre web (spunbond web) " by water thorn.The water thorn producing film/nonwoven composites be wound around fibre web may containing by weight about 50% to by weight about 80% paper pulp fiber, such as by weight about 70%.Water thorn as above is wound around composite web and can be purchased from Kimberly-Clark Corporation, trade name water thorn is wound around the U.S. Patent number 5,389 being described in such as Everhart, in 202.
" nonwoven fabric " is defined as the fabric that a class manufactures by being attached to together by fiber usually herein.Bondedfibre fabric by machinery, chemistry, heat, the mode of adhesive or solvent, or these any combination is made.Nonwoven manufactures from braiding, knitting or tufting is different.Bondedfibre fabric can be made up of the thermoplastic polymer synthesizing or such as cellulosic natural polymer.Cellulose paper handkerchief is an example of non-woven material.
As used herein, " melt-blown " is the formation process of nonwoven web, and this technique is extruded and used air tractive molten plastic resin hot, at a high speed, to form filament.Silk is cooled and collects on the screen cloth of movement as fibre web.This technique is similar to spunbond process, but blown fibers is thinner, generally weighs with micron.
As used herein, " processing aid " refer to formed treated base material of the present invention process in can helpful composition.Such as, blowing agent can serve as suitable processing aid of the present invention.In addition, creping aid can contribute to the adhesion that adds or release performance, for making base material wrinkling from drying cylinder cylinder.
As used herein, " fold " describe elastic laminate material due to be attached to non-elongate by stretching in advance simultaneously material substrate (such as nonwoven fabric) on elastomeric material (film or silk) and there is the character of channel-shaped wrinkle.Fold can be depending on the material substrate how laminated material adheres to or be bonded to non-elongate.When laminated material is lax or discharge, there is the trench similar with accordion apparatus wrinkle or channel-shaped wrinkle in base material.Like this act on wherein cuff and the usual bunchy of waistband so that it is common for providing in better adaptive personal care product to wearer.U.S. Patent number 6475600 according to people such as the Morman that on November 5th, 2002 publishes also describe in further detail fold.
As used herein, " spunbond " is nonwoven web technique, and in the process, silk is extruded, and stretches and to form fibre web on the screen cloth being placed into movement.Term " spunbond " and " filature fleece formation " often exchange, but usually adopt in the industry term " spunbond " or " spunbond " to represent specific fibre web formation process.This is to be distinguished by the spunlaid methods of this fibre web formation process and other two kinds of forms, other two kinds of forms described be spray fusing and flash-spinning.
As used herein, " spunbond/spray fusing composite (spunbond/meltblowncomposite) " is the laminar composite limited by multiply cloth, and institute's laminar composite is made up of the layer of the spunbond fibre web replaced (" S ") and spray fusing fibre web (" M ") usually: SMS, SMMS, SSMMS etc.
As used herein, " paper handkerchief (tissue) " typically refers to various paper products, such as face tissue, bathroom tissue, paper towel, napkin paper, sanitary napkin etc.Tissue products of the present invention can be made up of the cellulose fibre web with a layer or multiple layers usually.Such as, in one embodiment, cellulose or " paper " product can contain the paper fibre web of the individual layer formed by the blend of fiber.In another embodiment, paper product can contain the paper fibre web of multilayer (i.e. layering).In addition, described paper product can also be single or multiple lift product (such as, more than one deck paper fibre web), and one or more in its middle level can containing paper fibre web formed according to the present invention.
The present invention is current by the aqueous dispersion of wrinkling chemicals or solution spraying the substituting of method to dryer surface (such as, the cylinder of Yankee cylinder or the calender of heat).Compared with liquid chemical composition, because have significantly higher viscosity, so foaming chemical composition has the surface that enough structural intergrities carry out to arrive antigravity drying cylinder.By producing according to foaming chemical composition of the present invention, the surface that chemistry applicator more can close on drying cylinder is placed.In addition, by utilizing foaming chemical product of the present invention, it is feasible for introducing the additional benefit being otherwise more difficult to apply.
Another advantage of the present invention is the less energy of drying cylinder consumption.Chemistry applicator closes on the surface modification of drying cylinder chemical quality efficiency (that is, cutting the waste in applying process) and energy efficiency.Because the air introduced in foam of the present invention serves as diluent, therefore improve volume efficiency.Therefore, in dry run, need less heat to be removed from the wrinkling chemical composition (i.e. beneficial agent) of foaming by water.This is an improvement relative to the spraying coating process making dilute with water beneficial agent.
Further, after creping step, one deck beneficial agent is retained in the surface of non-woven substrate, to increase more volume and pliability.The increase of this volume is the air owing to catching in the layer of coating.The pliability strengthened is due to the beneficial agent also shifting or adhere to the surface of base material subsequently at Wrinkling that can foam on the surface of drying cylinder.Although the beneficial agent of foaming becomes film in drying steps, due to the higher viscosity relevant to solid level higher in the compositions of additives of foaming, and the air of catching in the foam of not all is all lost in drying steps.
" film " of beneficial agent more appropriately and is accurately described as " subside foam rete ".In order to understand this difference better, Fig. 9 shows the view of traditional film (such as casting films, extruded films or blown film).As shown in fig. 9 a, film relative smooth on side, only has several space, and, as shown in Fig. 9 b, completely level and smooth on another side.When observing the cross-sectional view of Fig. 9 c and 9d, the space that can be observed film is opposing parallel in the trunnion axis of film.By comparison, Figure 10 shows the foam rete that subsides of the present invention.The subside both sides (as shown in Figure 10 a and Figure 10 b) of foam rete show unique microcellular structure, and it makes when comparing with traditional film, possesses different machinery and the performance of sense of touch.Figure 10 c-Figure 10 f shows the cross-sectional view of the amplification of the embodiment of the foam rete that subsides of the present invention.As shown, the useful layer of foaming possesses the space of the air of catching due to foaming, which creates advantage provided by the present invention.In addition, easily can see microcellular structure in Z-direction in ground, the space in its middle level is more perpendicular to the trunnion axis of layer.Therefore, the present invention merely provides the traditional film of this word, but through foaming with wrinklingly provide the favourable foam rete that subsides, it provides and strengthens as described herein and improvement.
Can according to the various base materials of process of the present invention except paper handkerchief.Example includes but not limited to wet laid web, air-flow method fibre web, spunbond fibre web, spray fusing fibre web, altogether formed web, spunbond and carded web (BCW), continuous film, spun laced fabric, film/layer pressure material sheet, and water thorn is wound around fibre web.Beneficial agent is applied to the side of any base material usually, but can be applied to both sides as required.
Beneficial agent
1. compositions of additives
In the application expected, compositions of additives can with about 50mg/m 2to about 10,000mg/m 2, or about 50mg/m 2to about 1000mg/m 2, or about 100mg/m 2to about 1000mg/m 2level exist.Difference between the scope of these suggestions depends on whether compositions of additives is applied on the base material of online machine (as paper napkin machine) or off line machine (as nonwoven transforms processing line).Compositions of additives of the present invention can be the polymeric dispersions of following elaboration or the form of polymer solution.
A. polymeric dispersions
The foamable composition of insoluble polymer can be the form of dispersion.Solid-state insoluble polymer material, such as powder, particle etc., can by under certain process conditions, and such as at high temperature high pressure is extruded, it is mixed with water and one (or more) surfactant, is converted into foamable dispersion.Then, described polymeric dispersions can mix to be converted into foam with air and blowing agent.
Example according to dispersion of the present invention includes but not limited to, polyolefin dispersion, such as, be purchased from Dow Chemical, the HYPOD of Freeport, Texas, U.S.A. polyisoprene dispersion, such as, be purchased from Kraton Polymers U.S.LLC, Houston, Texas, U.S.A.'s or styrene-ethylene/butylene-styrene (SEBS) copolymer; Polybutadiene-styrene block copolymer dispersion, such as, be purchased from BASF Corporation, Florham Park, New Jersey, USA's latex dispersion, such as, be purchased from Wacker, Munich, Germany pVP-styrol copolymer dispersion and polyvinyl alcohol-ethylene copolymer dispersion, all can purchased from Aldrich, Milwaukee, Wisconsin, U.S.A..
B. polymer solution
The foamable composition of water-soluble polymer also can be the form of solution.Solid-state water soluble polymer material, such as powder, particle etc., can be dissolved into solution.Then, described polymer solution can mix to be converted into foam with air and blowing agent.
Comprise based on synthesis with based on natural water-soluble polymer according to the example of polymer solution of the present invention.The water-soluble polymer of synthesis includes but not limited to polyalcohol, polyamine, poly-imines, polyamide, polycarboxylic acids, poly oxide, polyglycols, polyethers, polyester, above listed copolymer or mixture.
Include but not limited to based on natural water-soluble polymer, the cellulose of the modification of such as cellulose ether and cellulose esters, the starch of modification, shitosan and salt thereof, carrageenan, agar, gellan gum, guar gum, the polysaccharide of other modifications and protein, and their combination.In a specific embodiment, water-soluble polymer also comprises: poly-(acrylic acid) and salt thereof, poly-(acrylate) and poly-(acrylic acid) copolymer.Other suitable water-soluble polymer comprises the polysaccharide that chain length is enough to be formed film, such as but not limited to, amylopectin and pectin.Such as, water-soluble polymer can containing other monoethylenically unsaturated monomer, and this monomer does not have the acid groups stretched out, but can with the monomer copolymerization with acid groups.Such compound comprises, the mono acrylic ester of such as polyethylene glycol or polypropylene glycol and monomethacrylates, and the molal weight (Mn) of such as poly alkylene glycol is up to about 2,000.
In another specific embodiment, water-soluble polymers can be that the commodity sold by Ashland, Inc. are called hydroxypropyl cellulose.Water-soluble polymer can be present in additive polymer with the amount of arbitrarily effectively (operative) and by the final change of properties according to the chemical constituent selected and expectation.Such as, with exemplary cases under, this Biodegradable water-soluble polymer can with based on about 1% to about 75% of compositions of additives gross weight, or at least about 1%, at least about 5%, or at least about 10%, or up to about 30%, up to about 50% or be present in compositions of additives up to about the amount of 75%, thus provide the benefit of improvement.Other example of suitable water-soluble polymer comprises the commodity sold by Ashland, Inc. and is called methylcellulose (MC); The commodity sold by Ashland, Inc. are called hydroxyethylcellulose; GLUCOSOL is called with the commodity sold by Chemstar (Minneapolis, Minnesota, U.S.A.) hydroxypropul starch.These chemical compositions arbitrary after dilution with water, be configured to heat, the dryer surface of atresia, transfer to the surface of fibre web with chemical composition the most at last.Water-soluble polymer in these chemical compositions includes but not limited to, polyvinyl alcohol, polyethylene glycol, poly(ethylene oxide), hydroxypropul starch, hydroxypropyl cellulose and combination thereof.
Traditional wrinkling chemical composition for paper handkerchief manufacture may comprise, and water-soluble polymer solution, such as, comprise the aqueous mixture of polyvinyl alcohol and polyamide-epihalohydrin.Although the wrinkling chemical composition of these routines comprises water-soluble polymer solution, these can not provide benefit of the present invention, and described benefit comprises increase pliability, and does not damage the intensity of paper.
Compositions of additives of the present invention can be commercially available, such as, from the HYPOD of Dow ChemicalCorporation dispersion, and be made up of water, polyethylen-octene copolymer and ethene and acrylic acid copolymer.Polyethylen-octene copolymer can purchased from Dow ChemicalCorporation, and commodity are called (2980I type), and ethene and acrylic acid copolymer can purchased from Dow Chemical Corporation, commodity are called (59081 type). serve as surfactant also stable with emulsification dispersion granule. acrylic comonomers be neutralized to by potassium hydroxide about 80% degree of neutralization.Therefore, by contrast, ratio more hydrophilic.In dispersions, serve as surfactant or dispersant.With difference, as suspended in dispersions, present the fine droplets that diameter is several microns. molecule surrounds drop, to form " micella (micelle) " structure of stable droplet.HYPOD comprise about 60% with 40%
When dispersion becomes the liquid of melting on the surface of the heat of drying cylinder, form continuous phase, and decentralized photo exists island is formed in " ocean ".This phase change is called inversion of phases.But, this inversion of phases depend on external condition, as molecular weight and the concentration of temperature, time, solid.Finally, when two kinds of polymer (or two-phase) have enough slack time to allow inversion of phases to complete time, just can there is inversion of phases.In the present invention, coated film retains dispersion forms, and this shows to there is incomplete inversion of phases.The benefit retaining dispersion forms includes but not limited to, due to the more hydrophilic coating that the exposure of phase produces, and due to the pliability more improved of the coating product that the bubble that coat inside is caught causes provides extra volume.
The dispersion of dilution may have low-down viscosity (about 1cp, just as water).When on the drying cylinder cylinder being applied to heat, low viscous dispersion is by experience water evaporation process and complete inversion of phases.The continuous print fused film produced to have embedding wherein then dispersion island.The film formed after water evaporates completely is the solid of wherein not catching any bubble.As fig. 6 c, and as discussed below, fused film transferred to after on fibre web by Wrinkling, the film covering treated paper handkerchief surface is discontinuous but interconnective.
Method of the present invention can use high solid, full-bodied dispersion (about 10% to about 30%), and can containing a large amount of bubbles (at least large than volume of dispersion 10 times of the volume of air).Desirably, be purchased (about 42% solid, comprises dispersion simultaneously with ) there is the viscosity of about 500cps, the viscosity of 1cps and glassware for drinking water is had an appointment.Containing having an appointment 20% dispersion can have the viscosity of about 200cps, this is relatively high viscosity, but has and be less than about 1% dispersion can have the viscosity of the viscosity (1cp) close to water.After catching a high proportion of air, compared with the dispersion before foaming, the HYPOD of foaming the viscosity index (VI) ground of dispersion increases.
With reference to Fig. 1, when the dispersion foamed is applied on the dryer surface 23 of atresia, limited amount water will from this rapid evaporation.Recognize in order that the slow evaporation of to combine the dispersion caused due to high solid with the high viscosity of dispersion can stop dispersion completes inversion of phases (wherein become continuous print and become dispersion) and stop the air escape of catching.Dryer surface in heat is produced the fused film of unique microstructure by this.
Aforementioned hypothesis is confirmed with reference to Fig. 6, SEM photo.When compared with paper handkerchief treated with surface of the present invention for paper handkerchief treated for the surface of prior art, two direct benefits can be observed.First, the paper handkerchief produced of method of the present invention is more fluffy and have more soft feel (as shown in Figure 6) because catching bubble 21.The second, paper handkerchief of the present invention causes the surface of hydrophilic component to expose due to incomplete inversion of phases, therefore has more wettable surface.
Intuitively Fig. 6 a, 6b, 6c and Fig. 6 a', 6b', 6c' are compared.Measured by hand rating test disclosed herein (the In Hand Ranking Test), having dispersion pearl 19 and catching the coating of bubble 21 shown in Fig. 6 b is more soft than the fused film shown in Fig. 6 b'.
II. component is strengthened
The present invention provide not only the base material of the pliability due to beneficial agent and methods described herein with improvement, additionally provides the feel of improvement.Enhancing component is added dispersion of the present invention to provide cotton-shaped/fluffy feel to base material, instead of the sensation that the silk can felt when being usually used alone dispersion is sliding/smooth.Should be understood that the feel of the enhancing produced by the present invention also can comprise such as describe the softness of soft touch performance, goat skin sample, hair shape, the descriptor such as level and smooth, fine hair shape performance.Although for some base materials, what expect may be the sensation that silk is sliding/smooth, the invention provides other selection, so that provide multiple quality and aesthetic feeling.Enhancing component of the present invention includes but not limited to: particle, as silica gel particle; The microballoon of heat-swellable, as fiber, as short velveteen fibre; Polymeric dispersions, as poly-(vinyl pyrrolidone-styrene), and combination.When using the fiber of short velveteen fibre or other type, fibre length can be about 0.1mm to about 5mm.
Strengthen component except providing the feel of formation sharp contrast, strengthening component can also provide additional benefit, and this benefit does not provide by being used alone dispersion.Enhancing component of the present invention can also comprise flavouring agent, antiseptic, humectant, placebo, colouring agent, hydroxy ethyl cellulose, medicine, and combination.Such component will provide overall base material, described base material have combine with benefit, from the sensation of the improvement of dispersion, when there is no this technology, otherwise can not provide this benefit.The present invention can utilize the arbitrary enhancing component be comprised in compositions of additives of the present invention or the combination strengthening component.Such as, the amount joining the enhancing component of dispersion of the present invention can be by dispersion composite weighing scale about 0.5% to about 30%, about 1% to about 20% or about 2% to about 10%.
Strengthen component or to join afterwards in the chemical composition of foaming before chemical composition foaming.In an application expected, strengthening the level of component is, based on the gross dry weight about 0.5% of compositions of additives to about 30%, or about 1% to about 20%, or about 2% to about 10%.
When strengthening component and compositions of additives of the present invention combinationally uses, they allow to strengthen pliability when not damaging intensity.Such as, when face tissue is used as base material of the present invention, and not with compared with the base material of the mode process identical with the present invention, there is the global advantage logarithm increase of about 0.5 to about 18 and the GMT level of about 800 to about 1200.As used herein, " GMT " refers to when measuring TENSILE STRENGTH, the combination of machine direction and transverse machine.The microballoon expanded remains on film to be strengthened with the feel contributed to when consumer contacts them under conditions of use with the surface of paper handkerchief.
III. processing aid
Processing aid of the present invention is included in can helpful chemicals in the process forming treated base material of the present invention.Processing aid slightly may occur or may disappear in final treated base material.Although comprise them only in order to helpful in the process manufacturing treated base material, they also give small benefit to the base material desired by the present invention.For the object of this application, " processing aid " be those foaming process or beneficial agent is applied to base material process in use those, and not use " processing aid " in the process manufacturing substrate precursor.
A. blowing agent
The blowing agent of most commercial is applicable to producing foam of the present invention.Suitable blowing agent includes but not limited to, the low molecular weight material of liquid form or polymeric material.Blowing agent can be anionic, cationic or nonionic.These blowing agents can be divided into four classes according to function:
1. the ability of air capturing agent-catch for strengthening liquid (dispersion, solution or its mixture etc.) air, this ability can be measured by measuring " blow-up ratio (blow ratio) ".The exemplary lists of blowing agent includes but not limited to potassium laurate, NaLS, Texapon Special, ammonium stearate, potassium oleate, sulfosuccinic acid list acyl octadecyl disodium, hydroxypropyl cellulose etc.
2. stabilizing agent-for the bubble of enhanced foaming is to the stability of time and temperature, and example includes but not limited to NaLS, ammonium stearate, hydroxypropyl cellulose etc.
3. wetting agent-for strengthening the wettability of the desiccated surface of membrane coat.Example includes but not limited to, NaLS, potassium laurate, sulfosuccinic acid list acyl octadecyl disodium etc.
4. the form of gelling agent-by making compositions of additives become the gel for reinforcing chamber wall, the bubble be used in stable foam.Example includes but not limited to the cellulose ether of hydroxypropyl cellulose, hydroxyethylcellulose, carboxymethyl cellulose and other modifications.
Some blowing agents can provide more than a kind of above listed function.Therefore, there is no need to use all four kinds of blowing agents in foamable compositions of additives.The chemical composition of compositions of additives is depended in the selection of blowing agent.Such as, when compositions of additives comprises such as HYPOD anionic group timesharing, suitable blowing agent must be selected from anionic group or nonionic group.If use CATION blowing agent to strengthen the foaming capacity of anionic additive composition, cationic components in blowing agent forms ionic bond by with the anionic group in compositions of additives, and causes CATION blowing agent and anionic additive composition to become water-insoluble due to the formation of this ionic bond.On the contrary, if comprise cationic components in compositions of additives, be not suitable for using anion foaming agent.
B. creping aid
Creping aid is the chemical composition of adding beneficial agent of the present invention to, to optimize paper handkerchief base material to the adhesion property of dryer surface and release performance.These fall into following group widely:
1. adhesion aid-for increasing the adhesion of paper to dryer surface.Example includes but not limited to, polyvinyl alcohol, polyacrylate, hydroxypropul starch, carboxymethyl cellulose, kymene (kymene), polyvinylamine, its copolymer or mixture.
2. discharge auxiliary agent-for reducing (enhancing) paper to (from) adhesion (release) of dryer surface.Example includes but not limited to, polyethylene glycol, polypropylene glycol, poly(ethylene oxide), poly(propylene oxide), polyolefin, fluorinated polyolefin, containing above-mentioned copolymer and blend.
3. auxiliary curing agent-for accelerating or the solidification of the wrinkling bag that slows down, such as plasticizer or flexibilizer.
4.LutensolA 65N Iconol 24 hereafter " " (from chemicalCompany) be also used in the present invention help wrinkling.
Foam generating method
Generally speaking, prepare foaming chemical product and utilize system liquid and air being pumped into blender.This blender by air and liquid blended, to produce inherently containing the foam of multiple minute bubbles.Foam leaves blender and flows into applicator.
The parameter limiting foaming chemical composition quality is blow-up ratio, the volume that blow-up ratio is defined as the minute bubbles that dispersion chemistry product are caught and the ratio of volume mix front dispersion.Such as, when blow-up ratio is 10:1, the air of 10 liters/min can to capture in this liquid and to produce total foam flow velocity of 11 Liter Per Minutes by the dispersion flow velocity of 1 liter/min.
In order to reach high blow-up ratio, the mechanical mixture ability of additive agent mixture and foaming capacity are all decisive factors.If the air capacity that chemicals can retain or catch only can reach 5 blow-up ratios, no matter how powerful this foam cell is, and it can not produce the stable foam with 10 blow-up ratios.Once remove mechanical force, will discharge from foamed system more than any unnecessary air of 5 blow-up ratios.In other words, any air of catching higher than the Air containment ability of dispersion will become unstable.The bubble of most of such instability, after mechanical agitation stops, overflowing (degas bubble) immediately from foam.
With reference to Fig. 1, schematically show the system 10 that can produce according to the chemical composition of foaming of the present invention.First, can foaming chemical product (as deng) be placed in chemical tank 12.Chemical tank 12 is connected to pump 14.It is desirable for the pipe 13 changed between chemical tank 12 and pump 14, can will can be transported to the pump of two different sizes by foaming chemical product to make it.It is desirable for that chemical tank 12 is positioned at the level higher than pump 14, to keep pump pending.
An optional little secondary pumps (not shown) may be used for the slow running foam process lower than pump 14.The flow velocity that larger main pump 14 can produce reaches 25 liters/min of flow rate of liquid, and it is for the amount of high applying speed and/or high compositions of additives.Less secondary pumps (not shown) flow rate of liquid can reach about 500cc/min, for the compositions of additives of low applying speed and/or low amounts.
Flowmeter 16 is between pump 14 and foam mixer 18.By the compositions of additives expected, chemical solids, linear velocity and applicator width calculation flow rate of liquid.The scope of flow velocity can be that about 5:1 is to about 50:1.When using less secondary pumps, its flow rates is about 10cc/min to about 500cc/min.When using large pump 14, its flow rates is about 0.5 liter/min to about 25 liters/min.When using less secondary pumps, select the mass air flow sensor of 20 liters/min.When running larger main pump 14, use the mass air flow sensor of 200 liters/min.
In an aspect, using foam mixer 18 to be blended into by air can to produce minute bubbles in the liquid mixture of foaming chemical product in the foam.Specific flow rate of liquid discussed above and blow-up ratio is used to make air by being metered into system 10.It is desirable that the foam mixer 18 with 25.4cm (10 inches) size may be used for producing foam.Possible foam mixer 18 is from a Gaston Systems, Inc.of Stanley, the CFS-10 inch foam generator of North Carolina, U.S.A..
It is desirable that the rotary speed of foam mixer 18 is limited to about 600rpm.In this technique, the rpm speed of blender depends on the foaming capacity (that is, catching air to form the ability of stabilise bubbles) of compositions of additives.If compositions of additives easily foams, usually need lower rpm.If compositions of additives is not easy foaming, usually need higher rpm.Higher mixing velocity contributes to accelerating foam balance or best blow-up ratio.Normal rpm for blender is the about 20%-60% of maximum rpm speed.The type of the blowing agent except compositions of additives and/or amount also can affect the rate request of blender.
Check the bubble uniformity of this foam, stability and flow pattern.If the uniformity of bubble, stability and flow pattern are not the standards expected, before the applicator 24 that led by foam, the chemical composition of flow velocity, mixing velocity, blow-up ratio and/or solution/dispersion can be adjusted.
In one aspect of the invention, HYPOD or other will by foam and for wrinkling chemical composition by blended and join chemical tank 12.HYPOD dilute solution (< 10% total solid) and the chemical composition of other difficult foaming usually need some things to join in formula, to increase viscosity and foaming capacity.Such as, hydroxypropyl cellulose or other blowing agent or surfactant, may be used for producing stable foam, for be applied to equably the swing roller of dryer surface through heating with the surface of impermeability.Strengthen component, such as silica gel particle or short velveteen fibre can add in compositions of additives in every way, and described mode includes but not limited to: joined in compositions of additives before compositions of additives pumps into foaming machine; Compositions of additives from foaming machine out after but be incorporated into compositions of additives before the compositions of additives of foaming is applied to dryer surface; Or before substrate contact compositions of additives, be applied to drying cylinder.When enhancing component is incorporated into compositions of additives, is necessary that and ceaselessly stirred the mixture before being joined foaming machine, strengthen component deposition in the bottom of container to prevent solid.When enhancing component is incorporated into the compositions of additives of foaming, need suitable device to guarantee the compositions of additives Homogeneous phase mixing strengthening component and foaming.
Base material
Suitable substrate material includes but not limited to face tissue; Not wrinkling ventilation dried towel (UCTAD); Paper towel; From Kimberly Clark Corporation, Neenah, Wisconsin, USA.'s non-woven material, wet laid web, air-flow method fibre web, spunbond fibre web, spray fusing fibre web, altogether formed web, spunbond and carded web (BCW), continuous film, spun laced fabric, film/layer pressure material sheet, water thorn winding fibre web and all types of paper, paper handkerchief and other adhesive-bonded fabrics.
In non-limiting example discussed in this article, foaming chemical composition can be applied to nonwoven fabric such as paper handkerchief.As used herein, nonwoven fabric refers to comprise face tissue, bathroom tissue, paper towel, spunbond, diaper or feminine care body side liner and outer cover, napkin paper (such as hand and face) etc.Paper handkerchief can be prepared in a different manner, include but not limited to conventional press felt paper handkerchief; The dense pattern paper handkerchief of high loft (high bulk); With the non-compacting paper handkerchief of high loft.The tissue products made thus can be the individual layer of such as U.S. Patent Publication No. 2008/0135195 or the structure of multilayer.Another embodiment forming paper handkerchief of the present invention uses the paper technology being called not wrinkling ventilation drying (" UCTAD ").The example of such technology is disclosed in the U.S. Patent number 5,048,589 of the people such as Cook; The U.S. Patent number 5,399,412 of the people such as Sudall; The U.S. Patent number 5,510,001 of the people such as Hermans; The U.S. Patent number 5,591,309 of the people such as Rugowski; With in the U.S. Patent number 6,017,417 of the people such as Wendt.
Surface coating method
With the dispersion of will dilute or solution spraying to dryer surface, method as the surface 23 (or other suitable drying cylinder cylinder surface (not shown)) of Yankee cylinder is different, and high solid foaming chemical composition can be applied on dryer surface 23 by method of the present invention.In the present invention, use Dilution air to comprise the beneficial agent of any level solid, its medium viscosity is in the scope can inhaled by foaming pump.Such as, there is the solid reaching about 65%, reach the solid of about 50%, reach about 35%, or reach the solid of about 20%.
The benefit of the product that the coating process of high solid of the present invention can show or method includes but not limited to unique micro structure due to the foam rete that subsides and more soft surface; Due to foaming chemical composition near and directly to apply and less chemicals is wasted; (e.g., when it is exposed to a large amount of hard water, chemicals is as HYPOD with not needing to use soft water or deionized water due to high chemical composition and water ratio become unstable, namely solid level is 1% or lower); With the chemical composition and the base sheet that need less drying can carry out dry foaming.Include but not limited to owing to adding the additional benefit strengthening component, the uniformity of the whole beneficial agent membrane coat on non-woven substrate; The adhesiveness of the enhancing of whole beneficial agent coating and non-woven substrate; The mechanical strength of the enhancing of whole beneficial agent coated film; With the stability of the enhancing of the beneficial agent foam from foam maker to dryer surface.
The beneficial agent of foaming can be applied on base material by two kinds of modes: online applying or off line apply.In Wiring technology, foam maker and applicator will be added into paper handkerchief and produce, and the chemicals foamed in the fabrication process will be applied on any base material.Off line applies foaming chemical composition to be applied to those base materials produced by non-creping.Such as, dry (" the UCTAD ") bath paper towel of non-wrinkling ventilation and melt-spun non-woven material are suitable for off-line applying method.
With reference to Fig. 1, in one aspect of the invention, the chemicals of foaming is applied to dryer surface 23 by applicator 24.The contiguous dryer surface (0.64cm or 1/4 inch) of foaming applicator 24 is placed, for being uniformly distributed foam on dryer surface 23.Such placement allows the chemical composition of foaming better directly to contact, especially during high-speed cruising with dryer surface 23.
It is most desirable that use single parabola applicator 24 chemical composition to be applied to the drying cylinder cylinder surface 23 of rotation.But, due to the changeability of drying cylinder or base sheet, if need to change the width that chemicals applies horizontally through dryer surface, the applicator (not shown) with multiple small-sized parabola applicator regions can be used.
Normally, strengthening component makes compositions of additives coating (that is, ocean layer) show the novel feel with improving.Such as, HYPOD can be used as compositions of additives and when do not use strengthen component foamed/surface is coated on base material.When touching it surperficial, compared with using the identical paper handkerchief of conventional wrinkling chemical composition, it provides significant pliability to improve.But, also feel a little as wax-like or smooth simultaneously.The consumer of some type may like this smooth feeling, but other may not want that there is this sensation.Add enhancing component can not damage the improvement of pliability and change this sensation.By the feel that such method obtains, include but not limited to cotton, velvet, fine hair and/or hair.Adding another benefit strengthening component (one or more) is compositions of additives HYPOD coating has the intensity of improvement, and when this beneficial agent is applied to previously prepared base material, during as thermoplastic nonwoven fabric, this intensity is important.The intensity of such improvement makes the coated film of beneficial agent evenly and fully covers on base material.
In addition, can show and strengthen component and applying method and may be used for strengthening surface feel as pliability, or improve surface property, as absorbability, frictional force, volume etc.In addition, other surperficial beneficial agent, such as aromatic, antiseptic, humectant, placebo etc., can than compositions of additives HYPOD the applying better that can provide separately.Think and comprise HYPOD with polyvinylpyrrolidone-cinnamic base material than the HYPOD used without any strengthening component almost 1.5 lods (significantly) are more soft.
Applicant finds, has the silica gel particle of 6% as the HYPOD strengthening component the IHR result of the base material of foaming is have the most soft perceptual result, 5 lod differences larger than the non-foamed base material with conventional wrinkling chemical composition.Next, without any the HYPOD strengthening component foaming contrast is more than 4 lod differences.Think that every other foamed substrate compares base material softness at least 3 lod of the non-foamed of contrast.
Adding another benefit strengthening component is compared with non-foamed surface-treated base material, and while usually maintaining or having larger tensile strength, can reach more significant thickness increases.In surface conversion process, these base materials roll under identical nip pressure.The percentage listed near data point is before foaming, based on HYPOD in formula the amount of enhancing component that adds of dry weight.Show, compared with non-foamed, wrinkling base material, foaming, wrinkling base material illustrates the increase that volume is extra, and the highest level of increase is close to 35%.Great majority have the base material of enhancing component than only comprising HYPOD foaming base material volume increase.All process conditions, the type of such as blade, oblique angle and pressure load are identical.
Process for creping
Wrinkling is the part of substrate fabrication process, and wherein base material is wiped off from rotating drying cylinder (such as Yankee dryer) surface through blade assembly.Describe in the wrinkling U.S. Patent Application No. 13/330440 can submitted on December 19th, 2011 as people such as Qin and carry out.
Other contributing factors
Beneficial agent of the present invention can be used for providing the various advantage that can be used for coated substrate and provides above-mentioned advantage.In addition, there are other advantages provided by the invention, it can be pointed out significantly according to following and describe.
The printing strengthened
As described herein, a unique advantage provided by the invention is its printing capability on non-woven substrate making to strengthen.Can apply compositions of additives to make substantially to be formed more as the surface of film on base material, thus printing more unanimously and more smooth in some cases.Such as, paid attention to because of the performance of the cloth specimen sense of touch of spunbonded materials or sensation, but when printed, it not favourable base material relative to film laminate, because ink is tending towards diffusion or absorbs entering material, and reduce the ink be presented on base material and cover.Certainly, film laminate is best for printed pattern, but it is not best as the base material close to skin.Before making the present invention, the scheme of non-woven substrate printing was once print film be laminated on base material with adhesion.Although this always good, it may increase manufacturing technique and cost.So, the invention provides unique compromise, wherein do not remove performance or the sensation of the cloth specimen sense of touch of base material, but it also provides the surface making the print capacity strengthened relative to base material.The invention provides the surface of relative smooth, which obviate pixelation (pixilated) outward appearance of outer cladding material at present.In addition, ink adheres is improved.Base material of the present invention, when comparing with untreated base material, has at least about 25%, at least about 50% or cover at least about the ink of the enhancing of 75%.The invention provides the surface area of improvement, thus more base material can be printed ink covering, thus compared with untreated base material, improve outward appearance or the definition of printing on substrates.The surface printing of current outer cover pressure material needs to use ink special, with the problem avoiding potential ink to wipe.The present invention can adopt any commercial inks for being printed on base material.In addition, the arbitrary routine techniques for printing can be used in the present invention.Such technology can include but not limited to intaglio plate coating, offset printing, serigraphy, flexographic printing, ink jet printing, laser printing, digital printed etc.Dispersion of the present invention provides polar portion, and its expection improves ink adheres and therefore improves the printing directly on non-woven substrate.
Fig. 2 shows the untreated spinning building using ink printing.(white dot is the ink be printed on the fiber of spinning building).By contrast, Fig. 3 shows with beneficial agent process of the present invention and with the spunbond base material of ink printing.The sample (Fig. 3) of visible process has film sample coating from the teeth outwards, and it provides larger area for ink covering surfaces, to produce from print distinctness and lightness angle the visual aesthetic strengthened.With 50% of the spinning building of Fig. 3 process of the present invention ink cover compared with, in the untreated spinning building of Fig. 2, covered about only the surface of 20% by ink.Use image analysis software to quantize SEM figure and obtain these data.Ink can evenly and the base material sticking to process smoothly improves the overall appearance of printing thus.
The volume strengthened and stretching
Except improving the overall feel of non-woven substrate, when comparing with untreated base material, the present invention also can increase volume and basic weight.Be not bound by theory, volume can be proportional with the basic weight of the fiber in base material of the present invention.Along with basic weight increases, the wrinkling of fiber makes the thickness of fiber expand in z-direction and therefore makes the volume expansion of fiber.Fiber is by soft (loft) thus increase the volume of fiber.In the present invention, beneficial agent of the present invention can be independent or in conjunction with some wrinkling mechanism, and contributing to described volume increases and basic weight increase.Such as but not limited to, when comparing with the basic weight untreated spunbond base material that be 12gsm is 13cc/g with volume, the present invention can make spinning building represent the basic weight of 16gsm and the volume (or increasing by 33% and 108% respectively) of 27cc/g.Similarly, wrinkling mechanism and technique can represent even larger advantage and make spinning building represent basic weight and the 25cc/g (or increasing by 108% and 92% respectively) of 25gsm.Such as, compared with untreated base material, the basic weight be greater than at least about 20% to about 250% increases to the invention enables the non-woven material with different content of cellulose to have.Such as, untreated cellulosic substrates has shown and has had the basic weight of about 56gsm and 84% delayed.But non-woven fibre element base material of the present invention, can represent the basic weight (basic weight increase about 70%) of about 95gsm and about 74% delayed.Except beneficial agent, than the HYPOD of foaming as used in the present invention dispersion, second component is non-ionic surface active agent such as, as the volume successfully increasing base material of the present invention can be helped further. be made up of seven moles of ethylene oxide addition products of linear dodecyl myristyl alcohol, it is also can be easily biodegradable.In addition, at use non-ionic surface active agent such as when, the invention enables the beneficial agent of foaming, such as HYPOD a prose style free from parallelism is with low Pitch-based sphere but still the whole surface being dispersed in base material uses.But, the invention enables increase volume, and need not add or add the non-ionic surface active agent up to about 50%, such as in some embodiments of the present invention, such as, about 500mg/m 2the beneficial agent of foaming, such as, HYPOD dispersion, can in conjunction with about 250mg/m 2non-ionic surface active agent, such as (namely the ratio of non-ionic surface active agent and beneficial agent is about 1:2).
As used herein, then first " delayed " value of sample by making sample retract mensuration with control mode at the same speed to the percentage elongation expected sample extension.Lagged value is minimizing or the loss of this repeated loading process capability.By to load (A l) and non-load curve (A uL) under area carry out integration and calculate this delayed percentage (% is delayed); Get they difference and with the area under load curve divided by it.% is delayed=(A l-A uL) * 100/ (A l).Use and substantially carry out these measurements according to " the band elongation rate test " that illustrate in ASTM D5035-95.Specifically, this test uses two clips, and each have two jaws, and each jaw has the face of contact sample.Clip, usually vertical, separate the identical faces Gripping material of 3 inches and moves crosshead with concrete Drawing rate.Sample size is 3 inches and takes advantage of 6 inches, and vice jaw surface height is that 1 inch and width are 3 inches and constant rate of speed is 10 inch per minute clocks.Sample is clamped in MTS (mechanical testing system) the electromechanics test frame with data acquisition ability.Test on horizontal direction and machine direction (CD & MD) at ambient conditions.Outcome record is the mean value of at least five samples.
The data restriction be not shown, Fig. 4 gives example of the present invention, use foaming with wrinkling hydroknit as base material, there is the elastic strain of about 22% to about 25% under about 100% additional strain before any fracture of display.By contrast, contrast hydroknit only there is about 15% elastic strain and rupture under about 25% additional strain.Similarly, data not shown by Fig. 5 limit, of the present invention that use foaming with wrinkling spinning building as base material have about 100% stretch under the elastic strain of about 27% to about 55%, compare, contrast before breaking, only extends to the elastic strain of about 18% about 50% under stretching.The data display be not shown, the elastic stretching (recovery) that Fig. 7 shows operating direction (MD) stretches to loading.The HYPOD of the present invention's display owing to paper handkerchief base material existing foaming dispersion combines foaming the increase of stretching.Present invention show the elastic stretching be not more than under about 30% elastic stretching=simultaneously the plain paper handkerchief of base fiber is presented at about 18% additional strain about only 8% of being taken aback under about 80% additional strain.The data restriction be not shown, Fig. 8 shows paper handkerchief of the present invention and strains additional strain the transverse direction (CD) that untreated paper handkerchief base material contrasts.As shown, compared with base fiber element paper handkerchief, the present invention uses the beneficial agent of foaming as HYPOD dispersion is in conjunction with on paper handkerchief base material there is the highest elastic stretching until lost efficacy.
Therefore, although untreated non-woven substrate can represent break-draw or percentage elongation, they generally so represent at the commitment stretched.Generally speaking, traditional untreated base material can represent the elongation at break of about 8% to about 45%.But the present invention, makes the base material processed as described herein be presented in the elongation at break of more than the elongation at break of about 45%.Such as, the present invention can represent about 45%, or about 47% to about 55%, to about 80%, to about 280%, to about 337%, or to about 350% elongation at break.Especially for some base material that wherein elongation at break is usually low, the present invention can provide about 25%, and about 30%, about 35%, the elongation at break of about 38%, about 45% or about 47%.Such stretching can be illustrated in especially according to paper handkerchief base material of the present invention.
When with when untreated base material compares similarly, non-woven substrate of the present invention will represent at least about 5%, at least about 20%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, or at least about 100% delayed reduction.Volume Test as described herein measures, and compared with untreated base material, it also represents at least about 20%, at least about 25%, at least about 50%, at least about 70%, at least about 80%, at least about 90%, at least about 100%, at least about 110%, at least about 125%, at least about 200%, at least about 225%, or the increase of volume at least about 250%.
Again, in presence or absence when, the present invention will increase volume and/or the elasticity of base material, and the present invention is at the HYPOD of foaming separately volume and/or elasticity is represented when dispersion.Without limitation, untreated hydroknit base material can represent the elongation at break of about 87% delayed and about 25%.But hydroknit base material of the present invention, can represent the elongation at break of about 67% delayed and about 337%.Similarly, untreated spunbond base material can represent the elongation at break of 100% delayed and about 45%, and spunbond base material of the present invention can represent the elongation at break of about 40% delayed and about 280%.Therefore, the invention provides the multifunctionality of enhancing, it is by making usually not provide flexible base material not only can stretch and easily can recovering and exceed the normal and expection character of the similar base material without process of the present invention.
The material with larger elastic strain has larger elasticity or elasticity energy.Compared with untreated base material, what base material of the present invention can represent increase stands at least about 25%, at least about 50%, at least about 75% or the ability of stretching at least about 100% additional strain.Although various base material is different, it is clear that compared with the base material correspondingly do not processed, the present invention allows the stretching strengthened.Such as, untreated hydroknit can stand the stretching of about 15% under the additional strain of about 25%.Under about 50% additional strain, this identical untreated hydroknit can not rupture through Tensile.Hydroknit of the present invention can stand about 12% under about 25% additional strain and stretch, and about 18% under about 50% additional strain stretches, and about 21% under about 75% additional strain stretches and about 23% under about 100% additional strain stretches.Similarly, untreated spinning building can stand about 10% under about 25% additional strain and to stretch and about 16% under about 50% additional strain stretches.But under about 75% additional strain, this identical untreated spinning building can not rupture through Tensile.But spinning building of the present invention, can stand the stretching of under about 25% additional strain about 17%, about 50% stretches under additional strain about 36% stretches, and under about 75% additional strain, about 46% stretches and about 54% to stretch under about 100% additional strain.
The stretching strengthened and elasticity retractility
The elastic film laminates of current existence, describe in the U.S. Patent number 8287677 of the people such as Lake that such as on October 16th, 2012 publishes those, be merged in the personal care product using non-resilient or not extensile.As a result, elastic membrane (and implementing also to be this situation at elastic yarn) must extend before surface layer pressure, and then relaxed.Because film extends/relaxes, when comparing with traditional textile material, elastic laminate material is tending towards softer.Except increasing except volume, by describing elastic laminate material visual appearance for lamination in conjunction with pattern.This visual effect is more as the accordion with peak and the paddy occurred continuously.As they are technically known, fold, usually along disposable personal care product, such as, but is not limited to women's goods, and cuff and the waistband of incontinence product and diaper are visible.Consumer feedback's display is expected thin can become fold and have the material of the aesthetics of cloth specimen vision and sense of touch very much.Therefore, more expect owing to reducing or there is no fold and more as the more level and smooth Hookean region of underwear.In addition, elastic film laminates relies on non-resilient, to promote the perception (vision with sense of touch) of cloth specimen aesthetics.At present, especially whether the aesthetics of modifying lamination material face relies on lamination post processing (such as, groove rolling) or uses high basis weight materials (the effective bonded carded web of cost).Therefore, extensile, there is relatively low basic weight and provide the face material transfer of volume more cloth-like appearance and sense of touch performance and provide and have simulation traditional textile, namely outward appearance is more as the remarkable chance of the film laminate of cloth undergarment.The present invention is by providing wrinkling non-woven substrate, and the elastic film laminates of product that is that especially have reduction or that do not have fold and provide such solution, described wrinkling non-woven substrate has the stretch capability of enhancing and the volume of increase, to send product.Non-woven substrate, when the elastic membrane stretched in conjunction with non-predetermined is to produce elastic laminate material of the present invention, compared with untreated base material, can represent and eliminate fold (100% reduce fold) or at least about 5%, at least about 10%, at least about 25% or the fold of minimum reduction at least about 50%.Wrinkling face can also for work clothes and health care clothes (especially in the bodyside of clothes), to strengthen the perception of pliability and cloth-like texture more, for the vision that strengthens and sense of touch.The wrinkling chance that also can provide the moisture wicking of enhancing, this depends on the non-woven substrate as face.
So, except above-mentioned pliability and volume strengthen and improve, the invention enables non-woven substrate such as spinning building, spunbond carded web, spun laced fabric etc. wrinkling, that make to develop the sense of touch with the such as higher volume of improvement and improvement with structure that is visual aesthetic.Because the present invention provides the foam film beneficial agent layer that subsides on non-woven substrate, it helps nonwoven fabric to keep wrinkling structure, and this structure should be favourable in lamination process.Utilize non-woven material of the present invention, such as, the structural appraisal of spinning building, shows the side that useful reagent layer coating remains essentially in non-woven material, particularly on the surface of non-woven material.Beneficial agent of the present invention mainly concentrates on the peak of corrugated material, and it can be consistent with non-woven material bounding point.Wrinkling nonwoven fabric has machine direction extendability (having the recovery of some levels) and cloth specimen visual aesthetic more, because the outward appearance (if present) of bounding point is minimized and thus reduces fold on non-woven material.When being laminated to elastic membrane/silk (and not needing tensile elasticity body in advance); result is the fibre web of lamination, and it can be incorporated to product, such as; look like and perceptual image underwear, but be to provide the protection of disposable product and the disposable personal care goods of nursing quality can be operated.Although be not limited to such goods, this can especially expect in disposable incontinence goods, and wherein adult expects to restraint at waist and the less diaper sample product of leg, so that dress produces the product of more careful dress and perception.
The wrinkling ability in extensile and retractible non-woven material face is made to be used to produce the elastic laminate material of non-predetermined stretching (not having or less fold).In order to produce laminated material, such as wrinkling non-woven material of the present invention is (with comprising the spunbonded materials of the beneficial agent layering of 8510) use adhesive to be laminated to the one or both sides of elastic membrane.As a result, beneficial agent can be attached to the side higher slice of wrinkling base material of film, to produce sense of touch and the visual cues of the laminated material of softer, cloth-like material.Because rete does not stretch and retracts, the basic weight of adjustable film is to meet physical property requirements instead of technological requirement.The invention provides the wrinkling non-woven substrate produced by various raw material.What cherish a special interest is the nonwoven fabric produced by polypropylene, polyamide, polyester, polyethylene, propylene/ethylene copolymer and other polyolefin blends.In addition, the level that adjustable is wrinkling, to provide the extendability of MD in various degree, it allows the elastic laminate material of the stretching/recovery with different amount.
Use wrinkling base material of the present invention to also provide the chance of the vision of reinforced elastomeric film laminated material and the aesthetics of sense of touch, be such as used as personal care product and be such as but not limited to those of outer cover material in women's goods, incontinence product and diaper.The adhesive lamination in wrinkling face provides softer, cloth-like appearance and tactile property, and does not need to use high basis weight materials.
The present invention presents undiscovered improvement in not by the base material of mode process provided by the invention.As described, compared with untreated base material, the sense of touch of the optional self-reinforcing of improvement of the present invention, such as pliability etc., the printing strengthened, delayed minimizing, the increase of volume, the increase of elasticity/extendability, the increase of regracting, the reduction of fold, and its combination.
Other additives
Non-woven substrate of the present invention can have the composition of additional interpolation, with provide above-mentioned outside additional benefits, such as pliability, printing strengthen, elasticity and volume.Composition can be added into the base material of beneficial agent process, to help the overall performance of base material.Specifically, at product as in personal care product, additional composition can totally help described performance or user to the experience of product.
Body fluid rheology modifier
There is provided the advantage of body fluid rheology modifier to be help non-woven substrate pack processing of the present invention containing the fluid of blood constitutent, such as, but be not limited to feminine care and bandage.Body fluid rheology modifier includes, but are not limited to mucolytic agent, mucoprotein modifier, red blood cell modifier etc., and its combination.Body fluid rheology modifier of the present invention comprises and can interact with body fluid better to help body fluid and the interactional various composition of base material or reagent.Such as, known mucolytic agent destroys in the key molecule in mucus ethylene glycol (mucus the glycol)-protein of menstrual fluid or mucin component and/or intermolecular disulfide bond, thus significantly reduces the viscoplasticity of mucus.Such reagent to be described in the U.S. Patent number 7687681 of the people such as DiLuccio published on March 30th, 2010 and to have used in this article.Mucolytic agent is by cutting off protein backbone, modifying the entanglement in 3D structure and reduction mucoprotein structure and modifying mucoprotein.These comprise non-ionic surface active agent, such as enzyme, such as papain, and carbohydrate, such as glucan, further describe respectively in the U.S. Patent number 7928282 of the people such as the U.S. Patent number 6060636 of the people such as the Yahiaoui that the U.S. Patent number as people such as the Potts that publishes on October 25th, 2011 is published on May 9th, 8044255,2000 and the Dibb that publishes on April 19th, 2011.Mucolytic agent of the present invention includes but not limited to Cys, thioglycolate (thioglycolates), dithiothreitol (DTT) (dithiotriacol) and its combination.Body fluid rheology modifier can in the present invention with about 0.1% or about 0.2% to about 5% or to about 20% or use based on the amount of the weight of beneficial agent composition.
In some base materials, non-woven material can show the blocking in the hole of being caused by red blood cell, and it causes the fluid absorption of base material and the decline of wicking capacity.Also there is the red blood cell modifier that can reduce viscosity and reduce orifice blocking.These include, but are not limited to Glucopon with describe in the U.S. Patent number 6350711 of the people such as the Potts published on February 26th, 2002 those.In addition, wherein base material is used for catching body fluid, includes but not limited to red blood cell, and the blocking in hole can cause the increase of seepage.Therefore, add the experience that such composition to non-woven substrate of the present invention can strengthen end user, thus produce favourable substrate product.
Antitack agent
In order to prevent viscoelastic fluid, such as menstruation and ight soil are attached to skin, can add antitack agent.Antitack agent can comprise at least one viscoelastic material, at least one anti-adhesive material, or it combines and can be added into non-woven substrate of the present invention.Antitack agent is described in the U.S. Patent number 7642396 of the Schroeder published on January 5th, 2010 etc.Specifically, during antitack agent is respectively used to prevent menstruation and excretion and afterwards, menstruation and/or fecal materials adhere to the skin in labia and perianal region.Suitable viscoelastic material include but not limited to the enzyme connected, the alkyl polyglycoside in alkyl chain with 8-10 carbon atom, ox lipid extract surfactant, glucan, glucan derivative and its combine.Suitable anti-attachment compounds of the present invention includes but not limited to alginic acid, β-benzylidene-butyric acid, botanical (botanicals), casein, farnesol, flavones, fucosan, galactolipid, kininogen, hyaluronate, inulin, iridoid glycoside, nano particle, perlecan, Phosphorothioate oligodeoxynucleotides, poloxamer188, polymethyl methacrylate, polysiloxanes, sulphation exocellular polysaccharide, tetrachloro ten oxide, and its combination.Antitack agent can be added into non-woven substrate of the present invention by the amount of the weighing scale about 0.01% to about 25% of viscoelastic material or anti-adhesive material.Other different amounts comprise weighing scale about 0.05% by viscoelastic material or anti-adhesive material to about 10% or about 0.1% to about 8% or about 0.1% to about 5%.
Odour controlling materials
Used according to the inventionly can give the odour controlling materials of any kind that non-woven substrate smell controls.Such smell controls to be used in personal care absorbent agent goods to be particularly useful.Such as, odour controlling materials can be the deodorization mixture of anhydrous mixture of alkalescence, the neutral and acidic smell absorbing particles of pH, describes in the U.S. Patent number 5364380 as people such as the U.S. Patent number 5342333 of the people such as the Tanzer that on August 30th, 1994 publishes or the Tanzer that publishes on November 15th, 1994.Suitable odor of the present invention controls material also can comprise odor-control system, it is reduced smell by the odorant acted in base material (such as absorbent commodity) or is reduced smell by the nose acceptor acting on user, describes in the U.S. Patent Application No. 2008249490 as people such as the Carlucci that on October 9th, 2008 submits to.Other odour controlling materials of the present invention also can comprise odor-control system, it has the material of high and low volatility by paying close attention to, those description in the U.S. Patent Application No. 2008071238 of the people such as the Sierri that such as on March 26th, 2008 submits to provide the smell of prolongation to control.Odour controlling materials further describes the U.S. Patent number 6926862 of the people such as the U.S. Patent number 8066956 of the people such as the Do published on November 29th, 2011 and the Fontenot of publication on August 9th, 2005.Odour controlling materials of the present invention includes but not limited to ammonia neutralizer, function spices, chelating agent, inorganic oxide particles, such as silica, aluminium oxide, zirconia, magnesia, titanium dioxide, iron oxide, zinc oxide, cupric oxide, sodium bicarbonate (sodium bicarbonate), activated charcoal (activated charcoal), active carbon (activated carbon), diatomite, zeolite, clay (such as, montmorillonitic clay) and its combination.According to the basic weight of non-woven substrate, the odour controlling materials of existence can be about 2gsm extremely about 80gsm, about 8gsm extremely about 40gsm, or about 12gsm to about 30gsm.
Embodiment
Following embodiment further describes and represents the embodiment in the scope of the invention.Embodiment just to explaination object and provide and be not interpreted as restriction of the present invention, because its many modification is possible within the spirit and scope of the present invention.
Embodiment 1
Dilute with water business dispersion to 30% solid level and then being foamed by Gaston unit.Stable foam is applied to the hot cylinder surface of 60 inches of calender drying cylinders.Solidification dispersion is wrinkling from dryer surface.Use foam process of the present invention as described herein, make spinning building substrate wrinkling.Then print with cyan ink the substrate of coating, wherein the ink of 100 parts mixes with the crosslinking agent of 4.5 parts by weight.Use the manual printing sample of anilox roll of 10.8bcm (1,000,000,000 cu μ m).
Foaming process conditions:
% solid in dispersion: 10-30%
Dryer temperature: 260-300 ℉
Dispersion flow velocity: 100 – 500cc/min
Mixer speed: 20% – 60%
Blow-up ratio: 5 – 30
Graphical analysis is carried out to SEM figure, to quantize untreated spinning building and to cover with the surface ink on the spinning building of beneficial agent process of the present invention.As shown in table 1, the % surface ink that the sample display of process is higher than untreated spinning building covers.
Table 1
Base material % ink covers
Spinning building contrast A (8gsm) 14.00
Spinning building contrast B (12gsm) 17.00
The spinning building (8gsm) of foaming 61.00
Embodiment 2
Dilute with water business HYPOD hYPOD 8510 solid level that polyolefin dispersion is extremely different, based on HYPOD solid, does not have or adds 50% at the most a 65N 247.This chemical composition is by the foaming of Gaston system foam cell and stable foam is applied to the hot surface of 60 inches of drying cylinders.Then, substrate subsides on the dryer surface of foam coating by being pressed in, wrinkling from dryer surface, and is wound around within the roll.
Substrate, i.e. cellulose base towel, the material of spinning building for using the method by controlling creping doctor geometry and/or draw ratio to produce elongation.
Foaming process conditions:
% solid in dispersion: 5%-30%HYPOD
Dryer temperature: 230-300 ℉
Dispersion flow velocity: 50 – 500cc/min
Mixer speed: 20 – 60%
Blow-up ratio: 5 – 30
Mechanical test-% is delayed:
MTS cupping machine model #Insight Model EL1 is used to test.With 10 inch per minute clocks traction 3 " the wide test specimen of inch until 20% strain and be then retracted to 0% strain with identical speed.Area measurement below load curve and non-load curve is that % is delayed, as shown in table 2 and 3.In addition, table 3 shows the elongation at break of each test substrate.
Table 2
The % of wrinkling cellulose towel is delayed
Table 3
The % of wrinkling spinning building and hydroknit and cellulose face tissue is delayed
% is delayed Elongation at break %
Contrast Hydroknit 87 25
The Hydroknit A of foaming 70 153
The Hydroknit B of foaming 66 337
Contrast spinning building 100 45
The spinning building A of foaming 42 124
The spinning building B of foaming 40 280
Contrast face tissue 95 29
The face tissue of foaming 65 47
Machinery Shi Yan – elasticity energy:
MTS cupping machine model #Insight Model EL1 is used to test.With 10 inch per minute clock tractives 3 " the wide test specimen of inch by being permitted multicycle load and non-load curve until the % increased strains (25,50,75 and 100).The permanent deformation amount of each circulation is measured after each cycle, as shown in table 4 according to additional strain (inch/inch).
Table 4
Elastic strain under given additional strain
Embodiment 3
Basic weight (gsm) and volume (cc/g) is quantized by the weight and thickness of measuring material, thus measurement volumes.Result display in table 5.
Table 5
Code Number Basic weight (gsm) Volume (cc/g)
Contrast spinning building 12 13
The spinning building A of foaming 16 27
The spinning building B of foaming 25 25
Test method
(1) for the hand rating test (IHR test) of tactile property:
Hand rating test (IHR) is the basic evaluation of the feel of fibrous web, its to attribute as pliability is assessed.This test is used for quick obtaining compared with the control, and whether process reform is that people is detectable and/or affect the information that pliability feels.The difference of IHR pliability data between treated fibre web and contrast fibre web reflects the degree that pliability is improved.
Experimenter in expert group is trained, assesses more accurately to provide the mean value that may provide than the consumer on average do not trained.The level data usage ratio risk analysis of regression model of the often kind of sample number into spectrum generated by expert group.This model calculates ground hypothesis panellists and carries out hierarchical arrangement program from evaluated maximum attribute to evaluated minimum attribute.The result of flexibility test is expressed as lod value.Lod is the natural logrithm of relative risk, estimates this relative risk for each numbering according to proportional hazards regression models.Larger lod shows that interested attribute has larger intensity.
Because IHR result represents with lod, more remarkable in fact than data representation of the difference of the pliability therefore improved.Such as, when the difference of IHR data is 1, in fact it represent that overall bulk softness is than contrast improvement 10 times (10 1=10), or 1,000% improve.In another embodiment, if difference is 0.2, it represents 1.58 times (10 0.2=1.58) or the improvement of 58%.
Data from IHR also can be expressed as classic form.Grade due to product depends on the product for rank, and therefore data usually may be used for doing in test relatively.When at least one product is tested in two tests, transverse test can be carried out and compare.
(2) Volume Test
The sheet thickness that sheet material volume is calculated as the damping fibre sheet material represented with micron is divided by with a gram business for every square metre of damping basic weight represented.The sheet material volume of gained represents with cubic centimetre every gram (cc/g).More specifically, sheet thickness is " for paper according to TAPPI test method T402, cardboard, the standard conditions of write by hand paper pulp and Related product and experimental atmosphere (Standard Conditioning and TestingAtmosphere For Paper, Board, Pulp Handsheets and Related Products) " and there is the T411om-89 " paper of annex 3 for stacking sheet material, cardboard, thickness (thickness (caliper)) (" Thickness (caliper) of Paper of combination cardboard, Paperboard, and Combined Board) " typical thickness of single sheet material measured.For performing the micrometer of T411om-89 for deriving from Emveco, the Emveco 200-A paper sheet thickness testing machine (TissueCaliper Tester) of Inc., Newberg, Oregon, U.S.A..The load of this micrometer is 2 kPas (kilo-Pascals), and Foot area is 2500 square millimeters, and pressure foot diameter is 56.42 millimeters, and the time of staying is 3 seconds, reduction rate be 0.8 millimeter per second.
(3) viscosity test
Viscosity uses and derives from Brookfield Engineering Laboratories, and the model of Middleboro, Massachusetts, U.S.A. is RVDV-II +brookfield viscometer (Brookfield Viscometer) measure.Measure at room temperature (23 DEG C), carry out under 100rpm, use rotor 4 or rotor 6 according to the viscosity expected.Viscosity measurement carries out record in units of centipoise.
(4) HYPOD the amount of compositions of additives test
In one aspect of the invention, HYPOD additives is by using sour resolution measurement.Sample use enough concentrated sulfuric acids and nitric acid wet ashing with destroy carbonaceous material and from cellulose matrix separating potassium ion.Then the concentration of potassium is measured by atomic absorption method.By by the HYPOD on sample potassium concn with from contrasting HYPOD a large amount of HYPOD of dispersion solution (LOTVB1955WC30,3.53%) measured value compares to measure HYPOD additives.
(5) assay method of the content of compositions of additives in paper handkerchief
Sample uses EPA method 3010A digestion.The method digests the material of known quantity by using nitric acid and makes it reach known volume to form latter stage in digestion in digester.
Use marked with date is that the EPA method 7610 in July, 1986 is analyzed on flame atomic absorption spectrophotometer, and the method is the method for the direct suction using air/acetylene torch.Use instrument for deriving from Aligent Technologies, Santa Clara, the VARIAN AA240FS of California, U.S.A..
Analyze in the following manner: use blank and five standard items to rectify an instrument.After correction, analyze second-source standard items to confirm calibration standard.In this specific case, the rate of recovery is 97% (90-110% is acceptable).Next, digestion blank and digestion standard items are analyzed.In this specific case, blank is less than 0.1ml/l and the standard items rate of recovery is 93% (83%-115% is acceptable).Then analytic sample, and after every ten samples operation standard product (90-110% is acceptable).Last in whole analysis, runs blank and standard items.
(6) basic weight
Use the basic weight of the TAPPI T410 program determination tissue sheets sample revised.Sample stacked in advance minimum 4 hours of damping under 23 DEG C ± 1 DEG C and 50 ± 2% relative humidity.After damping, sample stacked in advance for a folded 16-3 " x3 " is used moulding press and related die cutting.This area that represent tissue sheets sample is 144 inches 2or 0.0929m 2.The example of suitable moulding press is for being positioned at Islandia, N.Y. Testing Machines, Inc. the TMI DGD moulding press manufactured or be positioned at Wilmington, the fork testing machine (Swing Beam testingmachine) that the USM Corporation of Mass manufactures.The tolerance of die size is +/-0.008 inch in the two directions.Then on the analytical balance of taring, weigh sample stacking, be accurate to 0.001 gram.Following equation is used to calculate with a gram basic weight for every square meter (gsm):
Basic weight (damping)=in gram stacking weight/(0.0929m 2)
(7) geometric average tensile strength (GMT)
Geometric average tensile strength (GMT) is the square root that the tensile strength of the machine direction (MD) of drying is multiplied by the product of the tensile strength of dry transverse machine (CD), and represents with gram every 3 inches of sample width.When sample is pulled to fracture in a machine direction, MD tensile strength is the peak load of every 3 inches of sample width.Similarly, when sample is pulled to fracture in the cross machine direction, CD tensile strength is the peak load of every 3 inches of sample width.Tension curve be 23.0 DEG C ± 1.0 DEG C, under the laboratory condition of the relative humidity of 50.0 ± 2.0%, and to obtain after tissue sample balances the time being not less than four hours under this experimental condition.
Use the accurate sample cutter of JDC (Thwing-Albert Instrument Company, Philadelphia, PA, Model No.SCI 30) sample being used for test for tensile strength is cut into 3 inches (76mm) wide bar taking advantage of at least 5 inches (127mm) long in machine direction (MD) or transverse machine (CD).Tensile test is measured in MTS Systems Synergie 100 system, with the Test of 4.08 versions 4 running softwares (MTS Systems Corp., Eden Prairie, MN).
According to the intensity of underproof sample, select load cell from 50 newton or maximum 100 newton, fall between the 10-90% of load cell full scale value to make most peak load value.Gauge length between jaw is 4+/-0.04 inch (102+/-cm).Jaw uses air-supply action machine (pneumatic-action) operation, and is rubber-coated.Minimum fixture face width is 3 inches (76mm), and the general height of jaw is 0.5 inch (13mm).Crosshead speed is 10+/-0.4 inch per minute clock (254+/-10mm/min), and break sensitivity is set to 65%.
Sample in the jaw of instrument, vertically and flatly place between two parties.Then start test and terminate when sample ruptures.According to the direction of test specimen, peak load is recorded as " MD tensile strength " or " the CD tensile strength of sample." in each direction for the individual sample of often kind of sampling test ten (10), and arithmetic average is recorded as MD or the CD tensile strength values of product.Equation computational geometry average tensile strength with following:
GMT=(MD pulling force * CD pulling force) 1/2
Size disclosed herein and numerical value should not be understood to the exact numerical being strictly limited to record.On the contrary, unless otherwise specified, often kind of such size is intended to represent the numerical value recorded and the functionally equivalent scope around this numerical value.Such as, disclosed size " 40mm " is intended to represent " about 40mm.”
The all documents quoted in detailed description of the present invention, are incorporated herein by reference in relevant part; Quoting of any document should not be interpreted as admitting that it is prior art related to the present invention.Any implication of any implication of the term in this written document or definition and the term in the document introduced as reference or define is conflicted, with the implication of this term of specifying in this written document or be defined as master.
Although illustrate and described particular of the present invention, it will be apparent for a person skilled in the art that can make under the premise without departing from the spirit and scope of the present invention various other change and amendment.Therefore, attempt in the following claims to cover all such changes within the scope of the present invention and amendment.

Claims (20)

1. a non-woven substrate, it comprises:
The fibrous web of defining surface; With
Beneficial agent layer, wherein said beneficial agent is selected from compositions of additives, strengthens component and its combination;
Wherein said beneficial agent is foaming and is bonded to described fibrous web surface by creping;
With wherein said non-woven substrate when comparing with untreated base material, representing and being selected from following improvement: the increase of the sense of touch of enhancing, the printing of enhancing, delayed minimizing, volume, the increase of elasticity/extendability, the increase of regracting, the reduction of fold and its combination.
2. non-woven substrate according to claim 1, wherein when comparing with untreated base material, described improvement is selected from the delayed minimizing at least about 5%, the volume at least about 40% increases and its combination.
3. non-woven substrate according to claim 1, wherein said fibrous web is selected from paper handkerchief, ventilation dried towel, paper towel, water thorn winding fibre web, spunbond fibre web, spray fusing fibre web, altogether formed web, spunbond carded web, air-flow method fibre web, laminated material, paper, and above-mentioned composite material combination.
4. non-woven substrate according to claim 1, wherein said beneficial agent is compositions of additives, and wherein said compositions of additives is selected from polyolefin dispersion, SEBS copolymer dispersion, polyisoprene dispersion, Polybutadiene-styrene block copolymer dispersion, latex dispersion, polyvinylpyrrolidone-styrol copolymer dispersion, polyvinyl alcohol-ethylene copolymer dispersion and its polymeric dispersions combined.
5. non-woven substrate according to claim 1, wherein said enhancing component is selected from particulate, expandable microballoon, fiber, additional polymeric dispersions, flavouring agent, antiseptic, humectant, medicine and placebo.
6. non-woven substrate according to claim 4, it comprises enhancing component further, and described enhancing component is added into described polymeric dispersions with the amount of the weighing scale by dispersion about 0.5% to about 30%.
7. non-woven substrate according to claim 1, wherein said compositions of additives is selected from ethylene-acrylic acid, polyethylen-octene copolymer and its water-insoluble polyolefin copolymer combined.
8. non-woven substrate according to claim 1, wherein said compositions of additives is selected from the water-soluble polymer of synthesis, natural water-soluble polymer and its mixture.
9. non-woven substrate according to claim 8, wherein said compositions of additives is the water-soluble polymer of synthesis, and it is selected from polyalcohol, polyamine, poly-imines, polyamide, polycarboxylic acids, poly oxide, polyglycols, polyethers, polyester, copolymer and its mixture.
10. non-woven substrate according to claim 8, wherein said compositions of additives is natural water-soluble polymer, and it is selected from the cellulose of modification, the starch of modification, the protein of modification, shitosan, chitosan salt, carrageenan, agar, gellan gum, guar gum and its combination.
11. non-woven substrates according to claim 1, wherein said base material be presented at improve described printing on substrates outward appearance aspect at least about 25% improvement ink cover.
12. non-woven substrates according to claim 1, wherein, as by Volume Test measure, the volume of described base material display about 20% to about 250% increases.
13. non-woven substrates according to claim 4, wherein non-ionic surface active agent is combined with the ratio of about 1:2 with described compositions of additives.
14. non-woven substrates according to claim 1, the elastic strain that wherein said base material represents can maintain the additional strained tensile of the precontract 25% to about 100% of fracture.
15. non-woven substrates according to claim 1, wherein said base material represents the elongation at break of about more than 45%.
16. non-woven substrates according to claim 1, the elastic membrane that wherein said base material stretches in conjunction with non-predetermined, to produce the elastic laminate material of the fold minimizing with about 5% to about 100%.
17. non-woven substrates according to claim 1, it comprises the body fluid rheology modifier of about 0.1% to about 20% further.
18. non-woven substrates according to claim 17, wherein said body fluid rheology modifier is selected from mucolytic agent, and wherein said mucolytic agent is selected from Cys, thioglycolate, dithiothreitol (DTT) (dithiotriacol) and its combination; Mucoprotein modifier; Red blood cell modifier; With its combination.
19. non-woven substrates according to claim 1, comprise further be selected from about 0.01% to about 25% at least one viscoelastic material, at least one anti-attachment compounds and its combination antitack agent, wherein said viscoelastic material be selected from there is in the enzyme of connection, alkyl chain 8-10 carbon atom alkyl polyglycoside, ox lipid extract surfactant, glucan, glucan derivative and its combine; Wherein said anti-attachment compounds is selected from alginic acid, β-benzylidene-butyric acid, botanical, casein, farnesol, flavones, fucosan, galactolipid, kininogen, hyaluronate, inulin, iridoid glycoside, nano particle, perlecan, oligodeoxynucleoside phosphorothioate, poloxamer188, polymethyl methacrylate, polysiloxanes, sulphation exocellular polysaccharide, tetrachloro ten oxide and its combination.
20. non-woven substrates according to claim 1, it comprises the odour controlling materials of about 2gsm to about 80gsm further.
CN201380063287.6A 2012-12-18 2013-11-21 Substrates comprising frothed benefit agents for enhanced substrate benefits Pending CN104884703A (en)

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