CN1474676A - Crosslinked cellulosic product - Google Patents
Crosslinked cellulosic product Download PDFInfo
- Publication number
- CN1474676A CN1474676A CNA018188486A CN01818848A CN1474676A CN 1474676 A CN1474676 A CN 1474676A CN A018188486 A CNA018188486 A CN A018188486A CN 01818848 A CN01818848 A CN 01818848A CN 1474676 A CN1474676 A CN 1474676A
- Authority
- CN
- China
- Prior art keywords
- product
- fibre
- cellulose
- cross
- binding agent
- 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
Links
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Images
Classifications
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- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
- A61F13/15626—Making fibrous pads without outer layers
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
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- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
- A61F2013/530489—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Textile Engineering (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Cosmetics (AREA)
Abstract
The present invention provides a bonded cellulosic fibrous product that includes crosslinked cellulosic fibers. Methods for forming the bonded cellulosic fibrous product and personal care absorbent products that include the bonded product are also provided.
Description
Invention field
Present invention relates in general to a kind of cellulosic fibrous product, particularly a kind of binder fibre cellulose fiber product that comprises cross-linked cellulose fibres.
Background of invention
Cross-linked cellulosic is added in the different fibres easily, to improve bulk density, resilience and the aridity of goods.Absorbent article, for example diaper generally by comprise absorb fiber for example the cellulose composite material of wood pulp cellulose form.When adding this type of fibrous composite in absorbent article, this type of fibrous composite can provide a kind of to has respectively by crosslinked fiber and absorbs high fluid acquisition rate that fiber introduces and the product of high liquid core suction ability advantage.Yet the fibrous composite that contains a high proportion of relatively cross filament has lower sheet intensity.
The low relatively intensity that contains the sheet of cross filament is to be accompanied by cellulose crosslinked hydrogen bond site and to cause owing to lacking.As the result of its chemical modification, cross-linked cellulosic has the less oh group that forms hydrogen bond between the fiber that can be used on.The tendency of key has hindered them on the whole and has formed layer or the net with any tangible structural integrity between the lower formation fiber of crosslinked fiber.
Personal care absorbent product for example diaper, adult-incontinence articles and feminine hygiene articles comprises liquid collecting and/or distribution layer, and these layers are used for collecting fast and then collected liquid distribution are kept to storing core.For reaching quick collection and distribution, these layers can comprise cross-linked cellulose fibres, and it gives these layers with bulk density and resilience.But, as mentioned above, comprise that the net of cross filament can lack structural integrity at high proportion.Traditionally, the solution that lacks issues of structural integrity is to comprise cross filament and with the affixed net of binding agent by sandwiching between each flimsy material and nonwoven sheet.Such structure is that to keep the net globality necessary.
Therefore, need a kind of like this cellulose net, it has the advantageous feature of the net that comprises cross-linked cellulose fibres, and also advantageously keeps its globality.The present invention explores for satisfying these needs, and further relevant advantage is provided.
Summary of the invention
On the one hand, the invention provides a kind of binder fibre cellulose fiber product that comprises cellulose fibre.In another embodiment, described product comprises binding agent.Described product can randomly comprise other independent fibers, independent absorbing material, perhaps other fibers and absorbing material.
On the other hand, the invention provides a kind of method that forms binder fibre cellulose fiber product.
On the one hand, the invention provides the absorbent article that comprises binder fibre cellulose fiber product again.Described product can combine with one or more other layers and structure in the absorbent articles such as can introducing baby diaper, adult-incontinence articles and feminine hygiene articles is provided.
The accompanying drawing summary
When connection with figures during with reference to following detailed, above-mentioned aspect of the present invention and many institutes attendant advantages will be more comprehensible, wherein:
Fig. 1 is used to form the typical case's drum forming device of product of the present invention and the sketch map of method; With
Fig. 2 is used to form the typical bags forming device of product of the present invention and the sketch map of method.
The detailed description of preferred implementation
The invention provides binder fibre cellulose fiber product, this product comprises adherent cross-linked cellulose fibres.Described product has and relevant favourable bulk density and the resilience characteristic of intrafiber crosslink connection fiber, and via the bonding favourable structural integrity of giving between the fiber.Described product is adherent net, and wherein the glued construction of cross filament and net self participates in the resilience and the liquid collecting performance of net.
In the present invention, bonding between the fiber can be by realizing with cross-linking agent and/or adhesive treatment fiber.In one embodiment, product by with cross-linking agent and when needing crosslinking catalyst handle cross-linked cellulose fibres and form.In another embodiment, product is by forming with the adhesive treatment cross-linked cellulose fibres.In another embodiment, product by with cross-linking agent and when needing crosslinking catalyst combine the processing cross-linked cellulose fibres with binding agent and form.
Described product can followingly form: (1) forms the net of cross-linked cellulose fibres; (2) with (a) cross-linking agent and crosslinking catalyst when needing, (b) binding agent or (c) cross-linking agent and crosslinking catalyst and adhesive treatment net when needing; (3) adherent temperature and time heats described net between the crosslinked and fiber to be enough to cause between fiber.
In one embodiment, binder fibre cellulose fiber product comprises in-situ cross-linked cellulose fibre.Term as used herein " in-situ cross-linked cellulose fibre " means cross-linked cellulosic in net formation process.Therefore, described product can be different from and comprise the net that forms and introduce subsequently the cross-linked cellulose fibres in the net in advance in net formation process.
For the product that comprises in-situ cross-linked cellulose fibre, since fiber in net formation process crosslinked (promptly, in position), the cellulose fibre that product comprises intrafiber crosslink connection (promptly, the fiber that in each fiber, has cross-bond), described these fibers have carried out crosslinked between fiber (that is the fiber that, has cross-bond between fiber).Described product has adherent structure, and comprises the cellulose fibre of intrafiber crosslink connection, this fiber further through between fiber cross-bond and adjacent fibre crosslinked.Described product has and relevant favourable bulk density and the resilience characteristic of intrafiber crosslink connection fiber, and via the bonding structural integrity of giving between the fiber.Described product is a bonded web, and wherein the glued construction of cross filament and net self participates in the resilience and the liquid collecting performance of net.
Described product can followingly form: (1) forms the net of cellulose fibre, described cellulose fibre to small part with cross-linking agent with crosslinking catalyst processing when needing; (2) to be enough to causing crosslinked temperature and time to heat described net.Described product also can followingly form: (1) forms cellulosic fibrous web; (2) with cross-linking agent and when needing crosslinking catalyst handle net; (3) to be enough to causing crosslinked temperature and time to heat described net.
Be applicable to that the fiber that forms product of the present invention comprises with cross-linking agent crosslinking catalyst processing and subsequent drying and cellulose fibre of cure-crosslinking agent not when needing.These fibers dry and that handled can be introduced forming device and be used for subsequent product formation.
When needing, arbitraryly in numerous cross-linking agent and the crosslinking catalyst can be used for preparing product of the present invention.Following representational available cross-linking agent and the catalyst listed.Following each patent is incorporated herein by reference in full.
Suitable urea groups cross-linking agent comprises the ureas of replacement, the ring-type urea that for example methylolated urea, methylolated ring-type urea, methylolated low alkyl group ring-type urea, methylolated dihydroxy ring-type urea, dihydroxy ring-type urea and low alkyl group replace.Concrete urea groups cross-linking agent comprises dimethyl dihydroxy urea (DMDHU, 1,3-dimethyl-4,5-dihydroxy-2-imidazolone), dihydroxymethyl dihydroxy ethylidene-urea (DMDHEU, 1,3-dihydroxy methyl-4,5-dihydroxy-2-imidazolone), dimethylol urea (DMU, two [N-hydroxymethyl] urea), dihydroxy ethylidene-urea (DHEU, 4,5-dihydroxy-2-imidazolone), dimethylol ethylene urea (DMEU, 1,3-dihydroxymethyl-2-imidazolone) and dimethyl dihydroxy ethylidene-urea (DDI, 4,5-dihydroxy-1,3-dimethyl-2-imidazolone).
Suitable crosslinking agent comprises dialdehyde such as C
2-C
8Dialdehyde (for example Biformyl) has the C of at least one aldehyde radical
2-C
8The oligomer of dialdehyde acid-like substance and these aldehyde and dialdehyde acid-like substance, as USP4,822,453; 4,888,093; 4,889,595; 4,889,596; 4,889,597; With 4,898, described in 642.Other suitable dialdehyde crosslinking agent comprise as USP4 853,086; 4,900,324; With 5,843, those described in 061.
Other suitable crosslinking agent comprise aldehyde and urea groups formaldehyde adduction product.Referring to, for example, USP3,224,926; 3,241,533; 3,932,209; 4,035,147; 3,756,913; 4,689,118; 4,822,453; 3,440,135; 4,935,022; 3,819,470; With 3,658,613.
Suitable crosslinking agents comprises the Biformyl adduct of ureas, USP4 for example, 968,774, and Biformyl/ring-type urea adduct, USP4 for example, 285,690; 4,332,586; 4,396,391; 4,455,416; With 4,505, described in 712.
Other suitable crosslinking agent comprise carboxylic acid cross-linking agent, for example polycarboxylic acid.At USP3,526,048; 4,820,307; 4,936,865; 4,975,209; With 5,221, multi-carboxylic acid cross-linking agent's (for example, citric acid, tricarballylic acid and butanetetra-carboxylic acid) and catalyst have been described in 285.USP5,137,537; 5,183,707; 5,190,563; 5,562,740; With 5,873, the C that contains at least three carboxyls has been described in 979
2-C
9Polycarboxylic acid (for example citric acid and oxygen di-succinic acid) is as the application of cross-linking agent.
Polymeric polycarboxylic acid also is a suitable crosslinking agent.Suitable polymeric polycarboxylic acid crosslinked dose at USP4, and 391,878; 4,420,368; 4,431,481; 5,049,235; 5,160,789; 5,442,899; 5,698,074; 5,496,476; 5,496,477; 5,728,771; 5,705,475; With 5,981, address in 739.Polyacrylic acid and related copolymers as cross-linking agent at USP6,306,251; 5,549,791; Address in 5,998,511.The poly cross-linking agent is at USP5, addresses in 998,511.
Concrete suitable multi-carboxylic acid cross-linking agent comprises citric acid, tartaric acid, malic acid, succinic acid, 1,3-propanedicarboxylic acid, citraconic acid, itaconic acid, tartrate monosuccinic acid, maleic acid, polyacrylic acid, polymethylacrylic acid, poly, poly-(methyl vinyl ether-be total to-maleate) copolymer, poly-(methyl vinyl ether-be total to-itaconate) copolymer, acrylic copolymer and maleic acid.
Other suitable crosslinking agent are at USP5, and 225,047; 5,366,591; 5,556,976; Address in 5,536,369.
Appropriate catalyst comprises ackd salt such as ammonium chloride, ammonium sulfate, aluminum chloride, magnesium chloride, magnesium nitrate, and the alkali metal salt of phosphorated acid.In one embodiment, crosslinking catalyst is a sodium hypophosphite.
Also can use cross-linking agent and mixture of catalysts or blend.
The amount of employed cross-linking agent should be enough to cause between above-mentioned intrafiber crosslink connection and fiber crosslinked in cellulosic fibrous product.The described consumption that is applied to cellulose fibre is based on about 1 weight % of total weight of fiber about 10 weight % extremely.In one embodiment, dosage of crosslinking agent is to about 6 weight % based on about 4 weight % of total weight of fiber.
The suitable cellulose fibre that forms product of the present invention is that those skilled in the art is known, comprise any can be crosslinked and can form any fiber or the fibre blend of fleece or layer.
Though can obtain from other sources, cellulose fibre is mainly taken from wood pulp.Suitable wood pulp fibers used in the present invention can be from known chemical method, the kraft paper pulp-making method and the sodium sulfite process acquisition that for example have following bleaching or do not bleach.Also can use thermomechanometry, chemi thermo mechanical method or its combined method processing pulp fibres.Preferably chemically process pulp fibres.Also can use and grind timber fiber, recovery or secondary wood pulp cellulose and bleaching or unbleached wood pulp cellulose.Also can use cork or hardwood.Selecting the details of wood pulp cellulose is that those of ordinary skill in the art knows.These fibers also can buy from some companies, comprise assignee of the present invention Weyerhaeuser Co..For example, the available cellulose fibre of being made by pine broom of the present invention can buy from Weyerhaeuser Co., and it is numbered: CF416, NF405, PL416, FR516 and NB416.
The available wood pulp cellulose of the present invention also can carry out pretreatment before use.This pretreatment can comprise physical treatment, for example fiber is carried out steam treatment or chemical treatment.
Though should not be construed as restricted contents, the pretreated example of fiber comprises other liquid that use surfactant or modify the fiber surface chemical property.Other pretreatment comprise adds antibacterial, pigment, dyestuff, thickening agent or softening agent.Also can use with other chemicals for example thermoplasticity and the pretreated fiber of thermosetting resin.Also can use pretreated combination.After forming fiber product, also can in last handling process, similarly handle.
Also can be according to the cellulose fibre of the present invention's use with granule agglomerant known in the art and/or multiviscosisty/softening auxiliary agent processing.Granule agglomerant is used for other materials, and for example superabsorbent polymer and other materials stick on the cellulose fibre.Use cellulose fibre that suitable granule agglomerant and/or multiviscosisty/softening auxiliary agent is handled and above-mentioned preparation and the bonded technology of cellulose fibre are disclosed in the following United States Patent (USP): (1) patent No. No.5,543,215, exercise question " polymeric binder of bonded particulate to the fiber "; (2) patent No. No.5,538,783, exercise question " the non-polymer organic binder bond of bonded particulate to the fiber "; (3) patent No. No.5,300,192, exercise question " but wet-laying fibre plate made from the reactivate binding agent of bonded particulate to the binding agent "; (4) patent No. No.5,352,480, exercise question " but using the reactivate binding agent " with the method for particle bond to the fiber; (5) patent No. No.5,308,896, exercise question " granule agglomerant that is used for high-bulk fibre "; (6) patent No. No.5,589,256, exercise question " granule agglomerant of fortifying fibre multiviscosisty "; (7) patent No. No.5,672,418, exercise question " granule agglomerant "; (8) patent No. No.5,607,759, exercise question " with particle bond to fiber "; (9) patent No. No.5,693,411, exercise question " is bonded to binding agent on the fiber with water-soluble granular "; (10) patent No. No.5,547,745, exercise question " granule agglomerant "; (11) patent No. No.5,641,561, exercise question " with particle bond to fiber "; (12) patent No. No.5,308,896, exercise question " granule agglomerant that is used for high-bulk fibre "; (13) patent No. No.5,498,478, exercise question " Polyethylene Glycol is as the fiber binder material "; (14) patent No. No.5,609,727, exercise question " fiber product that is used for bonded particulate "; (15) patent No. No.5,571,618, exercise question " but bonded particulate reactivate binding agent to the fiber "; (16) patent No. No.5,447,977, exercise question " granule agglomerant that is used for high-bulk fibre "; (17) patent No. No.5,614,570, exercise question " absorbent article that contains the high-bulk fibre of being with binding agent "; (18) patent No. No.5,789,326, exercise question " fiber of adhesive treatment "; And (19) patent No. No.5,611,885, exercise question " granule agglomerant ", above-mentioned patent is hereby incorporated by.
Except that natural fiber, also can in product, add the synthetic fibers that comprise polymer fiber, for example polyolefin, polyamide, polyester, polyvinyl alcohol, polyvinyl acetate ester fiber.Suitable synthetic fibers comprise, for example, and polyethylene terephthalate, polyethylene, polypropylene, nylon and rayon fiber.The multicomponent fibre that other suitable synthetic fibers comprise those fibers of being made by thermoplastic polymer, comprise thermoplastic polymer with other fibers of cellulose fiber peacekeeping and the wherein at least a component of thermoplastic polymer bag quilt.One pack system or multicomponent fibre can be made by polyester, polyethylene, polypropylene and other traditional thermoplastic fiber materials.One pack system and multicomponent fibre can obtain from the commercial channel.Suitable bicomponent fibre comprises the CELBOND fiber that can obtain from Hoechst-Celanese Company.Product also can comprise natural and combinations synthetic fibers.
In one embodiment, product also comprises binding agent.Binding agent is used for further strengthening the structural integrity of product.Suitable bonding comprises thermoplastic, for example bicomponent fibre and latex, and wet strengthening agent.When binding agent is thermoplastic fibre, described fiber can be combined with cellulose fibre, form net then and carry out follow-up heating.When binding agent is wet strengthening agent, can the crosslinked condition of net experience fiber (promptly solidifying) is preceding to put on net with binding agent making.
Suitable thermoplastic fibre comprises other fibers of cellulose fiber peacekeeping with thermoplastic polymer bag quilt, and wherein at least a component comprises the multicomponent fibre of thermoplastic polymer.One pack system or multicomponent fibre can be made by polyester, polyethylene, polypropylene and other traditional thermoplastic fiber materials.One pack system and multicomponent fibre can obtain from the commercial channel.Suitable bicomponent fibre comprises the CELBOND fiber that can obtain from Hoechst-Celanese Company.
Suitable wet strengthening agent comprises the have nitrogen-containing group cation-modified starch of (as amino), for example can be from National Starch and Chemical Corp., and Bridgewater, the starch that NJ obtains; Latex; Wet powerful resin is polyamide-epichlorohydrin resins (as Hercules, Inc., Wilmington, the commodity KYMENE 557LX of DE) for example, and polyacrylamide resin is (referring to for example U.S. Pat P3,556,932; Also for example from American Cyanamid Co., the polyacrylamide that Stanford, CT are purchased, trade mark is called PAREZ 631 NC); Ureaformaldehyde and melamino-formaldehyde resin, and polyethylene imine resin.The relevant general discussion of using and generally can be used for wet powerful resin of the present invention in field of papermaking, can be referring to the 29th phase of TAPPI subject series " wet strength in paper and the cardboard " (Wet Strengthin Paper and Paperboard) (New York, nineteen sixty-five) by pulp and paper industry technical tie-up meeting editor.
In other embodiments, product can comprise other fibers.Other fibers comprise for example cellulose fibre, particularly above-mentioned wood pulp cellulose, and Fructus Cannabis, bagasse, Cotton Gossypii, ground timber, bleaching or unbleached paper pulp, recovery or secondary stock.
Wish that therein product can further comprise absorbing material (for example superabsorbent polymer granule) in the product embodiment of liquid reservation." absorbing material " speech used herein is meant and absorbs liquid and generally have material than the absorptive capacity that the cellulose fibre component is bigger in the composite.Preferably, this absorbing material is water-swollen, generally is water-insoluble polymeric material, and having in saline (saline as 0.9%) is about at least 5 times of himself weight, desirable is about 20 times, preferably about 100 times or more absorptive capacity.
The amount of absorbing material can change a lot according to the purposes of product in the product.With the product gross weight is benchmark, and the amount of absorbing material can be greater than about 0.5 weight % in the product.
Absorbing material can comprise natural material such as agar, pectin and guar gum and synthetic material such as synthetic water gelatin polymer.The synthetic water gelatin polymer comprises, for example, the polymer of carboxymethyl cellulose, polyacrylic alkali metal salt, polyacrylamide, polyvinyl alcohol, ethenyl maleic anhydride copolymer, polyvinylether, hydroxypropyl cellulose, polyvinyl ethers, vinyl sulfonic acid and copolymer, polyacrylate, polyacrylamide and polyvinyl pyridine etc.In a kind of specific embodiment, absorbing material is a high-absorbent material." high-absorbent material " speech used herein is meant and can absorbs a large amount of fluidic polymeric materials by expanding and forming hydrated gel (being hydrogel).Except absorbing a large amount of fluids, high-absorbent material can also keep its very a large amount of intravital fluids under middle pressure.
High-absorbent material generally is divided three classes: starch graft copolymer, the hydrophilic polypropylene acid esters of cross-linked carboxymethyl cellulose derivant and modification.The example of these absorbing polymerics comprise hydrolyzed starch-acrylonitrile graft copolymer, in and starch-acrylate graft copolymer, the cross-linking polyvinyl alcohol of saponification acrylate-vinyl acetate co-polymer, hydrolyzed acrylonitrile copolymer or acrylamide copolymer, modification, in and self-crosslinking polyacrylic acid, crosslinked salt polyacrylate, carboxylation cellulose and in and cross-linked isobutylene-copolymer-maleic anhydride.
High-absorbent material can be purchased, and for example, polyacrylate can be purchased from the Clariant of Portsmouth in Virginia.These superabsorbent polymers have different sizes, form and adsorption property (can obtain from Clariant, for example commodity IM 3500 by name and IM3900).Other high-absorbent material can SANWET trade mark (being provided by Sanyo Kasei KogyoKabushiki Kaisha) and SXM77 trade mark (the Stockhausenof Greensboro by the North Carolina state provides) purchase.Other high-absorbent material is described in USP4, and 160,059; USP4,676,784; USP4,673,402; USP5,002,814; USP5,057,166; USP4, in 102,340 and USP4,818,598, all these documents all are incorporated herein by reference.Add product that high-absorbent material is arranged such as diaper at USP3, be described in 699,103 and USP3,670,731.
The suitable high-absorbent material that can be used in the described product comprises high-absorbency particles and high absorbent fiber.
In one aspect of the invention, provide the method that forms binder fibre cellulose fiber product.In one embodiment, product uses the drum forming machine to form.In another embodiment, product uses bag forming machine to form.
As mentioned above, product of the present invention forms in the following way: make comprise with cross-linking agent and when needing under crosslinking catalyst and the introducing situation net experience of the cellulose fibre of adhesive treatment be enough to cause crosslinked (curing) and the adherent temperature and time of fiber.The cross-linking agent that is used for preparing product solidifies available several different methods and carries out.Crosslinked temperature of generally having relatively high expectations (180 ℃) and long response time (greater than 4 minutes).In one embodiment, product makes high temperature and a large amount of air by described net in described curing oven by add thermosetting in curing oven.In another embodiment, after placing the box that transports, net solidifies.In this embodiment, contain the box of handling net and pass an exsiccator (for example kiln formula exsiccator) to finish cross-linking reaction.
In one embodiment, bag shaping (mold) technology is used in the preparation of product.In the method, fiber (for example, with the cross-linking agent and the cross-linked cellulose fibres of catalyst treatment when needing, and optional thermoplastic fibre; Perhaps with the cross-linking agent and the cellulose fibre of catalyst treatment when needing, and optional thermoplastic fibre) is introduced into forming device, this forming device comprises bag or the mold that makes fiber form required form (for example, will being used in the shape that absorbs the collecting region in product such as baby diaper, adult-incontinence articles or the fem-care).For embodiment that does not comprise thermoplastic fibre and the embodiment that do not comprise for example wet strengthening agent of another binding agent, can before curing, binding agent be put on fiber.For not comprising the embodiment that imports the cellulose fibre of handling with cross-linking agent to forming machine, can put on fiber at the cross-linking agent of naming a person for a particular job of the time before fiber solidifies.
In one embodiment, product is wherein to be formed with the bag of having handled cellulosic fibrous web by heating to prepare.By this method, the bonded web with required form directly forms.By this method, the continuous net with required form can form and be packaged into to be prepared to transport and by in the box that absorbs the follow-up use of production person.
In one embodiment, product forms by air-laid cross-linked cellulose fibres and bicomponent fibre.
In another embodiment, product forms by air-laid cross-linked cellulose fibres and wet strengthening agent.
In another embodiment, product by air-laid cross-linked cellulose fibres and cross-linking agent and when needing catalyst form.
In another embodiment, product forms in the following way: air-laid is with cross-linking agent and crosslinking catalyst is handled when needing cellulose fibre and bicomponent fibre, and fiber is put with cure-crosslinking agent with cause fiber bonding in the heated air stream shop then.
Product of the present invention can form extrudes net or sheet, and this net or sheet have structural integrity and the sheet intensity that is enough to allow fleece roll-in, transportation and is used for following process with the roll-in form.
Product of the present invention can also can easily be introduced in the following process in the supply of fiber roll-in form.Product of the present invention can advantageously be incorporated in the various absorbent articles, and for example diaper comprises disposable diaper and sport pants; Fem-care comprises sanitary towel, tampon and trousers liner; Adult-incontinence articles; Towel; Surgery and dentistry sponge; Binder; Food plate mat or the like.
The operating characteristic of representative bonded web formed according to the present invention (bonded web that comprises in-situ cross-linked fiber) sees below described.Compared with the control, (MDP cm) lists in the table 1 for the collection rate (ml/ second) to four liquid intrusions of representative bonded web, rewetting (g), intermediate value absorption pressure (MUP) capacity (g/g) and intermediate value desorbing pressure.
In table 1, contrast A relate to have a cross-linked cellulose fibres collecting layer be purchased baby diaper (Procter ﹠amp; Gamble); Contrast B relate to have two collecting layers be purchased baby diaper (PAMPERS), described pair of collecting layer is by synthetic layer of a 44gam and 300gsm cross filament (citric acid cross filament) layer formation.Net 1A, 2A, 1B and 2B relate to mainstream product of the present invention.Net 1A and 1B relate to the product that the cellulose fibre of using citric acid cross-linking agent (accounting for about 6 weight % of total weight of fibers) and catalyst treatment by 100 weight % flash dryings forms.Net 2A and 2B relate to the cellulose fibre of using citric acid cross-linking agent (accounting for about 6 weight % of total weight of fibers) and catalyst treatment by 90 weight % flash dryings, and the product of 10 weight % bi-component viscose fibres (CELBOND T105) formation.The target basis weight of net 1A and 2A is 150g/m
2, the target basis weight of net 1B and 2B is 300g/m
2
The operating characteristic of table 1. mainstream product
| Net | Density (g/cm 3????) | Basis weight (g/m 2) | Collection rate (ml/ second) | Rewetting (g) | MUP capacity (g/g) | ??MDP( ??cm) | |||
| ????1 | ????2 | ????3 | ????4 | ||||||
| Contrast A | ????0.08 | ??300 | ??3.07 | ????1.65 | ???0.80 | ???0.44 | ???0.87 | ????-- | ????-- |
| Contrast B | ????0.08 | ??344 | ??3.37 | ????1.68 | ???0.91 | ???0.52 | ???0.80 | ????-- | ????-- |
| Net 1A | ????0.046 | ??142 | ??3.38 | ????1.86 | ???0.97 | ???0.50 | ???0.22 | ???13.1 | ???16.9 |
| Net 2A | ????0.041 | ??152 | ??3.94 | ????2.08 | ???1.08 | ???0.58 | ???0.18 | ???15.6 | ???14.3 |
| Net 1B | ????0.046 | ??275 | ??5.26 | ????2.86 | ???1.48 | ???0.87 | ???0.27 | ???13.1 | ???16.9 |
| Net 2B | ????0.042 | ??294 | ??6.60 | ????3.40 | ???1.90 | ???1.02 | ???0.17 | ???14.7 | ???15.2 |
Further, the invention provides the absorbent article that comprises binder fibre cellulose fiber product.The structure that provides in the absorbent articles such as can introducing baby diaper, adult-incontinence articles and fem-care can be provided with one or more other layers described product.
Preferred implementation of the present invention is illustrated and describes, and should be understood that to carry out various changes under the situation that does not deviate from the present invention's spirit and protection domain.
Claims (34)
1. prepare the method for cellulosic fibrous product, comprising:
(a) the air-laid cross-linked cellulose fibres are to provide fleece;
(b) handle net with binding agent with the amount that adhesive product effectively is provided; With
(c) heating net is bonding to cause between the fiber, so that binder fibre cellulose fiber product is provided.
2. the process of claim 1 wherein that binding agent comprises latex.
3. the process of claim 1 wherein that binding agent comprises wet strengthening agent.
4. the method for claim 1 also comprises and adopts cross filament air-laid thermoplastic fibre.
5. the process of claim 1 wherein that fleece also comprises other cellulose fibres.
6. the process of claim 1 wherein that fleece also comprises absorbing material.
7. adherent cellulosic fibrous product comprises the cross-linked cellulose fibres of air-laid, and described cross-linked cellulose fibres have used binding agent to handle with the amount that binder fibre cellulose fiber product effectively is provided.
8. the product of claim 7, wherein binding agent comprises latex.
9. the product of claim 7, wherein binding agent comprises wet strengthening agent.
10. the product of claim 7, wherein binding agent comprises thermoplastic fibre.
11. the product of claim 7 also comprises other cellulose fibres.
12. the product of claim 7 also comprises absorbing material.
13. prepare the method for cellulosic fibrous product, comprising:
(a) the air-laid cellulose fibre to be to provide fleece, wherein handles with the amount that adhesive product effectively is provided with cross-linking agent to the small part cellulose fibre; With
(b) heating net is to provide adherent cellulosic fibrous product.
14. the method for claim 13 also comprises and adopts cellulose fibre air-laid thermoplastic fibre.
15. the method for claim 13, wherein fleece also comprises other cellulose fibres.
16. the method for claim 13, wherein fleece also comprises absorbing material.
17. binder fibre cellulose fiber product, it comprises the cellulose fibre of air-laid, wherein handles with the amount that adhesive product effectively is provided with cross-linking agent to the small part cellulose fibre.
18. the product of claim 17 also comprises thermoplastic fibre.
19. the product of claim 17 also comprises other cellulose fibres.
20. the product of claim 17 also comprises absorbing material.
21. prepare the method for cellulosic fibrous product, comprising:
(a) the air-laid cellulose fibre to be to provide fleece, wherein handles with the amount that adhesive product effectively is provided with cross-linking agent to the small part cellulose fibre;
(b) handle net with binding agent with the amount that adhesive product effectively is provided; With
(c) heating net is to provide binder fibre cellulose fiber product.
22. the method for claim 21, wherein binding agent comprises latex.
23. the method for claim 21, wherein binding agent comprises wet strengthening agent.
24. the method for claim 21 also comprises and adopts cellulose fibre air-laid thermoplastic fibre.
25. the method for claim 21, wherein fleece also comprises other cellulose fibres.
26. the method for claim 21, wherein fleece also comprises absorbing material.
27. binder fibre cellulose fiber product comprises the cellulose fibre of air-laid, described cellulose fibre is handled with the amount that binder fibre cellulose fiber product effectively is provided with binding agent, wherein handles with cross-linking agent to the small part cellulose fibre.
28. the product of claim 27, wherein binding agent comprises thermoplastic fibre.
29. the product of claim 27, wherein binding agent comprises latex.
30. the product of claim 27, wherein binding agent comprises wet strengthening agent.
31. the product of claim 27 also comprises other cellulose fibres.
32. the product of claim 27 also comprises absorbing material.
33. personal care absorbent product comprises claim 7,17 or 27 arbitrary described products.
34. the product of claim 33, wherein product is at least a in baby diaper, adult-incontinence articles and the women sanitary articles.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24835000P | 2000-11-14 | 2000-11-14 | |
| US24826000P | 2000-11-14 | 2000-11-14 | |
| US60/248,350 | 2000-11-14 | ||
| US60/248,260 | 2000-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1474676A true CN1474676A (en) | 2004-02-11 |
Family
ID=26939234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA018188486A Pending CN1474676A (en) | 2000-11-14 | 2001-11-14 | Crosslinked cellulosic product |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20020112296A1 (en) |
| EP (1) | EP1358051A2 (en) |
| JP (1) | JP2004526871A (en) |
| CN (1) | CN1474676A (en) |
| AU (1) | AU2002233966A1 (en) |
| BR (1) | BR0115341A (en) |
| CA (1) | CA2427654A1 (en) |
| MX (1) | MXPA03004202A (en) |
| NO (1) | NO20032154L (en) |
| WO (1) | WO2002040234A2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3558638B2 (en) * | 1994-03-25 | 2004-08-25 | ウェヤーハウザー・カンパニー | Multiply cellulose products using bulky cellulose fibers |
| US7195695B2 (en) * | 2003-10-02 | 2007-03-27 | Rayonier Products & Financial Services Company | Cross-linked cellulose fibers and method of making same |
| US7513973B2 (en) * | 2004-03-31 | 2009-04-07 | Weyerhaeuser Nr Company | Bleached polyacrylic acid crosslinked cellulosic fibers |
| US20080000603A1 (en) * | 2006-06-29 | 2008-01-03 | Neogi Amar N | Covalent Bonding of Carboxylated Cellulose Fiber Webs |
| KR100786974B1 (en) | 2007-03-16 | 2007-12-17 | 이승인 | Pollution-free urea resin and method for producing tenacity viscose rayon filament yarn using the same |
| US8496784B2 (en) * | 2011-04-05 | 2013-07-30 | P.H. Glatfelter Company | Process for making a stiffened paper |
| US9133583B2 (en) | 2011-04-05 | 2015-09-15 | P.H. Glatfelter Company | Process for making a stiffened paper |
| SE542866C2 (en) | 2018-04-04 | 2020-07-21 | Stora Enso Oyj | Method for manufacturing a dry-laid mat for thermoforming |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4204054A (en) * | 1975-10-20 | 1980-05-20 | S. A. Beghin-Say | Paper structures containing improved cross-linked cellulose fibers |
| US4252761A (en) * | 1978-07-14 | 1981-02-24 | The Buckeye Cellulose Corporation | Process for making spontaneously dispersible modified cellulosic fiber sheets |
| US5225047A (en) * | 1987-01-20 | 1993-07-06 | Weyerhaeuser Company | Crosslinked cellulose products and method for their preparation |
| US5486167A (en) * | 1991-01-03 | 1996-01-23 | The Procter & Gamble Company | Absorbent article having blended multi-layer absorbent structure with improved integrity |
| EP0943025A1 (en) * | 1996-12-06 | 1999-09-22 | Weyerhaeuser Company | Air-laid unitary absorbent layer |
-
2001
- 2001-11-14 MX MXPA03004202A patent/MXPA03004202A/en not_active Application Discontinuation
- 2001-11-14 AU AU2002233966A patent/AU2002233966A1/en not_active Abandoned
- 2001-11-14 WO PCT/US2001/046004 patent/WO2002040234A2/en not_active Application Discontinuation
- 2001-11-14 JP JP2002542584A patent/JP2004526871A/en active Pending
- 2001-11-14 CN CNA018188486A patent/CN1474676A/en active Pending
- 2001-11-14 CA CA002427654A patent/CA2427654A1/en not_active Abandoned
- 2001-11-14 US US10/002,373 patent/US20020112296A1/en not_active Abandoned
- 2001-11-14 BR BR0115341-2A patent/BR0115341A/en not_active IP Right Cessation
- 2001-11-14 EP EP01984969A patent/EP1358051A2/en not_active Withdrawn
-
2003
- 2003-05-13 NO NO20032154A patent/NO20032154L/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004526871A (en) | 2004-09-02 |
| BR0115341A (en) | 2004-02-03 |
| CA2427654A1 (en) | 2002-05-23 |
| NO20032154D0 (en) | 2003-05-13 |
| AU2002233966A1 (en) | 2002-05-27 |
| WO2002040234A3 (en) | 2002-09-06 |
| US20020112296A1 (en) | 2002-08-22 |
| EP1358051A2 (en) | 2003-11-05 |
| MXPA03004202A (en) | 2003-09-22 |
| NO20032154L (en) | 2003-05-13 |
| WO2002040234A2 (en) | 2002-05-23 |
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