CN1847474A - Meltblown web - Google Patents
Meltblown web Download PDFInfo
- Publication number
- CN1847474A CN1847474A CNA2006100824134A CN200610082413A CN1847474A CN 1847474 A CN1847474 A CN 1847474A CN A2006100824134 A CNA2006100824134 A CN A2006100824134A CN 200610082413 A CN200610082413 A CN 200610082413A CN 1847474 A CN1847474 A CN 1847474A
- Authority
- CN
- China
- Prior art keywords
- polymer
- die head
- capillary
- die
- extruding
- 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.)
- Granted
Links
Images
Abstract
An extrusion die for meltblowing molten polymers having a row of die orifices each having at least two separate polymer supply ports entering from an entrance portion of the die, each of the polymer supply ports communicating with separate rows of extrusion capillaries having exit openings at an exit portion of the die, gas supply ports entering from the entrance portion of the die and arranged laterally to the polymer supply ports, the gas supply ports communicating with gas jets extending through the die and arranged laterally to the exit openings of the extrusion capillaries, wherein the rows of extrusion capillary exit openings and the gas jets communicate with a blowing orifice in the exit portion of the die.
Description
The application is that application number is 01802291.X (PCT/US01/23972), the applying date to be the dividing an application of application for a patent for invention in July 31 calendar year 2001.
Technical field
The present invention relates to multicomponent meltblown fibers, multicomponent meltblown non woven fibre cloth and comprise the composite nonwoven fabric of multicomponent meltblown fibers.Melt blown non-woven of the present invention can be incorporated in the composite fabric that is applicable to clothes, cleaning wiping cloth, health care product and medicine parcel.
Background technology
In meltblown,, with the high speed thermal current fiber that obtains is carried out drawing-down and forms bondedfibre fabric then by molten polymer is extruded by die head.In the fibroreticulate production process of forming by meltblown fibers, it is desirable for sometimes by forming fiber more than a kind of polymeric material, wherein every kind of material can have different physical properties and provide different characteristics to meltblown fiber web.The conventional method that forms described fiber is to pass through spin processes, in the method, polymeric material mixes mutually with molten state in die cavity, and extrude together by single spinneret orifice with the form of stratiform multicomponent polymeric melt, as US6, described in 057,256, this patent disclosure side-by-side bicomponent fibre is melted and sprayed the fiber web that forms bonding entanglement to the gatherer.
Yet because the constraint of compatibility when the polymeric material that can carry out spinning is well together selected, this method has tangible limitation.
Meltblown fibers had mixed in the multiple bondedfibre fabric already, comprised compound laminated material, as spunbond-melt and spray-spunbond (" SMS ") composite sheet.In the SMS composite, skin is the spun-bonded fibre layer that intensity is provided to whole composite, and sandwich layer provides the layer of meltblown fibers of barrier properties.
A kind of new method that forms meltblown fibers and corresponding melt blown non-woven need be provided at present, and it is more suitable for producing the multicomponent meltblown fibers, and wherein can carry out optimization independently for the treatment conditions of each polymers compositions.
Summary of the invention
The present invention relates to a kind of method that forms the multicomponent meltblown fibers, comprising: with first melt processible polymer-extruded first extrusion cavities that passes through; Meanwhile with second melt processible polymer-extruded second extrusion cavities that passes through; After extruding, the described first and second melt processible polymer are fused in the bicomponent filament yarn of extruding; Utilize one high-speed gas injection stream at least, the described bicomponent filament yarn of extruding of drawing-down pneumatically is so that form described multicomponent meltblown fibers.Described bicomponent filament yarn can cut off with the injection stream of high-speed gas, so that form many thin, discontinuous multicomponent meltblown fibers.
Second embodiment of the present invention relates to the extrusion die that molten polymer is melted and sprayed, comprise that inlet part by described die head enters at least two polymer supply orifices independently, described polymer supply orifice is communicated with the capillary of independently extruding of partly locating to have outlet at die head exit, described form cooperation of extruding capillary with composite holes, at least one gas supply orifice is entered by the inlet part of die head, described gas supply orifice is communicated with at least one gas nozzle that extends through die head, and described at least one gas nozzle is arranged concentrically around the outlet of described composite holes, wherein, described capillary outlet and the described gas nozzle extruded is communicated with spinneret orifice in the die head exit part.
In the 3rd embodiment, the present invention relates to extrusion die that molten polymer is melted and sprayed, comprise row's nib, each nib comprise that the inlet part by die head enters at least two is the polymer supply orifice independently, described each polymer supply orifice is communicated with the capillary of independently extruding that exit portion at die head has outlet, the gas supply orifice is entered and is arranged with described polymer supply orifice side direction by the inlet part of die head, described gas supply orifice is communicated with the gas nozzle that extends by die head and extrudes outlet side capillaceous to arrangement with described, wherein, describedly extrude capillary outlet and described gas nozzle is communicated with spinneret orifice in the exit portion of die head.
Description of drawings
Fig. 1 is according to the die head of second embodiment of the invention or according to the simple cross-sectional view in the single mode hole of third embodiment of the invention, is used for producing the meltblown fibers that the bondedfibre fabric for the inventive method uses.
Fig. 2 is according to second embodiment of the invention, and the schematic drawing in the cross section 2 of die head is looked among Fig. 1.
Fig. 3 is the diagram that is used for Fig. 1 die head of the inventive method.
Fig. 4 is the sketch according to another design of the die head that is shown in the second embodiment of the invention among Fig. 1.
Fig. 5 is the end-view according to the third embodiment of the invention outlet of Fig. 1 die head.
Fig. 6 is the end-view according to the outlet of another design of the die head of third embodiment of the invention.
The specific embodiment
The present invention relates to a kind of method that forms multicomponent meltblown fibers and multicomponent melt blown non-woven.
Term " polyolefin " means as used herein: a large amount of saturated open chain polymeric hydrocarbons that any only is made up of carbon atom and hydrogen atom, a series of.Typical polyolefin comprises the various combinations of polyethylene, polypropylene, polymethylpentene and ethene, propylene and methylpentene monomers.
Term " polyethylene " (PE) is intended to not only comprise the homopolymers of ethene as used herein, and comprises that wherein at least 85% repetitive is the copolymer of ethylene unit.
Term " polyester " is intended to comprise such polymer as used herein, and wherein at least 85% repetitive is the condensation product of dicarboxylic acids and dihydroxylic alcohols, wherein has to form the key that ester units produced.This comprises aromatics, aliphatic series, saturated and undersaturated binary acid and dihydroxylic alcohols.Term " polyester " also comprises copolymer (as block copolymer, graft copolymer, random copolymer and alternate copolymer), mixture and modifier thereof as used herein.The common example of polyester be poly-(Polyethyleneglycol Terephthalate) (PET), it is the condensation product of ethylene glycol and terephthalic acid (TPA).
Term " meltblown fibers " and " meltblown filament " refer to melt processible polymer are extruded and entered fiber or the long filament that forms in heated at high speed gas (for example air) stream by a plurality of thin, normally circular capillaries with the form of molten thread or long filament as used herein.Described high velocity air is with the long filament drawing-down of molten thermoplastic polymer material, so that its diameter is reduced between about 0.5 and 10 micron.The normally discontinuous fiber of meltblown fibers, but also can be continuous.The meltblown fibers that is carried by high velocity air is deposited on the collection surface usually, so that form the fiber web of random dispersion fiber.
Term " multicomponent fibre " refers to any long filament or the fiber of being made up of at least two kinds of different polymer with " multicomponent filaments " as used herein, but should be understood that and comprise the such article that comprise more than two kinds of different polymer.Term " different polymer " means in each not same districts on the multicomponent fibre cross section of described two kinds of polymer and along the length direction of fiber arrange at least.Multicomponent fibre is different from by the even melt blend of polymeric material to be extruded and the fiber that obtains, does not form the district of different polymer in the latter.At these spendable described at least two kinds of different polymers compositionss can be chemically different, perhaps they can be chemically identical polymer, but has different physical characteristics, as inherent viscosity, melt viscosity, mould port expansion, density, degree of crystallinity and fusing point or softening point.For example, described two kinds of components can be linear low density polyethylene and high density polyethylene (HDPE).Each of described at least two kinds of different polymer itself can comprise the blend of two or more polymeric materials.Multicomponent fibre is also sometimes referred to as bicomponent fiber, and it comprises the fiber that formed by two kinds of components and by the fiber that forms more than two kinds of components.Term " bicomponent fibers " net as used herein " and " many conjugate fibers net " refer to the fiber web that comprises multicomponent fibre or long filament.Term " multicomponent meltblown fiber web " and " bicomponent meltblown fibers net " mean the fiber web that comprises the jet spinning multi-component fiber as used herein, described multicomponent meltblown fibers comprises at least two kinds of different polymers compositionss, wherein, fused fiber is deposited into by the drawing-down of heated at high speed air-flow and with the fibroreticulate form of random dispersion fiber and collects on the surface.
Term " spunbond " fiber means such fiber as used herein, and it is extruded molten thermoplastic polymers and form from many thin, the normally circular pore of spinnerets with the form of long filament; The diameter of wherein extruding long filament is reduced rapidly by traction then.Spun-bonded fibre normally continuous and have greater than about 5 microns average diameter.Spunbond bondedfibre fabric or nonwoven fabric are by collecting the surface as the porous screen cloth or be with the random stratification of spun-bonded fibre is formed.Spunbond cloth can bond by methods known in the art, for example by the hot-rolling press polish, perhaps by described cloth is bondd by saturated chamber.For example, described cloth can carry out the focus bonding at the many hot sticky node place that is positioned on the nonwoven fabric.
As used herein term " bondedfibre fabric, sheet material or fiber web " but mean with random fashion the structure of independent fiber, long filament or line that does not have the planar materials of identification icon with formation be set, these are different with braided fabric.
Fig. 1 illustrated use for meltblown of the present invention, according to the present invention extrusion die or the spinning piece (spinblock) of the second or the 3rd embodiment, for for simplicity, described scheme has been illustrated bicomponent system.Many materials flows extruder (multiple extruders of independent control, not shown) by polymer supply orifice 15a and 15b independent melt polymerization material flow A and B are conducted to die head 10, therein, polymer is by independently extruding capillary 16a and 16b, in preferred embodiments, described capillary has a certain degree in die head, so that independently polymerization feed streams is guided common longitudinal axis into.Yet the described capillary of extruding can be parallel to each other, but lean on enough closely each other, so that extruding the fusion that capillary promotes the melt polymerization material flow after discharging from independent.Preferably, extrude diameter capillaceous,, be more preferably less than about 0.5 millimeter preferably less than 1 millimeter less than about 1.5 millimeters.These outlets capillaceous in the die lip (die tip) 11 are provided with, when discharging by spinneret orifice 30, promote the fusion of polymer with each polymer of box lunch.Cooperate the materials flow of formation unitary composite bi-component polymeric owing to extrude capillary 16a and 16b, therefore, synthetically they are referred to as " composite holes ".By the heating gas jet with the bicomponent fiber drawing-down, described bicomponent fiber forms by polymerization feed streams is extruded by composite holes, described gas is conducted to die head by gas access 20, and being delivered to gas nozzle 21, described gas nozzle has a certain degree with the common longitudinal axis of the melt polymerization material flow of discharging by the end of extruding capillary 16a and 16b.In the angle [alpha] that comprises altogether between the gas nozzle 21 preferably between about 60 ° and 90 °.In the method, the extruder that is used for the independent control of different polymer by use, may control various processing parameters individually, as temperature, capillary diameter and the extrusion pressure of each polymer, so that make extruding optimization and still can forming the single fiber that comprises two kinds of polymer of independent polymers.
Fig. 2 is the sketch in the cross section 2 of die head 10 among Fig. 1, this figure illustrates with the plane form of frustum, illustrate the preferred configuration side by side of extruding capillary outlet end 16a and 16b, the described port of export delivers into the polymer filaments of fusion in the back taper high-speed gas that is formed by gas nozzle 21, and described gas nozzle 21 is arranged concentrically along composite holes.
Fig. 3 is the diagram according to Fig. 1, and this figure illustrates the operating process of method of the present invention by extrusion die 10.Polymer A and B carry by extrusion cavities 15a and 15b respectively independently, and entering of forcing extruded capillary 16a and 16b.End capillaceous is extruded in the long filament 40b discharge of extruding of extruding long filament 40a and polymer B of polymer A, at this moment, it is believed that the cross stream component of the power that is produced by gas nozzle 21 will work, thereby impel two polymer to be fused into bicomponent filament 40.Almost simultaneously, the longitudinal component of the power that is produced by gas nozzle 21 will work, with long filament drawing-down or stretching, so that the diameter of the bicomponent filament that stretches is reduced to about 10 microns or lower.When bicomponent filament when spinneret orifice 30 is discharged, it can be cut off, to form many thin, discontinuous bicomponent meltblown fibers 41.
Fig. 4 and Fig. 2 are similar, are to improve the sketch of design according to another of the die head 10 of second embodiment of the invention, so that form the bi-component sheath-core fiber type.In this embodiment, polymer A is extruded by central authorities and is extruded capillary 16c, and polymer B is extruded by a series of capillaries of extruding, and discharges from die head by a series of shaped form line of rabbet joint 16d, and the described line of rabbet joint is around capillary 16c end concentric arrangement.In this embodiment, composite holes comprises that central authorities extrude capillary 16c and shaped form line of rabbet joint 16d.Many heated air nozzles 21 are around the composite holes concentric arrangement.In addition, gas nozzle 21 can be substituted with the concentric annulus of composite holes.
Fig. 5 is according to the end-view of 10 outlets of the die head shown in third embodiment of the invention, Fig. 1, wherein, in a row arranging a series of compound nibs, each nib includes capillary outlet 16a and 16b, and the molten polymer extruding is entered in the gas injection stream of discharging by the line of rabbet joint 21, and the described line of rabbet joint combines with compound nib and forms spinneret orifice 30.When polymerization feed streams when each compound nib is discharged, they will form along die head 10 length directions multicomponent meltblown filament extension, the curtain shape.
Fig. 6 is another design of die head described in Fig. 5.By solid slab 64, with the template 60 of two vertical etchings and 60 ' separately, thereby form separately extrude capillary 62a and 62b.Gas nozzle that does not illustrate in the figure and template 60 and 60 ' laterally are adjacent to arrange.
What those skilled in the art will be appreciated that is to extrude configuration capillaceous and shape and can enough several different methods improve for various reasons.For example, by the cross section of processing pie thin slice shape (pie-slice) in die lip, this method can be used for the polymers compositions more than two kinds is conveyed in the fiber, with formation have band pie shaped partial cross section, the fiber of circular cross-section basically.Similarly, what those skilled in the art will be appreciated that is on production scale, may need to use many extruder/die head devices (" spinning piece "), so that obtain to collecting the abundant covering on surface, to produce acceptable nonwoven fabric or bondedfibre fabric.
The advantage of implementing the inventive method is: can control the various parameters of extruding independently for different polymers compositionss.Be transferred by different extrusion devices by doing each different polymer, if a kind of polymers compositions has and the visibly different physical characteristic of another polymers compositions, as inherent viscosity, melt viscosity, mould port expansion or fusing point/softening point, extrude parameter such as temperature, pressure, extruding capillary diameter even can change, and extrudes and make it optimization with what adapt to various polymer.
In the method for prior art, when polymer mixed, between two kinds of polymer melts, will there be the interface before melt is discharged die head.In the method, many factor affecting can not be directly controlled and are subjected at this interface.Owing to lack control to described interface, therefore, two examples with the serious problems that occur are: 1) when using two kinds of similar polymer, along with polymer begins to mix, diffusion may appear in the interface, so this fiber will be the fiber of melt blending more with respect to bicomponent fiber; With 2) tangible different if polymer has on melt viscosity, so, more full-bodied polymer may be filled the disproportionate amount of beginning ground the useful space of melt in the die head, because polymer melt can slide mutually along the interface and will produce the spinning problem, therefore, when they when die head is discharged, will cause the mismatch of two kinds of melt velocities.When two kinds of polymer are kept separating, to discharge from die head until them, above-mentioned problem will directly be controlled and therefore avoided to melt.
Should be understood that, useful in the methods of the invention melt processible polymer comprises any polymer that can be melted processing, as thermoplastic, comprise polyester, polyolefin, polyamide, as nylon type polymer, polyurethane rubber, polyvinyl, as styrene type polymer, fluoropolymer such as ethylene-tetrafluoroethylene polymer, poly-inclined to one side vinylidene fluoride, ethylene fluoride-acrylic polymers, perfluor (alkyl vinyl ether) polymer or the like.The preferred compositions of the bicomponent meltblown fibers of formation the inventive method and the polymer of double-component melt-blown method non-weaving cloth is polyethylene and poly-(Polyethyleneglycol Terephthalate).Preferably, polyethylene is a linear low density polyethylene, and its melt index (MI) is at least 10 grams and (measured according to ASTM D-1238 in/10 minutes; 2.16kg@190 ℃), the about 120-140 of the upper range of fusing point ℃, and density range is from the 0.86-0.97 grams per cubic centimter.The melt blown non-woven that comprises bi-component polyethylene/poly-(Polyethyleneglycol Terephthalate) meltblown fibers is particularly useful for the bondedfibre fabric of medicine final use, and this is because they can carry out radiation sterilization.The melt blown non-woven of this bi-component polyethylene/poly-(Polyethyleneglycol Terephthalate) can be bonded on the spunbond layer that uses in described final use usually, has intensity to provide, a well balanced composite laminates of pliability, respiratory and barrier properties.It is believed that also that in addition bi-component polyethylene/poly-(Polyethyleneglycol Terephthalate) meltblown fibers has the performance that is better than one pack system polyethylene or poly-(Polyethyleneglycol Terephthalate) meltblown fibers.Other the preferred combination of polymers that is used for the coalescent spin processes in back of the present invention comprises polypropylene/poly-(Polyethyleneglycol Terephthalate), poly-(hexamethylene diamine adipamide/poly-(Polyethyleneglycol Terephthalate), poly-(hexamethylene diamine adipamide/polypropylene and poly-(hexamethylene diamine adipamide/polyethylene.Can be contemplated that they also can be used in the method for the present invention so if some thermosetting polymer keeps molten during processing of the present invention.
Usually, fiber laydown is being collected on the surface, on moving belt or net, scrim or another fibrage.Air extractor such as suction case can be arranged under the gatherer, with the deposition of help fiber and the eliminating of gas.Fiber by melting and spraying production is high aspect ratio, discontinuous fiber normally, and its effective diameter is at about 0.5 to about 10 microns." effective diameter " of the fiber of term band irregular section equals to have the diameter of the long-pending imaginary circular fiber of same cross-sectional as used herein.Preferably, the Unit Weight of meltblown fiber web is about 2 and 40g/m
2, more preferably 5 and 30g/m
2Between, most preferably 12 and 35g/m
2Between.
Do not obeyed, it is believed that gas nozzle can break multicomponent filaments or split into even thinner long filament by the theory bundle.Resulting long filament it is believed that the multicomponent filaments that comprises that wherein every threads is made by at least two kinds of polymers compositionss that separate; Described two kinds of polymer have all prolonged the length of meltblown fibers fully, for example with configuration arranged side by side.Also it is believed that some long filaments that break in addition because multicomponent fibre is split into independently homofil, therefore can only contain a kind of polymers compositions.Degree of divided between two or more different polymers compositionss of multicomponent meltblown filament can be controlled by the selection to polymers compositions, to obtain desirable bonding degree between different polymeric areas.
The normally discontinuous fiber of fiber in multicomponent melt blown non-woven of the present invention, its mean effective diameter are between about 0.5 and 10 micron, more preferably between about 1 and 6 micron, most preferably between about 2 and 4 microns.The multicomponent melt blown non-woven is by forming from comprising as spun at least two kinds of polymer of while in the spinning piece of the extrusion die shown in the drawings the present invention.Fibre configuration in the meltblown multiple-component nonwoven fabrics preferably bi-component is arranged side by side, wherein most fibers are made by two kinds of polymers compositionss arranged side by side, the content of every kind of different polymers compositionss is between about 10 to 90 volume % according to the performance of desirable cloth, in most length the above two kinds of polymers compositionss extensions and bonding of each fiber.In addition, bicomponent fiber can be a sheath core arrangement, wherein a kind of polymer is by another surrounded, described bicomponent fiber be have more than two kinds of different polymer, the lamelliform circular cross-section of pie, or any other conventional bicomponent fiber structure.In a more preferred embodiment, more low-melting polymer is positioned at the surface portion of fiber, collects the upward bonding between the meltblown fibers of surface so that strengthen.
According to the preferred embodiment of the invention, with the polyester polymers of low inherent viscosity and polyethylene in conjunction with in case in the melt blown non-woven process units preparation double-component melt-blown method non-weaving cloth.Described low-viscosity polyester preferably comprises poly-(Polyethyleneglycol Terephthalate), its inherent viscosity is lower than about 0.55dl/g, preferably from about 0.17 to 0.49dl/g (utilizing ASTM D 2857 to measure as mentioned above), more preferably from about 0.20 to 0.45dl/g, most preferably from about 0.22 to 0.35dl/g.With described two kinds of polymer A and B fusion, filter, be metered into then in the spinning piece.The polymer of fusion is extruded by independently extruding capillary in the spinning piece, and discharge from the spinning piece by spinneret orifice, at this moment, they will contact with the gas from gas nozzle and be forced to mutually and contact, and vertically carrying out drawing-down, to form the fiber of high aspect ratio.The meltblown bicomponent fiber can be heated the gas injection stream cut off and form discontinuous fiber, yet they can be continuous fibers.Preferably, the gas injection stream produces desirable bilateral fibre cross section.
By the multicomponent meltblown fibers being collected on different sheet materials such as nonwoven fabric, textiles or the foamed plastics, can online production go out composite nonwoven fabric in conjunction with above-mentioned multicomponent meltblown fiber web.Each layer can utilize methods known in the art as connecting by hot, ultrasonic and/or adhesives.Meltblown layer and other fabric or sheet layer preferably comprise the compatible polymers component respectively, so that described each layer can hot adhesion, as boning by focus.For example, in preferred embodiments, composite laminates comprises melt blown non-woven and spunbond cloth, and each cloth includes at least a basic identical or identical polymer.In addition, each of composite sheet layer can be produced independently, carry out compound then and bonding to form composite sheet.What it is also contemplated that is, can connect and use spunbond cloth process units more than one, thereby produce the fiber web of being made by different lists or multicomponent fibre mixture.Can being contemplated that equally to connect uses melt blown non-woven process units more than one, so that produce the composite sheet that has a plurality of meltblown layers.Can be contemplated that in addition the polymer (one or more) that uses each other can be different in various cloth process unitss.When the composite sheet that only has a spunbond layer and a thin layer of meltblown fibers is produced in hope, the second spunbond cloth process units can cut out or gets rid of.
Randomly, also can be on described compound nonwoven cloth with the fluorine chemistry application of paints, thus reduce the surface energy of fiber surface, thus and increase the anti-permeability for liquids of fabric.For example, fabric can be handled with local ornamenting, to improve liquid obscures, particularly improves the block to low surface tension liquid.Many local ornamenting processing methods are known in the art, and comprise spraying, roller coat, foam coating, soak-squeezing and coating cloth etc.Common ornamenting batching comprises ZONYL
The fluorine chemistry agent (derive from DuPont, Wilmington, DE) or REPEARL
The fluorine chemistry agent (derive from Mitsubishi Int.Corp., New York, NY).Local ornamenting method can be carried out with fabric production is online, or is independently carrying out in the treatment step.In addition, described fluorine chemistry agent also can be used as and is added into the additive in the melt and is spun among the fiber.
Method of testing
Among the embodiment subsequently of explanation neutralization in the above, the method for testing below adopting is determined various listed characteristics and performance.ASTM refers to U.S. material and test association.
Fibre diameterBe measure by light microscope and report with average micron value.Melt and spray sample for each, measure the diameter of about 100 fibers and average.
Unit WeightBe measuring of fabric or sheet material per unit area quality, and measure, ASTM D-3776 is incorporated herein by reference at this by ASTM D-3776, and with g/m
2Report.
Polyester as used herein
Inherent viscosityBe to utilize 25 volume % trifluoroacetic acids and 75 volume % carrene,, in capillary viscometer, measure according to ASTM D 2857 at 30 ℃.
Frazier air gas permeabilityBe under the pressure differential of stipulating between the sheet surface, the measuring of the air mass flow by sheet material, and measure according to ASTM D 737, and with m
3/ min/m
2Report is incorporated herein by reference ASTM D 737 at this.
Embodiment
Preparation comprises the composite sheet of the meltblown fibers internal layer that is clipped between the spunbond skin in embodiment 1-4.Identical spunbond skin is used in each of these embodiment and comprises the bicomponent filament in belt leather core cross section.
Described spunbond layer is made by linear low density polyethylene (LLDPE) and poly-(Polyethyleneglycol Terephthalate) bicomponent fiber (PET); The melt index (MI) of described LLDPE is 27 grams/10 minutes (when temperature is 190 ℃, according to ASTM D-1238 measure), and it is the blend of the ASPUN 61800-34 LLDPE (both all derive from Dow) of the ASPUN 6811ALLDPE of 20 weight % and 80 weight %; The inherent viscosity of described PET is 0.53dl/g, with Crystar
4449 polyester forms derive from DuPont.With the crystallization and 120 ℃ of dryings when temperature is 180 ℃ of described mylar, so that the moisture before using is lower than 50ppm.In extruder independently, polyester is heated to 290 ℃ and polyethylene is heated to 280 ℃.Polymer extruded, filters and measure becomes the bi-component spinning piece that remains on 295 ℃, has 4000 hole/rice (in the spinneret combination 2016 holes being arranged), and design provides core-skin long filament cross section.Make polymer pass through the spinning head spinning, have the bicomponent filament of polyethylene sheath and poly-(Polyethyleneglycol Terephthalate) core with production.Each piece that spins polymer total throughput capillaceous is 1.0 Grams Per Minutes.Described polymer is measured, so that the long filament of counting 30% polyethylene (skin) and 70% polyester (core) with fibre weight to be provided.In the quench region of 15 inches (38.1 centimetres) long band quench air long filament is cooled off, described air is provided by two relative quench drums, and its temperature is that 12 ℃ and speed are 1 meter per second.Long filament is fed in the pneumatic stretching spinning head at interval 26 inches (66.0 centimetres) under the spinning piece capillary opening, long filament is stretched therein.Utilize vacuum draw, the long filament that gained is thinner, more tough, continuous substantially deposits to the shop row that move with 186 meters/minute speed and is with, and is 0.6 ounce/yard to form Unit Weight
2(20.3g/m
2) spunbond cloth.Average fibre diameter in described cloth is about 11 microns.Utilize the point bonding pattern,, the cloth that obtains is transmitted between two hot adhesion rollers, be used from transportation so that described cloth slightly is bonded to one rolling under the point pressure of 100 ℃ and 100N/cm.The spunbond cloth that slightly bonds is collected in the roller.Use description to the preparation method of the meltblown layer of each embodiment below.
Motion is with and double-component melt-blown method non-weaving cloth is laminated to the spunbond cloth of motion pushes up by bicomponent spunbond cloth is expanded to, and prepares compound nonwoven sheet in embodiment 1-4.The second spunbond cloth roller launched and the shop row to described spunbond-fusion spray cloth on, spunbond to produce-as to melt and spray-spunbond compound nonwoven cloth.Between rag oil thermometal felt wrapped roll and gloss oil thermometal felt wrapped roll, described Compound Fabric is carried out hot adhesion.The diameter of two rollers is 466 millimeters.The rag roller has the non-hardened steel surface that is coated with chromium of band argyle design, and wherein the spot size of each pattern is 0.466mm
2, the some degree of depth is 0.86 millimeter, dot spacing is 1.2 millimeters, and bond area is 14.6%.Smooth roll has the hardened steel surface.Under 120 ℃, the linear velocity of rolling point pressure and 50 meters/minute of 350N/cm, Compound Fabric is bondd.The composite sheet of bonding is collected on the roller.The final Unit Weight of each compound nonwoven sheet is about 58 gram/rice
2
Embodiment 1-4
Utilize the coalescent meltblown in back, prepare the double-component melt-blown method non-weaving cloth among these embodiment.By deriving from the Crystar of DuPont
Poly-(Polyethyleneglycol Terephthalate) and the linear low density polyethylene (LLDPE) that derives from Dow with ASPUN6806 are arranged the preparation bicomponent fiber with parallel type; The inherent viscosity of wherein said poly-(Polyethyleneglycol Terephthalate) is 0.53, the about 1500ppm of moisture; The melt index (MI) of described LLDPE is 100 grams/10 minutes (measuring according to ASTM D-1238).In extruder independently, polyethylene polymer is heated to 450 (232 ℃) and polyester polymers is heated to 572 (300 ℃).Two polymer are extruded independently, filtered and measure to the bi-component spinning piece that has the configuration of die lip shown in Fig. 6.Described die head is formed by two vertical etching plates 60 and 60 ', and described strip has parallel groove 62a and the 62b that forms therein, and the radius of described groove is 0.2 millimeter.Two etched plates by the solid slab 64 of 2 mil thick separately so that make two kinds of polymerization feed streams keep independent, until their discharge extrude capillary after till.The capillary supply that the polymerization feed streams of one of them forms by groove 62a, and the capillary supply that another polymerization feed streams forms by groove 62b.Extrude outlet opening capillaceous with spaced apart along the distance in 30 holes of die lip length direction per inch, wherein the length of die lip is about 21 inches (53 centimetres).Spinning piece die head is heated to 572 (300 ℃) and the polymer quality flow velocity to provide in the table 1, polymer is carried out spinning by capillary.With the drawing-down air heat to 310 ℃ and the air flue supply of crossing two 1.5 mm wides with the Pneumatic pipe cleaner of 9psi (62kPa).Two air flues extend on about 21 inches (53 centimetres) Route Length of capillary opening, and an air flue on one on the every limit of capillary line is placed in 1.5 millimeters of capillary opening back.Each air flue is all with angles and the planar orientation of plate 64 of 45 degree, wherein axial extrudes the convergence of capillary outlet direction for two of air flue, and total angle that comprises is 90 to spend between the air flue.Utilize two different extruders, polyethylene and poly-(Polyethyleneglycol Terephthalate) are conducted to the spinning piece.Its temperature is 265 ℃ when polyethylene is discharged extruder, and the temperature of gathering (Polyethyleneglycol Terephthalate) is 295 ℃.The mass velocity of polymer that is conducted to the spinning piece is all different for each embodiment, is listed in the table 1.On the forming web with 52 meters/componental movement, its upper surface is positioned at die lip end following 5.5 inches (14.0 centimetres) with filament collection, to produce the melt blown non-woven that is collected in subsequently on the roller.In each embodiment, the Unit Weight of described melt blown non-woven is 11.7 gram/rice
2
Embodiment 5
Utilize linear low density polyethylene (LLDPE) component and poly-(Polyethyleneglycol Terephthalate) component to prepare double-component melt-blown method non-weaving cloth; Wherein said poly melt index (MI) is 135 grams/10 minutes (measuring according to ASTM D-1238), derives from Equistar with GA594; The inherent viscosity of the report of described poly-(Polyethyleneglycol Terephthalate) is 0.53, with Crystar
Polyester (Merge4449) derives from DuPont.In extruder independently, respectively LLDPE and poly-(Polyethyleneglycol Terephthalate) are heated to 260 ℃ and 305 ℃.Respectively two kinds of polymer are extruded, and metering is to two independently in the polymer distribution device.The plane melt material flow of discharging from each distributor is filtered independently, and, extrude LLDPE for first group, extrude poly-(Polyethyleneglycol Terephthalate) for second group by extruding with the double-component melt-blown die head of two groups of linear separate wells.These holes are arranged in couples,, thereby form linearly aligned compound spinneret orifice along the die lip length direction so that make each LLDPE spinneret orifice closely near the spinneret orifice that gathers (Polyethyleneglycol Terephthalate).To arranging, so that the right direction in the line by each two spinneret orifice center of centering and linearly aligned hole is vertical, the central point between two right holes of described hole is positioned at the summit of die lip to the spinneret orifice that forms each compound spinneret orifice.Described die head has 645 pairs to be arranged in 54.6 centimetres of capillary openings on the circuit.Die head is heated to 305 ℃, and respectively with 0.16 gram/hole/minute and 0.64 gram/hole/minute throughput, LLDPE and poly-(Polyethyleneglycol Terephthalate) are carried out spinning.Drawing-down air heat to 305 ℃ and the air flue supply of crossing two 1.5 mm wides with the Pneumatic pipe cleaner of 5.5psi.Two air flues extend on 54.6 centimetres of Route Length of capillary opening, and an air flue on one on the every limit of capillary line is placed in 1.5 millimeters of capillary opening back.Respectively with the speed of 6.2 kilograms/hour and 24.8 kilograms/hour, LLDPE and poly-(Polyethyleneglycol Terephthalate) are conducted to the spinning combination, so that double-component melt-blown method non-weaving cloth to be provided, described cloth is poly-(Polyethyleneglycol Terephthalate) of LLDPE and the 80 weight % of 20 weight %.Meltblown fibers is collected on the forming net of motion by distance, forming described cloth, thereby produces the melt blown non-woven that is wound on the roller with 20.3 centimetres of die head and gatherers.The Unit Weight of described melt blown non-woven is 1.5 ounces/yard
2(50.9g/m
2), and the Frazier air gas permeability of sample is 86ft
3/ min/ft
2(26.2m
3/ min/m
2).
The comparative example A
This example is illustrated the shaping of double-component melt-blown method non-weaving cloth, wherein before discharging die lip two polymerization feed streams is converged.Use with embodiment 1-4 in identical polymer and spinning equipment, different is to have removed the solid slab 64 shown in Fig. 6, so that two polymer phases contact in extruding capillary.That uses among polymer temperature and mass velocity, die head temperature, air pressure and temperature and the embodiment 1 is identical.The Unit Weight of melt blown non-woven is 17g/m
2
Table 1
The performance of meltblown condition and melt blown non-woven
| Embodiment | LLDPE mass velocity (kg/h) | PET mass velocity (kg/h) | Weight rate (%PE) | Frazier (the m of melt blown non-woven 3/min/m 2) | The size of fiber (μ) in the melt blown non-woven | Frazier (the m of composite sheet 3/min/m 2) |
| 1 | 6 | 24 | 20 | 23.2 | 2.8 | 10.4 |
| 2 | 12 | 18 | 40 | -- | -- | 11.6 |
| 3 | 18 | 12 | 60 | -- | -- | 17.4 |
| 4 | 24 | 6 | 80 | -- | -- | 9.4 |
| 5 | 6.2 | 24.8 | 20 | 26.2 | - | - |
| A | 6 | 24 | 20 | 23.8 | 3.0 | 13.7 |
Claims (5)
1. extrusion die that melts and sprays molten polymer, comprise row's die head spinneret orifice, each die head spinneret orifice comprise that the inlet part by die head enters at least two is the polymer supply orifice independently, described each polymer supply orifice is communicated with the capillary of independently extruding that export department office at die head has outlet, the gas supply orifice is entered by the inlet part of die head and is transversely arranged with respect to described polymer supply orifice, described gas supply orifice is communicated with the gas nozzle that extends by die head and to extrude outlet capillaceous transversely arranged with respect to described, wherein, describedly extrude capillary outlet and described gas nozzle is communicated with spinneret orifice in the exit portion of die head.
2. extrusion die that melts and sprays molten polymer, comprise that inlet part by described die head enters at least two polymer supply orifices independently, described polymer supply orifice is communicated with the capillary of independently extruding of partly locating to have outlet at described die head exit, described form cooperation of independently extruding capillary with composite holes, at least one gas supply orifice is entered by the inlet part of described die head, described gas supply orifice is communicated with at least one gas nozzle that extends through die head and arranges concentrically around the outlet of described composite holes, wherein, described capillary outlet and the described gas nozzle extruded is communicated with spinneret orifice in the die head exit part.
3. according to the extrusion die of claim 1 or 2, the wherein said common relatively longitudinal axis of capillary of extruding has a certain degree.
4. according to the extrusion die of claim 1 or 2, wherein said extrusion die comprises at least two gas nozzles, and the wherein said relative common longitudinal axis with described gas nozzle of capillary of extruding has a certain degree.
5. according to the extrusion die of claim 1 or 2, wherein said extrusion die comprises at least two gas nozzles, and wherein said to extrude capillary parallel to each other, and the common relatively longitudinal axis of described gas nozzle has a certain degree.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22304000P | 2000-08-04 | 2000-08-04 | |
| US60/223040 | 2000-08-04 | ||
| US09/915688 | 2001-07-26 | ||
| US09/915,688 US6776858B2 (en) | 2000-08-04 | 2001-07-26 | Process and apparatus for making multicomponent meltblown web fibers and webs |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01802291XA Division CN1263902C (en) | 2000-08-04 | 2001-07-31 | Meltblown nonwoven fabric |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1847474A true CN1847474A (en) | 2006-10-18 |
| CN1847474B CN1847474B (en) | 2012-03-07 |
Family
ID=37077204
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610082412XA Expired - Fee Related CN100549265C (en) | 2000-08-04 | 2001-07-31 | Melt blown non-woven |
| CN2006100824134A Expired - Fee Related CN1847474B (en) | 2000-08-04 | 2001-07-31 | An extrusion die for meltblowing molten polymers |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610082412XA Expired - Fee Related CN100549265C (en) | 2000-08-04 | 2001-07-31 | Melt blown non-woven |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN100549265C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111194363A (en) * | 2017-10-06 | 2020-05-22 | 连津格股份公司 | Apparatus for extrusion and production of spun-bonded fabrics from filaments |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130098330A (en) * | 2010-08-12 | 2013-09-04 | 보마 엔지니어링 에스알엘 | Process and apparatus for spinning fibres and in particular for producing a fibrous-containing nonwoven |
| JP7352946B2 (en) * | 2019-09-05 | 2023-09-29 | ヤマシンフィルタ株式会社 | melt blowing equipment |
| WO2022104644A1 (en) * | 2020-11-19 | 2022-05-27 | 蔡欣航 | Method for manufacturing composite fiber article |
| CN114750436B (en) * | 2022-04-18 | 2024-01-05 | 江苏大学 | Device and method for uniformly preparing inclined angle type multicomponent composite film |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3134959B2 (en) * | 1992-03-17 | 2001-02-13 | チッソ株式会社 | Composite melt blow spinneret |
-
2001
- 2001-07-31 CN CNB200610082412XA patent/CN100549265C/en not_active Expired - Fee Related
- 2001-07-31 CN CN2006100824134A patent/CN1847474B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111194363A (en) * | 2017-10-06 | 2020-05-22 | 连津格股份公司 | Apparatus for extrusion and production of spun-bonded fabrics from filaments |
| CN111194363B (en) * | 2017-10-06 | 2023-09-08 | 连津格股份公司 | Apparatus for extrusion of filaments and production of spunbonded fabrics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100549265C (en) | 2009-10-14 |
| CN1847499A (en) | 2006-10-18 |
| CN1847474B (en) | 2012-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1263902C (en) | Meltblown nonwoven fabric | |
| CN1056891C (en) | High speed spinning of multi-component fibers with high hole surface density spinnerettes and high velocity quench | |
| US6737009B2 (en) | Process and system for producing multicomponent spunbonded nonwoven fabrics | |
| CN1190535C (en) | Meltblown web. | |
| CN1282782C (en) | Meltblown web | |
| US6565344B2 (en) | Apparatus for producing multi-component liquid filaments | |
| CN1946883A (en) | Process for making fine spunbond filaments | |
| CA2458719A1 (en) | A method for making spunbond nonwoven fabric from multiple component filaments | |
| US20030057613A1 (en) | Method for preparing multiple component meltblown webs | |
| CN1303274C (en) | Meltblown web | |
| US20040209540A1 (en) | Apparatus and process for making fibrous products of bi-component melt-blown fibers of thermoplastic polymers and the products made thereby | |
| CN1847474B (en) | An extrusion die for meltblowing molten polymers | |
| US6964931B2 (en) | Method of making continuous filament web with statistical filament distribution | |
| CN1197133A (en) | Bulky nonwoven Fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: 3M INNOVATIVE PROPERTIES COMPANY Free format text: FORMER OWNER: E.I. DU PONT DE NEMOURS AND CO. Effective date: 20130122 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130122 Address after: American Minnesota Patentee after: 3M Innovative Properties Company Address before: Wilmington, Delaware, USA Patentee before: E. I. du Pont de Nemours and Co. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20190731 |