CN101798726A - Non-woven fabric and preparation method thereof - Google Patents
Non-woven fabric and preparation method thereof Download PDFInfo
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- CN101798726A CN101798726A CN200910260589A CN200910260589A CN101798726A CN 101798726 A CN101798726 A CN 101798726A CN 200910260589 A CN200910260589 A CN 200910260589A CN 200910260589 A CN200910260589 A CN 200910260589A CN 101798726 A CN101798726 A CN 101798726A
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Abstract
The invention provides a non-woven fabric, which is characterized in that the non-woven fabric is made of bi-component composite fibers in which the two components are polyester and polyamide respectively, and the bi-component composite fibers comprise radially-arrayed skeletons and splinters filled in the skeletons, which are respectively formed by the two components. The polyester comprises 0.1 to 4 percent of flux based on the total weight of the bi-component composite fibers. The flux in the polyester can increase the physical cohesive strength between the polyester and the polyamide, so that the advance fiber opening of the two components can be prevented when the two components are loosen and carded, and the smooth production of the non-woven fabric is guaranteed.
Description
Technical field
The present invention relates to the chemical fibre field, be specifically related to a kind of nonwoven fabric and preparation method thereof.
Background technology
Nonwoven fabric is a kind of non-weaving cloth, generally is to become net by staple fibre through air-flow or machinery, reinforces the cloth of the nothing braiding that forms through acupuncture or hot rolling then.Compare with general woven cloths, nonwoven fabric has protection against the tide, ventilative, pliable and tough, light weight, advantage such as easy to process, is widely used in aspects such as medical treatment, health, clothes, industry, agricultural.Mainly adopt nonwoven fabric as base cloth when for example, preparing artificial leather.
The superfine fibre artificial leather is the product that synthetic leather industry developed recently gets up, and nonwoven fabric is called the PU synthetic leather through the artificial leather of producing after PU resin (polyurethane) impregnation, and the PU synthetic leather has rich color, intensity height, be not easy characteristics such as damage.Superfine fibre PU synthetic leather be meant have fiber number less than the artificial leather of ultra-fine fiber construction of 0.33dtex, superfine fibre PU synthetic leather has surpassed natural leather at aspects such as chemical resistance, mildew-resistant sex change, quality homogeneity and machinabilitys, has good application prospects.
In the prior art, the preparation technology of superfine fibre PU synthetic leather is: first-selected form the compound islands-in-sea type fibre that comprises sea component and island component after using the co-blended spinning method with polyester and polyamide blended, fusion, extrusion molding, drafting forming, with described compound islands-in-sea type fibre cutting short-forming fiber, make nonwoven fabric then through combing lapping, acupuncture.After making nonwoven fabric, using polyurethane that nonwoven fabric is carried out impregnation handles, be about to polyurethane and be filled in the fibre gap of nonwoven fabric, place to go sea component or the island component with solvent selectivity forms polyester superfine fibre or polyamide then, finally obtains superfine fibre PU synthetic leather.
Under prior art, owing to need to adopt the removal sea component of solvent selectivity or island component to form polyester superfine fibre or superfine polyamide fiber, therefore adopt the synthetic leather that finally obtains to keep a kind of component fibers, as nylon (polyamide fiber) or terylene (polyester fiber), and the characteristics of nylon are too soft, the characteristics of terylene are that rigidity is too strong, thus, when the synthetic leather that obtains at last only keeps the nylon component, though it is soft, good hand touch, but poor rigidity cause the problem of " leather is not endured "; And when only keeping the terylene component, rigidity is too strong, and feel is hardened.In addition, to decide in the island micro fiber leather leather production process part fiber dissolved non-, cause the island number in the single precursor uncontrollable, and all there is randomness in the size on island, quantity, distribution and length thereof.
If keep these two kinds of component fibers of polyester fiber and polyamide fiber simultaneously in superfine fibre PU synthetic leather, the deflection that then can make superfine fibre PU synthetic leather can possess terylene can be taken into account the flexibility of nylon again.In order in leather, to keep two component fibers, the inventor considers, the bicomponent composite fibre that can prepare the sliver type earlier, be made into nonwoven fabric then, keep polyester components and polyamide component during impregnation polyurethane simultaneously, separate described polyester and polyamide by opening fine operation at last, form the superfine fibre of two kinds of components respectively, the deflection that so not only can make the PU synthetic leather can possess terylene can be taken into account the flexibility of nylon again, and can avoid the waste of component, reduce the unit cost of production of PU synthetic leather.
Adopt the bicomponent composite fibre of sliver type to prepare in the process of nonwoven fabric, since the physical bond intensity of polyester and polyamide a little less than, therefore fiber is being carried out in the process of shredding, combing, two components of bicomponent composite fibre can be separated in advance, promptly open fibre, bring bigger difficulty will for like this acupuncture step of nonwoven fabric, cause and can not carry out acupuncture smoothly, even can't ordinary production.
Summary of the invention
In view of this, the technical problem that the present invention solves is, a kind of nonwoven fabric and preparation method thereof is provided, and this nonwoven fabric prevents that polyester components and two components of polyamide from opening fibre in advance in shredding or combing operation in the process of preparation, thereby guarantees carrying out smoothly of nonwoven production.
In order to solve above technical problem, the invention provides a kind of nonwoven fabric, this nonwoven fabric is made by bicomponent composite fibre, bi-component in the described bicomponent composite fibre is polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, and described polyester components comprises the flux that accounts for described bi-component composite short fiber gross weight 0.1%～4%.
The present invention also provides a kind of preparation method of nonwoven fabric, comprise: bicomponent composite fibre is provided, bi-component in the described bicomponent composite fibre is polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, and described polyester components comprises the flux that accounts for described bicomponent composite fibre gross weight 0.1%～4%;
Described bicomponent composite fibre is carried out shredding, combing, be paved into fiber web then;
The described fiber web of acupuncture obtains nonwoven fabric.
Preferably, the described fiber web of described acupuncture obtains nonwoven fabric and comprises:
Described fiber web is carried out pre-needling, and the needling density of described pre-needling is 50 pins/cm
2～220 pins/cm
2
Fiber web after the described pre-needling is carried out main acupuncture, and the needling density of described main acupuncture is 1000 pins/cm
2～4000 pins/cm
2
Preferably, the needling density of described pre-needling is 80 pins/cm
2～160 pins/cm
2
Preferably, the needling density of described main acupuncture is 2700 pins/cm
2～3500 pins/cm
2
Preferably, described main acupuncture comprises the main acupuncture of two-stage at least, and back one-level master acupuncture is than high 50 pins of the needling density/cm of previous stage master acupuncture in the main acupuncture of described two-stage at least
2～150 pins/cm
2
Preferably, described skeleton portion: sliver portion is 15～30: 70～85 by weight.
Preferably, described sliver portion is a polyester components, and described skeleton portion is a polyamide component.
Preferably, described sliver portion is a polyamide component, and described skeleton portion is a polyester components.
Preferably, the surface density of described nonwoven fabric is 200g/m
2-800g/m
2
The invention provides a kind of nonwoven fabric, make by the bicomponent composite fibre that contains polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, described polyester components comprises polyester and flux, and described flux accounts for 0.1%～4% of described bicomponent fiber weight.Because the flux in the described polyester can increase the physical bond intensity between polyester components and the polyamide, like this when bicomponent composite fibre is carried out shredding, combing, can prevent that two components from opening fiber in advance, thereby guarantee carrying out smoothly of nonwoven production.
The present invention also provides a kind of preparation method of nonwoven fabric, and the fiber of use is the bicomponent composite fibre that contains polyester components and polyamide component, and described polyester components comprises polyester and flux, and described flux accounts for 0.1%～4% of described bicomponent fiber weight.Because the flux in the described polyester can increase the physical bond intensity between polyester components and the polyamide, like this when bicomponent composite fibre is carried out shredding, combing, can prevent that two components from opening fibre in advance, thereby guarantee carrying out smoothly of nonwoven production.
A kind of preferred embodiment in, by the needling density of control pre-needling and main acupuncture, can reach and make nonwoven fabric tentatively open fine purpose, like this, help in follow-up operation, bicomponent composite fibre being opened fibre.
Description of drawings
Fig. 1, spinneret pore structure schematic diagram provided by the invention;
The schematic diagram of Fig. 2, bicomponent composite fibre provided by the invention;
The SEM photo of the nonwoven fabric impregnation base cloth of Fig. 3, embodiment of the invention preparation;
The superfine fibre PU synthetic leather SEM photo of Fig. 4, embodiment of the invention preparation.
The specific embodiment
The preparation method of nonwoven fabric provided by the invention comprises:
Bicomponent composite fibre is provided, bi-component in the described bicomponent composite fibre is polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, and described polyester components comprises the flux that accounts for described bicomponent composite fibre gross weight 0.1%～4%;
Described bicomponent composite fibre is carried out shredding, combing, be paved into fiber web then;
The described fiber web of acupuncture obtains nonwoven fabric.
According to the present invention, prepare described bicomponent composite fibre, as follows: get polyester slice and flux and put into first screw extruder as polyester components and carry out mixingly, melting temperature is preferably 270 ℃～290 ℃; Get polyamide section and put into second screw extruder and carry out mixingly, melting temperature is preferably 270 ℃～290 ℃.Again polyester components after mixing and polyamide are passed through the spinnerets extrusion molding, obtain as-spun fibre, then as-spun fibre cooled off, oil, remove internal stress, drawing-off, oil, cut off the bi-component composite short fiber that obtains the sliver type.
According to the present invention, described spinnerets has the spinneret orifice of tangerine flap, as shown in Figure 1, is the schematic cross-section of spinneret orifice.Described spinneret orifice 11 cross sectional shapes are circular, comprise a plurality ofly being the skeleton extrusion cavities 11a of radial arrangement and by described skeleton extrusion cavities sliver extrusion cavities 11b at interval.Like this, two components of described polyester and polyamide can be extruded by described skeleton extrusion cavities and described sliver extrusion cavities respectively and form sliver type composite fibre, the component of extruding from described skeleton extrusion cavities forms the skeleton portion that is radial arrangement, and the component of extruding from described sliver extrusion cavities forms sliver portion.See also Fig. 2, be composite fibre cross section pattern schematic diagram, comprise the fiber reinforcement portion 2 that is radial arrangement and be filled in sliver portion 1 between the described fiber reinforcement portion.
According to the present invention, described skeleton portion: sliver portion is 15～30: 70～85 by weight, more preferably 20～30: 70～80, more preferably 22～30: 70～78.Flux in the described polyester components account for by weight described bi-component the composite short fiber total amount 0.5%～4%, be preferably 1%～3%.Described polyester components can be used as sliver portion, and this moment, polyamide component was as skeleton portion.Described polyester components also can be used as skeleton portion, and this moment, polyamide component was as sliver portion.According to the present invention, for the quantity of the skeleton extrusion cavities in the described spinneret orifice, there is no particular restriction, can be 4～20.In Fig. 1, the quantity of skeleton extrusion cavities is 8, can form the sliver fiber of 8 distinguish like this.
According to the present invention, can be with described as-spun fibre through one-level drawing-off at least, the total draft multiple is preferably 3～4 times; As-spun fibre after the drawing-off is oiled with the silanes finish, cut off behind 70 ℃～80 ℃ laxation shapings, to cut into length be 45mm～55mm, be preferably the bi-component composite short fiber of the sliver type of 47mm～52mm.Oil content in the described pair of component composite short fiber is preferably less than 0.2% of total weight of fiber.
Described polyester can be selected following at least a polymer for use: polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, poly terephthalic acid-1,4-hexamethylene dimethyl ester or poly-2,6-naphthalene diacid second diester is preferably polyethylene terephthalate and polybutylene terephthalate.
Described polyamide can be selected following at least a polymer for use: polycaprolactam (PA-6), polyhexamethylene adipamide (PA-66), nylon 46, poly hexamethylene adipamide pentanediamine, poly-hexanoyl heptamethylene diamine, polyoctamethylene adipamide, polynonamethylene adipamide, poly hexamethylene adipamide agent decamethylene diamine are preferably polycaprolactam and polyhexamethylene adipamide.
Described flux is preferably cation-modified resin, as polybutylene terephthalate (PBT) (PBT), polytrimethylene terephthalate (PTT).
According to the present invention, behind the preparation bicomponent composite fibre, described bi-component composite short fiber is carried out shredding, combing, be paved into fiber web then, the described fiber web of acupuncture obtains nonwoven fabric.
According to the present invention, described bi-component composite short fiber is carried out shredding be meant the step that staple fibre is evenly stretched with equipment such as openers well known to those skilled in the art.Described shredding preferably comprises thick shredding and smart shredding successively, and described thick shredding is the bi-component composite short fiber to be sent into first opener carry out tentatively loosely, eliminates the interaction force between the part fiber; Described smart shredding is meant that the staple fibre after the thick shredding is sent into second opener carries out smart shredding, makes fiber to enter equably and carries out carding operation in the carding machine.Described two openers can use opener well known to those skilled in the art.
According to the present invention, fiber is sent into and is carried out combing in the carding machine well known to those skilled in the art through after the shredding, and described combing is exactly through the staple fibre carding assembly single-fiber state after the shredding, forms the reticular fibre thin layer.
According to the present invention, fiber is through after the combing, and in lapping machine stack lapping, the fibroreticulate number of plies determines that according to technological requirement there is no particular restriction in the present invention with the fiber after the combing.Then multi-layered web is carried out the acupuncture operation.According to the present invention, described acupuncture operation preferably is divided into pre-needling, main acupuncture, the acupuncture of having a shave.The needling density of described pre-needling is preferably 50 pins/cm
2～220 pins/cm
2, 70 pins/cm more preferably
2～150 pins/cm
2The needling density of described main acupuncture is preferably 1000 pins/cm
2～4000 pins/cm
2, 2700 pins/cm more preferably
2～3500 pins/cm
2
According to the present invention, two-stage master acupuncture is at least preferably carried out in described main acupuncture, main acupuncture more than three grades or three grades more preferably.According to the present invention, when carrying out two-stage master acupuncture at least, back one-level master's acupuncture is preferably than high 50 pins of the needling density/cm of previous stage master acupuncture
2～150 pins/cm
2, more preferably high 70 pins/cm
2～120 pins/cm
2According to the present invention, depth of needling is preferably 1mm～11mm.
According to the present invention, the density of the nonwoven fabric that obtains is preferably 0.15g/cm
3～0.35g/cm
3, 0.17g/cm more preferably
3～0.30g/cm
3, the grammes per square metre of nonwoven fabric is preferably 280g/m
2～800g/m
2, 320g/m more preferably
2～500g/m
2
Behind the preparation nonwoven fabric, described nonwoven fabric is carried out the PVA impregnation, drying, the typing of plating again, PVA contains immersion liquid and preferably includes in mass concentration: 1%～3% polyvinyl alcohol, surplus are water.Nonwoven fabric carries out the PU impregnation again after the PVA impregnation, PU fully is filled in the fibre gap, and PU contains immersion liquid and preferably includes in mass: 12%～20% polyurethane, 1%～3.2% surfactant, surplus are DMF.Again the impregnation cloth after the described PU impregnation is sent in the solidification liquid and solidified, again through washing, the dry fine base cloth of not opening of PU impregnation that finally obtains.Described solidification liquid comprises 29%～39% DMF (dimethyl formamide), the water of surplus in mass.
After nonwoven fabric is not opened fine base cloth through the PU impregnation, can not open fine base cloth and send in the sodium hydroxide solution and soak described, concentration of sodium hydroxide solution be preferably 1-5% in mass.Do not open fine base cloth and send into to be heated in the high temperature steam box after 80-100 ℃ and use 5-20 ℃ cooling water to cool off rapidly described again.Can use ultrasonic Treatment, machinery to rub processing then, high temperature is rubbed operations such as processing and is obtained superfine fibre PU synthetic leather.Described superfine fibre PU synthetic leather can carry out processing such as napping, dyeing, flour milling, veneer.Use the superfine fibre PU synthetic leather of bicomponent composite fibre manufacturing provided by the invention to contain polyester superfine fibre and superfine polyamide fiber, therefore have the flexibility of polyamide and the hardness of polyester.
In order further to understand the present invention, the preferred embodiment of the invention is described below in conjunction with embodiment.
Embodiment 1
Get 22 parts to polyethylene terephthalate section after 170 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings, add 3 parts of fluxs when mixing, flux is a polybutylene terephthalate (PBT); Get 75 parts of polycaprolactam sections and after 85 ℃ of dryings, put into polyamide spinning screw extruder at 280 ℃ of melting mixings.
The mixing product of two screw extruders is obtained as-spun fibre through as shown in Figure 18 distinguish spinnerets extrusion moldings, following examples all adopt this spinnerets extrusion molding, obtain the as-spun fibre of 8 distinguish, described as-spun fibre is made up of fiber reinforcement portion and the sliver portion that is filled between the described fiber reinforcement, wherein fiber reinforcement portion composition is a polyethylene terephthalate, and sliver portion composition is a polycaprolactam;
Then described as-spun fibre is carried out cooling and shaping through annular cooling quench device, 22 ℃ of chilling temperatures, oil through two-sided finish oil disc again, finish is the 4wt% silicone emulsion, oil content after fiber oils is 0.4%, enter fiber barrel through traction, feeding unit, leave standstill and eliminated internal stress in 10 hours;
Then with described fiber successively through after 1.7 times, 2.1 times the drawing-off, enter crimping machine and carry out machine crimp and be shaped, the fiber after curling oils, finish is the 4wt% silicone emulsion; The staple fibre, the packing that carry out relaxation heat setting then, are cut into 50mm become finished product, and the finished product oil content is less than 0.2wt%, and the relaxation heat setting temperature is 70 ℃, measures fibre property such as table 1.
Use polyester, flux, the polyamide identical with embodiment 1 among above-mentioned four embodiment, specifically technological parameter sees Table 2:
Measure and implement 2 to embodiment 5 fibre property, list in table 1.
Embodiment 6
Get the fiber of embodiment 1 preparation, through shredding, combing, pre-needling, level Four master's acupuncture, technological parameter sees Table 3, measures the nonwoven fabric performance and lists in table 4.
When shredding and combing, be appearance and open fine problem in advance.
Embodiment 7 to embodiment 10
Above-mentioned four used fibers of embodiment are followed successively by the prepared fiber of embodiment 2 to 5, prepare nonwoven fabric through shredding, combing, pre-needling, level Four master's acupuncture, fine problem do not occur out when shredding and combing, technological parameter sees Table 2, measures the nonwoven fabric performance and lists in table 4.
Get in the embodiment 10 nonwoven fabric importing PVA impregnation machine and carry out impregnation, the PVA maceration extract comprises in mass concentration: 2% polyvinyl alcohol and excess water; Then nonwoven fabric is carried out drying at 100 ℃ and obtain the first impregnation base cloth;
Will the first impregnation base cloth import in the PU impregnation machine and carry out impregnation, the PU maceration extract comprises in mass concentration: 16% wet-method synthetic leather is with polyurethane resin P-138 (space field, Shandong chemical company provides), 2.2% sodium lauryl sulfate and surplus DMF; Obtain the second impregnation base cloth after the PU impregnation;
To solidify in the second impregnation base cloth importing coagulating basin, solidification liquid comprises in mass concentration in the coagulating basin: 35% dimethyl formamide and excess water, solidification liquid temperature are 34 ℃;
Base cloth after will solidifying cleans the back with 80 ℃ water dries at 140 ℃, makes nonwoven fabric impregnation base cloth, and scanning electron microscopic observation is used in sampling, and microscopic appearance such as Fig. 3 can be observed tangible microcellular structure.
Dried nonwoven fabric impregnation base cloth is flooded in the diluted alkaline pond, contain mass concentration in the diluted alkaline pond and be 3% sodium hydrate aqueous solution, to put into the high temperature steam box behind the nonwoven fabric impregnation base cloth behind the dipping, the steam box temperature is made as 90 ℃, to dry by the fire the nonwoven fabric impregnation base cloth that steamed then puts into 15 ℃ cold water and cools off, open fibre by ultrasonic wave again, machinery is rubbed out fibre, high temperature is rubbed out fibre, the quantity of ultrasonic processor is 7, ultrasonic intensity is made as 12A, it is 6 sections that machinery is rubbed hop count, it is 100 ℃ that high temperature is rubbed temperature, with the above-mentioned nonwoven fabric impregnation base cloth neutralisation treatment of opening after fibre is handled, washing back expanding drying makes superfine fibre PU synthetic leather, the sampling scanning electron microscopic observation, microscopic appearance such as Fig. 4 can be observed sliver portion and separate with skeleton portion, have formed superfine fibre.
Comparative example 1
Get 25 parts to polyethylene terephthalate section after 170 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings; Get the section of 75 parts of polycaprolactams and put into polyamide spinning screw extruder at 280 ℃ of melting mixings after 85 ℃ of dryings, other technology is identical with embodiment 1, obtain fiber after, by and the used identical standard of table 1, it is as follows to test fibre property:
Fiber number: average is 2.38dtex, and deviation is+5.1; Fracture strength: average is 4.57, and the CV value is 3.5%; Extension at break: average is 33.%, and the CV value is 6.8%; Crimp property: curling number is 13.5/25cm, and crimp percent is 11.1%; Length: average is 50.0mm, and deviation is-2%; The over-length fibre rate: 0, fault content 0; Less than 5.6≤Ω cm, regain is 0.83% than resistance.
Comparative example 2
Get 75 parts to polyethylene terephthalate section after 176 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings; Get the section of 25 parts of polycaprolactams and put into polyamide spinning screw extruder at 280 ℃ of melting mixings after 88 ℃ of dryings, other technology is identical with embodiment 4, obtain fiber after, by and the used identical standard of table 1, it is as follows to test fibre property:
Fiber number: average is 2.35dtex, and deviation is+5.3; Fracture strength: average is 4.56cN/dtex, and the CV value is 3.4%; Extension at break: average is 33.4%, and the CV value is 6.7%; Crimp property: curling number is 13.6/25cm, and crimp percent is 11.5%; Length: average is 50.0mm, and deviation is-2%; The over-length fibre rate: 0, fault content 0; Less than 5.8≤Ω cm, regain is 0.86% than resistance.
The composite fibre mechanical property of table 1, embodiment of the invention preparation
Table 2 embodiment 2 is to～embodiment 5 technological parameters
Table 3, embodiment of the invention non-woven fabrics craft parameter
The nonwoven fabric mechanical property of table 4, embodiment of the invention preparation
More than the preparation method of nonwoven fabric provided by the invention is described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. nonwoven fabric, it is characterized in that, make by bicomponent composite fibre, bi-component in the described bicomponent composite fibre is polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, and described polyester components comprises the flux that accounts for described bi-component composite short fiber gross weight 0.1%～4%.
2. the preparation method of a nonwoven fabric is characterized in that, comprising:
Bicomponent composite fibre is provided, bi-component in the described bicomponent composite fibre is polyester components and polyamide component, described bicomponent composite fibre comprises skeleton portion that is radial arrangement and the sliver portion that is filled in the described skeleton portion, described bi-component forms described skeleton portion and sliver portion respectively, and described polyester components comprises the flux that accounts for described bicomponent composite fibre gross weight 0.1%～4%;
Described bicomponent composite fibre is carried out shredding, combing, be paved into fiber web then;
The described fiber web of acupuncture obtains nonwoven fabric.
3. preparation method according to claim 2 is characterized in that, the described fiber web of described acupuncture obtains nonwoven fabric and comprises:
Described fiber web is carried out pre-needling, and the needling density of described pre-needling is 50 pins/cm
2～220 pins/cm
2
Fiber web after the described pre-needling is carried out main acupuncture, and the needling density of described main acupuncture is 1000 pins/cm
2～4000 pins/cm
2
4. preparation method according to claim 3 is characterized in that, the needling density of described pre-needling is 80 pins/cm
2～160 pins/cm
2
5. preparation method according to claim 3 is characterized in that, the needling density of described main acupuncture is 2700 pins/cm
2～3500 pins/cm
2
6. preparation method according to claim 3 is characterized in that, described main acupuncture comprises the main acupuncture of two-stage at least, and back one-level master acupuncture is than high 50 pins of the needling density/cm of previous stage master acupuncture in the main acupuncture of described two-stage at least
2～150 pins/cm
2
7. according to each described preparation method of claim 2 to 5, it is characterized in that described skeleton portion: sliver portion is 15～30: 70～85 by weight.
8. preparation method according to claim 7 is characterized in that, described sliver portion is a polyester components, and described skeleton portion is a polyamide component.
9. preparation method according to claim 7 is characterized in that, described sliver portion is a polyamide component, and described skeleton portion is a polyester components.
10. according to each described preparation method of claim 2 to 6, it is characterized in that the surface density of described nonwoven fabric is 200g/m
2-800g/m
2
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| CN105040156A (en) * | 2014-12-17 | 2015-11-11 | 上海凯赛生物技术研发中心有限公司 | Blended fiber and preparation method thereof and fabric comprising the blended fiber |
| CN105040156B (en) * | 2014-12-17 | 2017-08-08 | 上海凯赛生物技术研发中心有限公司 | Blended fiber and preparation method thereof and the fabric containing the blended fiber |
| CN109200676A (en) * | 2018-10-12 | 2019-01-15 | 安徽天诚环保机械有限公司 | A kind of cleaner high filtration dust-removal cloth-bag |
| CN113445152A (en) * | 2021-04-23 | 2021-09-28 | 成都产品质量检验研究院有限责任公司 | Method for preparing piezoelectric antibacterial mask filter material based on figured island microfiber modification |
| CN113445152B (en) * | 2021-04-23 | 2022-02-01 | 成都产品质量检验研究院有限责任公司 | Method for preparing piezoelectric antibacterial mask filter material based on figured island microfiber modification |
| CN113215674A (en) * | 2021-06-28 | 2021-08-06 | 江南大学 | Nanofiber, preparation method and application thereof |
| CN113215674B (en) * | 2021-06-28 | 2022-03-04 | 江南大学 | Nanofiber, preparation method and application thereof |
| CN114622344A (en) * | 2021-11-04 | 2022-06-14 | 浙江安顺化纤有限公司 | Dry preparation method of non-woven fabric and application of non-woven fabric in facial mask |
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