CN215163569U

CN215163569U - Filament non-woven composite cloth and production device thereof

Info

Publication number: CN215163569U
Application number: CN202023121760.8U
Authority: CN
Inventors: 龚金瑞; 刘维国
Original assignee: HANGZHOU NBOND NONWOVENS CO LTD
Current assignee: HANGZHOU NBOND NONWOVENS CO LTD
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-12-14
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to a non-woven materials field discloses a long filament non-woven composite cloth and apparatus for producing thereof, and this long filament non-woven composite cloth includes the aggregate that comprises long filament fiber and ultrashort fibre. Wherein the filament fibers are synthetic fiber filaments; the ultrashort fibers are hydrophilic ultrashort fibers; the hydrophilic ultrashort fibers are distributed in the synthetic fiber filament, and the hydrophilic ultrashort fibers and the synthetic fiber filament are mutually entangled and/or the hydrophilic ultrashort fibers are adhered and fixed on the synthetic fiber filament. The filament non-woven composite cloth of the utility model has the characteristics of high breaking strength, difficult scrap falling, soft hand feeling and good hygroscopicity.

Description

Filament non-woven composite cloth and production device thereof

Technical Field

The utility model relates to a non-woven materials field especially relates to a long filament non-woven composite cloth and apparatus for producing thereof.

Background

Spunlace nonwoven fabrics, also known as spunlaced nonwovens, are made by spraying high pressure fine water streams onto one or more layers of fibrous webs to entangle the fibers with each other, thereby consolidating the web. The spunlace nonwoven technology is flexible entanglement reinforcement, and does not influence the original characteristics of the fibers and damage the fibers. Therefore, the spunlace nonwoven fabric has the characteristics of soft hand feeling, good air permeability, high hygroscopicity, small strength loss and the like, and is particularly suitable for various sanitary materials.

201410565949.6 discloses a composite spunlace nonwoven fabric and a preparation method thereof, comprising a wiping layer and a non-wiping layer, wherein the wiping layer is made of 100% wood pulp paper material, and the non-wiping layer is made of 100% polyester fiber material. The non-wiping layer is formed by 100% of polyester fibers through cross lapping and spunlacing, and the wiping layer and the non-wiping layer are compounded through spunlacing. The specification states that the longitudinal-transverse strength ratio of the composite spunlace nonwoven fabric is controlled to be 2: 1 or less, and the longitudinal and transverse strength is close, so that the steel plate is not easy to deform; the thickness is thin, no scraps are dropped, the cloth is soft after moisture absorption, and the wiping effect is good; the wear resistance is good, the wiping efficiency is improved by 20%, the service life is prolonged by 30%, and the service performance of the wiping cloth is effectively improved.

The specification describes: by adopting the technical scheme, 68.3g/m²The water absorption capacity of the wood pulp composite spunlaced nonwoven fabric is 480 percent. The scheme has the disadvantage of low water absorption capacity of the material.

Patent 201820214895.2 discloses a three-dimensional spunlace nonwoven fabric, which comprises a plurality of large protruding points, wherein a first thin area and a second thin area are respectively and fixedly arranged between the adjacent large protruding points, small holes are arranged between the adjacent second thin areas, and the small holes are positioned between the adjacent second thin areas. The utility model provides a three-dimensional water thorn non-woven fabrics has big bump, three gradient unevenness's structure and mesh, uses to feel plump, cleans effectually, is the clean material of ideal. Tests show that the product produced by adopting the technical scheme has a density of 70g/m²The longitudinal breaking strength of the spunlaced nonwoven fabric is 191.5N/5 x 10cm, and the transverse breaking strength isThe strength was 30N/5 x 10 cm. The defects of the scheme are that the difference of the longitudinal and transverse breaking strengths of the product is large, and the transverse breaking strength is lower.

Patent 201510117516.9 discloses a production process of an ultra-thin antibacterial spunlace surgical wiping material, belonging to the technical field of textile materials, wherein mixed fibers of hydrophilic polyester fibers and viscose fibers are selected as raw materials and are sequentially fed into a long curtain, a horizontal opener and a large-bin cotton mixing box; then, carrying out layered treatment by a first fine opener and a second fine opener, feeding the raw materials treated by the first fine opener into a first cotton storage box, a first airflow cotton box, a first carding machine, a cross lapping machine and a drafting machine in sequence, and feeding the raw materials treated by the second fine opener into a second cotton storage box, a second airflow cotton box and a second carding machine in sequence; and then overlapping the two layers of raw materials, and sequentially performing a spunlace process, an antibacterial treatment process, a drying process, an online detection process, a coiling process, a foam dyeing process and a slitting process. The ultrathin antibacterial spunlace surgical wiping material disclosed by the invention has the advantages of good hygroscopicity, air permeability, sterility and comfort, and good longitudinal moisture conductivity. The disadvantage of this solution is the low breaking strength of the material.

At present, the conventional spunlace nonwoven materials on the market are mainly divided into dry-laid materials and wet-laid materials. The dry spunlace nonwoven material is mostly made by carding, netting and spunlacing of viscose, terylene and other textile short fibers (the length is generally 30-40 mm). Because short fibers are used as raw materials, the longitudinal and transverse breaking strength of the spunlace material is limited to a certain extent. The wet-laid spunlace nonwoven material is generally prepared by adopting materials such as ultra-short fibers, wood pulp and the like through wet-laid and spunlace reinforcement. Such wet spunlace nonwoven materials are most commonly used in disposable flushable hygiene articles where the breaking strength of the product is low.

In recent years, companies have utilized chemical fiber spinning principles to produce spun-bonded spunlaced nonwovens from continuous filaments laid into a web during polymer spinning and then hydroentangled. Although the breaking strength of the spun-bonded spunlace nonwoven material is high, the product has poor hygroscopicity and hard hand feeling due to the adoption of 100% chemical fiber components, is not suitable for disposable sanitary materials, and the application range of the product is influenced.

In view of the above problems in the prior art, there is a need to develop a differentiated spunlace nonwoven material with high breaking strength and good moisture absorption to meet the needs of the medical and sanitary material markets.

SUMMERY OF THE UTILITY MODEL

In order to solve the powerful low of current short fiber water thorn non-woven materials fracture, fall the bits easily, the conventional hygroscopicity of spunbonded nonwoven material is poor, the stiff scheduling problem of feeling, the utility model provides a long filament non-woven composite fabric and apparatus for producing the same, the utility model discloses constitute by filament and ultrashort fibre and have high fracture power, be difficult for falling bits, soft, the good characteristics of hygroscopicity of feeling.

The utility model discloses a concrete technical scheme does:

in a first aspect, the present invention provides a filament nonwoven composite fabric comprising an aggregate of filament fibers and ultra-short fibers. The filament fibers are synthetic fiber filaments; the ultrashort fibers are hydrophilic ultrashort fibers; the hydrophilic ultrashort fibers are distributed in the synthetic fiber filament, and the hydrophilic ultrashort fibers and the synthetic fiber filament are mutually entangled and/or the hydrophilic ultrashort fibers are adhered and fixed on the synthetic fiber filament.

Preferably, the synthetic fiber filaments are monocomponent filaments or bicomponent filaments.

Preferably, the monocomponent filament has a C-shaped section or a hollow section with a microporous surface. Furthermore, when the hollow surface is provided with a micropore structure, micropores on the surface of the single-component filament are communicated with the hollow.

At present, most of synthetic fiber filaments in the existing spun-bonded spunlace material are of circular structures, and the side surfaces of the filaments are smooth, so that the fibers are not only not favorably entangled, but also the water absorption and water guide performance of the spunlace material is not favorably improved. Therefore, the utility model discloses the research and development team adopts C type cross-section and hollow cross-section surface to take microporous two kinds of structural style on the basis of having carried out a large amount of experimental research, solves the problem that prior art exists.

When the C-shaped cross section structure is adopted, the method is equivalent to axially slotting on the outer surface of the round filament, and the surface area of the fibers is increased, so that the probability of mutual hydroentanglement among the fibers can be improved, and the stability of the material structure is facilitated; in addition, the filament surface of the C-shaped section structure is concave, which is beneficial to material water storage and rapid water guide and provides space for the entry of ultra-short fibers. When the surface micropore structure of the filament hollow belt is adopted, the surface micropores are communicated with the hollow part, so that the material is favorable for absorbing water and the diffusion of water.

The research and development team believes that the above two structures are particularly suitable for medical and sanitary materials and various cleaning materials. In actual application, the selection can be carried out according to different requirements of various products.

Preferably, the bicomponent filaments have two side-by-side schemes:

the first scheme is as follows: the bicomponent filament is of a parallel structure with a special-shaped section, namely the section of the filament is a non-circular special-shaped section, the two components are arranged in parallel, and the melting points are different.

At present, most of the existing bi-component fibers are in a skin-core structure with a circular cross section, the melting point of a skin component is lower than that of a core component, and the structure has the advantages of large skin contact area and high bonding fastness, but has the defects of stiff hand feeling of materials, smooth and straight cloth cover and unsuitability for medical and sanitary materials with soft hand feeling. Therefore, after long-term experimental research, the research and development team thinks that the problem of the prior art can be solved by adopting the filament with the special-shaped parallel structure.

Compared with the filament fiber with the circular cross section, the filament fiber with the special-shaped cross section has larger surface area, and the interval between the fibers is increased, thereby being beneficial to fiber entanglement in the spunlace process, providing space for the accommodation of the ultrashort fibers and improving the water storage performance of the material. Two components with different melting points are arranged in parallel, when the material is subjected to high-temperature heat treatment (generally at the temperature of more than 110 ℃), the low-melting-point component is melted, and the ultra-short fibers can be bonded and fixed on the surface of the low-melting-point component, so that the bonding and reinforcing effects among the fibers are achieved, and the chip falling performance of the material is improved (the ultra-short fibers are easy to fall off from an aggregate). Meanwhile, along with the melting of the low-melting-point component, single-side thermal shrinkage occurs on a single filament, so that the original straight filament is bent and deformed, the bulkiness of the material is improved, and the hand feeling of the material is improved.

Scheme II: the double-component filament is a hollow section radial structure, namely the filament is a hollow section, and the two components are arranged and distributed in a radial shape at the center.

Preferably, the surface of the hollow-section radial structure in the two components is provided with micropores; further, the micropores are communicated with the hollow.

The utility model discloses extrude formation bicomponent fiber from the spinneret orifice after filtering the measurement respectively with two kinds of different polymer melts, and cross sectional shape is cavity emission type (the shape design through the spinneret orifice realizes). The fibers of the two components are arranged alternately. By adopting the section structure, when the synthetic fiber filament is impacted by high-pressure water flow, the filament fibers made of two different materials are stressed and split and stripped mutually, so that the original filament is split into a plurality of filaments (such as 16 or 32 filaments), and the original filament fiber net is separated into the superfine filament fiber net. The density of the ultra-fine filament fiber net after splitting and stripping is greatly improved, so that the ultra-short fibers are favorably intertwined with the ultra-fine filament fiber net, and the problem that the ultra-short fibers run off from the filament fiber net is solved. In addition, the radiation type bi-component fiber adopts the hollow type and surface micropore design, which is beneficial to improving the fiber opening rate of the superfine fiber in the subsequent spunlace processing, and can better improve the water absorption of the material and improve the hand feeling of the material.

Preferably, the melting point of the component with the lower melting point in the special-shaped cross section parallel structure is 110-130 ℃.

Preferably, the synthetic fiber filaments are crimped filaments.

The ultrashort fiber has short length, and the common synthetic fiber filament has smooth surface, straight appearance and lack of elasticity, and is easy to separate from each other. Therefore, the ultrashort fibers and the common synthetic fiber filaments are not easy to tangle and fall off, and a large amount of ultrashort fibers are lost. The utility model discloses a carry out the mode of deformation processing to ordinary synthetic fiber, give the synthetic fiber filament with the form of curling. The synthetic fiber filament with the crimp shape enlarges the space occupied by the fiber in the transverse direction, increases the bulkiness of the synthetic fiber filament assembly, enables the fiber to shrink in the longitudinal direction and have certain elastic elongation, and increases the longitudinal deformability of the material. The arrangement can increase the probability of mutual entanglement of the synthetic fiber filament and the ultrashort fiber, thereby improving the fiber entanglement cohesive force. Meanwhile, the thickness of the material is increased, the accommodating space of the material for liquid and solid is enlarged, the moisture absorption of the material is improved, the hand feeling of the material is improved, the material is soft and fluffy, the use requirement of the disposable sanitary material is met, and multiple purposes are achieved.

Preferably, the hydrophilic ultrashort fibers are plant pulp or cellulose fibers.

Plant pulp and cellulose base fibre all have good hygroscopicity, accord with the utility model discloses the design requirement of product, can reach the beneficial effect of the utility model.

Preferably, the plant pulp is wood pulp;

preferably, the plant pulp is bamboo pulp;

preferably, the plant pulp is cotton pulp;

preferably, the plant pulp is hemp pulp.

Preferably, the length of the hydrophilic ultrashort fiber is 2 to 18 mm.

The length of the ultra-short fiber has great influence on the material performance, and if the length of the ultra-short fiber is too short, the fiber is easy to run off in the processing process, and the wet-process fiber net is not easy to transfer; the ultra-short fiber is too long, so that the ultra-short fiber is not easy to disperse in water, and is easy to generate flocculation in slurry, thereby affecting the product quality and the production efficiency. The utility model discloses the research and development team is through the repetition test, confirms above-mentioned ultrashort fiber length to be the preferred scope.

Preferably, the official moisture regain of the hydrophilic ultrashort fibers is more than or equal to 7 percent.

Preferably, the cellulose fibers are natural cellulose fibers or man-made cellulose fibers.

In a second aspect, the utility model provides a filament non-woven composite fabric apparatus for producing, include: the device comprises a spinning and web-forming unit, a wet-forming unit, a superposition conveying unit, a spunlace composite unit and a drying unit.

Preferably, the spunlaid unit sequentially comprises a slicing bin, an extruder, a melt metering pump, a spinning device, a cooling device, a drafting device, a deforming device and a lapping device according to the process.

Preferably, the overlapping conveying unit comprises a net supporting curtain, a pre-wetting device and a pre-spunlace device; the net supporting curtains are connected end to form a loop capable of circularly rotating; the output end of the lapping device is connected with the input end of the net supporting curtain; a pre-wetting device and a pre-spunlace device are sequentially arranged on one side of the net supporting curtain according to the advancing direction of the net supporting curtain, and a vacuum suction device A and a vacuum suction device B are respectively arranged on the opposite sides of the pre-wetting device and the pre-spunlace device.

Preferably, the wet-laid unit comprises a slurry preparation system, an inclined wire former, a forming wire and a dewatering device; the forming nets are connected end to form a loop capable of circularly rotating, and the inclined net former and the dewatering device are sequentially arranged along the rotating direction of the forming nets; the input end of the inclined net former is connected with the output end of the slurry preparation system; the output section of the forming net is connected with a station on the net supporting curtain behind the pre-spunlace device.

Preferably, the slurry preparation system comprises a dispersing device, a metering pump, a liquid storage device, a fan pump and a slurry distributor which are sequentially connected; and stirrers are arranged in the dispersing device and the liquid storage device.

Preferably, the spunlace unit comprises a plurality of flat-screen spunlace heads, a round drum spunlace device and a vacuum suction device C which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs are arranged above the net supporting curtain and positioned on the inner side of the forming net; a vacuum suction device C is arranged below the net supporting curtain corresponding to each flat net water stabs; the drum spunlace device is positioned behind the output end of the net supporting curtain;

preferably, the drying unit is positioned after the circular drum spunlace device, and a vacuum suction device D is arranged in the drying unit.

Preferably, the circular drum spunlace device comprises a circular drum and a plurality of circular drum spunlace heads facing the circumferential surface of the circular drum.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a synthetic fiber long filament fiber net carries out coincide water thorn with the ultrashort fiber net of hydrophilicity and consolidates, and the long filament non-woven composite fabric of making not only has higher breaking strength, has good hygroscopicity moreover, can satisfy the operation requirement in fields such as disposable sanitary material, industry cleaning material.

(2) The utility model adopts the structure that the surface of the C-shaped section or the hollow section is provided with the micropores, thereby enhancing the entanglement efficiency between the fibers; the water absorption and water guide performance of the single-component filament non-woven composite cloth is improved.

(3) The utility model discloses an adopt special-shaped cross-section side by side type bicomponent structure composite fiber's mode, fix the ultrashort fiber bonding on the synthetic fiber filament surface, not only play bonding reinforcing effect between the fibre, improved falling bits nature of material, also improved the feeling of material simultaneously.

(4) The utility model discloses an adopt cavity radiation type bi-component, and the surface is equipped with microporous structure, make former long filament fiber net become superfine fiber net through water thorn separation in advance, improved the density of long filament fiber net, improved ultrashort fibrous tangling effect, solved the problem that ultrashort fibre runs off in water thorn processing, also further improved the hydroscopicity of material simultaneously, improved the material and felt.

(5) The utility model discloses adopt the filament to warp the device in the preparation process of long filament fiber net, make straight filament become the crimping state, not only increased synthetic fiber filament and the mutual probability of tangling of ultrashort fibre, improved fibre tangling cohesion force, also increased material thickness simultaneously, increased the material to the accommodation space of liquid and solid, improved the hygroscopicity of material, improved the material and felt.

(6) The utility model discloses filament non-woven compound cloth apparatus for producing reasonable in design, convenient operation have solved this technical field and have not the problem of filament non-woven compound cloth professional equipment, provide new equipment solution for developing filament spunlace new product.

Drawings

Fig. 1 is a schematic structural diagram of a filament nonwoven composite fabric according to the present invention;

FIG. 2 is a schematic connection diagram of a device for producing filament non-woven composite fabric according to the present invention;

FIG. 3 is a schematic structural view of a single-component filament with a C-shaped cross section according to the present invention;

FIG. 4 is a schematic structural view of a single-component filament with a hollow cross-section and micro-pores on the surface;

FIG. 5 is a schematic structural view of a special-shaped cross-section side-by-side bicomponent filament according to the present invention;

fig. 6 is a schematic structural view of a hollow cross-section radial bicomponent filament according to the present invention.

The reference signs are: the production process comprises the following steps of (1) filament fiber 1, ultra-short fiber 2, filament non-woven composite cloth 3, a slicing bin 101, an extruder 102, a melt metering pump 103, a spinning device 104, a cooling device 105, a drafting device 106, a texturing device 107, a lapping device 108, an inclined wire former 201, a forming wire 202, a dewatering device 203, a dispersing device 204, a liquid storage device 205, a fan pump 206, a pulp distributor 207, a metering pump 208, a supporting wire curtain 301, a pre-wetting device 302, a pre-hydro-entangling device 303, a vacuum suction device A304, a vacuum suction device B403, a flat wire hydro-entangling head 401, a circular drum hydro-entangling device 402, a vacuum suction device C and a vacuum suction device D404.

Detailed Description

The present invention will be further described with reference to the following examples.

General examples

A filament nonwoven composite fabric 3, as shown in FIG. 1, comprises an aggregate of filament fibers 1 and ultra-short fibers 2. The filament fibers are synthetic fiber filaments; the ultrashort fibers are hydrophilic ultrashort fibers; the hydrophilic ultrashort fibers are distributed in the synthetic fiber filament, and the hydrophilic ultrashort fibers and the synthetic fiber filament are mutually entangled and/or the hydrophilic ultrashort fibers are adhered and fixed on the synthetic fiber filament.

Optionally, the synthetic fiber filaments are monocomponent filaments or bicomponent filaments. The single-component filament is of a C-shaped section or hollow section surface with a micropore structure; when the structure with the hollow surface provided with the micropores is adopted, the micropores on the surface of the filament are communicated with the hollow.

Optionally, the bicomponent synthetic fiber filament is of a parallel structure with a special-shaped cross section, that is, the cross section of the filament is a non-circular special-shaped cross section, the two components are arranged in parallel and have different high and low melting points, wherein the melting point of the low melting point component is 110-130 ℃. Or the synthetic fiber filament is of a hollow section radial structure, namely the filament is of a hollow section, and the two components are radially arranged at intervals in the center; micropores are formed on the surfaces of the filaments; the micropores are communicated with the hollow cavity.

Optionally, the synthetic fiber filaments are crimped filaments.

The hydrophilic ultra-short fibers comprise plant pulp or cellulose fibers; the length is 2-18 mm; the official moisture regain is more than or equal to 7 percent.

A preparation method of filament non-woven composite cloth comprises the following steps:

(1) preparation of filament web: firstly, melting polymer slices, spinning the obtained polymer melt by a spinning device after filtering and metering, cooling and drafting the polymer melt in sequence after spinning, and deforming the obtained filament fibers by a deforming device (preferably a mechanical deforming device) to enable the straight filament fibers to be in a curling state; and then lapping is carried out to prepare a filament fiber net.

(2) Preparation of ultra-short fiber web: dispersing the ultra-short fibers in water for pulping, and processing by adopting one or more disc mills in the process of dispersing the ultra-short fibers; removing impurities and fiber clusters by using a slit filtering device; diluting the slurry, and then carrying out wet forming by a forming machine (preferably an inclined wire former), wherein the concentrations of the slurry before and after dilution are respectively 1-3 wt% and 0.2-0.4 wt%; after dewatering an ultra short web is formed.

(3) And (3) superposing and reinforcing the fiber web: prewetting the filament fiber web, and then carrying out pre-spunlace (30-60 bar) on the filament fiber web; then stacking the ultra-short fiber web onto the filament fiber web; carrying out spunlace impact on the front surface and the back surface of the superposed fiber web, specifically carrying out spunlace on one surface of the superposed fiber web by adopting flat-screen spunlace, and then carrying out spunlace on the other surface of the superposed fiber web by adopting round drum spunlace; and the spunlace pressure is 50-120 bar, so that the ultra-short fibers and the filament fibers are mutually entangled and reinforced.

(4) And removing redundant moisture in the superposed fiber web by adopting a vacuum suction mode, and finally drying by adopting a hot air penetration mode to prepare the filament non-woven composite cloth.

A filament nonwoven compound fabric production apparatus, as shown in fig. 2, comprising: the device comprises a spinning and web-forming unit, a wet-forming unit, a superposition conveying unit, a spunlace composite unit and a drying unit.

The spunlaid unit sequentially comprises a slicing bin 101, an extruder 102, a melt metering pump 103, a spinning device 104, a cooling device 105, a drafting device 106, a deforming device 107 and a lapping device 108 according to the working procedures.

The overlapping conveying unit comprises a net supporting curtain 301, a pre-wetting device 302 and a pre-spunlace device 303; the net supporting curtains are connected end to form a loop capable of circularly rotating; the output end of the lapping device is connected with the input end of the net supporting curtain; a prewetting device and a prehydro-entangled device are sequentially arranged on one side of the net supporting curtain according to the advancing direction of the net supporting curtain, and a vacuum suction device A304 and a vacuum suction device B305 are respectively arranged on the opposite sides of the prewetting device and the prehydro-entangled device.

The wet-laid unit comprises a slurry preparation system, an inclined wire former 201, a forming wire 202 and a dewatering device 203. The slurry preparation system comprises a dispersing device 204, a metering pump 208, a liquid storage device 205, a fan pump 206 and a slurry distributor 207 which are connected in sequence; and stirrers are arranged in the dispersing device and the liquid storage device. The forming nets are connected end to form a loop capable of circularly rotating, and the inclined net former and the dewatering device are sequentially arranged along the rotating direction of the forming nets; the input end of the inclined net former is connected with the output end of the slurry preparation system; the output section of the forming net is connected with a station on the net supporting curtain behind the pre-spunlace device, and the superposed fiber net is positioned between the forming net and the net supporting curtain.

The spunlace unit comprises a plurality of flat-screen spunlace heads 401, a round drum spunlace device 402 and a vacuum suction device C403 which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs are arranged above the net supporting curtain and positioned on the inner side of the forming net; a vacuum suction device C is arranged below the net supporting curtain corresponding to each flat net water stabs; the drum hydro-entangled device is behind the output end of the net supporting curtain. The circular drum spunlace device comprises a circular drum and a plurality of circular drum spunlace heads facing the circumferential surface of the circular drum.

The drying unit is positioned behind the circular drum spunlace device, and a vacuum suction device D404 is arranged in the drying unit.

Example 1

The superfine filament non-woven composite fabric has unit area weight of 50 g/square meter. As shown in fig. 1, comprising a polyester/polyamide bicomponent synthetic fiber filament and an ultra-short fiber aggregate. Wherein the mass proportion of the bicomponent synthetic fiber filament is 40 percent, and the proportion of the ultra-short fiber is 60 percent; as shown in fig. 6, the cross-sectional shape of the bicomponent synthetic fiber filament is a hollow radial type, and the surface of the filament is provided with micropores communicated with the hollow. The filament fineness is 3D; the two components of Polyester (PET) and Polyamide (PA) are arranged alternately, and the number of the arranged components is 16.

The Polyester (PET)/Polyamide (PA) bicomponent synthetic fiber filament is a crimped filament; the ultrashort fibers 2 are 50% wood pulp and 50% viscose ultrashort fibers; the viscose ultrashort fiber has the specification that: 1.2D 10 mm; the wood pulp and the viscose ultrashort fibers are distributed in the polyester/polyamide bi-component synthetic fiber filament; the ultra-short wood pulp and viscose fiber is intertwined with the polyester/polyamide bi-component synthetic fiber filament.

A method for preparing superfine filament non-woven composite fabric comprises the following steps:

(1) production of filament webs

Respectively feeding polyester and polyamide slices into a double-screw extruder, and enabling a polymer melt to pass through a melt filter and a melt metering pump, and then to enter a quenching chamber after being sprayed out by a spinneret plate on a spinning device; then the straight filaments are changed into a curled state through a high-speed air flow drafting air channel and a mechanical deformation device; then, the filament fiber net is laid on a net supporting curtain through a lapping device to form the filament fiber net with the fineness of 3D;

(2) preparation of ultra-short fiber webs

Respectively feeding wood pulp and viscose ultrashort fibers into a pulping device, dispersing the ultrashort fibers in water, and removing impurities and fiber clusters in the pulp by using a slit filtering device; processing by adopting two disc grinding processes in the wood pulp disintegrating and dispersing process; feeding the diluted slurry into an inclined wire former through a fan pump, and dehydrating on the inclined wire former to form an ultra-short fiber net;

(3) web lamination and reinforcement

Prewetting a polyester/polyamide filament fiber net on a net supporting curtain, and then impacting by adopting high-pressure water flow to carry out prespunlace (the prespunlace pressure is 60 bar) on the filament fiber net so as to open the filament fiber net into 16 superfine fibers; then stacking the ultra-short fiber web onto the filament fiber web; sending the superposed fiber web into a spunlace system, firstly carrying out spunlace on the front surface of the superposed fiber web by adopting three flat-web spunlace heads (the spunlace pressure is 55bar, 60bar and 70bar in sequence), and then carrying out spunlace on the back surface of the superposed fiber web by adopting two round-drum spunlace heads (the spunlace pressure is 75bar and 100bar in sequence), so that the ultra-short fibers and the ultra-long fibers are mutually entangled and reinforced;

(4) and (3) removing redundant moisture in the laminated fiber net by using a vacuum suction device, and then, penetrating the laminated fiber net through hot air, drying and coiling to prepare the 50 g/square meter ultrafine filament non-woven composite fabric.

An apparatus for producing ultra-fine filament non-woven composite fabric, as shown in fig. 2, comprises: the device comprises a spinning and web-forming unit, a superposition conveying unit, a wet-forming unit, a spunlace composite unit and a drying unit.

Wherein:

the spunlaid unit comprises two slicing bins 101, an extruder 102, a melt metering pump 103, a spinning device 104, a cooling device 105, a drafting device 106, a deforming device 107 and a lapping device 108 which are connected in parallel in sequence.

The superposition conveying unit comprises a net supporting curtain 301, a pre-wetting device 302, a pre-spunlace device 303, a vacuum suction device and six guide rollers; the net supporting curtain 301 is arranged on the frame to form a loop capable of circularly rotating; a prewetting device 302 and a prespunlace device 303 are sequentially arranged on one side of the net supporting curtain 301 according to the advancing direction of the net supporting curtain, and a vacuum suction device A and a vacuum suction device B are correspondingly arranged on the other side of the forming net.

The wet-laid unit comprises a slurry preparation system, a frame, an inclined wire former 201, a forming wire 202 and a dewatering device 203; the inclined wire former and the dewatering device are sequentially arranged on the frame along the rotation direction of the forming wire; the input end of the inclined net former is connected with the output end of the slurry preparation system; the forming net is arranged behind the pre-spunlace device on the net supporting curtain and is positioned above the filament fiber net; the laminated fiber net is positioned between the forming net and the net supporting curtain.

The spunlace unit comprises 3 flat screen spunlace heads 401, a round drum spunlace device 402, a vacuum suction device and 2 cloth guide rollers which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs 401 are arranged above the net supporting curtain 301 and are positioned on the inner side of the forming net 202; and 3 vacuum suction devices C403 are arranged below the net supporting curtain corresponding to each flat net water stabs head 401.

The slurry preparation system comprises a dispersing device 204, a liquid storage device 205, a fan pump 206 and a slurry distributor 207; a metering pump 208 is arranged between the dispersing device 204 and the liquid storage device 205; stirrers are arranged in the dispersing device 204 and the liquid storage device 205; the drum hydroentangling mechanism 402 includes a drum and 2 drum hydroentangling heads facing the circumferential surface of the drum.

Example 2

A bicomponent filament nonwoven composite fabric having a mass per unit area of 40 grams per square meter. As shown in fig. 1, comprising a continuous bicomponent synthetic fiber filament and an ultra-short fiber aggregate; wherein the mass proportion of the bicomponent synthetic fiber filament is 50 percent, and the proportion of the ultra-short fiber is 50 percent;

the bicomponent synthetic fiber filament is a crimped filament with a fineness of 1.2D, as shown in FIG. 5, the cross-sectional shape thereof is hexagonal, and the two components are Polyethylene (PE) and polypropylene (PP) components; the two components are arranged in parallel; wherein the Polyethylene (PE) component has a melting point of 120 ℃.

The ultra-short fiber 2 is Lyocell (Lyocell, tencel) ultra-short fiber; the specification of the Lyocell ultra-short fiber is 1.2D × 8 mm; the lyocell ultra-short fibers are distributed in the bicomponent synthetic fiber filaments; the lyocell ultra-short fibers are bonded and fixed on the bicomponent synthetic fiber filament.

A preparation method of a bicomponent filament non-woven compound fabric comprises the following steps:

(1) production of filament webs

Firstly, feeding polypropylene (PP) and Polyethylene (PE) slices into a double-screw extruder, and enabling a polymer melt to pass through a melt filter and a melt metering pump, and then to enter a quenching chamber after being sprayed out by a spinneret plate on a spinning device; then the straight filaments are changed into a curled state through a high-speed air flow drafting air channel and a mechanical deformation device; then, the filament fiber net is laid on a net supporting curtain through a lapping device to prepare a bicomponent filament fiber net;

(2) preparation of ultra-short fiber webs

Sending the lyocell ultra-short fiber into a pulping device, dispersing the ultra-short fiber in water, and removing impurities and fiber clusters in the pulp by adopting a slit filtering device; feeding the diluted slurry into an inclined wire former through a fan pump, and dehydrating on the inclined wire former to form an ultra-short fiber net;

(3) web lamination and reinforcement

Pre-wetting a bicomponent filament fiber net on a net supporting curtain, and then impacting by adopting high-pressure water flow to pre-spunlace the filament fiber net (the pre-spunlace pressure is 40 bar); then stacking the ultra-short fiber web onto the filament fiber web; sending the superposed fiber web into a spunlace system, firstly carrying out spunlace on the front surface of the superposed fiber web by adopting three flat-web spunlace heads (the spunlace pressure is 55bar, 65bar and 75bar in sequence), and then carrying out spunlace on the back surface of the superposed fiber web by adopting two round-drum spunlace heads (the spunlace pressure is 70bar and 110bar in sequence), so that the lyocell ultra-short fibers and the bi-component filament fibers are mutually entangled and reinforced;

(4) removing excessive water in the laminated fiber net by using a vacuum suction device, penetrating the laminated fiber net through a hot air drying device, melting PE (polyethylene) components in the laminated fiber net when the drying temperature reaches above 120 ℃, bonding tencel ultra-short fibers on the PE components of the filament fibers, and coiling to prepare 40 g/square meter bi-component filament non-woven composite cloth.

A bicomponent filament nonwoven composite fabric production apparatus, as shown in fig. 2, comprising: the device comprises a spinning and web-forming unit, a superposition conveying unit, a wet-forming unit, a spunlace composite unit and a drying unit.

Wherein:

The superposition conveying unit comprises a net supporting curtain 301, a pre-wetting device 302, a pre-spunlace device 303, a vacuum suction device and six guide rollers; the net supporting curtain 301 is arranged on the frame to form a loop capable of circularly rotating; a prewetting device 302 and a prespunlace device 303 are sequentially arranged on one side of the net supporting curtain 301 according to the advancing direction of the net supporting curtain, and a plurality of vacuum suction devices A and a plurality of vacuum suction devices B are correspondingly arranged on the other side of the forming net.

The spunlace unit comprises 3 flat-screen spunlace heads 401, a round drum spunlace device 402, a vacuum suction device and two cloth guide rollers which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs 401 are arranged above the net supporting curtain 301 and are positioned on the inner side of the forming net 202; and 3 vacuum suction devices C403 are arranged below the net supporting curtain corresponding to each flat net water stabs head 401.

Example 3

The polypropylene filament non-woven composite fabric has a mass per unit area of 45 g/square meter. As shown in fig. 1, comprising continuous polypropylene (PP) filaments and ultra-short fiber assemblies; wherein, the mass ratio of the polypropylene (PP) filament is 60 percent, and the ratio of the ultra-short fiber is 40 percent. As shown in fig. 4, the polypropylene (PP) filament has a hollow cross-section and a microporous structure on the surface thereof, and the micropores on the surface of the filament are communicated with the hollow space. The polypropylene filaments are crimped filaments, and the fineness of the crimped filaments is 1.5D; the ultrashort fibers are wood pulp fibers; the wood pulp fibers are distributed in the polypropylene filaments; the wood pulp fibers are intertwined with the polypropylene filaments.

A preparation method of a polypropylene filament non-woven composite fabric comprises the following steps:

(1) production of filament webs

Firstly, feeding polypropylene slices into a screw extruder, and spraying a polymer melt through a melt filter and a melt metering pump and a spinneret plate on a spinning device into a quench chamber; then the straight filaments are changed into a curled state through a high-speed air flow drafting air channel and a mechanical deformation device; then, the polypropylene filament fibers are laid on a net supporting curtain through a lapping device to prepare a polypropylene filament fiber net;

(2) preparation of ultra-short fiber webs

Sending the wood pulp into a pulping device, so that the wood pulp fiber is broken and dispersed in water; processing by adopting three disc grinding processes; feeding the diluted pulp into an inclined wire former through a fan pump, and dehydrating on the inclined wire former to form a wood pulp fiber net;

(3) web lamination and reinforcement

Pre-wetting a polypropylene filament fiber net on a net supporting curtain, and then impacting by adopting high-pressure water flow to pre-spunlace the polypropylene filament fiber net (the pre-spunlace pressure is 30 bar); then stacking the ultra-short fiber web onto the filament fiber web; sending the superposed fiber web into a spunlace system, firstly carrying out spunlace on one surface of the superposed fiber web by adopting flat-web spunlace, and then carrying out spunlace on the other surface of the superposed fiber web by adopting round-drum spunlace, wherein the spunlace pressure is 50-120 bar, so that the ultra-short fibers and the long fibers are mutually entangled and reinforced;

(4) and (3) removing redundant moisture in the laminated fiber net by using a vacuum suction device, and then, penetrating the laminated fiber net through hot air, drying and coiling to prepare the 45 g/square meter polypropylene filament non-woven composite fabric.

A polypropylene filament nonwoven compound fabric production device, as shown in fig. 2, comprising: the device comprises a spinning and web-forming unit, a superposition conveying unit, a wet-forming unit, a spunlace composite unit and a drying unit.

Wherein:

The superposition conveying unit comprises a net supporting curtain 301, a pre-wetting device 302, a pre-spunlace device 303, a vacuum suction device and 6 guide rollers; the net supporting curtain 301 is arranged on the frame to form a loop capable of circularly rotating; a prewetting device 302 and a prespunlace device 303 are sequentially arranged on one side of the net supporting curtain 301 according to the advancing direction of the net supporting curtain, and a plurality of vacuum suction devices A and a plurality of vacuum suction devices B are correspondingly arranged on the other side of the forming net.

The wet-laid unit comprises a slurry preparation system, a frame, an inclined wire former 201, a forming wire 202 and a dewatering device 203; the inclined wire former and the dewatering device are sequentially arranged on the frame along the rotation direction of the forming wire; the input end of the inclined net former is connected with the output end of the slurry preparation system; the forming net is arranged behind the pre-spunlace device on the net supporting curtain and is positioned above the filament fiber net; the superposed fiber web is positioned between the forming net and the net supporting curtain;

the spunlace unit comprises 3 flat-screen spunlace heads 401, a round drum spunlace device 402, a vacuum suction device and 2 cloth guide rollers which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs 401 are arranged above the net supporting curtain 301 and are positioned on the inner side of the forming net 202; and 3 vacuum suction devices C403 are arranged below the net supporting curtain corresponding to each flat net water stabs head 401.

Example 4

The difference between this example and example 3 is:

the polylactic acid filament non-woven composite fabric has a mass per unit area of 60 g/square meter. As shown in fig. 1, comprising a continuous polylactic acid (PLA) filament and an ultra-short fiber aggregate; wherein the mass ratio of the polylactic acid (PLA) filament is 55 percent, and the mass ratio of the ultrashort fiber is 45 percent.

The polylactic acid filament is a crimped filament, as shown in fig. 3, the cross section of the filament fiber is C-shaped, and the fineness of the filament fiber is 1.2D; the ultrashort fibers are wood pulp fibers; the wood pulp fibers are distributed in the polylactic acid filaments; the wood pulp fibers are intertwined with the polylactic acid filaments.

Example 5

The difference between this example and example 3 is:

the polyamide filament non-woven composite fabric has a mass per unit area of 70 g/square meter. As shown in fig. 1, comprising continuous Polyamide (PA) filaments and ultra-short fiber assemblies; wherein, the mass proportion of the Polyamide (PA) filament is 50 percent, and the proportion of the ultra-short fiber is 50 percent.

The polyamide filament is a crimped filament, as shown in figure 4, the cross section of the filament is hollow, and micropores communicated with the hollow are distributed on the surface of the filament; the fineness was 1.1D. The ultra-short fiber is bamboo pulp fiber with the specification of 1.2D 12 mm. The bamboo pulp fibers are distributed in the polyamide filaments; the bamboo pulp fibers and the polyamide filaments are intertwined with each other.

Example 6

The difference between this example and example 2 is:

the polyester filament non-woven composite fabric has a mass per unit area of 45 g/square meter. As shown in fig. 1, comprising a continuous bicomponent Polyester (PET) filament and an ultra-short fiber aggregate; wherein, the mass ratio of the bicomponent Polyester (PET) filament is 60 percent, and the ratio of the ultra-short fiber is 40 percent.

The bicomponent Polyester (PET) filaments are crimped filaments, the fineness of which is 1.5D, as shown in fig. 5, the cross-sectional shape is hexagonal, the two components are a low-melting-point polyester component and a conventional polyester component, and the two components are arranged in parallel; wherein the melting point of the low-melting polyester component is 115 ℃.

The ultrashort fiber 2 is viscose ultrashort fiber; the specification of the viscose ultrashort fibers is 1.2D × 10 mm; the viscose ultra-short fibers are distributed in the polyester filament; the viscose ultrashort fibers 2 are bonded and fixed on the polyester filament.

Example 7

The difference between this example and example 3 is:

the modified composite non-woven polyvinyl alcohol filament fabric has unit area weight of 50 g/square meter. As shown in fig. 1, comprising continuous modified polyvinyl alcohol (PVA) filaments and ultra-short fiber aggregates; wherein, the mass ratio of the polyvinyl alcohol (PVA) filament is 40 percent, and the ratio of the ultra-short fiber is 60 percent. The modified polyvinyl alcohol (PVA) filaments are protein modified polyvinyl alcohol, wherein the content of the PVA is 70%, and the content of the soybean protein is 30%.

The modified polyvinyl alcohol filament is a crimped filament, as shown in figure 3, the cross section of the filament fiber is C-shaped, and the fineness of the filament fiber is 1.5D; the ultra-short fiber is Lyocell (Lyocell, tencel) ultra-short fiber with the specification of 1.2D × 8 mm; the lyocell ultra-short fibers are distributed in modified polyvinyl alcohol (PVA) filaments; the lyocell ultra-short fibers and the modified polyvinyl alcohol filaments are intertwined with each other.

The raw materials and the equipment used in the utility model are common raw materials and equipment in the field if no special description is provided; the methods used in the present invention are conventional methods in the art unless otherwise specified.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims

1. A filament nonwoven composite fabric comprising an aggregate of filament fibers (1) and ultra-short fibers (2), characterized in that: the filament fibers are synthetic fiber filaments; the ultrashort fibers are hydrophilic ultrashort fibers; the hydrophilic ultrashort fibers are distributed in the synthetic fiber filament, and the hydrophilic ultrashort fibers and the synthetic fiber filament are mutually entangled and/or the hydrophilic ultrashort fibers are adhered and fixed on the synthetic fiber filament.

2. The filament nonwoven composite fabric of claim 1, wherein: the synthetic fiber filaments are single-component filaments or bicomponent filaments; wherein:

the single-component filament is of a C-shaped section or hollow section surface with a micropore structure; the micropores are communicated with the hollow cavity;

the bicomponent filament adopts a parallel structure with special-shaped cross section and different melting points, or adopts a radial structure with hollow cross section.

3. A filament nonwoven composite fabric according to claim 2, wherein:

the melting point of the component with the lower melting point in the special-shaped cross section parallel structure is 110-130 ℃;

the surface of the hollow section radiation type structure is provided with micropores; the micropores are communicated with the hollow cavity.

4. A filament nonwoven composite fabric according to claim 2, wherein: the synthetic fiber filaments are crimped filaments.

5. The filament nonwoven composite fabric of claim 1, wherein: the hydrophilic ultrashort fibers are plant pulp or cellulose fibers.

6. The filament nonwoven composite fabric of claim 5, wherein:

the length of the hydrophilic ultrashort fibers is 2-18 mm; and/or

The official moisture regain of the hydrophilic ultrashort fibers is more than or equal to 7 percent.

7. An apparatus for producing a filament nonwoven composite fabric according to any one of claims 1 to 6, wherein:

comprises a spinning and web-forming unit, a wet-forming unit, a superposition conveying unit, a spunlace composite unit and a drying unit;

the spinning and web-forming unit sequentially comprises a slicing bin (101), an extruder (102), a melt metering pump (103), a spinning device (104), a cooling device (105), a drafting device (106), a deforming device (107) and a web laying device (108) according to working procedures;

the overlapping conveying unit comprises a net supporting curtain (301), a pre-wetting device (302) and a pre-hydro-entangling device (303); the net supporting curtains are connected end to form a loop capable of circularly rotating; the output end of the lapping device is connected with the input end of the net supporting curtain; a pre-wetting device and a pre-spunlace device are sequentially arranged on one side of the net supporting curtain according to the advancing direction of the net supporting curtain, and a vacuum suction device A (304) and a vacuum suction device B (305) are respectively arranged on the opposite sides of the pre-wetting device and the pre-spunlace device;

the wet-laid unit comprises a slurry preparation system, an inclined wire former (201), a forming wire (202) and a dewatering device (203); the forming nets are connected end to form a loop capable of circularly rotating, and the inclined net former and the dewatering device are sequentially arranged along the rotating direction of the forming nets; the input end of the inclined net former is connected with the output end of the slurry preparation system; the output section of the forming net is connected with a station behind the pre-spunlace device on the net supporting curtain;

the spunlace composite unit comprises a plurality of flat-screen spunlace heads (401), a round drum spunlace device (402) and a vacuum suction device C (403) which are arranged in front of and behind the process; the flat net spunlace head and the round drum spunlace device are used for respectively spunlacing different surfaces of the laminated fiber net; the flat net water stabs are arranged above the net supporting curtain and positioned on the inner side of the forming net; a vacuum suction device C is arranged below the net supporting curtain corresponding to each flat net water stabs; the drum spunlace device is positioned behind the output end of the net supporting curtain;

the drying unit is positioned behind the circular drum spunlace device, and a vacuum suction device D (404) is arranged in the drying unit.

8. The production apparatus according to claim 7, wherein: the slurry preparation system comprises a dispersing device (204), a metering pump (208), a liquid storage device (205), a fan pump (206) and a slurry distributor (207) which are connected in sequence.

9. The production apparatus according to claim 8, wherein: and stirrers are arranged in the dispersing device and the liquid storage device.

10. The production apparatus according to claim 8, wherein: the circular drum spunlace device comprises a circular drum and a plurality of circular drum spunlace heads facing the circumferential surface of the circular drum.