TW202225514A - Method for manufacturing fiber article - Google Patents

Abstract

This method for producing a fibrous article comprises: an addition step in which a plurality of resin pellets comprising a fibrillar polymer are added to a plurality of first fibers while conveying the first fibers; a first treatment step of applying an external force to the plurality of first fibers to which the plurality of resin particles have been added to reduce fiber gaps; and a second treatment step in which a second fiber having an outer diameter smaller than that of the first fiber and set to a value in the range of 30 nm to 1.0 [mu] m is formed from the plurality of resin particulates by mitigating an external force applied to the plurality of first fibers to which the plurality of resin particulates have been added, thereby forming a fiber composite including the first fiber and the second fiber.

Description

Manufacturing method of fibrous articles

The present invention relates to a manufacturing method of a fibrous article.

The fibrous article is used as, for example, a filter member for filtering impurities from a fluid, or an absorbent member such as a sanitary article. Patent Document 1 discloses a nonwoven fabric which is a fibrous article containing different kinds of fibers. In addition, this document discloses a production method in which various fibers are individually spun and conveyed, and a nonwoven fabric is produced by inserting the other fiber into a fiber flow of one of the fibers. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 6-116854

[The problem to be solved by the invention]

When manufacturing fibrous articles containing different types of fibers, for example, by combining fibers with different outer diameters, the functions possessed by each fiber can be exhibited, thereby improving the performance of the fibrous articles. However, it is sometimes difficult to efficiently manufacture such fibrous articles with high functions. This problem is particularly significant, for example, in the case of manufacturing fibrous articles containing fibers having extremely fine outer diameters.

Therefore, an object of the present invention is to efficiently manufacture a fluffy fibrous article having a high function when manufacturing a fibrous article in which fibers of different outer diameters are combined. [Technical means to solve the problem]

In order to solve the above-mentioned problems, a method for producing a fibrous article according to an aspect of the present invention includes: an attaching step of attaching a plurality of resin particles containing a polymer capable of fibrillation to a plurality of first fibers; a first treatment A step of applying an external force to the plurality of first fibers attached with the plurality of resin particles to narrow the fiber gap; and a second treatment step of relaxing the external force to remove the resin particles from the plurality of resin particles. The second fiber is formed into a fiber composite comprising the first fiber and the second fiber, and the outer diameter of the second fiber is set to be smaller than the first fiber and within the range of 30 nm or more and 1.0 μm or less. value.

According to the above-mentioned method, by performing the above-mentioned steps, a fluffy fibrous article can be produced including the second fibers having an extremely fine size and the first fibers having an outer diameter larger than that of the second fibers, and the outer diameter of the second fibers is set to 30 nm. The value in the range of more than 1.0 μm or less. In addition, since the second fibers are combined with the first fibers, and the second fibers are supported by the first fibers, it is possible to manufacture a fibrous article that is more bulky than when the fibrous article is manufactured by using only the second fibers. Furthermore, it is possible to manufacture a highly functional fibrous article which can exhibit the function of the second fiber for a long period of time. Furthermore, for example, by dispersing a plurality of resin particles adhering to the first fibers to form the second fibers, the second fibers can be uniformly dispersed and arranged in the fibrous article. Thereby, fibrous articles of uniform quality can be produced.

Moreover, by carrying out each of the above-mentioned steps, for example, the above-mentioned fibrous article can be efficiently and continuously produced by a single conveying device. Thus, the manufacturing process can be simplified, and the manufacturing cost of the fibrous article can be reduced. As a result, a fluffy fibrous article having a high function can be produced efficiently.

In the first treatment step, an external force may be applied to shrink the fibers by applying an external force to the plurality of first fibers to which the plurality of resin particulates adhered while heating the plurality of first fibers and the plurality of resin particulates. gap. Thereby, the 2nd fiber can be formed efficiently.

You may further have the process of processing the said some 1st fiber into a sheet shape. Thereby, the sheet-like fibrous article containing the 1st fiber and the 2nd fiber can be manufactured efficiently.

In the said processing step, a nonwoven fabric can be formed by the said several 1st fiber. Thereby, the fibrous article containing the 1st fiber and the 2nd fiber and using a nonwoven fabric can be manufactured efficiently.

In the above-mentioned first treatment step, the above-mentioned external force can be imparted to the above-mentioned first fibers to which the above-mentioned plural resin particulates are adhered by squeezing the above-mentioned plural first fibers with a pair of nip rolls. Thereby, in the first treatment step, an external force can be efficiently applied to the first fibers.

In the first treatment step, the plurality of first fibers and the plurality of resin particles may be heated by the pair of heated nip rolls. Thereby, the nip roll can be used also as a heating device for heating the plurality of first fibers and the above-mentioned plurality of resin pellets. Thereby, the simplification of a manufacturing apparatus can be aimed at.

Alternatively, in the first treatment step, the external force may be imparted to the first fibers to which the plurality of resin particulates adhered by pressing the plurality of first fibers with a pressing device. Moreover, in the said 1st processing process, the said several 1st fiber and the said several resin particulate matter may be heated by the said heated pressurizing apparatus.

In the first treatment step, an external force may be applied to shrink the fibers by applying an external force to the plurality of first fibers to which the plurality of resin particulates adhered while heating the plurality of first fibers and the plurality of resin particulates. In the gap, the heating temperature of the plurality of first fibers and the plurality of resin pellets in the first treatment step is set to a temperature equal to or higher than the glass transition temperature of the first fibers. Further, in the first treatment step, an external force may be applied to shrink the plurality of first fibers to which the plurality of resin particles are attached while heating the plurality of first fibers and the plurality of resin particles. In the said fiber gap, the heating temperature of the said plurality of first fibers and the said plurality of resin pellets in the said 1st treatment process shall be the temperature in the range of 50 degreeC or more and 200 degrees C or less.

In the said attachment process, the dispersion liquid which disperse|distributed the said some resin particulate matter can be used. When a dispersion liquid is used, a plurality of resin particulates can be easily adhered to a wide range on the surface of the first fiber due to the fluidity of the dispersion liquid.

As the dispersion liquid, an aqueous dispersion liquid obtained by dispersing the above-mentioned plural resin particles in water can be used. Thereby, the dispersion liquid can be produced relatively inexpensively. Also, the dispersion liquid can be easily handled.

In the above-mentioned attachment step, the above-mentioned dispersion liquid detached from the above-mentioned first fibers in the above-mentioned first treatment step can be reused. Thereby, the manufacturing cost of the fibrous article can be more easily reduced.

In the said 1st processing process, the said external force set to the value of 0.05 MPa or more may be given to the said several 1st fiber to which the said several resin particulate matter adhered. Thereby, sufficient said external force can be given to a some resin granular material, and it becomes easy to form a 2nd fiber.

In the above-mentioned attachment step, the above-mentioned plural resin particulates having a layered structure can be used. Thereby, in the second treatment step, the second fibers can be easily formed from a plurality of resin pellets.

In the second treatment step, the weight ratio W1/W2 of the total weight W1 of the first fibers that can be formed and the total weight W2 of the second fibers and the remaining resin particles is set to 3.00 or more and 200.00. The above-mentioned fiber composite with a value in the following range. Thereby, the 2nd fiber can be stably carried by the 1st fiber, and the function of the 2nd fiber can be exhibited easily.

In the said attachment process, the said 1st fiber whose outer diameter is set to the value in the range of 5 micrometers or more and 50 micrometers or less can be used. Thereby, the degree of freedom of design of the fiber article can be improved.

In the said attachment process, the said 1st fiber containing at least one of rayon, polypropylene, polyethylene terephthalate, polyethylene, and cellulose acetate can be used. Moreover, in the said attachment process, the said resin granular material containing at least one of polytetrafluoroethylene, polypropylene, polyethylene, and polyamide can be used.

According to the above method, a fibrous article containing the first fibers and the second fibers can be efficiently produced. Moreover, by combining the 1st fiber and the 2nd fiber which respectively contain a specific material, each function of a 1st fiber and a 2nd fiber can be exhibited easily. [Effect of invention]

According to the various aspects of the present invention, when producing a fibrous article in which fibers of different outer diameters are combined, a fluffy fibrous article having a high function can be efficiently produced.

Hereinafter, each embodiment will be described with reference to the drawings. (first embodiment) The manufacturing method of the fibrous article of 1st Embodiment has the following adhesion|attachment process, 1st process process, and 2nd process process. In the attaching step, a plurality of resin particulates containing a polymer capable of being fibrillated are attached to a plurality of first fibers. In the first treatment step, an external force is applied to the plurality of first fibers to which the plurality of resin particulates are adhered to narrow the fiber gap. In the second treatment step, the second fiber is formed from the plurality of resin particles by relaxing the external force, and the outer diameter of the second fiber is set to be smaller than the first fiber and set to 30 nm or more and 1.0 μm The following range of values. Moreover, in a 2nd processing process, the fiber composite containing the said 1st fiber and the said 2nd fiber is formed. In the first treatment step of the present embodiment, an external force is applied to shrink the plurality of first fibers to which the plurality of resin particulates are adhered while heating the plurality of first fibers and the plurality of resin particulates. fiber gap. In order to carry out the first and second processing steps, in this embodiment, as an example, a pair of heated nip rolls is used. The tow tape manufacturing apparatus and the fiber article manufacturing apparatus used for this manufacturing method are demonstrated.

[Tow Tape Manufacturing Device] FIG. 1 is an overall view of a tow tape manufacturing apparatus 1 according to the first embodiment. The tow ribbon manufacturing apparatus 1 shown in FIG. 1 spins the filament 61 as the first fiber by the dry spinning method. Moreover, the tow tape manufacturing apparatus 1 manufactures the yarn 62 , the end 63 , and the tow tape 64 from the plurality of filaments 61 . The raw material of the filament 61 can be appropriately selected. As an example, the filament 61 contains at least one of rayon, polypropylene, polyethylene terephthalate, polyethylene, and cellulose acetate. The filament 61 of this embodiment contains cellulose acetate.

The tow tape manufacturing apparatus 1 includes a mixing apparatus 2 , a filtering apparatus 3 , a spinning unit 4 , a dispersion liquid adhering unit 5 , an oil agent adhering unit 6 , a guide roll R1 , a pair of conveying rolls 7 , a crimping apparatus 10 , and a drying apparatus 11 . As an example of the spinning dope 60 used in the tow tape manufacturing apparatus 1, it is prepared by dissolving flakes, such as cellulose diacetate, in an organic solvent. When the tow tape manufacturing apparatus 1 is driven, the spinning dope 60 is mixed by the mixing apparatus 2 and then filtered by the filtering apparatus 3 . The spinning dope 60 that has passed through the filter device 3 is discharged from the plurality of spinning holes 15 a of the spinning head 15 provided in the spinning drum 14 of the spinning unit 4 .

The peripheral shape of the spinning hole 15a is formed into a predetermined shape (as an example, it is formed into a circular shape). The diameter of the spinning hole 15a is appropriately set according to, for example, the single fineness (FD) of the filament 61 after production. The spinning dope 60 discharged from each spinning hole 15a is dried by evaporating the organic solvent by heating with hot air supplied into the spinning drum 14 from a drying unit not shown. Thereby, a plurality of first fibers (filaments 61 ) are formed. In addition, the spinning method of the filament 61 is not limited, and a method other than the dry spinning method (for example, a melt spinning method, a wet spinning method) may be used. The spinning method of the filaments 61 may be any method as long as the tow tape 64 can be obtained appropriately.

As shown in FIG. 1 , the dispersion liquid is attached to the plurality of filaments 61 that have passed through one spinning drum 14 by the dispersion liquid attaching unit 5 . The dispersion liquid attaching unit 5 attaches the dispersion liquid containing the resin particulates 66 to the filaments 61 . As an example, the dispersion liquid adhering unit 5 has a storage part which stores the dispersion liquid; and an attachment roller which is pivotally supported so that the dispersion liquid in the storage part adheres to the peripheral surface and adheres to the filaments 61 . The dispersion liquid of the present embodiment is an aqueous dispersion liquid obtained by dispersing a plurality of resin particles 66 in water. The dispersion liquid may contain liquids other than water. Thereby, the dispersion liquid can be produced relatively inexpensively. Also, the dispersion liquid can be easily handled.

The resin pellets 66 are internally clad with a layered structure. The layered structure mentioned here refers to a structure in which polymer chains of the resin constituting the resin pellets 66 are connected and folded. Specifically, the layered structure contained in the resin pellets 66 is a microfiber formed by connecting the polymer chains in a band shape with millions of units. The fine fibers are folded and accommodated inside the resin pellets 66 .

The resin pellets 66 are primary particles. The plurality of resin particulates 66 constitute secondary particles by bonding with each other. When an external force is applied to the secondary particles (in other words, the two bonded resin pellets 66 ) to separate the resin pellets 66 from each other, the fine fibers are drawn out from the resin pellets 66 , and the resin pellets 66 are separated from each other. 66 forms resin fibers 66a. In the dispersion liquid of the present embodiment, primary particles composed of a plurality of resin particulates 66 are contained in a solvent in a dispersed state. The dispersion liquid attaching unit 5 attaches the dispersion liquid to the filaments 61 , whereby a plurality of resin particles 66 are dispersed and attached to the surfaces of the filaments 61 . As an example, a plurality of secondary particles of the resin particulates 66 are attached to the surface of the filament 61 .

As described below, an external force is applied to the plurality of filaments 61 to which the plurality of resin particles 66 are adhered in this manner to narrow the fiber gap, thereby causing the plurality of resin particles to adhere to the surfaces of the different filaments 61. 66 follow each other. Furthermore, by relaxing the above-mentioned external force applied to the plurality of filaments 61, the following resin pellets 66 are separated from each other. Thereby, resin fibers 66a are formed (see FIGS. 2 , 4 , and 5 ).

The resin particulates 66 of the present embodiment may be produced, for example, by a polymerization reaction and have a layer-like structure inside. As an example, the resin particulate material 66 contains at least one of PTFE (polytetrafluoroethylene), polypropylene, polyethylene, and polyamide. The resin granular material 66 of this embodiment contains PTFE.

The average particle diameter of the resin particulates 66 is set to a value in the range of 100 nm or more and 100 μm or less (for example, about 300 nm). As an example, the average particle diameter is more preferably a value within a range of 200 nm or more and 700 nm or less, and more preferably a value within a range of 250 nm or more and 400 nm or less. In addition, the average particle diameter means the median diameter (cumulative 50% particle diameter (D50)) calculated from the measurement result of a dynamic light scattering method. As an example, the resin pellets 66 are formed by paste extrusion molding.

The plurality of filaments 61 that have passed through the dispersion liquid adhering unit 5 are adhered with fiber oil by the oiling agent adhering unit 6 . The plurality of filaments 61 that have passed through the finish adhering unit 6 are guided by the plurality of guide rollers R1 serving as guide members, and are bundled into yarns 62 . The yarn 62 is conveyed in a predetermined conveying direction P. The plurality of yarns 62 are appropriately accumulated or layered while being conveyed in the conveying direction P. Thereby, the plurality of yarns 62 are gathered together to form a single yarn (tow) 63 which is a flat aggregate of the yarns 62 . The single yarn 63 is obtained by gathering a plurality of yarns 62 and setting it to a predetermined total fineness (TD). The single yarn 63 is conveyed by the pair of conveying rollers 7 having a pair of conveying rollers 8 and 9 , and is then conveyed to the crimping device 10 .

The crimping device 10 crimps the filaments 61 . As an example, the crimping apparatus 10 has a pair of nip rolls N1 and N2 and the stuffing box 18 . The rotation axes of the pair of nip rolls N1 and N2 are arranged parallel to each other. The pair of nip rolls N1 and N2 presses the single yarn 63 by the peripheral surfaces of each other.

The stuffing box 18 is arranged behind the conveyance direction P rather than the pair of nip rolls N1 and N2. The stuffing box 18 has a pair of plate materials C1 and C2 having a plate surface extending in the conveying direction P, and the pressing member 12 . The pair of plate materials C1 and C2 face each other with a gap G between them, and the gap G is arranged so that the gap G decreases from the front of the stuffing box 18 in the conveyance direction P toward the rear. In the gap G, the single yarn 63 (plurality of filaments 61 ) that has passed through the pair of nip rolls N1 and N2 is conveyed.

An example of the pressing member 12 is a plate, which extends in a direction perpendicular to the conveying direction P along the plate surface of the plate C1. The forward end of the pressing member 12 in the conveying direction P is rotatably supported by the plate material C1 around an axis Q extending in a direction perpendicular to the conveying direction P along the plate surface of the plate C1. The pressing member 12 is pressed toward the plate surface of the plate material C2 to press the single yarn 63 conveyed between the pair of plate materials C1 and C2.

The single yarn 63 is squeezed by the pair of nip rolls N1 and N2 between the pair of nip rolls N1 and N2. Thereafter, the individual yarns 63 are pressed into the interior of the stuffing box 18 . The single yarn 63 is zigzagly conveyed between the plate surfaces of the plates C1 and C2, and is pressed toward the plate surface of the plate C2 by the pressing member 12. The single yarn 63 is pressed into the stuffing box 18 by a pair of nip rollers N1 and N2 with a force greater than the force received by the single yarn 63 from the sheet material C1 and C2 and the pressing member 12 , thereby imparting a force to the single yarn 63 . crimp. By passing the single yarn 63 through the crimping device 10, the tow belt 64 processed into a sheet is formed.

As an example, in the crimping device 10, in order to properly crimp the filaments 61 and reduce the amount of the dispersion liquid falling off the filaments 61, the nip pressure of the pair of nip rolls N1, N2 is set to a value within an appropriate pressure range . The tow tape 64 that has passed through the crimping device 10 is dried by the drying device 11 .

FIG. 2 is a schematic cross-sectional view of a tow ribbon 64 manufactured by the tow ribbon manufacturing apparatus 1 of FIG. 1 . As shown in FIG. 2 , the tow band 64 has a plurality of crimped filaments 61 and a plurality of resin particles 66 dispersed inside the tow band 64 and supported by the filaments 61 . Fiber gaps exist between the plurality of filaments 61 . The surfaces of the filaments 61 are partially covered with a plurality of resin particles 66 . As an example, the plurality of resin particulates 66 are carried by the filaments 61 in the state of secondary particles formed by bonding with each other. The tow band 64 is formed more fluffy by the crimped filaments 61 .

The TD and FD of the tow band 64 can be appropriately set. As an example, the FD of the tow tape 64 is set to a value in the range of 1.0 or more and 10.0 or less. For example, in order to maintain the appropriate strength of the filaments 61 and to appropriately secure the fiber gap, the FD of the tow tape 64 is more preferably set to a value in the range of 2.0 or more and 6.0 or less. As shown in FIG. 1 , in the present embodiment, the sheet-like tow tapes 64 that have passed through the drying device 11 are assembled, compressed and packed in the packing container 19 to form a bundle. The bale container 19 of FIG. 1 shows a cross-sectional structure.

[PTFE used as material of resin pellet 66] Next, the PTFE used as the material of the resin pellets 66 will be described. The PTFE is constituted as a polymer capable of being fibrillated. Such PTFE is, for example, high molecular weight PTFE obtained by emulsion polymerization or suspension polymerization of TFE (tetrafluoroethylene). The high molecular weight PTFE may be at least any one of modified PTFE and homogeneous PTFE.

The so-called modified PTFE includes TFE and monomers (modified monomers) other than TFE. The modified PTFE is generally modified uniformly by modifying monomers, modified in the initial stage or final stage of the polymerization reaction, and is not particularly limited. The modified PTFE contains a TFE unit based on TFE and a modified monomer unit based on a modified monomer.

In addition, the so-called modified monomer unit refers to a part of the molecular structure of modified PTFE, and is derived from the modified monomer. The so-called total monomer units come from all monomers in the molecular structure of modified PTFE. The reforming monomer is not particularly limited as long as it can be copolymerized with TFE.

The "high molecular weight" of the high molecular weight PTFE mentioned here refers to the following molecular weight: it is easy to be fibrillated when manufacturing the tow tape 64, and fibrils with long fiber length can be obtained, and the standard specific gravity (SSG) is 2.130 or more and 2.230 or less. The value in the range, the melt flow does not substantially occur due to the high melt viscosity. In addition, regarding the PTFE which can be fibrillated, international publication 2013/157647 can be referred, for example.

When the resin fiber 66a is formed from the resin pellets 66 containing PTFE, as an example, the elongation of the resin fiber 66a is improved by heating the resin pellets 66. When the resin fiber 66a has good extensibility, when the resin fiber 66a is formed from the resin pellets 66, the resin fiber 66a is less likely to be cut. Therefore, the expressiveness of the resin fiber 66a is improved.

[fabrication equipment for fabrics] FIG. 3 is an overall view of the fibrous article manufacturing apparatus 20 according to the first embodiment. The bale container 19 of FIG. 3 shows a cross-sectional structure. As shown in FIG. 3 , as an example, the fibrous product manufacturing apparatus 20 includes a gathering ring 21 , a first spreading unit 22 , a turn baffle 23 , a second spreading unit 24 , and a pre-tension roll ) pair 25 , the first fiber-spreading roll pair 26 , the second fiber-spreading roll pair 27 , the third fiber-spreading unit 28 , the heating nip roll pair 29 , the conveyance roll pair 30 , and the take-up roll 31 .

The gathering ring 21 and the deflecting baffle 23 guide the bundle-shaped tow band 64 lifted from the packing container 19 to the first fiber opening unit 22 side. The first fiber opening unit 22 , the second fiber opening unit 24 , and the third fiber opening unit 28 open the tow tape 64 in the width direction by gas (for example, pressurized air). The pretensioning roller pair 25 , the first fiber opening roller pair 26 , and the second fiber opening roller pair 27 apply tension to the tow belt 64 in the conveyance direction P. Open fiber.

The pair of pretensioning rollers 25 has a pair of rollers 32 and 33 which are arranged so as to face each other. The first pair of spreading rolls 26 has a pair of rolls 34 and 35 arranged to face each other on the circumferential surface. The second fiber-spreading roll pair 27 includes a pair of rolls 36 and 37 arranged to face each other on the circumferential surface. As an example, the peripheral surfaces of the rollers 34 to 37 are configured such that "grooves extending in the circumferential direction are formed so that the tow band 64 can be easily opened".

The pair of heating nip rolls 29 has one pair of rolls N3, N4 arranged to face each other in the circumferential surface. The heating nip roller pair 29 applies an external force to narrow the fiber gap while heating the plurality of filaments 61 and the plurality of resin particles 66 with respect to the plurality of filaments 61 to which the plurality of resin particles 66 are attached in the tow belt 64 .

The conveyance roller pair 30 has one pair of rollers 38 and 39 arranged to face each other on the circumferential surface. The conveyance roller pair 30 conveys the tow band 64 after passing through the heating nip roller pair 29 toward the take-up roller 31 side. The take-up roller 31 takes up the tow tape 64 that has passed through the conveyance roller pair 30 .

When the fiber product manufacturing apparatus 20 is driven, the tow tape 64 lifted from the packing container 19 is inserted into the gathering ring 21, and then fiber is opened in the width direction by the first fiber opening unit 22. After that, the tow band 64 is guided toward the second fiber spreading unit 24 by the deflector 23 .

Then, the tow tape 64 is further opened in the width direction by the second opening unit 24 . Then, the tow belt 64 is inserted between the rollers 32 and 33, between the rollers 34 and 35, and between the rollers 36 and 37 in this order. The tow belt 64 is in contact with the rollers 32 to 37 . The rotational speed of the pair of rollers 36 and 37 is faster than the rotational speed of the pair of rollers 34 and 35 . Thereby, the tow belt 64 is opened relatively bulky in the conveyance direction P and the width direction while being provided with tension in the conveyance direction P by the first fiber opening roller pair 26 and the second fiber opening roller pair 27 .

Here, FIG. 4 is a schematic cross-sectional view of the tow ribbon 64 after being thermocompressed by the pair of heating nip rolls 29 of FIG. 3 . FIG. 5 is a cross-sectional view of a fiber composite 67 (fiber article 65 ) manufactured by the fiber article manufacturing apparatus 20 of FIG. 3 . After passing through the second pair of opening rolls 27 , the tow ribbon 64 that has been opened is introduced to the nip point N5 of the pair of heating nip rolls 29 .

As shown in FIGS. 4 and 5 , when the tow band 64 passes through the pair of heating nip rolls 29, the plurality of filaments 61 and the plurality of resin pellets are heated with respect to the plurality of filaments 61 to which the plurality of resin pellets 66 are attached. The shape 66 provides a clamping pressure as an external force to narrow the fiber gap. Thereby, the fiber gaps of the plurality of filaments 61 are reduced, and the plurality of resin particles 66 attached to the filaments 61 adhere to each other to form higher-order particles of the resin particles 66 . After that, the filament 61 passes through the nip point N5, and the external force is relieved.

When the external force is relaxed, the resin pellets 66 are given tension, so that the resin pellets 66 adjoining each other between the different filaments 61 are separated from each other. Thereby, the fine fibers in the folded state in the resin pellets 66 are stretched, and the resin fibers 66a are formed so as to bridge between the plurality of different filaments 61 . As a result, a fiber composite 67 containing the filaments 61 and the resin fibers 66a is formed. In this way, in the present embodiment, by using the pair of heated nip rolls 29, the resin fibers 66a and the fiber composite 67 can be formed relatively easily.

In addition, in the present embodiment, the resin fibers 66a are formed using the pair of heating nip rolls 29, but the plurality of filaments 61 and the resin pellets 66 may be formed by heating the plurality of filaments 61 and the resin particles 66 using a heating device different from the pair of heating nip rolls 29. Resin fiber 66a. In addition, the above-mentioned external force may be applied to the plurality of filaments 61 using other than nip rolls. Therefore, for example, by heating the plurality of filaments 61 and the plurality of resin pellets 66, the plurality of resins are adhered from at least one of the first pair of spreading rolls 26 and the pair of second spreading rolls 27. The plurality of filaments 61 of the granular material 66 can also form the resin fibers 66a by applying a clamping pressure as the above-mentioned external force.

The outer diameter of the resin fibers 66a can be adjusted by, for example, the magnitude of the above-mentioned tension acting on the resin pellets 66 . For example, if the above-mentioned tension is increased, the outer diameter of the resin fibers 66a can be set small, and the length dimension of the resin fibers 66a can be set long. If the above-mentioned tension is reduced, the outer diameter of the resin fibers 66a can be set larger, and the length dimension of the resin fibers 66a can be set shorter. By such adjustment, in the present embodiment, the outer diameter of the resin fiber 66a can be set to a value in the range of 30 nm or more and 1.0 μm or less.

The fiber composite 67 that has passed through the pair of heating nip rolls 29 is transported by the pair of transport rolls 30 and taken up by the take-up roll 31 . The fiber article 65 is produced by cutting the fiber composite 67 into a predetermined size, for example. The resin fibers 66 a are intertwined with the filaments 61 inside the fiber article 65 and carried by the filaments 61 . Therefore, even when the resin fiber 66a is very thin compared to the filament 61, the resin fiber 66a can be supported by the filament 61 while preventing cutting of the resin fiber 66a. Thereby, the function which the resin fiber 66a has can be maintained for a long period of time. The resin fibers 66 a are arranged so as to be diffused to the entire interior of the tow band 64 . Furthermore, as the resin fibers 66a are formed, the resin particles 66 in the fibrous article 65 may shrink or disappear in some cases.

The fiber article 65 has a state of abundant fiber gaps inside, and is formed relatively fluffy by the plurality of filaments 61 after fiber opening. Therefore, the fibrous article 65 has, for example, a soft and good touch. As an example, the fibrous article 65 is in the form of a sheet. Furthermore, the fiber article 65 can be formed by overlapping and crimping a plurality of sheet-like fiber composites 67 . In this case, for example, the thickness dimension of the fiber article 65 can be easily designed by changing the number of sheets of the fiber composite 67 . In addition, the fiber article 65 may be formed by arranging a plurality of sheet-like fiber composites 67 in the width direction. In this case, for example, the width dimension of the fiber article 65 can be easily designed by adjusting the number of sheets of the fiber composite body 67 .

The value of the external force applied to the plurality of filaments 61 in order to form the resin fibers 66a can be appropriately set, and for example, a value of 0.05 MPa or more can be exemplified. When the fibrous article 65 is used as a filter member, the value of the external force imparted to the plurality of filaments 61 is preferably, for example, 0.10 Mpa or more in terms of obtaining good filtering performance. Furthermore, the upper limit value of the external force may be, for example, a value of several tens of MPa or more.

In addition, the heating temperature for heating the plurality of filaments 61 and the plurality of resin pellets 66 to form the resin fibers 66a can be appropriately set, for example, a temperature in the range of 50°C or higher and 200°C or lower can be exemplified. The heating temperature can be set based on, for example, the properties of the resin pellets 66 or the resin fibers 66a.

This heating temperature can also be set to the temperature more than the glass transition temperature (Tg) of the filament 61, for example. When the above-mentioned external force is applied to the filaments 61 by heating the plurality of filaments 61 and the resin pellets 66 at such a heating temperature, the plurality of filaments can be maintained to some extent even after the above-mentioned external force is relieved. 61 is compressed by the above external force. Thereby, the bulkiness of the fibrous article 65 can be easily set to an arbitrary thickness height. As an example, when the filaments 61 are cellulose acetate fibers, the glass transition temperature of the filaments 61 is, for example, 70°C at room temperature of 20°C and humidity of 65%. Thereby, by making the said heating temperature into 70 degreeC or more, for example, the sheet-like fibrous article 65 with a small bulkiness can be manufactured efficiently. In addition, the above-mentioned heating temperature may not reach the melting point of each material of the filament 61 and the resin pellet 66, or the decomposition temperature of each of the above-mentioned materials, for example.

As described above, the fibrous article 65 is manufactured by the manufacturing method using the tow tape manufacturing apparatus 1 and the fibrous article manufacturing apparatus 20 . This manufacturing method has an adhesion process, a 1st process process, and a 2nd process process.

The attaching step is a step of attaching a plurality of resin particles 66 containing a polymer capable of fibrillation to a plurality of filaments 61 . In the attaching step of the present embodiment, a dispersion liquid containing a plurality of resin particles 66 having an inner cladding structure and bonded to each other is attached to a plurality of filaments 61 . The first treatment step is a step of applying an external force to the plurality of filaments 61 to which the plurality of resin particles 66 are attached to narrow the fiber gap. Here, as an example, the first treatment step of the present embodiment is a step of heating the plurality of filaments 61 and the plurality of resin particles while heating the plurality of filaments 61 to which the plurality of resin particles 66 are attached. The 66 side gives external force to narrow the fiber gap.

Moreover, the manufacturing method of this embodiment further has the processing step of processing a plurality of filaments 61 into a sheet shape. Moreover, as an example, in a 1st processing process, the said external force is given to the filament 61 to which the some resin granular material 66 adheres by pressing the some filament 61 with a pair of nip rolls. Furthermore, as an example, the plurality of filaments 61 and the plurality of resin particulates 66 are heated by the heating nip roll pair 29 in the first treatment step.

Moreover, in the 1st processing process of this embodiment, as an example, the said external force set to the value of 0.05 MPa or more is applied to the plural filaments 61 to which the plural resin particulates 66 are adhered. As an example, the nip pressure is given by the pair of heated nip rolls 29 . In addition, in the present embodiment, as an example, the dispersion liquid separated from the filaments 61 in the first treatment step is recovered, and the recovered dispersion liquid is used in the adhesion step.

In addition, in the fiber composite 67, the weight ratio W1/W2 of the total weight W1 of the filaments 61 and the total weight W2 of the resin fibers 66a and the remaining resin pellets 66 can be appropriately set. In the second treatment step of the present embodiment, as an example, the fiber composite 67 is formed in which the weight ratio W1/W2 is set to a value in the range of 3.00 or more and 200.00 or less. Thereby, in the fiber article 65, the resin fiber 66a can be stably carried by the filament 61, and the function of the resin fiber 66a can be easily exhibited.

In addition, in the adhesion step, the filament 61 whose outer diameter is set to a value in the range of 5 μm or more and 50 μm or less is used. Thereby, the difference between the outer diameters of the filaments 61 and the resin fibers 66a can be increased, and the degree of freedom in designing the fiber article 65 can be improved.

Furthermore, by setting the weight ratio W1/W2 to a value within the above-mentioned range, the total volume V1 of the filaments 61 (first fibers), the resin fibers 66 a (second fibers), and the residual resin particles 66 The maximum value of the volume ratio V1/V2 of the total volume V2 is 124.0 or less. Thereby, the fiber gap can be appropriately secured in the fiber article 65, and the resin fiber 66a can be stably held by the filament 61, and the function of the resin fiber 66a can be easily exerted.

In addition, the length dimension of the filament 61 and the length dimension of the resin fiber 66a can be appropriately set. In the second processing step of the present embodiment, the fiber composite 67 in which the length dimension of the filaments 61 is longer than the length dimension of the resin fiber 66a is formed. Thereby, for example, the filament 61 can be used as the skeleton of the fiber article 65, and the resin fiber 66a can be supported on the filament 61, so that the function of the resin fiber 66a can be stably exhibited.

As described above, according to the manufacturing method of the present embodiment, by carrying out the above-mentioned steps, it is possible to manufacture the fluffy fibrous article 65 containing the outer diameter of which is set to a value in the range of 30 nm or more and 1.0 μm or less. The ultra-fine resin fibers 66a and the filaments 61 whose outer diameters are thicker than the resin fibers 66a. Furthermore, since the extremely fine resin fibers 66a are combined with the filaments 61, and the resin fibers 66a are supported by the filaments 61, the fibrous article 65 can be produced which is more bulky than when, for example, a fibrous article is produced by using only the resin fibers 66a. Furthermore, the fiber article 65 with high function which can exhibit the function of the resin fiber 66a for a long period of time can be manufactured. Also, for example, by forming the resin fibers 66 a with a plurality of resin particles 66 dispersed and adhered to the filaments 61 , the resin fibers 66 a can be uniformly dispersed and arranged in the fibrous article 65 . Thereby, the fibrous article 65 of uniform quality can be produced.

Moreover, by performing each of the above-mentioned steps, for example, the fibrous article 65 can be continuously manufactured efficiently by a single conveying device. Thus, the manufacturing process can be simplified, and the manufacturing cost of the fibrous article 65 can be reduced. As a result, the fluffy fibrous article 65 with high function can be produced efficiently. Moreover, according to this embodiment, the fibrous article 65 having both good bulkiness and porosity can be produced relatively simply and efficiently, which were difficult to achieve in the past. Furthermore, a bulky fibrous article 65 including ultrafine fibers having an outer diameter of 1.0 μm or less can be produced favorably, which has been difficult to achieve stable mass production in the past.

In addition, in the first processing step of the present embodiment, an external force is applied to the plurality of filaments 61 to which the plurality of resin particles 66 are adhered while heating the plurality of filaments 61 and the plurality of resin particles 66, so that the Reduce fiber gaps. Thereby, the resin fiber 66a can be formed efficiently. In addition, the manufacturing method of this embodiment has a processing step of processing a plurality of filaments 61 into a sheet shape. Thereby, the sheet-like fibrous article 65 containing the filaments 61 and the resin fibers 66a can be efficiently produced.

Moreover, in the first processing step of the present embodiment, as an example, the above-described external force is applied to the filaments 61 to which the plurality of resin particulates 66 are adhered by pressing the plurality of filaments 61 with the heating nip roll pair 29 . . Thereby, in the first processing step, an external force can be efficiently applied to the filaments 61 .

Moreover, in the 1st processing step, the heating nip roll pair 29 heats the plurality of filaments 61 and the plurality of resin pellets 66 . Thereby, the pair of heating nip rolls 29 can be used also as a heating device for heating the plurality of filaments 61 and the plurality of resin pellets 66 . Thereby, simplification of the fibrous article manufacturing apparatus can be achieved. In addition, in the first processing step of the present embodiment, an external force is applied to the plurality of filaments 61 to which the plurality of resin particles 66 are adhered while heating the plurality of filaments 61 and the plurality of resin particles 66, so that the The fiber gap is narrowed, and the heating temperature of the plurality of filaments 61 and the plurality of resin pellets 66 in the first treatment step is set to a temperature equal to or higher than the glass transition temperature of the filaments 61 . In addition, in the first processing step of the present embodiment, an external force is applied to the plurality of filaments 61 to which the plurality of resin particles 66 are adhered while heating the plurality of filaments 61 and the plurality of resin particles 66, so that the The fiber gap is narrowed, and the heating temperature of the plurality of filaments 61 and the plurality of resin pellets 66 is set to a temperature in the range of 50°C or higher and 200°C or lower.

In addition, in the adhesion step, as an example, a dispersion liquid in which a plurality of resin particulates 66 are dispersed is used. If a dispersion liquid is used, the plurality of resin particles 66 can be easily attached to a wide range of the surface of the filament 61 due to the fluidity of the dispersion liquid. Moreover, in the attaching process of this embodiment, the dispersion liquid detached from the filament 61 in the 1st processing process is reused. Thereby, the manufacturing cost of the fibrous article 65 can be easily further reduced.

Moreover, as an example, in a 1st processing process, the said external force set to the value of 0.05 MPa or more is applied to the plural filaments 61 to which the plural resin particulates 66 are adhered. Thereby, the above-mentioned sufficient external force can be imparted to the plurality of resin particulates 66, and the resin fibers 66a can be easily formed.

Moreover, in the adhesion process of this embodiment, the some resin granular material 66 which has a layered structure is used. Thereby, in the second processing step, the resin fibers 66a can be easily formed from the plurality of resin particles 66 .

Moreover, in the 2nd processing process, the fiber composite 67 whose weight ratio W1/W2 is set to the value in the range of 3.00 or more and 200.00 or less is formed. Thereby, the resin fiber 66a can be stably carried by the filament 61, and the function of the resin fiber 66a can be easily exhibited. In addition, in the adhesion step, as an example, the filament 61 whose outer diameter is set to a value in the range of 5 μm or more and 50 μm or less is used. Thereby, the difference between the outer diameters of the filaments 61 and the resin fibers 66a can be increased, and the degree of freedom in designing the fiber article 65 can be improved.

Moreover, in the attachment process of this embodiment, the filament 61 containing at least one of rayon, polypropylene, polyethylene terephthalate, polyethylene, and cellulose acetate is used. Moreover, in the adhesion process of this embodiment, the resin particulate material 66 containing at least one of polytetrafluoroethylene, polypropylene, polyethylene, and polyamide is used.

According to the above method, the fibrous article 65 containing the filaments 61 and the resin fibers 66a can be efficiently produced. In addition, by combining the filaments 61 and the resin fibers 66a each containing a specific material, the respective functions of the filaments 61 and the resin fibers 66a can be easily exhibited.

In addition, in this embodiment, the process of packing the tow tape 64 manufactured by the tow tape manufacturing apparatus 1 in the packing container 19 is shown. However, the fiber product 65 may be manufactured by introducing the tow tape 64 into the fiber product manufacturing apparatus 20 without being bundled. In addition, the structure of the fiber article manufacturing apparatus 20 is not limited to the above-mentioned. In addition, as the dispersion liquid used in the adhesion step, for example, a slurry containing a relatively large amount of resin particulates 66 may be used.

Also, the resin pellets 66 may be attached to the filaments 61 after the yarns 62 or the individual yarns 63 are formed. Moreover, the tow tape manufacturing apparatus 1 may be equipped with the powder addition means which attaches the powdery resin particulate matter 66 to the filament 61 instead of the dispersion liquid attachment means 5. In addition, in the case of processing the plurality of filaments 61 into a sheet shape, the attachment step may be performed before or after processing the plurality of filaments 61 into a sheet shape.

Next, a modification of the present embodiment will be described. In the first processing step of the first modification, by pressing the plurality of filaments 61 (for example, the plurality of filaments 61 after fiber opening) with a pressing device, the resin particles 66 adhered to the plurality of resin particles 66 are pressed. The filaments 61 impart the above-mentioned external force. Moreover, in the 1st processing process of a 2nd modification, the several filaments 61 and the several resin pellets 66 are heated further by the said pressurizing apparatus which was heated. The fibrous article 65 can also be similarly manufactured by these manufacturing methods. Hereinafter, other embodiments will be described focusing on the differences from the first embodiment.

(Second Embodiment) FIG. 6 is a schematic view of a fiber article manufacturing apparatus 120 according to the second embodiment. In the present embodiment, as an example, the manufactured bundle-shaped tow band 164 (to which the resin particulates 66 are not adhered) is used. As shown in FIG. 6 , the fibrous article manufacturing apparatus 120 includes a plurality of guide members (for example, guide rollers R2 to R7 ) for guiding the tow tape 164 unwound from the packing container 19 in the conveyance direction P. The attachment unit 105 attaches the dispersion liquid to the tow tape 164 to be conveyed; and the fiber opening unit 124 is introduced into the tow tape 164 to which the dispersion liquid is attached. Moreover, the fiber product manufacturing apparatus 120 is provided with the 1st fiber opening roll pair 26, the 2nd fiber opening roll pair 27, the heating apparatus 16, and the nip roll pair 129. The pair of nip rolls 129 is arranged in the heating device 16 and heated.

Inside the attaching unit 105, the tow belt 164 is guided by the guide rollers R4 and R5 to be immersed in the dispersion liquid based on the dip coating method, whereby the dispersion liquid is attached. The tow tape 164 to which the dispersion liquid has been attached to the attachment unit 105 is opened by the opening unit 124 , the first pair of opening rolls 26 , and the pair of second opening rolls 27 . Then, the tow band 164 is introduced into the heating device 16 to be preheated, and passes through the pair of nip rolls 129 heated by the heating device 16 . Thereby, the 1st and 2nd process steps are performed, and the resin fiber 66a and the fiber composite 167 are formed. The fiber article 165 is produced by cutting the fiber composite 167 into a predetermined size, for example. According to this embodiment, the fiber article 165 containing the resin fiber 66a can be efficiently manufactured using, for example, the tow tape 164 manufactured by a conventional method.

(third embodiment) FIG. 7 is a schematic view of a fiber article manufacturing apparatus 220 according to the third embodiment. In the present embodiment, similarly to the second embodiment, the manufactured bundle-shaped tow tape 164 (to which the resin particulates 66 are not adhered) is used. As shown in FIG. 7 , the manufacturing apparatus 220 includes a short fiber processing apparatus 40 , a nonwoven fabric processing apparatus 41 , and a hot pressing apparatus 17 .

The staple fiber processing apparatus 40 cuts the filaments 61 of the tow band 164 to which the dispersion liquid is adhered by the adhering unit 105 and is guided by the guide rollers R2 to R8 to be short fibers. The non-woven fabric processing device 41 processes the plurality of filaments 61 that have been short-fibered out from the short-fiber processing device 40 into a sheet shape to form a non-woven fabric. The nonwoven fabric processing device 41 forms a nonwoven fabric based on, for example, a known nonwoven fabric manufacturing method (eg, a fleece forming method, a fleece bonding method, or the like).

The heat press device 17 heats and pressurizes the nonwoven fabric unloaded from the nonwoven fabric processing device 41 . The first and second processing steps are performed by passing the nonwoven fabric through the hot pressing device 17 . Thereby, the fibrous article 265 using the nonwoven fabric is produced.

In this way, in the processing step of the manufacturing method of the fiber article 265 of the present embodiment, a nonwoven fabric is formed from the plurality of filaments 61 . Moreover, in the 1st processing step, the plurality of filaments 61 and the plurality of resin pellets 66 are heated and pressurized. That is, in the first processing step, by pressing the plurality of filaments 61 with the hot pressing device 17, the above-described external force is applied to the filaments 61 to which the plurality of resin particulates 66 are attached. Moreover, in the 1st processing step, the plurality of filaments 61 and the plurality of resin pellets 66 are heated by the heated hot pressing device 17 . Thereby, the fibrous article 265 using the nonwoven fabric including the filaments 61 and the resin fibers 66a can be efficiently produced.

Furthermore, a heating device for heating a plurality of filaments 61 and a plurality of resin pellets 66 may be constituted separately, and a plurality of filaments 61 may be squeezed to heat the length of the resin pellets 66 attached thereto. The wire 61 imparts the above-mentioned external force to the pressurizing means.

(confirmation test) Confirmation tests were performed in the following order. Based on the first embodiment, fibrous articles 65 were prepared as Examples 1 to 3, in which the filaments 61 as the first fibers were made of cellulose acetate and the resin fibers 66a as the second fibers were made of PTFE. In Examples 1 to 3, the heating temperature of the plurality of filaments 61 and the plurality of resin pellets 66 in the first treatment step was changed within the range of 50°C or higher and 100°C or lower.

Further, as Example 4 and Comparative Example 1, fibrous articles were prepared which were produced by comprising cellulose acetate as the filaments 61 as the first fibers and PTFE as the resin fibers 66a as the second fibers. Example 4 was set in the same manner as in Examples 1 to 3 except that heating was not performed in the first treatment step. Comparative Example 1 was set in the same manner as Examples 1 to 3 except that the first processing step was not performed.

In addition, as Comparative Example 2, the following fibrous article was prepared. The fibrous article was composed of cellulose acetate as the filaments 61 of the first fibers, and the filaments 61 were heated to 100° C. without adhering the resin pellets 66 to the filaments 61 . manufactured. In addition, as Comparative Example 3, the following fibrous article was prepared, which consisted of cellulose acetate as the filaments 61 as the first fibers, and was produced without adhering the resin pellets 66 to the filaments 61 and without heating the filaments 61 . In Examples 1 to 4 and Comparative Examples 1 to 3, cellulose acetate with a single fineness (FD) of 2 was used, the basis weight of cellulose acetate was set to 150 g/m ² , and the adhesion amount of PTFE particles was set to About 10 wt%. In addition, the nip pressure of the pair of heating nip rolls 29 was set to 0.4 MPa.

In order to confirm the performance when the obtained fibrous articles of Examples 1 to 4 and Comparative Examples 1 to 3 were used as filter members, the capture efficiency (%) was measured. The capture efficiency was measured as the particle capture efficiency when air containing NaCl particles having a particle size of 0.4 μm was passed at a flow rate of 5.3 cm/sec. The test results are shown in Table 1.

[Table 1] 1st fiber 2nd fiber Heating temperature during crimping (℃) Capture efficiency (%) Example 1 Cellulose acetate PTFE 100 82 Example 2 Cellulose acetate PTFE 70 77 Example 3 Cellulose acetate PTFE 50 65 Example 4 Cellulose acetate PTFE Unheated (about 22°C) 55 Comparative Example 1 Cellulose acetate PTFE Not crimped 49 Comparative Example 2 Cellulose acetate none 100 0 Comparative Example 3 Cellulose acetate none Unheated (about 22°C) 0

As shown in Table 1, it was confirmed that Examples 1 to 3 have particularly good properties. Example 4 also had good performance second only to Examples 1-3. Although the comparative example 1 was formed with the 2nd fiber, the performance as a fibrous article was inferior to Examples 1-4. In Comparative Examples 2 and 3, the second fibers were not formed and the trapping efficiency was not obtained. From the above, the advantages of Examples 1 to 4 can be confirmed.

The respective configurations and combinations thereof in each embodiment are examples, and configuration additions, omissions, substitutions, and other modifications can be appropriately made without departing from the gist of the present invention. The present invention is not limited by the embodiments, but only by the scope of the patent application. Furthermore, each aspect disclosed in this specification can also be combined with any other feature disclosed in this specification. Of course, the fibrous article of the present invention is not limited to the filter member, but can also be an article for other purposes.

P: conveying direction 17: Hot pressing device (pressurizing device) 29: Heating nip roll pair (a pair of nip rolls) 61: Filament (first fiber) 64,164: Ribbon 65,165,265: Fiber Items 66: Resin pellets 66a: Resin fiber (second fiber) 67,167: Fiber Composites

Fig. 1 is a schematic view of the tow tape manufacturing apparatus of the first embodiment; [Fig. 2] is a schematic cross-sectional view of the tow belt produced by the tow belt production device of Fig. 1; [Fig. 3] It is a schematic diagram of a fiber article manufacturing apparatus according to the first embodiment; [Fig. 4] is a schematic cross-sectional view of the tow band after being thermally crimped by the pair of heating nip rolls in Fig. 3; [Fig. 5] is a cross-sectional view of a fiber composite (fiber article) manufactured by the fiber article manufacturing apparatus of Fig. 3; [Fig. 6] is a schematic diagram of a fiber article manufacturing apparatus according to the second embodiment; [ Fig. 7] It is a schematic view of a fiber article manufacturing apparatus according to a third embodiment.

1: Tow Tape Manufacturing Device

2: Mixing device

3: Filter device

4: Spinning unit

5: Dispersion Adhesion Unit

6: Oil Adhesion Unit

7: Conveying roller pair

8,9: Conveying rollers

10: crimping device

11: Drying device

12: Pressure components

14: Spinning tube

15: Spinning head

15a: Spinning hole

18: Stuffing Box

19: Bundle Container

60: Spinning Dope

61: Filament (first fiber)

62: Yarn

63: Single yarn

64: Silk Ribbon

C1,C2: Plate

G: Gap

N1, N2: pinch rollers

P: conveying direction

Q: Axis

R1: guide roller

Claims (19)

A method of manufacturing a fibrous article, comprising: an attaching step of attaching a plurality of resin particles containing a polymer capable of fibrillation to a plurality of first fibers; The first treatment step, which is to apply an external force to the plurality of first fibers to which the plurality of resin particles are attached to narrow the fiber gap; and The second treatment step is to form second fibers from the plurality of resin particles by relaxing the external force to form a fiber composite containing the first fibers and the second fibers, and the outer diameter of the second fibers is formed. It is smaller than the said 1st fiber, and is set to the value in the range of 30 nm or more and 1.0 micrometer or less. The method for producing a fibrous article according to claim 1, wherein, in the first treatment step, the plurality of first fibers and the plurality of first fibers are heated with respect to the plurality of first fibers to which the plurality of resin particulates are adhered. One side of the resin pellets gives an external force to narrow the above-mentioned fiber gaps. The method for producing a fibrous article according to claim 1 or 2, further comprising a processing step of processing the plurality of first fibers into a sheet shape. The method for producing a fibrous article according to claim 3, wherein in the processing step, a nonwoven fabric is formed of the plurality of first fibers. The method for producing a fibrous article according to any one of claims 1 to 4, wherein, in the first treatment step, by pressing the plurality of first fibers with a pair of nip rolls, the plurality of first fibers adhered to the The said 1st fiber of a resin granular material provides the said external force. The method for producing a fibrous article according to claim 5, wherein in the first treatment step, the plurality of first fibers and the plurality of resin particles are heated by the pair of heated nip rolls. The method for producing a fibrous article according to any one of claims 1 to 4, wherein, in the first treatment step, the plurality of resins adhered to the plurality of resins are compressed by pressing the plurality of first fibers with a pressing device. The said 1st fiber of a granular material provides the said external force. The method for producing a fibrous article according to claim 7, wherein in the first treatment step, the plurality of first fibers and the plurality of resin pellets are heated by the heated pressing device. The method for producing a fibrous article according to any one of claims 1 to 8, wherein in the first treatment step, the plurality of first fibers to which the plurality of resin particulates are adhered are heated while the plurality of fibers are heated. The first fibers and the plurality of resin pellets apply an external force to narrow the fiber gaps, The heating temperature of the plurality of first fibers and the plurality of resin pellets in the first treatment step is set to a temperature equal to or higher than the glass transition temperature of the first fibers. The method for producing a fibrous article according to any one of claims 1 to 9, wherein in the first treatment step, the plurality of first fibers to which the plurality of resin particulates are adhered are heated while the plurality of fibers are heated. The first fibers and the plurality of resin pellets apply an external force to narrow the fiber gaps, The heating temperature of the plurality of first fibers and the plurality of resin pellets in the first treatment step is set to a temperature in the range of 50°C or higher and 200°C or lower. The method for producing a fibrous article according to any one of claims 1 to 10, wherein in the adhering step, a dispersion liquid in which the plurality of resin particulates are dispersed is used. The method for producing a fibrous article according to claim 11, wherein an aqueous dispersion obtained by dispersing the plurality of resin particles in water is used as the dispersion. The method for producing a fibrous article according to claim 11 or 12, wherein in the adhering step, the dispersion liquid detached from the first fibers in the first treatment step is reused. The method for producing a fibrous article according to any one of claims 1 to 13, wherein, in the first treatment step, the pressure applied to the plurality of first fibers to which the plurality of resin particulates adhered is set to 0.05 MPa The above-mentioned external force of the above-mentioned value. The method for producing a fibrous article according to any one of claims 1 to 14, wherein, in the adhering step, the plurality of resin particulates having a layered structure are used. The method for producing a fibrous article according to any one of claims 1 to 15, wherein in the second treatment step, the total weight W1 of the first fibers, the second fibers and the remaining resin particles are formed The above-mentioned fiber composite in which the weight ratio W1/W2 of the total total weight W2 is set to a value in the range of 3.00 or more and 200.00 or less. The method for producing a fibrous article according to any one of claims 1 to 16, wherein, in the adhering step, the first fiber whose outer diameter is set to a value in the range of 5 μm or more and 50 μm or less is used. The method for producing a fibrous article according to any one of claims 1 to 17, wherein in the above-mentioned attaching step, a fiber containing rayon, polypropylene, polyethylene terephthalate, polyethylene, and cellulose acetate is used. at least one of the above-mentioned first fibers. The method for producing a fibrous article according to any one of claims 1 to 18, wherein in the adhering step, the resin pellets containing at least one of polytetrafluoroethylene, polypropylene, polyethylene, and polyamide are used shape.

Images