JPH076096B2 - Composite fiber manufacturing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a composite fiber using corona discharge. [0002] Hair, cotton, linen and the like are relatively short fibers such as hair fall and cotton drop as spinning by-products when they are mixed, but they cannot be spun. However, other than short fibers, the fiber structure does not differ from that of the natural material source, and there is a demand for utilization development as a spinning material utilizing the characteristics of the natural material. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the present invention, the spinning by-product of hair, cotton, etc. as described above is used as a raw material, and this is adhered to another fiber with a binder to produce a hair, cotton etc. The purpose is to obtain a composite fiber having a natural texture. The present invention is a spinning material in which a static disc corona discharge is generated between a rotating disc and a counter electrode which is arranged with a gap at the periphery thereof, and which is dispersed in a solution on one side of the disc. The binder is supplied to the other surface, and the spinning material and the binder are collected and brought into contact with the peripheral portion of the disk by the action of centrifugal force, and are also focused on the base material arranged on the opposite electrode by the action of electrostatic corona discharge. The present invention relates to a method for producing a composite fiber, which comprises: The spinning material used in the present invention is a short fiber which is a by-product of spinning of wool, cotton, linen or the like during spinning or weaving, and is difficult to use in conventional spinning. Of course, long fibers or synthetic fibers may be cut into short fibers, but the original purpose of the present invention is to use the short fibers that could not be used in the conventional method as described above by taking advantage of the characteristics of the material. However, the main purpose is to use it effectively. A particularly useful spinning material for applying the present invention is hair loss. The method of the present invention can be applied to a substantially powdery material having a fiber length of 3 to 50 μm to a relatively long spinning material having a fiber length of 50 to 4 mm, but a fiber material of 5 to 2 mm is usually suitable. Three
If it is shorter than μm, the characteristics of the spun material itself are lost, and if it is longer than 4 mm, it becomes difficult to apply the method of the present invention. As the base material arranged on the opposite electrode, thread, filament, cloth, non-woven fabric, leather, resin film, sheet,
Examples include paper, knit, gauze, wire mesh, foil and the like. 1 and 2 show examples of the schematic construction of an apparatus for producing the conjugate fiber of the present invention using the above spinning material. FIG. 1 shows an example of the schematic structure of a rotating disk and its periphery. FIG. 2 is a plan view of the schematic configuration in combination with a counter electrode in which a rotating disk is arranged at the center and a gap is provided around the disk, as viewed from above. In FIG. 1, the rotating disk (1) is a vertically rotating disk rotating shaft.
The disk rotating shaft (2) is attached to (2) and is connected to a rotation driving means (not shown). A high voltage can be applied to this rotating disk by a high voltage power source (not shown). A binder supply pipe (3) is inserted into the inside of the disc rotating shaft (2) up to the lower part of the rotating disc (1), and is ejected from the rotating shaft at the lower part of the rotating disc (1), and its tip is It is connected to a nozzle (4) directed towards the rotating disk. A spinning material supply tank (5) for supplying a spinning material impregnated with a low boiling point solvent is provided above the rotating disk (1). The spinning material supplied to the tank (5) is supplied onto the disk from the material supply port (6) attached to the tank. A binder leak receiving tank (7) is provided below the rotating disk (1) to maintain the equipment. In FIG. 2, 10 cm to 2 m, preferably 50 cm around the rotary disk (1) having the structure shown in FIG.
The mesh-like conductive counter electrode (8) in which the fibers are arranged is arranged at equal intervals of ˜150 cm, and the counter electrode (8) can be moved by the guide rollers (10) to (16). This conductive counter electrode is grounded by any suitable means, eg roller (12).
Can be grounded through. Peeling roller (17)
Pulls out the fiber bundles collected on the counter electrode (8). If necessary, the convergent product is threaded on the twisting machine (18) to form a string. In order to manufacture the composite fiber of the present invention having the above structure, first, the spinning material is supplied from the material supply port (6) and the binder resin is supplied through the binder supply pipe (3) to the nozzle.
Supply from (4) on the rotating disk. Although FIG. 1 shows a configuration example in which the spinning material is supplied from the upper side of the rotating disk and the binder is supplied from the lower side, the reverse is also possible. The rotating disk (1) is not particularly limited as long as it is a conductive material, and for example, stainless steel, copper, iron or the like can be used. An appropriate protective film may be provided on both sides of the disk in a material such as copper or iron that causes corrosion. At this time, a solvent resistant to the solvent in which the binder is dissolved is selected, and the tip of the disk is exposed without being covered. The size of the disk is not particularly limited, but the diameter is preferably 50 to 400 mm from the viewpoint of practicality, and the thickness of the peripheral edge of the disk is 1 μm to 1000 μm. The spinning material is impregnated with a low boiling point solvent such as an alcoholic solvent, and the disc (1) is passed through the material supply port (6).
Supply to. To supply the spinning material to the tank (5), a fixed amount of the spinning material impregnated with a low boiling point solvent may be charged in the tank (5) in advance, or it may be continuously supplied from another route by a supply means (not shown). May be supplied in a positive manner. Although various other feeding methods can be adopted, a method capable of continuously feeding is preferable. As such a method, for example, a means for forcibly blowing the spinning material is adopted, and a means for blowing a low boiling point solvent on the way is used. It is also possible to take a method such as sending it through a cyclone that it has and sending it onto a disk. The supply amount of the spinning material is 100 to 30 in dry.
00 g / min, more preferably 500 to 700 g / min is suitable. The amount of the low boiling point solvent impregnated into the spinning material is appropriately equal to or more than the weight of the material. If not impregnated with solvent,
Since the spinning material is scattered by the rotation of the disk, the solvent immersion is an essential condition in this case. At the same time as supplying the spinning material,
Supply binder to the other side of the disk. The binder is supplied to the nozzle through the supply pipe (3).
It is supplied from (4) to the rotating disk (1). The binder is preferably supplied to the surface of the disk in the vicinity of the center of the disk, and there are methods such as injection from the nozzle end, spraying, and the like, which uses capillary phenomenon. The method using the capillarity is particularly preferable because the supply amount can be adjusted by adjusting the rotation speed of the disk. The binder that can be used in the present invention may be either an emulsion type or a solution type, but when water resistance is required, a binder that becomes water-insoluble after drying is preferable. As such a binder, an acrylic type, vinyl acetate type or vinyl chloride type emulsion type binder, or an aqueous solution type of an acrylic ester or the like (in this case, if ammonium is used as the salt, it can be made water-insoluble after drying) ), Or a solution obtained by dissolving a resin such as rayon, vinylon, polyester, or acrylic acetate in a suitable solvent having an appropriate drying ability, and the solution has a viscosity of about 3 to 150 centipoise, preferably about 10 to 70 centipoise. Adjust to. The supply amount of the binder may be appropriately adjusted depending on the kind of the spinning material to be used, the composite ratio of the spinning material, etc., but in order to make the most of the naturalness of the spinning material, the adhesiveness with the fiber As much as possible, the spinning material should be contained as much as possible. Further, in order to further utilize the naturalness of the spun material, it is preferable to use it in combination with a resin having the same properties as the spun material. As such a combination, for example, when using wool as the spun material, a binder is used. Polyester or acrylic acetate resin or the like is used for, cotton and rayon, vinylon or polyester for cotton, and hemp for rayon or polyester. The present invention can be applied without being limited to such combinations, and composite fibers having various characteristics can be prepared. The supplied spinning material and binder are transferred to the disk peripheral edge along the front and back surfaces of the disk by the rotation of the disk (1). Rotation speed of the disk is 500-4000
rpm, preferably 1500-3500 rpm. The optimum rotation speed depends on various factors such as the viscosity of the binder, the compounding amount, and the corona discharge voltage, so it may be selected experimentally. When a voltage is applied between the disk and the counter electrode provided with a gap around the disk to generate electrostatic corona discharge, the spinning material and binder that have moved to the disk peripheral portion are discharged toward the counter electrode. It At that time, both of them come into contact with each other at a position very close to the peripheral edge of the disk, for example, at a position apart from several μm to several tens of μm, and are collected on the surface of the base material on the counter electrode. As the applied voltage, a voltage of 30 KV to 200 KV is applied with the rotating disk as a cathode and the conductive roller side as an anode. Specifically, it is appropriately set depending on the spinning material to be skipped from the disk, the amount and type of binder, the rotational speed of the disk, the moving speed of the counter electrode, and the like. As the counter electrode, a wide net-like one is used in FIG. 2, but the present invention is not particularly limited to this, and any other ring-like or plate-like shape may be used. Any structure may be used as long as the corona discharge is efficiently performed, the target substrate can be easily arranged, and the bundle can be easily pulled out. When the counter electrode (8) has a vertical width as shown in FIG. 2, spinning is performed while moving the rotating disk (1) up and down so that the converging material is uniformly attached to the surface of the base material on the counter electrode. The material and binder can be blown off by corona discharge. The width of the counter electrode is not particularly limited as long as the conditions are satisfied, but from the viewpoint of practicality, it is 10 cm to 2 m, preferably 50 cm to
It is 150 cm. In the case of a counter electrode (8) having a width, a desired base material is placed in the counter electrode (8) and an insulating wakka having a thickness of 5 to 3 mm.
It is preferable to arrange (9). Second for clarity
In the figure, a-a 'when such a vodka is placed
FIG. 3 shows an example of the schematic structure of the cross section of FIG. Wakka (9) is the opposite pole
It is preferable that the surfaces of the conductive nets, which are arranged at an appropriate interval inside (8), are exposed at intervals of 0.3 to 5 mm, preferably 0.5 to 2 mm. This interval may be appropriately set according to the desired size and shape of the fiber. The width of the wakka itself is about 0.3 mm to 30 mm, preferably about 1 mm to 10 mm. If a wakka is provided in this way, a net-shaped counter electrode with a width
(8) On the surface of the base material above, it is possible to efficiently obtain the conjugate fiber in which the converging substance adheres on the line. By not raising the wadders and simply moving the counter electrode or the corona discharge disk up and down,
It is possible to obtain a composite fiber in which short fibers are adhered to the entire surface of the base material. The bundle collected on the counter electrode (8) base material is a spinning material in which an undried binder is attached to the surface and is entangled, and this is collected by the guide rollers (10) to (16). . This can be taken out by a peeling roller (17) equipped with a peeling means such as a brush, a hook and a screw.
In this case, as described above, the converging object can be formed on the yarn on the counter electrode (8). EXAMPLE A bleached cotton cloth (No. 30 yarn, plain weave, width 300 mm × length 1.) was used on the opposite electrode using a device as shown in FIGS. 1 to 3.
85m) pasted, wool noil (merino type, size 0.3 ~
About 10 g (0.7 cm, 0.5 cm on average) from the material supply port (6) and a binder (MA-3 Matsumoto Yushi-Seiyaku Co., Ltd .; viscosity Ford cup # 4) from the nozzle (4) at a speed of about 25 ml per minute. The corona was discharged toward the opposite electrode while being supplied. The nozzle (4) and the disc (1) were reciprocated up and down 3 times at a speed of cm / min for 3 minutes. The corona discharge device, the structure of the counter electrode and the method of sticking the base material are as follows. Corona discharge device (Lands) Applied voltage 60KV Current 1mA <Disc rotation speed 3600rpm Direct diameter 160mm ¢ Stroke 300mmL Speed about 2100mm / min (35mm / sec) Number of times Up and down 3 reciprocating poles (earth part) Material Iron wire Ami , 60 mesh (galvanized) shape Cylindrical, diameter 600mm ¢, width 280mm
W, stationary attachment method A 50 mm double-sided adhesive tape was attached to the upper and lower ends of the net, and the base material was attached along the circumference of the adhesive tape. It was possible to observe that the wool fibers of the raw material were randomly (orientated with free orientation) and chained on the surface of the obtained conjugate fiber. (Observation equipment; Carton m
icroscope 20X-60X). Of particular note was the chain of wavy curves of simple noils. This is a phenomenon not seen in the unidirectionality of electrodeposition processing, and it is also a relief from the thorns when cutting, which has material significance. A soft vinyl chloride sheet (3
00 mm × 1.85 m × 100 μs: manufactured by Sanpo Resin Co., Ltd.) was used to obtain a composite fiber in the same manner as above. INDUSTRIAL APPLICABILITY According to the present invention, a spinning material composed of short fibers such as wool and cotton can be combined with another base material to obtain a composite fiber having a feeling of natural material such as wool and cotton. it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of the schematic configuration of a rotating disk and its periphery. FIG. 2 is a plan view of the schematic configuration of a combination of a rotating disc and a counter electrode arranged around the disc with a gap therebetween, as viewed from above. FIG. 3 is a sectional view taken along line aa ′ in FIG. [Explanation of Symbols] Symbols in the figure are as follows. 1 ... Disc 2 ... Rotating shaft 3 ... Binder supply pipe 4 ... Nozzle 5 ... Tank 6 ... Material supply port 7
... Leak receiving tank 8 ... Counter electrode 9 ... Wacker 10-16 ... Guide roller 17 ... Peeling roller 18 ... Twisting machine

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Claims (1)

[Claims] 1. By generating electrostatic corona discharge between the rotating disk and the counter electrode arranged with a gap at its periphery, the spinning material dispersed in the solution on one side of the disk, the binder is supplied on the other side, and by the action of centrifugal force, A method for producing a composite fiber, characterized in that the spinning material and the binder are collected and brought into contact with the peripheral portion of the disk, and are also focused on a base material arranged on the counter electrode by the action of electrostatic corona discharge. 2. The manufacturing method according to claim 1, wherein the spinning material is a short fiber of 3 μ to 4 mm and a long fiber. 3. The manufacturing method according to claim 1, wherein the spinning material is a fiber material by-product (hair loss). 4. The method according to claim 1, wherein the binder is an acrylic polymer. 5. The manufacturing method according to claim 1, wherein corona discharge is generated using the disk as a cathode and the counter electrode as an anode. 6. The manufacturing method according to claim 1, wherein a voltage of 50 KV to 200 KV is applied between the disk and the counter electrode. 7. The manufacturing method according to claim 1, wherein the rotation speed of the disk is 500 to 4000 rpm.